CN212915033U - Boiler tail gas treatment device - Google Patents

Abstract

The utility model discloses a boiler tail gas treatment device, gravity dust collector, flue gas intake pipe, gas-supply pipe, pocket type dust collector casing, first spray housing, first liquid supply casing, second spray housing, second liquid supply casing, tail gas discharge pipe, baffle, first motor, speed reducer, pivot, elastic hammer, draught fan, elastic plate, skeleton, sack, pump, main water pipe, distributive pipe, shower head, ball nut, ball screw and second motor, this boiler tail gas treatment device, do benefit to shake off the dust to pocket type dust collector casing bottom and collect, can calcine into the coal ash brick and recycle under high pressure; the filtered flue gas enters the first spraying shell and the second spraying shell in sequence through the gas conveying pipe to be sprayed, 20% of lime water and 30% of urea solution are mixed with components in the flue gas to be precipitated, the precipitate is gypsum and farmland fertilizer, the height of the water distribution pipe can be adjusted, the use is facilitated, and the spraying efficiency is improved.

Description

Boiler tail gas treatment device

Technical Field

The utility model relates to a boiler tail gas treatment technical field specifically is a boiler tail gas processing apparatus.

Background

When the boiler is used, tail gas generated by natural gas combustion mainly comprises carbon dioxide, water vapor and nitrogen, and the volume ratio of the tail gas in flue gas is respectively about: 14%, 11% and 72%. Besides the three substances, the tail gas of the gas-fired boiler also contains pollutants such as CO2, SO2, NO2, solid particles and the like which can cause harm to the atmospheric environment. The existing boiler tail gas treatment device is not beneficial to secondary utilization of reactants, the height of the spray pipe is not adjustable, and the spray efficiency is low, so that the boiler tail gas treatment device is very necessary.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a boiler tail gas processing apparatus to solve the problem that proposes among the above-mentioned background art.

The purpose of the utility model can be realized by the following technical scheme:

a boiler tail gas treatment device comprises a gravity dust collector, wherein the air inlet end of the gravity dust collector is communicated with a flue gas inlet pipe, the air outlet end of the gravity dust collector is communicated with a shell of a bag type dust collector through a gas pipe, a partition plate is vertically arranged on one side of the inner wall of the top of the shell of the bag type dust collector, an elastic plate is arranged between one side of the partition plate and the inner wall of the other side of the shell of the bag type dust collector, the other side of the top of the elastic plate is contacted with an elastic hammer, the elastic hammer is hinged with a middle bulge of a rotating shaft, one end of the rotating shaft is fixedly connected with the output end of a first motor through a speed reducer, the other end of the rotating shaft is used for installing the inner wall of the top of the shell of the bag type dust collector through a first bearing seat, three frameworks are vertically embedded on the elastic plate, cloth bags are sleeved outside the frameworks, a draught fan is arranged on one side, the utility model discloses a spray tank, including first spray casing, second spray casing, first spray casing, and main water piping connection has two distributive pipes, the bottom equidistance of distributive pipe is provided with a plurality of shower heads, the other end of main water piping runs through first spray casing and the first inside pump intercommunication that supplies liquid casing, the top of first spray casing is passed through gas-supply pipe and second spray casing intercommunication, and second spray casing bottom below also is provided with the second and supplies liquid casing, the top intercommunication that the second sprayed the casing has the tail gas delivery pipe.

As a further aspect of the present invention: and lever type ash valves are respectively arranged at the bottoms of the gravity dust collector and the shell of the cloth bag type dust collector.

As a further aspect of the present invention: the second motor is installed to first bottom inner wall one side that sprays the casing, and the output of second motor and ball screw's bottom rigid coupling, ball screw is last to correspond the cooperation and to install two ball nuts, and one side of ball nut all with the distributive pipe rigid coupling, ball screw's the other end passes through the second bearing seat and is connected with first inner wall one side that sprays the casing.

As a further aspect of the present invention: the second motor is a waterproof servo motor.

As a further aspect of the present invention: the first spraying shell and the second spraying shell, and the first liquid supply shell and the second liquid supply shell have the same internal structure, and 20% of lime water and 30% of urea solution are respectively arranged in the first liquid supply shell and the second liquid supply shell.

As a further aspect of the present invention: the tail end of the tail gas discharge pipe is provided with an on-line monitor, and the on-line monitor is a TA-RQ-NOX on-line monitor with a pretreatment nitrogen oxide.

Compared with the prior art, the utility model discloses the beneficial effect who reaches is: according to the boiler tail gas treatment device, boiler flue gas is collected into coarse particles through a gravity dust collector, most dust is isolated outside a cloth bag on a framework through an induced draft fan, a speed reducer can be driven through a first motor in a closing gap of the induced draft fan, a rotating shaft drives an elastic hammer to rotate, an elastic plate is slightly hammered, the dust falls to the bottom of a shell of a cloth bag type dust collector to be collected, and the dust can be calcined into coal ash bricks at high pressure for reuse; the filtered flue gas enters the first spraying shell and the second spraying shell in sequence through the gas conveying pipe to be sprayed, 20% of lime water and 30% of urea solution are mixed with components in the flue gas to be precipitated, the precipitate is gypsum and farmland fertilizer, the height of the water distribution pipe can be adjusted, the use is facilitated, and the spraying efficiency is improved.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is an overall perspective view of the present invention;

FIG. 2 is a schematic view of the internal structure of the housing of the bag-type dust collector of the present invention;

fig. 3 is a schematic view of the internal structure of the first spray casing of the present invention;

in the figure: 1. a gravity dust collector; 2. a flue gas inlet pipe; 3. a gas delivery pipe; 4. a bag house; 5. a first spray housing; 6. a first liquid supply housing; 7. a second spray housing; 8. a second liquid supply housing; 9. a tail gas discharge pipe; 10. a partition plate; 11. a first motor; 12. a speed reducer; 13. a rotating shaft; 14. an elastic hammer; 15. a first bearing housing; 16. an induced draft fan; 17. an elastic plate; 18. a framework; 19. a cloth bag; 20. a pump; 21. a main water pipe; 22. a water diversion pipe; 23. a shower head; 24. a ball nut; 25. a ball screw; 26. a second motor; 27. and a second bearing seat.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a boiler tail gas treatment device comprises a gravity dust collector 1, wherein an air inlet end of the gravity dust collector 1 is communicated with a flue gas inlet pipe 2, an air outlet end of the gravity dust collector 1 is communicated with a bag type dust collector shell 4 through an air conveying pipe 3, a partition plate 10 is vertically arranged on one side of the inner wall of the top of the bag type dust collector shell 4, an elastic plate 17 is arranged between one side of the partition plate 10 and the inner wall of the other side of the bag type dust collector shell 4, the other side of the top of the elastic plate 17 is contacted with an elastic hammer 14, the elastic hammer 14 is hinged with a middle bulge of a rotating shaft 13, one end of the rotating shaft 13 is fixedly connected with the output end of a first motor 11 through a speed reducer 12, the other end of the rotating shaft is fixedly connected with the inner wall of the top of the bag type dust collector shell 4 through a first bearing seat 15, three frameworks 18 are vertically embedded on the elastic plate 17, bag type bags, the air outlet end of the induced draft fan 16 is communicated with the bottom of one side of the first spraying shell 5 through the air delivery pipe 3, a main water pipe 21 is arranged in the first spraying shell 5, the main water pipe 21 is connected with two water distribution pipes 22, a plurality of spraying heads 23 are arranged at the bottoms of the water distribution pipes 22 at equal intervals, the other end of the main water pipe 21 penetrates through the first spraying shell 5 to be communicated with a pump 20 in the first liquid supply shell 6, the top of the first spraying shell 5 is communicated with the second spraying shell 7 through the air delivery pipe 3, a second liquid supply shell 8 is also arranged below the bottom of the second spraying shell 7, and the top of the second spraying shell 7 is communicated with a tail gas discharge pipe 9;

the bottom parts of the gravity dust collector 1 and the bag type dust collector shell 4 are respectively provided with a lever type ash discharging valve, so that collected ash is discharged conveniently;

a second motor 26 is installed on one side of the inner wall of the bottom of the first spraying shell 5, the output end of the second motor 26 is fixedly connected with the bottom end of a ball screw 25, two ball nuts 24 are correspondingly installed on the ball screw 25 in a matched mode, one sides of the ball nuts 24 are fixedly connected with the water distribution pipes 22, and the other end of the ball screw 25 is connected with one side of the inner wall of the first spraying shell 5 through a second bearing seat 27, so that the positions of the two water distribution pipes 22 can be adjusted conveniently;

the second motor 26 is a waterproof servo motor, and is beneficial to driving the ball screw 25 to rotate forward and backward;

the internal structures of the first spraying shell 5 and the second spraying shell 7 and the first liquid supply shell 6 and the second liquid supply shell 8 are completely the same, and 20% of lime water and 30% of urea solution are respectively arranged in the first liquid supply shell 6 and the second liquid supply shell 8, so that the precipitates are gypsum and farmland fertilizer respectively, and the reutilization is facilitated;

an on-line monitor is arranged at the tail end of the tail gas discharge pipe 9, and is a TA-RQ-NOX on-line monitor for pre-treating nitric oxide, so that the tail gas is ensured to be discharged up to the standard.

The utility model discloses a theory of operation: the boiler flue gas is collected into coarse particles through the gravity dust collector 1, most dust is isolated outside a cloth bag 19 on a framework 18 through an induced draft fan 16, a speed reducer 12 can be driven through a first motor 11 in a closing gap of the induced draft fan 16, a rotating shaft 13 drives an elastic hammer 14 to rotate, an elastic plate 17 is slightly hammered, the dust falls to the bottom of a shell 4 of the cloth bag type dust collector to be collected, and the dust can be calcined into a coal ash brick under high pressure for reuse; the filtered flue gas enters the first spraying shell 5 and the second spraying shell 7 through the gas conveying pipe 3 in sequence to be sprayed, 20% of lime water and 30% of urea solution are mixed with components in the flue gas to be precipitated, the precipitate is gypsum and farmland fertilizer, and the second motor 26 can drive the ball screw 25 to rotate, so that the two ball nuts 24 drive the water distribution pipe 22 to adjust the height, the use is facilitated, and finally the flue gas is discharged through the tail gas discharge pipe 9.

It is noted that, herein, relational terms such as first and second, and the like may be 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.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The boiler tail gas treatment device is characterized by comprising a gravity dust collector (1), wherein a gas inlet end of the gravity dust collector (1) is communicated with a flue gas inlet pipe (2), a gas outlet end of the gravity dust collector (1) is communicated with a bag type dust collector shell (4) through a gas pipe (3), a baffle plate (10) is vertically installed on one side of the inner wall of the top of the bag type dust collector shell (4), an elastic plate (17) is installed between one side of the baffle plate (10) and the inner wall of the other side of the bag type dust collector shell (4), the other side of the top of the elastic plate (17) is contacted with an elastic hammer (14), the elastic hammer (14) is hinged with a middle bulge of a rotating shaft (13), one end of the rotating shaft (13) is fixedly connected with an output end of a first motor (11) through a speed reducer (12), and the other end of the elastic plate is connected with the inner wall of the top of the bag type dust collector shell (4) through a first bearing, the improved spraying device is characterized in that three frameworks (18) are vertically embedded on the elastic plate (17), cloth bags (19) are sleeved outside the frameworks (18), a draught fan (16) is installed on one side of the top of the elastic plate (17), the air outlet end of the draught fan (16) is communicated with the bottom of one side of the first spraying shell (5) through an air conveying pipe (3), a main water pipe (21) is arranged in the first spraying shell (5), the main water pipe (21) is connected with two water distribution pipes (22), a plurality of spraying heads (23) are arranged at the bottom of the water distribution pipes (22) at equal intervals, the other end of the main water pipe (21) penetrates through the first spraying shell (5) and is communicated with a pump (20) inside the first liquid supply shell (6), the top of the first spraying shell (5) is communicated with the second spraying shell (7) through the air conveying pipe (3), and a second liquid supply shell (8) is also arranged below the bottom of the second spraying shell (7), the top of the second spraying shell (7) is communicated with a tail gas discharge pipe (9).

2. The boiler tail gas treatment device according to claim 1, wherein a lever type ash valve is mounted at the bottom of each of the gravity dust collector (1) and the bag type dust collector shell (4).

3. The boiler tail gas treatment device according to claim 1, wherein a second motor (26) is installed on one side of the inner wall of the bottom of the first spraying shell (5), the output end of the second motor (26) is fixedly connected with the bottom end of a ball screw (25), two ball nuts (24) are correspondingly installed on the ball screw (25) in a matched manner, one sides of the ball nuts (24) are fixedly connected with the water diversion pipe (22), and the other end of the ball screw (25) is connected with one side of the inner wall of the first spraying shell (5) through a second bearing seat (27).

4. The boiler tail gas treatment device according to claim 3, characterized in that the second motor (26) is a waterproof servo motor.

5. The boiler tail gas treatment device according to claim 1, characterized in that the internal structures of the first spray shell (5) and the second spray shell (7) and the first liquid supply shell (6) and the second liquid supply shell (8) are completely the same, and 20% of lime water and 30% of urea solution are respectively arranged in the first liquid supply shell (6) and the second liquid supply shell (8).

6. The boiler tail gas treatment device according to claim 1, characterized in that the tail end of the tail gas discharge pipe (9) is provided with an on-line monitor, and the on-line monitor is a TA-RQ-NOX on-line monitor for pre-treating nitrogen oxides.

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