CN216137004U - Rotary kiln burns system PNCR flue gas denitrification facility - Google Patents
Rotary kiln burns system PNCR flue gas denitrification facility Download PDFInfo
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- CN216137004U CN216137004U CN202122066208.1U CN202122066208U CN216137004U CN 216137004 U CN216137004 U CN 216137004U CN 202122066208 U CN202122066208 U CN 202122066208U CN 216137004 U CN216137004 U CN 216137004U
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Abstract
The utility model relates to a rotary kiln incineration system PNCR flue gas denitration device.A waste heat boiler is provided with a first hearth, a second hearth, a first water storage tank and a second water storage tank; the first hearth and the second hearth are arranged side by side, a filter screen is arranged between the first hearth and the second hearth, a smoke inlet and a plurality of denitration spray guns are arranged on a water-cooled wall of the first hearth, and a first ash falling pipe is arranged at the bottom of the first hearth; a smoke outlet is formed in the side wall of the second hearth, and a second ash falling pipe is arranged at the bottom of the second hearth; the first water storage tank is erected above the first hearth and the second hearth; the second water storage tank is arranged in the second hearth. The utility model fully mixes the high-molecular denitration agent powder with the flue gas to play a role in denitration, the whole reduction process is carried out in the boiler, the denitration efficiency is high, the combustion equipment and the heating surface of the boiler do not need to be greatly changed, the conventional operation mode of the boiler does not need to be changed, and the influence on the main operation parameters of the boiler is extremely small.
Description
Technical Field
The utility model belongs to the technical field of rotary kiln denitration systems, and particularly relates to a PNCR flue gas denitration device of a rotary kiln incineration system.
Background
NO of tail gas in solid waste incineration systemXThe reasons for this are generally two: thermal NOXWith fuel NOX. When the temperature is higher than 1500 ℃, nitrogen oxide generated by the reaction of nitrogen and oxygen in the air is thermal NOX. Such nitrogen oxides are formed only at high temperatures and are therefore commonly referred to as thermal NOXAnd when the temperature is lower than 1300 ℃, almost NO thermal NO existsXAnd (4) generating. The flue gas temperature in the secondary combustion chamber in the incineration system of the existing pyrolysis furnace is less than or equal to 1200 ℃, and the thermal NO is generated under the working conditionXThe amount of production is extremely small. Fuel type NOXIs generated by burning N-containing waste, in which case NO is generatedXThe generation of the N is inevitable, and the N content in the single batch of charging waste can be reduced only by a reasonable compatibility means.
Generally, NO in the flue gas is obtained by two means of reasonable compatibility and combustion temperature controlXThe concentration of the smoke denitration device can completely meet the design standard of project requirements, but in order to meet the stricter and stricter environmental emission requirements in the future, a new rotary kiln incineration system PNCR smoke denitration device needs to be researched and developed urgently.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provides a PNCR flue gas denitration device of a rotary kiln incineration system, which has high denitration efficiency and can be directly discharged outside.
The technical scheme for realizing the purpose of the utility model is as follows: a rotary kiln burning system PNCR flue gas denitration device is characterized in that a waste heat boiler is provided with a first hearth, a second hearth, a first water storage tank and a second water storage tank; the first hearth and the second hearth are arranged side by side, a filter screen is arranged between the first hearth and the second hearth, a smoke inlet and a plurality of denitration spray guns are arranged on a water-cooled wall of the first hearth, and a first ash falling pipe is arranged at the bottom of the first hearth; a smoke outlet is formed in the side wall of the second hearth, and a second ash falling pipe is arranged at the bottom of the second hearth; the first water storage tank is erected above the first hearth and the second hearth; the second water storage tank is arranged in the second hearth.
The denitration spray gun comprises a spray nozzle body, a piping and a mixing adapter; the nozzle body is connected with one end of the distribution pipe; the other end of the distribution pipe is connected with the mixing adapter through a flange; the mixing adapter has a feed port and a compressed air port thereon.
Above-mentioned technical scheme denitration spray gun position still is equipped with a plurality of denitration spray guns of reserving.
According to the technical scheme, temperature thermocouples are arranged on the upper section, the middle section and the lower section of the first hearth as required.
According to the technical scheme, the smoke inlet is provided with an expansion joint; and an explosion-proof observation door is arranged on the side wall of the first hearth.
According to the technical scheme, the outer sides of the first hearth and the second hearth are both provided with the heat-insulating layers.
According to the technical scheme, the ash removal access door is arranged on the side wall of the second hearth.
After the technical scheme is adopted, the utility model has the following positive effects:
the utility model fully mixes the high-molecular denitration agent powder with the flue gas to play a role in denitration, the whole reduction process is carried out in the boiler, the denitration efficiency is high, the combustion equipment and the heating surface of the boiler do not need to be greatly changed, the conventional operation mode of the boiler does not need to be changed, and the influence on the main operation parameters of the boiler is extremely small.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
fig. 3 is a schematic structural view of the denitration lance of the present invention.
Detailed Description
(example 1)
Referring to fig. 1 to 3, the present invention has a first furnace 1, a second furnace 2, a first water storage tank 3 and a second water storage tank 4; the first hearth 1 and the second hearth 2 are arranged side by side, a filter screen 5 is arranged between the first hearth 1 and the second hearth 2, a smoke inlet 6 and a plurality of denitration spray guns 10 are arranged on a water-cooled wall of the first hearth 1, and a first ash falling pipe 8 is arranged at the bottom of the first hearth; a smoke outlet 7 is formed in the side wall of the second hearth 2, a second ash falling pipe 9 is arranged at the bottom of the second hearth, and an expansion joint is arranged at the smoke inlet 6; the first water storage tank 3 is erected above the first hearth 1 and the second hearth 2; the second water storage tank 4 is arranged in the second hearth 2.
The denitration lance 10 includes a nozzle body 11, a pipe 12, and a mixing adapter 13; the nozzle body 11 is connected with one end of a pipe 12; the other end of the pipe 12 is connected to the mixing adapter 13 via a flange; the mixing adapter 13 is provided with a feeding port 14 and a compressed air port 15; a plurality of reserved denitration spray guns are further arranged at the 10 positions of the denitration spray guns.
In addition, the outer sides of the first hearth 1 and the second hearth 2 are respectively provided with a heat insulation layer 16, the upper, middle and lower sections of the first hearth 1 are provided with temperature thermocouples according to requirements, the side wall is provided with an explosion-proof observation door 17, and the side wall of the second hearth 2 is provided with an ash removal access door 18.
The first furnace of exhaust-heat boiler increases 4 denitration spray guns 10 (2 are reserved) to increase and use jetting device, can be used for getting rid of the NO in the flue gasX. The denitration spray gun 10 can be designed into a remote control plug-in type, so that coking of a spraying opening caused by the fact that a spraying device is not used is avoided.
The injection device is connected with a polymer denitration agent bin for storing the denitration agent.
The outlets of the first ash falling pipe and the second ash falling pipe can be provided with gate valves for control.
The working principle of the utility model is as follows: the flue gas of the rotary kiln enters from a flue gas inlet 6, and a solid denitration reducing agent is uniformly sprayed when the temperature of the flue gas in a hearth is proper, wherein the solid denitration reducing agent is formed by uniformly spraying the solid denitration reducing agentThe reducing agent is rapidly decomposed in the furnace and reacts with NO in the flue gasXReaction to form N2And H2O, the ash that falls of production drops from the ash falling pipe, and the heat transfer in the flue gas gives the water storage tank, when needs water, open the water storage tank the delivery port can, the outlet flue can set up the dust remover and filter the back and directly arrange.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a rotary kiln system PNCR flue gas denitrification facility that burns which characterized in that: the waste heat boiler is provided with a first hearth, a second hearth, a first water storage tank and a second water storage tank; the first hearth and the second hearth are arranged side by side, a filter screen is arranged between the first hearth and the second hearth, a smoke inlet and a plurality of denitration spray guns are arranged on a water-cooled wall of the first hearth, and a first ash falling pipe is arranged at the bottom of the first hearth; a smoke outlet is formed in the side wall of the second hearth, and a second ash falling pipe is arranged at the bottom of the second hearth; the first water storage tank is erected above the first hearth and the second hearth; the second water storage tank is arranged in the second hearth.
2. The rotary kiln burning system PNCR flue gas denitration device as claimed in claim 1, wherein: the denitration spray gun comprises a spray nozzle body, a piping and a mixing connector; the nozzle body is connected with one end of the distribution pipe; the other end of the distribution pipe is connected with the mixing adapter through a flange; the mixing adapter has a feed port and a compressed air port thereon.
3. The rotary kiln burning system PNCR flue gas denitration device as claimed in claim 2, wherein: and a plurality of reserved denitration spray guns are further arranged at the denitration spray gun positions.
4. The rotary kiln burning system PNCR flue gas denitration device as claimed in claim 3, wherein: temperature thermocouples are arranged on the upper section, the middle section and the lower section of the first hearth as required.
5. The rotary kiln burning system PNCR flue gas denitration device as claimed in claim 3, wherein: the smoke inlet is provided with an expansion joint; and an explosion-proof observation door is arranged on the side wall of the first hearth.
6. The rotary kiln incineration system PNCR flue gas denitration device as recited in any one of claims 2 to 5, characterized in that: and heat preservation layers are arranged on the outer sides of the first hearth and the second hearth.
7. The rotary kiln incineration system PNCR flue gas denitration device as recited in any one of claims 2 to 5, characterized in that: and the side wall of the second hearth is provided with an ash removal access door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122066208.1U CN216137004U (en) | 2021-08-30 | 2021-08-30 | Rotary kiln burns system PNCR flue gas denitrification facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122066208.1U CN216137004U (en) | 2021-08-30 | 2021-08-30 | Rotary kiln burns system PNCR flue gas denitrification facility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216137004U true CN216137004U (en) | 2022-03-29 |
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ID=80810430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122066208.1U Active CN216137004U (en) | 2021-08-30 | 2021-08-30 | Rotary kiln burns system PNCR flue gas denitrification facility |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216137004U (en) |
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2021
- 2021-08-30 CN CN202122066208.1U patent/CN216137004U/en active Active
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