54results about "Multiple-effect evaporation" patented technology

A cross-feed method for evaporating diluted sugar juice in beet sugar production includes the following steps: The purified diluted sugar juice is fed into a four-effect evaporator for evaporation and concentration; the sugar juice output from the four-effect evaporator is fed into a first-effect evaporator for further evaporation and concentration, using exhaust steam from the power plant to heat the first-effect evaporator, with all secondary steam from the first-effect evaporator supplied as a heat source to the second-effect evaporator; the sugar juice output from the first-effect evaporator is fed into the second-effect evaporator for further evaporation and concentration, with all secondary steam from the second-effect evaporator supplied as a heat source to the third-effect evaporator; the sugar juice output from the second-effect evaporator is fed into the third-effect evaporator for further evaporation and concentration, with 60% of the secondary steam from the third-effect evaporator used as a heat source to the fourth-effect evaporator; the sugar juice output from the third-effect evaporator is fed into a fifth-effect evaporator for further evaporation and concentration, with 80% of the secondary steam from the fourth-effect evaporator used as a heat source to the fifth-effect evaporator. This invention offers high production efficiency, higher steam heat utilization, and good production stability.

This invention provides a dual-I-effect heating chamber system for an evaporator, comprising a separation chamber, two heating circulation lines, a water tank, and a downstream material conveying pipe. The separation chamber includes a feed end, a discharge end, and a steam outlet. The feed end is connected to the upstream material input pipe. Both heating circulation lines are connected to the discharge end and the steam outlet, and are connected in parallel. Each heating circulation line can independently circulate both material and gaseous substances. Operating valves are installed on the heating circulation lines to control their operation. The water tank is connected to both heating circulation lines to circulate gaseous substances. The downstream material conveying pipe is also connected to both heating circulation lines. This invention enables normal cleaning of the heating circulation lines without interrupting production.

The application discloses a method and system for preparing ammonium bifluoride from hydrofluoric acid waste liquid, which comprises the following steps: (1) adding the hydrofluoric acid waste liquid into an electrolytic cell, transporting the electrolytic cell to a first reaction kettle after electrodepositing treatment, adding silicon dioxide, then stirring and reacting, and returning the generated silicon tetrafluoride and hydrofluoric acid into a spray tower to react and then return to the first reaction kettle, and then adding ammonia water to perform neutralization reaction; (2) filtering the solid-liquid mixture I, evaporating and drying the obtained filtrate I to obtain an ammonium nitrate product, and returning the obtained filter cake I to a second reaction kettle, adding ammonia water to adjust the pH value, and then stirring and reacting; (3) filtering the solid-liquid mixture II, returning the obtained filter cake II to the first reaction kettle for reuse, transporting the obtained filtrate II to a reactor, adding hydrofluoric acid to perform reaction, and then performing evaporation and drying treatment to obtain an ammonium bifluoride product. The method is simple in process, low in energy consumption, convenient to operate and convenient for industrialized production and application.

The present application relates to water pollution control and treatment technical field, specifically to a kind of evaporation treatment equipment suitable for ammonium chloride high-salt wastewater, including evaporator, and evaporator includes shell and multiple heat exchange parts in shell.The heat exchange part includes partition and multiple heat exchange pipes, and the heat exchange pipe includes upper pipe, middle pipe and lower pipe which are sequentially arranged in vertical direction, and the upper pipe is installed on the partition, and the middle pipe is respectively connected with the upper pipe and the lower pipe ball hinge.A kind of evaporation treatment equipment suitable for ammonium chloride high-salt wastewater of the present application utilizes the length change of middle pipe of heat exchange pipe in vertical direction after rotation, dynamically compensates the problem of empty pipe caused by liquid level drop, prolongs the effective heat exchange time of upper pipe, shortens the empty pipe dry burning time, avoids the occurrence of large-area empty pipe dry burning situation, reduces the damage of high-temperature steam to heat exchange pipe, prolongs the service life of heat exchange pipe, enhances the stability of ammonium chloride high-salt wastewater evaporation treatment equipment, and helps the progress of water pollution control and treatment work.

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

The utility model relates to the technical field of industrial production of pleuromutilin, and specifically discloses a pleuromutilin extraction system to solve the problems of low yield, insufficient purity and low efficiency of clarity treatment in the existing pleuromutilin extraction mode, which comprises a three-stage countercurrent leaching system, a double-effect evaporation system, a methanol evaporation kettle, a layered tank and a vacuum evaporation crystallization system connected in sequence from the head to the tail. The three-stage countercurrent leaching system comprises three countercurrent leaching tanks and dryers connected in series from the head to the tail, and the discharge end of the first countercurrent leaching tank and the discharge end of the second countercurrent leaching tank are both provided with a slag excavator, and the discharge end of the third countercurrent leaching tank is provided with a slag extruder. The extraction system is used for extracting and processing pleuromutilin, and the pleuromutilin has high yield, high degree of automation and high purity.

The utility model relates to evaporative crystallization device technical field discloses a condensate water recovery structure of three -effect evaporative crystallization device, including condenser body, the input end fixed connection of condenser body has input pipe, the output end fixed connection of condenser body has output pipe, the side of output pipe is installed with secondary condensation subassembly, the inside setting of secondary condensation subassembly has radiating fan, the inside fixed assembly of radiating fan is installed, the secondary condensation subassembly includes the even heat plate, the even heat plate sets up the outside of output pipe, the top fixed connection of output pipe has heat pipe and mounting bracket, the side fixed connection of heat pipe has radiating fin, the utility model discloses in, set up the combination structure of even heat plate, heat pipe, radiating fin and radiating fan on output pipe, the steam that can be further cooled in not completely condensed when flowing through the export, the problem of condensing capacity deficiency when high temperature or high load operation.

This utility model discloses a solvent evaporator vapor phase heat recovery system. The solvent vapor outlet of the descaling machine is connected to the shell side of the first evaporator, the outlet of the mixed oil inlet pipe is connected to the tube side inlet of the first evaporator, the bottom outlet of the first evaporator tank is connected to the shell side inlet of the mixed oil heat exchanger, the shell side outlet of the mixed oil heat exchanger is connected to the tube side inlet of the second evaporator, the secondary steam outlets of the first and second evaporator tanks are connected to the shell side inlet of the heat pump evaporator, the tube side outlet of the heat pump evaporator is connected to the compressor inlet, the compressor outlet is connected to the shell side inlet of the heat pump condenser, the shell side outlet of the heat pump condenser is connected to the tube side inlet of the heat pump evaporator through an expansion valve, the tube side outlet of the heat pump condenser is connected to the flash tank, the bottom outlet of the flash tank is connected to the tube side inlet of the heat pump condenser through a circulating pump, and the top secondary steam outlet of the flash tank is connected to the steam inlet of the descaling machine. This system can reduce the consumption of steam and cooling water in oil processing.

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.

The application discloses a waste heat utilization system and relates to the technical field of sewage treatment. The waste heat utilization system comprises a low-temperature multi-effect distillation device, a flue gas heat exchanger, a first flash tank, a second flash tank and a make-up water heater. The low-temperature multi-effect distillation device is provided with sewage inlets. The cold source inlet of the flue gas heat exchanger is communicated with the product water outlet of the low-temperature multi-effect distillation device. The water inlet of the first flash tank is communicated with the cold source outlet of the flue gas heat exchanger. The steam outlet of the first flash tank is communicated with the steam inlet of the first effect body. The water inlet of the second flash tank is communicated with the condensate water outlet of the first effect body. The heat source inlet of the make-up water heater is communicated with the steam outlet of the second flash tank. The cold source outlet of the make-up water heater is communicated with the make-up water inlet of at least one evaporation effect body. The waste heat utilization system realizes the step-by-step utilization of heat energy, greatly improves the overall thermal efficiency, reduces the energy consumption and cost of unit water production and solves the problem of energy consumption of high-temperature condensate water cooling.

This utility model discloses an apparatus for preparing ethylene glycol, comprising: an oxidation reactor; an absorption tower, the inlet of which is connected to the outlet of the oxidation reactor; a stripping tower, the top of which is connected to the bottom of the absorption tower; an ethylene glycol reactor, the inlet of which is connected to the top of the stripping tower; a water treatment unit, the inlet of which is connected to the bottom of the stripping tower; a multi-effect evaporation unit, including two inlets, one inlet connected to the outlet of the water treatment unit and the other inlet connected to the outlet of the ethylene glycol reactor; a dehydration tower, the inlet of which is connected to one outlet of the multi-effect evaporation unit; a condenser, the inlet of which is connected to the top of the dehydration tower, and the outlets including a gas phase outlet and a liquid phase outlet, which are connected in parallel to the top of the dehydration tower; and a transmission pipeline, the inlet of which is connected between the gas phase outlet, the liquid phase outlet and the top of the dehydration tower, and the outlet of which is connected between the bottom of the stripping tower and the inlet of the water treatment unit. The ethylene glycol preparation apparatus provided by this utility model can improve economic efficiency.

The application belongs to the technical field of chemical industry, and particularly relates to a cottonseed dephenolized concentrated protein extraction equipment and method, which comprises pretreatment unit, extraction unit, post-treatment unit, evaporation and concentration unit and solvent recovery unit connected in sequence. The pretreatment unit comprises double roller embryo press, bulking machine and turnover plate cooler. The extraction unit comprises extractor A for removing oil and fat by n-hexane extraction and extractor B for removing gossypol by methanol extraction. The post-treatment unit comprises horizontal screw conveyor dryer A and horizontal screw conveyor dryer B for drying and desolventizing the extracted cottonseed meal to obtain cottonseed dephenolized concentrated protein. The evaporation and concentration unit is used for evaporating and concentrating the mixed oil and mixed liquid after extraction. The solvent recovery unit comprises multiple condensers connected with the evaporation and concentration unit. The application can realize low-temperature and high-efficiency extraction. The protein content of the extracted product cottonseed dephenolized concentrated protein is as high as 72.7-76.2%, the gossypol content is as low as 230-290 ppm, the residual solvent in the protein is as low as 280-340 ppm, and the product quality is high.

This invention relates to an apparatus and method for reducing biuret content in urea and nitrogen-potassium fertilizers, belonging to the field of urea and fertilizer production technology. The apparatus includes a urea evaporation and granulation system and a nitrogen-potassium fertilizer system. The urea tank is divided into main and auxiliary compartments in a 3:1 ratio by a partition. During normal production, only the auxiliary compartment is used to reduce residence time. In the evaporation system, the top of the heater is level with the lower liquid inlet of the separator, and symmetrically distributed double lower liquid inlets are configured to effectively eliminate backmixing dead zones. The upper tower pipeline adopts a main and auxiliary dual-pipe design with a cross-sectional area ratio of 2:1, which can be flexibly switched according to flow rate to maintain high flow velocity and is equipped with steam purging. The nitrogen-potassium fertilizer system uses a Venturi jet mixer instead of a traditional mixing tank, utilizing molten urea as the driving fluid to achieve instantaneous mixing. This invention significantly reduces the biuret content in the product through precise control of the material residence time throughout the entire process, and the apparatus has a simple structure and is easy to industrialize.

The utility model belongs to the technical field of caustic soda evaporation and concentration, and particularly relates to a triple-effect countercurrent falling film evaporation system for improving caustic soda concentration, which comprises a first-effect evaporation chamber, a second-effect evaporation chamber and a triple-effect evaporation chamber which are sequentially connected in series end to end, the flowing directions of low-concentration caustic soda and primary steam in the first-effect evaporation chamber, the second-effect evaporation chamber and the third-effect evaporation chamber are opposite, an alkali liquor heat energy recovery unit and a steam condensate heat energy recovery unit are additionally arranged, and the low-concentration caustic soda exchanges heat with the high-concentration caustic soda by means of the alkali liquor heat energy recovery unit; and the low-concentration caustic soda exchanges heat with the steam condensate of the next-stage evaporation chamber by means of the steam condensate heat energy recovery unit. The alkali liquor heat energy recovery unit and the steam condensate heat energy recovery unit are additionally arranged for heat energy recovery, and through dual heat energy recovery, the heat energy utilization rate is improved, the primary steam consumption is reduced, and therefore the production energy consumption cost is reduced.

The utility model provides a kind of sodium glutamate continuous crystallization equipment, including one-effect heater, two-effect heater, three-effect heater and gas cylinder, the top of one-effect heater, two-effect heater and three-effect heater is separately installed with one-effect separation chamber, two-effect separation chamber and three-effect separation chamber, the gas cylinder is connected with one-effect heater by first gas pipe, and the one-effect heater is connected with two-effect heater by second gas pipe.The sodium glutamate continuous crystallization equipment, with solubility in one-effect heating process, some capillary crystals are dissolved, so that a part of nucleation crystal is effectively and quickly grown and uniform, continues to evaporate and concentrates in the inside of two-effect heater, and under the transmission of circulating pump, material is circulated in the inside of circulating pipe and is flashed in separation chamber, until the volume of crystal meets the requirement, in the process of continuous crystallization, sodium glutamate can be fully crystallized and grown, and sodium glutamate meeting large volume standard can be produced.

The present application relates to a kind of glycol regeneration and recovery system based on electrodialysis desalination technology, belong to oil and gas exploitation technical field, applied to offshore oil and gas field and future natural gas hydrate exploitation.Its technical points are: including pretreatment unit, electrodialysis unit, double-effect evaporation unit, auxiliary system, vacuum unit, each part is connected by corresponding pipeline, constitute a kind of based on electrodialysis desalination, double-effect evaporation technology offshore natural gas hydrate exploitation glycol regeneration and recovery system, the present application introduces glycol electrodialysis desalination monovalent salt technology, glycol double-effect evaporation dehydration technology, auxiliary system self-circulation salt balance technology, with the advantages of environmental protection, low energy consumption, small volume, flexible arrangement, low operating cost.

An eFuels plant and process for producing synthetic hydrocarbons using renewable energy are disclosed. The eFuels plant comprises a hydrocarbon synthesis (HS) system and a renewable feed and carbon / energy recovery (RFCER) system. The RFCER comprises a heat integration system between an electrolysis unit and a thermal desalination unit. The thermal desalination unit is configured to receive seawater and a first amount of thermal energy and to produce a desalinated water stream and a brine effluent stream. The electrolysis unit is configured to receive a demineralized water stream and an amount of electrical energy to produce a hydrogen stream, an oxygen stream, and a second amount of thermal energy, wherein the second amount of thermal energy is absorbed by a second low temperature heat transfer fluid stream to produce a second high temperature heat transfer fluid stream. A fluidly segregated piping system containing a heat transfer fluid is configured to withdraw heat from the electrolysis unit and deliver heat to the thermal desalination unit. A control system manages flows of the heat transfer fluid between the electrolysis unit and the thermal desalination unit, the addition of heat to the flow to the thermal desalination unit, and / or the removal of heat from the flow to the electrolysis unit.

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.

The application discloses a thermal pressure type multi-effect evaporation device control method and system based on an ejector working condition, relates to the technical field of thermal vapor compression multi-effect distillation devices, and determines an optimal working condition interval of an ejector in a high-grade steam pressure fluctuation interval according to an ejector and a multi-effect evaporation device mechanism model and in combination with device trial operation data; in the optimal working condition interval of the ejector, an optimal control target point of the ejector working condition is searched for according to a current state of the device through an optimization algorithm; according to the optimal control target point of the ejector working condition, model predictive control is adopted to perform optimal control of the ejector working condition under the condition of meeting the operation state constraints of the multi-effect evaporation device, and corresponding control values are obtained; the control values are input into a PID controller, the PID controller adjusts the operation frequency of a pump body, closed-loop regulation and control of a controlled variable are realized, the influence of high-grade steam pressure on the operation effect of the thermal pressure type multi-effect evaporation device is effectively reduced, operation energy consumption is reduced, and control effect and safety performance are improved.

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.

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.

The present application relates to a kind of gold leaching high-salt wastewater zero discharge treatment process and system, gold leaching high-salt wastewater zero discharge treatment process includes wastewater pretreatment, multistage filtration, membrane concentration and evaporation crystallization process;Wherein, wastewater pretreatment is used to remove most of suspended solids, hardness substance and heavy metal ions in gold leaching high-salt wastewater;Multistage filtration is used to remove small particles and organic pollutants in gold leaching high-salt wastewater;Membrane concentration is used to concentrate treatment to gold leaching high-salt wastewater;Evaporation crystallization is used to evaporate crystallization to the concentrated gold leaching high-salt wastewater, make the chloridion and sulphate in it into solid miscellaneous salt;The wastewater quality after evaporation crystallization reaches gold leaching process system reuse standard.The present application can effectively solve the problem that existing gold leaching high-salt wastewater treatment process pollutant is not completely removed, energy utilization rate is low, economic benefit and environmental protection are poor.

This invention relates to the field of wastewater treatment technology and relates to a high-efficiency skid-mounted thermal wastewater thickening device. It includes a movable skid-mounted support frame on which a thickening device is integrated. The thickening device comprises a first-effect evaporator and a last-effect evaporator. The heat source end of the first-effect evaporator is connected to a low-temperature heat source, and the condensate outlet of the first-effect evaporator is also connected to the low-temperature heat source via a steam-water balance pipeline. The heat source end of the last-effect evaporator is connected to the secondary steam outlet of the first-effect evaporator. This invention addresses the problems of traditional evaporation and thickening processes requiring extremely high-performance steam compressors, resulting in bulky equipment, large footprint, and inability to achieve multi-point mobile operation; the severe scaling inside heat exchange tubes caused by high-temperature evaporation of traditional high-concentration wastewater; and the high operating costs due to the direct discharge of latent heat from secondary steam and waste heat from condensate, which cannot be utilized in stages.

This utility model discloses a small-scale heat pump triple-effect vacuum falling film thickener, including a frame and a control box mounted on the frame. A thickening device is located on the upper layer of the frame, a steam boiler on the middle layer, and a heat pump device on the lower layer. The steam boiler's outlet pipe is connected to the thickening device, and the heat pump device is also connected to the thickening device. A circulating pump is installed between each heat exchanger in this utility model. Material is drawn in under negative pressure, transported to the next effect by the circulating pump, and finally discharged from the outlet pump. The entire process is continuous, with a short thickening cycle, stable heat transfer, and high efficiency. Simultaneously, by incorporating the heat pump device, the sensible and latent heat of the thickener unit can be reused, maintaining a constant temperature without damaging the material properties. This results in energy saving, environmental protection, and strong stability.