Coal gas pretreatment system of coal gasifier
By installing a gas output pipeline and a gas mixer inside the coal bunker, the tar gas inside the bunker is extracted and mixed with air, solving the problems of pollution and safety hazards caused by direct gas emissions, and realizing the secondary utilization and safe operation of the gas.
Patent Information
- Application Number
- CN202520167746.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-24
AI Technical Summary
In the existing technology, the direct emission of tar gas during the solid coal gasification process in the coal bunker leads to air pollution and safety hazards, and fails to achieve the secondary utilization of the coal gas.
By installing a gas output pipeline on the coal bunker, the tar gas in the coal bunker is extracted and mixed with air through a gas mixer. The mixture is then sent into the coal gasification furnace for use as fuel. The system incorporates components such as induced draft fans and electrostatic precipitators to ensure safety and dust removal.
This effectively avoids air pollution caused by direct gas emissions, improves safety, and enables the secondary utilization of gas. The concentration of the mixed gas is controlled within a safe range, ensuring the safe operation of the gasification furnace.
Smart Images
Figure CN223738005U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The coal gas pretreatment system of a coal gasifier belongs to the technical field of coal gasifiers. BACKGROUND
[0002] The coal gasifier is a device for converting solid coal into combustible gas, and it is one of the core devices of the coal gasification process. In the prior art, the solid coal in the coal bunker is sent into the coal gasifier for gasification treatment. However, the solid coal in the coal bunker will form coal gas containing tar, and every time coal is added into the coal bunker, the coal gas therein will directly enter the air, not only causing air pollution, but also the coal gas containing tar is a combustible gas, and direct discharge also has certain safety hazards. CONTENT
[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, and to provide a coal gas pretreatment system of a coal gasifier, which can extract the coal gas containing tar in the coal bunker through a coal gas output pipeline, avoid the pollution of direct discharge of coal gas to the air, and realize the secondary use of coal gas as fuel gas.
[0004] The technical solution adopted by the present application to solve the technical problem is: the coal gas pretreatment system of the coal gasifier, comprising a coal bunker for conveying solid coal to the coal gasifier, characterized in that: a coal gas output pipeline is arranged on one side of the upper part of the coal bunker, the coal gas output pipeline is connected with the input end of a gas mixer, a gas input unit is connected with the other input end of the gas mixer, the output end of the gas mixer is connected with the inlet of an induced draft fan, and the outlet of the induced draft fan is connected with the coal gasifier.
[0005] Preferably, the gas input unit comprises an air input pipeline for conveying air to the gas mixer.
[0006] Preferably, the gas input unit further comprises a filter installed at the port of the air input pipeline.
[0007] Preferably, a pressure regulating valve is installed on the coal gas output pipeline.
[0008] Preferably, an electrostatic precipitator is further arranged, the output end of the gas mixer is connected with the input end of the electrostatic precipitator, and the output end of the electrostatic precipitator is connected with the induced draft fan.
[0009] Preferably, at least one coal feeding valve is arranged on the top of the coal bunker.
[0010] Preferably, a pressure transmitter is installed on the coal gas output pipeline.
[0011] Compared with the prior art, the coal gasification furnace coal gas pretreatment system has the beneficial effects that: in the coal gas pretreatment system of the coal gasification furnace, the coal gas containing tar in the coal bunker is extracted through the coal gas output pipeline, on the one hand, the pollution caused by direct discharge of the coal gas to the air is avoided, and on the other hand, the coal gas is sent into the coal gasification furnace as fuel for secondary use.
[0012] In the coal gas pretreatment system of the coal gasification furnace, the high-concentration coal gas sent into the coal gas output pipeline is mixed with a large amount of air through the gas mixer, so that the concentration of the coal gas in the mixed gas is lower than the explosion limit, and the safety is improved.
[0013] In the coal gas pretreatment system of the coal gasification furnace, the pressure in the coal gas output pipeline is monitored through the pressure transmitter, so that the negative pressure in the coal bunker is always maintained, so that the coal gas is smoothly discharged. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a coal gasification furnace coal gas pretreatment system structure diagram.
[0015] Among them: 1, coal valve 2, coal bunker 3, pressure transmitter 4, coal gas output pipeline 5, filter 6, pressure regulating valve 7, air input pipeline 8, gas mixer 9, electrostatic precipitator 10, induced draft fan. DETAILED DESCRIPTION
[0016] Figure 1 It is the best embodiment of the utility model, and the following will be combined with the attached Figure 1 The utility model is further described.
[0017] As Figure 1 shown, a coal gasification furnace coal gas pretreatment system (hereinafter referred to as pretreatment system) includes a coal bunker 2, a plurality of coal valves 1 are arranged on the top of the coal bunker 2, and solid coal is sent into the coal bunker 2 through the coal valve 1. The coal bunker 2 is connected with the subsequent coal gasification furnace (not shown in the drawing), the solid coal stored in the coal bunker 2 is sent into the coal gasification furnace, and the solid coal is generated into coal gas through the coal gasification furnace.
[0018] A coal gas output pipeline 4 is arranged on one side of the upper part of the coal bunker 2, one end of the coal gas output pipeline 4 is connected with one end of the pressure regulating valve 6, and a pressure transmitter 3 is further arranged on the coal gas output pipeline 4. The other end of the pressure regulating valve 6 is connected with one of the input ports of the gas mixer 8, the air input pipeline 7 is arranged at the other input port of the gas mixer 8, and the other end of the air input pipeline 7 is provided with a filter 5.
[0019] One end of the electrostatic precipitator 9 is connected with the output port of the gas mixer 8 through a pipeline, the outlet of the electrostatic precipitator 9 is connected with the inlet of the induced draft fan 10, and the outlet of the induced draft fan 10 is connected with the coal gasification furnace.
[0020] The specific working process and working principle are as follows: after the induced draft fan 10 is started, under the action of the suction force, a negative pressure is formed in the coal bunker 2, and the coal gas with a high tar content in the coal bunker 2 is extracted through the negative pressure, the coal gas is output from the coal bunker 2, enters the gas mixer 8 through the coal gas output pipeline 4, and at the same time, the external air is filtered through the filter 5 and enters the other end of the gas mixer 8. The pressure in the coal gas output pipeline 4 is monitored by the pressure transmitter 3 during the output of the coal gas, so that the speed of the induced draft fan 10 is adjusted by the controller, so that the coal gas in the coal bunker 2 can be extracted.
[0021] The high-concentration coal gas sent by the coal gas output pipeline 4 is mixed with a large amount of air in the gas mixer 8, so that the concentration of the coal gas in the mixed gas is lower than the explosion limit. After the mixed gas is output from the gas mixer 8, it enters the electrostatic precipitator 9 for dust removal, and after the dust removal is completed in the electrostatic precipitator 9, it is sent into the coal gasification furnace through the induced draft fan 10, and is used as fuel gas in the coal gasification furnace to realize recycling.
[0022] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to obtain equivalent embodiments. However, any simple modification, equivalent change and modification made on the basis of the technical essence of the present application without departing from the technical scheme of the present application still falls within the protection scope of the present application.
Claims
1. A coal gasification furnace coal gas pretreatment system comprising a coal bunker (2) for delivering solid coal to a coal gasification furnace, characterized in that: A gas output pipeline (4) is arranged on one side of the upper part of the coal bunker (2), and the gas output pipeline (4) is connected with the input end of the gas mixer (8). A gas input unit is connected with the other input end of the gas mixer (8), and the output end of the gas mixer (8) is connected with the inlet of the induced draft fan (10), and the outlet of the induced draft fan (10) is connected into the coal gasifier.
2. The coal gasification furnace coal gas pre-treatment system according to claim 1, characterized in that: The gas input unit comprises an air input pipeline (7) for sending air into the gas mixer (8).
3. The coal gasification furnace coal gas pre-treatment system according to claim 2, characterized in that: The gas input unit further comprises a filter (5) arranged at the port of the air input pipeline (7).
4. The coal gasification furnace coal gas pre-treatment system of claim 1, wherein: A pressure regulating valve (6) is arranged on the gas output pipeline (4).
5. The coal gasification furnace coal gas pre-treatment system of claim 1, wherein: An electrostatic precipitator (9) is further arranged, the output end of the gas mixer (8) is connected with the input end of the electrostatic precipitator (9), and the output end of the electrostatic precipitator (9) is connected with the induced draft fan (10).
6. The coal gasification furnace coal gas pre-treatment system of claim 1, wherein: At least one coal feeding valve (1) is arranged on the top of the coal bunker (2).
7. The coal gasification furnace coal gas pre-treatment system of claim 1, wherein: A pressure transmitter (3) is arranged on the gas output pipeline (4).