WO2017181439A1 - Pressure dew point adjustable compressed air deep-drying apparatus and method - Google Patents

Pressure dew point adjustable compressed air deep-drying apparatus and method Download PDF

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WO2017181439A1
WO2017181439A1 PCT/CN2016/080710 CN2016080710W WO2017181439A1 WO 2017181439 A1 WO2017181439 A1 WO 2017181439A1 CN 2016080710 W CN2016080710 W CN 2016080710W WO 2017181439 A1 WO2017181439 A1 WO 2017181439A1
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air
solution
pressure
compressed air
control valve
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PCT/CN2016/080710
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French (fr)
Chinese (zh)
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殷勇高
邵彬
张小松
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东南大学
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B01D53/265—Drying gases or vapours by refrigeration (condensation)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B01D53/268—Drying gases or vapours by diffusion

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  • the invention relates to the technical field of air drying, and particularly relates to a compressed air deep drying device and method with adjustable pressure dew point.
  • Compressed air is an important process gas source and power source, widely used in petrochemical, metallurgy, electric power, machinery, electronics, food, medicine, national defense and other industries and sectors. In use, it is generally necessary to purify the compressed air to a certain quality level, and the key to purification is drying.
  • the compressed air solution dehumidification technology is a new type of air drying technology that uses a high pressure solution dehumidification technology to deeply dry compressed air.
  • the driving force of the solution dehumidification regeneration is the difference between the vapor pressure on the surface of the solution and the partial pressure of the air water vapor.
  • the vapor pressure on the surface of the solution is closely related to the solution temperature. Decreasing the temperature of the concentrated solution can enhance the dehumidification effect, so that the air after dehumidification reaches a lower moisture content; increasing the temperature of the dilute solution can enhance the regeneration effect.
  • the traditional solution cooling heating process increases energy consumption, improves the dehumidification regeneration process, and is necessary to improve energy efficiency.
  • the present invention provides a compressed air deep drying device and method with adjustable pressure dew point, which reduces the dehumidification dead zone, realizes deep dehumidification, meets different drying requirements, and solves the prior art. problem.
  • the technical solution adopted by the present invention is: a compressed air deep drying device with adjustable pressure dew point, characterized in that it comprises a compressed air treatment system and a solution dehumidification regeneration circulation system.
  • the compressed air treatment system includes a compressed air treatment component including an air inlet, an air compressor, a heat recovery device, an air cooler, a gas storage tank, a high pressure dehumidifier, a first control valve, an expander, and a gas-liquid heat exchange system. , a dry air outlet and a second control valve;
  • the air compressor outlet is connected to the first input end of the heat recovery device, the first output end of the heat recovery device is connected to the inlet of the gas storage tank through an air cooler, and the gas storage tank outlet is connected to the lower air inlet of the high pressure dehumidifier; high pressure dehumidification
  • the upper exhaust port of the device is connected to the air inlet of the expander via a first control valve, and the air outlet of the expander is connected to the first input end of the gas-liquid heat exchanger;
  • the solution dehumidification regeneration cycle system comprises a high pressure dehumidifier, a gas liquid heat exchanger, a third control valve, a pressurized solution pump, a high pressure liquid storage tank, a first throttle valve, a regenerator, a solution heater, a dilute solution pump , atmospheric pressure regenerator, fan, concentrated solution tank, water pump and fourth control valve;
  • the bottom end of the high-pressure dehumidifier is connected to the high-pressure liquid storage tank, and the outlet of the high-pressure liquid storage tank passes through the first throttle valve in turn.
  • the regenerator is connected to the first input end of the solution heater, and the first output end of the solution heater is connected to the top sprayer of the atmospheric pressure regenerator via a dilute solution pump; the bottom liquid discharge port of the atmospheric pressure regenerator is connected to the concentrated solution tank,
  • the solution tank outlet is connected to the second input end of the regenerator, and the second output end of the regenerator is sequentially connected to the second input end of the solution cooler through the third control valve, the high pressure solution pump, the second output end of the solution cooler and the boost dehumidifier
  • the top inlet port is connected, wherein the second output end of the heat recovery unit is connected to the second input end of the solution heater through a water pump, and the second output end of the solution heater is connected to the second input end of the heat recovery unit via a fourth control valve.
  • the compressed air treatment system and the solution dehumidification regeneration cycle system include a shared air compressor, a heat recovery unit, an air cooler, and a high pressure dehumidifier.
  • a filler or a hollow fiber membrane module is disposed in the high pressure dehumidifier.
  • a compressed air deep drying method with adjustable pressure dew point characterized in that the method comprises a compressed air treatment process, a high pressure solution dehumidification regeneration cycle process and an air compressor residual hot water process; specifically comprising the following steps:
  • Step 1 Compressed air treatment process: the air to be treated enters the air compressor from the air inlet and is compressed by the heat recovery device, then enters the air cooler to further cool down, and then enters the high pressure dehumidifier and the concentrated solution entering the dehumidifier through the gas storage tank. Drying compressed air is obtained by direct contact of the filler or indirect heat exchange with the hollow fiber membrane;
  • the dry compressed air at the outlet of the high pressure dehumidifier is directly output through the second control valve;
  • the outlet of the high pressure dehumidifier is The dry compressed air enters the expander through the first control valve for expansion and cooling, and the dry air expanded to a certain pressure is exchanged with the concentrated solution by the gas-liquid heat exchanger to output the dry air of the required pressure;
  • Step 2 Dehumidification regeneration cycle of high-pressure solution:
  • the dilute solution after dehumidification in the high-pressure dehumidifier enters the high-pressure liquid storage tank, after being throttled by the first throttle valve, enters the intermediate heat exchanger and enters the solution heater to be recovered by the heat recovery device.
  • the hot water generated by the residual heat is further heated, and then pumped into the atmospheric pressure regenerator through the dilute solution pump, and directly contacted with the regeneration air sent by the fan.
  • the moisture in the dilute solution is absorbed by the air and becomes a concentrated solution, then enters the concentrated solution tank, and then enters
  • the intermediate heat exchanger is pressurized by the pressurized solution pump through the third control valve, and then exchanges heat with the low-temperature dry air through the gas-liquid heat exchanger to be cooled into a high-pressure dehumidifier to form a solution dehumidification regeneration loop;
  • Step 3 Air compressor residual hot water flow process: In the heat recovery device, the hot water generated by the heat exchange between the high temperature compressed air at the outlet of the air compressor is driven by the water pump into the solution heater to return to the heat recovery device through the fourth control valve to complete the cycle. .
  • the compressed air after drying is expanded to the required pressure, and the dry air of different pressure is obtained at the same time, and the dehumidification solution is cooled and cooled by the generated cooling amount to reduce the dehumidification dead zone.
  • Deep dehumidification is now available to meet different drying requirements; and expansion work can be recovered for auxiliary air compressors to improve system energy efficiency.
  • the present invention provides a compressed air deep drying device and method with adjustable pressure dew point, which has the following advantages over the prior art:
  • Dehumidification of compressed air under high pressure environment can obtain deep dry compressed air.
  • the dried compressed air is expanded and cooled to adjust the temperature of the dehumidification solution, and compressed air of different pressure dew points can be obtained to meet different drying requirements;
  • the cooling amount generated by the expansion of the compressed air is used to cool the dehumidification solution, so that the moisture content after the compressed air is dried is smaller, the dehumidification dead zone is reduced, the drying effect of the compressed air is improved, and the hot water generated by the residual heat of the air compressor is driven.
  • Solution regeneration effectively reduces system energy consumption
  • the expansion work generated by the recovery expander is used to assist the air compressor to improve the energy utilization efficiency of the system.
  • Figure 1 is a schematic view of the apparatus of the present invention
  • FIG. 1 shows a compressed air deep drying device with adjustable pressure dew point, characterized in that it comprises a compressed air treatment system and a solution dehumidification regeneration circulation system.
  • the compressed air treatment system includes a compressed air treatment assembly including an air inlet 1, an air compressor 2, a heat recovery unit 3, an air cooler 4, a gas storage tank 5, a high pressure dehumidifier 6, a first control valve 7, An expander 8, a gas-liquid heat exchanger 9, a dry air outlet 10 and a second control valve 11;
  • the outlet of the air compressor 2 is connected to the first input end of the heat recovery unit 3, and the first output end of the heat recovery unit 3 is connected to the inlet of the gas storage tank 5 through the air cooler 4, and the outlet of the gas storage tank 5 and the lower side of the high pressure dehumidifier 6
  • the air inlet is connected;
  • the upper exhaust port of the high-pressure dehumidifier 6 is connected to the air inlet of the expander 8 via the first control valve 7, and the air outlet of the expander 8 is connected to the first input end of the gas-liquid heat exchanger 9;
  • the solution dehumidification regeneration cycle system comprises a high pressure dehumidifier 6, a gas liquid heat exchanger 9, a third control valve 12, a pressurized solution pump 13, a high pressure liquid storage tank 14, a first throttle valve 15, a regenerator 16, a solution heater 17, a dilute solution pump 18, a normal pressure regenerator 19, a fan 20, a concentrated solution tank 21, a water pump 22, and a fourth control valve 23;
  • the bottom end of the high-pressure dehumidifier 6 is connected to the high-pressure liquid storage tank 14, and the outlet of the high-pressure liquid storage tank 14 is sequentially connected to the first throttle valve 15 and the regenerator 16 to the first input end of the solution heater 17, and the solution heater 17
  • the first output is thin
  • the solution pump 18 is connected to the top shower of the atmospheric pressure regenerator 19; the bottom discharge port of the atmospheric pressure regenerator 19 is connected to the concentrated solution tank 21, and the outlet of the concentrated solution tank 21 is connected to the second input end of the regenerator 16, the regenerator
  • the second output end is connected to the second input end of the solution cooler 9 through the third control valve 12 and the high pressure solution pump 13, and the second output end of the solution cooler 9 is connected to the top inlet of the pressurized dehumidifier 6, wherein the heat recovery is performed.
  • the second output of the device 3 is connected to the second input of the solution heater 17 via a water pump 21, and the second output of the solution heater 17 is connected to the second input of the heat recovery unit 3 via a
  • the compressed air treatment system and the solution dehumidification regeneration cycle system include a shared air compressor 2, a heat recovery unit 3, an air cooler 4, and a high pressure dehumidifier 6.
  • a packing or hollow fiber membrane module is disposed in the high pressure dehumidifier 6.
  • the expansion machine 8 recovers the expansion work for the auxiliary air compressor 2. After the expansion and cooling air flows out of the expander 8, the dehumidification solution entering the high-pressure dehumidifier is cooled and cooled by the heat exchanger 9, thereby achieving deep dehumidification and reducing the dehumidification dead zone.
  • a compressed air deep drying method with adjustable pressure dew point characterized in that the method comprises a compressed air treatment process, a high pressure solution dehumidification regeneration cycle process and an air compressor residual hot water process; specifically comprising the following steps:
  • Step 1 compressed air treatment process: the air to be treated enters the air compressor 2 from the air inlet 1 and is cooled by the heat recovery unit 3, then enters the air cooler 4 to further cool and cool, and then enters the high-pressure dehumidifier 6 through the gas storage tank 5 and The concentrated solution entering the dehumidifier is directly contacted by the filler or indirectly subjected to heat and mass exchange through the hollow fiber membrane to obtain dry compressed air;
  • Step 2 High-pressure solution dehumidification regeneration cycle: The dilute solution after dehumidification in the high-pressure dehumidifier 6 enters the high-pressure liquid storage tank 14, is throttled by the first throttle valve 15, enters the intermediate heat exchanger 16 and is heated to enter the solution heater 17 The hot water generated by the waste heat recovered by the heat recovery unit 3 is further heated, and then enters the atmospheric pressure regenerator 19 via the dilute solution pump 18, and is directly in contact with the regeneration air sent from the blower 20, and the moisture in the diluted solution is absorbed by the air and becomes rich.
  • Step 3 Air compressor residual hot water flow process: in the heat recovery unit 3, with the high temperature compressed air at the outlet of the air compressor 2
  • the hot water generated by the heat exchange is driven by the water pump into the solution heater 17 and returned to the heat recovery unit 3 via the fourth control valve to complete the cycle.
  • the dehumidification process of the present invention is carried out in the high pressure dehumidifier 6, and the difference in water vapor pressure between the air and the solution surface is increased to obtain a more dry air.
  • the compressed air dried by the high-pressure dehumidifier 6 is expanded by the expander 8 to different pressures, thereby providing dry air of different pressures; the generated cooling amount is used for cooling the dehumidification solution, reducing the dehumidification dead zone, enhancing the dehumidification effect, and achieving deep dehumidification, Meet different drying requirements; at the same time, recover expansion work to assist compressed air 2, improve energy efficiency.

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Abstract

A pressure dew point adjustable compressed air deep-drying apparatus and method. The apparatus comprises a compressed air treatment system and a solution dehumidification regenerative circulation system. The compressed air treatment system comprises an air inlet (1), an air compressor (2), a heat recovery apparatus (3), an air cooler (4), an air storage tank (5), a high-pressure dehumidifier (6), an expander (8), a gas-liquid heat exchanger (9), and a dried air outlet (10). The solution dehumidification regenerative circulation system comprises the high-pressure dehumidifier (6), the gas-liquid heat exchanger (9), a pressurizing solution pump (13), a high-pressure liquid storage tank (14), a regenerator (16), a solution heater (17), a diluted solution pump (18), an atmospheric pressure regenerator (19), and a concentrated solution tank (21). An outlet of the air compressor (2) is connected to a first input end of the heat recovery apparatus (3). The first input end of the heat recovery apparatus (3) is connected to an inlet of the air storage tank (5) via the air cooler (4). An output of the air storage tank (5) is connected to a lower air inlet of the high-pressure dehumidifier (6). An upper air outlet of the high-pressure dehumidifier (6) is connected to an air inlet of the expander (8) via a first control valve (7). An air outlet of the expander (8) is connected to a first input end of the gas-liquid heat exchanger (9). The method comprises a compressed air treatment process, a pressurized solution dehumidification regenerative circulation process, and an air compressor residual heat water-heating process. Based on the compressed air isentropic expansion refrigeration principle, dried compressed air is expanded to a required pressure, dried air of different pressures is produced at the same time, and refrigeration produced is utilized in cooling a dehumidification solution, thus reducing a dehumidification blind spot, and implementing deep dehumidification.

Description

一种压力露点可调的压缩空气深度干燥装置及方法Compressed air deep drying device and method with adjustable pressure dew point 技术领域Technical field
本发明涉及空气干燥技术领域，具体涉及一种压力露点可调的压缩空气深度干燥装置及方法。The invention relates to the technical field of air drying, and particularly relates to a compressed air deep drying device and method with adjustable pressure dew point.
背景技术Background technique
压缩空气是重要的工艺气源及动力能源，广泛应用于石油化工、冶金、电力、机械、电子、食品、医药、国防等行业和部门。使用中一般需要对压缩空气进行净化处理，使其达到一定质量等级，净化的关键是干燥处理。压缩空气溶液除湿技术是一种新型空气干燥技术，采用高压溶液除湿技术可以对压缩空气进行深度的干燥。Compressed air is an important process gas source and power source, widely used in petrochemical, metallurgy, electric power, machinery, electronics, food, medicine, national defense and other industries and sectors. In use, it is generally necessary to purify the compressed air to a certain quality level, and the key to purification is drying. The compressed air solution dehumidification technology is a new type of air drying technology that uses a high pressure solution dehumidification technology to deeply dry compressed air.
溶液除湿再生的驱动力为溶液表面蒸汽压与空气水蒸气分压力之差，溶液表面的蒸汽压大小与溶液温度密切相关。降低浓溶液温度，可以增强除湿效果，使除湿后的空气达到更低是含湿量；升高稀溶液温度，可以使再生效果增强。传统的溶液冷却加热过程增加能源消耗，改进除湿再生流程，提高能源利用率十分必要。The driving force of the solution dehumidification regeneration is the difference between the vapor pressure on the surface of the solution and the partial pressure of the air water vapor. The vapor pressure on the surface of the solution is closely related to the solution temperature. Decreasing the temperature of the concentrated solution can enhance the dehumidification effect, so that the air after dehumidification reaches a lower moisture content; increasing the temperature of the dilute solution can enhance the regeneration effect. The traditional solution cooling heating process increases energy consumption, improves the dehumidification regeneration process, and is necessary to improve energy efficiency.
发明内容Summary of the invention
发明目的：为了克服现有技术中存在的不足，本发明提供压力露点可调的压缩空气深度干燥装置及方法，缩小除湿盲区，实现深度除湿，满足不同干燥程度的要求，解决了现有技术的问题。OBJECT OF THE INVENTION In order to overcome the deficiencies in the prior art, the present invention provides a compressed air deep drying device and method with adjustable pressure dew point, which reduces the dehumidification dead zone, realizes deep dehumidification, meets different drying requirements, and solves the prior art. problem.
技术方案：为实现上述目的，本发明采用的技术方案为：一种压力露点可调的压缩空气深度干燥装置，其特征在于，包括压缩空气处理系统和溶液除湿再生循环系统。Technical Solution: In order to achieve the above object, the technical solution adopted by the present invention is: a compressed air deep drying device with adjustable pressure dew point, characterized in that it comprises a compressed air treatment system and a solution dehumidification regeneration circulation system.
进一步的，所述压缩空气处理系统包括压缩空气处理组件包括空气进口、空气压缩机、热回收器、空气冷却器、储气罐、高压除湿器、第一控制阀、膨胀机、气液换热器、干燥空气出口和第二控制阀；Further, the compressed air treatment system includes a compressed air treatment component including an air inlet, an air compressor, a heat recovery device, an air cooler, a gas storage tank, a high pressure dehumidifier, a first control valve, an expander, and a gas-liquid heat exchange system. , a dry air outlet and a second control valve;
空气压缩机出口连接热回收器第一输入端，热回收器第一输出端通过空气冷却器与储气罐的进口连接，储气罐出口与高压除湿器的下侧进气口连接；高压除湿器的上侧排气口经第一控制阀连接膨胀机进气口，膨胀机出气口与气液换热器第一输入端相连；The air compressor outlet is connected to the first input end of the heat recovery device, the first output end of the heat recovery device is connected to the inlet of the gas storage tank through an air cooler, and the gas storage tank outlet is connected to the lower air inlet of the high pressure dehumidifier; high pressure dehumidification The upper exhaust port of the device is connected to the air inlet of the expander via a first control valve, and the air outlet of the expander is connected to the first input end of the gas-liquid heat exchanger;
所述溶液除湿再生循环系统包括高压除湿器、气液换热器、第三控制阀、增压溶液泵、高压储液罐、第一节流阀、回热器、溶液加热器、稀溶液泵、常压再生器、风机、浓溶液罐、水泵和第四控制阀；The solution dehumidification regeneration cycle system comprises a high pressure dehumidifier, a gas liquid heat exchanger, a third control valve, a pressurized solution pump, a high pressure liquid storage tank, a first throttle valve, a regenerator, a solution heater, a dilute solution pump , atmospheric pressure regenerator, fan, concentrated solution tank, water pump and fourth control valve;
高压除湿器底端排液口连接高压储液罐，高压储液罐的出口依次经过第一节流阀、 回热器连接溶液加热器第一输入端，溶液加热器第一输出端经稀溶液泵与常压再生器的顶部喷淋器相连；常压再生器的底部排液口连接浓溶液罐，浓溶液罐出口连接回热器第二输入端，回热器第二输出端依次经过第三控制阀、高压溶液泵连接溶液冷却器第二输入端，溶液冷却器第二输出端与增压除湿器顶端进液口相连，其中热回收器的第二输出端通过水泵连接溶液加热器第二输入端，溶液加热器第二输出端经第四控制阀与热回收器第二输入端相连。The bottom end of the high-pressure dehumidifier is connected to the high-pressure liquid storage tank, and the outlet of the high-pressure liquid storage tank passes through the first throttle valve in turn. The regenerator is connected to the first input end of the solution heater, and the first output end of the solution heater is connected to the top sprayer of the atmospheric pressure regenerator via a dilute solution pump; the bottom liquid discharge port of the atmospheric pressure regenerator is connected to the concentrated solution tank, The solution tank outlet is connected to the second input end of the regenerator, and the second output end of the regenerator is sequentially connected to the second input end of the solution cooler through the third control valve, the high pressure solution pump, the second output end of the solution cooler and the boost dehumidifier The top inlet port is connected, wherein the second output end of the heat recovery unit is connected to the second input end of the solution heater through a water pump, and the second output end of the solution heater is connected to the second input end of the heat recovery unit via a fourth control valve.
进一步的，所述压缩空气处理系统和溶液除湿再生循环系统包括共用的空气压缩机、热回收器、空气冷却器和及高压除湿器。Further, the compressed air treatment system and the solution dehumidification regeneration cycle system include a shared air compressor, a heat recovery unit, an air cooler, and a high pressure dehumidifier.
进一步的，所述高压除湿器内布置填料或中空纤维膜组件。Further, a filler or a hollow fiber membrane module is disposed in the high pressure dehumidifier.
一种压力露点可调的压缩空气深度干燥方法，其特征在于，该方法包括压缩空气处理流程、高压溶液除湿再生循环流程和空压机余热热水流程；具体包括以下步骤：A compressed air deep drying method with adjustable pressure dew point, characterized in that the method comprises a compressed air treatment process, a high pressure solution dehumidification regeneration cycle process and an air compressor residual hot water process; specifically comprising the following steps:
步骤一：压缩空气处理流程：待处理空气由空气进口进入空气压缩机压缩后经热回收器降温后进入空气冷却器进一步冷却降温，然后经储气罐进入高压除湿器与进入除湿器的浓溶液通过填料直接接触或通过中空纤维膜间接进行热质交换获得干燥的压缩空气；Step 1: Compressed air treatment process: the air to be treated enters the air compressor from the air inlet and is compressed by the heat recovery device, then enters the air cooler to further cool down, and then enters the high pressure dehumidifier and the concentrated solution entering the dehumidifier through the gas storage tank. Drying compressed air is obtained by direct contact of the filler or indirect heat exchange with the hollow fiber membrane;
当第一控制阀关闭，第二控制阀开启时，高压除湿器出口的干燥的压缩空气经第二控制阀直接输出；当第一控制阀开启，第二控制阀关闭时，高压除湿器出口的干燥的压缩空气经第一控制阀进入膨胀机进行膨胀制冷，膨胀到一定压力的干燥空气经气液换热器与浓溶液换热后输出所需压力的干燥空气；When the first control valve is closed and the second control valve is opened, the dry compressed air at the outlet of the high pressure dehumidifier is directly output through the second control valve; when the first control valve is opened and the second control valve is closed, the outlet of the high pressure dehumidifier is The dry compressed air enters the expander through the first control valve for expansion and cooling, and the dry air expanded to a certain pressure is exchanged with the concentrated solution by the gas-liquid heat exchanger to output the dry air of the required pressure;
步骤二：高压溶液除湿再生循环流程：高压除湿器中除湿之后的稀溶液进入高压储液罐，经第一节流阀节流后进入中间换热器加热后进入溶液加热器由热回收器回收余热产生的热水进一步加热，然后经稀溶液泵进入常压再生器，与风机送入的再生空气直接接触，稀溶液中的水分被空气吸收后变为浓溶液后进入浓溶液罐，然后进入中间换热器，经过第三控制阀由增压溶液泵加压后通过气液换热器与低温干燥空气换热冷却后进入高压除湿器，构成溶液除湿再生循环回路；Step 2: Dehumidification regeneration cycle of high-pressure solution: The dilute solution after dehumidification in the high-pressure dehumidifier enters the high-pressure liquid storage tank, after being throttled by the first throttle valve, enters the intermediate heat exchanger and enters the solution heater to be recovered by the heat recovery device. The hot water generated by the residual heat is further heated, and then pumped into the atmospheric pressure regenerator through the dilute solution pump, and directly contacted with the regeneration air sent by the fan. The moisture in the dilute solution is absorbed by the air and becomes a concentrated solution, then enters the concentrated solution tank, and then enters The intermediate heat exchanger is pressurized by the pressurized solution pump through the third control valve, and then exchanges heat with the low-temperature dry air through the gas-liquid heat exchanger to be cooled into a high-pressure dehumidifier to form a solution dehumidification regeneration loop;
步骤三：空压机余热热水流程：在热回收器中，与空压机出口的高温压缩空气换热产生的热水通过水泵驱动进入溶液加热器经第四控制阀返回热回收器完成循环。Step 3: Air compressor residual hot water flow process: In the heat recovery device, the hot water generated by the heat exchange between the high temperature compressed air at the outlet of the air compressor is driven by the water pump into the solution heater to return to the heat recovery device through the fourth control valve to complete the cycle. .
基于压缩空气等熵膨胀制冷原理，将干燥后的压缩空气膨胀至所需的压力，同时得到不同压力的干燥空气，利用产生的冷量对除湿溶液进行冷却降温，缩小除湿盲区，实 现深度除湿，满足不同干燥程度的要求；并可以回收膨胀功用于辅助空压机，提高系统能源利用率。Based on the isentropic expansion refrigeration principle of compressed air, the compressed air after drying is expanded to the required pressure, and the dry air of different pressure is obtained at the same time, and the dehumidification solution is cooled and cooled by the generated cooling amount to reduce the dehumidification dead zone. Deep dehumidification is now available to meet different drying requirements; and expansion work can be recovered for auxiliary air compressors to improve system energy efficiency.
有益效果：本发明提供的一种压力露点可调的压缩空气深度干燥装置及方法，相比现有技术具有以下优点：Advantageous Effects: The present invention provides a compressed air deep drying device and method with adjustable pressure dew point, which has the following advantages over the prior art:
1、在高压环境下对压缩空气进行液体除湿，可以获取深度干燥的压缩空气。将干燥后的压缩空气进行膨胀制冷，用来调节除湿溶液温度，可以获取不同压力露点的压缩空气，满足不同干燥程度的要求；1. Dehumidification of compressed air under high pressure environment can obtain deep dry compressed air. The dried compressed air is expanded and cooled to adjust the temperature of the dehumidification solution, and compressed air of different pressure dew points can be obtained to meet different drying requirements;
2、将压缩空气膨胀产生的冷量用于冷却除湿溶液，使得压缩空气干燥后的含湿量更小，缩小除湿盲区，提高了压缩空气的干燥效果；利用空压机余热产生的热水驱动溶液再生有效降低系统能耗；2. The cooling amount generated by the expansion of the compressed air is used to cool the dehumidification solution, so that the moisture content after the compressed air is dried is smaller, the dehumidification dead zone is reduced, the drying effect of the compressed air is improved, and the hot water generated by the residual heat of the air compressor is driven. Solution regeneration effectively reduces system energy consumption;
3、通过回收膨胀机产生的膨胀功，用于辅助空压机，提高系统能量利用效率。3. The expansion work generated by the recovery expander is used to assist the air compressor to improve the energy utilization efficiency of the system.
附图说明DRAWINGS
图1为本发明的装置示意图Figure 1 is a schematic view of the apparatus of the present invention
具体实施方式detailed description
下面结合附图对本发明作更进一步的说明。The present invention will be further described below in conjunction with the accompanying drawings.
如图1所示为一种压力露点可调的压缩空气深度干燥装置，其特征在于，包括压缩空气处理系统和溶液除湿再生循环系统。FIG. 1 shows a compressed air deep drying device with adjustable pressure dew point, characterized in that it comprises a compressed air treatment system and a solution dehumidification regeneration circulation system.
进一步的，所述压缩空气处理系统包括压缩空气处理组件包括空气进口1、空气压缩机2、热回收器3、空气冷却器4、储气罐5、高压除湿器6、第一控制阀7、膨胀机8、气液换热器9、干燥空气出口10和第二控制阀11；Further, the compressed air treatment system includes a compressed air treatment assembly including an air inlet 1, an air compressor 2, a heat recovery unit 3, an air cooler 4, a gas storage tank 5, a high pressure dehumidifier 6, a first control valve 7, An expander 8, a gas-liquid heat exchanger 9, a dry air outlet 10 and a second control valve 11;
空气压缩机2出口连接热回收器3第一输入端，热回收器3第一输出端通过空气冷却器4与储气罐5的进口连接，储气罐5出口与高压除湿器6的下侧进气口连接；高压除湿器6的上侧排气口经第一控制阀7连接膨胀机8进气口，膨胀机8出气口与气液换热器9第一输入端相连；The outlet of the air compressor 2 is connected to the first input end of the heat recovery unit 3, and the first output end of the heat recovery unit 3 is connected to the inlet of the gas storage tank 5 through the air cooler 4, and the outlet of the gas storage tank 5 and the lower side of the high pressure dehumidifier 6 The air inlet is connected; the upper exhaust port of the high-pressure dehumidifier 6 is connected to the air inlet of the expander 8 via the first control valve 7, and the air outlet of the expander 8 is connected to the first input end of the gas-liquid heat exchanger 9;
所述溶液除湿再生循环系统包括高压除湿器6、气液换热器9、第三控制阀12、增压溶液泵13、高压储液罐14、第一节流阀15、回热器16、溶液加热器17、稀溶液泵18、常压再生器19、风机20、浓溶液罐21、水泵22和第四控制阀23；The solution dehumidification regeneration cycle system comprises a high pressure dehumidifier 6, a gas liquid heat exchanger 9, a third control valve 12, a pressurized solution pump 13, a high pressure liquid storage tank 14, a first throttle valve 15, a regenerator 16, a solution heater 17, a dilute solution pump 18, a normal pressure regenerator 19, a fan 20, a concentrated solution tank 21, a water pump 22, and a fourth control valve 23;
高压除湿器6底端排液口连接高压储液罐14，高压储液罐14的出口依次经过第一节流阀15、回热器16连接溶液加热器17第一输入端，溶液加热器17第一输出端经稀 溶液泵18与常压再生器19的顶部喷淋器相连；常压再生器19的底部排液口连接浓溶液罐21，浓溶液罐21出口连接回热器16第二输入端，回热器16第二输出端依次经过第三控制阀12、高压溶液泵13连接溶液冷却器9第二输入端，溶液冷却器9第二输出端与增压除湿器6顶端进液口相连，其中热回收器3的第二输出端通过水泵21连接溶液加热器17第二输入端，溶液加热器17第二输出端经第四控制阀22与热回收器3第二输入端相连。The bottom end of the high-pressure dehumidifier 6 is connected to the high-pressure liquid storage tank 14, and the outlet of the high-pressure liquid storage tank 14 is sequentially connected to the first throttle valve 15 and the regenerator 16 to the first input end of the solution heater 17, and the solution heater 17 The first output is thin The solution pump 18 is connected to the top shower of the atmospheric pressure regenerator 19; the bottom discharge port of the atmospheric pressure regenerator 19 is connected to the concentrated solution tank 21, and the outlet of the concentrated solution tank 21 is connected to the second input end of the regenerator 16, the regenerator The second output end is connected to the second input end of the solution cooler 9 through the third control valve 12 and the high pressure solution pump 13, and the second output end of the solution cooler 9 is connected to the top inlet of the pressurized dehumidifier 6, wherein the heat recovery is performed. The second output of the device 3 is connected to the second input of the solution heater 17 via a water pump 21, and the second output of the solution heater 17 is connected to the second input of the heat recovery unit 3 via a fourth control valve 22.
进一步的，所述压缩空气处理系统和溶液除湿再生循环系统包括共用的空气压缩机2、热回收器3、空气冷却器4和及高压除湿器6。Further, the compressed air treatment system and the solution dehumidification regeneration cycle system include a shared air compressor 2, a heat recovery unit 3, an air cooler 4, and a high pressure dehumidifier 6.
进一步的，所述高压除湿器6内布置填料或中空纤维膜组件。Further, a packing or hollow fiber membrane module is disposed in the high pressure dehumidifier 6.
膨胀机8回收膨胀功用于辅助空气压缩机2，膨胀降温后的空气流出膨胀机8后经过换热器9对进入高压除湿器的除湿溶液进行冷却降温，实现深度除湿，缩小除湿盲区。The expansion machine 8 recovers the expansion work for the auxiliary air compressor 2. After the expansion and cooling air flows out of the expander 8, the dehumidification solution entering the high-pressure dehumidifier is cooled and cooled by the heat exchanger 9, thereby achieving deep dehumidification and reducing the dehumidification dead zone.
一种压力露点可调的压缩空气深度干燥方法，其特征在于，该方法包括压缩空气处理流程、高压溶液除湿再生循环流程和空压机余热热水流程；具体包括以下步骤：A compressed air deep drying method with adjustable pressure dew point, characterized in that the method comprises a compressed air treatment process, a high pressure solution dehumidification regeneration cycle process and an air compressor residual hot water process; specifically comprising the following steps:
步骤一：压缩空气处理流程：待处理空气由空气进口1进入空气压缩机2压缩后经热回收器3降温后进入空气冷却器4进一步冷却降温，然后经储气罐5进入高压除湿器6与进入除湿器的浓溶液通过填料直接接触或通过中空纤维膜间接进行热质交换获得干燥的压缩空气；Step 1: compressed air treatment process: the air to be treated enters the air compressor 2 from the air inlet 1 and is cooled by the heat recovery unit 3, then enters the air cooler 4 to further cool and cool, and then enters the high-pressure dehumidifier 6 through the gas storage tank 5 and The concentrated solution entering the dehumidifier is directly contacted by the filler or indirectly subjected to heat and mass exchange through the hollow fiber membrane to obtain dry compressed air;
当第一控制阀7关闭，第二控制阀11开启时，高压除湿器5出口的干燥的压缩空气经第二控制阀11直接输出；当第一控制阀7开启，第二控制阀11关闭时，高压除湿器6出口的干燥的压缩空气经第一控制阀7进入膨胀机8进行膨胀制冷，膨胀到一定压力的干燥空气经气液换热器9与浓溶液换热后输出所需压力的干燥空气；When the first control valve 7 is closed and the second control valve 11 is opened, the dry compressed air at the outlet of the high pressure dehumidifier 5 is directly output through the second control valve 11; when the first control valve 7 is opened and the second control valve 11 is closed The dry compressed air at the outlet of the high-pressure dehumidifier 6 enters the expander 8 through the first control valve 7 for expansion and cooling, and the dry air expanded to a certain pressure is exchanged with the concentrated solution by the gas-liquid heat exchanger 9 to output the required pressure. Dry air
步骤二：高压溶液除湿再生循环流程：高压除湿器6中除湿之后的稀溶液进入高压储液罐14，经第一节流阀15节流后进入中间换热器16加热后进入溶液加热器17由热回收器3回收余热产生的热水进一步加热，然后经稀溶液泵18进入常压再生器19，与风机20送入的再生空气直接接触，稀溶液中的水分被空气吸收后变为浓溶液后进入浓溶液罐21，然后进入中间换热器16，经过第三控制阀12由增压溶液泵13加压后通过气液换热器9与低温干燥空气换热冷却后进入高压除湿器6，构成溶液除湿再生循环回路；Step 2: High-pressure solution dehumidification regeneration cycle: The dilute solution after dehumidification in the high-pressure dehumidifier 6 enters the high-pressure liquid storage tank 14, is throttled by the first throttle valve 15, enters the intermediate heat exchanger 16 and is heated to enter the solution heater 17 The hot water generated by the waste heat recovered by the heat recovery unit 3 is further heated, and then enters the atmospheric pressure regenerator 19 via the dilute solution pump 18, and is directly in contact with the regeneration air sent from the blower 20, and the moisture in the diluted solution is absorbed by the air and becomes rich. After the solution enters the concentrated solution tank 21, and then enters the intermediate heat exchanger 16, and is pressurized by the pressurized solution pump 13 through the third control valve 12, and then exchanges heat with the low-temperature dry air through the gas-liquid heat exchanger 9 to enter the high-pressure dehumidifier. 6, constitute a solution dehumidification regeneration cycle;
步骤三：空压机余热热水流程：在热回收器3中，与空压机2出口的高温压缩空气 换热产生的热水通过水泵驱动进入溶液加热器17经第四控制阀返回热回收器3完成循环。Step 3: Air compressor residual hot water flow process: in the heat recovery unit 3, with the high temperature compressed air at the outlet of the air compressor 2 The hot water generated by the heat exchange is driven by the water pump into the solution heater 17 and returned to the heat recovery unit 3 via the fourth control valve to complete the cycle.
本发明的除湿过程在高压除湿器6内进行，空气与溶液表面水蒸气分压力差增大，可获得更加干燥的空气。经高压除湿器6干燥后的压缩空气通过膨胀机8膨胀至不同压力，从而可以提供不同压力的干燥空气；产生的冷量用于冷却除湿溶液，缩小除湿盲区，增强除湿效果，实现深度除湿，满足不同干燥程度的要求；同时回收膨胀功用于辅助压缩空气2，提高能源利用率。The dehumidification process of the present invention is carried out in the high pressure dehumidifier 6, and the difference in water vapor pressure between the air and the solution surface is increased to obtain a more dry air. The compressed air dried by the high-pressure dehumidifier 6 is expanded by the expander 8 to different pressures, thereby providing dry air of different pressures; the generated cooling amount is used for cooling the dehumidification solution, reducing the dehumidification dead zone, enhancing the dehumidification effect, and achieving deep dehumidification, Meet different drying requirements; at the same time, recover expansion work to assist compressed air 2, improve energy efficiency.
以上所述仅是本发明的优选实施方式，应当指出：对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。 The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

Claims (5)

  1. 一种压力露点可调的压缩空气深度干燥装置，其特征在于，包括压缩空气处理系统和溶液除湿再生循环系统。A compressed air deep drying device with adjustable pressure dew point is characterized by comprising a compressed air treatment system and a solution dehumidification regeneration circulation system.
  2. 如权利要求1所述的所述的一种压力露点可调的压缩空气深度干燥装置，其特征在于，所述压缩空气处理系统包括压缩空气处理组件包括空气进口(1)、空气压缩机(2)、热回收器(3)、空气冷却器(4)、储气罐(5)、高压除湿器(6)、第一控制阀(7)、膨胀机(8)、气液换热器(9)、干燥空气出口(10)和第二控制阀(11)；A pressure dew point adjustable compressed air deep drying apparatus according to claim 1 wherein said compressed air treatment system comprises a compressed air treatment assembly comprising an air inlet (1) and an air compressor (2) ), heat recovery unit (3), air cooler (4), gas storage tank (5), high pressure dehumidifier (6), first control valve (7), expander (8), gas-liquid heat exchanger ( 9), a dry air outlet (10) and a second control valve (11);
    空气压缩机(2)出口连接热回收器(3)第一输入端，热回收器(3)第一输出端通过空气冷却器(4)与储气罐(5)的进口连接，储气罐(5)出口与高压除湿器(6)的下侧进气口连接；高压除湿器(6)的上侧排气口经第一控制阀(7)连接膨胀机(8)进气口，膨胀机(8)出气口与气液换热器(9)第一输入端相连；The air compressor (2) outlet is connected to the first input end of the heat recovery device (3), and the first output end of the heat recovery device (3) is connected to the inlet of the gas storage tank (5) through an air cooler (4), the gas storage tank (5) The outlet is connected to the lower air inlet of the high pressure dehumidifier (6); the upper exhaust port of the high pressure dehumidifier (6) is connected to the air inlet of the expander (8) through the first control valve (7), and is expanded. The outlet of the machine (8) is connected to the first input end of the gas-liquid heat exchanger (9);
    所述溶液除湿再生循环系统包括高压除湿器(6)、气液换热器(9)、第三控制阀(12)、增压溶液泵(13)、高压储液罐(14)、第一节流阀(15)、回热器(16)、溶液加热器(17)、稀溶液泵(18)、常压再生器(19)、风机(20)、浓溶液罐(21)、水泵(22)和第四控制阀(23)；The solution dehumidification regeneration circulation system comprises a high pressure dehumidifier (6), a gas liquid heat exchanger (9), a third control valve (12), a pressurized solution pump (13), a high pressure liquid storage tank (14), and a first Throttle valve (15), regenerator (16), solution heater (17), dilute solution pump (18), atmospheric pressure regenerator (19), fan (20), concentrated solution tank (21), water pump ( 22) and a fourth control valve (23);
    高压除湿器(6)底端排液口连接高压储液罐(14)，高压储液罐(14)的出口依次经过第一节流阀(15)、回热器(16)连接溶液加热器(17)第一输入端，溶液加热器(17)第一输出端经稀溶液泵(18)与常压再生器(19)的顶部喷淋器相连；常压再生器(19)的底部排液口连接浓溶液罐(21)，浓溶液罐(21)出口连接回热器(16)第二输入端，回热器(16)第二输出端依次经过第三控制阀(12)、高压溶液泵(13)连接溶液冷却器(9)第二输入端，溶液冷却器(9)第二输出端与增压除湿器(6)顶端进液口相连，其中热回收器(3)的第二输出端通过水泵(21)连接溶液加热器(17)第二输入端，溶液加热器(17)第二输出端经第四控制阀(22)与热回收器(3)第二输入端相连。The bottom end of the high-pressure dehumidifier (6) is connected to the high-pressure liquid storage tank (14), and the outlet of the high-pressure liquid storage tank (14) is sequentially connected to the solution heater through the first throttle valve (15) and the regenerator (16). (17) At the first input end, the first output end of the solution heater (17) is connected to the top shower of the atmospheric pressure regenerator (19) via a dilute solution pump (18); the bottom row of the atmospheric pressure regenerator (19) The liquid port is connected to the concentrated solution tank (21), the outlet of the concentrated solution tank (21) is connected to the second input end of the regenerator (16), and the second output end of the regenerator (16) is sequentially passed through the third control valve (12), high pressure The solution pump (13) is connected to the second input end of the solution cooler (9), and the second output end of the solution cooler (9) is connected to the top inlet of the pressurized dehumidifier (6), wherein the heat recovery device (3) is The second output is connected to the second input end of the solution heater (17) via a water pump (21), and the second output end of the solution heater (17) is connected to the second input end of the heat recovery unit (3) via a fourth control valve (22). .
  3. 如权利要求2所述的一种压力露点可调的压缩空气深度干燥装置，其特征在于，所述压缩空气处理系统和溶液除湿再生循环系统包括共用的空气压缩机(2)、热回收器(3)、空气冷却器(4)和高压除湿器(6)。A pressure dew point adjustable compressed air deep drying apparatus according to claim 2, wherein said compressed air treatment system and solution dehumidification regeneration circulation system comprise a shared air compressor (2) and a heat recovery unit ( 3), air cooler (4) and high pressure dehumidifier (6).
  4. 如权利要求2所述的一种压力露点可调的压缩空气深度干燥装置，其特征在于，所述高压除湿器(6)内布置填料或中空纤维膜组件。A pressure dew point adjustable compressed air deep drying apparatus according to claim 2, wherein a packing or hollow fiber membrane module is disposed in said high pressure dehumidifier (6).
  5. 一种压力露点可调的压缩空气深度干燥方法，其特征在于，该方法包括压缩空 气处理流程、高压溶液除湿再生循环流程和空压机余热热水流程；具体包括以下步骤：A compressed air deep drying method with adjustable pressure dew point, characterized in that the method comprises compressing empty The gas treatment process, the high pressure solution dehumidification regeneration cycle process and the air compressor residual hot water process; specifically comprising the following steps:
    1)压缩空气处理流程：待处理空气由空气进口(1)进入空气压缩机(2)压缩后经热回收器(3)降温后进入空气冷却器(4)进一步冷却降温，然后经储气罐(5)进入高压除湿器(6)与进入除湿器的浓溶液通过填料直接接触或通过中空纤维膜间接进行热质交换获得干燥的压缩空气；1) Compressed air treatment process: the air to be treated is introduced into the air compressor by the air inlet (1) (2), compressed by the heat recovery unit (3), and then cooled into the air cooler (4) for further cooling and cooling, and then through the gas storage tank. (5) obtaining a dry compressed air by entering a high pressure dehumidifier (6) and a concentrated solution entering the dehumidifier through direct contact with the filler or indirect heat exchange with the hollow fiber membrane;
    当第一控制阀(7)关闭，第二控制阀(11)开启时，高压除湿器(5)出口的干燥的压缩空气经第二控制阀(11)直接输出；当第一控制阀(7)开启，第二控制阀(11)关闭时，高压除湿器(6)出口的干燥的压缩空气经第一控制阀(7)进入膨胀机(8)进行膨胀制冷，膨胀到一定压力的干燥空气经气液换热器(9)与浓溶液换热后输出所需压力的干燥空气；When the first control valve (7) is closed and the second control valve (11) is opened, the dry compressed air at the outlet of the high pressure dehumidifier (5) is directly output through the second control valve (11); when the first control valve (7) When the second control valve (11) is closed, the dry compressed air at the outlet of the high-pressure dehumidifier (6) enters the expander (8) through the first control valve (7) for expansion and cooling, and expands to a certain pressure of dry air. After the heat exchange between the gas-liquid heat exchanger (9) and the concentrated solution, the dry air of the required pressure is output;
    2)高压溶液除湿再生循环流程：高压除湿器(6)中除湿之后的稀溶液进入高压储液罐(14)，经第一节流阀(15)节流后进入中间换热器(16)加热后进入溶液加热器(17)由热回收器(3)回收余热产生的热水进一步加热，然后经稀溶液泵(18)进入常压再生器(19)，与风机(20)送入的再生空气直接接触，稀溶液中的水分被空气吸收后变为浓溶液后进入浓溶液罐(21)，然后进入中间换热器(16)，经过第三控制阀(12)由增压溶液泵(13)加压后通过气液换热器(9)与低温干燥空气换热冷却后进入高压除湿器(6)，构成溶液除湿再生循环回路；2) High-pressure solution dehumidification regeneration cycle: The dilute solution after dehumidification in the high-pressure dehumidifier (6) enters the high-pressure liquid storage tank (14), and is throttled by the first throttle valve (15) to enter the intermediate heat exchanger (16) After heating, the solution heater (17) is further heated by the hot water generated by the heat recovery device (3), and then introduced into the atmospheric pressure regenerator (19) via the dilute solution pump (18), and sent to the fan (20). The regenerative air is in direct contact, the moisture in the dilute solution is absorbed by the air and becomes a concentrated solution, then enters the concentrated solution tank (21), and then enters the intermediate heat exchanger (16), and passes through the third control valve (12) from the pressurized solution pump. (13) After being pressurized, it is cooled by heat exchange between the gas-liquid heat exchanger (9) and the low-temperature drying air, and then enters the high-pressure dehumidifier (6) to form a solution dehumidification regeneration loop;
    3)空压机余热热水流程：在热回收器(3)中，与空压机(2)出口的高温压缩空气换热产生的热水通过水泵驱动进入溶液加热器(17)经第四控制阀返回热回收器(3)完成循环。 3) Air compressor residual hot water flow process: In the heat recovery unit (3), the hot water generated by the heat exchange with the high temperature compressed air at the outlet of the air compressor (2) is driven by the water pump into the solution heater (17) via the fourth The control valve returns to the heat recovery unit (3) to complete the cycle.
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