Industrial by-product hydrogen purification system

Abstract

The utility model discloses an industrial by -product hydrogen purification system relates to hydrogen purification technical field. After the active carbon adsorption unit processing of the utility model, again through the adsorption of three TSA adsorption towers in TSA adsorption unit, the hydrogen purity after purification is equal to or greater than 99.999%, and the process does not need to consume the chemical reagent that can produce a large amount of waste liquid, and the process is simple.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen purification technology, specifically to an industrial by-product hydrogen purification system. Background Technology

[0002] sec-butanol gaseous phase undergoes a dehydrogenation reaction to produce MEK and byproduct hydrogen. The reacted material flows out from the bottom of the MEK reactor, passes through the MEK reactor feed / discharge heat exchanger and the MEK reactor feed preheater for heat exchange with the feed, and is then cooled by the dehydrogenation reactor condenser. Except for the hydrogen component, almost all other components condense into liquid, and the gas and liquid phases enter the crude MEK storage tank together. The uncondensed gaseous phase—hydrogen saturated with MEK—enters the MEK recovery unit, where it is cooled by chilled brine (-7 to -2°C) in the condenser to recover MEK. The hydrogen is then sent to a hydrogen compressor via a hydrogen buffer tank to be pressurized to a certain pressure, and then passes through an activated carbon adsorption tower to adsorb impurities such as C4, MEK, and SBA entrained in the hydrogen before being sent to the external hydrogen pipeline network.

[0003] The main purification technologies for industrial by-product hydrogen at home and abroad are:

[0004] 1) Membrane separation technology

[0005] Principle: Separation is achieved by utilizing the difference in the permeation rate of gas molecules through a membrane (such as PDMS silicone rubber membrane, palladium metal membrane).

[0006] Advantages: The equipment is compact with no moving parts, making it suitable for handling gases containing corrosive impurities such as H2S (pretreatment is required).

[0007] Limitations: The purity of single membrane separation is usually below 99%, and it is often used in combination with PSA (e.g., methanol cracked gas is first concentrated by membrane separation, and then purified by PSA).

[0008] 2) Low temperature distillation

[0009] Principle: Utilizing the difference in boiling points of each component (H2 boiling point -252.8℃, CO2 boiling point -78.5℃), liquefaction and separation are achieved at low temperatures.

[0010] Advantages: Suitable for large-scale processing (such as tail gas from steel plants), it can simultaneously recover components such as CO and CH4 with a purity of over 99.99%.

[0011] Limitations: High energy consumption (requires deep cooling), suitable for scenarios with stable gas supply.

[0012] 3) Chemical absorption method

[0013] Principle: CO2 is absorbed by amine solutions (such as MEA, DEA) or by copper ammonia solution.

[0014] Advantages: High efficiency in removing CO2 and CO, suitable for treating high-concentration impurity gases (such as coal gasification gas).

[0015] Limitations: It requires chemical reagents, generates waste liquid, and the process is relatively complex.

[0016] In view of the problems existing in the purification technology of industrial by-product hydrogen, there is an urgent need to develop a more effective industrial by-product hydrogen purification equipment. Utility Model Content

[0017] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an industrial by-product hydrogen purification system. The by-product hydrogen is treated by the activated carbon adsorption unit of this utility model and then adsorbed by three TSA adsorption towers. The hydrogen purified by this utility model system has a purity of ≥99.999%, and the process does not require the consumption of chemical reagents that will generate a large amount of waste liquid. The process is simple.

[0018] The technical solution of this utility model is as follows:

[0019] An industrial by-product hydrogen purification system includes an activated carbon adsorption unit and a TSA adsorption unit. The activated carbon adsorption unit and the TSA adsorption unit are connected via an activated carbon adsorbed hydrogen discharge pipeline. The TSA adsorption unit includes TSA adsorption tower A, TSA adsorption tower B, and TSA adsorption tower C. TSA adsorption towers A, B, and C are connected by pipelines to achieve series connection of TSA adsorption towers A and B to TSA adsorption tower C, and series connection of TSA adsorption towers B and C to TSA adsorption tower C. The TSA adsorption tower A is connected in series, as are the TSA adsorption towers C and A to B, with each pipeline equipped with a programmable valve. The activated carbon adsorption hydrogen discharge pipeline is connected to the inlet of TSA adsorption towers A, B, and C, and is equipped with a programmable valve. The outlets of TSA adsorption towers A, B, and C are connected to the product hydrogen discharge pipeline, and is equipped with a programmable valve.

[0020] Preferably, the activated carbon adsorption unit includes a hydrogen compressor, which is connected to a hydrogen inlet pipeline and a cooler via a pressurized hydrogen outlet pipeline. The cooler is connected to a hydrogen buffer tank via a pipeline. The hydrogen buffer tank is connected to the inlets of activated carbon adsorption tower A and activated carbon adsorption tower B via pipelines. The outlets of activated carbon adsorption tower A and activated carbon adsorption tower B are connected to activated carbon adsorption hydrogen discharge pipelines. Activated carbon adsorption tower A and activated carbon adsorption tower B are connected in series via pipelines, and programmable valves are installed on the pipelines.

[0021] Preferably, hydrogen detectors are installed at the outlets of TSA adsorption tower A, TSA adsorption tower B, and TSA adsorption tower C.

[0022] Preferably, the inlets of TSA adsorption tower A, TSA adsorption tower B, and TSA adsorption tower C are respectively connected to pressure relief pipelines, the pressure relief pipelines are connected to hydrogen recovery pipelines, and programmable valves are installed on the pressure relief pipelines and the hydrogen recovery pipelines respectively, with a control valve installed on the pressure relief pipelines.

[0023] Preferably, a cartridge dust collector is connected to the hydrogen recovery pipeline.

[0024] Preferably, the outlets of TSA adsorption towers A, B, and C are connected to regenerated hydrogen feed lines, which are connected to regenerated hydrogen branch lines one and two. A regenerated hydrogen heater is connected to regenerated hydrogen branch line one. Regenerated hydrogen branch lines one and two are respectively connected to the regenerated hydrogen pipeline. A programmable valve is installed on each of the regenerated hydrogen feed lines, branch lines one and two, and a control valve is installed on regenerated hydrogen branch line two. The inlets of TSA adsorption towers A, B, and C are respectively connected to regenerated hydrogen discharge lines, which are respectively connected to regenerated hydrogen vent lines and regenerated hydrogen recovery branch lines. The regenerated hydrogen recovery branch lines are connected to the recovery hydrogen pipeline, and programmable valves are installed on each of the regenerated hydrogen discharge lines, vent lines, and recovery branch lines.

[0025] Preferably, a cyclone separator is connected to the regenerated hydrogen venting pipeline.

[0026] Preferably, a steam-water separator is connected to the regenerated hydrogen recovery branch line.

[0027] Preferably, the activated carbon hydrogen adsorption outlet pipeline is connected to a bag filter and an adsorption dryer.

[0028] Preferably, a bag filter is connected to the hydrogen discharge pipeline of the product.

[0029] Compared with the prior art, this utility model has the following advantages:

[0030] 1. The by-product hydrogen gas is treated by the activated carbon adsorption unit of this invention, and then adsorbed by three TSA adsorption towers. The purified hydrogen gas has a purity of ≥99.999%, and the process does not require the consumption of chemical reagents that will generate a large amount of waste liquid. The process is simple.

[0031] 2. This utility model can monitor the concentration of hydrogen after treatment online using a hydrogen detector at the outlet of the TSA adsorption tower. If the hydrogen purity is not up to standard, the corresponding TSA adsorption tower can be automatically switched out through a programmable valve. The tower will then undergo depressurization, heating regeneration, cooling, pressurization, and switching back in to complete the regeneration of the TSA adsorption tower and ensure the quality of the product hydrogen. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the TSA adsorption unit of this utility model.

[0033] Figure 2 This is a schematic diagram of the activated carbon adsorption unit of this utility model.

[0034] In the diagram, 1. TSA adsorption unit; 101. TSA adsorption tower A; 102. TSA adsorption tower B; 103. TSA adsorption tower C; 2. Programmable control valve; 3. Activated carbon adsorption hydrogen discharge pipeline; 4. Gas outlet pipeline; 5. Product hydrogen discharge pipeline; 6. Hydrogen compressor; 7. Hydrogen inlet pipeline; 8. Pressurized hydrogen outlet pipeline; 9. Cooler; 10. Hydrogen buffer tank; 1101. Activated carbon adsorption tower A; 1102. Activated carbon adsorption tower B; 12. Pressure relief valve. Pipelines; 13. Hydrogen recovery pipeline; 14. Control valve; 15. Filter cartridge dust collector; 16. Regenerated hydrogen feed pipeline; 17. Regenerated hydrogen branch pipeline one; 18. Regenerated hydrogen branch pipeline two; 19. Regenerated hydrogen heater; 20. Regenerated hydrogen discharge pipeline; 21. Regenerated hydrogen vent pipeline; 22. Regenerated hydrogen recovery branch pipeline; 23. Cyclone separator; 24. Gas-water separator; 25. Baghouse dust collector one; 26. Adsorption dryer; 27. Baghouse dust collector two. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model.

[0036] Example 1

[0037] This embodiment provides an industrial by-product hydrogen purification system, including, as follows: Figure 2 The activated carbon adsorption unit shown and such Figure 1 The TSA adsorption unit 1 shown is connected to the activated carbon adsorption unit via the activated carbon adsorption hydrogen outlet pipeline 3. After the hydrogen gas passes through the activated carbon adsorption unit and the TSA adsorption unit 1 for adsorption treatment, the final product hydrogen gas is obtained, thus completing the purification of the by-product hydrogen.

[0038] Among them, such as Figure 2As shown, the activated carbon adsorption unit includes a hydrogen compressor 6, which is connected to a hydrogen inlet pipeline 7 and a cooler 9 via a pressurized hydrogen outlet pipeline 8. The cooler 9 is connected to a hydrogen buffer tank 10 via a pipeline. The hydrogen compressor 6 pressurizes the by-product hydrogen to 2±0.5 MPa, while simultaneously recovering a large amount of organic components entrained in the hydrogen. The cooler 9 uses chilled brine to cool the pressurized hydrogen to below 10°C, while simultaneously buffering it in the hydrogen buffer tank 10, further recovering the organic components entrained in the hydrogen.

[0039] like Figure 2 As shown, the hydrogen buffer tank 10 is connected to the inlets of activated carbon adsorption towers A1101 and B1102 via pipelines. The outlets of activated carbon adsorption towers A1101 and B1102 are connected to activated carbon adsorption hydrogen discharge pipelines 3. Activated carbon adsorption towers A1101 and B1102 are connected in series via pipelines, and programmable valves 2 are installed on these pipelines. Cooled hydrogen enters activated carbon adsorption towers A1101 and B1102 for organic component adsorption. Activated carbon adsorption towers A1101 and B1102 can operate as a single tower or in series via the programmable valves 2. If one activated carbon adsorption tower malfunctions, it can be disconnected via the programmable valves 2, and the other activated carbon adsorption tower can be used for adsorption, ensuring the continuity of the activated carbon adsorption unit.

[0040] Subsequently, the hydrogen gas, after being treated by activated carbon adsorption, enters TSA adsorption unit 1 for further adsorption and purification. Specifically, as follows... Figure 1As shown, the TSA adsorption unit 1 includes TSA adsorption tower A101, TSA adsorption tower B102 and TSA adsorption tower C103. TSA adsorption towers A101, B102 and C103 are connected by pipelines to realize the series connection of TSA adsorption towers A101, B102 to C103, B102 and C103 to A101, and C103 and B101 to B102. Specifically, a pipeline connects the top outlet of TSA adsorption tower A101 to the bottom inlet of TSA adsorption tower B102, a pipeline connects the top outlet of TSA adsorption tower B102 to the bottom inlet of TSA adsorption tower C103, and a pipeline connects the top outlet of TSA adsorption tower C103 to the bottom inlet of TSA adsorption tower A101. Each pipeline is equipped with a programmable valve 2. During normal operation, the three TSA adsorption towers A101, B102, and C103 are used in series. The hydrogen purification process can proceed from TSA adsorption tower A101 and B102 to TSA adsorption tower C103, or from TSA adsorption tower B102 and C103 to TSA adsorption tower A101, or from TSA adsorption tower C103 and A101 to TSA adsorption tower B102.

[0041] At the same time, such as Figure 1As shown, the activated carbon adsorption hydrogen discharge pipeline 3 is connected to a bag filter 25 and an adsorption dryer 26, and is connected to the inlets of TSA adsorption towers A101, B102, and C103 via pipelines. A programmable valve 2 is installed on the pipeline. The hydrogen treated by activated carbon adsorption passes through the bag filter 25 and the adsorption dryer 26 for dust removal and drying, and then the programmable valve 2 opens and closes, allowing the hydrogen to enter the TSA adsorption unit 1 from TSA adsorption towers A101, B102, or C103. The outlets of TSA adsorption towers A101, B102, and C103 are connected to the product hydrogen discharge pipeline 5 via outlet pipelines 4, and a programmable valve 2 is installed on the outlet pipelines 4. Taking the sequential adsorption treatment of hydrogen through TSA adsorption towers A101, B102, and C103 as an example, the programmable valve 2 on the top outlet pipeline 4 of TSA adsorption towers A101 and B102 is opened and closed, and the programmable valve 2 on the top outlet pipeline 4 of TSA adsorption tower C103 is opened. Hydrogen then enters the product hydrogen outlet pipeline 5 from the top outlet pipeline 4 of TSA adsorption tower C103. A bag filter 27 is connected to the product hydrogen outlet pipeline 5. After adsorption treatment, the hydrogen undergoes further dust removal through the bag filter 27, completing the hydrogen purification process.

[0042] Example 2

[0043] Based on Example 1, hydrogen detectors are installed at the outlets of TSA adsorption towers A101, B102, and C103 to monitor the hydrogen concentration at these outlets. If the hydrogen concentration at the outlet of any TSA adsorption tower is found to be substandard, it indicates that the treated hydrogen contains excessive impurities, and that TSA adsorption tower needs to be removed from the system for regeneration. The other two TSA adsorption towers continue to operate in series. The regeneration of the TSA adsorption towers can be achieved as follows:

[0044] (1) Switching preparation

[0045] Taking the sequential adsorption treatment of hydrogen through TSA adsorption tower A101, TSA adsorption tower B102 and TSA adsorption tower C103 as an example, when the hydrogen concentration at the outlet of TSA adsorption tower C103 does not meet the standard, the system automatically cuts it off: closes the pipeline between TSA adsorption tower B102 and TSA adsorption tower C103 and the programmable valve 2 on the top outlet pipeline 4 of TSA adsorption tower C103, and opens the programmable valve 2 on the top outlet pipeline 4 of TSA adsorption tower B102.

[0046] (2) Pressure relief

[0047] The air inlets of TSA adsorption towers A101, B102, and C103 are respectively connected to pressure relief pipelines 12. Pressure relief pipelines 12 are connected to hydrogen recovery pipelines 13. A filter-type dust collector 15 is connected to the hydrogen recovery pipeline 13. Programmable control valves 2 are installed on pressure relief pipelines 12 and hydrogen recovery pipelines 13 respectively. A control valve 14 is installed on pressure relief pipeline 12.

[0048] Because the TSA adsorption tower operates at a high pressure of 2 MPa, it is necessary to slowly reduce the pressure to atmospheric pressure (around 0.1 MPa) first to avoid damage to the adsorbent or equipment due to sudden pressure changes during high-temperature regeneration. The specific operation is as follows: open the programmable valve 2 on the pressure relief pipeline 12 at the bottom of the TSA adsorption tower C103, and control the pressure relief rate (preset valve position) through the control valve 14 on the pressure relief pipeline 12 to recover the high-pressure hydrogen in the TSA adsorption tower C103.

[0049] (3) Heating regeneration

[0050] Heating medium: hydrogen gas from the product;

[0051] The temperature of the adsorbent inside the TSA adsorption tower is 250℃ during regeneration.

[0052] The heating process is as follows:

[0053] The outlets of TSA adsorption towers A101, B102, and C103 are connected to a regenerated hydrogen feed line 16. The regenerated hydrogen feed line 16 is connected to a regenerated hydrogen branch line 17 and a regenerated hydrogen branch line 2 18. A regenerated hydrogen heater 19 is connected to the regenerated hydrogen branch line 17. The regenerated hydrogen branch line 17 and the regenerated hydrogen branch line 2 18 are respectively connected to the regenerated hydrogen feed line 16, the regenerated hydrogen branch line 17, and the regenerated hydrogen branch line 2 18. A control valve 14 is installed on the regenerated hydrogen branch line 2 18. The inlets of TSA adsorption towers A101, B102, and C103 are respectively connected to regenerated hydrogen outlet pipelines 20. The regenerated hydrogen outlet pipelines 20 are respectively connected to regenerated hydrogen vent pipelines 21 and regenerated hydrogen recovery branch pipelines 22. A cyclone separator 23 is connected to the regenerated hydrogen vent pipeline 21. A gas-liquid separator 24 is connected to the regenerated hydrogen recovery branch pipeline 22, and the regenerated hydrogen recovery branch pipeline 22 is connected to the recovered hydrogen pipeline 13. A programmable valve 2 is installed on each of the regenerated hydrogen outlet pipelines 20, regenerated hydrogen vent pipelines 21, and regenerated hydrogen recovery branch pipelines 22.

[0054] When regenerating TSA adsorption tower C103, open the programmable valve 2 on the regenerated hydrogen branch line 17, the regenerated hydrogen feed line 16, the regenerated hydrogen discharge line 20 at the bottom of TSA adsorption tower C103, and the regenerated hydrogen vent line 21. Product hydrogen can be used for regeneration. The regenerated hydrogen enters from the top of TSA adsorption tower C103 and exits from the bottom, passing through the cyclone separator 23 to the regenerated hydrogen vent line 21. Start the regenerated hydrogen heater 19 and gradually heat it to a stable temperature of 250°C. The heated regenerated hydrogen is introduced from the top of TSA adsorption tower C103, flowing downwards through the adsorbent bed, where heat conduction raises the temperature of the adsorbent. Moisture and impurities adsorbed by the adsorbent desorb due to the increased temperature and are discharged from the bottom of the tower to the regenerated hydrogen vent line 21 with the gas flow.

[0055] Temperature control points: Continue heating until the outlet gas temperature of the TSA adsorption tower C103 is close to that of the inlet, indicating that the adsorbent has been fully heated.

[0056] (4) Hot blowing (enhanced desorption)

[0057] Heated regenerated hydrogen is continuously introduced (maintaining the regeneration temperature at 250°C) to further purge the adsorbent bed, completely removing any desorbed residual impurities. This stage can be considered an extension of the heating regeneration process, ensuring no residual adsorbate remains on the adsorbent surface and improving regeneration efficiency. The impurity concentration in the outlet gas gradually decreases until it approaches the purity of the heated regenerated hydrogen.

[0058] (5) Cooling (restoring adsorption capacity)

[0059] Cold blowing medium: Low-temperature hydrogen gas is introduced from the top of the TSA adsorption tower C103 to cool the adsorbent from top to bottom.

[0060] The purpose of cooling is to reduce the temperature of the adsorbent to the adsorption operating temperature (below 30℃) to restore its low-temperature adsorption activity; and to prevent the condensation of moisture in the gas due to temperature difference when the high-temperature adsorbent is directly put into operation, which would affect the adsorption effect.

[0061] Cooling endpoint: The temperature of the adsorbent bed drops below 30°C (or is set according to process requirements), and the outlet gas temperature is close to the temperature of the cooling medium.

[0062] The cooling process is as follows:

[0063] Close the programmable valve 2 on regenerated hydrogen branch line 17 and regenerated hydrogen vent line 21, and open the programmable valve 2 on regenerated hydrogen branch line 28, regenerated hydrogen recovery branch line 22 and recovery hydrogen line 13. Control the amount of cooling hydrogen through the control valve 14 on regenerated hydrogen branch line 28 until it drops to 30°C.

[0064] (6) Pressurization

[0065] After cooling, the TSA adsorption tower C103 needs to be slowly pressurized to the operating pressure of 2 MPa by product hydrogen from the top of the tower. The pressurization process is as follows:

[0066] The preset valve position of the control valve 14 on the regenerated hydrogen branch line 2 18 is automatically adjusted, and the programmable valve 2 on the regenerated hydrogen outlet line 20, the regenerated hydrogen recovery branch line 22, and the recovery hydrogen line 13 at the bottom of the TSA adsorption tower C103 is closed, and the pressure is slowly increased to 2MPa.

[0067] (7) Cut-in adsorption

[0068] After the C103 adsorption tower of TSA is pressurized to the working pressure of 2MPa, a pressure holding switch is performed:

[0069] 1) Pressure holding

[0070] Close the programmable valve 2 on the regenerated hydrogen branch line 2 18, the regenerated hydrogen feed line 16, and the control valve 14 on the regenerated hydrogen branch line 2 18.

[0071] 2) Switch

[0072] Close the programmable valve 2 on the top outlet pipeline 4 of TSA adsorption tower B102, and open the programmable valve 2 on the pipeline between TSA adsorption tower B102 and TSA adsorption tower C103, as well as on the top outlet pipeline 4 of TSA adsorption tower C103. Then, after TSA adsorption tower C103 is put into operation, hydrogen will be adsorbed sequentially from TSA adsorption tower A101, TSA adsorption tower B102 to TSA adsorption tower C103.

[0073] Example 3

[0074] The adsorbents used in TSA adsorption towers A101, B102, and C103 consist of the following five-layer structure:

[0075] 1) Top layer adsorbent: O2 adsorption layer, using lithium-based molecular sieve (to remove O2 molecules).

[0076] Principle: Introducing Li through ion exchange + Subsequently, the surface polarity of the molecular sieve increases, enhancing its ability to react with O2 (kinetic diameter). The chemical adsorption capacity of Li was significantly improved. + It forms a weak coordination bond with O2, but hardly adsorbs H2.

[0077] Adsorption capacity: LiX molecular sieves can adsorb up to 20 wt.% of O2 at 25℃ and 1 atm, which is 1.5 times that of ordinary 13X, and the selectivity for O2 is much higher than that for N2 / Ar.

[0078] 2) Middle layer adsorbent: C4 adsorption layer, using 5A molecular sieve (effectively removes C4 components).

[0079] Principle: Through pore size sieving and polar adsorption, C4 hydrocarbons (such as butane and butene) are selectively adsorbed, while hydrogen molecules (small in diameter) can pass through smoothly.

[0080] 3) Middle layer adsorbent: N2 / Ar adsorption layer, using 13X molecular sieve (effectively removes N2 / Ar).

[0081] Principle: The pore size of 13X molecular sieve is approximately... Adsorption kinetic diameter < The molecule. N2 (kinetic diameter) Ar While its polarity is weak, 13X achieves adsorption through a combination of porous sieving and weak van der Waals forces, thus enhancing its effectiveness against H2. The adsorption capacity of H2 molecules is extremely weak (because H2 molecules are small and nonpolar), thus achieving separation.

[0082] Adsorption capacity: At 25℃ and 1 atm, 13X adsorbs approximately 12 wt.% of N2 and approximately 15 wt.% of Ar, which is much higher than that of H2 (<1 wt.%).

[0083] 4) Middle layer adsorbent: H2O adsorption layer, using 4A molecular sieve: (effectively removes H2O)

[0084] Function: Deeply removes water vapor (dew point drops to below -60℃). The adsorption capacity of 4A molecular sieve for H2O can reach 20wt.% at 25℃ and RH=50%, which is higher than that of alumina (15wt.%).

[0085] 5) Bottom layer adsorbent: Pretreatment protective layer, using alumina ceramic balls, adsorbs most of the moisture in H2 and protects the upper molecular sieve.

[0086] Material: Activated alumina.

[0087] The impurity components in the hydrogen gas at the outlet of the activated carbon adsorption unit are as follows: purity 99.90%, C4 (0.075%), N2+Ar (0.015%), and O2 (0.001%). This invention adopts the TSA process, relying on the selective adsorption capacity of the above-mentioned adsorbent to effectively remove C4, trace amounts of oxygen, nitrogen, and argon from the hydrogen gas, thereby increasing the hydrogen purity to over 99.999%.

[0088] Adsorbents (molecular sieves, activated alumina) exhibit strong adsorption capacity at low temperatures, but their adsorption capacity weakens at high temperatures. By heating a saturated TSA adsorption tower, adsorbed substances (such as water vapor and impurities) are desorbed. The desorbed substances are then removed by a cold air stream, restoring the adsorbent's activity. TSA adsorption tower regeneration achieves the reuse of the adsorbent through a cycle of "heat desorption - cooling activation."

Claims

1. An industrial by-product hydrogen purification system, characterized in that, The system includes an activated carbon adsorption unit and a TSA adsorption unit (1). The activated carbon adsorption unit and the TSA adsorption unit (1) are connected by an activated carbon adsorption hydrogen discharge pipeline (3). The TSA adsorption unit (1) includes a TSA adsorption tower A (101), a TSA adsorption tower B (102), and a TSA adsorption tower C (103). The TSA adsorption towers A (101), B (102), and C (103) are connected by pipelines to realize the series connection of TSA adsorption towers A (101), B (102), and C (103), and the series connection of TSA adsorption towers B (102), C (103), and A (103). (101) are connected in series, as are TSA adsorption tower C (103), TSA adsorption tower A (101) and TSA adsorption tower B (102), and each pipeline is equipped with a programmable valve (2); the activated carbon adsorption hydrogen outlet pipeline (3) is connected to the inlet of TSA adsorption tower A (101), TSA adsorption tower B (102) and TSA adsorption tower C (103) respectively, and the pipeline is equipped with a programmable valve (2); the outlet of TSA adsorption tower A (101), TSA adsorption tower B (102) and TSA adsorption tower C (103) is connected to the product hydrogen outlet pipeline (5) respectively through the outlet pipeline (4), and the outlet pipeline (4) is equipped with a programmable valve (2).

2. The industrial by-product hydrogen purification system as described in claim 1, characterized in that, The activated carbon adsorption unit includes a hydrogen compressor (6), which is connected to a hydrogen inlet pipeline (7) and a cooler (9) via a pressurized hydrogen outlet pipeline (8). The cooler (9) is connected to a hydrogen buffer tank (10) via a pipeline. The hydrogen buffer tank (10) is connected to the inlets of activated carbon adsorption tower A (1101) and activated carbon adsorption tower B (1102) via pipelines. The outlets of activated carbon adsorption tower A (1101) and activated carbon adsorption tower B (1102) are connected to activated carbon adsorption hydrogen discharge pipelines (3). Activated carbon adsorption tower A (1101) and activated carbon adsorption tower B (1102) are connected in series via pipelines, and programmable valves (2) are installed on the pipelines.

3. The industrial by-product hydrogen purification system as described in claim 1, characterized in that, Hydrogen detectors are installed at the outlets of the TSA adsorption towers A (101), B (102), and C (103).

4. The industrial by-product hydrogen purification system as described in claim 3, characterized in that, The inlets of the TSA adsorption tower A (101), TSA adsorption tower B (102), and TSA adsorption tower C (103) are respectively connected to pressure relief pipelines (12), and the pressure relief pipelines (12) are connected to hydrogen recovery pipelines (13). Programmable control valves (2) are respectively installed on the pressure relief pipelines (12) and hydrogen recovery pipelines (13), and control valves (14) are installed on the pressure relief pipelines (12).

5. The industrial by-product hydrogen purification system as described in claim 4, characterized in that, A cartridge dust collector (15) is connected to the hydrogen recovery pipeline (13).

6. The industrial by-product hydrogen purification system as described in claim 4, characterized in that, The outlets of the TSA adsorption towers A (101), B (102), and C (103) are connected to a regenerated hydrogen feed line (16). The regenerated hydrogen feed line (16) is connected to a regenerated hydrogen branch line one (17) and a regenerated hydrogen branch line two (18). A regenerated hydrogen heater (19) is connected to the regenerated hydrogen branch line one (17). The regenerated hydrogen branch line one (17) and the regenerated hydrogen branch line two (18) are respectively connected to the regenerated hydrogen pipeline. A programmable controller is installed on the regenerated hydrogen feed line (16), the regenerated hydrogen branch line one (17), and the regenerated hydrogen branch line two (18). Valve (2), control valve (14) is installed on the second branch line (18) of regenerated hydrogen; the inlets of TSA adsorption tower A (101), TSA adsorption tower B (102) and TSA adsorption tower C (103) are respectively connected to the regenerated hydrogen outlet line (20), the regenerated hydrogen outlet line (20) is respectively connected to the regenerated hydrogen vent line (21) and the regenerated hydrogen recovery branch line (22), the regenerated hydrogen recovery branch line (22) is connected to the recovery hydrogen line (13), and programmable valve (2) is installed on the regenerated hydrogen outlet line (20), the regenerated hydrogen vent line (21) and the regenerated hydrogen recovery branch line (22).

7. The industrial by-product hydrogen purification system as described in claim 6, characterized in that, A cyclone separator (23) is connected to the regenerated hydrogen venting pipeline (21).

8. The industrial by-product hydrogen purification system as described in claim 6, characterized in that, A steam-water separator (24) is connected to the regenerated hydrogen recovery branch line (22).

9. The industrial by-product hydrogen purification system as described in claim 1, characterized in that, The activated carbon adsorption hydrogen discharge pipeline (3) is connected to a bag filter (25) and an adsorption dryer (26).

10. The industrial by-product hydrogen purification system as described in claim 1, characterized in that, The product hydrogen discharge pipeline (5) is connected to a bag filter (27).

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