Desulfurization buffer tank for desulfurization tower

Abstract

The utility model relates to the field of desulfurization buffer tanks, and discloses a desulfurization buffer tank for a desulfurization tower, which comprises a buffer tank body, an annular plate is fixed on the inner side wall of the buffer tank body, an annular groove is arranged at the bottom of the annular plate, a second annular pipe is arranged in the annular groove, and a plurality of through holes are equidistantly arranged on the surface of the second annular pipe. An air inlet pipe is fixed to the outer side wall of the buffer tank body, one end of the air inlet pipe communicates with the second annular pipe, a spraying mechanism is arranged at the top of the annular plate, a monitoring mechanism used for liquid level monitoring is arranged on the inner side wall of the buffer tank body, a filtering mechanism is arranged in the buffer tank body, and a sight glass opening is fixed to the outer side wall of the buffer tank body. A liquid inlet pipe is fixed to the outer side wall of the buffer tank body, and a liquid outlet is fixed to the bottom of the buffer tank body. According to the utility model, the sulfur-containing flue gas is subjected to buffer cooling and pressure reduction and preliminary desulfurization absorption treatment in advance before being sent to the desulfurization tower, so that the problem that the desulfurization effect of the desulfurization tower is not ideal is solved, repeated desulfurization is avoided, energy is saved, and pollution to the environment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization buffer tanks, in particular to a desulfurization buffer tank for a desulfurization tower. Background Technique

[0002] A desulfurization tower is a device used to remove sulfur dioxide generated in industrial processes such as coal-fired power plants. It is a key component of wet desulfurization technology. By bringing the flue gas into contact and reaction with the sprayed desulfurizing agent, sulfur dioxide is absorbed and converted into gypsum particles. The desulfurization buffer tank is an important device in the flue gas desulfurization system in industrial fields such as coal-fired power plants. It is usually located at the inlet of the desulfurization tower. The main function of the desulfurization buffer tank is to buffer and stabilize the flue gas entering the desulfurization equipment during the flue gas desulfurization process, so as to improve the desulfurization efficiency and the stable operation of the equipment.

[0003] During the use of traditional desulfurization towers, the sulfur-containing flue gas is directly sent to the desulfurization tower. Due to the relatively fast flow rate of the high-temperature and high-pressure flue gas, the desulfurization effect is not ideal, and it is difficult to meet the industrial waste gas emission standards. The flue gas needs to be desulfurized repeatedly, which not only consumes more time, reduces work efficiency, but also wastes equipment and energy. Moreover, during the use of traditional desulfurization buffer tanks, the uneven contact between the desulfurizing agent and the flue gas will lead to incomplete desulfurization reactions, making it impossible to effectively remove sulfur dioxide in some waste gases, thus affecting the desulfurization effect. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose a desulfurization buffer tank for a desulfurization tower.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A desulfurization buffer tank for a desulfurization tower, comprising a buffer tank body. An annular plate is fixed to the inner side wall of the buffer tank body. An annular groove is opened at the bottom of the annular plate. A second annular pipe is arranged in the annular groove. A plurality of through holes are equidistantly opened on the surface of the second annular pipe. An air inlet pipe is fixed to the outer side wall of the buffer tank body, and one end of the air inlet pipe is communicated with the second annular pipe. A spraying mechanism is arranged on the top of the annular plate. A monitoring mechanism for liquid level monitoring is arranged on the inner side wall of the buffer tank body. A filtering mechanism is arranged inside the buffer tank body. A sight glass port is fixed to the outer side wall of the buffer tank body. A liquid inlet pipe is fixed to the outer side wall of the buffer tank body. A liquid discharge port is fixed to the bottom of the buffer tank body. During the use of this device, the sulfur-containing flue gas before being sent to the desulfurization tower is pre-buffered, cooled, depressurized and preliminarily desulfurized and absorbed, solving the problem of unsatisfactory desulfurization effect of the desulfurization tower, avoiding repeated desulfurization, saving energy and reducing environmental pollution.

[0007] As a further solution of the utility model, the spraying mechanism comprises a first annular pipe. The first annular pipe is arranged on the top of the annular plate. A plurality of branch pipes are fixedly arranged at equal intervals at the bottom of the first annular pipe, and a plurality of branch pipes all penetrate through the inner top of the annular plate. One ends of the plurality of branch pipes are all fixedly provided with spray heads. A protective box is fixedly arranged on the inner side wall of the buffer tank body. A water pump is fixedly arranged inside the protective box. A connecting pipe is fixedly arranged at the water inlet of the water pump, and one end of the connecting pipe penetrates through the outer side wall of the protective box. A three-way pipe is fixedly arranged at the water outlet of the water pump, and two of the three ends of the three-way pipe are communicated with the first annular pipe. The water pump is driven to work, and the desulfurizer is pumped into the first annular pipe through the connecting pipe and the three-way pipe, and is evenly sprayed into the annular groove through the plurality of branch pipes and the spray heads for preliminary desulfurization treatment, so that the sulfur-containing flue gas and the desulfurizer are fully contacted, the desulfurization effect is improved, and the desulfurization efficiency is accelerated.

[0008] As a further solution of the utility model, the monitoring mechanism comprises a sleeve. The sleeve is arranged inside the buffer tank body and is located below the annular plate. A connecting rod is fixedly arranged on the inner side wall of the buffer tank body, and the sleeve is fixed to the connecting rod. A round hole is formed in the bottom of the sleeve. A connecting column is fixedly arranged at the bottom of the sleeve. A bottom plate is fixedly arranged at the bottom of the connecting column. A pressure sensor is fixedly arranged on the top of the bottom plate. A floating ball is arranged on the inner side wall of the sleeve. A configuration block is fixedly arranged at the bottom of the floating ball. An alarm is fixedly arranged on the top of the buffer tank body. When the liquid level of the desulfurizer drops, under the action of the floating ball, the configuration block gradually descends along the inner wall of the sleeve. When the configuration block contacts the pressure sensor, the pressure sensor generates a signal and transmits it to the controller. After receiving the signal, the controller turns on the power switch of the alarm, and at this time, the alarm emits a beeping sound for alarm. At this time, the valve at the liquid inlet pipe is opened, and the desulfurizer is injected into the buffer tank body through the liquid inlet pipe, so that the supply amount of the desulfurizer and the reaction conditions can be adjusted in time to ensure the efficient progress of the desulfurization reaction.

[0009] As a further solution of the utility model, the filtering mechanism comprises a filtering layer. The filtering layer is arranged inside the buffer tank body and is located above the annular plate. An air outlet pipe is fixedly arranged on the top of the buffer tank body, and one end of the air outlet pipe is fixed to the filtering layer. A wire mesh demister is fixedly arranged on the inner side wall of the buffer tank body and is located between the filtering layer and the first annular pipe. The flue gas after preliminary desulfurization treatment is filtered through the wire mesh demister and the filtering layer, and the impurities and dust in the flue gas are filtered to avoid polluting the environment.

[0010] The beneficial effects of the utility model are as follows:

[0011] 1. During the use of the device, the sulfur-containing flue gas before being sent to the desulfurization tower is pre-buffered, cooled, depressurized and preliminarily desulfurized and absorbed, which solves the problem of unsatisfactory desulfurization effect of the desulfurization tower, avoids repeated desulfurization, saves energy, and reduces the environmental pollution caused by industrial waste gas.

[0012] 2. The sulfur-containing flue gas is input into the inside of the annular plate through the intake pipe, the second annular pipe and the through hole, the flow rate and range of the incoming flue gas are restricted, and the sulfur-containing flue gas and the desulfurizer are fully contacted in cooperation with the spraying mechanism, so as to improve the desulfurization effect and accelerate the desulfurization efficiency.

[0013] 3. The desulfurizer in the buffer tank body can be monitored through the liquid level monitoring mechanism, and the supply amount and reaction conditions of the desulfurizer can be adjusted in time to ensure the efficient progress of the desulfurization reaction. Brief Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of a desulfurization buffer tank for a desulfurization tower proposed by the present utility model;

[0015] Figure 2 It is a schematic cross-sectional view of the buffer tank body of a desulfurization buffer tank for a desulfurization tower proposed by the present utility model;

[0016] Figure 3 It is a schematic diagram of the three-way pipe, the first annular pipe, the branch pipe and the spray head of a desulfurization buffer tank for a desulfurization tower proposed by the present utility model;

[0017] Figure 4 It is a schematic diagram of the intake pipe, the second annular pipe and the through hole of a desulfurization buffer tank for a desulfurization tower proposed by the present utility model;

[0018] Figure 5 It is a schematic cross-sectional view of the sleeve of a desulfurization buffer tank for a desulfurization tower proposed by the present utility model.

[0019] In the figure: 1. Buffer tank body; 2. Sight glass opening; 3. Intake pipe; 4. Drainage port; 5. Alarm; 6. Outlet pipe; 7. Wire mesh demister; 8. Filter layer; 9. Annular plate; 10. Liquid inlet pipe; 11. Sleeve; 12. Connecting pipe; 13. Protection box; 14. Water pump; 15. Three-way pipe; 16. First annular pipe; 17. Branch pipe; 18. Spray head; 19. Second annular pipe; 20. Through hole; 21. Connecting rod; 22. Bottom plate; 23. Connecting column; 24. Pressure sensor; 25. Floating body; 26. Configuration block. Detailed Embodiment

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0021] Refer to Figures 1 - 5, A desulfurization buffer tank for a desulfurization tower, comprising a buffer tank body 1. An annular plate 9 is fixed to the inner side wall of the buffer tank body 1. An annular groove is formed at the bottom of the annular plate 9. A second annular pipe 19 is arranged in the annular groove. A plurality of through holes 20 are equidistantly formed on the surface of the second annular pipe 19. An air inlet pipe 3 is fixed to the outer side wall of the buffer tank body 1, and one end of the air inlet pipe 3 is communicated with the second annular pipe 19. A spraying mechanism is arranged on the top of the annular plate 9. A monitoring mechanism for liquid level monitoring is arranged on the inner side wall of the buffer tank body 1. A filtering mechanism is arranged inside the buffer tank body 1. A sight glass port 2 is fixed to the outer side wall of the buffer tank body 1. A liquid inlet pipe 10 is fixed to the outer side wall of the buffer tank body 1. A liquid discharge port 4 is fixed to the bottom of the buffer tank body 1. During the use of this device, the sulfur-containing flue gas before being sent to the desulfurization tower is pre-buffered, cooled, depressurized and preliminarily desulfurized and absorbed, solving the problem of unsatisfactory desulfurization effect of the desulfurization tower, avoiding repeated desulfurization, saving energy and reducing environmental pollution.

[0022] Refer to Figure 2 and Figure 3 , In a preferred embodiment, the spraying mechanism includes a first annular pipe 16. The first annular pipe 16 is arranged on the top of the annular plate 9. A plurality of branch pipes 17 are equidistantly fixed to the bottom of the first annular pipe 16, and a plurality of branch pipes 17 all penetrate through the inner top of the annular plate 9. One end of each of the plurality of branch pipes 17 is fixed with a nozzle 18. A protection box 13 is fixed to the inner side wall of the buffer tank body 1. A water pump 14 is fixed inside the protection box 13. A connecting pipe 12 is fixed to the water inlet of the water pump 14, and one end of the connecting pipe 12 penetrates through the outer side wall of the protection box 13. A tee pipe 15 is fixed to the water outlet of the water pump 14, and two of the ends of the tee pipe 15 are both communicated with the first annular pipe 16. Driving the water pump 14 to work, the desulfurizing agent is pumped into the first annular pipe 16 through the connecting pipe 12 and the tee pipe 15, and is evenly sprayed into the annular groove through the plurality of branch pipes 17 and the nozzles 18 for preliminary desulfurization treatment, enabling the sulfur-containing flue gas and the desulfurizing agent to fully contact, improving the desulfurization effect and accelerating the desulfurization efficiency.

[0023] Refer to Figure 1 and Figure 5, in a preferred embodiment, the monitoring mechanism includes a sleeve 11. The sleeve 11 is disposed inside the buffer tank body 1 and is located below the annular plate 9. A connecting rod 21 is fixed to the inner side wall of the buffer tank body 1, and the sleeve 11 is fixed to the connecting rod 21. A circular hole is formed at the bottom of the sleeve 11. A connecting column 23 is fixed to the bottom of the sleeve 11, a bottom plate 22 is fixed to the bottom of the connecting column 23, and a pressure sensor 24 is fixed to the top of the bottom plate 22. A floating ball 25 is disposed on the inner side wall of the sleeve 11, and a configuration block 26 is fixed to the bottom of the floating ball 25. An alarm 5 is fixed to the top of the buffer tank body 1. When the desulfurizer liquid level drops, under the action of the floating ball 25, the configuration block 26 gradually descends along the inner wall of the sleeve 11. When the configuration block 26 contacts the pressure sensor 24, the pressure sensor 24 generates a signal and transmits it to the controller. After receiving the signal, the controller turns on the power switch of the alarm 5. At this time, the alarm 5 emits a beeping sound for alarm. At this time, the valve at the liquid inlet pipe 10 is opened, and the desulfurizer is injected into the buffer tank body 1 through the liquid inlet pipe 10, so as to timely adjust the supply amount and reaction conditions of the desulfurizer to ensure the efficient progress of the desulfurization reaction.

[0024] Refer to Figure 1 and Figure 2 , in a preferred embodiment, the filtering mechanism includes a filtering layer 8. The filtering layer 8 is disposed inside the buffer tank body 1 and is located above the annular plate 9. An air outlet pipe 6 is fixed to the top of the buffer tank body 1, and one end of the air outlet pipe 6 is fixed to the filtering layer 8. A wire mesh demister 7 is fixed to the inner side wall of the buffer tank body 1 and is located at the middle position between the filtering layer 8 and the first annular pipe 16. The flue gas after preliminary desulfurization treatment is filtered by the wire mesh demister and the filtering layer, and the impurities and dust in the flue gas are filtered to avoid environmental pollution.

[0025] Working principle of this embodiment: During the use of this device, the air outlet pipe 6 is pre-connected to the air inlet of the desulfurization tower, and the valve at the air outlet pipe 6 is opened so that the air outlet pipe 6 and the desulfurization tower are in a connected state. The valve at the liquid inlet pipe 10 is opened, and a certain amount of desulfurizing agent is injected into the bottom of the buffer tank body 1 through the liquid inlet pipe 10. The valve at the air inlet pipe 3 is opened, and the sulfur-containing flue gas is input into the second annular pipe 19 through the air inlet pipe 3 and diffused into the inside of the annular plate 9 through a plurality of through holes 20 to limit the flow rate and range of the flue gas. The power switch of the water pump 14 is turned on. When the water pump 14 is working, the desulfurizing agent is pumped into the first annular pipe 16 through the connecting pipe 12 and the tee pipe 15 and evenly sprayed in the annular groove through a plurality of branch pipes 17 and nozzles 18 for preliminary desulfurization treatment, so that the sulfur-containing flue gas and the desulfurizing agent are fully contacted, the desulfurization effect is improved, and the desulfurization efficiency is accelerated. The desulfurized flue gas enters the top inside the buffer tank body 1 through the wire mesh demister 7 and is filtered through the filter layer 8. The filtered flue gas enters the desulfurization tower through the air outlet pipe 6 for deep desulfurization, avoiding directly sending the sulfur-containing flue gas to the desulfurization tower for desulfurization treatment, thereby improving the desulfurization effect of the desulfurization tower on the sulfur-containing flue gas. During the use of the desulfurizing agent, the liquid level height of the desulfurizing agent will gradually decrease. At this time, under the action of the float 25, the configuration block 26 gradually descends along the inner wall of the sleeve 11. When the configuration block 26 contacts the pressure sensor 24, the pressure sensor 24 generates a signal and transmits it to the controller. After receiving the signal, the controller turns on the power switch of the alarm 5. At this time, the alarm 5 emits a beeping sound for alarm. At this time, the valve at the liquid inlet pipe 10 is opened, and the desulfurizing agent is injected into the buffer tank body 1 through the liquid inlet pipe 10, which can timely adjust the supply amount and reaction conditions of the desulfurizing agent to ensure the efficient progress of the desulfurization reaction.

[0026] For the sake of convenience of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "over other devices or structures" will be positioned "below other devices or structures" or "under other devices or structures" afterwards. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations are made for the spatial relative descriptions used here.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A desulfurization buffer tank for a desulfurization tower, comprising a buffer tank body (1), characterized in that: An annular plate (9) is fixed to the inner wall of the buffer tank body (1), an annular groove is provided at the bottom of the annular plate (9), a second annular tube (19) is arranged in the annular groove, a plurality of through holes (20) are provided at equal intervals on the surface of the second annular tube (19), an air inlet pipe (3) is fixed to the outer wall of the buffer tank body (1), and one end of the air inlet pipe (3) is connected to the second annular tube (19), a spray mechanism is provided on the top of the annular plate (9), a monitoring mechanism for liquid level monitoring is provided on the inner wall of the buffer tank body (1), a filtering mechanism is provided inside the buffer tank body (1), a sight glass port (2) is fixed to the outer wall of the buffer tank body (1), a liquid inlet pipe (10) is fixed to the outer wall of the buffer tank body (1), and a liquid discharge port (4) is fixed to the bottom of the buffer tank body (1).

2. The desulfurization buffer tank for a desulfurization tower according to claim 1, characterized in that: The spray mechanism comprises a first annular tube (16), the top of the annular plate (9) is provided with the first annular tube (16), a plurality of branch tubes (17) are fixed at equal distances at the bottom of the first annular tube (16), and the plurality of branch tubes (17) all pass through the top of the annular plate (9), and a spray head (18) is fixed at one end of the plurality of branch tubes (17).

3. The desulfurization buffer tank for a desulfurization tower according to claim 2, characterized in that: A protection box (13) is fixed to the inner wall of the buffer tank body (1), a water pump (14) is fixed inside the protection box (13), a connecting pipe (12) is fixed to the water inlet of the water pump (14), and one end of the connecting pipe (12) passes through the outer wall of the protection box (13), and a three-way pipe (15) is fixed to the water outlet of the water pump (14), and both ends of the three-way pipe (15) are connected to the first annular pipe (16).

4. The desulfurization buffer tank for a desulfurization tower according to claim 1, characterized in that: The monitoring mechanism comprises a sleeve (11), the sleeve (11) is arranged inside the buffer tank body (1), and the sleeve (11) is located below the annular plate (9), a connecting rod (21) is fixed to the inner wall of the buffer tank body (1), and the sleeve (11) and the connecting rod (21) are fixed, a circular hole is opened at the bottom of the sleeve (11), a connecting column (23) is fixed to the bottom of the sleeve (11), a bottom plate (22) is fixed to the bottom of the connecting column (23), a pressure sensor (24) is fixed to the top of the bottom plate (22), a float (25) is arranged on the inner wall of the sleeve (11), a configuration block (26) is fixed to the bottom of the float (25), and an alarm (5) is fixed to the top of the buffer tank body (1).

5. The desulfurization buffer tank for a desulfurization tower according to claim 1, characterized in that: The filtering mechanism comprises a filtering layer (8), wherein the filtering layer (8) is arranged inside the buffer tank body (1), and the filtering layer (8) is located above the annular plate (9); an air outlet pipe (6) is fixed to the top of the buffer tank body (1), and one end of the air outlet pipe (6) is fixed to the filtering layer (8).

6. The desulfurization buffer tank for a desulfurization tower according to claim 1, characterized in that: A wire mesh demister (7) is fixed to the inner wall of the buffer tank body (1), and the wire mesh demister (7) is located between the filter layer (8) and the first annular tube (16).

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