Chemical chaining gasification and combustion device for sludge treatment

Abstract

The present invention relates to the technical field of sludge treatment, specifically to a chemical chain gasification combustion device for sludge treatment, comprising a frame, a material conveying mechanism, a combustion chamber, a heating mechanism and a heat recovery mechanism, wherein the material conveying mechanism comprises a material conveying pipe and a material conveying drive assembly, the heating mechanism comprises a gas distribution plate, a gas pipe, an igniter, a fire collecting hood and a primary oxygen supply pipe, and the heat recovery mechanism is used to draw the flue gas in the combustion chamber to the outside of the material conveying pipe. The present invention preheats the sludge and the oxygen carrier with the heat generated in the combustion chamber by adding a heat recovery mechanism, thereby improving the heat utilization rate.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, in particular to a chemical chain gasification combustion device for sludge treatment. Background Art

[0002] Among traditional municipal sludge disposal technologies, non-resource landfill accounts for the largest share. In recent years, under the situation of pollution reduction and carbon reduction, the research on thermal chemical conversion of sludge solid waste has become a research hotspot for energy and environmental workers at home and abroad.

[0003] Municipal sludge has a complex composition and is obviously regional. Domestic municipal sludge has high volatile matter and ash content, very little fixed carbon, the lowest is only 0.70%, but the combustible C content is relatively high; the volatile matter and C elements in the sludge of northern cities are higher than those in other regional cities. Under the same sewage treatment process, the organic matter content of northern mud is generally higher than that of southern mud. Therefore, the disposal method of sludge needs to be adapted to local conditions and the corresponding resource technology should be selected. Traditional sludge disposal methods such as fermentation composting, direct landfill and co-combustion power generation are relatively backward in terms of air pollutant control and heavy metal pollution. In recent years, sludge pyrolysis has received attention, and sludge carbon has been used to improve soil with significant results, but there is no major breakthrough technology in rapid and low-energy drying, which has always been a bottleneck problem to be overcome in my country's sludge resource treatment.

[0004] A large number of studies have shown that sludge with high content of hydrocarbon combustible components can be used as fuel for energy utilization. Sludge with a dry calorific value greater than 10.33MJ / kg can achieve self-heating gasification or pyrolysis. Heavy metals and other pollutants in its thermochemical conversion process are easy to effectively control, and the ash produced can be harmlessly utilized. Nitrogen and sulfur elements in sludge are important sources of combustion source pollutants. When the nitrogen and sulfur content in sludge is high, direct incineration will produce a large amount of nitrogen oxides and sulfur dioxide, increasing the load of flue gas denitrification and desulfurization.

[0005] Chemical chaining combustion / gasification of sludge has attracted wide attention as a low-pollution and carbon-reducing treatment method for sludge. In chemical chaining combustion technology, oxygen carriers are continuously reduced and oxidized and regenerated in the series-connected fuel reactor (FR) and air reactor (AR) to achieve oxygen transfer and participate in the thermochemical reaction of the fuel. Heat transfer is carried out due to the reaction heat effect accompanying the process, and the heat released by the oxidation process of the oxygen carrier in the AR is transported to the FR for pyrolysis and gas reforming of the fuel. Adjusting the ratio of oxygen carrier to fuel may achieve self-heating of the gasification / combustion system. Therefore, based on the redox reaction triggered by lattice oxygen, its inherent thermal effect and low pollution advantages make chemical chaining combustion / gasification of sludge have great advantages over traditional sludge thermochemical treatment methods. Compared with water pyrolysis technology, it has more potential in large-scale and continuous production.

[0006] In the field of sludge treatment technology, chemical chain gasification combustion equipment can be used to decompose organic matter in sludge into combustible gas, and then the gasification combustion equipment is used to burn the decomposition gas to produce carbon dioxide and water vapor, which has a good environmental protection effect. Existing chemical chain gasification combustion devices generally only ignite the combustible gas and cannot fully reuse the heat energy of the combustion, resulting in poor heat energy utilization effect. Summary of the invention

[0007] The present invention provides a chemical chain gasification combustion device for sludge treatment. Through heat recovery technology, the heat generated in the combustion chamber can preheat the sludge and oxygen carrier, thereby improving heat utilization.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solutions: A chemical chaining gasification combustion device for sludge treatment comprises a frame, a material conveying mechanism, a combustion chamber, a heating mechanism and a heat recovery mechanism;

[0009] The material conveying mechanism includes a material conveying pipe and a material conveying drive assembly, wherein the material conveying pipe is arranged on the frame in a horizontal direction, and the material conveying pipe passes through the combustion chamber, and a first exhaust hole is arranged at the part of the material conveying pipe located in the combustion chamber, and the first exhaust hole is located on the upper side of the material conveying pipe, and a baffle is arranged around the first exhaust hole; the material conveying drive assembly includes a driving motor and a driving shaft, and the driving shaft is rotatably connected in the material conveying pipe, and the output shaft of the driving motor is transmission-connected to the driving shaft, and a spiral conveying plate is fixedly connected to the outer side of the driving shaft;

[0010] The heating mechanism includes a gas distribution plate, a gas pipe, an igniter, a fire collecting hood and a primary oxygen supply pipe, the gas distribution plate is located in the combustion chamber, the gas distribution plate is an annular structure, a cavity is arranged in the gas distribution plate, a plurality of gas holes are circumferentially arranged on the upper surface of the gas distribution plate, the upper end of the gas pipe penetrates the combustion chamber and then extends into the cavity of the gas distribution plate, the upper end of the igniter penetrates the combustion chamber and then extends into the inner side of the gas distribution plate; the fire collecting hood is a frustum structure with a small top and a large bottom, the fire collecting hood is located below the gas distribution plate, the material conveying pipe penetrates the fire collecting hood, the first exhaust hole is located in the fire collecting hood, the upper end of the primary oxygen supply pipe penetrates the combustion chamber and then extends into the cavity of the gas distribution plate;

[0011] The heat recovery mechanism is used to draw the smoke in the combustion chamber to the outside of the material conveying pipe.

[0012] Furthermore, a feed pipe and a discharge pipe are respectively arranged at both ends of the material conveying pipe, the feed pipe is located on the upper side of the material conveying pipe, and the discharge pipe is located on the lower side of the material conveying pipe.

[0013] Furthermore, a second exhaust hole is arranged on the material conveying pipe, a gas collecting shell is arranged outside the second exhaust hole, a gas collecting pipe is arranged at the upper end of the gas collecting shell, and a gas valve is arranged on the gas collecting pipe.

[0014] Furthermore, a fire-resistant insulation layer is provided on the inner wall of the combustion chamber.

[0015] Furthermore, the gas holes are inclined toward the center of the gas distribution plate.

[0016] Furthermore, the heat recovery mechanism includes a sleeve, a hot air pipe and an induced draft fan, the sleeve is sleeved on the outside of the material conveying pipe, and the two ends of the sleeve are fixedly connected to the outside of the feed pipe and the combustion chamber respectively, a spiral guide plate is arranged between the inner wall of the sleeve and the outer wall of the material conveying pipe, the spiral direction of the spiral guide plate is opposite to the spiral direction of the spiral conveying plate, and the spiral guide plate forms a spiral hot air channel in the pipe gap between the material conveying pipe and the sleeve, the two ends of the hot air pipe are respectively connected to the top of the combustion chamber and the sleeve, the hot air pipe connects the combustion chamber with the spiral hot air channel, the air inlet pipe of the induced draft fan is connected to the sleeve, the position where the sleeve is connected to the hot air pipe is close to one side of the combustion chamber, and the position where the sleeve is connected to the induced draft fan is close to one side of the feed pipe.

[0017] Furthermore, a heat insulation layer is provided on the outside of the hot air pipe.

[0018] Furthermore, a water guide groove is provided on the outer arc surface of the spiral guide plate, and the water guide groove is located at the bottom edge of the spiral guide plate. A water tank is arranged on the frame, and a water inlet pipe located at the upper end of the water tank is connected to a water outlet hole arranged on the lower side of the sleeve. The condensed water in the sleeve passes through the water guide groove and flows into the water tank for collection.

[0019] Furthermore, a smoke capture assembly is arranged in the hot air duct, and the smoke capture assembly includes a capture plate and a smoke capture channel arranged in the capture plate. The capture plate is interference fit with the hot air duct, and the cross-section of the smoke capture channel is a continuous cone. The smoke capture channel effectively increases the number of collisions between particulate matter in the smoke and the capture plate during the rising process, thereby reducing dust in the hot air.

[0020] Furthermore, it also includes a secondary oxygen supply pipe, which is located on one side of the combustion chamber. The secondary oxygen supply pipe penetrates the combustion chamber and extends to the top of the fire collecting hood. In a high temperature environment, the secondary oxygen supply pipe provides oxygen required for secondary combustion for the incompletely burned fuel gas and the dust-containing gas cracked in the sludge, thereby reducing the content of pollutants in the flue gas.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The chemical chain gasification combustion device for sludge treatment disclosed in the present invention recovers the waste heat in the combustion chamber. This part of the waste heat is used to treat the wet sludge particles in the material conveying pipe, effectively utilizing the heat energy generated by combustion and reducing resource waste. At the same time, the water content in the wet sludge particles after preheating is reduced, and the conveying efficiency of the spiral conveyor plate is improved.

[0023] 2. In the chemical chain gasification combustion device for sludge treatment disclosed in the present invention, the spiral direction of the spiral guide plate is opposite to the spiral direction of the spiral conveying plate, which can effectively improve the heat exchange efficiency between the hot gas on the outside of the material conveying pipe and the material on the inside of the material conveying pipe, and further improve the thermal utilization efficiency of the flue gas.

[0024] 3. In the chemical chain gasification combustion device for sludge treatment disclosed by the present invention, condensed water in the sleeve passes through the water guide groove at the lower edge of the spiral guide plate and flows into the water tank, thereby avoiding water accumulation in the sleeve and ensuring the smooth flow of smoke in the sleeve.

[0025] 4. In order to reduce the dust content in the flue gas and ensure the environmental performance of the overall device, the present invention adopts the following two technical means:

[0026] First, add a flue gas capture component in the hot air duct to effectively increase the number of collisions between the particles in the flue gas and the capture plate during the rising process, thereby reducing the dust content in the hot air;

[0027] Secondly, a secondary oxygen supply pipe is set on one side of the combustion chamber to provide the oxygen required for secondary combustion for the incompletely burned fuel gas and the dust-containing gas cracked in the sludge, thereby further reducing the content of pollutants in the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A three-dimensional diagram of a chemical-looping gasification combustion device for sludge treatment in an embodiment;

[0029] Figure 2 for Figure 1 A partial cross-sectional view of

[0030] Figure 3 for Figure 2 The enlarged view of the area marked with number A;

[0031] Figure 4 for Figure 2 The enlarged view of the mark B;

[0032] Figure 5 It is a top view of the chemical looping gasification combustion device for sludge treatment after a secondary oxygen supply pipe is added in the embodiment;

[0033] Figure 6 for Figure 5 Section view in the AA direction;

[0034] Figure 7 is a cross-sectional view of a capture plate in an embodiment;

[0035] Figure 8 A cross-sectional view of another design of a capture plate in an embodiment;

[0036] Fig. 9 for Figure 7 Schematic diagram of the lower end surface of the capture plate being designed as a spherical surface;

[0037] Fig.10 for Figure 8 Schematic diagram of the spherical design of the lower end surface of the capture plate.

[0038] In the figure: 10-frame, 11-water tank, 21-material conveying pipe, 22-feeding pipe, 23-discharging pipe, 24-first exhaust hole, 25-baffle, 26-driving motor, 27-driving shaft, 28-bracket, 29-screw conveying plate, 211-second exhaust hole, 212-gas collecting shell, 213-gas collecting pipe, 30-combustion chamber, 31-refractory insulation layer, 41-gas distribution plate, 42-gas pipe, 43-igniter, 44-fire collecting hood, 45-primary oxygen supply pipe, 46-gas hole, 51-sleeve, 52-hot air pipe, 53-induced draft fan, 54-spiral guide plate, 55-insulation layer, 56-water guide trough, 57-capture plate, 58-smoke capture channel, 581-filter, 59-secondary oxygen supply pipe. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-4 This embodiment provides a chemical chain gasification combustion device for sludge treatment, including a frame 10 and a material conveying mechanism, a combustion chamber 30, a heating mechanism and a heat recovery mechanism arranged on the frame 10.

[0041] The material conveying mechanism includes a material conveying pipe 21 and a material conveying drive assembly, wherein the material conveying pipe 21 is fixedly connected to the frame 10, and the material conveying pipe 21 is arranged in the horizontal direction. A feed pipe 22 is arranged at one end of the material conveying pipe 21, and the feed pipe 22 is located on the upper side of the material conveying pipe 21. A discharge pipe 23 is arranged at the other end of the material conveying pipe 21 after passing through the combustion chamber 30, and the discharge pipe 23 is located on the lower side of the material conveying pipe 21. A first exhaust hole 24 is arranged at the part of the material conveying pipe 21 located at the combustion chamber 30, and the first exhaust hole 24 is located on the upper side of the material conveying pipe 21. A baffle 25 is arranged around the first exhaust hole 24; the material conveying drive assembly includes a drive motor 26 and a drive shaft 27, wherein the drive motor 26 is installed at one end of the material conveying pipe 21 through a bracket 28, and the drive shaft 27 is rotatably connected in the material conveying pipe 21 through a bearing, and the output shaft of the drive motor 26 is coaxially fixed with the drive shaft 27, and a spiral conveying plate 29 is fixedly connected to the outer side of the drive shaft 27.

[0042] As a preferred solution of this embodiment, a second exhaust hole 211 is provided on the material conveying pipe 21, a gas collecting shell 212 is provided outside the second exhaust hole 211, a gas collecting pipe 213 is provided at the upper end of the gas collecting shell 212, and a gas valve is provided on the gas collecting pipe 213.

[0043] The inner wall of the combustion chamber 30 is provided with a refractory heat-insulating layer 31 . The refractory heat-insulating layer 31 in this embodiment is made of ceramsite refractory heat-insulating material.

[0044] The heating mechanism includes a gas distribution plate 41, a gas pipe 42, an igniter 43, a fire collecting hood 44 and a primary oxygen supply pipe 45. The gas distribution plate 41 is located in the combustion chamber 30. The gas distribution plate 41 is an annular structure. A cavity is arranged in the gas distribution plate 41. A plurality of gas holes 46 are circumferentially arranged on the upper surface of the gas distribution plate 41. The gas holes 46 are inclined toward the center of the gas distribution plate 41. The upper end of the gas pipe 42 penetrates through the combustion chamber 30 and then extends into the cavity of the gas distribution plate 41. The upper end of the igniter 43 penetrates through the combustion chamber 30 and then extends into the inner side of the gas distribution plate 41. The fire collecting hood 44 is a frustum structure with a small upper part and a large lower part. The fire collecting hood 44 is located below the gas distribution plate 41. The material conveying pipe 21 penetrates through the fire collecting hood 44. The first exhaust hole 24 is located in the fire collecting hood 44. The upper end of the primary oxygen supply pipe 45 penetrates through the combustion chamber 30 and then extends into the cavity of the gas distribution plate 41.

[0045] The heat recovery mechanism includes a sleeve 51, a hot air pipe 52 and an induced draft fan 53. The sleeve 51 is sleeved on the outside of the material conveying pipe 21. The two ends of the sleeve 51 are fixedly welded to the outer wall of the feed pipe 22 and the combustion chamber 30 respectively. A spiral guide plate 54 is arranged between the inner wall of the sleeve 51 and the outer wall of the material conveying pipe 21. The spiral direction of the spiral guide plate 54 is opposite to the spiral direction of the spiral conveying plate 29. The spiral guide plate 54 forms a spiral hot air channel in the pipe gap between the material conveying pipe 21 and the sleeve 51. The two ends of the hot air pipe 52 are respectively connected to the top of the combustion chamber 30 and the sleeve 51. The hot air pipe 52 connects the combustion chamber 30 with the spiral hot air channel. The air inlet pipe of the induced draft fan 53 is connected to the sleeve 51. The position where the sleeve 51 is connected to the hot air pipe 52 is close to one side of the combustion chamber 30, and the position where the sleeve 51 is connected to the induced draft fan 53 is close to one side of the feed pipe 22. The outside of the hot air pipe 52 is provided with a heat insulation layer 55 , and the heat insulation layer 55 of the present embodiment is made of rock wool insulation material.

[0046] As a preferred solution of this embodiment, a water guide groove 56 is provided on the outer arc surface of the spiral guide plate 54, and the water guide groove 56 is located at the bottom edge of the spiral guide plate 54. A water tank 11 is arranged on the frame 10, and a water inlet pipe located at the upper end of the water tank 11 is connected to a water outlet hole arranged on the lower side of the sleeve 51. The condensed water in the sleeve 51 passes through the water guide groove 56 and flows into the water tank 11 for collection.

[0047] See also Figure 7 and Fig.10 As another preferred solution in this embodiment, a smoke capture component is arranged in the hot air pipe 52, and the smoke capture component includes a capture plate 57 and a smoke capture channel 58 arranged in the capture plate. The capture plate 57 is interference fit with the hot air pipe 52, and the cross-section of the smoke capture channel 58 is a continuous cone. The smoke capture channel 58 effectively increases the number of collisions between the particles in the smoke and the capture plate 57 during the rising process. A filter 581 is installed in the narrow part of the smoke capture channel 58 to reduce dust in the hot air. Figure 7 The collision surface of the flue gas capture channel 58 is greater than Figure 8 The collision surface in Fig. 9 and Fig.10 The lower end surface of the capture plate 57 is designed as a spherical surface that is concave upward, which is conducive to the collection of smoke.

[0048] See also Figure 5 and Figure 6As another preferred solution in this embodiment, it also includes a secondary oxygen supply pipe 59, which is located on one side of the combustion chamber 30. The secondary oxygen supply pipe 59 penetrates the combustion chamber 30 and extends to the top of the fire collecting hood 44. In a high temperature environment, the secondary oxygen supply pipe 59 provides oxygen required for secondary combustion for the incompletely burned fuel gas and the dust-containing gas cracked in the sludge, thereby reducing the content of pollutants in the flue gas.

[0049] The purpose of the chemical chain gasification combustion device for sludge treatment disclosed in this embodiment is to study the performance indicators of oxygen carriers in fuel reactors (FR) and provide a research basis for the subsequent batch preparation of oxygen carriers. The oxygen carrier is an iron-based oxygen carrier prepared by adding calcium dioxide and manganese dioxide powder to solid waste red mud produced by Bayer aluminum processing through a granulator. The sludge uses municipal wet sludge particles with high phosphorus content in ash in Qingdao, Shandong. The working principle of the device is as follows:

[0050] When in use, a mixture of wet sludge particles and oxygen carrier particles is added from the feed pipe 22 to the material conveying pipe 21, the driving motor 26 drives the spiral conveying plate 29 to push and move the mixture, and the igniter 43 sends the combustible gas in the gas distribution plate 41 from the gas pipe 42 to the combustion chamber 30 for primary combustion, and the primary oxygen supply pipe provides oxygen supply for the primary combustion; since the gas holes 46 on the gas distribution plate 41 are inclined toward the center of the gas distribution plate 41, the combustible gas flows toward the center, and then the high-temperature flue gas of the combustible gas is gathered in the fire collecting hood 44 to heat and gasify the mixture in the material conveying pipe 21, and the secondary oxygen supply pipe 59 provides oxygen supply for the combustible gas generated by gasification and the combustible gas that is not fully burned in the gas pipe 42 for secondary combustion; the induced draft fan 53 draws the flue gas in the combustion chamber 30 into the spiral hot air channel, and the hot flue gas preheats the mixture in the material conveying pipe, and the condensed water in the sleeve 51 flows into the water tank 11 through the water guide groove 56.

[0051] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A chemical chain gasification combustion device for sludge treatment, including a frame, a material conveying mechanism, a combustion chamber, a heating mechanism and a heat recovery mechanism; The material conveying mechanism includes a material conveying pipe and a material conveying drive assembly, wherein the material conveying pipe is arranged on the frame in a horizontal direction, and the material conveying pipe passes through the combustion chamber, and a first exhaust hole is arranged at the part of the material conveying pipe located in the combustion chamber, and the first exhaust hole is located on the upper side of the material conveying pipe, and a baffle is arranged around the first exhaust hole; the material conveying drive assembly includes a driving motor and a driving shaft, and the driving shaft is rotatably connected in the material conveying pipe, and the output shaft of the driving motor is transmission-connected to the driving shaft, and a spiral conveying plate is fixedly connected to the outer side of the driving shaft; The heating mechanism includes a gas distribution plate, a gas pipe, an igniter, a fire collecting hood and a primary oxygen supply pipe, the gas distribution plate is located in the combustion chamber, the gas distribution plate is an annular structure, a cavity is arranged in the gas distribution plate, a plurality of gas holes are circumferentially arranged on the upper surface of the gas distribution plate, the gas holes are inclined toward the center of the gas distribution plate, the upper end of the gas pipe penetrates the combustion chamber and then extends into the cavity of the gas distribution plate, the upper end of the igniter penetrates the combustion chamber and then extends into the inner side of the gas distribution plate; the fire collecting hood is a frustum structure with a small top and a large bottom, the fire collecting hood is located below the gas distribution plate, the material conveying pipe penetrates the fire collecting hood, the first exhaust hole is located in the fire collecting hood, the upper end of the primary oxygen supply pipe penetrates the combustion chamber and then extends into the cavity of the gas distribution plate; The heat recovery mechanism is used to draw the smoke in the combustion chamber to the outside of the material conveying pipe; A feed pipe and a discharge pipe are respectively arranged at both ends of the material conveying pipe, the feed pipe is located on the upper side of the material conveying pipe, and the discharge pipe is located on the lower side of the material conveying pipe, characterized in that: The heat recovery mechanism includes a sleeve, a hot air pipe and an induced draft fan, the sleeve is sleeved on the outside of the material conveying pipe, the two ends of the sleeve are fixedly connected to the outside of the feed pipe and the combustion chamber respectively, a spiral guide plate is arranged between the inner wall of the sleeve and the outer wall of the material conveying pipe, the spiral direction of the spiral guide plate is opposite to the spiral direction of the spiral conveying plate, the spiral guide plate forms a spiral hot air channel in the pipe gap between the material conveying pipe and the sleeve, the two ends of the hot air pipe are respectively connected to the top of the combustion chamber and the sleeve, the hot air pipe connects the combustion chamber with the spiral hot air channel, the air inlet pipe of the induced draft fan is connected to the sleeve, the position where the sleeve is connected to the hot air pipe is close to one side of the combustion chamber, and the position where the sleeve is connected to the induced draft fan is close to one side of the feed pipe; The outer arc surface of the spiral guide plate is provided with a water guide groove, and the water guide groove is located at the bottom edge of the spiral guide plate. A water tank is arranged on the frame, and the water inlet pipe located at the upper end of the water tank is connected to the water outlet hole arranged on the lower side of the sleeve. The condensed water in the sleeve passes through the water guide groove and flows into the water tank for collection.

2. The chemical chaining gasification combustion device for sludge treatment according to claim 1 is characterized in that: A second exhaust hole is arranged on the material conveying pipe, a gas collecting shell is arranged outside the second exhaust hole, and a gas collecting pipe is arranged at the upper end of the gas collecting shell.

3. The chemical chaining gasification combustion device for sludge treatment according to claim 1 is characterized in that: The inner wall of the combustion chamber is provided with a fire-resistant heat-insulating layer, and the outside of the hot air pipe is provided with a heat-insulating layer.

4. The chemical chaining gasification combustion device for sludge treatment according to claim 1 is characterized in that: A smoke capture assembly is arranged in the hot air duct, and the smoke capture assembly includes a capture plate and a smoke capture channel arranged in the capture plate. The capture plate is interference fit with the hot air duct, and the cross-section of the smoke capture channel is a continuous cone. The smoke capture channel effectively increases the number of collisions between particulate matter in the smoke and the capture plate during the rising process, thereby reducing dust in the hot air.

5. The chemical chaining gasification combustion device for sludge treatment according to claim 4 is characterized in that: It also includes a secondary oxygen supply pipe, which is located on one side of the combustion chamber. The secondary oxygen supply pipe penetrates the combustion chamber and extends to the top of the fire collecting hood to provide oxygen required for secondary combustion for the incompletely burned fuel gas and the dust-containing gas cracked in the sludge, thereby reducing the content of pollutants in the flue gas.

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