Steel smelting system with catalytic combustion function and collaborative injection method

Abstract

The invention discloses a steel smelting system with a catalytic combustion function and a collaborative injection method, and belongs to the technical field of vanadium-containing molten iron steelmaking. The steel smelting system with the catalytic combustion function mainly comprises a steel smelting module, a gas distribution and preparation module, a pure hydrogen storage container and a catalytic combustion unit. Wherein a gas distribution unit is arranged in the gas distribution and preparation module, the gas inlet end of the gas distribution unit is directly or indirectly connected with the gas outlet end of the steel smelting module, and the steel smelting module and a hydrogen-rich gas preparation unit are arranged at the gas outlet end of the gas distribution unit; a steel smelting module and a pure hydrogen storage container are arranged at the gas outlet end of the hydrogen-rich gas preparation unit; and a catalytic combustion unit is arranged at the gas outlet end of the gas distribution unit. The collaborative injection method is used for injection operation of the steel smelting system. Compared with the prior art, the pure hydrogen supply amount is reduced to a certain degree, and therefore the smelting cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vanadium-containing molten iron steelmaking, and in particular to a steel smelting system with a catalytic combustion function and a collaborative injection method. BACKGROUND

[0002] In the field of resource utilization of vanadium-containing molten iron, the vanadium extraction-decarburization dual converter process is generally used to realize the collaborative treatment of vanadium resource recovery and steel smelting. This process uses a special vanadium extraction converter to oxidize and blow the vanadium-containing molten iron, selectively oxidizing the vanadium elements in the molten iron to form vanadium slag, which can be further extracted to prepare vanadium compound products after separation; and the semi-steel liquid after decarburization is transferred to a decarburization converter for deep dephosphorization and decarburization, and finally the required steel is obtained. In the steelmaking process, hydrogen-rich gas is widely used as a blowing medium for the decarburization converter process; by replacing traditional carbon-based reducing agents with hydrogen gas to participate in metallurgical reactions, this process not only achieves efficient decarburization but also significantly reduces process carbon emissions, providing key technical support for the green transformation of the steel industry.

[0003] A prior art (publication number: CN117431352A) proposed by Changli County Xingguo Precision Parts Co., Ltd. and Shanghai University discloses a steel smelting system based on hydrogen-rich reducing gas injection, characterized in that it includes a blast furnace and a hydrogen-rich reducing gas preparation furnace; hydrogen-rich reducing gas and pure hydrogen from the hydrogen-rich reducing gas preparation furnace are injected into the blast furnace; the generated blast furnace top gas is recycled into the hydrogen-rich reducing gas preparation furnace for decarburization; the material column in the hydrogen-rich reducing gas preparation furnace includes coke butter, biomass particles and waste plastic particles, and dry coal powder and pure oxygen are also injected into the hydrogen-rich reducing gas preparation furnace to prepare hydrogen-rich reducing gas.

[0004] In the above-mentioned prior art, if the blast furnace produces too much gas, it will usually cause excessive hydrogen-rich reducing gas to be produced. In order to maintain the preset ratio of hydrogen-rich reducing gas to pure hydrogen, the supply of pure hydrogen needs to be increased simultaneously; however, the preparation cost of pure hydrogen is relatively high, which will increase the smelting cost of the above-mentioned prior art to some extent. SUMMARY

[0005] To solve the defects of the prior art, the steel smelting system with catalytic combustion function provided by the present application mainly comprises a steel smelting module, a gas distribution and preparation module, a pure hydrogen storage container and a catalytic combustion unit. In use, the gas distribution unit in the gas distribution and preparation module can deliver the corresponding amount of coal gas to the hydrogen-rich gas preparation unit according to the amount of hydrogen-rich reducing gas required by the current steel smelting module; at the same time, the gas distribution and preparation module can transfer the remaining coal gas that is not required to be delivered back to the steel smelting module for use as blowing gas to the catalytic combustion unit for removal treatment. Compared with the prior art, the present application reduces the supply amount of pure hydrogen to a certain extent, thereby reducing the smelting cost.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The steel smelting system with catalytic combustion function comprises:

[0008] The gas distribution and preparation module is provided with the steel smelting module at the gas inlet end and comprises:

[0009] The gas distribution unit is directly or indirectly connected with the gas outlet end of the steel smelting module at the gas inlet end, and the gas outlet end of the gas distribution unit is provided with the steel smelting module;

[0010] The hydrogen-rich gas preparation unit is connected with the gas outlet end of the gas distribution unit at the gas inlet end, and the gas outlet end of the hydrogen-rich gas preparation unit is provided with the steel smelting module and the pure hydrogen storage container, i.e. the gas inlet end of the steel smelting module is provided with the hydrogen-rich gas preparation unit and the pure hydrogen storage container;

[0011] Among them,

[0012] The gas outlet end of the gas distribution unit is directly or indirectly provided with the catalytic combustion unit, and the catalytic combustion unit is used for treating the remaining coal gas that is not required to be delivered back to the steel smelting module for use as blowing gas by the gas distribution and preparation module.

[0013] Further, the steel smelting module comprises:

[0014] The vanadium extraction converter unit is directly or indirectly connected with the gas inlet end of the gas distribution unit at the gas outlet end, and the gas inlet end of the vanadium extraction converter unit is connected with the gas outlet end of the gas distribution unit;

[0015] The decarburization converter unit is directly or indirectly connected with the gas inlet end of the gas distribution unit at the gas outlet end, and the gas inlet end of the decarburization converter unit is provided with the hydrogen-rich gas preparation unit and the pure hydrogen storage container.

[0016] Further, the steel smelting system with catalytic combustion function further comprises:

[0017] A coal gas purification module;

[0018] The coal gas purification module is provided with the vanadium extraction converter unit and the decarburization converter unit at the gas inlet end, and is connected with the gas inlet end of the gas distribution unit at the gas outlet end, and is used for removing useless components in the coal gas delivered by the vanadium extraction converter unit and the decarburization converter unit.

[0019] Further, the coal gas purification module comprises:

[0020] a vanadium extraction coal gas purification unit, which is connected with the gas outlet end of the vanadium extraction converter unit at the gas inlet end, and is connected with the gas inlet end of the gas distribution unit at the gas outlet end;

[0021] a decarburization coal gas purification unit, which is connected with the gas outlet end of the decarburization converter unit at the gas inlet end, and is connected with the gas inlet end of the gas distribution unit at the gas outlet end.

[0022] Further, the steel smelting system with the catalytic combustion function further comprises:

[0023] a waste heat collection module, which is connected with the gas outlet end of the catalytic combustion unit at the gas inlet end.

[0024] Further, the waste heat collection module comprises:

[0025] a waste heat power generation unit;

[0026] The waste heat power generation unit is connected with the gas outlet end of the catalytic combustion unit at the gas inlet end, and is used for converting the waste heat generated by the catalytic combustion unit into electric energy.

[0027] Further, the waste heat collection module further comprises:

[0028] a carbon dioxide collection unit;

[0029] The carbon dioxide collection unit is connected with the gas outlet end of the catalytic combustion unit at the gas inlet end, and is used for collecting the carbon dioxide that cannot be treated in the catalytic combustion unit.

[0030] Further, the steel smelting system with the catalytic combustion function further comprises:

[0031] a reforming and separating module;

[0032] The reforming and separating module is connected with the gas outlet end of the gas distribution unit at the gas inlet end, and is provided with the pure hydrogen storage container and the catalytic combustion unit at the gas outlet end.

[0033] Further, the reforming separation module comprises:

[0034] a reforming reaction unit, a gas inlet end of which is connected with a gas outlet end of the gas distribution unit;

[0035] a gas separation unit, a gas inlet end of which is connected with a gas outlet end of the reforming reaction unit, and a gas outlet end of the gas separation unit is provided with the pure hydrogen storage container and the catalytic combustion unit.

[0036] Based on the same inventive concept, the application also discloses a collaborative blowing method

[0037] The collaborative blowing method is used for the steel smelting system with the catalytic combustion function and comprises the following steps.

[0038] S101, the coal gas generated by the vanadium extraction converter unit and the decarburization converter unit is transported to the gas distribution unit;

[0039] S103, the gas distribution unit divides the received coal gas into a first branch pipe and a second branch pipe, the coal gas in the first branch pipe is transported to the vanadium extraction converter unit as blowing gas, and the coal gas in the second branch pipe is transported to the hydrogen-rich gas preparation unit;

[0040] S105, the hydrogen-rich gas preparation unit prepares the coal gas in the second branch pipe into hydrogen-rich reducing gas;

[0041] S107, the prepared hydrogen-rich reducing gas is mixed with the pure hydrogen gas in the pure hydrogen storage container and is transported to the decarburization converter unit as blowing gas.

[0042] The application has the following beneficial effects:

[0043] 1. The steel smelting system with the catalytic combustion function comprises a gas distribution and preparation module, and a gas distribution unit in the gas distribution and preparation module can transport a corresponding amount of coal gas to the hydrogen-rich gas preparation unit according to the required amount of hydrogen-rich reducing gas blown by the steel smelting module, so that the steel smelting module can avoid transporting too much coal gas to the hydrogen-rich preparation unit through the gas distribution unit, the hydrogen-rich preparation unit can avoid generating excessive hydrogen-rich reducing gas, and the supply amount of pure hydrogen is reduced to a certain extent.

[0044] 2. The steel smelting system with the catalytic combustion function comprises a catalytic combustion unit, which can process the remaining coal gas that is not required to be transported back to the steel smelting module as blowing gas by the gas distribution and preparation module, so that the coal gas can be avoided from being accumulated in the gas distribution and preparation module, and the stability of the operation of the application is enhanced.

[0045] 3、The synergistic injection method provided by the application can reasonably allocate the coal gas generated by the vanadium extraction converter unit and the decarburization converter unit, realize the optimized utilization of resources, and can further improve the efficiency and quality of steel smelting, and to a certain extent, help reduce energy consumption and carbon emissions, and therefore has certain economic and environmental benefits. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 is a general principle diagram of the application;

[0047] Figure 2 is the application Figure 1 is a principle diagram in a specific application scenario;

[0048] Figure 3 is the application Figure 1 is a principle diagram in another specific application scenario;

[0049] Figure 4 is a principle diagram of the reforming separation module of the application;

[0050] Figure 5 is a flowchart of the synergistic injection method of the application.

[0051] REFERENCE SIGNS:

[0052] 1, coal gas purification module; 11, vanadium extraction coal gas purification unit; 12, decarburization coal gas purification unit;

[0053] 2, gas distribution and preparation module; 21, gas distribution unit; 22, hydrogen-rich gas preparation unit;

[0054] 3, catalytic combustion unit;

[0055] 4, steel smelting module; 41, vanadium extraction converter unit; 42, decarburization converter unit;

[0056] 5, pure hydrogen storage container;

[0057] 6, waste heat collection module; 61, waste heat power generation unit; 62, carbon dioxide collection unit;

[0058] 7, reforming separation module; 71, reforming reaction unit; 72, gas separation unit. DETAILED DESCRIPTION

[0059] To make the purpose, technical scheme and advantages of the application clearer and more apparent, the application will be further described in detail below in conjunction with the embodiments and drawings. Herein, the illustrative embodiments of the application and their descriptions are used to explain the application, but not as a limitation of the application.

[0060] As shown in the accompanying drawings, the embodiment discloses a steel smelting system with catalytic combustion function, which is used for reducing the supply of pure hydrogen, and mainly comprises a steel smelting module 4, a gas distribution and preparation module 2, a pure hydrogen storage container 5 and a catalytic combustion unit 3. Figures 1-4 The lines between the modules or units in the drawings represent pipes, i.e. the gas generated by each module or unit is transported through the corresponding pipe; generally, the above-mentioned pipes are made of high-temperature-resistant materials. In use, the controller (not shown in the drawings) is started, and the embodiment starts to work. The gas outlet of the steel smelting module 4 continuously generates coal gas, which mainly includes carbon dioxide, carbon monoxide, nitrogen and hydrogen. Then, the coal gas can be transported to the gas distribution and preparation module 2 through the pipe of the gas outlet of the steel smelting module 4. Then, the gas distribution unit 21 in the gas distribution and preparation module 2 can know the amount of hydrogen-rich reducing gas required by the steel smelting module 4 according to the data transmitted by the controller, and then deliver the corresponding amount of coal gas to the hydrogen-rich gas preparation unit 22. Then, the hydrogen-rich gas preparation unit 22 can prepare the corresponding amount of hydrogen-rich reducing gas according to the received coal gas. Then, the controller guides the appropriate amount of pure hydrogen in the pure hydrogen storage container 5 to the pipe between the steel smelting module 4 and the hydrogen-rich gas preparation unit 22, so that the pure hydrogen and the hydrogen-rich reducing gas are mixed in a certain proportion to form the blowing gas and are delivered to the steel smelting module 4. In addition, the controller instructs the gas distribution unit 21 to transfer the remaining coal gas, which is not required to be delivered back to the steel smelting module 4 as blowing gas, to the catalytic combustion unit 3. Then, the controller instructs the catalytic combustion unit 3 to start processing the remaining coal gas. Such a design can avoid the steel smelting module 4 delivering too much coal gas to the hydrogen-rich preparation unit through the gas distribution unit 21, which leads to the hydrogen-rich gas preparation unit 22 producing excessive hydrogen-rich reducing gas, thereby reducing the supply of pure hydrogen to a certain extent. On the other hand, it can also avoid the accumulation of coal gas in the gas distribution and preparation module 2, thereby enhancing the stability of the operation of the embodiment. Figures 1-4

[0061] ​In the existing steel smelting process, the steel smelting module 4 will deliver a certain amount of coal gas to the hydrogen-rich gas preparation unit 22; then, the hydrogen-rich gas preparation unit 22 can prepare the corresponding hydrogen-rich reducing gas according to the amount of received coal gas; in order to maintain the preset ratio between the hydrogen-rich reducing gas and the pure hydrogen, the pure hydrogen storage container 5 needs to supply a corresponding amount of pure hydrogen; however, the chemical reaction rate inside the steel smelting module 4 is not proportional to the amount of coal gas generated, that is, the steel smelting module 4 may generate excess coal gas; when these excess coal gas is delivered to the hydrogen-rich gas preparation unit 22, the hydrogen-rich gas preparation unit 22 will usually generate excess hydrogen-rich reducing gas, thereby causing the supply amount of pure hydrogen to increase accordingly. Since the preparation cost of pure hydrogen is relatively high, this will increase the smelting cost to some extent.

[0062] However, by setting the gas distribution unit 21, the present embodiment can deliver a corresponding amount of coal gas to the hydrogen-rich gas preparation unit 22 according to the amount of hydrogen-rich reducing gas required by the current steel smelting module 4 for injection; in addition, the gas distribution unit 21 can transfer the remaining coal gas that is not required to be delivered back to the steel smelting module 4 for use as injection gas to the catalytic combustion unit 3 for removal treatment of these remaining coal gas, which to some extent reduces the supply amount of pure hydrogen, thereby reducing the smelting cost.

[0063] The specific architecture of the steel smelting system with catalytic combustion function is as follows: it includes a gas distribution and preparation module 2, which is provided with a gas distribution unit 21, the gas inlet end of the gas distribution unit 21 is directly or indirectly connected with the gas outlet end of the steel smelting module 4, the gas outlet end of the gas distribution unit 21 is provided with the steel smelting module 4 and the hydrogen-rich gas preparation unit 22, the gas outlet end of the hydrogen-rich gas preparation unit 22 is provided with the steel smelting module 4 and the pure hydrogen storage container 5, that is, the gas inlet end of the steel smelting module 4 is provided with the hydrogen-rich gas preparation unit 22 and the pure hydrogen storage container 5; and the gas outlet end of the gas distribution unit 21 is directly or indirectly provided with the catalytic combustion unit 3. Compared with the prior art, the present application reduces the supply amount of pure hydrogen to some extent, thereby reducing the smelting cost.

[0064] In a specific application scenario, as shown in the accompanying drawings Figure 2 or the accompanying drawings Figure 3 As shown, the steel smelting module 4 includes a vanadium extraction converter unit 41 and a decarburization converter unit 42; wherein the gas outlet end of the vanadium extraction converter unit 41 is directly or indirectly connected with the gas inlet end of the gas distribution unit 21, and the gas inlet end of the vanadium extraction converter unit 41 is connected with the gas outlet end of the gas distribution unit 21; the gas outlet end of the decarburization converter unit 42 is directly or indirectly connected with the gas inlet end of the gas distribution unit 21, and the gas inlet end of the decarburization converter unit 42 is provided with the hydrogen-rich gas preparation unit 22 and the pure hydrogen storage container 5.

[0065] In actual use, the gas outlet end of the vanadium extraction converter unit 41 can continuously discharge coal gas, which is transported to the gas distribution unit 21 through the pipeline; at the same time, the gas outlet end of the decarburization converter unit 42 can continuously discharge coal gas, which is transported to the gas distribution unit 21 through the pipeline; at this time, the gas distribution unit 21 can divide the received coal gas into two appropriate parts according to the current working conditions of the vanadium extraction converter unit 41 and the decarburization converter unit 42, one part is transported to the vanadium extraction converter unit 41 through the first branch pipe (not shown in the figure) of the gas outlet end of the gas distribution unit 21, because in the vanadium extraction converter unit 41, the gas with a high proportion of carbon dioxide is needed as the injection gas, and such a design can promote the efficiency of vanadium extraction; the other part is transported to the hydrogen-rich gas preparation unit 22 through the second branch pipe (not shown in the figure) of the gas outlet end of the gas distribution unit 21, in preparation for the preparation of a corresponding amount of hydrogen-rich reducing gas; if there is still remaining coal gas in the gas distribution unit 21, the controller can instruct the gas distribution unit 21 to transport the remaining coal gas to the catalytic combustion unit 3, which can burn and diffuse the remaining coal gas; such a design reduces the supply of pure hydrogen to a certain extent, while also reducing carbon emissions and protecting the ecological environment; generally, the vanadium extraction converter unit 41 described in this paragraph includes a vanadium extraction converter and an iron ore powder injection tank, the decarburization converter unit 42 described in this paragraph includes a decarburization converter and a lime powder injection tank, and the vanadium extraction converter unit 41 and the decarburization converter unit 42 are both connected with an external oxygen source to ensure the normal work of the vanadium extraction converter unit 41 and the decarburization converter unit 42.

[0066] In a specific application scenario, as shown in the accompanying Figure 2 or the accompanying Figure 3 As shown, the steel smelting module 4 and the gas distribution unit 21 are provided with a coal gas purification module 1; wherein the gas inlet end of the coal gas purification module 1 is provided with a vanadium extraction converter unit 41 and a decarburization converter unit 42, and the gas outlet end of the coal gas purification module 1 is connected with the gas inlet end of the gas distribution unit 21; generally, the coal gas purification module 1 is electrically connected with the aforementioned controller, which can remove the useless components in the coal gas transported by the vanadium extraction converter unit 41 and the decarburization converter unit 42, i.e. the gases other than carbon dioxide, carbon monoxide, nitrogen and hydrogen, thereby improving the product quality obtained by the vanadium extraction converter unit 41 and the decarburization converter unit 42.

[0067] Furthermore, the gas purification module 1 mainly includes a vanadium extraction gas purification unit 11 and a decarbonization gas purification unit 12. Specifically, the inlet of the vanadium extraction gas purification unit 11 is connected to the outlet of the vanadium extraction converter unit 41, and the outlet of the vanadium extraction gas purification unit 11 is connected to the inlet of the gas distribution unit 21. The inlet of the decarbonization gas purification unit 12 is connected to the outlet of the decarbonization converter unit 42, and the outlet of the decarbonization gas purification unit 12 is connected to the inlet of the gas distribution unit 21. Normally, both the vanadium extraction gas purification unit 11 and the decarbonization gas purification unit 12 are electrically connected to the aforementioned controller. In a specific application scenario, two pipes are provided between the gas distribution unit 21 and the gas purification module 1, that is, two pipes are provided at the inlet of the gas distribution unit 21, one pipe is connected to the decarbonization gas purification unit 12, and the other pipe is connected to the vanadium extraction gas purification unit 11.

[0068] In actual use, the coal gas generated by the vanadium extraction converter unit 41 is transported through pipelines to the vanadium extraction gas purification unit 11. The vanadium extraction gas purification unit 11 then purifies the received coal gas. Next, the vanadium extraction gas purification unit 11 transports the purified gas to the gas distribution unit 21. The corresponding process of the decarbonization gas purification unit 12 is similar to that of the vanadium extraction gas purification unit 11, and the specific details are not elaborated here. Furthermore, both the vanadium extraction gas purification unit 11 and the decarbonization gas purification unit 12 are connected to an external oxygen source to ensure their normal operation. The specific details of the purification operation can be broadly referenced in an existing patent, publication number CN109234490B.

[0069] In a specific application scenario, as shown in the appendix Figure 1 As shown, the gas outlet of the catalytic combustion unit 3 is equipped with a waste heat collection module 6. This design can utilize the energy or matter generated by the catalytic combustion unit 3, thereby realizing the reuse of resources in this embodiment.

[0070] Furthermore, as shown in the appendix Figure 1 and appendix Figure 2 As shown, the waste heat collection module 6 is equipped with a waste heat power generation unit 61; specifically, the air inlet of the waste heat power generation unit 61 is connected to the air outlet of the catalytic combustion unit 3; under normal circumstances, the waste heat power generation unit 61 is electrically connected to the aforementioned controller.

[0071] The catalytic combustion unit 3 will generate water vapor in the process of treating the received coal gas; then, the water vapor can move along the pipeline of the gas outlet end of the catalytic combustion unit 3 to the waste heat power generation unit 61; then, the waste heat power generation unit 61 will receive the heat generated by the water vapor; then, the waste heat power generation unit 61 can convert the heat into electric energy and transmit to other electrical equipment, which improves the energy utilization rate of the embodiment.

[0072] Further, the waste heat collection module 6 is also provided with a carbon dioxide collection unit 62; specifically, the gas inlet end of the carbon dioxide collection unit 62 is connected with the gas outlet end of the catalytic combustion unit 3; usually, the carbon dioxide collection unit 62 is electrically connected with the aforementioned controller.

[0073] The catalytic combustion unit 3 will generate water vapor in the process of treating the received coal gas; then, the water vapor can move along the pipeline of the gas outlet end of the catalytic combustion unit 3 to the waste heat power generation unit 61; then, the waste heat power generation unit 61 will receive the heat generated by the water vapor; then, the waste heat power generation unit 61 can convert the heat into electric energy and transmit to other electrical equipment, which improves the energy utilization rate of the embodiment.

[0074] The above-mentioned gas distribution unit 21 can also be composed of a plurality of gas flow sensors (not shown in the figure) and a plurality of gas valves (not shown in the figure); specifically, a three-way pipeline (not shown in the figure) is arranged between the gas outlet end of the steel smelting module 4 and the pipeline of the hydrogen-rich gas preparation unit 22, the gas inlet end of the three-way pipeline is connected with the gas outlet end of the steel smelting module 4, and the gas outlet end of the three-way pipeline is provided with the steel smelting module 4, the hydrogen-rich gas preparation unit 22 and the catalytic combustion unit 3, that is, the first passage of the three-way pipeline is communicated with the steel smelting module 4, the second passage is communicated with the hydrogen-rich gas preparation unit 22, and the third passage is communicated with the catalytic combustion unit 3; and the gas inlet end of the first passage, the second passage and the third passage is respectively provided with a group of gas flow sensors and gas valves, that is, one gas flow sensor and one gas valve; usually, each group of gas flow sensors and gas valves are electrically connected with the aforementioned controller.

[0075] In actual use, the controller first sends a closing instruction to the gas valve on the third passage; then, the controller sends an opening instruction to the gas valves on the first passage and the second passage, so that the gas at the gas outlet of the steel smelting module 4 can be transmitted through the first passage and the second passage; in this process, the gas flow sensors on the first passage and the second passage can send the current gas data flowing through the corresponding first passage and second passage to the controller in real time; if the amount of hydrogen-rich gas prepared by the hydrogen-rich gas preparation unit 22 currently received meets the corresponding blowing amount, the controller sends a closing instruction to the gas valves on the first passage and the second passage; at the same time, the controller sends an opening instruction to the gas valve on the third passage, and the remaining gas will be delivered to the catalytic combustion unit 3; then, the catalytic combustion unit 3 starts the corresponding combustion and dispersion process, which can also achieve the corresponding function of the gas distribution unit 21 described above, and to a certain extent, simplifies the structure of the embodiment and reduces the cost.

[0076] The present application also considers a case, as shown in the accompanying drawings Figure 3 The specific scheme is as follows: a reforming and separating module 7 is arranged between the gas distribution unit 21 and the catalytic combustion unit 3; the gas inlet end of the reforming and separating module 7 is connected with the gas outlet end of the gas distribution unit 21, and the gas outlet end of the reforming and separating module 7 is provided with the pure hydrogen storage container 5 and the catalytic combustion unit 3. In a specific application scenario, as shown in the accompanying drawings Figure 3 and the accompanying drawings Figure 4 The reforming and separating module 7 mainly includes a reforming reaction unit 71 and a gas separation unit 72; the gas inlet end of the reforming reaction unit 71 is connected with the gas outlet end of the gas distribution unit 21; the gas outlet end of the reforming reaction unit 71 is provided with the gas separation unit 72, and the gas outlet end of the gas separation unit 72 is provided with the pure hydrogen storage container 5 and the catalytic combustion unit 3; usually, the reforming reaction unit 71 and the gas separation unit 72 are electrically connected with the aforementioned controller.

[0077] In actual use, the coal gas in the gas distribution unit 21 will generally undergo a chemical reaction to produce a certain amount of methane. The coal gas contains carbon monoxide, carbon dioxide and hydrogen. Under certain conditions, the carbon atoms and hydrogen atoms in the coal gas can combine to form methane. When the gas distribution unit 21 cannot deliver coal gas to the hydrogen-rich gas preparation unit 22 and the steel smelting module 4, the gas distribution unit 21 can deliver coal gas containing methane to the reforming reaction unit 71 for reforming reaction. The reforming reaction unit 71 can provide the corresponding reforming reaction conditions, as described below: first, the coal gas and external water vapor are introduced into the reforming reaction unit 71; then, the controller instructs the reforming reaction unit 71 to change the internal environment to the conditions for the reaction of methane and water vapor; then, a metal such as nickel (Ni) or palladium (Pd) is introduced into the reforming reaction unit 71 as a catalyst; in this process, CH4+H2O->CO+3H2; then, the controller will instruct the reforming reaction unit 71 to change the internal environment to the conditions for the reaction of carbon monoxide and water vapor, and introduce the corresponding catalyst, CO+H2O->CO2+H2, at this time, more hydrogen is produced; then, the reforming reaction unit 71 delivers the generated gas to the gas separation unit 72; then, the gas separation unit 72 separates the received gas into hydrogen (i.e., pure hydrogen) and carbon dioxide; then, the gas separation unit 72 delivers the pure hydrogen to the pure hydrogen storage container 5 and the carbon dioxide to the catalytic combustion unit 3. This design achieves the secondary use of coal gas, completes the preparation of pure hydrogen while steelmaking, and does not need to use an electrolysis device to prepare pure hydrogen separately. The prepared pure hydrogen is then stored in a number of pure hydrogen storage containers 5. The present embodiment to some extent eliminates the step of preparing hydrogen by electrolysis, and also reduces the amount of pure hydrogen storage containers 5 occupied, thereby improving work efficiency.

[0078] As shown in the accompanying drawings, Figure 5 The present embodiment also discloses a collaborative blowing method, which is based on the aforementioned steel smelting system with catalytic combustion function and comprises the following steps:

[0079] Step S101: Deliver the coal gas produced by the vanadium extraction converter unit and the decarburization converter unit to the gas distribution unit;

[0080] Step S103: The gas distribution unit divides the received coal gas into the first branch pipe and the second branch pipe. The coal gas in the first branch pipe is delivered to the vanadium extraction converter unit as blowing gas, and the coal gas in the second branch pipe is delivered to the hydrogen-rich gas preparation unit;

[0081] Step S105: The hydrogen-rich gas preparation unit prepares the coal gas in the second branch pipe into hydrogen-rich reducing gas;

[0082] Step S107: Mix the prepared hydrogen-rich reducing gas with the pure hydrogen gas in the pure hydrogen storage container, and deliver the mixture to the decarburization converter unit as blowing gas.

[0083] In actual use, the collaborative blowing method can reasonably allocate the coal gas generated by the vanadium extraction converter unit 41 and the decarburization converter unit 42, and realize the optimized use of resources. In addition, the collaborative blowing method can make the coal gas into a hydrogen-rich reducing gas, mix it with pure hydrogen gas, and then deliver it to the decarburization converter unit 42 as a blowing gas, which can improve the reduction reaction rate and effect in the decarburization converter unit 42, thereby improving the efficiency and quality of steel smelting, and to a certain extent, also helps to reduce energy consumption and carbon emissions, thus having certain economic and environmental benefits.

[0084] The above only describes optional embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the embodiments of the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Steel smelting system with catalytic combustion function, characterized by, The application relates to a gas distribution and preparation module (2) which is provided with a steel smelting module (4) at an air inlet end, and comprises: a gas distribution unit (21) which is directly or indirectly connected with an air outlet end of the steel smelting module (4) at an air inlet end, and is provided with the steel smelting module (4) at an air outlet end; a hydrogen-rich gas preparation unit (22) which is connected with an air outlet end of the gas distribution unit (21) at an air inlet end, and is provided with the steel smelting module (4) and a pure hydrogen storage container (5) at an air outlet end, namely the steel smelting module (4) is provided with the hydrogen-rich gas preparation unit (22) and the pure hydrogen storage container (5) at an air inlet end; wherein the air outlet end of the gas distribution unit (21) is directly or indirectly provided with a catalytic combustion unit (3), and the catalytic combustion unit (3) is used for processing residual coal gas which is not required to be transported back to the steel smelting module (4) for use as a blowing gas at present. The steel smelting module (4) comprises: a vanadium extraction converter unit (41) which is directly or indirectly connected with an air inlet end of the gas distribution unit (21) at an air outlet end, and is connected with the air outlet end of the gas distribution unit (21) at an air inlet end; and a decarburization converter unit (42) which is directly or indirectly connected with an air inlet end of the gas distribution unit (21) at an air outlet end, and is provided with the hydrogen-rich gas preparation unit (22) and the pure hydrogen storage container (5) at an air inlet end.

2. The steel smelting system with catalytic combustion function according to claim 1, characterized in that, The application further comprises:

3. The steel smelting system with catalytic combustion function according to claim 2, characterized in that, A coal gas purification module (1) which is provided with the vanadium extraction converter unit (41) and the decarburization converter unit (42) at an air inlet end, and is connected with an air inlet end of the gas distribution unit (21) at an air outlet end, and is used for removing useless components in coal gas transported by the vanadium extraction converter unit (41) and the decarburization converter unit (42). The coal gas purification module (1) comprises: a vanadium extraction coal gas purification unit (11) which is connected with an air outlet end of the vanadium extraction converter unit (41) at an air inlet end, and is connected with an air inlet end of the gas distribution unit (21) at an air outlet end; and a decarburization coal gas purification unit (12) which is connected with an air outlet end of the decarburization converter unit (42) at an air inlet end, and is connected with an air inlet end of the gas distribution unit (21) at an air outlet end.

4. The steel smelting system with catalytic combustion function according to claim 3, characterized in that, The application further comprises:

5. The steel smelting system with catalytic combustion function according to any one of claims 1-4, characterized in that, A waste heat collection module (6) which is connected with an air outlet end of the catalytic combustion unit (3) at an air inlet end. The waste heat collection module (6) comprises: a waste heat power generation unit (61) which is connected with an air outlet end of the catalytic combustion unit (3) at an air inlet end, and is used for converting waste heat generated by the catalytic combustion unit (3) into electric energy.

6. The steel smelting system with catalytic combustion function according to claim 5, characterized in that, ​ 7. The steel smelting system with catalytic combustion function according to claim 6, characterized in that, The waste heat collection module (6) further comprises: a carbon dioxide collection unit (62), the gas inlet end of the carbon dioxide collection unit (62) is connected with the gas outlet end of the catalytic combustion unit (3), and the carbon dioxide collection unit (62) is used for collecting carbon dioxide that cannot be treated in the catalytic combustion unit (3).

8. The steel smelting system with catalytic combustion function according to any one of claims 1-4, 6 or 7, characterized in that, Further comprising: A reforming and separating module (7), the gas inlet end of the reforming and separating module (7) is connected with the gas outlet end of the gas distribution unit (21), and the gas outlet end of the reforming and separating module (7) is provided with the pure hydrogen storage container (5) and the catalytic combustion unit (3).

9. The steel smelting system with catalytic combustion function according to claim 8, characterized in that, The reforming and separating module (7) comprises: a reforming reaction unit (71), the gas inlet end of which is connected with the gas outlet end of the gas distribution unit (21); and a gas separation unit (72), the gas inlet end of which is connected with the gas outlet end of the reforming reaction unit (71), and the gas outlet end of the gas separation unit (72) is provided with the pure hydrogen storage container (5) and the catalytic combustion unit (3).

10. A synergistic blowing method for the steelmaking system with catalytic combustion function as claimed in any one of claims 2 to 4, claim 6, claim 7 or claim 9, characterized in that, The method comprises the following steps: step S101, delivering the coal gas generated by the vanadium extraction converter unit and the decarburization converter unit to the gas distribution unit; step S103, the gas distribution unit divides the received coal gas into a first branch pipe and a second branch pipe, the coal gas in the first branch pipe is delivered to the vanadium extraction converter unit as injection gas, and the coal gas in the second branch pipe is delivered to the hydrogen-rich gas preparation unit; step S105, the hydrogen-rich gas preparation unit prepares the coal gas in the second branch pipe into hydrogen-rich reducing gas; and step S107, mixing the prepared hydrogen-rich reducing gas with the pure hydrogen gas in the pure hydrogen storage container and delivering the mixture to the decarburization converter unit as injection gas.

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