CN-121971948-A - Cooling system and cooling method for solid temperature swing adsorption reactor

CN121971948ACN 121971948 ACN121971948 ACN 121971948ACN-121971948-A

Abstract

The invention provides a cooling system and a cooling method for a solid temperature swing adsorption reactor, wherein the system comprises a cold dryer, a separator and the temperature swing adsorption reactor, an inlet of the cold dryer is communicated with an air source, an outlet of the cold dryer is connected with an air inlet of the separator, the cold dryer is used for deeply removing water and pre-cooling the entering air and then conveying the entering air to the separator, an air outlet of the separator is communicated with the air inlet of the temperature swing adsorption reactor through an air direct-blowing pipeline, and the separator is used for separating liquid water mist and tiny impurities in the entering cold air and then conveying the separated liquid water mist and tiny impurities to the temperature swing adsorption reactor for cooling. On the basis of guaranteeing the high efficiency of air belly cooling, the system realizes deep water removal and pre-cooling of air, avoids the damage of moisture to the performance of the adsorbent, and realizes the high efficiency and safe cooling of the adsorbent.

Inventors

ZHU YUHUI
LI QIUNAN
ZHOU JIALIANG
YANG GANG
WANG SIYUAN
WU XUN
LEI SIYUAN
Cheng Huanyang
CHEN BAOKANG
TANG RONGFU
ZHAO LIJUAN
KONG XIANGZHEN

Assignees

华能重庆珞璜发电有限责任公司
西安热工研究院有限公司

Dates

Publication Date: 20260505
Application Date: 20260116

Claims (10)

1. A cooling system for a solid temperature swing adsorption reactor, which is characterized by comprising a cold dryer, a separator and a temperature swing adsorption reactor; the inlet of the cold dryer is used for being communicated with an air source, and the air outlet of the cold dryer is connected with the air inlet of the separator, wherein the cold dryer is used for deeply dewatering and pre-cooling the entering air and then conveying the air to the separator; the air outlet of the separator is communicated with the air inlet of the temperature swing adsorption reactor through an air direct blowing pipeline, wherein the separator is used for separating liquid water mist and tiny impurities in the entering cold air and then conveying the separated liquid water mist and tiny impurities to the temperature swing adsorption reactor for cooling.
2. The system of claim 1, wherein the temperature swing adsorption reactor is provided with a temperature sensor; The temperature sensor is used for monitoring the temperature of the adsorbent in the temperature swing adsorption reactor in real time.
3. The system of claim 1, wherein the temperature swing adsorption reactor is provided with a humidity sensor; the humidity sensor is used for monitoring the humidity of the blow-through air entering the temperature swing adsorption reactor in real time.
4. A system according to any one of claims 1 to 3, further comprising a water collecting device; The inlet of the water collecting device is respectively connected with the water outlet of the cold dryer and the sewage outlet of the separator.
5. A system according to any one of claims 1 to 3, further comprising a pressure regulating valve; The pressure regulating valve is arranged on the air direct-blowing pipeline.
6. A system according to any one of claims 1 to 3, further comprising a flow regulating valve; The flow regulating valve is arranged at the position, close to the air inlet of the temperature swing adsorption reactor, of the air blowback pipeline.
7. A cooling method for a solid temperature swing adsorption reactor, characterized in that the cooling system for a solid temperature swing adsorption reactor according to any one of claims 1 to 6 is employed, the method comprising: Conveying air in an air source to the cold dryer, and deeply dehydrating and pre-cooling the entering air through the cold dryer to obtain dry cold air; the dry cold air is conveyed to the separator, and liquid water mist and tiny impurities in the cold air are separated under the centrifugal force action of the separator, so that dry and clean cold air is obtained; And the dry and clean cold air is conveyed to the temperature swing adsorption reactor through the air blowback pipeline, and the dry and clean cold air is in direct contact with the high-temperature adsorbent in the temperature swing adsorption reactor for heat exchange so as to cool the temperature swing adsorption reactor.
8. The method of claim 7, wherein during cooling of the temperature swing adsorption reactor, the method further comprises: In the cooling process, the temperature of the adsorbent in the temperature swing adsorption reactor and the humidity of the direct-blowing air are monitored in real time through a temperature sensor and a humidity sensor respectively.
9. The method of claim 8, wherein during cooling of the temperature swing adsorption reactor, the method further comprises: When the temperature of the adsorbent is monitored to be reduced to a preset temperature threshold, closing an air source, the cold dryer and the separator, and ending the cooling process of the temperature swing adsorption reactor; When the humidity of the direct-blowing air exceeds the preset humidity threshold value, the refrigeration parameters of the cold dryer are adjusted to meet the requirement of air dryness.
10. The method of claim 7, wherein the method further comprises: the liquid water formed by cooling and condensing the air entering the cold dryer enters a water collecting device through a water outlet of the cold dryer; after the liquid water mist and the tiny impurities in the cold air are separated by the separator, the separated liquid water and tiny impurities enter the water collecting device through the sewage outlet of the separator.

Description

Cooling system and cooling method for solid temperature swing adsorption reactor Technical Field The invention belongs to the technical field of temperature swing adsorption, and particularly relates to a cooling system and a cooling method for a solid temperature swing adsorption reactor. Background The temperature swing adsorption (Temperature Swing Adsorption, TSA) process is used as a high-efficiency separation and purification technology and is widely applied to various industrial fields such as gas separation, wastewater treatment, air purification and the like. The core principle of the process is that the separation of target substances and the regeneration and reuse of the adsorbent are realized through the cyclic process of low-temperature adsorption-temperature rising desorption by utilizing the remarkable difference of the adsorption capacities of the adsorbent at different temperatures. After the adsorbent is saturated, the adsorbent is removed through a temperature rising desorption process to recover the adsorption performance, and after the desorption is completed, the adsorbent in the adsorption reactor is cooled to a preset low-temperature adsorption temperature window to enter the next adsorption cycle, so that the cycle period, the treatment efficiency and the operation cost of the whole temperature swing adsorption process are directly determined by the efficiency and the reliability of the cooling process. In the prior art, the cooling mode of the temperature swing adsorption reactor is mainly divided into two types, namely a traditional indirect cooling process, cooling medium (such as cooling water and cooling oil) is introduced through a reactor jacket, and the temperature of the adsorbent is reduced by utilizing heat conduction. However, the method has the inherent defects of low heat transfer efficiency and low cooling rate, so that the cooling process consumes longer time, the cycle period of the whole TSA process is greatly prolonged, the treatment capacity of equipment is reduced, and meanwhile, the indirect cooling needs to be matched with a complex jacket heat exchange system, so that the equipment investment and the operation and maintenance cost are higher. The other type is an air direct-blowing cooling process, which utilizes normal-temperature air to be directly communicated into a reactor for direct contact heat exchange with an adsorbent, and the cooling efficiency is obviously improved by virtue of strong fluidity and large contact area of the air, so that the cooling time is shortened, complicated heat exchange equipment is not needed, and the equipment cost and the operation energy consumption are lower, so that the air direct-blowing cooling process gradually becomes a preferred scheme in the industry. However, the air blowthrough cooling process has the key technical bottlenecks that air in the nature usually contains a certain amount of water vapor, and most low-temperature adsorbents (such as molecular sieves, activated carbon, potassium carbonate and the like) have extremely strong adsorptivity to water, if the moisture-containing air is directly introduced into the reactor, the water vapor can be preferentially adsorbed by the low-temperature adsorbents, so that on one hand, the effective adsorption sites of the adsorbents can be occupied, the adsorption capacity of the adsorbents to target adsorbents is greatly reduced, and the treatment effect of the subsequent adsorption process is seriously affected, and on the other hand, the adsorbents can undergo phase change, agglomeration or performance degradation after adsorbing the water, so that the service life of the adsorbents is shortened, and the running cost of the process is increased. In order to solve the problem of air moisture, a simple dehumidification device (such as a dehumidification bag and a simple filter) is tried to pretreat the air in the prior art, but the dehumidification efficiency of the device is low, water vapor in the air cannot be reduced to a range meeting the requirement of a low-temperature adsorbent, and meanwhile, the partial pretreatment mode cannot realize air cooling synchronously, and the introduced normal-temperature air still needs to exchange a large amount of heat with the adsorbent, so that the cooling efficiency is reduced to a certain extent. Therefore, how to realize deep water removal and pre-cooling of air on the basis of ensuring the high efficiency of air belly cooling, and avoid the damage of moisture to the performance of the adsorbent becomes a technical problem to be solved urgently in the current temperature swing adsorption reactor cooling process. Disclosure of Invention The invention aims to at least solve one of the technical problems in the prior art and provides a cooling system and a cooling method for a solid temperature swing adsorption reactor. One aspect of the present invention provides a cooling system for a solid temperature swing adsorption react