89 results about "Flash-gas" patented technology

The utility model relates to the field of natural gas dehydration, and discloses a natural gas cold energy dehumidification system which comprises a dehumidification structure and a water storage buffer tank, a flow meter is arranged on a gas inlet pipe of a high-pressure natural gas pipeline, the dehumidification structure comprises a dehumidification box body communicated with the high-pressure natural gas pipeline, and a heat exchange pipeline is arranged in the dehumidification box body. Low-temperature flash steam circulates in the heat exchange pipeline, a flow control valve used for controlling the flow of the low-temperature flash steam is arranged on the heat exchange pipeline, the bottom of the dehumidification box communicates with a water storage buffer tank through a pipeline, and a drainage valve is arranged at the bottom of the water storage buffer tank. Natural gas in the high-pressure natural gas conveying pipeline is cooled through low-temperature flash steam guided out of the LNG storage tank, so that water vapor mixed in the natural gas is liquefied when meeting cold, collected condensate water is discharged in time, the dehumidification system can continuously and automatically work, the water vapor content in the natural gas is reduced, and the energy consumption is reduced. The dehumidification device has the advantages of simple structure, low cost and excellent dehumidification effect.

The utility model belongs to the technical field of coal gasification high-pressure flash steam purification, and particularly relates to a coal gasification high-pressure flash steam purification device. The purification section is arranged above the heat exchange section of the hot water tower, high-pressure flash steam subjected to heat exchange with grey water is washed and purified, ammonium salt and ash in the high-pressure flash steam are removed, meanwhile, the flushing device is arranged on the cooler, the tube pass of the cooler is flushed, and the heat exchange efficiency is improved. Ammonium salt and ash attached to the inner wall of the cooler tube pass are flushed, so that the cooler tube pass can be efficiently prevented from being blocked; and the cooled high-pressure flash steam is subjected to gas-liquid separation, so that ammonium salt, ash and moisture in the high-pressure flash steam are greatly reduced, the high-pressure flash steam is purified and fed into a compressor, and the load and damage frequency of the compressor are reduced.

The embodiment of the invention provides an estimation method and device for refrigerant stock of a refrigerating system and the refrigerating system. The method comprises the steps that first temperature information and first pressure information of a refrigerant at an outlet of a condenser and second temperature information of a refrigerant at an inlet of an expansion valve are obtained; according to the first pressure information and the first temperature information, the supercooling degree of an outlet of the condenser is determined; according to the difference between the supercooling degree of the outlet of the condenser and a preset supercooling degree threshold value, it is judged that abnormal flash gas exists in the refrigerating system; according to the first temperature information, the second temperature information and latent heat of vaporization of the refrigerant under the first pressure information, the flash gas ratio is calculated, the supercooling degree of an outlet of the condenser is corrected, and the corrected supercooling degree is obtained; and according to the corrected supercooling degree of the condenser outlet, the refrigerant stock of the refrigerating system is estimated based on a correlation model of the corrected supercooling degree of the condenser outlet and the refrigerant stock. According to the technical scheme provided by the embodiment of the invention, the accuracy of quality estimation of the refrigerant stock can be improved.

The present application provides a kind of gasification fine slag dewatering drying recycling method and system, using the scheme of the present application, can carry out dewatering drying to high water content gasification fine slag and be used as fuel and be used as resource.The method comprises the following steps: 1) coal gasification black water is treated in black water treatment unit, and flash gas and the gasification fine slag to be treated are obtained;2) the gasification fine slag to be treated is sent into fine slag preheater and is preheated with heat medium;3) the preheated gasification fine slag is sent into drying device and exchanges heat with superheated steam, and dry gasification fine slag and secondary steam are obtained;4) secondary steam is treated by dust removal, and the obtained dust removal secondary steam is sent into fine slag preheater and used as the heat medium;5) the secondary steam output from fine slag preheater is superheated, and superheated steam is obtained;superheated steam is sent into drying device for the heat exchange;6) dry gasification fine slag is sent into combustion unit as fuel and used.

The invention discloses a subcooler and a deep subcooler for a refrigerating system and a control method of the subcooler and the deep subcooler, and belongs to the technical field of refrigeration. The deep subcooler comprises a subcooling heat exchange unit, an independent cold source loop and a pressure control valve; the supercooling heat exchange unit is connected between the high-pressure liquid reservoir and the throttling device in series, and the primary liquid refrigerant is deeply cooled to be equal to or close to the target value of the evaporation temperature through low-temperature cooling capacity provided by a low-pressure evaporation system or an independent cold source loop. The independent cold source is driven by a compressor with the minimum refrigerating capacity in the system, and an air return pipeline of the independent cold source is bridged with air return pipelines of other compressors of the system through an outlet pressure balance valve, so that the surplus refrigerating capacity is fully utilized. The evaporation pressure of a cold source loop is changed by monitoring the supercooled liquid temperature and feeding back and adjusting the opening degree of a pressure control valve, precise closed-loop control over the supercooled temperature is achieved, throttling flash gas can be remarkably reduced or even eliminated, the effective refrigerating capacity of unit refrigerant and the heat exchange efficiency of an evaporator are improved, and the system energy efficiency is greatly improved.

According to the energy utilization system based on steam gradient utilization and waste heat recovery, one part of steam generated by a steam generation device flows into a first user port, and the other part of the steam flows into a first ejector through a working fluid inlet of the first ejector; condensed water generated by the steam in the pipeline enters the flash evaporator; an outlet of the first user port is connected with a working fluid inlet of the first ejector, a flash gas outlet is connected with a driving fluid inlet of the first ejector, and an outlet of the first ejector is connected with the second user port; and the flash liquid outlet is connected with a driving fluid inlet of the first ejector, an outlet of the first ejector is connected with the hydraulic turbine, and an outlet of the hydraulic turbine is connected with the third user port. Therefore, different users can use the flash evaporation system through different ports according to requirements, step-by-step release and utilization of energy are achieved, in addition, the system can utilize waste heat of flash evaporation steam which is emptied originally, and the energy utilization rate of the system is improved.

The invention relates to the technical field of low-temperature methanol washing, in particular to a low-temperature methanol washing method matched with a pulverized coal gasification device and a low-temperature methanol washing device matched with the pulverized coal gasification device. According to the method, the H2S absorption process is optimized, and H2S absorption is performed on the synthesis gas by using low-sulfur methanol, non-conversion CO2-rich methanol and non-conversion H2S-rich methanol, so that the use amount of first-stage CO2-rich methanol is reduced; the technical problem that CO2 flash steam in a medium-pressure flash tower is secondarily polluted is solved by optimally setting a medium-pressure flash evaporation process and using classified flash evaporation and classified washing technologies; and by optimally arranging a reabsorption process, low-sulfur methanol is generated and fully utilized.

The application discloses a liquefied natural gas flash gas liquefaction system and method for a ship and relates to the technical field of liquefied natural gas storage. The following scheme is provided, which comprises a nitrogen expansion refrigeration unit and further comprises a liquefaction heat exchange mechanism, wherein the liquefaction heat exchange mechanism comprises a plate heat exchange assembly and a circulating flow channel adjusting mechanism; the plate heat exchange assembly comprises a heat exchange plate group composed of alternately superimposed first heat exchange plates and second heat exchange plates; the circulating flow channel adjusting mechanism comprises a synchronous frame capable of moving along a direction parallel to plate superimposition, a valve pipe fixed to the synchronous frame and arranged in correspondence with the angular hole channel, and a driving unit for driving the synchronous frame to move. By means of mechanical adjustment, dynamic changes in BOG load are matched in real time, so that the system can be operated close to an optimal energy efficiency point in the whole working condition range, and operation energy consumption is reduced.

The utility model relates to the technical field of high-flash gas recovery, in particular to a gasification grey water high-flash gas recovery device which comprises a first condenser, a second condenser, a torch and a boiler. And a second treatment pipeline is fixedly communicated between the outlet of the second condenser and the first treatment pipeline. The device is reasonable and compact in structure and convenient to use, gasified grey water high-flash gas sent out by the high-pressure flash tank is condensed by the first condenser and then sent into the boiler for blending combustion of byproduct steam, the gasified grey water high-flash gas can be effectively recycled, the combustible gas byproduct steam rich in the gasified grey water high-flash gas is utilized, and the utilization rate of the byproduct steam is improved. The consumption of torch natural gas is reduced, the release of waste gas is reduced, and the environmental protection pressure is relieved.

The invention provides an apparatus and method for producing a hydrogen rich gas, the method comprising the steps of reforming a hydrocarbon feed in an autothermal reformer to obtain a synthesis gas; shifting the synthesis gas in a shift configuration comprising a high temperature shift step; removing CO2 in a CO2 removal section by amine washing to form a hydrogen rich stream, wherein a portion is used as a low carbon hydrogen fuel; and forming a CO2 rich gas stream and a high pressure flash gas stream. The high pressure flash gas stream is advantageously integrated into the apparatus and method to further improve carbon capture.

An apparatus includes a high side heat exchanger, a flash tank, a load, a compressor, and a heat exchanger. The high side heat exchanger removes heat from a refrigerant. The flash tank stores the refrigerant from the high side heat exchanger and to discharge a flash gas. The load uses the refrigerant from the cool a space proximate the load. The compressor compresses the refrigerant from the load. The heat exchanger transfers heat from the refrigerant from the compressor to the flash gas before the refrigerant from the compressor reaches the high side heat exchanger. The heat exchanger directs the flash gas to the compressor after heat from the refrigerant from the compressor is transferred to the flash gas and directs the refrigerant from the compressor to the high side heat exchanger after heat from the refrigerant from the compressor is transferred to the flash gas.

The utility model discloses a conversion and gasification waste heat comprehensive utilization device, which is characterized in that conversion gas enters a secondary conversion furnace for chemical reaction to release heat, and then enters a low-pressure steam generator for heat exchange with boiler water to produce 0.5 MPa saturated steam. After heat exchange, the converted gas enters a boiler feed water preheater to exchange heat with boiler feed water, the boiler feed water after heat exchange enters a low-pressure steam generator, the converted gas enters a first desalted water heater to exchange heat with normal-temperature desalted water, and hot desalted water after heat exchange enters a gasification deaerator. One path of low-pressure flash steam discharged from the top of the gasification low-pressure flash separator enters the gasification deaerator, the other path of low-pressure flash steam enters the generator set for power generation, during normal production, the third regulating valve is in a closed state, and all the gasification low-pressure flash steam is used for power generation. The conversion low-grade chemical reaction waste heat is used for heating the desalted water of the gasification deaerator, the gasification low-pressure flash steam is reduced and used for heating the desalted water of the gasification deaerator, the generating capacity of the gasification low-pressure flash steam is improved, and comprehensive utilization of conversion and gasification waste heat is achieved.

To provide systems and methods for cooling and separating co-products from a pyrolysis system.SOLUTION: Embodiments include, in some instances, a pyrolysis system comprising a pyrolysis reactor including a pyrolysis chamber to generate a product stream from a system feed, a plurality of separation components to separate the product stream, one or more heat exchange components coupled to one or more of the plurality of separation components, and a solids collection component to collect separated non-gas products. Some embodiments include, in some instances, a pyrolysis system comprising the pyrolysis reactor, the plurality of separation components including an adsorption separation component that includes first and second adsorption components, and a plurality of valves configured to control flow of the gas product stream and a flushing gas. Some embodiments include a pyrolysis system comprising the pyrolysis reactor, a regeneration feed, a plurality of valves, a burner, and one or more separation components. Some embodiments include a method of separating components of a product stream.SELECTED DRAWING: Figure 1

The invention relates to the field of hydrogenation utilization of C5 raffinate oil, and discloses a method and a system for lightening C5 raffinate oil. The method comprises the following steps: removing impurities from a C5 raffinate oil raw material through a pretreatment tower, and performing heat recovery through a hydrogenation reactor and Rankine cycle in sequence; a reaction product is subjected to primary gas-liquid separation to obtain circulating liquid and a liquid phase product, and after the gas phase product is cooled, light hydrocarbon is sent to secondary gas-liquid separation to recover liquid phase light hydrocarbon and hydrogen-rich tail gas. According to the process, hydrogenation reaction heat is utilized in a stepped and segmented mode, refrigeration is conducted through a Rankine refrigeration unit, low-temperature cooling capacity for flash evaporation gas-liquid separation is provided, and then raw materials are preheated through reaction materials obtained after heat exchange. The method can be used for treating C5 raffinate oil, the reaction efficiency is high, the separation effect is good, and the yield of C5 chemical products is increased; the method has the advantages of high efficiency, energy conservation, high conversion activity, high product yield and improvement of the added value of the product.

The application discloses a kind of based on two-stage compression heat pump's heat engine unit deep waste heat cascade utilization system, comprising, negative pressure flash gas flue waste heat recovery system, two-stage voltage compression heat pump unit, coal-fired cogeneration unit and heat network heater;Through two-stage compression heat pump, the deep utilization of circulating water waste heat and flue gas waste heat is carried out in turn, based on the principle of negative pressure flash, make slurry flash cooling, achieve the purpose of indirect recovery of flue gas waste heat, improve the flue gas waste heat utilization depth of unit, improve overall thermal efficiency and heating capacity, reduce coal consumption, realize energy saving and carbon reduction;The system improves the heating capacity while increasing peak shaving depth, meet the technical requirements of flexible adjustment and energy saving and carbon reduction in three improvement linkage requirements, can actively respond to the depth of power grid peak shaving ball, while meeting the heating load demand, reduce the coal consumption of unit.

The invention belongs to the technical field of air conditioning refrigeration, and relates to a carbon dioxide transcritical refrigeration system with an ejector for assisting hot gas defrosting, which comprises a main compressor and a parallel compressor, an inlet of the main compressor is connected with a circulating barrel, an outlet is connected with a gas cooler, an inlet of the parallel compressor is connected with a flash tank, and an outlet is connected with the gas cooler; an outlet of the gas cooler is respectively connected with a subcooler and an ejector; the subcooler is sequentially connected with a high-temperature throttle valve, a flash tank, a low-temperature throttle valve and a circulating barrel; the ejector is sequentially connected with the subcooler, the defrosting evaporator, the defrosting throttle valve and the flash tank. The ejector is adopted for assisting hot gas defrosting, and the power consumption of the parallel compressor is effectively reduced; meanwhile, the subcooler is adopted, the characteristic that the temperature of an outlet of the ejector is low is utilized, gas passing through the subcooler continues to be cooled, the mass of flash gas in the flash tank can be effectively reduced, more liquid enters the circulating barrel, the refrigerating capacity is increased, and the COP of the whole system is improved.

The application discloses a kind of decarburization flash gas pressurization recovery device for synthesis ammonia production, it is related to the technical field of flash gas recycling.The present application includes flash tank, the position of left side of flash tank is provided with separation tank, the position of front of flash tank is provided with gas storage tank, the middle position of front side wall of separation tank is fixed with the refrigerating machine that is connected with its inside, the inside of separation tank is provided with separation pipe, the position of rear side of separation tank outside is provided with rotating rod corresponding to rotating hole, the front end of rotating rod is fixed with the metal plate that is connected with the rear side wall of separation tank, the rear side wall of separation tank is fixed with the magnetic ring plate that is adsorbed with metal plate in the position of rotating hole periphery.The present application carries out temperature control to the inside of separation tank by the setting of refrigerating machine, can improve the generation ratio of flash gas, realize the control of the recovery amount of flash gas, simultaneously, the separation of metal plate and magnetic ring plate can make the inclination angle adjustment of rotating rod to separation pipe, improve the recovery efficiency of gas-liquid separation.

The invention discloses an effective gas emission reduction device and process in a low-temperature methanol washing purification process, the device comprises a gas stripping tower, a flash tank, a downcomer, a first heat exchanger, a second heat exchanger, a third heat exchanger and a fourth heat exchanger, the upper end of the gas stripping tower is provided with a methanol-rich input pipe with a pressure reducing valve, and the top of the gas stripping tower is provided with a flash steam output pipe; the lower end of the downcomer or the outlet of the pump is connected with a shell pass inlet of a first heat exchanger, a shell pass outlet of the first heat exchanger is connected with a shell pass inlet of a second heat exchanger through a third connecting pipe, and a shell pass outlet of the first heat exchanger is connected with a flash tank through a fourth connecting pipe; and the lower end of the flash tank is connected with a tube pass inlet of the first heat exchanger through a sixth connecting pipe, and a tube pass outlet of the first heat exchanger is connected with a tube pass inlet of the third heat exchanger through a seventh connecting pipe. Compared with the prior art, the device has the advantages that rich methanol is subjected to gas stripping and heating flash evaporation through the gas stripping tower, flash evaporation gas serves as a gas stripping gas source, and compared with a traditional technology, energy consumption is not increased, but effective gas is more thoroughly recycled.

A method and corresponding apparatus for extracting ethane from an initial natural gas stream. The method includes the steps of recovering and compressing an overhead stream (98) from a separation column (34) to form a compressed purified natural gas stream (102); liquefying the compressed purified natural gas stream (102) in a liquefaction unit (24) to form a pressurized liquefied natural gas stream (120); flash expanding the pressurized liquefied natural gas stream (120) and recovering in a storage vessel (66); recovering and compressing an expanded flash gas stream (126); separating the compressed flash gas stream (132) into a fuel stream (20) and a recycle stream (134); cooling and expanding the recycle stream (134) and then introducing the cooled and expanded recycle stream into an overhead stage of the separation column (34).

The invention relates to the technical field of coal chemical industry flash steam treatment, in particular to a coal chemical industry high flash steam energy-saving and resource-recycling double-effect zero-emission process which comprises the steps that gathered high-pressure flash steam enters a newly-added low-pressure steam generator after being converged, and generated steam can enter a steam pipe network at the same time; steam cooled by the low-pressure steam generator enters a gas-liquid separator for gas-liquid separation, and then enters a washing tower for washing fine ash recovery raw materials and cooling; according to the coal chemical industry high-flash gas energy-saving and resource recovery double-effect zero-emission process, a high-pressure flash tank is arranged to convey a mixed solution discharged through multiple paths to a low-pressure steam generator in a unified temperature range, high-flash gas in the low-pressure steam generator is subjected to waste heat utilization, high-temperature heat energy is utilized to generate saturated steam, and the saturated steam is conveyed to a factory for use; part of the mixture of the acid gas and the aqueous solution is separated through the gas-liquid separator, and the high-flash gas is washed and cooled through the washing tower, so that resource waste caused by torch emission is reduced.

The application discloses a PSA tail gas compressor group component allocation stabilizing system and a method thereof, and belongs to the field of chemical engineering technology. The system is characterized in that the cold box raw material gas is communicated with a first pipeline, flash gas is connected with a third pipeline, rich hydrogen gas is connected with a second pipeline of an inlet of a PSA device, CO product gas is connected with a fourth pipeline, a hydrogen gas outlet of the PSA device is connected with a fifth pipeline, a tail gas outlet sixth pipeline is connected with a seventh pipeline of an inlet of a tail gas compressor, a tail gas outlet of the tail gas compressor is connected with an eighth pipeline, a ninth pipeline of an inlet of a first regulating valve is connected with the fifth pipeline, a tenth pipeline of an outlet is connected with the sixth pipeline, an eleventh pipeline of an inlet of a second regulating valve is connected with the fourth pipeline, a twelfth pipeline of an outlet is connected with the sixth pipeline, and a thermal conductivity analyzer is arranged on the seventh pipeline. The application can realize stable PSA tail gas compressor inlet gas components by means of the thermal conductivity analyzer, the flowmeter and the regulating valve, and further ensure the performance and stable operation of the tail gas compressor.

This invention discloses a high-temperature, multi-stage adjustable heat recovery distillation system, belonging to the technical field of distillation systems. It includes a distillation column, an evaporator assembly, a compressor, a reboiler heat exchanger, an ejector, a gas-liquid separator, a first storage tank, and a second storage tank. The evaporator assembly includes a first evaporator and a second evaporator connected in series. One end of the distillation column is connected to the first evaporator, and the second evaporator is connected to the second storage tank. Both the first and second evaporators are connected to the ejector. One end of the gas-liquid separator is connected to one end of the ejector, and the other end is connected to the first storage tank, the first evaporator, and the second evaporator, respectively. This invention employs compression and ejection, utilizing the flash gas from the liquid supply as power to eject the heat pump working gas from the second evaporator, achieving multi-stage recovery of the condensation heat of the column top gas. This simultaneously increases the evaporation temperature, improves the heat pump distillation efficiency, and reduces operating costs.

The invention relates to the technical field of low-temperature methanol washing, in particular to a poly-generation low-temperature methanol washing method matched with a pulverized coal gasification device and a poly-generation low-temperature methanol washing device matched with the pulverized coal gasification device. According to the method, the H2S absorption process is optimally set, and low-sulfur methanol, secondary H2S-rich methanol, non-conversion CO2-rich methanol and primary CO2-rich methanol are used for treating the synthesis gas at the same time, so that the use amount of the primary CO2-rich methanol is reduced; a medium-pressure flash evaporation process is optimized, first-stage CO2 flash steam, first-stage H2S flash steam and second-stage H2S flash steam are washed with a strands of non-transformation CO2-rich methanol, low-sulfur CO2-rich methanol is obtained, and the utilization rate of the low-sulfur CO2-rich methanol is increased; the non-conversion H2S-rich methanol flash evaporation process is optimally arranged, so that the pollution of CO gas to CO2 product gas is avoided, and the low-temperature methanol washing device has the characteristic of low comprehensive energy consumption.

The present application relates to the technical field of high-pressure acid leaching. Provided is a high-pressure acid leaching system, comprising an autoclave, a preheater, a flash tank and an autoclave feed pump. The autoclave is connected to the flash tank, the flash tank is connected to the preheater to introduce a flash gas into the preheater, and the preheater is connected to the autoclave via the autoclave feed pump. High-pressure air is introduced into the autoclave and / or the flash tank. The introduction of the high-pressure air into the autoclave and / or the flash tank enables the flash gas and the high-pressure air to jointly enter the preheater, thereby increasing the internal pressure of the preheater and reducing the temperature of ore slurry at an outlet of the preheater, and thus avoiding or reducing the occurrence of cavitation.

The invention belongs to the technical field of recycling of waste liquid containing vinyl acetate and isododecane, and discloses a method and a system for separating and recycling waste liquid of an EVA (Ethylene Vinyl Acetate) device. The EVA device waste liquid is conveyed to a rectifying machine for rectification separation, vinyl acetate steam is obtained at the top, fraction liquid is obtained after condensation, one part of fraction liquid flows back into the rectifying machine, and the other part of fraction liquid serves as a vinyl acetate product to be extracted; the rectification residual liquid is conveyed to a first flash tank for flash evaporation, so that part of isododecane and residual vinyl acetate are subjected to flash evaporation to form mixed flash evaporation gas, and the mixed flash evaporation gas is extracted from the top of the first flash evaporation tank and sent back to the reboiler to heat kettle liquid; and heating first flash evaporation residual liquid discharged from the bottom of the first flash evaporation tank, feeding the first flash evaporation residual liquid into a second flash evaporation tank for flash evaporation, evaporating residual isododecane from the top of the second flash evaporation tank, and condensing to obtain an isododecane product. According to the method, the waste liquid of the EVA device is treated by adopting a separation method combining supergravity reduced-pressure rectification with two-stage flash evaporation, so that the self-polymerization reaction of vinyl acetate in the separation process is effectively reduced.

The utility model discloses a high-efficiency distributor for a refrigeration house, which comprises a main body, the sealing cover is fixedly arranged at the top end of the main body, the branching disc is fixedly arranged at the bottom end of the main body and used for sealing the bottom end of the main body, the liquid distribution needle column is fixedly inserted into a disc body of the branching disc and used for achieving coolant liquid distribution, and the liquid supply pipe is fixedly arranged in the middle of the branching disc and penetrates through the branching disc. The liquid supply pipe is arranged in the main body and used for supplying a coolant into the main body, the flow dividing cover is arranged in the main body and fixedly connected with the liquid supply pipe, the content of flash evaporation gas of the refrigerant discharged out of coolant liquid is reduced to a certain extent, and the discharge amount of the coolant liquid is more uniform through the liquid discharge mode; the influence on the refrigerating system caused by uneven distribution of the coolant liquid is reduced, the influence on the effect of the evaporator is reduced through even distribution of the coolant liquid, and the control precision of the refrigerating system and the adjusting range of the refrigerating capacity are guaranteed.

The application provides a kind of intelligent control method and system of Claus sulfur recovery unit, comprising: calling the decoupling model established in advance, using the real-time data in initial disturbance event record, calculate and separate out the contribution value of methanol flash gas descent and liquid nitrogen tail gas peak respectively on the independent and dynamic influence of total air demand, output two groups of time series data of independent disturbance influence;According to the output of two groups of time series data of independent disturbance influence, by superposition algorithm and combining respective time sequence characteristics, the net change amount of total air demand in future preset period is calculated, and the predicted net air demand change trajectory is obtained;According to the predicted net air demand change trajectory, combined with the current system state, the target air flow adjustment scheme is calculated by using optimization control algorithm, the predicted air demand change is compensated in advance, and the obtained air flow regulation instruction sequence is issued to the actuator of air supply system for execution.

The invention provides a condenser and a refrigerating system. The condenser comprises a shell, a partition piece, a plurality of condensation heat exchange pipes and a plurality of supercooling heat exchange pipes. The housing defines a cavity for receiving a refrigerant. The containing cavity is divided into a condensation area and a supercooling area through the partition piece. The condensation heat exchange pipes are arranged in the condensation area. The multiple supercooling heat exchange pipes are arranged in the supercooling area. A plurality of throttling holes are formed in the partition piece, the condensation area and the supercooling area are communicated through the throttling holes so as to allow refrigerant liquid obtained through condensation in the condensation area to enter the supercooling area through the throttling holes, and the size of the throttling holes is designed to enable the pressure of the refrigerant liquid passing through the throttling holes to be reduced and flash gas is generated. The supercooling area comprises an upper supercooling area body and a lower supercooling area body which are communicated with each other, the lower supercooling area body is located at the bottom of the shell in the height direction, the upper supercooling area body extends upwards from the lower supercooling area body and is at least partially surrounded by the condensation area, and supercooling heat exchange pipes are arranged in the upper supercooling area body and the lower supercooling area body.

The invention relates to the technical field of air conditioners, in particular to an air conditioning system and a control method thereof.The air conditioning system comprises a refrigerant circulation loop, a compressor, a condenser and an evaporator are arranged on the refrigerant circulation loop, the air conditioning system further comprises a bypass auxiliary path and a flash evaporator, and the flash evaporator is arranged on the refrigerant circulation loop and located between the condenser and the evaporator; one end of the bypass auxiliary path is connected with an air outlet of the flash evaporator, and the other end is connected with a pipeline between the evaporator and an air suction port of the compressor; and the gas refrigerant subjected to flash evaporation can enter the bypass auxiliary path and then is mixed with the refrigerant at the outlet of the evaporator to enter an air suction port of the compressor. The gaseous refrigerant after flash evaporation enters the bypass auxiliary path and is mixed with the refrigerant at the outlet of the evaporator to enter the air suction port of the compressor, it is guaranteed that the air suction temperature and the air suction pressure of the compressor are close to the non-frosting condition, the separated liquid refrigerant enters the evaporator to fully absorb heat and evaporate, and the frosting risk of the evaporator is reduced.

The application discloses a composite flash economizer, a water chilling unit and an operation method. The composite flash economizer is used for processing of refrigerant of the water chilling unit. The composite flash economizer comprises a flash tank body, a main liquid inlet pipeline, a main liquid outlet pipeline and a gas supplement outlet pipeline which is communicated with a gas inlet end of a compressor to supplement gas. A heat exchange pipeline is arranged in the flash tank body and is used for cooling saturated liquid refrigerant to form supercooled refrigerant. An outlet end of the heat exchange pipeline is communicated with an evaporator of the water chilling unit. Gaseous refrigerant generated by heat exchange directly enters the evaporator. The heat exchange pipeline is arranged in the flash tank body and exchanges heat with the saturated liquid refrigerant to form the supercooled liquid refrigerant. The application can reduce generation of flash gas, reduce the risk of containing liquid refrigerant in the compressor gas supplement and reduce the probability of liquid hammer.