Waste incineration flue gas fly ash and nitrogen oxide treatment device

Abstract

The utility model provides a waste incineration flue gas fly ash and nitrogen oxide treatment device, which belongs to the technical field of flue gas treatment and comprises a treatment tank component, a conical integrated hopper component, a multi-layer treatment unit, a medicament spraying component, a fly ash cleaning component, an ash collecting component and a waste liquid discharging component. Flue gas passes through a spiral flow guide plate in a conical integrated hopper to form rotating upflow to enter a rotating inner barrel, a fly ash attachment net in the barrel can dynamically intercept fly ash, and meanwhile an outer wall catalysis module conducts SCR reduction on NOx; and synchronously, the fly ash cleaning assembly automatically scrapes the fly ash captured by the attachment net, and the fly ash downwards falls into a channel formed between the outer wall of the inner conical hopper and the inner wall of the outer conical hopper through the ash guide plate and finally falls into the ash collecting assembly. According to the device, dust removal and denitration are deeply integrated, the interception and catalysis efficiency is enhanced through dynamic rotation design, continuous and automatic cleaning and collection of fly ash are achieved, and the device has the advantages of being compact in structure, efficient in treatment and stable in operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of flue gas treatment, particularly relates to a garbage incineration flue gas fly ash and nitrogen oxide treatment device. BACKGROUND

[0002] The flue gas generated in the garbage incineration process contains a large amount of fly ash and nitrogen oxides (NOx), which poses a serious threat to the environment.

[0003] At present, the industry generally adopts the series discrete treatment process of "electrostatic precipitation / bag-type dust collector + selective catalytic reduction (SCR)". However, this process still faces a series of technical bottlenecks to be solved in practical application: first, the system equipment is huge, and the process flow is long, which not only occupies a large area and has high investment cost, but also the fine fly ash that cannot be completely captured in the front-end dust removal stage is easy to deposit on the surface of the subsequent SCR catalyst, causing the micropore of the catalyst to be blocked and chemically poisoned, resulting in the decrease of the activity and the shortening of the service life of the catalyst, while the system running resistance rises, the maintenance frequency and cost increase significantly; secondly, the internal flow field of the traditional fixed SCR reactor is often unevenly distributed, which is easy to form a flue gas short-circuiting or stagnation zone, causing part of the catalyst to be not fully utilized, and the overall denitration efficiency is difficult to be continuously optimized; thirdly, for the cleaning of fly ash, the existing technology relies on mechanical shaking or manual processing after the system is shut down, which not only destroys the continuity of production operation and increases the labor intensity and safety risk of the operating personnel, but also cannot effectively curb the continuous accumulation and damage of fly ash to the catalyst during the operation process, which is difficult to meet the strict requirements of continuous and stable operation. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the utility model is to provide a garbage incineration flue gas fly ash and nitrogen oxide treatment device, which integrates fly ash dynamic interception and rotating SCR denitration function, and is equipped with an automatic synchronous fly ash cleaning system, can efficiently remove fly ash and nitrogen oxides in flue gas, solve the problems of large traditional discrete process equipment, catalyst poisoning and blocking, and complicated fly ash cleaning and maintenance, and realize long-term, stable and low-energy-consumption continuous operation of the system.

[0005] The purpose of the utility model is realized by the technical scheme, a garbage incineration flue gas fly ash and nitrogen oxide treatment device, which comprises a treatment tank body assembly, a conical integrated hopper component, a multilayer treatment unit, a medicament spraying assembly, a fly ash cleaning assembly and an ash collecting assembly.

[0006] The treatment tank body assembly comprises a main tank body, the conical integrated hopper component comprises an outer conical hopper and an inner conical hopper, the outer conical hopper and the inner conical hopper are arranged inside and outside, and are located at the inner lower end of the main tank body, a through channel is arranged between the outer wall of the inner conical hopper and the inner wall of the outer conical hopper, a spiral guide plate is fixedly connected to the inner wall of the inner conical hopper, and the starting end of the spiral guide plate is connected with an external flue gas supply pipeline.

[0007] The multi-layer processing unit comprises an inner cylinder, a fly ash attachment net, a main shaft vertically and screw-coupled to the middle part of the main tank body, the main body of the inner cylinder being fixedly connected to the main shaft, and the opening position of the lower end of the inner cylinder being sealingly screw-coupled to the top end of the outer conical hopper, the fly ash attachment net being uniformly installed in the side wall of the inner cylinder, the outer wall of the inner cylinder further being provided with a catalytic module, the lower end of the inner wall of the inner cylinder being fixedly connected to a fly ash guide plate, and the fly ash cleaning assembly being fixedly installed at the top end of the inner conical hopper;

[0008] The inner side wall of the main tank body is further provided with a medicament spraying assembly, the medicament spraying assembly comprising spraying main pipes and liquid supply pipes, the medicament spraying assembly being uniformly distributed in the main tank body, the spraying main pipes being fixedly connected to the inner wall of the main tank body, and the inner side of each group of spraying main pipes being provided with spray heads connected thereto, and the liquid supply pipes penetrating through the side wall of the main tank body and being connected to the spraying main pipes;

[0009] The fly ash collection assembly is installed at the outer bottom end of the main tank body and is in communication with the lower end of the passage provided between the inner wall of the outer conical hopper and the outer wall of the inner conical hopper;

[0010] The side wall of the main tank body is further provided with a waste liquid discharge assembly, the waste liquid discharge assembly comprising a waste liquid discharge pipe and a waste liquid discharge valve, the waste liquid discharge pipe being connected to the lower end of the side wall of the main tank body, and the waste liquid discharge valve being installed in the waste liquid discharge pipe.

[0011] The use process of the technical scheme formed by the utility model is as follows:

[0012] The flue gas enters into the inner cavity of the inner conical hopper from the outer end and is in communication with the starting end of the spiral flow guide plate, and the flue gas forms a spiral gas flow rapidly rising under the guidance of the spiral flow guide plate and enters into the inner cavity of the inner cylinder through the top end outlet;

[0013] The fly ash attachment net is in a metal mesh structure, the flue gas entering into the inner cavity of the inner cylinder diffuses into the catalytic module under its own pressure by penetrating through the fly ash attachment net, and the fly ash is captured and intercepted on the inner wall of the fly ash attachment net in the process of the flue gas penetrating through the fly ash attachment net;

[0014] The catalytic module carries an SCR catalyst for reducing NOx and forming a catalytic reduction reaction of NOx;

[0015] The side wall of the main tank body is provided with an outlet end at the upper end, which can discharge the treated flue gas outward for subsequent treatment;

[0016] The main shaft can automatically rotate, and the uniformly distributed fly ash attachment net and the catalytic module can synchronously rotate under the rotation of the main shaft, so that the reaction efficiency and utilization rate of the fly ash attachment net and the catalytic module are improved;

[0017] Meanwhile, under the continuous contact and friction of the inner wall of the fly ash attachment net and the bristles of the fly ash cleaning assembly when the fly ash attachment net rotates, the fly ash intercepted on the inner wall of the fly ash attachment net can be cleaned in time;

[0018] Under the action of the flue gas pressure in the inner cylinder cavity and the gravity of the fly ash, the fly ash cleaned by the fly ash cleaning assembly falls to the top surface of the fly ash guide plate and is guided by the fly ash guide plate to fall to the channel arranged between the inner wall of the outer conical hopper and the outer wall of the inner conical hopper, and finally is collected into the fly ash collecting assembly.

[0019] By adopting the technical scheme, the utility model can form the following beneficial effects:

[0020] (1) The utility model creatively integrates the fly ash physical interception and the SCR catalytic reduction reaction in the same rotating dynamic system, the flue gas forms a rotating upward airflow through the spiral flow guide plate, the initial contact efficiency with the subsequent treatment unit is increased, the core is that the inner cylinder bearing the fly ash attachment net and the catalytic module continuously rotates under the driving of the main shaft, which makes the collision and interception probability of the fly ash particles and the net surface greatly increase when the flue gas passes through the fly ash attachment net; meanwhile, the rotating state breaks the stable state of the airflow boundary layer, forces the flue gas to produce stronger turbulence and diffusion in the catalytic module, makes the contact of the NOx molecules and the catalyst more sufficient and uniform, overcomes the local inactivation problem of the fixed bed catalyst surface caused by the uneven flue gas distribution, forms a mode of synchronous "dynamic interception" and "dynamic catalysis", not only continuously completes two key purification steps in a compact space, but also strengthens the mass transfer and reaction rate of each process through mechanical movement, so that the pollution removal efficiency is significantly improved in the limited volume;

[0021] (2) The utility model realizes automatic fly ash cleaning through the fly ash cleaning assembly and the fly ash guide channel designed in an integrated manner, when the inner wall of the rotating fly ash attachment net passes through the cleaning bristles at the fixed position, the intercepted fly ash is continuously scraped off, the scraped fly ash falls to the fly ash guide plate with a guiding effect under the guidance of the gravity and the downward airflow, and is smoothly introduced into the annular closed channel composed of the outer conical hopper and the inner conical hopper, and finally slides into the bottom fly ash collecting assembly, the process is completely automated, does not need to stop or interrupt the purification process, keeps the fly ash attachment net in a relatively clean and efficient interception state at all times, ensures the smooth airflow channel, the stable system pressure drop, and greatly reduces the frequency and intensity of manual fly ash cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0024] Figure 2 It is a schematic diagram of the structure of the treatment tank assembly and the waste liquid discharge assembly part of the present application.

[0025] Figure 3 It is a cross-sectional schematic diagram of the conical integrated bucket component part of the present application.

[0026] Figure 4 It is a schematic diagram of the structure of the conical integrated bucket component from the first perspective of the present application.

[0027] Figure 5 It is a schematic diagram of the structure of the conical integrated bucket component from the second perspective of the present application.

[0028] Figure 6 It is a schematic diagram of the structure of the fly ash cleaning assembly and the dust collecting assembly part of the present application.

[0029] Figure 7 It is an exploded schematic diagram of the multi-layer treatment unit part of the present application.

[0030] Figure 8 It is a schematic diagram of the structure of the guide dust plate part of the present application.

[0031] Figure 9 It is a schematic diagram of the structure of the medicament spraying assembly part of the present application.

[0032] Reference signs:

[0033] 1, processing tank assembly; 2, conical integrated hopper component; 3, multi-layer processing unit; 4, medicament spraying assembly; 5, fly ash cleaning assembly; 6, ash collecting assembly; 7, waste liquid discharge assembly; 101, main tank body; 102, bottom cover; 103, top cover; 104, support leg; 105, exhaust pipe; 201, outer conical hopper; 202, inner conical hopper; 203, spiral guide plate; 204, support; 205, flue gas inlet pipe; 301, main shaft bottom rotating seat; 302, main shaft top rotating seat; 303, main shaft; 304, speed reducer motor set; 305, inner cylinder body; 306, outer cylinder body; 307, fly ash attachment net; 308, catalytic module; 309, cover; 310, ash guide plate; 401, spraying main pipe; 402, spraying head; 403, liquid supply pipe; 501, support; 502, cleaning brush; 503, top connecting sleeve; 601, ash collecting groove; 602, ash collecting hopper; 701, waste liquid discharge pipe; 702, waste liquid discharge valve. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0036] As Figures 1-9As shown, a kind of waste incineration flue dust and nitrogen oxide processing device, outer cone-shaped bucket 201 and inner cone-shaped bucket 202 are arranged in the outer cone-shaped bucket structure 2, and are located in the inner lower end of main tank body 101, and the inner wall of outer cone-shaped bucket 201 and the outer wall of inner cone-shaped bucket 202 are provided with the channel for dust sliding, the inner wall of inner cone-shaped bucket 202 is fixedly connected with helical guide vane 203, the starting end of helical guide vane 203 is connected with external flue gas supply pipeline, and the helical guide of helical guide vane 203 cooperates with the conical structure of inner cone-shaped bucket 202, so that flue gas forms spiral ascending airflow;

[0037] Main shaft 303 is vertically screwed in the middle part of main tank body 101, and main shaft 303 can automatically rotate, the main body of inner cylinder body 305 is fixedly connected with main shaft 303, and the opening position of lower end of inner cylinder body 305 is sealingly screwed with the top end of outer cone-shaped bucket 201, fly ash adhesion net 307 is uniformly installed in the side wall of inner cylinder body 305, catalytic module 308 is also installed on the outer wall of inner cylinder body 305, and guide plate 310 is fixedly connected to the inner wall of inner cylinder body 305, and guide plate 310 is located below fly ash adhesion net 307, to form the bridge connection between the inner wall of fly ash adhesion net 307 and the channel between the inner wall of outer cone-shaped bucket 201 and the outer wall of inner cone-shaped bucket 202, so that the dust cleaned by fly ash cleaning assembly 5 can smoothly slide into the channel;

[0038] Fly ash cleaning assembly 5 is fixedly installed at the top end of inner cone-shaped bucket 202, and the bristles are in frictional contact with the inner wall of fly ash adhesion net 307;

[0039] Ash collecting assembly 6 is installed at the outer bottom end of main tank body 101, and is communicated with the lower end of the channel between the inner wall of outer cone-shaped bucket 201 and the outer wall of inner cone-shaped bucket 202, for collecting the dust sliding from the channel between the inner wall of outer cone-shaped bucket 201 and the outer wall of inner cone-shaped bucket 202;

[0040] The working principle is as follows:

[0041] Flue gas enters the inner cavity of inner cone-shaped bucket 202 from the outer end, and is communicated with the starting end of helical guide vane 203, and after being guided by helical guide vane 203, flue gas forms rapidly ascending spiral airflow, and enters the inner cavity of inner cylinder body 305 through the top outlet of inner cone-shaped bucket 202;

[0042] Fly ash adhesion net 307 is of wire mesh structure, flue gas in the inner cavity of inner cylinder body 305 diffuses into catalytic module 308 under its own pressure, and fly ash is captured and intercepted on the inner wall of fly ash adhesion net 307 in the process of flue gas passing through fly ash adhesion net 307;

[0043] SCR catalyst is carried in catalytic module 308, for reducing NOx, to form catalytic reduction reaction of NOx.

[0044] The side wall upper end of the main tank body 101 is provided with an outlet end, which can discharge the flue gas treated to completion to the outside for subsequent treatment;

[0045] The main shaft 303 can automatically rotate, and when the main shaft 303 rotates, it can drive the uniformly distributed fly ash attachment net 307 and the catalytic module 308 to rotate synchronously, thereby converting the fly ash attachment net 307 and the catalytic module 308 from a fixed setting state to a dynamic rotating state, and improving the reaction efficiency and utilization rate of the fly ash attachment net 307 and the catalytic module 308;

[0046] At the same time, when the fly ash attachment net 307 rotates, the inner wall thereof continuously contacts and rubs against the bristles of the fly ash cleaning assembly 5, so that the fly ash intercepted on the inner wall of the fly ash attachment net 307 can be cleaned in time;

[0047] Under the action of the flue gas pressure in the inner cavity of the inner cylinder body 305 and the gravity of the fly ash itself, the fly ash cleaned by the fly ash cleaning assembly 5 falls downward to the top surface of the fly ash guide plate 310 and is guided by the fly ash guide plate 310 to fall downward to the passage provided between the inner wall of the outer conical hopper 201 and the outer wall of the inner conical hopper 202, and finally is collected into the fly ash collecting assembly 6.

[0048] The specific structure of the treatment tank body assembly 1 and the waste liquid discharge assembly 7 is shown in Figure 2 The bottom cover 102 is tightly connected to the bottom end opening position of the main tank body 101, and the top cover 103 is tightly connected to the top end opening position of the main tank body 101;

[0049] The outer bottom end of the bottom cover 102 is uniformly fixed with a supporting leg 104 for stable placement of the device;

[0050] The exhaust pipe 105 is connected to the side wall upper end of the main tank body 101 for discharging the treated flue gas to the outside;

[0051] The waste liquid discharge pipe 701 is connected to the side wall lower end of the main tank body 101 and communicates with the lower end of the cavity formed by the outer wall of the outer conical hopper 201 and the inner wall of the main tank body 101, and the waste liquid discharge valve 702 is installed in the waste liquid discharge pipe 701. After the waste liquid discharge valve 702 is opened, the waste liquid accumulated between the outer wall of the outer conical hopper 201 and the inner wall of the main tank body 101 can be discharged, and the guiding of the conical outer wall structure of the outer conical hopper 201 is also conducive to the discharge of the waste liquid.

[0052] The specific structure of the conical integrated hopper component 2 is shown in Figure 3 、 Figure 4 and Figure 5As shown, the top end of the bottom cover 102 is sealingly pressed against the bottom end opening of the outer conical hopper 201, and the supports 204 are evenly connected between the inner wall of the outer conical hopper 201 and the outer wall of the inner conical hopper 202, which can form a stable connection between the outer conical hopper 201 and the inner conical hopper 202, and will not affect the ash guiding effect of the passage between the inner wall of the outer conical hopper 201 and the outer wall of the inner conical hopper 202;

[0053] The flue gas inlet pipe 205 is connected to the inner cavity of the inner conical hopper 202 after passing through the sidewall of the main tank body 101 and the outer conical hopper 201, and is in communication with the starting end of the spiral flow guide plate 203, and the arrangement of the flue gas inlet pipe 205 will not affect the ash guiding effect of the passage between the inner wall of the outer conical hopper 201 and the outer wall of the inner conical hopper 202.

[0054] The specific structure of the multi-layer treatment unit 3, the fly ash cleaning assembly 5 and the ash collecting assembly 6 is shown in Figure 6 、 Figure 7 and Figure 8 As shown, the top end of the bottom cover 102 is sealingly pressed against the bottom end opening of the outer conical hopper 201, and the supports 204 are evenly connected between the inner wall of the outer conical hopper 201 and the outer wall of the inner conical hopper 202, which can form a stable connection between the outer conical hopper 201 and the inner conical hopper 202, and will not affect the ash guiding effect of the passage between the inner wall of the outer conical hopper 201 and the outer wall of the inner conical hopper 202;

[0055] The outer wall of the inner cylinder body 305 is fixedly connected with the outer cylinder body 306 of a frame structure, and the catalytic module 308 is inserted and connected between the outer wall of the inner cylinder body 305 and the inner wall of the outer cylinder body 306. The outer cylinder body 306 and the inner cylinder body 305 are both covered with the cover 309 at the two side ends, so as to form a seal between the outer wall of the inner cylinder body 305 and the inner wall of the outer cylinder body 306, preventing the flue gas discharged from the fly ash attachment net 307 from escaping from the position outside the catalytic module 308;

[0056] The top end of the inner conical hopper 202 is evenly fixed with the bracket 501, and the top connecting sleeve 503 is fixedly connected to the top end of the bracket 501 without interfering with the rotation of the main shaft 303;

[0057] The outer surface of each group of brackets 501 is fixedly connected with the cleaning brush 502, and the cleaning brush 502 is in frictional contact with the inner wall of the fly ash attachment net 307;

[0058] When the fly ash attachment net 307 rotates, the fly ash attached to the inner wall of the fly ash attachment net 307 can be cleaned in time through the contact and friction with the cleaning brush 502;

[0059] The dust collecting groove 601 is evenly arranged in the main body of the bottom cover 102, and the bottom end of each group of dust collecting grooves 601 is provided with a dust collecting hopper 602 for collecting dust.

[0060] The specific structure of the medicament spraying assembly 4 installed on the inner side wall of the main tank body 101 is shown in the figure Figure 9 The medicament spraying assembly 4 is evenly distributed in the main tank body 101, and the spraying main pipe 401 is fixedly connected with the inner wall of the main tank body 101.

[0061] The liquid supply pipe 403 is connected with the spraying main pipe 401 through the side wall of the main tank body 101, and is used for supplying liquid to the spraying main pipe 401.

[0062] The liquid in the spraying main pipe 401 is a reducing agent, and the denitration principle of the device is based on the mature urea selective catalytic reduction (SCR) technology.

[0063] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A waste incineration flue dust and nitrogen oxide treatment device comprising a treatment tank body assembly (1), characterized in that: The cone integrated hopper component (2), the multi-layer processing unit (3), the medicament spraying assembly (4), the fly ash cleaning assembly (5) and the ash collecting assembly (6) are further included. The processing tank body assembly (1) includes a main tank body (101), the cone integrated hopper component (2) includes an outer cone hopper (201) and an inner cone hopper (202), the outer cone hopper (201) and the inner cone hopper (202) are arranged inside and outside, and are located at the lower end of the main tank body (101), a through channel is arranged between the outer wall of the inner cone hopper (202) and the inner wall of the outer cone hopper (201), and a spiral guide plate (203) is fixedly connected to the inner wall of the inner cone hopper (202), and the starting end of the spiral guide plate (203) is connected with an external flue gas supply pipeline. The multi-layer processing unit (3) includes an inner cylinder (305) and a fly ash attachment net (307), a main shaft (303) is vertically and rotatably connected to the middle part of the main tank body (101), the main body of the inner cylinder (305) is fixedly connected with the main shaft (303), and the opening position of the lower end of the inner cylinder (305) is sealingly and rotatably connected with the top end of the outer cone hopper (201), the fly ash attachment net (307) is uniformly arranged in the side wall of the inner cylinder (305), and a catalytic module (308) is further arranged on the outer wall of the inner cylinder (305), a guide plate (310) is fixedly connected to the lower end of the inner wall of the inner cylinder (305), and the fly ash cleaning assembly (5) is fixedly arranged at the top end of the inner cone hopper (202). The medicament spraying assembly (4) is further arranged on the inner side wall of the main tank body (101), and includes a spraying main pipe (401) and a liquid supply pipe (403), the medicament spraying assembly (4) is uniformly arranged in the main tank body (101), the spraying main pipe (401) is fixedly connected with the inner wall of the main tank body (101), a spraying head (402) is arranged on the inner side of each spraying main pipe (401), and the liquid supply pipe (403) is connected with the spraying main pipe (401) through the side wall of the main tank body (101). The ash collecting assembly (6) is arranged at the outer bottom end of the main tank body (101) and is in communication with the lower end of the channel arranged between the inner wall of the outer cone hopper (201) and the outer wall of the inner cone hopper (202). The waste liquid discharge assembly (7) is further arranged in the side wall of the main tank body (101), and includes a waste liquid discharge pipe (701) and a waste liquid discharge valve (702), the waste liquid discharge pipe (701) is connected to the lower end of the side wall of the main tank body (101), and the waste liquid discharge valve (702) is arranged in the waste liquid discharge pipe (701).

2. The device for treating waste incineration flue dust and nitrogen oxides according to claim 1, characterized in that: The processing tank body assembly (1) further includes a bottom cover (102) and an exhaust pipe (105), the bottom cover (102) is sealingly connected to the bottom end of the main tank body (101), a top cover (103) is sealingly connected to the top end of the main tank body (101), and the exhaust pipe (105) is connected to the upper end of the side wall of the main tank body (101).

3. The device for treating waste incineration flue dust and nitrogen oxides according to claim 2, characterized in that: The conical integrated hopper component (2) further comprises a support (204) and a flue gas inlet pipe (205), the top end of the bottom cover (102) is sealingly connected with the bottom end opening position of the outer conical hopper (201), the support (204) is uniformly connected between the inner wall of the outer conical hopper (201) and the outer wall of the inner conical hopper (202), the flue gas inlet pipe (205) is connected with the inner cavity of the inner conical hopper (202) after penetrating through the side wall of the main tank body (101) and the outer conical hopper (201), and is in communication with the starting end of the spiral guide plate (203).

4. The device for treating waste incineration flue dust and nitrogen oxides according to claim 2 or 3, characterized in that: The multi-layer processing unit (3) further comprises a main shaft top rotating seat (302) and a speed reduction motor set (304), the main shaft top rotating seat (302) is fixedly arranged at the inner upper end of the top cover (103), the main shaft bottom rotating seat (301) is fixedly arranged at the middle part of the bottom cover (102), one end of the main shaft (303) is rotatably connected with the main shaft top rotating seat (302), the other end is sealingly rotatably connected with the main shaft bottom rotating seat (301), the speed reduction motor set (304) is fixedly arranged at the outer bottom end of the bottom cover (102), the bottom end of the main shaft (303) is connected with the output end of the speed reduction motor set (304) after penetrating through the bottom cover (102), the outer wall of the inner cylinder body (305) is fixedly connected with the outer cylinder body (306) of a frame structure, the catalytic module (308) is insertedly arranged between the outer wall of the inner cylinder body (305) and the inner wall of the outer cylinder body (306), and the outer cylinder body (306) and the inner cylinder body (305) are both covered with the cover (309) at the two side end positions.

5. The apparatus for treating waste incineration flue dust and nitrogen oxides according to claim 1, 2 or 3, characterized in that: The fly ash cleaning assembly (5) comprises a top connecting sleeve (503), the top end of the inner conical hopper (202) is uniformly fixed with a support (501), the top connecting sleeve (503) is fixedly connected with the top end of the support (501), and the outer surface of each support (501) is fixedly connected with a cleaning brush (502).

6. The device for treating waste incineration flue dust and nitrogen oxides according to claim 2 or 3, characterized in that: The bottom cover (102) is provided with an ash collecting assembly (6), the ash collecting assembly (6) comprises an ash collecting groove (601), the ash collecting groove (601) is uniformly arranged in the main body of the bottom cover (102), and the bottom end outlet position of each ash collecting groove (601) is provided with an ash collecting hopper (602).

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