Conversion hydrogen production device capable of recycling diffused desorbed gas

Abstract

The utility model relates to a conversion hydrogen production device capable of recycling diffused desorbed gas, which comprises an adsorption tower, the bottom surface of the adsorption tower is fixedly connected with a first-stage pipeline, the bottom end of the first-stage pipeline is fixedly connected with a purging desorbed gas first-stage pipeline, and the purging desorbed gas first-stage pipeline is connected with a purging desorbed gas diode pipeline. A purging and desorbing gas sequencing valve is mounted on the purging and desorbing gas diode circuit; the side wall of the first-stage pipeline is fixedly connected with a reverse desorption gas first-stage pipeline, the reverse desorption gas first-stage pipeline is connected with a reverse desorption gas diode pipeline, and a reverse desorption gas program control valve is installed on the reverse desorption gas diode pipeline. A desorption gas main pipe is connected to the pipe wall of the first-stage purging desorption gas pipeline, one end of the desorption gas main pipe is fixedly connected with a Roots blower, one end of the Roots blower is connected with a fuel gas pipe network, and a desorption gas main pipe program control valve is installed on the desorption gas main pipe. The hydrogen production device has the beneficial effects that the emission of desorbed gas is effectively controlled and reduced, so that a more environment-friendly and more efficient hydrogen production process is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production equipment, in particular to a conversion hydrogen production device capable of recycling and utilizing emitted and desorbed gas. Background Art

[0002] At present, in the domestic conversion and hydrogen production process, there is a phenomenon of large-scale release of PSA desorption gas. This is because in order to ensure the purity of the product gas, the PSA system must discharge the impurity gas adsorbed by itself to meet the purpose of re-adsorption; the release not only wastes energy and pollutes the environment, but also the released desorption gas has a serious impact on the safety of surrounding equipment and operators.

[0003] At present, in the process of hydrogen production by conversion in China, the large amount of PSA desorption gas emission has become a key challenge. During the operation of the PSA system, in order to ensure the purity of the hydrogen produced, the impurity gas adsorbed by itself must be discharged. This process is to meet the need for re-adsorption to ensure the purity of the hydrogen. However, this emission process brings a series of problems.

[0004] First, a large amount of desorbed gas is released, which consumes a lot of energy. This not only increases production costs, but also creates an unnecessary burden on the environment. At the same time, these emitted gases will also pollute the surrounding environment, affect air quality, and may even pose a potential threat to human health.

[0005] Secondly, the released desorbed gas poses a serious threat to the safety of surrounding equipment and operators. If these gases are not properly handled and controlled, they may interfere with the operation of the equipment and even cause damage to the equipment. At the same time, if the workers are in the environment of these harmful gases for a long time, it may also affect their health.

[0006] Therefore, to solve the problem of large-scale release of PSA desorbed gas, it is necessary not only to improve the energy efficiency of the PSA system and reduce energy consumption, but also to find more environmentally friendly and safer emission treatment methods to protect the environment and personnel safety. Utility Model Content

[0007] The purpose of the utility model is to provide a conversion hydrogen production device that can recycle the released desorbed gas, which has a more reasonable design, convenient operation, low production and processing costs, and effectively controls and reduces the emission of desorbed gas, thereby achieving a more environmentally friendly and efficient hydrogen production process.

[0008] The utility model discloses a conversion hydrogen production device capable of recycling the released desorbed gas, comprising an adsorption tower 1, a primary pipeline 2 is fixedly connected to the bottom surface of the adsorption tower 1, a purge desorbed gas primary pipeline 3 is fixedly connected to the bottom end of the primary pipeline 2, the purge desorbed gas primary pipeline 3 is connected to a purge desorbed gas diode circuit 7, and a purge desorbed gas program-controlled valve 8 is installed on the purge desorbed gas diode circuit 7; a reverse release desorbed gas primary pipeline 4 is fixedly connected to the side wall of the primary pipeline 2, the reverse release desorbed gas primary pipeline 4 is connected to a reverse release desorbed gas diode circuit 5, and a reverse release desorbed gas program-controlled valve 6 is installed on the reverse release desorbed gas diode circuit 5.

[0009] A purge desorption gas primary pipeline 3 and a purge desorption gas diode circuit 7 are arranged on the primary pipeline 2, and a reverse release desorption gas primary pipeline 4 and a reverse release desorption gas diode circuit 5 are also arranged. The purge desorption gas primary pipeline 3 is used to transport the purge gas after desorption of the adsorbent, and the purge desorption gas diode circuit 7 is used to discharge the waste gas after desorption of the adsorbent. The reverse release desorption gas primary pipeline 4 and the reverse release desorption gas diode circuit 5 are used to discharge the tail gas with pressure drop during desorption of the adsorption tower. The purge desorption gas programmable valve 8 arranged on the purge desorption gas diode circuit 7 and the reverse release desorption gas programmable valve 6 arranged on the reverse release desorption gas diode circuit 5 can respectively control the gas volume and time discharged from the purge desorption gas primary pipeline 3 and the purge desorption gas diode circuit 7, so as to effectively control and reduce the emission of desorption gas while ensuring the purity of the product, thereby realizing a more environmentally friendly and efficient hydrogen production process.

[0010] A desorption gas main pipe 10 is connected to the pipe wall of the purge desorption gas primary pipeline 3, one end of the desorption gas main pipe 10 is fixedly connected to a Roots blower 12, one end of the Roots blower 12 is connected to a fuel gas pipeline network 13, and a desorption gas main pipe programmable valve 9 is installed on the desorption gas main pipe 10.

[0011] The function of the desorption gas main pipe 10 is to recover the desorption gas discharged from the purge desorption gas primary pipeline 3, and discharge it to the fuel gas pipeline network 13 after pressure regulation by the Roots blower 12. While reducing the cost of hydrogen production, it solves the problems of energy waste, environmental pollution, and affecting the safety of surrounding equipment and operators.

[0012] The height of the purge and desorption gas diode circuit 7 is higher than the height of the purge and desorption gas primary pipeline 3 .

[0013] The height of the reverse release and degassing diode circuit 5 is higher than the height of the reverse release and degassing primary pipeline 4 .

[0014] The height of the purge and desorption gas diode circuit 7 is set higher than the height of the purge and desorption gas primary pipeline 3; the height of the reverse release and desorption gas diode circuit 5 is set higher than the height of the reverse release and desorption gas primary pipeline 4, which can facilitate the gas in the purge and desorption gas primary pipeline 3 and the reverse release and desorption gas primary pipeline 4 to be vented to a high point.

[0015] The beneficial effects of the utility model are:

[0016] 1) A purge desorption gas primary pipeline 3 and a purge desorption gas diode circuit 7 are arranged on the primary pipeline 2, and a reverse release desorption gas primary pipeline 4 and a reverse release desorption gas diode circuit 5 are also arranged. The purge desorption gas primary pipeline 3 is used to transport the purge gas after the adsorbent is desorbed, and the purge desorption gas diode circuit 7 is used to discharge the waste gas after the adsorbent is desorbed. The reverse release desorption gas primary pipeline 4 and the reverse release desorption gas diode circuit 5 are used to discharge the tail gas with a pressure drop during desorption of the adsorption tower. The purge desorption gas program-controlled valve 8 arranged on the purge desorption gas diode circuit 7 and the reverse release desorption gas program-controlled valve 6 arranged on the reverse release desorption gas diode circuit 5 can respectively control the gas volume and time discharged from the purge desorption gas primary pipeline 3 and the purge desorption gas diode circuit 7, so as to effectively control and reduce the emission of desorption gas while ensuring the purity of the product, thereby realizing a more environmentally friendly and efficient hydrogen production process.

[0017] 2) The function of the desorption gas main pipe 10 is to recover the desorption gas discharged from the purge desorption gas primary pipeline 3, and discharge it to the fuel gas pipeline network 13 after pressure regulation by the Roots blower 12, thereby reducing the cost of hydrogen production and solving the problems of energy waste, environmental pollution, and affecting the safety of surrounding equipment and operators.

[0018] 3) The device has a reasonable structural design, convenient operation, and low processing and manufacturing cost. According to the direct relationship among the cycle time, conversion gas flow rate and product purity of the hydrogen production device, when the product purity is required to be certain, the change of conversion gas flow rate is most sensitive to the cycle time. When the conversion gas flow rate increases, the cycle time is required to be shortened. When the product purity decreases, the cycle time needs to be increased, and the desorption gas volume will also increase accordingly. The purge desorption gas programmable valve 8, the reverse release desorption gas programmable valve 6, and the desorption gas main pipe programmable valve 9 can be set to control the external emission of the desorption gas, thereby solving the problem of uncontrolled emission of desorption gas in the existing hydrogen production PSA adsorption process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] In the figure: adsorption tower 1; primary pipeline 2; purge desorption gas primary pipeline 3; reverse desorption gas primary pipeline 4; reverse desorption gas diode circuit 5; reverse desorption gas program-controlled valve 6; purge desorption gas diode circuit 7; purge desorption gas program-controlled valve 8; desorption gas main pipe program-controlled valve 9; desorption gas main pipe 10; high point venting 11; Roots blower 12; fuel gas pipeline network 13. DETAILED DESCRIPTION

[0021] Example 1.

[0022] The following will be combined with the attached Figure 1 The utility model is further described.

[0023] The utility model comprises an adsorption tower 1; a primary pipeline 2; a purge desorption gas primary pipeline 3; a reverse release desorption gas primary pipeline 4; a reverse release desorption gas diode circuit 5; a reverse release desorption gas program-controlled valve 6; a purge desorption gas diode circuit 7; a purge desorption gas program-controlled valve 8; and a high-point venting 11. The specific structure comprises an adsorption tower 1, a primary pipeline 2 is fixedly connected to the bottom surface of the adsorption tower 1, a purge desorption gas primary pipeline 3 is fixedly connected to the bottom end of the primary pipeline 2, the purge desorption gas primary pipeline 3 is connected to the purge desorption gas diode circuit 7, and a purge desorption gas program-controlled valve 8 is installed on the purge desorption gas diode circuit 7; a reverse release desorption gas primary pipeline 4 is fixedly connected to the side wall of the primary pipeline 2, the reverse release desorption gas primary pipeline 4 is connected to the reverse release desorption gas diode circuit 5, and a reverse release desorption gas program-controlled valve 6 is installed on the reverse release desorption gas diode circuit 5.

[0024] The height of the purge and desorption gas diode circuit 7 is higher than the height of the purge and desorption gas primary pipeline 3 .

[0025] The height of the reverse release and degassing diode circuit 5 is higher than the height of the reverse release and degassing primary pipeline 4 .

[0026] The diameter of the purge desorption gas primary pipeline 3 is DN150, and the diameter of the purge desorption gas diode circuit 7 is DN100; the diameter of the reverse desorption gas primary pipeline 4 is DN50, and the diameter of the reverse desorption gas diode circuit 5 is DN400.

[0027] The models of the reverse release desorption gas program-controlled valve 6, the purge desorption gas program-controlled valve 8, and the desorption gas main pipe program-controlled valve 9 are: CXJ641F.

[0028] Usage method: when the adsorption tower 1 is working, the function of the set purge desorption gas primary pipeline 3 is to transport the purge gas after the adsorbent is desorbed, the function of the purge desorption gas diode circuit 7 is to discharge the waste gas after the adsorbent is desorbed, and the set reverse release desorption gas primary pipeline 4 and reverse release desorption gas diode circuit 5 are to discharge the tail gas with pressure drop during desorption of the adsorption tower; the delay time of the reverse release desorption gas program-controlled valve 6 can be set to 70S, and the action time can be set to 80S; the delay time of the purge desorption gas program-controlled valve 8 can be set to 60S, and the action time is zero. The effect of such setting is that the program-controlled valve is in a closed state, the purge desorption gas is not released, and all of it is recovered.

[0029] Example 2.

[0030] The following will be combined with the attached Figure 1 The utility model is further described.

[0031] The utility model comprises an adsorption tower 1; a primary pipeline 2; a purge desorption gas primary pipeline 3; a reverse release desorption gas primary pipeline 4; a reverse release desorption gas diode circuit 5; a reverse release desorption gas program-controlled valve 6; a purge desorption gas diode circuit 7; a purge desorption gas program-controlled valve 8; a desorption gas main pipe program-controlled valve 9; a desorption gas main pipe 10; a high point venting 11; a Roots blower 12; and a fuel gas pipeline network 13. The specific structure comprises an adsorption tower 1, and the bottom surface of the adsorption tower 1 is fixedly connected with a primary Pipeline 2, the bottom end of the first-level pipeline 2 is fixedly connected with a first-level purge and desorption gas pipeline 3, the first-level purge and desorption gas pipeline 3 is connected to a purge and desorption gas diode circuit 7, and a purge and desorption gas program-controlled valve 8 is installed on the purge and desorption gas diode circuit 7; the side wall of the first-level pipeline 2 is fixedly connected with a first-level reverse release and desorption gas pipeline 4, the first-level reverse release and desorption gas pipeline 4 is connected to a reverse release and desorption gas diode circuit 5, and a reverse release and desorption gas program-controlled valve 6 is installed on the reverse release and desorption gas diode circuit 5.

[0032] A desorption gas main pipe 10 is connected to the pipe wall of the purge desorption gas primary pipeline 3, one end of the desorption gas main pipe 10 is fixedly connected to a Roots blower 12, one end of the Roots blower 12 is connected to a fuel gas pipeline network 13, and a desorption gas main pipe programmable valve 9 is installed on the desorption gas main pipe 10.

[0033] The height of the purge and desorption gas diode circuit 7 is higher than the height of the purge and desorption gas primary pipeline 3 .

[0034] The height of the reverse release and degassing diode circuit 5 is higher than the height of the reverse release and degassing primary pipeline 4 .

[0035] The diameter of the purge desorption gas primary pipeline 3 is DN150, and the diameter of the purge desorption gas diode circuit 7 is DN100; the diameter of the reverse desorption gas primary pipeline 4 is DN50, and the diameter of the reverse desorption gas diode circuit 5 is DN400.

[0036] Usage: When the adsorption tower 1 is working, the purge desorption gas primary pipeline 3 is used to transport the purge gas after desorption of the adsorbent, the purge desorption gas diode circuit 7 is used to discharge the waste gas after desorption of the adsorbent, and the reverse desorption gas primary pipeline 4 and the reverse desorption gas diode circuit 5 are used to discharge the tail gas with pressure drop during desorption of the adsorption tower; the delay time of the reverse desorption gas program-controlled valve 6 can be set to 70S, and the action time can be set to 80S; the delay time of the purge desorption gas program-controlled valve 8 can be set to 60S, and the action time is zero; the delay time of the desorption gas main pipe program-controlled valve 9 is set to 0S, and the action time is set to 85S. When the system is running, the desorption gas can be recycled.

Claims

1. A hydrogen production device capable of recycling the released desorbed gas, characterized in that: The adsorption tower (1) comprises an adsorption tower (1), wherein a primary pipeline (2) is fixedly connected to the bottom surface of the adsorption tower (1), a purge desorption gas primary pipeline (3) is fixedly connected to the bottom end of the primary pipeline (2), the purge desorption gas primary pipeline (3) is connected to a purge desorption gas diode circuit (7), and a purge desorption gas program-controlled valve (8) is installed on the purge desorption gas diode circuit (7); and a reverse release desorption gas primary pipeline (4) is fixedly connected to the side wall of the primary pipeline (2), the reverse release desorption gas primary pipeline (4) is connected to a reverse release desorption gas diode circuit (5), and a reverse release desorption gas program-controlled valve (6) is installed on the reverse release desorption gas diode circuit (5).

2. A hydrogen production device capable of recycling the released desorbed gas according to claim 1, characterized in that: A desorption gas main pipe (10) is connected to the pipe wall of the purge desorption gas primary pipeline (3), one end of the desorption gas main pipe (10) is fixedly connected to a Roots blower (12), one end of the Roots blower (12) is connected to a fuel gas pipeline network (13), and a desorption gas main pipe programmable valve (9) is installed on the desorption gas main pipe (10).

3. A hydrogen production device capable of recycling the released desorbed gas according to claim 1, characterized in that: The height of the purge and desorption gas diode circuit (7) is higher than the height of the purge and desorption gas primary pipe circuit (3).

4. A hydrogen production device capable of recycling the released desorbed gas according to claim 2, characterized in that: The height of the reverse release and degassing diode circuit (5) is higher than the height of the reverse release and degassing primary pipeline (4).

Images