21results about How to "Achieving zero emissions" patented technology

The invention discloses a recovery system and a recovery method for gold in a gold separation liquid, and the recovery system comprises an ion recognition system, a reduction system, a washing system and an evaporation system; the recovery method specifically comprises the following steps: (1) primary identification; (2) secondary identification; (3) reducing and depositing gold; (4) washing the gold powder; and (5) waste liquid evaporation. According to the method, AuCl4 <-> is recognized through chloride ions, the gold-rich liquid is directly reduced to produce a qualified gold powder product (99.995%), the gold-poor liquid and the reduced liquid are evaporated and concentrated, the condensate is recycled, the chloride ions are recovered and regenerated, the ion recognition agent is recycled, and no waste liquid or waste gas is generated in the production process.

The invention relates to the technical field of desulfurization wastewater treatment, in particular to a desulfurization wastewater treatment system which comprises a gypsum cyclone used for performing solid-liquid separation treatment on desulfurization wastewater from a gypsum slurry buffer tank and then conveying upper cyclone overflow into a gypsum overflow slurry tank; the gypsum overflow slurry tank is used for conveying the rotational flow overflow into the accident slurry tank when the chloride ion concentration value in the rotational flow overflow is greater than the set concentration threshold value of the absorption tower; the accident slurry tank is used for carrying out precipitation treatment on rotational flow overflow from the gypsum overflow slurry tank and then conveying clear liquid at the upper part of the accident slurry tank into the wastewater concentration tower; and the wastewater concentration tower is used for performing concentration reduction treatment on the clear liquid from the accident slurry box, and conveying the concentrated slurry to the drying system for drying treatment when the chloride ion concentration value of the slurry in the wastewater concentration tower reaches a concentration threshold value required by the drying system. By applying the system, the desulfurization wastewater treatment efficiency can be effectively improved.

This utility model discloses a zero-discharge wastewater system for the tire industry, relating to the field of water treatment technology. The technical solution includes a first water treatment unit, a primary reverse osmosis unit, a primary reverse osmosis concentration unit, and a secondary reverse osmosis system for deep treatment. The first water treatment unit includes a raw water tank, a self-cleaning filter, an ultrafiltration system, and an ultrafiltration permeate buffer tank connected in sequence. The secondary reverse osmosis system for deep treatment treats the concentrated water from the second concentrated water tank using secondary reverse osmosis. By setting up a primary reverse osmosis unit, a primary reverse osmosis concentration unit, and a secondary reverse osmosis system for deep treatment, this application achieves high water utilization and low energy consumption requirements for the tire industry by treating the concentrated water from the second concentrated water tank using secondary reverse osmosis.

The utility model discloses an environment-friendly and efficient sintering circular cooler low-temperature waste heat recovery system, and belongs to the technical field of waste heat recovery and utilization in the steel smelting industry. The problems that in the prior art, low-temperature waste gas of the sinter cooler is directly emptied, or simple and low-efficiency waste heat recovery is conducted, so that a large amount of heat which is not fully utilized is lost, and the energy-saving requirement is not met are solved. According to the technical key points, flue gas of the third section of the circular cooler is conveyed to the top of the low-temperature combined waste heat boiler through a pipeline and exchanges heat with a steam-water heat exchange part; a lower circulating waste gas outlet of the low-temperature combined waste heat boiler is connected with an inlet of a cooling air blower of the fifth section of the annular cooler through a pipeline, a flue gas outlet of the fifth section of the annular cooler is connected with an inlet of a cooling air blower of the fourth section of the annular cooler through a pipeline, and a flue gas outlet of the fourth section of the annular cooler is connected with an inlet of a cooling air blower of the third section of the annular cooler through a pipeline. The grate type cooling device is used for sinter cooling in the iron and steel smelting industry or other occasions needing grate type cooling of materials, and has the effects of reducing waste gas emission and improving the low-temperature waste heat recovery efficiency.

The present invention provides a method for producing high-performance lithium-ion power batteries using cobalt sulfate, comprising the steps of adding water to crude cobalt hydroxide and stirring to obtain a slurry; pumping the slurry into a leaching tank for reduction leaching, performing pressure filtration after the leaching is completed, performing countercurrent washing on the filter residue, and analyzing the pH value and Fe content of the leaching solution in the filtrate. 2+ Concentration, based on Fe 2+ The concentration is oxidized, neutralized and precipitated to remove iron; the iron-removed liquid is extracted and impurities are removed by P204, cobalt is extracted by P507 and separated from nickel and magnesium to obtain a cobalt sulfate solution, the P507 raffinate is evaporated and crystallized to produce ammonium magnesium sulfate, the cobalt sulfate solution is deoiled and demagnetized, and MVR is evaporated and crystallized to obtain high-performance lithium-ion power battery cobalt sulfate. The high-performance lithium-ion power battery produced by using cobalt sulfate in the present invention improves leaching, extraction and other processes compared to traditional industrial cobalt sulfate production, greatly reduces the use of raw materials and the impact on the environment, and can obtain ammonium magnesium sulfate as a by-product in the production process to improve economic benefits.

The invention discloses a starch wastewater treatment resource recycling method which comprises the following steps: precipitating unhydrolyzed starch in strongly acidic starch wastewater to obtain precipitated effluent and precipitated slurry; performing membrane filtration on the precipitated effluent to generate membrane filtration produced water and membrane filtration concentrated water; adsorbing specific ions in the membrane filtration produced water by adopting a selective adsorbent to obtain adsorbed produced water and an adsorption saturated adsorbent; an acid removal agent is added into the adsorption saturated adsorbent for acid removal regeneration, a desorption solution and a regenerated adsorbent are obtained, and the regenerated adsorbent participates in adsorption of specific ions again; and concentrating the desorption liquid to obtain the compound fertilizer production raw material. Specific ions in the starch wastewater can be adsorbed, and the specific ions adsorbed in the adsorbent are subjected to acid removal, so that the adsorbent is recovered and can be used for adsorption again, the cyclic utilization of the adsorbent is realized, and meanwhile, a desorption solution generated by the acid removal of the adsorbent can form a production raw material of a compound fertilizer after being concentrated.

The invention belongs to the technical field of artificial fiberboard production, and discloses a method for manufacturing a recyclable environment-friendly fiberboard from agricultural straws, and the method comprises the following steps: preparing materials, pretreating raw materials, dissociating the raw materials, adding chemicals, paving and forming, squeezing and dehydrating, and drying to obtain a finished product. According to the novel fiberboard, the agricultural straw is used as the raw material, self-adhesion can be generated among fibers by controlling the pretreatment and mechanical dissociation conditions, no trialdehyde adhesive needs to be added in the production process, and the prepared novel fiberboard is free of formaldehyde release and meets the requirement for green and sustainable development. The method is a green fiberboard manufacturing method which is wide in raw material source, simple, non-toxic and harmless.

The utility model discloses a kind of zero-emission aviation parts cleaning machine, it is related to aviation cleaning equipment technical field.It includes liquid path system, electric control cabinet, cleaning tank, online detection module, oil-water separation device, solidification collection module;The online detection module is electrically connected with electric control cabinet, for real-time monitoring the oil content concentration in cleaning fluid, granularity, salinity and feedback to electric control cabinet;The oil-water separation device is connected with cleaning tank by recovery pipeline, for separating oiliness and moisture in waste liquid;The solidification collection module includes the oiliness solidification component connected with the oil-water separation device and with salt solidification component, respectively for solidification collection to the oiliness separated by the oil-water separation device and concentrated salt class.This utility model realizes the zero-emission of cleaning waste liquid, improves water resource utilization rate, and oil salt treatment is convenient, suitable for the environmental protection cleaning of aviation parts.

The utility model belongs to the technical field of industrial waste residue recycling, and particularly discloses a system for producing lime from carbide slag. The system is composed of a carbide slag warehouse, metering equipment, conveying equipment A, conveying equipment B, conveying equipment C, conveying equipment D, a homogenization metering system, a cyclone preheating system, a cyclone calcination decomposition system, a suspension cooling system, a lime warehouse, a homogenization metering system, granulation equipment, a calcium carbide production line and the like. The device disclosed by the utility model has the beneficial effects that the process flow is simple, the layout is compact, the suspension preheating decomposition calcining technology of cyclone preheating, pipeline type decomposition furnace and suspension cooling is adopted, continuous production can be realized, the production efficiency is high, the decomposition rate of carbide slag is greater than 98%, and the yield is high; according to the utility model, the calcium carbide slag suspension calcination technology is adopted, the unit product energy consumption of lime can be reduced, so that the unit energy consumption of calcium carbide finished products is reduced, the calcium carbide by-product furnace gas is adopted as the calcination fuel, the reasonable and full utilization of coal resources can be realized, and no extra coal resource consumption is caused.

The invention discloses a recycling dyeing and recyclable dyeing device, comprising a chassis, a water storage tank arranged inside the chassis, a dye stirring drum and a dyeing chamber, a PLC controller is installed on the outer side of the chassis, a water outlet of the water storage tank installed inside the chassis is connected to the dye stirring drum through a pipeline with a water filter, and the dyeing chamber is connected to a solid-liquid separator through a pipeline with a bag filter. The dye stirring drum is connected to the dyeing chamber through a pipeline with a metering pump; a microwave generator is installed inside the dyeing chamber, and an ultrasonic generator and an ultrasonic transducer are installed on the side of the dyeing chamber; the device separates the dyed liquid into solid and liquid through the solid-liquid separator, which not only reduces the discharge of wastewater and reduces the pollution to the environment, but also saves water resources and dyes, and realizes the effective recycling of resources; the device combines the two processes of spray dyeing and immersion dyeing, and the dyeing device can achieve economical use of dyes while ensuring dyeing uniformity.

The present application provides an acid gas separation process, which comprises the following steps: separating the acid gas to be treated into gas and liquid, wherein the liquid is sent to a sewage buffer tank, and the gas is sent to a booster compressor; the liquid produced after boosting is sent to the sewage buffer tank, and the boosted gas is sent to a deliquidation device; the removed liquid is sent to the sewage buffer tank, and the gas is sent to a primary electric heater for heating, and then sent to a hollow fiber membrane group for separation, H 2 S output to H 2 S booster compressor boosts pressure, mixed with H 2 S'CO 2 After being separated by hollow fiber membrane group again, H 2 S output to H 2 S booster compressor boost, CO 2 Output to CO 2 In booster compressor; in H 2 S booster compressor boosts H 2 When S reaches a supercritical state, it is sent to the formation for storage; 2 In CO 2 After the pressure is increased and adjusted in the booster compressor, it is sent to the formation for sealing or transported to the oil recovery well for oil recovery.

The utility model discloses a kind of self-filtering spray tower circulating water waste gas treatment systems, including tower body, circulating water pool, at least two layers of filler layer, spraying structure, microbubble generating unit, slag scraper and automatic slag discharge device, and the bottom of tower body is equipped with waste gas entrance, and the top of tower body is equipped with waste gas outlet, and tower body is equipped with circulating water pool;At least two layers of filler layer at least two layers of filler layer are vertically spaced and located in tower body: spraying structure includes multiple spraying heads evenly arranged above filler layer, and is communicated with circulating water pool by circulating pipeline;Microbubble generating unit is used to release microbubble to liquid layer of circulating water pool;Slag scraper is arranged at the liquid level of circulating water pool;Automatic slag discharge device is used to receive and handle the dross scraped by slag scraper.This application realizes the internal self-purification of spraying liquid, fundamentally solves the problem that traditional spray tower needs frequent water change due to water quality deterioration, achieves the goal of water-saving, energy-saving "zero water change".

This invention discloses a method and system for treating fermentation wastewater, belonging to the field of fermentation wastewater treatment. This invention solves the problems of non-zero discharge, low treatment efficiency, and high treatment difficulty in existing technologies for fermentation wastewater. This invention designs different treatment routes and systems for three types of wastewater with different characteristics: high-salinity wastewater, low-salinity wastewater, and microbial protein waste liquid. For high-salinity wastewater, a process of screen + coagulation sedimentation + multi-media filtration + ozone catalytic oxidation is used to remove organic matter and total phosphorus; for low-salinity wastewater, a highly active sludge biochemical treatment technology is used to remove nitrogen and phosphorus; and for microbial protein waste liquid, a sludge collection + screw press dewatering technology is used to achieve thorough dewatering. The treatment processes for the three types of wastewater are carried out simultaneously, and the effluent is recycled back into the three systems for further treatment, achieving zero discharge of fermentation wastewater. Furthermore, this treatment method reduces the wastewater treatment pressure on the system, improves treatment efficiency, and allows for wastewater reuse, showing broad application prospects.

The present invention provides a desulfurization wastewater treatment method and system, the method comprising: determining the water inlet mode of the desulfurization wastewater to be treated according to the type of the desulfurization wastewater to be treated; transporting the desulfurization wastewater to be treated to a first clarification device for treatment to obtain a first transition clear liquid, or transporting the desulfurization wastewater to be treated to a second clarification device for treatment to obtain a second transition clear liquid; transporting the first transition clear liquid to a first electrochemical reaction device for treatment to obtain a first reaction product, or transporting the second transition clear liquid to a second electrochemical reaction device for treatment to obtain a second reaction product; transporting the first reaction product to a first reuse treatment device for treatment to obtain a first target product, or transporting the second reaction product to a second reuse treatment device for treatment to obtain a second target product. The scheme of the present invention treats wastewater through electrochemical reaction to achieve target product reuse and zero discharge of desulfurization wastewater.

The application discloses a kind of recycled concrete artificial stone, it is related to building waste resource utilization and recycled concrete product technical field technical field.A kind of recycled concrete artificial stone, artificial stone mass parts composition is as follows: filling material: 70-95 parts;Filling material is selected from building waste recycled mixture, recycled coarse aggregate, recycled fine aggregate, recycled sand powder, recycled micro powder one or any combination of several;Cementitious material: 5-30 parts;Cementitious material is selected from portland cement, solid waste-based cementitious material, alkali activator one or any combination of several;Water: cementitious material and water water-cement ratio is 0.28-0.42.The present application can be fully efficient, crack industry pain point, realized the collaborative disposal utilization of three building wastes, utilizes the cementitious activity of recycled micro powder to match solid waste-based cementitious material, effectively stabilizes the big problem of performance fluctuation of recycled aggregate, process simplification, production efficiency revolution, excellent performance, scene full coverage, green low carbon, economic.

The invention relates to the technical field of steel rolling production line sewage treatment, and particularly discloses a steel rolling production line wastewater zero discharge-based backwashing water treatment system and a working method.The steel rolling production line wastewater zero discharge-based backwashing water treatment system comprises a backwashing water precipitation unit, a sludge concentration unit and a dehydration unit, and the backwashing water precipitation unit is used for treating backwashing water generated by a bypass filter; backwashing water is subjected to primary precipitation through the backwashing water precipitation unit to form supernate, the supernate returns to the circulating water system, and muddy water obtained after primary precipitation is input into the muddy water concentration unit; the sludge concentration unit is used for carrying out secondary precipitation concentration on the mud water subjected to primary precipitation, supernate returns to the backwashing water precipitation unit, and the mud water subjected to secondary precipitation is input into the dehydration unit; the dewatering unit is used for further separating sludge from water, and the separated water enters the backwashing water precipitation unit for further cyclic utilization; zero emission of the backwashing water is realized, clean water treated by the backwashing water is recycled, and ferric oxide in the backwashing water is recycled and sold as a byproduct, so that the cost is reduced, and the benefit is increased.

The application discloses a microwave-probiotics synergistic process for enzymatic Cordyceps militaris protein peptide and application thereof, and belongs to the field of food biotechnology. In view of the problems of low hydrolysis efficiency, poor retention of active ingredients, limited bioavailability and lack of greenness in the preparation of Cordyceps militaris protein peptide, after supercritical CO2 defatting pretreatment, a "complex protease-intermittent microwave-delayed addition of probiotics" synergistic system is constructed, and high-efficiency directional hydrolysis is realized by precise control of parameters; the finished product is obtained through subsequent step-by-step inactivation, 10 kDa ultrafiltration purification and low-temperature vacuum drying; with the synergistic effect of microwave wall breaking and probiotic metabolites (organic acids and peptidases), the degree of protein peptide hydrolysis is greater than or equal to 38%, the proportion of 5-6 peptides is greater than or equal to 90%, the retention rate of cordycepin is greater than or equal to 92%, and the bioavailability is increased by more than 35%; meanwhile, enzyme preparation recycling, residue resourceization and process cost reduction by more than 25% are realized. The protein peptide can be widely applied in the fields of functional food, feed additive and cosmetic raw material, and has economic value and environmental protection benefit.

This invention relates to the field of waste heat recovery technology in sintering of iron and steel metallurgy, and discloses a three-stage waste heat recovery system for sintering ring coolers. The system includes a sintering ring cooler body, a recovery boiler, and a protective shell. The sintering ring cooler body is composed of multiple sections. A conveying pipe is installed on the third section of the sintering ring cooler body, with the other end of the conveying pipe connected to the recovery boiler. An installation pipe is installed at the bottom of the recovery boiler, with the other end of the installation pipe connected to the protective shell. This invention forms a complete closed-loop circulating gas path. The waste gas from the three stages of the sintering ring cooler body continuously enters the recovery boiler through the conveying pipe to complete waste heat recovery. After heat exchange, the waste gas is filtered, recirculated, and then reintroduced into the equipment. There is no waste gas discharge throughout the entire process. This maximizes the utilization of the waste heat resources of the three stages of the sintering ring cooler, improves energy efficiency, achieves zero emissions of flue gas from all three stages, and eliminates waste gas pollution. Simultaneously, the coordinated operation of all components ensures the long-term stable and efficient operation of the system.

A chlor-alkali industrial salt mud washing and dechlorination device and process, firstly, the chlor-alkali industrial salt mud is sent into a stirring and dissolving kettle, and sodium chloride concentrate and washing circulating liquid are circulated to the stirring and dissolving kettle for stirring; the stirred and dissolved material is sent into a flocculation kettle to add a coagulant aid PAM, and then sent into a clarification sedimentation tank for free sedimentation, the settled solid matter is sent into a first centrifuge for solid-liquid separation, the supernatant and the centrifuge liquid are sent into a first circulation tank, part of the sodium chloride concentrate in the first circulation tank is circulated to the stirring reactor, and the remaining part is sent to the salting section for recycling; the separated solid matter is sent into a washing machine, and the washing circulating liquid in the second circulation tank is used for washing and dechlorination, the solid matter is sent into a second centrifuge, the washing liquid and the centrifuge liquid are sent into a second circulation tank, the solid matter is landfilled or further recycled, part of the material in the second circulation tank is circulated to the stirring and dissolving kettle, and the remaining part is circulated to wash the material; the present invention realizes the washing and dechlorination of salt mud and improves the quality of resource recovery products.

The utility model discloses a distributed dust removal system which comprises a plurality of dust suction devices, a sewage pipe and a backflow treatment bin, the dust suction devices can be distributed in a plurality of areas needing dust removal, sewage outlets of the dust suction devices are communicated with the sewage pipe in parallel, and the tail end of the sewage pipe is connected with the bottom of the backflow treatment bin. A demisting device, an air outlet, a sludge pipe and a clear water pipe are arranged in the backflow treatment bin, the clear water pipe is connected with a water inlet pipe of the dust suction device after being connected with a water pump and provides a water source for the dust suction device, an inlet of the sludge pipe extends into the bottom of the backflow treatment bin, an outlet of the sludge pipe is connected with the filter press, and the air outlet is connected with the main fan. The starting end of the sewage pipe is higher than the tail end of the sewage pipe in the horizontal direction, sewage can conveniently flow back to the backflow treatment bin, dust is effectively mixed at a high speed for multiple times in the dust collection stage through the arrangement of the dust collection device, the dust collection efficiency and effect are improved, the treatment process of the dust collection system is shortened, water resources are recycled, and the environment is protected. And'zero discharge 'of dust and sewage is realized.

The invention relates to an industrial high-salinity wastewater evaporation desalting process, which belongs to the technical field of wastewater environment-friendly treatment processes, and can solve the problems of high use cost, strong use limitation and the like existing in the existing desalting of various industrial wastewater, the industrial high-salinity wastewater is firstly subjected to a neutralization reaction by alkali liquor or acid liquor, and materials after the neutralization reaction are heated in an evaporation module; heat in the evaporation module comes from a water source heat pump; after the specified temperature is reached, water vapor generated in the evaporation module is sent to a cooling module for condensation, and condensate water directly enters a biochemical system for COD removal treatment; the residual condensed components continue to enter the evaporation module, the concentration of the materials in the evaporation module is gradually increased after continuous evaporation treatment, the materials are transferred into a crystallization kettle to be cooled and crystallized after the specified concentration is reached, the cooled and crystallized materials are discharged into a centrifugal machine to be subjected to solid-liquid separation, and solids are sold as by-products; the liquid is transferred into a mother liquor geosyncline as mother liquor, and then is sent back to a raw material tank for recycling, so that zero discharge of wastewater is realized.