Absorption tower for wet desulphurization

Abstract

The utility model discloses an absorption tower for wet desulfurization, belongs to the technical field of desulfurization absorption towers, and mainly solves the technical problems that in the prior art, even contact and full reaction of sulfur-containing gas and spraying slurry in a reaction area cannot be ensured when the sulfur-containing gas reacts in the desulfurization reaction area of the absorption tower, and the desulfurization efficiency and the desulfurization effect of the absorption tower are not ideal enough. The absorption tower comprises an absorption tower body, a gas leading-in pipe is embedded in the outer surface of the absorption tower body, a slurry pool is arranged on the inner bottom wall of the absorption tower body, two spraying pipes are fixedly connected to the interior of the absorption tower body through supporting rods, and a plurality of first atomizing nozzles are fixedly installed on the outer surface of one spraying pipe at equal intervals; a water storage tank is arranged on one side of the absorption tower body, lime water slurry is injected into the water storage tank, a water suction pump is fixedly mounted at the top of the water storage tank, an outer cover cylinder is fixedly connected to the interior of the absorption tower body, and a plurality of rotational flow blades are fixedly connected to the inner surface of the outer cover cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization absorption towers, and more specifically, to a wet desulfurization absorption tower. Background Art

[0002] Wet desulfurization technology is the most mature and widely used desulfurization technology. The desulfurization absorption tower is a tower-type equipment for desulfurizing industrial waste gas. It is widely used in the treatment of sulfur-containing gas emissions in industrial fields such as coal-fired power plants.

[0003] However, there are various types of desulfurization absorption towers in the prior art. For example, utility model patent CN204412056U relates to a new wet desulfurization absorption tower with high-efficiency demisting. The utility model is provided with an absorption tower, the lower part of which is a desulfurization reaction zone, and the upper part is a spray zone provided with a spray device. A high-efficiency demisting device is provided on the upper part of the spray zone, and the high-efficiency demisting device is connected to the chimney through a flue gas outlet. By providing the high-efficiency demisting device, ultrafine dust and droplets in the exhaust gas can be removed while desulfurizing to prevent haze.

[0004] Although the desulfurization absorption tower can also remove ultrafine dust and droplets in the exhaust gas, the sulfur-containing gas reacts in the desulfurization reaction zone of the absorption tower, and it cannot be guaranteed that the sulfur-containing gas is in uniform contact with the spray slurry in the reaction zone and fully reacts, resulting in the desulfurization efficiency of the absorption tower being unsatisfactory and the desulfurization effect being poor. In order to avoid this phenomenon, it is very necessary to design a wet desulfurization absorption tower. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In order to achieve the above object, the utility model provides an absorption tower for wet desulfurization, which is achieved by the following specific technical means:

[0007] A wet desulfurization absorption tower comprises an absorption tower body, a gas introduction pipe is embedded in the outer surface of the absorption tower body, a slurry pool is arranged on the inner bottom wall of the absorption tower body, two spray pipes are fixedly connected to the inside of the absorption tower body through a support rod, a plurality of first atomizing nozzles are fixedly installed on the outer surface of one of the spray pipes at equal intervals, and a plurality of second atomizing nozzles are installed on the outer surface of the other spray pipe, a water storage tank is arranged on one side of the absorption tower body, lime water slurry is injected into the water storage tank, a water pump is fixedly installed on the top of the water storage tank, an outer cover tube is fixedly connected to the inside of the absorption tower body, a plurality of swirl blades are fixedly connected to the inner surface of the outer cover tube, one end of the swirl blade is fixedly connected to the inner cover tube, and an overflow port is arranged inside the inner cover tube.

[0008] Preferably, the two spray pipes are arranged symmetrically, the second atomizing nozzle corresponds to the first atomizing nozzle, the output end of the water pump is connected to a water pipe, one end of the water pipe is connected to two branch pipes, and one end of the two branch pipes respectively extends into the spray pipe.

[0009] Preferably, a fixing ring is fixedly installed on the inner wall of the absorption tower body, and the inner surface of the fixing ring is fixedly connected to the outer surface of the outer cover tube, the swirl blades are fixed above the spray pipe, and the inner cover tube is located inside the outer cover tube.

[0010] Preferably, a flow guide hood is fixedly connected to the inner wall of the absorption tower body, and the flow guide hood is located below the spray pipe, the cross-sectional area of ​​the flow guide hood is smaller than the cross-sectional area of ​​the tower body, an air outlet is provided at the top of the flow guide hood, and a collecting hood is fixedly connected to the inner wall of the absorption tower body, and the collecting hood is located above the outer cover tube, an exhaust pipe is embedded in the top of the collecting hood, and one end of the exhaust pipe extends outside the absorption tower body.

[0011] Preferably, a plurality of reinforcing ribs are equidistantly fixedly connected to the bottom of the fixing ring, and ends of the plurality of reinforcing ribs that are away from each other are fixedly connected to the inner wall of the absorption tower body.

[0012] Preferably, the top of the water tank is fixedly connected to the casing, the water pump is fixed in the casing, the input end of the water pump is connected to a suction pipe, and one end of the suction pipe extends into the interior of the water tank.

[0013] Preferably, the slurry pool is located below the gas introduction pipe, a perspective window is provided through the outer surface of the absorption tower body, a base is provided at the bottom of the absorption tower body, and a discharge pipe is embedded in the outer surface of the absorption tower body.

[0014] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0015] During the desulfurization treatment, the high-temperature sulfur-containing gas introduced into the tower body will float upward, and the lime water slurry is transported by a water pump and a water pipe, and the lime water slurry is introduced into two branch pipes, and the lime water slurry is atomized and sprayed out using a spray pipe, a first atomizing nozzle and a second atomizing nozzle to generate water mist droplets. A double lime water curtain is formed by using two atomizing nozzles to perform convection spray on the floating sulfur-containing gas, thereby increasing the contact area and time between the water mist droplets and the sulfur-containing gas, so that the two can initially fully react; when the water mist droplets float up with the sulfur-containing gas and pass through the swirl blades above, when the gas and the droplets pass through the swirl blades from the outer cover tube, the swirl blades force the two to rotate, and the water mist droplets and the gas in the swirling airflow are evenly mixed, further achieving the purpose of full reaction, improving the desulfurization efficiency, and achieving a more excellent desulfurization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a perspective structural schematic diagram of the utility model;

[0019] Figure 3 is a bottom view schematic diagram of a swirl plate;

[0020] Figure 4 It is a partial schematic diagram of the utility model;

[0021] Figure 5 It is a structural schematic diagram of a water storage tank;

[0022] Figure 6 Schematic diagram of the collection hood and exhaust pipe.

[0023] In the figure: 1. absorption tower body; 2. spray pipe; 3. first atomizing nozzle; 4. second atomizing nozzle; 5. outer cover tube; 6. swirl blades; 7. inner cover tube; 8. overflow port; 9. guide cover; 10. air outlet; 11. fixing ring; 12. reinforcing ribs; 13. water storage tank; 14. casing; 15. water pump; 16. water pipe; 17. diverter pipe; 18. suction pipe; 19. gas inlet pipe; 20. collecting cover; 21. exhaust pipe; 22. perspective window; 23. base; 24. slurry pool; 25. discharge pipe. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0027] like Figure 1 , Figure 4 as well as Figure 5 As shown, it is a structural schematic diagram of the absorption tower of wet desulfurization in this embodiment. The absorption tower of wet desulfurization in this embodiment is a tower equipment used for desulfurization treatment of industrial waste gas, which absorbs and removes sulfur-containing gases in industrial waste gas. Wet desulfurization technology is the most mature and widely used desulfurization technology. The desulfurization absorption tower includes an absorption tower body 1 and swirl blades 6. The interior of the absorption tower body 1 is fixedly connected to two spray pipes 2 by support rods. The two spray pipes 2 are symmetrically arranged. A plurality of first atomizing nozzles 3 are fixedly installed on the outer surface of one of the spray pipes 2 at equal intervals, and a plurality of second atomizing nozzles 4 are fixedly installed on the outer surface of the other spray pipe 2 at equal intervals, and the second atomizing nozzles 4 correspond to the first atomizing nozzles 3. A water storage tank 13 is arranged on one side of the absorption tower body 1. Lime water slurry is injected into the water storage tank 13. A water pump 15 is fixedly installed on the top of the water storage tank 13. The output end is connected to a water pipe 16, one end of which is connected to two branch pipes 17, one end of which extends into two spray pipes 2 respectively. When desulfurization treatment is performed, high-temperature sulfur-containing gas is introduced into the absorption tower body 1. At this time, the high-temperature gas will float upward in the tower body. At the same time, the water pump 15 is started, and the lime water slurry in the water storage tank 13 is sucked into the water pipe 16 by the water pump 15. After being transported by the water pipe 16, the lime water slurry is introduced into the two branch pipes 17 respectively, and the lime water slurry is atomized and sprayed by the spray pipe 2, the first atomizing nozzle 3 and the second atomizing nozzle 4 to generate water mist droplets. A double lime water curtain is formed by using two atomizing nozzles to perform convection spraying on the floating sulfur-containing gas, thereby increasing the contact area and time between the water mist droplets and the sulfur-containing gas, so that the two can react initially and fully. A base 23 is provided at the bottom of the absorption tower body 1.

[0028] In addition, if Figure 2 and Figure 3 As shown, in this embodiment, a fixing ring 11 is fixedly installed on the inner wall of the absorption tower body 1, and an outer cover tube 5 is fixedly connected to the inner surface of the fixing ring 11, and a plurality of swirl blades 6 are fixedly connected to the inner surface of the outer cover tube 5, and the swirl blades 6 are fixed above the spray pipe 2, and one end of the swirl blade 6 is fixedly connected to an inner cover tube 7, and the inner cover tube 7 is located in the outer cover tube 5, and an overflow port 8 is arranged inside the inner cover tube 7. Since the water mist droplets will float up with the sulfur-containing gas to pass through the swirl blades 6 above, when the gas and the droplets are discharged from the outer cover tube When passing through the swirl blades 6, the swirl blades 6 force the two to rotate, so that the water mist droplets and the gas are evenly mixed in the swirling airflow, so as to achieve the purpose of full reaction, improve the desulfurization efficiency, and achieve a better desulfurization effect. At the same time, the sulfide produced by the reaction and the clean gas are separated. The sulfide droplets will be deposited on the wall surface of the inner cover tube 7 and fall to the bottom space in the absorption tower body 1 due to gravity, while the clean gas will gather in the middle of the multiple swirl blades 6, so that the clean gas is discharged upward from the overflow port 8 of the inner cover tube 7.

[0029] It is worth noting that Figure 3 As shown, in this embodiment, a plurality of reinforcing ribs 12 are equidistantly fixedly connected to the bottom of the fixing ring 11, and one end of the plurality of reinforcing ribs 12 away from each other is fixedly connected to the inner wall of the absorption tower body 1, and the reinforcing ribs 12 are used to increase the structural strength of the swirl plate and the absorption tower body 1.

[0030] like Figure 5 As shown, in this embodiment, the top of the water tank 13 is fixedly connected to the housing 14, the water pump 15 is fixed in the housing 14, the input end of the water pump 15 is connected to the suction pipe 18, and one end of the suction pipe 18 extends into the interior of the water tank 13.

[0031] like Figure 4 and Figure 6 As shown, in this embodiment, a gas introduction pipe 19 is embedded in the outer surface of the absorption tower body 1, and a guide hood 9 is fixedly connected to the inner wall of the absorption tower body 1, and the guide hood 9 is located below the spray pipe 2. The area of ​​the guide hood 9 is smaller than the cross-sectional area of ​​the tower body, and there is space for sulfide droplets and impurities to pass through and fall to the bottom of the tower. An outlet 10 is provided at the top of the guide hood 9. The high-temperature sulfur-containing gas enters the tower body and floats upward. The guide hood 9 is used to guide the sulfur-containing gas so that the sulfur-containing gas is guided upward from the outlet 10 to enter the spray area. A collecting hood 20 is fixedly connected to the inner wall of the absorption tower body 1, and the collecting hood 20 is located above the outer cover tube 5. An exhaust pipe 21 is embedded in the top of the collecting hood 20, and one end of the exhaust pipe 21 extends to the outside of the absorption tower body 1.

[0032] like Figure 1 and Figure 2As shown, in this embodiment, a perspective window 22 is provided through the outer surface of the absorption tower body 1, and the perspective window 22 is used to observe the slurry in the slurry pool 24. The slurry pool 24 is provided on the inner bottom wall of the absorption tower body 1, and the slurry pool 24 is located below the gas inlet pipe 19. A discharge pipe 25 is embedded in the outer surface of the absorption tower body 1.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An absorption tower for wet desulfurization, comprising an absorption tower body (1), a gas introduction pipe (19) being embedded in the outer surface of the absorption tower body (1), and a slurry pool (24) being provided on the inner bottom wall of the absorption tower body (1), characterized in that: Two spray pipes (2) are fixedly connected to the inside of an absorption tower body (1) via a support rod, a plurality of first atomizing nozzles (3) are fixedly installed at equal intervals on the outer surface of one of the spray pipes (2), and a plurality of second atomizing nozzles (4) are installed on the outer surface of the other spray pipe (2). A water storage tank (13) is arranged on one side of the absorption tower body (1), lime water slurry is injected into the water storage tank (13), a water pump (15) is fixedly installed on the top of the water storage tank (13), an outer cover tube (5) is fixedly connected to the inside of the absorption tower body (1), a plurality of swirl blades (6) are fixedly connected to the inner surface of the outer cover tube (5), one end of the swirl blade (6) is fixedly connected to the inner cover tube (7), and an overflow port (8) is arranged inside the inner cover tube (7).

2. The wet desulfurization absorption tower according to claim 1, characterized in that: The two spray pipes (2) are arranged symmetrically, the second atomizing nozzle (4) corresponds to the first atomizing nozzle (3), the output end of the water pump (15) is connected to a water delivery pipe (16), one end of the water delivery pipe (16) is connected to two branch pipes (17), and one end of the two branch pipes (17) respectively extends into the spray pipe (2).

3. The wet desulfurization absorption tower according to claim 1, characterized in that: A fixing ring (11) is fixedly mounted on the inner wall of the absorption tower body (1), and the inner surface of the fixing ring (11) is fixedly connected to the outer surface of the outer cover tube (5). The swirl blades (6) are fixed above the spray pipe (2), and the inner cover tube (7) is located inside the outer cover tube (5).

4. The wet desulfurization absorption tower according to claim 1, characterized in that: A flow guide hood (9) is fixedly connected to the inner wall of the absorption tower body (1), and the flow guide hood (9) is located below the spray pipe (2), the cross-sectional area of ​​the flow guide hood (9) is smaller than the cross-sectional area of ​​the tower body, and an air outlet (10) is provided at the top of the flow guide hood (9). A collection hood (20) is fixedly connected to the inner wall of the absorption tower body (1), and the collection hood (20) is located above the outer cover tube (5), and an exhaust pipe (21) is embedded in the top of the collection hood (20), and one end of the exhaust pipe (21) extends to the outside of the absorption tower body (1).

5. The wet desulfurization absorption tower according to claim 3, characterized in that: A plurality of reinforcing ribs (12) are fixedly connected to the bottom of the fixing ring (11) at equal intervals, and ends of the plurality of reinforcing ribs (12) that are away from each other are fixedly connected to the inner wall of the absorption tower body (1).

6. The wet desulfurization absorption tower according to claim 1, characterized in that: The top of the water storage tank (13) is fixedly connected to the casing (14), the water pump (15) is fixed in the casing (14), the input end of the water pump (15) is connected to a suction pipe (18), and one end of the suction pipe (18) extends into the interior of the water storage tank (13).

7. The wet desulfurization absorption tower according to claim 1, characterized in that: The slurry pool (24) is located below the gas introduction pipe (19); a perspective window (22) is provided through the outer surface of the absorption tower body (1); a base (23) is provided at the bottom of the absorption tower body (1); and a discharge pipe (25) is embedded in the outer surface of the absorption tower body (1).

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