Flue gas desulfurization and dust removal device

Abstract

The utility model discloses a flue gas desulfurization and dust removal device which comprises a desulfurization kettle body and a cyclone separator, the cyclone separator is provided with a side gas inlet, a top gas outlet and a bottom ash discharge port, the cyclone separator is installed at the lower end of the desulfurization kettle body, the top gas outlet penetrates into the desulfurization kettle body, and the bottom ash discharge port penetrates into the desulfurization kettle body. A liquid outlet is formed in the lower end of the desulfurization kettle body, an exhaust port is formed in the top end of the desulfurization kettle body, a spraying head is arranged in the desulfurization kettle body, a liquid inlet of the spraying head penetrates out of the desulfurization kettle body, and the spraying direction of the spraying head faces downwards. And the top gas outlet extends into the desulfurization kettle body, so that the cyclone separator and the desulfurization kettle body are integrated into gas, the structure is compact, and the cyclone separator and the desulfurization kettle body are connected without a pipeline.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas treatment, and in particular relates to a flue gas desulfurization and dust removal device. Background Art

[0002] At present, most of the existing flue gas desulfurization and dust removal equipment remove dust before desulfurization, and the dust removal equipment and the desulfurization equipment are connected by a pipeline, which makes them occupy a large space. In addition, the pipeline connection between the dust removal equipment and the desulfurization equipment also leads to the risk of flue gas leakage between the two. Although the patent document with document number CN109833706A "Flue Gas Desulfurization and Dust Removal System" discloses a dust removal and desulfurization tower with both dust removal and desulfurization functions, its multiple swirl plates and multiple spray heads are distributed in the upper and lower parts of the tower body, and the swirl plates will contact the desulfurization liquid, so the dust is finally mixed in the desulfurization liquid. Therefore, the dust removal is actually the desulfurization liquid adsorbing the dust, which eventually makes the discharged desulfurization liquid turbid and difficult to recycle. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a flue gas desulfurization and dust removal device which has a simple structure and can both remove dust and desulfurize the flue gas and has a compact structure.

[0004] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a flue gas desulfurization and dust removal device, comprising a desulfurization kettle body and a cyclone separator, the cyclone separator having a side air inlet, a top air outlet and a bottom ash outlet, the cyclone separator is installed at the lower end of the desulfurization kettle body, and the top air outlet penetrates into the desulfurization kettle body, a liquid discharge port is arranged at the lower end of the desulfurization kettle body, an exhaust port is arranged at the top end of the desulfurization kettle body, a spray head is arranged inside the desulfurization kettle body, and the liquid inlet of the spray head penetrates out of the desulfurization kettle body, and the spraying direction of the spray head is downward.

[0005] The beneficial effect of the above technical solution is that by directly installing the cyclone separator at the lower end of the desulfurization kettle body and extending the top gas outlet into the desulfurization kettle body, the cyclone separator and the desulfurization kettle body are integrated in the gas, the structure is compact, and there is no need to connect the cyclone separator and the desulfurization kettle body through a pipeline.

[0006] In the above technical solution, the desulfurization kettle body and the upper end of the cyclone separator are integrally formed, and a flue gas distributor is also provided at the top gas outlet, and the spray head is located above the flue gas distributor.

[0007] The beneficial effect of the above technical solution is that the flue gas discharged from the top gas outlet of the cyclone separator can be evenly distributed in the desulfurization kettle body.

[0008] In the middle part of the smoke distributor in the above technical solution, the top air outlet extends into the smoke distributor, and aeration holes are evenly distributed on the smoke distributor.

[0009] The beneficial effects of the above technical solution are: its structure is simple, and the flue gas is well dispersed in the desulfurization kettle body. At the same time, the exhaust rate of the flue gas distributor is high, thereby ensuring smooth exhaust from the top outlet of the cyclone separator.

[0010] In the above technical solution, a liquid-proof cover is also provided in the smoke distributor above the top gas outlet.

[0011] The beneficial effect of the above technical solution is that it can prevent the desulfurization liquid sprayed from the spray head from entering the flue gas separator and infiltrating into the cyclone separator.

[0012] The liquid-proof cover in the above technical solution is a conical cover, and the tip of the cone faces upward.

[0013] The beneficial effects of the above technical solution are: its structure is simple and its anti-drainage effect on the top air outlet is good.

[0014] In the above technical solution, a wire mesh filling material layer is arranged in the desulfurization kettle body between the flue gas distributor and the spray head.

[0015] The beneficial effect of the above technical solution is that the flue gas can be better contacted with the desulfurization liquid during the process of being discharged upward in the desulfurization kettle body, which is conducive to improving the desulfurization effect.

[0016] In the above technical solution, the spray heads and wire mesh filling material layers are arranged in multiple and one-to-one correspondence. The multiple spray heads are vertically spaced in the desulfurization kettle body and are all located above the flue gas distributor. Each wire mesh filling material layer is arranged below the corresponding spray head.

[0017] The beneficial effect of the above technical solution is that the flue gas is sprayed multiple times in the desulfurization kettle body, and the desulfurization effect is good.

[0018] In the above technical solution, the number of the spray heads and the number of the wire mesh filling material layers are 2-5.

[0019] The beneficial effects of the above technical solution are: its structure is simple and its desulfurization effect is good.

[0020] The inner wall of the desulfurization kettle body in the above technical solution is coated with a corrosion-resistant coating.

[0021] The beneficial effect of the above technical solution is that the corrosion resistance of the desulfurization kettle body is improved.

[0022] The spray head described in the above technical solution is a spray nozzle.

[0023] The beneficial effect of the above technical solution is that the desulfurization liquid is sprayed out in a mist form, and its contact effect with the flue gas is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a simplified structural diagram of the flue gas desulfurization and dust removal device according to an embodiment of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the smoke distributor described in the embodiment of the utility model;

[0026] Figure 3 This is another schematic structural diagram of the flue gas desulfurization and dust removal device described in an embodiment of the utility model.

[0027] In the figure: 1 desulfurization kettle body; 11 liquid discharge port; 12 air outlet; 2 cyclone separator; 21 air inlet; 22 top air outlet; 23 bottom ash outlet; 3 spray head; 31 liquid inlet; 4 flue gas distributor; 41 aeration hole; 42 liquid-proof cover; 5 wire mesh filling material layer. DETAILED DESCRIPTION

[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0029] like Figure 1 As shown, this embodiment provides a flue gas desulfurization and dust removal device, including a desulfurization kettle body 1 and a cyclone separator 2, the cyclone separator 2 having a side air inlet 21, a top air outlet 22 and a bottom ash outlet 23, the cyclone separator 2 is installed at the lower end of the desulfurization kettle body 1, and the top air outlet 22 penetrates into the desulfurization kettle body 1, a liquid discharge port 11 is arranged at the lower end of the desulfurization kettle body 1, an exhaust port 12 is arranged at the top of the desulfurization kettle body 1, a spray head 3 is arranged in the desulfurization kettle body 1, and a liquid inlet 31 of the spray head 3 penetrates out of the desulfurization kettle body 1, and the spraying direction of the spray head 3 is downward, by directly installing the cyclone separator at the lower end of the desulfurization kettle body, and extending the top air outlet into the desulfurization kettle body, the cyclone separator and the desulfurization kettle body are integrated in the gas, the structure is compact, and there is no need to connect the cyclone separator and the desulfurization kettle body through a pipeline.

[0030] In the above technical scheme, the desulfurization kettle body 1 is integrally formed with the upper end of the cyclone separator 2, and a flue gas distributor 4 is also provided at the top gas outlet 22. The spray head 3 is located above the flue gas distributor 4, so that the flue gas discharged from the top gas outlet of the cyclone separator can be evenly distributed in the desulfurization kettle body.

[0031] In this embodiment, the distance between the upper end of the top gas outlet extending inwardly into the desulfurization kettle body and the bottom wall of the desulfurization kettle body can be at least 20 cm.

[0032] like Figure 2 As shown, in the middle of the interior of the flue gas distributor 4 in the above technical solution, the top air outlet 22 extends into the flue gas distributor 4, and the flue gas distributor 4 is evenly provided with aeration holes 41 (the flue gas distributor can be a circular plate-shaped shell, and the top wall, side wall and bottom wall of the flue gas distributor are evenly provided with aeration holes, and the upper end of the top air outlet is coaxially connected with the middle part of the lower end of the flue gas distributor), as described in this embodiment), its structure is simple, and the flue gas is well dispersed in the desulfurization kettle body, and at the same time, the exhaust rate of the flue gas distributor is high, thereby ensuring smooth exhaust of the top air outlet of the cyclone separator.

[0033] In the above technical solution, a liquid-proof cover 42 is also provided in the flue gas distributor 4 above the top air outlet 22, so as to prevent the desulfurization liquid sprayed from the spray head from entering the middle flue gas separator and infiltrating into the cyclone separator (the upper end of the liquid-proof cover is fixedly connected to the middle part of the inner top wall of the flue gas distributor), and there is a gap between the liquid-proof cover and the top air outlet for the flue gas to be discharged into the flue gas distributor through the gap.

[0034] The depth of the top air outlet extending into the flue gas distributor can be 3-5 cm (the aeration holes on the bottom wall of the flue gas distributor can also discharge the desulfurization liquid that has infiltrated into the flue gas distributor to avoid accumulation of desulfurization liquid in the flue gas distributor).

[0035] The liquid-proof cover 42 in the above technical solution is a conical cover with the tip of the cone facing upwards. It has a simple structure and has a good anti-drenching effect on the top air outlet.

[0036] like Figure 3 As shown, in the above technical solution, a wire mesh filling material layer 5 is arranged between the flue gas distributor 4 and the spray head 3 in the desulfurization kettle body 1, so that the flue gas can be better contacted with the desulfurization liquid during the upward discharge in the desulfurization kettle body, which is conducive to improving the desulfurization effect. The spray head in this embodiment sprays the desulfurization liquid downward (the desulfurization liquid belongs to the existing commonly used desulfurization alkali liquid, which will not be described here).

[0037] In the above technical solution, the spray heads 3 and the wire mesh filling material layers 5 are provided in multiple and one-to-one correspondence. The multiple spray heads 3 are vertically spaced in the desulfurization kettle body 1 and are all located above the flue gas distributor 4. Each wire mesh filling material layer 5 is arranged below the corresponding spray head 3, so that the flue gas is sprayed multiple times in the desulfurization kettle body and the desulfurization effect is good. Specifically, the spray heads 3 and the wire mesh filling material layers 5 are provided in 2-5 numbers, which has a simple structure and a good desulfurization effect.

[0038] In this embodiment, there is a wire mesh filling material layer between two adjacent spray heads, and there is also a wire mesh filling material layer between the lowest spray head and the flue gas distributor, and there is a certain distance between each spray head and the spray head below it (the distance can be 0.5-1m), so that the desulfurization liquid sprayed by the spray head can evenly fall on the corresponding wire mesh filling material layer. The wire mesh filling material layer is an existing product and will not be described here.

[0039] The inner wall of the desulfurization kettle body 1 in the above technical scheme is coated with a corrosion-resistant coating, so that the corrosion resistance of the desulfurization kettle body is excellent (the corrosion-resistant coating can be a ceramic coating. Of course, the part of the top gas outlet located in the desulfurization kettle body and the surface of the flue gas distributor also need to be coated with a corrosion-resistant coating).

[0040] The spray head 3 in the above technical solution is a spray nozzle, so that the desulfurization liquid is sprayed out in a mist form, and its contact effect with the flue gas is better (the spray head can be composed of multiple atomizing nozzles that are on the same horizontal plane and evenly distributed).

[0041] In this embodiment, an ash discharge valve may be provided at the bottom ash discharge port.

[0042] The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A flue gas desulfurization and dust removal device, characterized in that: The invention comprises a desulfurization kettle body (1) and a cyclone separator (2), wherein the cyclone separator (2) has a side air inlet (21), a top air outlet (22) and a bottom ash outlet (23), the cyclone separator (2) is installed at the lower end of the desulfurization kettle body (1), and the top air outlet (22) penetrates into the desulfurization kettle body (1), a liquid discharge port (11) is arranged at the lower end of the desulfurization kettle body (1), and an exhaust port (12) is arranged at the top end of the desulfurization kettle body (1), a spray head (3) is arranged in the desulfurization kettle body (1), and the liquid inlet (31) of the spray head (3) penetrates out of the desulfurization kettle body (1), and the spraying direction of the spray head (3) is downward.

2. The flue gas desulfurization and dust removal device according to claim 1, characterized in that: The desulfurization kettle body (1) and the upper end of the cyclone separator (2) are integrally formed, and a flue gas distributor (4) is also provided at the top gas outlet (22), and the spray head (3) is located above the flue gas distributor (4).

3. The flue gas desulfurization and dust removal device according to claim 2, characterized in that: In the middle of the interior of the smoke distributor (4), the top air outlet (22) extends into the smoke distributor (4), and aeration holes (41) are evenly distributed on the smoke distributor (4).

4. The flue gas desulfurization and dust removal device according to claim 3, characterized in that: A liquid-proof cover (42) is also provided in the smoke distributor (4) above the top gas outlet (22).

5. The flue gas desulfurization and dust removal device according to claim 4, characterized in that: The liquid-proof cover (42) is a conical cover, and the tip of the cone faces upward.

6. The flue gas desulfurization and dust removal device according to claim 2, characterized in that: A wire mesh filling material layer (5) is provided in the desulfurization kettle body (1) between the flue gas distributor (4) and the spray head (3).

7. The flue gas desulfurization and dust removal device according to claim 6, characterized in that: The spray heads (3) and the wire mesh filling material layers (5) are provided in multiple and one-to-one correspondence. The multiple spray heads (3) are vertically spaced apart in the desulfurization kettle body (1) and are all located above the flue gas distributor (4). Each wire mesh filling material layer (5) is provided below the corresponding spray head (3).

8. The flue gas desulfurization and dust removal device according to claim 7, characterized in that: The number of the spray heads (3) and the number of the wire mesh filling material layers (5) are 2 to 5.

9. The flue gas desulfurization and dust removal device according to claim 1, characterized in that: The inner wall of the desulfurization kettle body (1) is coated with a corrosion-resistant coating.

10. The flue gas desulfurization and dust removal device according to claim 1, characterized in that: The spray head (3) is a spray nozzle.

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