185 results about "Forced circulation" patented technology

According to the organic wastewater energy-saving treatment system provided by the invention, organic matters in organic wastewater can be greatly reduced through oil separation treatment of the reservoir and filtration and coalescence separation treatment of the filtration coalescence device, so that the purpose of recovering the organic matters is achieved; through multi-effect evaporation of the I-effect falling film evaporator, the II-effect falling film evaporator and the forced circulation evaporator, generated steam is recycled through the MVR compressor, cyclic utilization of secondary steam energy is achieved, and energy consumption is reduced; and the wastewater can be recycled through a multi-effect evaporation and resin adsorption treatment mode, and the recovery rate reaches 96%. The steam consumption for wastewater treatment can be reduced by 0.90 t / m < 3 >.

The invention belongs to the technical field of air conditioner outdoor unit cooling, and discloses a device for cooling an air conditioner outdoor unit through condensate water, which comprises an outdoor unit, a cooling mechanism is arranged on the outer side of the outdoor unit, and the cooling mechanism comprises a water storage tank cooling fin, melt-blown cloth, a communicating vessel and a baffle plate. The condensate water naturally generated in the operation process of the air conditioner is fully utilized, additional laying of a water source pipeline or purchasing of a water source is not needed, the energy-saving and environment-friendly purposes are achieved from the source, and the equipment operation cost is reduced. By means of the cooling mode combining evaporation heat absorption and air forced circulation, compared with traditional heat dissipation only depending on a fan, the heat dissipation efficiency of the air conditioner outdoor unit can be remarkably improved, the outdoor unit can work in a more suitable temperature environment, the operation performance of refrigeration, heating and the like of an air conditioner is effectively guaranteed, faults caused by overheating are reduced, and the service life of the air conditioner is prolonged. And therefore, the overall service life of the air conditioning equipment is prolonged, the user experience and the equipment cost performance are improved, and actual application and operation are facilitated.

The utility model discloses an evaporation system. The evaporation system comprises a crystallization chamber, the feeding channel is used for introducing materials into the crystallization chamber; one end of the first heating chamber is communicated with the crystallization chamber; one end of the second heating chamber is communicated with the crystallization chamber; the forced circulation pump, the crystallization chamber, the first heating chamber, the forced circulation pump and the second heating chamber are communicated with one another to form a circulation flow channel, the feeding channel is communicated with the circulation flow channel and used for introducing materials into the circulation flow channel, the forced circulation pump comprises a liquid inlet pipeline and a liquid outlet pipeline, the liquid inlet pipeline is communicated with the first heating chamber, and the liquid outlet pipeline is communicated with the second heating chamber. Materials sequentially flow through the second heating chamber, the crystallization chamber, the first heating chamber, the liquid inlet pipeline and the liquid outlet pipeline from the liquid outlet pipeline in the circulating direction.

The invention discloses a modular multi-fuel industrial burner plasma igniter with an efficient cooling structure. The modular multi-fuel industrial burner plasma igniter comprises an ignition module, an efficient cooling module, a fuel adaptation module and an intelligent control module. A plasma arc generator is arranged in the ignition module and is used for generating a high-temperature ignition source; the efficient cooling module adopts a multi-layer surrounding type flow channel design, and active heat management of the ignition module is achieved through forced circulation of a cooling medium; the fuel adaptation module supports rapid switching and stable supply of various fuels such as natural gas, fuel oil and biomass gas through standardized interfaces and pipelines; the intelligent control module integrates ignition control, fuel switching and thermal management strategies, monitors the system state in real time and automatically adjusts operation parameters. By means of the modular architecture and the efficient cooling technology, the problems that a traditional plasma igniter is prone to overheating damage, poor in adaptability and difficult to maintain under the high-temperature and multi-fuel working conditions are solved.

The utility model discloses a rare earth chloride concentration and separation system which comprises a pipeline assembly, the pipeline assembly is at least used for passing of a rare earth chloride solution, a preheater and an evaporator are connected to the pipeline assembly, and a heater is arranged in the evaporator. The rare earth chloride solution sequentially passes through the preheater, the evaporator and the heater in the flowing process in the pipeline assembly. A cleaning assembly is arranged on one side of the evaporator and at least used for cleaning a rare earth chloride solution. A steam input assembly is arranged at one end of the evaporator and at least used for inputting steam into the evaporator. A valve assembly is arranged on the pipeline assembly, and the valve assembly is at least used for controlling the on-off of the pipeline assembly. The heater is arranged in the evaporator, a connected circulating pipeline and a forced circulating pump for evaporation are not arranged between the heater and the evaporator, the circulating pipeline or the circulating pump can be prevented from being blocked by crystals in the high-concentration and low-temperature process, and long-period stable operation of the system is guaranteed.

The invention relates to a recycling device and method for flue gas waste heat of a sintering machine, and the recycling device comprises the sintering machine, a flue gas evaporator, a dust removal device, a flue gas conveying device and a chimney which are connected in sequence in the flue gas conveying direction; the sintering machine comprises a crushing device arranged at the tail part of the sintering machine and a chute arranged at the lower part of the crushing device; a flue gas cover is arranged on the sintering machine, a first flue gas outlet is formed in the flue gas cover at the tail part of the sintering machine, and a second flue gas outlet is formed in the flue gas cover at the chute; the flue gas evaporator comprises a forced circulation evaporator and a natural circulation evaporator; the first flue gas outlet is connected with the forced circulation evaporator; and the second flue gas outlet is connected with the natural circulation evaporator. Flue gas at different positions of the sintering machine is subjected to heat exchange, the waste heat recovery efficiency is improved, double operation systems are adopted for heat exchange, and the system energy consumption is reduced while the factory space is reasonably utilized.

The application belongs to the technical field of heat exchanger of chemical equipment, and particularly discloses a forced circulation evaporator with built-in heat exchange, which comprises a heat exchange device, a heating device and an evaporator shell, wherein the heat exchange device is provided with a steam inlet and a condensate outlet; the heating device is arranged outside the heat exchange device and comprises a heater and a feeding cavity; the bottom side of the feeding cavity is provided with an opening and is in gap cooperation with the heater, so that the raw material flows down along the outer sidewall of the heater after passing through the feeding cavity; the evaporator shell is used for containing the heat exchange device and the heating device; an upper cavity is arranged on the heat exchange device and is in communication with the heat exchange device; and the forced circulation device comprises a circulating pump arranged at the bottom of the inner side of the evaporator shell and a circulating pipe, and the circulating pump is in communication with the inside of the heat exchange device through the circulating pipe and is connected to the upper cavity. The heat exchange device is reasonably arranged on the inner side of the evaporator, so that the occupied space is reduced, the heat preservation and insulation are better, and the utilization rate is effectively improved.

A cooling system is provided with: a cooling unit having a plurality of cooling devices for cooling a heating element, an inlet-side header for distributing a refrigerant to the cooling devices, and an outlet-side header from which the refrigerant is discharged from each of the cooling devices; a natural circulation unit having a natural circulation line connecting the outlet-side header and the inlet-side header, and a first heat exchanger provided midway along the natural circulation line and above the cooling unit; and a forced circulation unit having a forced circulation line connecting the outlet-side header and the inlet-side header, a second heat exchanger provided midway along the forced circulation line and having a capacity larger than that of the first heat exchanger, and a pump provided in the forced circulation line and pressure-feeding the refrigerant from the outlet-side header to the inlet-side header.

The utility model discloses condensing equipment for heat loss control forced circulation evaporation, which relates to the technical field of condensing equipment and comprises a condensing tank, a cooling mechanism is arranged on one side of the condensing tank and comprises a cooling water tank, a circulating pump is fixedly arranged on the outer side wall of the cooling water tank, and a first guide pipe is fixedly arranged at the side end of the circulating pump. A spiral cooling pipe is arranged on the inner side of the condensation tank, a second guide pipe is fixedly arranged at the top of the cooling water tank, a feeding mechanism is arranged on one side of the condensation tank and comprises a feeding barrel, a conveying pump is arranged on one side of the feeding barrel, a conveying shaft is rotationally arranged on the inner side of the feeding barrel, and an auger is fixedly arranged on the conveying shaft. Materials at the bottom of the condensation tank are pumped out through the discharging pipe through the conveying pump, the materials are conveyed to the top of the feeding barrel and then conveyed into the condensation tank through the feeding pipe, then the materials at the bottom in the condensation tank are conveyed to the top in the condensation tank, the materials covering the bottom in the condensation tank are effectively cooled through circulating feeding, and then the materials are cooled evenly.

This invention relates to the field of industrial heating equipment technology, specifically to a high-temperature oven system and its control method that integrates radiant heating and forced-air heating. A bottom heating tube is installed in the working chamber formed by the inner shell, and left and right heating tubes are installed in the air ducts on both sides, forming a heating component that integrates radiant and forced-air functions. A circulating air duct assembly, consisting of a circulating fan, a perforated air duct plate, and outlet / return air ducts, achieves forced circulation of hot air. During the heating phase, all heating tubes are activated for radiant heating to achieve rapid temperature rise. During the constant-temperature phase, the heating tube power is reduced, and the system relies on the circulating fan to drive airflow through the heating tubes in the air duct for circulating heating to maintain temperature uniformity. This effectively balances rapid heating and temperature uniformity, overcoming the inherent defects of a single heating method.

The present invention discloses a coke oven raw gas waste heat recovery and utilization device, comprising a raw gas system and a steam-water system. The raw gas system comprises coke oven raw gas, a riser heat exchanger and an ammonia water spraying device. The raw gas flows through the inner cylinder of the riser heat exchanger through heat exchange and then enters the top pipe. The top pipe is connected to the ammonia water spraying device. The high-temperature and high-pressure water in the riser heat exchanger enters the steam-water system through a pipe. The steam-water system comprises a steam drum, a desalted water tank, a deaerator, a deaerator feed water pump, a steam drum feed water pump and a forced circulation pump that are interconnected. The process flow of the present invention is simple and reasonable, with automatic control and high safety. The riser heat exchanger has a simple structure, solves the problem of "fear of coking and blocking the riser", and has the ability to prevent "fear of dry burning and repeated water on and off". The double steam drum technology avoids dry burning of the riser heat exchanger, extends the service life of the riser heat exchanger, and ensures that saturated steam will not be interrupted.

This utility model belongs to the technical field of MVR evaporators, specifically relating to an MVR evaporation crystallization device. It includes: a forced circulation system, a hydrocyclone, a thickener, and a centrifuge. In the forced circulation system, material sequentially enters a first heater, a circulation pump, a second heater, and a separator through circulation pipes, then returns to the first heater, forming a cycle. The circulation pipes are connected to a feed pump and a discharge pump. The hydrocyclone inlet is connected to the output end of the discharge pump. The hydrocyclone overflow outlet and underflow outlet are respectively connected to a mother liquor tank and a thickener. The thickener's clear liquid overflow outlet and crystal slurry outlet are respectively connected to the mother liquor tank and the centrifuge. The centrifuge's liquid outlet and solid outlet are connected to the mother liquor tank and the outside environment. This utility model achieves equipment compactness through skid-mounted integrated design and process optimization; by using the hydrocyclone for low-concentration material intake, the thickener does not require a large buffer space, further saving space.

The application relates to a falling film series forced circulation evaporation crystallization integrated device, belonging to the technical field of falling film evaporators, which comprises a supporting assembly, a falling film evaporator, a forced circulation assembly and a crystallization assembly; the falling film evaporator, the forced circulation assembly, the crystallization assembly and a connecting assembly are connected to the supporting assembly; the crystallization assembly is connected to the forced circulation assembly through the connecting assembly; the forced circulation assembly is connected to the falling film evaporator through the connecting assembly; the forced circulation assembly is used for circulating heating of the solution in the crystallization assembly, and the steam generated by the heated solution is transmitted into the falling film evaporator through the connecting assembly. The forced circulation assembly is used for circulating heating of the solution in the crystallization assembly, and the steam generated by the heated solution is transported to the falling film evaporator through the connecting pipe as an auxiliary heat source, so that the step-by-step utilization of heat energy is realized, and the steam consumption is reduced; the components are connected through the connecting pipe to form a closed circulation system, so that material leakage is avoided, and the system stability is improved.

The utility model provides an automatic temperature control system in a roasting furnace, and belongs to the technical field of roasting furnace temperature control. One end of each water-cooling coil pipe is connected to a water-cooling coil pipe outlet header, the other end of each water-cooling coil pipe is connected to a water-cooling coil pipe inlet header, and a plurality of water-cooling coil pipes are arranged between the water-cooling coil pipe outlet header and the water-cooling coil pipe inlet header. The two ends of the water cooling coil pipes penetrate through the box body, sleeves are arranged on the inner side of a cover plate of the box body, the multiple sets of water cooling coil pipes are arranged on a main pipeline of the water supply pipeline and a main pipeline of the water outlet pipeline in parallel, and electric valves are arranged on branch pipelines of the water supply pipeline and branch pipelines of the water outlet pipeline. Heat exchange of each group of water-cooling coil pipes is controlled through the electric valves, so that a large amount of cost is saved, and the economic benefit is remarkable; a water supply pump is additionally arranged on a water supply pipeline, natural circulation is changed into forced circulation, the pipe diameter of the water supply pipe is reduced to 38 mm from original 98 mm, and safe operation of a water-cooling coil pipe explosion inlet and roasting furnace is guaranteed.

The invention discloses a system for preparing large-particle cobalt chloride hexahydrate through ultralow-temperature evaporative crystallization, which comprises a stock solution tank, a forced circulation pump, a forced heat exchanger, an ultralow-temperature crystallizer and a vacuum unit, the stock solution tank is connected with the forced circulation pump through a preheating unit, the forced circulation pump is located between the forced heat exchanger and the ultralow-temperature crystallizer, and the vacuum unit is connected with the forced heat exchanger. The forced circulation pump is used for circularly conveying a cobalt chloride solution to enter the forced heat exchanger to be heated and then enter the ultralow-temperature crystallizer to be subjected to flash evaporation, the ultralow-temperature crystallizer is connected with a centrifugal machine, and a gas treatment unit is arranged between the ultralow-temperature crystallizer and the forced heat exchanger; the gas treatment unit is used for treating secondary steam generated by flash evaporation and then supplying the treated secondary steam to the forced heat exchanger, and the vacuum unit is connected with the forced heat exchanger and used for maintaining a low-temperature environment for the ultralow-temperature crystallizer; no matched cooling crystallization equipment is needed, crystallization is directly completed through an ultralow-temperature evaporation and crystallization integrated process, the technological process is shortened, and the equipment investment and the occupied area are reduced.

This invention discloses an anodizing process and apparatus for the inner wall of a metal container, relating to the field of metal surface treatment technology. The apparatus includes a cathode and a circulation system; the cathode is inserted into the inner cavity of the metal container through an opening; the circulation system includes at least a circulation pump and an inlet pipe, the outlet of which is configured to be positioned at the bottom of the container's inner cavity; wherein the opening of the metal container is configured as an overflow outlet for the electrolyte. This invention, through forced circulation, allows the electrolyte to enter from the bottom and exit from the top of the container, forming a flow pattern of bottom inlet and top overflow. This effectively improves the flow field distribution within the container cavity, promptly removes reaction heat and discharges oxidizing gases, significantly improving the uniformity and density of the anodized film on the inner wall and reducing film defects.

This invention relates to the field of natural gas transmission technology, specifically to an inhibitor addition device for gas pipelines. The device includes a storage tank, a heat exchange shell, a gas pipeline, a feeding port installed on the outer wall of the storage tank, and a circulation assembly connecting the storage tank and the heat exchange shell. The storage tank has a first and a second partition fixedly installed at its upper and lower parts. Through the combined design of a stirring and temperature control assembly, an edge stirring assembly, and a tumbling assembly, the device achieves central stirring, edge stirring, and upper and lower tumbling functions. The rotation of the serpentine stirring tube ensures full-area stirring of the agent in the central region. The edge stirring rods, through a combination of revolution and rotation, precisely cover the dead corners around the tank wall. The auger of the tumbling assembly achieves forced circulation of the agent between the upper and lower layers through axial transport. This completely overcomes the component stratification and sedimentation problems caused by static storage in traditional storage tanks, ensuring that the inhibitor concentration remains consistent across all areas and significantly improving the stability and reliability of the corrosion inhibition and anti-clogging effects after injection into the pipeline.

The utility model discloses a forced circulation evaporation crystallizer, which comprises a feed pump, the circulating separation assembly comprises a heater, an evaporation separator, a circulating pump and a discharging pump; the condensation assembly comprises a condenser, a condensation water tank and a condensation water pump; the solid-liquid separation assembly is used for carrying out solid-liquid separation on the materials discharged by the discharging pump, separated solids are discharged out of the system, one part of mother liquor is discharged out of the system, and the other part of mother liquor is returned to the circulation separation assembly; the negative pressure assembly comprises a vacuum pump. According to the forced circulation evaporation crystallizer, condensate water generated during evaporation and concentration operation is conveyed into the circulation separation assembly and the solid-liquid separation assembly in a branch mode through the condensate water pump, sediment and crystallizers accumulated in a pipeline are washed, cleaning of the interior of the pipeline is achieved, materials are avoided, and stable proceeding of follow-up equipment production is guaranteed.

The invention discloses a water pipe type two-return-stroke energy-saving and emission-reducing superheater assembly of a traditional boiler, and relates to the superheater assembly researched and developed according to the wide-capacity radiation heat exchange concept of a boiler hearth and the physical phenomenon outside the field (see the specification in details) capable of generating extremely few nitrogen oxides, and a traditional boiler body with the modified hearth. After the flange pipelines are connected and combined, the technical advantages brought by obvious technical characteristics are derived: the heat efficiency is improved by about 6-8%, the steel consumption is reduced by about 20%, and the cost is reduced by 30% due to the application of the boiler hearth tolerance radiation heat exchange concept; forced circulation medium water is in a water pipe of the two-return-stroke energy-saving emission-reducing superheater assembly, the heat exchange second flow speed is increased to about 1.5 m, the technical characteristic completely meets the requirement of physical phenomena outside the field capable of generating extremely few nitric oxides, and the purpose of ultralow nitrogen emission of the nitric oxides smaller than or equal to 15 / 25 milligrams is achieved; meanwhile, other technical problems of the product in the background technology are solved.

The application provides a small-sized pressurized water reactor, relates to the technical field of nuclear power, and aims at improving the technical problem that the reactor main loop is not simplified and the equipment is not miniaturized due to the existence of a coolant pump in the prior art small-sized pressurized water reactor with forced circulation. The application comprises a pressure vessel, a reactor core, a heat exchanger, a stabilizer and a coolant driving device, wherein the coolant driving device comprises a driving rotor assembly arranged in the inside of the pressure vessel and a driven rotor assembly arranged in the outside of the pressure vessel; the driving rotor assembly comprises a driving motor and a driving rotor connected with the driving motor; the driven rotor assembly comprises a driven rotor and an impeller connected with the driven rotor; and the driving rotor is magnetically connected with the driven rotor. The application adopts the magnetic connection between the driving rotor and the driven rotor, and no corresponding connecting part is arranged on the pressure vessel, so that the safety is ensured while the equipment volume is reduced.

This utility model discloses an energy-saving forced-efficiency evaporation device for alumina production, including an evaporator flash evaporator, a forced circulation separator, a primary forced-efficiency heater, a feed mother liquor inlet, a discharge mother liquor pipe, and a secondary forced-efficiency heater. After the forced-efficiency circulation evaporation device is arranged, a primary forced-efficiency heater and a secondary forced-efficiency heater are respectively set at the inlet and outlet of the forced circulation separator. The area of ​​the two forced-efficiency heaters is half of the original area. The total area of ​​the two heaters will not be reduced, but the area of ​​a single forced-efficiency heater is reduced by 50%. Therefore, the amount of mother liquor required for circulation can be reduced by about 50%, and under ideal conditions, the flow rate of the forced-efficiency circulation pump can be reduced by about 50%.

The invention discloses an electrolytic bath heat management and waste heat utilization system, which belongs to the technical field of hydrogen energy preparation, and comprises a sealing box body, the sealing box body is filled with heat conduction oil, and the sealing box body is filled with the heat conduction oil; the electrolytic bath is positioned in the sealed box body, and the electrolytic bath is immersed by the heat-conducting oil; the circulating part comprises a circulating pipeline, a temperature control unit and a heat exchanger, the heat conduction oil inlet and the heat conduction oil outlet of the sealing box body are connected through the circulating pipeline, and the temperature control unit and the heat exchanger are both installed on the circulating pipeline. According to the invention, the whole electrolytic cell is immersed in the sealed box body filled with the heat conduction oil, accurate temperature control of the electrolytic cell is realized through forced circulation of the heat conduction oil, and the absorbed waste heat is transferred to the external heat exchanger for effective recycling, so that the operation efficiency and the stability of the electrolytic cell are improved, and the overall energy consumption of the system is remarkably reduced.

The utility model relates to the technical field of heating reaction equipment, and provides a rotary reaction furnace which comprises a rack, a high-temperature furnace, a rotary cylinder, an inner cylinder and a driving assembly, the two ends of the rotating cylinder are connected with a detachable air inlet sealing cylinder and a detachable air outlet sealing cylinder respectively, and dynamic sealing is achieved through a sealing structure. The inner cylinder is coaxially arranged in the rotating cylinder to form an independent cavity, a cooling gas channel is arranged in the rotating cylinder, and rapid cooling is achieved through forced circulation. Oxygen is emptied between the rotating cylinder and the inner cylinder through a vacuum pump, protective gas is introduced to form a positive pressure barrier, and the explosion risk is eradicated. According to the utility model, through the modular design, the inner cylinder and the sealing cylinder can be quickly disassembled, and the maintenance cost is reduced; multiple safety protection devices effectively improve the safety of the equipment; the cooling channel design obviously shortens the cooling time and improves the equipment turnover rate; the device is suitable for preparing powder materials such as carbon nanotubes, and has the advantages of being compact in structure, convenient to operate, high in safety and the like.

The invention relates to the technical field of coking, and discloses a coke oven flue gas waste heat recovery boiler and a waste heat boiler acid dew corrosion prevention method, the coke oven flue gas waste heat recovery boiler comprises a steam pocket, a circulating pump and fin heat exchange tubes; the steam pocket is connected with the fin heat exchange tube and is also connected with the circulating pump; and the circulating pump is also connected with the fin heat exchange tube. A natural circulation mode of the boiler is changed into forced circulation, and uniform circulation of the boiler is guaranteed, so that stable temperature of the pipe wall is guaranteed, and acid dew corrosion and ash deposition are avoided.

The invention discloses a multi-chamber carbon fiber pre-oxidation furnace, an external hot air circulation system and a control method, and relates to the field of carbon fiber pre-oxidation. According to the pre-oxidation furnace, two inner sealing chambers and two outer sealing chambers are symmetrically distributed at the front end and the rear end of a main oxidation chamber, and the adjacent chambers are communicated through a separation device to form a sealed furnace body; the furnace external hot air circulating system comprises a main oxidation chamber hot air circulating system, an inner sealing chamber hot air circulating system and an outer sealing chamber wind power circulating system which are respectively communicated with corresponding chambers; according to the control method, the hot air circulation system outside the furnace is used for enabling each chamber to meet the requirements that Pb < Pa < Pc < = P0 and Tb is approximately equal to Ta > Tc. The main oxidizing chamber has a stable wind field and a stable temperature field, and it is guaranteed that the tow oxidizing reaction is uniform; harmful gas leakage in the reaction process is avoided by controlling the pressure difference of the five chambers; reaction heat is taken away through forced circulating air in the outer sealing chamber, and the problem that tows wind a roller is avoided; and the energy consumption is reduced by controlling hot air recycling of the inner sealing chamber and the multi-stage pre-oxidation furnace.

An oil conservator is located at the top of an oil storage tank and communicated with the oil storage tank through an oil inlet, an oil outlet is connected with a circulating pump, the circulating pump is communicated with the oil conservator through an oil conveying pipe, a one-way valve is arranged at the connecting position of the circulating pump and the oil conveying pipe, and a flow meter is arranged on the oil conveying pipe. And the temperature detector is arranged in the oil conservator. The circulating pump is started, oil at the bottom of the oil storage tank is pumped out and conveyed into the oil conservator in a one-way and quantitative mode through the oil conveying pipe, and therefore forced circulation is formed, the fluidity of the oil is improved, the temperature change of the oil is monitored through the temperature detector arranged in the oil conservator, and high-flow insulating oil is monitored in real time through the temperature detector and the flow meter. Through combination of natural convection and forced circulation, the temperature change in the oil storage tank can be sensed in time, effective monitoring and management of insulating oil in the transformer are realized, and the safety performance and reliability of the transformer are improved.

The invention relates to the technical field of radioactive waste liquid treatment, in particular to a method for recycling nitric acid in uranium purification raffinate by adopting a heat pump rectification technology. According to the method, the nitric acid in the uranium purification raffinate is recovered by adopting a vacuum distillation technology, and the steam at the top of the rectifying tower is pressurized and heated by a heat pump compressor to serve as a heat source of a tower bottom reboiler and a feed preheater, so that the energy of the steam at the top of the rectifying tower is recycled, and the energy consumption of production operation is reduced. Meanwhile, the blockage of the reboiler is reduced through the arrangement of a pretreatment system, a forced circulation system and the like; and through the arrangement of the steam washing tower, the heat pump compressor is prevented from being damaged by acid steam, so that the operation stability of the whole system is improved, and the overhaul frequency is reduced.

The utility model relates to the technical field of evaporative crystallization, in particular to efficient heat loss control forced circulation evaporative crystallization equipment. The device comprises a heating chamber, the top end of the heating chamber is provided with a steam treatment assembly, a through pipe is inserted into the bottom of the heating chamber in a penetrating mode, a valve is arranged on the through pipe, a conical evaporation crystallization chamber is installed at an end opening of the through pipe, and a discharging pipe is arranged on the outer side of the conical evaporation crystallization chamber in a penetrating mode; steam generated in the conical evaporation crystallization chamber is condensed in a treatment kettle and an upper cavity in the steam treatment assembly to generate condensed water, heat energy in the condensed water is recycled through heat exchange between a cylindrical heat exchanger and the condensed water, loss of the heat energy is further reduced, meanwhile, a feeding solution injected into a lower cavity is preheated, and the feeding solution is recycled. And extra heat energy required in the evaporative crystallization process is reduced, so that the energy consumption is effectively reduced, the energy utilization efficiency is improved, and the energy waste is reduced.

The utility model provides a water pump forced circulation cooling system which comprises a water pump shell, a centrifugal impeller is arranged in the water pump shell, a circulating water diversion flow channel is formed in a shell body of the water pump shell, and a water inlet of the circulating water diversion flow channel is arranged on the outer portion of the water outlet side of the centrifugal impeller in an abutting mode. The water inlet area of the water pump shell is provided with a circulating water return flow channel. Flame extinguishing exhaust in the system is communicated with a circulating water diversion flow channel through a water diversion pipe to complete cooling water inflow, and high-pressure water on the water outlet side of an impeller of the centrifugal water pump is introduced into a cooling cavity of the flame extinguishing exhaust. Cooling water in a cooling cavity of the flame-extinguishing exhaust is led to a circulating water return flow channel through a water return pipe, and the circulating water flow can take away most heat in the flame-extinguishing exhaust cavity, so that flame-extinguishing exhaust cooling is realized, and an operator is prevented from being scalded due to high temperature of exhaust during operation of a water pump of an internal combustion engine.

The utility model relates to the technical field of polycrystalline silicon production equipment, in particular to a distilled water recycling system of an MVR (Mechanical Vapor Recompression) device in polycrystalline silicon production. The steam preheater is communicated with the distilled water preheater; the forced circulation heat exchanger is communicated with the steam preheater; the forced circulation pump is communicated with the forced circulation heat exchanger; an inlet of the crystal separator is communicated with the forced circulation pump; the secondary separator is communicated with the crystallization separator; the steam compressor is communicated with the secondary separator; the liquid accumulation tank is respectively communicated with the steam compressor and the secondary separator; the distilled water tank is respectively communicated with the steam preheater, the forced circulation heat exchanger and the liquid accumulation tank; the distilled water preheater is communicated with the distilled water tank; the circulating water heat exchanger is communicated with the distilled water preheater; the condensate water tank is communicated with the circulating water heat exchanger; and the steam compressor is communicated with the condensed water tank. According to the utility model, the cyclic utilization of distilled water can be realized, and the use amount of desalted water is reduced.