CN215539633U - Carbon deposit prevention device for ammonia spraying section of activated carbon desulfurization and denitrification system - Google Patents
Carbon deposit prevention device for ammonia spraying section of activated carbon desulfurization and denitrification system Download PDFInfo
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- CN215539633U CN215539633U CN202121937162.XU CN202121937162U CN215539633U CN 215539633 U CN215539633 U CN 215539633U CN 202121937162 U CN202121937162 U CN 202121937162U CN 215539633 U CN215539633 U CN 215539633U
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Abstract
The utility model discloses an ammonia spraying section carbon deposit prevention device of an active carbon desulfurization and denitrification system, which belongs to the technical field of flue gas desulfurization and denitrification in the steel industry and comprises a screen, a hanging cross rod and a hook, wherein the hanging cross rod is arranged in an ammonia spraying section dead zone close to one side of a flue port, and the height of the hanging cross rod is lower than the length of the flue port; the top of screen cloth is passed through the couple and can dismantle with hanging the horizontal pole and be connected, and the top of desulfurization section is stretched into to the bottom, evenly be equipped with the sieve mesh on the screen cloth, the size of sieve mesh is directly proportional with the particle size of active carbon. The utility model can effectively prevent the problem of carbon accumulation in the ammonia spraying section dead zone of the activated carbon desulfurization and denitrification system, reduce the labor intensity during maintenance, improve the system stability and prolong the maintenance period.
Description
Technical Field
The utility model belongs to the technical field of flue gas desulfurization and denitration in the steel industry, and particularly relates to a carbon deposition prevention device for an ammonia spraying section of an activated carbon desulfurization and denitration system.
Background
Along with the stricter environmental protection policy in recent years, the desulfurization and denitrification process of the activated carbon is more and more applied to the steel industry due to the excellent flue gas purification function of the activated carbon. Although the flue gas purification effect of the process can meet the requirement of ultralow emission and basically no secondary pollutant is discharged, the active carbon desulfurization and denitrification process still has a plurality of problems in actual operation, and brings trouble to long-term stable operation of a system, and among the problems, the problem of carbon deposition in an ammonia spraying section is common.
Most of the current activated carbon desulfurization and denitrification processes are of a counter-flow type, namely, activated carbon moves from top to bottom and flue gas moves from bottom to top, and a system mainly comprises a desulfurization section, an ammonia spraying section and a denitrification section from bottom to top. The ammonia spraying section is a dead zone according to the original design and is only used as a mixed area of flue gas and ammonia water, but a large amount of active carbon can appear in the ammonia spraying section after the ammonia spraying section operates for a period of time, so that the flue gas desulfurization and denitrification efficiency is reduced due to the increase of the pressure difference of the system. The analysis reason is that the active carbon of the desulfurization layer can be blown up by the flue gas to enter the empty area of the ammonia spraying section along with the fluctuation of the pressure difference. When a set of system with the most serious carbon deposit is treated, the time is shared for one week from front to back, and dozens of tons of activated carbon are cleaned manually. At present, the deposited carbon at the ammonia spraying section is mainly treated by manpower, the working environment is severe, the labor intensity is high, and each production line (sintering, pelletizing and coking) must be stopped during the treatment period due to the requirement of an environmental protection policy, so that great influence is brought to the production of enterprises and the health of workers. Therefore, the ammonia spraying section carbon deposition becomes the problem to be solved urgently in the activated carbon desulfurization and denitrification system.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved is as follows: aiming at the technical problems, the utility model provides a carbon deposition prevention device for an ammonia spraying section of an active carbon desulfurization and denitrification system, which can effectively prevent the carbon deposition phenomenon of the ammonia spraying section.
The technical scheme is as follows: the carbon deposition prevention device for the ammonia spraying section of the activated carbon desulfurization and denitrification system comprises a screen, a hanging cross rod and a hook, wherein the hanging cross rod is arranged in an ammonia spraying section dead zone close to one side of a flue opening, and the height of the hanging cross rod is lower than the length of the flue opening; the top of screen cloth is passed through the couple and can dismantle with hanging the horizontal pole and be connected, and the top of desulfurization section is stretched into to the bottom, evenly be equipped with the sieve mesh on the screen cloth, the size of sieve mesh is directly proportional with the particle size of active carbon.
Preferably, the height of the hanging cross rod is 0.5-0.6 times of the length of the flue opening.
Preferably, the material of the screen is stainless steel.
Preferably, the height of the screen is 70-90 cm.
Preferably, the width of the screen is 45-55 cm.
Preferably, the shape of the sieve holes is rectangular.
Preferably, the area of the sieve holes is 40-60 cm2。
Has the advantages that: the utility model can effectively prevent the problem of carbon accumulation in the ammonia spraying section dead zone of the activated carbon desulfurization and denitrification system, reduce the labor intensity during maintenance, improve the system stability and prolong the maintenance period.
Through setting up suitable sieve mesh size, both can prevent that the too big active carbon that leads to of sieve mesh from getting into and spout ammonia section dead zone, can prevent again that the sieve mesh undersize from leading to the ammonium salt crystallization, the flue gas risees through the pressure difference that is hindered.
By setting the proper size of the screen, the screen can be prevented from being too large and incapable of flexibly rotating in a limited space, so that access of maintainers is prevented; but also can prevent the screen mesh from being too small and the active carbon from entering the empty area of the ammonia spraying section.
By setting an appropriate screen height based on the size of the flue gas volume: the larger the flue gas amount is, the higher the screen height is, and the active carbon can be efficiently prevented from entering an ammonia spraying section dead zone.
Through selecting suitable screen cloth material for use, can effectively resist flue gas corrosion and dust and erode, improve the life of device.
Through the detachable connection mode of the hook, the screen can be replaced or the damaged screen can be replaced in time according to the size of the screen hole.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the installation position of the present invention;
the numerical references in the figures represent the following meanings: 1. the device comprises a screen, 2. a hanging cross bar, 3. a hook, 4. a desulfurization section, 5. an ammonia spraying section dead zone, 6. a denitration section and 7. a flue opening.
Detailed Description
The utility model is further described with reference to the following figures and specific examples.
Example 1
As shown in fig. 1 and 2, the carbon deposition prevention device for the ammonia spraying section of the activated carbon desulfurization and denitrification system comprises a screen mesh 1, a hanging cross rod 2 and a hook 3. The hanging cross bar 2 is fixedly arranged at the ammonia spraying section dead zone 5 close to one side of the flue opening 7, the height of the hanging cross bar is lower than the length of the flue opening 7 (the length of the flue opening 7 is 1.5m in the embodiment), and the height is specifically set to be 0.75 m; the screen mesh 1 is made of stainless steel, so that the flue gas corrosion and dust scouring can be effectively resisted; the top end of the screen mesh is detachably connected with the hanging cross bar 2 through the hook 3, and the screen mesh 1 can be ensured to rotate to the upper part from one side close to the flue opening 7 by matching with the height of the hanging cross bar 2, so that manual entry is facilitated during maintenance; the bottom stretches into the top of desulfurization section 4, and the degree of depth of stretching into is 5cm, can effectively resist the blowing power of flue gas to screen cloth 1, fixed screen cloth 1. The height of the screen was 70cm and the width was 45 cm. The screen mesh 1 is uniformly provided with screen holes, the size of the screen holes is in direct proportion to the particle size of the active carbon, and the screen mesh is packagedAt the initial stage of putting into operation, the active carbon particles are larger, and the size of the area of the sieve pores can be controlled to be larger so as to reduce the pressure drop of the flue gas; along with the prolonging of the operation time, the active carbon particles are smaller and smaller, and the corresponding mesh area size also needs to be gradually reduced so as to effectively prevent the active carbon from passing through. The specific sieve pore shape can be set as rectangle, and the area is set as 40 cm2、45 cm2、50 cm2And 60cm2This is achieved by replacing the screen mesh 1 when the mesh size needs to be reduced.
Example 2
As shown in fig. 1 and 2, the carbon deposition prevention device for the ammonia spraying section of the activated carbon desulfurization and denitrification system comprises a screen mesh 1, a hanging cross rod 2 and a hook 3. The hanging cross bar 2 is fixedly arranged at the ammonia spraying section dead zone 5 close to one side of the flue opening 7, the height of the hanging cross bar is lower than the length of the flue opening 7 (the length of the flue opening 7 is 1.5m in the embodiment), and the height is specifically set to be 0.9 m; the screen mesh 1 is made of stainless steel, so that the flue gas corrosion and dust scouring can be effectively resisted; the top end of the screen mesh is detachably connected with the hanging cross bar 2 through the hook 3, and the screen mesh 1 can be ensured to rotate to the upper part from one side close to the flue opening 7 by matching with the height of the hanging cross bar 2, so that manual entry is facilitated during maintenance; the bottom stretches into the top of desulfurization section 4, and the degree of depth of stretching into is 10cm, can effectively resist the blowing power of flue gas to screen cloth 1, fixed screen cloth 1. Because the flue gas volume that rises to denitration section 6 by desulfurization section 4 in this embodiment is great, the height that sets up the screen cloth is 90cm, and the width is 55 cm. The screen mesh 1 is uniformly provided with screen holes, the size of each screen hole is in direct proportion to the particle size of the activated carbon, the activated carbon particles are larger in the initial stage of the device operation, and the area size of each screen hole can be controlled to be larger so as to reduce the pressure drop of the flue gas; along with the prolonging of the operation time, the active carbon particles are smaller and smaller, and the corresponding mesh area size also needs to be gradually reduced so as to effectively prevent the active carbon from passing through. The specific sieve pore shape can be set as rectangle, and the area is set as 40 cm2、45 cm2、50 cm2And 60cm2This is achieved by replacing the screen mesh 1 when the mesh size needs to be reduced.
Claims (7)
1. The carbon deposition prevention device for the ammonia spraying section of the activated carbon desulfurization and denitrification system is characterized by comprising a screen (1), a hanging cross rod (2) and a hook (3), wherein the hanging cross rod (2) is arranged in an ammonia spraying section dead zone (5) close to one side of a flue opening (7), and the height of the hanging cross rod is lower than the length of the flue opening (7); the top of screen cloth (1) is passed through couple (3) and can dismantle with hanging horizontal pole (2) and be connected, and the top of desulfurization section (4) is stretched into to the bottom, evenly be equipped with the sieve mesh on screen cloth (1), the size of sieve mesh is directly proportional with the particle size of active carbon.
2. The carbon deposition prevention device of the ammonia spraying section of the activated carbon desulfurization and denitrification system according to claim 1, wherein the height of the suspension cross rod (2) is 0.5-0.6 times of the length of the flue opening (7).
3. The carbon deposition prevention device of the ammonia spraying section of the activated carbon desulfurization and denitrification system according to claim 1, wherein the screen (1) is made of stainless steel.
4. The carbon deposition prevention device for the ammonia spraying section of the activated carbon desulfurization and denitrification system according to claim 1, wherein the height of the screen (1) is 70-90 cm.
5. The carbon deposition prevention device for the ammonia spraying section of the activated carbon desulfurization and denitrification system according to claim 1, wherein the width of the screen (1) is 45-55 cm.
6. The carbon deposition prevention device of the ammonia injection section of the activated carbon desulfurization and denitrification system as claimed in claim 1, wherein the sieve holes are rectangular in shape.
7. The carbon deposit prevention device for the ammonia spraying section of the activated carbon desulfurization and denitrification system as claimed in claim 1, wherein the area of the sieve holes is 40-60 cm2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121937162.XU CN215539633U (en) | 2021-08-18 | 2021-08-18 | Carbon deposit prevention device for ammonia spraying section of activated carbon desulfurization and denitrification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121937162.XU CN215539633U (en) | 2021-08-18 | 2021-08-18 | Carbon deposit prevention device for ammonia spraying section of activated carbon desulfurization and denitrification system |
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| Publication Number | Publication Date |
|---|---|
| CN215539633U true CN215539633U (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121937162.XU Active CN215539633U (en) | 2021-08-18 | 2021-08-18 | Carbon deposit prevention device for ammonia spraying section of activated carbon desulfurization and denitrification system |
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| CN (1) | CN215539633U (en) |
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2021
- 2021-08-18 CN CN202121937162.XU patent/CN215539633U/en active Active
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