Regeneration system for stable temperature rise of pressure swing adsorption device

Abstract

The utility model discloses a regeneration system for stable temperature rise of a pressure swing adsorption device. The bottom of each pressure swing adsorption tower is connected to a feed gas inlet header pipe through a feed gas branch pipeline, and each feed gas branch pipeline is provided with a purification inlet valve; the feed gas inlet main pipe is provided with a feed gas valve, a flowmeter, an electric heater and a purification main valve; an inlet of the flowmeter is connected with a nitrogen pipeline; the top of each pressure swing adsorption tower is connected to an outlet of a regeneration gas inlet header pipe through a regeneration gas inlet branch pipeline, an inlet of the regeneration gas inlet header pipe is connected to an outlet of an electric heater, and each regeneration gas inlet branch pipeline is provided with an 8-shaped blind plate, a regeneration inlet valve and a regeneration inlet pressure gauge; the bottom of each pressure swing adsorption tower is connected to the desorption gas tank through a regenerated gas outlet branch pipeline; and each regenerated gas outlet branch pipeline is provided with a regenerated outlet thermometer, a regenerated outlet pressure gauge and a regenerated outlet valve. According to the utility model, temperature rise and temperature drop are synchronously completed in the regeneration process of the pressure swing adsorption tower, and the regeneration effect is consistent.

Description

TECHNICAL FIELD

[0001] The utility model relates to adsorbent purification technical field more specifically, it is a kind of regeneration system of stable temperature rise of pressure swing adsorption device. BACKGROUND

[0002] Pressure swing adsorption process is based on physical adsorption work, the process uses the contact of solid adsorbent in adsorbent bed and inlet gas to selectively adsorb specific component in mixed gas under higher pressure, so that the specific component gas is reduced when product gas is enriched. This design can selectively remove impurities to meet the requirements of gas quality specifications, and the regeneration process does not need heating, and the adsorbent will not fail due to the effect of heat and humidity, and the service life of the adsorbent material can be very long.

[0003] The existing pressure swing adsorption device is prone to cause impurities to penetrate or reconstituents and polar substances to enter the pores of the adsorbent when running at high load, which is difficult to remove at normal temperature, resulting in a decrease in adsorption capacity and a significant decrease in product recovery rate, thereby increasing the production and operation cost.

[0004] The current regeneration method has defects, and cannot guarantee the consistency of the flow rate inside the adsorption tower and the uniformity of the temperature rise rate of each pressure swing adsorption tower, which causes the temperature rise rate of part of the pressure swing adsorption tower to be too fast during the regeneration process, resulting in problems such as adsorbent caking and damage to part of the adsorbent in the pressure swing adsorption tower. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the defects in the prior art, and provides a regeneration system for stable temperature rise of pressure swing adsorption device, which can ensure the completion of temperature rise and temperature drop simultaneously during the regeneration process of pressure swing adsorption tower and the consistency of regeneration effect through online monitoring and control.

[0006] The utility model aims at overcoming the defects in the prior art, and provides a regeneration system for stable temperature rise of pressure swing adsorption device, which can ensure the completion of temperature rise and temperature drop simultaneously during the regeneration process of pressure swing adsorption tower and the consistency of regeneration effect through online monitoring and control.

[0007] The regeneration system for stable temperature rise of pressure swing adsorption device of the utility model, including N pressure swing adsorption towers, the tower top gas port of each pressure swing adsorption tower is connected with product gas pipeline, the tower bottom gas port of each pressure swing adsorption tower is connected to raw material gas inlet main pipe through raw material gas branch pipeline, each product gas pipeline is provided with purification outlet valve, each raw material gas branch pipeline is provided with purification inlet valve;The raw material gas valve, flowmeter, electric heater and purification total valve are sequentially arranged on the raw material gas inlet main pipe along the gas flow direction, the flowmeter inlet is also connected with nitrogen gas pipeline, and a nitrogen valve is arranged on the nitrogen gas pipeline;

[0008] The overhead gas port of each pressure swing adsorption tower is connected to the outlet end of a regeneration gas inlet manifold through a regeneration gas inlet branch pipeline respectively, the gas inlet end of the regeneration gas inlet manifold is connected to the outlet of an electric heater, and an 8-shaped blind plate, a regeneration inlet valve and a regeneration inlet pressure gauge are sequentially arranged on each regeneration gas inlet branch pipeline in the gas flow direction, and the regeneration gas inlet manifold is provided with a regeneration gas total valve; the bottom gas port of each pressure swing adsorption tower is connected to a desorption gas tank through a regeneration gas outlet branch pipeline respectively, and a regeneration outlet thermometer, a regeneration outlet pressure gauge and a regeneration outlet valve are arranged on each regeneration gas outlet branch pipeline.

[0009] Further, the number N of the pressure swing adsorption towers is set to 2-10, and the pressure swing adsorption towers are connected in parallel to each other.

[0010] Compared with the prior art, the technical scheme of the utility model has the beneficial effects that:

[0011] (1) The utility model retains the purification system of the pressure swing adsorption tower, and increases the adsorbent regeneration system, so that the on-line regeneration function of the pressure swing adsorption tower can be realized, and the on-line regeneration function of the adsorbent in the pressure swing adsorption tower in the positive direction can be ensured.

[0012] (2) The regeneration inlet pressure gauges and the regeneration outlet pressure gauges at the top and the bottom of each pressure swing adsorption tower are read, and then the regeneration inlet valves and the regeneration outlet valves at the top and the bottom of each pressure swing adsorption tower are adjusted, so that the pressure difference in each pressure swing adsorption tower is consistent, and then the internal flow of each pressure swing adsorption tower is consistent.

[0013] (3) In the utility model, the regeneration outlet thermometers of the pressure swing adsorption towers are checked under the action of the electric heater, the regeneration inlet valves and the regeneration outlet valves at the top and the bottom of each pressure swing adsorption tower are adjusted, the internal flow of the pressure swing adsorption tower is increased or decreased, the purpose of synchronous temperature rise or temperature drop of each adsorption tower is achieved, the temperature rise rate of each pressure swing adsorption tower is consistent, the temperature rise of the system pressure swing adsorption tower is synchronous, the problems of overburning of the adsorbent and temperature deficiency do not occur, the damage of the adsorbent in the pressure swing adsorption tower in the regeneration process is avoided, and the consistency of the regeneration effect of the adsorbent is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a regeneration system schematic view of the stable temperature rise of the pressure swing adsorption device.

[0015] Figure reference numerals: 1-Raw gas valve, 2-Nitrogen valve, 3-Flow meter, 4-Electric heater, 5-Regenerated gas main valve, 6-Purification main valve, 7-Raw gas inlet main pipe, 8-Nitrogen pipeline, 9-Regenerated gas inlet main pipe, 10(1)~10(N)-Purification inlet valve, 11(1)~11(N)-Raw gas branch pipeline, 12(1)~12(N)-Product gas pipeline, 13(1)~13(N)-Purification outlet valve, 14(1)~1 4(N) - Regeneration gas inlet branch line, 15(1)~15(N) - Figure-8 blind flange, 16(1)~16(N) - Regeneration inlet valve, 17(1)~17(N) - Regeneration inlet pressure gauge, 18(1)~18(N) - Regeneration gas outlet branch line, 19(1)~19(N) - Regeneration outlet thermometer, 20(1)~20(N) - Regeneration outlet pressure gauge, 21(1)~21(N) - Regeneration outlet valve, 22 - Desorption gas tank. Detailed Implementation

[0016] The present invention will now be further described with reference to the accompanying drawings.

[0017] like Figure 1 As shown, the regeneration system for stabilizing temperature rise of the pressure swing adsorption device of this invention includes N pressure swing adsorption towers connected in parallel, where N can generally be 2 to 10.

[0018] Each pressure swing adsorption tower has a product gas pipeline (i.e., 12(1) to 12(N)) at its top, and each product gas pipeline is equipped with a purification outlet valve (i.e., 13(1) to 13(N)). Each pressure swing adsorption tower has a product gas pipeline (i.e., 11(1) to 11(N)) at its bottom, which is connected to the raw material gas inlet main pipe 7 via a raw material gas branch pipeline (i.e., 11(1) to 11(N)). Each raw material gas branch pipeline is equipped with a purification inlet valve (i.e., 10(1) to 10(N)). The raw material gas inlet main pipe 7 is equipped with a raw material gas valve 1, a flow meter 3, an electric heater 4, and a purification main valve 6 in sequence along the gas flow direction. The inlet of the flow meter 3 is also connected to a nitrogen pipeline 8, and a nitrogen valve 2 is installed on the nitrogen pipeline 8.

[0019] Each of the pressure swing adsorption towers has its top gas inlet connected to the outlet of the regeneration gas inlet main pipe 9 via a regeneration gas inlet branch pipe (i.e., 14(1)~14(N)). The inlet end of the regeneration gas inlet main pipe 9 is connected to the outlet of the electric heater 4. The regeneration gas inlet main pipe 9 is equipped with a regeneration gas main valve 5. Each of the regeneration gas inlet branch pipes (i.e., 14(1)~14(N)) is equipped with a figure-eight blind flange (i.e., 15(1)~15(N)), a regeneration inlet valve (i.e., 16(1)~16(N)), and a regeneration inlet pressure gauge (i.e., 17(1)~17(N)) in sequence along the gas flow direction. The bottom gas inlet of each pressure swing adsorption tower is connected to the desorption gas tank 22 through a regeneration gas outlet branch pipeline (i.e., 18(1)~18(N)). Each regeneration gas outlet branch pipeline (i.e., 18(1)~18(N)) is equipped with a regeneration outlet thermometer (i.e., 19(1)~19(N)), a regeneration outlet pressure gauge (i.e., 20(1)~20(N)), and a regeneration outlet valve (i.e., 21(1)~21(N)).

[0020] In the above system, the raw material gas valve 1, flow meter 3, raw material gas inlet main pipe 7, electric heater 4, purification main valve 6, purification inlet valves 10(1)~10(N), raw material gas branch pipes 1(1)~11(N), pressure swing adsorption tower 1~N, product gas pipes 12(1)~12(N), and purification outlet valves 13(1)~13(N) constitute the purification system of this utility model. Nitrogen valve 2, nitrogen pipe 8, regeneration gas main valve 5, regeneration gas inlet main pipe 9, and regeneration gas inlet are also included. Branch pipes 14(1)~14(N), figure-eight blind flange 15(1)~15(N), regeneration inlet valve 16(1)~16(N), regeneration inlet pressure gauge 17(1)~17(N), regeneration gas outlet branch pipe 18(1)~18(N), regeneration outlet thermometer 19(1)~19(N), regeneration outlet pressure gauge 20(1)~20(N), regeneration outlet valve 21(1)~21(N), and desorption gas tank 22 constitute the adsorbent regeneration system of this utility model.

[0021] Raw material gas purification process: In the regeneration system of the pressure swing adsorption device of this utility model with stable temperature rise, nitrogen valve 2, regeneration gas main valve 5, regeneration inlet valve 16(1)~16(N) and regeneration outlet valve 21(1)~21(N) are all closed, figure-eight blind flange 15(1)~15(N) are all blind, and all other valves are open. At this time, the adsorbent regeneration system is closed and the purification system is running normally, which can effectively isolate the adsorbent regeneration system and the purification system. The raw material gas to be purified can be purified normally using the purification system, and the product gas is obtained after purification.

[0022] For example, the raw gas to be purified can be any one of hydrogen, nitrogen, carbon monoxide, or helium, and the corresponding product gas can be one of hydrogen, nitrogen, carbon monoxide, or helium that meets the purity requirements.

[0023] Adsorbent regeneration process: When the purity of the product gas does not meet the requirements, the purification system needs to be shut down and the adsorbent regeneration system needs to be started. Specifically, close the raw material gas valve 1, the main purification valve 6, each purification inlet valve 10(1)~10(N), and each purification outlet valve 13(1)~13(N), and open the nitrogen valve 2, the main regeneration gas valve 5, each regeneration inlet valve 16(1)~16(N), and each regeneration outlet valve 21(1)~21(N), and all figure-eight blind flanges 15(1)~15(N) are connected. Nitrogen gas enters the adsorbent regeneration system through a nitrogen pipeline, passes through flow meter 3 and electric heater 4 (for controlling nitrogen temperature), and then through the main regeneration gas valve 5. The regeneration inlet valves 16(1) to 16(N) are adjusted to evenly distribute the gas to multiple pressure swing adsorption towers. Pressure gauges 17(1) to 17(N) and 20(1) to 20(N) at each regeneration inlet are read. The regeneration outlet valves 21(1) to 21(N) are adjusted to maintain consistent internal flow and inlet / outlet pressure differential in each pressure swing adsorption tower. The regeneration outlet thermometer 1 is checked. 9(1)~19(N), by adjusting the regeneration inlet valve 16(1)~16(N) and the regeneration outlet valve 21(1)~21(N), ensure that the internal temperature rise of each pressure swing adsorption tower is consistent, and finally discharge into the desorption gas tank 22; if there is a temperature rise difference in a certain pressure swing adsorption tower, by adjusting the corresponding regeneration inlet valve 16(1)~16(N) and the regeneration outlet valve 21(1)~21(N), increase or decrease the internal flow of the pressure swing adsorption tower to achieve the purpose of synchronous temperature rise or temperature drop of each pressure swing adsorption tower, and ensure that the temperature rise rate of each pressure swing adsorption tower is consistent.

[0024] Although the functions and working processes of this utility model have been described above in conjunction with the accompanying drawings, this utility model is not limited to the specific functions and working processes described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this utility model without departing from the spirit and scope of the claims, and all of these are within the protection scope of this utility model.

Claims

1. A regeneration system for stabilizing temperature rise of a pressure swing adsorption device, comprising N pressure swing adsorption towers, a product gas pipeline connected to a tower top gas port of each of the pressure swing adsorption towers, and a raw material gas inlet main connected to a tower bottom gas port of each of the pressure swing adsorption towers through a raw material gas branch pipeline, characterized in that, Each of the product gas pipeline is provided with a purification outlet valve, and each of the raw material gas branch pipeline is provided with a purification inlet valve; the raw material gas inlet manifold is sequentially provided with a raw material gas valve, a flow meter, an electric heater and a purification total valve along a gas flow direction, and the flow meter inlet is further connected with a nitrogen gas pipeline, and the nitrogen gas pipeline is provided with a nitrogen gas valve; The top gas outlet of each of the pressure swing adsorption towers is connected to the outlet end of a regeneration gas inlet manifold through a regeneration gas inlet branch pipeline, the inlet end of the regeneration gas inlet manifold is connected to the outlet of the electric heater, and each of the regeneration gas inlet branch pipelines is sequentially provided with an 8-shaped blind plate, a regeneration inlet valve and a regeneration inlet pressure gauge along the gas flow direction, and the regeneration gas inlet manifold is provided with a regeneration gas total valve; the bottom gas outlet of each of the pressure swing adsorption towers is connected to a desorption gas tank through a regeneration gas outlet branch pipeline, and each of the regeneration gas outlet branch pipelines is provided with a regeneration outlet thermometer, a regeneration outlet pressure gauge and a regeneration outlet valve.

2. The regeneration system for stabilizing temperature rise of a pressure swing adsorption apparatus according to claim 1, characterized by The number N of the pressure swing adsorption towers is set to 2-10, and the pressure swing adsorption towers are connected in parallel with each other.

Images