Method and system for treating gasified filter cake
By combining extrusion and heating for dehydration, the filter cake is crushed into fine particles and then subjected to methanation under high temperature and pressure. This solves the problem of incomplete combustion of gasified filter cake, achieving efficient resource recycling and energy reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA ENERGY GRP NINGXIA COAL IND CO LTD
- Filing Date
- 2026-02-10
- Publication Date
- 2026-04-28
AI Technical Summary
Existing technologies are difficult to effectively process gasification filter cake, resulting in incomplete combustion, high energy consumption and insufficient resource utilization. Direct landfilling or co-firing disposal is costly.
A dehydration method combining extrusion and heating is used to crush the filter cake into fine particles, which are then subjected to methanation under high temperature and pressure to produce waste ash and process gas, which are then recycled through gas-solid separation and gas-liquid separation.
It improves the dehydration effect and combustion efficiency of filter cake, reduces energy consumption, realizes the sustainable use of resources, and reduces dependence on auxiliary coal.
Smart Images
Figure CN121929889A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of coal chemical technology, and more specifically, to a method and system for processing gasification filter cake. Background Technology
[0002] In the coal chemical industry, dry coal gasification technology uses pulverized coal and oxygen as raw materials to produce carbon monoxide and hydrogen under high temperature and pressure. Because pulverized coal contains impurities such as silicon, aluminum, and calcium that cannot be gasified, a certain amount of waste residue is often generated. The ash residue formed after the pulverized coal is burned in the gasifier settles in the quench chamber water, forming slag water. Some fine ash carried by the syngas forms black water after passing through the syngas scrubbing system. To avoid environmental pollution, these ash residues require further treatment. Currently, filtration is commonly used to separate them from the system; this is known in the industry as gasification filter cake.
[0003] Gasification filter cake contains some residual carbon and volatile matter, exhibiting a certain degree of combustibility and usability as fuel. However, due to its low fixed carbon content and high moisture content, the filter cake contains not only free water but also a large amount of bound water within its microstructure. Therefore, existing filtration devices struggle to remove all the moisture. Furthermore, compared to pulverized coal, the filter cake has a larger particle size, smaller specific surface area, and fewer internal micropores. Some pore structures are blocked by molten material, hindering gas diffusion and resulting in lower reactivity and combustion difficulties, making it unsuitable for effective utilization. Many companies directly transport the generated gasification filter cake to landfills via slag trucks, occupying significant land resources and incurring substantial processing costs. Another existing technology involves co-firing the gasification filter cake, but this method often requires large amounts of auxiliary coal, making it neither economical nor environmentally friendly.
[0004] In view of this, there is a need to design a method for processing gasified filter cake that can effectively solve or alleviate the above-mentioned technical defects. Summary of the Invention
[0005] The technical problem to be solved by the present invention is to provide a method for processing gasified filter cake, which has a better dehydration effect on the filter cake, more complete combustion, reduced energy consumption, and promotes the sustainable use of resources.
[0006] The technical problem to be solved by the present invention is to provide a system for processing gasified filter cake, which improves the dehydration effect of the filter cake, achieves more complete combustion, reduces energy consumption, and promotes the sustainable use of resources.
[0007] To solve the above-mentioned technical problems, the present invention provides a method for processing gasified filter cake, the method comprising the following steps: (A) The filter cake is squeezed and dehydrated; (B) The filter cake after extrusion and dehydration is then subjected to heating and dehydration; (C) The filter cake after heating and dehydration is crushed to form filter cake particles; (D) The filter cake particles are fed into a combustion system, which is ignited by introducing combustion-supporting gas and combustible gas, so that the filter cake particles undergo a methanation reaction at a temperature of 550℃-650℃ and a pressure of 0.5-0.7MPa to produce waste ash and process gas.
[0008] Preferably, the method for processing the gasified filter cake further includes step (E), which comprises: The waste ash deposited in the combustion system is directly discharged into the ash hopper, and a gas-solid separator is introduced into the process gas to separate the waste ash from the process gas. The waste ash separated by the gas-solid separator is then discharged into the ash hopper.
[0009] Preferably, the method for processing the gasified filter cake further includes step (F), which further includes: The process gas separated by the gas-solid separator is discharged into a gas-liquid separator to separate moisture and dried process gas, and the moisture and dried process gas are recovered respectively. Based on the above-mentioned technical solutions for processing gasified filter cake, the present invention also provides a system for processing gasified filter cake. The system for processing gasified filter cake is used to implement the method for processing gasified filter cake of any of the above-mentioned technical solutions. It includes an extrusion device, a heating device, a pulverizer and the combustion system. The filter cake is sequentially extruded and dehydrated by the extrusion device, heated and dehydrated by the heating device, and pulverized by the pulverizer to form filter cake particles before entering the combustion system.
[0010] Preferably, the combustion system includes an internal combustion furnace, a mixing furnace, and a burner system. The internal combustion furnace is located at the top of the mixing furnace to separate the inner cavity of the mixing furnace into a mixing chamber and a combustion chamber located at the top of the mixing chamber. A certain distance is spaced between the top of the inner wall of the mixing furnace and the outer wall of the internal combustion furnace to form an annular gap. The top and bottom of the internal combustion furnace form an internal combustion furnace inlet and an internal combustion furnace outlet, respectively. The outlet of the pulverizer is connected to the internal combustion furnace inlet. The burner system is located at the internal combustion furnace inlet. The bottom of the mixing furnace forms a mixing furnace outlet. The mixing furnace forms a mixing furnace exhaust port corresponding to the position of the annular gap.
[0011] Preferably, the internal combustion furnace includes a refractory and wear-resistant layer, a support layer, and a heat insulation layer arranged from the inside out.
[0012] Preferably, the system for processing gasified filter cake further includes a combustion gas source, a combustible gas buffer tank, and a combustible gas preheater. The burner system includes a main burner, an ignition burner nested within the main burner, and an ignition device disposed at the ignition burner. The space between the main burner and the ignition burner forms a combustion gas channel for communication with the combustion gas source. The ignition burner is connected to the combustible gas buffer tank. The combustible gas preheater is also disposed between the ignition burner and the combustible gas buffer tank. The main burner is connected to the pulverizer.
[0013] Preferably, the system for processing gasified filter cake further includes a recovery system for recovering waste ash and process gas, the recovery system being connected to the discharge port of the mixing furnace and the exhaust port of the mixing furnace.
[0014] Preferably, the recycling system includes an ash hopper and a gas-solid separator connected to the exhaust port of the mixing furnace, wherein the outlet of the gas-solid separator and the outlet of the mixing furnace are both connected to the ash hopper.
[0015] Preferably, the recovery system further includes a gas-liquid separator for separating moisture and process gas, and the exhaust port of the gas-solid separator is connected to the gas-liquid separator.
[0016] Through the above technical solution, the method for processing gasification filter cake in this application dehydrates and shapes the gasification filter cake through screw extrusion. The filter cake after screw extrusion dehydration is then heated for further dehydration. The dehydration method of screw extrusion and heating achieves a high moisture removal rate from the gasification filter cake, resulting in a filter cake with low moisture content. The dehydrated filter cake is then pulverized to form filter cake particles. These particles are finer, have a larger specific surface area, improve reactivity, and are easier to burn. The filter cake particles are burned in a combustion system to produce process gas (combustible gas), thereby achieving the recycling of the gasification filter cake. Compared with existing methods of co-firing gasification filter cake, this application does not require the consumption of large amounts of auxiliary coal, resulting in lower energy consumption and greater economic and environmental benefits. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of a system for processing gasified filter cake according to a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the combustion system according to a specific embodiment of the present invention; Figure 3 This is a schematic diagram of a burner system according to a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the gas-solid separator according to a specific embodiment of the present invention.
[0018] Explanation of reference numerals in the attached figures 1. Extrusion device; 2. Heating device; 201. Roller conveyor; 202. Belt conveyor; 3. Crusher; 4. Conveying fan; 5. Combustion system; 6. Internal combustion furnace; 7. Mixing furnace; 8. Mixing chamber; 9. Combustion chamber; 10. Annular gap; 11. Inlet of internal combustion furnace; 12. Outlet of mixing furnace; 13. Exhaust port of mixing furnace; 14. Combustion gas source; 15. Combustible gas buffer tank; 16. Combustible gas preheater; 17. Main burner; 18. Ignition burner; 19. Combustion gas passage; 20. Gas-solid separator; 21. Gas-liquid separator; 22. Ash hopper; 23. Outlet of internal combustion furnace. Detailed Implementation
[0019] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of the present invention by way of example, but should not be used to limit the scope of the present invention. The present invention can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
[0020] These embodiments are provided to make the invention thorough and complete, and to fully express the scope of the invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangements and numerical values of the components and steps described in these embodiments should be interpreted as merely exemplary and not as limiting.
[0021] It should be noted that, in the description of this invention, unless otherwise stated, the indicated orientations or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.
[0022] Furthermore, the use of terms such as "comprising" or "including" in this invention means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that it may also cover other elements.
[0023] It should also be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.
[0024] All terms used in this invention have the same meaning as understood by one of ordinary skill in the art to which this invention pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.
[0025] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.
[0026] To achieve the above objectives, this application provides a method for processing gasified filter cake, which includes the following steps: (A) The filter cake is squeezed and dehydrated; (B) The filter cake after extrusion and dehydration is then heated and dehydrated; (C) The filter cake after heating and dehydration is crushed to form filter cake particles; (D) The filter cake particles are fed into the combustion system 5. The combustion system 5 is ignited with combustion-supporting gas and combustible gas, so that the filter cake particles undergo a methanation reaction at a temperature of 550℃-650℃ and a pressure of 0.5-0.7MPa to produce waste ash and process gas.
[0027] Because existing vacuum filtration dehydration methods stop reducing the moisture content of the filter cake after a certain point, the dehydrated filter cake still has a high moisture content, which easily leads to incomplete combustion and makes incineration difficult. Therefore, the method for processing gasification filter cake in this application uses a combination of extrusion dehydration and heating to remove moisture from the gasification filter cake. Compared with existing vacuum filtration dehydration methods, the dehydration effect is better, and the dehydrated gasification filter cake has a lower moisture content. After dehydration, the filter cake is further crushed into smaller filter cake particles. The particles have a small specific surface area, high reactivity, good combustibility, and lower energy consumption during combustion. They do not require co-combustion with auxiliary coal and can be directly fed into the combustion system. The residual carbon and oxygen in the filter cake particles react at a temperature of 550℃-650℃ and a pressure of 0.5-0.7MPa to produce waste ash and process gas. The process gas contains methane and carbon monoxide, which improves the utilization rate of the gasified filter cake to more efficiently generate easily usable combustible process gas. This achieves the recycling of the gasified filter cake, making it more economical and environmentally friendly.
[0028] In a preferred embodiment, the method for processing the gasified filter cake further includes step (E), which comprises: The waste ash deposited in the combustion system 5 is directly discharged into the ash hopper 22, and the process gas is introduced into the gas-solid separator 20. The waste ash in the process gas is separated by the gas-solid separator 20, and the waste ash separated by the gas-solid separator 20 is discharged into the ash hopper 22, so as to realize the separate recovery of waste ash and process gas and improve the purity of process gas.
[0029] In a preferred embodiment, the method for processing the gasified filter cake further includes step (F), which further includes: The process gas separated by the gas-solid separator 20 is discharged into the gas-liquid separator 21 to separate the water and dry process gas. The water and dry process gas are recovered separately to improve the purity of the process gas and ensure that it has good combustion performance.
[0030] In a preferred embodiment, a pre-prepared low-pressure combustible gas is introduced into the combustion system 5 during the initial combustion phase. After the combustion in the combustion system 5 stabilizes, the separated process gas can be introduced into the combustion system 5 to replace the low-pressure combustible gas for combustion, thereby reducing costs.
[0031] Based on the method for processing gasified filter cake mentioned in the above technical solutions of the present invention, the present invention provides a system for processing gasified filter cake. The system for processing gasified filter cake is used to implement the method for processing gasified filter cake of any of the above technical solutions. It includes an extrusion device 1, a heating device 2, a pulverizer 3 and a combustion system 5 arranged in sequence. The filter cake is dehydrated by passing through the extrusion device 1 and the heating device 2 in sequence, and then pulverized by the pulverizer 3 before entering the combustion system 5 to react and produce waste ash and process gas.
[0032] like Figure 1 As shown, in this embodiment, the wet filter cake to be processed enters the extrusion device 1. The extrusion device 1 in this embodiment is a screw extrusion device. Under the action of the screw, the filter cake is fed into the screw chamber of the extrusion device 1. As the screw pitch decreases, the shear force on the filter cake gradually increases. The water in the filter cake is squeezed out from the screw chamber and discharged through the drain hole of the extrusion device 1. The dehydrated filter cake is discharged through the conical discharge port of the extrusion device 1. The dehydrated filter cake can form a relatively uniform strip for easy subsequent transportation. The dehydrated filter cake is conveyed to the heating device 2. The heating device 2 includes a roller conveyor 201 and a belt conveyor 202 set below the roller conveyor 201. The dehydrated filter cake falls from the conical discharge port of the extrusion device 1 onto the roller conveyor 201. The roller conveyor 201 has a heat source inside the roller to increase the surface temperature of the roller. Thus, the roller can not only transport the filter cake to the crusher 3, but also continuously heat the filter cake during transportation. The belt conveyor 202 located below the roller conveyor 201 is used to receive the filter cake that falls from the gap between the rollers and to re-convey these filter cakes to the extrusion device 1 for extrusion and dewatering.
[0033] As a preferred implementation method, such as Figure 1 and Figure 2 As shown, the combustion system 5 includes an internal combustion furnace 6, a mixing furnace 7, and a burner system. The internal combustion furnace 6 is located at the top of the mixing furnace 7, dividing the inner cavity of the mixing furnace 7 into a mixing chamber 8 and a combustion chamber 9 located at the top of the mixing chamber 8. A certain distance is maintained between the top of the inner wall of the mixing furnace 7 and the outer wall of the internal combustion furnace 6 to form an annular gap 10. The top and bottom of the internal combustion furnace 6 form an internal combustion furnace inlet 11 and an internal combustion furnace outlet 23, respectively. The outlet of the crusher 3 is connected to the internal combustion furnace inlet 11. The burner system is located at the internal combustion furnace inlet 11. The bottom of the mixing furnace 7 forms a mixing chamber... The discharge port 12 of the combined furnace and the exhaust port 13 of the mixing furnace 7 are formed at the position corresponding to the annular gap 10. The filter cake particles enter the combustion chamber 9 through the feed port 11 of the combustion furnace. After the burner system is ignited, the filter cake particles react in the combustion chamber 9 to produce waste ash and process gas. The combustion-supporting gas will carry the waste ash and process gas produced after combustion into the lower mixing chamber 8. Due to the certain height difference between the discharge port 23 of the inner combustion furnace and the discharge port 12 of the mixing furnace, the waste ash settles naturally due to gravity until it is discharged from the discharge port 12 of the mixing furnace 7. The process gas rises to the annular gap 10 and is discharged from the exhaust port 13 of the mixing furnace.
[0034] In one preferred embodiment, the internal combustion furnace 6 includes a refractory and wear-resistant layer, a support layer, and a heat insulation layer arranged from the inside out. In some specific embodiments, the combustion furnace is provided with silicon carbide ramming material with good wear resistance, lightweight alumina castable, and aluminum silicate fiber felt with good heat insulation properties arranged from the inside out.
[0035] As a preferred implementation method, such as Figure 1 and Figure 3As shown, the system for processing gasified filter cake also includes a combustion gas source 14, a combustible gas buffer tank 15, and a combustible gas preheater 16. The burner system is a combined burner system, comprising a main burner 17, an ignition burner 18 nested within the main burner 17, and an ignition device located at the ignition burner 18. The annular space between the main burner 17 and the ignition burner 18 forms a combustion gas channel 19 for communication with the combustion gas source 14. The ignition burner 18 is connected to the combustible gas buffer tank 15, and a combustible gas preheater 16 is also provided between the ignition burner 18 and the combustible gas buffer tank 15. The main burner 17 is connected to a pulverizer 3, and a conveying fan 4 can be installed between the pulverizer 3 and the main burner 17 to convey the filter cake particles to the combustion system 5 before entering the main burner 17. Oxygen can be used as the combustion gas. The combustible gas buffer tank 15 stores low-pressure combustible gas. This low-pressure combustible gas is preheated to a certain temperature by the combustible gas preheater 16 before entering the ignition burner 18. Alternatively, a preheater can be installed to preheat the auxiliary combustion gas. The combustible gas ejected from the ignition burner 18 mixes with the oxygen ejected from the auxiliary combustion gas channel 19 and is ignited by an ignition device. Simultaneously, dried and pulverized filter cake particles are ejected from the main burner 17, where oxygen reacts with residual carbon in the filter cake particles under high-temperature conditions. This combined burner design in this embodiment improves gasification reaction efficiency, resulting in more complete combustion.
[0036] In a preferred embodiment, the system for processing gasified filter cake further includes a recovery system for recovering waste ash and process gas. The recovery system is connected to the discharge port 12 of the mixing furnace and the exhaust port 13 of the mixing furnace, and the waste ash and process gas are recovered through the recovery system respectively.
[0037] In a preferred embodiment, the recycling system includes an ash hopper 22 and a gas-solid separator 20 connected to the exhaust port 13 of the mixing furnace. The outlet of the gas-solid separator 20 and the outlet 12 of the mixing furnace are both connected to the ash hopper 22. The gas-solid separator 20 can be as follows: Figure 4 The cyclone separator shown has one or more horizontal tangential inlets at the top and an outlet at the bottom. An overflow pipe is also installed at the top of the cyclone separator, and a bag filter can be installed at the top of the overflow pipe. Part of the waste ash in the mixing chamber 8 is discharged through the mixing furnace outlet 12 and collected in the ash hopper 22. The other part of the waste ash is discharged with the process gas from the mixing furnace exhaust port 13 and enters the gas-solid separator 20. After entering the separator chamber, the gas and solid mixture separates on the inner wall due to the difference in centrifugal force between the gas and solid. The waste ash enters the ash hopper 22 by gravity through the bottom outlet, while the process gas enters the bag filter through the top overflow pipe for dust removal, completing further purification. The waste ash collected in the ash hopper 22 can be used for construction, road construction, soil improvement, or wastewater treatment.
[0038] As a preferred implementation method, such as Figure 1As shown, the recovery system also includes a gas-liquid separator 21 for separating moisture and process gas. The exhaust port of the gas-solid separator 20 is connected to the gas-liquid separator 21 to separate water and process gas. After the filter cake in the combustion system 5 is stably burned, the separated process gas can be used to replace the combustible gas in the combustible gas buffer tank 15 to reduce costs. Since the separated water has a high temperature, its steam waste heat can be used to heat the roller shaft of the roller conveyor 201 after depressurization, thereby reducing system energy consumption through the recovery and utilization of waste heat.
[0039] As can be seen from the above description, the advantages of the present invention are as follows: First, the dehydration method using extrusion dehydration and heating dehydration has a good dehydration effect, and the pulverized filter cake particles have a large specific surface area and high reactivity, eliminating the need to add a large amount of auxiliary coal for co-firing; Second, the waste ash, residual heat and process gas after combustion are recovered and utilized, reducing resource waste; Third, the use of combined burners improves the gasification reaction efficiency and makes combustion more complete.
[0040] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.
[0041] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.
[0042] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.
Claims
1. A method for processing gasified filter cake, characterized in that, Includes the following steps: (A) The filter cake is squeezed and dehydrated; (B) The filter cake after extrusion and dehydration is then subjected to heating and dehydration; (C) The filter cake after heating and dehydration is crushed to form filter cake particles; (D) The filter cake particles are fed into the combustion system (5), which introduces combustion-supporting gas and combustible gas and ignites them, so that the filter cake particles undergo methanation reaction at a temperature of 550℃-650℃ and a pressure of 0.5-0.7MPa to produce waste ash and process gas.
2. The method for processing gasified filter cake according to claim 1, characterized in that, It also includes step (E), which includes: The waste ash deposited in the combustion system (5) is directly discharged into the ash hopper (22), and the process gas is introduced into the gas-solid separator (20). The waste ash in the process gas is separated by the gas-solid separator (20), and the waste ash separated by the gas-solid separator (20) is discharged into the ash hopper (22).
3. The method for processing gasified filter cake according to claim 2, characterized in that, It also includes step (F), which comprises: The process gas separated by the gas-solid separator (20) is discharged into the gas-liquid separator (21) to separate the water and dry process gas, and the water and dry process gas are recovered respectively.
4. A system for processing gasified filter cake, characterized in that, The method for processing gasified filter cake according to any one of claims 1 to 3 includes an extrusion device (1), a heating device (2), a pulverizer (3) and the combustion system (5), wherein the filter cake is extruded and dehydrated by the extrusion device (1), heated and dehydrated by the heating device (2), and pulverized by the pulverizer (3) to form the filter cake particles before entering the combustion system (5).
5. The system for processing gasified filter cake according to claim 4, characterized in that, The combustion system (5) includes an internal combustion furnace (6), a mixing furnace (7), and a burner system. The internal combustion furnace (6) is located at the top of the mixing furnace (7) to separate the inner cavity of the mixing furnace (7) into a mixing chamber (8) and a combustion chamber (9) located at the top of the mixing chamber (8). A certain distance is spaced between the top of the inner wall of the mixing furnace (7) and the outer wall of the internal combustion furnace (6) to form an annular gap (10). The top and bottom of the internal combustion furnace (6) form an internal combustion furnace inlet (11) and an internal combustion furnace outlet (23), respectively. The outlet of the pulverizer (3) is connected to the internal combustion furnace inlet (11). The burner system is located at the internal combustion furnace inlet (11). The bottom of the mixing furnace (7) forms a mixing furnace outlet (12). The mixing furnace (7) forms a mixing furnace exhaust port (13) corresponding to the position of the annular gap (10).
6. The system for processing gasified filter cake according to claim 5, characterized in that, The internal combustion furnace (6) includes a refractory and wear-resistant layer, a support layer, and a heat insulation layer arranged from the inside out.
7. The system for processing gasified filter cake according to claim 5, characterized in that, It also includes a combustion gas source (14), a combustible gas buffer tank (15), and a combustible gas preheater (16). The burner system includes a main burner (17), an ignition burner (18) nested in the main burner (17), and an ignition device disposed at the ignition burner (18). The space between the main burner (17) and the ignition burner (18) forms a combustion gas channel (19) for communicating with the combustion gas source (14). The ignition burner (18) is connected to the combustible gas buffer tank (15). The combustible gas preheater (16) is also disposed between the ignition burner (18) and the combustible gas buffer tank (15). The main burner (17) is connected to the pulverizer (3).
8. The system for processing gasified filter cake according to claim 5, characterized in that, It also includes a recovery system for recovering waste ash and process gas, the recovery system being connected to the discharge port (12) of the mixing furnace and the exhaust port (13) of the mixing furnace.
9. The system for processing gasified filter cake according to claim 8, characterized in that, The recycling system includes an ash hopper (22) and a gas-solid separator (20) connected to the exhaust port (13) of the mixing furnace. The outlet of the gas-solid separator (20) and the outlet (12) of the mixing furnace are both connected to the ash hopper (22).
10. The system for processing gasified filter cake according to claim 9, characterized in that, The recovery system also includes a gas-liquid separator (21) for separating moisture and process gas, and the exhaust port of the gas-solid separator (20) is connected to the gas-liquid separator (21).