Desulfurization and dust removal equipment for industrial boiler tail gas treatment

Abstract

The utility model discloses desulfurization and dust removal equipment for tail gas treatment of an industrial boiler, which comprises an electrostatic dust collector arranged at the outlet end of a flue of the industrial boiler and a desulfurization tower body, a cyclone dust collector is arranged between the air inlet end of the electrostatic dust collector and the outlet of the flue, and the air outlet end of the electrostatic dust collector is connected with a bag-type dust collector. The utility model relates to the technical field of industrial boiler tail gas treatment, a cyclone dust collector is arranged between the air inlet end of an electrostatic dust collector and a flue outlet, large-particle smoke dust in tail gas is preliminarily separated, the air outlet end of the electrostatic dust collector is connected with a bag-type dust collector, and the bag-type dust collector is connected with a negative-pressure axial flow fan. The tail gas subjected to electrostatic adsorption is finely filtered, so that the content of flue gas particles in the tail gas is effectively reduced; a feed liquid pool is arranged at the lower part of the desulfurizing tower body and is matched with the pressurizing and filtering assembly to pump, drain and filter slurry after desulfurization reaction.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial boiler tail gas treatment, in particular to desulfurization and dust removal equipment for industrial boiler tail gas treatment. Background Art

[0002] Industrial boilers generate large amounts of exhaust gas during combustion. If this exhaust is discharged directly into the air through fans, the sulfides and soot contained in the exhaust gas will have a significant impact on the environment. Sulfides floating in the atmosphere can form acid rain, and soot floating in the air can cause health problems and various diseases. Therefore, boiler exhaust gas must be desulfurized and dust-removed before it is discharged. The traditional treatment method is to install an electrostatic precipitator on the flue of the boiler to absorb the smoke in the exhaust gas, and then pass it through a desulfurization tower for desulfurization treatment. However, in the use of existing exhaust gas desulfurization equipment, the spraying method is usually used for the desulfurization process. After the desulfurization solution reacts with the sulfide in the exhaust gas, a large amount of solid particles are precipitated and accumulated in the lower part of the desulfurization equipment. If it is not discharged in time, it is easy to solidify, causing the equipment to fail to work normally; in addition, since the smoke content in the exhaust gas coming out of the boiler is relatively high, the electrostatic precipitator is easily saturated. After the electrostatic precipitator is saturated, the exhaust gas will still contain a large amount of smoke. If it is directly discharged after desulfurization in the desulfurization tower, the smoke content is still relatively high. In view of this, in-depth research was conducted on the above problems, and this case came into being. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a desulfurization and dust removal device for treating industrial boiler tail gas, which solves the problems raised in the background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a desulfurization and dust removal device for treating industrial boiler tail gas, comprising an electrostatic precipitator arranged at the flue outlet of the industrial boiler and a desulfurization tower body, a cyclone dust collector installed between the air inlet end of the electrostatic precipitator and the flue outlet, a bag dust collector connected to the air outlet end of the electrostatic precipitator, a negative pressure axial flow fan connected to the air outlet end of the bag dust collector, an air injection pipe connected to the air outlet end of the negative pressure axial flow fan, one end of the air injection pipe extending into the desulfurization tower body:

[0005] A liquid pool is provided at the lower part of the desulfurization tower body, a drain pipe is connected to the bottom of the liquid pool, one end of the drain pipe is connected to a boost filter assembly, one end of the boost filter assembly is communicated with a liquid silo, a desulfurizer replenishing structure is provided on the top of the liquid silo, a rotary stirring structure and a concentration meter are provided in the liquid silo, a high-pressure pump is connected to one side of the liquid silo, and the high-pressure pump is connected to the desulfurization spray assembly in the desulfurization tower body.

[0006] The above-mentioned desulfurizer replenishing structure includes a storage hopper, a servo drive, a feeding pipe and a spiral feeding rod. The storage hopper is arranged on the top of the liquid bin, the servo drive is installed on the storage hopper, the feeding pipe is arranged on the lower end of the storage hopper and one end extends into the liquid bin, and the spiral feeding rod is arranged on the output end of the servo drive and the lower end extends into the feeding pipe.

[0007] The boost filter assembly includes a boost pump, a filter silo and a filter screen. The inlet end of the boost pump is connected to the drain pipe, the filter silo is arranged on the outlet end of the boost pump, and the filter screen is arranged in the filter silo.

[0008] The above-mentioned desulfurization spray assembly includes an annular tube, a spray head and an injection pipe. The annular tube is layered in the spray tower body along the vertical direction, and the spray head is arranged on the side wall of the annular tube along the inclined direction. One end of the injection pipe is connected to the annular tube and the other end is connected to the outlet end of the high-pressure pump.

[0009] One side of the liquid silo is connected to a water supply pipeline, and an electromagnetic flow valve is installed on the water supply pipeline.

[0010] A plurality of honeycomb guide plates are arranged in the vertical direction inside the desulfurization tower body, and the honeycomb guide plates are arranged alternately with the desulfurization spray components.

[0011] The utility model provides a desulfurization and dust removal equipment for industrial boiler tail gas treatment. It has the following beneficial effects: the desulfurization and dust removal equipment for industrial boiler tail gas treatment improves the existing industrial boiler tail gas treatment equipment, a cyclone dust collector is installed between the air inlet end of the electrostatic precipitator and the flue outlet, and the large particles of smoke dust in the tail gas are initially separated. The air outlet end of the electrostatic precipitator is connected to a bag dust collector, which finely filters the tail gas after electrostatic adsorption, thereby effectively reducing the content of smoke particles in the tail gas; a liquid pool is provided at the lower part of the desulfurization tower body, and cooperates with the boost filter component to pump out the slurry after the desulfurization reaction. Filter to remove the solid particle sediment in the desulfurization solution, realize the recycling of the desulfurization solution, and measure the concentration of the desulfurization solution through the concentration meter. When the concentration of the desulfurization solution is lower than the design value, the desulfurization agent replenishing structure can be used to add an appropriate amount of desulfurization agent into the liquid bin, and the rotary stirring structure can be used for stirring to accelerate the dissolution of the desulfurization agent; the high-pressure pump is connected to the desulfurization spray component in the desulfurization tower body to realize continuous and stable spraying operation, further ensuring that the desulfurization solution fully reacts with the sulfide in the exhaust gas, and improving the exhaust gas treatment effect of industrial boilers. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the main structure of a desulfurization and dust removal equipment for treating industrial boiler tail gas described in the utility model.

[0013] Figure 2 This is a schematic structural diagram of the liquid storage bin portion of the utility model.

[0014] Figure 3 For this utility model Figure 1 Schematic diagram of the locally enlarged structure at position a.

[0015] In the figure: 1. Industrial boiler flue; 2. Electrostatic precipitator; 3. Desulfurization tower body; 4. Cyclone dust collector; 5. Bag dust collector; 6. Negative pressure axial flow fan; 7. Air injection pipe; 8. Liquid tank; 9. Drain pipe; 10. Liquid silo; 11. Rotary stirring structure; 12. Concentration meter; 13. High-pressure pump; 14. Storage hopper; 15. Servo drive; 16. Feed pipe; 17. Screw feed rod; 18. Booster pump; 19. Filter silo; 20. Annular pipe; 21. Sprinkler head; 22. Liquid injection pipe; 23. Water supply pipeline; 24. Electromagnetic flow valve; 25. Honeycomb guide plate. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] Example: In conjunction with the instructions attached Figure 1-3It can be seen that in order to solve the problem in the prior art that a large amount of solid particles are generated after the desulfurization solution reacts with the sulfide in the tail gas and accumulate in the lower part of the desulfurization equipment. If it cannot be discharged in time, it is easy to solidify, resulting in the equipment being unable to work normally. After the electrostatic precipitator 2 is saturated, the tail gas will still contain a large amount of smoke dust. If it is directly discharged after desulfurization in the desulfurization tower, the content of smoke dust is still relatively high. A desulfurization and dust removal equipment for industrial boiler tail gas treatment is specifically designed, including an electrostatic precipitator 2 and a desulfurization tower body 3 arranged at the outlet end of the industrial boiler flue 1. The air inlet end of the electrostatic precipitator 2 is connected to the flue outlet. A cyclone dust collector 4 is installed between the two, the air outlet of the electrostatic precipitator 2 is connected to a bag dust collector 5, the outlet end of the bag dust collector 5 is connected to a negative pressure axial flow fan 6, the air outlet end of the negative pressure axial flow fan 6 is connected to an air injection pipe 7, one end of the air injection pipe 7 extends into the desulfurization tower body 3: wherein the desulfurization tower body 3 is provided with a liquid pool 8 at the bottom of the liquid pool 8, a drain pipe 9 is connected to one end of the drain pipe 9 is connected to a boost filter assembly, one end of the boost filter assembly is connected to a liquid bin 10, a desulfurizer replenishing structure is provided on the top of the liquid bin 10, and a rotary stirring structure 1 is provided in the liquid bin 10 1 and concentration meter 12, a high-pressure pump 13 is connected to one side of the liquid bin 10, and the high-pressure pump 13 is connected to the desulfurization spray assembly in the desulfurization tower body 3. A cyclone dust collector 4 is installed between the air inlet end of the electrostatic precipitator 2 and the flue outlet to perform preliminary separation of large particles of smoke in the tail gas. The air outlet end of the electrostatic precipitator 2 is connected to a bag filter 5 to finely filter the tail gas after electrostatic adsorption, thereby effectively reducing the content of flue gas particles in the tail gas; a liquid pool 8 is provided at the lower part of the desulfurization tower body 3, and cooperates with the boost filter assembly to pump the slurry after the desulfurization reaction. The solid particle precipitate in the desulfurization solution is filtered out to realize the recycling of the desulfurization solution, and the concentration of the desulfurization solution is measured by the concentration meter 12. When the concentration of the desulfurization solution is lower than the design value, the desulfurization agent replenishing structure can be used to add an appropriate amount of desulfurization agent into the liquid bin 10, and the rotary stirring structure 11 can be used for stirring to accelerate the dissolution of the desulfurization agent; the high-pressure pump 13 is connected to the desulfurization spray component in the desulfurization tower body 3, which can realize continuous and stable spraying operation, further ensuring that the desulfurization solution fully reacts with the sulfide in the exhaust gas, and improving the exhaust gas treatment effect of industrial boilers.

[0018] In the specific implementation process, the above-mentioned desulfurizer replenishing structure includes a storage hopper 14, a servo drive 15, a feeding pipe 16 and a spiral feeding rod 17. The storage hopper 14 is arranged on the top of the liquid bin 10, the servo drive 15 is installed on the storage hopper 14, the feeding pipe 16 is arranged on the lower end of the storage hopper 14 and one end extends into the liquid bin 10, the spiral feeding rod 17 is arranged on the output end of the servo drive 15 and the lower end extends into the feeding pipe 16, one side of the liquid bin 10 is connected to a water supply pipeline 23, and an electromagnetic flow valve 24 is installed on the water supply pipeline 23. The concentration measuring meter in the liquid bin 10 is used to measure the concentration of the liquid. 12 monitors the concentration of the desulfurization solution. When the concentration is lower than the design value, the servo drive 15 on the top of the storage hopper 14 is started, and the output end of the servo drive 15 is controlled to rotate at a constant speed, thereby driving the spiral feeding rod 17 to rotate at a constant speed, and cooperating with the discharge pipe to add the solid desulfurizer particles in the storage hopper 14 into the liquid bin 10, and starting the rotary stirring structure 11 to accelerate the dissolution rate of the desulfurizer. In addition, the electromagnetic flow valve 24 on the water supply pipeline 23 can be used to add clean water to the liquid bin 10 to ensure the total amount of desulfurization solution, thereby effectively ensuring the desulfurization treatment efficiency of the industrial boiler exhaust gas.

[0019] In the specific implementation process, the boost filter assembly includes a boost pump 18, a filter silo 19 and a filter screen. The inlet end of the boost pump 18 is connected to the drain pipe 9, the filter silo 19 is arranged on the outlet end of the boost pump 18, and the filter screen is arranged in the filter silo 19; the desulfurization spray assembly includes an annular pipe 20, a spray head 21 and an injection pipe 22. The annular pipe 20 is arranged in layers in the spray tower body along the vertical direction, and the spray head 21 is arranged on the side wall of the annular pipe 20 along the inclined direction. One end of the injection pipe 22 is connected to the annular pipe 20 and the other end is connected to the outlet end of the high-pressure pump 13. Several The honeycomb guide plate 25 is arranged alternately with the desulfurization spray assembly. When in use, the booster pump 18 is used to extract the reaction solution in the liquid pool 8, and inject it into the filter bin after pressurization. Under the blocking effect of the filter mesh plate, the large particles of solid impurities in the slurry are intercepted, and the recyclable solution enters the liquid bin 10 for recycling; after the high-pressure pump 13 extracts the desulfurization solution in the liquid bin 10, it is injected into the annular pipe 20 through the injection pipe 22, and further sprayed out through the spray head 21. The setting of the honeycomb guide plate 25 can further increase the contact area and contact time between the desulfurization solution and the exhaust gas, thereby ensuring the desulfurization treatment effect.

[0020] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A desulfurization and dust removal equipment for treating industrial boiler tail gas, comprising an electrostatic precipitator arranged at the flue outlet of the industrial boiler and a desulfurization tower body, characterized in that: A cyclone dust collector is installed between the air inlet end of the electrostatic precipitator and the flue outlet. The air outlet end of the electrostatic precipitator is connected to a bag dust collector. The outlet end of the bag dust collector is connected to a negative pressure axial flow fan. The air outlet end of the negative pressure axial flow fan is connected to an air injection pipe. One end of the air injection pipe extends into the desulfurization tower body. A liquid pool is provided at the lower part of the desulfurization tower body, a drain pipe is connected to the bottom of the liquid pool, one end of the drain pipe is connected to a boost filter assembly, one end of the boost filter assembly is communicated with a liquid silo, a desulfurizer replenishing structure is provided on the top of the liquid silo, a rotary stirring structure and a concentration meter are provided in the liquid silo, a high-pressure pump is connected to one side of the liquid silo, and the high-pressure pump is connected to the desulfurization spray assembly in the desulfurization tower body.

2. The desulfurization and dust removal equipment for industrial boiler tail gas treatment according to claim 1, characterized in that: The desulfurizer replenishing structure includes a storage hopper, a servo drive, a feeding pipe and a spiral feeding rod. The storage hopper is arranged on the top of the liquid bin, the servo drive is installed on the storage hopper, the feeding pipe is arranged on the lower end of the storage hopper and one end extends into the liquid bin, and the spiral feeding rod is arranged on the output end of the servo drive and the lower end extends into the feeding pipe.

3. The desulfurization and dust removal equipment for industrial boiler tail gas treatment according to claim 1, characterized in that: The boost filter assembly includes a boost pump, a filter silo and a filter screen. The inlet end of the boost pump is connected to the drain pipe. The filter silo is arranged on the outlet end of the boost pump. The filter screen is arranged in the filter silo.

4. The desulfurization and dust removal equipment for industrial boiler tail gas treatment according to claim 1, characterized in that: The desulfurization spray assembly includes an annular tube, a spray head and an injection pipe. The annular tube is layered in the spray tower body along the vertical direction, and the spray head is arranged on the side wall of the annular tube along the inclined direction. One end of the injection pipe is connected to the annular tube and the other end is connected to the outlet end of the high-pressure pump.

5. The desulfurization and dust removal equipment for industrial boiler tail gas treatment according to claim 1, characterized in that: One side of the liquid silo is connected to a water supply pipeline, and an electromagnetic flow valve is installed on the water supply pipeline.

6. The desulfurization and dust removal equipment for industrial boiler tail gas treatment according to claim 1, characterized in that: A plurality of honeycomb guide plates are arranged in the vertical direction in the desulfurization tower body, and the honeycomb guide plates and the desulfurization spray components are arranged in a staggered manner.

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