32results about "Evaporation with vapour compression" patented technology

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 condensate water collection, and discloses a condensate water collection device of an MVR evaporator for electrolytic aluminum ash treatment, which comprises a collection box, a drain pipe is mounted on the surface of the collection box, a filtering inclined plate is fixedly connected to the inner wall of the collection box, and a mounting shell is fixedly connected to the surface of the collection box. A hydraulic electric push rod is mounted in the mounting shell, the output end of the hydraulic electric push rod is fixedly connected with a right-angle scraping plate, and a limiting hole is formed in the surface of the right-angle scraping plate. By arranging the filtering inclined plate and the scraping plate, the clamping plate is pulled out from the interior of the filtering inclined plate, the hydraulic electric push rod is started, the output end of the hydraulic electric push rod drives the right-angle scraping plate to move on the surface of the filtering inclined plate, and dust and impurities on the surface of the filtering inclined plate are scraped to the right end of the partition plate to be collected; the situation that in the process of collecting the condensate water for a long time, the surface of the filtering inclined plate is blocked, and consequently the condensate water cannot be collected and filtered is avoided.

The utility model discloses a kind of separation and purification system of secondary steam in MVR evaporation system, including cylinder, cylinder is sequentially distributed with cyclone separation chamber, purification settling chamber and silk screen demisting chamber from bottom to top, cyclone separation chamber middle part has spray washing chamber, spray washing chamber bottom is connected with cyclone separation chamber, spray washing chamber top is connected with purification settling chamber, cyclone separation chamber is connected with steam inlet pipe, silk screen demisting chamber is connected with steam outlet pipe, cyclone separation chamber has collection tank, collection tank is used to collect the droplet of secondary steam being thrown to cylinder wall, spray washing chamber has spray pipe, spray pipe is used to spray atomized washing liquid contact secondary steam absorption volatile component contained;By cyclone separation, countercurrent spray washing, sedimentation and silk screen demisting four-stage treatment process, liquid droplet, mist droplet and volatile component in secondary steam are purified gradually, greatly improve the purification quality of secondary steam, effectively solve the problem of poor effect of traditional purification mode.

The present application relates to the technical field of natural soda production, and in particular to a system and method for preparing heavy soda ash by using cogeneration coupled with wind power supply. The system for preparing heavy soda ash by using cogeneration coupled with wind power supply comprises a coal-fired cogeneration device, a wind power generation device and a heavy soda ash production system. The coal-fired cogeneration device is used to provide steam and electric energy. The wind power generation device is used to provide electric energy. The heavy soda ash production system uses the steam and electric energy provided by the coal-fired cogeneration device and the electric energy provided by the wind power generation device to produce heavy soda ash. The present application can solve the technical problems of large energy consumption and large carbon emissions in the existing natural soda production.

This utility model discloses an MVR evaporator crystallizer, including a support, a filtration mechanism, and a preheating mechanism. The support has the evaporator crystallization mechanism at its front end and a centrifugal pump at its lower end. The filtration mechanism includes a filter box, a spiral blade shaft, a filter cylinder, and a collection box. The filter box is located at the rear of the lower end of the support, and the collection box is located at the right end of the filter box. An inclined filter cylinder is fixedly connected to the upper left side wall of the filter box. The right end of the filter cylinder is open and connected to the collection box. A connection port is located at the upper left end of the filter cylinder. A spiral blade shaft is rotatably connected inside the filter cylinder, and the bolts on the spiral blade shaft contact the inner wall of the filter cylinder. The inlet of the centrifugal pump is connected to the lower end of the filter box via a connecting pipe. This MVR evaporator crystallizer reduces maintenance frequency through pretreatment filtration and reduces steam consumption through preheating.

The application relates to an MVR system based on a heat shock flash evaporation loop lift heat exchange, which comprises a lift heat exchanger, a vapor-liquid separator, a preheater, a heat shock heater and a throttling component, the preheater is communicated with the heat shock heater, the condensate inlet of the preheater is communicated with the condensate outlet of the lift heat exchanger; the material outlet of the heat shock heater is communicated with the feed inlet of the lift heat exchanger through the throttling component; the lift heat exchanger is communicated with the vapor-liquid separator, so that the secondary steam in the lift heat exchanger enters the vapor-liquid separator, the gaseous phase after separation is compressed and introduced into the lift heat exchanger, and is used as a heat source of the lift heat exchanger; the concentrated liquid flowing out of the vapor-liquid separator and the lift heat exchanger is extracted when the concentration detection is qualified, and is re-injected into the heat shock heater after being pressurized for reuse when the concentration detection is unqualified. The application can form a stable circular flow without relying on a large temperature difference, matches the narrow temperature difference heat transfer characteristics of the MVR system, and greatly reduces the high-grade energy consumption of the lift heat exchanger.

A method for concentrating an aqueous sodium hydroxide solution is provided, comprising: in a stepwise concentration process of an aqueous sodium hydroxide solution including a concentration section comprising a first evaporator to an nth evaporator connected in series, adding the aqueous sodium hydroxide solution to the first evaporator, then evaporating it to obtain a first sodium hydroxide concentrate, and recovering the vapor evaporated from the aqueous sodium hydroxide solution; and adding the first sodium hydroxide concentrate to a subsequent evaporator, and adding the vapor recovered from the first evaporator to a mechanical vapor recompression device for compression, wherein the nth evaporator uses the compressed vapor as a heat source.

The present application belongs to the technical field of environmental protection, and relates to a self-heat cycle evaporation device based on a heat pump and a self-heat cycle evaporation method based on a heat pump. The device comprises a multi-effect evaporation unit and a heat pump unit. The heat pump unit comprises a heat pump evaporator, a compressor, an integrated steam generator and a throttle valve which are connected in series through heat exchange working medium pipelines to form a heat exchange loop. The heat pump evaporator is provided with a heat pump evaporator steam inlet and a heat pump evaporator condensate outlet. The integrated steam generator is provided with a fresh water inlet and a fresh steam outlet. The multi-effect evaporation unit is provided with a material feeding end, a material discharging end, a steam feeding end, a steam discharging end and a plurality of multi-effect evaporators which are connected in series along the steam flow direction. The steam discharging end of the multi-effect evaporation unit is connected to the heat pump evaporator steam inlet, and the fresh steam outlet is connected to the steam feeding end of the multi-effect evaporation unit. The present application converts the energy of multi-effect steam into a one-effect heating heat source, thereby saving energy. The method is simple to implement, has low investment cost, has remarkable energy-saving effect and has promotional value.

This utility model relates to an MVR evaporation and concentration system for methanol-containing materials, including a material tank for storing materials, a feed pump for conveying materials, a material evaporation system for evaporating and concentrating materials, a water heater that uses secondary steam generated by the material evaporation system as a heat source to heat water and generate steam, a steam compressor for pressurizing and heating the steam generated by the water heater, a live steam source, a tail gas condenser, and a vacuum pump. This utility model uses the methanol-containing secondary steam generated during the evaporation process of methanol-containing materials as a heat source to heat water and generate pure steam. The pure steam enters the steam compressor and is compressed into high-pressure and high-temperature compressed steam. The compressed steam is used to evaporate and concentrate the methanol-containing materials. Live steam is only used as a supplementary heat source, which can effectively reduce the amount of live steam used, save costs, reduce the risk of methanol explosion, reduce the corrosion of the compressor's mechanical structure by methanol, and ensure the normal and stable operation of the system.

This utility model discloses a pre-filter slag removal device for an MVR evaporator, belonging to the technical field of filtration and slag removal equipment. It includes a slag removal box and a movable plate. A first filter screen and a fixed shell are fixedly connected to opposite inner walls of the slag removal box. The end face of the first filter screen is fixed to the surface of the fixed shell. A rectangular opening is provided at the bottom of the fixed shell. A collection shell is movably connected inside the fixed shell. A second filter screen is provided at the bottom of the collection shell. An opening is provided on the surface of the slag removal box. Its beneficial effect is that by setting the first filter screen and the collection shell, wastewater is filtered through the first filter screen. A motor drives a threaded column to rotate, causing the threaded column to rotate inside the threaded hole. This causes the movable plate to move on the surface of the threaded column, and the movable plate drives a cleaning brush to move on the surface of the first filter screen. The cleaning brush collects the filter slag into the collection shell, facilitating the collection of the filter slag.

A method and system for distilling alcohol in an alcohol production process utilizes mechanical vapor recompression (MVR), by way of an MVR device, such as to improve vacuum distillation column capacity. The MVR device is used as a way to increase vapor pressure / density and reduce vapor volume providing for increased volumetric flowrate and thereby increasing the capacity of a distillation system. In particular, the MVR takes a low value waste heat from stillage evaporators and compresses it to a higher temperature / pressure to create useful energy. By raising the pressure in the beer column with an MVR device, the vapor density increases, vapor volume decreases, and vapor velocity increases so that more vapor can be fed to and through the beer column. That is, additional mass flow can be added to the stillage evaporators and beer column to return the overall vapor velocity at the beer column to the original velocity constraint point. As such, the throughput of the beer column can be increased until it reaches its original velocity design constraint.

The application relates to the technical field of heating devices, in particular to an MVR evaporation and multi-stage countercurrent heat exchange device for low-temperature crystallization of basic copper carbonate, which comprises an evaporation tank for solution evaporation and a heat exchange tank for heat exchange, a circulating assembly is arranged outside the evaporation tank, the circulating assembly comprises a flow guide pipe arranged outside the evaporation tank and used for conveying steam, and a compressor is arranged outside the flow guide pipe. Through the arrangement of the circulating assembly, the steam gradually flows upwards in the heat exchange tank, the basic copper carbonate solution flows downwards in the heat exchange tank and contacts the steam, the steam can heat the basic copper carbonate solution, the initial temperature of the basic copper carbonate solution can be increased to a certain extent, the evaporation efficiency of the basic copper carbonate solution can be increased to a certain extent, the heat utilization efficiency can be effectively improved through full utilization of the heat, and the additional loss of the heat can be reduced.

A method and system for distilling alcohol in an alcohol production process utilizes mechanical vapor recompression (MVR), by way of an MVR device, such as to improve vacuum distillation column capacity. The MVR device is used as a way to increase vapor pressure / density and reduce vapor volume providing for increased volumetric flowrate and thereby increasing the capacity of a distillation system. In particular, the MVR takes a low value waste heat from stillage evaporators and compresses it to a higher temperature / pressure to create useful energy. By raising the pressure in the beer column with an MVR device, the vapor density increases, vapor volume decreases, and vapor velocity increases so that more vapor can be fed to and through the beer column. That is, additional mass flow can be added to the stillage evaporators and beer column to return the overall vapor velocity at the beer column to the original velocity constraint point. As such, the throughput of the beer column can be increased until it reaches its original velocity design constraint.

This invention discloses an evaporation system designed to address the low thermal efficiency of existing sodium sarcosinate evaporation systems. The system comprises a three-effect evaporator connected in series via a connecting pipe and a steam compressor. The outlet of each evaporator is connected to its inlet. The evaporators use externally supplied steam as their heat source. The steam compressor's outlet connects to the first and third-effect evaporators, the first-effect evaporator's outlet connects to the second-effect evaporator, and the outlets of the second and third-effect evaporators connect to the steam compressor. The use of a three-effect, self-circulating evaporator reduces investment and floor space requirements. The steam compressor's inlet connects to the second and third-effect evaporators, while its outlet connects to the first and third-effect evaporators, achieving efficient heat entropy distribution and improving overall efficiency.

This utility model discloses an MVR circulating evaporator, comprising a first cylinder, an evaporation cylinder, a second cylinder, and a compressor. An inlet pipe is fixedly connected to the first cylinder, a feed pipe is fixedly connected to the evaporation cylinder, and a connecting pipe is fixedly connected to the evaporation cylinder. A discharge pipe is fixedly connected to the second cylinder. A first gas supply pipe is fixedly connected to the input end of the compressor, and a second gas supply pipe is fixedly connected to the output end of the compressor. A first circular tube is fixedly connected to the outer surface of the evaporation cylinder, and a second circular tube is fixedly connected to the outer surface of the second cylinder. By using bolts, nuts, and positioning blocks, this design segments the circular tubes, allowing the positioning blocks, connecting rings, and filter plates to be removed from the first and second circular tubes respectively. This enables regular cleaning and maintenance of the filter plates, ensuring both effective filtration and efficient liquid flow.

The utility model relates to a kind of processing device for removing chlorine ion in copper sulfate solution in circulation, the processing device includes the first reaction kettle, first solid-liquid separation device, first evaporator, crystallization device and first centrifugal device connected in order along material conveying direction;The processing device also includes the second reaction kettle, second solid-liquid separation device, second evaporator and second centrifugal device connected in order along material conveying direction;The first solid-liquid separation device solid-phase outlet of first solid-liquid separation device is connected with second reaction kettle, and the first solid-liquid separation device liquid-phase outlet of first solid-liquid separation device is connected with first evaporator;Second solid-liquid separation device liquid-phase outlet of second solid-liquid separation device is connected with second evaporator;Processing device further includes drying device connected with the second solid-liquid separation device second solid-liquid separation device solid-phase outlet. That is, the utility model not only can remove chlorine ion in copper sulfate solution, but also can recycle copper compound.

A carbon dioxide recovery system is equipped with: a first distillation column for heating an absorption liquid that has absorbed carbon dioxide to release carbon dioxide from the absorption liquid; a first reboiler for exchanging heat between the absorption liquid extracted from the first distillation column and steam; a second reboiler for exchanging heat between the absorption liquid extracted from the first distillation column and a fluid different from both an effluent gas from the first distillation column and the steam; and a first compressor for compressing the fluid before the fluid flows into the second reboiler.

To reduce required power of a compressor.SOLUTION: A distillation method comprises: a supply step of supplying a liquid to a batch-type distillation column; a pressurizing and temperature-raising step of pressurizing and temperature-raising a fluid for heating the liquid by means of a compressor, and supplying the fluid to a reboiler; a heating step of, in the reboiler, performing heat exchange between the liquid supplied from the distillation column and the pressurized and temperature-raised fluid to heat the liquid and condense the fluid; a condensation step of sending column top vapor of the distillation column to a condenser by heating in the heating step, and condensing the vapor by the heat exchange to obtain a condensate; a distillate extraction step of extracting the condensate; and a bottom product extraction step of extracting a residual liquid in the distillation column. The method further comprises a pressure adjustment step of adjusting a pressure of the distillation column so that the liquid can be distilled by heating with a heat pump operating in a smaller temperature elevation range in the pressurizing and temperature-raising step.SELECTED DRAWING: Figure 3

This utility model relates to the field of evaporator technology, and in particular to an anti-scaling plate-type MVR evaporator, which overcomes the shortcomings of existing technologies. It includes a base, a body, a mounting frame, and condenser plates. The base has a boss, the body is mounted on the boss, and a pipe is connected to the top of the body. A through mounting hole is opened in the middle of the body, and the mounting frame is placed in the mounting hole. Several condenser plates are evenly spaced between the side walls of the mounting frame. Each condenser plate has a movable shaft at its bottom that moves synchronously with it. The movable shaft slides between the inner walls of the mounting frame, and a gear is slidably mounted inside the mounting frame along a direction perpendicular to the length of the movable shaft. The gear can mesh with each movable shaft for transmission. A positioning element is also elastically mounted on one side of the bottom of the movable shaft inside the mounting frame. Compared with existing technologies, this utility model can effectively solve the problems of stubborn scaling and rapid replacement of condenser plates.

Disclosed is a distillation apparatus having a various heat exchange methods added to a process of producing dimethyl carbonate using reactive distillation and pressure-swing distillation. According to the disclosure, internal and external heat integration between a high-pressure and a low-pressure distillation column, which constitute pressure-swing distillation columns, is applied to a dimethyl carbonate production process, and a vapor recompression heat pump configured to compress and heat a fluid and transfer the heat to a fluid having a relatively low temperature is applied to achieve additional heat exchange with a reactive distillation column, thereby improving the dimethyl carbonate production process in terms of energy and economic efficiency by reducing energy consumption while reducing investment and operating costs of a reboiler and a condenser, which are required in a conventional process.

A distillation method includes a supplying step of supplying a batch type distillation column with a liquid that is a process fluid; a pressure-temperature increasing step of increasing pressure and temperature of a fluid, used to heat the liquid, with a compressor and supplying the fluid to a reboiler; a heating step of exchanging heat in the reboiler between the liquid, which has been supplied to the distillation column, and the fluid, which has been increased in pressure and temperature, to heat the liquid and acquire overhead vapor and to condense the fluid; a condensing step of delivering the overhead vapor heated in the heating step to a condenser and condensing the overhead vapor into a condensate through heat exchange; a distillate removing step that removes the condensate; and a discharged liquid removing step that removes residual liquid from the distillation column. A pressure-regulating step regulates pressure of the distillation column to distill the liquid with heat generated by a heat pump operated over a narrower temperature rising range in the pressure-temperature increasing step.

This utility model relates to a split-type MVR evaporation device, including a wastewater evaporation system. The wastewater in the first separation chamber evaporates after exchanging heat with a first heat exchanger via a first circulation pipe. The evaporated wastewater vapor in the first separation chamber liquefies after exchanging heat with a second heat exchanger, and the liquefied distilled water is output. The clean water evaporation system includes a second separation chamber for evaporating clean water. The clean water in the second separation chamber evaporates after exchanging heat with a second heat exchanger via a second circulation pipe. The evaporated clean water vapor in the second separation chamber is pressurized by a compressor and then liquefies after exchanging heat with the first heat exchanger. The liquefied clean water is then returned to the second circulation pipe. By setting up the clean water evaporation system, the wastewater vapor is isolated from the compressor, avoiding the influence of wastewater quality on the entire evaporation system and improving the system's stability.

The utility model relates to a kind of polyaluminium chloride MVR drum drying system, including drum dryer, condensate tank, condensate pump, column tube heat exchanger, separator, vacuum pump, circulating pump and steam compressor, high-temperature waste gas and condensate will be generated when polyaluminium chloride solution is dried by drum dryer, by recycling high-temperature waste gas and condensate, high-temperature waste gas is passed into the shell side of column tube heat exchanger, condensate is passed into the tube side of column tube heat exchanger, the heat in high-temperature waste gas heats condensate, so that condensate generates saturated steam again, saturated steam enters steam compressor, saturated steam is pressurized and heated after using steam compressor to compress it, and then polyaluminium chloride solution is dried again into drum dryer, realize the recycling of heat in high-temperature waste gas and condensate, after system operation is stable, live steam is only used as supplement gas, can effectively reduce the use amount of live steam, reduce the production cost of solid polyaluminium chloride.

Systems, methods, and apparatuses for generating a waste heat recovery system having a flash vessel structure and a compressor train fluidly coupled to the flash vessel structure are provided. A request for the system is received that identifies parameters including a first set associated with a source of waste heat received by the system and a second set associated with an output of energy provided by the system, with some parameters obtained from a physical location and / or the source of waste heat. Design criteria are obtained based on the request, each associated with a threshold limit of the system at the physical location. The system is configured by discretizing across one or more components based on the first and second set of parameters, the design criteria, and the flash vessel structure. A graphical representation of the system is communicated including an indication of utilizing the system.

This invention discloses a low-temperature waste heat-driven dilute acid concentration device, relating to the technical field of waste heat recovery and concentration. It includes a preheating box with preheating pipes inside, and temporary storage tanks at both ends. This invention preheats the dilute acid using a grid-plate heat exchange structure within the preheating box, and then uses mechanical compression in a pressurized tank to increase the temperature and grade of steam for secondary heating. This achieves efficient cascade utilization of low-grade industrial waste heat, significantly reducing the overall energy consumption of the concentration process. Furthermore, the pressurized component compresses the steam, significantly increasing the temperature threshold of the heated dilute acid and effectively improving concentration efficiency. The pressurized component is equipped with a linkage shaft and bevel gear transmission structure, allowing adjustment of the eccentricity of the support shaft, thereby flexibly changing the piston plate stroke and compression intensity. This enables precise matching of heating power according to the initial concentration of the dilute acid and the concentration target, avoiding energy waste caused by overheating.

The utility model belongs to lithium concentration technical field, concretely relates to a combined form evaporator system. Including series' MVR falling film concentration unit, primary forced circulation evaporation concentration unit, secondary forced circulation evaporation concentration unit and vacuum unit, the material outlet of MVR falling film concentration unit is connected to primary forced circulation evaporation concentration unit through falling film discharge pump, then is connected to secondary forced circulation evaporation concentration unit through material transfer pump, and material carries on concentration evaporation in turn through MVR falling film concentration unit, primary forced circulation evaporation concentration unit and secondary forced circulation evaporation concentration unit, vacuum unit, including condenser and vacuum pump group. The utility model discloses through the collaborative design of MVR falling film concentration unit and two stage forced circulation evaporation unit, realizes the efficient stage -by -stage concentration of lithium salt, also significantly reduces energy consumption and operating cost.