55results about How to "Good running cost" patented technology

The invention includes following subsystems and procedures: smoke-dust monitoring subsystem for monitoring concentration of smoke-dust in real time; subsystem of monitoring parameters of fume emission in use for detecting parameters including oxygen content, flow rate, pressure, and temperature in real time; subsystem of monitoring gaseous pollutant in use for sampling and controlling fume to carry out pretreatment; system control and data acquisition process subsystem in use for collecting signals output from the said subsystems, carrying out processing, storing, displaying, recording and statistical operations to implement transferring data in real time remotely; communication between program controlled pretreatment for fume and computer in central station of monitoring environmental protection. Using modern techniques such as sensor, detection, computer, network etc, the invention possesses advantages of high automation, good stability, quick processing and low operating cost.

The invention provides a method for desulfurating and denitrating and recovering sulfur resource in a closed cycle way, comprising the following steps: 1, dedusting; 2, desulfurating and denitrating; and 3, recovering sulfur resource. The method can effectively solves the problems of the prior art such as difficult treatment of secondary products, secondary pollution, high working cost, single product and the like. According to market requirement, analysis reduction regeneration of desulfurated secondary products is fully utilized, aiming at treating waste with waste to serve multiple purposes, recovering the wasted sulfur resource in flue gas of fire coal with the lowest cost, improving the comprehensive added value of desulfurated secondary products and reducing working cost thereof, dedusting, desulfurating and denitrating, and recovering sulfur resource to realize long-term efficient working, self-sufficient closed cycle, resources and energy conservation, low energy consumption, and no waste water discharge and secondary pollution, thereby meeting the requirements of resource recovery and environmental management, and improving economic benefit and social benefit for enterprises.

The invention relates to a quick laser cladding device of flat metal parts. The quick laser cladding device comprises five modules, namely an electrostatic powder spraying device, a quick laser galvanometer scanning device, a gas protection module, a parts conveying module, and a parts fixing clamp. The quick laser cladding device has the advantages of low equipment building and operating costs, fast powder adding method, fast cladding speed, good cladding layer surface quality, accurate and controllable cladding layer thickness and the like. According to the quick laser cladding device, the system building and operating costs are reduced, the production efficiency is improved, and good cladding quality is also obtained. By adopting the method, the requirements of cladding the flat metal parts at low cost, large batch, high speed and high quality can be met.

The invention relates to a semi-hydrated-two-hydrated method wet process phosphoric acid production process and a system thereof, which solve the problems of high investment, small device scale, high energy consumption, low device operation rate and low raw material yield of the existing processing process. The technical solution comprises: performing semi-hydrated reaction and filtering by taking phosphorite as a raw material to obtain a product phosphoric acid and semi-hydrated gypsum, and then performing two-hydrated reaction and filtering on the semi-hydrated gypsum to obtain water-hydrated dry gypsum. The system comprises a semi-hydrated reaction and filtering system and a two-hydrated reaction and filtering system. The process is reliable, product phosphoric acid concentration is high, quality of side products fluosilicic acid and dry gypsum is good, energy consumption is low, equipment investment and operation cost are low, and environment friendliness and continuous stable large-scale production (more than or equal to 0.3 million tons / year) are realized.

This invention relates to the improvement of a rundle of a cabling machine including a platform, a cabling doubling die carrier set on it, a guide wheel set on one side of the die carrier and a frame set under it matched with the central shaft of the cabling disk characterizing that the axle wire of the shaft is vertical to the level, several cable paying out frames are set on the disk vertical to the axle wire of the disk shaft and the cable dial matched to the cable disk and several big riding wheel frames are set under the cable disk with big riding wheels on them advantaged that: long cabling at one run: it is prolonged from 1km at the present to 15km, the design of the torsion back device is reasonable and the cabling wires are turned back synchronously.

The invention provides a novel method for producing beta-polymalic acid by the solid-state fermentation of microorganisms, and relates to a novel process of producing the beta-polymalic acid by using an inert adsorption composite material to the solid-state fermentation of aureobacidium pullulans(at present, the strain is stored in the general microorganism center of China Committee for Culture Collection of Microorganisms, and the CGMCC No. is 3337.). The method comprises the following steps of: selecting a nontoxic inert support which is good in physical water absorption and stable in nature and has a porous structure, evenly mixing the inert support and a liquid culture medium inoculated with the aureobacidium pullulans in a certain ratio, sending the mixture to a solid-state reactor for fermentation, extracting a substrate after the solid-state fermentation with water, and inspecting the content of the polymalic acid. By the method, the fermentation efficiency of the polymalic acid is improved, and the transfer efficiency of oxygen in the fermentation process is enhanced; at the same time, because the inert support can be recycled, the discharge of the solid wastes is greatly reduced; the utilization ratio of the fermentation equipment is high, the fermentation period is short, the products are easy to be separated and extracted, and the yield and purity of the polymalic acid are improved; and the operating cost is low, the economic benefits are obvious, and the industrialized production is facilitated.

The present invention discloses a counter flow type vertical flow artificial wetland system, which comprises a downward flow artificial wetland unit and an upward flow artificial wetland unit, wherein the downward flow artificial wetland unit and the upward flow artificial wetland unit are respectively provided with a composite filler bed, the top of the downward flow artificial wetland unit is provided with a water inlet pipe and a water distribution region, the top of the upward flow artificial wetland unit is provided with a water collection region and a water outlet pipe, the bottoms of the downward flow artificial wetland unit and the upward flow artificial wetland unit are connected through a connection pipe, fillers in the composite filler bed of the downward flow artificial wetland unit are sequentially gravel, zeolite and cobbles from top to bottom, and fillers in the composite filler bed of the upward flow artificial wetland unit are sequentially cobbles added with rice husk, steel slag and limestone from bottom to top. With the counter flow type vertical flow artificial wetland system, a deep treatment can be performed on the existing secondary wastewater treatment plant; a structure is simple; management is convenient; clogging is not easily generated; operation cost is low; a nitrogen and phosphorus removal effect is good; artificial wetland sewage treatment effect enhancement can be achieved; and water quality of secondary effluent of the city sewage treatment plant can be improved.

The invention provides a physicochemical and biochemical combined treatment method of fracturing backflow liquid. The physicochemical and biochemical combined treatment method comprises the following steps of: (1) introducing the fracturing backflow liquid into a regulating sedimentation tank, and controlling the pH value of the fracturing backflow liquid to 6-8, wherein the hydraulic retention time of the fracturing backflow liquid is 2-4 hours in the regulating sedimentation tank; (2) introducing a supernatant from the regulating sedimentation tank into a coagulation sedimentation tank, adding a polyaluminium chloride water solution and a polyacrylamide water solution to the coagulation sedimentation tank, depositing to remove suspended particles out of waste water inside the coagulation sedimentation tank, introducing the supernatant from the coagulation sedimentation tank into an intermediate tank, and regulating the CODconcentration of the waste water inside the intermediate tank to 800-1200mg / L; (3) treating the waste water from the intermediate tank into an aerobic fluidized bed membrane bioreactor in which biological membrane culture is completed, wherein the aerobic fluidized bed membrane bioreactor operates in a way of a continuous water feeding and continuous drainage under the condition of aeration, and the treated waste water is discharged after passing through the membrane assembly of the aerobic fluidized bed membrane bioreactor.

The invention discloses a combined type column floating selection system and belongs to the technical field of mineral floating selection. The system comprises three mineralization manners including adverse flow, rotational flow and jetting flow; the three mineralization manners can be independently used in parallel aiming at the diversity of mineral types and the complicated variability of physical characteristics, and two or three mineralization manners are combined in series to be used. When the three mineralization manners are used in parallel, a unit floating selection testing method is adopted, and a continuous floating selection testing method is adopted when the three mineralization manners are combined in series to be used; air bubbles in an adverse flow floating selection process are generated by feeding micro-pore ceramic through an air compressor; in the rotational flow and jetting flow processes, the air bubbles are generated by a self-suction type micro-bubble generator; mineral pulp, foam washing water and medicaments in the floating selection system are automatically fed through a pump and the floating selection system is measureable and adjustable. According to the combined type column floating selection system, a plurality of sorting manners are selected according to free combination of mineral physical characteristics, and the economic values of minerals are expressed to the greatest extent. The combined type column floating selection system has a simple structure, is convenient to operate and easy to control, has good reliability and low operation cost.

The invention discloses a treatment method of copper-containing high-salt printing and dyeing waste water. The treatment method specifically comprises the following steps: S1, grading pretreatment ofall strands of waste water is firstly done well, and the waste water is divided into a plurality of strands; S2, comprehensive production waste water entering a regulating tank regulates the pH (Potential of hydrogen) of the waste water to 2.5-3.5; S3, discharged water of a coagulative precipitation tank, initial rainwater, other low-concentration waste water and domestic sewage in a comprehensiveregulating tank fully homogenize the water quality. The invention relates to the technical field of treatment of the printing and dyeing waste water. The treatment method of the copper-containing high-salt printing and dyeing waste water has the beneficial effects that sewage-cleaning flow division for the high-concentration and low-concentration waste water can be realized, not only is the dosage of an agent reduced and COD (Chemical oxygen demand) effectively removed, but also the biological toxicity of the waste water is reduced, the biodegradability of the waste water is improved, the load of subsequent biochemical treatment is relieved, the operating stability of a biochemical treatment system is enhanced, and all indexes of the treated waste water can meet corresponding standards; the treatment method has the advantages of economy, high efficiency, stable running, simple operation and high automation degree.

An integrated energy-saving air cleaner comprises a barrel body, an air inlet, an air outlet, at least two filters, namely, a fine filter, a primary filter and a draught fan. The draught fan and the two filters are installed at the communicated position inside the barrel body in a sealing mode, the air inlet and the air outlet are connected with the barrel body, and the primary filter is installed at the end close to the air inlet. An ultraviolet catalyzing air filter is placed inside an inner barrel component, and comprises a nanometer carrier honeycomb ceramic sheet and an ultraviolet lamp. The integrated energy-saving air cleaner is a scheme especially provided for reducing the PM2.5 index and improving the quality of the air in a family environment and a working environment. The integrated energy-saving air cleaner is widely applied in hospitals, and is low in operation cost and equipment plan cost and convenient to popularize.

The invention relates to a special device for treating chaff mixture, which is simple in structure, simple in material separating technology, high in separating efficiency, excellent in separating effect, low in manufacturing cost, environment-friendly, stable and reliable in system operation, and convenient and fast. The special device for treating the chaff mixture comprises a processing system and a separating system, and is characterized in that the separating system comprises a separator, wherein the separator comprises an irregular-shaped separating chamber; the irregular-shaped separating chamber comprises an input flow channel, a collecting flow channel, and a recycling flow channel.

The invention discloses a novel electrochemical treatment device for wastewater treatment and a wastewater treatment method. The electrochemical treatment device includes a high-frequency pulse power supply, electrochemical reaction units, a gas filling unit, a first agent-feeding unit, a second agent-feeding unit and a first auxiliary oxidation reaction unit; each electrochemical reaction unit comprises a reactor shell body, a negative electrode and a positive electrode, wherein the negative electrode and the positive electrode are arranged inside the reactor shell body; the high-frequency pulse power supply is connected with the negative electrodes and the positive electrodes; an electrochemical reaction cavity for accommodating wastewater is formed inside each reactor shell body; therefore, under the action of the current provided by the high-frequency pulse power supply and with the synergistic effect of the gas filling unit, the first agent-feeding unit, the second agent-feeding unit and the first auxiliary oxidation reaction unit, the wastewater undergoes electric flocculation, electric catalytic oxidation, electric gas floatation, electrolysis, ionization and other effects in the electrochemical reaction units, and pollutants in the wastewater are effectively removed; and the electrochemical treatment device has the advantages of relatively low energy consumption, good treatment effect, high degree of automation, good hygiene conditions of an operation environment and low running cost.

The invention relates to an intermediate-temperature drying method and device for a biological film of garbage, and aims at solving the problems of low drying efficiency of an existing garbage treatment biological film drying method and negative effects caused by the treatment process on the environment. The method comprises the following steps: a, crushing the garbage; b, stowing the garbage, and covering with the film; c, bio-drying, namely, intermittently blowing air, and maintaining for 14-16 day, wherein the air blowing-in / air stopping time ratio of an air blower is 1: 5-1: 4; slowly increasing ventilating until the final air blowing-in / air stopping time ratio of the air blower is 1: 1.2-1: 0.8, wherein the temperature of a garbage pile is kept between 20-72 DEG C, and the oxygen content is kept between 2-8mg / L; and d, removing the garbage, namely, removing the garbage from a bio-drying bin. The invention also discloses the drying device for the abovementioned method. With the adoption of the method and the device, the temperature in the biological film drying process is increased; the calorific value of the dried garbage is increased by about 60-80%; and the water content can be decreased by about 18-23%.

The invention relates to a compound microorganism bacterium agent which consists of Rhodopseudomonas palustris bacteria liquid, Alcaligenes faecalis bacteria liquid, Acinetobacter calcoaceticus bacteria liquid and bacillus megatherium bacteria liquid according to a volume ratio of 1:(2-3):4:2, wherein the amount of viable organisms in the four kinds of bacteria liquid is 2*10<8>cfu / ml. The invention also provides application of the compound bacterium agent in eutrophic water body treatment. The water body is subjected to pollution treatment through the four composite microbes, so that polluted substances in the water body are decomposed and metabolized, pollutants in the water body are degraded by stimulating growth of indigenous microorganisms in the environment, the index of each pollutant in the treated water body is obviously reduced, the dirt removal effect is good, and the removal rate is high.

The invention provides a stirring mud scraper for a clarification tank, which includes a steady flow cylinder, a reducer, a sleeve coupling, a working bridge, a lubricating water pipe, a rake frame, a transmission shaft, a mud scraper, a mud discharge pipe and a connecting flange , one end of the reducer is arranged inside the steady flow cylinder and the bottom end of the reducer is connected with a transmission shaft, the steady flow cylinder is arranged inside the working bridge, the surface of one end of the transmission shaft is fixed with a sleeve coupling and The transmission shaft runs through the bottom end of the steady flow cylinder, and the other end of the transmission shaft is provided with a connecting flange, and the connecting flange is connected with a plurality of steel wire ropes. The present invention has compact structure, high reliability, good stability, and no shaking , stable transmission, low power consumption, good mud scraping effect, small footprint, low cost of use, box-shaped structure, greatly lighter than traditional mechanisms, low operating costs, good economic and social benefits, suitable for popularization and use .

The invention belongs to the field of water environment protection, and particularly provides a system and method of low-carbon-source town sewage biological denitrification by adopting a push-flow-type anoxic tank, and belongs to the field of integration of activated sludge and biological membrane processes. The method is an important improvement based on an anoxic-aerobic biological denitrification process. An anoxic tank is transformed into the push-flow-type reaction tank and is divided into three to four sections; an elastic filler is added into an anoxic reactor to maintain a high sludge concentration, and a relatively long hydraulic retention time is adopted in the anoxic tank. In the anoxic tank, a push-flow reaction mode that three to four complete mixing reactors are connected in series is actually carried out. The method is suitable for improving a conventional biological denitrification process (the denitrification principle is based on combination of anoxic denitrification-aerobic nitrification), and the requirement on the carbon-nitrogen ratio of sewage can be reduced to 3.0-3.2 while the denitrification rate of the conventional process can be maintained and the denitrification rate is slightly improved. Compared with the conventional biological denitrification process, the method has the advantages that only the anoxic tank needs to be transformed, and the method is suitable for upgrading and modifying the existing process. According to the method disclosed by the invention, aeration energy consumption is reduced, and a supplementary carbon source is saved or even cancelled, so that operation cost is relatively low, and good economical efficiency is achieved.

The invention discloses a low-temperature low-turbidity period filter tank backwashing waste water coagulation reuse technical method. The method comprises the following steps: S1) regularly flushing a raw water filter tank, respectively passing the backwashing waste water in the raw water filter tank through a first flow pump and a second flow pump and conveying the waste water to a first backwashing waste water pool and a second backwashing waste water pool for storage; S2) stirring the backwashing waste water; S3) detecting the turbidity value; S4) setting a turbidity preset value of mixed water by a controller system and calculating the frequency of a reflux pump in the first backwashing waste water pool or the second backwashing waste water pool; S5) controlling the reflux ratio Phi of the backwashing waste water in the first backwashing waste water pool or the second backwashing waste water pool into a horizontal mixed sedimentation tank by the reflux pump; S6) performing coagulation; and S7) detecting the turbidity value of the mixed water in the horizontal mixed sedimentation tank, if the turbidity value of the mixed water is qualified, discharging water to the users by a water plant, and if the turbidity value of the mixed water is unqualified, performing secondary coagulation. The technical method solves the difficult control problem of the low-temperature low-turbidity period water turbidity, reinforces the low-temperature low-turbidity period water treatment effect, and guarantees the water quality.

The present invention relates to a pretreatment equipment capable of on-line improving yarn sizing performance for sizing machine. Said pretreatment equipment can be mounted between the warping beam frame of sizing machine and size box, and is formed from the following several portions: box body, guiding roller, high-voltage discharge heads, ozonator, UV irradiation device and sealing rubber-covered roll. Said invention also provides the working principle of said pretreatment equipment and its operation method.

The invention discloses a flat plate type sunlight leading-in lighting system. The flat plate type sunlight leading-in lighting system comprises a flat plate type sunlight gathering cover, a flat plate waterproof cap, a light ray catching reflecting sheet, a light guiding pipe and a diffusion device. The flat plate type sunlight gathering cover is installed on the flat plate waterproof cap, the light ray catching reflecting sheet is installed on the periphery below the flat plate type sunlight gathering cover, one end of the light guiding pipe is fixed to the lower portion of the light ray catching reflecting sheet through a light guiding pipe fixing ring, and the diffusion device is installed at the other end of the light guiding pipe. The flat plate type sunlight leading-in lighting system has the advantages that the sunlight can be transmitted into a room, the requirement for 8-10 hours of lighting in the daytime is met, and energy is greatly saved; the flat plate type sunlight leading-in lighting system is well combined with a building structure, the small flat plate type light gathering cover is adopted, electric energy is saved, and the land is saved; the flat plate type sunlight leading-in lighting system has the good insulating effect, and the operation cost of an indoor air conditioner can be saved; the flat plate type sunlight leading-in lighting system has good diffusion performance, light rays transmitted into the room can be diffused to all places needing the light.

The invention relates to a method for recycling low-temperature waste heat from waste incineration fume. The method comprises the following steps of: (1) introducing dedusted low-temperature waste incineration fume into a cold end of a heat pipe type heat exchanger to cool, wherein a heat-conducting medium in a heat pipe is gasified and enters a hot end of the heat pipe at the same time, and fumecontact sides of the heat pipe type heat exchanger are coated with an anticorrosive material; (2) introducing the cooled fume into a shell pass of a shell and tube condenser and fully exchanging the heat between the cooled fume and room temperature water in a tube pass to recycle the waste heat, wherein the fume contact sides of the shell and tube condenser are coated with the anticorrosive material; (3) collecting fume condensed fluid under the action of gravity on the lower part of the condenser to discharge, and performing subsequent innocent treatment; (4) introducing the condensed fume into the hot end of the heat pipe type heat exchanger to heat, wherein the heat conducting medium in the heat pipe is condensed and is returned to the cold end of the heat pipe in a gravity flow mode for repeated heat exchange at the same time; and (5) introducing the heated fume into a chimney to discharge directly. The method has the advantages of simple process, compact structure, small occupiedarea, small investment, low operating cost and the like, and thus has wide development prospect and high popularization value.

The invention relates to a method for recycling low-temperature waste heat from waste incineration fume. The method comprises the following steps of: (1) introducing dedusted low-temperature waste incineration fume into a cold end of a heat pipe type heat exchanger to cool, wherein a heat-conducting medium in a heat pipe is gasified and enters a hot end of the heat pipe at the same time, and fume contact sides of the heat pipe type heat exchanger are coated with an anticorrosive material; (2) introducing the cooled fume into a shell pass of a shell and tube condenser and fully exchanging the heat between the cooled fume and room temperature water in a tube pass to recycle the waste heat, wherein the fume contact sides of the shell and tube condenser are coated with the anticorrosive material; (3) collecting fume condensed fluid under the action of gravity on the lower part of the condenser to discharge, and performing subsequent innocent treatment; (4) introducing the condensed fume into the hot end of the heat pipe type heat exchanger to heat, wherein the heat conducting medium in the heat pipe is condensed and is returned to the cold end of the heat pipe in a gravity flow mode for repeated heat exchange at the same time; and (5) introducing the heated fume into a chimney to discharge directly. The method has the advantages of simple process, compact structure, small occupied area, small investment, low operating cost and the like, and thus has wide development prospect and high popularization value.

The invention discloses a circulating water recycling type industrial smoke dust collection purifier consisting of an outer drum, a central pipe, a buffering cover, a smoke intake pipe and a smoke exhaust pipe, wherein the outer drum is a cylinder, the smoke exhaust pipe is arranged at the vertex of the outer drum, a leaching pool is arranged at the lower part of the outer drum, the central pipe is arranged in the outer drum and is overlapped with the axis of the outer drum, the smoke intake pipe is introduced from the outside and passes through the outer drum to be communicated with the central pipe, an annular water pipe is installed at the upper part of the central pipe, water spray holes appointing to the centre are arranged on the annular water pipe, the annular water pipe is communicated with a high-pressure water pipe, water at the upper layer of the leaching pool is communicated with the annular water pipe through the high-pressure water pipe by utilizing a pump to form circulating water, the buffering cover covers over the central pipe, the leaching pool of the outer drum is communicated with a dust collection pool, and a sludge discharge gate is installed in the dust collection pool. According to the invention, the structure is simple, the construction and installation costs are low, the smoke dust is intensively leached by the central pipe, so that the dust collection efficiency is high and the dust removal effect is good, the leaching water is recycled and no water is basically consumed, so that the operation cost is low, and the pollution control effect is good, so that the circulating water recycling type industrial smoke dust collection purifier is especially suitable to be applied to medium-sized and small enterprises.

A station self-control dust removal system comprises a fan, a dust collector, a main vent line, branch vent lines, exhaust hoods, air valves, Hall switches and magnets; the dust collector is connectedbetween the fan and the main vent line, and one branch vent line is arranged between the main vent line and each station; the end of each branch vent line is provided with one exhaust hood, and the air valves are arranged between the ends of the branch vent lines and the exhaust hoods; the magnets are fixedly installed on valve plates of the air valves, and the Hall switches are installed on casings of the air valves, and matched with the magnets; when the air valves are closed, the magnets are adjacent and opposite to the Hall switches; when the air valves are opened, the magnets are separated from the Hall switches; the start-stop of the fan is controlled through a PLC; when the air valves of all stations are in the closed state, the fan is in a shutdown state; when the air valves of all the stations are in the open state, the fan runs with the maximum operating power; when the fan is started, the fan operating power is in direct proportion to the number of the air valves opened.

The invention relates to a method and a device for synchronously removing various heavy metals in agricultural non-point source sewage. The method comprises the following steps: enriching and culturing periphyton: after a purchased elastic filling is disinfected, adding the elastic filling into a natural farmland water body, and enriching and culturing periphyton; (2) inoculating the periphyton to a periphyton bioreactor; (3) debugging and operating single-electrode periphyton bioreactors arranged in an anaerobic reaction tank and an aerobic reaction tank of a periphyton reaction device: carrying out reaction on water and the periphyton to convert, adsorb and absorb heavy metal substances, wherein the pressure of the aerobic reaction tank (an aerobic section) of the periphyton reaction device is negative pressure; and (4) purifying water quality by virtue of a multi-stage periphyton bioreactor: connecting the single-electrode periphyton bioreactors in series, so that the inflow load is increased, the standing time is shortened, and the efficiency for removing various heavy metals is improved. The method has the characteristics of being simple, feasible and capable of avoiding a poisoning phenomenon and particularly has the characteristic that various heavy metals in the agricultural non-point source sewage can be removed.

The present invention discloses a production method for honeybee sea buckthorn fruit juice drink. The "bentonite - gelatin - silica sol" mode flocculation method is not suitable for producing sea buckthorn clear juice for two general reasons. One reason is that the adding "order" of bentonite and gelatin should be discussed. In the fruit juice, bentonite shows a negative charge and the gelatin shows a positive charge, but the pectin widely existed in sea buckthorn fruit juice mostly shows negative charge. Therefore, adding bentonite first is unfavourable to the flocculation of the pectin with a negative charge, especially when the pectin content in raw sea buckthorn juice is high. Thus adding coagulating agent with a positive charge first should be considered. According to the present invention, the sea buckthorn fruit juice drink has advantages of clarity, transparence, brightness, good stability, almost unchanged transmittance after high temperature or freezing processing, simple and practical method, easy operation, low investment in equipment, low operating costs, and realization of producing clear juice using ordinary template equipment.

The invention discloses a water-cooled PEMFC air excess coefficient control system and method. In water-cooled fuel batteries, control over voltage balance between the electric pile single batteries is achieved by controlling the air excess coefficient on the negative pole side of an electric pile in real time based on the actual situation of a load in the electric pile, and the service life of the electric pile is prolonged. The water-cooled PEMFC air excess coefficient control system comprises the PEMFC electric pile, the electronic load, a current sensor, a data collecting card, an upper computer, a controller and a mass flow meter. The air excess coefficient on the negative pole side is adjusted in real time, the voltage balance between the PEMFC single batteries can be well guaranteed, the response speed of the electric pile is increased, on the premise that the air excess coefficient of the negative pole of the water-cooled PEMFC system is kept in the adjustable range, the air excess coefficient control method is simple and high in reliability and universality, and it is ensured that a good voltage balance state is kept between the single batteries during electric pile running.

The invention provides a water-fertilizer recycling system and method and relates to the technical field of desert planting. The system comprises a tillage foundation pit, a diversion groove and a water return tank, the diversion groove is formed on one side of the tillage foundation pit and communicated with the tillage foundation pit in a penetrative manner, the water return tank is communicatedwith the diversion groove, the undersurface of the tillage foundation pit form an engineering foundation undersurface, first impermeable geotechnical cloth is paved on the engineering foundation undersurface, a water-permeable planting layer is filled on the first impermeable geotechnical cloth and used for planting crops and enabling water-fertilizer to downwards permeate to the surface of the first impermeable geotechnical cloth, and one side, close to the diversion groove, of the engineering foundation undersurface is lower than one side, away from of the diversion groove, of the same to enable the engineering foundation undersurface to be arranged downwards in a manner of inclining to the diversion groove. Compared with the prior art, the system has the advantages that desert facilityagriculture water-fertilizer recycling technology on the basis of conventional planting technology can be provided, and water-fertilizer utilization efficiency is improved substantially.