CN220397527U - Primary air system of garbage incinerator - Google Patents
Primary air system of garbage incinerator Download PDFInfo
- Publication number
- CN220397527U CN220397527U CN202322103587.6U CN202322103587U CN220397527U CN 220397527 U CN220397527 U CN 220397527U CN 202322103587 U CN202322103587 U CN 202322103587U CN 220397527 U CN220397527 U CN 220397527U
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- Prior art keywords
- air
- primary air
- main pipe
- primary
- cooling
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- 238000001816 cooling Methods 0.000 claims abstract description 100
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 13
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 13
- 239000001301 oxygen Substances 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 239000002956 ash Substances 0.000 description 16
- 238000010586 diagram Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000010882 bottom ash Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 238000004056 waste incineration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
In the prior art, a primary air system of the garbage incinerator needs to be provided with a furnace wall cooling fan and a primary air fan, so that the system is relatively bulky, and moreover, the mutual matching of pressure heads of the two fans is also considered, so that the control of the air quantity of the incinerator is not facilitated. The utility model provides a primary air system of a garbage incinerator, which comprises a primary air fan, wherein cooling air generated by the primary air fan enters a primary air and cold air main pipe and then is divided into two branches, the cooling air of a first branch enters a furnace wall to cool the furnace wall, the cooling air of a second branch enters an air preheater, hot air from the furnace wall and hot air from the air preheater are collected and then enter the primary air and hot air main pipe, and then a branch pipe enters each ash bucket at the bottom of the grate of the incinerator to provide oxygen and heat required by drying for garbage incineration. Because no special furnace wall cooling air blower is needed, the system operation condition is more stable and the efficiency is higher.
Description
Technical Field
The utility model relates to a garbage incinerator system, in particular to a primary air system of a garbage incinerator.
Background
The cooling air conveying system of the existing waste incineration grate furnace wall is required to be provided with a special furnace wall cooling air blower, cooling air (natural normal-temperature air) generated by the furnace wall cooling air blower is conveyed into an air cooling wall of the incinerator through the blower, the furnace wall is cooled by the cooling air, and the temperature of the furnace wall is controlled by cooling the furnace wall, so that the overtemperature of the furnace wall is avoided.
The existing primary air conveying system of the garbage incinerator needs to be provided with a special primary air fan, and cooling air (natural normal-temperature air) generated by the primary air fan is heated by an air preheater.
The hot air of the furnace wall after absorbing heat is mixed with the primary air after heating and then enters a primary air hot air main pipe, and finally is conveyed to an ash bucket at the bottom of the furnace grate through an ash bucket air pipe at the bottom of the furnace, so that oxygen and heat required by drying are provided for garbage incineration.
However, the furnace wall cooling fan and the primary air fan are required to be arranged, so that the system is relatively bulky, and the fact that the pressure heads of the two fans are matched with each other can lead to the fact that one fan is in a low-efficiency state is also considered. When the operation is regulated, only the air quantity of the primary fan is generally considered, but the air quantity of the cooling air of the furnace wall is ignored and blown into the furnace, so that the control of the air quantity of the incinerator is not facilitated.
Disclosure of Invention
In order to solve the existing problems, the utility model provides a new air distribution mode, and the design pressure head of primary air is considered to be relatively close to the pressure head of the furnace wall cooling fan, the furnace wall cooling air quantity is relatively stable, the proportion of the furnace wall cooling air quantity to the total primary air quantity is relatively low, and the two modes have the condition of being combined into one. The utility model provides a primary air furnace wall cooling system of a garbage incinerator, which does not need to independently arrange a special furnace wall cooling fan, utilizes high-pressure cold air at an outlet of the primary air fan to adjust flow through a regulating valve, controls air quantity entering an air cooling wall, cools the furnace wall, mixes furnace wall cooling air after heat absorption with primary air heated by an air preheater, and then conveys the mixture to an ash bucket at the bottom of a fire grate to provide oxygen quantity and heat required by drying for garbage incineration. The problems of system swelling and low operation efficiency are effectively solved.
The utility model solves the technical problems by adopting a technical scheme that the primary air system of the garbage incinerator is characterized by comprising a primary air fan, wherein after cooling air (natural air) generated by the primary air fan enters a primary air and cold air main pipe, the primary air and cold air main pipe is divided into two branches, the cooling air of a first branch enters a furnace wall to cool the furnace wall, the cooling air of a second branch enters an air preheater, hot air from the furnace wall and hot air from the air preheater are collected and then enter a primary air and hot air main pipe, and then enter each ash bucket at the bottom of a grate of the incinerator through a branch pipe to provide oxygen and heat required by drying for garbage incineration.
Preferably, a standby primary air-cooling air main pipe is further arranged, a standby fan is arranged on a pipeline of the standby primary air-cooling air main pipe, the standby primary air-cooling air main pipe is connected with the primary air-cooling air main pipe in parallel, and primary air-cooling air flows into the two branches after passing through the primary air-cooling air main pipe or the standby primary air-cooling air main pipe.
Preferably, the spare fan and the outlet pipeline of the primary air fan are respectively provided with a regulating door for regulating the air quantity.
Preferably, a standby primary air and hot air main pipe is further arranged, a standby fan is arranged on a pipeline of the standby primary air and hot air main pipe, the standby primary air and hot air main pipe is connected in parallel, primary air and hot air passes through the primary air and hot air main pipe or the standby primary air and hot air main pipe and then enters each ash bucket at the bottom of the incinerator grate through an ash bucket branch air pipe at the bottom of the incinerator, and oxygen and heat required for drying are provided for garbage incineration.
Preferably, a standby primary air-cooling air main pipe is further arranged, the standby primary air-cooling air main pipe is connected with the primary air-cooling air main pipe in parallel, and primary air-cooling air flows into the two branches after passing through the primary air-cooling air main pipe or the standby primary air-cooling air main pipe.
The utility model has the beneficial effects that: the utility model provides a primary air system of a garbage incinerator, which combines a primary air blower and a furnace wall cooling air blower into a whole by utilizing the technical condition that the design pressure head of primary air is relatively close to the pressure head of the furnace wall cooling air blower, and simultaneously provides cooling air for the furnace wall by the primary air blower, hot air from the furnace wall and hot air from an air preheater are converged into one path, and enter each ash bucket at the bottom of the incinerator through a regulating gate, so that the garbage incineration provides oxygen and heat required by drying. The problems of system swelling and low operation efficiency are effectively solved. The method has the following technical effects: 1. one furnace wall cooling fan is reduced, and project cost is reduced; 2. when the combustion heat load is increased, the primary air quantity and the furnace wall cooling air quantity need to be increased, and the primary air quantity and the furnace wall cooling air quantity are synchronously increased and decreased; 3. and in the old scheme, the efficiency is reduced differently because the two fans mutually influence the operation working condition, and the scheme has only one fan, so that the operation working condition is more stable and the efficiency is higher.
Drawings
Fig. 1 is a device layout diagram of one embodiment of the prior art.
Fig. 2 is a device layout diagram of a first embodiment of the present utility model.
Fig. 3 is a device layout diagram of a second embodiment of the present utility model.
Fig. 4 is a device layout diagram of a third embodiment of the present utility model.
In the figure:
1.1 primary air blower, 1.2 furnace wall cold air blower and 1.3 standby blower,
2.1a air preheater cooling air duct, 2.1b furnace wall cooling air duct,
2.2a primary air-cooling air main pipe, 2.2a1 standby primary air-cooling air main pipe, 2.2b primary air-heating air main pipe, 2.2b1 standby primary air-heating air main pipe, 2.3 furnace bottom ash bucket branch air pipes,
3 an air-cooled wall of the incinerator,
4 an air pre-heater is provided with a heating device,
5 a garbage incinerator is provided with a plurality of garbage disposal boxes,
6.1 regulating the door.
Detailed Description
Fig. 1 is a device layout diagram of one embodiment of the prior art. In the prior art, the cooling air conveying system of the waste incineration grate furnace wall is required to be provided with a special furnace wall cooling air blower 1.2, cooling air (natural normal-temperature air) generated by the furnace wall cooling air blower 1.2 is conveyed into the incinerator air cooling wall 3 through a furnace wall cooling air pipe 2.1b, the furnace wall is cooled by the cooling air, the temperature of the furnace wall is controlled by cooling the furnace wall, the overtemperature of the furnace wall is avoided, and meanwhile, the temperature of the cooling air is increased due to heat absorption.
The existing primary air system of the garbage incinerator needs to be provided with a special primary air fan 1.1, and cooling air (natural normal-temperature air) generated by the primary air fan 1.1 enters an air preheater 4 through an air preheater cooling air pipe 2.1a to be heated.
The hot air of the furnace wall after absorbing heat is mixed with the primary air after heating and then enters a primary air hot air main pipe 2.2b, and finally is conveyed to each ash bucket at the bottom of the fire grate through an ash bucket air pipe 2.3 at the bottom of the furnace, so as to provide oxygen and heat required by drying for garbage incineration.
The problem in the prior art is that the furnace wall cooling fan 1.2 and the primary air fan 1.1 are required to be arranged, so that the system is relatively bulky, and moreover, the fact that the pressure heads of the two fans are mutually matched is also considered, so that one fan can be in a low-efficiency state is likely to be caused. When the operation is regulated, only the air quantity of the primary fan is generally considered, but the air quantity of the cooling air of the furnace wall is ignored, so that the control of the air quantity of the incinerator is not facilitated, and meanwhile, the operation of the fan is also not facilitated.
Fig. 2 is a device layout diagram of a first embodiment of the present utility model. In the example, the primary air system of the garbage incinerator comprises a primary air fan 1.1, wherein cooling air (natural air) generated by the primary air fan 1.1 enters a primary air and cold air main pipe 2.2a and then is divided into two branches, cold air of a first branch enters an air preheater 4 through an air preheater cooling air pipe 2.1a to be heated, and cooling air of a second branch enters an incinerator air cooling wall 3 through a furnace wall cooling air pipe 2.1b to cool the furnace wall and change the cold air into hot air. The hot air from the furnace wall and the hot air from the air preheater are collected and then enter a primary air hot air main pipe 2.2b, and then enter each ash bucket at the bottom of the incinerator grate through an ash bucket branch air pipe 2.3 at the bottom of the incinerator, so as to provide oxygen and heat required by drying for garbage incineration.
Unlike the prior art, in this example, a special furnace wall cooling air blower is not required, and the cooling air of the incinerator air cooling wall 3 is provided by the primary air blower 1.1. Compared with the prior art, the fan is only one fan, the operation condition is more stable, and the efficiency is higher.
Fig. 3 is a device layout diagram of a second embodiment of the present utility model. In this figure, unlike the first embodiment of the present utility model, in this case, a backup primary air-cooled air header 2.2a1 is further provided and a backup fan 1.3 is provided on the pipeline thereof, and the backup primary air-cooled air header 2.2a1 is connected in parallel with the primary air-cooled air header 2.2a. Primary air and cold air generated by the primary air fan 1.1 flow into the two branches after passing through the primary air and cold air main pipe or the primary air generated by the standby fan 1.3 passes through the standby primary air and cold air main pipe. Then, as in the first embodiment, the cold air of the first branch enters the air preheater 4 through the air preheater cooling air pipe 2.1a to be heated, and the cooling air of the second branch enters the incinerator air cooling wall 3 through the furnace wall cooling air pipe 2.1b to cool the furnace wall and change the cold air into hot air. The hot air from the furnace wall and the hot air from the air preheater are collected and then enter a primary air hot air main pipe 2.2b, and then enter each ash bucket at the bottom of the incinerator grate through an ash bucket branch air pipe 2.3 at the bottom of the incinerator, so as to provide oxygen and heat required by drying for garbage incineration.
When the primary air blower 1.1 is in a normal working state, the primary air cooling main pipe 2.2a is opened and the primary air blower 1.1 is opened; and closing the standby primary air hot air main pipe 2.2b1, and stopping the standby fan 1.3.
When the primary air fan 1.1 fails, the primary air cooling air main pipe 2.2a is closed, and the primary air fan 1.1 is closed; the standby primary air-cooled main pipe 2.2a1 is started and the standby fan 1.3 is started.
In this example, preferably, gates for adjusting the air volume are respectively provided on the outlet pipes of the backup fan 1.3 and the primary air fan 1.1.
Fig. 4 is a device layout diagram of a third embodiment of the present utility model. In this figure, a standby primary air main 2.2b1 is provided and a standby fan 1.3 is provided on the pipeline, and the standby primary air main 2.2b1 is connected in parallel with the primary air main 2.2b, which is different from the first embodiment of the present utility model. The primary air and hot air enter each ash bucket at the bottom of the incinerator grate through the branch air pipe of the bottom ash bucket after passing through the primary air and hot air main pipe 2.2b or the standby primary air and hot air main pipe 2.2b1, so as to provide oxygen and heat required by drying for garbage incineration.
In this example, under normal conditions of the primary air blower 1.1, the standby primary air hot air main pipe 2.2b1 is closed and the standby blower 1.3 is closed. After entering the primary air and cold air main pipe 2.2a, the cooling air (natural air) generated by the primary air fan 1.1 is divided into two branches, wherein cold air of the first branch enters the air preheater 4 through the air preheater cooling air pipe 2.1a to be heated, and cooling air of the second branch enters the incinerator air cooling wall 3 through the furnace wall cooling air pipe 2.1b to cool the furnace wall and change the cold air into hot air. The hot air from the furnace wall and the hot air from the air preheater are collected and then enter a primary air hot air main pipe 2.2b, and then enter each ash bucket at the bottom of the incinerator grate through an ash bucket branch air pipe 2.3 at the bottom of the incinerator, so as to provide oxygen and heat required by drying for garbage incineration.
When the primary air blower 1.1 fails, the primary air hot air main pipe 2.2b is closed, the standby primary air hot air main pipe 2.2b1 is started, and the normal operation of the primary air system is maintained under the action of the standby blower 1.3. In this example, the backup fan 1.3 generates a suction effect on the air preheater cooling duct 2.1a and the oven wall cooling duct 2.1b, and the primary air flowing through the backup fan 1.3 is hot air.
Preferably, in this example, a backup primary air/cold air duct 2.2a1 is also provided. When the primary air blower 1.1 fails, the primary air cooling air duct 2.2a is closed, and the standby primary air cooling air duct 2.2a1 is started.
Claims (5)
1. The primary air system of the garbage incinerator is characterized by comprising a primary air fan, wherein cooling air generated by the primary air fan enters a primary air cold air main pipe and then is divided into two branches, cooling air of a first branch enters a furnace wall to cool the furnace wall, cooling air of a second branch enters an air preheater, hot air from the furnace wall and hot air from the air preheater are collected and then enter the primary air hot air main pipe, and then enter each ash bucket at the bottom of the incinerator grate through a branch pipe to provide oxygen and heat required by drying for garbage incineration.
2. The primary air system of a garbage incinerator according to claim 1, wherein a standby primary air-cooling air main pipe is further arranged, a standby fan is arranged on a pipeline of the primary air-cooling air main pipe, the standby primary air-cooling air main pipe is connected with the primary air-cooling air main pipe in parallel, and primary air-cooling air flows into the two branches after passing through the primary air-cooling air main pipe or the standby primary air-cooling air main pipe.
3. The primary air system of a garbage incinerator according to claim 2, wherein the spare fan and the primary air fan are respectively provided with a regulating gate for regulating air quantity on an output pipeline.
4. The primary air system of the garbage incinerator according to claim 1, wherein a standby primary air and hot air main pipe is further arranged, a standby fan is arranged on a pipeline of the standby primary air and hot air main pipe, the standby primary air and hot air main pipe is connected in parallel with the primary air and hot air main pipe, primary air and hot air enter each ash bucket at the bottom of the incinerator grate through an ash bucket branch air pipe at the bottom of the incinerator after passing through the primary air and hot air main pipe or the standby primary air and hot air main pipe, and oxygen and heat required for drying are provided for garbage incineration.
5. The primary air system of a garbage incinerator according to claim 4, further comprising a standby primary air-cooling air main pipe, wherein the standby primary air-cooling air main pipe is connected with the primary air-cooling air main pipe in parallel, and primary air-cooling air flows into the two branches after passing through the primary air-cooling air main pipe or the standby primary air-cooling air main pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322103587.6U CN220397527U (en) | 2023-08-04 | 2023-08-04 | Primary air system of garbage incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322103587.6U CN220397527U (en) | 2023-08-04 | 2023-08-04 | Primary air system of garbage incinerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220397527U true CN220397527U (en) | 2024-01-26 |
Family
ID=89598245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322103587.6U Active CN220397527U (en) | 2023-08-04 | 2023-08-04 | Primary air system of garbage incinerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220397527U (en) |
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2023
- 2023-08-04 CN CN202322103587.6U patent/CN220397527U/en active Active
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