Fine cleaning device for tail gas discharged by high tower

Abstract

The utility model relates to the technical field of tail gas treatment, in particular to a fine washing device for tail gas discharged by a high tower, which comprises a granulation room and a dust collecting box body arranged above the granulation room, a plurality of axial flow fans are arranged at the upper end of the dust collecting box body at equal intervals, structured packing is arranged between the lower end of the dust collecting box body and the granulation room, and the upper end of the dust collecting box body is connected with the granulation room. An inner cavity of the structured packing is filled with a trailing removing device, and a water curtain wall is arranged at the lower end of the structured packing. According to the utility model, the tail gas fine washing device mainly comprises four parts, namely the granulation room, the dust collection box body, the water curtain wall and the circulating water tank, and meanwhile, the regular packing, the trapezoidal absorption packing and the circulating spraying pipeline are arranged in the device, so that the waste gas can be subjected to multi-stage gas washing and filtering treatment; the secondary pollution of dust-containing waste gas discharge to the environment is reduced, meanwhile, aerosol contact and collision are enhanced, condensation and rapid sinking of aerosol particles are promoted, then the aerosol particles are washed with circulating liquid, and the purpose of aerosol removal is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to a tail gas fine washing device used for high tower discharge. Background Art

[0002] With the rapid development of social economy, energy crisis and environmental pollution are becoming more and more serious. It not only destroys the living environment of the whole society, but also threatens the life safety of the people. Energy saving and consumption reduction and environmental governance are imperative. Urea and compound fertilizer granulation towers are key equipment in production. They use natural ventilation and mechanical ventilation to solidify and cool the melt in the process of falling. Therefore, the exhaust gas at the top of the high tower will carry a considerable amount of urea, compound fertilizer dust, water vapor and other floating objects. Most of these emissions will fall on the ground within a few kilometers nearby, not only corroding objects, but also endangering the growth of crops, causing the branches and leaves of nearby trees to wither, destroying the greening of the factory area and clean and civilized production. This pollution also damages the health of nearby personnel. At the same time, this part of the material is discharged in vain, which increases consumption, weakens the competitiveness of enterprises in the market, and limits the survival and development of enterprises. Therefore, it is imperative to recycle the dust from high tower granulation, which is an important project that is beneficial to enterprises, social environment, energy conservation and environmental protection.

[0003] The pollution of the environment caused by the dust discharged from the top of the high-tower granulation tower has long been a problem that has plagued nitrogen fertilizer companies. At present, most of the dust emissions from high-tower granulation are still discharged directly without any treatment. The original design did not consider dust treatment devices. Environmental monitoring data shows that high-concentration dust is discharged directly into the atmosphere at a high flow rate of natural ventilation, which brings many problems:

[0004] First, it causes pollution to the surrounding environment: dust emissions have a serious impact on the growth of crops, flowers, plants and trees around the factory, roads and buildings are corroded, and surrounding residents are also affected, especially in spring and autumn when the air pressure is low and the wind speed is slow. Dust will not be carried away by the wind and is easy to settle and accumulate around the factory, causing pollution to the surrounding environment.

[0005] Second, environmental emissions exceed standards.

[0006] Third, output loss: high tower granulation emits high dust concentration, and the daily output loss is also large.

[0007] In view of this, it is particularly important to design and manufacture a high-tower exhaust gas fine washing device that can effectively remove dust-containing exhaust gas and aerosols and realize resource recycling in exhaust gas treatment. Utility Model Content

[0008] The purpose of the utility model is to solve the technical defects of the prior art in the above-mentioned records and to propose a fine washing device for tail gas discharged from a high tower.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] A device for fine washing of tail gas discharged from a high tower comprises a granulation room and a dust collecting box arranged above the granulation room, a plurality of axial flow fans are equidistantly installed at the upper end of the dust collecting box, a structured filler is installed between the lower end of the dust collecting box and the granulation room, the inner cavity of the structured filler is filled with a tail removal device, a water curtain wall is arranged at the lower end of the structured filler, a liquid guide groove is arranged between the water curtain wall and the inner cavity of the structured filler, an absorption platform is installed on the inner side of the water curtain wall, a trapezoidal absorption filler is installed between the water curtain wall and the absorption platform, a circulating water tank is arranged on the inner side of the granulation room below the water curtain wall, and a circulating spray pipeline is arranged between the water curtain wall, the dust collecting box and the circulating water tank.

[0011] As a further description of the above technical solution:

[0012] The circulating spray pipeline includes an atomizing absorption nozzle installed between the structured filler and the liquid guide groove, a surrounding absorption nozzle installed on the inner side of the water curtain wall and with the nozzle facing the trapezoidal absorption filler, a spray nozzle installed in the middle of the inner side of the dust collection box, a cleaning nozzle installed on the upper inner side of the dust collection box, and a circulating pump installed on the circulating water tank and establishing a liquid connection with the surrounding absorption nozzles, the atomizing absorption nozzle, the spray nozzle and the cleaning nozzle.

[0013] As a further description of the above technical solution:

[0014] The upper end of the circulating water tank and the lower end of the water curtain wall are provided with a collecting trough, and the lower end of the collecting trough is located inside the circulating water tank and is provided with a filter screen cylinder connected with the collecting trough.

[0015] As a further description of the above technical solution:

[0016] The outer diameter of the collecting trough is greater than the maximum outer diameter of the water curtain wall, and the upper end portion of the collecting trough is in an outwardly bent state.

[0017] As a further description of the above technical solution:

[0018] A W-type water collector is installed on the inner side of the dust collection box below the cleaning nozzle, and the W-type water collector is connected to the filter screen cylinder through a conduit.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0020] In the utility model, the tail gas fine washing device is mainly composed of four parts: a granulation room, a dust collection box, a water curtain wall and a circulating water tank. At the same time, structured fillers, trapezoidal absorption fillers and circulating spray pipelines are arranged inside the device. When the axial flow fan and the circulating pump are powered on, the device will operate normally, and the discharged air can pass through the water curtain wall, the trapezoidal absorption fillers, the surrounding absorption nozzles, the atomizing absorption nozzles, the tail removal device, the structured fillers, the spray nozzles and the cleaning nozzles from bottom to top in sequence. The multiple nozzles can perform multi-stage cleaning and absorption treatment on the dust-containing exhaust gas. At the same time, the soaked trapezoidal absorption fillers and the structured fillers can perform wet filtration treatment on the dust-containing exhaust gas, remove solid impurities in the exhaust gas and impact to form aerogel. This structure can perform multi-stage washing and filtering treatment on the exhaust gas, reduce the secondary pollution of the dust-containing exhaust gas to the environment, and at the same time strengthen the contact and collision of aerosols, promote the condensation and rapid sinking between aerosol particles, and then rinse with circulating liquid to achieve the goal of removing aerosols. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model is a simplified structural diagram of the tail gas fine washing device for high-tower discharge.

[0022] Legend:

[0023] 1. Water curtain wall; 2. Absorption platform; 3. Trapezoidal absorption filler; 4. Absorption nozzles all around; 5. Atomization absorption nozzle; 6. Tailing removal device; 7. Structured filler; 8. Spray nozzle; 9. W-type water collector; 10. Cleaning nozzle; 11. Axial flow fan; 12. Dust collection box; 13. Liquid guide trough; 14. Collection trough; 15. Circulating water tank; 16. Circulating pump; 17. Filter screen cylinder; 18. Granulation room. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1The utility model provides a technical solution: a high-tower exhaust gas fine washing device, comprising a granulation room 18 and a dust collection box 12 arranged above the granulation room 18, a plurality of axial flow fans 11 are equidistantly installed on the upper end of the dust collection box 12, a structured filler 7 is installed between the lower end of the dust collection box 12 and the granulation room 18, the inner cavity of the structured filler 7 is filled with a tail removal device 6, a water curtain wall 1 is arranged at the lower end of the structured filler 7, a liquid guide groove 13 is installed between the water curtain wall 1 and the inner cavity of the structured filler 7, an absorption platform 2 is installed on the inner side of the water curtain wall 1, a trapezoidal absorption filler 3 is installed between the water curtain wall 1 and the absorption platform 2, a circulating water tank 15 is arranged on the inner side of the granulation room 18 below the water curtain wall 1, and a circulating spray pipeline is arranged between the water curtain wall 1, the dust collection box 12 and the circulating water tank 15.

[0026] Specifically, the circulating spray pipeline includes an atomizing absorption nozzle 5 installed between the structured filler 7 and the liquid guide groove 13, a surrounding absorption nozzle 4 installed on the inner side of the water curtain wall 1 and with the nozzle facing the trapezoidal absorption filler 3, a spray nozzle 8 installed in the middle of the inner side of the dust collection box 12, a cleaning nozzle 10 installed in the upper inner side of the dust collection box 12, and a circulating pump 16 installed on the circulating water tank 15 and establishing a liquid connection with the surrounding absorption nozzles 4, the atomizing absorption nozzle 5, the spray nozzle 8 and the cleaning nozzle 10, wherein a collecting trough 14 is installed at the upper end of the circulating water tank 15 and the lower end of the water curtain wall 1, and the lower end of the collecting trough 14 is located on the inner side of the circulating water tank 15 and is installed with a filter screen cylinder 17 connected to the collecting trough 14.

[0027] At the same time, the outer diameter of the collecting trough 14 is larger than the maximum outer diameter of the water curtain wall 1, which can prevent the water curtain on the water curtain wall 1 from overflowing into the circulating water tank 15 and the granulation room 18, and the upper end of the collecting trough 14 is bent outward, which can further increase the area of ​​the collecting trough 14 for collecting the spray liquid.

[0028] Specifically, a W-type water collector 9 is installed on the inner side of the dust collection box 12 below the cleaning nozzle 10. The W-type water collector 9 establishes a liquid connection with the filter screen cylinder 17 through a conduit. The setting of the W-type water collector 9 can, on the one hand, effectively reduce the generation of spray water mist on the upper layer of the dust collection box 12, thereby reducing the discharge of spray water mist through the axial flow fan 11. On the other hand, the spray liquid can be quickly recovered into the filter screen cylinder 17 and the circulating water tank 15 to realize the circulating supply of the spray liquid.

[0029] Working principle: When in use, the axial flow fan 11 on the dust collection box 12 and the circulating pump 16 on the circulating water tank 15 will be powered on and work. At this time, a negative pressure environment will be generated in the dust collection box 12. At this time, an airflow from bottom to top will be generated in the exhaust gas fine washing device. At the same time, the spray liquid inside the circulating water tank 15 can enter the surrounding absorption nozzles 4, atomizing absorption nozzles 5, spray nozzles 8 and cleaning nozzles 10 respectively, forming two groups of spray areas in the water curtain wall 1 and the dust collection box 12. At the same time, under the action of gravity, the spray liquid can pass through the structured filler 7, the tail removal device 6, the trapezoidal absorption filler 3 and the filter screen cylinder 17 in turn into the circulating water tank 15, so as to realize the circulation and recovery of the spray liquid and create a The dust-containing waste gas generated in the intergranular space 18 can pass through the water curtain wall 1, the trapezoidal absorption filler 3, the surrounding absorption nozzles 4, the atomizing absorption nozzles 5, the tailing removal device 6, the structured filler 7, the spray nozzles 8 and the cleaning nozzles 10 in sequence upwards, wherein the spray liquid flowing on the water curtain wall 1 can perform the first step of cleaning and absorption treatment on the waste gas, while the surrounding absorption nozzles 4, the atomizing absorption nozzles 5, the spray nozzles 8 and the cleaning nozzles 10 can perform continuous four-stage cleaning and absorption treatment on the dust-containing waste gas, and the soaked trapezoidal absorption filler 3 and the structured filler 7 can perform wet filtration treatment on the dust-containing waste gas to remove solid impurities in the waste gas and impact to form aerogel, and the waste gas after multi-stage treatment can be discharged into the external environment through the axial flow fan 11.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fine washing device for exhaust gas discharged from a high tower, comprising a granulation room (18) and a dust collection box (12) arranged above the granulation room (18), characterized in that: A plurality of axial flow fans (11) are equidistantly mounted on the upper end of the dust collection box (12); a structured filler (7) is mounted between the lower end of the dust collection box (12) and the granulation room (18); the inner cavity of the structured filler (7) is filled with a tail removal device (6); a water curtain wall (1) is disposed at the lower end of the structured filler (7); a liquid guide groove (13) is disposed between the water curtain wall (1) and the inner cavity of the structured filler (7); an absorption platform (2) is mounted on the inner side of the water curtain wall (1); a trapezoidal absorption filler (3) is mounted between the water curtain wall (1) and the absorption platform (2); a circulating water tank (15) is disposed below the water curtain wall (1) and located on the inner side of the granulation room (18); and a circulating spray pipeline is disposed between the water curtain wall (1), the dust collection box (12) and the circulating water tank (15).

2. The device for fine washing of tail gas discharged from a high tower according to claim 1, characterized in that: The circulating spray pipeline comprises an atomizing absorption nozzle (5) installed between the structured filler (7) and the liquid guide groove (13), a surrounding absorption nozzle (4) installed on the inner side of the water curtain wall (1) and with the nozzle facing the trapezoidal absorption filler (3), a spray nozzle (8) installed in the middle of the inner side of the dust collection box (12), a cleaning nozzle (10) installed in the upper part of the inner side of the dust collection box (12), and a circulating pump (16) installed on the circulating water tank (15) and establishing a liquid circuit connection with the surrounding absorption nozzle (4), the atomizing absorption nozzle (5), the spray nozzle (8) and the cleaning nozzle (10).

3. The device for fine washing of tail gas discharged from a high tower according to claim 2, characterized in that: A collecting trough (14) is installed at the upper end of the circulating water tank (15) and the lower end of the water curtain wall (1); a filter screen cylinder (17) connected to the collecting trough (14) is installed at the lower end of the collecting trough (14) and is located inside the circulating water tank (15).

4. The device for fine washing of tail gas discharged from a high tower according to claim 3, characterized in that: The outer diameter of the collecting trough (14) is greater than the maximum outer diameter of the water curtain wall (1), and the upper end portion of the collecting trough (14) is in an outwardly bent state.

5. The device for fine washing of tail gas discharged from a high tower according to claim 1 or 2, characterized in that: A W-type water collector (9) is installed on the inner side of the dust collection box (12) below the cleaning nozzle (10), and the W-type water collector (9) is connected to the filter screen cylinder (17) through a conduit to establish a fluid path.

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