Household garbage incineration fly ash treatment device

Abstract

The utility model discloses a household garbage incineration fly ash treatment device which comprises an outer pipe arranged on the outer side of a calandria in a sleeving mode, an ash collecting cover is fixedly installed at the end of the outer pipe, a gathering opening communicated with the calandria is formed in an end opening of the ash collecting cover, and a lower plate and an upper plate which are arranged in parallel are fixedly installed in the ash collecting cover. According to the household garbage incineration fly ash treatment device provided by the utility model, heat carried by fly ash discharged from the discharge pipe is absorbed by water in the liquid ring channel and enters the evaporation cavity, so that heated steam enters the mixing cavity, and the steam has a denser effect compared with sprayed water drops; by means of the structure, the effect of mixing steam and carrying fly ash is stronger, meanwhile, the activity rate of steam water molecules floating at high temperature is higher, the impact adsorption capacity on fine fly ash particles is improved, small fly ash and dust particles are not prone to escaping from gaps between water vapor, the problem of pollutant leakage is greatly solved, and the fly ash treatment efficiency is higher.

Description

Technical Field

[0001] This utility model relates to the technical field of municipal solid waste treatment equipment, specifically to a municipal solid waste incineration fly ash treatment device. Background Technology

[0002] Municipal solid waste is usually incinerated, and the heat generated from the incineration is used to generate electricity in power plants, thus achieving resource recycling.

[0003] According to the publication (announcement) number: CN117531814A, the publication (announcement) date: 2024-02-09, a pretreatment device for fly ash from municipal solid waste incineration is disclosed.

[0004] In the prior art, including the aforementioned patent, the fly ash produced after waste incineration mostly contains environmental pollutants. Therefore, it is necessary to collect and treat the fly ash before absorbing and treating the exhaust gas to meet emission standards. However, the treatment of fly ash usually involves mixing it with a spray system, using the sprayed water mist to adhere to the fly ash and reduce ash concentration. However, some smaller fly ash or dust particles cannot be directly adsorbed by the water mist, and the reabsorption capacity of the water mist with fly ash attached will be reduced. The spacing between water droplets will also increase accordingly, allowing smaller fly ash and dust particles to escape from the gaps, still causing some pollutant leakage. The treatment efficiency is low, and the emissions do not meet the standards. Utility Model Content

[0005] The purpose of this invention is to provide a device for treating fly ash from municipal solid waste incineration, which aims to solve the problems mentioned above.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A fly ash treatment device for municipal solid waste incineration includes an equipment end with a pipe and an outer pipe sleeved outside the pipe. An ash collection hood is fixedly installed at the end of the outer pipe, and the port of the ash collection hood is provided with a collection port communicating with the pipe.

[0008] The ash collection hood has a lower plate and an upper plate arranged in parallel, and a mixing chamber is formed between the two plates. The gathering port cooperates with the side wall of the ash collection hood to form an evaporation chamber that communicates with the mixing chamber.

[0009] The outer tube and the drain tube form a liquid loop that connects to the evaporation chamber.

[0010] Preferably, the dust collection hood maintains a predetermined angle with the horizontal plane, and the mixing chamber is inclined and connected to a discharge port at a low position.

[0011] Preferably, a plurality of lower platform rings are fixedly installed on the lower plate, and an upper platform ring with its port facing the lower platform ring and arranged in a staggered manner is fixedly installed on the upper plate.

[0012] Preferably, the inner wall of the ash collection hood is fixedly installed with a clamping ring that cooperates with the mixing chamber.

[0013] Preferably, the upper plate is provided with a rotating shaft, and an impeller rotating in the mixing chamber is fixedly installed at the end of the rotating shaft.

[0014] Preferably, a brush rod that rubs and slides against the end face of the upper plate is fixedly installed at the other end of the rotating shaft.

[0015] In the above technical solution, the fly ash treatment device for municipal solid waste incineration provided by this utility model has the following beneficial effects: fly ash is discharged from the collection port into the mixing chamber through the discharge pipe, and the water entering the liquid ring channel absorbs the heat carried by the fly ash in the discharge pipe, so that the water entering the evaporation chamber is heated until the water vapor generated during the heating process enters the mixing chamber to mix with the fly ash. The steam has a more concentrated effect than the water droplets sprayed out, so that the steam mixing and carrying effect of fly ash is stronger. At the same time, the steam water molecules floating at high temperature have a higher activity rate and improve the impact and adsorption capacity of fine fly ash particles, so that smaller fly ash and dust particles are not easy to escape from the gaps between water vapor, greatly reducing the problem of pollutant leakage and making the fly ash treatment efficiency higher. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the assembly of the tail pipe of the incineration equipment and the outer pipe and ash collection hood fixed on the outside of the pipe, provided for an embodiment of this utility model;

[0018] Figure 2 A side sectional view of the pipe and the outer pipe and dust collection cover fixed on the outside of the pipe provided in this embodiment of the utility model;

[0019] Figure 3 for Figure 2 Enlarged view of point A;

[0020] Figure 4 This is a side cross-sectional view of part of the pipe and outer pipe and the dust collection cover provided in the embodiment of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Equipment end; 11. Pipeline; 2. Outer pipe; 21. Liquid ring channel; 3. Ash collection hood; 31. Gathering port; 32. Lower plate; 321. Lower platform ring; 33. Upper plate; 331. Upper platform ring; 34. Evaporation chamber; 35. Mixing chamber; 36. Clamping ring; 37. Discharge port; 4. Rotating shaft; 41. Impeller; 42. Brush rod. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] like Figure 1-4 As shown, a fly ash treatment device for municipal solid waste incineration includes an equipment end 1 with a pipe 11 and an outer pipe 2 sleeved outside the pipe 11. An ash collection hood 3 is fixedly installed at the end of the outer pipe 2, and the port of the ash collection hood 3 is provided with a gathering port 31 connected to the pipe 11.

[0025] The ash collection hood 3 has a lower plate 32 and an upper plate 33 arranged in parallel, and a mixing chamber 35 is formed between the two plates. The gathering port 31 cooperates with the side wall of the ash collection hood 3 to form an evaporation chamber 34 connected to the mixing chamber 35.

[0026] A liquid ring channel 21 is formed between the outer tube 2 and the drain pipe 11, which is connected to the evaporation chamber 34.

[0027] Specifically, equipment end 1 is the tail end of the incineration equipment, which uses pipe 11 to discharge fly ash. The components themselves are all existing technologies and will not be described in detail here. The outer pipe 2 and pipe 11 are both "V" shaped, and the side of the outer pipe 2 closest to equipment end 1 is connected to a water inlet pipe, and pressurized water flows in the water inlet pipe. The water and the pressurization method are existing technologies and will not be described in detail here.

[0028] Furthermore, the fly ash discharged from the pipe 11 typically has a temperature of around 850-1000℃, which can cause the water in the evaporation chamber 34 to be heated and evaporated, generating steam that enters the mixing chamber 35. The end of the ash collection hood 3 is provided with a circumferentially arranged through hole that connects the evaporation chamber 34 and the liquid ring channel 21. Under the closing action of the gathering port 31, more heat is adsorbed on the side wall of the gathering port 31, and the water in the evaporation chamber 34 is heated to a higher temperature, thus ensuring the generation of steam.

[0029] Furthermore, both the ash collection hood 3 and the outer pipe 2 are equipped with heat insulation layers made of existing technology, which will not be described in detail here. The V-shaped liquid ring channel 21 can have a larger heat absorption area, reduce heat waste, and improve resource recovery efficiency.

[0030] Fly ash is collected and discharged from the collection port 31 into the mixing chamber 35 through the discharge pipe 11. The water entering the liquid ring channel 21 absorbs the heat carried by the fly ash discharged through the discharge pipe 11, which heats the water entering the evaporation chamber 34. The water vapor generated during the heating process enters the mixing chamber 35 to mix with the fly ash. The steam has a more concentrated effect than the water droplets sprayed out, making the steam mixing and carrying effect of fly ash stronger. At the same time, the steam water molecules floating at high temperature have a higher activity rate and improve the impact and adsorption capacity of fine fly ash particles, making it difficult for smaller fly ash and dust particles to escape from the gaps between water vapor, greatly reducing the problem of pollutant leakage and making the fly ash treatment efficiency higher.

[0031] As a further embodiment of this utility model, the dust collection hood 3 maintains a predetermined angle with the horizontal plane, and the mixing chamber 35 is inclined and connected to the discharge port 37 at a low position.

[0032] Specifically, the V-shaped outer pipe 2 has its port in an inclined state, so the inclined ash collection hood 3 can automatically collect and absorb the wastewater of fly ash by utilizing the inclination angle. The discharge port 37 is fixedly installed on the side wall of the ash collection hood 3, and the pipe of the discharge port 37 is downward, and the wastewater discharged from the discharge port 37 is collected in a concentrated manner. The collection and pipe connection methods are existing technologies and will not be described in detail here.

[0033] The fly ash adsorbed by steam in the mixing chamber 35 is deposited downwards, and the wastewater is concentrated and poured out by the inclined lower plate 32, and collected and discharged at the outlet 37, and can be discharged under the action of gravity.

[0034] As another embodiment further provided by this utility model, a plurality of lower platform rings 321 are fixedly installed on the lower plate 32, and an upper platform ring 331 with its port facing the lower platform rings 321 and arranged in a staggered manner is fixedly installed on the upper plate 33.

[0035] Specifically, the upper plate 33 is the sealing plate on the upper end of the ash collection hood 3, and both the lower plate 32 and the upper plate 33 are provided with circumferentially arranged ventilation holes. The ventilation holes on the two are staggered to increase the residence time of fly ash in the mixing chamber 35, so that the treated air is not easily discharged directly from the upper plate 33.

[0036] Furthermore, the lower platform ring 321 and the upper platform ring 331 have frustum-shaped cross sections, with openings on the upper and lower end faces of the frustum, and the larger end of the frustum is connected to the vent.

[0037] By setting the smaller ports facing each other with the lower ring 321 and the upper ring 331, air leakage in the mixing chamber 35 is less likely, thereby increasing the residence time of fly ash in the mixing chamber 35, improving the mixing efficiency of steam and fly ash, and ensuring the emission compliance rate.

[0038] As another embodiment further provided by this utility model, a clamping ring 36 that cooperates with the mixing chamber 35 is fixedly installed on the inner wall of the dust collection hood 3.

[0039] Specifically, the clamping ring 36 has an annular recess, and an annular elastic metal ring is fixedly installed at both ends of the recess. The metal ring is coated with a corrosion-resistant and high-temperature resistant coating, and the coating material is existing technology.

[0040] By snapping the filter plates (plates or bagged connecting plates made of high-temperature and corrosion-resistant fiber materials, such as polyester fiber, polypropylene fiber, etc.) into the clamping ring 36, the filter plates can adsorb and treat residual pollutants in the discharged fly ash (there is already a special component for treating pollutants in equipment end 1, and this secondary use avoids residue), thereby improving the adsorption efficiency of fly ash.

[0041] As a further embodiment of this utility model, a rotating shaft 4 is provided on the upper plate 33, and an impeller 41 rotating in the mixing chamber 35 is fixedly installed at the end of the rotating shaft 4.

[0042] Specifically, a support plate is fixedly installed at the axis of the upper plate 33, and the rotating shaft 4 rotates on the support plate.

[0043] The hot airflow of fly ash discharged from the collection port 31 blows the impeller 41 to rotate, causing the rotating impeller 41 to agitate the fly ash in the mixing chamber 35, thereby increasing the mixing efficiency of fly ash and steam and improving the absorption effect of fly ash particles.

[0044] As another embodiment provided in this utility model, a brush rod 42 is fixedly installed at the other end of the rotating shaft 4, which rubs and slides against the end face of the upper plate 33.

[0045] Specifically, brush bristles that fit against the upper surface of the upper plate 33 are fixedly installed on the brush handle 42.

[0046] The rotating impeller 41 drives the rotating shaft 4 to rotate, and the brush rod 42 is driven to rotate on the upper end face of the upper plate 33. The bristles on the brush rod 42 brush the ventilation holes of multiple upper rings 331, and some of the discharged steam assists in cleaning the upper rings 331, preventing the upper rings 331 from becoming blocked and affecting the exhaust. At the same time, it also ensures the cooling effect generated by the contact between the upper end face of the upper plate 33 and the air, and prevents dirt from accumulating and affecting heat dissipation.

[0047] Working principle: Fly ash is collected and discharged from the collection port 31 into the mixing chamber 35 through the discharge pipe 11. The water entering the liquid ring channel 21 absorbs the heat carried by the fly ash discharged from the discharge pipe 11, so that the water entering the evaporation chamber 34 is heated. The water vapor generated during the heating process enters the mixing chamber 35 to mix with the fly ash. The steam has a more concentrated effect than the sprayed water droplets, so that the steam mixing and carrying effect of fly ash is stronger. At the same time, the steam water molecules under high temperature floating have a higher activity rate and improve the impact and adsorption capacity of fine fly ash particles, so that smaller fly ash and dust particles are not easy to escape from the gaps between water vapor.

[0048] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A waste incineration fly ash treatment device comprising a plant end (1) provided with a discharge pipe (11), characterized in that, It also includes an outer pipe (2) sleeved on the outside of the pipe (11), and a dust collection hood (3) is fixedly installed at the end of the outer pipe (2), and the dust collection hood (3) has a gathering port (31) connected to the pipe (11) at its port. The ash collection hood (3) is fixedly installed with a lower plate (32) and an upper plate (33) arranged in parallel, and a mixing cavity (35) is formed between the two plates. The gathering port (31) cooperates with the side wall of the ash collection hood (3) to form an evaporation cavity (34) connected to the mixing cavity (35). The outer tube (2) and the drain pipe (11) form a liquid ring channel (21) that connects to the evaporation chamber (34).

2. The household garbage incineration fly ash treatment device according to claim 1, characterized in that, The dust collection hood (3) maintains a predetermined angle with the horizontal plane, and the mixing chamber (35) is inclined and connected to the discharge port (37).

3. The household garbage incineration fly ash treatment device according to claim 1, characterized in that, Multiple lower platform rings (321) are fixedly installed on the lower plate (32), and an upper platform ring (331) with its port facing the lower platform ring (321) and arranged in a staggered manner is fixedly installed on the upper plate (33).

4. The household garbage incineration fly ash treatment device according to claim 1, characterized in that, The inner wall of the dust collection hood (3) is fixedly installed with a clamping ring (36) that cooperates with the mixing chamber (35).

5. The household garbage incineration fly ash treatment device according to claim 3, characterized in that, The upper plate (33) is provided with a rotating shaft (4), and an impeller (41) rotating in the mixing chamber (35) is fixedly installed at the end of the rotating shaft (4).

6. The household garbage incineration fly ash treatment device according to claim 5, characterized in that, The other end of the rotating shaft (4) is fixedly installed with a brush rod (42) that rubs and slides against the end face of the upper plate (33).

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