1234results about How to "Environmental protection" patented technology

The invention discloses a method for recycling nickel, cobalt and manganese synchronously from a sulfuric acid leaching solution containing waste residues of nickel, cobalt and manganese. The method comprises the steps of firstly, removing iron and aluminum from the leaching solution through an oxidation and precipitation method; then, removing the element copper through extraction; then, extracting zinc; and finally, extracting nickel, cobalt and manganese synchronously with tributyl phosphate and saponified neodecanoic acid. By means of the method, nickel, cobalt and manganese in the leaching solution containing the waste residues of nickel, cobalt and manganese can be extracted and recycled synchronously; calcium and magnesium in a raw solution cannot exert an influence on the extraction process; separation cost for recycling the elements nickel, cobalt and manganese separately is lowered; and raw material cost for preparing a nickel-cobalt-manganese-salt ternary battery material is lowered.

The invention provides a solid biochemical paraffin prevention block for an oil well and a preparation method thereof, relating to a composition for treating organic deposits in holes or wells and a preparation method thereof. By using the solid biochemical paraffin prevention block for the oil well, the paraffin prevention period of the oil well can be effectively prolonged, and the output of the oil well can be improved; the operation process is simple; the solid biochemical paraffin prevention block is convenient, safe and environment-friendly in use, does not pollute crude oil, and is a long-lasting solid paraffin prevention agent; the unqualified products generated in the production process can be re-processed, thus no waste is generated in the production process, and the environment can not be influenced; and the product has a paraffin prevention rate not less than 75% and a paraffin prevention effective period not less than 240 days.

The invention relates to a water-based zinc-manganese single flow battery; a positive electrode active material is an oxide of manganese, a metal composite oxide, a metal oxide or a carbon material, a negative electrode is a zinc electrode, an electrolyte solution is a nearly neutral aqueous solution containing a zinc salt and a manganese salt, positive electrode active ions and negative electrode active ions can coexist in one electrolyte solution, and an ion exchange membrane is not required for separating the positive electrode and the negative electrode; in processes of charging and discharging, the electrolyte solution constantly flows between an electrolyte solution storage tank and an electric pile through a pipeline under pushing of a liquid pump. During charging, zinc ions are deposited onto a negative electrode current collector from the electrolyte solution, the zinc ions and manganese ions are co-embedded into the positive electrode active substance at the same time, and the manganese ions are subjected to oxidation deposition; during discharging, the negative electrode deposited zinc is dissolved into the electrolyte solution, and the positive electrode manganese oxide is partially reduced and dissolved and is extricated to the electrolyte solution with the zinc ions simultaneously. The battery has the outstanding characteristics of simple manufacture, relatively high specific energy and specific power, low cost, long cycle life, environmental friendly and the like, and is widely applied in electric power, transportation, electronics and other fields.

The invention discloses a preparation process of an alkali-polishing efficient PERC battery. The preparation process comprises the following steps: step S01, texturing; step S02, diffusing; step S03,SE process; step S04, thermal oxidation; step S05, removing PSG; step S06, alkali-polishing; step S07, annealing; step S08, back passivating; step S09, back film; step S10, front film; step S11, laserslotting; and step S12, printing and sintering: accomplishing the back printing and the back printing through silk-screen printing, and then performing sintering process; step S13, electric injection: electric injection: through a light attenuation furnace or an electric injection furnace; and step S14, testing and sorting: performing battery testing and sorting on the cell. The invention furtherdiscloses an alkali-polishing efficient PERC battery. By adding the high-temperature thermal oxidation process flow after the SE, a layer of silicon dioxide protection layer is grown at the front SEregion at high temperature, a pyramid textured surface of the SE region is effectively protected, and the process flow can guarantee that the stable and continuous production of the SE alkali-polishedPERC battery.

The invention discloses a methanol gasoline and a preparation method thereof, relating to the field of new energy. The methanol gasoline comprises 15-30wt% of methanol, 67-83wt% of gasoline and 2-3wt% of additive. The preparation method comprises the following steps: pouring solubilizer, energy increasing and consumption reducing agent, anti-oxidant, metal corrosion inhibitor, rubber swelling inhibitor into a reaction vessel according to a required proportion with stirring, mixing uniformly to obtain an additive; mixing the additive with methanol according to a required proportion to obtain modified methanol; and mixing the modified methanol with gasoline according to a required proportion to obtain the methanol gasoline. The methanol gasoline disclosed in the invention has the advantagesof simple preparation and good performance, can be used mixed with a national standard gasoline in any proportion with similar energy consumption with the national standard gasoline and emission indexes that conforms to requirements of environmental protection, and can be widely used for various petrol-engined motor vehicles, such as car, carriage, fork truck, power-assisted vehicle, farm vehicle, motorcycle, load wagon and forklift.

The invention discloses an intelligent home gateway. The intelligent home gateway comprises a communication module and a control module. A customized and dedicated IC is adopted for the control module, a Java processor and standard and compatible hardware are embedded in the control module, a terminal and a host calculator are made to be fast connected through a TCP / IP protocol and an Ethernet, and by changing software, different functions can be achieved with the same hardware. The invention further discloses a community management system. The community management system comprises a plurality of terminal devices, a plurality of intelligent home gateways and a community management platform, wherein the community management platform is used for managing the intelligent home gateways. Through the technical scheme, multiple homes and even the whole community can be intelligently managed internally and externally, an intelligent lifestyle with homes as units and the community as the platform is achieved, and life is made easier, more convenient, comfortable, economical, environmentally friendly, safe and efficient.

The invention relates to an aqueous two-phase separation method for total flavonoids, saponins and polysaccharides in astragalus. The method comprises the following steps of smashing an astragalus medicinal material; adding a solvent and performing solid-liquid extraction; filtering and removing impurities to obtain crude extract of the total flavonoids and the saponins of the astragalus; taking and concentrating the crude extract of the astragalus; adding an aqueous two-phase system formed by absolute ethyl alcohol / dipotassium hydrogen phosphate, adding water to make the total amount of the system be a constant value; mixing uniformly and standing, wherein the aqueous two-phase system is divided into an upper phase and a lower phase; taking an ethanol phase which contains a large amount of total flavonoids and saponins of the astragalus out; and concentrating the ethanol phase under a reduced pressure to obtain the extract of the total flavonoids of the astragalus. The method has the beneficial effects that the extraction rate of the total flavonoids and the total saponins of the astragalus; simultaneously the total flavonoids and the total saponins can be separated from the polysaccharides of the astragalus in the crude extract; the used solvent is low in toxicity, favorable to environment friendliness and low in cost; the inactivation or the denaturation of the flavonoids and the saponins of the astragalus cannot be caused; the phase separation time is short; the interfacial tension is low; and residual organic solvent does not exist.

The invention belongs to the technical field of waste treatment, and in particular to a method for recycling kitchen waste. The method for recycling kitchen waste provided by the invention comprises the following steps: kitchen waste pretreatment, crushing, solid-liquid separation, oil-water separation, biogas preparation and biogas residue separation. The method provided by the invention is reasonably and regularly designed, and not only can conduct effective and environment-friendly treatment on kitchen waste, but also can produce methane, recover oil and obtain by-products, such as organic fertilizer and feed in the treatment process; besides, the method realizes resource utilization of kitchen waste, and has significant economic benefits.

The invention relates to the technical fields of color master batches and preparing technologies thereof, in particular to a preparing technology for color master batches, and particularly discloses a preparing technology for color master batches for high-speed spinning fibers. The preparing technology includes the steps of carrier grinding, coloring material grinding, matched material grinding, assistant grinding, mixed grinding, high-speed grinding, extrusion prilling and drying. The color master batches prepared with the technology can be easily mixed with PET product plastic, and the even coloring effect can be achieved. Dispersibility, coloring strength and covering power are improved, weather resistance, acid resistance, heat resistance and cold resistance are achieved, the chemical stability of pigment is kept, and the color master batches are more environmentally friendly and healthier in the use process.

The invention discloses a carcass innocent treatment method. The method comprises the following steps: low-temperature freezing, crushing, high-temperature decomposition, solid-liquid separation, sterilization and drying. The carcass innocent treatment method disclosed by the invention has the advantages that the treatment is thorough and environment-friendly, and the recycling of resources is achieved, so that the defect of conventional treatment without utilization is overcome by decentralized collection, centralized treatment, cleaning treatment and recycling, and the advantages of being ecological, environment-friendly, pollution-free and recycling are achieved.

The invention discloses a method for improving compactness of aluminum alloy micro-arc oxide coating, and belongs to the technical field of aluminum alloy surface modification. The method comprises the following steps of: grinding an aluminum alloy sample to be smooth, ultrasonically cleaning the aluminum alloy sample, putting the ultrasonically-cleaned aluminum alloy sample into electrolyte to perform micro-arc oxidization treatment, thereby preparing an aluminum-alloy micro-arc oxidation coating; and finally, performing laser scanning processing on the aluminum-alloy micro-arc oxidation coating by high-energy laser beams generated by laser unit equipment. The method disclosed by the invention can improve the structure of the aluminum-alloy micro-arc oxidation coating, so that a metastable phase in the coating is converted into a stable phase. The method effectively improves the problems that compaction of the coating is relatively poor as a result of porous characteristics, and the energy consumption for obtaining the micro-arc oxidation coating with good compactness is high, so that corrosion and wear resistance of the micro-arc oxidization coating is greatly improved; and moreover, the method is simple in process, is good in repeatability, and can be used for industrial large-area preparation.

The invention relates to a dynamically vulcanized styrene thermoplastic elastomer and a preparation method thereof. The elastomer consists of the following components in percentage by weight: 20 to 70 percent of styrene segmented copolymer, 10 to 60 percent of rubber processing oil, 5 to 60 percent of polyolefin, 0 to 35 percent of inorganic mineral filler, 0.1 to 0.3 percent of antioxidant, 0.1 to 1 percent of crosslinking agent and 0.05 to 0.5 percent of auxiliary crosslinking agent. Compared with the prior art, the preparation technique of the invention is reasonable, the prepared elastomer has excellent comprehensive properties, the mechanical property, compression set resistance, abrasive resistance and the like of the elastomer are remarkably enhanced, meanwhile, the elastomer almost does not have residual smell, use is safe and environment-friendly, and the elastomer can be widely applied to the interior and the exterior decorations and other parts of automobiles and other more fields.

The invention relates to an ultra-low apparent density and high-performance foam concrete material and its preparation method. The material comprises the following components by mass: 30%-70% of cement, 0%-30% of an admixture, 0%-30% of a porous particle aggregate, 0.3%-5% of a polymer, 0.3%-3% of a fiber, 0.3%-0.5% of a foaming agent, 0.1%-0.5% of a water reducing agent, 0%-1.5% of an early strength agent, 0.1%-0.5% of a shrinkage reducing agent, 0%-3% of a layered material, and 26%-50% of water. Compared with ordinary foam concrete, the material prepared in the invention has the technical advantages of ultra-low apparent density, small coefficient of heat conductivity, and no dry shrinkage cracking, etc. And compared with current foam polyphenyl boards for exterior wall external thermalinsulation, the material of the invention has the advantage of non-combustion.

A method for comprehensively treating low-concentration ammonia-nitrogen wastewater by completely recycling is disclosed. The low-concentration ammonia-nitrogen wastewater and carbide slag or quick lime are mixed and reacted to obtain a mixed solution containing ammonia water and ammonium chloride. The mixed solution is transferred into an ammonia-water evaporative concentration tower to separate the ammonia water and thus obtain an ammonia vapor and a calcium chloride waste solution. The ammonia vapor is transferred into an ammonia-water cooler, and the calcium chloride waste solution is introduced into an aging pool for aging, and then filtered to obtain a purified calcium chloride solution; and the purified calcium chloride solution is introduced into an MVR triple-effect evaporator for evaporation, so as to obtain distilled water and a concentrated calcium chloride solution. The concentrated calcium chloride solution is introduced into a fluidized bed for spray granulation, so as to obtain an anhydrous calcium chloride product.

The invention discloses a gas water heater. The gas water heater comprises a pre-mixing cavity shell, a combustor, a heat exchanger, a pre-heating disc and controller; a mixing cavity is limited in the pre-mixing cavity shell, and the pre-mixing cavity shell is provided with a gas inlet, an air inlet and a mixed gas outlet which are communicated with the mixing cavity; the combustor is communicated with the mixed gas outlet, and a catalyst for catalyzing the combustor to carry out smokeless catalytic combustion is arranged in the combustor; the heat exchanger is connected with the combustor so as to absorb heat generated by combusting of the combustor and is provided with a water inlet and a water outlet; the pre-heating disc is connected with the combustor so as to preheat the combustor; and the controller is connected with the pre-heating disc so as to control heating temperature of the pre-heating disc. According to the gas water heater, the reaction rate of fuel can be improved, the utilization rate of the fuel is improved, generation of harmful gas can be avoided, the fuel can be subject to flameless catalytic combustion in the combustor, generation of the harmful gas is greatly reduced, and use is safe and environment-friendly.

An environmental-friendly composite filament artificial leather includes a composite filament textile and an elastomer film. The composite filament textile is made of composite filament. The composite filament includes at least one core portion and a sheath portion. The at least one core portion is a polyester-type polymer, a polyamide polymer or a polypropylene polymer. The sheath portion sheathes the at least one core portion, and the sheath portion is a thermoplastic elastomer. The elastomer film is bonded with the composite filament textile. The elastomer film is made of one selected from the following materials: thermoplastic polyurethane (TPU), thermoplastic polyester elastomer (TPEE) and thermoplastic polyolefin (TPO). By this way, an environment-friendly artificial leather of lightweight, good abrasion, good touch feeling and well dimentional stability can be manufactured. Furthermore, the artificial leather can be manufactured without use of any solvent, so as to conform to the environment protection requirement.

The invention discloses a method for recovering valuable metal from red soil nickel minerals comprehensively. At present, because the red soil nickel minerals are treated by a wet method, and water contained in mineral aggregates which enter a leaching system is not controlled effectively, the water content of the mineral aggregates which enter the system is about 70 percent, the concentration ofnickel ions in a leachate of the system in a nickel precipitation process cannot be enriched and is low due to large total amount of the water, and the volume of water which is needed to be treated in the system is large and the treatment cost is high. The method comprises a mineral aggregate preparation section, a leaching extraction deironing section, a chromium recovery section, a nickel precipitation section and a magnesium recovery section which are performed sequentially, and is characterized in that leaching reaction is performed under a sulfuric acid system, and the total quantity of waste water and waste residues of the system is reduced by a series of measures to improve the recovery rate of the valuable metal; and a large number of production auxiliary materials are used in theproduction process, and are recycled, so that the production cost is reduced substantially.

The invention relates to an electric breathing mask. A circle of sponge outer edge is fixed under an air chamber main body; a main ring is arranged on the air chamber main body; an outer open ring is arranged outside the main ring and is sleeved with a matched inner open collar; a battery box is fixed on the inner open collar; a circular cavity is fixed on a screw thread in the main ring; a motor is installed in the middle of the lower end of the circular cavity; an electric fan is installed at the upper end of the circular cavity; a small hole in the middle of the electric fan is fixed in a rotor shaft of the motor; a dust filtering box is fixed at the upper end of the circular cavity; dust filtering cloth and dust filtering sponge are installed in the dust filtering box; a dust filtering box cover covers the dust filtering box; an air outlet valve is also installed on the air chamber main body; and an air outlet valve piece is installed on the air outlet valve. The electric breathing mask can make people feel easy and comfortable during breathing, and has more inspiratory volume than an ordinary mask.

The invention relates to the technical field of plastic coloration, and in particular to the technical field of high-speed textile fiber coloration, and discloses a color masterbatch formula, which is prepared from the following components in parts by weight: 20 to 50 parts of polyethylene terephthalate, 5 to 30 parts of toner, 5 to 25 parts of dispersing agent, 1 to 8 parts of heat stabilizer, 1 to 8 parts of antibacterial agent, 1 to 8 parts of antioxidant and 1 to 5 parts of additive. Compared with an existing color masterbatch, the color masterbatch disclosed by the invention can be easily mixed with a PET (polyethylene terephthalate) plastic product, so as to achieve an effect of even coloration. Not only the dispersity, the tinting strength, the covering power are improved, but also the properties of weather resistance, acid resistance, heat resistance and cold resistance are attained, and the chemical stability of a pigment is maintained.

The invention discloses natural osmanthus fragrans fragrant tea seed oil and a preparation method thereof. The preparation method comprises the steps: firstly, respectively filling water, fresh osmanthus fragrans flowers and tea seed powder into a bottom layer, a middle layer and an upper layer of a steam cooker; secondly, raising the temperature by heating to enable the bottom layer to generate vapor, introducing the vapor into the fresh osmanthus fragrans flowers at the middle layer, enabling the vapor to penetrate through the osmanthus fragrans layer and enter the tea seed powder, and enabling the tea seed powder to fully absorb osmanthus fragrans fragrance to obtain osmanthus fragrans fragrant tea seed powder; thirdly, mixing the osmanthus fragrans fragrant tea seed powder and dry osmanthus fragrans flowers, and squeezing a mixture to obtain crude osmanthus fragrans fragrant tea seed oil; fourthly, pouring the crude osmanthus fragrans fragrant tea seed oil into a stainless steel barrel which contains the dry osmanthus fragrans flowers with a proper amount, sealing, and storing at low temperature; fifthly, filtering to obtain a natural osmanthus fragrans fragrant tea seed oil product. The fragrance of the natural osmanthus fragrans fragrant tea seed oil product is mixed by strong natural osmanthus fragrans fragrance and light natural tea seed oil fragrance. The natural osmanthus fragrans fragrant tea seed oil is simple in the process, is green, is environment-friendly and has the actions of refreshing the brain, raising up the spirit, tenderizing the skin, delaying senescence and the like; the quality and the taste of the natural osmanthus fragrans fragrant tea seed oil are obviously superior to those of ordinary tea oil.

The invention relates to a heating device which comprises a heating furnace and at least one heat exchange compression box connected with the heating furnace. The heating device is characterized in that an air inlet pipe and an exhaust pipe are arranged in the heat exchange compression box, one end of the air inlet pipe is connected with the heating furnace, the other end is communicated with theexhaust pipe through at least three rows of S-shaped and at least three layers of S-shaped heat exchange pipes, the air inlet pipe is continuously bent like V, a dust collection chamber is arranged at the tail end of the lower part of each V-shaped bending part, and a water circulation cooling system is arranged in the dust collection chambers and the heating furnace. The heating device can effectively settle dust in the air, avoid pipelines from being blocked by the dust, improve the combustion heat value, prolong the service life of the device and realize the significant effects of environmental protection and energy conservation.

The invention discloses an impeller full-automatic washing machine comprising an external barrel, an internal barrel disposed in the external barrel and an impeller disposed in the internal barrel. A drainage port is arranged on the bottom of the external barrel; the washing machine does not have a draining valve; the drainage port of the external barrel is directly communicated with a drain pipe; during washing and rinsing, washing water is only accommodated in the internal barrel and the external barrel contains no washing water; during dehydration, the washing water passes through the external barrel, the external barrel drainage port and the drain pipe from the upper part of the internal barrel and then is directly discharged; during water inlet, water is only charged into the internal barrel; after washing is finished, the internal barrel is driven to rotate at high speed to produce centrifugal force; water in the internal barrel and water in the clothes spirally rise and are discharged out of the external barrel via water discharging holes of the internal barrel; and the water can be directly discharged via the drain pipe. Without the draining valve, assembling technology of the external barrel components can be reduced, installation space of a barrel bottom driving device can be increased and cost can be reduced.

The invention relates to an oil-electricity hybrid power walking type aloft working platform. The oil-electricity hybrid power walking type aloft working platform comprises a frame, a rotary working platform arranged on the frame and a fixed arm arranged on the rotary working platform, wherein the fixed arm is provided with a hoisting mechanism; the hoisting mechanism comprises a lower arm, an upper arm and lower arm connection piece, an upper arm and a small arm; one end of the lower arm is hinged to the fixed arm and the other end of the lower arm is hinged to the upper arm and lower arm connection piece by a lower arm connection pin; the other end of the upper arm and lower arm connection piece is hinged to one end of the upper arm by an upper arm connection pin; the upper arm sleeves an upper retractable arm; the upper retractable arm is hinged to one end of the small arm by a pin; the other end of the small pin is hinged to a working bucket by a pin. The oil-electricity hybrid power walking type aloft working platform has the advantages of reasonable structure design, convenience for transportation, cleanness and environmental friendliness; noise pollution is reduced, the production cost is saved, the working span and height can be increased and energy sources are saved.

The composite modifying catalyst for alcohol-ether fuel is compounded with zinc peroxide 5-15 weigh portions, dimethyl carbonate 15-35 weigh portions, vat yellow GCN 5-15 weigh portions, cyclohexylamine 3-10 weigh portions, and isooctyl nitrate 15-30 weigh portions, and through mixing at normal temperature. The alcohol-ether fuel with the composite modifying catalyst may have great methanol adding ratio while ensuring the combustion efficiency, fuel consumption, dynamic performance and other indexes.

The invention discloses a method for recovering copper from copper dust and immobilizing arsenic from copper dust into scorodite. The method comprises the following steps: subjecting the copper dust to acid leaching under the conditions that a sulfuric acid concentration is 14 to 30 g / L and reaction time is 2 to 3 h so as to obtain acidic leaching liquid; carrying out oxygen-pressure arsenic precipitation on acidic leaching liquid under the conditions that oxygen partial pressure is 0.6 to 1.3 MPa and reaction time is 2 to 3 h so as to obtain scorodite and a post-arsenic-precipitation solution; and adding iron powder into the post-arsenic-precipitation solution and carrying out a reaction for 25 to 40 min so as to displace copper slag and obtain post-displacement liquid. The method provided by the invention carries out oxidative arsenic precipitation at a high temperature, so sulfuric acid in waste acidic leaching liquid is made full use of; a high arsenic removal rate is realized, eventually produced iron arsenate has stable properties, and the post-arsenic-precipitation solution has low arsenic content; and the method has the advantages of high heavy metal recovery rate, low recovery cost, environment-friendly treatment process and small pollution to the environment.

The invention relates to a metallographic corrosive for super austenitic stainless steel and a corrosion method. The corrosive is prepared from the following components: 2-10 weight parts of oxalic acid, 80-150 volume parts of concentrated hydrochloric acid and 0-50 volume parts of deionized water. The corrosion method comprises the following steps: S1, uniformly adding oxalic acid, deionized water and concentrated hydrochloric acid according to a ratio, uniformly stirring, and standing for an hour or longer; S2, preparing a metallographic specimen; and S3, taking the metallographic specimen as an anode, taking a highly corrosive metal material as a cathode, immersing into a corrosive, electrifying and corroding; and immediately taking out and cleaning the metal material after corrosion completion, and blowing. The corrosive disclosed by the invention is simple in composition, easy to prepare and recover, safe, environmental-friendly, capable of being repeatedly utilized and cost-saving; the corrosion method is easy to operate, accurately controllable, stable, high-efficiency and excellent in reproducibility; and the corroded specimen is clean, neat, clear and uniform in metallographic structure and excellent in corrosive effect. The metallographic corrosive disclosed by the invention is applicable to metallurgical structure analysis of multiple states such as various super austenitic stainless steel cast conditions, hot working, ageing, heat treatment, welded and the like, a one-dosage multi-purpose effect is achieved, and time and labor can be saved.

The invention discloses a plant wound protection patch and a preparation method thereof, and aims at providing a plant wound protection patch and a preparation method thereof, wherein the plant wound protection patch has the advantages that the plant wound protection patch can be directly attached onto a plant wound, the immune system of trees is activated, the metabolism is enhanced, the stress resistance of the trees is improved, the patch can be used for sterilization and disinfection, the water loss is prevented, the wound healing is promoted and the use is convenient. The protection patch is formed by mounting materials and plant healing ointment. The plant healing ointment is formed by the following components by weight percent: 20-60 percent of soybean oil, 10-30 parts of polybutylene, 1.2-5 percent of thiophanate methyl, 10-30 percent of asbestos and 10-33 percent of titanium dioxide. The plant wound protection patch can be directly attached onto the plant wound, an area which is isolated from an external germ living environment or can destroy the germ living environment is formed, the wound healing is promoted, the use is convenient, the effectiveness is high and the environment is protected.

The invention relates to a floor drain, in particular to a floor drain for a water seepage prevention toilet, which belongs to the technical field of floor drain structures. The water seepage prevention floor drain comprises a floor drain body 1, a sealing bowl 2 inside the floor drain body 1, and a floor drain cover 3 on the upper part, and is characterized in that the periphery of the floor drain body 1 is provided with a circle of water seal ring 4 surrounding the floor drain and extending out horizontally; and the drain floor is provided with drain openings 5 evenly above the water seal ring 4 and along the periphery of the floor drain body 1. The water seepage prevention floor drain is provided with the water seal ring on the basis of the prior floor drain to further strengthen the waterproof effect, effectively prevent water seepage of a waterproof layer and perform conduction drainage aiming at the water seepage, and is environment-friendly to use and convenient to mount.

A portable folding roaster comprises: a heating box, having a baffle disposed therein and a partition disposed at the bottom thereof, a heat source being disposed between the baffle and the partition, and the baffle having small apertures arranged on the surface thereof for facilitating heat dissipation; a folding leg stand, having a base there over for fixing the heating box, the base having a plurality of supporting legs pivoted there below such that the supporting legs may be opened or closed with respect to the base; and a roasting tool, disposed on the heating box, and being used for holding food materials.