CN211677179U

CN211677179U - Flue gas denitration device

Info

Publication number: CN211677179U
Application number: CN201922412462.5U
Authority: CN
Inventors: 许玉明; 王建学; 王金龙; 杨玉龙
Original assignee: Hebei Xinda Iron and Steel Group Co Ltd
Current assignee: Hebei Xinda Iron and Steel Group Co Ltd
Priority date: 2019-12-29
Filing date: 2019-12-29
Publication date: 2020-10-16
Anticipated expiration: 2029-12-29

Abstract

The utility model relates to a flue gas purification technical field, especially a flue gas denitration device with jetting function. The device comprises an SCR denitration reactor and an injection mechanism, wherein the injection mechanism comprises an injection pipe, a compressed air pump, a flow dividing pipe, a metal connecting hose and a connecting sleeve; the connecting sleeve penetrates through and is fixed to an SCR denitration reactor surrounding wall, the injection pipe penetrates through the connecting sleeve and is communicated with the SCR denitration reactor, the injection pipe comprises longitudinal pipes and transverse pipes, the longitudinal pipes and the transverse pipes are vertically installed, the number of the transverse pipes is 1-10, and 1-20 injection holes are formed in the bottom of the transverse pipe of the injection pipe; the compressed air pump is connected with the shunt tube through a pipeline, and the shunt tube is communicated with the injection tube through a metal connecting hose; the metal connecting hose is respectively connected with the blowing pipe and the shunt pipe through flanges. The principle of blowing air is utilized to discharge dust on the surface of the catalyst along with air through an exhaust pipeline, so that the effect of evolving the catalyst is achieved, and the effects of ensuring stable catalytic effect and continuous production are achieved.

Description

Flue gas denitration device

Technical Field

The utility model relates to a flue gas purification technical field, especially a flue gas denitration device with jetting function.

Background

The importance of the process of removing nitrogen oxides from combustion flue gas, i.e., flue gas denitration, to prevent environmental pollution has been pointed out as a worldwide problem. The mainstream process in the world comprises the following steps: SCR and SNCR. These two processes are not very different except that the reaction temperature is lower than the SNCR due to the use of a catalyst for SCR.

For the honeycomb catalyst of the SCR denitration reactor, the honeycomb catalyst is easy to be stuck and blocked, the existing prevention and control technology is that the reactor is provided with an acoustic wave ash remover mostly, but the acoustic wave ash remover cannot meet the requirement of cleaning surface dust, and the requirement of stable catalytic effect and continuous production cannot be ensured.

SUMMERY OF THE UTILITY MODEL

The utility model provides an overcome prior art drawback, provide a flue gas denitrification facility, denitrification facility is equipped with the removal jetting pipe, can high-efficient clear cleaning point catalyst surface dust.

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

a flue gas denitration device comprises an SCR denitration reactor and an injection mechanism, wherein the injection mechanism comprises an injection pipe, a compressed air pump, a flow dividing pipe, a metal connecting hose and a connecting sleeve; the connecting sleeve penetrates through the surrounding wall of the SCR denitration reactor and is fixed, and the injection pipe penetrates through the connecting sleeve and is communicated with the SCR denitration reactor; the blowing pipe comprises longitudinal pipes and transverse pipes, the longitudinal pipes and the transverse pipes are vertically installed, the number of the transverse pipes is 1-10, 1-20 blowing holes are formed in the bottom of each transverse pipe of the blowing pipe, the distance between each blowing hole and a honeycomb catalyst is 30-50mm, the distance between each blowing hole and the honeycomb catalyst is 40-60 mm, and the honeycomb catalyst is located at the bottom of the SCR denitration reactor; the compressed air pump is connected with a shunt tube through a pipeline, and the shunt tube is communicated with the injection tube through the metal connecting hose; the metal connecting hose is respectively connected with the blowing pipe and the shunt pipe through flanges.

In the flue gas denitration device, the blowing mechanism is additionally provided with the power mechanism, and the power mechanism comprises a speed reduction motor, a first roller, a second roller, a fixing column and a steel wire rope; the fixing column is fixed on the outer wall of the blowing pipe, the speed reducing motor, the first idler wheel, the second idler wheel and the fixing column are connected into a whole through the steel wire rope, and two ends of the steel wire rope are fixedly tied on the fixing column.

According to the flue gas denitration device, the power mechanism is additionally provided with the first limit switch and the second limit switch, the first limit switch is installed on one side of the SCR denitration reactor, and the second limit switch is installed on one side of the speed reduction motor.

The utility model has the advantages that:

the utility model discloses in contain SCR denitration reactor and jetting mechanism, jetting mechanism contains jetting pipe, compressed air pump, shunt tubes, metal connecting hose and adapter sleeve. Compressed air pump does the utility model provides a compressed air, through shunt tubes, metal connecting hose compressed air get into the jetting pipe, compressed air blow to through the jetting aperture of seting up on the jetting pipe the honeycomb catalyst of SCR denitration reactor bottom makes catalyst surface dust is discharged via exhaust duct along with the air, reaches the evolution the effect of catalyst has reached and has guaranteed that catalytic effect is stable, continuous production's effect.

Drawings

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

Fig. 1 is a schematic top view of the present invention;

fig. 2 is a schematic diagram of a power mechanism.

In the drawings, the reference numerals denote: 1. An SCR denitration reactor; 2. a blowing pipe; 2-1, blowing holes; 3. a compressed air pump; 4. a shunt tube; 5. a metal connection hose; 6. a connecting sleeve; 7. a reduction motor; 8. a first roller; 9. a second roller; 10. fixing a column; 11. a wire rope; 12. a first limit switch; 13. a second limit switch; 14. a valve; 15. a honeycomb catalyst; 16. and a support member.

Detailed Description

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

Referring to fig. 1, the utility model relates to a flue gas denitration device, which comprises an SCR denitration reactor 1 and a blowing mechanism, wherein the blowing mechanism comprises a blowing pipe 2, a compressed air pump 3, a shunt pipe 4, a metal connecting hose 5 and a connecting sleeve 6; connecting sleeve 6 passes 1 leg of SCR denitration reactor is fixed, for injection pipe 2 provides the passageway and the spacing of removal, injection pipe 2 passes connecting sleeve 6 with 1 UNICOM of SCR denitration reactor, because the utility model discloses it is not high to the gas tightness requirement, so connecting sleeve 6 need not to do special airtight processing, only need connecting sleeve 6 inner wall coating butter can, the butter is used for sealed also as the lubrication. Since the device only needs to be operated for less than 10 minutes per 24 hours, the design of the connecting sleeve 6 is sufficient for the application.

Referring to fig. 1, the blowing pipe 2 comprises longitudinal pipes and transverse pipes, the longitudinal pipes and the transverse pipes are vertically installed, the number of the transverse pipes is 1-10, 1-20 blowing holes 2-1 are formed in the bottom of the transverse pipe of the blowing pipe 2 and used for blowing air to a honeycomb-shaped catalyst at the bottom of the SCR denitration reactor 1, the honeycomb-shaped catalyst is arranged at the bottom of the SCR denitration reactor 1 and then used for cleaning the surface of the catalyst, the catalytic effect is optimized, the distance between the blowing holes 2-1 is 30-50mm, the preferred distance is 35mm, 40mm or 45mm, the distance between the blowing holes 2-1 and the honeycomb-shaped catalyst 15 is 40 mm-60mm, and the preferred distance is 45mm, 50mm or 55 mm. The compressed air pump 3 is a compressed air source provided by the utility model, the compressed air pump 3 is connected with the shunt tube 4 through a pipeline, and the shunt tube 4 is communicated with the injection tube 2 through the metal connecting hose 5; the metal connecting hose 5 is respectively connected with the blowing pipe 2 and the shunt pipe 4 through flanges, so that the whole blowing mechanism is connected into a communicated whole. A valve 14 is arranged at the joint of the shunt pipe 4 and the metal connecting hose 5 and used for controlling the opening and closing of the shunt opening and further controlling whether the corresponding injection pipe 2 is started or not.

Referring to fig. 1 and 2, a power mechanism is additionally arranged on the blowing mechanism, and the power mechanism comprises a speed reduction motor 7, a first roller 8, a second roller 9, a fixed column 10 and a steel wire rope 11; the fixing column 10 is fixed on the outer wall of the blowing pipe 2, the speed reducing motor 7, the first roller 8, the second roller 9 and the fixing column 10 are connected into a whole through the steel wire rope 11, and two ends of the steel wire rope are fastened on the fixing column 10; the speed reducing motor 7 is powered by a motor. Therefore, the worker can drive the speed reduction motor 7 to rotate forwards and backwards through the forward rotation and the reverse rotation of the operation motor, then control the steel wire rope 11 to move, and then control the injection pipe 2 to move towards the inside of the SCR denitration reactor 1 or move towards the outside of the SCR denitration reactor 1. Because the blowing pipe 2 is a movable part, the blowing pipe 2 and the shunt pipe 4 are connected through the metal connecting hose 5, so that the stroke requirement of the blowing pipe 2 is met.

Referring to fig. 2, the power mechanism is additionally provided with a first limit switch 12 and a second limit switch 13, the first limit switch 12 is installed on one side of the SCR denitration reactor 1, and the second limit switch 13 is installed on one side of the speed reduction motor 7. When the fixed column 10 moves to the first limit switch 12 along with the blowing pipe 2, the first limit switch 12 is triggered, the circuit is disconnected, and the blowing pipe 2 stops moving forwards; when the fixed column 10 moves to the second limit switch 13 along with the blowing pipe 2 in the reverse direction, the second limit switch 13 is triggered, the circuit is disconnected, and the blowing pipe 2 stops moving backwards; effectively limit the stroke of the blowing pipe 2 and prevent other devices from being arranged.

With reference to fig. 1, the blowing tube 2 is provided with a support 16 below the cross tube to prevent the cross tube from sagging and thereby affecting the blowing effect.

Claims

1. The utility model provides a flue gas denitrification facility, contains SCR denitration reactor (1) and jetting mechanism, characterized by: the blowing mechanism comprises a blowing pipe (2), a compressed air pump (3), a shunt pipe (4), a metal connecting hose (5) and a connecting sleeve (6); the connecting sleeve (6) penetrates through the surrounding wall of the SCR denitration reactor (1) and is fixed, and the injection pipe (2) penetrates through the connecting sleeve (6) and is communicated with the SCR denitration reactor (1); the blowing pipe (2) comprises longitudinal pipes and transverse pipes, the longitudinal pipes and the transverse pipes are vertically installed, the number of the transverse pipes is 1-10, 1-20 blowing holes (2-1) are formed in the bottom of the transverse pipe of the blowing pipe (2), the distance between every two blowing holes (2-1) is 30-50mm, the distance between every two blowing holes (2-1) and a honeycomb catalyst (15) is 40-60 mm, and the honeycomb catalyst (15) is located at the bottom of the SCR denitration reactor (1); the compressed air pump (3) is connected with the shunt pipe (4) through a pipeline, and the shunt pipe (4) is communicated with the injection pipe (2) through the metal connecting hose (5); the metal connecting hose (5) is respectively connected with the injection pipe (2) and the shunt pipe (4) through flanges.

2. The flue gas denitration apparatus according to claim 1, wherein: the blowing mechanism is additionally provided with a power mechanism, and the power mechanism comprises a speed reducing motor (7), a first roller (8), a second roller (9), a fixed column (10) and a steel wire rope (11); the fixing column (10) is fixed on the outer wall of the blowing pipe (2), the speed reducing motor (7), the first roller (8), the second roller (9) and the fixing column (10) are connected into a whole through the steel wire rope (11), and two ends of the steel wire rope are fastened on the fixing column (10).

3. The flue gas denitration apparatus according to claim 2, wherein: the power mechanism is additionally provided with a first limit switch (12) and a second limit switch (13), the first limit switch (12) is installed on one side of the SCR denitration reactor (1), and the second limit switch (13) is installed on one side of the speed reduction motor (7).