Compressed air dechlorination device, dechlorination system and usage method of dechlorination system

Abstract

The present invention discloses a compressed air dechlorination device, a dechlorination system and a usage method of the dechlorination system, which relates to the technical field of compressed air energy storage. Among them, the compressed air dechlorination device includes an adsorbent, a cage and an adsorption tank. The adsorbent includes a plurality of adsorption layers arranged continuously or at intervals along the axial direction of itself. The adsorption layer includes an activated carbon bonding layer and an activated coke bonding layer, and the adsorption layers at both ends of the adsorbent are both activated coke bonding layers. Two cages are respectively abutted against the activated coke bonding layers at both ends of the adsorbent. The air inlet of the adsorption tank is used to be connected to the air outlet of the salt cavern through a pipeline, and the air outlet of the adsorption tank is used to be connected to the air inlet of the compressed air power generation system through a pipeline. One cage is located between the air inlet of the adsorption tank and the adsorbent, and the other cage is located between the air outlet of the adsorption tank and the adsorbent. Compared with the prior art, the technical solution of the present invention can solve the problem that chlorine in the compressed air corrodes the compressed air power generation system.

Description

Technical Field

[0001] The present invention relates to the technical field of compressed air energy storage, and particularly to a compressed air dechlorination device, a dechlorination system and a method for using the dechlorination system. Background Art

[0002] Compressed air energy storage has the advantages of large energy storage capacity, long energy storage cycle, small specific investment, etc., and is considered to be one of the large-scale energy storage technologies with the broadest development prospects. Salt rock has high tightness and a large space, which is suitable for large-scale storage of compressed air. Moreover, when the internal air pressure changes, the salt cavern wall will produce slight deformation to balance the pressure, and this deformation is reversible within a certain range and will not cause damage to the salt cavern structure, having a certain degree of safety.

[0003] Salt rock contains a large amount of sodium chloride. Since sodium chloride is a strong electrolyte, it is easily dissociated into sodium ions and chloride ions in the presence of water molecules. When compressed air is stored in a salt cavern, it will come into contact with these microenvironments containing chloride ions, resulting in the compressed air containing chloride ions. These compressed air containing chloride ions will corrode the heat exchange tubes of the heat exchanger, the fins of the expander and other components of the compressed air power generation system during the release process, shortening the service life of the equipment. Summary of the Invention

[0004] The purpose of the present invention is to provide a compressed air dechlorination device, a dechlorination system and a method for using the dechlorination system to solve the problem that chlorine in compressed air corrodes the compressed air power generation system.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The present invention discloses a compressed air dechlorination device, including:

[0007] An adsorbent, the adsorbent includes a plurality of adsorption layers arranged continuously or at intervals along the axis of itself, the adsorption layer includes an activated carbon bonding layer and an activated coke bonding layer, and the adsorption layers at both ends of the adsorbent are both the activated coke bonding layers;

[0008] A cage, the number of the cages is two, and the two cages respectively abut against the activated coke bonding layers at both ends of the adsorbent;

[0009] An adsorption tank, the air inlet of the adsorption tank is used to be connected to the air outlet of the salt cavern through a pipeline, and the air outlet of the adsorption tank is used to be connected to the air inlet of the compressed air power generation system through a pipeline; the adsorbent and the cage are both located in the adsorption tank; one cage is located between the air inlet of the adsorption tank and the adsorbent, and the other cage is located between the air outlet of the adsorption tank and the adsorbent.

[0010] Preferably, a reinforcing circular hoop is fixed to the outside of the adsorption tank.

[0011] Preferably, the cage includes a conical cover and a connecting frame, and the connecting frame connects the conical cover and the adsorption tank respectively; the tip of the conical cover faces away from the adsorbent, and the activated coke bonding layer in contact with the conical cover has a conical surface adapted to the inner side surface of the conical cover.

[0012] The present invention also discloses a compressed air dechlorination system, which includes the above-mentioned compressed air dechlorination device, and also includes a scrubbing tower, a vent chimney, an alkali solution tank and a collection pool; the air outlet of the adsorption tank is connected to the air inlet of the scrubbing tower through a pipeline for releasing the chlorine-containing gas adsorbed by the adsorbent to the scrubbing tower; the liquid outlet of the alkali solution tank is connected to the liquid inlet of the scrubbing tower through a pipeline for supplying alkali solution to the scrubbing tower; the scrubbing tower is used for spraying alkali solution on the chlorine-containing gas; the air outlet of the scrubbing tower is connected to the vent chimney through a pipeline for discharging the gas after spraying treatment; the collection pool is used for collecting the alkali solution after spraying treatment.

[0013] Preferably, the compressed air dechlorination system further includes a filter for filtering the compressed air after dechlorination treatment again; the air inlet of the filter is connected to the air outlet of the adsorption tank through a pipeline, and the air outlet of the filter is used to be connected to the air inlet of the compressed air power generation system through a pipeline.

[0014] Preferably, the number of the filters is multiple, and the multiple filters are arranged in parallel to make the filtering process of the dechlorinated compressed air continuous by means of alternating maintenance.

[0015] Preferably, the number of the compressed air dechlorination devices is multiple, so that the process of dechlorinating the compressed air by the compressed air dechlorination device is continuous by means of alternately releasing the chlorine-containing gas to the scrubbing tower.

[0016] The present invention also discloses a method for using a compressed air dechlorination system, which uses the above-mentioned compressed air dechlorination system, and includes the following steps:

[0017] Monitor the pressure difference at both ends of the adsorbent to obtain a measured pressure difference, and compare the measured pressure difference with a preset stop absorption pressure difference and a stop release pressure difference respectively;

[0018] When the measured differential pressure is higher than the stop absorption differential pressure, interrupt the connection between the air inlet of the compressed air dechlorination device and the air outlet of the salt cavern, and interrupt the connection between the air outlet of the compressed air dechlorination device and the air inlet of the compressed air power generation system; open the connection between the air outlet of the compressed air dechlorination device and the air inlet of the scrubbing tower, and open the connection between the liquid outlet of the lye tank and the liquid inlet of the scrubbing tower.

[0019] When the measured differential pressure is lower than the stop release differential pressure, open the connection between the air inlet of the compressed air dechlorination device and the air outlet of the salt cavern, and open the connection between the air outlet of the compressed air dechlorination device and the air inlet of the compressed air power generation system; interrupt the connection between the air outlet of the compressed air dechlorination device and the air inlet of the scrubbing tower, and interrupt the connection between the liquid outlet of the lye tank and the liquid inlet of the scrubbing tower.

[0020] Preferably, the method for using the compressed air dechlorination system further includes the following steps:

[0021] Monitor the chlorine content at the air outlet of the adsorption tank to obtain a first chlorine content, and compare the first chlorine content with a preset first control content;

[0022] When the first chlorine content is higher than the first control content, reduce the valve opening of the pipeline between the air inlet of the compressed air dechlorination device and the air outlet of the salt cavern.

[0023] Preferably, the method for using the compressed air dechlorination system further includes the following steps:

[0024] After opening the connection between the air outlet of the compressed air dechlorination device and the air inlet of the scrubbing tower, gradually increase the valve opening of the pipeline between the air outlet of the compressed air dechlorination device and the air inlet of the scrubbing tower.

[0025] The present invention has achieved the following technical effects compared with the related art:

[0026] Before the compressed air discharged from the salt cavern enters the compressed air power generation system, it first passes through the adsorbent in the adsorption tank, and the adsorbent adsorbs the chlorine in the compressed air, thereby reducing the chlorine content in the compressed air, reducing the corrosion of the compressed air power generation system, and extending the service life of the compressed air power generation system. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the related art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 This is a schematic diagram of the compressed air dechlorination system according to an embodiment of the present invention.

[0029] In the figure: 100 - compressed air dechlorination system; 110 - compressed air dechlorination device; 111 - adsorbent; 112 - cage; 113 - adsorption tank; 114 - reinforcing hoop; 1111 - activated carbon bonding layer; 1112 - activated coke bonding layer; 1121 - conical cover; 1122 - connecting frame; 120 - scrubbing tower; 130 - vent chimney; 140 - lye tank; 150 - collection pool; 160 - filter; 170 - sensor group; 180 - valve group; 1710 - differential pressure sensor; 1711 - chlorine content sensor after adsorption; 1712 - chlorine content sensor after spraying; 1713 - pressure sensor after adsorption; 1714 - salt cave outlet flow sensor; 1715 - chlorine content sensor before adsorption; 1716 - temperature sensor before adsorption; 1717 - temperature sensor after adsorption; 1718 - lye flow sensor; 1719 - pH sensor; 1720 - pressure sensor before adsorption; 181 - second cut-off valve; 182 - third cut-off valve; 183 - fourth cut-off valve; 184 - flow regulating valve before adsorption; 185 - lye flow regulating valve; 186 - flow regulating valve during regeneration process; 187 - fifth cut-off valve; 188 - first cut-off valve; 200 - salt cave. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0031] The purpose of the present invention is to provide a compressed air dechlorination device, a dechlorination system and a method for using the dechlorination system, which are used to solve the problem that chlorine in compressed air corrodes the compressed air power generation system.

[0032] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners. In this application, "dechlorination" refers to removing chloride ions.

[0033] Referring to Figure 1 , this embodiment provides a compressed air dechlorination device 110, which includes an adsorbent 111, a cage 112 and an adsorption tank 113.

[0034] The adsorbent 111 includes a plurality of adsorption layers arranged continuously or at intervals along its own axis direction. The adsorption layer includes an activated carbon bonding layer 1111 and an activated coke bonding layer 1112. The adsorption layers at both ends of the adsorbent 111 are both activated coke bonding layers 1112.

[0035] The number of cages 112 is two, and the two cages 112 respectively abut against the activated coke bonding layers 1112 at both ends of the adsorbent 111.

[0036] The air inlet of the adsorption tank 113 is used to communicate with the air outlet of the salt cavern 200 through a pipeline, and the air outlet of the adsorption tank 113 is used to communicate with the air inlet of the compressed air power generation system through a pipeline. Both the adsorbent 111 and the cage 112 are located inside the adsorption tank 113. One cage 112 is located between the air inlet of the adsorption tank 113 and the adsorbent 111, and the other cage 112 is located between the air outlet of the adsorption tank 113 and the adsorbent 111.

[0037] The working principle of the compressed air dechlorination device 110 in this embodiment is as follows:

[0038] Before the compressed air discharged from the salt cavern 200 enters the compressed air power generation system, it first passes through the adsorbent 111 in the adsorption tank 113, and the adsorbent 111 adsorbs the chlorine in the compressed air, thereby reducing the chlorine content in the compressed air, reducing the corrosion of the compressed air power generation system, and extending the service life of the compressed air power generation system.

[0039] Activated carbon has a relatively high specific surface area and good adsorption performance. Through experiments, in an environment of about 1 MPa, activated carbon has good selective adsorption performance for chloride ions in the gas in the salt cavern 200, and can reach more than 95%. However, due to the developed pore structure of activated carbon, its hardness is relatively low, and activated carbon is easily crushed when subjected to external extrusion or friction. Especially some powdered activated carbon, which has small particles and lower hardness itself.

[0040] Therefore, activated carbon is generally used for the adsorption treatment of gas in an environment of about 1 MPa. The air pressure of the compressed air discharged from the salt cavern 200 is generally 10 MPa - 15 MPa, and activated carbon is easily scattered under the impact of compressed air and is not easy to maintain integrity.

[0041] In this embodiment, activated carbon particles are bonded into an activated carbon bonding layer 1111 through an adhesive to improve its impact resistance. At the same time, activated coke bonding layers 1112 are arranged at both ends of the adsorbent 111 to further improve the impact resistance.

[0042] Activated coke is generally made from coal through processes such as high-temperature dry distillation. Its structure is relatively dense compared to activated carbon, so its adsorption effect is weaker than that of activated carbon. When used as a gas adsorbent, activated coke is usually used for the dry desulfurization and denitrification treatment of industrial flue gas.

[0043] In this embodiment, the adsorption layers at both ends of the adsorbent 111 are both set as activated coke bonding layers 1112. On the one hand, the adsorption property of the activated coke bonding layer 1112 is utilized to adsorb chlorine in the compressed air. On the other hand, the mechanical strength of activated coke is superior to that of activated carbon, and it is not easily dispersed under the impact of air flow. By combining the activated carbon bonding layer 1111 and the activated coke bonding layer 1112, the adsorbent 111 in this embodiment not only has the strong adsorption property provided by activated carbon but also has the strong hardness provided by activated coke to solve the problem of dechlorination of compressed air.

[0044] As a possible example, in this embodiment, each adsorption layer is wrapped in a wire cage, and the wire cage is fixed on the inner wall of the adsorption tank 113 to achieve the positioning of the adsorption layer. It is preferable to leave a certain gap, such as a gap of 10 mm to 60 mm, between adjacent wire cages to block the transmission of force between adjacent wire cages.

[0045] As a possible example, in this embodiment, hard-based anthracite coal is selected as the activated carbon. The activated coke combines hard coal-based coke and petroleum coke to increase its specific surface area and the number of micropores, so that the iodine value of the activated coke is increased to between 1200 and 1500, and the specific surface area reaches more than 2600 m 2 / g.

[0046] The cage 112 is a bracket that can pass air flow and is used to limit the end position of the adsorbent 111. The inner wall of the adsorption tank 113 is used to contact the side surface of the adsorbent 111 to maintain the side profile of the adsorbent 111. By respectively arranging cages 112 at both ends of the adsorbent 111 and combining with the generally columnar annular inner wall provided by the adsorption tank 113, the adsorbent 111 can better maintain its own shape under the impact of air flow.

[0047] Compared with the activated carbon bonding layer 1111, the activated coke bonding layer 1112 has better structural stability, so it is more suitable to be arranged adjacent to the cage 112 to bear the pressure of the cage 112.

[0048] In addition to the limiting effect on the adsorbent 111, the cage 112 near the air inlet of the adsorption tank 113 can also play a role in dispersing the air flow, so that the adjacent activated coke bonding layer 1112 bears the air flow impact more evenly.

[0049] As a possible example, in this embodiment, a reinforcing circular hoop 114 is fixed on the outside of the adsorption tank 113. It is preferable to set multiple reinforcing circular hoops 114, and at least distribute them on the outside of the section of the adsorption tank 113 corresponding to the adsorbent 111.

[0050] As a possible example, in this embodiment, the cage 112 includes a conical cover 1121 and a connecting frame 1122. The connecting frame 1122 is respectively connected to the conical cover 1121 and the adsorption tank 113. The tip of the conical cover 1121 faces away from the adsorbent 111, and the activated coke bonding layer 1112 that fits the conical cover 1121 has a conical surface adapted to the inner side surface of the conical cover 1121.

[0051] The conical structure is relatively stable and can better maintain the shape of the adsorbent 111. In addition, the tip of the conical cover 1121 near the air inlet of the adsorption tank 113 can also play a role in breaking the wind, so as to make the compressed air disperse evenly.

[0052] Exemplarily, the connecting frame 1122 includes a central ring and diagonal braces. The central ring is sleeved outside the conical cover 1121, and the two ends of the diagonal braces are respectively connected to the central ring and the adsorption tank 113. The diagonal braces are inclined with respect to the axis of the adsorption tank 113 and are used to apply a pressure to the central ring to press it against the conical cover 1121. The number of diagonal braces is more than three and is evenly distributed along the circumferential direction with the axis of the adsorption tank 113 as the center, so that the central ring is evenly stressed.

[0053] Referring to Figure 1 , this embodiment further provides a compressed air dechlorination system 100, which includes the above-mentioned compressed air dechlorination device 110, and also includes a scrubbing tower 120, a vent chimney 130, an alkali solution tank 140, and a collection pool 150. The air outlet of the adsorption tank 113 is connected to the air inlet of the scrubbing tower 120 through a pipeline, and is used to release the chlorine-containing gas adsorbed by the adsorbent 111 to the scrubbing tower 120. The liquid outlet of the alkali solution tank 140 is connected to the liquid inlet of the scrubbing tower 120 through a pipeline, and is used to supply alkali solution to the scrubbing tower 120. The scrubbing tower 120 is used to spray alkali solution on the chlorine-containing gas. The air outlet of the scrubbing tower 120 is connected to the vent chimney 130 through a pipeline, and is used to evacuate the gas after spraying treatment. The collection pool 150 is used to collect the alkali solution after the spraying treatment is completed.

[0054] The working principle of the compressed air dechlorination system 100 in this embodiment is as follows:

[0055] As the adsorption capacity of adsorbent 111 increases, its adsorption ability gradually decreases. Therefore, when the adsorption capacity of adsorbent 111 reaches a certain standard, the adsorption process of adsorbent 111 is stopped, and the process of releasing the adsorbed gas by adsorbent 111 begins, which is called the regeneration process of adsorbent 111. The chlorine-containing gas released by adsorbent 111 and the alkali solution provided by the alkali solution tank enter the scrubber 120 together. The alkali solution contacts the chlorine-containing gas in the form of spraying in the scrubber 120 to absorb chloride ions in the air. The air after removing chloride ions is discharged through the vent stack 130, and the solution containing chloride ions is discharged from the scrubber 120 to the collection tank 150. After the regeneration process of adsorbent 111 ends, adsorbent 111 can re-enter the adsorption process and continue to adsorb and process the compressed air discharged from the salt cavern 200.

[0056] As a possible example, in this embodiment, the compressed air dechlorination system 100 further includes a filter 160 for re-filtering the compressed air after dechlorination treatment. The inlet of the filter 160 is connected to the outlet of the adsorption tank 113 through a pipeline, and the outlet of the filter 160 is used to be connected to the inlet of the compressed air power generation system through a pipeline.

[0057] The filter 160 is used to adsorb fine particles in the compressed air, and these particles may be the particles lost by the adsorbent 111 under the impact of the compressed air. By filtering these particulate matters, the impact on the expander blades by the particulate matters is reduced, thereby prolonging the service life of the expander.

[0058] As a possible example, in this embodiment, the number of filters 160 is multiple, and the multiple filters 160 are arranged in parallel to continuously filter the dechlorinated compressed air in an alternative maintenance manner. When the pressure difference across a certain filter 160 reaches a certain standard, the inlet and outlet of this filter 160 are closed, and this filter 160 enters the maintenance state, and the filtering work continues through other filters 160, so as to keep the filtering process continuous.

[0059] As a possible example, in this embodiment, the number of compressed air dechlorination devices 110 is multiple, so as to continuously dechlorinate the compressed air by alternately releasing chlorine-containing gas to the scrubber 120. When the pressure difference across a certain compressed air dechlorination device 110 reaches a certain standard, the inlet of this compressed air dechlorination device 110 is closed, the passage between the outlet of this compressed air dechlorination device 110 and the filter 160 is closed, the passage between the outlet of this compressed air dechlorination device 110 and the inlet of the scrubber 120 is opened, and this compressed air dechlorination device 110 enters the regeneration process of the adsorbent 111, and the adsorption work continues through other compressed air dechlorination devices 110, so as to keep the adsorption process continuous.

[0060] This embodiment also provides a method for using a compressed air dechlorination system. Using the above-mentioned compressed air dechlorination system 100, the method includes the following steps:

[0061] Monitor the pressure difference at both ends of the adsorbent 111 to obtain the measured pressure difference, and compare the measured pressure difference with the preset stop absorption pressure difference and stop release pressure difference respectively.

[0062] When the measured pressure difference is higher than the stop absorption pressure difference, interrupt the connection between the air inlet of the compressed air dechlorination device 110 and the gas outlet of the salt cavern 200, and interrupt the connection between the air outlet of the compressed air dechlorination device 110 and the air inlet of the compressed air power generation system. Open the connection between the air outlet of the compressed air dechlorination device 110 and the air inlet of the scrubbing tower 120, and open the connection between the liquid outlet of the alkali liquid tank 140 and the liquid inlet of the scrubbing tower 120.

[0063] When the measured pressure difference is lower than the stop release pressure difference, open the connection between the air inlet of the compressed air dechlorination device 110 and the gas outlet of the salt cavern 200, and open the connection between the air outlet of the compressed air dechlorination device 110 and the air inlet of the compressed air power generation system. Interrupt the connection between the air outlet of the compressed air dechlorination device 110 and the air inlet of the scrubbing tower 120, and interrupt the connection between the liquid outlet of the alkali liquid tank 140 and the liquid inlet of the scrubbing tower 120.

[0064] As the adsorption amount of the adsorbent 111 increases, the density of the adsorbent 111 gradually increases, the measured pressure difference gradually increases, and the adsorption capacity of the adsorbent 111 gradually decreases. Therefore, the measured pressure difference can characterize the state of the adsorbent 111. When the measured pressure difference is higher than the stop absorption pressure difference, the adsorbent 111 enters the regeneration process. When the measured pressure difference is lower than the stop release pressure difference, the adsorbent 111 enters the adsorption process. By adopting the above method, the measured pressure difference is generally maintained between the stop absorption pressure difference and the stop release pressure difference.

[0065] As a possible example, in this embodiment, the method for using the compressed air dechlorination system further includes the following steps:

[0066] Monitor the chlorine content at the air outlet of the adsorption tank 113 to obtain the first chlorine content, and compare the first chlorine content with the preset first control content.

[0067] When the first chlorine content is higher than the first control content, reduce the valve opening degree on the pipeline between the air inlet of the compressed air dechlorination device 110 and the gas outlet of the salt cavern 200.

[0068] It should be noted that as the adsorption capacity of the adsorbent 111 increases, its adsorption ability gradually decreases. Therefore, during the adsorption process of the adsorbent 111, it is necessary to gradually reduce the flow rate of the compressed air, so that the chlorine content of the gas discharged from the air outlet of the compressed air dechlorination device 110 is maintained below the first control content, thereby reducing the corrosion of the compressed air power generation system.

[0069] As a possible example, in this embodiment, the method for using the compressed air dechlorination system further includes the following steps:

[0070] After opening the connection between the air outlet of the compressed air dechlorination device 110 and the air inlet of the scrubbing tower 120, gradually increase the opening degree of the valve on the pipeline between the air outlet of the compressed air dechlorination device 110 and the air inlet of the scrubbing tower 120.

[0071] By gradually increasing the opening degree of the valve on the pipeline between the air outlet of the compressed air dechlorination device 110 and the air inlet of the scrubbing tower 120, the air pressure in the adsorption tank 113 of the compressed air dechlorination device 110 decreases at a slow speed. This slow decrease in air pressure keeps the air pressure environment where the adsorbent 111 is located at a relatively high level. On the one hand, it is beneficial to increase the speed at which the adsorbent 111 releases the adsorbed gas. On the other hand, it can reduce the flow rate of the air flow, thereby reducing the impact of the air flow on the adsorbent 111 and prolonging the contact time between the air flow and the lye.

[0072] As a possible example, in this embodiment, the method for using the compressed air dechlorination system further includes the following steps:

[0073] Monitor the chlorine content at the air outlet of the scrubbing tower 120 to obtain the second chlorine content, and compare the second chlorine content with the preset second control content.

[0074] When the second chlorine content is higher than the second control content, increase the lye flow rate between the liquid outlet of the lye tank 140 and the liquid inlet of the scrubbing tower 120.

[0075] In this way, more chlorine in the air is absorbed by the lye.

[0076] As a possible example, in this embodiment, the type of the lye is sodium hydroxide. After the sodium hydroxide solution contacts the chlorine-containing gas, the chloride ions exist in the solution in the form of sodium chloride.

[0077] As a possible example, in this embodiment, the number of the compressed air dechlorination devices 110 is two, and the number of the filters 160 is two.

[0078] As a possible example, in this embodiment, the method for using the compressed air dechlorination system is not manually operated but automatically carried out to improve the dechlorination efficiency and reduce the cost.

[0079] That is, the compressed air dechlorination system 100 further includes a control system. The control system includes a control unit, a sensor group 170 for delivering induction signals to the control unit, and a valve group 180 for executing the control instructions of the control unit. Both the sensor group 170 and the valve group 180 are electrically connected to the control unit.

[0080] In this embodiment, the sensor group 170 includes a differential pressure sensor 1710 installed on the adsorption tank 113. The differential pressure sensor 1710 is used to monitor the pressure difference across the adsorbent 111 to obtain the above-mentioned measured differential pressure.

[0081] The valve group 180 includes a first cutoff valve 188, a second cutoff valve 181, a third cutoff valve 182, and a fourth cutoff valve 183. The first cutoff valve 188 is located at the air inlet of the compressed air dechlorination device 110. The second cutoff valve 181 and the third cutoff valve 182 are arranged in series at the air outlet of the compressed air dechlorination device 110. A pipeline leading to the air inlet of the scrubbing tower 120 is branched between the second cutoff valve 181 and the third cutoff valve 182 to deliver chlorine-containing gas to the scrubbing tower 120, and the fourth cutoff valve 183 is arranged on this pipeline.

[0082] When the control unit determines that the compressed air dechlorination device 110 is in the adsorption process, it controls the first cutoff valve 188 to open, the second cutoff valve 181 to open, the third cutoff valve 182 to open, and the fourth cutoff valve 183 to close.

[0083] When the control unit determines that the compressed air dechlorination device 110 is in the regeneration process, it controls the first cutoff valve 188 to close, the second cutoff valve 181 to open, the third cutoff valve 182 to close, and the fourth cutoff valve 183 to open.

[0084] In this embodiment, the sensor group 170 further includes a post-adsorption chlorine content sensor 1711 installed at the air outlet of the adsorption tank 113, which is used to monitor the chlorine content at the air outlet of the adsorption tank 113 to obtain the above-mentioned first chlorine content, so that the control unit can compare the first chlorine content with a preset first control content.

[0085] The valve group 180 further includes a pre-adsorption flow regulating valve 184 installed at the air inlet of the adsorption tank 113, which is used to regulate the flow rate of the compressed air flowing through the compressed air dechlorination device 110. The control unit adjusts the opening degree of the pre-adsorption flow regulating valve 184 according to the data monitored by the post-adsorption chlorine content sensor 1711.

[0086] In this embodiment, the sensor group 170 further includes a post-spray chlorine content sensor 1712 installed at the air outlet of the scrubbing tower 120, which is used to monitor the chlorine content at the air outlet of the scrubbing tower 120 to obtain the above-mentioned second chlorine content, so that the control unit can compare the second chlorine content with a preset second control content.

[0087] The valve group 180 further includes an alkali liquid flow regulating valve 185 installed at the liquid outlet of the alkali liquid tank 140 for regulating the flow rate of the alkali liquid flowing to the scrubbing tower 120. The control unit adjusts the opening degree of the alkali liquid flow regulating valve 185 according to the data monitored by the post-spray chlorine content sensor 1712.

[0088] In this embodiment, the sensor group 170 further includes a post-adsorption pressure sensor 1713 installed at the gas outlet of the adsorption tank 113 for monitoring the pressure at the gas outlet of the adsorption tank 113.

[0089] The valve group 180 further includes a regeneration process flow regulating valve 186. The regeneration process flow regulating valve 186 is disposed on the pipeline leading to the air inlet of the scrubbing tower 120 between the second cut-off valve 181 and the third cut-off valve 182. The control unit adjusts the opening degree of the regeneration process flow regulating valve 186 according to the data monitored by the post-adsorption pressure sensor 1713.

[0090] In this embodiment, the sensor group 170 further includes a salt cave outlet flow sensor 1714, a pre-adsorption chlorine content sensor 1715, a pre-adsorption temperature sensor 1716, a post-adsorption temperature sensor 1717, an alkali liquid flow sensor 1718, and a pH sensor 1719.

[0091] The salt cave outlet flow sensor 1714 is disposed at the gas outlet of the salt cave 200 and is connected in series with two compressed air dechlorination devices 110 at the same time for monitoring the flow rate of the compressed air flowing out of the gas outlet of the salt cave 200.

[0092] The pre-adsorption chlorine content sensor 1715 is disposed at the air inlet of the adsorption tank 113 for monitoring the chlorine content of the compressed air at the air inlet of the adsorption tank 113.

[0093] The pre-adsorption temperature sensor 1716 is disposed at one end of the adsorption tank 113 close to the air inlet for monitoring the temperature of the compressed air before adsorption.

[0094] The post-adsorption temperature sensor 1717 is disposed at the gas outlet of the adsorption tank 113 for monitoring the temperature of the compressed air after adsorption.

[0095] The alkali liquid flow sensor 1718 is disposed at the liquid outlet of the alkali liquid tank for monitoring the flow rate of the alkali liquid flowing to the scrubbing tower 120.

[0096] The pH sensor 1719 is disposed in the collection tank 150 for monitoring the acidity and alkalinity of the solution in the collection tank 150.

[0097] In the present invention, specific examples are used to illustrate the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation on the present invention.

Claims

1. A compressed air dechlorination device (110), characterized in that: include: An adsorbent (111), the adsorbent (111) comprising a plurality of adsorption layers arranged continuously or at intervals along the axial direction of the adsorbent, the adsorption layers comprising an activated carbon bonding layer (1111) and an activated coke bonding layer (1112), and the adsorption layers at both ends of the adsorbent (111) are both activated coke bonding layers (1112); A retaining frame (112), wherein the number of the retaining frames (112) is two, and the two retaining frames (112) are respectively against the active coke bonding layers (1112) at two ends of the adsorbent (111); An adsorption tank (113), wherein an air inlet of the adsorption tank (113) is used to communicate with an air outlet of a salt cavern (200) through a pipeline, and an air outlet of the adsorption tank (113) is used to communicate with an air inlet of a compressed air power generation system through a pipeline; the adsorbent (111) and the retaining frame (112) are both located in the adsorption tank (113); one retaining frame (112) is located between the air inlet of the adsorption tank (113) and the adsorbent (111), and the other retaining frame (112) is located between the air outlet of the adsorption tank (113) and the adsorbent (111); The retaining frame (112) comprises a conical cover (1121) and a connecting frame (1122), wherein the connecting frame (1122) respectively connects the conical cover (1121) and the adsorption tank (113); the tip of the conical cover (1121) faces the side away from the adsorbent (111), and the activated coke bonding layer (1112) in contact with the conical cover (1121) has a conical surface adapted to the inner side surface of the conical cover (1121).

2. The compressed air dechlorination device (110) according to claim 1, characterized in that: A reinforcing hoop (114) is fixed to the outer side of the adsorption tank (113).

3. A compressed air dechlorination system (100), characterized in that: The invention comprises a compressed air dechlorination device (110) according to any one of claims 1 to 2, and further comprises a washing tower (120), a venting chimney (130), an alkali liquid tank (140) and a collecting pool (150); the gas outlet of the adsorption tank (113) is connected to the gas inlet of the washing tower (120) through a pipeline, so as to release the chlorine-containing gas adsorbed by the adsorbent (111) to the washing tower (120); the liquid outlet of the alkali liquid tank (140) is connected to the liquid inlet of the washing tower (120) through a pipeline, so as to supply alkali liquid to the washing tower (120); the washing tower (120) is used to spray alkali liquid on the chlorine-containing gas; the gas outlet of the washing tower (120) is connected to the venting chimney (130) through a pipeline, so as to discharge the gas after the spraying treatment; and the collecting pool (150) is used to collect the alkali liquid after the spraying treatment.

4. The compressed air dechlorination system (100) according to claim 3, characterized in that: It also includes a filter (160) for re-filtering the compressed air that has undergone dechlorination treatment; the air inlet of the filter (160) is connected to the air outlet of the adsorption tank (113) through a pipeline, and the air outlet of the filter (160) is used to connect to the air inlet of the compressed air power generation system through the pipeline.

5. The compressed air dechlorination system (100) according to claim 4, characterized in that: The number of the filters (160) is plural, and the plural filters (160) are arranged in parallel, so that the filters (160) can continuously filter the dechlorinated compressed air through alternating maintenance.

6. The compressed air dechlorination system (100) according to claim 3, characterized in that: The number of the compressed air dechlorination devices (110) is plural, so that the compressed air dechlorination devices (110) continuously perform a process of dechlorinating the compressed air by alternately releasing chlorine-containing gas to the scrubbing tower (120).

7. A method for using a compressed air dechlorination system, characterized in that: The compressed air dechlorination system (100) according to any one of claims 3 to 6 comprises the following steps: Monitoring the pressure difference at both ends of the adsorbent (111) to obtain a measured pressure difference, and comparing the measured pressure difference with a preset absorption stop pressure difference and a release stop pressure difference; When the measured pressure difference is higher than the absorption stopping pressure difference, the connection between the air inlet of the compressed air dechlorination device (110) and the air outlet of the salt cavern (200) is interrupted, and the connection between the air outlet of the compressed air dechlorination device (110) and the air inlet of the compressed air power generation system is interrupted; the connection between the air outlet of the compressed air dechlorination device (110) and the air inlet of the washing tower (120) is opened, and the connection between the liquid outlet of the alkali liquid tank (140) and the liquid inlet of the washing tower (120) is opened; When the measured pressure difference is lower than the stop release pressure difference, the connection between the air inlet of the compressed air dechlorination device (110) and the air outlet of the salt cavern (200) is opened, and the connection between the air outlet of the compressed air dechlorination device (110) and the air inlet of the compressed air power generation system is opened; the connection between the air outlet of the compressed air dechlorination device (110) and the air inlet of the washing tower (120) is interrupted, and the connection between the liquid outlet of the alkali liquid tank (140) and the liquid inlet of the washing tower (120) is interrupted.

8. The method for using the compressed air dechlorination system according to claim 7, characterized in that: The following steps are also included: Monitoring the chlorine content at the gas outlet of the adsorption tank (113) to obtain a first chlorine content, and comparing the first chlorine content with a preset first control content; When the first chlorine content is higher than the first controlled content, the valve opening on the pipeline between the air inlet of the compressed air dechlorination device (110) and the air outlet of the salt cavern (200) is reduced.

9. The method for using the compressed air dechlorination system according to claim 7, characterized in that: The following steps are also included: After the connection between the air outlet of the compressed air dechlorination device (110) and the air inlet of the washing tower (120) is opened, the opening degree of the valve on the pipeline between the air outlet of the compressed air dechlorination device (110) and the air inlet of the washing tower (120) is gradually increased.

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