Layered treatment desulfurization and denitrification absorption tower

Abstract

The utility model discloses a layered treatment desulfurization and denitrification absorption tower, which belongs to the technical field of desulfurization and denitrification absorption towers and comprises a tower body, a lower oxidation chamber, an upper oxidation chamber, a desulfurization chamber and a denitrification chamber. A stirring mechanism is arranged on the tower body, and two electric control valves are fixedly mounted on the outer side of the tower body. According to the utility model, the lower oxidizing chamber and the upper oxidizing chamber are arranged in the inner cavity of the tower body, and waste gas is intermittently guided into the lower oxidizing chamber and the upper oxidizing chamber by utilizing the three-way gas inlet pipe and the two electric control valves, so that the waste gas stays in the lower oxidizing chamber and the upper oxidizing chamber for sufficient time; therefore, the waste gas and an oxidizing agent with ozone sprayed by the oxidation spraying pipe are fully reacted, the subsequent waste gas treatment quality is ensured, and the practicability of the desulfurization and denitrification absorption tower for layered treatment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization and denitration absorption towers, and more specifically to a layered treatment desulfurization and denitration absorption tower. Background Art

[0002] Flue gas desulfurization and denitrification technology is a boiler flue gas purification technology used in the chemical industry that produces a lot of nitrogen oxides and sulfur oxides. Nitrogen oxides and sulfur oxides are one of the main sources of air pollution, so the application of this technology has many benefits for environmental air purification.

[0003] After searching, the utility model patent with announcement number CN207871881U discloses a desulfurization and denitrification absorption tower, including a tower body, a partition plate is provided in the tower body, the partition plate divides the tower body into a desulfurization zone and a denitrification zone located above the desulfurization zone, the lower end of the desulfurization zone is connected to an air inlet pipe, a connecting pipe is connected between the desulfurization zone and the denitrification zone, a demister and an exhaust pipe are provided at the upper end of the denitrification zone, the exhaust pipe is located above the demister, a desulfurization liquid is provided in the desulfurization zone, an oxidation spray pipe for spraying an oxidant and a desulfurization spray pipe for spraying a desulfurization liquid are provided at the upper end of the desulfurization zone, the desulfurization spray pipe is located above the oxidation spray pipe and below the connecting pipe, a denitrification spray pipe for spraying a denitrification liquid is provided at the upper end of the denitrification zone, and the denitrification spray pipe is located above the connecting pipe; the absorption tower can simultaneously desulfurize and denitrify the exhaust gas, and there is no need to perform desulfurization and denitrification treatment on the exhaust gas separately, thereby improving the exhaust gas treatment efficiency and reducing the area occupied by the entire device for treating the exhaust gas. However, the above patents still have the following shortcomings: the waste gas that is generally treated will be continuously introduced into the absorption tower, the oxidation spray and the desulfurization spray are located in the same space, and the time the waste gas stays in the desulfurization zone is not easy to control, which may easily lead to NO and NO2 in the waste gas not being oxidized to NO3, and SO2 not being oxidized to SO3, affecting the subsequent treatment of the waste gas, and the gas entering the desulfurization zone or denitrification zone cannot be well dispersed, affecting the quality of desulfurization and denitrification. For this reason, we propose a layered treatment desulfurization and denitrification absorption tower. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a layered desulfurization and denitrification absorption tower.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A layered desulfurization and denitrification absorption tower, comprising a tower body, a lower oxidation chamber is provided inside the tower body, an upper oxidation chamber is provided inside the tower body, a desulfurization chamber is provided inside the tower body, a denitrification chamber is provided inside the tower body, a stirring mechanism is provided on the tower body, two electrically controlled valves are fixedly installed on the outside of the tower body, the ends of the two electrically controlled valves extend to the inner cavities of the lower oxidation chamber and the upper oxidation chamber respectively, the other ends of the two electrically controlled valves are fixedly connected to a three-way air inlet pipe, and a first air pump is fixedly installed on the outside of the tower body. The input end of the first air pump extends to the inner cavity of the lower oxidation chamber, and the output end of the first air pump is fixedly connected to the first air duct, and the end of the first air duct is fixedly sleeved to the lower part of the inner cavity of the desulfurization chamber. The outside of the tower body is fixedly installed with a second air pump, and the input end of the second air pump extends to the inner cavity of the upper oxidation chamber, and the output end of the second air pump is fixedly connected to the second air duct, and the end of the second air duct is fixedly sleeved to the lower part of the inner cavity of the desulfurization chamber. The inner cavities of the lower oxidation chamber and the upper oxidation chamber are both provided with oxidation spray pipes.

[0007] As a preferred solution of the present invention, the stirring mechanism includes a servo motor fixedly mounted on the top surface of the tower body, the output shaft of the servo motor is fixedly connected to a rotating shaft, the bottom end of the rotating shaft respectively passes through the denitrification chamber, the desulfurization chamber and the upper oxidation chamber and extends to the inner cavity of the lower oxidation chamber, a plurality of first stirring blades are fixedly connected to the side of the rotating shaft and located in the inner cavity of the lower oxidation chamber, a plurality of second stirring blades are fixedly connected to the side of the rotating shaft and located in the inner cavity of the upper oxidation chamber, a plurality of third stirring blades are fixedly connected to the side of the rotating shaft and located in the inner cavity of the desulfurization chamber, and a plurality of fourth stirring blades are fixedly connected to the side of the rotating shaft and located in the inner cavity of the denitrification chamber.

[0008] As a preferred solution of the present invention, a third air pump is fixedly installed on the side of the tower body, the input end of the third air pump extends to the inner cavity of the desulfurization chamber, the output end of the third air pump is fixedly connected to a third air duct, and the end of the third air duct extends to the inner cavity of the denitrification chamber.

[0009] As a preferred solution of the present invention, the inner cavity of the desulfurization chamber is provided with a desulfurization liquid spray pipe, and the inner cavity of the denitrification chamber is provided with a denitrification liquid spray pipe.

[0010] As a preferred solution of the present invention, two drain valves are fixedly installed on the side of the tower body, and the ends of the two drain valves extend to the bottom of the inner cavity of the desulfurization chamber and the denitrification chamber respectively.

[0011] As a preferred solution of the present invention, an exhaust pipe is provided on the side of the top of the tower body, and a control panel is provided on the side of the tower body.

[0012] Compared with the prior art, the advantages of the present invention are:

[0013] (1) In the utility model, a lower oxidation chamber and an upper oxidation chamber are arranged in the inner cavity of the tower body, and the exhaust gas is intermittently introduced into the lower oxidation chamber and the upper oxidation chamber by using a three-way air inlet pipe and two electric control valves, so that the exhaust gas stays in the lower oxidation chamber and the upper oxidation chamber for a sufficient period of time, so that the exhaust gas and the ozone-containing oxidant sprayed from the oxidation spray pipe can fully react, thereby ensuring the quality of subsequent exhaust gas treatment and having good practicality.

[0014] (2) In the present invention, the rotating shaft is driven to rotate by a servo motor, and the rotating shaft is used to drive the fourth stirring blade, the third stirring blade, the second stirring blade and the first stirring blade to rotate in the inner cavity of the denitrification chamber, the desulfurization chamber, the upper oxidation chamber and the lower oxidation chamber respectively, so that the exhaust gas in the denitrification chamber, the desulfurization chamber, the upper oxidation chamber and the lower oxidation chamber can be stirred and dispersed by the fourth stirring blade, the third stirring blade, the second stirring blade and the first stirring blade respectively, thereby ensuring the quality and speed of denitrification, desulfurization and oxidation, and improving the working quality of the layered treatment desulfurization and denitrification absorption tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the front side of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall structure of the back of the utility model;

[0017] Figure 3 It is a cross-sectional schematic diagram of the utility model;

[0018] Figure 4 It is a cross-sectional schematic diagram of the tower body of the present utility model.

[0019] Description of the numbers in the figure:

[0020] 1. Tower body; 2. Lower oxidation chamber; 3. Upper oxidation chamber; 4. Desulfurization chamber; 5. Denitrification chamber; 6. Agitation mechanism; 7. Oxidation spray pipe; 8. Three-way air inlet pipe; 9. Electric control valve; 10. First air pump; 11. First air duct; 12. Second air pump; 13. Second air duct; 14. Desulfurization liquid spray pipe; 15. Denitrification liquid spray pipe; 16. Third air pump; 17. Third air duct; 18. Servo motor; 19. Rotating shaft; 20. Fourth stirring blade; 21. Third stirring blade; 22. Second stirring blade; 23. First stirring blade; 24. Drain valve; 25. Control panel; 26. Exhaust pipe. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean 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, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0024] Example:

[0025] See also Figure 1-4 A layered desulfurization and denitrification absorption tower includes a tower body 1, a lower oxidation chamber 2 is provided inside the tower body 1, an upper oxidation chamber 3 is provided inside the tower body 1, a desulfurization chamber 4 is provided inside the tower body 1, a denitrification chamber 5 is provided inside the tower body 1, a stirring mechanism 6 is provided on the tower body 1, two electric control valves 9 are fixedly installed on the outside of the tower body 1, the ends of the two electric control valves 9 extend to the inner cavity of the lower oxidation chamber 2 and the upper oxidation chamber 3 respectively, the other ends of the two electric control valves 9 are fixedly connected to a three-way air inlet pipe 8, a first air pump 10 is fixedly installed on the outside of the tower body 1, and the first air pump The input end of the pump 10 extends to the inner cavity of the lower oxidation chamber 2, and the output end of the first air pump 10 is fixedly connected to the first air duct 11, and the end of the first air duct 11 is fixedly sleeved to the lower part of the inner cavity of the desulfurization chamber 4. A second air pump 12 is fixedly installed on the outside of the tower body 1, and the input end of the second air pump 12 extends to the inner cavity of the upper oxidation chamber 3. The output end of the second air pump 12 is fixedly connected to the second air duct 13, and the end of the second air duct 13 is fixedly sleeved to the lower part of the inner cavity of the desulfurization chamber 4. The inner cavities of the lower oxidation chamber 2 and the upper oxidation chamber 3 are both provided with oxidation spray pipes 7.

[0026] For details, please refer to Figures 1 to 4 The stirring mechanism 6 includes a servo motor 18 fixedly mounted on the top surface of the tower body 1, and the output shaft of the servo motor 18 is fixedly connected to a rotating shaft 19. The bottom end of the rotating shaft 19 passes through the denitrification chamber 5, the desulfurization chamber 4 and the upper oxidation chamber 3 and extends to the inner cavity of the lower oxidation chamber 2. A plurality of first stirring blades 23 are fixedly connected to the side of the rotating shaft 19 and located in the inner cavity of the lower oxidation chamber 2, a plurality of second stirring blades 22 are fixedly connected to the side of the rotating shaft 19 and located in the inner cavity of the upper oxidation chamber 3, a plurality of third stirring blades 21 are fixedly connected to the side of the rotating shaft 19 and located in the inner cavity of the desulfurization chamber 4, and a plurality of fourth stirring blades 20 are fixedly connected to the side of the rotating shaft 19 and located in the inner cavity of the denitrification chamber 5.

[0027] For details, please refer to Figure 1 and Figure 3 A third air pump 16 is fixedly installed on the side of the tower body 1, and the input end of the third air pump 16 extends to the inner cavity of the desulfurization chamber 4. The output end of the third air pump 16 is fixedly connected to a third air duct 17, and the end of the third air duct 17 extends to the inner cavity of the denitrification chamber 5.

[0028] In this embodiment, the gas desulfurized in the inner cavity of the desulfurization chamber 4 is introduced into the denitration chamber 5 through the third vacuum pump 16 for denitration.

[0029] For details, please refer to Figure 3 The inner cavity of the desulfurization chamber 4 is provided with a desulfurization liquid spray pipe 14, and the inner cavity of the denitrification chamber 5 is provided with a denitrification liquid spray pipe 15.

[0030] In this embodiment, the desulfurization liquid spray pipe 14 is used to spray the desulfurization liquid into the inner cavity of the desulfurization chamber 4 , and the denitrification liquid spray pipe 15 is used to spray the denitrification liquid into the inner cavity of the denitrification chamber 5 .

[0031] For details, please refer to Figure 1 and Figure 4 Two drain valves 24 are fixedly installed on the side of the tower body 1, and the ends of the two drain valves 24 extend to the bottom of the inner cavity of the desulfurization chamber 4 and the denitrification chamber 5 respectively.

[0032] In this embodiment, the excess liquid in the desulfurization chamber 4 and the denitrification chamber 5 is discharged through the drain valve 24 .

[0033] For details, please refer to Figure 1 and Figure 2 An exhaust pipe 26 is provided on the side of the top of the tower body 1, and a control panel 25 is provided on the side of the tower body 1.

[0034] In this embodiment, the desulfurized and denitrified gases are discharged through the exhaust pipe 26 , and the absorption tower is controlled by the control panel 25 .

[0035] Working principle: When in use, first, the servo motor 18 drives the rotating shaft 19 to rotate, and the rotating shaft 19 drives the fourth stirring blade 20, the third stirring blade 21, the second stirring blade 22 and the first stirring blade 23 to rotate in the inner cavity of the denitrification chamber 5, the desulfurization chamber 4, the upper oxidation chamber 3 and the lower oxidation chamber 2 respectively, and then controls an electric control valve 9 to open, so that the exhaust gas in the three-way air inlet pipe 8 is introduced into the inner cavity of the lower oxidation chamber 2. After a certain amount of exhaust gas to be treated enters the lower oxidation chamber 2, the electric control valve 9 connected to the lower oxidation chamber 2 is closed, and the electric control valve 9 connected to the upper oxidation chamber 3 is opened, so that the exhaust gas to be treated The treated waste gas enters the upper oxidation chamber 3. At this time, the oxidation spray pipe 7 in the inner cavity of the lower oxidation chamber 2 is used to introduce an oxidant with ozone into the inner cavity of the lower oxidation chamber 2. The oxidant is used to oxidize SO2 in the waste gas into SO3, and NO and NO2 into NO3. After the waste gas in the lower oxidation chamber 2 is fully oxidized, the first air pump 10 is started to introduce the waste gas in the lower oxidation chamber 2 into the desulfurization chamber 4 through the first air guide pipe 11, and then the electric control valve 9 connected to the upper oxidation chamber 3 is closed, and the electric control valve 9 connected to the lower oxidation chamber 2 is opened, so that the waste gas continues to be introduced into the lower oxidation chamber 2. At the same time, the upper oxidation chamber is used to The oxidation spray pipe 7 in the inner cavity of the upper oxidation chamber 3 introduces an oxidant containing ozone into the inner cavity of the upper oxidation chamber 3, and uses the oxidant to oxidize SO2 in the exhaust gas into SO3, and NO and NO2 into NO3. When the exhaust gas in the upper oxidation chamber 3 is fully oxidized, the second air pump 12 is started to introduce the exhaust gas in the upper oxidation chamber 3 into the desulfurization chamber 4 through the second air guide pipe 13. In this way, the SO2, NO and NO2 in the exhaust gas are fully oxidized through the lower oxidation chamber 2 and the upper oxidation chamber 3. In addition, during the oxidation process, the exhaust gas in the lower oxidation chamber 2 and the upper oxidation chamber 3 is stirred by the first stirring blade 23 and the second stirring blade 22. , so that the oxidant and the exhaust gas can fully and quickly contact each other. Finally, when the exhaust gas enters the desulfurization chamber 4, the desulfurization liquid spray pipe 14 is used to spray the exhaust gas with desulfurization liquid. At the same time, the exhaust gas is stirred by the third stirring blade 21, so that the exhaust gas and the desulfurization liquid can fully contact and react. After desulfurization, the third vacuum pump 16 is started to introduce the exhaust gas in the desulfurization chamber 4 from the third air duct 17 to the inner cavity of the denitrification chamber 5. The denitrification liquid spray pipe 15 is used to spray the exhaust gas with denitrification liquid. At the same time, the exhaust gas is stirred by the fourth stirring blade 20, so that the exhaust gas and the denitrification liquid can fully contact and react. The exhaust gas after desulfurization and denitrification is discharged from the exhaust pipe 26.

[0036] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and improved ideas of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A layered desulfurization and denitrification absorption tower, comprising a tower body (1), characterized in that: The tower body (1) is provided with a lower oxidation chamber (2) inside, an upper oxidation chamber (3) inside, a desulfurization chamber (4) inside, a denitrification chamber (5) inside, and a stirring mechanism (6) on the tower body (1). Two electrically controlled valves (9) are fixedly installed on the outside of the tower body (1). The ends of the two electrically controlled valves (9) extend to the inner cavities of the lower oxidation chamber (2) and the upper oxidation chamber (3) respectively. The other ends of the two electrically controlled valves (9) are fixedly connected to a three-way air inlet pipe (8). A first air pump (10) is fixedly installed on the outside of the tower body (1). The first air pump (10) The input end of the tower body (1) extends to the inner cavity of the lower oxidation chamber (2), the output end of the first air pump (10) is fixedly connected to the first air guide pipe (11), the end of the first air guide pipe (11) is fixedly sleeved to the lower part of the inner cavity of the desulfurization chamber (4), a second air pump (12) is fixedly installed on the outer side of the tower body (1), the input end of the second air pump (12) extends to the inner cavity of the upper oxidation chamber (3), the output end of the second air pump (12) is fixedly connected to the second air guide pipe (13), the end of the second air guide pipe (13) is fixedly sleeved to the lower part of the inner cavity of the desulfurization chamber (4), and the inner cavities of the lower oxidation chamber (2) and the upper oxidation chamber (3) are both provided with oxidation spray pipes (7).

2. A layered desulfurization and denitrification absorption tower according to claim 1, characterized in that: The stirring mechanism (6) includes a servo motor (18) fixedly mounted on the top surface of the tower body (1), the output shaft of the servo motor (18) is fixedly connected to a rotating shaft (19), the bottom end of the rotating shaft (19) respectively passes through the denitrification chamber (5), the desulfurization chamber (4) and the upper oxidation chamber (3) and extends to the inner cavity of the lower oxidation chamber (2), a plurality of first stirring blades (23) are fixedly connected to the side of the rotating shaft (19) and located in the inner cavity of the lower oxidation chamber (2), a plurality of second stirring blades (22) are fixedly connected to the side of the rotating shaft (19) and located in the inner cavity of the upper oxidation chamber (3), a plurality of third stirring blades (21) are fixedly connected to the side of the rotating shaft (19) and located in the inner cavity of the desulfurization chamber (4), and a plurality of fourth stirring blades (20) are fixedly connected to the side of the rotating shaft (19) and located in the inner cavity of the denitrification chamber (5).

3. The layered desulfurization and denitrification absorption tower according to claim 1, characterized in that: A third air pump (16) is fixedly installed on the side of the tower body (1), the input end of the third air pump (16) extends to the inner cavity of the desulfurization chamber (4), and the output end of the third air pump (16) is fixedly connected to a third air guide pipe (17), the end of the third air guide pipe (17) extends to the inner cavity of the denitrification chamber (5).

4. The layered desulfurization and denitrification absorption tower according to claim 1, characterized in that: The inner cavity of the desulfurization chamber (4) is provided with a desulfurization liquid spray pipe (14), and the inner cavity of the denitrification chamber (5) is provided with a denitrification liquid spray pipe (15).

5. The layered desulfurization and denitrification absorption tower according to claim 1, characterized in that: Two drain valves (24) are fixedly mounted on the side of the tower body (1), and the ends of the two drain valves (24) extend to the bottom of the inner cavities of the desulfurization chamber (4) and the denitrification chamber (5), respectively.

6. The layered desulfurization and denitrification absorption tower according to claim 1, characterized in that: An exhaust pipe (26) is provided on the side of the top end of the tower body (1), and a control panel (25) is provided on the side of the tower body (1).

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