40results about How to "Achieve emissions" patented technology

The utility model relates to the technical field of master batch machines, and discloses a double-color master batch machine which comprises an installation shell, a control display panel is fixedly installed on the front face of the installation shell, two sets of fixed partition plates are fixedly installed on the inner wall of the installation shell, and annular holes are formed in the tops of the fixed partition plates. And two groups of supporting frames are fixedly mounted at the top of the mounting shell. A motor I is arranged to drive a pinion to rotate, so that a first bull gear and a second bull gear which are meshed with the pinion are driven to synchronously rotate, independent and synchronous rotation of two heating and stirring barrels is realized, and heating resistance wires are uniformly distributed on the outer walls of the heating and stirring barrels in a matched manner, so that rapid and uniform heating of raw materials is ensured; and the motor II forcefully stirs the raw materials through the stirring rod and the anchor type stirring rod, so that the raw materials are fully mixed, and the effects of improving the stirring efficiency and the quality uniformity of the master batch are achieved.

This invention relates to the application of electromagnetic shielding composite materials, specifically to an electromagnetic shielding composite film with a gradient structure and its preparation method. Using a polymer film as the core layer, electromagnetic functional layers are sequentially deposited on both sides of the polymer core layer, and a carbon fiber felt is composited on at least one side, resulting in an electromagnetic shielding composite film with excellent electromagnetic shielding performance. The gradient multilayer structure design of this invention utilizes the principles of impedance mismatch at different interfaces and the skin effect to effectively improve the multiple reflections of electromagnetic waves between different functional layers. Furthermore, the type of polymer core layer can be changed according to different needs; using a polymer-based high-barrier film as the core layer can yield a high-barrier electromagnetic shielding packaging film that combines high barrier properties with high electromagnetic shielding.

The utility model discloses pressure test detection equipment for valve production and processing, which comprises a support frame, a clamping assembly is arranged on the support frame, the clamping assembly comprises an air cylinder and a moving plate, the air cylinder is arranged on the support frame, the moving plate is connected to the output end of the air cylinder, a fixed plate is arranged on the support frame, and the fixed plate is connected to the output end of the air cylinder. The fixed plate and the movable plate are each provided with a connecting pipe, the number of the connecting pipes is two, one connecting pipe is connected with a water inlet hose, the water inlet hose is provided with a removing assembly, the removing assembly comprises a fixed sleeve and a movable ring, the fixed sleeve is installed on the water inlet hose, and the movable ring is installed on the fixed sleeve. And the movable ring is slidably connected to the fixed sleeve, so that the technical problem that in the prior art, when existing pressure test detection equipment is used for valve detection, once a valve needs to be replaced in the detection process, a rapid clamping and releasing mechanism is lacked, and the continuous operation capacity and procedure connection are seriously affected is solved.

This invention provides a waste pyrolysis gas combustion device and its combustion method, belonging to the field of waste treatment technology. The invention includes: a shell, foam ceramic balls, a central tube, a preheater, a mixing tube, a co-firing air sleeve, and a flow-dispersing component. This invention uses foam ceramic balls as a heat storage carrier in conjunction with a preheater to achieve stable ignition of pyrolysis gas with low calorific value fluctuations, effectively adapting to the combustion requirements of waste pyrolysis gas with low calorific value and parameter fluctuations, and improving combustion stability. The flow-dispersing component in the mixing tube enhances gas-gas mixing, improving combustion efficiency and pollutant control, increasing combustion completeness, reducing pollutant generation, and optimizing combustion efficiency. The compact structure of the nested central tube and mixing tube with annular slot air intake achieves efficient space utilization and integrated application, realizing precise gas distribution and efficient mixing within a limited space. The overall layout of the device is compact and easy to integrate.

This utility model relates to an ammonia fuel regenerative combustion device, belonging to the field of energy conservation and emission reduction. It includes an ammonia fuel regenerative chamber and a combustion-supporting chamber, both connected to the furnace via connecting ports. The ammonia fuel regenerative chamber is equipped with a three-way reversing valve for introducing ammonia fuel and discharging flue gas. The ammonia fuel regenerative chamber contains an ammonia cracking regenerative body, a denitrification reducing agent injector, and a denitrification regenerative body. The porosity of both the ammonia cracking and denitrification regenerative bodies gradually decreases along the flue gas outflow (ammonia inflow) direction. The combustion-supporting chamber has a combustion-supporting gas inlet. The angle of the denitrification reducing agent injector is adjustable. An ammonia cracking catalyst is mounted on the ceramic skeleton of the ammonia cracking regenerative body. An SCR reduction catalyst is mounted on the ceramic skeleton of the denitrification regenerative body. This utility model can improve flame stability, increase ammonia cracking efficiency and denitrification efficiency, and reduce NO₂ levels in the combustion device. x Emissions will be reduced to achieve zero carbon emissions from the heating furnace.

The invention discloses a metal scrap compression device based on metal recovery, and relates to the technical field of metal recovery. Comprising a supporting table, a compression mold and an upper support are installed above the supporting table, the middle of the upper support is slidably connected with a translation support, the middle of the translation support is rotationally connected with a rotary discharging port and a driving shaft, and the rotary discharging port and one end of the driving shaft are fixedly connected to a rotary driving assembly; the rotary driving assembly synchronously drives the rotary discharging opening and the driving shaft to rotate, the rotary discharging opening rotates by a circle above the compression mold, metal chippings can be evenly spread in the radius direction of the mold, and local accumulation is avoided. Meanwhile, the driving shaft drives the vibrating wheel to rotate, and the vibrating boss on the vibrating wheel periodically extrudes the T-shaped plate, so that the T-shaped plate repeatedly knocks the side wall of the mold, vibrates the internal chippings, prompts the chippings to fall down to fill gaps, and enables the chippings to be distributed more uniformly and compactly before being compressed, thereby improving the density and uniformity of a final compressed block.

The invention discloses high-flux electrolyte preparation equipment and a testing method thereof, and relates to the technical field of chemical preparation equipment, the high-flux electrolyte preparation equipment comprises a top cover and a bottom plate, the top cover and the bottom plate are spliced through an aluminum alloy supporting column, a lifting frame is arranged on the inner side of the aluminum alloy supporting column, and a lifting door plate is arranged on the lifting frame; a pump frame is fixedly installed at the bottom of the bottom plate, a vertical linear guide rail is arranged on the surface of the top of the top cover, a transverse linear guide rail is movably arranged on the top of the vertical linear guide rail, a testing assembly is arranged on the transverse linear guide rail, and an injection assembly is arranged on the transverse linear guide rail. According to the high-flux electrolyte preparation equipment, a plurality of groups of liquid injection heads are adopted, so that the preparation of a plurality of groups of electrolytes with different formulas and different concentrations can be synchronously completed at a time, and compared with the traditional manual preparation, the efficiency is greatly improved. And the research and development period and the production preparation time are greatly shortened.

The invention relates to an electromechanical machine for converting animal skins into leather, consisting of a machine intended to participate in one or more steps of a process for converting any animal skins into leather. The machine is characterized in that it comprises: a main tank (1) in which the animal skin (3) is immersed in a treatment fluid, called syrup (2), containing one or more additives; an impeller suction motor pump (4) circularly conveys the syrup (2) through a water outlet pipe (5) to a reversing valve (5.1), the reversing valve guides the syrup (2) to one or more filters (6), guides the treatment fluid to a heater (7) or a bypass pipe (5.3), and finally reaches a group of storage tanks (8), and the storage tanks (8) are connected with the water outlet pipe (5). The filter is preferably a slow sand type filter, a decanter type filter, a settling tank type filter, an ozone or UVC ultraviolet radiation disinfection type filter, a zeolite type filter, an activated carbon type filter, an anthracite type filter, a silicon dioxide type filter, an argenite type filter or a copper ion generator type filter, and an opening / closing valve (5.2) is arranged on a pipeline behind the reversing valve (5.1). The syrup (2) is then stored and then discharged into the main tank (1) via a return line (5.4). The machine is provided with a gear motor (9), and the gear motor transmits power through a rotating shaft (10) provided with a clamp (13) at the end. The clamp is arranged opposite to another same clamp (13) mounted on the sliding shaft (11); the machine is provided with a fixed stop block (15.1) fixedly connected with the main tank (1) and a movable stop block (15) fixedly connected with the sliding shaft (11); a spiral spring (14) is mounted between the two stop blocks; when the length of the spiral spring changes, the spiral spring can control the reversing device (16), and then the rotating direction of the gear motor (9) is adjusted. The machine is provided with a programmable central computer, and the computer is controlled according to the required characteristics of each animal skin in the aspects of color, tanning agent type, fatliquoring agent type, fixing agent type and the like.

The utility model belongs to solid waste resource utilization technical field especially relates to a kind of production system for preparing high-purity magnesium sulfate with solid waste magnesite slurry, it is characterized in that, including solid waste pretreatment unit, reaction kettle, separation unit, drying unit and circulation unit, solid waste pretreatment unit includes crusher and bunker, reaction kettle is lined with enamel, with frequency conversion stirrer and temperature controller, reaction kettle is connected with high-position sulfuric acid tank outlet, high-position sulfuric acid tank is connected with sulfuric acid batching tank by pipeline, sulfuric acid pump, separation unit includes first stage electric centrifuge and second stage electric centrifuge, two-stage electric centrifuge between magnesium sulfate tank and crystallization tank are equipped, circulation unit includes PE mother liquor tank and mother liquor pump, final product is magnesium sulfate heptahydrate or anhydrous magnesium sulfate with water content≤0.5%.The utility model has the advantages that:low-activity solid waste magnesite slurry is converted into >99% purity magnesium sulfate, realizes solid waste high-value utilization conversion, and "zero" wastewater discharge is achieved in whole process.

This invention provides a heat exchanger and an air conditioner. The heat exchanger includes: a heat exchanger body, on which a condenser inlet manifold and a condenser outlet manifold are provided; multiple refrigerant inlets and multiple refrigerant outlets, the multiple refrigerant inlets and outlets being located on the heat exchanger body, and the multiple refrigerant inlets being connected to the condenser inlet manifold; wherein the number of multiple refrigerant inlets is greater than the number of multiple refrigerant outlets. Embodiments of this invention increase the mass flow rate of the refrigerant in the low dryness zone, thereby improving the heat transfer effect.

The utility model belongs to gas -cooker technical field discloses auxiliary cooking assembly and gas -cooker. Auxiliary cooking assembly includes the enclosure and the pot cover, and the enclosure is the hollow structure of two ends opening, and the first end of enclosure can be with support assembly insertion joint cooperation, and the pot cover can cover set up on the enclosure to form the cooking cavity with exhaust port, and the cooking cavity is used for accommodating the cooking utensil placed on the support assembly. The cooking cavity with exhaust port is constructed through the cooperation of pot cover and enclosure, and the exhaust emission is effectively realized. Moreover, the cooking cavity wraps the cooking utensil, effectively reduces the heat loss, improves the heat energy utilization efficiency and the cooking utensil heating uniformity, thereby improves the cooking efficiency and the food material taste stability. Moreover, the enclosure cooperates with the support assembly through the detachable connection mode, and the structure is simple, the adaptability is strong, can be integrated with the existing gas -cooker conveniently, has good commonality and practicality.

The invention discloses a vehicle air supply system with a condensate water discharging function and a control method. The vehicle air supply system comprises an air pump device, at least one air storage body, at least one liquid storage bin, an air supply valve assembly, a first control valve assembly and a waste discharging valve assembly. The air pump device communicates with an air inlet of the air storage body, and an air outlet of the air storage body supplies air to the air using device through the air supply valve assembly. A low-position discharge outlet is formed in the lower part of the gas storage body, the low-position discharge outlet is communicated with the cavity of the liquid storage bin through a first control valve assembly, and condensate water in the gas storage body is collected in the cavity of the liquid storage bin when the first control valve assembly is opened; the waste discharge valve assembly is connected to the lower end of the liquid storage bin, and under the condition that the first control valve assembly is closed, the waste discharge valve assembly can be opened to discharge accumulated water in the cavity of the liquid storage bin. According to the vehicle air supply system, the risk that condensate water corrodes and blocks the air storage body and the like can be reduced, and it is guaranteed that the air supply pressure is stable.

The application provides a method for synchronously preparing a metallurgical dephosphorizing agent by gasifying flue gas of a calcium-based reinforced metallurgical furnace and desulfurizing flue gas, and belongs to the technical field of metallurgical energy-saving and environmental protection. The method uniformly loads calcium-based materials on coal gasification raw materials through pretreatment loading, sprays the calcium-based materials into a metallurgical furnace gasification flue through a spraying system on the metallurgical furnace gasification flue, realizes coal gasification under the action of high-temperature flue gas, and the loaded calcium-based materials play a role in strengthening organic fuel cracking gasification in the process. Meanwhile, sulfur-containing flue gas released by the organic fuel is solidified by the calcium-based materials, the solidification products enter a dust removal system with dust, the calcium-based materials react with iron-containing components in the dust in the metallurgical furnace gasification flue to generate calcium ferrite with dephosphorizing metallurgical performance, and the calcium ferrite enters the dust removal system with the dust. The collected dust removal ash is used for high-value dephosphorizing agent production after being separated and purified through magnetic separation, and provides an effective way for the sustainability and economical production of the metallurgical industry.

The invention relates to the technical field of Maotai liquor distillation and condensation equipment, in particular to a water-saving and energy-saving heat exchange device for the Maotai liquor industry and a control method.The device comprises a condensation tank, an air flow guide column and a heat exchange pipe, the air flow guide column and the heat exchange pipe are vertically arranged in the condensation tank, and the heat exchange pipe is of a spiral structure approximately; the rotational flow radius of the heat exchange tube is periodically changed; the air guide column is located in the middle of the heat exchange pipe, and an air guide blade is arranged at the lower end of the air guide column and located below the heat exchange pipe. The lower end part of the condensation tank is provided with an air flow inlet and a water outlet, and the top is provided with an exhaust port; a cooling water spraying part is arranged in the condensation tank and is positioned at the middle lower part of the heat exchange tube; the upper end of the heat exchange pipe is communicated with a wine steam input pipe, the lower end of the heat exchange pipe is communicated with a cooled wine discharge pipe, and the problems of high energy consumption and high water consumption generally existing in the traditional wine brewing industry are solved.

The condenser comprises a condensation channel, an air inlet channel, an air outlet channel and a fan, the condensation channel is provided with an air inlet, the air outlet channel is provided with an air outlet, and the condensation channel, the air inlet channel and the air outlet channel are sequentially communicated. The fan is located at the joint of the air inlet channel and the air outlet channel, and a plurality of condensation plates are arranged in the condensation channel at intervals. The condenser is provided with a condensation channel, a condensation plate is arranged in the condensation channel, steam sucked in by the air inlet is cooled to form condensed water after making contact with the condensation plate, and the condensed water can flow back to the inner container or the respirator from the air inlet and can be used for cooling the steam at the air inlet; cooled gas sequentially passes through the air inlet channel and the air outlet channel and then is exhausted to the outside from the air outlet, so that the exhausted gas does not contain water vapor, the condensation effect of steam is improved, and zero steam emission is achieved.

This invention provides a composite cementitious material with high rheological properties, its preparation method, and concrete, comprising an active admixture, 40%–60% ordinary Portland cement, 20%–35% modified marble powder, and 0.8%–2% functional admixtures. The modified marble powder is obtained by surface modification treatment of marble powder with a silane coupling agent and a polycarboxylate superplasticizer, effectively solving the problem of marble powder agglomeration and ensuring uniform dispersion in the cementitious system. This significantly optimizes the rheological properties of the paste, improving fluidity and pumpability. The synergistic effect of cellulose ether and air-entraining agent in the functional admixtures further enhances the material's water retention and anti-segregation stability. The cementitious material prepared by this invention possesses both excellent mechanical properties and durability, and the concrete prepared with it exhibits good workability, dense structure, and reliable long-term performance. Simultaneously, this technology achieves high-value-added resource utilization of marble waste, reduces cement consumption and carbon emissions, and aligns with the direction of green building materials and sustainable development.

The application discloses a method for preparing high-performance rare earth polishing powder from lanthanum cerium sulfate, and belongs to the technical field of rare earth polishing powder preparation. The method mainly comprises the following steps: precipitating lanthanum cerium sulfate solution and magnesium bicarbonate solution in a parallel flow feeding mode. The precipitated product is aged, washed, once separated from liquid, beaten, fluorinated, twice separated from liquid, dried at low temperature, calcined at high temperature, and broken and classified by air flow milling, so that a rare earth polishing powder product with good polishing and etching capacity is successfully prepared. The application selects lanthanum cerium sulfate as the original liquid, has a short separation process, low transformation cost, and is easy to popularize and promote in industrialization. The residual part of sulfate in the precipitated product can effectively adjust the hardness of the rare earth polishing powder particles and homogenize the morphology, so as to improve the cutting performance of the polishing powder. The magnesium salt wastewater and the fluorination wastewater generated in the application can be all reused to the production line for preparing the rare earth polishing powder, and zero wastewater discharge is realized in the whole process.

The invention provides horizontal rotational flow and wet electricity coupling integrated ultra-low emission purification equipment and method.The horizontal rotational flow and wet electricity coupling integrated ultra-low emission purification equipment comprises a shell, a rotational flow purification chamber, a tempering and dewatering chamber and a one-stage or multi-stage horizontal electric field chamber are sequentially arranged in the shell in the length direction of the shell, partition plates are arranged in the cyclone purification chamber and divide the cyclone purification chamber into a plurality of cyclone purification cavities, each cyclone purification cavity is internally provided with a multi-stage small cyclone vortex, and each multi-stage small cyclone vortex comprises a plurality of volutes which are sequentially connected and are used for removing viscous or scaling components in flue gas or dirty air under the action of cyclone; compared with the prior art, the ultra-low emission purification equipment has the following beneficial effects that the simple pretreatment device and the wet electric dust collector are coupled and integrally arranged, and the purification unit is simple in structure and convenient to operate and manage; on the premise of ensuring the ultra-low emission environmental protection index, the stage number of the electric field chamber is saved, and the equipment investment is also reduced.

The application provides a catalyst, a preparation method and use thereof, and the catalyst comprises a carrier, a first support and a second support; the first support comprises a first oxygen storage material, a titanium-aluminum composite oxide and a first active alumina, and a first active component is loaded on the first support; the second support comprises a second oxygen storage material and a second active alumina, and a second active component is loaded on the second support; the first active component is platinum and / or palladium; and the second active component comprises rhodium. The catalyst of the application has high conversion rate, can effectively purify harmful substances such as low-carbon alcohols, low-carbon aldehydes and low-carbon acids in automobile exhaust, and thus realizes low-pollutant emission and clean combustion.

This utility model relates to the field of drainage technology for gas storage systems, and particularly to an automatic drainage valve structure driven by cavity pressure difference. It includes a hot-plug nut, with a drainage end cap connected inside the nut. One end of the drainage end cap has a second drainage hole. A valve body is slidably connected inside the nut, and a valve core block is disposed inside the valve body. The surface of the valve core block has an installation hole and a first drainage channel, and an umbrella-shaped one-way valve is installed inside the installation hole. This utility model, by setting an umbrella-shaped one-way valve and a valve core block that cooperates with the drive column to seal the plug, achieves automatic collection and discharge of condensate from the gas storage tank, eliminating the need for external electrical control or manual operation, thus improving the timeliness of drainage and the reliability of system operation. This structure utilizes the pressure difference change between the gas storage tank and the water storage chamber to drive the water discharge action, and automatically resets by a spring after the pressure difference disappears, forming a complete self-circulating drainage process.

The present application relates to a kind of gas generator test system and method for gas self-pressurized liquid rocket engine, solve the technical problem that gas generator can hardly produce matching liquid attitude control rocket engine gas flow under different working conditions.The system includes propellant supply system, propellant weighing and metering system, gas generator, gas cooling system and gas discharge valve group, gas discharge valve group includes multiple sets of gas discharge solenoid valve, and the outlet of at least one set of gas discharge solenoid valve is provided with exhaust orifice plate.The method includes:1, gas generator builds pressure;2, gas generator and gas self-pressurized liquid rocket engine are matched with working condition, obtain the matching relationship of gas generator gas flow and pressurized propellant flow and the matching relationship of gas flow and gas self-pressurized liquid rocket engine;3, test system is depressurized, and test is ended.

This invention discloses a method for detoxifying chromium corundum, comprising: feeding chromium corundum sequentially into a jaw crusher and a column mill for pulverization; feeding the pulverized chromium corundum into a mixer, spraying a composite reducing agent and mixing the mixture to obtain a homogeneous mixture; subjecting the mixture to gradient heating reduction under an inert atmosphere, followed by cooling; and discharging the cooled mixture into ton bags and allowing it to stand for a period of time to obtain detoxified chromium corundum. This invention improves production efficiency through a simplified process and significantly increases the reduction rate of hexavalent chromium by adding a composite reducing agent with strong penetrating and anti-reoxidation properties, while achieving zero wastewater discharge. This improves the resource utilization rate of detoxified chromium corundum and reduces processing costs. The detoxified chromium corundum can be used as a resource in refractory materials, abrasives, and functional fillers.

The application discloses a lime kiln gas purification and dust removal device, which comprises a purification tank, an air inlet pipe, a conical block, a first conical filter hopper, a second conical filter hopper, an annular pipe, an atomizing nozzle, a water pump and a lifting plate. The kiln gas is evenly distributed in the purification tank through the conical block, the first conical filter hopper and the second conical filter hopper are used for two-stage filtration of dust and impurities, the sodium hydroxide solution is atomized and sprayed into the kiln gas through the atomizing nozzle, harmful gases in the kiln gas are effectively absorbed, the used sodium hydroxide solution is collected through the lifting plate and recycled, resources are saved and pollution is reduced, the solid impurities on the inner walls of the first conical filter hopper and the second conical filter hopper are scraped and cleaned through the setting of a scraping rod and an obliquely arranged rod, the lime kiln gas can be effectively purified, and the pollution to the environment is reduced.

The application relates to the technical field of hydrogen sulfide preparation equipment, in particular to a method and system for preparing high-purity sodium hydrosulfide. The system takes sulfur-containing hydrogen sulfide acidic gas as raw material, controls the generation of impurities through one of a steam contact section, a first gas-liquid contact section, a second gas-liquid contact section and a third gas-liquid contact section, deeply absorbs and controls the escape of hydrogen sulfide through a horizontal gas-liquid reactor of a two-section combined reaction part, and circulates and uses sodium-containing alkaline liquor introduced by a boundary sodium-containing alkaline liquor introduction pipe of a two-section circulation part, so as to reduce the exogenous impurities of the sodium-containing alkaline liquor, accurately control and prevent the reaction imbalance between the sodium-containing alkaline liquor introduced by the boundary sodium-containing alkaline liquor introduction pipe and the acidic gas discharged by the one-section combined reaction part, finally realize the preparation of high-purity sodium hydrosulfide and the synchronous realization of low-sulfur hydrogen sulfide content purified tail gas emission, and the system does not need to additionally add impurity removal reagents or tail gas treatment reagents, and conforms to the design concept of green chemical industry.

The invention belongs to the technical field of preparation of perfluorinated sulfonic acid resin, and particularly relates to a bipolar membrane electrodialysis device for preparing a perfluorinated sulfonic acid resin solution and a preparation method. The device comprises an electrolytic bath, an anode plate arranged at one end of the electrolytic bath, a cathode plate arranged at the other end of the electrolytic bath, and an anode chamber, a bipolar membrane assembly and a cathode chamber which are arranged between the anode plate and the cathode plate, wherein the anode chamber and the cathode chamber are connected in series; the bipolar membrane assembly comprises a bipolar membrane, an acid chamber, a cation exchange membrane and an alkali chamber. According to the preparation method of the perfluorosulfonic acid resin solution, the bipolar membrane electrodialysis device is used for transformation preparation of the perfluorosulfonic acid resin solution for the first time, a bipolar membrane is used for directly dissociating water to generate H < + > and OH, the perfluorosulfonic acid resin solution is transformed into the perfluorosulfonic acid resin solution through a one-step method, and compared with a traditional method, the preparation method has the advantages that the cost is low, and the efficiency is high. According to the method disclosed by the invention, the transformation rate and the yield are greatly improved, the time cost and the labor cost are greatly saved, and pollutant-free emission can be realized.

The invention relates to the technical field of separation and extraction of natural products, in particular to a method for supercritical separation and extraction of astaxanthin, which comprises the following steps: (1) weighing raw material components in parts by weight; (2) mixing a biomass raw material rich in astaxanthin with the functionalized deep-eutectic solvent, and performing physical field enhanced extraction to obtain an extracting solution; (3) filtering the extracting solution through a vibrating membrane, and purifying to obtain a trapped fluid containing astaxanthin; and (4) carrying out supercritical CO2 back extraction on the trapped fluid, separating to obtain an astaxanthin product, and recovering the functional eutectic solvent. According to the method, continuous membrane separation and purification under the eutectic solvent system are realized, the purity of astaxanthin and the proportion of all-trans astaxanthin are maintained while the extraction rate of astaxanthin is increased, the solvent can be recycled after being recovered, and the production cost and waste liquid discharge are greatly reduced. All the raw materials are nontoxic and harmless, no organic solvent is used in the technological process, and good application prospects are achieved.

The application discloses a sewage treatment device for preventing and treating water pollution in a papermaking industry, relates to the technical field of preventing and treating water pollution in the papermaking industry, and aims to solve the problems of high energy consumption and the need for continuous human flocculant deployment when an aeration tank and a flotation scraper assembly are used for papermaking sewage treatment, and the problems of affecting the overall sewage treatment efficiency. The application is characterized in that a motor drives a work disc to rotate, a cam block is in contact with a piston column on a gas cavity, gas is continuously pressed into the bottom of a sewage treatment tank, and suspended impurities are taken to the liquid surface while the gas bubbles are formed and come out, the work disc rotation drives the rotation of a transition frame upper rotating arm II, thereby driving the sliding of the entire sliding block in the sewage liquid surface, and when the scraper installed on the sliding block moves in a cycle, the unilateral downward movement of the scraper scrapes the impurities, the unilateral upward movement of the scraper prevents the contact of the impurities with the liquid surface, the impurities on the liquid surface are continuously scraped to one side, the impurities on the sewage liquid surface are uniformly taken into a filter cavity, and the treatment of the suspended matter in the sewage is completed.

The utility model discloses a device for discharging solid magnesium chloride for multiple times by utilizing a separator. The device consists of two parts, namely the separator and a support frame, the separator is composed of two partition plates which are arranged on a supporting plate and are crossed in a cross shape, a lifting lug is arranged at the intersection of the two partition plates, and W-shaped grooves are formed in the ends of the partition plates. According to the supporting frame, four reverse W-shaped grooves are formed in the inner wall of a cylinder, a flange is arranged on the upper edge of the cylinder, and three lifting lugs are arranged on the flange. And the W-shaped groove formed in the separator is matched with the inverted W-shaped groove formed in the support frame, so that the separator and the support frame are assembled together. According to the utility model, solid magnesium chloride is continuously discharged for multiple times during reduction production of sponge titanium; the hoisting times of the crown block are reduced, and the labor intensity of workers is reduced; the structure is simple and operation is easy.

The utility model discloses a manhole cover with a methane concentration detection function, which comprises a pre-embedded body, an upper cover body is clamped at the top of the pre-embedded body, a lower cover body is fixedly connected with the bottom of the upper cover body through a connecting block, water inlet holes are uniformly formed in the surface of the upper cover body, and water outlet holes are uniformly formed in the edge part of the lower cover body. An assembling cylinder is integrally formed in the center of the lower cover body, a fan is fixedly assembled in the assembling cylinder, and a control mechanism is detachably and fixedly assembled at the bottom of the assembling cylinder. The cover body is in a plane design, vehicles and pedestrians can pass through the cover body conveniently after assembly is completed, the cover body is suitable for more assembly environments, meanwhile, the lower cover body is designed to be convex in the middle, rainwater can be effectively prevented from flowing backwards into the assembly cylinder in the drainage process, and a fan in the assembly cylinder and a control mechanism below the fan are protected to a certain degree.

This invention provides a low-carbon, non-fired brick made entirely from solid waste and its preparation method, belonging to the technical field of solid waste resource utilization and low-carbon building materials. The non-fired brick is made from specific weight parts of industrial solid waste raw materials, including 30-45 parts steel slag, 30-45 parts blast furnace slag, 10-40 parts calcium carbide slag, and 20 parts water. The preparation method includes: mixing and stirring the above raw materials into a slurry, pressing it into brick blanks, then placing the brick blanks in a carbonization curing chamber, introducing CO2 industrial waste gas at a pressure of 0.1 MPa for 4-24 hours of carbonization curing, and finally transferring them to a constant temperature and humidity environment for 26-28 days of conventional curing. This method utilizes the calcium carbonate and silica gel generated during the carbonization process to construct an early strength framework, and further optimizes the microstructure through the synergistic hydration reaction of the solid waste components during subsequent curing. The resulting non-fired brick has excellent mechanical properties, good durability, and significant carbon fixation effect, while achieving low-cost production.