35results about How to "Increase the air concentration" patented technology

A high capacity adsorbent may be used for enriching oxygen concentration in an air stream. Such a high capacity adsorbent may be from about 2 to about 3 times lighter relative to the currently available technology. Furthermore, the high capacity adsorbent is readily capable of regeneration after deactivation by water vapor. Unlike current available immobilization technology in which clay binder was used to bind 13X zeolite and additional 10% organic binder was used to immobilize beads, the adsorbents of the present invention may be made using just an organic binder, thereby reducing pore spoilage caused by the clay binder. Further unlike conventional adsorbents, which may use sodium as its cation, the adsorbent of the present invention uses a lithium cation, thereby resulting in enhanced nitrogen adsorption performance.

The present invention relates to a kind of differential-type aerated deflecting bucket. It includes bucket body, and its characterized by that on the bucket body locally are set several small deflecting buckets, these small cleflecting buckets and said bucket body are identical in the slope-raising point, and the overflowing surfaces fromed from these small deflecting buckets and said bucket body are convexly-concavely alternated. Said invention also provides the working principle of said differential-type aerated deflecting bucket. Said deflecting bucket can effectively raise amount of air entrainment and can effectively protect outlet structure against cavitation erosion.

The invention relates to a narrow-band concurrent steam condenser tube bundle with a dual-trapezoid air cooling region. The tube bundle comprises two main condensing regions and the air cooling region between the two narrow-band concurrent main condensing regions, wherein all the main condensing regions and the air cooling region are formed by arranging cooling water tubes in a staggering manner; the outer edges of the main condensing regions are provided with a plurality of reducing steam guide passages which tilt upwards, and the inner edges of the main condensing regions are provided with a plurality of uncondensed gas collection passages which tilt downwards; the steam guide passages and the uncondensed gas collection passages are arranged in the staggering manner to partition the main condensing regions into turned narrow-band ribbons; the air cooling region is integrally elongated and consists of an upper trapezoid and a lower trapezoid; steam uniformly and concurrently flows into the main condensing regions for condensation through the guide passages, and the remaining uncondensed gas flows into the elongated air cooling region for further cooling through the uncondensed gas collection passages. Compared with the prior art, the tube bundle has the advantages of small steam resistance, full condensation, high air concentration at an outlet and capability of exhausting uncondensed gas by using exhaust equipment under low exhaust pressure without increasing the pressure of a steam condenser.

The present invention provides a method for improving the air quality in the limited space and the equipment using thereof. The said method is that the air suctioned from the limited space is transferred to the outside of the limited space and acts as an air source for making oxygen. The oxygen is extracted from the said air source and the waste gas generated thereby is directly discharged to the outside of the limited space. The oxygen extracted is transferred into the limited space and offered the said space by means of the oxygen-supply controller. In addition, the atmosphere is supplemented into the limited space when the air inside is suctioned out. The equipment for the said method includes an indoor machine positioned in the limited space, an outdoor machine and an atmosphere supplement equipment. The present invention can supplement the atmosphere into the limited space while suctioning the air from the space, and can circulate, cool (heat), dehumidify and disinfect the air in the limited space at the same time. Consequently the quality of the said air in the limited space is improved effectively and the oxygen concentration in the limited space is ensured at a prescribed range.

The invention relates to a facility for eliminating the negative pressure of a bottom plate at a torrent diffusion slope-variable section of a flood discharging tunnel, The facility comprises a step-down floor and pressing holes, wherein the step-down floor is arranged in front of a negative pressure region of the bottom plate at a diffusion section of the flood discharging tunnel; the pressing holes are arranged at two ends of the step-down floor outside a side wall of the flood discharging tunnel; a hollow cavity formed between a jet flow surface generated by discharged water in the flood discharging tunnel flowing across the step-down floor and a step-down floor bottom plate surface is communicated with air through the pressing holes so that the negative pressure of the bottom plate of the flood discharging tunnel is reduced and partial damage of the bottom plate of the flood discharging tunnel is avoided. In general, the step-down floor height is 0.30-1.00m, and the sizes of the pressing holes are determined by factors, such as the step-down floor height, step-down floor aerating capacities, a negative pressure region range and the like. A physical model test result shows that the pressing facility provided by the invention can be used for effectively eliminating a negative pressure value of the bottom plate at the torrent diffusion section of the flood discharging tunnel, increasing water flow aerating concentration and improving the energy dissipation effect of a stilling basin.

A portable oxygen enriching device for highland respiration is composed of a face mask, an oxygen-enriching unit with a pressurizer communicated with atmosphere and a power supply (battery unit), and a buffering tube. It features that when ambient temp is lower than -18 deg.C, said battery unit can be put in the pocket of human underwear and electrically connected to the pressurizer for normal power supplying.

The invention provides a swirl shaft flood discharging tunnel with a volute chamber aerator. A side wall originally connected with a volute chamber shifts towards the center side of the volute chamberby a distance, and therefore the vertical aerator is formed in the volute chamber. When water flow passes through a step-down floor, an aerated cavity is formed, external air continuously carries outneeded gas supply on the water flow close to the wall side through the cavity, the aerated concentration of the water flow close to the wall is increased, and therefore the cavitation and cavitationerosion resistance of a whole shaft structure is greatly improved. Meanwhile, the aerated structure is far simpler than a conventional shaft aerator, and the engineering design difficulty and engineering cost can be greatly reduced. In addition, a fold line structure of the aerator replaces an original smoothly tangent structure, the engineering construction difficulty is greatly reduced, and thecavitation erosion and cavitation resistance of the connected position of the aerator and the shaft structure is improved.

The invention relates to the technical field of water conservancy facilities and provides an adjustable aeration ecology landscape retaining dam which comprises an upper dam body, a middle dam body and a bottom dam body. The bottom dam body is fixed to a river bed. A height-adjustable supporting device is connected between the upper dam body and the middle dam body, and a height-adjustable supporting device is connected between the middle dam body and the bottom dam body. The height-adjustable supporting devices are electrically connected with a controller. The upper dam body comprises a first flow-passing surface which comprises a first waterways experiment station (WES) weir surface. The middle dam body comprises a second flow-passing surface, and the second flow-passing surface comprises a second WES weir surface and a first reverse curve surface. The bottom dam body comprises a third flow-passing surface, and the third flow-passing surface comprises a third WES weir surface, a first inclined surface, a second reverse curve surface, a first horizontal surface and a third reverse curve surface which are connected in sequence. According to the adjustable aeration ecology landscape retaining dam, the distances between the three dam bodies can be adjusted according to upland water conditions, accordingly the water passing condition is adjusted, and the concentration of air entrained in water is increased.

A high capacity adsorbent may be used for enriching oxygen concentration in an air stream. Such a high capacity adsorbent may be from about 2 to about 3 times lighter relative to the currently available technology. Furthermore, the high capacity adsorbent is readily capable of regeneration after deactivation by water vapor. Unlike current available immobilization technology in which clay binder was used to bind 13X zeolite and additional 10% organic binder was used to immobilize beads, the adsorbents of the present invention may be made using just an organic binder, thereby reducing pore spoilage caused by the clay binder. Further unlike conventional adsorbents, which may use sodium as its cation, the adsorbent of the present invention uses a lithium cation, thereby resulting in enhanced nitrogen adsorption performance.

The invention discloses a multi-channel aeration facility with a front oblique tail pier. The multi-channel aeration facility is used for eliminating water crowns behind a gate pier of a spillway of hydraulic and hydropower engineering and performing aeration protection on flow surfaces. The multi-channel aeration facility comprises the oblique tail pier and an aeration facility. The oblique tail pier and the aeration facility are arranged behind the gate pier of the spillway, the oblique tail pier is arranged at the tail of the gate pier, the aeration facility is closely connected to the rear of the section side of the oblique tail pier, and the oblique tail pier is completely coincided with an initial section side which is formed by a bottom cavity of the aeration facility. The aeration facility can be selectively in a 'flip bucket and vertical drop' combination modes, a 'flip bucket and aeration groove' combination mode and the like. The multi-channel aeration facility has the advantages that air supply channels can be increased while the water crowns behind the gate pier can be effectively eliminated, a three-dimensional aeration cavity is formed, the bottom cavity and a natural tail cavity of the oblique tail pier can be communicated with each other via the three-dimensional aeration cavity, accordingly, the aeration areas of the inside of the cavities are increased, and the water aeration quantity, an air-water ratio and a flow surface aeration concentration are also correspondingly increased; a multi-channel air feeding effect is favorable for sufficient and uniform all-section aeration, the air speeds of two side ventilation wells are reduced, and an aeration protection function of the aeration facility is further strengthened.

The invention discloses an anti-cavitation facility of a stepped overflow dam. According to the anti-cavitation facility of the stepped overflow dam, a flaring pier is used for increasing the compression capacity on the water flow, the discharged water flow is transversely contracted and vertically stretched, and the discharged water flow is ejected to the downstream. Stranded ejection water tongues aerate and collide with each other in the air, so that energy is dissipated; in addition, a flip bucket arranged at the tail of the flaring pier can lift the discharged water flow away from the overflow surface, an aeration cavity is formed. An anti-cavitation transition step is utilized to mix outside air into the cavity, so that the negative pressure at the junction of the flip bucket and thetransition step is greatly reduced, the aeration concentration in the step is improved, and the possibility of cavitation damage is reduced. The step behind the cavity happens to be the drop point ofthe front edges of the water tongues, and the friction effect of the step on the water flow is utilized to accelerate the dissipation of the step on the discharge energy; after that, a reverse arc section and a stilling basin are utilized for further energy dissipation. The anti-cavitation facility of the stepped overflow dam utilizes a combined flood discharge energy dissipation structure with section partition and region partition, cavitation damage on the overflow dam surface is reduced, and the energy dissipation rate is improved.

The invention discloses an overflow weir and elastic force type stilling pool combined energy dissipation structure and an energy dissipation method. The overflow weir and elastic force type stillingpool combined energy dissipation structure comprises an overflow weir and a stilling pool, the overflow weir comprises a WES straight line section and a WES ogee section, the WES straight line sectionis connected to the WES ogee section, a rotating shaft part is arranged at the joint, a hydraulic jacking device is arranged at the bottom of the tail part of the WES ogee section, the tail part of the WES ogee section of the overflow weir is connected to the stilling pool, the stilling pool comprises a stilling pool head part, a stilling pool middle part and a stilling pool tail part, the tail part of the WES ogee section of the overflow weir is connected to the stilling pool head part, and more than one rubber support is arranged under a base plate of each of the stilling pool head part, the stilling pool middle part and the stilling pool tail part. According to the overflow weir and elastic force type stilling pool combined energy dissipation structure and the energy dissipation method, the ascending height of the hydraulic jacking device is adjusted, so that the height difference between the WES ogee section of the overflow weir and the stilling pool head part can be adjusted, thepurpose of energy dissipation can be achieved, and in the pouring process, the rubber support are arranged under the base plate of each of the stilling pool head part, the stilling pool middle part and the stilling pool tail part, so that energy dissipation can also be carried out.

The invention provides a method for aeration of a pressed inlet of a gentle slope open channel and an application device thereof. A aeration device (1) with an internal cavity communicated with the atmosphere and the cross section in a wedge shape is arranged at the tail end of the pressed inlet of the gentle slope open channel and in the pressed water body; with the wedge end facing the water flow incoming direction and the wedge bottom opposite to the water flow incoming direction, the wedge-shaped aeration device is suspended on holes bodies (4) on two sides of an overflowing hole, so that water flow flowing out of the pressed inlet is divided into an upper part and a lower part to enter the gentle slope open channel, and air in the cavity of the wedge-shaped aeration device enters a space formed by the wedge bottom, the upper water flow and the lower water flow through a vent hole (2) located at the wedge bottom of the wedge-shaped aeration device and is aerated into the water flow. The pressed inlet of the gentle slope open channel is aerated, plenty of air can be aerated once the water flow enters the open channel and be aerated to the bottom of the channel, the method has the advantage of being not subject to limitation of the gradient of a gentle slope, and the aerating corrosion-reducing effect of an overflow wall of the gentle slope open channel can be effectively improved.

The invention discloses a convenient all-weather chemical oxygenation device which comprises an oxygen inhalation tube accommodating room, a water storage room and an oxygen generating reaction room. Powdery potassium superoxide and manganese dioxide are placed in the oxygen generating reaction room; an oxygen outlet guide tube with a first switch and a water inlet tube with a second switch are arranged in the water storage room; one end of the oxygen outlet guide tube is connected with the oxygen generating reaction room, the other end of the oxygen outlet guide tube penetrates through the water storage room to be communicated with the oxygen inhalation tube accommodating room, and a retractable oxygen inhalation tube comprising an oxygen inhalation tube and a buffer tube is connected onto the oxygen outlet guide tube; the water inlet tube is communicated with the water storage room, and the quantity of water flowing into the oxygen generating reaction room is controlled via the second switch; and the oxygen inhalation tube accommodating room for accommodating the retractable oxygen inhalation tube is arranged on the water storage room, a mask is connected onto the retractable oxygen inhalation tube, an elastic band and an adjusting card are arranged on the mask, and an oxygen inhalation tube button is further disposed on the water storage room. The convenient all-weather chemical oxygenation device is simple and practical, is convenient to operate and carry, safe in use and free of any negative effects, and is unaffected by factors such as external environments, weather, time and air temperature.

The invention discloses a combined air entraining facility suitable for a stepped overflow high dam and relates to the technical fields of water conservancy projects and hydropower projects. Accordingto the combined air entraining facility suitable for the stepped overflow high dam, firstly, a first-stage step of the stepped overflow dam is designed to be a large step, so that a water current behind a pier generates a large air entraining cavity under action of the large step, the contact area between the water current and air is enlarged, and as the large cavity can entrain a large amount ofair in case of the high-speed water current, the air entraining concentration of the surface of the stepped overflow dam is increased; and secondly, an arc air entraining groove is additionally arranged in the horizontal face of a tail step of the surface of the stepped overflow dam, the water current flowing state in a traditional step is changed in a forced air entraining mode, the air entraining concentration of the water current at the tail end of the step is increased, and negative pressure is reduced. By means of the combined air entraining mode, the overall air entraining and cavitation alleviation capacities of the surface of the stepped overflow dam can be improved, and the service life of a dam body is prolonged. The stepped overflow dam has high ornamental value when applied tolandscape design.

The invention relates to a deformation type outward convex transition stepped energy dissipation structure and an energy dissipation method thereof. The structure comprises a front aerator, an outwardconvex transition stepped segment, a uniform stepped segment, unit blocks, hydraulic jacking devices and a controller. The front aerator, the outward convex transition stepped segment and the uniformstepped segment are sequentially arranged from the high position to the low position of an overflow dam. The outward convex transition stepped segment is uniformly divided into the multiple unit blocks, the corresponding hydraulic jacking device is mounted on the lower portion of each unit block, all the hydraulic jacking devices are controlled by a control system in a unified manner through control circuits, and the control system is used for controlling the hydraulic jacking units to drive the unit blocks to ascend and descend so as to adjust the stepped height of the outward convex transition stepped segment. According to the structure, under the action of the front aerator and the outward convex transition stepped segment, the aeration energy dissipation effect of water flow is increased to some extent, dam body safety of a flood releasing structure under different kinds of single width flow can be effectively protected, and cavitation and cavitation erosion of the overflow dam can be avoided.

The invention relates to a variable-angle flip bucket and shutter type stilling pool tail bucket combined energy dissipation structure and a using method thereof. According to the variable-angle flipbucket and shutter type stilling pool tail bucket combined energy dissipation structure, the tails of wide tail piers are connected with the head of a flip bucket, the tail of the flip bucket is connected with the first step of a stepped overflow dam, the upstream side and the downstream side of a stilling pool tail bucket are each of a shutter type, and the flip bucket is a variable-angle flip bucket. Through the optimization in the aspects of the angle of the flip bucket and the opening degrees of blades on the upstream side and the downstream side of the shutter type stilling pool tail bucket, firstly, energy dissipation for all stages of flow is greatly improved, and although the back negative pressure of steps is slightly high, the back negative pressure is still within the standard range; secondly, the concentration of entrained air of the bottom step can be increased, and the first several steps are protected through the flip bucket on the front portion, so that the cavitation erosion resistance is obviously improved, and the energy dissipation effect is remarkab; thirdly, the water flow state in a stilling pool is changed, and the pulse load of a bottom plate and the energyefficiency of the stilling pool are greatly improved; and finally, the phenomenon of atomization generated in the drainage process is improved, and water flow discharged out of the pool is made smoother.

The invention discloses an overflow weir and elastic force type stilling pool combined energy dissipation structure and an energy dissipation method. The overflow weir and elastic force type stillingpool combined energy dissipation structure comprises an overflow weir and a stilling pool, the overflow weir comprises a WES straight line section and a WES ogee section, the WES straight line sectionis connected to the WES ogee section, a rotating shaft part is arranged at the joint, a hydraulic jacking device is arranged at the bottom of the tail part of the WES ogee section, the tail part of the WES ogee section of the overflow weir is connected to the stilling pool, the stilling pool comprises a stilling pool head part, a stilling pool middle part and a stilling pool tail part, the tail part of the WES ogee section of the overflow weir is connected to the stilling pool head part, and more than one rubber support is arranged under a base plate of each of the stilling pool head part, the stilling pool middle part and the stilling pool tail part. According to the overflow weir and elastic force type stilling pool combined energy dissipation structure and the energy dissipation method, the ascending height of the hydraulic jacking device is adjusted, so that the height difference between the WES ogee section of the overflow weir and the stilling pool head part can be adjusted, thepurpose of energy dissipation can be achieved, and in the pouring process, the rubber support are arranged under the base plate of each of the stilling pool head part, the stilling pool middle part and the stilling pool tail part, so that energy dissipation can also be carried out.

The invention relates to an aeration structure and energy dissipation method of a vertical face angle and plane angle changing first level transition stair, and belongs to the field of aeration and cavitation reducing of hydraulic structures in hydraulic and hydro-power engineering. The purposes that the negative pressure is cut down and the air cavitation damage degree is reduced due to the factthat the angles of a first level vertical face stair and a plane stair of a WES overflow weir linear segment are changed freely are achieved. Through the optimization of the aspect of the first levelstair of the WES overflow weir linear segment, firstly, the negative pressure on the WES overflow weir linear segment stair is greatly reduced; secondly, the air cavitation damage degree of the WES overflow weir linear segment stair is obviously reduced; and thirdly, the whole flow state of water flow has no larger change under all levels, and it is indicated that the type of angle change does notaffect the normal flood discharge in actual engineering cases under the circumstances of cutting down the negative pressure and the air cavitation damage degree.

The invention discloses a multi-channel aeration facility with a front oblique tail pier. The multi-channel aeration facility is used for eliminating water crowns behind a gate pier of a spillway of hydraulic and hydropower engineering and performing aeration protection on flow surfaces. The multi-channel aeration facility comprises the oblique tail pier and an aeration facility. The oblique tail pier and the aeration facility are arranged behind the gate pier of the spillway, the oblique tail pier is arranged at the tail of the gate pier, the aeration facility is closely connected to the rear of the section side of the oblique tail pier, and the oblique tail pier is completely coincided with an initial section side which is formed by a bottom cavity of the aeration facility. The aeration facility can be selectively in a 'flip bucket and vertical drop' combination modes, a 'flip bucket and aeration groove' combination mode and the like. The multi-channel aeration facility has the advantages that air supply channels can be increased while the water crowns behind the gate pier can be effectively eliminated, a three-dimensional aeration cavity is formed, the bottom cavity and a natural tail cavity of the oblique tail pier can be communicated with each other via the three-dimensional aeration cavity, accordingly, the aeration areas of the inside of the cavities are increased, and the water aeration quantity, an air-water ratio and a flow surface aeration concentration are also correspondingly increased; a multi-channel air feeding effect is favorable for sufficient and uniform all-section aeration, the air speeds of two side ventilation wells are reduced, and an aeration protection function of the aeration facility is further strengthened.

A rotational flow vertical shaft flood discharge tunnel with a staggered table type volute chamber flip bucket comprises a lock chamber inlet, an upper flat section, a volute chamber, a contraction section and a vertical shaft straight section, a flow guide flip bucket is arranged on the inner side wall, close to one side of the tail end of the upper flat section in the water flow direction, of the volute chamber, and the flow guide flip bucket comprises a vertical face and a flow guide arc face intersecting with the vertical face. The rotational flow vertical shaft spillway tunnel further comprises an incoming flow aerator and a rotational flow aerator. The incoming flow aerator is formed by sudden expansion from the tail end, in the water flow direction, of the vertical wall face of the side, close to the flow guide flip bucket, of the upper flat section to the vertical face of the flow guide flip bucket, and the rotational flow aerator is formed by sudden expansion from the tail end, in the water flow direction, of the flow guide arc face of the flow guide flip bucket to the inner side wall of the volute chamber through the vertical face. The method has the effect of improving the cavitation and cavitation erosion resistance of the volute chamber and the inner side wall face of the vertical shaft straight section.

The invention relates to an aerification structure used for a stepped overflow channel, and belongs to the field of stepped overflow dams. The aerification structure used for the stepped overflow channel comprises a main air duct, an upper dispersed air duct, a lower dispersed air duct, a front aerification step and an initial step, wherein the upper dispersed air duct and the lower dispersed airduct which communicate with the main air duct are arranged on the inner side of the front aerification step and the inner side of the initial step correspondingly, and the other end of the upper dispersed air duct and the other end of the lower dispersed air duct communicate with the vertical face of the front aerification step and the vertical face of the initial step correspondingly. According to the aerification structure used for the stepped overflow channel, leaking water in the aerification step and the initial step can be discharged by means of negative pressure, and the internal temperature of concrete can be decreased, so that the surface flatness of efficiency facilities can be improved, and the early-stage strength of the concrete can be improved.

The invention discloses an anti-cavitation facility of a stepped overflow dam. According to the anti-cavitation facility of the stepped overflow dam, a flaring pier is used for increasing the compression capacity on the water flow, the discharged water flow is transversely contracted and vertically stretched, and the discharged water flow is ejected to the downstream. Stranded ejection water tongues aerate and collide with each other in the air, so that energy is dissipated; in addition, a flip bucket arranged at the tail of the flaring pier can lift the discharged water flow away from the overflow surface, an aeration cavity is formed. An anti-cavitation transition step is utilized to mix outside air into the cavity, so that the negative pressure at the junction of the flip bucket and thetransition step is greatly reduced, the aeration concentration in the step is improved, and the possibility of cavitation damage is reduced. The step behind the cavity happens to be the drop point ofthe front edges of the water tongues, and the friction effect of the step on the water flow is utilized to accelerate the dissipation of the step on the discharge energy; after that, a reverse arc section and a stilling basin are utilized for further energy dissipation. The anti-cavitation facility of the stepped overflow dam utilizes a combined flood discharge energy dissipation structure with section partition and region partition, cavitation damage on the overflow dam surface is reduced, and the energy dissipation rate is improved.

The present invention relates to a kind of differential-type aerated deflecting bucket. It includes bucket body, and its characterized by that on the bucket body locally are set several small deflecting buckets, these small cleflecting buckets and said bucket body are identical in the slope-raising point, and the overflowing surfaces fromed from these small deflecting buckets and said bucket body are convexly-concavely alternated. Said invention also provides the working principle of said differential-type aerated deflecting bucket. Said deflecting bucket can effectively raise amount of air entrainment and can effectively protect outlet structure against cavitation erosion.

The invention relates to the technical field of water conservancy facilities and provides an adjustable aeration ecology landscape retaining dam which comprises an upper dam body, a middle dam body and a bottom dam body. The bottom dam body is fixed to a river bed. A height-adjustable supporting device is connected between the upper dam body and the middle dam body, and a height-adjustable supporting device is connected between the middle dam body and the bottom dam body. The height-adjustable supporting devices are electrically connected with a controller. The upper dam body comprises a first flow-passing surface which comprises a first waterways experiment station (WES) weir surface. The middle dam body comprises a second flow-passing surface, and the second flow-passing surface comprises a second WES weir surface and a first reverse curve surface. The bottom dam body comprises a third flow-passing surface, and the third flow-passing surface comprises a third WES weir surface, a first inclined surface, a second reverse curve surface, a first horizontal surface and a third reverse curve surface which are connected in sequence. According to the adjustable aeration ecology landscape retaining dam, the distances between the three dam bodies can be adjusted according to upland water conditions, accordingly the water passing condition is adjusted, and the concentration of air entrained in water is increased.

The invention relates to a form-variable stilling basin front end energy dissipation structure and an energy dissipation method thereof. The form-variable stilling basin front end energy dissipation structure is mainly composed of a WES overflow weir and a stilling basin, wherein the WES overflow weir comprises a curve section of the WES overflow weir, a linear section of the WES overflow weir andan inverted arc section of the WES overflow weir; the stilling basin comprises a stilling basin front end, a stilling basin rear end and other parts. Innovation is conducted mainly aiming to high intensity of pressure of the stilling basin front end, the stilling basin front end is divided into blocks with same size, and accessory hydraulic jacking devices are arranged on the stilling basin bottom plate blocks obtained through dividing respectively; the relative height between each stilling basin bottom plate block and the inverted arc section of the WES overflow weir is adjusted through accessory hydraulic control valves; in order to bring convenience to actual management of engineering, a main hydraulic control valve is installed, and the whole device can be adjusted.

The invention relates to an alveolar-type air-entrained ridge. The purpose of the present invention is to propose a new alveolar-type air-entraining ridge, which can increase the contact area between the water tongue and the cavity, enhance the turbulent mixing effect at the lower edge of the water tongue, and increase the air volume of the ridge , to extend the protective length of the aeration sill, and it can also be used in combination with the aeration tank and the sudden drop. The technical solution of the present invention is: an alveolar-type aerated sill, which is provided with a sill body on the bottom plate of the drainage structure. For ridge and groove ridge, tooth ridge height h1>groove ridge height h2>0. The invention is suitable for aeration and corrosion reduction of drainage structures in water conservancy projects.

The invention provides a pretreatment system of an SCR (selective catalytic reduction) catalyst device. A transition part internally arranged between a DPF (diesel particulate filter) input end and anSCR output end comprises a transition casing and a transition cavity arranged in the transition casing, the transition casing comprises a front transition plate, a rear transition plate and a ring-shaped transition side wall clamped between the front transition plate and the rear transition plate, a front plate inlet and a front plate outlet are formed in the top and bottom of the front transition plate respectively, an ammonia gas generation unit is arranged in the position, close to the front plate inlet, in the transition cavity, and a vertical rectifying unit is arranged in the position,located below the ammonia gas generation unit, in the transition cavity; a horizontal rectifying unit is arranged in the SCR output end, and a urea jet hole communicated with the ammonia gas generation unit is formed in the top of the transition side wall. The design not only is beneficial to ammonia gas generation, but also facilitates increase of uniformity of ammonia gas concentration and flowrate, so that the SCR reaction effect is improved.