Waste incineration flue gas purification device

Abstract

The utility model discloses a waste incineration flue gas purification device which comprises a tower body, a dust removal cavity, a deacidification cavity and a gas purification cavity are sequentially arranged in the tower body from bottom to top, and a waste gas inlet communicated with the dust removal cavity and a purified gas outlet communicated with the gas purification cavity are respectively arranged on the tower body. The tower body is provided with a first blowing assembly for blowing adsorption particles into the dust removal cavity and a second blowing assembly for blowing alkaline particles into the deacidification cavity. According to the utility model, the dust removal cavity and the deacidification cavity are arranged in one tower body, and the flue gas is guided to fully react in sequence by blowing the adsorption particles and the alkaline particles so as to achieve the dust removal and deacidification effects, so that the structure and the treatment flow are simplified, and the energy consumption is reduced. By arranging the two stages of cloth bags, particulate matters in the flue gas are adsorbed and filtered, and the content of the particulate matters in the flue gas is also greatly controlled under the effect of ensuring that pollutants are removed as much as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of waste incineration pollutant treatment, in particular to a waste incineration fume purification device. Background Art

[0002] The flue gas generated by the incineration of garbage and waste contains a large amount of pollutants, mainly dioxins, heavy metals and hydrogen chloride. Such flue gas needs to undergo qualified purification treatment before it can be discharged into the atmosphere.

[0003] The commonly used method is to remove particulate matter in the flue gas from garbage incineration through bag dust removal equipment, which also has a certain removal ability for dioxins and heavy metals in the flue gas. The removal method of acidic gases such as hydrogen chloride is to fully react alkaline substances with the flue gas.

[0004] The traditional waste incineration flue gas treatment process usually connects bag dust removal equipment and semi-dry towers. After dioxins and heavy metals are removed at the bag, the flue gas enters the semi-dry tower for deacidification. It requires the use of many equipments and the treatment process is cumbersome. Therefore, it has the problems of high energy consumption and environmental pollution. In addition, it is affected by the bag filtering performance and changes in operating conditions, and pollutants are prone to reduced removal efficiency and excessive emissions. Utility Model Content

[0005] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the utility model is to provide a waste incineration flue gas purification device to integrate and simplify the flue gas purification process and equipment, reduce energy consumption and ensure removal efficiency.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A waste incineration flue gas purification device comprises a tower body, wherein a dust removal chamber, a deacidification chamber and a clean air chamber are sequentially arranged in the tower body from bottom to top, and an exhaust gas inlet connected to the dust removal chamber and a clean air outlet connected to the clean air chamber are respectively arranged on the tower body, and a first blowing assembly for blowing adsorbed particles into the dust removal chamber and a second blowing assembly for blowing alkaline particles into the deacidification chamber are arranged on the tower body; a first cloth bag is arranged in the dust removal chamber, and an opening of the first cloth bag is located in the deacidification chamber, and a second cloth bag is arranged in the deacidification chamber, and an opening of the second cloth bag is located in the clean air chamber; a connected ash discharge trough is arranged between the dust removal chamber and the deacidification chamber, and an opening and closing structure for opening and closing the ash discharge trough is also arranged in the dust removal chamber.

[0008] Compared with the prior art, the utility model has the following beneficial effects: a dust removal chamber and a deacidification chamber are arranged in one tower body, and the flue gas is guided to react fully in sequence by spraying adsorption particles and alkaline particles to achieve the effect of dust removal and deacidification, thereby simplifying the structure and processing flow and reducing energy consumption.

[0009] By setting up a double-stage bag, the flue gas is adsorbed and filtered for particulate matter, which greatly controls the content of particulate matter in the flue gas while ensuring that all pollutants are removed.

[0010] By setting up the ash discharge chute and the opening and closing structure, the particulate matter and bag ash generated during the pollutant removal work can be cleaned in time without affecting the flue gas purification, so that the device can ensure good working efficiency.

[0011] Furthermore, both sides of the ash discharge trough extend downwardly to form an inclined surface, which is beneficial to guiding the fall of cloth ash.

[0012] Furthermore, the opening and closing structure includes a rotating drum, both ends of which are rotatably connected to the side walls of the dust removal chamber respectively, the peripheral wall of the rotating drum blocks the ash discharge groove, a groove is axially provided on the rotating drum, and a motor for driving the rotating drum to rotate is provided on the tower body, so as to freely control the opening and closing of the ash discharge groove to avoid regular cleaning of cloth ash when smoke passes through.

[0013] Furthermore, a partition is provided in the deacidification chamber, which divides the deacidification chamber into two parts, an upper and lower part. A through groove connecting the upper and lower parts is provided in the middle of the partition. Both sides of the through groove extend downward to form a baffle. The through groove is located directly above the ash discharge trough to prevent particulate matter generated during the deacidification treatment from falling into the first cloth bag.

[0014] Furthermore, the first blowing assembly includes a first feed pipe opened on the tower body, the first feed pipe is connected to the dust removal chamber, the first feed pipe is externally connected to a first injection device, and the adsorption particles are activated carbon.

[0015] Furthermore, the second blowing assembly includes a second feed pipe opened on the tower body, the second feed pipe is connected to the deacidification chamber, the second feed pipe is externally connected to a second injection device, and the alkaline particles are baking soda. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure of AA.

[0018] In the figure: 1. tower body; 11. exhaust gas inlet; 12. clean gas outlet; 2. dust removal chamber; 21. ash discharge chute; 22. rotating drum; 23. groove; 24. motor; 3. partition; 31. through groove; 32. baffle; 4. deacidification chamber; 5. clean gas chamber; 61. first cloth bag; 62. first feed pipe; 71. second cloth bag; 72. second feed pipe. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1 and Figure 2 The present embodiment provides a waste incineration flue gas purification device, including a tower body 1, wherein the tower body 1 is provided with a dust removal chamber 2 for dust removal of flue gas, a deacidification chamber 4 for removing acidic gas in the flue gas, and a clean gas chamber 5 for discharging the gas after dust removal and deacidification from bottom to top, and the bottom of the dust removal chamber 2 is also provided with an ash discharge structure for discharging dust; wherein, the tower body 1 is provided with an exhaust gas inlet 11 connected to the dust removal chamber 2, and is also provided with a clean gas outlet 12 connected to the clean gas chamber 5, the flue gas enters the tower body 1 through the exhaust gas inlet 11, and is discharged from the clean gas outlet 12 after a series of dust removal and deacidification work.

[0021] For the dust removal work in the dust removal chamber 2, in this embodiment, a first feed pipe 62 for connecting to the inside of the dust removal chamber 2 is provided on the tower body 1. The first feed pipe 62 is externally connected to a first injection device for injecting adsorption particles into the dust removal chamber 2. The first injection device includes a storage tank, a conveying structure, etc. In this embodiment, the adsorption particles are preferably activated carbon. Industrially prepared activated carbon particles have rich microporous structures and large specific surface areas, and have strong adsorption capabilities for organic pollutants in flue gas such as dioxins and heavy metals.

[0022] A plurality of first cloth bags 61 are arranged in the dust removal chamber 2. The first cloth bags 61 are fixed to the upper wall of the dust removal chamber 2 and the upper openings thereof are connected to the deacidification chamber 4. The flue gas in the dust removal chamber 2 passes through the first cloth bags 61 and enters the deacidification chamber 4, and particulate matter such as fly ash and activated carbon therein is blocked and filtered out by the first cloth bags 61.

[0023] For the deacidification work in the deacidification chamber 4, in this embodiment, a second feed pipe 72 for connecting to the inside of the deacidification chamber 4 is provided on the tower body 1, and the second feed pipe 72 is externally connected to a second injection device for injecting alkaline particles into the deacidification chamber 4. The second injection device includes a storage tank, a conveying structure, etc. In this embodiment, the alkaline particles are preferably baking soda, which is used to remove hydrogen chloride in the flue gas.

[0024] At present, the removal of hydrogen chloride in waste incineration flue gas relies on two methods: semi-dry tower lime slurry and quicklime before the bag filter. However, the quicklime deacidification efficiency is low, the utilization rate is poor, and there are many reaction by-products. In addition, with the regulation of lime kilns by environmental protection departments, the price of quicklime has gradually increased. Therefore, the quicklime deacidification has gradually failed to meet the demand. Compared with quicklime, baking soda has finer particle size and larger specific surface area. At the same time, a large amount of carbon dioxide and water will be produced during the reaction process, forming a rich microporous structure inside it, making the reaction utilization efficiency higher. The molar volume of the main reaction product sodium chloride is only 68.82% of that of sodium bicarbonate. It is not easy to get blocked, while reducing the fly ash production and alleviating the pressure of fly ash disposal.

[0025] A plurality of second cloth bags 71 are provided in the deacidification chamber 4. The second cloth bags 71 are fixed to the upper wall of the deacidification chamber 4 and the upper openings thereof are connected to the clean air chamber 5. The flue gas in the deacidification chamber 4 enters the clean air chamber 5 after being filtered by the second cloth bags 71, and the unfiltered particulate matter and excess baking soda in the flue gas are filtered out.

[0026] Since bag ash will also be produced in the deacidification chamber 4, in order to discharge the bag ash to avoid affecting the operation of the first bag 61, a connected ash discharge trough 21 is provided between the dust removal chamber 2 and the deacidification chamber 4. Both sides of the ash discharge trough 21 extend downward to form an inclined surface. The bag ash falling on the bottom of the deacidification chamber 4 slides into the bottom of the dust removal chamber 2 through the ash discharge trough 21 for collection and discharge.

[0027] However, during the dust removal and deacidification work, the ash discharge trough 21 cannot remain open, otherwise the flue gas in the dust removal chamber 2 will directly enter the deacidification chamber 4 through the ash discharge trough 21. Therefore, in this embodiment, a rotating drum 22 is provided at the lower side of the ash discharge trough 21, and the two ends of the rotating drum 22 are respectively rotatably connected to the side walls of the dust removal chamber 2, and a motor 24 for driving the rotating drum 22 to rotate is provided on the tower body 1. In the initial state, the peripheral wall of the rotating drum 22 abuts against the lower side of the ash discharge trough 21 to block the ash discharge trough 21 and prevent the flue gas from passing through. A groove 23 is axially provided on the rotating drum 22. When the motor 24 drives the rotating drum 22 to rotate, the groove 23 rotates through the ash discharge trough 21 and then communicates with the ash discharge trough 21. At this time, the bagged ash accumulated at the ash discharge trough 21 will fall into the groove 23, and as the rotating drum 22 rotates, the bagged ash in the groove 23 is poured downward into the bottom of the dust removal chamber 2.

[0028] It should be added that when the bag ash in the deacidification chamber 4 falls, it is easy to fall into the first bag 61 and affect the filtering effect. Figure 2In the embodiment shown, a partition 3 is provided in the deacidification chamber 4 to divide the deacidification chamber 4 into two parts, an upper and lower part, and a through groove 31 connecting the upper and lower parts is provided in the middle of the partition 3, wherein the through groove 31 is located directly above the ash discharge groove 21 to guide the bag ash in the deacidification groove to fall downward onto the ash discharge groove 21 to avoid falling into the first bag 61; and both sides of the through groove 31 extend downward to form a baffle 32, which not only strengthens the restriction and guiding effect on the bag ash, but also guides the flue gas coming up from the first bag 61, so that the flue gas can pass through the through groove 31 as much as possible, thereby enhancing the full reaction with baking soda.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A waste incineration flue gas purification device, comprising a tower body (1), characterized in that: The tower body (1) is provided with a dust removal chamber (2), a deacidification chamber (4) and a clean air chamber (5) in sequence from bottom to top; the tower body (1) is provided with an exhaust gas inlet (11) connected to the dust removal chamber (2) and a clean air outlet (12) connected to the clean air chamber (5); the tower body (1) is provided with a first blowing assembly for blowing adsorbed particles into the dust removal chamber (2), and a second blowing assembly for blowing alkaline particles into the deacidification chamber (4); the dust removal chamber (2) is provided with a first cloth bag (61), the opening of which is located in the deacidification chamber (4); the deacidification chamber (4) is provided with a second cloth bag (71), the opening of which is located in the clean air chamber (5); a ash discharge trough (21) is provided between the dust removal chamber (2) and the deacidification chamber (4), and the dust removal chamber (2) is also provided with an opening and closing structure for opening and closing the ash discharge trough (21).

2. A waste incineration flue gas purification device according to claim 1, characterized in that: Both sides of the ash discharge groove (21) extend downwardly in an inclined manner to form an inclined surface.

3. A waste incineration flue gas purification device according to claim 2, characterized in that: The opening and closing structure comprises a rotating drum (22), the two ends of the rotating drum (22) are respectively rotatably connected to the side walls of the dust removal chamber (2), the peripheral wall of the rotating drum (22) blocks the dust discharge groove (21), a groove (23) is axially provided on the rotating drum (22), and a motor (24) for driving the rotating drum (22) to rotate is provided on the tower body (1).

4. A waste incineration flue gas purification device according to claim 3, characterized in that: A partition (3) is provided in the deacidification chamber (4), and the partition (3) divides the deacidification chamber (4) into two parts, an upper part and an lower part. A through groove (31) is provided in the middle of the partition (3) for connecting the two parts, and two sides of the through groove (31) extend downward to form baffles (32). The through groove (31) is located directly above the ash discharge groove (21).

5. The waste incineration flue gas purification device according to claim 1, characterized in that: The first blowing assembly comprises a first feed pipe (62) opened on the tower body (1), the first feed pipe (62) being connected to the dust removal chamber (2), the first feed pipe (62) being externally connected to a first injection device, and the adsorption particles are activated carbon.

6. The waste incineration flue gas purification device according to claim 1, characterized in that: The second blowing assembly comprises a second feed pipe (72) opened on the tower body (1), the second feed pipe (72) being connected to the deacidification chamber (4), the second feed pipe (72) being externally connected to a second injection device, and the alkaline particles are baking soda.

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