Waste gas absorption tower

Abstract

The utility model belongs to the technical field of waste gas treatment, and particularly relates to a waste gas absorption tower which comprises a tower body, a waste gas inlet formed in the tower bottom, a waste gas outlet formed in the tower top and a drying mechanism installed at the tower bottom and used for drying waste gas entering the tower bottom. A filtering mechanism for filtering the dried waste gas and a spraying mechanism for spraying and absorbing the waste gas are sequentially arranged above the drying mechanism; by arranging the drying mechanism at the tower bottom of the tower body, waste gas entering the tower body can be dried, moisture in the waste gas is removed or the waste gas is kept at extremely low moisture, and the situation that the concentration of spraying liquid is affected when the waste gas is in contact with the spraying liquid subsequently, and then the absorption efficiency and effect on the waste gas are affected is avoided; and the filtering mechanism can filter the dried waste gas, solid particles carried in the waste gas and dry particles possibly carried in the waste gas are blocked, and the situation that the particles influence the spraying efficiency and spraying equipment is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste gas treatment, in particular to a waste gas absorption tower. Background Art

[0002] The waste gas absorption tower uses the contact between gas and spray liquid through spraying to transfer the pollutants in the gas to be treated into the liquid, thereby achieving the purpose of waste gas purification. Generally, the gas-liquid reverse absorption method is adopted. The spray liquid is sprayed downward in a mist form from the top of the tower, and the waste gas to be treated flows upward from the bottom of the tower in a countercurrent manner to achieve contact with the gas and liquid.

[0003] Traditional waste gas absorption towers, such as a circulating spray type waste gas absorption tower disclosed in Chinese patent application number (2021107072369), usually do not pre-treat the waste gas when it is passed into the tower. For example, solid particulate matter and a small amount of moisture carried in the waste gas will affect the mass transfer efficiency, especially the moisture carried in the waste gas can easily cause the waste gas to contact with the spray liquid, affecting the solubility of the spray liquid. Although the dilution of the spray liquid by moisture in the waste gas can be avoided by increasing the concentration of the spray liquid, the amount of moisture in the waste gas is unknown, which makes the pre-increased concentration of the spray liquid very inconvenient to operate, and the effect is uncontrollable, which needs to be improved. Utility Model Content

[0004] The purpose of this utility model is to provide a waste gas absorption tower to address the above-mentioned technical problems, so as to achieve the effect of pre-treating the waste gas, removing the moisture of the waste gas or keeping the waste gas at extremely low moisture before contacting with the spray liquid, avoiding affecting the concentration of the spray liquid and ensuring the waste gas absorption effect.

[0005] In view of this, the utility model provides a waste gas absorption tower, comprising:

[0006] The tower body has an exhaust gas inlet at the bottom and an exhaust gas outlet at the top;

[0007] A drying mechanism is installed at the bottom of the tower and is used to dry the exhaust gas entering the bottom of the tower;

[0008] A filtering mechanism is installed above the drying mechanism and is used to filter the dried exhaust gas;

[0009] The spraying mechanism is installed above the filtering mechanism and is used to spray and absorb the exhaust gas.

[0010] In the above technical solution, further, the drying mechanism includes:

[0011] A first annular plate is mounted on the inner wall of the tower body;

[0012] The filter cartridge is mounted on the first annular plate and is located on a side of the first annular plate close to the axis;

[0013] A sealing plate is installed at one end of the filter cartridge away from the first annular plate;

[0014] An air inlet is formed at one end of the filter cartridge close to the first annular plate, and a desiccant is filled between the inner walls of the filter cartridge tower.

[0015] In the above technical solution, further, the drying mechanism further includes:

[0016] The partition is installed on the side of the filter cartridge away from the axis, and one axial end is connected to the sealing plate;

[0017] Wherein, a first air passage is formed between the partition plate and the first annular plate.

[0018] In the above technical solution, further, the filtering mechanism includes:

[0019] The filter screen is installed on the inner wall of the tower body and is arranged corresponding to the sealing plate;

[0020] The second annular plate is installed on the inner wall of the tower body and is used for installing the filter screen;

[0021] The dust collecting box is installed on the sealing plate and is located below the filter screen, and a second air passage is formed between the dust collecting box and the second annular plate;

[0022] Wherein, the diameter of the filter screen is smaller than the diameter of the dust collecting box.

[0023] In the above technical solution, further, the filtering mechanism further includes:

[0024] The connecting pipe is installed on the side of the ash collecting box and extends to the outside of the tower body to form a first flange end;

[0025] The annular grid is installed on the inner wall of the tower body and is arranged around the sealing plate.

[0026] In the above technical solution, further, the spraying mechanism includes:

[0027] The baffle is installed on the inner wall of the tower body, and is provided in plurality and staggered to form an S-shaped ascending channel;

[0028] There are multiple spray pipe assemblies, which are respectively installed at multiple inflection points of the S-shaped ascending channel;

[0029] The liquid collecting assembly is installed on the second annular plate and is used to prevent the spraying liquid from falling onto the filter screen.

[0030] In the above technical solution, further, the spray pipe assembly includes:

[0031] The spray pipe is connected to the lower part of the baffle plate through a connecting rod and extends to the outside of the tower body to form a second flange end;

[0032] The atomizing nozzle is installed on the spray pipe and is used to spray the spray liquid in an atomized manner.

[0033] In the above technical solution, further, the liquid collecting component includes:

[0034] An annular baffle is mounted on the second annular plate and is arranged around the filter screen, and forms a guide groove between the baffle and the inner wall of the tower body;

[0035] The liquid outlet pipe is installed on the side of the tower body and is connected to the guide groove;

[0036] The cover body is mounted on the annular baffle through a connecting plate and is located above the filter screen, and a third air passage is formed between the cover body and the annular baffle.

[0037] The beneficial effects of the utility model are:

[0038] 1. By setting a drying mechanism at the bottom of the tower body, the exhaust gas entering the tower body can be dried, the moisture in the exhaust gas can be removed or the moisture in the exhaust gas can be kept at an extremely low level, so as to avoid affecting the concentration of the spray liquid when it comes into contact with the spray liquid later, thereby affecting the efficiency and effect of absorbing the exhaust gas.

[0039] 2. The dried exhaust gas is filtered through a filtering mechanism to block the solid particles and dry particles that may be carried in the exhaust gas, so as to prevent the particles from affecting the spraying efficiency and the spraying equipment.

[0040] 3. By pre-treating the waste gas to remove impurities and dry it without changing the temperature or introducing other substances, the original state of harmful substances in the waste gas is maintained, providing favorable conditions for the subsequent removal of harmful substances by spraying liquid, and ensuring the efficiency and effect of waste gas absorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural diagram of the utility model;

[0042] Figure 2 It is a schematic structural diagram of the interior of the tower body of the utility model;

[0043] The symbols in the figure are: 1. tower body; 2. exhaust gas inlet; 3. drying mechanism; 30. first annular plate; 31. filter cartridge; 32. sealing plate; 33. air inlet; 34. desiccant; 35. partition; 36. first air passage; 4. filtering mechanism; 40. filter screen; 41. second annular plate; 42. ash box; 43. second air passage; 44. connecting pipe; 45. first flange end; 46. annular grid; 5. spray mechanism; 50. baffle; 51. spray pipe assembly; 510. spray pipe; 511. second flange end; 512. atomizing nozzle; 513. connecting rod; 52. liquid collecting assembly; 520. annular baffle; 521. guide groove; 522. liquid outlet pipe; 523. cover body; 524. connecting plate; 525. third air passage; 6. exhaust gas outlet. DETAILED DESCRIPTION

[0044] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0045] Example 1:

[0046] This embodiment provides a waste gas absorption tower, comprising:

[0047] The tower body 1 has an exhaust gas inlet 2 at the bottom and an exhaust gas outlet 6 at the top;

[0048] The drying mechanism 3 is installed at the bottom of the tower and is used to dry the exhaust gas entering the bottom of the tower;

[0049] The filtering mechanism 4 is installed above the drying mechanism 3 and is used to filter the dried exhaust gas;

[0050] The spray mechanism 5 is installed above the filter mechanism 4 and is used to spray and absorb the exhaust gas.

[0051] As can be seen from this embodiment, by providing a drying mechanism 3 at the bottom of the tower body 1, the exhaust gas entering the tower body 1 can be dried, moisture in the exhaust gas can be removed or the moisture in the exhaust gas can be kept at an extremely low level, thereby preventing the subsequent contact with the spray liquid from affecting the concentration of the spray liquid, thereby affecting the efficiency and effect of absorbing the exhaust gas.

[0052] Furthermore, the filtering mechanism 4 can filter the dried exhaust gas, blocking the solid particles and dry particles that may be carried in the exhaust gas, thereby preventing the particles from affecting the spraying efficiency and the spraying equipment.

[0053] Example 2:

[0054] This embodiment provides a waste gas absorption tower, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the drying mechanism 3 includes:

[0055] The first annular plate 30 is mounted on the inner wall of the tower body 1;

[0056] The filter cartridge 31 is mounted on the first annular plate 30 and is located on a side of the first annular plate 30 close to the axis;

[0057] The sealing plate 32 is mounted on the end of the filter cartridge 31 away from the first annular plate 30;

[0058] The filter cartridge 31 is provided with an air inlet 33 at one end thereof close to the first annular plate 30 , and a desiccant 34 is filled between the inner wall of the tower body 1 of the filter cartridge 31 ;

[0059] At the same time, the desiccant 34 is selected according to the composition of the exhaust gas. Those skilled in the art can select a suitable desiccant 34 according to the different exhaust gas compositions. This is an existing technology and will not be described in detail here.

[0060] As can be seen from this embodiment, by adopting the arrangement of the filter cartridge 31, the exhaust gas entering the bottom of the tower contacts the desiccant 34 in a radial flow manner through the air inlet 33, which can increase the contact area and improve the drying efficiency. Specifically, by increasing the axial dimension, the air intake area can be effectively increased, and the contact area of ​​the desiccant 34 can be increased, without being affected by the cross-sectional area of ​​the tower body 1 when the air flow is in an axial direction, which makes it impossible to increase the air intake area.

[0061] At the same time, the arrangement of the first annular plate 30 and the sealing plate 32 can better guide the exhaust gas into the desiccant 34 in a radial direction.

[0062] Example 3:

[0063] This embodiment provides a waste gas absorption tower, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the drying mechanism 3 further includes:

[0064] The partition plate 35 is installed on the side of the filter cartridge 31 away from the axis, and one axial end is connected to the sealing plate 32;

[0065] A first air passage 36 is formed between the partition plate 35 and the first annular plate 30 .

[0066] It can be seen from this embodiment that the provision of the partition 35 effectively increases the movement path of the exhaust gas in the desiccant 34, thereby effectively improving the drying time and ensuring the drying efficiency. It can remove moisture from the exhaust gas or maintain extremely low moisture, effectively ensuring the subsequent spray absorption efficiency and effect.

[0067] Example 4:

[0068] This embodiment provides an exhaust gas absorption tower, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the filtering mechanism 4 includes:

[0069] The filter screen 40 is installed on the inner wall of the tower body 1 and is arranged corresponding to the sealing plate 32;

[0070] The second annular plate 41 is mounted on the inner wall of the tower body 1 and is used to install the filter screen 40;

[0071] The dust collecting box 42 is mounted on the sealing plate 32 and is located below the filter screen 40 , and a second air passage 43 is formed between the dust collecting box 42 and the second annular plate 41 ;

[0072] The diameter of the filter 40 is smaller than the diameter of the dust collection box 42.

[0073] At the same time, the specifications and parameters of the filter 40 can be selected according to actual use. Technicians in the relevant technical field can select appropriate specifications and parameters according to different needs. This is existing technology and will not be repeated here.

[0074] It can be seen from this embodiment that by setting the filter 40 and the second annular plate 41, the exhaust gas can only enter through the filter 40, thereby effectively blocking the solid particles carried in the exhaust gas and the desiccant 34 particles that may be carried, avoiding affecting the subsequent absorption of the exhaust gas, and the ash box 42 can collect the particles blocked by the filter 40, which is convenient for subsequent cleaning.

[0075] Example 5:

[0076] This embodiment provides an exhaust gas absorption tower, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the filtering mechanism 4 further includes:

[0077] The connecting pipe 44 is installed on the side of the ash collecting box 42 and extends to the outside of the tower body 1 to form a first flange end 45;

[0078] The annular grid 46 is installed on the inner wall of the tower body 1 and is arranged around the sealing plate 32;

[0079] The first flange end 45 may be connected to an air extraction device or an air induction device.

[0080] It can be seen from this embodiment that the connecting pipe 44 facilitates connection to the exhaust device or the draft device through the first flange end 45, thereby facilitating cleaning of the ash box 42 when the exhaust gas absorption tower stops running, effectively improving convenience, and the annular grid 46 can prevent the desiccant 34 from being sucked out, and at the same time can also clean the broken desiccant 34, effectively improving the cleaning effect, ensuring the use effect of the desiccant 34, and exhausting air on one side of the ash box 42 can remove the particulate matter remaining on the filter 40, further ensuring the cleaning effect.

[0081] Example 6:

[0082] This embodiment provides an exhaust gas absorption tower, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the spray mechanism 5 includes:

[0083] Baffles 50 are mounted on the inner wall of the tower body 1 and are provided in plurality and staggered to form an S-shaped ascending channel;

[0084] There are multiple spray pipe assemblies 51, which are respectively installed at multiple inflection points of the S-shaped ascending channel;

[0085] The liquid collecting assembly 52 is mounted on the second annular plate 41 and is used to prevent the spraying liquid from falling on the filter screen 40 .

[0086] It can be seen from this embodiment that the S-shaped ascending channel is formed by alternately arranging multiple baffles 50, thereby increasing the contact time between the exhaust gas and the spray liquid, effectively improving the efficiency and effect of exhaust gas absorption, and installing the spray pipe assembly 51 at multiple inflection points of the S-shaped ascending channel, so that the exhaust gas is in a bottom-up state and the spray liquid is in a top-down state. Through the counter-contact contact, the gas absorption efficiency and effect are effectively improved;

[0087] In addition, the liquid collecting component 52 can collect the spray liquid to prevent the spray liquid from falling on the filter 40, thereby causing the spray liquid to enter the filter mechanism 4 and the drying mechanism 3, causing damage to the filter 40 and the desiccant 34, etc., thereby extending the service life.

[0088] Example 7:

[0089] This embodiment provides an exhaust gas absorption tower, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the spray pipe assembly 51 includes:

[0090] The spray pipe 510 is connected to the lower side of the baffle 50 by a connecting rod 513 and extends to the outside of the tower body 1 to form a second flange end 511;

[0091] Atomizing nozzle 512 is installed on the spray pipe 510 and is used to spray the spray liquid in an atomized manner;

[0092] The specific structure of the atomizing nozzle 512 is an existing mature technology, and technicians in the relevant technical field can understand it from the traditional atomizing nozzle 512, so it will not be described here in detail.

[0093] It can be seen from this embodiment that by adopting the atomizing nozzle 512, the spray liquid sprayed from the spray pipe 510 can be more uniform, thereby further improving the contact efficiency between the spray liquid and the exhaust gas, ensuring the absorption and purification of harmful substances in the exhaust gas, and improving the treatment effect.

[0094] Example 8:

[0095] This embodiment provides a waste gas absorption tower, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the liquid collecting assembly 52 includes:

[0096] The annular baffle 520 is mounted on the second annular plate 41 and surrounds the filter screen 40 to form a guide groove 521 with the inner wall of the tower body 1;

[0097] The liquid outlet pipe 522 is installed on the side of the tower body 1 and is connected to the guide groove 521;

[0098] The cover body 523 is mounted on the annular baffle 520 via a connecting plate 524 and is located above the filter screen 40 . A third air passage 525 is formed between the cover body 523 and the annular baffle 520 .

[0099] As can be seen from this embodiment, the annular baffle 520 can enable the guide groove 521 to carry a certain depth of spray liquid, further preventing the spray liquid from splashing on the filter 40, avoiding erosion and the like, and extending the service life. The liquid outlet pipe 522 facilitates timely discharge of the spray liquid to prevent the spray liquid from flowing over the annular baffle 520, and the cover body 523 facilitates the introduction of the spray liquid into the guide groove 521.

[0100] In addition, a circulation pump can be set between the liquid outlet pipe 522 and the spray pipe 510 at the lowest position. Specifically, by collecting the spray liquid through the liquid collecting component 52 and then guiding it back into the spray pipe 510 at the lowest position for reuse, the effective components in the spray liquid can be fully utilized to avoid wasting the spray liquid.

[0101] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A waste gas absorption tower, characterized in that: include: The tower body (1) is provided with an exhaust gas inlet (2) at the bottom and an exhaust gas outlet (6) at the top; A drying mechanism (3) is installed at the bottom of the tower and is used to dry the exhaust gas entering the bottom of the tower; A filtering mechanism (4) is installed above the drying mechanism (3) and is used to filter the dried exhaust gas; The spray mechanism (5) is installed above the filter mechanism (4) and is used for spraying and absorbing the exhaust gas.

2. The exhaust gas absorption tower according to claim 1, characterized in that: The drying mechanism (3) comprises: A first annular plate (30) is mounted on the inner wall of the tower body (1); A filter cartridge (31) is mounted on the first annular plate (30) and is located on a side of the first annular plate (30) close to the axis; A sealing plate (32) is mounted on an end of the filter cartridge (31) away from the first annular plate (30); An air inlet (33) is formed at one end of the filter cartridge (31) close to the first annular plate (30); and a desiccant (34) is filled between the inner walls of the tower body (1) of the filter cartridge (31).

3. The exhaust gas absorption tower according to claim 2, characterized in that: The drying mechanism (3) further comprises: A partition plate (35) is installed on a side of the filter cartridge (31) away from the axis, and one axial end of the partition plate is connected to the sealing plate (32); A first air passage (36) is formed between the partition plate (35) and the first annular plate (30).

4. The exhaust gas absorption tower according to claim 2, characterized in that: The filtering mechanism (4) comprises: A filter screen (40) is mounted on the inner wall of the tower body (1) and is arranged corresponding to the sealing plate (32); A second annular plate (41) is mounted on the inner wall of the tower body (1) and is used for mounting the filter screen (40); An ash collecting box (42) is mounted on the sealing plate (32) and is located below the filter screen (40), with a second air passage (43) formed between the ash collecting box and the second annular plate (41); Wherein, the diameter of the filter screen (40) is smaller than the diameter of the dust collecting box (42).

5. The exhaust gas absorption tower according to claim 4, characterized in that: The filtering mechanism (4) further comprises: A connecting pipe (44) is installed on the side of the ash collecting box (42) and extends to the outside of the tower body (1) to form a first flange end (45); The annular grid (46) is installed on the inner wall of the tower body (1) and is arranged around the sealing plate (32).

6. The exhaust gas absorption tower according to claim 4, characterized in that: The spraying mechanism (5) comprises: Baffles (50) are installed on the inner wall of the tower body (1), and are provided in plurality and staggered to form an S-shaped ascending channel; A plurality of spray pipe assemblies (51) are provided and are respectively installed at a plurality of inflection points of the S-shaped ascending channel; The liquid collecting assembly (52) is mounted on the second annular plate (41) and is used to prevent the spraying liquid from falling on the filter screen (40).

7. The exhaust gas absorption tower according to claim 6, characterized in that: The spray pipe assembly (51) comprises: The spray pipe (510) is connected to the lower side of the baffle (50) via a connecting rod (513) and extends to the outside of the tower body (1) to form a second flange end (511); The atomizing nozzle (512) is installed on the spray pipe (510) and is used for spraying the spray liquid in an atomized manner.

8. The exhaust gas absorption tower according to claim 6, characterized in that: The liquid collecting component (52) comprises: An annular baffle (520) is mounted on the second annular plate (41), is disposed around the filter screen (40), and forms a guide groove (521) with the inner wall of the tower body (1); A liquid outlet pipe (522) is installed on the side of the tower body (1) and is in communication with the guide groove (521); The cover body (523) is mounted on the annular baffle (520) via a connecting plate (524) and is located above the filter screen (40). A third air passage (525) is formed between the cover body and the annular baffle (520).

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