An odor collection and treatment system for fly ash landfill and its collection and treatment method

Abstract

The present invention discloses an odor collection and treatment system for a fly ash landfill. It includes a fly ash landfill odor collection system and a fly ash landfill odor treatment system; the fly ash landfill odor collection system is connected to the fly ash landfill odor treatment system; the fly ash landfill odor collection system includes an odor collection trench and an odor delivery pipe; the odor collection trench is connected to the odor delivery pipe; the fly ash landfill odor treatment system includes a plasma reaction tower, a spray tower, an anti-corrosion fan, and an exhaust stack; the plasma reaction tower, the spray tower, the anti-corrosion fan, and the exhaust stack are connected in series in sequence. The present invention has the advantages of simple and convenient construction, low investment and operation costs, good deodorization effect, and high pollutant removal efficiency. The present invention also discloses an odor collection and treatment method for the odor collection and treatment system of the fly ash landfill.

Description

Technical Field

[0001] The present invention relates to the field of unorganized odor treatment, more specifically, it is a fly ash landfill odor collection and treatment system. The present invention also relates to an odor collection and treatment method of the fly ash landfill odor collection and treatment system. Background Art

[0002] As land resources become increasingly scarce, the domestic waste treatment method has gradually changed from landfill to incineration. After the incineration of domestic waste, the fly ash produced needs to be sent to the landfill for disposal as hazardous waste. However, the fly ash after landfill will still produce some odor; if these odors are not treated in time, it will not only affect the normal life of the surrounding residents, but also may cause environmental pollution problems.

[0003] At present, the odor of fly ash landfill in China is mainly deodorized by spraying biological / plant agents and using wind cannons. However, due to the large area of the landfill and the multiple sources of odor, the traditional methods cannot effectively control the spread of odor. In recent years, some people have proposed a method for systematically treating odor in landfills. The patent CN205650044U introduces a method for collecting odor using pipes and treating it through a deodorizing tower. Since a large number of pipes need to be laid, laying pipes involves multiple processes such as excavation, foundation replacement, installation, and backfilling, which is not only time-consuming but also has a high construction cost. If the odor is treated only by a deodorizing tower, there is still a risk of excessive pollutants in the tail gas.

[0004] The diffusion of odor from fly ash landfills to the surrounding environment is a process of unorganized emissions. The deodorization effect of traditional processes is limited, while new processes have more or less problems such as large construction volume, high construction costs, and incomplete pollutant treatment.

[0005] Therefore, it is very necessary to develop a fly ash landfill odor treatment system and method that is simple and convenient to construct, has good deodorization effect, and has high pollutant removal efficiency. Summary of the invention

[0006] The first purpose of the present invention is to provide a fly ash landfill odor collection and treatment system, which has simple and convenient construction, low investment and operation costs, good deodorization effect and high pollutant removal efficiency.

[0007] The second object of the present invention is to provide an odor collection and treatment method for a fly ash landfill odor collection and treatment system, which has good deodorization effect and high pollutant removal efficiency.

[0008] In order to achieve the first object of the present invention, the technical solution of the present invention is: a fly ash landfill odor collection and treatment system, characterized in that: it includes a fly ash landfill odor collection system and a fly ash landfill odor treatment system; the fly ash landfill odor collection system is connected to the fly ash landfill odor treatment system;

[0009] The odor collection system of the fly ash landfill includes an odor collection trench and an odor delivery pipe; the odor collection trench is connected to the odor delivery pipe;

[0010] The odor treatment system of the fly ash landfill includes a plasma reaction tower, a spray tower, and an anti-corrosion fan; the plasma reaction tower, the spray tower, and the anti-corrosion fan are connected in series in sequence; the anti-corrosion fan is connected to an exhaust stack.

[0011] In the above technical solution, the odor collection trench includes a trench main body, a wire mesh skeleton, and a geomembrane; the trench main body includes a semi-circular trench, a yellow sand cushion layer, and a gravel layer; the yellow sand cushion layer and the gravel layer are laid on the semi-circular trench in sequence from bottom to top;

[0012] The wire mesh skeleton and the geomembrane are laid on the trench main body from bottom to top in sequence.

[0013] In the above technical solution, the odor collection trench includes an odor collection branch trench and an odor collection main trench;

[0014] Both the odor collection branch trench and the odor collection main trench are arranged on the fly ash landfill;

[0015] There are multiple odor collection branch trenches, and the multiple odor collection branch trenches are arranged at intervals; the odor collection main trench is respectively connected to the multiple odor collection branch trenches;

[0016] The odor collection main trench is connected to the odor delivery pipe;

[0017] The odor delivery pipe is connected to the plasma reaction tower.

[0018] In the above technical solution, the plasma reaction tower includes a plasma narrow pulse high voltage power supply and a plasma generator; the plasma narrow pulse high voltage power supply is connected to the plasma generator.

[0019] In the above technical solution, the spray tower includes a spray tower housing, an alkali liquid spraying device, an alkali liquid storage tank, and a demister;

[0020] There are multiple alkali liquid spraying devices, and the multiple alkali liquid spraying devices are arranged at intervals in the spray tower housing; the demister is arranged at the upper end of the spray tower housing and above the alkali liquid spraying device;

[0021] The alkali liquid storage tank is arranged outside the spray tower housing; the multiple alkali liquid spraying devices are all connected to the alkali liquid storage tank;

[0022] An alkali liquid circulation pump is arranged in the alkali liquid storage tank.

[0023] In order to achieve the second object of the present invention, the technical solution of the present invention is: the odor collection and treatment method of the odor collection and treatment system of the fly ash landfill, which is characterized in that: it includes the following steps:

[0024] Step 1: Construction and installation of the odor collection and treatment system;

[0025] By shaping the soil covering of the intermediate or final covering layer of the fly ash landfill, a semi-circular ditch is excavated on the surface of the soil covering layer. A yellow sand cushion layer and a gravel layer are successively laid from bottom to top at the bottom of the ditch to form the main body of the ditch;

[0026] A wire mesh skeleton and a geomembrane are successively laid above the main body of the ditch to form a closed odor collection ditch;

[0027] According to the construction method of the above-mentioned odor collection branch ditch, the odor collection branch ditches are arranged on the surface of the fly ash landfill at a certain interval, and the main odor collection ditch is constructed; all the odor collection branch ditches are connected by a main odor collection ditch;

[0028] The main odor collection ditch extends towards the odor treatment system, and the area beyond the landfill is changed to be connected by pipes; finally, a complete odor collection system for the fly ash landfill is formed;

[0029] Step 2: Operation of the odor treatment system for the fly ash landfill;

[0030] The odor collected by the odor collection branch ditch is gathered through the main odor collection ditch, and then sent into the fly ash landfill odor treatment system through the odor delivery pipe; the pollutants in the odor entering the plasma reaction tower of the fly ash landfill odor treatment system are fully decomposed into H2O, CO2, SO2, NO2 and N2O5 under the action of plasma, so as to achieve deodorization;

[0031] The waste gas discharged from the plasma reaction tower enters the spray tower. After being washed by the alkaline liquid sprayed by the spray tower, the pollutants in the waste gas are effectively removed, and finally discharged through the deodorization fan and the exhaust pipe.

[0032] In the above technical solution, the alkaline liquid of the spray tower is supplied by the alkaline liquid circulation pump in the alkaline liquid storage tank. The alkaline liquid is sent into the alkaline liquid spraying device to be atomized and then contacts and reacts with the waste gas in the spray tower; the reacted liquid falls to the bottom of the spray tower and finally gathers in the alkaline liquid storage tank, and is recycled under the action of the alkaline liquid circulation pump.

[0033] The present invention has the following advantages:

[0034] (1) Simple and convenient construction, low investment and construction cost; the present invention uses a ditch to replace the odor collection pipe, reduces the construction steps, saves the input of materials, not only can shorten the construction time, but also can reduce the construction cost;

[0035] (2) Good deodorization effect; the present invention uses a plasma reaction tower to remove the pollutants in the odor, with fast treatment speed and good treatment effect;

[0036] (3) Low operating cost; the plasma generating device in the present invention adopts a narrow pulse high-voltage power supply, with high efficiency in generating plasma, low operating energy consumption, and saving operating costs;

[0037] (4) High pollutant removal efficiency; a spray tower is added after the plasma reaction tower in the present invention to further remove pollutants in the waste gas, ensuring the up-to-standard discharge of the waste gas at the outlet of the exhaust stack, and being more environmentally friendly. Description of the Drawings

[0038] Figure 1 It is a process flow chart of the odor collection and treatment system for the fly ash landfill.

[0039] Figure 2 It is a structural schematic diagram of the odor collection system for the fly ash landfill in the present invention.

[0040] Figure 3 It is a structural schematic diagram of the odor collection trench in the present invention.

[0041] Figure 4 It is a structural schematic diagram of the odor treatment system for the fly ash landfill in the present invention.

[0042] In the figure, 1 - odor collection branch trench, 2 - odor collection main trench, 3 - odor delivery pipe, 4 - plasma reaction tower, 4-1 - plasma narrow pulse high-voltage power supply, 4-2 - plasma generator, 5 - spray tower, 5-1 - alkali liquid spraying device, 5-2 - alkali liquid storage tank, 5-3 - demister, 6 - anti-corrosion fan, 7 - exhaust stack, a - geomembrane, b - wire mesh skeleton, c - crushed stones, d - yellow sand cushion layer, e - covering soil layer, f - fly ash layer. Detailed Description of the Invention

[0043] The following will describe the implementation of the present invention in detail with reference to the drawings. However, they do not constitute a limitation to the present invention and are only for illustration purposes. At the same time, the advantages of the present invention will be made clearer and easier to understand through the description.

[0044] Referring to the drawings, it can be seen that an odor collection and treatment system for a fly ash landfill includes an odor collection system for the fly ash landfill and an odor treatment system for the fly ash landfill; the odor collection system for the fly ash landfill is connected to the odor treatment system for the fly ash landfill;

[0045] The odor collection system for the fly ash landfill includes an odor collection trench and an odor delivery pipe 3; the odor collection trench is connected to the odor delivery pipe 3; between the fly ash landfill and the odor treatment system, the odor is transported through the laid odor collection pipe; in the present invention, the odor is collected in the odor collection trench in the landfill area, and the odor in the odor collection trench is transported to the odor treatment system for the fly ash landfill through the odor delivery pipe 3 laid outside the landfill area and between the fly ash landfill and the odor treatment system for the fly ash landfill, and then discharged after being treated.

[0046] Using a ventilation ditch to replace the pipeline for collecting odor can eliminate the installation and backfilling processes, save construction time, and reduce construction costs. Considering that pipelines are more easily connected to the subsequent odor treatment system, the odor collection system in the landfill uses a combination of ditches and pipelines for collection.

[0047] The odor treatment system for the fly ash landfill includes a plasma reaction tower 4, a spray tower 5, and an anti-corrosion fan 6; the plasma reaction tower 4, the spray tower 5, and the anti-corrosion fan 6 are connected in series in sequence.

[0048] The anti-corrosion fan 6 is connected to the exhaust stack 7 (as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 ).

[0049] Furthermore, the odor collection ditch is built on the intermediate or final covering soil layer e in the landfill, and the covering soil layer e is located on the fly ash layer f; the odor collection ditch includes a ditch main body, a wire mesh skeleton b, and a geomembrane a; the ditch main body includes a semi-circular ditch, a yellow sand cushion layer d, and a gravel layer c; the yellow sand cushion layer d and the gravel layer c are laid on the bottom of the semi-circular ditch in sequence from bottom to top.

[0050] The wire mesh skeleton b and the geomembrane a are laid on the ditch main body in sequence from bottom to top to form a closed odor collection ditch structure (as shown in Figure 3 ) to prevent the fly ash from being sucked away by the negative pressure during the odor collection process; a wire mesh is covered above the excavated ditch to provide support for the subsequent covering layer; a layer of geomembrane is covered on the surface of the fly ash landfill heap to prevent odor from overflowing and also ensure the sealing of all ditches.

[0051] The geomembrane a is preferably an HDPE geomembrane.

[0052] Furthermore, the odor collection ditch includes an odor collection branch ditch 1 and an odor collection main ditch 2;

[0053] Both the odor collection branch ditch 1 and the odor collection main ditch 2 are arranged on the fly ash landfill;

[0054] There are multiple odor collection branch ditches 1, and the multiple odor collection branch ditches 1 are arranged at intervals; the odor collection main ditch 2 is respectively connected to the multiple odor collection branch ditches 1;

[0055] The odor collection main ditch 2 is connected to the odor delivery pipe 3;

[0056] The odor delivery pipe 3 is connected to the plasma reaction tower 4 (as shown in Figure 2 , Figure 3 , Figure 4 ).

[0057] Figure 4 In, A represents the odor inlet.

[0058] Furthermore, the plasma reaction tower 4 includes a plasma narrow pulse high voltage power supply 4-1 and a plasma generator 4-2; the plasma narrow pulse high voltage power supply 4-1 is connected to the plasma generator 4-2 (as Figure 4 shown); the key of the plasma reaction tower lies in the plasma generator; the plasma generator in the present invention is configured with a new type of plasma narrow pulse high voltage power supply, and by adjusting the voltage and frequency parameters of the pulse power supply, the generation amount of plasma is controlled. The generated plasma oxidizes the pollutant molecules in the odor gas into H2O, CO2, SO2, NO2, N2O5, etc., thereby achieving the removal of odor.

[0059] Furthermore, the spray tower 5 includes a spray tower housing, an alkali liquor spraying device 5-1, an alkali liquor storage tank 5-2, and a demister 5-3;

[0060] There are multiple alkali liquor spraying devices 5-1, and the multiple alkali liquor spraying devices 5-1 are arranged at intervals inside the spray tower housing; the demister 5-3 is arranged at the upper end of the spray tower housing and above the alkali liquor spraying device 5-1;

[0061] The alkali liquor storage tank 5-2 is arranged outside the spray tower housing; the multiple alkali liquor spraying devices 5-1 are all connected to the alkali liquor storage tank 5-2;

[0062] The alkali liquor circulation pump is arranged inside the alkali liquor storage tank 5-2 (as Figure 4 shown); the acidic substances such as SO2 and NO2 generated after the odor gas is treated by the plasma reaction tower still need to be further purified through the spray tower. The waste gas coming out of the plasma tower enters from the bottom of the spray tower, and after being distributed by the gas distributor, the gas moves upward in the tower. During the process, the waste gas acts on the atomized alkali liquor of the atomizer, and after physical adsorption and chemical reaction, the pollutants in the waste gas are purified. Finally, the waste gas is discharged after being demisted by the demister. The alkali liquor in the spray tower is circulated by the slurry circulation pump, and the wastewater discharged regularly is sent to the wastewater treatment pond for disposal.

[0063] The deodorization fan provides power for the transportation of the waste gas in the system, and at the same time ensures the slightly negative pressure environment of the odor gas collection system in the landfill storage, preventing the overflow of odor gas. Since the waste gas may contain a small amount of corrosive substances, the deodorization fan is preferably an anti-corrosion deodorization fan (i.e., the anti-corrosion fan 6).

[0064] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 shown, the odor gas collection and treatment method of the fly ash landfill odor gas collection and treatment system is characterized in that it includes the following steps:

[0065] Step 1: Construction and installation of the odor gas collection and treatment system;

[0066] By shaping the soil covering of the intermediate or final covering layer of the fly ash landfill, a semi-circular ditch is excavated on the surface of the soil covering layer. At the bottom of the ditch, a yellow sand cushion layer d and a gravel layer c are laid from bottom to top in sequence to form the main body of the ditch.

[0067] A wire mesh skeleton b and a geomembrane a are laid in sequence above the main body of the ditch to form a closed odor collection ditch.

[0068] According to the construction method of the above-mentioned odor collection ditch, odor collection branch ditches 1 are arranged at a certain interval on the surface of the fly ash landfill, and an odor collection main ditch is constructed; all the odor collection branch ditches 1 are connected by an odor collection main ditch 2.

[0069] Among them, the construction method of the odor collection main ditch 2 is the same as that of the odor collection branch ditch.

[0070] The odor collection main ditch 2 extends in the direction of the odor treatment system, and the area beyond the landfill is changed to be connected by a pipeline 3; finally, a complete fly ash landfill odor collection system is formed.

[0071] Step two: Operation of the fly ash landfill odor treatment system.

[0072] The odor collected by the odor collection branch ditch 1 is collected through the odor collection main ditch 2, and then sent into the fly ash landfill odor treatment system through the odor transmission pipe 3; the pollutants in the odor entering the plasma reaction tower 4 of the fly ash landfill odor treatment system are fully decomposed into substances such as H2O, CO2, SO2, NO2, and N2O5 under the action of plasma, so as to achieve deodorization.

[0073] The waste gas discharged from the plasma reaction tower 4 enters the spray tower 5. After being washed by the alkali solution sprayed by the spray tower 5, the pollutants in the waste gas are effectively removed, and finally discharged through the deodorization fan 6 and the exhaust pipe 7.

[0074] Furthermore, the alkali solution of the spray tower 5 is supplied by the alkali solution circulation pump in the alkali solution storage tank 5-2. The alkali solution is sent to the alkali solution spraying device 5-1 to be atomized and then contacts and reacts with the waste gas in the spray tower; the reacted liquid falls to the bottom of the spray tower and finally converges into the alkali solution storage tank 5-2, and is recycled under the action of the alkali solution circulation pump. The alkali solution in the alkali solution storage tank 5-2 needs to be replaced regularly to ensure the effectiveness of the alkali solution.

[0075] In order to more clearly illustrate the advantages of the fly ash landfill odor collection and treatment system and the collection and treatment method described in the present invention compared with the prior art, the staff compared these two technical solutions, and the comparison results are as follows in the table:

[0076]

[0077] As can be seen from the above: Compared with the prior art, the odor collection and treatment system and the collection and treatment method of the fly ash landfill described in the present invention have low construction costs, good deodorization effects, and high pollutant removal efficiencies.

[0078] Embodiment

[0079] This embodiment includes an odor collection and treatment system and a fly ash landfill odor treatment system.

[0080] In this embodiment, the main odor collection trench 2 is connected to the middle parts of a plurality of odor collection branch trenches 1;

[0081] The usage method of this embodiment includes the following steps:

[0082] Step 1: Construction and installation of the odor collection and treatment system;

[0083] By shaping the soil covering the intermediate or final covering layer of the fly ash landfill, a semi-circular trench is excavated on the surface of the soil covering layer. At the bottom of the trench, a 50-mm yellow sand cushion layer d and a 50-mm gravel layer c are laid from bottom to top in sequence to form the main body of the trench; A wire mesh skeleton b and an HDPE geomembrane are laid in sequence above the trench to form a closed odor collection trench, and its structure is as Figure 3 shown; According to the above method, odor collection branch trenches 1 are arranged on the surface of the fly ash landfill at certain intervals, and all the odor collection branch trenches 1 are connected by using a main odor collection trench 2, specifically as Figure 2 shown; The main odor collection trench 2 extends in the direction of the odor treatment system. In the area beyond the landfill, it is replaced by a pipeline 3 for connection. Finally, a complete odor collection system is formed;

[0084] The odor treatment system arranged on one side of the fly ash landfill is composed of a plasma reaction tower 4, a spray tower 5, an anti-corrosion fan 6, and an exhaust stack 7 connected in series, as Figure 4 shown; The main equipment of the plasma reaction tower 4 is composed of a new type of plasma narrow pulse high-voltage power supply 4-1 and a plasma generator 4-2; The spray tower 5 is mainly composed of an alkali liquid spraying device 5-1, an alkali liquid storage tank 5-2, and a demister 5-3. An alkali liquid circulation pump is arranged in the alkali liquid storage tank 5-2; The anti-corrosion fan 6 is connected in series behind the spray tower 5 to provide power for the odor collection and treatment system; An exhaust stack 7 is arranged behind the anti-corrosion fan 6 to achieve the high-altitude emission of waste gas;

[0085] Step 2: Operation of the fly ash landfill odor treatment system;

[0086] The odors collected by the odor collection branch ditch 1 are gathered through the odor collection main ditch 2 and then sent into the odor treatment system through the odor delivery pipe 3. The pollutants in the odors entering the plasma reaction tower 4 are fully decomposed into substances such as H2O, CO2, SO2, NO2, and N2O5 under the action of the plasma, thus achieving odor removal. The waste gas discharged from the plasma reaction tower 4 enters the spray tower 5. After being washed with the alkaline solution, the pollutants in the waste gas are effectively removed and finally discharged through the deodorizing fan 6 and the exhaust stack 7;

[0087] The alkaline solution in the spray tower 5 is supplied by the alkaline solution circulation pump in the alkaline solution storage tank 5-2. After being sent to the alkaline solution spraying device 5-1 for atomization, it contacts and reacts with the waste gas in the tower. The reacted liquid falls to the bottom of the spray tower and finally converges into the alkaline solution storage tank 5-2, and is recycled under the action of the alkaline solution circulation pump. The alkaline solution in the alkaline solution storage tank 5-2 needs to be replaced regularly to ensure the effectiveness of the alkaline solution.

[0088] Conclusion: This embodiment has low construction cost, good odor removal effect, and high pollutant removal efficiency.

[0089] As described above, it is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

[0090] Other parts not described are all prior arts.

Claims

1. An odor collection and treatment system for a fly ash landfill, characterized in that: It includes an odor collection system for the fly ash landfill and an odor treatment system for the fly ash landfill; The odor collection system for the fly ash landfill is connected to the odor treatment system for the fly ash landfill; The odor collection system for the fly ash landfill includes an odor collection trench and an odor delivery pipe (3); the odor collection trench is connected to the odor delivery pipe (3); The odor treatment system for the fly ash landfill includes a plasma reaction tower (4), a spray tower (5) and an anti-corrosion fan (6); the plasma reaction tower (4), the spray tower (5) and the anti-corrosion fan (6) are connected in series in sequence; the anti-corrosion fan (6) is connected to an exhaust stack (7); The odor collection trench includes a trench main body, a wire mesh skeleton (b) and a geomembrane (a); the trench main body includes a semi-circular trench, a yellow sand cushion layer (d) and a gravel layer (c); the yellow sand cushion layer (d) and the gravel layer (c) are laid on the semi-circular trench from bottom to top in sequence; The wire mesh skeleton (b) and the geomembrane (a) are laid on the trench main body from bottom to top in sequence; The odor collection trench includes an odor collection branch trench (1) and an odor collection main trench (2); Both the odor collection branch trench (1) and the odor collection main trench (2) are arranged on the fly ash landfill; There are multiple odor collection branch trenches (1), and the multiple odor collection branch trenches (1) are arranged at intervals; the odor collection main trench (2) is respectively connected to the multiple odor collection branch trenches (1); The odor collection main trench (2) is connected to the odor delivery pipe (3); The odor delivery pipe (3) is connected to the plasma reaction tower (4); The plasma reaction tower (4) includes a plasma narrow pulse high voltage power supply (4-1) and a plasma generator (4-2); the plasma narrow pulse high voltage power supply (4-1) is connected to the plasma generator (4-2); The odor collected by the odor collection branch trench (1) is collected through the odor collection main trench (2), and then sent into the odor treatment system for the fly ash landfill through the odor delivery pipe (3); The pollutants in the odor entering the plasma reaction tower (4) of the odor treatment system for the fly ash landfill are fully decomposed into H2O, CO2, SO2, NO2 and N2O5 under the action of plasma, thus achieving deodorization; The waste gas discharged from the plasma reaction tower (4) enters the spray tower (5), and after being washed by the alkaline liquid sprayed by the spray tower (5), the pollutants in the waste gas are effectively removed, and finally discharged through the anti-corrosion fan (6) and the exhaust stack (7); The geomembrane (a) is an HDPE geomembrane.

2. The odor collection and treatment system for fly ash landfill as claimed in claim 1, wherein: The spray tower (5) includes a spray tower housing, an alkaline liquid spraying device (5-1), an alkaline liquid storage tank (5-2) and a demister (5-3); There are multiple alkaline liquid spraying devices (5-1), and the multiple alkaline liquid spraying devices (5-1) are arranged at intervals in the spray tower housing; the demister (5-3) is arranged at the upper end of the spray tower housing and above the alkaline liquid spraying device (5-1); The alkaline liquid storage tank (5-2) is arranged outside the spray tower housing; the multiple alkaline liquid spraying devices (5-1) are all connected to the alkaline liquid storage tank (5-2); An alkaline liquid circulation pump is arranged in the alkaline liquid storage tank (5-2).

3. The odor collection and treatment method of the odor collection and treatment system for fly ash landfill described in any one of claims 1-2, characterized in that: It includes the following steps: Step 1: Construction and installation of the odor collection and treatment system; The soil covering the intermediate cover or final cover layer of the fly ash landfill is shaped, a semicircular ditch is excavated on the surface of the cover layer, and a yellow sand cushion layer (d) and a crushed stone layer (c) are laid from bottom to top at the bottom of the ditch to form the main body of the ditch; A wire mesh frame (b) and a geomembrane (a) are laid in sequence above the main body of the ditch to form a closed odor collection ditch; According to the above-mentioned method for constructing the odor collection trench, odor collection branch trenches (1) are arranged at certain intervals on the surface of the fly ash landfill, and an odor collection main trench (2) is constructed; all the odor collection branch trenches (1) are connected through one odor collection main trench (2); The odor collection main ditch (2) extends in the direction of the odor treatment system, and the area beyond the landfill is replaced with an odor delivery pipe (3) for connection; finally, a complete fly ash landfill odor collection system is formed; Step 2: Operation of fly ash landfill odor treatment system; The odor collected by the odor collecting branch ditch (1) is collected by the odor collecting main ditch (2), and then sent to the fly ash landfill odor treatment system through the odor conveying pipe (3); The pollutants in the odor entering the plasma reaction tower (4) of the fly ash landfill odor treatment system are fully decomposed into H2O, CO2, SO2, NO2 and N2O5 under the action of plasma, thereby achieving deodorization; The waste gas discharged from the plasma reaction tower (4) enters the spray tower (5), and after being washed by the alkaline solution sprayed from the spray tower (5), the pollutants in the waste gas are effectively removed, and finally discharged through the anti-corrosion fan (6) and the exhaust pipe (7).

4. The odor collection and treatment method of the odor collection and treatment system for fly ash landfill, according to claim 3, characterized in that: The alkali solution of the spray tower (5) is supplied by the alkali solution circulation pump in the alkali solution storage tank (5-2). The alkali solution is sent to the alkali solution spray device (5-1) for atomization and then contacts and reacts with the exhaust gas in the spray tower (5). The liquid after the reaction falls to the bottom of the spray tower and is finally collected in the alkali solution storage tank (5-2) and circulated under the action of the alkali solution circulation pump.

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