23results about How to "Achieve zero emissions" patented technology

The application provides a photoresist waste liquid recycling device and process, by adding hydrochloric acid to the photoresist waste liquid in the acidification precipitation tank in the pretreatment module to adjust the pH value, the linear phenolic resin precipitation rate reaches more than 95%, and the linear phenolic resin can be used again to the production stage of the photoresist after centrifugal separation, a compound coagulant containing sulfide and polyaluminum chloride is added to the heavy metal capture tank in the pretreatment module, and the removal rate of heavy metal ions reaches 99.5%; then the photoresist fragments are separated by using an ultrafiltration device, and the diatomite modified by NaOH and polyetherimide is used for adsorption and decolorization, then two-stage vacuum distillation process is used to realize the recovery of high-purity solvents in the photoresist waste liquid, finally, the remaining residue is polymerized and cured by ultraviolet radiation, and the solid fuel with high heat value can also be prepared, so that the 'zero emission' and resource full recovery of the photoresist waste liquid are realized, and the treatment cost and environmental risk are significantly reduced.

The application discloses a treatment method of ferric phosphate wastewater, comprising the following steps: S1. adding a certain amount of water-soluble ferrous salt and an oxidizing agent into the ferric phosphate wastewater, so that the molar ratio of phosphorus to iron in the wastewater is 1:(1-5); S2. neutralizing by adding alkali, and adjusting the pH to 2.5-3.5; S3. performing solid-liquid separation to obtain a filter cake and a filtrate; S4. firstly performing ceramic membrane separation on the filtrate, then performing nanofiltration membrane treatment on the ceramic membrane clear liquid, and then performing reverse osmosis membrane treatment on the nanofiltration membrane clear liquid to obtain a reverse osmosis clear liquid and a reverse osmosis concentrated liquid; and S5. mixing the nanofiltration membrane concentrated liquid and the reverse osmosis concentrated liquid, and then performing treatment by using an MVR system to obtain an MVR evaporation liquid and a sulfate crystal product. The application is not introduced with calcium ions, and is treated by using a one-step precipitation method under a low pH condition, and is comprehensively treated by using a ceramic membrane + nanofiltration membrane + reverse osmosis membrane, so that the purpose of zero discharge of the ferric phosphate wastewater is achieved.

The invention discloses a desulfurization wastewater zero discharge system based on magnetic seed crystal induction and a treatment method, the desulfurization wastewater zero discharge system based on magnetic seed crystal induction comprises a premixing module, an atomization module, a magnetic separation module and a regeneration module, the premixing module is used for mixing and conveying slurry, the atomization module is connected with the premixing module and located at the downstream of the premixing module, the atomization module is used for atomizing slurry, the magnetic separation module is connected with the atomization module and located at the downstream of the atomization module, the magnetic separation module is used for capturing and separating magnetic particles, the regeneration module is connected between the premixing module and the regeneration module, and the regeneration module is used for recycling magnetic seed crystals. According to the desulfurization wastewater zero discharge system based on magnetic seed crystal induction disclosed by the invention, a cured product is physically isolated from boiler fly ash while wastewater salt is efficiently cured in flue gas, so that zero discharge of desulfurization wastewater is realized, additional evaporative crystallization equipment is not needed, the magnetic seed crystal can be recycled, and the operation cost is reduced.

The application discloses a kind of converter steel slag grading efficient resource utilization method, comprising the following steps: (1) converter steel slag pretreatment, liquid converter steel slag is sequentially crushed by rolling, hot stew under pressure, rod grinding and impurity removal process to obtain pretreated steel slag;(2) grading screening, pretreated steel slag is graded using a mobile five-layer vibrating screen;(3) product adaptation treatment, 16-63mm products are used as railway ballast;5-10mm, 10-15mm products are used as road asphalt surface layer aggregate;<8 mesh products are used as steel slag sand for rust removal (4) wastewater, dust treatment and metal, waste heat recovery treatment.The application greatly improves the processing efficiency, significantly enhances the stability of the product, has outstanding environmental performance, optimizes waste heat utilization and energy consumption, has high resource utilization rate and added value, and has significant social benefits.

The invention discloses a method and a system for processing heavy soda ash by utilizing nuclear energy combined heat and power generation energy supply, and relates to the technical field of trona production. The method comprises the following steps: pretreating brine to obtain refined brine; carrying out steam stripping decomposition on the refined brine by using nuclear energy combined heat and power generation steam to obtain concentrated brine with Na2CO3 as a main component; the method comprises the following steps: carrying out multiple-effect evaporation on concentrated brine of which the main component is Na2CO3 by using nuclear energy combined heat and power generation steam, wherein Na2CO3 is separated out in a monohydrate sodium carbonate Na2CO3.H2O crystal form; carrying out centrifugal drying treatment on the monohydrate alkali crystal and the mother liquor by utilizing nuclear energy combined heat and power generation electric energy; and calcining the dried material by using nuclear energy combined heat and power generation steam to remove crystal water in the dried material, thereby obtaining the heavy sodium carbonate Na2CO3. According to the invention, the steam production quantity of the nuclear reactor is increased, and the steam power generation quantity of the nuclear reactor is correspondingly reduced, so that a large amount of energy loss generated when low-grade energy is converted into high-grade energy is reduced, and the overall efficiency is improved.

This invention belongs to the field of materials application and resource recycling, and provides a CaCl₂ 2 Purification agents, materials, apparatus, and methods for solutions. This invention utilizes low-value materials, such as seashells, primarily composed of calcium-based materials, as the main component of the crystallizing agent. Natural organic matter, such as wood flour and straw, is used as the carbon source. After mechanical activation and hydrothermal treatment, the crystallizing agent is obtained by calcination under nitrogen protection. This purification material can be used in various CaCl₂ solutions. 2 Applications in solution purification. The crystallization inducer of this invention has mild preparation conditions, inexpensive materials, and strong targeting, enabling low-cost and efficient removal of CaCl₂. 2 Impurities such as sulfate in the solution.

This invention discloses a smart ecosystem for desert soil degradation that synergizes photovoltaic desertification control with the resource utilization of concentrated brine in agriculture. In this invention, industrial solid waste is transformed into multifunctional ecological restoration materials, constructing a stable aggregate structure for desertified soil. Simultaneously, the scientific configuration of salt-tolerant vegetation rapidly establishes a vegetation community adapted to the local environment, effectively curbing wind and sand erosion. The shading effect of the photovoltaic array not only reduces surface water evaporation but also creates a suitable microclimate for vegetation growth, gradually forming a virtuous cycle of soil-vegetation-microorganisms. This fundamentally reverses the desertification process, improves the regional ecological environment, and achieves efficient recycling of various resources through the construction of a complete closed-loop synergistic system. Furthermore, the stable electricity provided by the photovoltaic system not only meets its own operational needs but also drives seawater desalination and concentrated brine separation treatment, transforming concentrated brine into valuable resources for vegetation irrigation and soil improvement, avoiding resource waste and secondary pollution.

The invention discloses a high-frequency defibering-air flotation synergistic waste paper fine screening residue complete recycling system and method, and belongs to the technical field of waste paper pulping and solid waste recycling. According to the system, through a high-frequency defibering unit, an air flotation separation unit, a fiber recovery unit and a slag discharge energy regeneration unit which are sequentially connected in a closed loop mode, complete recycling of fine screening slag is achieved. The method comprises the following steps: carrying out high-frequency defibering on fine screening slag slurry at a specific low concentration (0.5%-1.1%); controlling the slag discharge rate of the air flotation separation unit to be 10-20%, and separating out clean slurry and high-calorific-value scum; concentrating and recycling the clean slurry; and the dehydrated scum is converted into biomass solid fuel with a calorific value of not less than 20MJ / kg or is pyrolyzed to produce gas. According to the invention, a complete industrial closed loop from'waste residue 'to'resource' is formed, efficient recovery (more than or equal to 80%) of fibers, deep removal (more than 90%) of large stickies and energy utilization of scum are synchronously realized, and the problem of treatment and disposal of terminal waste residue in the traditional process is solved.

The preparation method comprises the following steps: dissolving a cesium source, a copper source and an optional doping element source in a mixed solvent consisting of a polar aprotic solvent and organic carboxylic acid according to a volume ratio of (95: 5)-(85: 15) to prepare a clear precursor solution; placing the solution in a rotary evaporator, carrying out rotary evaporation for 30-180 min at a water bath temperature of 80-120 DEG C and a rotation speed of 2-10 rpm, and directly crystallizing in a bottle to obtain a solid product; and washing and drying to obtain the copper-based halide scintillator. The method is simple in process, mild in condition, recyclable in solvent and suitable for macro preparation. The crystal structure of the obtained scintillator is A3Cu2X5: M (wherein A is Cs < + >, X is one or more of Cl <->, Br <-> and I <->, and M is a doping element), and the scintillator has good scintillation performance.

According to the hydrogen lithium thermoelectric oil co-production method for the gas field produced water, comprehensive utilization of the gas field produced water is achieved, photovoltaic power or wind power serves as power, condensate oil in the water is recycled through the sedimentation microfiltration unit, the obtained pretreated water is fed into the deep treatment unit to be treated, demineralized water and strong brine are obtained, and the strong brine is used for lithium extraction of a brine lithium extraction device; the demineralized water is used for hydrogen production of the alkaline water electrolysis device, and waste heat generated in the hydrogen production process is used for evaporation and zero discharge of concentrated water after lithium extraction, so that condensate oil, lithium and waste heat in the produced water treatment and hydrogen production process are recycled, and finally zero discharge of wastewater and closed loop of new energy are realized.

The application relates to the technical field of chemical raw material processing equipment, in particular to a processing and crushing device for calcium thiosulfate; the device comprises a grinding box, a crushing box, a feeding hopper, a tail gas treatment mechanism and a circulating cooling mechanism. The device integrates crushing, grinding, cooling, sealing, inerting and tail gas treatment, has compact structure, occupies small area and can continuously and closedly process the calcium thiosulfate. A U-shaped circulating cooling channel is arranged in the fixed crushing roller, a grinding cooling cavity of the grinding box is also connected with a cooling medium, the crushing area and the grinding area are forcedly cooled, and the materials are effectively prevented from being decomposed due to frictional heat. The top of the crushing box is connected with a tail gas absorption box, a vacuumizing mechanism is arranged, the system is in a micro-negative pressure state, sulfur-containing gas and dust generated during the processing are sucked into the absorption box for treatment, and zero emission is realized.

This invention provides a low-energy-consumption wastewater treatment system for ferric phosphate production, comprising a mother liquor wastewater equalization tank, a wash water wastewater equalization tank, a first pretreatment unit, a second pretreatment unit, a nanofiltration unit, a reverse osmosis unit, and an evaporation unit. The outlet of the mother liquor wastewater equalization tank is connected to the inlet of the first pretreatment unit, the outlet of the first pretreatment unit is connected to the inlet of the nanofiltration unit, and the concentrate outlet of the nanofiltration unit is connected to the inlet of the evaporation unit. Similarly, the outlet of the wash water wastewater equalization tank is connected to the inlet of the second pretreatment unit, the outlet of the second pretreatment unit is connected to the inlet of the reverse osmosis unit, and the product water outlet of the nanofiltration unit is connected to the inlet of the reverse osmosis unit. This invention employs nanofiltration and two-stage reverse osmosis to achieve wastewater reuse while concentrating the wastewater, reducing the investment and operating costs of the evaporator. Furthermore, by evaporating the wastewater, it achieves zero wastewater discharge.

The present application provides a process for treating waste water generated in the process of preparing epichlorohydrin by direct oxidation method, which comprises a pretreatment section, a main reaction section and a deep treatment section; the pretreatment section comprises, in sequence, an adjusting unit, a tubular microfiltration unit, a mild wet oxidation unit and a neutralization unit, the main reaction section comprises an electrodialysis unit, an anaerobic biochemical unit, a biological reinforcement unit, an ozone catalysis I unit, a concentration and salt production system and a methane storage unit; the deep treatment section comprises, in sequence, an aerobic biochemical unit, an ozone catalysis II unit and a BAF unit, and the anion exchange membrane of the electrodialysis unit is a modified anion exchange membrane. The present application solves the problem of high toxicity of chlorine-containing organic matter in waste water by coupling mild wet oxidation with electrodialysis, and realizes the separation of organic matter and salt in waste water, wherein the electrodialysis uses a modified anion exchange membrane, and the anti-pollution capacity is greatly increased. The present application realizes zero discharge of waste water, and has the advantages of low operation cost.

This utility model discloses a filtration and slag removal device for metal dust, including a scraper reducer motor mounted on the top of an upper cover. The scraper reducer motor is connected to a scraper mechanism located inside a filter element. The filter element is installed within the filter body, which includes an inlet, a filter element support plate, a clean water space, an outlet, and a slag-holding funnel. Circulating water enters through the inlet, passes through the filter element, and flows into the clean water space. Dust particles remain in the cavity of the filter element and settle into the slag-holding funnel through the plate holes. The dust particles in the slag-holding funnel are discharged by activating the motor of the spiral auger conveying mechanism. This utility model has the advantages of simple structure, convenient operation, high adaptability, and small space occupation. The entire device can be directly integrated into dust removal equipment. During use, it can be cleaned regularly, reducing the probability of equipment blockage and corrosion, achieving zero wastewater discharge from the dust removal equipment, and improving economic efficiency.

The utility model belongs to the technical field of urban agriculture balcony economic facilities, put forward a kind of modular balcony vegetable three-dimensional ecological system based on landscape ecology, including ladder type three-dimensional water culture frame, the lower portion of ladder type three-dimensional water culture frame is provided with ecological cabin and filter equipment, the ecological cabin is aquatic symbiosis ecological cabin and includes aquatic culture area and land landscape area, the filter equipment is four-stage ecological filter tower, ladder type three-dimensional water culture frame, aquatic symbiosis ecological cabin and four-stage ecological filter tower are connected by pipeline system.The utility model effectively solves the problem of single function, low space utilization of traditional balcony planting system, not only realizes breeding wastewater zero discharge and resource utilization, but also realizes "plant-substrate-water triple purification system", reasonable in design, it is favorable to improve plant configuration disorder, single space level and low ecological efficiency, is suitable for large-scale popularization.

The invention relates to the technical field of industrial solid waste resource utilization and carbon emission reduction technology crossing, in particular to a resource utilization system and method for red mud large-scale synergistic curing of low-purity CO2, and the system comprises a red mud pretreatment unit, a gas-liquid reaction unit, a product separation and modification unit, a resource recovery unit and an intelligent regulation and control unit. Through integrated unit design, full-process efficient cooperation of red mud treatment and CO2 curing is achieved, the red mud pretreatment unit adopts closed conveying and accurate online monitoring, the uniformity and stability of raw material slurry are guaranteed, the system can directly treat CO2 mixed gas (with the purity being 25%-35%) from an industrial kiln and other sources, expensive purification pretreatment is not needed, and the system is suitable for large-scale industrial production. Wherein trace SO2, NOX and other components can promote dissolution of alkaline substances in the red mud on the contrary, a synergistic enhancement effect of treating waste with waste is formed, and the comprehensive cost of carbon capture and solidification is reduced.

The invention discloses high-flame-retardant fireproof biomass composite aerogel as well as a preparation method and application thereof, and belongs to the technical field of thermal insulation materials. The preparation method comprises the following steps: by taking the sea grass as a base material, extracting sea grass cellulose, and matching with chitosan (CS), phytic acid (PA) and kaolin (IM) to construct a ternary synergistic system. Wherein the sea grass cellulose provides a skeleton structure, the chitosan forms a condensed-phase flame-retardant barrier through a charring effect, the phytic acid releases phosphorus free radicals to inhibit gas-phase combustion, and the kaolin serves as an inorganic filler to enhance the physical barrier property. The material has excellent flame-retardant and heat-insulating properties, light weight characteristics and environmental friendliness, and meets the application requirements in the fields of building heat preservation, electronic fire prevention, new energy battery flame-retardant layers and the like.

The utility model provides a condensate water and argon recovery device of a deoxidizing pre-cooler. The condensate water and argon recovery device comprises a gas-water separation module, a liquid collection module and a gas collection module, a water inlet of the gas-water separation module is connected with the deoxidizing pre-cooler; a water outlet of the gas-water separation module is connected with a water inlet of the liquid collection module; a water outlet of the liquid collecting module is connected with a circulating water system; an exhaust port of the gas-water separation module is connected with a gas inlet of the gas collection module; an exhaust port of the gas collection module is connected with a tail gas system; condensed water of the deoxidizing pre-cooler enters the gas-water separation module for gas-water separation, and gas is adsorbed and dried by calcium chloride solid filler in the gas collection module and is discharged to a tail gas system; and the liquid after gas-water separation flows into the circulating water system through the liquid collecting module. Zero emission is realized by recovering water and argon discharged by the deoxidizing pre-cooler; and meanwhile, the argon recovery efficiency is improved, water resource recovery is achieved, the resource utilization efficiency is improved, and economic quality and efficiency improvement are promoted.

The invention discloses a method for high-value utilization of coal gangue and oily sludge. The method comprises the following steps: 1) raw material pretreatment: adding water into coal gangue to prepare slurry, and then conveying the slurry to a ball mill for ball milling treatment; shearing and stirring the oily sludge to a uniform flowing state; (2) size mixing: mixing the pretreated coal gangue with the oily sludge, then carrying out size mixing, and then adding a regulator, an inhibitor and a foaming agent; (3) collaborative flotation: carrying out foam flotation on the pulp subjected to pulp mixing, scraping out a formed mineralized foam layer, and carrying out filter pressing and dehydration to obtain high-calorific-value power fuel; the flotation tailings are directly used for preparing the porous ceramsite after being dehydrated and aged. According to the method, oil substances in the oil-containing sludge are used as the flotation collecting agent to replace a commercial collecting agent, so that the flotation cost is remarkably reduced, and meanwhile, resource utilization of oil in the oil-containing sludge is realized; and meanwhile, oil in the oily sludge serves as an'in-situ 'collecting agent and makes contact with coal gangue carbon more sufficiently, the collecting efficiency is high, and the carbon recovery rate can be increased easily.

This invention belongs to the field of polyaluminum chloride preparation technology and discloses a method for preparing polyaluminum chloride from aluminum ash by cyclone atomization denitrification treatment. The method includes continuously and quantitatively feeding aluminum ash into a cyclone atomization reactor; forming a cyclone field within the reactor and spraying atomized water into the cyclone field, allowing the aluminum ash and atomized water to fully contact in a gas-solid cloud dynamic field, resulting in a hydrolysis reaction to generate aluminum hydroxide and ammonia; controlling the amount of water added to maintain a water-to-aluminum ash mass ratio of 0.1-0.5:1, and maintaining the reaction system temperature at 70-120℃; drawing the ammonia-containing tail gas generated by the hydrolysis reaction from the top of the cyclone atomization reactor and sending it to an ammonia absorption tower for multi-stage absorption; enhancing mass transfer through cyclone atomization, resulting in an extremely high hydrolysis conversion rate of aluminum nitride in the aluminum ash, reducing the ammonia nitrogen content of the polyaluminum chloride product; and completely eliminating the large amount of salt- and ammonia-containing wastewater generated by traditional water washing processes by precisely controlling the water-to-aluminum ash ratio to be near the stoichiometric ratio of the chemical reaction, without adding excess process water.

This invention relates to the field of energy recovery and reuse technology, and in particular to a waste heat recovery system for a deaerator in a cigarette factory's gas-fired boiler. The system includes a steam heat exchange loop, a bathing water heat exchange loop, and a softened water heat exchange loop. The steam heat exchange loop is sequentially equipped with a deaerator, a second valve, a first heat exchanger, a third valve, a second heat exchanger, a fifth valve, and a return water tank. The bathing water heat exchange loop and the softened water heat exchange loop form closed loops with the cold sides of the first and second heat exchangers, respectively. The system can also be supplemented with a first valve and a fourth valve, allowing for switching between series and parallel operation modes of the heat exchangers through valve on / off coordination. This invention employs a two-stage heat exchange and cascade utilization process. The series mode adapts to normal steam operating conditions to achieve deep waste heat recovery, while the parallel mode adapts to high steam load conditions to achieve heat load diversion. This enables zero secondary steam discharge from the deaerator, achieving dual recovery of heat energy and water resources.

The utility model provides a smoke pollutant near-zero-emission full-dry-method treatment system based on ultra-clean electric precipitation. The smoke pollutant near-zero-emission full-dry-method treatment system is composed of a smoke system, an activated carbon system and a desulfurization byproduct preparation system. The flue gas system comprises a flue system, an ultra-clean electric precipitation system, a heat exchange system and a nitrogen oxide circulating system; the activated carbon system comprises a desulfurization and denitrification system, an activated carbon desorption and regeneration system and an activated carbon transportation system. The flue gas is subjected to dust removal, desulfurization, denitration and other processes, so that near-zero emission of pollutants is achieved, and no secondary pollution is generated after the whole flue gas treatment process is finished; the desorbed desulfurization by-product can be prepared into commercial salt or sulfuric acid for sale according to requirements, and the desorbed nitric oxide returns to the hearth to inhibit the generation of new nitric oxide. The system integrates various flue gas pollutant treatment technologies such as ultra-clean electric precipitation, activated carbon low-temperature adsorption desulfurization and denitrification, activated carbon desorption regeneration and nitrogen oxide furnace returning, the flue gas pollutant treatment efficiency is improved, meanwhile, secondary pollutants are thoroughly eliminated, and full-dry-method near-zero emission of flue gas pollutants is achieved.

This utility model belongs to the technical field of ethanol distillation equipment, specifically relating to an ethanol heat pump distillation device, comprising: a distillation column having a liquid inlet, a gas outlet, and a liquid outlet, with a reboiler outlet and a reboiler inlet between the liquid inlet and the liquid outlet; a liquid inlet pipe connecting the liquid inlet and the mother liquor inlet; a first discharge pipe connecting the gas outlet and the finished product outlet, wherein a compressor and a coupled reboiler are sequentially connected along the fluid direction between the gas outlet and the finished product outlet in the first discharge pipe; a second discharge pipe connecting the liquid outlet and the wastewater outlet; and a reboiler pipe connecting the reboiler outlet and the reboiler inlet at both ends, with a coupled reboiler connected between the reboiler outlet and the reboiler inlet, so that the medium at the compressor outlet constitutes the heat source for the coupled reboiler. This utility model uses a compressor to pressurize and heat the low-temperature steam at the top of the column, using it as the heat source for the reboiler in the column bottom, thus realizing the recovery and utilization of latent heat of condensation. Compared with traditional processes, heat pump distillation can reduce steam consumption by 40% to 80%.