CN210874633U

CN210874633U - Coal fired boiler flue gas processing apparatus

Info

Publication number: CN210874633U
Application number: CN201921495901.7U
Authority: CN
Inventors: 陈纪奎; 李益春; 马爱民; 艾晨光; 李美玲
Original assignee: Chifeng Jianzhi Management Co ltd
Current assignee: Chifeng Jianzhi Management Co ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-06-30
Anticipated expiration: 2029-09-10

Abstract

A coal-fired boiler flue gas treatment device comprises a shell, an air inlet flow equalizing pipe, a support, an air deflector, an ash bucket, a middle box body, an upper box body and a smoke exhaust device; the flue gas of the coal-fired boiler flows into the shell through the air inlet flow equalizing pipe, an air outlet at the top of the shell is connected with the smoke exhaust device, and the bottom of the shell is supported on the bracket; the ash bucket is arranged in the cone at the bottom of the shell, and the middle box body and the upper box body are arranged at the upper part of the shell and are positioned inside; the air deflector is obliquely arranged between the ash bucket and the upper box body to divide the ash bucket and the upper box body into two cabins. The coal fired boiler flue gas is earlier through ash bucket deceleration, realizes the natural sedimentation of great granule, and finer dust gets into the middle part box and adsorbs on the sack internal surface, and clean air gets into the box to discharge into the atmosphere through fume extractor, because great granule passes through the natural sedimentation of ash bucket in advance, so the sack only need filter tiny granule can, can greatly reduced flue gas processing apparatus's resistance and reduction energy consumption.

Description

Coal fired boiler flue gas processing apparatus

Technical Field

The utility model relates to a high temperature flue gas processing system, especially a handle coal fired boiler flue gas's device.

Background

Coal fired boiler can produce a small amount of high temperature flue gas at the during operation, and coal fired boiler's main flue gas processing apparatus contains: the bag type flue gas treatment device, the electrostatic flue gas treatment device and the wet type flue gas treatment device. The bag-type flue gas treatment device is a device for separating and trapping dust by making dust-containing flue gas pass through a dust-collecting cloth bag, and has the advantages of high dust-collecting efficiency, high dust-collecting efficiency even under low dust-containing concentration, simple operation, reliable operation and the like. However, because the dust removal cloth bag of the existing cloth bag type flue gas treatment device is directly contacted with the waste gas discharged by the coal-fired boiler, no matter the particles with different sizes are filtered by the dust removal cloth bag and then discharged into the atmosphere. Therefore, the cloth bag type flue gas treatment device has the defects of large resistance, high energy consumption and the like.

SUMMERY OF THE UTILITY MODEL

The utility model provides an overcome prior art drawback, provide a coal fired boiler flue gas processing apparatus, in the device, coal fired boiler exhaust waste gas is earlier through the ash bucket deceleration that is located the device bottom, utilizes gravity to realize the nature of great granule and subsides, and more fine dust gets into the middle part box uniformly and adsorbs on the internal surface of sack, and clean air gets into the box after filtering to the atmosphere is discharged through fume extractor, the work load that can effectively reduce the dust removal sack.

The utility model provides a technical scheme that its technical problem adopted is:

a coal-fired boiler flue gas treatment device comprises a shell, an air inlet flow equalizing pipe, a support, an air deflector, an ash bucket, a middle box body, an upper box body and a smoke exhaust device; the flue gas of the coal-fired boiler flows into the shell through the air inlet flow equalizing pipe, the air inlet flow equalizing pipe is connected with the air inlet of the shell, the air outlet at the top of the shell is connected with the smoke exhaust device, and the bottom of the shell is supported on the bracket; the ash bucket is arranged in the cone at the bottom of the shell, and the middle box body and the upper box body are arranged at the upper part of the shell and are positioned in the shell; the air deflector is obliquely arranged between the ash bucket and the upper box body to divide the ash bucket and the upper box body into two cabins.

According to the coal-fired boiler flue gas treatment device, the inclination angle of the air deflector is 10-80 degrees.

According to the coal-fired boiler flue gas treatment device, the number of the air deflectors is not less than two, and the air deflectors are fixedly connected with the shell in an inserting mode through the guide holes in the outer surface of the shell.

According to the coal-fired boiler flue gas treatment device, the air deflector is close to one surface of the ash bucket, fine fluff is fully paved on the surface of the air deflector, and the fluff is made of high-temperature-resistant materials.

In the coal-fired boiler flue gas treatment device, the middle box body is divided into at least two cabins by the cabin dividing baffle, and a dust removal cloth bag is arranged in each cabin; at least four pulse valves are arranged around each cabin bulkhead, and the single cabin pulse valve is independently controlled.

Above-mentioned coal fired boiler flue gas processing apparatus, be equipped with the baffle in the middle of well box and the last box, the corresponding independent cabin position in baffle top is provided with the aspirating hole, install the air exhauster in the middle of the aspirating hole.

The utility model has the advantages that:

the utility model discloses well coal fired boiler exhaust flue gas is earlier through the ash bucket that is located the device bottom, utilizes gravity to realize that great granule subsides naturally, and more fine dust gets into the middle part box uniformly and adsorbs on the internal surface of dust removal sack, and clean air gets into the box through the sack to atmosphere is discharged through fume extractor, because great granule subsides through the nature of ash bucket in advance, so the sack only need filter tiny granule can, can greatly reduced flue gas processing apparatus's resistance and reduction energy consumption.

Drawings

The present invention will be further explained with reference to the accompanying drawings.

FIG. 1 is a schematic sectional view of the structure of the present invention;

FIG. 2 is a schematic cross-sectional view taken along line A-A (the cross-sectional symbol cannot be shown due to the limitation of the drawing size);

FIG. 3 is a schematic axial view of the arrangement inside the housing;

FIG. 4 is a schematic side view of the internal arrangement shaft after rotation;

fig. 5 is a schematic top view of the internal arrangement of the housing.

Description of the drawings: the casing 1 is a closed structure, and to describe the internal structure of the casing 1, the casing 1 is omitted from fig. 3 and 4, and the top sealing plate and half of the surrounding walls are omitted.

In the drawings, the reference numerals denote: 1. a housing; 2. an air inlet flow equalizing pipe; 3. A support; 4. an air deflector; 5. an ash hopper; 6. a middle box body; 7. An upper box body; 8. a fume extractor; 9. a dust removal cloth bag; 10. an exhaust fan; 11. a pulse valve; 13. and (4) an ash discharge valve.

Detailed Description

The present invention will be further described with reference to the following examples.

Referring to fig. 1 to 4, the utility model relates to a coal-fired boiler flue gas treatment device, which comprises a shell 1, an air inlet flow equalizing pipe 2, a bracket 3, an air deflector 4, an ash bucket 5, a middle box body 6, an upper box body 7 and a smoke exhaust device 8; the flue gas of the coal-fired boiler flows into the shell 1 through the air inlet flow equalizing pipe 2, the air inlet flow equalizing pipe 2 is connected with an air inlet of the shell 1, an air outlet at the top of the shell 1 is connected with the smoke exhaust device 8, and the bottom of the shell 1 is supported on the support 3; the shell 1 is of a hollow structure with a cone at the lower part of a cuboid at the upper part, and the cone part structure is of a conical structure with a circular top rectangular bottom and a gradually reduced sectional area. The ash bucket 5 is arranged in a cone at the bottom of the shell 1, and the middle box body 6 and the upper box body 7 are arranged at the upper part of the shell 1 and are positioned in the shell 1; the air guide plate 4 is obliquely arranged between the ash bucket 5 and the upper box body 7, and divides the ash bucket 5 and the upper box body 7 into two cabins. Coal fired boiler flue gas passes through the equal flow tube of air inlet 2 gets into this utility model in, owing to receive aviation baffle 4 effects, and the flue gas direction changes to being located the ash bucket 5 motion of 1 bottom of casing, ash bucket 5 is the circular and sectional area taper structure that diminishes gradually in top rectangle bottom. The flue gas gets into this utility model back because the sudden grow of unit flow area, so the velocity of flow falls slowly fast, and large-scale granule in the flue gas subsides owing to the dead weight produces, and is based on 5 structural feature of ash bucket gather gradually in the ash bucket bottom. The flue gas after the primary sedimentation moves to the middle box body 6 through an ash hopper.

Referring to fig. 1 to 4, the inclination angle of the air deflector 4 is 10-80 degrees, so that the flue gas can be effectively guided to move downwards, and the movement speed of the flue gas is further reduced. The number of the air deflectors 4 is at least two, the air deflectors are fixedly inserted into the shell 1 through guide holes in the outer surface of the shell 1, fine fluff is fully paved on the surfaces of the air deflectors 4 close to one surface of the ash bucket 5, the fluff is made of high-temperature-resistant materials, and the preferred materials are ceramic fiber strips. Particulate matters in the flue gas can be effectively adsorbed, the flue gas treatment rate is further improved, and the air deflector 4 is convenient to disassemble, clean and replace. In order to ensure the sealing performance of the device, a high-temperature-resistant sealing strip is arranged on the contact surface of the air deflector 4 and the shell 1, and the preferred material is a ceramic fiber strip. The ceramic fiber strip is a high-temperature-resistant sealing material, is commonly used for sealing between a fireproof door and a steel surrounding wall in ocean engineering, has high-temperature resistance, and can still maintain the sealing performance when the environmental working temperature reaches 800 ℃ and the limit temperature is 2000 ℃.

Referring to fig. 3 to 5, the middle box body 6 is divided into at least two compartments by the compartment dividing baffle, and a dust removing cloth bag 9 is arranged in each compartment; the middle box body 6 and the upper box body 7 are provided with baffle plates in the middle, the corresponding independent cabin position at the top of each baffle plate is provided with an air exhaust hole, and an exhaust fan 10 is installed in the middle of each air exhaust hole. Referring to fig. 2, the flue gas after the preliminary sedimentation moves to a cloth bag 9 in the middle box body 6 through an ash bucket 5, under the action of the exhaust fan 10, negative pressure is formed inside the middle box body 6, the flue gas is forced to enter the middle box body 6 after being filtered by the cloth bag 9, and clean flue gas moves to the upper box body 7 through the middle box body 6 and is discharged through the smoke discharge device 8.

Referring to fig. 3 to 5, at least four pulse valves 11 are arranged around each cabin wall, and the pulse valves 11 are individually controlled in a single cabin. Along with the progress of the filtering working condition, the more the dust on the cloth bag 9 is accumulated, when the equipment resistance reaches a limited resistance value, the ash removal device automatically closes one chamber of the exhaust fan 10 according to a differential pressure set value, then opens the pulse valve 11 according to a set program to stop air blowing, and the dust on the cloth bag 9 is shaken off to an ash bucket by utilizing the pressure distance in the compressed air instantly blowing filter bag. Referring to fig. 1 and 2, the dust discharge valve 13 is opened, and dust accumulated at the bottom of the dust hopper 5 is discharged through the dust discharge valve 13.

Claims

1. A coal fired boiler flue gas processing apparatus, characterized by: the device comprises a shell (1), an air inlet flow equalizing pipe (2), a support (3), an air deflector (4), an ash bucket (5), a middle box body (6), an upper box body (7) and a smoke exhaust device (8); the flue gas of the coal-fired boiler flows into the shell (1) through the air inlet flow equalizing pipe (2), the air inlet flow equalizing pipe (2) is connected with an air inlet of the shell (1), an air outlet at the top of the shell (1) is connected with the smoke exhaust device (8), and the bottom of the shell (1) is supported on the support (3); the ash bucket (5) is arranged in a cone at the bottom of the shell (1), and the middle box body (6) and the upper box body (7) are arranged at the upper part of the shell (1) and are positioned in the shell (1); the air deflector (4) is obliquely arranged between the ash bucket (5) and the upper box body (7) to divide the ash bucket (5) and the upper box body (7) into two cabins.

2. The coal-fired boiler flue gas treatment device according to claim 1, characterized in that: the inclination angle of the air deflector (4) is 10-80 degrees.

3. The coal-fired boiler flue gas treatment device according to claim 2, characterized in that: the number of the air deflectors (4) is not less than two, and the air deflectors are fixedly connected with the shell (1) in an inserting mode through guide holes in the outer surface of the shell (1).

4. The coal-fired boiler flue gas treatment device according to claim 3, characterized in that: the air deflector (4) is close to one surface of the ash bucket (5), fine fluff is fully paved on the surface of the air deflector, and the fluff is made of high-temperature resistant materials.

5. The coal-fired boiler flue gas treatment device according to claim 4, characterized in that: the middle box body (6) is divided into at least two cabins by the compartment baffle, and a dust removal cloth bag (9) is arranged in each cabin; at least four pulse valves (11) are arranged around the wall of each cabin, and the pulse valves (11) of a single cabin are independently controlled.

6. The coal-fired boiler flue gas treatment device according to claim 5, characterized in that: the middle box body (6) and the upper box body (7) are provided with baffle plates in the middle, air exhaust holes are formed in the positions of the corresponding independent cabins at the tops of the baffle plates, and an exhaust fan (10) is installed in the middle of the air exhaust holes.