Desulfurizing tower with overflow gas blocking function

Abstract

The utility model discloses a desulfurizing tower capable of overflowing and blocking gas, which belongs to the technical field of flue gas desulfurization and comprises a desulfurizing tower main body, and a desulfurizing device for desulfurizing flue gas, an overflowing device for overflowing and blocking gas and a demisting device for removing mist are mounted on the desulfurizing tower main body. The desulfurization device comprises a stirring assembly and a spraying assembly. Lime slurry can be stirred through the arrangement of the stirring assembly, the uniformity of the lime slurry is ensured, scaling is avoided, the liquid level of the lime slurry can be controlled through the arrangement of the overflow device, and the influence of excessive lime slurry on input of sulfur-containing flue gas is avoided; the spraying pipe is arranged in a 45-degree inclined mode, so that the situation that sprayed lime slurry adheres to the spraying pipe, scaling is caused, and lime slurry spraying is affected is avoided, the overflow pipe is arranged in a 45-degree inclined mode, the situation that the lime slurry scales in the overflow pipe and blocks a pipeline is avoided, and the breather pipe prevents smoke from flowing backwards along with the overflow pipe; one end of the breather pipe is bent downwards to prevent foreign matters from entering and blocking the pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas desulfurization, in particular to an overflow and gas-blocking desulfurization tower. Background Art

[0002] Industrial waste gas is also generated during the industrial production process. Many industrial waste gases contain harmful substances such as sulfur dioxide. If the industrial waste gas is directly discharged into the atmosphere, it will cause serious environmental pollution. Therefore, the industrial waste gas needs to be desulfurized. The desulfurization method commonly used at present is the desulfurization tower.

[0003] For example, Chinese patent application CN113773881A discloses a desulfurization tower, which includes a tower body, a slurry area and a spray area. An air inlet is provided at the bottom of the side wall of the tower body, and an air outlet is provided at the top of the tower body; the slurry area is located at the bottom of the tower body and below the air inlet; the spray area is located at the top of the tower body and between the air inlet and the air outlet, the spray area is connected to the slurry area through a pipeline, and the spray area includes a plurality of spray devices; the spray device includes a main body, a connecting sleeve and a plurality of branch pipes, and the main body is connected to the pipeline; the connecting sleeve is rotatably sleeved on the outer periphery of the free end of the main body, and the plurality of branch pipes are evenly distributed on the connecting sleeve around the axis of the main body; a second nozzle is provided at the free end of the branch pipe, and the liquid flow paths sprayed by the second nozzles in two adjacent spray devices intersect with each other.

[0004] However, when the desulfurization tower is in use, the lime slurry at the bottom of the tower body is prone to precipitation and scaling, resulting in reduced desulfurization effect. The horizontally arranged spray device is prone to cause the lime slurry to adhere to the spray pipe and scale, causing blockage. The overflow pipe mouth is set high and directly connected to the horizontal pipe. The lime slurry liquid level is usually not higher than the overflow pipe mouth, so the flue gas will escape from the overflow pipe and pollute the environment.

[0005] Based on this, the utility model designs a desulfurization tower with overflow and gas blocking to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a desulfurization tower with overflow and gas blocking.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A desulfurization tower with overflow and gas blocking, comprising a desulfurization tower body,

[0009] The desulfurization tower body is equipped with a desulfurization device for desulfurizing flue gas, an overflow device for overflow and gas blocking, and a demisting device for removing mist;

[0010] The desulfurization device includes a stirring component for stirring lime slurry and a spraying component for spraying lime slurry for desulfurization. The stirring component and the spraying component are connected to the desulfurization tower body.

[0011] Furthermore, the desulfurization tower body includes a base, a slurry pool, an absorption layer, a demisting layer and a flue gas inlet. The slurry pool is fixedly installed on the upper end of the base, the lower end of the absorption layer is connected and fixedly connected to the slurry pool, the lower end of the demisting layer is connected and fixedly connected to the absorption layer, the flue gas inlet is located on the lower end side wall of the absorption layer, the flue gas inlet is connected and fixedly connected to the absorption layer, the upper end of the base is connected to the spray assembly, the slurry pool is connected to the stirring assembly and the overflow device, the absorption layer is connected to the spray assembly, the upper end side wall of the slurry pool is provided with a liquid inlet pipe, the lower end side wall of the slurry pool is provided with a liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe of the slurry pool are provided with control valves.

[0012] Furthermore, the stirring assembly includes a motor, a stirring roller and multiple stirring blades. The motor is fixedly mounted on the outer wall of the upper end of the slurry pool. The output end of the motor passes through the slurry pool and is fixedly connected to the stirring roller. The upper and lower ends of the stirring roller are respectively rotatably connected to the top and bottom of the slurry pool. The upper end of the stirring roller is sealed with the slurry pool. The multiple stirring blades are evenly distributed on the outside of the stirring roller, and the stirring blades are fixedly mounted on the outside of the stirring roller.

[0013] Furthermore, there are three spray assemblies, which are equidistantly distributed at the right end of the slurry pool. The spray assembly includes a water pump, a delivery pipe, a spray pipe and multiple nozzles. The water pump is fixedly installed on the upper end of the base. The water pump is located on the right side of the slurry pool. The water inlet of the water pump is connected and fixedly connected to the slurry pool, the water outlet of the water pump is connected and fixedly connected to the lower end of the delivery pipe, the upper end of the delivery pipe is connected and fixedly connected to the spray pipe, the spray pipe passes through the upper side wall of the absorption layer and is fixedly connected to the absorption layer, and multiple nozzles are evenly distributed on the spray pipe located at the lower end of the inner part of the absorption layer, and the nozzles are connected and fixedly connected to the spray pipe.

[0014] Furthermore, the heights of the spray pipes of the three spray assemblies increase successively from front to back, the spray pipes are inclined 45° from one end close to the delivery pipe to the end away from the delivery pipe, the output direction of the nozzle is vertically downward, and the lowest point of the spray pipe is located above the highest point of the flue gas inlet.

[0015] Furthermore, the overflow device includes an overflow pipe and a vent pipe. One end of the overflow pipe is inclined 45° downward and passes through the side wall of the slurry pool and is fixedly connected to the slurry pool. The middle section of the overflow pipe is located outside the slurry pool and is arranged horizontally. The vent pipe is connected and fixedly connected to the upper end of the middle section of the overflow pipe.

[0016] Furthermore, one end of the overflow pipe passes through the slurry pool and is inserted below the lime slurry level in the slurry pool, the middle section of the overflow pipe is flush with the lime slurry level in the slurry pool, and one end of the vent pipe is bent downward.

[0017] Furthermore, the demisting device is a flat-plate demisting device, which is a prior art, and the demisting device is fixedly installed on the inner wall of the demisting layer.

[0018] Compared with the prior art, the utility model has the following beneficial effects: 1. The lime slurry can be stirred by the setting of the stirring component to ensure the uniformity of the lime slurry, avoid scaling, and improve the desulfurization effect. The lime slurry level can be controlled by the setting of the overflow device to avoid excessive lime slurry affecting the input of sulfur-containing flue gas;

[0019] 2. The 45° tilt setting of the spray pipe prevents the sprayed lime slurry from adhering to the spray pipe and thus scaling to affect the lime slurry spraying. The 45° tilt setting of the overflow pipe prevents the lime slurry scaling from clogging the pipe in the overflow pipe. The overflow pipe mouth is set at a lower position, and is connected to a 45° upward pipe, a vertical upward pipe, and then a horizontal pipe. Compared with the traditional method, there is an additional upward pipe. At this time, when the lime slurry level exceeds the height of the horizontal pipe, overflow occurs. Therefore, the lime slurry level of the utility model is usually higher than the overflow pipe mouth position, thereby preventing smoke from escaping from the overflow pipe. However, the lime slurry level is usually higher than the overflow pipe mouth position. Due to the siphon effect, the lime slurry will be sucked out of the overflow pipe, so a vent pipe is set to break the siphon to achieve overflow only when the lime slurry level exceeds the height of the horizontal pipe, thereby controlling the liquid level. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0021] Figure 1 This is a three-dimensional diagram of a desulfurization tower with overflow and gas blocking according to the present invention;

[0022] Figure 2 This is a front view of a desulfurization tower with overflow and gas blocking according to the utility model;

[0023] Figure 3 This is a left side view of a desulfurization tower with overflow and gas blocking according to the present invention;

[0024] Figure 4 To follow Figure 3 AA direction cross-sectional view.

[0025] The numbers in the figure represent:

[0026] 1. Desulfurization tower body; 11. Base; 12. Slurry pool; 13. Absorption layer; 14. Demisting layer; 15. Flue gas inlet; 2. Desulfurization device; 21. Stirring assembly; 211. Motor; 212. Stirring roller; 213. Stirring blade; 22. Spraying assembly; 221. Water pump; 222. Delivery pipe; 223. Spraying pipe; 224. Nozzle; 3. Overflow device; 31. Overflow pipe; 32. Vent pipe; 4. Demisting device. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0028] The terms “left,” “right,” “front,” “back,” “up,” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0029] Example 1: In some embodiments, please refer to the accompanying drawings of the specification. Figures 1-4 A desulfurization tower with overflow and gas blocking comprises a desulfurization tower body 1,

[0030] The desulfurization tower body 1 is equipped with a desulfurization device 2 for desulfurizing flue gas, an overflow device 3 for overflow and gas blocking, and a demisting device 4 for removing mist;

[0031] The desulfurization device 2 includes a stirring component 21 for stirring lime slurry and a spraying component 22 for spraying lime slurry for desulfurization. The stirring component 21 and the spraying component 22 are connected to the desulfurization tower body 1.

[0032] When the overflow-barrier desulfurization tower is in normal use, the sulfur-containing flue gas is transported to the inner side of the desulfurization tower main body 1, and the lime slurry at the bottom of the desulfurization tower main body 1 is sprayed out above the sulfur-containing flue gas through the spray component 22 to separate the sulfur in the sulfur-containing flue gas. The generated mist is removed by the demister 4, and the flue gas that meets the standards is discharged from the top of the desulfurization tower main body 1. At the same time, the stirring component 21 is started to stir the lime slurry in the desulfurization tower main body 1. The setting of the stirring component 21 can stir the lime slurry to ensure the uniformity of the lime slurry and avoid scaling. The setting of the overflow device 3 can control the lime slurry level to avoid excessive lime slurry affecting the input of sulfur-containing flue gas.

[0033] The desulfurization tower body 1 includes a base 11, a slurry pool 12, an absorption layer 13, a demisting layer 14 and a flue gas inlet 15. The slurry pool 12 is fixedly installed on the upper end of the base 11, the lower end of the absorption layer 13 is connected and fixedly connected to the slurry pool 12, the lower end of the demisting layer 14 is connected and fixedly connected to the absorption layer 13, the flue gas inlet 15 is located on the lower end side wall of the absorption layer 13, the flue gas inlet 15 is connected and fixedly connected to the absorption layer 13, the upper end of the base 11 is connected to the spray assembly 22, the slurry pool 12 is connected to the stirring assembly 21 and the overflow device 3, the absorption layer 13 is connected to the spray assembly 22, the upper end side wall of the slurry pool 12 is provided with a liquid inlet pipe, the lower end side wall of the slurry pool 12 is provided with a liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe of the slurry pool 12 are provided with control valves.

[0034] The stirring assembly 21 includes a motor 211, a stirring roller 212 and a plurality of stirring blades 213. The motor 211 is fixedly mounted on the outer wall of the upper end of the slurry pool 12. The output end of the motor 211 passes through the slurry pool 12 and is fixedly connected to the stirring roller 212. The upper and lower ends of the stirring roller 212 are respectively rotatably connected to the top and bottom of the slurry pool 12. The upper end of the stirring roller 212 is sealed with the slurry pool 12. The plurality of stirring blades 213 are evenly distributed on the outside of the stirring roller 212. The stirring blades 213 are fixedly mounted on the outside of the stirring roller 212.

[0035] There are three spray assemblies 22, and the three spray assemblies 22 are equidistantly distributed at the right end of the slurry pool 12. The spray assembly 22 includes a water pump 221, a delivery pipe 222, a spray pipe 223 and multiple nozzles 224. The water pump 221 is fixedly installed on the upper end of the base 11, and the water pump 221 is located on the right side of the slurry pool 12. The water inlet of the water pump 221 is connected and fixedly connected to the slurry pool 12, the water outlet of the water pump 221 is connected and fixedly connected to the lower end of the delivery pipe 222, the upper end of the delivery pipe 222 is connected and fixedly connected to the spray pipe 223, the spray pipe 223 passes through the upper side wall of the absorption layer 13 and is fixedly connected to the absorption layer 13, multiple nozzles 224 are evenly distributed on the spray pipe 223 and are located at the lower end of the inner part of the absorption layer 13, and the nozzles 224 are connected and fixedly connected to the spray pipe 223.

[0036] The heights of the spray pipes 223 of the three spray assemblies 22 increase sequentially from front to back. The spray pipes 223 are inclined 45° from one end close to the delivery pipe 222 to the end away from the delivery pipe 222. The output direction of the nozzle 224 is vertically downward, and the lowest point of the spray pipe 223 is located above the highest point of the flue gas inlet 15.

[0037] The overflow device 3 includes an overflow pipe 31 and a vent pipe 32. One end of the overflow pipe 31 is tilted 45° downward and passes through the side wall of the slurry pool 12 and is fixedly connected to the slurry pool 12. The middle section of the overflow pipe 31 is located outside the slurry pool 12 and is horizontally arranged. The vent pipe 32 is connected and fixedly connected to the upper end of the middle section of the overflow pipe 31.

[0038] The overflow pipe 31 passes through one end of the slurry pool 12 and is inserted below the lime slurry level in the slurry pool 12. The middle section of the overflow pipe 31 is flush with the lime slurry level in the slurry pool 12. One end of the vent pipe 32 is bent downward.

[0039] The demisting device 4 is a flat-plate demisting device, which is a prior art device. The demisting device 4 is fixedly mounted on the inner wall of the demisting layer 14 .

[0040] When the overflow gas-blocking desulfurization tower is in normal use, the lime slurry in the slurry pool 12 is input or discharged through the liquid inlet pipe and the liquid outlet pipe on the slurry pool 12, and the sulfur-containing flue gas is transported to the lower end of the absorption layer 13 through the flue gas inlet 15. The motor 211 is started, and the motor 211 drives the stirring roller 212 to rotate, and the stirring roller 212 drives the stirring blade 213 to rotate. The stirring blade 213 stirs the lime slurry in the slurry pool 12, and the water pump 221 is started. The water pump 221 drives the lime slurry in the slurry pool 12 into the spray pipe 223 through the conveying pipe 222 and sprays it from the nozzle 224 to the top of the sulfur-containing flue gas. The lime slurry removes the sulfur in the sulfur-containing flue gas, and the sprayed lime slurry falls back into the slurry pool 12. The mist generated during the desulfurization process is removed. The mist device 4 is removed, and the flue gas that meets the standards is discharged through the upper outlet of the demisting layer 14. The 45° tilt setting of the spray pipe 223 prevents the sprayed lime slurry from adhering to the spray pipe 223 and thus scaling to affect the spraying of the lime slurry. The 45° tilt setting of the overflow pipe 31 prevents the lime slurry scaling in the overflow pipe 31 from clogging the pipe. The setting of the vent pipe 32 prevents the flue gas from flowing back with the overflow pipe 31, and prevents the sulfur-containing flue gas from directly escaping and affecting the surrounding environment. The ventilation pipe 32 is bent downward at one end to prevent foreign matter from entering and clogging the pipe. The setting of the overflow pipe 31 allows excess lime slurry to be discharged through the overflow pipe 31, avoiding the lime slurry from entering the flue gas inlet 15 and affecting the transportation of sulfur-containing flue gas.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A desulfurization tower with overflow and gas blocking, comprising a desulfurization tower body (1), characterized in that: The desulfurization tower body (1) is equipped with a desulfurization device (2) for desulfurizing flue gas, an overflow device (3) for overflow and gas blocking, and a demisting device (4) for removing mist. The desulfurization device (2) comprises a stirring assembly (21) for stirring lime slurry and a spray assembly (22) for spraying lime slurry for desulfurization. The stirring assembly (21) and the spray assembly (22) are connected to the desulfurization tower body (1).

2. The overflow gas blocking desulfurization tower according to claim 1, characterized in that: The desulfurization tower body (1) includes a base (11), a slurry pool (12), an absorption layer (13), a demisting layer (14) and a flue gas inlet (15). The slurry pool (12) is fixedly installed on the upper end of the base (11), the lower end of the absorption layer (13) is connected to the slurry pool (12), the lower end of the demisting layer (14) is connected to the absorption layer (13), and the flue gas inlet (15) is located on the side wall of the lower end of the absorption layer (13). The inlet (15) is connected to the absorption layer (13) and is fixedly connected. The upper end of the base (11) is connected to the spray assembly (22). The slurry pool (12) is connected to the stirring assembly (21) and the overflow device (3). The absorption layer (13) is connected to the spray assembly (22). An inlet pipe is provided on the upper side wall of the slurry pool (12). A liquid outlet pipe is provided on the lower side wall of the slurry pool (12). Control valves are provided on the inlet pipe and the outlet pipe of the slurry pool (12).

3. The overflow gas blocking desulfurization tower according to claim 2, characterized in that: The stirring assembly (21) comprises a motor (211), a stirring roller (212), and a plurality of stirring blades (213); the motor (211) is fixedly mounted on the outer wall of the upper end of the slurry pool (12); the output end of the motor (211) passes through the slurry pool (12) and is fixedly connected to the stirring roller (212); the upper and lower ends of the stirring roller (212) are rotatably connected to the top and bottom of the slurry pool (12), respectively; the upper end of the stirring roller (212) is sealed with the slurry pool (12); the plurality of stirring blades (213) are evenly distributed on the outer side of the stirring roller (212); and the stirring blades (213) are fixedly mounted on the outer side of the stirring roller (212).

4. The overflow gas blocking desulfurization tower according to claim 3, characterized in that: The spray assembly (22) is provided with three spray assemblies (22), which are equidistantly distributed at the right end of the slurry pool (12). The spray assembly (22) includes a water pump (221), a delivery pipe (222), a spray pipe (223) and a plurality of nozzles (224). The water pump (221) is fixedly mounted on the upper end of the base (11). The water pump (221) is located on the right side of the slurry pool (12). The water inlet of the water pump (221) is fixedly connected to the slurry pool (12). Then, the water outlet of the water pump (221) is connected and fixedly connected to the lower end of the delivery pipe (222), the upper end of the delivery pipe (222) is connected and fixedly connected to the spray pipe (223), the spray pipe (223) passes through the upper side wall of the absorption layer (13) and is fixedly connected to the absorption layer (13), and a plurality of nozzles (224) are evenly distributed on the spray pipe (223) and are located at the lower end of the inner part of the absorption layer (13), and the nozzles (224) are connected and fixedly connected to the spray pipe (223).

5. The overflow gas blocking desulfurization tower according to claim 4, characterized in that: The heights of the spray pipes (223) of the three spray assemblies (22) increase sequentially from the front to the back. The spray pipes (223) are inclined at 45 degrees from one end close to the delivery pipe (222) to one end away from the delivery pipe (222). The output direction of the nozzles (224) is vertically downward. The lowest point of the spray pipes (223) is located above the highest point of the smoke inlet (15).

6. The overflow gas blocking desulfurization tower according to claim 5, characterized in that: The overflow device (3) comprises an overflow pipe (31) and a vent pipe (32); one end of the overflow pipe (31) is inclined 45 degrees downward and passes through the side wall of the slurry pool (12) to be fixedly connected to the slurry pool (12); the middle section of the overflow pipe (31) is located outside the slurry pool (12) and is arranged horizontally; the vent pipe (32) is connected and fixedly connected to the upper end of the middle section of the overflow pipe (31).

7. The overflow gas blocking desulfurization tower according to claim 6, characterized in that: One end of the overflow pipe (31) passes through the slurry pool (12) and is inserted below the lime slurry level in the slurry pool (12). The middle section of the overflow pipe (31) is flush with the lime slurry level in the slurry pool (12). One end of the vent pipe (32) is bent downward.

8. The overflow gas blocking desulfurization tower according to claim 7, characterized in that: The demisting device (4) is a flat-plate demisting device, and the demisting device (4) is fixedly mounted on the inner wall of the demisting layer (14).

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