33results about How to "Realize a closed loop" patented technology

The invention provides an ocean thermal energy conversion method and an ocean thermal energy conversion device. The method comprises the following steps of: heating a low-boiling-point working medium by using hot seawater on a surface of ocean; evaporating the low-boiling-point working medium; feeding into a turbine to push a turbo generator set to work for power generation; condensing working medium gas which is exhausted from the turbine into liquid by using cold seawater on a deep layer of the ocean; heating by using the hot seawater; feeding into the turbine to make the working medium gasevaporated; pushing the turbo generator set to work for the power generation; cyclically executing the steps; and continuously carrying out power generation. Power is generated by using ocean surfacewind power, a heat pump device is driven by the power, the temperature of the working medium is further raised by using a medium of the heat pump device, and the volume expansion ratio of the workingmedium is improved; and the temperature of the cold seawater is further reduced by using the medium of the heat pump device, the working medium exhausted gas is condensed by using the low-temperatureseawater, and a condensing effect of the working medium exhausted gas is improved. The method and the device improve the efficiency of closed cycle generation of ocean thermal energy conversion, realize the comprehensive utilization of ocean thermal energy and wind energy, have an important practical value, provide environment-friendly energy sources, and are easy to use and promote in large scale.

The invention discloses a sewage purifying method for a coal conveying system. The method comprises the following steps: step 1, introducing conveyed coal washing water; step 2, treating sewage in a secondary sedimentation tank; step 3, treating sewage large-particle suspended solids; step 4, treating sewage small-particle suspended solids; step 5, absorbing and intercepting sewage filtered in a filtering area through a filtering layer, so that water flows into a clear water tank after being purified and rising to a clear water area, and sludge in a sludge concentration area is intermittently discharged into a primary sedimentation tank for sedimentation through a sludge discharging valve at the bottom of a water purifier. The sewage purifying method disclosed by the invention has the benefits that that a wastewater recycling system is brief in process, reliable in performance, relatively low in investment cost, relatively high in price performance ratio, small in area occupied by system equipment, relatively low in running cost, and obvious in environmental benefits and economic benefits.

The invention belongs to the technical field of nuclear power plant overhauling, and particularly relates to a welding device for nuclear-grade gate valve element seal face repairing, and aims at achieving the purpose that for limitation of existing technologies and equipment, welding equipment applied to online repairing of a radioactive stained nuclear-grade gate valve plate in a nuclear power plant radioactive workshop is invented to repair the nuclear-grade gate plate in which cracks, large pits or corrosion or the like exist in the seal face, the vacancy in the domestic online nuclear-grade gate valve plate repairing is filled up, and meanwhile the construction environment is improved, wherein the above defects cannot be repaired only through turning and grinding. The welding device is characterized by comprising a base structure, a shell structure, a welding machine and a waste gas adsorption structure; and since a surfacing device can be applied into the nuclear power plant workshop, the polluted valve plate can be repaired online without being taken out of the workshop, and the problem that radioactive stained equipment cannot be taken out of the workshop for offline overhauling is effectively solved.

The invention discloses a wet repair and regeneration method for a waste lithium iron phosphate positive electrode material, which comprises the following steps: S1, soaking a waste lithium iron phosphate positive electrode plate by using an organic solvent, and drying to obtain a clean lithium iron phosphate positive electrode plate; s2, soaking the clean lithium iron phosphate positive plate in N-methyl pyrrolidone, performing ultrasonic treatment, and performing solid-liquid separation to obtain LFP powder and an aluminum sheet; s3, the LFP powder is placed in a material repairing agent for material repairing, and repaired LFP powder is obtained through solid-liquid separation and water washing; and S4, mixing the dried and repaired LFP powder with excessive Li2CO3 or LiOH, and carrying out regeneration sintering under the protection of a nitrogen or argon atmosphere to obtain the regenerated and repaired lithium iron phosphate powder. According to the method, the failure mechanism of the lithium iron phosphate is fully utilized, the damaged lithium iron phosphate positive electrode material is directly repaired in a wet repair mode, chemical components in the lithium iron phosphate positive electrode material are recycled to the maximum extent, and the recycling cost of the material is saved to the maximum extent.

The invention relates to a two-stage integrative drying plant which is characterized by comprising an oven body (10), a drying unit (60) and a heat pump device (80), wherein the oven body (10) comprises a drying oven cover (20) and a base (50); a drying cavity (13) and a recovery cavity (14) which are mutually communicated are arranged in the drying oven cover (20); the drying unit comprises a fan (30) which is provided with an inlet channel (63), an exhaust channel (64) and an air outlet channel (68); the fan (30) is a tangential fan; the heat pump device (80) comprises a heat pump subcooler(82), a heat pump cooler (83), a middle cooler (84), a heat tube heat exchanger (95), a heat pump compressor (89), a heat pump throttling valve (87), a heat pump condenser (88), a cold compressor (99) and a refrigerant evaporator (96), wherein the cold compressor (99), the middle cooler (84), the heat pump compressor (89), the heat pump condenser (88), the heat pump throttling valve (87) and the refrigerant evaporator (96) are successively connected and loop the first and the last. The invention is suitable for processing equipment for continuous running thin strip objects and has the effectsof small volume, high efficiency and energy saving.

The invention discloses a method for recovering and repairing a lithium iron phosphate material. The method disclosed by the invention comprises the following steps: by taking positive leftover materials in a battery production process, positive plates obtained after dismantling defective batteries and / or positive plates obtained by recovering and dismantling waste batteries as raw materials, heating, maintaining the temperature, and separating current collector aluminum foils so as to obtain the recovered lithium iron phosphate material; and repairing the lithium iron phosphate material in a manner of adding an element source. According to the method disclosed by the invention, more elements are added according to a stoichiometric ratio, the re-synthetic repair reaction is fully carried out, the recovered and repaired lithium iron phosphate material is a pure phase lithium iron phosphate material, and the ordinary commercial lithium iron phosphate material level can be reached. The method uses lithium iron phosphate in the battery production process and the recovery phase and has the advantage of capacity of realizing closed cycle.

The invention discloses a closed circulation system for improving the operating efficiency of a gas drainage pump. The liquid inlet of a pneumatic diaphragm pump is connected with the liquid outlet of a polymer drag-reducing solution tank, and the liquid pipe of the pneumatic diaphragm pump leads into a circulating water pool. A pneumatic agitator is arranged inside the polymer drag reducing solution tank, and a feeding funnel is arranged on the top. The liquid outlet of the submersible pump is respectively connected with the liquid inlet of the polymer drag reducing solution tank and the liquid inlet of the gas drainage pump through a tee, and the discharge pipe of the gas drainage pump is connected to the circulating pool. The high-speed operation of the pneumatic agitator and the pneumatic diaphragm pump is used to mix the polymer drag-reducing solution evenly and send it into the circulating pool. At the same time, the outlet pipe of the submersible pump supplies water to the polymer drag-reducing solution tank, and the polymer drag-reducing solution is added through the feeding funnel. agent to realize the continuous dosing of drag reducing solution, ready to use. The gas drainage pump uses polymer drag reducing solution as the working medium, which can greatly improve the operating efficiency of the gas drainage pump. The system is simple in structure, easy to operate, and realizes a closed cycle of drag reducing solution supply.

The invention discloses a lithium ion battery positive electrode material recycling and regenerating process, which does not separate and purify valuable metals in a leaching solution, but directly supplements elements and adjusts the proportion of the elements to regenerate the positive electrode material, so that the tedious separation step is omitted, and the process cost is reduced. The method has the advantages that the problem of complicated element separation of a nickel, cobalt, manganese and lithium mixed solution system can be avoided, the lithium loss is reduced, the additional value of regenerated products can be obviously increased, the recovery efficiency and the economical efficiency are improved, and the closed circulation of waste lithium ion battery materials is realized; high-temperature flue gas generated by the regeneration furnace is conveyed to the annealing furnace, the roasting furnace and the atomizing chamber for multi-stage full utilization, multi-stage utilization of high-temperature flue gas, medium-temperature flue gas, low-temperature flue gas and waste gas is achieved in the whole flue gas circulation process, energy consumption in the process is saved, and heat loss of the system is reduced.

The invention relates to an evaporation and recycling process of a methanol water solution of sodium chloride. The evaporation and recycling process sequentially comprises the following steps: (1) pre-heating a new raw solution for raising the temperature; (2) heating and evaporating the raw solution by utilizing fresh steam in a single-effect falling-film evaporator to form a single-effect concentrated solution, and evaporating methanol and moisture to generate single-effect steam; (3) in a double-effect falling-film evaporator, heating and evaporating the single-effect steam by utilizing the single-effect concentrated solution to obtain a double-effect concentrated solution, and generating double-effect steam; (4) in a three-effect forced circulating evaporation and crystallization unit, heating the double-effect concentrated solution by utilizing the double-effect steam to form three-effect crystal slurry, and generating three-effect steam; (5) enabling the three-effect crystal slurry to enter a three-effect hydrocyclone for concentrating and thickening, returning a light phase back to the three-effect forced circulating evaporation and crystallization unit for circulating, and conveying a heavy phase into a thick tank for concentrating and thickening; and (6) conveying the heavy phase of the thick tank into a centrifuge for separating, discharging sodium chloride crystals from a solid-phase outlet of the centrifuge, and conveying a mother solution into a mother solution tank. The process is low in energy consumption and can realize complete recycling of sodium chloride and methanol.

The invention discloses an underground nuclear power plant with a disposal site for low and intermediate radioactive waste, which includes a nuclear island placed in the cavern group of the nuclear island of the mountain and a conventional island placed on the ground platform outside the mountain. The reactor building, the nuclear fuel building, the safety building, the electrical building and the nuclear auxiliary building arranged around the reactor building also include the low and intermediate level waste disposal site placed in the mountain nuclear island cavern group, and the low and intermediate level waste disposal site passes through the waste The transport tunnel is connected with the nuclear auxiliary plant of the nuclear island. Combining the characteristics of underground nuclear power plants, the present invention can not only meet the disposal requirements of low and intermediate radioactive wastes, realize closed cycle of fuel, reduce possible radioactive pollution in fuel cycle process, but also realize unified planning and construction of nuclear power plants and disposal sites, cut costs.

The invention relates to a manned test device for people, fishes and Azolla imbircata and a working method. The device comprises a cabin body which is composed of a front side plate, a rear side plate, a left side plate, a right side plate and a ceiling, wherein each side plate of the cabin body is assembled by assembling color steel plates separately, each color steel plate has film attached to double sides, and the lower end of each side plate of the cabin body is sleeved by slot aluminum which is connected with the foundation; the ceiling is composed of two inclined plates, an angle betweenthe two inclined plates is an obtuse angle, and the inclined plates are obtained by assembling colored steel corrugated sheets; a hung ceiling is arranged below the ceiling and in the cabin body, thehung ceiling is composed of two second inclined plates, and an angle between the two second inclined plates is an obtuse angle. The device not only has a simple mechanism, but also can be conveniently applied to ground simulation researches, and meanwhile an air tightness test method is simple and convenient.

The invention relates to a people, fish and vegetable manned test device and an operating method thereof. The people, fish and vegetable manned test device comprises a cabin formed by a front side plate, a rear side plate, a left side plate, a right side plate and a roof, wherein each side plate of the cabin is assembly by splicing double-sided film coating colored steel plates, the lower end of each side plate of the cabin is respectively sleeved with groove aluminum connected with the foundation, the roof is composed of two inclined plates with the included angle being an obtuse angle, the inclined plate is formed by splicing colored steel corrugated plates, the cabin is located below the roof and is provided with a ceiling, and the ceiling is composed of two second inclined plates withthe included angle being an obtuse angle. The people, fish and vegetable manned test device is not only simple in mechanism, but also convenient to be applied to ground simulation research, and simpleand convenient in airtightness test method at the same time.

The invention belongs to the field of solid waste disposal and resource utilization, and in particular relates to a process for production of biogas by wet method-dry method combined two-stage anaerobic fermentation. Broken solid waste and an inoculum are mixed in a full wet type reactor for wet anaerobic fermentation, the wet anaerobic fermentation period hydraulic retention time (HRT) is 5-20 days, after fermentation processing, a fermentation material can be delivered to a dry method fermentation reactor with an infiltration device at the bottom for dry solid fermentation for production of the biogas, and the process combines the dual advantages of wet method fermentation and dry method fermentation. The fermentation process integrating the advantages of fast mass transfer and easy start-up characteristics of the wet method fermentation and reaction space saving of the dry method fermentation, and the like is disclosed. By combination of biomass multistage decomposition and transformation in the fermentation process and methane producing bacteria group enrichment principle, the wet fermentation process advantage is used, the wet fermentation process is used as a homogeneous inoculation stage of the dry method fermentation process, and the problems of difficult inoculation and slow start of the dry method fermentation can be solved.