CN222578961U - Low-ammonia denitration cement decomposing furnace - Google Patents
Low-ammonia denitration cement decomposing furnace Download PDFInfo
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- CN222578961U CN222578961U CN202420374782.4U CN202420374782U CN222578961U CN 222578961 U CN222578961 U CN 222578961U CN 202420374782 U CN202420374782 U CN 202420374782U CN 222578961 U CN222578961 U CN 222578961U
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Abstract
一种低氨脱硝水泥分解炉，涉及分解炉的技术领域，其结构为：包括炉体、炉下体和炉顶，所述炉体顶部设置有炉顶，所述炉顶上方设置有出料管，所述炉体下面设置有炉下体，所述炉下体为锥形，所述炉下体上设置有燃烧器，所述炉下体底部设置有尾烟气管道；所述炉体两侧分别设置有下料管，所述下料管包括一级下料管和二级下料管，所述一级下料管和二级下料管分别连接在炉体上，所述一级下料管在二级下料管的上方。本实用新型的有益效果在于：炉体结构简单，燃烧器连接输煤管，多个燃烧器设置，燃烧更加充分，避免了煤粉不充分燃烧导致的氨水消耗量大的问题；下料管分级设置，提高了生料的分解效率，保证了水泥分解炉的节能生产。
A low-ammonia denitrification cement decomposition furnace relates to the technical field of decomposition furnaces, and its structure is as follows: it includes a furnace body, a furnace lower body and a furnace top, the furnace body is provided with a furnace top on the top, a discharge pipe is provided above the furnace top, a furnace lower body is provided below the furnace body, the furnace lower body is conical, a burner is provided on the furnace lower body, and a tail flue gas pipeline is provided at the bottom of the furnace lower body; feed pipes are provided on both sides of the furnace body, and the feed pipes include a primary feed pipe and a secondary feed pipe, the primary feed pipe and the secondary feed pipe are connected to the furnace body respectively, and the primary feed pipe is above the secondary feed pipe. The beneficial effects of the utility model are as follows: the furnace body has a simple structure, the burner is connected to the coal conveying pipe, and multiple burners are provided, so that the combustion is more complete, avoiding the problem of large ammonia consumption caused by incomplete combustion of coal powder; the feed pipes are arranged in stages, which improves the decomposition efficiency of raw materials and ensures the energy-saving production of cement decomposition furnaces.
Description
Technical Field
The utility model relates to the technical field of decomposing furnaces, in particular to a low-ammonia denitration cement decomposing furnace.
Background
The decomposing furnace is very important equipment in a cement production pre-decomposing system, is usually arranged at the kiln tail of a rotary kiln, bears the heavy tasks of burning, heat exchange, carbonate decomposition and the like of fuel in the pre-decomposing system, and works basically in such a way that preheated raw meal, a certain amount of fuel and a proper amount of hot gas are fed into the decomposing furnace at the same time, the raw meal is in a suspension or boiling state in the furnace, the raw meal and the fuel are fully dispersed and mixed in the furnace, the fuel burns in the furnace rapidly, and combustion heat is timely transferred to the raw meal, so that carbonate components in the raw meal absorb heat and decompose rapidly. The working process of the decomposing furnace is that the flue gas at the kiln tail of the rotary kiln is sprayed into the decomposing furnace from the bottom of the decomposing furnace, tertiary air at the kiln head, raw materials and fuel enter the decomposing furnace from the lower cone part of the decomposing furnace, and the decomposed raw materials and the combusted fuel in the decomposing furnace are discharged from the upper part of the decomposing furnace along with the gas.
The existing cement decomposing furnace is higher in temperature control and is controlled to be about 920 ℃ in normal operation, and because the existing burner and the coal injection pipe are arranged separately, coal dust cannot be fully combusted, so that the temperature of the decomposing furnace is unstable, the thermal and clinker yield fluctuation is large, the operation difficulty is high, the coal dust is insufficient in combustion, the nitrogen oxide fluctuation is large, the consumption of ammonia water per ton clinker is high, the denitration cost is high, and the decomposing efficiency is low due to the fact that the feeding pipe is arranged singly.
Disclosure of utility model
Aiming at the defects of the prior art, the utility model provides a low-ammonia denitration cement decomposing furnace to solve the problems.
The utility model provides a low-ammonia denitration cement decomposing furnace which comprises a furnace body, a furnace lower body and a furnace top, wherein the furnace top is arranged at the top of the furnace body, a discharging pipe is arranged above the furnace top, the furnace lower body is arranged below the furnace body, the furnace lower body is conical, a burner is arranged on the furnace lower body, tail flue gas pipelines are arranged at the bottom of the furnace lower body, blanking pipes are respectively arranged at two sides of the furnace body, each blanking pipe comprises a primary blanking pipe and a secondary blanking pipe, the primary blanking pipes and the secondary blanking pipes are respectively connected to the furnace body, and the primary blanking pipes are arranged above the secondary blanking pipes.
And a tertiary air pipe outlet is arranged at the junction of the lower end of the furnace body and the lower body of the furnace.
The number of the burners is 4, and the burners are uniformly arranged on the lower furnace body.
The burners are connected with coal conveying pipes, and the coal conveying pipes of the two burners are connected with a coal distributor.
The primary discharging pipe and the secondary discharging pipe are connected with a distributing valve, the primary discharging pipe and the secondary discharging pipe on the same side of the furnace body are connected with a distributing valve, a primary pipe feeding valve is arranged on the primary discharging pipe, and a secondary pipe feeding valve is arranged on the secondary discharging pipe.
The outlet of the tertiary air pipe is connected with a pipeline through an expansion joint, and a high-temperature gate valve is arranged on the pipeline.
The utility model has the beneficial effects that the furnace body is simple in structure, the burner is connected with the coal conveying pipe, the plurality of burners are arranged, the combustion is more complete, the problem of high ammonia water consumption caused by insufficient combustion of coal dust is avoided, the blanking pipes are arranged in a grading manner, the raw material decomposition efficiency is improved, and the energy-saving production of the cement decomposing furnace is ensured.
Drawings
FIG. 1 is a block diagram of the present utility model;
FIG. 2 is a bottom view of the present utility model;
In the figure, 1, a furnace body, 2, a furnace lower body, 3, a burner, 4, a tail flue gas pipeline, 5, a tertiary air pipe outlet, 6, a secondary blanking pipe, 7, a secondary feeding valve, 8, a primary blanking pipe, 9, a primary pipe feeding valve, 10, a distributing valve, 11, a discharging pipe, 12, a furnace top, 13, a coal conveying pipe, 14 and a coal distributor.
Detailed Description
Example 1
The utility model provides a low-ammonia denitration cement decomposing furnace, which is shown in figures 1-2 and structurally comprises a furnace body 1, a furnace lower body 2 and a furnace top 12, wherein the top of the furnace body 1 is provided with the furnace top 12, a discharging pipe 11 is arranged above the furnace top 12, the furnace lower body 2 is arranged below the furnace body 1, the furnace lower body 2 is conical, a combustor 3 is arranged on the furnace lower body 2, a tail flue gas pipeline 4 is arranged at the bottom of the furnace lower body 2, discharging pipes are respectively arranged at two sides of the furnace body 1, each discharging pipe comprises a primary discharging pipe 8 and a secondary discharging pipe 6, the primary discharging pipe 8 and the secondary discharging pipe 6 are respectively connected to the furnace body 1, and the primary discharging pipe 8 is arranged above the secondary discharging pipe 6;
Further, a tertiary air pipe outlet is arranged at the junction of the lower end of the furnace body 1 and the lower furnace body 2;
Further, 4 burners 3 are uniformly arranged on the lower furnace body 2;
Further, the burners 3 are connected with coal conveying pipes 13, and the coal conveying pipes 13 of the two burners 3 are connected with a coal distributor 14;
Further, the primary discharging pipe 8 and the secondary discharging pipe 6 are connected with a distributing valve 10, and the primary discharging pipe 8 and the secondary discharging pipe 6 on the same side of the furnace body 1 are connected with a distributing valve 10;
Further, a primary blanking pipe 8 and a secondary blanking pipe 6 are arranged on the same two sides of the furnace body 1;
Further, a primary pipe feeding valve 9 is arranged on the primary blanking pipe 8, and a secondary pipe feeding valve 7 is arranged on the secondary blanking pipe 6;
Further, the outlet of the tertiary air pipe is connected with a pipeline through an expansion joint, a high-temperature gate valve is arranged on the pipeline, and the air temperature of tertiary air is above 800 ℃;
specifically, the burners 3 are connected with the coal conveying pipe 13, the four burners 3 are arranged, combustion is more complete, the problem of large ammonia water consumption caused by insufficient combustion of coal dust is avoided, the blanking pipes are arranged in a grading manner, the primary blanking pipe 8 and the secondary blanking pipe 6 can simultaneously perform blanking, the blanking can be separated, and the decomposition efficiency of raw materials can be improved.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420374782.4U CN222578961U (en) | 2024-02-28 | 2024-02-28 | Low-ammonia denitration cement decomposing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420374782.4U CN222578961U (en) | 2024-02-28 | 2024-02-28 | Low-ammonia denitration cement decomposing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222578961U true CN222578961U (en) | 2025-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420374782.4U Active CN222578961U (en) | 2024-02-28 | 2024-02-28 | Low-ammonia denitration cement decomposing furnace |
Country Status (1)
| Country | Link |
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| CN (1) | CN222578961U (en) |
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- 2024-02-28 CN CN202420374782.4U patent/CN222578961U/en active Active
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