299 results about "Forced circulation" patented technology

The electroplating barrel plating equipment comprises an electroplating bath and a roller, one end of the roller is rotatably installed on a first supporting plate through a first rotating shaft, the other end of the roller is rotatably installed on a second supporting plate through a second rotating shaft, the roller is provided with an opening capable of being buckled, the opening is used for taking and placing a to-be-plated part, and a plurality of through holes are formed in the side wall of the roller; a plurality of conductive rods are arranged in the roller in the circumferential direction, a plurality of conductive heads are arranged on each conductive rod at intervals, the conductive rods extend in the length direction of the roller, one end of each conductive rod extends to the second rotating shaft to form a conductive end, and a first conductive bearing bush and a second conductive bearing bush corresponding to the conductive ends are arranged on the second supporting plate. The invention further comprises a plating solution forced circulation system. The contact area of the conductive head and a to-be-plated part is increased, the problems of virtual connection and overheating caused by floating of the free conductive head are solved, meanwhile, the plating solution forced circulation system enables the temperature and ion concentration of plating solutions inside and outside the roller to be more uniform, and the electroplating efficiency and quality are improved.

The invention relates to the technical field of wastewater treatment equipment, in particular to a forced circulation evaporation crystallizer with a refrigeration loop, which comprises a circulation pipe, a preheating chamber, a stock solution pipe, an input outer pipe, an output outer pipe, a compression pipe, a crystallization pipe, a liquid distributor, a flow combiner, a heat exchange outer pipe and a transition pipe, through the superposition design of the heat exchange outer pipe and the heat exchange inner pipe, the heat obtained by the high-salinity wastewater in the single circulation process is greatly increased, the evaporation efficiency of the high-salinity wastewater in the single circulation process is improved, the circulation times required by the treatment of the high-salinity wastewater in unit volume are reduced, and the energy consumption is reduced. Therefore, the use energy consumption of the forced circulation evaporation crystallizer is reduced.

The invention relates to the technical field of vacuum concentration, in particular to double-effect vacuum concentration equipment, mainly aims to solve the problems that in the prior art, the evaporation rate is low, energy loss is large, nutritional ingredients in materials are prone to being damaged, and the flavor and taste of the materials are difficult to guarantee, and adopts the following technical scheme that the double-effect vacuum concentration equipment comprises a feeding pipe, a first-effect heater is arranged outside the first-effect circulating pipe, a first-effect evaporation chamber is arranged on the side, away from the first-effect heater, of the first-effect circulating pipe, a first-effect upper pipe box outlet is formed outside the first-effect heater, and the first-effect upper pipe box outlet is communicated with the first-effect evaporation chamber; the external heating forced circulation evaporation mode is adopted, the evaporation speed is high, the concentration ratio is large and can reach 1.3 (common traditional Chinese medicine extract), two-effect simultaneous evaporation is adopted in the concentrator, secondary steam is fully used, boiler investment is saved, energy consumption is reduced, and compared with other evaporators, the energy consumption is reduced by 40%.

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 thermoplastic composite material forming preparation, and relates to an automatic thermoplastic composite material part laying device and method based on an oil heating mold. The device comprises a forming mold and a high-heat-conduction oil circulating system, a profiling runner network is integrated in the mold, and the runner layout is dynamically adjusted according to the local curvature radius and is combined with a high-temperature stable material to achieve efficient heat conduction. Through the three-stage process of forced circulation heating of high-thermal-conductivity silicone oil, prepreg laying and gradient cooling, and by dynamically adjusting the oil temperature and the flow speed, the fusion interface bonding and non-isothermal crystallization behaviors are synchronously optimized. The problems of large temperature gradient, dynamic response delay, high energy consumption and the like of a traditional heating scheme are solved, high-precision forming of a complex molded surface workpiece is achieved, the comprehensive energy consumption is low, and an efficient equipment foundation is provided for automatic manufacturing of thermoplastic composite materials.

The utility model discloses a low-temperature bath liquid cooling circulation device which comprises a low-temperature bath body, a bath body of the low-temperature bath body is of a rectangular groove-shaped structure, a magnetic stirring mechanism is arranged at the bottom of the bath body, and a liquid collecting tank is arranged below the magnetic stirring mechanism. One side of the liquid collecting tank is connected with the liquid inlet end of a circulating pump through a liquid guide pipe, and the liquid outlet end of the circulating pump is connected with a three-way control valve. And while forced circulation of the heat exchange medium is achieved, the opening positions of the backflow liquid injection assembly are evenly arranged, and the uniformity of the temperature of the heat exchange medium can be further improved.

The invention belongs to the field of new energy power generation systems, and discloses a forced circulation steam generation system variable load operation optimization method and related equipment.The method includes the steps that a tube shell type evaporator numerical calculation model and a forced circulation system hydrodynamic balance model are established, and high evaporation capacity, evaporator efficiency and minimum cost serve as optimization targets; a multi-objective optimization model is constructed by combining the change of the flow of the fused salt and the flow of the circulating water; the model is solved by adopting a Pareto dominating method, and a Pareto optimal solution set can be output, so that optimized operation schemes of the forced circulation system under different loads can be formulated according to the optimal solutions; by the adoption of the method, high evaporator efficiency and evaporation capacity can be achieved, meanwhile, pump work loss can be effectively reduced, the key target in operation of the photo-thermal power station is achieved, namely, balance of high efficiency and low loss is achieved, and powerful support is provided for stable operation and economic benefits of the photo-thermal power station.

The invention relates to the field of wastewater treatment, and particularly discloses a forced circulation evaporator which comprises a heating chamber, a wastewater storage tank arranged on one side of the heating chamber, a lower circulation pipe arranged at the lower ends of the heating chamber and the wastewater storage tank, a circulation pump arranged at one end of the lower circulation pipe and an upper circulation pipe arranged at the upper ends of the heating chamber and the wastewater storage tank. The heating chamber is provided with a heating mechanism, the heating mechanism comprises a vertical shaft rotationally connected to the middle of the heating chamber, and heating plates are evenly arranged on the side wall of the vertical shaft in a surrounding mode. A water pressure cleaning mechanism used for cleaning the heating plate is arranged on the inner side of the heating chamber. According to the forced circulation evaporator, the heating mechanism is arranged in the heating chamber in a rotating mode, so that the temperature gradient in liquid is reduced, the heating uniformity is improved, subsequent evaporative crystallization of a wastewater storage tank is facilitated, wastewater is evaporated in a forced circulation mode, the efficiency is high, and the effect is good.

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 invention discloses a regeneration gas heat recovery process system for a wet decarburization technology. The regeneration gas heat recovery process system sequentially comprises an absorption unit, a lean and rich liquid heat exchange unit and a regeneration unit which are connected, the regeneration unit comprises a regeneration tower, and a regeneration section and a regeneration gas washing system are sequentially arranged in the regeneration tower from bottom to top; a section of one-way metal pipeline is introduced into the regenerated gas washing system to convey condensate to the front end of a rich liquid pump in the lean and rich liquid heat exchange unit; according to the invention, the regeneration gas washing section is additionally arranged at the upper part of the regeneration tower, the water vapor content in the regeneration gas is reduced through circulating spraying of the washing liquid, and the heat brought by the regeneration gas is reduced, so that the load of the tower top condenser and the regeneration energy consumption in the desorption process are reduced; secondly, the gas-liquid mass transfer effect can be enhanced through forced circulation spraying, and the operation loss of the absorbent is reduced; in addition, all condensed liquid in the process is collected to the rich liquid, so that the alkalinity of the rich liquid can be reduced, and sufficient desorption of carbon dioxide is 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 utility model discloses a system for extracting a biodiesel raw material from kitchen waste. The system comprises a pulping pulverizer, a mixing distributor, a heat exchanger and a three-phase separation tank, wherein the pulping pulverizer and the mixing distributor are connected through a slurry circulating pipe, and a forced circulating pump is arranged on the slurry circulating pipe; the heat exchanger is connected to the top of the mixing distributor, the three-phase separation tank is connected to the top of the heat exchanger, a horn-shaped filter cover is arranged in the middle of the interior of the three-phase separation tank, the top end of the horn-shaped filter cover is connected with a solid-liquid mixture circulating pipe, and the solid-liquid mixture circulating pipe is connected with the pulping pulverizer; the pulping pulverizer at the top end of the three-phase separation tank is connected with the secondary steam circulating pipe; the pulping pulverizer, the mixing distributor, the heat exchanger and the three-phase separation tank are all of a closed structure. The system disclosed by the utility model has the characteristics of high oil phase extraction rate, good oil-water separation effect and low energy consumption, and provides important technical support for promoting resource utilization of the kitchen waste.

The utility model belongs to the technical field of wastewater treatment, and relates to an MVR (Mechanical Vapor Recompression) process device for sintering desulfurization and denitrification wastewater treatment. The MVR process device comprises a wastewater pretreatment module and an MVR low-temperature forced circulation crystallization module which are connected in sequence; the sintering desulfurization and denitrification wastewater firstly enters the wastewater pretreatment module and then enters the MVR low-temperature forced circulation crystallization module, and the wastewater treated by the system can be directly recycled. Meanwhile, the process device disclosed by the utility model can be operated at low temperature; and therefore, scaling of a process device and corrosion of equipment can be avoided. The process device disclosed by the utility model is short in operation flow, small in occupied area and capable of fully utilizing the heat of secondary steam and greatly reducing the cost. In addition, the equipment is simple and convenient to maintain, long in chemical cleaning period, effective and stable in scaling control and long in service life, and is very potential wastewater treatment equipment.

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 belongs to the technical field of industrial crystallization, and discloses a nickel sulfate continuous crystallization system. Comprising a stock solution storage tank, a pretreatment unit, a concentration unit and a crystallization unit, wherein the pretreatment unit comprises an iron remover, a filter and a preheating assembly which are sequentially communicated with a stock solution storage tank; the concentration unit comprises a forced circulation evaporator and a crystallization separator, and the crystallization unit comprises a cooling crystallizer, a cooling circulation pump, a hot crystal eliminator, a condenser, a condensed water tank, a vacuum pump, a thickener and a centrifugal machine. The nickel sulfate continuous crystallization system disclosed by the utility model is convenient to operate, high in continuous cooling crystallization efficiency and suitable for crystallization of nickel sulfate with different particle size requirements.

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 invention discloses a continuous enhanced washing desalination system and method for waste incineration fly ash, the system comprises at least three washing units which are connected in series, each washing unit comprises a washing tank, a hydrodynamic cavitator, a circulating pump, a first mud-water separator and a second mud-water separator which are communicated to form two sections of external circulating pipelines, and a washing liquid recycling pipeline is formed. The invention further discloses a method for treating the waste incineration fly ash through the system. According to the washing desalination system disclosed by the invention, deep elution desalination treatment is carried out on fly ash by adopting continuous three-stage stirring washing, two-stage forced circulation strengthening and two-stage mud-water separation, so that the desalination treatment on the fly ash can be efficiently and thoroughly completed on the premise of effectively reducing the water consumption; the device has the advantages of being simple in equipment, easy and convenient to operate, small in occupied area, low in cost, water consumption and energy consumption, high in elution efficiency, wide in application range, capable of continuously running, good in running stability and the like, and has an important promoting effect on reduction and resource utilization of the fly ash.

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 invention provides an improved thickener which comprises a conical container, a feeding pipe is arranged on the middle lower portion of the conical container in a communicating mode, feeding in the tangential direction is completed through the feeding pipe, a material guiding pipe is arranged at the bottom of the conical container in a communicating mode, and a forced circulation pump is arranged on one side of the conical container. The forced circulation pump is communicated with a forced circulation outlet pipe and a forced circulation inlet pipe, the forced circulation outlet pipe is communicated with the material guide pipe, the middle-lower part of the conical container is communicated with a material returning pipe, the material returning pipe is communicated with the forced circulation inlet pipe, a first motor is mounted at the top of the conical container, and a second motor is mounted at the bottom of the conical container. A stirring shaft is movably arranged in the conical container and is driven by the first motor. The problems that an existing thickener is poor in use effect, and a material guide pipeline and a valve at the bottom of the thickener are very prone to hardening and blocking are solved.

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 resource utilization device and process for wastewater generated during preparation of benzyl alcohol through toluene oxidation. The resource utilization device comprises a cryogenic absorption unit, a waste heat neutralization unit, a steam stripping separation unit and a waste heat concentration unit, the method comprises the following steps: capturing organic substances in free water through cryogenic capture, carrying out phase separation and recovery, adding an alkaline solution with a certain concentration for neutralization and preheating, converting a low-molecular acidic organic phase into sodium salt, carrying out steam stripping separation, separating organic phase substances dissolved in a sodium salt wastewater solution, and concentrating to obtain concentrated sodium salt wastewater which can be used as a denitrifying bacterium nutrient solution. Inorganic salt and organic phase in the acid-base adjusting preheating kettle can be thoroughly separated by adopting the stripping tower. A circulating pump adopts a large-flow and low-lift axial flow pump for forced circulation, a second reboiler is selected as a falling film type reboiler, a heat source of the reboiler adopts external 90-DEG C hot water waste heat for heating evaporation, and the reboiler tube nest and the like can be prevented from being blocked by selecting the combination of three forms. Sodium salt wastewater concentrated by the device is sold as a denitrifying bacterium nutrient solution.

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.