Hydrogen recovery recycling system and hydrogen recovery recycling method

Abstract

The application relates to a hydrogen recovery and recycling system and a hydrogen recovery and recycling method, which comprise a hydrogen production component, a hydrogen utilization component, a recovery component and a control component. The hydrogen production component is used for producing hydrogen. The hydrogen utilization component is used for utilizing hydrogen. The hydrogen utilization component is connected with the hydrogen production component. The recovery component is used for recovering hydrogen. The recovery component is connected with the hydrogen production component. The control component is used for controlling the on-off between the hydrogen utilization component and the recovery component. The control component is connected with the hydrogen utilization component and the recovery component respectively. The hydrogen recovery and recycling system and the hydrogen recovery and recycling method provided by the application can reduce hydrogen energy waste, realize cyclic use of hydrogen energy, reduce waste gas emission, reduce production cost and improve product quality.

Description

Technical Field

[0001] This application relates to the field of hydrogen recovery and recycling, and in particular to a hydrogen recovery and recycling system and a hydrogen recovery and recycling method. Background Technology

[0002] Hydrogen is widely used in the cold rolling post-processing of the steel industry as a protective gas in the annealing furnace process and for improving the surface quality of strip steel. For steel enterprises with complete processes, the most common method is to produce hydrogen from industrial by-products. Hydrogen production methods that separate and purify hydrogen from coke oven gas rich in hydrogen through technologies such as pressure swing adsorption can obtain hydrogen with a purity of 99.9%-99.999%.

[0003] Hydrogen, as a clean, green, and efficient secondary energy source, is a very precious resource. It plays a crucial role in the post-processing of cold rolling, especially in the all-hydrogen annealing process of the annealing furnace. It not only acts as a protective gas to create an oxygen-free environment inside the furnace, but also allows hydrogen to rapidly convect and transfer heat within the inner hood through a high-speed circulating fan, achieving rapid and uniform heating and cooling of the annealed material. This results in products with uniform performance, good surface quality, and high production efficiency.

[0004] However, the hydrogen energy currently used in the annealing process is directly emitted, resulting in a waste of high-quality energy, which is a great pity. At the same time, the exhaust emissions also have a certain impact on the environment. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a hydrogen recovery and recycling system and a hydrogen recovery and recycling method.

[0006] In a first aspect, this application provides a hydrogen recovery and recycling system, comprising:

[0007] Hydrogen production components, used to produce hydrogen gas;

[0008] A hydrogen-using assembly is used to utilize hydrogen gas; the hydrogen-using assembly is connected to the hydrogen-generating assembly.

[0009] A recovery assembly for recovering hydrogen; the recovery assembly is connected to the hydrogen production assembly.

[0010] A control component is used to control the on / off connection between the hydrogen-using component and the recovery component; the control component is connected to both the hydrogen-using component and the recovery component.

[0011] Preferably, the hydrogen production assembly includes a pressure swing adsorption (PSA) device, which is used to generate hydrogen from coke oven gas.

[0012] Preferably, the hydrogen production assembly further includes a purification device connected to the pressure swing adsorption device, the purification device being used to purify the hydrogen produced by the pressure swing adsorption device.

[0013] Preferably, the purification device is a deoxygenation tower.

[0014] Preferably, the hydrogen-using assembly includes a hood-annealing full-hydrogen annealing process system, which is used to utilize the hydrogen generated by the hydrogen production assembly.

[0015] Preferably, the recovery component includes: a waste gas recovery process system, which is connected to the pressure swing adsorption device in the hydrogen production component.

[0016] Preferably, the waste gas recovery process system includes: a purification booster, which is connected to the pressure swing adsorption device.

[0017] Preferably, the control component includes: a solenoid valve for waste gas recovery pipeline, which is connected to both the hydrogen-using component and the recovery component.

[0018] Preferably, the control component further includes: an exhaust gas emission pipeline solenoid valve, which is connected to the hydrogen-using component.

[0019] Secondly, this application provides a method for hydrogen recovery and recycling, implemented based on any of the hydrogen recovery and recycling systems described above, the method comprising the following steps:

[0020] Operate the hydrogen production unit to generate hydrogen;

[0021] The operating hydrogen assembly utilizes the hydrogen produced by the hydrogen generation assembly.

[0022] An operation control component is used to control the connection between the hydrogen-using component and the recovery component;

[0023] The operation of the recovery component recovers the hydrogen delivered by the hydrogen assembly;

[0024] The operation control component is used to control the disconnection between the hydrogen-using component and the recovery component;

[0025] The control component is operated to discharge the waste gas generated by the hydrogen assembly.

[0026] The technical solutions provided in this application have the following advantages compared with the prior art:

[0027] The hydrogen recovery and recycling system and method provided in this application play a very important role and have great significance in reducing hydrogen energy waste, realizing the recycling of hydrogen energy, reducing waste gas emissions, reducing production costs, and improving product quality. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of a hydrogen recovery and recycling system provided in an embodiment of this application. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Figure 1 This is a schematic diagram of a hydrogen recovery and recycling system provided in an embodiment of this application.

[0033] This application provides a hydrogen recovery and recycling system, comprising:

[0034] Hydrogen production assembly 10, used to produce hydrogen gas;

[0035] Hydrogen-using component 20 is used to utilize hydrogen gas; the hydrogen-using component 20 is connected to the hydrogen-generating component 10.

[0036] A recovery component 30 is used to recover hydrogen; the recovery component 30 is connected to the hydrogen production component 10.

[0037] A control component 40 is used to control the on / off connection between the hydrogen-using component 20 and the recovery component 30; the control component 40 is connected to the hydrogen-using component 20 and the recovery component 30 respectively.

[0038] Specifically, the hydrogen production unit 10 is operated to generate hydrogen gas, which enters the hydrogen consumption unit 20 through a pipeline. At this time, the hydrogen consumption unit 20 utilizes the hydrogen generated by the hydrogen production unit 10. Then, the control unit 40 is operated to control the connection between the hydrogen consumption unit 20 and the recovery unit 30. The waste gas containing hydrogen enters the recovery unit 30 through a pipeline. At this time, the recovery unit 30 recovers the hydrogen transported by the hydrogen consumption unit 20. After recovering the hydrogen, the recovery unit 30 transports it back to the hydrogen production unit 10 for recycling. When the emitted waste gas does not meet the recovery conditions, the control unit 40 is operated to control the disconnection between the hydrogen consumption unit 20 and the recovery unit 30, and the control unit 40 discharges the waste gas generated by the hydrogen consumption unit 20.

[0039] In this embodiment of the application, the hydrogen production assembly 10 includes a pressure swing adsorption device, which is used to generate hydrogen from coke oven gas.

[0040] Specifically, after the industrial by-product coke oven gas is transported to the pressure swing adsorption (PSA) unit, the PSA unit processes the product to produce hydrogen.

[0041] In this embodiment, the hydrogen production assembly 10 further includes a purification device connected to the pressure swing adsorption device, the purification device being used to purify the hydrogen produced by the pressure swing adsorption device.

[0042] Specifically, the purification unit purifies the hydrogen in the pressure swing adsorption unit to achieve a high purity of 99.999%.

[0043] In this embodiment of the application, the purification device is a deoxygenation tower.

[0044] Specifically, the deoxygenation tower can purify hydrogen to obtain high-purity hydrogen.

[0045] In this embodiment, the hydrogen-using component 20 includes a hood-annealed full-hydrogen annealing process system, which is used to utilize the hydrogen generated by the hydrogen production component 10.

[0046] Specifically, the hooded all-hydrogen annealing process system utilizes high-purity hydrogen for various processes.

[0047] In this embodiment, the recovery component 30 includes a waste gas recovery process system, which is connected to the pressure swing adsorption device in the hydrogen production component 10.

[0048] Specifically, the waste gas recovery process system is used to recover and utilize the hydrogen that was not used during the hood annealing process, thereby improving the utilization rate of hydrogen.

[0049] In this embodiment of the application, the waste gas recovery process system includes: a purification booster, which is connected to the pressure swing adsorption device.

[0050] Specifically, the purification booster can purify hydrogen-containing waste gas on the one hand, and boost its pressure on the other.

[0051] In this embodiment of the application, the control component 40 includes: a waste gas recovery pipeline solenoid valve 41, which is connected to the hydrogen consumption component 20 and the recovery component 30 respectively.

[0052] Specifically, when the solenoid valve 41 of the waste gas recovery pipeline is opened, the pipeline between the hydrogen-using component 20 and the recovery component 30 is connected, and hydrogen enters the recovery component 30 through the hydrogen-using component 20.

[0053] In this embodiment, the control component 40 further includes an exhaust gas emission pipeline solenoid valve 42, which is connected to the hydrogen-using component 20.

[0054] Specifically, when the solenoid valve 41 of the exhaust gas recovery pipeline is closed and the solenoid valve 42 of the exhaust gas discharge pipeline is open, the pipeline between the hydrogen-using component 20 and the recovery component 30 is closed, and hydrogen is discharged into the atmosphere through the hydrogen-using component 20.

[0055] When the hydrogen recovery and recycling system is operating, during the full hydrogen annealing process in the annealing furnace, high-concentration hydrogen-containing waste gas is discharged into the atmosphere through the waste gas emission pipe. At this time, the solenoid valve 42 of the waste gas emission pipe is closed; the solenoid valve 41 of the waste gas recovery pipe is open, and the high-concentration hydrogen-containing waste gas enters the waste gas recovery process system. After entering the waste gas recovery process system, the waste gas undergoes two-stage filtration and purification to remove particulate matter and oily impurities. After being pressurized by a Roots blower, the waste gas enters a pressure swing adsorption unit, where it is further purified to produce 99.999% hydrogen, thereby achieving hydrogen energy recycling.

[0056] The hydrogen recovery and recycling system achieves an orderly connection between the hydrogen production process in the annealing furnace and the hydrogen production process from coke oven gas, realizing a complete process from hydrogen production, hydrogen use, and hydrogen recovery and recycling. Specifically, the hydrogen recovery and recycling system automatically collects and recovers high-concentration waste hydrogen according to the annealing cycle of a single annealing furnace. After filtration to remove impurities and purification, the hydrogen is pressurized and distributed to the hydrogen production unit 10, where it is then used to produce 99.999% high-purity hydrogen using mature hydrogen production technology, thus achieving hydrogen recovery and recycling for hydrogen production.

[0057] In this application embodiment, a method for hydrogen recovery and recycling is provided, implemented based on any of the hydrogen recovery and recycling systems described above. The method includes the following steps:

[0058] The hydrogen production assembly 10 is operated to produce hydrogen gas.

[0059] The hydrogen assembly 20 operates using the hydrogen produced by the hydrogen generation assembly 10;

[0060] The operation control component 40 controls the connection between the hydrogen consumption component 20 and the recovery component 30;

[0061] The operation recovery component 30 recovers the hydrogen delivered by the hydrogen assembly 20;

[0062] The operation control component 40 controls the disconnection between the hydrogen-using component 20 and the recovery component 30;

[0063] The control component 40 is operated to discharge the waste gas generated by the hydrogen-using component 20.

[0064] The hydrogen recovery and recycling system and method provided in this application play a very important role and have great significance in reducing hydrogen energy waste, realizing the recycling of hydrogen energy, reducing waste gas emissions, reducing production costs, and improving product quality.

[0065] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0066] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A hydrogen recovery and recycling system, characterized in that, include: Hydrogen production assembly, used to produce hydrogen gas with a purity of 99.999%; A hydrogen-using assembly is used to utilize hydrogen gas; the hydrogen-using assembly is connected to the hydrogen-generating assembly. A recovery assembly for recovering hydrogen; the recovery assembly is connected to the hydrogen production assembly. A control component for controlling the on / off connection between the hydrogen-using component and the recovery component; The control component is connected to the hydrogen-using component and the recovery component, respectively. The hydrogen production assembly includes a pressure swing adsorption device, which is used to generate hydrogen from coke oven gas. The hydrogen production assembly further includes: a purification device, which is connected to the pressure swing adsorption device, and is used to purify the hydrogen produced by the pressure swing adsorption device; The recovery component includes: a waste gas recovery process system, which is connected to the pressure swing adsorption device in the hydrogen production component; The waste gas recovery process system includes: a purification booster, which is connected to the pressure swing adsorption device; The control components include: a solenoid valve for waste gas recovery pipeline and a solenoid valve for waste gas emission pipeline. The solenoid valve for waste gas recovery pipeline is connected to the hydrogen-using component and the recovery component, respectively, and the solenoid valve for waste gas emission pipeline is connected to the hydrogen-using component.

2. The hydrogen recovery and recycling system according to claim 1, characterized in that, The purification device is a deoxygenation tower.

3. The hydrogen recovery and recycling system according to claim 1, characterized in that, The hydrogen-using assembly includes a hood-annealed full-hydrogen annealing process system, which is used to utilize the hydrogen generated by the hydrogen production assembly.

4. A method for recovering and recycling hydrogen, characterized in that, Based on the hydrogen recovery and recycling system as described in any one of claims 1-3, the method includes the following steps: Operate the hydrogen production unit to generate hydrogen; The operating hydrogen assembly utilizes the hydrogen produced by the hydrogen generation assembly. An operation control component is used to control the connection between the hydrogen-using component and the recovery component; The operation of the recovery component recovers the hydrogen delivered by the hydrogen assembly; The operation control component is used to control the disconnection between the hydrogen-using component and the recovery component; The control component is operated to discharge the waste gas generated by the hydrogen assembly.

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