311results about "Evaporation with vapour compression" patented technology

An aqueous stream cleaning system including a circulation pump to receive a waste fluid and / or a concentrated liquid bottoms stream, and expel a circulation stream. The aqueous stream cleaning system can also include a primary heat exchanger to receive the circulation stream from the circulation pump. The primary heat exchanger can have a plurality of heat exchange plates that define an internal surface area for heat transfer from a distillate stream to the circulation stream to produce a cooled distillate stream and a heated circulation stream. The plurality of heat exchange plates can be spaced to facilitate free flow of solids in the circulation stream between the plurality of heat exchange plates. A mass flow rate and pressure of the circulation stream can be configured to minimize build-up of solids in the primary heat exchanger. The aqueous stream cleaning system can further include an evaporation unit to receive the heated circulation stream from the primary heat exchanger. The distillate stream is formed when steam in the heated circulation stream evaporates in the evaporation unit, and the concentrated liquid bottoms stream is formed from a portion of the heated circulation stream that does not evaporate.

A method for starting up vapor-recompression units comprises: providing a vapor recompression sub-system comprising one or more vapor-recompression units, wherein the vapor recompression sub-system has a vapor inlet and a compressed-vapor outlet; providing a means of reducing vapor density through pressure reduction in vapor communication with the vapor recompression sub-system; reducing pressure within the vapor recompression sub-system to reach a sub-system pressure selected from 0.1 kPa to 1000 kPa; introducing a vapor mass flow to the vapor recompression sub-system at a restricted vapor mass flow rate; starting up the vapor recompression sub-system while maintaining the restricted vapor mass flow rate for a start-up time period; and then, following the start-up time period, introducing additional vapor mass flow to the vapor recompression sub-system to reach a full vapor mass flow rate. The restricted vapor mass flow rate is from 0.1% to 90% of the full vapor mass flow rate.

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

The demister cleaning device comprises a first-effect evaporation module, a second-effect evaporation module, a third-effect evaporation module and a feeding pipe, the first-effect evaporation module, the second-effect evaporation module and the third-effect evaporation module are sequentially connected through the feeding pipe, and a third-effect demister in the third-effect evaporation module is connected to a condenser and a centrifugal water vapor compressor through a three-way pipe. The centrifugal water vapor compressor is connected into a first-effect heater in the first-effect evaporation module through a pipeline; a bypass valve is connected to the pipeline between the condenser and the first-effect heater and connected with the centrifugal water vapor compressor in parallel. A top inlet of the triple-effect demister is connected with a high-pressure water inlet pipe. Secondary steam generated by triple effect is recycled instead of directly entering the condenser to be condensed, the recycled secondary steam enters the centrifugal steam compressor to pressurize the triple effect secondary steam, and the triple effect secondary steam is supplied to the first-effect heater to be used for heating materials to replace original live steam, so that the purposes of saving energy and reducing consumption are achieved.

The invention discloses a vibration plate type anti-scaling MVR evaporator, and relates to the technical field of MVR evaporators. Comprising a compressor, a heater, a separator, a circulating pump and a heat exchanger which are connected with one another, the side end face of the heat exchanger fixedly communicates with a cold side inlet pipe and a hot side inlet pipe, the cold side inlet pipe is located on one side of the hot side inlet pipe, and an L-shaped fixed plate is fixedly installed on the side end face of the heat exchanger and located on the outer side of the cold side inlet pipe; an intercepting assembly is arranged on the L-shaped fixed plate; a mounting fixed plate and a stabilizing transverse plate are fixedly mounted on the heat exchanger, an auxiliary assembly is arranged on the mounting fixed plate and the stabilizing transverse plate, and a vibration transmission plate is arranged on the auxiliary assembly. Through cooperative use of the interception assembly and the auxiliary assembly, the anti-scaling capacity of the MVR evaporator is effectively improved, the heat exchange efficiency is improved, the service life of equipment is prolonged, energy consumption is reduced, and the use effect of the MVR evaporator is greatly improved.

The invention discloses a method for separating lithium and boron in a solution with a high boron-lithium ratio. The separation method comprises the following steps: carrying out primary homogeneous electrodialysis concentration separation on a solution with a high boron-lithium ratio under an alkaline condition to prepare primary lithium-rich concentrated water; diluting the first-stage lithium-rich concentrated water to prepare first-stage diluted lithium-rich concentrated water; performing high-pressure RO concentration on the primary diluted lithium-rich concentrated water under an acidic condition to prepare lithium-rich RO concentrated water; performing first-stage homogeneous phase electrodialysis concentration separation on the lithium-rich RO concentrated water under an acidic condition to prepare first-stage lithium-rich concentrated water; carrying out adsorption boron removal and desorption treatment on the first-stage lithium-rich concentrated water by adopting boron removal adsorption resin under an alkaline condition to prepare mixed lithium-rich concentrated water and boron-containing desorption liquid; carrying out MVR (mechanical vapor recompression) evaporation on the mixed lithium-rich concentrated water for preparing battery-grade lithium carbonate; and mixing the secondary boron-rich fresh water with the boron-containing desorption solution, and carrying out MVR evaporation to obtain a boric acid product. According to the method, a reasonable boron removal process combination is adopted, and boron in the solution with the high boron-lithium ratio is removed.

The utility model relates to the technical field of cleaning equipment, in particular to an MVR evaporator which is provided with an evaporator body, the evaporator body is provided with a stock solution inlet pipe, a condensate water outlet pipe and a water vapor compression system, the stock solution inlet pipe is provided with a heat exchanger, the condensate water outlet pipe is provided with a condensate water tank, and the condensate water tank is provided with a heating jacket. The heat exchanger is used for recovering the heat of the condensed water in the condensed liquid outlet pipe and preheating the stock solution, so that the effective utilization of energy sources and the improvement of the evaporation efficiency are realized; through recycling of the water vapor compression system, the MVR evaporator remarkably reduces the requirement for external steam, and therefore energy is saved; by arranging the condensate water tank and the heating jacket of the condensate water tank, a necessary initial steam environment is provided for the evaporator in the starting stage, the starting process of the evaporator is accelerated, and the overall operation efficiency is improved.

The utility model discloses an MVR (Mechanical Vapor Recompression) evaporation system for lactic acid production, which comprises a first-effect falling film evaporator, a second-effect falling film evaporator, a third-effect falling film evaporator, a first-stage steam compressor, a second-stage steam compressor and a third-stage steam compressor which are sequentially communicated in series along a material flowing direction, secondary steam generated by the second-effect falling-film evaporator and the third-effect falling-film evaporator is heated by the first-stage steam compressor and then enters the second-stage steam compressor to be compressed into secondary compressed steam, and one part of the secondary compressed steam enters the first-effect falling-film evaporator and the second-effect falling-film evaporator to evaporate and concentrate low-concentration lactic acid; the other part of secondary compressed steam and secondary steam generated by the first-effect falling film evaporator enter a third-stage steam compressor to generate third-time compressed steam, the third-time compressed steam enters a third-effect falling film evaporator to evaporate and concentrate lactic acid, and low-concentration lactic acid is evaporated and concentrated by using high-quality compressed steam; the consumption of fresh steam is effectively reduced, the energy consumption is reduced, and the evaporation and concentration cost is reduced.

The utility model relates to the technical field of lithium carbonate positive electrode material processing, in particular to an MVR (mechanical vapor recompression) evaporator for lithium carbonate positive electrode material processing. The MVR evaporator for processing the lithium carbonate positive electrode material comprises a heat insulation barrel, a discharging pipe, an electromagnetic valve I, an evaporation chamber and a connecting pipe I. The bottom in the heat insulation barrel is connected with the discharging pipe extending outwards, the electromagnetic valve I is installed at the upper end of the discharging pipe, the evaporation chamber is fixedly connected to the lower portion in the heat insulation barrel, and the right side of the upper portion of the evaporation chamber is connected with the connecting pipe I. By arranging the purification mechanism, steam is discharged into a spraying bin, a water pump operates to pump an oxidizing agent in a liquid storage box into a connecting pipe III, then the oxidizing agent is conveyed into a double-end pipe and sprayed into the spraying bin from two spraying heads to spray steam, steam purification is achieved, harmful substances of gas in the steam are removed, and the evaporator has the purification function; the problem that waste heat gas cannot be used immediately due to the fact that the waste heat gas needs to be treated additionally is effectively solved.

The present invention relates to a gravitational vapor compressor (GVC) device comprising at least one vertical compression chamber (16) and a plurality of droplet spray generating nozzles (10) are arranged at the top thereof, which nozzles form a flow of droplets in the water vapor flow along a height h1 of the vertical shell (16). The speed of the droplets from the droplet beams (10) is adjusted along the height h1 to the terminal fall velocity in relation to a gas flow, the compression chamber (16) has a height h2 from which droplets fall at the same or similar terminal velocity inside a water vapor flow, which compresses the water vapor. The gravitational vapor compressor device further comprises a secondary vapor outlet duct (13).

Described herein is an energy system (1) arranged to generate and use thermal energy, the energy system (1) comprising a mechanical vapor recompression (MVR) unit (3). The thermal energy of the working fluid is obtained during the MVR process performed by the MVR unit (3) and utilized outside the energy system, preferably for heating the process, space or object. The MVR unit comprises a main heat exchanger (5), a compressor (9), a main steam line (11) and a condenser (13). The MVR unit (3) preferably further comprises at least one liquid line (15) arranged to be connected to the condenser (13) and the main heat exchanger (5) for transferring condensed working liquid back to the main heat exchanger (5) for re-evaporation in the main heat exchanger (5). In one embodiment, the energy system (1) comprises at least one secondary heat exchanger (17) arranged for heat exchange between condensed working fluid flowing in the at least one liquid line (15) and external working fluid flowing in the at least one external fluid line (19) to use thermal energy generated by the MVR unit (3).

The application discloses an amino acid hydrolysate acid removal process using indirect MVR evaporation, and particularly relates to the technical field of amino acid hydrolysate acid removal processes, and comprises the following steps: S1, amino acid hydrolysate conveying, S2, hydrolysate evaporation under reduced pressure, S3, acid substance gas-liquid separation, S4, secondary steam conveying, and S5, liquid storage. The acid substance in the amino acid hydrolysate is evaporated and acid removal treated by adopting the MVR evaporation technology, so that the hydrolysate can form concentrated liquid and acid substance after being separated under reduced pressure, the generated acid substance is separated by a gas-liquid separator, and acid liquid and secondary steam are generated, the secondary steam can provide a secondary steam source for an evaporator after being compressed by a compressor, thereby providing a large amount of steam source for the evaporator, reducing the emission of acid gas, improving the resource utilization rate, achieving the protection of the environment, and avoiding the harm of acid gas to the human body.

The invention provides a mechanical vapor recompression-based dehumidizer regeneration type air water taking system, which comprises a moisture absorption unit, which comprises a gas-liquid contact reaction device, and is used for enabling a dehumidizer solution to be in full contact with air for mass transfer and heat transfer, and enabling the dehumidizer solution to absorb moisture in the air so as to be diluted; the mechanical vapor recompression evaporator comprises an evaporator and a compressor, the evaporator comprises a dilute solution inlet, a concentrated solution outlet, a vapor outlet, a vapor inlet and a condensed water outlet, the evaporator comprises a dehumidizer channel capable of containing a dehumidizer solution, and the dilute solution inlet and the concentrated solution outlet are connected to the moisture absorption unit; the dilute solution inlet is used for receiving the diluted desiccant solution, the concentrated solution outlet is used for leading the evaporated and concentrated desiccant solution to the moisture absorption unit, the compressor comprises a compressor inlet and a compressor outlet, the compressor inlet is connected to the steam outlet, and the compressor outlet is connected to the steam inlet.

The invention relates to the technical field of food processing, in particular to a beverage concentrated solution extraction device and an extraction method. An air inlet of a compressor is communicated with a secondary steam outlet of a separator, and the compressor is used for sucking and compressing secondary steam; an air outlet of the compressor communicates with an inlet of the shell-and-tube heat exchanger shell layer, and the compressor is used for feeding compressed and heated steam into the shell-and-tube heat exchanger shell layer as a heating medium; a vapor-liquid mixture outlet of the shell-and-tube heat exchanger is communicated with an inlet of the separator, and a concentrated solution outlet of the separator is communicated with the storage tank through a pipeline; a condensate water outlet of the shell-and-tube heat exchanger is communicated with a condensate water tank through a pipeline via a flow meter; a suction port of the water ring vacuum pump is communicated with a non-condensable gas exhaust port of the shell-and-tube heat exchanger tube layer through the steam water ring vacuum pump; a suction port of the steam water ring vacuum pump is communicated with the condensate water tank and the storage tank and used for forming negative pressure in the condensate water tank and the storage tank. According to the technical scheme, boiler steam and a large amount of cooling water are not used, environment protection and energy conservation are achieved, and operation is convenient; the problems of high investment cost, large occupied area, complex operation and maintenance and the like of large industrial equipment in the prior art are solved.

A distillation device may comprise a source fluid input and an evaporator in fluid communication therewith. The device may further comprise a compressor having an impeller coupled to a motor, the compressor having a low pressure inlet for vapor from the evaporator and a high pressure outlet for compressed vapor. The device may further comprise at least one temperature sensor configured to monitor temperature of vapor in the inlet and a condenser in heat transfer relationship with exterior surfaces of the evaporator and in fluid communication with the compressor outlet. The device may further comprise a controller configured to govern rotation speed of the impeller with an impeller motor command based on a calibrated motor speed for the distillation device. The controller may be configured to determine an adjusted motor speed for a next use of the device and overwrite the calibrated motor speed with the adjusted motor speed.

The invention relates to a compressed air distribution device and a tail end wastewater bypass flue evaporation system. The compressed air distribution device comprises a spray gun group, a control valve group and an air path distributor, one end of the air path distributor is connected with compressed air input equipment, a flow guide plate and a pressure balance cavity are arranged in the air path distributor, the flow guide plate is used for conducting angle optimization on input compressed air, and the pressure balance cavity is used for distributing the compressed air optimized by the flow guide plate into all the cavities in a balanced mode. The hoses are connected with the spray guns in the spray gun group in a one-to-one correspondence manner; one end of the waterway distributor is connected with a desulfurization wastewater pipeline and is connected with the corresponding spray gun through a pipeline; and the control valve group is distributed in a hose connected with the gas path distributor and a pipeline connected with the water path distributor. Compared with the prior art, the system has the advantages that the stability is improved, the energy consumption is reduced, and equipment protection and automatic control are realized.

The utility model discloses a two-stage falling film MVR (Mechanical Vapor Recompression) evaporation device, which comprises a falling film heater comprising a first accommodating cavity comprising a heating area and a liquid storage area, the heating area is positioned in the middle of the first accommodating cavity, and the liquid storage area is positioned at the bottom of the first accommodating cavity; the heat exchanger is arranged in the heating area; the partition piece is arranged in the liquid storage area, one end of the partition piece and the heat exchanger are arranged at intervals, the other end of the partition piece is connected with the bottom of the liquid storage area so that the liquid storage area can be divided into a first liquid storage cavity and a second liquid storage cavity, the lower end of the first liquid storage cavity is used for communicating with an external first material inlet, and the lower end of the second liquid storage cavity is used for communicating with an external discharging pump; two ends of the first circulating pump are respectively communicated with the first liquid storage cavity and the heat exchanger; the two ends of the second circulating pump communicate with the second liquid storage cavity and the heat exchanger correspondingly. According to the utility model, the heat exchange area of the falling-film evaporator can be effectively reduced while the consumption of live steam is saved, and the purposes of reducing the volume of the falling-film heater and reducing the occupied area are achieved while the operation cost is reduced.

Methods and systems for separating components are disclosed. A process liquid stream is provided that contains a first component and a second component. The process liquid stream is cooled to near a temperature at which the second component forms a solid. The process liquid stream is expanded into a vessel such that the first component and a first portion of the second component vaporize to form a process vapor stream and a second portion of the second component forms a solid to form a solid product stream. The process vapor stream and the solid product stream are passed out of the vessel.

Provided is a method for concentrating a sodium hydroxide aqueous solution including: in a stepwise concentration process of sodium hydroxide aqueous solution, including a concentration part in which a plurality of evaporators from a first evaporator to a nth evaporator are connected in series, adding a sodium hydroxide aqueous solution to the first evaporator and then performing evaporation to obtain a first sodium hydroxide concentrate, and recovering steam evaporated from the sodium hydroxide aqueous solution; and adding the first sodium hydroxide concentrate to an evaporator at a subsequent stage, and adding the steam recovered from the first evaporator to a mechanical vapor recompression device to perform compression, wherein the nth evaporator uses the compressed steam as a heat source.

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 utility model relates to the technical field of evaporators, and discloses a steam washing device for an MVR evaporator, which comprises a liquid distribution plate, the liquid distribution plate is arranged above tubes in the MVR evaporator, liquid distribution holes are arranged on the liquid distribution plate, the liquid distribution holes correspond to the tubes on a pore plate in position, a washing pipe is arranged above the liquid distribution plate, and the washing pipe is communicated with the liquid distribution plate. And the flushing pipe is used for conveying steam to the position above the liquid distribution plate. According to the scheme, drinking water is shunted through the liquid distribution plate and the liquid distribution holes, and the shunted drinking water enters the corresponding tube nest, so that the drinking water is uniformly distributed in the tube nest, and the cleaning effect of residual liquid medicine in the tube nest is better; residual liquid medicine in the tube nests is further cleaned through steam, and the cleaning effect of the tube nests is guaranteed.

The utility model relates to an aluminum oxide mother liquor evaporation system capable of reducing multi-effect evaporation steam consumption, which comprises a plurality of evaporators which are sequentially arranged, a steam jet mixer, a steam outlet pipe and a steam outlet pipe, the steam jet mixer is provided with a steam inlet, a steam suction port and a mixed steam outlet connected with the first-effect evaporator, the aluminum oxide mother liquor evaporation system further comprises a steam supplementing pipeline connected between the steam suction port and the last-effect secondary steam pipeline, and a steam compressor is arranged on the steam supplementing pipeline. Due to the fact that the last-effect secondary steam contains more latent heat, by means of the scheme, the last-effect secondary steam can be used for replacing part of new steam, the latent heat of the last-effect secondary steam is effectively recycled, and energy consumption of an evaporation system is reduced; and meanwhile, the amount of last-effect secondary steam entering the water cooler can be reduced, so that the load of a circulating water system of the water cooler is reduced, and the operation cost of the circulating water system is reduced.

The two-stage MVR evaporator comprises a shell body, an inner container body is welded to the inner wall of one side of the shell body, a top cover is installed on the outer wall of the top of the shell body through bolts, and a condensation shell is installed on the inner wall of the top of the top cover through bolts; the outer wall of the bottom of the condensation shell is provided with a plurality of connecting frames through bolts, the outer walls of the bottoms of the connecting frames are provided with a liquid collecting shell through bolts, the liquid collecting shell is located below the condensation shell, and a guide pipe is welded to the outer wall of the bottom of the liquid collecting shell and penetrates out of the shell body. An exhaust pipe is welded to the outer wall of one side of the shell body and located above the guide pipe. Through the arrangement of the condensing shell, the connecting frame and the liquid collecting shell, rising steam can be condensed and collected in the using process, the situation that the steam falls into the evaporator again can be reduced in the using process, and the evaporation quality can be improved.

The invention relates to the technical field of MVR (mechanical vapor recompression) evaporators, in particular to an anti-scaling enhanced heat transfer system of an MVR evaporator, which comprises an evaporator, a separator in pipeline communication with the evaporator and a compressor in pipeline communication with the separator, and the compressor and the output end of the evaporator are in pipeline communication with the evaporator; wherein the evaporator comprises a shell, an upper plate and a lower plate, the upper plate and the lower plate are rotationally connected into the shell, the multiple heat exchange pipes are connected in an overall rotating mode, steam is input into the shell through the compressor, an input port is formed in one side of the shell, and therefore the heat exchange pipes can be installed in a traditional fixed heat exchange pipe installation mode, and the heat exchange pipes can be installed more conveniently. Compared with the prior art, the heating uniformity of the heat exchange tube is general, and the heating uniformity of the heat exchange tube can be improved by adopting the mode that the heat exchange tube rotates circumferentially as a whole in the scheme, so that the heat transfer effect is enhanced; in addition, the arranged cleaning assembly can be used for flushing the heat exchange pipe, and therefore the durability and reliability of the whole device are improved.

The invention provides an MVR distillation and concentration device for pharmaceutical production, and relates to the field of pharmaceutical concentration. The MVR distillation and concentration device for pharmaceutical production comprises a concentration table, an evaporation tank is arranged on the inner side of the concentration table and used for evaporating and converting liquid medicine into gas, the surface of the evaporation tank is communicated with a steam cylinder and used for storing steam, and a compression mechanism is arranged on the inner side of the steam cylinder and used for compressing the steam. According to the MVR distillation and concentration device for pharmaceutical production, liquid medicine is evaporated into the inner side of the steam cylinder through the evaporation tank, steam on the inner side of the steam cylinder is compressed through the compression mechanism, so that the steam forms small water drops to be adhered to the inner wall of the compression bin, and compressed substances which still keep gas are cooled and discharged through the output assembly; the liquid substance is circularly evaporated, so that the liquid medicine is concentrated and separated, the concentration effect is achieved by extruding the steam to separate the liquid medicine, and the problems that a large amount of heat and steam can be released and consumed by direct distillation during liquid medicine concentration, and the cooling time and process are relatively tedious are solved.

The utility model discloses an MVR (Mechanical Vapor Recompression) evaporation wastewater treatment device, and particularly relates to the field of wastewater treatment, the MVR evaporation wastewater treatment device comprises an MVR evaporator shell, a driving motor is fixedly mounted at the top end of the MVR evaporator shell, and an output shaft of the driving motor penetrates through the side wall of the top end of the MVR evaporator shell and is fixedly connected with a first bevel gear arranged in the MVR evaporator shell; a first bevel gear is arranged on the inner side wall of the MVR evaporator shell, a second bevel gear is arranged at the lower end of the first bevel gear in a meshed mode, the second bevel gear is fixedly installed on a stirring shaft, a stirring assembly and a defoaming plate are arranged on the stirring shaft, a water guide ring is arranged on the inner side wall of the MVR evaporator shell, and a plurality of spray heads are evenly arranged on the water guide ring at intervals. When the stirring rod rotates, the gear can be driven to rotate under the action of the annular tooth groove, so that the stirring rod drives the stirring blades to rotate, the stirring efficiency of the stirring assembly is improved, wastewater in the MVR evaporator is uniformly heated, and the wastewater is fully heated and evaporated.

The invention relates to an MVR (mechanical vapor recompression) evaporation and concentration system for a methanol-containing material, which comprises a material tank for storing the material, a feeding pump for conveying the material, a material evaporation system for evaporating and concentrating the material, and a water heater for heating water to generate steam by taking secondary steam generated by the material evaporation system as a heat source, the steam compressor, the live steam source, the tail gas condenser and the vacuum pump are used for heating water, and the steam compressor, the live steam source, the tail gas condenser and the vacuum pump are used for pressurizing and heating steam produced by the water heater. Pure steam enters the steam compressor to be compressed into high-pressure and high-temperature compressed steam, methanol-containing materials are evaporated and concentrated through the compressed steam, live steam is only used as a supplementary heat source, the use amount of the live steam can be effectively reduced, the cost is saved, meanwhile, the methanol explosion risk is also reduced, and the energy consumption is reduced. Corrosion of methanol to a mechanical structure of the compressor is reduced, and normal and stable operation of a system is guaranteed.

The invention discloses a falling film demisting gas washing device which comprises a steam treatment part and a gas washing part, the folded plate demister comprises a shell and a #-shaped distribution plate, the shell comprises a first inner cavity, one end of the first inner cavity is communicated with the steam treatment part, and the other end of the first inner cavity is used for being communicated with an external steam compressor; the defoaming part comprises a plurality of baffle plates and a plurality of trapping hooks, each baffle plate comprises a plurality of peak parts, every two adjacent peak parts face the same direction in the second direction, every two adjacent peak parts face different directions in the first direction, each trapping hook comprises a connecting part and a hook part which are connected, and the hook parts and the corresponding peak parts are arranged at intervals in the second direction; the projections of the hook parts and the corresponding peak parts coincide; wherein external secondary steam can sequentially flow through the external falling film evaporator, the steam treatment part, the #-shaped distribution plate, the defoaming part and the external steam compressor. According to the steam compressor, entrainment carried in secondary steam can be reduced, and the influence on the efficiency of the steam compressor and the dynamic balance of the impeller is reduced.

The utility model provides an energy-saving caprolactam production device which comprises an extraction tower, the extraction tower is connected with a buffer tank through a pipeline, one side of the buffer tank is connected with a benzene-hexyl buffer tank through a pipeline, the benzene-hexyl buffer tank is connected with a reverse extraction tower through a pipeline, the reverse extraction tower is connected with a heat exchanger through a pipeline, and the heat exchanger is connected with a heat exchanger through a pipeline. The heat exchanger is connected with a heater through a pipeline, the heater is respectively connected with a first already-water preheater and a debenzolization tower through pipelines, and the debenzolization tower is respectively connected with an already-water buffer tank and a condensate tank through pipelines. According to the caprolactam energy-saving production device provided by the utility model, the use amount of low-pressure steam (t / h) can be saved by recovering the heat of the steam condensate for preheating a hexane solution, and the use amount of the low-pressure steam (t / h) can be saved by repeatedly utilizing the MVR evaporation secondary steam condensate for heat exchange and preheating the MVR evaporation secondary steam condensate with the residual liquid of the hexane extraction tower.

The utility model discloses a safe, efficient and energy-saving ammonium nitrate solution production system which comprises an efficient tubular reactor, a reactor flash tank and a reflux mixer, the efficient tubular reactor is communicated with the reactor flash tank and the reflux mixer, and an ammonia gas pipe and a nitric acid pipe are connected to the efficient tubular reactor. An adjusting loop is connected among the ammonia gas pipe, the nitric acid pipe and the efficient tubular reactor, the reflux mixer comprises a neutralization washing tower, and the reactor flash tank is further connected with a falling film primary evaporator. Compared with the prior art, the system provided by the utility model has the advantage that the ammonium nitrate solution can be prepared safely, efficiently and in an energy-saving manner by utilizing the pressurized tubular reactor and the MVR evaporator.