Flue gas desulfurization circulating device

Abstract

The utility model provides a flue gas desulfurization circulating device which comprises a desulfurization tower, a flue gas inlet pipe and a flue gas outlet, a filtering device is arranged on one side of the bottom of an inner cavity of the desulfurization tower, and the filtering device is connected with a precipitation regeneration box through a second servo pump. The desulfurization liquid at the bottom of the inner cavity of the desulfurization tower is actively and preliminarily filtered by utilizing the filtering device, so that solids in the desulfurization liquid are quickly filtered and removed, and the filtering efficiency of waste liquid is improved; the precipitation regeneration box is used for sequentially performing precipitation clarification, ingredient regeneration and storage on the preliminarily filtered desulfurization liquid, so that an effective desulfurization function is kept in the desulfurization liquid recycling process, and the desulfurization effect is ensured while the recycling effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization, in particular to a flue gas desulfurization circulation device. Background Technique

[0002] After the boiler burns, various organic and inorganic sulfurs contained in the coal are converted into sulfur oxides mainly composed of sulfur dioxide. The sulfur dioxide enters the atmosphere and combines with the water in the atmosphere to form acid rain, which not only has a serious impact on ground buildings and crops, but also damages the human body. Therefore, flue gas desulfurization is an important part of environmental protection.

[0003] A flue gas desulfurization device (publication number: CN221244622U) is disclosed in the prior art, which includes a desulfurization tower. A spraying mechanism is arranged inside the upper end of the desulfurization tower, a demisting mechanism is arranged above the spraying mechanism, and a filtering component is arranged between the bottom of the desulfurization tower and the spraying mechanism.

[0004] However, the above technical solution and the prior art also have the following defects:

[0005] During the use of this utility model, the filtering component is used to filter the waste in the desulfurized liquid after desulfurization, so as to prevent the waste from entering the inside of the annular spraying pipe through the liquid delivery pipe and causing blockage of the nozzles on the annular spraying pipe, affecting the spraying desulfurization effect. However, during the desulfurization reaction process, the desulfurized liquid is filtered by the filtering component to remove impurities and then recycled. As a result, the desulfurizing agent in the desulfurized liquid will be gradually consumed and not replenished in time, resulting in a reduction in the desulfurization ability during the recycling process of the desulfurized liquid, reducing the effectiveness of the desulfurized liquid, and thus reducing the desulfurization effect and efficiency. Content of the Utility Model

[0006] The purpose of the utility model is to provide a flue gas desulfurization circulation device to solve the problems raised in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solution:

[0008] A flue gas desulfurization circulation device includes a desulfurization tower, a smoke inlet pipe and a smoke outlet. A filtering device is arranged on one side of the bottom cavity of the desulfurization tower. The filtering device is used for filtering the desulfurized liquid at the bottom of the inner cavity of the desulfurization tower to realize the recycling of the desulfurized liquid. The filtering device is connected to a precipitation and regeneration tank through a second servo pump. The liquid inlet end of the second servo pump is connected to the filtering device through a water suction pipe, and the liquid outlet end of the second servo pump is connected to the precipitation and regeneration tank through a water inlet pipe;

[0009] The precipitation and regeneration tank is used for re-precipitating, filtering and recycling the desulfurized liquid to realize the recycling of the desulfurized liquid.

[0010] Preferably, the filtering device includes a sludge removal cylinder, a first stirring device, a first servo pump, a discharge pipe and a discharge valve. The sludge removal cylinder is connected to the second servo pump through a water suction pipe, and the sludge removal cylinder is connected to one side of the bottom of the desulfurization tower through the first servo pump, so as to pump the desulfurization liquid in the desulfurization tower into the sludge removal cylinder. A first stirring device is arranged inside the sludge removal cylinder, and a discharge pipe is arranged at the bottom of the sludge removal cylinder. A discharge valve is arranged on the discharge pipe.

[0011] Preferably, the filtering device further includes a sludge collecting pipe, a sludge conveying pipe, a sludge pumping pump and a sludge collecting box. The top end of the sludge collecting pipe is fixedly connected to the discharge pipe, and the bottom end of the sludge collecting pipe is connected to the sludge pumping pump through the sludge conveying pipe. The sludge pumping pump is connected to the sludge collecting box through a connecting pipe.

[0012] Preferably, the precipitation and regeneration tank includes a tank body and a partition board. The inner cavity of the tank body is divided into a precipitation and clarification cavity, a regeneration cavity and a circulation cavity by the partition board. The precipitation and clarification cavity is used for the secondary precipitation treatment of the desulfurization liquid. The regeneration cavity is used for the regeneration of the desulfurization liquid to ensure that the liquid maintains an effective desulfurization capacity. The circulation cavity is used for the storage and recycling of the regenerated desulfurization liquid.

[0013] Preferably, the precipitation and regeneration tank further includes a second stirring device. The second stirring device is arranged in the regeneration cavity. The upper part of the regeneration cavity is connected to the feeding control device through a desulfurizing agent feeding pipe. The feeding control device is used for feeding fresh desulfurizing agent into the regeneration cavity to ensure that the liquid maintains an effective desulfurization capacity.

[0014] Preferably, a filter screen is arranged inside the precipitation and clarification cavity. The filter screen is used for isolating the sediment waste at the bottom of the precipitation and clarification cavity.

[0015] Preferably, the precipitation and clarification cavity, the regeneration cavity and the circulation cavity are connected through a first circulation pump and a second circulation pump to realize the recycling of the desulfurization liquid. The circulation cavity is connected to a spraying device arranged in the desulfurization tower through a spraying pump.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. By arranging a filtering device between the desulfurization tower and the precipitation and regeneration tank, the desulfurization liquid at the bottom of the inner cavity of the desulfurization tower is actively filtered, the solids in the desulfurization liquid are quickly filtered and removed, the filtering efficiency of the waste liquid is improved, and through the arrangement of the sludge removal cylinder, the first stirring device, the sludge collecting pipe and the sludge pumping pump, the waste in the desulfurization liquid is quickly and actively filtered, cleaned and uniformly collected, and the filtering and cleaning effect of the desulfurization liquid is improved;

[0018] 2. By setting up a precipitation regeneration tank, the desulfurization liquid filtered by the filtration device is subjected to secondary precipitation filtration, thereby improving the filtration and purification effect of the desulfurization liquid, ensuring the desulfurization function during the recycling of the desulfurization liquid, improving the recycling effect while ensuring the desulfurization effect. The precipitation regeneration tank is used to sequentially carry out precipitation clarification, ingredient regeneration and storage of the desulfurization liquid, ensuring that the liquid maintains an effective desulfurization capacity for cyclic desulfurization use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the structure of the filtration device of the present invention.

[0021] Figure 3 It is a schematic diagram of the structure of the precipitation regeneration tank of the present invention.

[0022] In the figure: 1. Desulfurization tower; 2. Inlet smoke pipe; 3. Outlet smoke port; 4. Filtration device; 401. Mud removal cylinder; 402. First stirring device; 403. First servo pump; 404. Discharge pipe; 405. Mud collecting pipe; 406. Mud conveying pipe; 407. Mud pumping pump; 408. Mud collecting box; 409. Discharge valve; 5. Precipitation regeneration tank; 501. Tank body; 5011. Precipitation clarification chamber; 5012. Regeneration chamber; 5013. Circulation chamber; 502. Partition board; 503. Second stirring device; 6. Second servo pump; 7. Water suction pipe; 8. Water inlet pipe; 9. First circulation pump; 10. Second circulation pump; 11. Spraying pump; 12. Desulfurizing agent feeding pipe; 13. Filter screen. SPECIFIC EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1 - 3 , the present invention provides a technical solution:

[0025] Embodiment 1:

[0026] A flue gas desulfurization circulation device includes a desulfurization tower 1, a flue gas inlet pipe 2, and a flue gas outlet 3. On one side of the bottom inside the desulfurization tower 1, a filtering device 4 is provided. The filtering device 4 is used for filtering the desulfurization liquid at the bottom inside the desulfurization tower 1 to realize the recycling of the desulfurization liquid. The filtering device 4 is connected to a precipitation regeneration tank 5 through a second servo pump 6. The liquid inlet end of the second servo pump 6 is connected to the filtering device 4 through a water suction pipe 7, and the liquid outlet end of the second servo pump 6 is connected to the precipitation regeneration tank 5 through a water inlet pipe 8.

[0027] The precipitation regeneration tank 5 is used for re-precipitating, filtering, and recycling the desulfurization liquid to realize the recycling of the desulfurization liquid.

[0028] The filtering device 4 includes a mud removal cylinder 401, a first stirring device 402, a first servo pump 403, a discharge pipe 404, and a discharge valve 409. The mud removal cylinder 401 is connected to the second servo pump 6 through a water suction pipe 7, and the mud removal cylinder 401 is connected to one side of the bottom of the desulfurization tower 1 through the first servo pump 403 to realize pumping the desulfurization liquid in the desulfurization tower 1 into the mud removal cylinder 401. A first stirring device 402 is arranged inside the mud removal cylinder 401, and a discharge pipe 404 is arranged at the bottom of the mud removal cylinder 401. A discharge valve 409 is arranged on the discharge pipe 404.

[0029] The filtering device 4 further includes a mud collecting pipe 405, a mud conveying pipe 406, a mud pumping pump 407, and a mud collecting box 408. The top end of the mud collecting pipe 405 is fixedly connected to the discharge pipe 404, and the bottom end of the mud collecting pipe 405 is connected to the mud pumping pump 407 through the mud conveying pipe 406. The mud pumping pump 407 is connected to the mud collecting box 408 through a connecting pipe.

[0030] In this embodiment, by arranging the filtering device 4 between the desulfurization tower 1 and the precipitation regeneration tank 5, active filtration of the desulfurization liquid at the bottom inside the desulfurization tower 1 is realized, and the solids in the desulfurization liquid are quickly filtered and removed. The desulfurization liquid at the bottom of the desulfurization tower 1 is pumped into the mud removal cylinder 401 by the first servo pump 403. After the desulfurization liquid is agitated by the first stirring device 402 and then left to stand, the solids in the desulfurization liquid are concentrated at the bottom of the mud removal cylinder 401. Then, the discharge valve 409 on the discharge pipe 404 is opened, so that part of the desulfurization liquid and the solids fall into the mud collecting pipe 405 together, and then the discharge valve 409 is closed. The waste mud in the mud collecting pipe 405 is pumped into the mud collecting box 408 by the drive of the mud pumping pump 407 for unified collection and treatment, realizing quick and active filtration and cleaning of the waste in the desulfurization liquid and improving the filtration and cleaning effect of the desulfurization liquid.

[0031] Embodiment Two:

[0032] Based on Embodiment One, a description is given of the precipitation regeneration tank 5 mentioned in Embodiment One:

[0033] The precipitation regeneration tank 5 includes a tank body 501 and a partition plate 502. The inner cavity of the tank body 501 is divided into a precipitation clarification chamber 5011, a regeneration chamber 5012, and a circulation chamber 5013 by the partition plate 502. The precipitation clarification chamber 5011 is used for the secondary precipitation treatment of the desulfurization liquid. The regeneration chamber 5012 is used for the regeneration of the desulfurization liquid to ensure that the liquid maintains an effective desulfurization capacity. The circulation chamber 5013 is used for the storage and recycling of the regenerated desulfurization liquid.

[0034] The precipitation regeneration tank 5 further includes a second stirring device 503. The second stirring device 503 is arranged in the regeneration chamber 5012. The upper part of the regeneration chamber 5012 is connected to the feeding control device through a desulfurizer feeding pipe 12. The feeding control device is used to put fresh desulfurizer into the regeneration chamber 5012 to ensure that the liquid maintains an effective desulfurization capacity.

[0035] A filter screen 13 is arranged inside the precipitation clarification chamber 5011. The filter screen 13 is used for isolating the precipitation waste at the bottom of the precipitation clarification chamber 5011. The water inlet pipe 8 penetrates through the filter screen 13 and extends to the bottom of the filter screen 13. The filter screen 13 is made of non-woven fabric, so as to isolate the solid waste in the precipitation clarification chamber 5011 at the bottom of the filter screen 13.

[0036] The precipitation clarification chamber 5011, the regeneration chamber 5012, and the circulation chamber 5013 are connected through a first circulation pump 9 and a second circulation pump 10 to realize the recycling of the desulfurization liquid. The circulation chamber 5013 is connected to the spraying device arranged in the desulfurization tower 1 through a spraying pump 11.

[0037] In this embodiment, by setting the precipitation regeneration tank 5, the desulfurization liquid filtered by the filtering device 4 is subjected to secondary precipitation filtration, so as to improve the filtration and purification effect of the desulfurization liquid and ensure the recycling effect of the desulfurization liquid. The precipitation clarification chamber 5011 is used to perform secondary precipitation filtration on the desulfurization liquid filtered by the filtering device 4. The precipitated waste is located at the bottom of the filter screen 13, and the clarified liquid is located above the filter screen 13. The clarified desulfurization liquid is pumped into the regeneration chamber 5012 by the drive of the first circulation pump 9. The concentration and activity of the desulfurization liquid are monitored by the monitoring and control device in the regeneration chamber 5012. The detection and control device of the desulfurization liquid is a prior art and will not be elaborated here in detail. When the concentration and activity are low, fresh desulfurizer is transported from the desulfurizer feeding pipe 12 into the regeneration chamber 5012 through the feeding control device. The second stirring device 503 is used to stir the desulfurization liquid and the desulfurizer. By supplementing the desulfurizer, its concentration and activity are always kept within an effective range to ensure that the liquid maintains an effective desulfurization capacity. The regenerated desulfurization liquid is pumped into the circulation chamber 5013 by the second circulation pump 10 for storage and recycling. During the process of desulfurizing the flue gas in the desulfurization tower 1, the desulfurization liquid in the circulation chamber 5013 is pumped into the spraying device in the desulfurization tower 1 through the spraying pump 11 for spray desulfurization.

[0038] Working principle: The desulfurization liquid is pumped into the desulfurization tower 1 by the drive of the spray pump 11 for spray desulfurization, so that the desulfurization liquid in contact with the flue gas falls to the bottom of the desulfurization tower 1. The desulfurized liquid contains solid waste. The waste liquid is pumped into the sludge removal cylinder 401 by the first servo pump 403 for unified filtration treatment. The first stirring device 402 is used to stir the waste in the sludge removal cylinder 401 and then let it stand. The waste is concentrated at the bottom. The discharge valve 409 is opened to allow part of the waste liquid and waste to fall into the sludge collecting pipe 405, and then the discharge valve 409 is closed. The waste in the sludge collecting pipe 405 is pumped into the sludge collecting tank 408 by the sludge pumping pump 407 for collection and treatment. The desulfurization liquid filtered by the sludge removal cylinder 401 is pumped into the precipitation and clarification chamber 5011 by the second servo pump 6 for re-precipitation and clarification. The clarified desulfurization liquid is pumped into the regeneration chamber 5012 by the first circulation pump 9 for batching to ensure that its concentration and activity are always within the effective range and to ensure the desulfurization ability of the desulfurization liquid. Then, the regenerated desulfurization liquid is pumped into the circulation chamber 5013 by the second circulation pump 10 for storage and recycling, so as to achieve an effective desulfurization effect during the recycling of the desulfurization liquid, thereby ensuring the desulfurization efficiency.

[0039] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flue gas desulfurization circulation device, comprising a desulfurization tower (1), a smoke inlet pipe (2) and a smoke outlet (3), characterized in that: A filtering device (4) is provided at one side of the bottom of the inner cavity of the desulfurization tower (1). The filtering device (4) is used for filtering the desulfurization liquid at the bottom of the inner cavity of the desulfurization tower (1) to realize the recycling of the desulfurization liquid. The filtering device (4) is connected to the sedimentation regeneration tank (5) via a second servo pump (6). The liquid inlet end of the second servo pump (6) is connected to the filtering device (4) via a water pumping pipe (7), and the liquid outlet end of the second servo pump (6) is connected to the sedimentation regeneration tank (5) via a water inlet pipe (8); The precipitation regeneration box (5) is used for re-precipitation, filtration and regeneration of the desulfurized liquid for recycling, thereby realizing the recycling of the desulfurized liquid.

2. A flue gas desulfurization circulation device according to claim 1, characterized in that: The filtering device (4) comprises a desilting cylinder (401), a first stirring device (402), a first servo pump (403), a discharge pipe (404) and a discharge valve (409); the desilting cylinder (401) is connected to the second servo pump (6) via a pumping pipe (7), and the desilting cylinder (401) is connected to one side of the bottom of the desulfurization tower (1) via the first servo pump (403), so that the desulfurization liquid in the desulfurization tower (1) is pumped into the desilting cylinder (401); the first stirring device (402) is arranged inside the desilting cylinder (401), and the bottom of the desilting cylinder (401) is provided with a discharge pipe (404), and the discharge pipe (404) is provided with a discharge valve (409).

3. A flue gas desulfurization circulation device according to claim 2, characterized in that: The filtering device (4) further comprises a mud collecting pipe (405), a mud delivery pipe (406), a mud pump (407) and a mud collecting box (408); the top end of the mud collecting pipe (405) is connected and fixed to the discharge pipe (404); the bottom end of the mud collecting pipe (405) is connected to the mud pump (407) via the mud delivery pipe (406); and the mud pump (407) is connected to the mud collecting box (408) via a connecting pipe.

4. A flue gas desulfurization circulation device according to claim 1, characterized in that: The sedimentation and regeneration box (5) comprises a box body (501) and a partition (502). The inner cavity of the box body (501) is divided into a sedimentation and clarification chamber (5011), a regeneration chamber (5012) and a circulation chamber (5013) by the partition (502). The sedimentation and clarification chamber (5011) is used for re-precipitation treatment of the desulfurized liquid, the regeneration chamber (5012) is used for regenerating the desulfurized liquid to ensure that the liquid maintains effective desulfurization capacity, and the circulation chamber (5013) is used for storage and circulation of the regenerated desulfurized liquid.

5. A flue gas desulfurization circulation device according to claim 4, characterized in that: The sedimentation regeneration box (5) also includes a second stirring device (503), which is arranged in the regeneration chamber (5012). The upper part of the regeneration chamber (5012) is connected to a feed control device through a desulfurizer feed pipe (12), and the feed control device is used to feed fresh desulfurizer into the regeneration chamber (5012) to ensure that the liquid maintains effective desulfurization capacity.

6. A flue gas desulfurization circulation device according to claim 4, characterized in that: A filter screen (13) is provided inside the sedimentation and clarification chamber (5011), and the filter screen (13) is used to isolate sediment waste at the bottom of the sedimentation and clarification chamber (5011).

7. A flue gas desulfurization circulation device according to claim 4, characterized in that: The sedimentation and clarification chamber (5011), the regeneration chamber (5012) and the circulation chamber (5013) are connected via a first circulation pump (9) and a second circulation pump (10) to achieve the circulation of the desulfurization liquid. The circulation chamber (5013) is connected to a spray device disposed in the desulfurization tower (1) via a spray pump (11).

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