39results about How to "Not easy to scale" patented technology

The invention relates to the technical field of extraction and utilization of electrolytic aluminum lithium-containing waste, in particular to a method for extracting lithium from electrolytic aluminum waste through ultrasonic strengthening. The method comprises the following steps: (1) coarsely crushing the electrolytic aluminum waste; (2) after the carbon is removed, the electrolytic aluminum waste is subjected to ultrasonic strengthening to strengthen the leaching of lithium, and the lithium is selectively leached by controlling the leaching acidity; (3) performing two-stage impurity removal on the lithium leaching solution; and (4) concentrating and denitrifying the impurity-removed liquid, precipitating lithium, carbonizing and crystallizing to prepare the battery-grade lithium carbonate. According to the method, carbon in the electrolytic aluminum waste is removed through a calcination or combustion method, leaching of lithium is strengthened through an ultrasonic strengthening method, meanwhile, the leaching condition is controlled to enable lithium in the waste aluminum slag to be dissolved out into a leaching solution, and aluminum, iron, sodium and most fluorine in the waste aluminum slag are not dissolved out and left in the leaching slag. And performing simple impurity removal, concentration and denitration on the leachate to prepare the battery-grade lithium carbonate. The method is simple in process and high in lithium extraction rate, and cryolite is mainly contained in leaching residues and can be utilized subsequently.

The invention relates to the technical field of calcium formate production, in particular to a calcium formate efficient evaporative crystallization method which comprises the following steps: S1, mixing reaction; s2, removing impurities; s3, evaporative crystallization; s4, centrifugal drying; and S5, cooling and packaging. The method has the advantages that the whole process is simple, the production cost and the labor intensity are reduced, large-scale continuous production is easy to realize, the content of the produced calcium formate product is 99% or above, the purity is high, and the color is pure white; the triple-effect evaporation technology is adopted, energy consumption is reduced, the effects of energy conservation and emission reduction are achieved, meanwhile, crystals which are evenly distributed and large in particle size can be obtained through the last-effect DTB crystallizer, follow-up filtering and drying are facilitated, and energy consumption in the follow-up process can be greatly reduced; in the packaging process, the crystals are introduced into a cooler to be cooled and then conveyed to a cooling cyclone separator, the temperature of the crystals is reduced to 40 DEG C, it is guaranteed that particles are uniform and cannot be hardened, the quality is optimized, and the operation safety degree is also improved.

The present invention relates to a calcium carbide liquid circulation cooling device which is not easy to scale, and belongs to the technical field of circulation cooling. The device comprises a calcium carbide liquid buffer tank, a cooling box, and a cooling fan device from bottom to top. The calcium carbide liquid buffer tank is connected to the cooling box through a water outlet pipe, and the cooling fan device is connected to the cooling box through a top platform of the cooling box. The interior of the cooling box comprises a water inlet pipe, a water distribution pipe, a cooling nozzle above the water distribution pipe, and a top platform on the top of the cooling box. The cooling nozzle comprises a straight pipe section, a flow stabilizer, and a baffle from bottom to top. A sealless self-priming water pump is arranged on the water outlet pipe, comprising a motor, a pump body, an outlet check valve, and an outlet diaphragm valve. The flow rate of the calcium carbide liquid at the water distribution pipe and the cooling nozzle is 1.4 to 1.6 m / s. The wind speed of the fan blade is 4 to 6 m / s. The descaling cycle is extended from one month to more than two years.

The utility model relates to a cooling tower and a refrigerating system.The cooling tower comprises a tower body (1), the tower body (1) comprises a first opening (11) and a second opening (12), the first opening (11) is formed in the bottom area of the tower body (1) and used for air inlet, and the second opening (12) is formed in the top area of the tower body (1) and used for air outlet; the spraying device (2) is arranged in the tower body (1), is positioned in the upper area of the tower body (1) and is configured to spray a cooling medium introduced from the liquid inlet pipe; the falling film assembly (3) is arranged in the tower body (1) and located below the spraying device (2), the falling film assembly (3) comprises a rotating shaft (31) and a falling film part (32), the rotating shaft (31) extends in the first direction (x) and is rotatably connected to the side wall of the tower body (1), the falling film part (32) is fixedly connected to the rotating shaft (31), and the falling film assembly (3) is configured to convert the falling cooling medium into a liquid film and scatter the liquid film.

The invention discloses a two-stage gas producer and a coal gasification method, the gas producer comprises: a gas producer provided with a feed inlet, an upper-stage gas outlet, a lower-stage gas outlet, a second gasifying agent inlet, and a first gasifying agent inlet; the fire grate is arranged in the gas producer and is positioned below the second gasifying agent inlet; and a phenol water vapor outlet of the phenol water vapor stripping tower, which is communicated with the first gasifying agent inlet and the second gasifying agent inlet, is formed in the phenol water vapor stripping tower. The heat of the lower section coal gas is respectively used for heating phenol water in the reboiler and superheated steam in the superheater, the sensible heat of the lower section coal gas is recovered, the temperature of the lower section coal gas is reduced, the heat efficiency is high, meanwhile, the phenol water obtained after purification treatment of the upper section coal gas is recycled, and the resource utilization rate is improved.

The invention discloses a drillable sand control screen pipe and a deep gravel packing sand control method adopting the screen pipe. Wherein the drillable sand control screen pipe is a glass fiber reinforced plastic composite material pipe with vertical screen seams, which is prepared by taking epoxy resin as a matrix, taking glass fiber as a reinforcing material and adding an improver at the same time. The drillable sand control screen pipe has the advantages that the drillable sand control screen pipe has the characteristics of being light in self weight, not prone to scaling, capable of being completely drilled and broken and the like, the problem that fishing is difficult after sand control of a long well section machine is effectively solved, the overall operation efficiency is improved, and after the drillable sand control screen pipe is adopted, the single well fishing time is shortened to 5-8 days from 28 days.

The invention discloses an efficient anaerobic method for reinforcing granular sludge by combining ceramic membrane pretreatment with a magnetic method, and relates to the technical field of water treatment equipment. The efficient anaerobic method for reinforcing the granular sludge by combining the ceramic membrane pretreatment with the magnetic method comprises the following steps: S1, pretreating a kitchen three-phase separation liquid by using a ceramic membrane, and removing relatively large particles and suspended matters in water; s2, enabling the pretreated kitchen three-phase separation liquid to flow through a magnet device through a pipeline, magnetizing the wastewater, and reducing precipitation of calcium carbonate crystals in the pipeline and the inner wall of equipment; gas generated in the reaction is collected, so that recycling of wastewater is realized; a ceramic membrane and a magnet device are arranged in the whole method, so that larger particles and suspended matters of the kitchen three-phase separation liquid entering the UASB anaerobic reactor can be effectively reduced, and the treatment efficiency of the UASB anaerobic reactor is enhanced; meanwhile, the magnet is combined to magnetize the wastewater, so that the deposition of calcium carbonate crystals on the pipeline and the inner wall of equipment is reduced.

An electromagnetic water meter sensor lining comprises a flange, a metal flow guide pipe, a side plate, a plastic pipe, a plastic ring and metal and plastic bonding glue, and the flange, the metal flow guide pipe and the side plate are welded to form a flow guide body assembly; the metal flow guide pipe is made of SUS304 material, and four electrode holes are uniformly distributed in the middle of the metal flow guide pipe; the plastic pipe is a standard part and is slightly longer than the electromagnetic water meter welding flow guide body assembly; the plastic pipe is in interference fit with the metal flow guide pipe; the plastic pipe and the plastic ring are hot-melted together; the plastic pipe is pressed into the metal flow guide pipe and is in tight interference fit with the metal flow guide pipe; the plastic ring and the flange face can be tightly bonded together through the metal and plastic bonding glue. And the plastic plate and the flange surface are pressed and attached together. The lining is made of a standard plastic pipe, and the flange face flange is made of a plastic plate through a hot melting process. The plastic lining is good in insulativity, strong in corrosion resistance, smooth in surface, not prone to scaling, good in fluid measurement stability and high in tensile strength, the product performance is greatly improved, and the service life of the product is greatly prolonged.

The utility model provides an electromagnetic water meter sensor structure which comprises a flange, a side plate, a flow guide pipe, a macromolecule plastic measuring pipe, a macromolecule plastic plate, an electrode, a pole shoe, a magnet exciting coil, a cover plate, a connecting block, a silicon steel sheet, a shielding silicon steel sheet, a gasket, a nut and a sealing component. A measuring tube liner of the sensor is made of a standard polymer plastic tube, and a flange flanging is made of a hot-melt polymer plastic plate. Compared with a traditional electromagnetic water meter sensor measuring pipe, the polymer plastic pipe is good in electrical insulation performance, resistant to corrosion, not prone to abrasion and good in adaptability to media and temperature, and meanwhile the requirements for hygiene permission and the like are met. And the hot melting process is mature, simple to operate, attractive in molding, low in manufacturing cost, long in service life, energy-saving and environment-friendly.

The application relates to the technical field of polyolefins, and discloses a coordination precipitation polymerization method for olefin polymerization and a polyolefin, the method comprising mixing olefin monomers, a catalyst and an additive, and performing a polymerization reaction; the olefin monomers contain nonpolar monomers and polar monomers, the nonpolar monomers are selected from one or more than two of ethylene, alpha-olefins and internal olefins, and the polar monomers are selected from one or more than two of enol, unsaturated carboxylic acids and unsaturated carboxylic acid esters; and the catalyst is selected from a post-transition metal complex shown in formula (I). The application can eliminate the catalyst loading process, realize olefin homogeneous catalyst polymerization self-forming, and prepare polyolefins with good particle morphology.

The utility model relates to the technical field of oil exploitation discloses a kind of wax-preventing structure and wax-preventing and hanging-off device, wax-preventing structure includes temperature insulation pipe, wax-preventing and cleaning pipe, in working condition, the upper end of temperature insulation pipe is installed in oil well mouth, lower end is inserted into oil well;Wax-preventing and cleaning pipe is detachably connected in the inside of temperature insulation pipe, in working condition, wax-preventing and cleaning pipe is located in the outside of lower hanging-off device.Wax-preventing and hanging-off device includes the wax-preventing structure.The beneficial effect of the utility model is, set temperature insulation pipe solves the root cause of wax deposition, again through wax-preventing and cleaning pipe structure maintenance, jointly prevent wax deposition from adhering to the surface of downhole hanging-off device, ensure the clearance of the movable part of hanging-off device, hanging-off device can be smoothly released at predetermined position, avoid causing downhole sticking accident.

The utility model discloses an electric water heater, including phase change gall and water gall, be provided with heating rod in water gall, and heating rod is used for heating the water in water gall, the phase change gall has the phase change material for heat storage and heat release, and the phase change gall still includes the heat exchange pipe who communicates with water gall, and the water that flows through heat exchange pipe can absorb heat from phase change material, can also release heat to phase change material, in the height direction of phase change gall, along the flow direction of water, at least partial heat exchange pipe is arranged from top to bottom, and the electric water heater still includes the circulation pipe who communicates water gall and heat exchange pipe, when heating rod works, and the hot water in water gall can circulate and flow between heat exchange pipe and water gall through circulation pipe. The electric water heater provided in the application embodiment can simplify the structure and manufacturing process of electric water heater, reduce manufacturing cost and use cost, realize efficient energy storage simultaneously, in addition, can also maintain the better heat exchange effect in the long term in the use process.

This invention relates to the field of polyolefin technology, and discloses a coordination precipitation polymerization method for olefin polymerization and a polyolefin thereof. The method includes mixing olefin monomers, a catalyst, and an auxiliary agent to carry out a polymerization reaction; the olefin monomers contain nonpolar monomers and polar monomers; the nonpolar monomers are selected from one or more of ethylene, α-olefins, and internal olefins; the polar monomers are selected from one or more of enols, unsaturated carboxylic acids, and unsaturated carboxylic acid esters; the catalyst is selected from a post-transition metal complex of formula (I). This invention eliminates the need for catalyst loading in the process, achieves self-forming polymerization of olefins using homogeneous catalysts, and prepares polyolefins with good particulate morphology.

The invention discloses an efficient heating boiler and a using method, and relates to the technical field of boiler equipment. Comprising an electrothermal furnace body; the cleaning assembly is used for cleaning the inner wall of the electrothermal furnace body; the cleaning assembly comprises an upper rotating disc rotationally arranged on the inner top wall of the electric heating furnace body and a lower rotating disc rotationally arranged on the inner bottom wall of the electric heating furnace body, a reciprocating lead screw is rotationally installed between the upper rotating disc and the lower rotating disc, and the reciprocating lead screw is in threaded connection with a cleaning ring; the electrothermal furnace body is provided with a driving assembly used for driving the cleaning ring to clean the inner wall of the electrothermal furnace body. The driving assembly comprises a driving motor fixedly installed on the top of the electric heating furnace body, and the driving end of the driving motor extends into the electric heating furnace body and is fixedly connected with a driving gear. The problems that the inner wall of the boiler is scaled after being used for a certain period, the heating effect is poor, the heat transfer efficiency is affected, and the heating efficiency of the boiler is reduced are solved.

This utility model discloses an anti-scaling preheater for a high COD wastewater MVR system, comprising: a U-shaped outer sleeve assembly, an H-shaped intermediate sleeve, and an inner sleeve. The H-shaped intermediate sleeve is concentrically fitted inside the U-shaped outer sleeve assembly, and the inner sleeve is concentrically fitted inside the H-shaped intermediate sleeve. The ends of the H-shaped intermediate sleeve inside the U-shaped outer sleeve assembly are all closed structures. An expansion joint is provided at one end of the U-shaped sleeve assembly, and an ultrasonic descaling device is provided on one side of the upper end of the U-shaped outer sleeve assembly. This utility model has the following advantages: the preheater is modularly designed, allowing multiple sets to be used in series, which is convenient for transportation. The annular material channel formed between the three sleeves makes the material a thin liquid layer, resulting in a high heat transfer coefficient. The hot and cold fluids flow completely in opposite directions, and ultrasonic descaling is achieved. Furthermore, the expansion joint on the U-shaped outer sleeve assembly, which facilitates heat exchange of the material, can effectively prevent damage to the outer sleeve due to thermal expansion and contraction.

The invention discloses a near-zero emission treatment process for wastewater in a chemical park. The process firstly mixes organic wastewater and inorganic wastewater of secondary biochemical effluent of the chemical park in a volume ratio (1:1), then uses Ca(OH)2 to soften the wastewater, and after the softened effluent is removed by an ultrafiltration system with part of suspended solids and macromolecular colloids, first enters a first-stage reverse osmosis system for desalination, controls the recovery rate at 70%, produces water for reuse, and obtains first-stage reverse osmosis concentrated water and then enters the reverse osmosis system for treatment. After the first-stage and second-stage reverse osmosis treatment, the total water recovery rate can reach about 90%, produces water for reuse, and the generated first-stage and second-stage reverse osmosis concentrated water enters a catalytic ozone oxidation unit to mineralize part of organic matter, and the effluent enters a biological activated carbon unit, and utilizes the synergistic effect of activated carbon adsorption and microbial oxidation and decomposition of organic matter to further remove the organic matter content in the first-stage and second-stage reverse osmosis concentrated water, so that the concentrated water meets the discharge standards.

The utility model discloses a two-in-one graphite synthesis furnace scaling inhibiting cooling device, and particularly relates to the technical field of cooling, the two-in-one graphite synthesis furnace scaling inhibiting cooling device comprises a two-in-one graphite synthesis furnace, a spiral cooling pipe is buried in the cylindrical side wall of the two-in-one graphite synthesis furnace, and the bottom of the spiral cooling pipe extends out of the side wall of the two-in-one graphite synthesis furnace to be communicated with a heat exchanger; the heat exchanger is provided with a plurality of vertical through grooves, the heat exchanger is slidably provided with a scraper attached to the outer surface of the heat exchanger, the bottom of the scraper is in threaded connection with a screw, the heat exchanger and the scraper are jointly sleeved with a heat exchange box, a driving motor is fixedly installed on the outer wall of the heat exchange box, and the output end of the driving motor is coaxially and fixedly connected with the screw. The top of the spiral cooling pipe communicates with a pure water tank, a branch water pipe at the bottom of the pure water tank communicates with the water return pipe, a piston is slidably installed in an inner cavity of the pure water tank, a through hole is formed in the top of the pure water tank, and the heat exchange efficiency can be kept stable for a long time.

The invention discloses an ozone catalytic membrane and aeration biological membrane synergistic reaction device which comprises an ozone preparation unit, the ozone preparation unit comprises an oxygen generator and an ozone generator connected with the oxygen generator, and the ozone preparation unit comprises an ozone catalytic membrane reactor and an aeration biological membrane reactor. The reaction process is as follows: a target water body and ozone enter the ozone catalytic membrane reactor, and then enter the aeration bio-membrane reactor for reaction after reaction. According to the invention, bubble-free aeration is carried out by using the ozone catalytic membrane contactor, so that the operation cost required for preparing an ozone source can be utilized to the maximum extent.

The invention discloses an industrial pipeline inner wall scale preventer, and relates to the technical field of pipeline scale prevention, the industrial pipeline inner wall scale preventer comprises a round pipe, a treatment mechanism and a pretreatment module, the treatment mechanism comprises a disc, a guide cone is fixedly mounted at the center of the outer side of the disc, and a bent flow channel is fixedly mounted on the side, away from the guide cone, of the disc; the bent flow channel is installed at the edge side of the outer side of the disc, a flow guide hopper is installed at the position, close to a liquid inlet hole of the bent flow channel, of the outer side of the disc, the pretreatment module comprises a first positioning sleeve, a conical device is fixedly installed at a liquid outlet of the first positioning sleeve through a connecting rod, and magnetic blades are fixedly installed at the conical surface of the outer side of the conical device; a supporting frame is fixedly installed between the conical surface of the inner side of the conical device and the bottom of the inner wall of the round pipe, and an auxiliary assembly is installed on the edge of the outer side of the conical device. The anti-scaling device for the inner wall of the industrial pipeline achieves the anti-scaling effect, pretreatment can be conducted, scaling of the inner wall of the pipeline is effectively prevented, the blocking condition is not prone to occurring, and safety and reliability are achieved.

The invention relates to a solvent-free environment-friendly continuous production method of 2, 4-D ammonium salt, which comprises the following steps: introducing 2, 4-D acid, ammonia gas and a catalyst into a first-stage tubular reactor for reaction, grinding by a pipeline mill, introducing into a second-stage tubular reactor, adding ammonia gas for reaction at the same time, and grinding through a pipeline mill, feeding into a three-stage tubular reactor, supplementing ammonia gas for reaction, and finally collecting materials at an outlet to obtain the 2, 4-D ammonium salt. According to the method, 2, 4-D acid can be continuously ammoniated to produce the 2, 4-D ammonium salt, no organic solvent needs to be added in the production process, scaling is not prone to occurring, and the method is easy to operate and suitable for automatic and even intelligent large-scale production.

The present invention relates to the technical field of heat pump systems, and discloses a full-liquid air source heat pump system, including a first compressor, a second oil return solenoid valve, a high and low pressure gauge, a gas-liquid separator and a second compressor, wherein the first compressor is connected to the second compressor through an oil balance pipe; the first compressor is connected to an oil separator through a pipeline, and the oil separator is connected to a pipeline connected between the first compressor and the second compressor through a pipeline; the first compressor and the oil separator are connected through a pipeline, and an intake temperature sensor, a low pressure sensor and a first oil return solenoid valve are fixedly installed on the pipeline between the first compressor and the oil separator. The present invention eliminates dead water areas and has low flow resistance; the use of high-efficiency heat exchange pipes can increase the large heat transfer area, reduce the heat transfer temperature difference, and the heat exchange efficiency is higher than that of traditional air source heat pump equipment; the water side has good fluidity, is not easy to scale, and is easy to clean and descale; and is convenient for maintenance.

This utility model discloses a dual-purpose (dry and wet) heat exchange tube, belonging to the field of heat exchange technology. It includes a flat heat exchange tube with straight-through S-shaped fins connected to it. A partition plate is fixed inside the flat heat exchange tube, and a baffle plate is installed inside the tube. A connecting assembly is installed at the end of the tube, and a support and protective structure is snapped onto it. Using a flat heat exchange tube in conjunction with straight-through S-shaped fins achieves both dry and wet application, reducing equipment size. The straight-through S-shaped fins have low resistance, are easy to clean with cold water, have no dead corners, and are not prone to scaling. Even if scaling occurs, it can be thoroughly removed by using a descaling agent and high-pressure water rinsing without damaging the fins. The partition plate and baffle plate inside the flat heat exchange tube can change the flow state, increase turbulence, and thus improve heat exchange efficiency. The support and protective structure provides support for the flat heat exchange tube.

The water heater comprises a water tank, a support and the heat pipe type solar heat collector, the water tank comprises a shell and an inner container, the space between the shell and the inner container is filled with a heat preservation layer, a plurality of heat conduction blocks are evenly distributed on the outer side of the bottom of the inner container along a straight line, and the section of each heat conduction block is in a T shape. A heat conduction surface at the top of the heat conduction block is an arc-shaped surface, a heat pipe insertion hole with a closed top is formed in the center of the heat conduction block, heat conduction pieces are arranged on the periphery of the heat pipe insertion hole, the heat pipe insertion hole is connected with the heat conduction surface through the heat conduction pieces, and external threads are arranged on the periphery of the opening end of the heat pipe insertion hole. And the heat pipe is sleeved with an internal thread fastener which slides and displaces along the heat pipe. When the water heater is used, due to the fact that the heat conduction area is large and heat is dispersed, scaling cannot be formed on the inner wall of the inner container, and it is guaranteed that the heat conduction block keeps high heat conduction efficiency all the time when the water heater operates for a long time.

The present invention provides a three-dimensional variable space condensing gas water heater whose heat exchange core is shaped like a woven daily necessity "bamboo basket". The heat exchange core is mainly composed of a water heater shell, a "basket"-shaped three-dimensional variable space heat exchange core, a guide tube, a partition layer and a burner, wherein the heat exchange core is composed of a single-layer or multi-layer "basket"-shaped coil, and is connected by a water inlet header and a water outlet header. The "basket"-shaped coil is made of a three-dimensional variable space tube, and the high-temperature flue gas generated by the burner enters the "basket"-shaped three-dimensional variable space heat exchange core and performs efficient heat exchange with the medium in the tube. The use of this three-dimensional variable space variable cross-section "basket"-shaped heat exchange core can effectively improve the heat exchange coefficient of the gas water heater heat exchanger, thereby improving the heat exchange efficiency of the water heater, which is beneficial to reducing the total volume of the water heater, reducing weight, saving materials, and reducing costs. In addition, it is easy to clean dust and scale, and extend the maintenance cycle.

The invention discloses a preparation method of anionic high-solid-content styrene-butadiene latex. The raw materials of the anionic high-solid-content styrene-butadiene latex are as follows, including 100-200 parts by mass of butadiene monomer, 40-80 parts by mass of styrene monomer, 4-8 parts by mass of anionic emulsifier, 1-3 parts by mass of molecular weight regulator, 10-17 parts by mass of defoamer, 2-3 parts by mass of anionic agglomerating agent, 5-13 parts by mass of anti-skinning agent, 200-800 parts by mass of deionized water, 2-4 parts by mass of dispersant NNO, 1-2 parts by mass of pH regulator, and 1-5 parts by mass of phosphoric acid. Due to the special electronegativity of anionic emulsifier, anionic emulsifier is used as both emulsifier and initiator, and in the polymerization process of styrene-butadiene rubber emulsion, the polymerization reaction is promoted, and then adsorbed on the surface of latex particles, and the stability of styrene-butadiene latex is increased. While rationally controlling various parameters of the preparation process, defoamer and anti-skinning agent are added to solve the problems between high-temperature and efficient dehydration and latex skinning, glue hanging, and foaming.

The invention relates to the technical field of vinyl acetate-ethylene copolymer emulsion, and discloses vinyl acetate-ethylene copolymer emulsion and a preparation method thereof, and a polymer cement waterproof coating, the copolymer emulsion comprises the following raw material components by mass: 30-45 parts of vinyl acetate; 14 to 18 parts of ethylene; 0.3 to 0.7 part of an emulsifier; 1-3 parts of a protective colloid; 0.5 to 2.5 parts of a functional high-molecular polymer; the use amount of water is 40-45 parts by weight; wherein the protective colloid is polyvinyl alcohol and / or hydroxyethyl cellulose, and the functional high-molecular polymer is polyacrylamide. The polymer cement waterproof coating has relatively high low shear viscosity, so that the sagging resistance of the JS waterproof coating is improved.

The invention provides a continuous crystallization method of aluminum fluoride, in the continuous crystallization method, a multistage continuous crystallization kettle is adopted, the yield of an obtained crystal product is improved, the particle size is increased, the filtering performance is improved, the fluidity of the obtained product is ensured, and the continuous crystallization method is suitable for industrial production. Therefore, the content of impurities entrained by products is reduced. According to the invention, an existing aluminum fluoride batch-type reaction crystallization technology and a continuous crystallization equipment technology are creatively combined and transformed into an aluminum fluoride continuous reaction crystallization process technology, so that the aluminum fluoride crystallization efficiency and the production capacity are improved, the product performance is improved, and the energy consumption is reduced.

The utility model relates to the technical field of water treatment, in particular to an electric flocculation reaction unit and an electric flocculation reaction device, the electric flocculation reaction unit comprises a cathode sleeve and an anode inner core, the lower end of the cathode sleeve is provided with a liquid inlet, and the upper end of the cathode sleeve is provided with a liquid outlet; the anode inner core is arranged in the cathode sleeve, a channel communicated with the liquid inlet and the liquid outlet is formed between the anode inner core and the cathode sleeve, and the anode inner core comprises a body and a plurality of fins distributed along the circumferential direction of the body. The application scene is more flexible, the anode inner core adopts a fin structure form, the surface is large, and larger current can be loaded in unit time, so that the anode inner core releases more anode metal ions in water in unit time, the anode metal ions are used as a coagulant, and the coagulation or flocculation efficiency is higher.

The application provides an underwater hydraulic hoist, which comprises a hydraulic cylinder, a piston rod and a power assembly, the piston rod extends out of the hydraulic cylinder to form an outer acting part, further comprises a flexible protection assembly and a filter assembly, the flexible protection assembly, the hydraulic cylinder and the outer acting part are sealingly connected to form a flexible bin, and the flexible bin is in communication with the filter assembly. The filter assembly comprises a filter, the filtering-out end of the filter is sealingly connected with the flexible bin, and a check valve is arranged at the filtering-in end. A breathing pipe is arranged in a cable assembly. The underwater hydraulic hoist provided by the application can ensure that the outer acting part of the piston rod is separated from the external dirty water body through the flexible protection assembly and the filter assembly, and prevent the piston rod from being damaged or leaking due to scaling and the like. The application has the advantages of simple structure, reliable operation, convenient installation and the like.

This invention relates to the field of polyolefin technology, and discloses a coordination precipitation polymerization method for olefin polymerization and a polyolefin thereof. The method includes mixing an olefin monomer, a catalyst, and an auxiliaries to carry out a polymerization reaction; the olefin monomer contains a nonpolar monomer and a polar monomer; the nonpolar monomer is selected from one or more of ethylene, α-olefins, or internal olefins; the polar monomer is selected from one or more of enols, unsaturated carboxylic acids, and unsaturated carboxylic acid esters; the catalyst is selected from a non-ceramic pre-transition metal complex of formula (I), wherein M is selected from a Group IVB metal; R 11 -R 15 Each component is independently selected from hydrogen, halogen, hydroxyl, substituted or unsubstituted C1-C20 hydrocarbon groups; X is selected from halogen or C1-C10 hydrocarbon groups, and n is 1 or 2. This invention eliminates the need for catalyst loading in the process, enabling self-forming of homogeneous catalyst polymerization of olefins and preparing polyolefins with good particulate morphology.