CN113634108A

CN113634108A - A desulfurization and denitrification device for boiler flue gas

Info

Publication number: CN113634108A
Application number: CN202111063800.4A
Authority: CN
Inventors: 高绍春; 魏正峰; 翁武强
Original assignee: Huaneng Fujian Zhangzhou Energy Co ltd
Current assignee: Huaneng Fujian Zhangzhou Energy Co ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2021-11-12

Abstract

The invention relates to the technical field of flue gas desulfurization and denitrification, and discloses a desulfurization and denitrification device for boiler flue gas. A smoke pipe is inserted intermittently, and a main pipe is inserted on the other side of the processing box. One end of the smoke pipe is fixedly connected with a convex smoke filter plate, and the convex smoke filter plate is located in the shell. The circumference of the smoke pipe is A support frame is fixedly connected between the inner walls, one side of the support frame is fixedly connected with a double-shaft extension asynchronous motor, one end of one output shaft of the double-shaft extension asynchronous motor is fixedly connected with a plurality of fan blades, and the other output shaft of the double-shaft extension asynchronous motor is fixedly connected. One end is fixedly connected with two cleaning brushes through the convex smoke filter plate. The invention can filter and remove the solids in the boiler flue gas, avoid the blockage of the filter mechanism in the dechlorination and denitrification equipment, and do not need to replace the convex smoke filter plate frequently, thereby improving the use effect of flue gas desulfurization and denitrification.

Description

Desulfurization and denitrification device for boiler flue gas

Technical Field

The invention relates to the technical field of flue gas desulfurization and denitration, in particular to a desulfurization and denitration device for boiler flue gas.

Background

In recent years, in order to control SO2 pollution, prevent acid rain harm and accelerate the development of flue gas desulfurization and denitration technology and industry in China, the flue gas desulfurization and denitration technology is a boiler flue gas purification technology applied to the chemical industry of generating multiple nitrogen oxides and sulfur oxides, SO that the boiler flue gas desulfurization and denitration technology becomes an important development subject, and desulfurization and denitration treatment of the boiler flue gas by using a desulfurization and denitration device of the boiler flue gas is required before the boiler flue gas is discharged.

At present, most of the existing boiler flue gas desulfurization and denitrification devices have the following defects: before boiler flue gas desulfurization denitration, because can not do the solid floater in the flue gas and filter in advance for filtering mechanism in the dechlorination denitration device easily blocks up, and changes the clearance too frequently, influences flue gas desulfurization denitration's use, to sum up, the SOx/NOx control device of current boiler flue gas still can not agree with actual need well mostly.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a desulfurization and denitrification device for boiler flue gas, which mainly aims to solve the problems that before desulfurization and denitrification of the boiler flue gas, solid floating materials in the flue gas cannot be filtered in advance, so that a filtering mechanism in a dechlorination and denitrification device is easy to block, and the use of the flue gas desulfurization and denitrification is influenced due to too frequent replacement and cleaning.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a SOx/NOx control device of boiler flue gas, includes the casing and handles the case, peg graft in one side of casing and have into the tobacco pipe, peg graft between casing and the processing case and have logical tobacco pipe, the opposite side of handling the case is pegged graft and is had the trunk line, the one end fixedly connected with convex surface smoke filter plate that leads to the tobacco pipe, convex surface smoke filter plate is located the casing, fixedly connected with support frame between the circumference inner wall of logical tobacco pipe, asynchronous motor is stretched to one side fixedly connected with biax of support frame, and the biax is stretched a plurality of flabellums of one end fixedly connected with of an output shaft of asynchronous motor, and the biax is stretched the one end of another output shaft of asynchronous motor and is passed two clearance brushes of convex surface smoke filter plate fixedly connected with, clearance brush and convex surface smoke filter plate contact.

Furthermore, one side of the shell is provided with a sealing plate, one side of the smoke passing pipe is provided with a sealing arc plate, and one side of the processing box is provided with a sealing door.

On the basis of aforementioned scheme, one side of handling the case is sealed to be pegged graft and is had the feed liquor pipe, handles one side outer wall fixedly connected with pump body of case, and pump body input is pegged graft and is had logical liquid pipe, leads to the other end of liquid pipe and handles the case intercommunication, and the output of the pump body is pegged graft and is had the drain pipe, and the other end of drain pipe is sealed to be pegged graft and is had the wave pipe, and the wave pipe is installed at the top outer wall of handling the case, and the other end of wave pipe is equipped with the sealing plug, and the bottom of wave pipe is equipped with a plurality of shower nozzles, and the shower nozzle is located handles the incasement.

As a further scheme of the invention, two first filter plates are clamped between the inner walls of the multiple sides of the treatment box, and an activated carbon adsorption plate is embedded at one side of the treatment box close to the main pipeline.

Further, a fixing frame is fixedly connected between the circumferential inner walls of the main pipeline, a fan is fixedly connected to the top of the fixing frame, and a second filtering plate is fixedly connected between the circumferential inner walls of the main pipeline above the fan.

On the basis of the scheme, the bottom end of the main pipeline is in threaded connection with a sealing cover, the outer wall of the bottom of the sealing cover is fixedly connected with a rotating disc, and the top end of the main pipeline is sleeved with a waterproof cover.

As a further scheme of the invention, a smoke outlet pipe is inserted into one side of the main pipeline, the inner circumferential wall of the main pipeline is fixedly connected with a smoke outlet pipe, the smoke outlet pipe is positioned above the second filter plate, a fixed pipe is inserted into one side of the main pipeline, the other end of the fixed pipe is fixedly connected with a connecting pipe, and the other end of the connecting pipe is communicated with the shell.

Furthermore, valve actuators are arranged on one side of the smoke outlet pipe, the top of the smoke outlet hopper and one side of the fixed pipe.

(III) advantageous effects

Compared with the prior art, the invention provides a boiler flue gas desulfurization and denitrification device, which has the following beneficial effects:

1. according to the invention, the arrangement of the convex-surface smoke filter plate can be used for filtering and removing solids in the boiler flue gas, so that the blocking condition of a filtering mechanism in a dechlorination and denitration device is avoided, and the cleaning brush is driven by the double-shaft extension asynchronous motor to rotate, so that the solids are adhered to the convex-surface smoke filter plate to be cleaned, the convex-surface smoke filter plate does not need to be frequently replaced, and the using effect of flue gas desulfurization and denitration is improved.

2. According to the invention, the pump body, the wavy pipe and the spray head are arranged to carry out desulfurization treatment on the boiler flue gas, and then the activated carbon adsorption plate is used for carrying out denitration treatment on the boiler flue gas, so that the desulfurization and denitration treatment on the boiler flue gas is realized.

3. The used desulfurization liquid is filtered by the first filter plate and then falls into the treatment box, and then enters the liquid through pipe, so that the desulfurization liquid can be reused, the use efficiency of the desulfurization liquid is improved, and resources are saved.

4. According to the invention, the smoke outlet pipe, the fixed pipe, the smoke outlet hopper and the connecting pipe are arranged, so that sampling detection can be carried out on the boiler smoke after denitration and denitration, when the detection is qualified, the boiler smoke is directly discharged, and when the detection is unqualified, the boiler smoke after denitration and desulfurization is conveyed back into the shell for continuous treatment, thereby being beneficial to the protection of air.

Drawings

FIG. 1 is a schematic perspective view of an embodiment 1 of a desulfurization and denitrification apparatus for boiler flue gas according to the present invention;

FIG. 2 is a schematic partial sectional view of an embodiment 1 of a desulfurization and denitrification apparatus for boiler flue gas according to the present invention;

FIG. 3 is a schematic view of a partial cross-sectional view of an embodiment 1 of a desulfurization and denitrification apparatus for boiler flue gas according to the present invention;

FIG. 4 is a partial cross-sectional view of a boiler flue gas desulfurization and denitrification apparatus in accordance with embodiment 1 of the present invention;

FIG. 5 is a schematic perspective view of an embodiment 2 of a desulfurization and denitrification apparatus for boiler flue gas according to the present invention;

fig. 6 is a schematic partial sectional view of a boiler flue gas desulfurization and denitrification apparatus in embodiment 2 of the present invention.

In the figure: 1. a housing; 2. a smoke inlet pipe; 3. ventilating a smoke pipe; 4. a treatment tank; 5. a main pipeline; 6. a pump body; 7. a liquid pipe is communicated; 8. a liquid outlet pipe; 9. a wave tube; 10. a sealing plug; 11. a spray head; 12. an activated carbon adsorption plate; 13. a first filter plate; 14. a convex smoke filter; 15. a support frame; 16. a double-shaft extension asynchronous motor; 17. a fan blade; 18. cleaning a brush; 19. a sealing plate; 20. sealing the arc plate; 21. a sealing door; 22. a liquid inlet pipe; 23. a waterproof cover; 24. a sealing cover; 25. rotating the disc; 26. a second filter plate; 27. a fixed mount; 28. a fan; 29. a fixed tube; 30. a connecting pipe; 31. discharging the smoke tube; 32. discharging the tobacco pipe; 33. a valve actuator.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-4, a desulfurization and denitrification device for boiler flue gas comprises a casing 1 and a processing box 4, wherein a flue gas inlet pipe 2 is inserted into one side of the casing 1, the boiler flue gas is conveyed into the casing 1 from the flue gas inlet pipe 2, a flue gas passing pipe 3 is inserted between the casing 1 and the processing box 4, a main pipe 5 is inserted into the other side of the processing box 4, one end of the flue gas passing pipe 3 is fixed with a convex smoke filter plate 14 through a bolt, the convex smoke filter plate 14 filters solid matters in the boiler flue gas and then conveys the boiler flue gas into the flue gas passing pipe 3, the convex smoke filter plate 14 is positioned in the casing 1, a support frame 15 is fixed between the circumferential inner walls of the flue gas passing pipe 3 through a bolt, a double-shaft extension asynchronous motor 16 is fixed on one side of the support frame 15 through a bolt, a plurality of fan blades 17 are fixed on one end of an output shaft of the double-shaft extension asynchronous motor 16 through a bolt, the fan blades 17 are driven by the double-shaft extension asynchronous motor 16 to rotate, thereby produce the transport that suction comes the supplementary boiler flue gas for the process that the flue gas was carried, the biax stretches the one end of another output shaft of asynchronous motor 16 and passes convex surface soot filter 14 and be fixed with two cleaning brushes 18 through the bolt, cleaning brush 18 and convex surface soot filter 14 contact, and biax stretches asynchronous motor 16 and drives cleaning brush 18 and rotate to the adhesion is cleared up at the solid on the convex surface soot filter 14.

One side of the shell 1 is provided with a sealing plate 19, the sealing plate 19 is opened, solids collected in the shell 1 are led out, one side of the smoke through pipe 3 is provided with a sealing arc plate 20, the sealing arc plate 20 is convenient to overhaul parts in the smoke through pipe 3, one side of the treatment box 4 is provided with a sealing door 21, one side of the treatment box 4 is hermetically inserted with a liquid inlet pipe 22, one outer wall of one side of the treatment box 4 is fixedly provided with a pump body 6 through bolts, the input end of the pump body 6 is inserted with a liquid through pipe 7, the other end of the liquid through pipe 7 is communicated with the treatment box 4, the output end of the pump body 6 is inserted with a liquid outlet pipe 8, the other end of the liquid outlet pipe 8 is hermetically inserted with a wave pipe 9, the wave pipe 9 is arranged on the outer wall of the top of the treatment box 4, the other end of the wave pipe 9 is provided with a sealing plug 10, the bottom of the wave pipe 9 is provided with a plurality of spray nozzles 11, under the action of the pump body 6, the desulfurization liquid in the treatment box 4 is conveyed into the liquid through pipe 7, then, the desulfurization liquid is conveyed to the wave inlet pipe 9 through the liquid outlet pipe 8, finally, the boiler flue gas sprayed into the treatment box 4 from the spray head 11 is desulfurized, the spray head 11 is positioned in the treatment box 4, two first filter plates 13 are clamped between the inner walls of the multiple sides of the treatment box 4, the used desulfurization liquid is filtered by the first filter plates 13 and falls into the treatment box 4 and then enters the liquid through pipe 7 for reuse, one side of the treatment box 4 close to the main pipe 5 is embedded with an active carbon adsorption plate 12, the desulfurized boiler flue gas is denitrified by the active carbon adsorption plate 12 and then enters the main pipe 5, a fixing frame 27 is fixed between the inner walls of the circumference of the main pipe 5 through bolts, a fan 28 is fixed at the top of the fixing frame 27 through bolts, a second filter plate 26 is fixed between the inner walls of the circumference of the main pipe 5 above the fan 28 through bolts, the desulfurized and denitrated boiler flue gas is conveyed upwards by the fan 28, filter the tiny particle impurity in the boiler flue gas through second filter 26 again, discharge from the top of trunk line 5, the bottom threaded connection of trunk line 5 has sealed lid 24, and the bottom outer wall of sealed lid 24 has rolling disc 25 through the bolt fastening, and the top of trunk line 5 has cup jointed buckler 23, and buckler 23 prevents that the rainwater from falling into in the trunk line 5.

The working principle of the embodiment is as follows: when in use, the electric appliance of the device is connected with an external controller, firstly, boiler flue gas is conveyed into the shell 1 from the flue gas inlet pipe 2, solid matters in the boiler flue gas are filtered by the convex smoke filter 14 and then conveyed into the flue gas through pipe 3, a double-shaft-extension asynchronous motor 16 is started, fan blades 17 are driven by the double-shaft-extension asynchronous motor 16 to rotate, so that a suction force is generated to assist in conveying the boiler flue gas, the process of conveying the flue gas is accelerated, meanwhile, the double-shaft-extension asynchronous motor 16 drives the cleaning brush 18 to rotate, so that the solid matters adhered to the convex smoke filter 14 are cleaned, the cleaned solid matters fall into the shell 1 to be collected, then the boiler flue gas is conveyed into the treatment box 4 from the flue gas through pipe 3, then, desulfurization liquid is conveyed into the treatment box 4 from the liquid inlet pipe 22, then, the pump body 6 is started, and the desulfurization liquid in the treatment box 4 is conveyed into the liquid inlet pipe 7 under the action of the pump body 6, then, the doctor solution advances the wave pipe 9 through the delivery pipe 8 transport, finally, spout the boiler flue gas to handling incasement 4 from shower nozzle 11, carry out the desulfurization to the boiler flue gas, the doctor solution after using falls to handling incasement 4 after the filtration of first filter 13, reentrant liquid pipe 7 used repeatedly, then, the boiler flue gas after the desulfurization passes through in the main pipeline 5 is gone into behind the denitration of active carbon adsorption plate 12, start fan 28, utilize fan 28 to upwards carry the boiler flue gas after the SOx/NOx control, filter the tiny particle impurity in the boiler flue gas through second filter 26, discharge from the top of main pipeline 5.

Example 2

Referring to fig. 5-6, a desulfurization and denitrification device for boiler flue gas, a flue gas outlet pipe 31 is inserted into one side of a main pipe 5, a flue gas outlet pipe 32 is fixed to the inner circumferential wall of the main pipe 5 through bolts, the flue gas outlet pipe 32 is located above a second filter plate 26, a fixed pipe 29 is inserted into one side of the main pipe 5, the other end of the fixed pipe 29 is connected with a connecting pipe 30 through a flange, the other end of the connecting pipe 30 is communicated with a casing 1, one side of the flue gas outlet pipe 31, a valve actuator 33 is arranged at the top of the flue gas outlet pipe 32 and one side of the fixed pipe 29, the flue gas outlet pipe 31, the fixed pipe 29, the flue gas outlet pipe 32 and the connecting pipe 30 can sample and detect the boiler flue gas after denitrification and denitrification, when the detection is qualified, the flue gas outlet pipe is directly discharged, and when the detection is unqualified, the boiler flue gas after desulfurization and denitrification is conveyed back into the casing 1 for continuous treatment.

The working principle of the embodiment is as follows: when the device is used, firstly, the external controller controls the valve actuator 33 of the smoke outlet pipe 31 to be started, the boiler smoke after desulfurization and denitrification is sampled and detected from the smoke outlet pipe 31, when the detection result is qualified, the boiler smoke is discharged from the smoke outlet pipe 32, when the detection structure is unqualified, the external controller controls the valve actuator 33 of the smoke outlet pipe 32 to be closed, the valve actuator 33 of the connecting pipe 30 is opened, the boiler smoke after desulfurization and denitrification is conveyed back to the shell 1 from the connecting pipe 30 to be continuously processed until the boiler smoke reaches the emission standard and then is discharged.

The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

In the description herein, it is to be noted that, unless expressly stated or limited otherwise, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection may be mechanical or electrical, and may be direct or indirect via an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, it is noted that relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A desulfurization and denitrification device for boiler flue gas, comprising a shell (1) and a treatment box (4), characterized in that one side of the shell (1) is plugged with a flue gas inlet pipe (2), and the shell A smoke pipe (3) is inserted between the body (1) and the treatment box (4), and a main pipe (5) is inserted into the other side of the treatment box (4), and one end of the smoke pipe (3) is inserted. A convex smoke filter plate (14) is fixedly connected, the convex smoke filter plate (14) is located in the casing (1), and a support frame (15) is fixedly connected between the circumferential inner walls of the smoke passage pipe (3). One side of (15) is fixedly connected with a double-shaft extension asynchronous motor (16), one end of an output shaft of the double-shaft extension asynchronous motor (16) is fixedly connected with a plurality of fan blades (17), and the double-shaft extension asynchronous motor (16) Two cleaning brushes (18) are fixedly connected to one end of the other output shaft through the convex smoke filter plate (14), and the cleaning brushes (18) are in contact with the convex smoke filter plate (14).

2. The device for desulfurization and denitrification of boiler flue gas according to claim 1, characterized in that: one side of the casing (1) is provided with a sealing plate (19), and one side of the flue gas pipe (3) is provided with a sealing plate (19). A sealing arc plate (20) is provided, and a sealing door (21) is provided on one side of the processing box (4).

3. A desulfurization and denitration device for boiler flue gas according to claim 1, characterized in that: one side of the treatment box (4) is sealed and plugged with a liquid inlet pipe (22), and the The outer wall of one side is fixedly connected with a pump body (6), the input end of the pump body (6) is plugged with a liquid passage pipe (7), and the other end of the liquid passage pipe (7) is communicated with the processing box (4), and the pump body (6) A liquid outlet pipe (8) is inserted into the output end of the The other end of the pipe (9) is provided with a sealing plug (10), the bottom of the wave pipe (9) is provided with a plurality of spray heads (11), and the spray heads (11) are located in the treatment box (4).

4. The device for desulfurization and denitration of boiler flue gas according to claim 1, characterized in that: two first filter plates (13) are clamped between the multi-sided inner walls of the treatment box (4). An activated carbon adsorption plate (12) is embedded on the side of the box (4) close to the main pipeline (5).

5. A device for desulfurization and denitrification of boiler flue gas according to claim 1, characterized in that: a fixing frame (27) is fixedly connected between the circumferential inner walls of the main pipe (5), and the A fan (28) is fixedly connected to the top, and a second filter plate (26) is fixedly connected between the circumferential inner walls of the main duct (5) above the fan (28).

6. The device for desulfurization and denitrification of boiler flue gas according to claim 1, wherein the bottom end of the main pipe (5) is threadedly connected with a sealing cover (24), and the bottom outer wall of the sealing cover (24) is threaded. A rotating disk (25) is fixedly connected, and a waterproof cover (23) is sleeved on the top of the main pipe (5).

7. The device for desulfurization and denitrification of boiler flue gas according to claim 1, characterized in that: one side of the main pipe (5) is plugged with a smoke outlet pipe (31), and the circumference of the main pipe (5) is An outlet pipe (32) is fixedly connected to the inner wall, and the outlet pipe (32) is located above the second filter plate (26). One end is fixedly connected with a connecting pipe (30), and the other end of the connecting pipe (30) is communicated with the casing (1).

8 . The device for desulfurization and denitrification of boiler flue gas according to claim 7 , characterized in that: one side of the smoke outlet pipe ( 31 ), the top of the smoke outlet pipe ( 32 ), and one side of the fixed pipe ( 29 ) Both sides are provided with valve actuators (33).