Furnace temperature control method and reaction device

Abstract

The present invention provides a furnace temperature control method and a reaction device, the furnace temperature control method comprising: obtaining the temperature T1 of the cooling water introduced into the water-cooled wall structure; obtaining the temperature T2 of the cooling water flowing out of the water-cooled wall structure; obtaining the temperature T3 of the synthesis gas flowing out of the quenching chamber; obtaining the temperature T4 of the synthesis gas flowing out of the first washing component; obtaining the temperature T5 of the synthesis gas flowing out of the second washing component; obtaining the components of the synthesis gas flowing out of the second washing component to obtain the methane content, carbon dioxide content, and carbon monoxide hydrogen content in the synthesis gas; judging whether the furnace temperature of the reaction chamber is appropriate based on T2-T1, T3, T3-T4, T5, methane content, carbon dioxide content, and carbon monoxide hydrogen content. The furnace temperature control method of the present application solves the problem that the monitoring method of the gasifier in the prior art easily causes the furnace temperature of the gasifier to be too high or too low, thereby affecting the effective gas yield.

Description

Technical Field

[0001] The present invention relates to the technical field of dry coal powder gasification, and in particular to a furnace temperature control method and a reaction device. Background Art

[0002] The dry coal powder pressurization, downward quenching, membrane water-cooled wall gasification process technology has become the mainstream development direction of modern coal gasification technology due to its wide range of coal applicability and low requirements on coal ash content.

[0003] In a dry pulverized coal gasifier, furnace temperature control is particularly important. When the furnace temperature is appropriate, the gasifier's effective gas yield is high. When the temperature is high, the carbon dioxide content in the synthesis gas is high, and the effective gas (carbon monoxide plus hydrogen) content is low. When the temperature is too high, the water-cooled wall is easily burned. When the temperature is low, although the carbon dioxide content in the synthesis gas is low and the effective gas (carbon monoxide plus hydrogen) content is high, the lower furnace temperature will lead to the production of more molten coal ash. The molten coal ash will cause blockage in the slag channel from the reaction chamber to the quenching chamber. In particular, when the molten coal ash blocks part of the cross-section of the downcomer, it will cause the synthesis gas to flow deviated, and the deviated synthesis gas will flush the downcomer. The cross-section of the downcomer refers to the cross-section of the downcomer perpendicular to its axial direction.

[0004] Therefore, controlling the appropriate furnace temperature is very important for dry coal pulverized gasifiers. However, the gasifier temperature is a parameter that cannot be directly monitored.

[0005] Currently, the existing technology only monitors the temperature of the water-cooled wall gasifier, which easily leads to the temperature of the gasifier being too high or too low, thereby affecting the effective gas yield (ie, the yield of carbon monoxide and hydrogen). Summary of the Invention

[0006] The main purpose of the present invention is to provide a furnace temperature control method and a reaction device to solve the problem in the prior art that the gasification furnace monitoring method easily causes the furnace temperature of the gasification furnace to be too high or too low, thereby affecting the effective gas yield.

[0007] To achieve the above-mentioned object, according to one aspect of the present invention, a furnace temperature control method is provided. The furnace temperature control method is applicable to a reaction device, wherein the reaction device includes a gasifier, the gasifier includes a reaction chamber and a quenching chamber, and the inner wall of the reaction chamber is configured as a water-cooled wall structure; the reaction device also includes a first washing assembly and a second washing assembly, the gasifier, the first washing assembly and the second washing assembly are sequentially connected and communicated so that the synthesis gas flowing out of the quenching chamber flows through the first washing assembly and the second washing assembly in sequence; the furnace temperature control method comprises: obtaining the temperature T1 of the cooling water introduced into the water-cooled wall structure ; Obtain the temperature T2 of the cooling water flowing out of the water-cooled wall structure; Obtain the temperature T3 of the synthesis gas flowing out of the quenching chamber; Obtain the temperature T4 of the synthesis gas flowing out of the first washing component; Obtain the temperature T5 of the synthesis gas flowing out of the second washing component; Obtain the components of the synthesis gas flowing out of the second washing component to obtain the methane content, carbon dioxide content, and carbon monoxide hydrogen content in the synthesis gas; Based on T2-T1, T3, T3-T4, T5, methane content, carbon dioxide content, and carbon monoxide hydrogen content, determine whether the furnace temperature of the reaction chamber is appropriate.

[0008] Furthermore, the furnace temperature control method includes: when the oxygen-coal ratio of the gasifier is in the range of 0.400 to 0.420, and when the value range of T2-T1 is 7°C to 10°C, and when the value range of T3 is 218°C to 222°C, and when the value range of T3-T4 is 3°C to 4°C, and when the value range of T5 is 208°C to 212°C, and when the value range of methane content is 0.015% to 0.030%, and when the value range of carbon dioxide content is 5.0% to 7.0%, and when the value range of carbon monoxide and hydrogen content is 90% to 92%, it is determined that the furnace temperature of the reaction chamber is appropriate.

[0009] Furthermore, the first condition is that the value range of T2-T1 is greater than 10°C, the second condition is that the value range of T3 is greater than 222°C, the third condition is that the value range of T5 is greater than 212°C, the fourth condition is that the methane content is less than 0.015%, and the fifth condition is that the carbon dioxide content is greater than 7.0%; when at least three of the first condition, the second condition, the third condition, the fourth condition and the fifth condition are met, it is determined that the furnace temperature of the reaction chamber is too high; and / or, the sixth condition is that the value range of T2-T1 is less than 7°C, the seventh condition is that the value range of T3 is less than 218°C, the eighth condition is that the value range of T5 is less than 208°C, the ninth condition is that the methane content is greater than 0.030%, and the tenth condition is that the carbon dioxide content is less than 5.0%; when at least three of the sixth condition, the seventh condition, the eighth condition, the ninth condition and the tenth condition are met, it is determined that the furnace temperature of the reaction chamber is too low.

[0010] Furthermore, when it is determined that the furnace temperature of the reaction chamber is too high, the furnace temperature control method includes: reducing the oxygen-coal ratio by an adjustment range of 0.005 each time; wherein, when [(T2-T1)-10]≤4°C, the upper limit of adjustment of the oxygen-coal ratio is [(T2-T1)-10]*0.005; when [(T2-T1)-10]>4°C, the upper limit of adjustment of the oxygen-coal ratio is [(T2-T1)-10] / 2*0.005; when [(T2-T1)-10]≥25°C, the gasifier trips.

[0011] Furthermore, when it is determined that the furnace temperature of the reaction chamber is too low, the furnace temperature control method includes: increasing the oxygen-coal ratio by an adjustment range of 0.005 each time; wherein, when [7-(T2-T1)]≤2°C, the upper limit of the adjustment of the oxygen-coal ratio is [7-(T2-T1)]*0.005; when [7-(T2-T1)]>2°C, the upper limit of the adjustment of the oxygen-coal ratio is [7-(T2-T1)] / 2*0.005.

[0012] Furthermore, the furnace temperature control method includes: when the coal feeding amount of the gasifier is less than 80%, the amount of sub-high-pressure steam added to the reaction chamber is 2000 kg / h; when the coal feeding amount of the gasifier is higher than 80%, the amount of sub-high-pressure steam added to the reaction chamber is [2000-30*Q] kg / h; Q is the coal feeding amount increased by the gasifier per hour.

[0013] According to another aspect of the present invention, a reaction device is provided, which is suitable for the above-mentioned furnace temperature control method; the reaction device includes: a first temperature detection element, the first temperature detection element is used to detect the temperature of the cooling water introduced into the water-cooled wall structure; and / or a second temperature detection element, the second temperature detection element is used to detect the temperature of the cooling water flowing out of the water-cooled wall structure; and / or a third temperature detection element, the third temperature detection element is used to detect the temperature of the synthesis gas flowing out of the quenching chamber; and / or a fourth temperature detection element, the fourth temperature detection element is used to detect the temperature of the synthesis gas flowing out of the first washing component; and / or a fifth temperature detection element, the fifth temperature detection element is used to detect the temperature of the synthesis gas flowing out of the second washing component; and / or a gas composition analyzer, the gas composition analyzer is used to analyze the components of the synthesis gas flowing out of the second washing component.

[0014] Furthermore, the first washing assembly includes a first scrubber and a gas-liquid separation tank, and the gasifier, the first scrubber and the gas-liquid separation tank, and the second washing assembly are connected and communicated in sequence so that the synthesis gas flowing out of the quenching chamber flows through the first scrubber, the gas-liquid separation tank and the second washing assembly in sequence.

[0015] Furthermore, the second washing assembly includes a second scrubber and a washing tower, and the gasifier, the first washing assembly, the second scrubber and the washing tower are connected and communicated in sequence so that the synthesis gas flowing out of the quenching chamber flows through the first washing assembly, the second scrubber and the washing tower in sequence.

[0016] Furthermore, the reaction device also includes a circulation pipeline, a circulation water pump and a refrigeration component, and the circulation water pump and the refrigeration component are both arranged on the circulation pipeline; the two ends of the circulation pipeline are respectively connected and communicated with the water inlet and water outlet of the water-cooled wall structure; the first temperature detection component is arranged on the pipe section at the water inlet of the water-cooled wall structure, and the second temperature detection component is arranged on the pipe section at the water outlet of the water-cooled wall structure.

[0017] Furthermore, the reaction device also includes a main gas outlet pipe, a first branch pipe and a second branch pipe, the first pipe opening of the main gas outlet pipe is connected and communicated with the synthesis gas outlet of the second washing component; the first pipe opening of the first branch pipe and the first pipe opening of the second branch pipe are both connected and communicated with the second pipe opening of the main gas outlet pipe; the fifth temperature detection component is arranged on the main gas outlet pipe; the first branch pipe and the second branch pipe can be set to be on and off; and a gas component analyzer is arranged on the first branch pipe.

[0018] According to the technical solution of the present invention, the reaction device applicable to the furnace temperature control method includes a gasifier, the gasifier includes a reaction chamber and a quenching chamber, and the inner wall of the reaction chamber is configured as a water-cooled wall structure; the reaction device also includes a first washing assembly and a second washing assembly, the gasifier, the first washing assembly and the second washing assembly are sequentially connected and communicated so that the synthesis gas flowing out of the quenching chamber flows through the first washing assembly and the second washing assembly in sequence; the furnace temperature control method includes: obtaining the temperature T1 of the cooling water introduced into the water-cooled wall structure; obtaining the temperature T2 of the cooling water flowing out of the water-cooled wall structure; obtaining the temperature T3 of the synthesis gas flowing out of the quenching chamber; obtaining the temperature T4 of the synthesis gas flowing out of the first washing assembly; obtaining the temperature T5 of the synthesis gas flowing out of the second washing assembly; obtaining the components of the synthesis gas flowing out of the second washing assembly to obtain the methane content, carbon dioxide content, and carbon monoxide hydrogen content in the synthesis gas; and judging whether the furnace temperature of the reaction chamber is appropriate based on T2-T1, T3, T3-T4, T5, methane content, carbon dioxide content, and carbon monoxide hydrogen content.

[0019] The furnace temperature control method of the present application characterizes the furnace temperature of the reaction chamber by the temperature difference T2-T1, T3 between the inlet and outlet cooling water, the temperature difference T3-T4, T5 of the synthesis gas, the methane content in the synthesis gas, the carbon dioxide content in the synthesis gas, and the carbon monoxide hydrogen content in the synthesis gas, and monitors the reaction device as a whole, thereby facilitating more effective monitoring of the furnace temperature of the reaction chamber, so as to control the furnace temperature of the reaction chamber at an appropriate temperature, avoid the furnace temperature of the reaction chamber being too high or too low, thereby achieving a higher effective gas yield, and improving the effective gas yield. It can be seen that the furnace temperature control method of the present application solves the problem in the prior art that the monitoring method of the gasifier easily leads to the furnace temperature of the gasifier being too high or too low, thereby affecting the effective gas yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 A schematic structural diagram of a reaction device according to the present invention is shown;

[0022] Figure 2 A schematic structural diagram of a gasifier according to a reaction device of the present invention is shown.

[0023] The above drawings include the following reference numerals:

[0024] 10. Gasifier; 11. Reaction chamber; 111. Water-cooled wall structure; 12. Quenching chamber; 121. First gas outlet; 13. Downcomer;

[0025] 20. First washing assembly; 21. First scrubber; 22. Gas-liquid separation tank; 30. Second washing assembly; 31. Second scrubber; 32. Scrubber;

[0026] 40. Circulating pipeline; 41. Circulating water pump; 42. Circulating water tank; 43. Circulating water drum;

[0027] 51. Main outlet pipe; 52. First branch pipe; 521. First control valve; 53. Second branch pipe; 531. Second control valve;

[0028] 61. Pulverized coal pipeline; 62. Steam pipeline;

[0029] 91. First temperature detection element; 92. Second temperature detection element; 93. Third temperature detection element; 94. Fourth temperature detection element; 95. Fifth temperature detection element; 96. Gas composition analyzer. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] The invention provides a furnace temperature control method, which is applicable to a reaction device.

[0034] Please refer to Figure 1 and Figure 2 The reaction device includes a gasifier 10, which includes a reaction chamber 11 and a quenching chamber 12; the coal powder reacts in the reaction chamber 11 to generate synthesis gas; the synthesis gas includes hydrogen and carbon monoxide; during the reaction of the coal powder in the reaction chamber 11, liquid slag is generated.

[0035] The gasifier 10 also includes a downcomer 13 extending in a vertical direction. The reaction chamber 11 is located above the quenching chamber 12. The upper end of the downcomer 13 is connected to the bottom end of the reaction chamber 11. The lower end of the downcomer 13 extends into the quenching chamber 12. The lower end of the downcomer 13 is spaced apart from the bottom wall of the quenching chamber 12 so that a space for gas circulation is formed between the lower end of the downcomer 13 and the bottom wall of the quenching chamber 12. The inner wall of the downcomer 13 is provided with a spray structure for spraying quenching water into the tube cavity of the downcomer 13. Optionally, the spray structure is connected to a component that provides quenching water from the outside to enable the quenching water to be sprayed into the downcomer 13 through the spray structure.

[0036] The higher-temperature synthesis gas and liquid slag produced in the reaction chamber 11 leave the reaction chamber 11 together and enter the downcomer 13 together; the synthesis gas and liquid slag entering the downcomer 13 flow downward along the downcomer 13; in the process of the synthesis gas and liquid slag flowing downward along the downcomer 13, the injection structure sprays quenching water into the downcomer 13 to cool the synthesis gas in the downcomer 13, and at the same time, the liquid slag is cooled into solid slag by the quenching water; the solid slag flows out from the bottom end of the downcomer 13 and falls to the bottom of the quenching chamber 12; the synthesis gas cooled by the quenching water flows out from the bottom end of the downcomer 13 into the quenching chamber 12, and then flows out from the air outlet of the quenching chamber 12; the synthesis gas flowing out of the quenching chamber 12 refers to the synthesis gas flowing out from the air outlet of the quenching chamber 12. Figure 1 The first air outlet 121 is the air outlet of the quenching chamber 12.

[0037] The inner wall of the reaction chamber 11 is provided with a water-cooled wall structure 111, so that the water-cooled wall structure 111 is the main heat receiving part of the reaction chamber 11. Cooling water flows into the water-cooled wall structure 111 and flows out of the water-cooled wall structure 111 after the heated temperature rises, thereby forming a cooling water circulation.

[0038] In this embodiment, the reaction apparatus further includes a first scrubbing assembly 20 and a second scrubbing assembly 30. The gasifier 10, the first scrubbing assembly 20, and the second scrubbing assembly 30 are sequentially connected and communicated with each other, so that the syngas flowing out of the quench chamber 12 flows sequentially through the first scrubbing assembly 20 and the second scrubbing assembly 30. Specifically, the syngas inlet of the first scrubbing assembly 20 is connected and communicated with the gas outlet of the quench chamber 12, so that the syngas flowing out of the quench chamber 12 flows into the first scrubbing assembly 20.

[0039] Because the syngas flowing out of the quench chamber 12 contains impurities, the impure syngas is sequentially passed through the first scrubbing assembly 20 and the second scrubbing assembly 30 to scrub the impurities in the syngas. It should be noted that the impurities in the syngas primarily include coal slag or coal ash.

[0040] In this embodiment, the reaction device also includes a first temperature detection element 91, a second temperature detection element 92, a third temperature detection element 93, a fourth temperature detection element 94, a fifth temperature detection element 95 and a gas composition analyzer 96; the first temperature detection element 91 is used to detect the temperature of the cooling water flowing into the water-cooled wall structure 111; the second temperature detection element 92 is used to detect the temperature of the cooling water flowing out of the water-cooled wall structure 111; the third temperature detection element 93 is used to detect the temperature of the synthesis gas flowing out of the quenching chamber 12; the fourth temperature detection element 94 is used to detect the temperature of the synthesis gas flowing out of the first washing component 20; the fifth temperature detection element 95 is used to detect the temperature of the synthesis gas flowing out of the second washing component 30; the gas composition analyzer 96 is used to analyze the composition of the synthesis gas flowing out of the second washing component 30.

[0041] Optionally, the first temperature detecting element 91 , the second temperature detecting element 92 , the third temperature detecting element 93 , the fourth temperature detecting element 94 , and the fifth temperature detecting element 95 are all thermometers.

[0042] Specifically, the first temperature detecting element 91 is disposed on a pipeline that introduces cooling water into the water-cooled wall structure 111 .

[0043] Specifically, the second temperature detecting member 92 is disposed on the pipeline of the cooling water flowing out of the water-cooled wall structure 111 .

[0044] Specifically, the third temperature detecting member 93 is disposed on the pipeline between the gas outlet of the quenching chamber 12 and the synthesis gas inlet of the first scrubbing assembly 20 .

[0045] Specifically, the fourth temperature detecting member 94 is disposed on a pipeline between the syngas outlet of the first scrubbing assembly 20 and the syngas inlet of the second scrubbing assembly 30 .

[0046] Specifically, the fifth temperature detecting member 95 is disposed on a pipeline connected to and communicating with the synthesis gas outlet of the second scrubbing assembly 30 .

[0047] Specifically, the gas composition analyzer 96 is disposed on a pipeline connected to and in communication with the synthesis gas outlet of the second scrubbing assembly 30 .

[0048] Optionally, along the flow direction of the synthesis gas in the pipeline connected to the synthesis gas outlet of the second scrubbing assembly 30 , the fifth temperature detecting element 95 is located upstream of the gas composition analyzer 96 .

[0049] In this embodiment, the first washing component 20 includes a first scrubber 21 and a gas-liquid separation tank 22. The gasifier 10, the first scrubber 21, the gas-liquid separation tank 22 and the second washing component 30 are connected and communicated in sequence, so that the synthesis gas flowing out of the quenching chamber 12 flows through the first scrubber 21, the gas-liquid separation tank 22 and the second washing component 30 in sequence, and then the synthesis gas containing impurities flowing out of the quenching chamber 12 flows through the first scrubber 21, the gas-liquid separation tank 22 and the second washing component 30 in sequence, so that the first scrubber 21, the gas-liquid separation tank 22 and the second washing component 30 wash and remove impurities from the synthesis gas containing impurities in sequence.

[0050] It should be noted that the synthesis gas flowing out of the first washing assembly 20 refers to the synthesis gas flowing out of the gas-liquid separation tank 22 .

[0051] Specifically, the syngas inlet of the first scrubber 21 is connected and communicated with the gas outlet of the quench chamber 12 so that the syngas flowing out of the quench chamber 12 flows into the first scrubber 21. The syngas inlet of the first scrubber 21 is the syngas inlet of the first scrubbing assembly 20.

[0052] Specifically, the synthesis gas outlet of the first scrubber 21 is connected and communicated with the synthesis gas inlet of the gas-liquid separation tank 22 , so that the synthesis gas flowing out of the first scrubber 21 flows into the gas-liquid separation tank 22 .

[0053] Specifically, the synthesis gas outlet of the gas-liquid separation tank 22 is connected and communicated with the synthesis gas inlet of the second scrubbing assembly 30 , so that the synthesis gas flowing out of the gas-liquid separation tank 22 flows into the second scrubbing assembly 30 .

[0054] Specifically, the third temperature detecting member 93 is provided on the pipeline between the gas outlet of the quenching chamber 12 and the synthesis gas inlet of the first scrubber 21 .

[0055] Specifically, the fourth temperature detecting member 94 is disposed on a pipeline between the synthesis gas outlet of the gas-liquid separation tank 22 and the synthesis gas inlet of the second scrubbing assembly 30 .

[0056] Optionally, the first scrubber 21 is a Venturi scrubber; that is, the first scrubber 21 is a first-stage Venturi scrubber. A Venturi scrubber is a wet dust collector consisting of a Venturi tube condenser and a mist eliminator.

[0057] Optionally, the gas-liquid separation tank 22 is a Venturi gas-liquid separation tank, which is also a wet dust collector to separate the synthesis gas from the liquid containing impurities.

[0058] Specifically, the synthesis gas outlet of the gas-liquid separation tank 22 is located at the top of the gas-liquid separation tank 22 .

[0059] In this embodiment, the second washing assembly 30 includes a second scrubber 31 and a washing tower 32. The gasifier 10, the first washing assembly 20, the second scrubber 31 and the washing tower 32 are connected and communicated in sequence, so that the synthesis gas flowing out of the quenching chamber 12 flows through the first washing assembly 20, the second scrubber 31 and the washing tower 32 in sequence, and then the synthesis gas containing impurities flowing out of the quenching chamber 12 flows through the first washing assembly 20, the second scrubber 31 and the washing tower 32 in sequence, so that the first washing assembly 20, the second scrubber 31 and the washing tower 32 wash the synthesis gas containing impurities in sequence.

[0060] It should be noted that the synthesis gas flowing out of the second scrubbing assembly 30 refers to the synthesis gas flowing out of the scrubbing tower 32 .

[0061] Specifically, the gasifier 10, the first scrubber 21, the gas-liquid separator 22, the second scrubber 31, and the scrubber 32 are sequentially connected and communicated, so that the synthesis gas flowing out of the quenching chamber 12 flows through the first scrubber 21, the gas-liquid separator 22, the second scrubber 31, and the scrubber 32 in sequence, and then the synthesis gas containing impurities flowing out of the quenching chamber 12 flows through the first scrubber 21, the gas-liquid separator 22, the second scrubber 31, and the scrubber 32 in sequence, so that the first scrubber 21, the gas-liquid separator 22, the second scrubber 31, and the scrubber 32 sequentially scrub the synthesis gas containing impurities. The scrubber is a gas purification treatment equipment.

[0062] Specifically, the synthesis gas inlet of the second scrubber 31 is connected and communicated with the synthesis gas outlet of the gas-liquid separator 22, so that the synthesis gas flowing out of the gas-liquid separator 22 flows into the second scrubber 31. The synthesis gas inlet of the second scrubber 31 is the synthesis gas inlet of the second scrubbing assembly 30.

[0063] Specifically, the synthesis gas outlet of the second scrubber 31 is connected to and communicates with the synthesis gas inlet of the scrubbing tower 32 , so that the synthesis gas flowing out of the second scrubber 31 flows into the scrubbing tower 32 .

[0064] Specifically, the fourth temperature detecting member 94 is disposed on a pipeline between the synthesis gas outlet of the gas-liquid separation tank 22 and the synthesis gas inlet of the second scrubber 31 .

[0065] Optionally, the second scrubber 31 is a Venturi scrubber; that is, the second scrubber 31 is a two-stage Venturi scrubber.

[0066] Specifically, the synthesis gas outlet of the scrubbing tower 32 is located at the top of the scrubbing tower 32 .

[0067] In this embodiment, the reaction device also includes a circulation pipeline 40, a circulation water pump 41 and a refrigeration assembly, and the circulation water pump 41 and the refrigeration assembly are both arranged on the circulation pipeline 40; the two ends of the circulation pipeline 40 are respectively connected and communicated with the water inlet and water outlet of the water-cooled wall structure 111; that is, the first end of the circulation pipeline 40 is connected and communicated with the water inlet of the water-cooled wall structure 111, and the second end of the circulation pipeline 40 is connected and communicated with the water outlet of the water-cooled wall structure 111; the first temperature detection component 91 is arranged on the pipe section at the water inlet of the water-cooled wall structure 111, and the second temperature detection component 92 is arranged on the pipe section at the water outlet of the water-cooled wall structure 111.

[0068] Specifically, along the water flow direction of the circulation pipeline 40 , the circulation water pump 41 is located on one side of the refrigeration assembly close to the water inlet of the water-cooled wall structure 111 , so as to supply cooling water into the water-cooled wall structure 111 .

[0069] Specifically, the refrigeration component is used to refrigerate the heated water flowing out of the water-cooled wall structure 111 to reduce the temperature of the cooling water.

[0070] Specifically, the refrigeration assembly includes a circulating water tank 42 and a circulating water drum 43, both of which are located on the circulation pipeline 40. The circulating water tank 42 is used to store water, while the circulating water drum 43 is used to cool the heated water flowing out of the water-cooled wall structure 111. The circulating water tank 42, the circulating water drum 43, and the circulating water pump 41 are arranged in sequence along the water flow direction of the circulation pipeline 40.

[0071] In this embodiment, the water-cooled wall structure 111 is composed of a plurality of water-cooling tubes distributed around the reaction chamber 11 .

[0072] In this embodiment, the reaction apparatus further includes a main gas outlet pipe 51, a first branch pipe 52, and a second branch pipe 53. The first pipe opening of the main gas outlet pipe 51 is connected to and communicates with the synthesis gas outlet of the second scrubbing assembly 30; the first pipe opening of the first branch pipe 52 and the first pipe opening of the second branch pipe 53 are both connected to and communicate with the second pipe opening of the main gas outlet pipe 51; the first branch pipe 52 and the second branch pipe 53 are arranged in parallel; a fifth temperature detector 95 is arranged on the main gas outlet pipe 51. Both the first branch pipe 52 and the second branch pipe 53 are configured to be switchable; and a gas composition analyzer 96 is arranged on the first branch pipe 52.

[0073] Specifically, the second outlet of the first branch line 52 is connected to and communicates with the syngas inlet of the syngas shift converter, allowing the syngas within the first branch line 52 to be converted. The first branch line 52 is connected, and the second branch line 53 is disconnected, allowing the syngas flowing from the syngas outlet of the second scrubbing module 30 to flow into the first branch line 52 and then into the syngas shift converter. When the gas pressure within the first branch line 52 is high, the second branch line 53 can be switched to a connected state, allowing a portion of the syngas flowing from the syngas outlet of the second scrubbing module 30 to flow into the first branch line 52 and the remaining portion to flow into the second branch line 53. The second outlet of the second branch line 53 is connected to the flare, allowing the raw syngas flowing from the second branch line 53 to flow to the flare.

[0074] Specifically, the first branch pipeline 52 is provided with a first control valve 521 to control the on / off state of the first branch pipeline 52. The second branch pipeline 53 is provided with a second control valve 531 to control the on / off state of the second branch pipeline 53.

[0075] During specific implementation, pulverized coal passes through pulverized coal pipeline 61 and then enters reaction chamber 11 through the main burner. Under the high temperature and high pressure conditions in reaction chamber 11, the pulverized coal undergoes a complex reaction, producing synthesis gas rich in hydrogen and carbon monoxide. The hot synthesis gas and liquid slag leave reaction chamber 11 and flow downward through downcomer 13 to quench chamber 12. In downcomer 13, the synthesis gas is cooled by quenching water injected from the outside, while the liquid slag cools to solid slag at the bottom of quench chamber 12. After preliminary scrubbing and cooling, the synthesis gas passes through a Venturi scrubbing system for further dust removal before being delivered to downstream equipment.

[0076] The furnace temperature control method of the present invention comprises:

[0077] The temperature T1 of the cooling water flowing into the water-cooled wall structure 111 is obtained; that is, the detected temperature T1 of the first temperature detecting element 91 is obtained; T1 is also the cooling water inlet temperature.

[0078] Obtain the temperature T2 of the cooling water flowing out of the water-cooled wall structure 111; that is, obtain the detection temperature T2 of the second temperature detection component 92; T2 is also the cooling water outlet temperature; based on T1 and T2, obtain the temperature difference T2-T1 between the inlet and outlet cooling water, that is, the cooling water inlet and outlet temperature difference.

[0079] The temperature T3 of the synthesis gas flowing out of the quenching chamber 12 is obtained; that is, the temperature T3 detected by the third temperature detecting member 93 is obtained; T3 is also the temperature of the synthesis gas outlet of the quenching chamber 12.

[0080] The temperature T4 of the syngas flowing out of the first scrubbing assembly 20 is obtained; that is, the temperature T4 detected by the fourth temperature detecting element 94 is obtained. Specifically, T4 is the temperature of the syngas flowing out of the gas-liquid separator 22, that is, the temperature at the syngas outlet at the top of the gas-liquid separator 22. The temperature difference T3-T4 of the syngas is calculated based on T3 and T4.

[0081] The temperature T5 of the synthesis gas flowing out of the second washing assembly 30 is obtained; that is, the temperature T5 detected by the fifth temperature detection member 95 is obtained; that is, T5 is the temperature of the synthesis gas flowing out of the washing tower 32, that is, the temperature at the synthesis gas outlet of the washing tower 32.

[0082] Obtain the composition of the synthesis gas flowing out of the second scrubbing assembly 30; that is, obtain the composition of the synthesis gas detected by the gas composition analyzer 96; that is, obtain the composition of the synthesis gas flowing out of the scrubbing tower 32; to obtain the methane content, carbon dioxide content, and carbon monoxide hydrogen content in the synthesis gas flowing out of the second scrubbing assembly 30.

[0083] Whether the furnace temperature of the reaction chamber 11 is appropriate is determined based on the temperature difference T2-T1, T3 of the inlet and outlet cooling water, the temperature difference T3-T4, T5 of the synthesis gas, the methane content in the synthesis gas flowing out of the second washing assembly 30, the carbon dioxide content in the synthesis gas flowing out of the second washing assembly 30, and the carbon monoxide hydrogen content in the synthesis gas flowing out of the second washing assembly 30; wherein the internal temperature of the reaction chamber 11 is the furnace temperature.

[0084] The furnace temperature control method of the present application characterizes the furnace temperature of the reaction chamber 11 by the temperature difference T2-T1, T3 of the inlet and outlet cooling water, the temperature difference T3-T4, T5 of the synthesis gas, the methane content in the synthesis gas, the carbon dioxide content in the synthesis gas, and the carbon monoxide hydrogen content in the synthesis gas, and monitors the reaction device as a whole, thereby facilitating more effective monitoring of the furnace temperature of the reaction chamber 11, so as to control the furnace temperature of the reaction chamber 11 at an appropriate temperature, avoid the furnace temperature of the reaction chamber 11 being too high or too low, thereby achieving a higher effective gas yield, and improving the effective gas yield. It can be seen that the furnace temperature control method of the present application solves the problem in the prior art that the monitoring method of the gasifier easily causes the furnace temperature of the gasifier to be too high or too low, thereby affecting the effective gas yield.

[0085] In this embodiment, the furnace temperature control method includes: under normal operating conditions, when the oxygen-coal ratio of the gasifier 10 is in the range of 0.400 to 0.420, and when the temperature difference T2-T1 of the inlet and outlet cooling water is in the range of 7°C to 10°C, and when the value range of T3 is 218°C to 222°C, and when the temperature difference T3-T4 of the synthesis gas is in the range of 3°C to 4°C, and when the value range of T5 is 208°C to 212°C, and when the methane content in the synthesis gas flowing out of the second washing component 30 is in the range of 0.015% to 0.030%, and when the carbon dioxide content in the synthesis gas flowing out of the second washing component 30 is in the range of 5.0% to 7.0%, and when the content of carbon monoxide and hydrogen gas in the synthesis gas flowing out of the second washing component 30 is in the range of 90% to 92%, it is determined that the furnace temperature of the reaction chamber 11 is appropriate.

[0086] That is, when the oxygen-coal ratio of the gasifier 10 is in the range of 0.400 to 0.420, and when the temperature difference T2-T1 of the inlet and outlet cooling water is in the range of 7°C to 10°C, and when T3 is in the range of 218°C to 222°C, and when the temperature difference T3-T4 of the synthesis gas is in the range of 3°C to 4°C, and when T5 is in the range of 208°C to 212°C, and when the methane content in the synthesis gas flowing out of the second washing component 30 is in the range of 0.015% to 0.030%, and when the carbon dioxide content in the synthesis gas flowing out of the second washing component 30 is in the range of 5.0% to 7.0%, and when the content of carbon monoxide and hydrogen gas in the synthesis gas flowing out of the second washing component 30 is in the range of 90% to 92%, it is determined that the furnace temperature of the reaction chamber 11 is appropriate; at this time, the effective gas yield is the highest, and the carbon conversion rate and cold coal gas efficiency are high.

[0087] It should be noted that high cold gas efficiency means that the proportion of carbon monoxide and hydrogen in the synthesis gas is high.

[0088] It should be noted that when pulverized coal is completely burned, carbon dioxide is produced. The oxygen consumption required for complete combustion is the complete combustion oxygen consumption. When pulverized coal is incompletely burned, carbon monoxide and hydrogen are produced. The oxygen-to-coal ratio refers to the ratio of the current set oxygen level (i.e., the oxygen consumption for incomplete combustion of the current pulverized coal flow rate) to the oxygen consumption for complete combustion of the current pulverized coal flow rate.

[0089] In this embodiment, the first condition is that the temperature difference T2-T1 between the inlet and outlet cooling water is greater than 10°C, the second condition is that the value range of T3 is greater than 222°C, the third condition is that the value range of T5 is greater than 212°C, the fourth condition is that the methane content in the synthesis gas flowing out of the second washing component 30 is less than 0.015%, and the fifth condition is that the carbon dioxide content in the synthesis gas flowing out of the second washing component 30 is greater than 7.0%; when at least three of the first condition, the second condition, the third condition, the fourth condition and the fifth condition are met, it is determined that the furnace temperature of the reaction chamber 11 is too high.

[0090] Optionally, when T2-T1, T3, T5, and the carbon dioxide content all exceed the upper limit, and the methane content exceeds the lower limit, it indicates that the furnace temperature of the reaction chamber 11 is too high.

[0091] In this embodiment, the furnace temperature control method includes: when it is determined that the furnace temperature of the reaction chamber 11 is too high, slightly reducing the oxygen-coal ratio by 0.005 at a time. Specifically, when [(T2-T1)-10]≤4°C, the upper limit of the oxygen-coal ratio adjustment is [(T2-T1)-10]*0.005; when [(T2-T1)-10]>4°C, the upper limit of the oxygen-coal ratio adjustment is [(T2-T1)-10] / 2*0.005, that is, the upper limit of the oxygen-coal ratio adjustment is [(T2-T1)-10]*0.5*0.005; and when [(T2-T1)-10]≥25°C, the gasifier 10 is tripped, i.e., the gasifier 10 is shut down.

[0092] Optionally, when it is determined that the furnace temperature of the reaction chamber 11 is too high, the oxygen-coal ratio is adjusted every 10 minutes.

[0093] In this embodiment, the sixth condition is that the temperature difference T2-T1 between the inlet and outlet cooling water is in the range of less than 7°C, the seventh condition is that the value range of T3 is less than 218°C, the eighth condition is that the value range of T5 is less than 208°C, the ninth condition is that the methane content in the synthesis gas flowing out of the second washing component 30 is greater than 0.030%, and the tenth condition is that the carbon dioxide content in the synthesis gas flowing out of the second washing component 30 is less than 5.0%; when at least three of the sixth condition, the seventh condition, the eighth condition, the ninth condition and the tenth condition are met, it is determined that the furnace temperature of the reaction chamber 11 is low.

[0094] Optionally, when T2-T1, T3, T5, and the carbon dioxide content all exceed the lower limit, and the methane content exceeds the upper limit, it indicates that the furnace temperature of the reaction chamber 11 is too low.

[0095] In this embodiment, the furnace temperature control method includes: when it is determined that the temperature of the reaction chamber 11 is too low, slightly increasing the oxygen-to-coal ratio by 0.005 increments. Specifically, when [7-(T2-T1)] ≤ 2°C, the upper limit of the oxygen-to-coal ratio adjustment is [7-(T2-T1)]*0.005; when [7-(T2-T1)] > 2°C, the upper limit of the oxygen-to-coal ratio adjustment is [7-(T2-T1)] / 2*0.005, i.e., the upper limit of the oxygen-to-coal ratio adjustment is [7-(T2-T1)]*0.5*0.005.

[0096] Optionally, when it is determined that the furnace temperature of the reaction chamber 11 is too low, the oxygen-coal ratio is adjusted every 10 minutes.

[0097] During implementation, a first temperature detector 91 and a second temperature detector 92 are installed at the cooling water inlet and outlet of the water-cooled wall structure 111 of the reaction chamber 11, respectively, to measure the cooling water inlet and outlet temperature difference T2-T1. A third temperature detector 93 is installed at the syngas outlet of the quench chamber 12; a fourth temperature detector 94 is installed at the syngas outlet at the top of the gas-liquid separator 22; and a fifth temperature detector 95 is installed at the syngas outlet of the scrubber 32. These three temperature detectors monitor the syngas temperature. A gas composition analyzer 96 is installed in the second branch line 53 to monitor the proportions of various components in the syngas.

[0098] In this embodiment, sub-high pressure steam is introduced into the reaction chamber 11 , and the sub-high pressure steam acts as a reaction medium to participate in the coal gasification reaction. At the same time, under the action of the sub-high pressure steam, the flame length in the reaction chamber 11 can be lengthened.

[0099] Specifically, sub-high pressure steam is introduced into the reaction chamber 11 through the steam pipeline 62 .

[0100] Specifically, oxygen is also introduced into the reaction chamber 11 through the steam line 62 .

[0101] In this embodiment, the furnace temperature control method further includes: when the coal feed rate of the gasifier 10 is less than 80%, the amount of sub-high-pressure steam added to the reaction chamber 11 is 2000 kg / h, that is, the amount of sub-high-pressure steam added per hour is 2000 kg. When the coal feed rate of the gasifier 10 is greater than 80%, the amount of sub-high-pressure steam added to the reaction chamber 11 is [2000-30*Q] kg / h, that is, the amount of sub-high-pressure steam added per hour is [2000-30*Q] kg; wherein Q is the hourly increase in the coal feed rate of the gasifier 10, measured in t / h (i.e., tons / hour). It should be noted that 80% means that the current coal feed rate is 80% of the coal feed rate when the gasifier 10 is operating at full load.

[0102] It should be noted that the coal feed rate of the gasifier 10 refers to the amount of dry pulverized coal entering the gasifier 10; the unit is t / h. A low coal feed rate results in a short and coarse flame, and T2 is high. Sub-high-pressure steam must be added to lengthen the flame to prevent damage to the water-cooled wall structure 111. A high coal feed rate results in a long flame, and the sub-high-pressure steam must be reduced accordingly, otherwise T2 will be low.

[0103] The present invention also provides a reaction device, which is suitable for the above-mentioned furnace temperature control method.

[0104] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0105] In the furnace temperature control method provided by the present invention, it is applicable to a reaction device, the reaction device includes a gasifier 10, the gasifier 10 includes a reaction chamber 11 and a quenching chamber 12, the inner wall of the reaction chamber 11 is set as a water-cooled wall structure 111; the reaction device also includes a first washing assembly 20 and a second washing assembly 30, the gasifier 10, the first washing assembly 20 and the second washing assembly 30 are connected and communicated in sequence, so that the synthesis gas flowing out of the quenching chamber 12 flows through the first washing assembly 20 and the second washing assembly 30 in sequence; the furnace temperature control method includes: obtaining the temperature T1 of the cooling water introduced into the water-cooled wall structure 111; obtaining Take the temperature T2 of the cooling water flowing out of the water-cooled wall structure 111; obtain the temperature T3 of the synthesis gas flowing out of the quenching chamber 12; obtain the temperature T4 of the synthesis gas flowing out of the first washing component 20; obtain the temperature T5 of the synthesis gas flowing out of the second washing component 30; obtain the components of the synthesis gas flowing out of the second washing component 30 to obtain the methane content, carbon dioxide content, and carbon monoxide hydrogen content in the synthesis gas; based on T2-T1, T3, T3-T4, T5, methane content, carbon dioxide content, and carbon monoxide hydrogen content, determine whether the furnace temperature of the reaction chamber 11 is appropriate.

[0106] The furnace temperature control method of the present application characterizes the furnace temperature of the reaction chamber 11 by the temperature difference T2-T1, T3 of the inlet and outlet cooling water, the temperature difference T3-T4, T5 of the synthesis gas, the methane content in the synthesis gas, the carbon dioxide content in the synthesis gas, and the carbon monoxide hydrogen content in the synthesis gas, and monitors the reaction device as a whole, thereby facilitating more effective monitoring of the furnace temperature of the reaction chamber 11, so as to control the furnace temperature of the reaction chamber 11 at an appropriate temperature, avoid the furnace temperature of the reaction chamber 11 being too high or too low, thereby achieving a higher effective gas yield, and improving the effective gas yield. It can be seen that the furnace temperature control method of the present application solves the problem in the prior art that the monitoring method of the gasifier easily causes the furnace temperature of the gasifier to be too high or too low, thereby affecting the effective gas yield.

[0107] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0108] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0109] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A furnace temperature control method, the furnace temperature control method being applicable to a reaction device, the reaction device comprising a gasification furnace (10), the gasification furnace (10) comprising a reaction chamber (11) and a quenching chamber (12), the inner wall of the reaction chamber (11) being configured as a water-cooled wall structure (111); characterized in that: The reaction device further comprises a first washing assembly (20) and a second washing assembly (30); the gasifier (10), the first washing assembly (20) and the second washing assembly (30) are sequentially connected and communicated, so that the synthesis gas flowing out of the quenching chamber (12) flows through the first washing assembly (20) and the second washing assembly (30) in sequence; the furnace temperature control method comprises: Obtaining the temperature T1 of the cooling water flowing into the water-cooled wall structure (111); Obtaining the temperature T2 of the cooling water flowing out of the water-cooled wall structure (111); Obtaining a temperature T3 of the synthesis gas flowing out of the quenching chamber (12); Obtaining a temperature T4 of the synthesis gas flowing out of the first scrubbing assembly (20); Obtaining a temperature T5 of the synthesis gas flowing out of the second scrubbing assembly (30); Obtaining the components of the synthesis gas flowing out of the second scrubbing assembly (30) to obtain the methane content, carbon dioxide content, and carbon monoxide hydrogen content in the synthesis gas; Judging whether the furnace temperature of the reaction chamber (11) is appropriate based on T2-T1, T3, T3-T4, T5, the methane content, the carbon dioxide content, and the carbon monoxide and hydrogen content; When the oxygen-coal ratio of the gasifier (10) is in the range of 0.400 to 0.420, and when the value range of T2-T1 is 7°C to 10°C, and when the value range of T3 is 218°C to 222°C, and when the value range of T3-T4 is 3°C to 4°C, and when the value range of T5 is 208°C to 212°C, and when the value range of the methane content is 0.015% to 0.030%, and when the value range of the carbon dioxide content is 5.0% to 7.0%, and when the value range of the carbon monoxide and hydrogen content is 90% to 92%, it is determined that the furnace temperature of the reaction chamber (11) is appropriate; The first condition is that the value range of T2-T1 is greater than 10°C, the second condition is that the value range of T3 is greater than 222°C, the third condition is that the value range of T5 is greater than 212°C, the fourth condition is that the methane content is less than 0.015%, and the fifth condition is that the carbon dioxide content is greater than 7.0%. When at least three of the first condition, the second condition, the third condition, the fourth condition, and the fifth condition are met, it is determined that the furnace temperature of the reaction chamber (11) is too high. The sixth condition is that the value range of T2-T1 is less than 7°C, the seventh condition is that the value range of T3 is less than 218°C, the eighth condition is that the value range of T5 is less than 208°C, the ninth condition is that the methane content is greater than 0.030%, and the tenth condition is that the carbon dioxide content is less than 5.0%. When at least three of the sixth condition, the seventh condition, the eighth condition, the ninth condition, and the tenth condition are met, it is determined that the furnace temperature of the reaction chamber (11) is too low. When it is determined that the furnace temperature of the reaction chamber (11) is too high, the furnace temperature control method includes: reducing the oxygen-coal ratio by an adjustment range of 0.005 each time; wherein, when [(T2-T1)-10]≤4°C, the upper limit of the adjustment of the oxygen-coal ratio is [(T2-T1)-10]*0.005; when [(T2-T1)-10]>4°C, the upper limit of the adjustment of the oxygen-coal ratio is [(T2-T1)-10] / 2*0.005; when [(T2-T1)-10]≥25°C, the gasifier (10) is tripped; When it is determined that the furnace temperature of the reaction chamber (11) is too low, the furnace temperature control method includes: increasing the oxygen-coal ratio by an adjustment range of 0.005 each time; wherein, when [7-(T2-T1)]≤2°C, the upper limit of the adjustment of the oxygen-coal ratio is [7-(T2-T1)]*0.005; when [7-(T2-T1)]>2°C, the upper limit of the adjustment of the oxygen-coal ratio is [7-(T2-T1)] / 2*0.

005.

2. The furnace temperature control method according to claim 1, characterized in that: The furnace temperature control method comprises: When the coal feeding amount of the gasifier (10) is less than 80%, the amount of sub-high pressure steam added to the reaction chamber (11) is 2000 kg / h; When the coal feeding amount of the gasifier (10) is higher than 80%, the amount of sub-high pressure steam added to the reaction chamber (11) is [2000-30*Q] kg / h; Q is the coal feeding amount of the gasifier (10) increased per hour.

3. A reaction device suitable for the furnace temperature control method according to claim 1 or 2, characterized in that: The reaction device comprises: a first temperature detecting element (91), the first temperature detecting element (91) being used to detect the temperature of cooling water flowing into the water-cooled wall structure (111); a second temperature detecting element (92), the second temperature detecting element (92) being used to detect the temperature of cooling water flowing out of the water-cooled wall structure (111); a third temperature detection element (93), the third temperature detection element (93) being used to detect the temperature of the synthesis gas flowing out of the quenching chamber (12); a fourth temperature detecting element (94), the fourth temperature detecting element (94) being used to detect the temperature of the synthesis gas flowing out of the first scrubbing assembly (20); a fifth temperature detecting element (95), the fifth temperature detecting element (95) being used to detect the temperature of the synthesis gas flowing out of the second scrubbing assembly (30); A gas composition analyzer (96) is used to analyze the composition of the synthesis gas flowing out of the second scrubbing assembly (30).

4. The reaction device according to claim 3, characterized in that The first scrubbing assembly (20) includes a first scrubber (21) and a gas-liquid separation tank (22), and the gasifier (10), the first scrubber (21), the gas-liquid separation tank (22), and the second scrubbing assembly (30) are sequentially connected and communicated so that the synthesis gas flowing out of the quenching chamber (12) flows through the first scrubber (21), the gas-liquid separation tank (22), and the second scrubbing assembly (30) in sequence.

5. The reaction device according to claim 3, characterized in that The second scrubbing assembly (30) includes a second scrubber (31) and a scrubbing tower (32), and the gasifier (10), the first scrubbing assembly (20), the second scrubber (31) and the scrubbing tower (32) are sequentially connected and communicated so that the synthesis gas flowing out of the quenching chamber (12) flows through the first scrubbing assembly (20), the second scrubber (31) and the scrubbing tower (32) in sequence.

6. The reaction device according to claim 3, characterized in that The reaction device further comprises a circulation pipeline (40), a circulation water pump (41) and a refrigeration component, wherein the circulation water pump (41) and the refrigeration component are both arranged on the circulation pipeline (40); the two ends of the circulation pipeline (40) are respectively connected to and communicated with the water inlet and the water outlet of the water-cooled wall structure (111); the first temperature detection component (91) is arranged on the pipe section at the water inlet of the water-cooled wall structure (111), and the second temperature detection component (92) is arranged on the pipe section at the water outlet of the water-cooled wall structure (111).

7. The reaction device according to claim 3, characterized in that The reaction device further comprises a main gas outlet pipe (51), a first branch pipe (52) and a second branch pipe (53); the first pipe opening of the main gas outlet pipe (51) is connected to and communicates with the synthesis gas outlet of the second washing assembly (30); the first pipe opening of the first branch pipe (52) and the first pipe opening of the second branch pipe (53) are both connected to and communicate with the second pipe opening of the main gas outlet pipe (51); The fifth temperature detection element (95) is arranged on the main gas outlet pipe (51); the first branch pipeline (52) and the second branch pipeline (53) can both be set to be on and off; and the gas component analyzer (96) is arranged on the first branch pipeline (52).

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