Washing tower

Abstract

The utility model relates to a washing tower which comprises a tower body, and the tower body is sequentially provided with an alkali washing layer, a first spraying layer, a second spraying layer, a demisting layer and a defoaming layer from bottom to top; a flue gas inlet, a water supplementing opening and an alkali liquor adding opening are formed in the peripheral wall above the alkali washing layer, a sewage draining opening is formed in the peripheral wall below the alkali washing layer, and a flue gas outlet is formed in the top of the defoaming layer; a first spraying liquid inlet is formed in the peripheral wall of the first spraying layer; a second spraying liquid inlet is formed in the peripheral wall of the second spraying layer. The alkali washing layer can be used for efficiently removing acid gas and other pollutants in the flue gas; the first spraying layer and the second spraying layer can be used for washing the flue gas for multiple times through two independent spraying systems, so that particulate matters and other harmful substances in the flue gas are effectively removed, and the purification effect is enhanced; and the arrangement of the demisting layer and the defoaming layer can further remove moisture and tiny particles in the flue gas, so that the discharged flue gas is clean and dry, the secondary pollution to the environment is reduced, and the harm of pollutants to the environment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas purification equipment, in particular to a washing tower. Background Art

[0002] With the rapid development of industrialization, the problem of flue gas emissions generated in industrial production processes has become increasingly prominent. Pollutants such as acidic gases and particulate matter contained in flue gas pose a serious threat to the environment and human health. Therefore, purifying flue gas and removing harmful substances in it has become an important issue that needs to be urgently addressed in the current environmental protection field.

[0003] Among the existing flue gas treatment technologies, scrubbers are a commonly used flue gas purification equipment and are widely used in the treatment of industrial flue gas. However, there are some obvious design defects in traditional scrubbers. First, traditional scrubbers often only use a single spray layer, which has limited treatment effects on complex and changeable flue gas components and is difficult to meet increasingly stringent environmental protection requirements. Secondly, traditional scrubbers only use a demisting layer, a spray layer, and an alkaline washing layer. When removing acidic gases and particulate matter, they are often unable to effectively remove moisture and tiny particles in the flue gas, resulting in a certain amount of pollution in the emitted flue gas. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a washing tower to overcome the deficiencies in the above-mentioned prior art.

[0005] The utility model solves the above-mentioned technical problems with the following technical solutions: a washing tower, comprising a tower body, on which an alkali washing layer, a first spraying layer, a second spraying layer, a demisting layer and a defoaming layer are sequentially arranged from bottom to top; a flue gas inlet, a water replenishing port and an alkali liquid adding port are arranged on the peripheral wall above the alkali washing layer, a sewage outlet is arranged on the peripheral wall below the alkali washing layer, and a flue gas outlet is arranged on the top of the defoaming layer; a first spray liquid inlet is arranged on the peripheral wall of the first spraying layer, a first spray head is inserted into the first spray liquid inlet; a second spray liquid inlet is arranged on the peripheral wall of the second spraying layer, a second spray head is inserted into the second spray liquid inlet.

[0006] The beneficial effects of the utility model are as follows: through the design of the alkali washing layer, the acidic gas and other pollutants in the flue gas can be efficiently removed to ensure that the discharged flue gas meets the environmental protection standards; the alkali washing layer is combined with the use of the water replenishment port and the alkali liquid addition port, and the alkali liquid concentration can be adjusted according to actual needs to further improve the removal efficiency; the first spray layer and the second spray layer are set, and through two independent spray systems, the flue gas can be washed multiple times respectively, effectively removing particulate matter and other harmful substances in the flue gas, and enhancing the purification effect; the setting of the demisting layer and the defoaming layer can further remove moisture and tiny particles in the flue gas, ensure that the discharged flue gas is clean and dry, reduce secondary pollution to the environment, reduce the harm of pollutants to the environment, and help achieve the goal of energy conservation and emission reduction. The design of the washing tower makes each functional layer clear and easy to maintain and operate; the setting of the flue gas inlet, water replenishment port, alkali liquid addition port, sewage outlet and flue gas outlet makes the entire washing process convenient to control and adjust, and improves the flexibility and reliability of the equipment.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, a PTFE wire mesh demister is provided in the demister layer.

[0009] Furthermore, an FRP baffle demister is provided in the demister layer.

[0010] Furthermore, a backwashing port is provided at the bottom of the defoaming layer, a backwashing spray head is inserted into the backwashing port, and the backwashing spray head sprays upward toward the defoaming layer.

[0011] Furthermore, an overflow port is provided on the peripheral wall of the alkaline washing layer below the smoke inlet.

[0012] Furthermore, the defoaming layer, the demisting layer, the first spraying layer, the second spraying layer and the alkali washing layer are respectively provided with manholes.

[0013] Furthermore, a liquid level gauge is arranged in the alkali washing layer, and the liquid level gauge is arranged in two groups, including a high limit liquid level gauge and a low limit liquid level gauge.

[0014] Furthermore, the alkaline washing layer is also provided with a sampling reflux port.

[0015] Furthermore, differential pressure gauges are provided in both the demisting layer and the defoaming layer.

[0016] Furthermore, the smoke inlet is arranged to be inclined downward. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0019] 1. Alkali washing layer; 11. Flue gas inlet; 12. Water replenishment port; 13. Alkali liquid addition port; 14. Sewage outlet; 15. Overflow port; 16. High limit liquid level gauge; 17. Low limit liquid level gauge; 18. Sampling reflux port; 19. Manhole; 2. First spray layer; 21. First spray liquid inlet; 22. First spray head; 31. Second spray liquid inlet; 32. Second spray head; 3. Second spray layer; 4. Demisting layer; 41. FRP baffle demister; 5. Defoaming layer; 51. Flue gas outlet; 52. PTFE wire mesh demister; 53. Backwashing port; 54. Backwashing spray head; 55. Differential pressure gauge. DETAILED DESCRIPTION

[0020] 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.

[0021] like Figure 1 As shown, embodiment 1, a washing tower, includes a tower body, on which an alkali washing layer 1, a first spray layer 2, a second spray layer 3, a demisting layer 4 and a defoaming layer 5 are sequentially arranged from bottom to top; a flue gas inlet 11, a water replenishing port 12 and an alkali liquid adding port 13 are arranged on the peripheral wall above the alkali washing layer 1, a sewage outlet 14 is arranged on the peripheral wall below the alkali washing layer 1, and a flue gas outlet 51 is arranged on the top of the defoaming layer 5; a first spray liquid inlet 21 is arranged on the peripheral wall of the first spray layer 2, and a first spray head 22 extends into the first spray liquid inlet 21; a second spray liquid inlet 31 is arranged on the peripheral wall of the second spray layer 3, and a second spray head 32 extends into the second spray liquid inlet 31.

[0022] Through the design of the alkali washing layer 1, the acidic gas and other pollutants in the flue gas can be efficiently removed to ensure that the flue gas discharged meets the environmental protection standards; the alkali washing layer 1 is combined with the use of the water replenishment port 12 and the alkali liquid addition port 13, and the alkali liquid concentration can be adjusted according to actual needs to further improve the removal efficiency; the first spray layer 2 and the second spray layer 3 are set, and through two independent spray systems, the flue gas can be washed multiple times respectively, effectively removing particulate matter and other harmful substances in the flue gas and enhancing the purification effect; the setting of the demisting layer 4 and the defoaming layer 5 can further remove moisture and tiny particles in the flue gas, ensure that the discharged flue gas is clean and dry, reduce secondary pollution to the environment, reduce the harm of pollutants to the environment, and help achieve the goal of energy conservation and emission reduction. The design of the washing tower makes each functional layer clear and easy to maintain and operate; the setting of the flue gas inlet 11, the water replenishment port 12, the alkali liquid addition port 13, the sewage outlet 14 and the flue gas outlet 51 makes the entire washing process convenient to control and adjust, and improves the flexibility and reliability of the equipment.

[0023] Embodiment 2: This embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0024] A PTFE wire mesh demister 52 is arranged in the demister layer 5 .

[0025] PTFE polytetrafluoroethylene material has excellent corrosion resistance, self-cleaning, non-stickiness and hydrophobicity. It can not only effectively remove droplets with a diameter greater than 3-5μm, but also filter out smaller and tiny liquid foam suspended in the airflow, ensuring the quality of the gas at the outlet of the scrubber and improving the efficiency and stability of the entire process. By setting up a demister, the flow state of the gas in the tower can be optimized, and the liquid entrainment phenomenon can be reduced, thereby extending the service life of the scrubber and related equipment and reducing maintenance costs.

[0026] Embodiment 3, this embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0027] An FRP baffle demister 41 is provided in the demister layer 4 .

[0028] The FRP baffle demister 41 installed in the scrubbing tower can efficiently separate and remove the droplets entrained in the gas in the scrubbing tower, ensuring that the gas discharged from the scrubbing tower meets environmental protection standards. This not only helps to protect the environment and prevent the negative impact of waste gas emissions on the ecological environment, but also helps to improve the overall efficiency and economic benefits of the production process.

[0029] Embodiment 4: This embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0030] A backwashing port 53 is provided at the bottom of the defoaming layer 5 , and a backwashing spray head 54 extends into the backwashing port 53 . The backwashing spray head 54 sprays upward toward the defoaming layer 5 .

[0031] In the washing tower, a backwashing spray head 54 is arranged between the FRP baffle demister 41 and the PTFE wire mesh demister 52, and sprays upward toward the PTFE wire mesh demister 52, so that cleaning and maintenance work can be performed more effectively. This spraying method can ensure that the cleaning liquid fully covers and flushes the surface of the PTFE wire mesh demister 52. In addition, using the backwashing spray head 54 for cleaning can prevent the blockage and failure of the FRP baffle demister 41 and the PTFE wire mesh demister 52. This is of great significance for maintaining the stable operation of the washing tower and reducing maintenance costs.

[0032] Embodiment 5, this embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0033] An overflow port 15 is provided on the peripheral wall of the alkaline washing layer 1 below the flue gas inlet 11. When the washing tower is working, a certain amount of liquid will be filled inside to absorb, neutralize or wash the pollutants in the gas passing through the tower body. By adjusting the opening degree of the overflow port 15, the height of the liquid level in the tower can be controlled, thereby ensuring that the liquid level in the tower remains within a stable range. When the liquid in the washing tower exceeds the set liquid level due to some reason, such as excessive liquid inflow, poor drainage, etc., the excess liquid will flow out through the overflow port 15 to prevent the liquid from overflowing from the top of the tower or other parts, causing environmental pollution or equipment damage. In some cases, the pressure in the washing tower may change. By adjusting the opening degree of the overflow port 15, the pressure in the tower can be balanced to a certain extent to ensure the normal operation of the washing tower.

[0034] Embodiment 6: This embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0035] The defoaming layer 5, the demisting layer 4, the first spraying layer 2, the second spraying layer 3 and the alkali washing layer 1 are respectively provided with a manhole 19. In a specific implementation, a manhole 19 and / or a sight glass can be provided, and the manhole 19 provides a convenient access for the washing tower, so that the operator can enter the tower to inspect, clean, repair or replace internal components, such as fillers, nozzles, etc. This is very important to ensure the long-term stable operation of the washing tower and maintain its high efficiency. The sight glass facilitates the operator to observe the situation inside the washing tower from the outside of the washing tower.

[0036] Embodiment 7, this embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0037] A liquid level gauge is provided in the alkali washing layer 1. There are two groups of liquid level gauges, including a high limit liquid level gauge 16 and a low limit liquid level gauge 17. If the liquid level in the alkali washing layer 1 is too high, liquid overflow may occur, causing environmental pollution and equipment damage. If the liquid level is too low, the washing effect will be affected. The high limit liquid level gauge 16 and the low limit liquid level gauge 17 can ensure accurate monitoring and control of the liquid level in the washing tower to avoid excessively high or low liquid levels.

[0038] Embodiment 8: This embodiment is a further improvement on the basis of Embodiment 1, and its details are as follows:

[0039] The alkaline washing layer 1 is also provided with a sampling reflux port 18. It is possible to obtain real-time liquid samples inside the washing tower so as to monitor and analyze the washing effect, pollutant types and concentrations. Through the sampling reflux port 18, the operator can extract washing liquid samples regularly or in real time to evaluate the treatment effect of the washing tower on the exhaust gas, and adjust the operating parameters or take other optimization measures as needed.

[0040] Embodiment 9: This embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0041] Differential pressure gauges 55 are provided in both the demisting layer 4 and the defoaming layer 5. They are used to measure the pressure difference between different positions inside the washing tower. The pressure data inside the washing tower can be obtained in real time, which helps the operator to understand the working status of the washing tower in time, and make adjustments and optimizations as needed to ensure efficient and stable operation of the washing tower.

[0042] Embodiment 10: This embodiment is a further improvement based on any one of Embodiments 1 to 9, and its details are as follows:

[0043] The smoke inlet 11 is arranged to be tilted downward so that the incoming smoke can quickly contact the liquid.

[0044] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A washing tower, characterized in that: The tower body comprises an alkali washing layer (1), a first spraying layer (2), a second spraying layer (3), a demisting layer (4) and a defoaming layer (5) arranged in sequence from bottom to top; a smoke inlet (11), a water replenishing port (12) and an alkali liquid adding port (13) are arranged on the upper peripheral wall of the alkali washing layer (1), a sewage outlet (14) is arranged on the lower peripheral wall of the alkali washing layer (1), and a smoke outlet (51) is arranged on the top of the defoaming layer (5); a first spraying liquid inlet (21) is arranged on the peripheral wall of the first spraying layer (2), and a first spraying head (22) extends into the first spraying liquid inlet (21); a second spraying liquid inlet (31) is arranged on the peripheral wall of the second spraying layer (3), and a second spraying head (32) extends into the second spraying liquid inlet (31).

2. A washing tower according to claim 1, characterized in that: A PTFE wire mesh demister (52) is arranged in the defoaming layer (5).

3. A washing tower according to claim 1, characterized in that: The demisting layer (4) is provided with an FRP baffle demister (41).

4. A washing tower according to claim 1, characterized in that: A backwashing port (53) is provided at the bottom of the defoaming layer (5), a backwashing spray head (54) extends into the backwashing port (53), and the backwashing spray head (54) sprays upwards toward the defoaming layer (5).

5. A washing tower according to claim 1, characterized in that: An overflow port (15) is provided on the peripheral wall of the alkali washing layer (1) below the flue gas inlet (11).

6. A washing tower according to claim 1, characterized in that: The defoaming layer (5), the demisting layer (4), the first spraying layer (2), the second spraying layer (3) and the alkali washing layer (1) are each provided with a manhole (19).

7. A washing tower according to claim 1, characterized in that: A liquid level meter is arranged in the alkali washing layer (1), and the liquid level meter is arranged in two groups, including a high limit liquid level meter (16) and a low limit liquid level meter (17).

8. A washing tower according to claim 1, characterized in that: The alkali washing layer (1) is also provided with a sampling reflux port (18).

9. A washing tower according to claim 1, characterized in that: A differential pressure gauge (55) is provided in both the demisting layer (4) and the defoaming layer (5).

10. A washing tower according to any one of claims 1 to 9, characterized in that: The smoke inlet (11) is arranged to be inclined downward.

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