Low-carbon-consumption hydrogen-rich gas temperature-regulating and tempering device and method for hydrogen-rich carbon circulating oxygen blast furnace

Abstract

The invention belongs to the technical field of blast furnace ironmaking, and particularly discloses a low-carbon-consumption hydrogen-rich coal gas temperature-regulating and tempering device for a hydrogen-rich carbon circulating oxygen blast furnace, which comprises a primary electric heating device and a secondary temperature-increasing and tempering device, the primary electric heating device is communicated with a decarburized coal gas pipeline and a steam nozzle, and the secondary electric heating device is communicated with a secondary temperature-increasing and tempering device; the outlet end of the first-stage electric heating device is provided with a first-stage decarburized coal gas temperature monitor, and an oxygen and hydrogen-rich gas nozzle is arranged on a pipeline through which the first-stage electric heating device and the second-stage temperature raising and tempering device are communicated with each other. The problems that when the hydrogen-rich coal gas is not subjected to tempering cracking, the extraction efficiency of iron ore is reduced, and harmful gas is generated due to insufficient combustion are solved. By arranging the temperature adjusting device, the technical difficulty that a traditional blast furnace is flammable and combustible is overcome, furnace changing operation is not needed, compared with a traditional hot blast stove heating mode, the device is safer, an electric heating mode is adopted in the first stage, the problem that carbon consumption is increased due to hot blast stove gas heating is solved, and conditions are created for reducing carbon emission by applying green electricity to heat gas.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace ironmaking, and in particular to a hydrogen-rich coal gas temperature regulating and tempering device and a temperature regulating and tempering method for a hydrogen-rich carbon circulating oxygen blast furnace with low carbon consumption. Background Art

[0002] Blast furnace ironmaking is a steel production process that mixes iron-containing raw materials (such as iron ore, sintered ore, pelletized ore, etc.) with fuels (such as coke, coal powder, etc.) and auxiliary raw materials in a certain proportion, and blows hot air into the blast furnace through the tuyere along the furnace circumference at the bottom of the blast furnace to make the raw materials react chemically at high temperature to produce liquid pig iron. In order to improve the ironmaking efficiency of the blast furnace and reduce carbon emissions, a new ironmaking process, called hydrogen-rich carbon cycle oxygen blast furnace, is produced by adding hydrogen-rich carbon cycle and oxygen injection on the basis of the traditional blast furnace ironmaking process.

[0003] The hydrogen-rich carbon circulating oxygen blast furnace adopts the traditional blast furnace heating technology, which uses the hot blast furnace process to heat the coal gas to 1200℃, and adopts the self-circulation technology after decarbonization of the output coal gas, which greatly reduces the carbon emissions of the iron-making process. The 430-meter-high hydrogen-rich carbon circulating oxygen blast furnace has achieved an impressive result of reducing fossil energy consumption by more than 30%. However, in the process of heating the decarbonized coal gas with the traditional hot blast furnace, in order to protect the heat-resistant layer of the inner wall of the hot blast furnace, the hot blast furnace cannot be heated continuously. Usually, multiple hot blast furnaces are used for furnace exchange and heating. There is a high safety risk of heating with multiple hot blast furnaces. If the operation is wrong, the high-temperature and high-pressure coal gas will cause serious safety accidents. In addition, the carbon emissions of the hot blast furnace heated by burning coal gas are still high. In order to reduce the carbon emissions of traditional processes, the current hydrogen-rich metallurgical process uses coke oven gas or natural gas for heating.

[0004] However, the hydrogen-rich coal gas must complete the tempering and cracking reaction. If tempering and cracking are not carried out, the incompletely reduced substances in the hydrogen-rich coal gas will reduce the reducing ability of the iron ore, which will not only reduce the extraction efficiency of the iron ore, but also produce harmful gases due to incomplete combustion, posing potential risks to the environment and human health. Summary of the invention

[0005] The purpose of the present invention is to provide a hydrogen-rich coal gas temperature control and tempering device and a temperature control and tempering method with low carbon consumption in a hydrogen-rich carbon circulating oxygen blast furnace, so as to solve the problem that when the hydrogen-rich coal gas is not tempered and cracked, the extraction efficiency of iron ore will be reduced, and harmful gases will be produced due to incomplete combustion, posing potential risks to the environment and human health.

[0006] To achieve the above-mentioned purpose, the basic scheme provided by the present invention is: a hydrogen-rich coal gas temperature adjustment and tempering device with low carbon consumption in a hydrogen-rich carbon cycle oxygen blast furnace, comprising a primary electric heating device and a secondary temperature raising and tempering device, the primary electric heating device is connected with a decarbonized coal gas pipeline and a steam nozzle, the outlet end of the primary electric heating device is connected with the inlet end of the secondary temperature raising and tempering device through a pipeline, a primary decarbonized coal gas temperature monitor is provided at the outlet end of the primary electric heating device, the primary decarbonized coal gas temperature monitor is electrically connected to the valve at the outlet end of the primary electric heating device, oxygen and hydrogen-rich gas nozzles are provided on the pipeline interconnected between the primary electric heating device and the secondary temperature raising and tempering device, the oxygen and hydrogen-rich gas nozzles are connected with an oxygen pipeline and a hydrogen-rich gas pipeline, the secondary temperature raising and tempering device is connected with a high-temperature hydrogen-rich decarbonized coal gas pipeline, a secondary hydrogen-rich decarbonized coal gas temperature detector is provided at the outlet end of the secondary temperature raising and tempering device, and the secondary hydrogen-rich decarbonized coal gas temperature detector is electrically connected to the valve at the outlet end of the secondary temperature raising and tempering device.

[0007] The working principle of the present invention is as follows: when it is necessary to adjust the temperature of the hydrogen-rich gas for cracking, firstly, the coal gas output from the oxygen blast furnace is subjected to carbon dioxide removal treatment to form decarbonized coal gas, and then the decarbonized coal gas is introduced into the primary electric heating device from the decarbonized coal gas pipeline. At the same time, water vapor is sprayed into the primary electric heating device from the steam nozzle, and the decarbonized coal gas and water vapor are heated by the primary electric heating device to form high-temperature water-rich coal gas. When the temperature detected by the primary decarbonized coal gas temperature monitor reaches above 750°C, the primary decarbonized coal gas temperature monitor opens the valve at the outlet end of the primary electric heating device to allow the high-temperature water-rich coal gas to enter the secondary temperature raising and tempering device, and oxygen and hydrogen-rich gas are sprayed into the secondary temperature raising and tempering device through the oxygen and hydrogen-rich gas nozzles. The oxygen The shut-off valves on the pipeline and the hydrogen-rich gas pipeline are fully open. No external ignition source is required. Oxygen and hydrogen-rich gas directly react with the decarbonized coal gas to release heat. This heat raises the temperature of the 750°C decarbonized coal gas to above 1000°C, and the macromolecules in the injected hydrogen-rich gas are cracked and react with H20 and CO2 in the decarbonized coal gas to finally form CO and H2, thereby completing the cracking. When the temperature detected by the secondary hydrogen-rich decarbonized coal gas temperature detector reaches the preset target temperature, the secondary hydrogen-rich decarbonized coal gas temperature detector opens the valve at the outlet end of the secondary temperature raising and tempering device, and finally the hydrogen-rich decarbonized coal gas above 1000°C enters the blast furnace to replace carbon to complete a series of physical and chemical reactions in the blast furnace, thereby achieving the goal of reducing the fossil energy consumption of the blast furnace ironmaking process.

[0008] The beneficial effects of the present invention are as follows: by setting a temperature regulating device, decarbonized coal gas and hydrogen-rich coal gas are introduced into the electric heating device, and the heated high-temperature coal gas enters the secondary temperature rising and tempering device, during which coal gas can be continuously supplied and heated continuously without the need for furnace changing operations, thus overcoming the technical difficulties of flammability and explosion of traditional blast furnaces. It is safer than the traditional hot blast furnace heating method, and the first stage adopts an electric heating method, which eliminates the problem of increased carbon consumption caused by hot blast furnace coal gas heating, creating conditions for using green electricity to heat coal gas to achieve carbon emission reduction.

[0009] Option 2 is the preferred option of the basic option. The decarbonized gas pipeline is provided with a decarbonized gas C0 and CO2 component detector. By setting up the decarbonized gas C0 and CO2 component detector, the real-time data provided by the detector can be used, and the operator can adjust the production process parameters in time.

[0010] Option three is a preferred option of the basic option, in which both the oxygen pipeline and the hydrogen-rich gas pipeline are provided with control valve groups.

[0011] Option 4 is a preferred option of Option 3. The control valve group includes two manual gate valves, a flow regulating valve, a flow meter, a shut-off valve and a damper. By setting up two manual gate valves, the flow of gas in the pipeline can be completely cut off during pipeline maintenance. The flow regulating valve can accurately adjust the gas flow rate according to actual needs. The flow meter can detect the flow rate of gas in the pipeline in real time and provide accurate flow data for operators. The shut-off valve can quickly cut off the flow of the fluid. The damper can effectively reduce the impact and vibration of the fluid in the pipeline.

[0012] Option five is the preferred option of the basic option. A decarbonized gas pressure detector is provided on the decarbonized gas pipeline. The decarbonized gas pressure detector is provided on the decarbonized gas pipeline to monitor the pressure changes of the decarbonized gas in real time, thereby promptly detecting abnormal pressure conditions in the system.

[0013] Scheme 6, which is a preferred embodiment of schemes 1 to 5, comprises the following steps:

[0014] S1, firstly, removing carbon dioxide from the oxygen blast furnace output gas to form decarbonized gas;

[0015] S2, passing the decarbonized coal gas into a primary electric heating device and spraying water vapor into the device, the primary electric heating device heats the decarbonized coal gas and water vapor to above 750°C to form high-temperature water-rich coal gas;

[0016] S3, passing the high-temperature water-rich coal gas into the secondary temperature raising and tempering device, and spraying oxygen and hydrogen-rich gas into the secondary temperature raising and tempering device through the oxygen and hydrogen-rich gas nozzles, without the need for an external ignition source, the oxygen and hydrogen-rich gas directly react with the decarbonized coal gas to release heat, this part of the heat raises the temperature of the 750°C decarbonized coal gas to above 1000°C, and the macromolecules in the injected hydrogen-rich gas are cracked and react with H20 and CO2 in the decarbonized coal gas to finally form CO and H2, thereby completing the cracking; through the above steps, the macromolecules in the injected hydrogen-rich gas can be cracked and react with H20 and CO2 in the decarbonized coal gas to generate CO and H2, thereby achieving the purpose of tempering the hydrogen-rich coal gas, thereby achieving the goal of reducing the fossil energy consumption of the blast furnace ironmaking process.

[0017] Scheme seven is the preferred option of scheme six. In S1, the volume percentages of the components in the decarbonized coal gas are 40-75% CO, 8-21% C02, 2-12% H2, and 2-10% H2O.

[0018] Option 8 is a preferred option of Option 6. In S2, the hydrogen-carbon ratio of the water vapor and the decarbonized coal gas injected into the primary electric heating device is 1.5-2. By controlling the hydrogen-carbon ratio, carbon deposition reaction of the decarbonized coal gas in the primary electric heating device can be prevented.

[0019] Option nine is the preferred option of option six. In S3, the oxygen injection amount is adjusted by comparing the temperature detected by the secondary hydrogen-rich decarbonization coal gas temperature detector with the target temperature. When the target temperature needs to be increased, the opening of the flow regulating valve on the oxygen pipeline is increased to increase the oxygen injection amount. When the outlet coal gas temperature needs to be lowered, the opening of the flow regulating valve on the oxygen pipeline is reduced to reduce the oxygen injection amount. By increasing the target temperature, the oxygen amount is increased; by lowering the target temperature, the oxygen amount is reduced; by lowering the target temperature, the oxygen amount is reduced. The oxygen injection amount can be adjusted dynamically and in real time, so that the actual coal gas outlet temperature of the tempering conversion device accurately reaches the set target temperature.

[0020] Option 10 is the preferred option of Option 6. When the CO2 content of the decarbonized coal gas decreases by 1-2%, the injection amount of water vapor increases by 1-5%. When the injection amount of the hydrogen-rich gas increases by 1-2%, the injection amount of water vapor increases by 2-4%. By increasing the injection amount of water vapor, sufficient water vapor is provided for the cracking and tempering reaction of the hydrogen-rich gas in the secondary temperature and tempering device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention discloses a flow chart of a hydrogen-rich coal gas temperature regulating and tempering device with low carbon consumption in a hydrogen-rich carbon cycle oxygen blast furnace. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below through specific embodiments:

[0023] The figure marks in the drawings of the specification include: 1. Primary electric heating device; 2. Secondary temperature raising and tempering device; 3. Oxygen and hydrogen-rich gas nozzles; 4. Decarbonized coal gas pipeline; 5. High-temperature hydrogen-rich decarbonized coal gas pipeline; 6. Oxygen pipeline; 7. Hydrogen-rich gas pipeline; 8. Primary decarbonized coal gas temperature detector; 9. Secondary hydrogen-rich decarbonized coal gas temperature detector; 10. Decarbonized coal gas pressure detector; 11. Decarbonized coal gas CO, CO2 component detector.

[0024] Example 1

[0025] like Figure 1 As shown: a hydrogen-rich coal gas temperature adjustment and tempering device with low carbon consumption in a hydrogen-rich carbon cycle oxygen blast furnace, comprising a primary electric heating device 1 and a secondary temperature raising and tempering device 2, the primary electric heating device 1 is connected with a decarbonized coal gas pipeline 4 and a steam nozzle 12, the decarbonized coal gas pipeline 4 is respectively provided with a decarbonized coal gas pressure detector 10 and a decarbonized coal gas CO, CO2 component detector 11, the outlet end of the primary electric heating device 1 is connected with the inlet end of the secondary temperature raising and tempering device 2 through a pipeline, the outlet end of the primary electric heating device 1 is provided with a primary decarbonized coal gas temperature monitor 8, the primary decarbonized coal gas temperature monitor 8 is electrically connected to the valve at the outlet end of the primary electric heating device 1 An oxygen and hydrogen-rich gas nozzle 3 is provided on the pipeline interconnected by the primary electric heating device 1 and the secondary temperature raising and tempering device 2. The oxygen and hydrogen-rich gas nozzle 3 is connected with an oxygen pipeline 6 and a hydrogen-rich gas pipeline 7. Both the oxygen pipeline 6 and the hydrogen-rich gas pipeline 7 are provided with a control valve group, and the control valve group includes two manual gate valves, a flow regulating valve, a flow meter, a cut-off valve and a damper. A high-temperature hydrogen-rich decarbonized coal gas pipeline 5 is connected to the secondary temperature raising and tempering device 2. A secondary hydrogen-rich decarbonized coal gas temperature detector 9 is provided at the outlet end of the secondary temperature raising and tempering device 2. The secondary hydrogen-rich decarbonized coal gas temperature detector 9 is electrically connected to the valve at the outlet end of the secondary temperature raising and tempering device 2.

[0026] The implementation method of this embodiment is as follows: when it is necessary to adjust the temperature of the hydrogen-rich gas for cracking, firstly, the coal gas output from the oxygen blast furnace is subjected to carbon dioxide removal treatment to form decarbonized coal gas, and then the decarbonized coal gas is introduced into the primary electric heating device 1 from the decarbonized coal gas pipeline 4. At the same time, water vapor is sprayed into the primary electric heating device 1 from the steam nozzle 12, and the decarbonized coal gas and water vapor are heated by the primary electric heating device 1 to form a high-temperature coal gas rich in water. When the temperature detected by the primary decarbonized coal gas temperature monitor 8 reaches above 750°C, the primary decarbonized coal gas temperature monitor 8 opens the valve at the outlet end of the primary electric heating device 1 to allow the high-temperature coal gas rich in water to enter the secondary temperature raising and tempering device 2, and oxygen and hydrogen-rich gas are sprayed into the secondary temperature raising and tempering device 2 through the oxygen and hydrogen-rich gas nozzle 3. The shut-off valves on the oxygen pipeline 6 and the hydrogen-rich gas pipeline 7 are fully open, and no external ignition source is required. The oxygen and hydrogen-rich gas directly react with the decarbonized coal gas to release heat. This part of heat raises the temperature of the 750°C decarbonized coal gas to above 1000°C, and the macromolecules in the injected hydrogen-rich gas are cracked and react with H20 and CO2 in the decarbonized coal gas to finally form CO and H2, thereby completing the cracking. When the temperature detected by the secondary hydrogen-rich decarbonized coal gas temperature detector 9 reaches the preset target temperature, the secondary hydrogen-rich decarbonized coal gas temperature detector 9 opens the valve at the outlet end of the secondary temperature raising and tempering device 2, and finally the hydrogen-rich decarbonized coal gas above 1000°C enters the blast furnace to replace carbon to complete a series of physical and chemical reactions in the blast furnace, thereby achieving the goal of reducing the fossil energy consumption of the blast furnace ironmaking process.

[0027] Example 2

[0028] like Figure 1 As shown: A temperature control and tempering method for a hydrogen-rich coal gas temperature control and tempering device with low carbon consumption in a hydrogen-rich carbon cycle oxygen blast furnace, comprising the following steps:

[0029] S1, firstly, the oxygen blast furnace output gas is subjected to carbon dioxide removal treatment to form decarbonized gas, wherein the volume percentages of the components in the decarbonized gas are 70% CO, 15% C02, 10% H2, and 5% H2O respectively;

[0030] S2, passing the decarbonized coal gas into the primary electric heating device 1, and spraying water vapor, the primary electric heating device 1 heats the decarbonized coal gas and water vapor to above 750°C to form high-temperature water-rich coal gas, the hydrogen-carbon ratio of the water vapor and the decarbonized coal gas is 1.5-2;

[0031] S3, passing the high-temperature water-rich coal gas into the secondary temperature-raising and tempering device 2, and spraying oxygen and hydrogen-rich gas into the secondary temperature-raising and tempering device 2 through the oxygen and hydrogen-rich gas nozzle 3, without the need for an external ignition source, the oxygen and hydrogen-rich gas directly react with the decarbonized coal gas to release heat, this part of the heat raises the temperature of the 750°C decarbonized coal gas to above 1000°C, and the macromolecules in the sprayed hydrogen-rich gas are cracked and react with H20 and CO2 in the decarbonized coal gas to finally form CO and H2, thereby completing the cracking, By comparing the temperature detected by the secondary hydrogen-rich decarbonized coal gas temperature detector 9 with the target temperature, the oxygen injection amount is adjusted. When the target temperature needs to be increased, the opening of the flow regulating valve on the oxygen pipeline 6 is increased to increase the oxygen injection amount. When the outlet coal gas temperature needs to be lowered, the opening of the flow regulating valve on the oxygen pipeline 6 is reduced to reduce the oxygen injection amount. When the CO2 content of the decarbonized coal gas decreases by 2%, the water vapor injection amount increases by 5%; when the hydrogen-rich gas injection amount increases by 1%, the water vapor injection amount increases by 2%.

[0032] Through the above method, carbon emissions were reduced by more than 21% on a 430 cubic meter blast furnace test platform, fossil energy consumption in the entire process was reduced by more than 30%, and blast furnace capacity was increased by 40%. It can be seen that the use of the above method has created conditions for using green electricity to heat coal gas to reduce carbon emissions. Replacing carbon with green electricity has achieved a reduction in fossil energy and eliminated the problem of increased carbon consumption caused by hot blast furnace gas heating.

[0033] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A hydrogen-rich coal gas temperature adjustment and tempering device with low carbon consumption in a hydrogen-rich carbon cycle oxygen blast furnace, characterized in that: The invention comprises a primary electric heating device (1) and a secondary temperature raising and tempering device (2), wherein the primary electric heating device (1) is connected to a decarbonized coal gas pipeline (4) and a steam nozzle (12), the outlet end of the primary electric heating device (1) is connected to the inlet end of the secondary temperature raising and tempering device (2) through a pipeline, the outlet end of the primary electric heating device (1) is provided with a primary decarbonized coal gas temperature monitor (8), the primary decarbonized coal gas temperature monitor (8) is electrically connected to a valve at the outlet end of the primary electric heating device (1), and the primary electric heating device An oxygen and hydrogen-rich gas nozzle (3) is provided on a pipeline interconnected with the secondary temperature-raising and tempering device (1) and the secondary temperature-raising and tempering device (2); the oxygen and hydrogen-rich gas nozzle (3) is connected with an oxygen pipeline (6) and a hydrogen-rich gas pipeline (7); the secondary temperature-raising and tempering device (2) is connected with a high-temperature hydrogen-rich decarbonized coal gas pipeline (5); a secondary hydrogen-rich decarbonized coal gas temperature detector (9) is provided at the outlet end of the secondary temperature-raising and tempering device (2); the secondary hydrogen-rich decarbonized coal gas temperature detector (9) is electrically connected to a valve at the outlet end of the secondary temperature-raising and tempering device (2).

2. The device for adjusting temperature and tempering hydrogen-rich coal gas with low carbon consumption in a hydrogen-rich carbon cycle oxygen blast furnace according to claim 1, characterized in that: The decarbonized coal gas pipeline (4) is provided with a decarbonized coal gas CO and CO2 component detector (11).

3. The device for temperature regulating and tempering hydrogen-rich coal gas with low carbon consumption in a hydrogen-rich carbon cycle oxygen blast furnace according to claim 1, characterized in that: The oxygen pipeline (6) and the hydrogen-rich gas pipeline (7) are both provided with control valve groups.

4. A hydrogen-rich coal gas temperature adjustment and tempering device with low carbon consumption in a hydrogen-rich carbon cycle oxygen blast furnace according to claim 3, characterized in that: The control valve group includes two manual gate valves, a flow regulating valve, a flow meter, a cut-off valve and a damper.

5. The device for temperature regulating and tempering hydrogen-rich coal gas with low carbon consumption in a hydrogen-rich carbon cycle oxygen blast furnace according to claim 1, characterized in that: The decarbonized coal gas pipeline (4) is provided with a decarbonized coal gas pressure detector (10).

6. A method for adjusting temperature and tempering of a hydrogen-rich coal gas temperature and tempering device for a hydrogen-rich carbon cycle oxygen blast furnace with low carbon consumption according to any one of claims 1 to 5, comprising the following steps: S1, firstly, removing carbon dioxide from the oxygen blast furnace output gas to form decarbonized gas; S2, passing the decarbonized coal gas into a primary electric heating device (1) and injecting water vapor into the primary electric heating device (1), wherein the primary electric heating device (1) heats the decarbonized coal gas and water vapor to above 750° C. to form high-temperature water-rich coal gas; S3, the high-temperature water-rich coal gas is introduced into the secondary temperature raising and tempering device (2), and oxygen and hydrogen-rich gas are sprayed into the secondary temperature raising and tempering device (2) through the oxygen and hydrogen-rich gas nozzle (3). No external ignition source is required, and the oxygen and hydrogen-rich gas directly react with the decarbonized coal gas to release heat. This heat raises the temperature of the decarbonized coal gas at 750°C to above 1000°C, and the macromolecules in the sprayed hydrogen-rich gas are cracked and react with H20 and CO2 in the decarbonized coal gas to finally form CO and H2, thereby completing the cracking.

7. The temperature control and tempering method of a hydrogen-rich coal gas temperature control and tempering device with low carbon consumption in a hydrogen-rich carbon cycle oxygen blast furnace according to claim 6, characterized in that: In S1, the volume percentages of the various components in the decarbonized coal gas are 40-75% CO, 8-21% C02, 2-12% H2, and 2-10% H2O.

8. The method for temperature control and tempering of a hydrogen-rich coal gas temperature control and tempering device with low carbon consumption in a hydrogen-rich carbon cycle oxygen blast furnace according to claim 6, characterized in that: In S2, the hydrogen-to-carbon ratio of the water vapor and the decarbonized coal gas injected into the first-stage electric heating device (1) is 1.5-2.

9. According to the temperature control and tempering method of the temperature control and tempering device for the low carbon consumption hydrogen-rich coal gas of the hydrogen-rich carbon cycle oxygen blast furnace as described in claim 6, in S3, by comparing the temperature detected by the secondary hydrogen-rich decarbonized coal gas temperature detector (9) with the target temperature, the oxygen injection amount is adjusted. When the target temperature needs to be increased, the opening of the flow regulating valve on the oxygen pipeline (6) is increased to increase the oxygen injection amount. When the outlet coal gas temperature needs to be lowered, the opening of the flow regulating valve on the oxygen pipeline (6) is reduced to reduce the oxygen injection amount.

10. According to the temperature control and tempering method of the temperature control and tempering device of the hydrogen-rich coal gas with low carbon consumption in the hydrogen-rich carbon cycle oxygen blast furnace as described in claim 6, when the CO2 content of the decarbonized coal gas decreases by 1-2%, the injection amount of water vapor increases by 1-5%; when the injection amount of the hydrogen-rich gas increases by 1-2%, the injection amount of water vapor increases by 2-4%.

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