Industrial tail gas and haze treatment device

Abstract

The invention relates to an industrial tail gas and haze treatment device, and belongs to the field of tail gas treatment devices. Comprising a tower body, a tail gas input pipe and a discharge header pipe, the tower body is arranged in the sewage treatment tank, a dust treatment layer, a treatment layer and a water supplementing system are arranged in the tower body, the dust treatment layer is a bottom layer of the tower body, the bottom of the dust treatment layer is communicated with the bottom of the sewage treatment tank, the tail gas input pipe penetrates through the tower body and is arranged above the dust treatment layer, the treatment layer is arranged above the tail gas input pipe, and the water supplementing system is arranged above the tail gas input pipe. The discharge header pipe penetrates through the treatment layer and is fixed in the center of the tower body, the bottom end of the discharge header pipe is immersed into the liquid of the dust treatment layer, and the top of the discharge header pipe is connected with the atmosphere. Dust in the dust tail gas is removed through water film and differentiation layering bubble cleaning, the sewage treatment pond is adopted as treatment liquid of the water film and a treatment layer, pollutants in the tail gas are removed at the same time, and a dosing device and liquid level control do not need to be independently arranged; the method plays a decisive role in radical treatment of current industrial haze.

Description

Technical Field

[0001] The present invention relates to an industrial tail gas and haze treatment device, belonging to the field of tail gas treatment devices. Background Art

[0002] Currently, when common tail gas treatment devices handle the dust mixed in the tail gas, various types and methods such as cyclone dust removal, bag dust removal, electrostatic dust removal, atomization dust removal, and water film dust removal are mostly adopted. There are problems of high cost and incomplete treatment.

[0003] Cyclone dust removal has low efficiency for small particles, large pressure drop, high energy consumption, is not applicable to viscous and wet dust, has a risk of secondary dust emission, and has a limited scope of application. Although bag dust removal has significant advantages in terms of efficiency > 99% and applicable particle size range of 0.1 - 100 μm, its disadvantages are mainly reflected in high operating costs due to large air resistance, limited environmental adaptability, and complex maintenance. The disadvantages of electrostatic dust removal are concentrated in high cost, narrow dust adaptability, and complex maintenance. The disadvantages of atomization dust removal are concentrated in high resource dependence on water and electricity, limited environmental adaptability in terms of temperature, humidity, dust characteristics, and risk of secondary pollution; these methods have problems of incomplete dust removal and high dust removal cost. How to improve the dust removal effect while reducing the dust removal cost is the mainstream direction of industrial haze treatment, which conforms to the current industrial development trend of energy conservation, consumption reduction, and green production. Summary of the Invention

[0004] According to the problems described in the background, the problems to be solved by the present invention are:

[0005] Design an industrial tail gas and haze treatment device with low-cost dust removal.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An industrial waste gas and haze treatment device, comprising a tower body, a waste gas input pipe and a discharge main pipe; the tower body is arranged in a sewage treatment pool, and a dust treatment layer, a treatment layer and a water replenishment system are provided inside the tower body. The dust treatment layer is the bottom layer of the tower body, and the bottom of the dust treatment layer is communicated with the bottom of the sewage treatment pool. The waste gas input pipe passes through the tower body and is arranged above the dust treatment layer, and the mouth of the waste gas input pipe points to the dust treatment layer; one or more layers above the waste gas input pipe are treatment layers. The discharge main pipe passes through the treatment layer and is fixed at the center of the tower body. The bottom end of the discharge main pipe is immersed in the liquid of the dust treatment layer, and the top of the discharge main pipe is connected to the atmosphere; air outlet holes are opened on the tower body wall between the dust treatment layer and the treatment layer, and air inlet holes are provided on the tower body wall on the side of the treatment layer, and the liquid in the treatment layer submerges the air inlet holes. An overflow exhaust port is provided on the pipe wall of the discharge main pipe above the treatment layer; the air inlet holes and the air outlet holes are connected by an exhaust gas transmission pipeline, and the section of the exhaust gas transmission pipeline connected to the air inlet hole is arranged obliquely upward, and the height of the high end of the section connected to the air inlet hole is higher than the height of the bottom of the overflow exhaust port to prevent the liquid in the treatment layer from flowing back into the exhaust gas transmission pipeline; the water replenishment system includes a water replenishment main pipe, a water replenishment branch pipe and a water replenishment pump. One end of the water replenishment main pipe is connected to the water replenishment pump, and the other end enters the inside of the discharge main pipe from the bottom of the discharge main pipe. The water replenishment pump is a submersible pump and is arranged at the bottom of the dust treatment layer. One end of the water replenishment branch pipe is connected to the water replenishment main pipe, and the other end passes through the discharge main pipe to the treatment layer. The water replenishment branch pipe is arranged below the overflow exhaust port, and a water discharge port is opened on the side pipe wall of the water replenishment branch pipe. Setting the present invention on the sewage treatment pool has many conveniences. When most of the dust is absorbed in the dust treatment layer section, the deposited dust does not need to be treated separately, and the sewage treatment pool has a mature treatment plan for the sediment. The treatment layer also does not need to be provided with a separate chemical dosing mechanism. By means of the existing chemical dosing treatment device in the sewage treatment pool, while reducing the manufacturing cost of the present invention, the use difficulty of the present invention is simplified. The bottom end of the discharge main pipe is immersed in the liquid, so that when the waste gas is sprayed onto the dust treatment layer, it will not be directly discharged from the discharge main pipe, and the bottom liquid forms a liquid seal for the discharge main pipe.

[0008] Preferably, a bubble rupture plate is provided above the treatment layer. The bubble rupture plate is fixed above the air inlet hole, and the liquid in the treatment layer submerges the bubble rupture plate. The bubble rupture plate completely covers the inside of the treatment layer. The small and dense holes on the bubble rupture plate further reduce the size of the waste gas bubbles, enabling the waste gas to come into more contact with the liquid in the treatment layer, and improving the effects of dust treatment and waste gas treatment.

[0009] Preferably, the waste gas enters the exhaust gas transmission pipeline from the air outlet hole, then enters each treatment layer from the air inlet hole, is cleaned and decontaminated by the liquid in the treatment layer, reaches the overflow exhaust port, and is then discharged to the atmosphere through the discharge main pipe. Multiple treatment layers can be set according to requirements to improve the treatment efficiency.

[0010] Preferably, the air outlet holes and air inlet holes are arranged around the tower wall in a corresponding manner, and the corresponding air outlet holes and air inlet holes are connected through an exhaust gas pipeline. The circumferential arrangement improves the air intake effect while making the air intake more dispersed and the treatment effect better.

[0011] Preferably, the terminal of the inlet pipeline of the makeup water pump is located in the upper middle part of the liquid in the dust treatment layer. The dust absorbed by the liquid in the dust treatment layer deposits towards the bottom, away from the dust treatment section or the sewage pool far from the exhaust gas input pipe. The liquid in its upper middle part basically does not contain solid particles and will not damage the service life of the submersible pump.

[0012] Preferably, a plurality of makeup water branch pipes are arranged around the makeup water main pipe, and the outlet positions of each makeup water branch pipe are the same, ensuring that the discharged water can form a circumferential flow in the circular treatment layer.

[0013] The coal-fired steam boilers in enterprises, the tail gases in the drying industry, and the tail gases with large exhaust volumes are introduced into the differentiation gas box for the first water film dust removal. The tail gas after the first dust removal is decomposed and differentiated, and enters the rotating water layer of the treatment layer from numerous air outlet holes. Heat dissipation fins can be provided on the outer wall of the diversion pipe according to the tail gas temperature to reduce the water layer temperature and the speed of water evaporation. Place the inlet of the makeup water pump in the upper middle part of the water pool, keeping a distance from the return water after cleaning the bubbles, and reserving enough sedimentation space. Regularly detect the content of the decontaminant in the water and the sewage sedimentation situation. The treated tail gas discharged is uploaded to the local environmental protection supervision department in real time through electronic detection.

[0014] The beneficial effects of the present invention are as follows:

[0015] The present invention removes the dust in the dust-containing tail gas through the water film and differentiated stratified bubbles, and has excellent dust treatment effect. The sewage treatment pool is used as the treatment liquid for the water film and the treatment layer, removing the pollutants in the tail gas at the same time, and there is no need to separately set a dosing device and a liquid level control; the cost is low, and at the same time, it has an excellent tail gas treatment effect, which plays a decisive role in the radical treatment of the current industrial haze. Description of the Drawings

[0016] Figure 1 Schematic diagram of the present invention

[0017] In the figure: 1 is the tower body; 2 is the exhaust gas input pipe; 3 is the discharge main pipe; 4 is the sewage treatment pool; 5 is the makeup water pump; 11 is the dust treatment layer; 12 is the treatment layer; 121 is the bubble rupture plate; 13 is the air outlet hole; 14 is the air inlet hole; 15 is the exhaust gas pipeline; 151 is the air inlet hole connection section; 31 is the overflow exhaust port; 51 is the makeup water main pipe; 52 is the makeup water branch pipe; 521 is the water outlet; 53 is the inlet pipeline. Detailed Embodiments

[0018] Example 1

[0019] An industrial tail gas and haze treatment device, comprising a tower body 1, a tail gas input pipe 2 and a discharge main pipe 3; the tower body 1 is arranged in a sewage treatment tank 4, and a dust treatment layer 11, a treatment layer 12 and a water replenishing system are provided in the tower body 1. The dust treatment layer 11 is the bottom layer of the tower body 1, and the bottom of the dust treatment layer 11 is communicated with the bottom of the sewage treatment tank 4. The tail gas input pipe 2 passes through the tower body 1 and is arranged above the dust treatment layer 11, and the nozzle of the tail gas input pipe 2 points to the dust treatment layer 11; one or more layers above the tail gas input pipe 2 are treatment layers 12, and multiple treatment layers 12 are arranged in parallel; the discharge main pipe 3 passes through the treatment layer 12 and is fixed at the center of the tower body 1. The bottom end of the discharge main pipe 3 is immersed in the liquid of the dust treatment layer 11, and the top of the discharge main pipe 3 is connected to the atmosphere; an air outlet hole 13 is opened on the wall of the tower body 1 between the dust treatment layer 11 and the treatment layer 12, and an air inlet hole 14 is provided on the wall of the tower body 1 on the side of the treatment layer 12, and the liquid in the treatment layer 12 submerges the air inlet hole 14. An overflow exhaust port 31 is provided on the pipe wall of the discharge main pipe 3 above the treatment layer 12; the air inlet hole 14 and the air outlet hole 13 are connected by an exhaust gas conveying pipeline 15, and the connecting section 151 of the exhaust gas conveying pipeline 15 with the air inlet hole is arranged obliquely upward, and the height of the high position end of the air inlet hole connecting section 151 is higher than the height of the bottom of the overflow exhaust port 31 to prevent the liquid in the treatment layer 12 from flowing back into the exhaust gas conveying pipeline 15; the water replenishing system includes a water replenishing main pipe 51, a water replenishing branch pipe 52 and a water replenishing pump 5. One end of the water replenishing main pipe 51 is connected to the water replenishing pump 5, and the other end enters the inside of the discharge main pipe 3 from the bottom of the discharge main pipe 3. The water replenishing pump 5 is a submersible pump and is arranged at the bottom of the dust treatment layer 11. One end of the water replenishing branch pipe 52 is connected to the water replenishing main pipe 51, and the other end passes through the discharge main pipe 3 to the treatment layer 12. The water replenishing branch pipe 52 is arranged below the overflow exhaust port 31, and a water discharge port 521 is opened on the side wall of the water replenishing branch pipe 52.

[0020] A bubble rupture plate 121 is provided above the treatment layer 12. The bubble rupture plate 121 is fixed above the air inlet hole 14, and the liquid in the treatment layer 12 submerges the bubble rupture plate 121.

[0021] The tail gas enters the exhaust gas conveying pipeline 15 from the air outlet hole 13, then enters each treatment layer 12 from the air inlet hole 14, is cleaned and decontaminated by the liquid in the treatment layer 12 to the overflow exhaust port 31, and then is discharged to the atmosphere through the discharge main pipe 3.

[0022] The air outlet hole 13 and the air inlet hole 14 are arranged around the tower wall and correspond to each other, and the corresponding air outlet hole 13 and air inlet hole 14 are connected by an exhaust gas conveying pipeline 15.

[0023] The terminal of the inlet pipeline 53 of the water replenishing pump 5 is located in the upper middle part of the liquid in the dust treatment layer 11.

[0024] A plurality of water replenishing branch pipes 52 are arranged around the water replenishing main pipe 51, and the outlet positions 521 of each water replenishing branch pipe 52 are the same, ensuring that the discharged water can form a circumferential flow within the circular treatment layer 12.

[0025] The tail gas is transported to the dust treatment layer 11 through the tail gas transport pipe 2. The tail gas blows along the pipe towards the surface of the water layer in the dust treatment layer 11. Most of the dust in the tail gas is absorbed by the water layer. A small amount of dust is input into the treatment layer 12 along with the tail gas through the waste gas transport pipe 15. The large air bubbles are split into small air bubbles by the bubble rupture plate 121, enabling the tail gas to fully react and be purified with the treatment liquid in the treatment layer, meeting the emission standards. The small amount of dust entrained in the tail gas is also absorbed into the treatment liquid. The purified tail gas enters the discharge main pipe from the overflow exhaust port 31 and is discharged into the atmosphere. The treatment liquid in the treatment layer 12 is replenished to the treatment layer 12 from the dust treatment layer 11 or the sewage treatment tank 4 by the water replenishing pump 5. The water replenishing branch pipes 52 drive the treatment liquid to flow circumferentially in the treatment layer, agitating the water layer, preventing the absorbed dust from settling and accumulating at the bottom, and increasing the operating perimeter of the treatment device. The water replenishing system continuously replenishes water, causing the liquid level of the treatment liquid to continuously rise. Eventually, it overflows from the overflow exhaust port 31 into the discharge main pipe 3 and flows to the lower dust treatment layer 11.

Claims

1. An industrial waste gas and haze treatment device, comprising a tower body (1), a waste gas input pipe (2) and a main discharge pipe (3); characterized in that, The tower body (1) is arranged in the sewage treatment tank (4). A dust treatment layer (11), a treatment layer (12) and a water replenishing system are provided inside the tower body (1). The dust treatment layer (11) is at the bottom layer of the tower body (1). The bottom of the dust treatment layer (11) is communicated with the bottom of the sewage treatment tank (4). The tail gas input pipe (2) passes through the tower body (1) and is arranged above the dust treatment layer (11), and the nozzle of the tail gas input pipe (2) points to the dust treatment layer (11). One layer or multiple layers above the tail gas input pipe (2) are the treatment layer (12), and multiple treatment layers (12) are arranged in parallel. The discharge main pipe (3) passes through the treatment layer (12) and is fixed at the center of the tower body (1). The bottom end of the discharge main pipe (3) is immersed in the liquid of the dust treatment layer (11), and the top of the discharge main pipe (3) is connected to the atmosphere. An air outlet hole (13) is opened on the wall of the tower body (1) between the dust treatment layer (11) and the treatment layer (12). An air inlet hole (14) is provided on the wall of the tower body (1) on the side of the treatment layer (12), and the liquid in the treatment layer (12) submerges the air inlet hole (14). An overflow exhaust port (31) is provided on the pipe wall of the discharge main pipe (3) above the treatment layer (12). The air inlet hole (14) and the air outlet hole (13) are connected through an exhaust gas transmission pipeline (15). The connection section (151) of the exhaust gas transmission pipeline (15) with the air inlet hole is arranged obliquely upward, and the height of the high end of the connection section (151) of the air inlet hole is higher than the height of the bottom of the overflow exhaust port (31) to prevent the liquid in the treatment layer (12) from flowing back into the exhaust gas transmission pipeline (15). The water replenishing system includes a water replenishing main pipe (51), a water replenishing branch pipe (52) and a water replenishing pump (5). One end of the water replenishing main pipe (51) is connected to the water replenishing pump (5), and the other end enters the inside of the discharge main pipe (3) from the bottom of the discharge main pipe (3). The water replenishing pump (5) is a submersible pump and is arranged at the bottom of the dust treatment layer (11). One end of the water replenishing branch pipe (52) is connected to the water replenishing main pipe (51), and the other end passes through the discharge main pipe (3) to the treatment layer (12). The water replenishing branch pipe (52) is arranged below the overflow exhaust port (31), and a water discharge port (521) is opened on the side pipe wall of the water replenishing branch pipe (52).

2. The industrial waste gas and haze treatment device according to claim 1, characterized in that, A bubble rupture plate (121) is provided above the treatment layer (12). The bubble rupture plate (121) is fixed above the air inlet hole (14), and the liquid in the treatment layer (12) submerges the bubble rupture plate (121).

3. An industrial tail gas and haze treatment device according to claim 1, characterized in that, The tail gas enters the exhaust gas transmission pipeline (15) from the air outlet hole (13), then enters each treatment layer (12) from the air inlet hole (14), is cleaned and decontaminated by the liquid in the treatment layer (12) and then reaches the overflow exhaust port (31), and is then discharged to the atmosphere through the discharge main pipe (3).

4. An industrial tail gas and haze treatment device according to claim 1, characterized in that, The air outlet hole (13) and the air inlet hole (14) surround the tower wall and are arranged correspondingly, and the corresponding air outlet hole (13) and air inlet hole (14) are connected through an exhaust gas transmission pipeline (15).

5. An industrial tail gas and haze treatment device according to claim 1, characterized in that, The terminal of the inlet pipeline (53) of the water replenishing pump (5) is located in the upper middle part of the liquid in the dust treatment layer (11).

6. The industrial waste gas and haze treatment device according to claim 1, characterized in that, A plurality of the water replenishing branch pipes (52) are arranged around the water replenishing main pipe (51), and the outlet ports (521) of each water replenishing branch pipe (52) are arranged at the same positions, so as to ensure that the discharged water can form a circumferential flow within the circular treatment layer (12).

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