A harmless smoke purification structure for household garbage incineration fly ash

Abstract

The utility model relates to a kind of domestic waste incineration fly ash harmless flue gas purification structure technical field, and disclose a kind of domestic waste incineration fly ash harmless flue gas purification structure, including flue gas treatment cylinder, the lower end inboard surface of the flue gas treatment cylinder is provided with processing liquid cavity, the upper end inboard surface of the flue gas treatment cylinder is fixedly connected with flue gas inlet pipe, the outer surface of the flue gas inlet pipe is fixedly connected with gas distribution disc, the outer end surface of the gas distribution disc is fixedly connected in the inboard surface of flue gas treatment cylinder, the surface of gas distribution disc is provided with flue gas shunt hole, the upper end inboard surface of flue gas treatment cylinder is provided with water guide ring cavity, the inboard surface of the water guide ring cavity of flue gas treatment cylinder is provided with spray nozzle, flue gas treatment is uniformly comprehensive efficiency high, and when discharging, gas humidity is high, can be along the outer wall of high-temperature flue gas inlet pipe rise, in the process of rising, heat vapor evaporates, directly reduces processing humidity when discharging, its efficiency is high, cost is high, and drying equipment does not need to be used separately.

Description

Technical Field

[0001] This utility model relates to the technical field of harmless flue gas purification structure for fly ash from municipal solid waste incineration, specifically a harmless flue gas purification structure for fly ash from municipal solid waste incineration. Background Technology

[0002] A large amount of fly ash is generated during the incineration of municipal solid waste. Fly ash is the product of the flue gas purification system of municipal solid waste incineration plants and the sediment at the bottom of the flue and chimney. It contains dioxins, heavy metals (Pb, Zn, Cr, etc.) and soluble chloride salts (8-25%). According to the "Standard for Pollution Control of Municipal Solid Waste Incineration" (GB18485-2014), it is classified as hazardous waste (waste code 77200218). Fly ash must be stabilized and solidified to meet the standards of GB16889 or GB30485 before it can be disposed of in landfills or cement kilns. Simple disposal or discharge is prohibited. In my country, fly ash is mainly disposed of through chelation solidification + landfill. However, due to the high temperature of the flue gas during incineration, fly ash treatment is inconvenient. In its initial processing, existing technologies, such as the authorized announcement number CN215996190U, relate to the field of flue gas treatment technology, and in particular to a device for purifying harmless flue gas from incineration fly ash; it includes a gas-liquid mixing device and a secondary alkaline washing device. The gas-liquid mixing device includes a shell, and the interior of the shell is provided with a gas-liquid mixing chamber. The gas-liquid mixing chamber includes several branch pipes and a straight pipe. Adjacent two branch pipes are connected by a straight pipe. This invention utilizes a gas-liquid mixing device to enable acidic flue gas and alkaline solution to react fully in the gas-liquid mixing device first, so that the speed and direction of the gas-liquid fluid change continuously during the flow in the gas-liquid mixing chamber, which can effectively increase the contact time and contact area between the alkaline solution and the acidic flue gas, thereby effectively improving the purification effect. Subsequently, it enters the purification box through a conduit for wet purification again. The purified flue gas enters the dryer through the outlet pipe for drying treatment to avoid excessive water content in the discharged flue gas. In the aforementioned patent, a mixed gas is used to mix and react acidic flue gas and alkaline liquid for treatment. However, during the treatment, the flue gas and alkaline liquid are not mixed evenly, making it impossible to effectively mix and treat. Furthermore, when the flue gas enters the treatment process, the flue gas distribution is uneven, and a separate dryer is required for drying the flue gas after treatment, resulting in high cost and low efficiency. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a structure for purifying harmless flue gas from fly ash incineration of municipal solid waste. This structure solves the problem of uneven mixing of flue gas and alkaline liquid due to uneven flue gas distribution, which prevents effective mixing and treatment. It also addresses the issues of complex and inefficient gas emission from using a dryer.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a structure for harmless flue gas purification of fly ash from municipal solid waste incineration, comprising a flue gas treatment cylinder, a treatment liquid chamber provided on the inner surface of the lower end of the flue gas treatment cylinder, a flue gas inlet pipe fixedly connected to the inner surface of the upper end of the flue gas treatment cylinder, a gas diffuser plate fixedly connected to the outer surface of the flue gas inlet pipe, the outer end surface of the gas diffuser plate fixedly connected to the inner surface of the flue gas treatment cylinder, flue gas diversion holes opened on the surface of the gas diffuser plate, a water guiding ring cavity provided on the inner surface of the upper end of the flue gas treatment cylinder, a spray nozzle provided on the inner surface of the water guiding ring cavity of the flue gas treatment cylinder, a suction pump provided at the upper end of the flue gas treatment cylinder, a lower end guide pipe port of the suction pump fixedly connected to the inner surface of the upper end water guiding ring cavity of the flue gas treatment cylinder, a suction pipe provided on the outer side of the suction pump, and the lower end of the suction pipe fixedly connected to the inner surface of the treatment liquid chamber of the flue gas treatment cylinder.

[0005] Preferably, the spray nozzles are obliquely distributed on the inner surface of the water guiding ring cavity, and the spray nozzles are evenly distributed on one ring of the inner surface of the water guiding ring cavity.

[0006] Preferably, an exhaust tube is fixedly connected to the upper outer surface of the flue gas inlet pipe, and an exhaust port is provided at the upper end of the exhaust tube.

[0007] Preferably, the outer surface of the outlet tube is fixedly connected to the inner surface of the flue gas treatment tube, and the bottom of the outlet tube extends outward from the upper inner surface of the flue gas treatment tube.

[0008] Preferably, the upper inner surface of the treatment liquid chamber of the flue gas treatment cylinder is provided with a liquid inlet.

[0009] Preferably, the lower inner surface of the treatment liquid chamber of the flue gas treatment cylinder is provided with a liquid outlet.

[0010] Preferably, the flue gas diversion holes adopt a small round hole structure, and the flue gas diversion holes are evenly and densely distributed on the surface of the gas distribution plate.

[0011] Compared with the prior art, this utility model provides a structure for purifying harmless flue gas from fly ash incineration of municipal solid waste, which has the following beneficial effects: By using a vertically descending flue gas inlet pipe, the flue gas is directly introduced into the bottom treatment liquid chamber, and the fly ash is directly immersed in the water. Then, the gas is dispersed and distributed through the gas diffuser plate. The top is combined with spray treatment, so the flue gas treatment is uniform, comprehensive and efficient. When the gas is discharged, the humidity is high, and it can rise along the outer wall of the high-heat flue gas inlet pipe. During the rising process, the heat evaporates the water vapor, and the humidity is directly reduced when discharged. It is highly efficient but costly, and does not require the use of separate drying equipment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure; Figure 2 This is a schematic diagram of the first cross-section of the overall structure; Figure 3 This is a schematic diagram of the second cross-section of the overall structure; Figure 4 This is a schematic diagram of a partial structure of the air diffuser plate; Figure 5 This is an enlarged view of point A.

[0013] In the diagram: 1. Flue gas treatment cylinder, 2. Treatment liquid chamber, 3. Flue gas inlet pipe, 4. Gas diffuser plate, 5. Flue gas diversion hole, 6. Water guide ring cavity, 7. Spray nozzle, 8. Suction pump, 9. Guide pipe port, 10. Suction pipe, 11. Outlet cylinder, 12. Exhaust port, 13. Liquid inlet pipe port, 14. Liquid outlet pipe port. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] This utility model provides a technical solution: a structure for purifying harmless flue gas from fly ash of municipal solid waste incineration, comprising a flue gas treatment cylinder 1, a treatment liquid chamber 2 provided on the inner surface of the lower end of the flue gas treatment cylinder 1, a flue gas inlet pipe 3 fixedly connected to the inner surface of the upper end of the flue gas treatment cylinder 1, a gas diffuser plate 4 fixedly connected to the outer surface of the flue gas inlet pipe 3, the outer end surface of the gas diffuser plate 4 fixedly connected to the inner surface of the flue gas treatment cylinder 1, flue gas diversion holes 5 opened on the surface of the gas diffuser plate 4, a water guiding ring cavity 6 provided on the inner surface of the upper end of the flue gas treatment cylinder 1, a spray nozzle 7 provided on the inner surface of the water guiding ring cavity 6 of the flue gas treatment cylinder 1, and a suction pump 8 provided at the upper end of the flue gas treatment cylinder 1. The lower end of the guide pipe 9 is fixedly connected to the inner surface of the upper end water guide ring cavity 6 of the flue gas treatment cylinder 1. A suction pipe 10 is provided on the outside of the suction pump 8, and the lower end of the suction pipe 10 is fixedly connected to the inner surface of the treatment liquid cavity 2 of the flue gas treatment cylinder 1. By using a vertically descending flue gas inlet pipe, the flue gas is directly introduced into the bottom treatment liquid cavity, and the fly ash is directly immersed in water. Then, the gas is dispersed and distributed through the gas diffuser. The top is combined with spray treatment, so the flue gas treatment is uniform, comprehensive and efficient. When it is discharged, the gas humidity is high and it can rise along the outer wall of the high-heat flue gas inlet pipe. During the rising process, the heat evaporates the water vapor, and the treatment humidity is directly reduced when it is discharged. It is efficient but costly and does not require separate drying equipment. The spray nozzles 7 are inclinedly distributed on the inner surface of the water guiding ring cavity 6, and the spray nozzles 7 are evenly distributed on the inner surface of the water guiding ring cavity 6; the distribution is uniform, and the spraying is even and comprehensive when the distribution is in a ring, which can spray and mix the flue gas. An outlet cylinder 11 is fixedly connected to the upper outer surface of the flue gas inlet pipe 3, and an exhaust port 12 is provided at the upper end of the outlet cylinder 11 for easy exhaust. The gas after flue gas treatment can be discharged from the exhaust port 12 at the outlet cylinder 11. The outer surface of the outlet cylinder 11 is fixedly connected to the inner surface of the flue gas treatment cylinder 1, and the bottom of the outlet cylinder 11 opens and extends to the upper inner surface of the flue gas treatment cylinder 1. When the outlet cylinder 11 is discharged, the flue gas can rise and be discharged along the outer wall of the flue gas inlet pipe 3. The flue gas in the flue gas inlet pipe 3 is at a high temperature and high heat, and the outer wall can evaporate the high humidity gas, which can perform humidity treatment. No drying equipment is required, which is low in cost and convenient for discharge. An inlet pipe 13 is provided on the inner surface of the upper end of the treatment liquid chamber 2 of the flue gas treatment cylinder 1 to facilitate the introduction of alkaline solution; an outlet pipe 14 is provided on the inner surface of the lower end of the treatment liquid chamber 2 of the flue gas treatment cylinder 1 to facilitate the discharge of the treated alkaline liquid. The flue gas diversion hole 5 adopts a small round hole structure, and the flue gas diversion hole 5 is evenly and densely distributed on the surface of the gas distribution plate 4; the distribution is uniform, and the flue gas is conveniently and evenly discharged when it rises. The working principle of this device is as follows: When in use, a flue gas inlet pipe 3 is fixedly connected to the inner surface of the upper end of the flue gas treatment cylinder 1. The flue gas is directly introduced into the bottom treatment liquid chamber 2 through the vertically descending flue gas inlet pipe 3. The fly ash is directly immersed in the water, and the flue gas is initially filtered. A gas distribution plate 4 is fixedly connected to the outer surface of the flue gas inlet pipe 3. The outer end surface of the gas distribution plate 4 is fixedly connected to the inner surface of the flue gas treatment cylinder 1. When the flue gas rises, a flue gas diversion hole 5 is opened on the surface of the gas distribution plate 4, which can evenly distribute the gas as it rises. The flue gas treatment cylinder 1 has a spray nozzle 7 installed on the inner surface of the water guide ring cavity 6. A suction pump 8 is installed at the upper end of the flue gas treatment cylinder 1. The lower end of the suction pump 8, the guide pipe 9, is fixedly connected to the inner surface of the water guide ring cavity 6 at the upper end of the flue gas treatment cylinder 1. The lower end of the outer suction pipe 10 of the suction pump 8 is fixedly connected to the inner surface of the treatment liquid cavity 2 of the flue gas treatment cylinder 1. The alkaline solution at the bottom is drawn by the suction pump 8 and can be discharged through the guide pipe 9, through the water guide ring cavity 8, and sprayed out through the spray nozzle 7, allowing for uniform mixing with the flue gas. The solution is fixed on the upper outer surface of the flue gas inlet pipe 3. A discharge tube 11 is connected, and an exhaust port 12 is provided at the upper end of the discharge tube 11. The gas after flue gas treatment can be discharged from the exhaust port 12 at the discharge tube 11. The outer surface of the discharge tube 11 is fixedly connected to the inner surface of the flue gas treatment tube 1, and the bottom of the discharge tube 11 opens and extends to the upper inner surface of the flue gas treatment tube 1. When the discharge tube 11 discharges, the flue gas can rise and be discharged along the outer wall of the flue gas inlet pipe 3. The flue gas in the flue gas inlet pipe 3 is at a high temperature and high heat, and the outer wall can evaporate the high humidity gas, which can perform humidity treatment. No drying equipment is required, which is low in cost and convenient for discharge.

[0016] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0017] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A structure for purifying harmless flue gas from fly ash incineration of municipal solid waste, comprising a flue gas treatment cylinder (1), characterized in that: The lower inner surface of the flue gas treatment cylinder (1) is provided with a treatment liquid chamber (2), the upper inner surface of the flue gas treatment cylinder (1) is fixedly connected with a flue gas inlet pipe (3), the outer surface of the flue gas inlet pipe (3) is fixedly connected with a gas diffuser plate (4), the outer end surface of the gas diffuser plate (4) is fixedly connected to the inner surface of the flue gas treatment cylinder (1), the surface of the gas diffuser plate (4) is provided with a flue gas diversion hole (5), and the upper inner surface of the flue gas treatment cylinder (1) is provided with a water guiding ring cavity (6). A spray nozzle (7) is provided on the inner surface of the water guide ring cavity (6) of the flue gas treatment cylinder (1). A suction pump (8) is provided at the upper end of the flue gas treatment cylinder (1). The lower end guide pipe (9) of the suction pump (8) is fixedly connected to the inner surface of the water guide ring cavity (6) at the upper end of the flue gas treatment cylinder (1). A suction pipe (10) is provided on the outer side of the suction pump (8). The lower end of the suction pipe (10) is fixedly connected to the inner surface of the treatment liquid cavity (2) of the flue gas treatment cylinder (1).

2. The structure for purifying harmless flue gas from fly ash of municipal solid waste incineration according to claim 1, characterized in that: The spray nozzles (7) are inclinedly distributed on the inner surface of the water guiding ring cavity (6), and the spray nozzles (7) are evenly distributed on one ring of the inner surface of the water guiding ring cavity (6).

3. The structure for purifying harmless flue gas from fly ash of municipal solid waste incineration according to claim 1, characterized in that: The upper outer surface of the flue gas inlet pipe (3) is fixedly connected to an outlet cylinder (11), and an exhaust port (12) is provided at the upper end of the outlet cylinder (11).

4. The structure for purifying harmless flue gas from fly ash of municipal solid waste incineration according to claim 3, characterized in that: The outer surface of the outlet tube (11) is fixedly connected to the inner surface of the flue gas treatment tube (1), and the bottom of the outlet tube (11) extends to the upper inner surface of the flue gas treatment tube (1).

5. The structure for purifying harmless flue gas from fly ash of municipal solid waste incineration according to claim 1, characterized in that: The upper inner surface of the treatment liquid chamber (2) of the flue gas treatment cylinder (1) is provided with a liquid inlet (13).

6. The structure for purifying harmless flue gas from fly ash of municipal solid waste incineration according to claim 1, characterized in that: The lower inner surface of the treatment liquid chamber (2) of the flue gas treatment cylinder (1) is provided with a liquid outlet (14).

7. The structure for purifying harmless flue gas from fly ash of municipal solid waste incineration according to claim 1, characterized in that: The flue gas diversion hole (5) adopts a small round hole structure, and the flue gas diversion hole (5) is evenly and densely distributed on the surface of the gas distribution plate (4).

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