Temperature swing adsorption device

Abstract

The invention discloses a temperature swing adsorption device. The temperature swing adsorption device comprises a compressor, a regeneration cooler and a plurality of adsorption towers. A third pipeline and a fourth pipeline are arranged on each adsorption tower; the compressor is connected between the third pipeline and the fourth pipeline; the compressor extracts purified gas which is not discharged through a third pipeline, and the compressed purified gas enters the adsorption tower through a fourth pipeline to be heated and regenerated to form desorbed gas; desorbed gas is discharged after passing through a third pipeline and the compressor; according to the invention, energy can be recycled in the heating regeneration process through the compressor, the energy consumption of regeneration gas heating is reduced, the consumption of regeneration gas is reduced, the purity of a target component in the desorbed gas is further improved, and the desorbed gas has a better economic value.

Description

Technical Field

[0001] The present application relates to the technical field of temperature swing adsorption, and in particular to a temperature swing adsorption device. Background Art

[0002] A lot of volatile organic matter is generated in the chemical production process, such as dichloromethane volatilization gas generated in the production process of lithium battery separators and volatile organic compounds (VOCs) emissions from storage tanks, which do not meet the direct emission requirements and need to be treated to meet the standards before being discharged. Among them, the recovery of some trace organic matter with high added value can not only meet environmental protection requirements, but also realize economic value.

[0003] At present, temperature swing adsorption, as a commonly used recovery method for trace organic matter, has the advantages of simple process, high adsorption efficiency and low emission indicators. However, traditional temperature swing adsorption also has the disadvantages of high energy consumption, large regeneration gas consumption and low purity of recovered gas, which makes it difficult to meet the requirements for the reuse of recovered gas. Summary of the invention

[0004] The embodiment of the present application provides a variable temperature adsorption device, which can solve the technical problem that the current adsorption tower needs to rely on heated air to continuously heat the adsorption tower, resulting in high energy consumption and low purity of the recovered gas.

[0005] An embodiment of the present application provides a variable temperature adsorption device, including: a compressor, a regeneration cooler and multiple adsorption towers, each adsorption tower successively undergoes an adsorption state, a heating regeneration state and a cold blowing state within a working cycle; each adsorption tower is provided with a first pipeline and a second pipeline; the first pipeline is used to transport the raw gas to the adsorption tower to adsorb the target components in the raw gas to form a purified gas; the second pipeline is used to discharge at least part of the purified gas; each adsorption tower is provided with a third pipeline and a fourth pipeline; the compressor is connected between the third pipeline and the fourth pipeline; the compressor extracts the purified gas that is not discharged through the third pipeline, and after compression, enters the adsorption tower through the fourth pipeline for heating and regeneration to form a desorbed gas; the desorbed gas is discharged after passing through the third pipeline and the compressor; each adsorption tower is provided with a fifth pipeline and a sixth pipeline; the fifth pipeline is used to transport the raw gas to the adsorption tower for cold blowing; the sixth pipeline is used to transport the raw gas after cold blowing to the regeneration cooler for cooling.

[0006] In some embodiments, each adsorption tower is provided with a first interface and a second interface, the first interface is provided at the bottom of the adsorption tower, and the second interface is provided at the top of the adsorption tower.

[0007] In some embodiments, the first pipeline, the third pipeline, and the fifth pipeline are respectively connected to the first interface; the second pipeline, the fourth pipeline, and the sixth pipeline are respectively connected to the second interface.

[0008] In some embodiments, the compressor includes an oil-free screw compressor, and the operating pressure range of the compressor is 0.1MPaA-1.5MPaA

[0009] In some embodiments, the compressor includes an air inlet and an air outlet, and the difference between the air pressure at the air outlet of the compressor and the air pressure at the air inlet of the compressor is greater than or equal to 0.05 MPa.

[0010] In some embodiments, the air temperature of the air inlet of the compressor ranges from 25°C to 150°C, and the air temperature of the air outlet of the compressor ranges from 60°C to 220°C.

[0011] In some embodiments, after the compressor extracts the unexhausted purified gas, the pressure in the adsorption tower is less than or equal to 0.013 MPaA.

[0012] In some embodiments, the adsorption tower includes a first adsorption tower and a second adsorption tower; when the first adsorption tower is in an adsorption state, the second adsorption tower is in a heating regeneration state or a cold blowing state; when the second adsorption tower is in an adsorption state, the first adsorption tower is in a heating regeneration state or a cold blowing state.

[0013] In some embodiments, the first pipeline on the first adsorption tower includes a first trunk and a first branch, and the first branch is connected between the first trunk and the first adsorption tower; the first pipeline on the second adsorption tower includes a first trunk and a second branch, and the second branch is connected between the first trunk and the second adsorption tower; the second pipeline on the first adsorption tower includes a second trunk and a third branch, and the third branch is connected between the second trunk and the first adsorption tower; the second pipeline on the second adsorption tower includes a second trunk and a fourth branch, and the fourth branch is connected between the second trunk and the second adsorption tower; the third pipeline on the first adsorption tower includes a third trunk and a fifth branch, and the fifth branch is connected between the third trunk and the first adsorption tower; the third pipeline on the second adsorption tower includes a third trunk and a sixth branch, and the sixth branch is connected between the third trunk and the second adsorption tower; the fourth pipeline on the first adsorption tower includes a fourth trunk and a seventh branch, and the seventh branch is connected between the third trunk and the first adsorption tower. It is connected between the fourth main road and the first adsorption tower; the fourth pipeline on the second adsorption tower includes the fourth main road and the eighth branch, and the eighth branch is connected between the fourth main road and the second adsorption tower; the fifth pipeline on the first adsorption tower includes the fifth main road and the fifth branch, and the fifth branch is connected between the fifth main road and the first adsorption tower; the fifth pipeline on the second adsorption tower includes the fifth main road and the sixth branch; the sixth branch is connected between the fifth main road and the second adsorption tower; the sixth pipeline on the first adsorption tower includes the sixth main road and the seventh branch, and the seventh branch is connected between the sixth main road and the first adsorption tower; the sixth pipeline on the second adsorption tower includes the sixth main road and the eighth branch; the eighth branch is connected between the sixth main road and the second adsorption tower; the compressor is arranged between the third main road and the fourth main road; the regeneration cooler is arranged on the sixth main road, and the sixth main road located on the outlet side of the regeneration cooler is connected to the first branch and the second branch.

[0014] In some embodiments, a first valve is provided on the first main road, and a second valve is provided on the first branch road; a third valve is provided on the second branch road; a fourth valve is provided on the third branch road; a fifth valve is provided on the fourth branch road; a sixth valve is provided on the fifth branch road; a seventh valve is provided on the sixth branch road; an eighth valve is provided on the seventh branch road; a ninth valve is provided on the eighth branch road; a tenth valve is provided on the fifth main road, and an eleventh valve is provided on the third main road.

[0015] In some embodiments, the temperature swing adsorption device further includes a controller for controlling the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve, the tenth valve and the eleventh valve.

[0016] In some embodiments, when the first adsorption tower is in the adsorption state and the second adsorption tower is in the heating regeneration state, the first valve, the second valve, the fourth valve, the seventh valve, the ninth valve, and the eleventh valve are opened, and the third valve, the fifth valve, the sixth valve, the eighth valve, and the tenth valve are closed; when the first adsorption tower is in the adsorption state and the second adsorption tower is in the cold blowing state, the first valve, the second valve, the fourth valve, the seventh valve, the ninth valve, and the tenth valve are opened, and the third valve, the fifth valve, the sixth valve, the eighth valve, and the eleventh valve are closed.

[0017] In some embodiments, when the second adsorption tower is in the adsorption state and the first adsorption tower is in the heating regeneration state, the first valve, the third valve, the fifth valve, the sixth valve, the eighth valve, and the eleventh valve are opened, and the second valve, the fourth valve, the seventh valve, the ninth valve, and the tenth valve are closed; when the second adsorption tower is in the adsorption state and the first adsorption tower is in the cold blowing state, the first valve, the third valve, the fifth valve, the sixth valve, the eighth valve, and the tenth valve are opened, and the second valve, the fourth valve, the seventh valve, the ninth valve, and the eleventh valve are closed.

[0018] In some embodiments, the target component is R134a.

[0019] The variable temperature adsorption device provided in the embodiment of the present application uses a compressor to extract the purified gas that has not been discharged from the adsorption tower, and after compression, it enters the adsorption tower to heat and regenerate the adsorbent in the adsorption tower to form desorbed gas. Compared with the existing technology of heating the regenerated gas through a heater and then transporting it to the adsorption tower to heat and regenerate the adsorbent, the present application can realize the recycling of energy in the heating and regeneration process through a compressor, reduce the energy consumption of heating the regenerated gas, reduce the amount of regenerated gas, and thereby improve the purity of the target component in the desorbed gas, so that the desorbed gas has better economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0021] Figure 1 A schematic structural diagram of a temperature-swing adsorption device provided in an embodiment of the present application, in which the first adsorption tower is in an adsorption state and the second adsorption tower is in a heating regeneration state.

[0022] Figure 2 A structural schematic diagram of a temperature-swing adsorption device provided in an embodiment of the present application, in which the first adsorption tower is in an adsorption state and the second adsorption tower is in a cold blowing state.

[0023] Figure 3 A schematic structural diagram of a temperature-swing adsorption device provided in an embodiment of the present application in which the second adsorption tower is in an adsorption state and the first adsorption tower is in a heating regeneration state.

[0024] Figure 4 A structural schematic diagram of a temperature-swing adsorption device provided in an embodiment of the present application in which the second adsorption tower is in an adsorption state and the first adsorption tower is in a cold blowing state.

[0025] 1. First adsorption tower; 2. First pipeline; 3. Second pipeline; 4. Third pipeline; 5. Fourth pipeline; 6. Fifth pipeline; 7. Sixth pipeline; 8. Compressor; 9. Regeneration cooler; 10. Second adsorption tower;

[0026] 11. First interface; 12. Second interface; 21. First trunk road; 22. First branch road; 23. Second branch road; 31. Second trunk road; 32. Third branch road; 33. Fourth branch road; 41. Third trunk road; 42. Fifth branch road; 43. Sixth branch road; 51. Fourth trunk road; 52. Seventh branch road; 53. Eighth branch road; 61. Fifth trunk road; 71. Sixth trunk road. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0028] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] See also Figures 1 to 4, an embodiment of the present application provides a variable temperature adsorption device. The variable temperature adsorption device includes: a compressor 8, a regeneration cooler 9 and a plurality of adsorption towers. Each adsorption tower sequentially undergoes an adsorption state, a heating regeneration state and a cold blowing state in one working cycle. In the present embodiment, the adsorption tower includes a first adsorption tower 1 and a second adsorption tower 10. When the first adsorption tower 1 is in an adsorption state, the second adsorption tower 10 is in a heating regeneration state or a cold blowing state; when the second adsorption tower 10 is in an adsorption state, the first adsorption tower 1 is in a heating regeneration state or a cold blowing state. By alternating the operation of the first adsorption tower 1 and the second adsorption tower 10, the working efficiency of the variable temperature adsorption device can be improved.

[0031] Table 1 Corresponding timetable of each stage of the first adsorption tower and the second adsorption tower

[0032] Device Time T1 Time T2 Time T3 Time T4 The first adsorption tower Adsorption Adsorption Heating regeneration cold blow The second adsorption tower Heating regeneration cold blow Adsorption Adsorption

[0033] As shown in Table 1, for the first adsorption tower 1, the adsorption time T1+T2≥4h, and the regeneration time T3+T4+1≤T1+T2. In this way, when the adsorbent's efficiency in adsorbing the target component decreases, the regeneration time and the cold blowing time can be reduced, and the adsorption time can be increased to ensure the adsorption effect of the adsorbent on the target component.

[0034] See also Figures 1 to 4 Each adsorption tower is provided with a first interface 11 and a second interface 12. The first interface 11 is provided at the bottom of the adsorption tower, and the second interface 12 is provided at the top of the adsorption tower.

[0035] See also Figures 1 to 4 , each adsorption tower is provided with a first pipeline 2 and a second pipeline 3. The first pipeline 2 is connected to the first interface 11; the second pipeline 3 is connected to the second interface 12. The first pipeline 2 is used to transport the raw gas to the adsorption tower to adsorb the target component in the raw gas to form purified gas. The second pipeline 3 is used to discharge at least part of the purified gas. In this embodiment, the target component is R134a.

[0036] The first pipeline 2 on the first adsorption tower 1 includes a first main road 21 and a first branch road 22, and the first branch road 22 is connected between the first main road 21 and the first adsorption tower 1. Specifically, one end of the first branch road 22 is connected to the first main road 21, and the other end of the first branch road 22 is connected to the first interface 11 of the first adsorption tower 1. The first main road 21 is provided with a first valve V1, and the first branch road 22 is provided with a second valve V2.

[0037] The first pipeline 2 on the second adsorption tower 10 includes a first main road 21 and a second branch road 23, and the second branch road 23 is connected between the first main road 21 and the second adsorption tower 10. Specifically, one end of the second branch road 23 is connected to the first main road 21, and the other end of the second branch road 23 is connected to the first interface 11 of the second adsorption tower 10. A third valve V3 is provided on the second branch road 23. That is, the first pipeline 2 on the second adsorption tower 10 and the first pipeline 2 on the first adsorption tower 1 share the first main road 21.

[0038] The second pipeline 3 on the first adsorption tower 1 includes a second main road 31 and a third branch road 32, and the third branch road 32 is connected between the second main road 31 and the first adsorption tower 1. Specifically, one end of the third branch road 32 is connected to the second main road 31, and the other end of the third branch road 32 is connected to the second interface 12 of the first adsorption tower 1. The third branch road 32 is provided with a fourth valve V4.

[0039] The second pipeline 3 on the second adsorption tower 10 includes a second main road 31 and a fourth branch road 33, and the fourth branch road 33 is connected between the second main road 31 and the second adsorption tower 10. Specifically, one end of the fourth branch road 33 is connected to the second main road 31, and the other end of the fourth branch road 33 is connected to the second interface 12 of the second adsorption tower 10. A fifth valve V5 is provided on the fourth branch road 33. That is, the second pipeline 3 on the second adsorption tower 10 and the second pipeline 3 on the first adsorption tower 1 share the second main road 31.

[0040] See also Figures 1 to 4 , each adsorption tower is provided with a third pipeline 4 and a fourth pipeline 5. The third pipeline 4 is connected to the first interface 11; the fourth pipeline 5 is connected to the second interface 12. The compressor 8 is connected between the third pipeline 4 and the fourth pipeline 5; the compressor 8 extracts the purified gas that has not been discharged through the third pipeline 4, and after compression, enters the adsorption tower through the fourth pipeline 5 for heating and regeneration to form desorbed gas; the desorbed gas is discharged after passing through the third pipeline 4 and the compressor 8. Compared with the existing technology of heating and regenerating the adsorbent by heating the regenerated gas through the heater and then transporting it to the adsorption tower, the present application can realize the recycling of energy in the heating and regeneration process through the compressor 8, reduce the energy consumption of heating the regenerated gas, reduce the amount of regenerated gas, and thereby improve the purity of the target component in the desorbed gas, so that the desorbed gas has better economic value.

[0041] The third pipeline 4 on the first adsorption tower 1 includes a third trunk 41 and a fifth branch 42, and the fifth branch 42 is connected between the third trunk 41 and the first adsorption tower 1. Specifically, one end of the fifth branch 42 is connected to the third trunk 41, and the other end of the fifth branch 42 is connected to the first interface 11 of the first adsorption tower 1. A sixth valve V6 is provided on the fifth branch 42. An eleventh valve V11 is provided on the third trunk 41.

[0042] The third pipeline 4 on the second adsorption tower 10 includes a third trunk 41 and a sixth branch 43, and the sixth branch 43 is connected between the third trunk 41 and the second adsorption tower 10. Specifically, one end of the sixth branch 43 is connected to the third trunk 41, and the other end of the sixth branch 43 is connected to the first interface 11 of the second adsorption tower 10. A seventh valve V7 is provided on the sixth branch 43. That is, the third pipeline 4 on the second adsorption tower 10 and the third pipeline 4 on the first adsorption tower 1 share the third trunk 41.

[0043] The fourth pipeline 5 on the first adsorption tower 1 includes a fourth trunk 51 and a seventh branch 52, and the seventh branch 52 is connected between the fourth trunk 51 and the first adsorption tower 1. Specifically, one end of the seventh branch 52 is connected to the fourth trunk 51, and the other end of the seventh branch 52 is connected to the second interface 12 of the first adsorption tower 1. The seventh branch 52 is provided with an eighth valve V8.

[0044] The fourth pipeline 5 on the second adsorption tower 10 includes a fourth trunk 51 and an eighth branch 53, and the eighth branch 53 is connected between the fourth trunk 51 and the second adsorption tower 10. Specifically, one end of the eighth branch 53 is connected to the fourth trunk 51, and the other end of the eighth branch 53 is connected to the second interface 12 of the second adsorption tower 10. A ninth valve V9 is provided on the eighth branch 53. That is, the fourth pipeline 5 on the second adsorption tower 10 and the fourth pipeline 5 on the first adsorption tower 1 share the fourth trunk 51.

[0045] Wherein, the compressor 8 is arranged between the third trunk road 41 and the fourth trunk road 51. Wherein, the compressor 8 includes an oil-free screw compressor, and the working pressure range of the compressor 8 is 0.1MPaA-1.5MPaA. The compressor 8 includes an air inlet 81 and an air outlet 82, and the difference between the air pressure of the air outlet 82 of the compressor 8 and the air pressure of the air inlet 81 of the compressor 8 is greater than or equal to 0.05MPa. The air temperature range of the air inlet 81 of the compressor 8 is 25℃-150℃, and the air temperature range of the air outlet 82 of the compressor 8 is 60℃-220℃. After the compressor 8 extracts the purified gas that has not been discharged, the pressure in the adsorption tower is less than or equal to 0.013MpaA. Thereby, the temperature of the gas compressed by the compressor 8 can be satisfied to heat and regenerate the adsorbent. The compressor 8 is used to extract the purified gas remaining in the adsorption tower, and the adsorption tower is heated and regenerated after compression and heating. Therefore, there is no need to add additional regeneration gas to the adsorption tower, thereby avoiding heating the regeneration gas and saving heating energy consumption ≥ 27.7%; reducing the content of regeneration gas in the adsorption tower, and increasing the content of target components in the desorbed gas, so that the purity of the target components in the desorbed gas is increased to ≥ 70%.

[0046] See also Figures 1 to 4 Each adsorption tower is provided with a fifth pipeline 6 and a sixth pipeline 7. The fifth pipeline 6 is connected to the first interface 11; the sixth pipeline 7 is connected to the second interface 12. The fifth pipeline 6 is used to transport the raw gas to the adsorption tower for cold blowing; the sixth pipeline 7 is used to transport the raw gas after cold blowing to the regeneration cooler 9 for cooling.

[0047] The fifth pipeline 6 on the first adsorption tower 1 includes a fifth trunk 61 and a fifth branch 42, and the fifth branch 42 is connected between the fifth trunk 61 and the first adsorption tower 1. Specifically, one end of the fifth branch 42 is connected to the fifth trunk 61, and the other end of the fifth branch 42 is connected to the first interface 11 of the first adsorption tower 1. The tenth valve V10 is provided on the fifth trunk 61. That is, the fifth pipeline 6 on the first adsorption tower 1 and the third pipeline 4 on the first adsorption tower 1 share the fifth branch 42.

[0048] Among them, the fifth pipeline 6 on the second adsorption tower 10 includes a fifth trunk road 61 and a sixth branch road 43; the sixth branch road 43 is connected between the fifth trunk road 61 and the second adsorption tower 10. Specifically, one end of the sixth branch road 43 is connected to the fifth trunk road 61, and the other end of the sixth branch road 43 is connected to the first interface 11 of the second adsorption tower 10. That is, the fifth pipeline 6 on the second adsorption tower 10 and the fifth pipeline 6 on the first adsorption tower 1 share the fifth trunk road 61. The fifth pipeline 6 on the second adsorption tower 10 and the third pipeline 4 on the second adsorption tower 10 share the sixth branch road 43.

[0049] Among them, the sixth pipeline 7 on the first adsorption tower 1 includes a sixth trunk road 71 and a seventh branch road 52, and the seventh branch road 52 is connected between the sixth trunk road 71 and the first adsorption tower 1. Specifically, one end of the seventh branch road 52 is connected to the sixth trunk road 71, and the other end of the seventh branch road 52 is connected to the second interface 12 of the first adsorption tower 1. That is, the sixth pipeline 7 on the first adsorption tower 1 and the fourth pipeline 5 on the first adsorption tower 1 share the seventh branch road 52.

[0050] Among them, the sixth pipeline 7 on the second adsorption tower 10 includes a sixth trunk road 71 and an eighth branch road 53; the eighth branch road 53 is connected between the sixth trunk road 71 and the second adsorption tower 10. Specifically, one end of the eighth branch road 53 is connected to the sixth trunk road 71, and the other end of the eighth branch road 53 is connected to the second interface 12 of the second adsorption tower 10. That is, the sixth pipeline 7 on the second adsorption tower 10 and the sixth pipeline 7 on the first adsorption tower 1 share the sixth trunk road 71. The sixth pipeline 7 on the second adsorption tower 10 and the fourth pipeline 5 on the second adsorption tower 10 share the eighth branch road 53.

[0051] The regenerative cooler 9 is disposed on the sixth trunk line 71 , and the sixth trunk line 71 located at the air outlet side of the regenerative cooler 9 is connected to the first branch line 22 and the second branch line 23 .

[0052] The temperature swing adsorption device further includes a controller (not shown) for controlling the first valve V1, the second valve V2, the third valve V3, the fourth valve V4, the fifth valve V5, the sixth valve V6, the seventh valve V7, the eighth valve V8, the ninth valve V9, the tenth valve V10 and the eleventh valve V11.

[0053] See also Figure 1 When the first adsorption tower 1 is in the adsorption state and the second adsorption tower 10 is in the heating regeneration state, the first valve V1, the second valve V2, the fourth valve V4, the seventh valve V7, the ninth valve V9, and the eleventh valve V11 are opened, and the third valve V3, the fifth valve V5, the sixth valve V6, the eighth valve V8, and the tenth valve V10 are closed.

[0054] Specifically, the first valve V1 and the second valve V2 are opened, and the raw gas enters the first adsorption tower 1 through the first main road 21 and the first branch road 22, and the adsorbent in the first adsorption tower 1 adsorbs the target components in the raw gas to form purified gas. The fourth valve V4 is opened, and part of the purified gas is discharged through the third branch road 32 and the second main road 31.

[0055] At the same time, the seventh valve V7 and the eleventh valve V11 are opened, and the compressor 8 extracts the undischarged purified gas in the second adsorption tower 10 through the sixth branch 43. The ninth valve V9 is opened, and the purified gas compressed by the compressor 8 enters the second adsorption tower 10 through the fourth trunk road 51 and the eighth branch 53 for heating and regeneration to form desorbed gas. The desorbed gas is discharged after passing through the sixth branch 43 and the compressor 8. The compressor 8 realizes the recycling of energy in the heating and regeneration process, reduces the energy consumption of heating the regenerated gas, reduces the amount of regenerated gas, and then improves the purity of the target component in the desorbed gas, so that the desorbed gas has better economic value.

[0056] See also Figure 2 When the first adsorption tower 1 is in the adsorption state and the second adsorption tower 10 is in the cold blowing state, the first valve V1, the second valve V2, the fourth valve V4, the seventh valve V7, the ninth valve V9, and the tenth valve V10 are opened, and the third valve V3, the fifth valve V5, the sixth valve V6, the eighth valve V8, and the eleventh valve V11 are closed.

[0057] Specifically, the first valve V1 and the second valve V2 are opened, and the raw gas enters the first adsorption tower 1 through the first main road 21 and the first branch road 22, and the adsorbent in the first adsorption tower 1 adsorbs the target components in the raw gas to form purified gas. The fourth valve V4 is opened, and part of the purified gas is discharged through the third branch road 32 and the second main road 31.

[0058] At the same time, the tenth valve V10 and the seventh valve V7 are opened, and the raw gas enters the second adsorption tower 10 through the fifth main road 61 and the sixth branch road 43 to perform cold blowing on the second adsorption tower 10. The ninth valve V9 is opened, and the raw gas after cold blowing on the second adsorption tower 10 passes through the eighth branch road 53 and the sixth main road 71, passes through the regeneration cooler 9, is cooled, and is mixed with the raw gas of the first main road 21. After mixing, it enters the first adsorption tower 1 through the first branch road 22, thereby realizing the recycling of the raw gas.

[0059] See also Figure 3 In some embodiments, when the second adsorption tower 10 is in the adsorption state and the first adsorption tower 1 is in the heating regeneration state, the first valve V1, the third valve V3, the fifth valve V5, the sixth valve V6, the eighth valve V8, and the eleventh valve V11 are opened, and the second valve V2, the fourth valve V4, the seventh valve V7, the ninth valve V9, and the tenth valve V10 are closed.

[0060] Specifically, the first valve V1 and the third valve V3 are opened, and the raw gas enters the second adsorption tower 10 through the first main road 21 and the second branch road 23. The adsorbent in the second adsorption tower 10 adsorbs the target components in the raw gas to form purified gas. The fifth valve V5 is opened, and part of the purified gas is discharged through the fourth branch road 33 and the second main road 31.

[0061] At the same time, the sixth valve V6 and the eleventh valve V11 are opened, and the compressor 8 extracts the undischarged purified gas in the first adsorption tower 1 through the fifth branch 42. The eighth valve V8 is opened, and the purified gas compressed by the compressor 8 enters the first adsorption tower 1 through the fourth trunk road 51 and the seventh branch 52 for heating and regeneration to form desorbed gas. The desorbed gas is discharged after passing through the fifth branch 42 and the compressor 8. The compressor 8 realizes the recycling of energy in the heating and regeneration process, reduces the energy consumption of heating the regenerated gas, reduces the amount of regenerated gas, and then improves the purity of the target component in the desorbed gas, so that the desorbed gas has better economic value.

[0062] See also Figure 4 When the second adsorption tower 10 is in the adsorption state and the first adsorption tower 1 is in the cold blowing state, the first valve V1, the third valve V3, the fifth valve V5, the sixth valve V6, the eighth valve V8, and the tenth valve V10 are opened, and the second valve V2, the fourth valve V4, the seventh valve V7, the ninth valve V9, and the eleventh valve V11 are closed.

[0063] Specifically, the first valve V1 and the third valve V3 are opened, and the raw gas enters the second adsorption tower 10 through the first main road 21 and the second branch road 23. The adsorbent in the second adsorption tower 10 adsorbs the target components in the raw gas to form purified gas. The fifth valve V5 is opened, and part of the purified gas is discharged through the fourth branch road 33 and the second main road 31.

[0064] At the same time, the tenth valve V10 and the sixth valve V6 are opened, and the raw gas enters the first adsorption tower 1 through the fifth main road 61 and the fifth branch road 42 to perform cold blowing on the first adsorption tower 1. The eighth valve V8 is opened, and the raw gas after cold blowing on the first adsorption tower 1 passes through the seventh branch road 52 and the sixth main road 71, passes through the regeneration cooler 9, is cooled, and is mixed with the raw gas of the first main road 21, and then enters the second adsorption tower 10 through the second branch road 23, thereby realizing the recycling of the raw gas.

[0065] When in use, the raw gas from the external device has a pressure of 2.0MPaG and a temperature of 40°C, and first enters the first adsorption tower 1 for adsorption, and the second adsorption tower 10 undergoes a heating regeneration stage and a cold blowing stage in sequence. After the adsorption is completed, the first adsorption tower 1 undergoes a heating regeneration stage and a cold blowing stage in sequence, and the second adsorption tower 10 performs adsorption. Among them, after the first adsorption tower 1 undergoes the cold blowing stage, the adsorbent in the first adsorption tower 1 is cooled to 40°C; after the second adsorption tower 10 undergoes the cold blowing stage, the adsorbent in the second adsorption tower 10 is cooled to 40°C.

[0066] Table 2 Logistics data table

[0067]

[0068] As shown in Table 2, the temperature-variable adsorption device provided in the embodiment of the present application utilizes the compressor 8 to extract the purified gas remaining in the adsorption tower, and heats and regenerates the adsorption tower after compression and heating. This eliminates the need to add additional regenerated gas to the adsorption tower, thereby reducing the content of the regenerated gas in the adsorption tower, increasing the content of the target component in the desorbed gas, and improving the purity of the target component in the desorbed gas.

[0069] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0070] The above is a detailed introduction to a variable temperature adsorption device provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A temperature swing adsorption device, characterized in that: include: A compressor (8), a regeneration cooler (9) and a plurality of adsorption towers, each of the adsorption towers sequentially undergoing an adsorption state, a heating regeneration state and a cold blowing state in one working cycle; Each of the adsorption towers is provided with a first pipeline (2) and a second pipeline (3); the first pipeline (2) is used to transport the raw gas to the adsorption tower to adsorb the target components in the raw gas to form purified gas; The second pipeline (3) is used to discharge at least part of the purified gas; Each of the adsorption towers is provided with a third pipeline (4) and a fourth pipeline (5); the compressor (8) is connected between the third pipeline (4) and the fourth pipeline (5); the compressor (8) extracts the purified gas that has not been discharged through the third pipeline (4), and after compression, enters the adsorption tower through the fourth pipeline (5) for heating and regeneration to form desorbed gas; the desorbed gas passes through the third pipeline (4) and the compressor (8) and is then discharged; Each of the adsorption towers is provided with a fifth pipeline (6) and a sixth pipeline (7); the fifth pipeline (6) is used to transport the raw gas to the adsorption tower for cold blowing; the sixth pipeline (7) is used to transport the raw gas after cold blowing to the regeneration cooler (9) for cooling.

2. The temperature swing adsorption device according to claim 1, characterized in that: Each of the adsorption towers is provided with a first interface (11) and a second interface (12), wherein the first interface (11) is provided at the bottom of the adsorption tower, and the second interface (12) is provided at the top of the adsorption tower.

3. The temperature swing adsorption device according to claim 2, characterized in that: The first pipeline (2), the third pipeline (4) and the fifth pipeline (6) are respectively connected to the first interface (11); The second pipeline (3), the fourth pipeline (5) and the sixth pipeline (7) are respectively connected to the second interface (12).

4. The temperature swing adsorption device according to claim 1, characterized in that: The compressor (8) comprises an oil-free screw compressor, and the operating pressure range of the compressor (8) is 0.1 MPaA-1.5 MPaA.

5. The temperature swing adsorption device according to claim 1, characterized in that: The compressor (8) comprises an air inlet (81) and an air outlet (82), and the difference between the air pressure of the air outlet (82) of the compressor (8) and the air pressure of the air inlet (81) of the compressor (8) is greater than or equal to 0.05 MPa.

6. The temperature swing adsorption device according to claim 1, characterized in that: The air temperature range of the air inlet (81) of the compressor (8) is 25°C-150°C, and the air temperature range of the air outlet (82) of the compressor (8) is 60°C-220°C.

7. The temperature swing adsorption device according to claim 1, characterized in that: After the compressor (8) extracts the purified gas that has not been discharged, the pressure in the adsorption tower is less than or equal to 0.013 MPaA.

8. The temperature swing adsorption device according to claim 1, characterized in that: The adsorption tower comprises a first adsorption tower (1) and a second adsorption tower (10); When the first adsorption tower (1) is in the adsorption state, the second adsorption tower (10) is in the heating regeneration state or the cold blowing state; When the second adsorption tower (10) is in the adsorption state, the first adsorption tower (1) is in the heating regeneration state or the cold blowing state.

9. The temperature swing adsorption device according to claim 8, characterized in that: The first pipeline (2) on the first adsorption tower (1) comprises a first main pipeline (21) and a first branch pipeline (22), and the first branch pipeline (22) is connected between the first main pipeline (21) and the first adsorption tower (1); The first pipeline (2) on the second adsorption tower (10) comprises the first main pipeline (21) and a second branch pipeline (23), and the second branch pipeline (23) is connected between the first main pipeline (21) and the second adsorption tower (10); The second pipeline (3) on the first adsorption tower (1) comprises a second main pipeline (31) and a third branch pipeline (32), and the third branch pipeline (32) is connected between the second main pipeline (31) and the first adsorption tower (1); The second pipeline (3) on the second adsorption tower (10) comprises the second main pipeline (31) and a fourth branch pipeline (33), and the fourth branch pipeline (33) is connected between the second main pipeline (31) and the second adsorption tower (10); The third pipeline (4) on the first adsorption tower (1) comprises a third main pipeline (41) and a fifth branch pipeline (42), and the fifth branch pipeline (42) is connected between the third main pipeline (41) and the first adsorption tower (1); The third pipeline (4) on the second adsorption tower (10) comprises the third main pipeline (41) and a sixth branch pipeline (43), and the sixth branch pipeline (43) is connected between the third main pipeline (41) and the second adsorption tower (10); The fourth pipeline (5) on the first adsorption tower (1) comprises a fourth main pipeline (51) and a seventh branch pipeline (52), and the seventh branch pipeline (52) is connected between the fourth main pipeline (51) and the first adsorption tower (1); The fourth pipeline (5) on the second adsorption tower (10) comprises the fourth main pipeline (51) and an eighth branch pipeline (53), and the eighth branch pipeline (53) is connected between the fourth main pipeline (51) and the second adsorption tower (10); The fifth pipeline (6) on the first adsorption tower (1) comprises a fifth main pipeline (61) and a fifth branch pipeline (42), and the fifth branch pipeline (42) is connected between the fifth main pipeline (61) and the first adsorption tower (1); The fifth pipeline (6) on the second adsorption tower (10) comprises the fifth main pipeline (61) and the sixth branch pipeline (43); the sixth branch pipeline (43) is connected between the fifth main pipeline (61) and the second adsorption tower (10); The sixth pipeline (7) on the first adsorption tower (1) comprises a sixth main pipeline (71) and a seventh branch pipeline (52), and the seventh branch pipeline (52) is connected between the sixth main pipeline (71) and the first adsorption tower (1); The sixth pipeline (7) on the second adsorption tower (10) comprises the sixth main pipeline (71) and the eighth branch pipeline (53); the eighth branch pipeline (53) is connected between the sixth main pipeline (71) and the second adsorption tower (10); The compressor (8) is arranged between the third trunk road (41) and the fourth trunk road (51); The regeneration cooler (9) is arranged on the sixth main road (71), and the sixth main road (71) located on the air outlet side of the regeneration cooler (9) is connected to the first branch road (22) and the second branch road (23).

10. The temperature swing adsorption device according to claim 9, characterized in that: The first trunk road (21) is provided with a first valve (V1), and the first branch road (22) is provided with a second valve (V2); the second branch road (23) is provided with a third valve (V3); the third branch road (32) is provided with a fourth valve (V4); the fourth branch road (33) is provided with a fifth valve (V5); the fifth branch road (42) is provided with a sixth valve (V6); the sixth branch road (43) is provided with a seventh valve (V7); the seventh branch road (52) is provided with an eighth valve (V8); the eighth branch road (53) is provided with a ninth valve (V9); the fifth trunk road (61) is provided with a tenth valve (V10), and the third trunk road (41) is provided with an eleventh valve (V11).

11. The temperature swing adsorption device according to claim 10, characterized in that: The temperature variable adsorption device also includes a controller, which is used to control the first valve (V1), the second valve (V2), the third valve (V3), the fourth valve (V4), the fifth valve (V5), the sixth valve (V6), the seventh valve (V7), the eighth valve (V8), the ninth valve (V9), the tenth valve (V10) and the eleventh valve (V11).

12. The temperature swing adsorption device according to claim 10, characterized in that: When the first adsorption tower (1) is in the adsorption state and the second adsorption tower (10) is in the heating regeneration state, the first valve (V1), the second valve (V2), the fourth valve (V4), the seventh valve (V7), the ninth valve (V9), and the eleventh valve (V11) are opened, and the third valve (V3), the fifth valve (V5), the sixth valve (V6), the eighth valve (V8), and the tenth valve (V10) are closed; When the first adsorption tower (1) is in the adsorption state and the second adsorption tower (10) is in the cold blowing state, the first valve (V1), the second valve (V2), the fourth valve (V4), the seventh valve (V7), the ninth valve (V9), and the tenth valve (V10) are opened, and the third valve (V3), the fifth valve (V5), the sixth valve (V6), the eighth valve (V8), and the eleventh valve (V11) are closed.

13. The temperature swing adsorption device according to claim 10, characterized in that: When the second adsorption tower (10) is in the adsorption state and the first adsorption tower (1) is in the heating regeneration state, the first valve (V1), the third valve (V3), the fifth valve (V5), the sixth valve (V6), the eighth valve (V8), and the eleventh valve (V11) are opened, and the second valve (V2), the fourth valve (V4), the seventh valve (V7), the ninth valve (V9), and the tenth valve (V10) are closed; When the second adsorption tower (10) is in the adsorption state and the first adsorption tower (1) is in the cold blowing state, the first valve (V1), the third valve (V3), the fifth valve (V5), the sixth valve (V6), the eighth valve (V8), and the tenth valve (V10) are opened, and the second valve (V2), the fourth valve (V4), the seventh valve (V7), the ninth valve (V9), and the eleventh valve (V11) are closed.

14. The temperature swing adsorption device according to claim 1, characterized in that: The target component is R134a.

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