Tail gas absorption tower

Abstract

The invention relates to the technical field of tail gas absorption towers, in particular to a tail gas absorption tower which comprises a tail gas absorption tower body, a spraying layer and a liquid storage area are arranged in the tail gas absorption tower body, a plurality of reaction plates are arranged below the spraying layer, a plurality of reaction pieces are arranged on the reaction plates, a plurality of demisting plates are arranged above the spraying layer, and a plurality of demisting pieces are arranged on the demisting plates. Each demisting piece comprises a support, a second avoiding space is formed between each support and the corresponding demisting plate, a demisting cover is arranged at the top of each support, the center of each demisting plate is sunken downwards, a flow guide hole is formed in the center of each demisting plate, a liquid drainage head is connected to the center of the bottom end of the lowermost demisting plate, and the top end of the liquid drainage head is communicated with the flow guide hole of the upper demisting plate. Therefore, the contact time of the purification liquid and the tail gas can be prolonged, the purification effect is improved, liquid drops in the purified gas are effectively removed, and the purification effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas absorption towers, in particular to a tail gas absorption tower. Background Art

[0002] Tail gas absorption towers are widely used in various fields such as electricity, chemical industry, electrical and electronic engineering, metallurgy, brewing, etc. Chemical, pharmaceutical, metallurgical cold rolling pickling, electroplating and other industries generate a large amount of industrial exhaust gas in the production process. According to the national regulations on conservation and emission reduction, industrial exhaust gas must be harmlessly treated and absorbed. Traditional spray absorption treatment is mostly adopted. A spray pipe is set in the spray absorption tower, and the industrial exhaust gas is sent into the absorption tower through an exhaust fan. The gas is sprayed and absorbed. The formed absorption liquid is discharged after neutralization treatment, and the purified exhaust gas is discharged through the filter device at the top of the absorption tower.

[0003] At present, the existing tail gas absorption tower, such as the Chinese patent with publication number CN210874707U, discloses a tail gas absorption tower, including a tail gas absorption tower, a connecting pipe is provided on the right side of the tail gas absorption tower, the connecting pipe is fixedly connected to the tail gas absorption tower through a bracket, a water adding device is fixedly connected to the lower left side of the outer wall of the tail gas absorption tower, the water adding device includes a water pipe, the water pipe is welded to the tail gas absorption tower, the water pipe is interconnected with the tail gas absorption tower through a water inlet pipe, a baffle is slidably connected inside the water pipe, a sealing gasket is fixedly connected at the connection between the baffle and the water pipe, and a top cover is threadedly connected above the water pipe. By installing the water adding device below the outer wall of the tail gas absorption tower, it is effectively convenient to add water to the water tank inside the tail gas absorption tower, thereby increasing the efficiency of the tail gas absorption tower in purifying the tail gas. However, the contact time between the purification liquid used for purifying the tail gas and the tail gas to be treated is relatively short. As the tail gas continues to rise, incomplete purification is very likely to occur.

[0004] How to increase the contact time between the purification liquid and the tail gas, improve the purification effect, effectively remove the droplets in the gas after purification, and improve the purification effect has become a technical problem that needs to be broken through.

[0005] In summary, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0006] In view of the above-mentioned defects, the object of the present invention is to provide a tail gas absorption tower, which can increase the contact time between the purification liquid and the tail gas, improve the purification effect, effectively remove the droplets in the gas after purification treatment, and improve the purification effect.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a tail gas absorption tower, including a tail gas absorption tower body, wherein a spray layer and a liquid storage area for storing purified liquid are arranged in the tail gas absorption tower body, a plurality of reaction plates are arranged below the spray layer, a plurality of reaction parts are arranged on the reaction plates, and the reaction parts include support columns, a first avoidance space is arranged between the support columns and the reaction plates, the top ends of the support columns are connected to reaction heads, and a plurality of through holes are arranged on the reaction heads.

[0008] A plurality of defogger plates are arranged above the spray layer, and a plurality of defogger components are arranged on the defogger plates, and the defogger components all include brackets, and a second avoidance space is arranged between the brackets and the defogger plates, and a defogger hood is arranged on the top of the brackets, and the defogger hood completely wraps and covers the brackets, and the centers of the defogger plates are recessed downwards, and the centers of the defogger plates are provided with guide holes, and the center of the bottom end of the lowest defogger plate is connected to a drainage head, and the top end of the drainage head is connected to the guide holes of the defogger plate above.

[0009] When the impact force provided by the exhaust gas with liquid droplets is unable to blow up the defogger hood, the defogger hood falls and hits the bracket, and the bracket can accelerate the droplets on the defogger hood to fall, so that the defogger hood can be restored to use.

[0010] According to the tail gas absorption tower of the present invention, a plurality of support rods are evenly distributed along the circumferential direction on the upper part of the support, and the ends of the support rods away from the support all abut against the demister hood.

[0011] According to the tail gas absorption tower of the present invention, a plurality of reinforcing strips are arranged inside the demister hood.

[0012] According to the tail gas absorption tower of the present invention, a guide tube is provided between every two demister plates, the top end of each guide tube is connected to the upper demister plate, and the bottom end of the guide tube faces the guide hole of the lower demister plate.

[0013] According to the tail gas absorption tower of the present invention, a plurality of through holes are provided on the reaction plate, the reaction parts are arranged in the through holes, the support columns are inserted into the through holes, the two sides of the support columns are symmetrically connected with connecting columns, and the ends of the connecting columns away from the support columns are connected to the reaction plate.

[0014] According to the tail gas absorption tower of the present invention, a plurality of mounting holes are provided on the demister plate, the demister components are arranged in the mounting holes, the bottom ends of the brackets are inserted into the mounting holes, the lower parts of the brackets are symmetrically connected to connecting rods, and the ends of the connecting rods away from the brackets are connected to the demister plate.

[0015] According to the tail gas absorption tower of the present invention, the reaction head is a cone structure.

[0016] According to the tail gas absorption tower of the present invention, the reaction plate and the demisting plate are both connected to the inner wall of the tail gas absorption tower body.

[0017] According to the tail gas absorption tower of the present invention, the spray layer is composed of a plurality of spray pipes, and a plurality of spray pipes are each provided with a plurality of spray heads.

[0018] According to the tail gas absorption tower of the present invention, an air inlet pipe with one end extending into the interior of the purified liquid is provided on one side of the tail gas absorption tower body.

[0019] The purpose of the present invention is to provide a tail gas absorption tower, including a reaction plate, the reaction plate provides a reaction place for the tail gas after preliminary treatment and the purification liquid, so that the tail gas after preliminary treatment is fully purified, the contact time between the purification liquid and the tail gas is increased, and the purification effect is improved; the demister plate can effectively remove the droplets in the gas after purification treatment, and recover the purification liquid to improve the purification effect; when the impact force provided by the tail gas with droplets cannot blow up the demister hood, the demister hood falls and hits the support rod, and the support rod can accelerate the droplets on the demister hood to fall, so that the demister hood can be restored to use; the demister hood and the rotating plate on the demister plate can prevent the incompletely purified tail gas from passing through the lowest demister plate, thereby improving the purification effect. In summary, the beneficial effects of the present invention are: it can increase the contact time between the purification liquid and the tail gas, improve the purification effect, effectively remove the droplets in the gas after purification treatment, and improve the purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present invention;

[0021] Figure 2 It is a longitudinal cross-sectional view of the interior of the tail gas absorption tower body;

[0022] Figure 3 It is the structural diagram of the reaction plate;

[0023] Figure 4 It is the structural diagram of the reaction part;

[0024] Figure 5 This is the structural diagram of the demister plate;

[0025] Figure 6 for Figure 2 Enlarged view of part A;

[0026] Figure 7 This is the structural diagram of the defogger;

[0027] Figure 8 This is the structural diagram of the bracket;

[0028] In the figure: 1- tail gas absorption tower body, 11- air inlet pipe, 12- spray layer, 13- connecting pipe, 14- purified liquid pump, 15- liquid storage area, 2- reaction plate, 21- reaction piece, 211- reaction head, 212- support column, 213- connecting column, 214- through hole, 3- demister plate, 31- demister piece, 311- bracket, 312- support rod, 313- connecting rod, 32- demister hood, 321- reinforcing strip, 33- guide hole, 4- guide tube, 5- drainage head, 51- rotating plate. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] See also Figure 1 and Figure 2The present invention provides a tail gas absorption tower, including a tail gas absorption tower body 1, a liquid storage area 15 is provided at the bottom of the tail gas absorption tower body 1, the liquid storage area 15 can store purified liquid (according to the type of tail gas, the appropriate purified liquid can be selected), the liquid storage area 15 is connected to the connecting pipe 13 outside the tail gas absorption tower body 1, the connecting pipe 13 is bent upward and penetrated into the tail gas absorption tower body 1 to connect to the spray layer 12, the spray layer 12 is composed of a plurality of spray pipes, and a plurality of spray pipes are provided with a plurality of nozzles, and a purified liquid pump 14 is provided on the connecting pipe 13 outside the tail gas absorption tower body 1, and the purified liquid pump 14 pumps the purified liquid in the liquid storage area 15 The purified liquid is introduced into the spray layer 12 through the connecting pipe 13, and the purified liquid is then sprayed out through the nozzle (other conventional structures on the tail gas absorption tower body 1, such as the liquid supply port for supplying the purified liquid into the tail gas absorption tower body 1, the liquid discharge port for discharging the purified liquid in the tail gas absorption tower body 1, etc., are mature existing technologies in this field, and their specific structures and functions are not repeated here). One side of the tail gas absorption tower body 1 is provided with an air inlet pipe 11 with one end extending into the interior of the purified liquid. The tail gas to be treated (generally needs to be cooled and pressurized) enters the tail gas absorption tower body 1 from the air inlet pipe 11 to react with the purified liquid for purification treatment.

[0033] See also Figure 2 , Figure 3 and Figure 4 A plurality of reaction plates 2 are arranged between the air inlet pipe 11 and the spray layer 12 inside the tail gas absorption tower body 1. The reaction plates 2 are connected to the inner wall of the tail gas absorption tower body 1. The reaction plates 2 can slow down the flow rate of the tail gas after the purification liquid is introduced for preliminary treatment, and gather the tail gas after preliminary treatment. A plurality of through holes are arranged on the reaction plate 2, each of which is provided with a reaction piece 21. The reaction piece 21 includes a support column 212, and the support column 212 is inserted into the through hole. The two sides of the support column 212 are symmetrically connected with connecting columns 213. The ends of the connecting columns 213 away from the support column 212 are connected to the reaction plate 2, and a space that allows the support column 212 to pass through the through hole of the reaction plate 2 is formed. The first avoidance space through which the exhaust gas after preliminary treatment passes (the purified liquid sprayed from the spray layer 12 simultaneously passes through the avoidance space and falls downward into the liquid storage area 15), the top ends of the support columns 212 are connected to the reaction heads 211, the reaction heads 211 are of a vertebral structure, and a plurality of through holes 214 are provided on the reaction heads 211, the through holes 214 can provide a reaction place for the exhaust gas after preliminary treatment and the purified liquid, so that the exhaust gas after preliminary treatment can be secondary purified, the contact time between the purified liquid and the exhaust gas after preliminary treatment can be increased, and the purification effect can be improved, the top end of the reaction head 211 can produce an impact effect on the purified liquid falling from above, so that the purified liquid splashes around, and the contact area between the purified liquid and the exhaust gas can be increased.

[0034] See also Figure 2 , Figure 5 , Figure 6 , Figure 7 and Figure 8 A plurality of demister plates 3 are provided above the spray layer 12, and the demister plates 3 are all connected to the inner wall of the tail gas absorption tower body 1. A plurality of mounting holes are provided on the demister plates 3, and a demister component 31 is provided in each mounting hole. The demister component 31 includes a bracket 311, and the bottom end of the bracket 311 is inserted into the mounting hole. The lower part of the bracket 311 is symmetrically connected to the connecting rod 313, and the end of the connecting rod 313 away from the bracket 311 is connected to the demister plate 3, and a second avoidance space that allows the purified tail gas to pass through is formed between the bracket 311 and the mounting hole of the demister plate 3, and a plurality of support rods 312 are evenly distributed along the circumferential direction on the upper part of the bracket 311, and a demister cover 32 is provided on the top of the bracket 311 (the end of the support rod 312 away from the bracket 311 is abutted against the demister cover). The demister 32 is a flexible hood that is resistant to acid and alkali and has a waterproof function. When the tail gas with liquid droplets flows upward from the mounting hole, the tail gas with liquid droplets exerts an impact force on the demister 32, which blows up the demister 32 and then disperses from the four sides of the demister 32 (the gravity of the demister 32 itself is relatively light, and it does not require much impact force to blow up the demister 32), so that most of the liquid droplets are retained on the demister hood 32. As the number of liquid droplets attached to the demister hood 32 increases, the gravity on the demister hood 32 also increases. If the impact force provided by the tail gas with liquid droplets cannot blow up the demister hood 32, the demister hood 32 will naturally fall down. The demister hood 32 hits the support rod 312, accelerating the droplets on the demister hood 32 to fall, so that the demister hood 32 can be restored to use; the center of the demister plate 3 is slightly concave downward, and the center of the demister plate 3 is provided with a guide hole 33, and the droplets retained on the demister plate 3 will flow to the center of the demister plate 3 and flow downward from the guide hole 33, and a guide tube 4 is provided between every two demister plates 3, and the top of each guide tube 4 is connected to the upper demister plate 3 (the guide tube 4 is connected to the guide hole 33 of the upper demister plate 3), and the bottom end of each guide tube 4 is directly opposite to the guide hole 33 of the lower demister plate 3 (the bottom end of the guide tube 4 is not connected to the lower demister plate 3), and the center of the bottom end of the lowest demister plate 3 is connected to the drainage head 5 (the lowest demister The mist plate 3 does not need to transfer the collected droplets to the guide hole 33 of the next defogger plate 3 through the guide tube 4. The top of the drainage head 5 is connected to the guide hole 33 of the upper defogger plate 3, and the bottom of the drainage head 5 is closed. A plurality of rotating plates 51 are hinged on the circumference of the drainage head 5. The rotating plates 51 are relatively light. When the drainage head 5 stores too many droplets, the liquid flow causes the rotating plates 51 to slightly flip outward and flow out from the gap between the rotating plates 51 and the drainage head 5. In the initial stage of purification, there is not much exhaust gas to be treated inside the exhaust gas absorption tower body 1, and the flow rate of the exhaust gas to be treated inside the exhaust gas absorption tower body 1 is relatively low. The defogger hood 32 and the rotating plate 51 can prevent the exhaust gas that has not been completely purified from passing through the lowest defogger plate 3, thereby improving the purification effect.

[0035] Preferably, if the gas flow rate inside the tail gas absorption tower body 1 is fast, a plurality of reinforcing strips 321 can be provided inside the demister hood 32. The reinforcing strips 321 can enhance the impact force between the tail gas with droplets and the demister hood 32, thereby enhancing the demister effect.

[0036] The tail gas to be treated is introduced into the tail gas absorption tower body 1 from the air inlet pipe 11, and the purification liquid pump 14 is turned on. The purification liquid in the liquid storage area 15 is introduced into the spray layer 12 through the connecting pipe 13 and then sprayed out from the nozzle, and purification can begin (the purification liquid needs to be replaced regularly to ensure the purification effect). During the purification process, the reaction plate 2 provides a reaction place for the tail gas and the purification liquid after preliminary treatment, so that the tail gas after preliminary treatment is fully purified. At the same time, the demister plate 3 removes the droplets entrained in the tail gas after purification, and recovers the purification liquid. The defogged gas is discharged from the top of the tail gas absorption tower body 1 along the pipeline.

[0037] The present invention provides a tail gas absorption tower, including a reaction plate, which provides a reaction site for the tail gas after preliminary treatment and the purification liquid, so that the tail gas after preliminary treatment is fully purified, the contact time between the purification liquid and the tail gas is increased, and the purification effect is improved; the demister plate can effectively remove the droplets in the gas after purification treatment, and recycle the purification liquid to improve the purification effect; when the impact force provided by the tail gas with droplets cannot blow up the demister hood, the demister hood falls and hits the support rod, and the support rod can accelerate the droplets on the demister hood to fall, so that the demister hood can be restored to use; the demister hood and the rotating plate on the demister plate can prevent the incompletely purified tail gas from passing through the lowest demister plate, thereby improving the purification effect. In summary, the beneficial effects of the present invention are: it can increase the contact time between the purification liquid and the tail gas, improve the purification effect, effectively remove the droplets in the gas after purification treatment, and improve the purification effect.

[0038] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A tail gas absorption tower, characterized in that: The tail gas absorption tower body is provided with a spray layer and a liquid storage area for storing a purified liquid, a plurality of reaction plates are provided below the spray layer, a plurality of reaction parts are provided on the reaction plates, the reaction parts include support columns, a first avoidance space is provided between the support columns and the reaction plates, the tops of the support columns are connected to reaction heads, and the reaction heads are provided with a plurality of through holes; A plurality of demister plates are arranged above the spray layer, and a plurality of demister components are arranged on the demister plates, and the demister components all include brackets, and a second avoidance space is arranged between the brackets and the demister plates, and a demister cover is arranged on the top of the brackets, and the demister cover completely covers the brackets, and the centers of the demister plates are all concave downwards, and the centers of the demister plates are all provided with guide holes, and the center of the bottom end of the lowest demister plate is connected to a drainage head, and the top end of the drainage head is connected to the guide hole of the demister plate above; When the impact force provided by the exhaust gas with liquid droplets is unable to blow up the defogger hood, the defogger hood falls and hits the bracket, and the bracket can accelerate the droplets on the defogger hood to fall, so that the defogger hood can be restored to use.

2. The tail gas absorption tower according to claim 1, characterized in that: A plurality of support rods are evenly distributed along the circumferential direction on the upper part of the support, and ends of the support rods away from the support all abut against the demisting cover.

3. The tail gas absorption tower according to claim 2, characterized in that: A plurality of reinforcing strips are arranged inside the demisting cover.

4. The tail gas absorption tower according to claim 1, characterized in that: A guide tube is arranged between every two of the demister plates, the top end of each guide tube is connected to the upper demister plate, and the bottom end of the guide tube is directly facing the guide hole of the lower demister plate.

5. The tail gas absorption tower according to claim 1, characterized in that: The reaction plate is provided with a plurality of through holes, the reaction elements are arranged in the through holes, the support columns are inserted into the through holes, both sides of the support columns are symmetrically connected with connecting columns, and the ends of the connecting columns away from the support columns are connected to the reaction plate.

6. The tail gas absorption tower according to claim 1, characterized in that: The demister plate is provided with a plurality of mounting holes, the demister components are arranged in the mounting holes, the bottom ends of the brackets are inserted into the mounting holes, the lower parts of the brackets are symmetrically connected to connecting rods, and the ends of the connecting rods away from the brackets are connected to the demister plate.

7. The tail gas absorption tower according to claim 1, characterized in that: The reaction head is a cone structure.

8. The tail gas absorption tower according to claim 1, characterized in that: The bottom end of the liquid discharge head is closed, and a plurality of rotating plates are hingedly connected to the circumference of the liquid discharge head. When the liquid discharge head stores too many droplets, the liquid flow turns the rotating plate outward and flows out from the gap between the rotating plate and the liquid discharge head.

9. The tail gas absorption tower according to claim 1, characterized in that: The spray layer is composed of a plurality of spray pipes, and a plurality of spray heads are arranged on each of the plurality of spray pipes.

10. The tail gas absorption tower according to claim 1, characterized in that: An air inlet pipe with one end extending into the interior of the purified liquid is arranged on one side of the tail gas absorption tower body.

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