Desulfurization and denitrification tail gas purification tower

Abstract

The utility model discloses a desulfurization and denitrification tail gas purification tower, which relates to the technical field of tail gas purification towers and comprises a tower body, two sieve tray, a circular tube, a cleaning plate, a spray nozzle and a driving mechanism. The circular pipe is rotationally mounted in the tower body and penetrates through the sieve tray, and the cleaning plate on the periphery of the circular pipe can be in contact with the inner wall of the tower body and scrapes dirt when the circular pipe rotates; the spray nozzle on one side of the circular pipe can spray desulfurization and denitrification liquid more widely in the rotating process of the circular pipe; according to the desulfurization and denitrification tail gas purification tower disclosed by the utility model, the driving mechanism in the desulfurization and denitrification tail gas purification tower drives the circular pipe to rotate by 360 degrees, so that the mixing degree of liquid and gas is enhanced; the purification tower effectively solves the problems of difficult descaling and insufficient gas-liquid mixing in the desulfurization and denitrification process of the existing spray tower, remarkably improves the desulfurization and denitrification efficiency, reduces the equipment maintenance cost, and has higher practical value.

Description

TECHNICAL FIELD

[0001] The utility model relates to tail gas purification tower technical field, especially relates to a desulfurization and denitrification tail gas purification tower. BACKGROUND

[0002] In many fields of industrial production, such as thermal power generation, steel smelting, chemical manufacturing, etc., a large amount of tail gas containing sulfur oxides (SOx) and nitrogen oxides (NOx) will be generated; if these tail gases are directly discharged into the atmosphere without effective treatment, they will cause a series of serious environmental problems such as acid rain, photochemical smog, etc., causing great harm to the ecological system and human health; therefore, it is crucial to treat the tail gas by desulfurization and denitrification.

[0003] As a common tail gas purification equipment, the spray tower is widely used in the desulfurization and denitrification process; it realizes the purification purpose by fully contacting the liquid with the tail gas, so that the liquid absorbs the sulfur oxides and nitrogen oxides in the tail gas; however, in actual application, the spray tower exposes many problems; on the one hand, during the desulfurization and denitrification process, complex chemical reactions occur in the tower, and some by-products produced are easily attached to the tower wall, tower plate and other parts, forming dirt, which not only affects the appearance of the equipment, but also hinders the gas-liquid contact, reduces the desulfurization and denitrification efficiency, and increases the equipment maintenance cost and downtime; on the other hand, the mixing degree of liquid and gas in the traditional spray tower is limited, and part of the tail gas cannot fully contact with the liquid for reaction, resulting in poor purification effect; therefore, a desulfurization and denitrification tail gas purification tower is proposed. SUMMARY

[0004] The main purpose of the utility model is to provide a desulfurization and denitrification tail gas purification tower, which can effectively solve the problems in the background art.

[0005] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0006] A desulfurization and denitrification tail gas purification tower, comprising a tower body and two sieve hole tower plates, the sieve hole tower plates are coaxially installed in the tower body, a circular pipe is rotatably installed in the tower body, the circular pipe is closed through the sieve hole tower plate, a cleaning plate is fixedly connected to the periphery of the circular pipe, and the cleaning plate and the inner wall of the tower body are in contact with each other.

[0007] A plurality of spray nozzles are fixedly connected to one side of the circular pipe, and the plurality of spray nozzles are arranged above the two sieve hole tower plates.

[0008] The top end of the tower body is connected with a driving mechanism for driving the circular pipe to rotate 360°.

[0009] Preferably, the driving mechanism comprises a speed reducer, two belt pulleys and a belt loop, one side of the speed reducer is fixedly installed at the top end of the tower body, and the two belt pulleys are coaxially installed at the top end of the circular pipe and the output end of the rotor of the speed reducer respectively.

[0010] Preferably, the driving mechanism is fixedly installed with a waterproof cover on the periphery, and the lower end of the waterproof cover is fixedly installed at the top end of the tower body.

[0011] Preferably, the top end of the tower body is fixedly communicated with a tee pipe, the upper end opening of the tee pipe is closed and connected with a blind plate, and the top end of the circular pipe passes through the blind plate at the top end of the tee pipe in a closed manner.

[0012] Preferably, the top end of the circular pipe is coaxially connected with a rotary joint, the top end of the rotary joint is communicated with a connecting pipe, and the connecting pipe and the waterproof cover are fixedly connected.

[0013] Preferably, a connecting frame is fixedly connected between the cleaning plate and the circular pipe, and the lower end of the connecting frame is fixedly connected with interlaced stirring blocks on both sides.

[0014] Preferably, two horizontal pipes are vertically communicated on the circular pipe, the two horizontal pipes are arranged above the two sieve hole trays respectively, and a plurality of spray nozzles are vertically connected above the two horizontal pipes.

[0015] Compared with the prior art, the utility model has the advantages of the following beneficial effects:

[0016] 1. Efficient descaling reduces maintenance cost: the circular pipe rotating in the tower body is connected with the cleaning plate, which is in close contact with the inner wall of the tower body; during equipment operation, the driving mechanism drives the circular pipe to rotate 360 degrees, and the cleaning plate rotates accordingly, which can continuously scrape off the dirt on the inner wall of the tower body caused by the desulfurization and denitrification reaction; this design avoids the accumulation of dirt, reduces equipment failures caused by dirt, reduces the maintenance frequency and cost of the equipment, prolongs the service life of the equipment, ensures the stable operation of the equipment, reduces downtime, and improves production efficiency.

[0017] 2. Enhance gas-liquid mixing and improve desulfurization and denitrification efficiency: the spray nozzles on the circular pipe form a dynamic spray area in the tower body when the circular pipe rotates, which expands the coverage of the liquid; the sieve hole tray disperses the tail gas, increasing the contact opportunity of the tail gas and the liquid; the stirring blocks at the lower end of the connecting frame stir the liquid under the driving of the circular pipe, making the liquid more evenly distributed; these structures cooperate with each other to greatly enhance the mixing degree of the liquid and the gas, so that the sulfur oxides and nitrogen oxides in the tail gas can more fully contact and react with the desulfurization and denitrification liquid, significantly improving the desulfurization and denitrification efficiency and ensuring that the tail gas can be stably discharged to meet environmental protection requirements. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the overall structure schematic view of the present utility model;

[0019] Figure 2 is the sectional view of the present utility model;

[0020] Figure 3 is the internal structure schematic view of the tower body in the present utility model.

[0021] In the drawing: 1, tower body; 2, sieve tray; 3, round pipe; 301, rotary joint; 302, connecting pipe; 4, cleaning plate; 5, spray nozzle; 6, driving mechanism; 601, speed reducer motor; 602, belt pulley; 603, belt loop; 604, waterproof cover; 7, tee pipe; 8, connecting frame; 801, stirring block; 9, cross pipe. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, purposes and effects of the present utility model easy to understand, the present utility model is further described below in combination with specific embodiments.

[0023] As shown in Figures 1-3 A desulfurization and denitrification tail gas purification tower, comprising a tower body 1, two sieve trays 2, a round pipe 3, a cleaning plate 4, a spray nozzle 5 and a driving mechanism 6, is improved on the basis of the existing spray tower, aiming to realize efficient descaling and enhance the mixing degree of liquid and gas, and improve the desulfurization and denitrification effect.

[0024] The tail gas enters from the bottom of the tower body 1, flows upwards through the sieve tray 2, and the evenly distributed sieve holes on the sieve tray 2 disperse the tail gas, increasing the contact area with the liquid. In this process, sulfur oxides and nitrogen oxides in the tail gas will react with the sprayed desulfurization and denitrification liquid.

[0025] As shown in Figure 2 The round pipe 3 is rotatably installed in the tower body 1 and passes through the sieve tray 2 in a closed manner. The top end of the round pipe 3 is connected to the driving mechanism 6. The speed reducer motor 601 in the driving mechanism 6 is fixedly installed at the top end of the tower body 1. Two belt pulleys 602 are coaxially installed at the top end of the round pipe 3 and the output end of the rotor of the speed reducer motor 601, respectively. Through the belt loop 603, when the speed reducer motor 601 is started, it drives the belt pulley 602 to rotate, and then makes the round pipe 3 rotate 360° in the tower body 1.

[0026] As shown in Figure 3As shown, the outer periphery of the circular tube 3 is fixedly connected with the cleaning plate 4, which is in contact with the inner wall of the tower body 1, and in the process of rotation of the circular tube 3, the cleaning plate 4 can scrape off the dirt on the inner wall of the tower body 1 caused by the desulfurization and denitrification reaction, preventing the accumulation of dirt from affecting the normal operation of the tower body 1, at the same time, the connecting frame 8 between the cleaning plate 4 and the circular tube 3 is fixedly connected with the interlaced stirring blocks 801 on both sides of the lower end, the lower bottom surface of the stirring block 801 is in contact with the upper surface of the sieve tray 2, when the circular tube 3 drives the cleaning plate 4 to rotate, the stirring block 801 rotates with it, stirring the desulfurization and denitrification liquid on the sieve tray 2, making the liquid distribution more uniform, enhancing the mixing effect of the liquid and the gas, and promoting the desulfurization and denitrification reaction.

[0027] Referring to Figure 2 and Figure 3 As shown, one side of the circular tube 3 is fixedly connected with a plurality of spray nozzles 5, which are respectively connected to the upper part of the two cross pipes 9, and the two cross pipes 9 are respectively arranged above the two sieve trays 2, the circular tube 3 is connected with the connecting pipe 302 through the rotating joint 301, and the connecting pipe 302 is connected with the external desulfurization and denitrification liquid supply device, when the liquid enters the circular tube 3, it is divided through the cross pipe 9 and then sprayed out from the spray nozzles 5, since the circular tube 3 is rotating continuously, the desulfurization and denitrification liquid sprayed out from the spray nozzles 5 can form a wider coverage range in the tower body 1, fully mixing with the rising exhaust gas, further improving the desulfurization and denitrification efficiency.

[0028] Referring to Figure 1 and Figure 2 As shown, in order to protect the driving mechanism 6, a waterproof cover 604 is fixedly installed on the outer periphery, the lower end of the waterproof cover 604 is fixed to the top end of the tower body 1, preventing the water vapor in the tower from damaging the driving mechanism 6, ensuring its stable operation, the three-way pipe 7 is fixedly connected to the top end of the tower body 1, and the top end of the circular tube 3 is closed upwardly through the blind plate at the top end of the three-way pipe 7, this structure not only ensures the stable rotation of the circular tube 3, but also helps to seal and prevent gas leakage.

[0029] In actual operation, the speed of the reduction motor 601 can be adjusted according to the concentration and flow of pollutants in the exhaust gas, thereby controlling the rotation speed of the circular tube 3, when the concentration of pollutants in the exhaust gas is high, the rotation speed of the circular tube 3 is increased, the cleaning frequency of the cleaning plate 4 is increased, and the spray nozzles 5 spray the desulfurization and denitrification liquid more quickly, strengthening the mixing of the liquid and the gas and improving the desulfurization and denitrification effect;

[0030] When the concentration of pollutants is low, the speed is appropriately reduced to save energy, in this way, the desulfurization and denitrification exhaust gas purification tower can effectively realize descaling and increase the mixing degree of liquid and gas, stably and efficiently perform desulfurization and denitrification operation, and meet the actual production needs.

[0031] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A desulfurization and denitrification tail gas purification tower, comprising a tower body (1) and two sieve trays (2), the sieve trays (2) are coaxially installed in the tower body (1), characterized in that: The tower body (1) is rotatably installed with a circular pipe (3), the circular pipe (3) is closed through the sieve plate (2), the outer periphery of the circular pipe (3) is fixedly connected with a cleaning plate (4), and the cleaning plate (4) and the inner wall of the tower body (1) are in contact with each other. A plurality of spray nozzles (5) are fixedly communicated on one side of the circular pipe (3), and the plurality of spray nozzles (5) are arranged above the two sieve plates (2) respectively. The top end of the tower body (1) is connected with a driving mechanism (6) for driving the circular pipe (3) to rotate 360 degrees.

2. The desulfurization and denitrification tail gas purification tower according to claim 1, characterized in that: The driving mechanism (6) comprises a speed reducer motor (601), two belt pulleys (602) and a belt ring (603), one side of the speed reducer motor (601) is fixedly installed at the top end of the tower body (1), and the two belt pulleys (602) are coaxially installed at the top end of the circular pipe (3) and the output end of the rotor of the speed reducer motor (601) respectively.

3. The desulfurization and denitrification tail gas purification tower according to claim 1, characterized in that: The outer periphery of the driving mechanism (6) is fixedly installed with a waterproof cover (604), and the lower end of the waterproof cover (604) is fixedly installed at the top end of the tower body (1).

4. The desulfurization and denitrification tail gas purification tower according to claim 1, characterized in that: The top end of the tower body (1) is fixedly communicated with a three-way pipe (7), the upper end opening of the three-way pipe (7) is closed and connected with a blind plate, and the top end of the circular pipe (3) is closed through the blind plate at the top end of the three-way pipe (7).

5. The desulfurization and denitrification tail gas purification tower according to claim 3, characterized in that: The top end of the circular pipe (3) is coaxially connected with a rotary joint (301), the top end of the rotary joint (301) is communicated with a connecting pipe (302), and the connecting pipe (302) and the waterproof cover (604) are fixedly connected.

6. The desulfurization and denitrification tail gas purification tower according to claim 1, characterized in that: The cleaning plate (4) and the circular pipe (3) are fixedly connected with a connecting frame (8), and the lower ends of the two sides of the connecting frame (8) are fixedly connected with staggered stirring blocks (801) respectively.

7. The desulfurization and denitrification tail gas purification tower according to claim 1, characterized in that: The circular pipe (3) is vertically communicated with two cross pipes (9), and the two cross pipes (9) are arranged above the two sieve plates (2) respectively, and the plurality of spray nozzles (5) are vertically connected above the two cross pipes (9) respectively.

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