1709results about "Solution crystallization" patented technology

The invention provides a method for recovering a BHET monomer from a waste polyester textile alcoholysis solution, and is characterized in that the recovery method comprises the following steps: (1) filtering: mixing the waste polyester textile alcoholysis solution with water under a stirring condition, and filtering at 55-70 DEG C; and (2) cooling crystallization: under a stirring condition, carrying out primary cooling on the filtrate obtained by filtering in the step (1) from 55-70 DEG C to 45-55 DEG C, then adding a BHET seed crystal, then carrying out secondary cooling to 5-15 DEG C, and maintaining the temperature for 20-60 min to obtain the BHET monomer. The mixed solution cooling crystallization method is developed on the basis of complexity of components of the waste polyester textile fabric, the problems that in the conventional production process, a BHET crystal product is low in quality, prone to scaling, difficult to filter and dry and the like are solved, and the obtained BHET product is large in particle size, narrow in particle size distribution, high in purity, good in fluidity and high in stability.

The invention relates to the technical field of fluorination processes, in particular to a purification method of a high-purity fluorocarbonate-based solvent, which comprises the following steps: S1, introducing fluorocarbonate-based solvent crude gas into a purification cavity, and liquefying the crude gas through a liquefaction separation module; s2, separating the liquid obtained in the step S1, conveying the separated liquid into a crystallizing pond, cooling the liquid in the crystallizing pond to enter a crystallization critical state, rotating the rotating crystal plate group in the crystallizing pond, crystallizing the liquid on the surface of the rotating crystal plate group, and continuously collecting crystals above the crystallizing pond through a collecting assembly; and S3, washing and filtering the crystals collected in S2 to obtain the high-purity fluorocarbonic ester-based solvent. According to the purification method of the high-purity fluorocarbonate-based solvent provided by the invention, crude gas is liquefied by adopting the liquefaction module, and then the liquefied liquid is continuously crystallized and collected by adopting the rotary crystallization module, so that the high-purity fluorocarbonate-based solvent can be efficiently and simply prepared, and the purification method has good industrial value.

The invention relates to the technical field of nitrate production, in particular to a potassium nitrate purification device which comprises a dissolving tank, a filtering device, a crystallization kettle, a centrifugal machine and a drying machine with a steam jacket which are sequentially connected in series through pipelines. The dissolving tank first jacket is connected with a heat source through a circulating pipeline; a liquid outlet of the centrifugal machine is sequentially connected with the cyclone separator, the ceramic membrane filter, the cationic resin column, the first temporary storage tank and the heat source, and the first heat exchanger and the second heat exchanger are sequentially installed between the first temporary storage tank and a heating medium inlet of the heat source. A steam outlet pipeline of the steam jacket is connected with a heat medium inlet of the first heat exchanger, the first heat exchanger is connected with the second temporary storage tank through a pipeline, and the second temporary storage tank is connected with the heat source through a pipeline. A pipeline of the second vacuum unit is connected with a thermal medium inlet of a second heat exchanger, and the second heat exchanger is connected with a second temporary storage tank. According to the method, the potassium nitrate purification efficiency, the product purity, the resource utilization rate and the energy economy are synergistically improved.

The invention provides a cooling rate optimization control method and system for continuous cooling crystallization, and the method comprises the steps: collecting crystal slurry concentration data and temperature data of each stage of crystallization tank in real time; the crystal slurry concentration data, the temperature data and the feeding flow data are input into a deep learning model, and a prediction result is obtained; based on the prediction result and crystal mush concentration data, dynamically adjusting the cooling rate of each stage of crystallizing tank and the addition amount of a co-crystallizing solvent; and feeding back an outlet crystal mush concentration signal of the last-stage crystallizing tank to the solid-liquid separation unit, and adjusting the running rotating speed of the solid-liquid separation unit in a linkage manner. According to the cooling rate optimization control method and system for continuous cooling crystallization, prospective correction of the cooling rate is carried out by using the predicted supersaturation degree, and adjustment of the additive amount of the auxiliary crystallization solvent is carried out by using the predicted crystal particle size distribution; and finally, an outlet concentration signal of the last-stage crystallizing tank is fed back to the solid-liquid separation unit in real time to adjust the separation rotating speed in a linkage manner, so that the crystal particle size deviation is reduced, and the triazole crystallization recovery rate is improved.

The embodiment of the invention provides an evaporation system control method and an evaporation system, and relates to the technical field of control, the method is applied to a control system in an MVR evaporation system.The method comprises the steps that in response to a starting instruction, a feeding system is controlled to pump to-be-treated liquid into an evaporation crystallization system, and the real-time boiling point rise of the evaporation crystallization system is monitored; and determining to adopt an optimal recovery rate control mode or a boiling point rise control mode as a target control mode based on the real-time boiling point rise, and controlling the feeding system, the evaporative crystallization system and the water production system to treat the to-be-treated liquid according to a preset strategy corresponding to the target control mode, the frequency of the distilled water and the flow of the to-be-treated liquid pumped by the feeding system meet the corresponding recovery rate, so that the control intelligence and reliability of the MVR evaporation system are improved.

The invention relates to the technical field of fluorination equipment, in particular to high-purity fluorocarbonate-based solvent purification equipment, which comprises a purification main body internally provided with a purification cavity; the liquefaction separation module is arranged at the top of the purification cavity and is used for exchanging heat with the crude gas entering the purification cavity, so that the crude gas is liquefied and then subjected to gas-liquid separation; the rotary crystallization module comprises a crystallization pond, a rotary crystal plate group and a collection assembly, the crystallization pond is arranged below the purification cavity and used for receiving the liquefied and separated liquid phase, the rotary crystal plate group partially extends into the crystallization pond, and the rotary crystal plate group continuously rotates, so that liquid in the crystallization pond is crystallized on the surface of the rotary crystal plate group; and then the crystals are collected by the collecting assembly after rotating to the upper part of the crystallizing pond. According to the purification equipment for the high-purity fluorocarbonic ester-based solvent, the high-purity fluorocarbonic ester-based solvent can be continuously obtained in a manner of liquefying and then continuously crystallizing and collecting, so that the purification equipment has a good industrial value.

The invention belongs to the technical field of impurity separation, and particularly discloses a method for separating and purifying impurities in a process for preparing glyoxylic acid through oxalic acid electrolysis, a crystallization kettle is included, an isolation device is arranged in the crystallization kettle, and the isolation device comprises a conical top cover, a conveying pipe, an annular filter screen, a directional conveying assembly and a sealing assembly; the conical top cover is arranged at the axis of the crystallization kettle, an opening of the conical top cover faces downwards, and a plurality of fixing rods are fixedly connected between the top of the conical top cover and the inner wall of the side face of the crystallization kettle. According to the method, glyoxylic acid product solutions with different concentration specifications and the high-purity glyoxylic acid crystal can be obtained after the electrolyte is sequentially subjected to pre-evaporation, electrodialysis, secondary evaporation, cooling crystallization, solid-liquid separation, washing and drying and other procedures, so that the prepared high-purity glyoxylic acid crystal can be popularized and applied in the field of high-end medicine.

The invention provides an ultrasonic-assisted gamma-aminobutyric acid crystallization particle size regulation and control method, which comprises the following steps: removing impurities and decolorizing gamma-aminobutyric acid-containing feed liquid, heating, stirring and concentrating to a nearly saturated state, then carrying out ultrasonic-assisted crystallization, cooling, aging and suction filtration to obtain coarse crystals, and finally washing and drying to obtain target crystals. According to the method, a synergistic process of raw material liquid pretreatment, evaporation concentration-ultrasonic-cooling coupling crystallization, aging and post-treatment is adopted, an ultrasonic cavitation effect is utilized to reduce a nucleation barrier, and a supersaturation degree precise control and gradient cooling strategy is combined, so that grain size refinement, obvious narrowing of distribution and effective inhibition of agglomeration of crystals are realized; the median particle size of the crystal can be controlled to be smaller than or equal to 200 microns, the particle size distribution span is smaller than or equal to 1.5, the agglomeration phenomenon is remarkably inhibited, the crystal form is kept stable, the crystal habit is complete and smooth, the crystal product quality and the process efficiency are remarkably improved, and the method has important industrial application value.

The invention relates to equipment for preparing clobetasol propionate liniment and a preparation method of the clobetasol propionate liniment. The equipment comprises a material mixing mechanism, a barrel, a stirring shaft rotationally arranged on the barrel, stirring blades for stirring substances, a partition plate for separating the interior of the barrel, a crystallization rod for cooling materials and a drying mechanism for drying the substances. Wherein the stirring blades are fixedly arranged around the stirring shaft, and the stirring blades at the bottom are arranged around the stirring shaft in a swinging manner; the partition plate is movably arranged in the barrel around the stirring shaft; the crystallization rod is movably arranged at the bottom of the barrel; the drying mechanism communicates with the bottom of the barrel; the drying mechanism is communicated with the mixing mechanism; the partition plate is arranged between the fixed first ring frame and the rotary second ring frame; the partition plate is connected with the first ring frame and the second ring frame. The second ring frame rotates to drive the partition plate to open or separate the cylinder. The preparation method solves the problem that the preparation efficiency of clobetasol propionate is affected due to more preparation equipment caused by complex process steps in the clobetasol propionate liniment preparation process in the existing scheme.

The invention belongs to the technical field of energy storage batteries, and particularly relates to a desalting, dehumidifying and cooling integrated thermal management device and method for a marine environment energy storage battery. The device is composed of an energy storage battery module, an air inlet dehumidification and desalination module, an air return reprocessing module, a salt crystallization and separation module, a cold source heat exchanger and a heat source heat exchanger. Wherein the inlet air dehumidification and desalination module cools inlet air by utilizing a first solvent and inlet air cross flow heat exchange mode, meanwhile, the first solvent dissolves salt mist ions in inlet sea wind, and the purposes of reducing the dew point temperature and dehumidifying the inlet sea wind are further achieved; in order to ensure water-salt concentration balance of the first solution, a salt crystallization precipitation module and a return air retreatment module are adopted to jointly adjust the concentration of the first solution. A solution is provided for safe and reliable operation of the energy storage battery system under the ocean high-temperature, high-humidity and high-salt links.

The invention belongs to the technical field of chemical fertilizer production and livestock feed, and particularly relates to a combined preparation method of water-soluble potassium sulfate and feed-grade potash magnesium sulphate fertilizer. According to the method, the picromerite concentrate wet material is taken as an initial raw material, the picromerite concentrate wet material with relatively low potassium and magnesium content is purified into high-grade potassium sulfate and the potash magnesium sulphate fertilizer by utilizing hot melt mother liquor at different mother liquor points through multi-stage hot melt and multi-stage vacuum evaporative crystallization, so that efficient distribution and conversion of potassium and magnesium elements in the raw material are realized, resource waste is avoided, and the production cost is reduced. The comprehensive utilization rate of raw materials is greatly improved. Two high-added-value products, namely the water-soluble potassium sulfate and the feed-grade potassium-magnesium fertilizer, are prepared at the same time, and the blank of combined preparation of raw materials required by agriculture and animal husbandry is filled.

The invention belongs to the technical field of magnesium desulfurization wastewater treatment, and particularly relates to a magnesium desulfurization wastewater evaporation concentration material transfer anti-crystallization blockage system which comprises an evaporation separator and crystallizers, a circulation pipeline is arranged between an inlet and an outlet of a material transfer pump, and a material transfer pipeline is connected between a material transfer regulating valve and the crystallizers. The circulating pipeline and the branch pipelines are respectively communicated with the material transferring pipeline through branch pipelines, and the circulating pipeline and the branch pipelines are detachable metal hoses; a steam inner pipe is arranged in the material transferring pipeline, a heat preservation layer is arranged outside the material transferring pipeline, and opening degrees of the material transferring adjusting valve and the steam adjusting valve are in linkage control. Compared with the prior art, the device has the beneficial effects that effective anti-blocking prevention and emergency treatment are carried out on materials which are long in material transfer pipeline, rapid in concentration and temperature change and easy to crystallize in multi-point material transfer, cooperative control over the temperature of the separator feed liquid and the temperature of the material transfer pipe feed liquid is achieved, and concentration and temperature monitoring is carried out on the output feed liquid; materials always flow in the material transfer pipeline, and continuous production operation is guaranteed.

The invention relates to the technical field of separation and purification devices, in particular to a separation and purification device for 8-hydroxyquinoline crystallization. The device comprises a crystallization kettle used for cooling an 8-hydroxyquinoline solution, a stirring assembly is arranged in the crystallization kettle, the stirring assembly is provided with a plurality of cleaning assemblies in the radial direction of the crystallization kettle, each cleaning assembly comprises a scraping part and a pneumatic part, the scraping parts are slidably connected to the side, close to the inner wall of the crystallization kettle, of the stirring assembly, and the pneumatic parts are arranged on the scraping parts. The pneumatic part is used for pushing the scraping part to be close to the inner wall of the crystallization kettle; the increased air pressure in the pressure-bearing cavity pushes the pressure-bearing plate to slide towards one side close to the contraction groove, the telescopic arm is pushed out of the contraction groove through the sliding rod, and due to the fact that large air pressure is accumulated in the pressure-bearing cavity before the telescopic arm stretches out of the contraction groove, the conical part is inserted into the crystal above the liquid level at the moment that the top of the contraction groove is completely out of shielding of the installation groove. The telescopic arm instantly releases large force, and it can be ensured that the conical part is inserted into crystals tightly combined with the inner wall of the crystallization kettle.

The invention relates to the technical field of purification, in particular to Chinese cabbage moss allergy-free factor purification equipment which comprises an outer box, one side of the outer box is communicated with a feeding pipe, a self-cleaning filtering assembly capable of automatically scraping impurities attached to different side faces is arranged in the outer box, and the self-cleaning filtering assembly comprises a filtering cylinder rotationally connected with the side wall of the outer box; one side of the filter cartridge is communicated with a transverse pipe, the transverse pipe extends to the outside of the outer box, the feeding pipe penetrates through the transverse pipe, a scraping assembly is arranged in the filter cartridge, the scraping assembly is dragged to rise when the filter cartridge rotates and then slides down to conduct scraping, a driving assembly used for driving the transverse pipe and the filter cartridge to rotate is arranged on the outer box, and the scraping assembly comprises an arc-shaped plate in sliding connection with the inner wall of the filter cartridge; and a plurality of sliding plates are fixedly connected between the two arc-shaped plates. The technical problems that particles in Chinese cabbage moss juice of existing purification equipment are prone to blocking a filter screen, the amount of blocked Chinese cabbage moss particles is large, the cleaning difficulty is increased, and the process of cleaning the filter screen is time-consuming and labor-consuming are solved.

The utility model discloses a pyrolysis material balanced self-circulation conveying structure, which relates to the technical field of waste liquid treatment, and comprises a bottom plate, the top of the bottom plate is fixedly connected with two limiting plates, the interiors of the two limiting plates are fixedly connected with heating jackets, the top of the bottom plate is fixedly connected with a fixed plate positioned on one side of one limiting plate, and the top of the bottom plate is fixedly connected with the heating jackets. And a supporting plate is fixedly connected to the position, located on one side of one limiting plate, of the top of the bottom plate, second sealing supporting assemblies are installed on one side of the fixing plate and one side of the supporting plate correspondingly, and a rotary shell is installed on the outer sides of the two second sealing supporting assemblies. By arranging the rotary shell, the heating sleeve and the conveying shell, compared with the prior art, the structure has the advantages that the structure is simple, the occupied area is small, more equipment is not needed, and the treatment cost is reduced.

The utility model provides a brine evaporative crystallization device for industrial salt production, which comprises a box body, foot stools which are uniformly distributed are fixedly connected to the bottom wall of the box body, a ventilation bin is fixedly connected to the top wall of the box body, and the brine evaporative crystallization device further comprises a bearing assembly which is rotatably connected to the inner wall of the box body and is used for bearing brine to be evaporated, the bearing assembly comprises rotating frames rotationally connected to the inner wall of the box body and symmetrically distributed about the central axis of the box body, an evaporation disc rotationally connected to the inner wall of the box body through the rotating frames, and an adapter fixedly connected to the bottom wall of the evaporation disc; the supporting assembly is rotationally connected to the inner wall of the box body; the heating assembly is fixedly connected to the bottom wall of the evaporation disc; the ventilation assembly is arranged on the inner wall of the ventilation bin; the collecting assembly is arranged on the inner wall of the box body. The brine evaporation device can control the air velocity on the surface of brine in the brine evaporation process, accelerates the evaporation and crystallization rate, can automatically collect crystals evaporated from the brine, reduces the labor intensity of workers, and improves the collection efficiency of the crystals.

The invention provides a production device and process for increasing the content of magnesium citrate crystals. The problems that in the prior art, the impurity co-crystallization rate is high, and crystal forms are difficult to control are solved. The device comprises a gradient temperature control multi-stage crystallization device and a crystal form directional regulation and self-adaptive separation system. The gradient temperature control multi-stage crystallization device is composed of a main crystallizer, a gradient temperature control system, an ultrasonic-assisted system and a liquid phase partition circulating system, and the crystallization environment is accurately controlled through the temperature gradients of five independent temperature zones. The crystal form directional regulation and self-adaptive separation system is composed of a seed crystal dynamic inoculation device, an electric field auxiliary directional crystallization system, a real-time crystal morphology analysis system and a self-adaptive separation system, and the crystal morphology and particle size distribution can be accurately controlled. According to the process disclosed by the invention, the main content of magnesium citrate is increased to 98.8 + / -0.3%, heavy metal impurities and organic impurities are respectively reduced by 70% and 75%, the crystal form consistency is increased to 96 + / -2%, the production period is shortened by 33%, and the process has remarkable economic benefits and social benefits.

The utility model relates to the technical field of wastewater retreatment, and provides an ion exchange water production regeneration wastewater pretreatment device. The ion exchange water-making regenerated wastewater pretreatment device comprises a normal-temperature crystallization reactor, a sedimentation tank, a filtering assembly, an ion exchange assembly and a strong oxidizer. The normal-temperature crystallization reactor is used for crystallizing and separating part of impurities in the regenerated wastewater; the settling pond is communicated with the normal-temperature crystallization reactor and is used for settling and purifying the crystallized regenerated wastewater; the filtering assembly is communicated with the settling pond and is used for filtering the settled and purified regenerated wastewater; the ion exchange assembly is communicated with the filtering assembly and is used for removing calcium and magnesium ions in the regenerated wastewater; the strong oxidizer is communicated with the ion exchange assembly and is used for killing microorganisms in the regenerated wastewater. The device disclosed by the utility model can be used for treating and separating most impurity ions except sodium chloride and sodium sulfate in the ion exchange water-making regeneration wastewater.

The invention belongs to the technical field of coal chemical industry grey water treatment, and particularly relates to an advanced treatment method and system for coal chemical industry grey water circulating water. The method integrates pretreatment, complexing cracking, fractional crystallization and deep deamination, and is characterized in that a chelating structure of an organic phosphorus dispersing agent and calcium and magnesium ions is thoroughly destroyed through an advanced reduction-advanced oxidation combined process, target ions are released, and the core problems that hardness removal is hindered and phosphorus pollution is caused are solved; then, calcium and magnesium are respectively converted into calcium carbonate and magnesium ammonium phosphate particles for resource recovery by utilizing a secondary crystallization technology, so that the bottlenecks of high alkali liquor consumption and salt accumulation of a traditional high-pH magnesium ion precipitation method are broken through; and finally, the residual ammonia nitrogen is deeply removed by adopting a pollution-resistant PTFE hydrophobic membrane, so that the residual ammonia nitrogen is efficiently and stably removed, and the problem that a traditional polypropylene material membrane system is easy to pollute and block, easy to oxidize and difficult to apply to the field is solved.

The utility model discloses an efficient film evaporation device for magnesium glycinate production, and relates to the field of magnesium glycinate production equipment.The device comprises a cylindrical evaporation chamber, at least four heating jackets which are arranged on the outer surface of the evaporation chamber in the axial direction and independently control the temperature in a partition mode, an integrated heating rotor assembly and a controller; a feeding hole and a concentrated solution outlet are respectively formed in the upper end and the lower end of the evaporation chamber, and a lining layer is compounded on the inner wall of the evaporation chamber; each independent heating jacket is provided with a PID (Proportion Integration Differentiation) temperature control module connected with the controller, so that the plurality of independent heating jackets form stepped heating distribution along the material flowing direction; the rotor assembly includes a spiral vortex disk. According to the film evaporator, stepped temperature rise is formed in the material flowing direction through the multi-partition independent temperature control heating jacket and the PID module, the problem that the axial temperature field of traditional equipment is not uniform is effectively solved, a magnesium glycinate solution saturation solubility curve is accurately matched, and crystal form transformation caused by local overheating is avoided.

A high-salt steam purification device belongs to the technical field of sewage treatment, is used for mechanically separating, chemically washing and precisely filtering high-salt steam, and comprises a steam filtering device for separating and intercepting salt in the high-salt steam in a cyclone separation manner; the steam cleaning tower is connected with the steam filtering device and used for treating a gas phase after salt separation, and chemical washing of the gas phase is achieved; and the filter is connected with the steam cleaning tower and is used for separating and intercepting particulate matters in the chemically washed gas phase. Based on the purification device, the invention further provides a high-salt steam purification method. Through efficient purification, low-consumption circulation, intelligent control and anti-corrosion design, accurate removal of steam salt is achieved, the service life of key equipment core spare parts of the evaporative crystallization process in the sewage treatment industry is remarkably prolonged, the daily operation and maintenance cost of the equipment is reduced, and the economic benefit is increased. And a stable and reliable technical guarantee is provided for stable operation of core equipment in the sewage treatment industry.

The cooling crystallization production system comprises a crystallization unit, a product storage tank, a pipeline and a switching unit, the crystallization unit is composed of at least two parallel crystallizers, feeding ports of the crystallizers are connected with a discharging port of a distribution tank, and a discharging port of the distribution tank is connected with a discharging port of the product storage tank. Each crystallizer is a double-pipe heat exchanger, the shell pass of each crystallizer is a material flow path, and the tube pass of each crystallizer is a cold / hot medium flow path; the pipeline and switching unit is configured to selectively enable any crystallizer to be connected into a circulation loop, and in the circulation loop, materials circularly flow in the shell pass of the crystallizer through a circulation pump so as to achieve cooling crystallization. The crystallizer completing crystallization can be selectively switched to a discharging pipeline, and a heating medium is introduced into the tube pass of the crystallizer to melt crystals and then output the crystals into the product storage tank; compared with the prior art, a semi-continuous production mode is constructed, and the production cycle of unit products is shortened.

The invention relates to the technical field of mixing equipment, and discloses a mixing preparation device and method for a plant growth regulator containing a silicon element. The mixing preparation device of the silicon-containing plant growth regulator comprises a stirring main kettle, an online monitoring unit, a solid-liquid separation unit and a control unit, the stirring main kettle is used for carrying out a liquid-phase chemical reaction and separating out a solid product in situ, and is provided with a stirring piece; and the on-line monitoring unit is used for acquiring a reaction process signal and a crystallization state signal in the main stirring kettle in real time. The online monitoring unit, the solid-liquid separation unit and the control unit are arranged and cooperatively used, dynamic optimization management of the reaction crystallization process is achieved, the solid-liquid separation unit moves out crystals in time and circularly supplements materials, the problem that the crystals are secondarily wrapped is solved, meanwhile, reaction balance is pushed to move rightwards, and the reaction efficiency is improved. The conversion rate and the yield are improved.

The invention discloses a crystallization device for sodium sarcosinate production, relates to the technical field of crystallization devices, and aims to solve the problems that when supersaturated liquid drops make contact with the wall surface of a low-temperature gas-liquid separator, water evaporation is intensified, the solubility of solute is further reduced due to temperature reduction, crystal precipitation is accelerated under the dual action, the supersaturated liquid drops are prone to being attached to the wall of a tank in the crystallization process, and the crystallization effect is poor. In order to solve the problems that the heat exchange efficiency is influenced by scaling of a tank wall, wall-adhered crystals cannot be recycled and the yield is reduced in the prior art, an evaporator is mounted on one side of a gas-liquid separator, a cyclone separator is mounted on the other side of the gas-liquid separator, an ultrasonic disperser is mounted on one side of the cyclone separator, a membrane filter is mounted on one side of the ultrasonic disperser, and a water outlet is formed in the other side of the membrane filter. A gas-liquid separator cleaning mechanism is mounted in the gas-liquid separator, a gas-liquid separator scraping frame is mounted at one end of the gas-liquid separator cleaning mechanism, and a membrane filter cleaning mechanism is mounted in the membrane filter.

According to the low-energy-consumption evaporating crystallizer, a single driving motor is adopted, a rotating shaft rod is used for simultaneously driving a scale scraping assembly arranged in an evaporating cylinder to conduct dynamic scale scraping and solution stirring, one end of the rotating shaft rod passes through a first transmission mechanism and a linkage shaft, and the other end of the rotating shaft rod is driven by a second transmission mechanism. A spiral separation assembly in the gas-liquid separation tank is driven by the direction conversion mechanism to rotate at a high speed so as to strengthen gas-liquid separation; and the other end of the discharging pipe drives a discharging assembly in the discharging pipe to rotate through a second transmission mechanism, so that discharging blockage prevention and negative-pressure deslagging are realized. Through a single power source, cooperative linkage of five functions of scale scraping, stirring, separation, blocking prevention and slag discharging is achieved, the structure is compact, the problems that traditional equipment is serious in scaling, poor in gas-liquid separation effect and prone to blockage during discharging are effectively solved, and meanwhile energy consumption of the equipment is remarkably reduced.

The utility model discloses ammonia nitrogen removal equipment for anaerobic fermentation biogas slurry, and belongs to the field of ammonia nitrogen removal and recycling of anaerobic fermentation biogas slurry. All deaminated biogas slurry flows back to the anaerobic fermentation system by virtue of a steam stripping flash evaporation deamination technology, an ammonia absorption technology, an evaporative crystallization technology, a mud-mud heat exchange technology and the like. An adopted flash evaporation deamination tower (3) is internally divided into a plurality of areas, ammonia-containing biogas slurry sequentially flows through the areas and is in countercurrent contact with circulating steam and fresh steam in the areas, ammonia nitrogen in the biogas slurry is removed through steam stripping and flash evaporation, and the generated deaminated biogas slurry completely flows back to an anaerobic fermentation system; ammonia in the ammonia-containing steam is absorbed by dilute sulfuric acid in an ammonia gas absorption tower (9), an ammonium sulfate solution is generated and sent to an evaporative crystallization tank (16), indirect heating and circulating evaporative crystallization are adopted, and solid ammonium sulfate is transported outwards; the mud-mud heat exchanger (2) is suitable for heat exchange between non-Newtonian fluid materials. Biogas slurry is no longer discharged, and fixed asset investment of anaerobic fermentation projects with the same gas production scale is reduced.

The present application relates to the technical field of high-salinity wastewater, and particularly relates to a device and a method for separating metal ions in high-salinity wastewater by micro-interface induced crystallization. The present application provides a device for separating metal ions in high-salinity wastewater by micro-interface induced crystallization, which comprises a cylinder, and a fluid mixing zone, a circulating granulation zone and a particle separation zone are sequentially arranged in the cylinder from bottom to top. The device for separating metal ions in high-salinity wastewater by micro-interface induced crystallization provided by the present application helps high-salinity wastewater to enter the upper space of the gas-liquid distributor at different speeds with the help of the differential-speed gas-liquid distributor; meanwhile, more crystalline particles are sent to the circulating granulation zone, the flow direction of the seed crystal in the circulating granulation is regulated, and the crystallization efficiency of the seed crystal is improved. The fluidization zone is designed to be wide at the bottom and narrow at the top, the cross-sectional area of the flow channel of the upper fluidization zone is increased, more sufficient reaction space is provided for the crystalline particles, the drag force of the fluid on the seed crystal particles is weakened, and the residence time of the crystalline particles in the upper fluidization zone is prolonged.

The invention provides a continuous crystallization method for recovering BHET monomers from waste polyester fabric alcoholysis liquid, which comprises the following steps: mixing the waste polyester fabric alcoholysis liquid with water under the action of stirring, filtering at 65-75 DEG C to form mixed liquid, and inputting the mixed liquid into a crystallization kettle for 2-4 stages of continuous crystallization. The mixed solution continuous cooling crystallization method is developed based on the complexity of the components of the waste polyester textile fabric, the problems that the conventional intermittent production process is long in time consumption and low in efficiency are solved, and the obtained BHET product is large in particle size, narrow in particle size distribution and easy to filter and dry subsequently. In addition, the invention also has the advantages of high purity, good fluidity and high stability.

The invention relates to the field of potassium chloride purification, and provides an analytically pure potassium chloride purification method, which comprises: S1, dissolving industrial grade potassium chloride, adding a refining agent to remove impurities, and filtering to obtain a supersaturated potassium chloride solution; s2, performing variable-speed cooling crystallization treatment on the supersaturated potassium chloride solution to obtain a potassium chloride crystal mixture; s3, performing crystal layer pretreatment on the potassium chloride crystal mixture to obtain a potassium chloride crystal layer; s4, carrying out gradient spraying washing treatment on the potassium chloride crystal layer to obtain a potassium chloride crystal wet material; s5, drying the potassium chloride crystal wet material to obtain analytically pure potassium chloride; the method is simple in process equipment and mild in operation condition, and analytically pure potassium chloride can be stably prepared under the condition of conventional equipment.

The invention relates to a freeze concentration production method and device, and belongs to the technical field of freeze concentration. The method comprises the following steps: feeding a raw material (dilute solution) into a freezing and dissolving device A, setting a freezing temperature, freezing to achieve solid-liquid balance, and separating to obtain a high-concentration solution A; and heating and dissolving the separated ice body in the device to obtain solutions (A1, A2, ice with solute content of less than 1%) with different concentrations. The low-concentration solution (A2) is frozen and concentrated again according to the method, so that the concentration of the solution is improved. The high-concentration solution (A1) can be frozen and concentrated again by using the process method to improve the concentration of the solution, or solutions with different target concentrations can be obtained by mixing according to needs.