Gasification furnace long-lasting light fuel gas treatment device

Abstract

The utility model belongs to the long lasting light fuel processing technical field discloses a gasification furnace long lasting light fuel gas treatment device, including water gas treatment device, compressor and fuel gas delivery pipeline, water gas treatment device is connected with gasification furnace to purify water gas generated by gasification furnace as fuel gas, fuel gas includes hydrogen, compressor is connected with water gas treatment device, the long lasting light of compressor is connected gasification furnace through fuel gas delivery pipeline. The utility model discloses a water gas treatment device can handle water gas as the fuel gas containing hydrogen mainly, this fuel gas does not contain carbon monoxide and hydrogen sulfide and other gases with flammable and explosive, virulent characteristics, therefore significantly reduced the corrosion of gas to equipment and pipeline, has alleviated the security risk of the corrosion of pipeline and equipment and has caused, thereby has promoted the reliability of device operation.

Description

Technical Field

[0001] This utility model belongs to the field of fuel treatment technology for continuous lamps, and specifically relates to a fuel gas treatment device for continuous lamps in a gasifier. Background Technology

[0002] In existing technologies, the fuel gas for the continuous lamp in the gasifier of the ammonia synthesis system is water gas generated in the gasifier. After condensation and cooling to recover heat, it is pressurized to 4.8 MPa by a reciprocating water gas compressor and then returned to the gasifier for use by the continuous lamp. However, due to the complex composition of water gas, which contains flammable, explosive, and highly toxic substances such as H2S and CO, and the extremely corrosive nature of hydrogen sulfide to equipment and pipelines at low temperatures, water gas is highly susceptible to corrosion of equipment and pipelines during the compressor pressurization process, significantly increasing the risks associated with compression and transportation. In actual field operation, corrosion and perforation frequently occur in the compressor's inlet and outlet pipelines, flanges, valves, and the equipment itself, leading to multiple emergency shutdowns due to sudden increases in leakage.

[0003] Therefore, the pressurization of water gas by the compressor poses a significant safety risk to on-site inspection personnel and system operation. Switching to liquefied petroleum gas (LPG) as fuel for the continuously lit lamps would significantly increase production costs. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a fuel gas treatment device for the gasifier's continuous lamp, so as to solve the problem that the use of water gas as fuel gas in the existing gasifier's continuous lamp leads to easy corrosion and perforation of the compressor and pipeline accessories.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A fuel gas treatment device for a gasifier's continuous light includes a water gas treatment device, a compressor, and a fuel gas delivery pipeline. The water gas treatment device is connected to the gasifier to purify the water gas produced by the gasifier into fuel gas, which includes hydrogen. The compressor is connected to the water gas treatment device and is connected to the gasifier's continuous light via the fuel gas delivery pipeline.

[0006] In one possible implementation, the water gas treatment device includes a gas treatment device for a synthetic ammonia preparation system. The compressor has an output port one and an output port two. The output port one is connected to a continuous lamp through a fuel gas delivery pipeline, and the output port two is connected to the liquid ammonia synthesis system of the synthetic ammonia preparation system.

[0007] In a possible implementation, the water gas treatment device includes a conversion device and a purification device connected in sequence. The conversion device is used to convert carbon monoxide in the water gas into hydrogen, and the purification device is used to remove at least hydrogen sulfide and carbon monoxide from the water gas.

[0008] In a possible implementation, the purification device includes a cryogenic methane scrubbing device and a liquid nitrogen scrubbing device, wherein the cryogenic methane scrubbing device removes carbon dioxide and hydrogen sulfide from the water gas, and the liquid nitrogen scrubbing device is used to remove carbon monoxide and methane from the water gas.

[0009] In one possible implementation, the fuel gas also includes a protective gas, and the input end of the compressor is connected to a protective gas delivery pipeline.

[0010] In one possible implementation, the fuel gas delivery pipeline includes a pressure regulating valve, a pressure gauge, and a shut-off valve, which are connected in series to a continuous light via a pipeline.

[0011] In a possible implementation, both the pressure regulating valve and the shut-off valve are electrically controlled valves, and the electrically controlled valves are connected to a controller.

[0012] In one possible implementation, the compressor is a syngas compressor.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The gasifier's continuous lamp fuel gas treatment device of this utility model can process water gas into fuel gas mainly containing hydrogen by using a water gas treatment device. This fuel gas does not contain carbon monoxide and hydrogen sulfide, which are flammable, explosive, and highly toxic gases. Therefore, it significantly reduces the corrosion of equipment and pipelines by the gas, reduces the safety risks caused by pipeline and equipment corrosion, and thus improves the reliability of the device operation.

[0014] Moreover, by using refined gas obtained from the gas processing device of the ammonia synthesis system instead of water gas as fuel gas for gasification lamps, the operation is more convenient, safer, and more stable in pressure. It is also more conducive to load regulation of the fuel gas for gasification lamps, and its operating performance is better than that of the compressor, resulting in significant energy savings.

[0015] Meanwhile, using purified gas, primarily hydrogen, as fuel for the gasifier's continuous lamp is cheaper and easier to operate compared to using liquefied petroleum gas. Attached Figure Description

[0016] Figure 1 A schematic diagram illustrating the structural principle of a fuel gas treatment device for a gasifier's continuous lamp; Figure 2 This is a schematic diagram of the gas treatment section of a gasifier fuel gas treatment device combined with a synthetic ammonia preparation system. Figure 3 This is a schematic diagram of the fuel gas delivery pipeline of a fuel gas treatment device for a gasifier's continuous lamp.

[0017] In the diagram: 1-Gasifier; 2-Continuous lamp; 3-Shift converter; 31-Shift converter; 4-Purification device; 41-Low-temperature methane scrubbing device; 42-Liquid nitrogen scrubbing device; 5-Protective gas delivery pipeline; 6-Compressor; 61-Synthesis gas compressor; 7-Product liquid ammonia; 8-Fuel gas delivery pipeline; 81-Pressure regulating valve; 82-Shut-off valve; 83-Controller; 84-Pressure gauge. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to specific embodiments.

[0019] Please refer to Figure 1-3 As shown, an embodiment of this application provides a fuel gas treatment device for a gasifier's continuous lamp, including a water gas treatment device, a compressor 6, and a fuel gas delivery pipeline 8. The water gas treatment device is connected to the gasifier 1 to purify the water gas produced by the gasifier 1 into fuel gas, which includes hydrogen. The compressor 6 is connected to the water gas treatment device and is connected to the continuous lamp 2 of the gasifier 1 through the fuel gas delivery pipeline 8.

[0020] The continuous lamp 2 in the gasifier 1 uses water gas produced by the gasifier 1 as fuel gas. However, due to the complex composition of water gas, media such as H2S and CO are flammable, explosive, and highly toxic. In addition, hydrogen sulfide is extremely corrosive to equipment and pipelines at low temperatures. Water gas is very likely to cause corrosion of equipment and pipelines during the pressurization process of compressor 6. Therefore, a water gas treatment device is adopted. This device can process water gas into fuel gas mainly containing hydrogen. This refined gas is used as fuel gas for the continuous lamp 2. After being pressurized by compressor 6, it can be returned to gasifier 1 for use as fuel gas for the continuous lamp 2. This solves the corrosion and explosion problems of using water gas as fuel gas and avoids damage to compressor 6 and pipeline accessories.

[0021] Through the above technical solution, the water gas treatment device can process water gas into fuel gas mainly containing hydrogen. This fuel gas does not contain carbon monoxide or hydrogen sulfide, which are flammable, explosive, and highly toxic. Therefore, it significantly reduces the corrosion of equipment and pipelines by the gas, reduces the safety risks caused by pipeline and equipment corrosion, and thus improves the reliability of the device operation.

[0022] In one embodiment, the water gas treatment device includes a gas treatment device for a synthetic ammonia preparation system. The compressor 6 is provided with an output port one and an output port two. The output port one is connected to the continuous lamp 2 through the fuel gas delivery pipeline 8, and the output port two is connected to the liquid ammonia synthesis system of the synthetic ammonia preparation system.

[0023] In this way, the gas treatment device of the existing ammonia synthesis system can be used to treat water gas, avoiding the need to configure a separate treatment device, reducing costs. Furthermore, the gas treatment device can remove corrosive and explosive gaseous substances from the water gas to obtain refined gas that can be used as fuel gas. By improving the configuration of compressor 6 to have two output ports, namely output port one and output port two, a small stream of refined gas from output port one can flow to the lamp 2 for use as fuel gas, while the remaining refined gas is sent to the next stage of the ammonia synthesis system for synthesis to obtain the product liquid ammonia 7.

[0024] Based on this, the water gas treatment device corresponds to the gas treatment device or treatment section of the ammonia synthesis system, including a conversion device 3 and a purification device 4 connected in sequence. The conversion device 3 is used to convert carbon monoxide in the water gas into hydrogen, and the purification device 4 is used to remove at least hydrogen sulfide and carbon monoxide from the water gas.

[0025] The conversion device 3 is a conversion section, and the purification device 4 corresponds to the purification section. The conversion section mainly converts carbon monoxide in water gas into hydrogen through the conversion furnace 31, while the purification section mainly removes gaseous substances such as hydrogen sulfide from the water gas, finally obtaining a refined gas mainly containing hydrogen. This refined gas can be used as fuel gas for the continuous lamp 2.

[0026] In specific implementation, the purification device 4 includes a low-temperature methane scrubbing device 41 and a liquid nitrogen scrubbing device 42. The low-temperature methane scrubbing device 41 removes carbon dioxide and hydrogen sulfide from the water gas, while the liquid nitrogen scrubbing device 42 removes carbon monoxide and methane from the water gas. The low-temperature methane scrubbing device 41 corresponds to the low-temperature methane scrubbing section, which cools the water gas to -40°C using low-temperature methanol. This physical cooling method condenses the target gas, achieving the removal purpose. The liquid nitrogen scrubbing device 42 also corresponds to the liquid nitrogen scrubbing section, which also removes carbon monoxide and methane from the water gas through physical cooling.

[0027] In other embodiments, the water gas treatment device may be a separately configured treatment device, which performs conversion and treatment by setting up a conversion device 3 and a purification device 4 to obtain a refined gas mainly containing hydrogen.

[0028] To reduce the flammability risk of the fuel gas during transportation, the fuel gas also includes a protective gas, and the input end of the compressor 6 is connected to a protective gas delivery pipeline 5. By configuring a protective gas, the problems of hydrogen's susceptibility to explosion and combustion can be avoided, improving the safety of the pipeline during transportation.

[0029] In a preferred embodiment of the fuel gas delivery pipeline 8, the fuel gas delivery pipeline 8 includes a pressure regulating valve 81, a pressure gauge 84, and a shut-off valve 82, which are connected in series to the continuous light 2 via a pipeline.

[0030] The pressure regulating valve 81 can reduce the pressure of the gas separated by the compressor 6 to 4.8 MPa before it is delivered to the fuel gas pipeline of the gasifier 1's continuous lamp 2. At the same time, safety accessories such as the pressure regulating valve 81, pressure gauge 84, and shut-off valve 82 are installed on the fuel gas delivery pipeline 8, which facilitates effective management of fuel gas delivery and reduces the occurrence of safety risks.

[0031] Specifically, both the pressure regulating valve 81 and the shut-off valve 82 are electrically controlled valves, and each electrically controlled valve is connected to a controller 83. The controller 83 can be a PLC controller, which enables remote control of the pressure regulating valve 81 and the shut-off valve 82, thereby improving the convenience and timeliness of control.

[0032] Preferably, the compressor 6 is a synthesis gas compressor 61.

[0033] In summary, the gasification furnace continuous lamp fuel gas treatment device according to the embodiments of this application has the following technical effects: 1. By using a water gas treatment device, water gas can be processed into fuel gas mainly containing hydrogen. This fuel gas does not contain carbon monoxide or hydrogen sulfide, which are flammable, explosive, and highly toxic. Therefore, it significantly reduces the corrosion of equipment and pipelines by the gas, reduces the safety risks caused by pipeline and equipment corrosion, and thus improves the reliability of the device operation.

[0034] 2. By using the refined gas obtained from the gas treatment device of the ammonia synthesis preparation system instead of water gas as the fuel gas for the gasification lamp 2, the operation is more convenient, the safety is higher, the pressure stability is better, and it is more conducive to the load regulation of the fuel gas for the gasification lamp 2. The operating performance is better than that of the compressor 6, and the energy saving effect is significant.

[0035] 3. Using purified gas, mainly hydrogen, as fuel for the gasifier 1 and the lamp 2 is cheaper and easier to operate compared to using liquefied petroleum gas.

[0036] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be considered as limitations on this utility model, and the scope of protection of this utility model should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A fuel gas treatment device for a gasifier's continuous-burn lamp, characterized in that, It includes a water gas treatment device, a compressor (6) and a fuel gas delivery pipeline (8). The water gas treatment device is connected to the gasifier (1) to purify the water gas produced by the gasifier (1) into fuel gas. The fuel gas includes hydrogen. The compressor (6) is connected to the water gas treatment device. The compressor (6) is connected to the gasifier (1)’s constant light (2) through the fuel gas delivery pipeline (8).

2. The gasifier fuel gas treatment device for a gasifier continuous lamp as described in claim 1, characterized in that, The water gas treatment device includes a gas treatment device for the ammonia synthesis system. The compressor (6) is provided with an output port one and an output port two. The output port one is connected to the continuous lamp (2) through the fuel gas transmission pipeline (8), and the output port two is connected to the liquid ammonia synthesis system of the ammonia synthesis system.

3. A gasifier continuous lamp fuel gas treatment device as described in claim 1 or 2, characterized in that, The water gas treatment device includes a conversion device (3) and a purification device (4) connected in sequence. The conversion device (3) is used to convert carbon monoxide in the water gas into hydrogen gas, and the purification device (4) is used to remove at least hydrogen sulfide and carbon monoxide from the water gas.

4. The gasifier fuel gas treatment device for a gasifier continuous lamp as described in claim 3, characterized in that, The purification device (4) includes a low-temperature methane scrubbing device (41) and a liquid nitrogen scrubbing device (42). The low-temperature methane scrubbing device (41) removes carbon dioxide and hydrogen sulfide from the water gas, and the liquid nitrogen scrubbing device (42) removes carbon monoxide and methane from the water gas.

5. The gasifier fuel gas treatment device for a gasifier continuous lamp as described in claim 1, characterized in that, The fuel gas also includes a protective gas, and the input end of the compressor (6) is connected to a protective gas delivery pipeline (5).

6. The gasifier fuel gas treatment device for a gasifier continuous lamp as described in claim 1, characterized in that, The fuel gas delivery pipeline (8) includes a pressure regulating valve (81), a pressure gauge (84), and a shut-off valve (82), which are connected in series to the night lamp (2) via pipelines.

7. The gasifier fuel gas treatment device for a gasifier continuous lamp as described in claim 6, characterized in that, Both the pressure regulating valve (81) and the shut-off valve (82) are electrically controlled valves, and the electrically controlled valves are connected to a controller (83).

8. The gasifier fuel gas treatment device for a gasifier continuous lamp as described in claim 1, characterized in that, The compressor (6) is a synthesis gas compressor (61).

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