CN213480267U - Cement denitration buggy distributor - Google Patents
Cement denitration buggy distributor Download PDFInfo
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- CN213480267U CN213480267U CN202022241796.3U CN202022241796U CN213480267U CN 213480267 U CN213480267 U CN 213480267U CN 202022241796 U CN202022241796 U CN 202022241796U CN 213480267 U CN213480267 U CN 213480267U
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Abstract
The utility model discloses a cement denitration buggy distributor, including sending the coal trunk line, send the coal trunk line to link to each other with first buggy distributor, first buggy distributor respectively with second buggy distributor, third buggy distributor links to each other, second buggy distributor respectively with first combustor, the second combustor, the third combustor links to each other, third buggy distributor respectively with the fourth combustor, the fifth combustor, the sixth combustor links to each other, first combustor, the second combustor, the fourth combustor, the fifth combustor sets up respectively on the cone of dore, the third combustor, the sixth combustor sets up respectively on the cylinder of dore. The utility model discloses the reduction of buggy distributor quantity has reduced buggy pipeline's resistance, and balanced each buggy pipeline resistance keeps sending the stability of coal, reduces the probability of buggy deflagration in the decomposition furnace, guarantees to burn till the operation of system and stabilize.
Description
Technical Field
The utility model belongs to distributor specifically is a cement denitration buggy distributor.
Background
With the national emphasis and the enhancement of public environmental awareness, the emission requirements of the cement industry are more and more strict. To reduce NOxThe discharge of the coal dust distributor is characterized in that denitration technical transformation is carried out in each cement enterprise, one of the technological transformation is classified combustion technological transformation, namely a kiln tail coal dust pipeline is changed from one to two into one to six, four coal dust distributors are added on the basis of an original coal dust conveying pipeline and a first coal dust distributor, and coal dust is divided into one to six, wherein a coal dust pipeline behind a third coal dust distributor is divided into two to two newly-added coal dust distributors, the coal dust pipeline continues to be divided into four and is connected to a cone of a decomposing furnace, and a coal dust pipeline behind a second coal dust distributor is divided into two and is connected to a cylinder of the decomposing furnace. During normal production, 100% of the kiln tail coal powder is uniformly distributed to the four burners through the third coal powder distributor. The cone of the decomposing furnace can locally generate crusts under the influence of changes of raw materials, fuels and harmful components in the raw materials, the crusts can be temporarily closed to one of the four corresponding combustors at the crusts, one combustor of the decomposing furnace cylinder behind the second pulverized coal distributor is opened, and the original system is switched back after the crusts are cleaned.
The coal powder distribution system reformed by the method has the following defects:
(1) the method is characterized in that the crusting is generated around a certain combustor at the cone of the decomposing furnace, the combustor is closed, after the combustor connected with a decomposing furnace cylinder is opened, the coal powder amount in an inlet pipeline of a coal powder distributor connected with the crusting combustor is reduced, under the condition that the pipe diameter is not changed, the wind speed is reduced, the coal feeding amount of another coal feeding branch pipeline of the coal powder distributor connected with the crusting combustor is unstable, the coal powder deflagration in the decomposing furnace is caused, and the stable operation of a burning system is seriously influenced.
(2) Because the valve and the pulverized coal distributor are added, the resistance of the pulverized coal conveying pipeline is correspondingly increased, the energy consumption of the system is increased, and the equipment cost is also increased;
(3) due to the addition of the pulverized coal distributor, the pulverized coal pipeline is complex, the pipeline arrangement in a narrow space at the tail of the kiln is increased, and the construction difficulty is increased.
(4) The equipment layout is dispersed, the overhaul and the maintenance are not easy, and the inspection workload is increased.
SUMMERY OF THE UTILITY MODEL
The purpose of the invention is as follows: in order to overcome the not enough of existence among the prior art, the utility model aims at providing a can realize freely switching of each combustor, balanced each send the coal to divide the resistance of pipeline, keep sending the stability of coal, reduce the probability of buggy detonation in the decomposition furnace, guarantee to burn cement denitration buggy distributor of system steady operation.
The technical scheme is as follows: a cement denitration buggy distributor, including sending the coal trunk line, send the coal trunk line to link to each other with first buggy distributor, first buggy distributor respectively with second buggy distributor, third buggy distributor links to each other, second buggy distributor respectively with first combustor, the second combustor, the third combustor links to each other, third buggy distributor respectively with the fourth combustor, the fifth combustor, the sixth combustor links to each other, first combustor, the second combustor, the fourth combustor, the fifth combustor sets up respectively on the cone of dore furnace, the third combustor, the sixth combustor sets up respectively on the cylinder of dore furnace.
The cylinder of the decomposing furnace is connected with a tertiary air pipe. The third burner and the sixth burner are arranged at the upper part of the tertiary air pipe. When the cone of the decomposing furnace is skinned, the pulverized coal can be switched to the upper part of the tertiary air for burning, the space of the area is large, the powder absorbs heat for decomposition, the temperature is lower than that of the cone of the decomposing furnace, and skinning is not easy to happen.
The first coal powder distributor comprises an inlet and two outlets, and the pipe diameters of the outlets are the same. The second coal powder distributor comprises an inlet and three outlets, and the pipe diameters of the outlets are the same. The third coal powder distributor comprises an inlet and three outlets, and the pipe diameters of the outlets are the same. And valves are arranged on the pipelines connected with the outlets of the second coal powder distributor and the third coal powder distributor and are used for controlling the start and stop of the burner.
The working principle is as follows: the kiln tail coal powder is uniformly divided into two paths by the first coal powder distributor, the coal powder amount of the second coal powder distributor accounts for 50% of the total amount of the kiln tail coal powder, and the coal powder amount of the third coal powder distributor accounts for 50% of the total amount of the kiln tail coal powder. The coal powder of the second coal powder distributor is divided into two paths to enter a cone of the decomposing furnace, and the coal powder amount of the second coal powder distributor is 50 percent of that of the second coal powder distributor. The coal powder of the third coal powder distributor is divided into two paths to enter a cone of the decomposing furnace, and the coal powder amount of the third coal powder distributor is 50 percent of that of the third coal powder distributor. When the cone of the decomposing furnace is partially skinned, one of the first combustor, the second combustor, the fourth combustor and the fifth combustor corresponding to the skinning position is temporarily closed, the third combustor or the sixth combustor is opened, and after the skinning is cleaned, the system is switched back to the original system again. In the process of switching the pulverized coal pipelines, the coal conveying amount of the first coal conveying branch pipeline or the second coal conveying branch pipeline is not changed, the stability of coal conveying is kept, the resistance of the pipeline is unchanged, the probability of pulverized coal deflagration in the decomposing furnace is reduced, and the stable operation of a firing system is ensured.
Has the advantages that: compared with the prior art, the utility model, have following characteristics:
1. the reduction of the number of the coal powder distributors reduces the resistance of a coal powder conveying pipeline, balances the resistance of each coal powder pipeline, keeps the stability of coal conveying, reduces the probability of deflagration of coal powder in a decomposing furnace, and ensures the stable operation of a firing system;
2. the coal feeding wind speed in all main paths and branch paths of the pulverized coal pipeline can be controlled to be stable, and the coal feeding is not unstable or resistance is increased due to the change of the wind speed caused by the stop of a certain pipeline, so that the calcining working condition in the decomposing furnace is not influenced;
3. the arrangement of the pulverized coal pipelines is simplified, the pulverized coal pipelines are less influenced by floors and spaces, the modification of different furnace types is easy, and the construction is simple and convenient;
4. the denitration coal powder can be divided into six paths by adopting the two one-to-three coal powder distributors to replace the original four one-to-two distributors, so that the number of the coal powder distributors and valves is reduced, the process flow is optimized, the operation control of the system is simplified, and the effects of cost reduction and efficiency improvement can be achieved;
5. the equipment layout is concentrated, the control is convenient, the overhaul and the maintenance are easy, and the inspection workload is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The directions shown in the specification are up, down, left and right.
Referring to fig. 1, a main coal feeding pipe 1 of a kiln tail coal feeding system is connected with a first pulverized coal distributor 2 and is uniformly divided into two symmetrical paths, wherein one path is connected with a second pulverized coal distributor 3 through a first coal feeding branch pipe 13, and the other path is connected with a third pulverized coal distributor 4 through a second coal feeding branch pipe 14. The outlet of the second coal powder distributor 3 is respectively connected with a first valve 15, a second valve 16 and a third valve 17, is divided into three paths, and is respectively connected with the first combustor 5, the second combustor 6 and the third combustor 7 through a first coal feeding branch pipeline 18, a second coal feeding branch pipeline 19 and a third coal feeding branch pipeline 20. The outlet of the third coal powder distributor 4 is respectively connected with a fourth valve 21, a fifth valve 22 and a sixth valve 23, is divided into three paths, and is respectively connected with a fourth burner 8, a fifth burner 9 and a sixth burner 10 through a fourth coal feeding branch pipeline 24, a fifth coal feeding branch pipeline 25 and a sixth coal feeding branch pipeline 26. The first burner 5, the second burner 6, the fourth burner 8 and the fifth burner 9 are positioned at the lower part of the cone of the decomposing furnace 11, the third burner 7 and the sixth burner 10 are positioned at the lower part of the column of the decomposing furnace 11 and at the upper part of the tertiary air duct 12, the third burner 7 and the sixth burner 10 are symmetrically arranged about the decomposing furnace 11, and the tertiary air duct 12 is connected with the lower part of the column of the decomposing furnace 11. The first burner 5, the second burner 6, the fourth burner 8 and the fifth burner 9 are uniformly distributed along the circumference direction of the lower part of the cone of the decomposing furnace 11, and only one layer is formed. The cone of the decomposing furnace 11 is connected to a smoke chamber 27, and the smoke chamber 27 is connected to a rotary kiln 28.
Claims (7)
1. The utility model provides a cement denitration buggy distributor which characterized in that: including sending coal trunk line (1), send coal trunk line (1) to link to each other with first buggy distributor (2), first buggy distributor (2) links to each other with second buggy distributor (3), third buggy distributor (4) respectively, second buggy distributor (3) links to each other with first combustor (5), second combustor (6), third combustor (7) respectively, third buggy distributor (4) links to each other with fourth combustor (8), fifth combustor (9), sixth combustor (10) respectively, first combustor (5), second combustor (6), fourth combustor (8), fifth combustor (9) set up respectively on the cone of dore furnace (11), third combustor (7), sixth combustor (10) set up respectively on the cylinder of dore furnace (11).
2. The cement denitration pulverized coal distribution device according to claim 1, characterized in that: and the cylinder of the decomposing furnace (11) is connected with a tertiary air pipe (12).
3. The cement denitration pulverized coal distribution device according to claim 2, characterized in that: the third burner (7) and the sixth burner (10) are arranged at the upper part of the tertiary air pipe (12).
4. The cement denitration pulverized coal distribution device according to claim 1, characterized in that: the first coal powder distributor (2) comprises an inlet and two outlets, and the pipe diameters of the outlets are the same.
5. The cement denitration pulverized coal distribution device according to claim 1, characterized in that: the second coal powder distributor (3) comprises an inlet and three outlets, and the pipe diameters of the outlets are the same.
6. The cement denitration pulverized coal distribution device according to claim 5, characterized in that: the third coal powder distributor (4) comprises an inlet and three outlets, and the pipe diameters of the outlets are the same.
7. The cement denitration pulverized coal distribution device according to claim 6, characterized in that: and valves are arranged on pipelines connected with outlets of the second coal powder distributor (3) and the third coal powder distributor (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022241796.3U CN213480267U (en) | 2020-10-10 | 2020-10-10 | Cement denitration buggy distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022241796.3U CN213480267U (en) | 2020-10-10 | 2020-10-10 | Cement denitration buggy distributor |
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| Publication Number | Publication Date |
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| CN213480267U true CN213480267U (en) | 2021-06-18 |
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| CN202022241796.3U Active CN213480267U (en) | 2020-10-10 | 2020-10-10 | Cement denitration buggy distributor |
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| CN (1) | CN213480267U (en) |
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- 2020-10-10 CN CN202022241796.3U patent/CN213480267U/en active Active
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