CN112902173A - Device for burning up solid waste by adopting high-temperature primary and secondary air - Google Patents
Device for burning up solid waste by adopting high-temperature primary and secondary air Download PDFInfo
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- CN112902173A CN112902173A CN202110168829.2A CN202110168829A CN112902173A CN 112902173 A CN112902173 A CN 112902173A CN 202110168829 A CN202110168829 A CN 202110168829A CN 112902173 A CN112902173 A CN 112902173A
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- China
- Prior art keywords
- solid waste
- secondary air
- pipe
- waste powder
- temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/30—Solid combustion residues, e.g. bottom or flyash
Abstract
The utility model provides an adopt solid useless device of high temperature overgrate air after-combustion, relates to the burner field. The burner aims at solving the problem that solid waste powder is difficult to burn out in the existing burner, so that the combustion stability is poor. The inside of the solid waste powder pipeline is provided with a diffusion pipe, the input end of the diffusion pipe is communicated with one end of a mixing pipe, the output end of the Laval nozzle is inserted into one end of the solid waste powder pipeline, and a secondary air pipe is sleeved on the outer surface of the circumference of the other end of the solid waste powder pipeline. The invention is applicable to the field of combustion devices.
Description
Technical Field
The invention relates to the field of combustion devices, in particular to a device for burning out solid wastes by adopting high-temperature primary and secondary air.
Background
With the development of industrial production, the amount of industrial waste is increasing. The industrial waste is large in quantity, various in types, complex in components and quite difficult to treat. The discharge amount of industrial solid wastes is increased. At present, the treatment is still carried out by landfill and accumulation, a large amount of land is occupied, waste of manpower and material resources is caused, and the human health is seriously harmed.
For solid waste powder, the carbonization degree is high, the volatile content is low, the ash content is high, and the solid waste powder is very difficult to catch fire, stably burn and burn out. The W flame combustion mode improves the problems of ignition, stable combustion and burnout of low-volatile refractory coal from the application. However, from the operation feedback of various W-shaped flame boilers put into operation at present, the problem of low combustion efficiency still generally exists when anthracite with ultra-low volatile components is used, and solid wastes cannot be used. The circulating fluidized bed technology has the advantages of high combustion efficiency and low pollution for burning inferior fuel. However, the solid waste powder is ignited and burnt out at high temperature, so that the combustion temperature of the circulating fluidized bed hearth is about 850 ℃, and the solid waste powder cannot be treated.
Chinese patent (application patent No. CN201810281716.1, application publication No. CN108800109A) discloses a device and method for supplying high temperature air for pulverized coal fired boilers, which utilizes high temperature flue gas discharged from the pulverized coal fired boiler, and after increasing oxygen concentration and removing smoke dust in the high temperature flue gas, the high temperature flue gas is fed into the pulverized coal fired boiler again to burn pulverized coal. But the dust removal system and the oxygen generation equipment are required to be added, the investment is increased, and the economy is low when the solid waste powder is burnt.
In summary, the conventional burner has the problem that solid waste powder is difficult to burn out, so that the combustion stability is poor.
Disclosure of Invention
The invention provides a device for burning off solid waste by adopting high-temperature primary and secondary air, aiming at solving the problem of poor combustion stability caused by difficult burning off of solid waste powder in the existing combustor.
The invention relates to a device for burning out solid waste by adopting high-temperature primary and secondary air, which comprises a Laval nozzle, a mixing pipe, a diffusion pipe, a solid waste powder pipeline and a secondary air pipe;
a diffusion pipe is arranged in the solid waste powder pipeline, the input end of the diffusion pipe is communicated with one end of the mixing pipe, the output end of the Laval nozzle is inserted into one end of the solid waste powder pipeline, and a secondary air pipe is sleeved on the circumferential outer surface of the other end of the solid waste powder pipeline;
further, swirl vanes are arranged inside the secondary air pipe;
further, the temperature of high-temperature air sprayed by the Laval nozzle is 1300 ℃;
furthermore, the output end of the diffusion tube is in a horn shape;
furthermore, the Laval nozzle, the mixing pipe, the diffusion pipe, the solid waste powder pipeline and the secondary air pipe are coaxially arranged;
further, when the device is used, the Laval nozzle sprays high-temperature air at 1300 ℃, solid waste powder is guided to the mixing pipe and the diffusion pipe, then enters the front end of the solid waste powder pipeline to ignite the solid waste powder, and finally is sprayed into a hearth for combustion; the high-temperature rotational flow secondary air is supplemented, the burnout of the solid waste powder is further improved, and the solid waste powder pipeline is filled with the solid waste powder and other solid fuels with low volatile contents.
Compared with the prior art, the invention has the following beneficial effects:
the invention adopts high-speed high-temperature gas at the outlet of the nozzle to entrain part of solid waste powder to quickly enter the mixing pipe, strong heat transfer and mass transfer are carried out in the mixing pipe, the speed is gradually balanced and mixed strongly in the flowing process, the high-temperature gas and the solid waste powder enter the diffusion pipe from the mixing pipe, the speed is reduced, the static pressure is increased, and the high-temperature air and the solid waste powder are sprayed and fired. The cyclone secondary air greatly increases the air speed and the cyclone strength due to the introduction of high-temperature gas, so that the solid waste powder sprayed out from the solid waste powder pipeline is fully mixed with the high-temperature secondary air, and the waste powder is further combusted. The method utilizes the characteristics of high-temperature gas combined with the ejector, and improves the burnout rate of the solid waste powder in a step-by-step combustion mode, thereby improving the combustion stability.
Drawings
FIG. 1 is a cross-sectional view of an apparatus for using high temperature secondary air to burn off solid waste in accordance with the present invention.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1, and the device for burning out solid waste by using high-temperature primary and secondary air in the embodiment comprises a laval nozzle 1, a mixing pipe 2, a diffusion pipe 3, a solid waste powder pipeline 4 and a secondary air pipe 5;
a diffusion pipe 3 is arranged inside the solid waste powder pipeline 4, the input end of the diffusion pipe 3 is communicated with one end of the mixing pipe 2, the output end of the Laval nozzle 1 is inserted into one end of the solid waste powder pipeline 4, and a secondary air pipe 5 is sleeved on the circumferential outer surface of the other end of the solid waste powder pipeline 4;
in the specific embodiment, when the device is used, the Laval nozzle 1 sprays high-temperature air at 1300 ℃, solid waste powder is guided to the mixing pipe 2 and the diffusion pipe 3, then enters the front end of the solid waste powder pipeline 4 to ignite the solid waste powder, and finally is sprayed into a hearth for combustion; the high-temperature rotational flow secondary air is supplemented, the burnout of the solid waste powder is further improved, and the solid waste powder pipeline 4 is filled with the solid waste powder and other solid fuels with low volatile contents.
The second embodiment is as follows: the present embodiment will be described with reference to fig. 1, which is a further limitation of the combustion apparatus according to the first embodiment, and the apparatus for burning off solid wastes by using high-temperature secondary air according to the present embodiment is provided with swirl vanes 6 inside the secondary air duct 5;
in the embodiment, the cyclone blades 6 are arranged in the secondary air pipe 5, the cyclone blades are arranged in the secondary air channel, and the solid waste powder and air are uniformly mixed by rotating air flow under the disturbance action of the air flow, so that the solid waste powder is burnt out, and the combustion stability is improved; the primary air introduced into the nozzle is high-pressure air, so that the temperature of the primary air can be properly reduced, and the injection effect can be realized.
The third concrete implementation mode: the present embodiment will be described with reference to fig. 1, which is a further limitation of the combustion apparatus according to the first embodiment, and the apparatus for burning off solid wastes by using the high-temperature secondary air according to the present embodiment is configured such that the temperature of the high-temperature air ejected from the laval nozzle 1 is 1300 ℃.
The fourth concrete implementation mode: the present embodiment is described with reference to fig. 1, and is a further limitation of the combustion apparatus according to the first embodiment, in which the high-temperature secondary air is used to burn off the solid waste, and the output end of the diffuser 3 is in a horn shape;
in the specific embodiment, the output end of the diffusion pipe 3 is in a horn shape, and when the diffusion pipe 3 is used for spraying solid waste powder, the spraying area is enlarged, and the combustion stability is improved.
The fifth concrete implementation mode: the present embodiment will be described with reference to fig. 1, which is a further limitation of the combustion apparatus according to the first embodiment, and the apparatus for burning off solid wastes by using high-temperature secondary air according to the present embodiment is characterized in that the laval nozzle 1, the mixing pipe 2, the diffuser pipe 3, the solid waste powder duct 4, and the secondary air duct 5 are coaxially disposed.
Principle of operation
When in use, the Laval nozzle 1 sprays high-temperature air at 1300 ℃, solid waste powder is guided to the mixing pipe 2 and the diffusion pipe 3, then enters the front end of the solid waste powder pipeline 4 to ignite the solid waste powder, and finally is sprayed into a hearth for combustion; the high-temperature rotational flow secondary air is supplemented, the burnout of the solid waste powder is further improved, and the solid waste powder pipeline 4 is filled with the solid waste powder and other solid fuels with low volatile contents.
Claims (5)
1. The utility model provides an adopt solid useless device of high temperature overgrate air after-combustion which characterized in that: comprises a Laval nozzle (1), a mixing pipe (2), a diffusion pipe (3), a solid waste powder pipeline (4) and a secondary air pipe (5);
the inside of useless powder pipeline admittedly (4) is equipped with diffuser pipe (3), and the input of diffuser pipe (3) sets up with the one end intercommunication of hybrid tube (2), and the output cartridge of Laval nozzle (1) is to the one end of useless powder pipeline admittedly (4), and the cover is equipped with secondary air pipe (5) on the other end circumference surface of useless powder pipeline admittedly (4).
2. The device for burning off solid wastes by adopting the high-temperature primary and secondary air as claimed in claim 1, is characterized in that: and swirl vanes (6) are arranged inside the secondary air pipe (5).
3. The device for burning off solid wastes by adopting the high-temperature primary and secondary air as claimed in claim 1, is characterized in that: the temperature of the high-temperature air sprayed by the Laval nozzle (1) is 1300 ℃.
4. The device for burning off solid wastes by adopting the high-temperature primary and secondary air as claimed in claim 1, is characterized in that: the output end of the diffusion pipe (3) is in a horn shape.
5. The device for burning off solid wastes by adopting the high-temperature primary and secondary air as claimed in claim 1, is characterized in that: the Laval nozzle (1), the mixing pipe (2), the diffusion pipe (3), the solid waste powder pipeline (4) and the secondary air pipe (5) are coaxially arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110168829.2A CN112902173B (en) | 2021-02-07 | 2021-02-07 | Device for burning up solid waste by adopting high-temperature primary and secondary air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110168829.2A CN112902173B (en) | 2021-02-07 | 2021-02-07 | Device for burning up solid waste by adopting high-temperature primary and secondary air |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112902173A true CN112902173A (en) | 2021-06-04 |
| CN112902173B CN112902173B (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110168829.2A Active CN112902173B (en) | 2021-02-07 | 2021-02-07 | Device for burning up solid waste by adopting high-temperature primary and secondary air |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5937770A (en) * | 1996-05-24 | 1999-08-17 | Babcock-Hitachi Kabushiki Kaisha | Pulverized coal burner |
| CN2779250Y (en) * | 2005-01-21 | 2006-05-10 | 周荣贵 | Cellular multi-stage rotary flow coal burner |
| RU2294486C1 (en) * | 2005-07-26 | 2007-02-27 | Институт теплофизики им. С.С. Кутателадзе Сибирского отделения Российской Академии наук | Pulverized-coal burner |
| CN201170548Y (en) * | 2007-09-05 | 2008-12-24 | 航天空气动力技术研究院 | Novel plasma arc ignition device system |
| US20130112120A1 (en) * | 2011-05-27 | 2013-05-09 | Yuehua Li | Dense Phase Swirl Pulverized Coal Burner |
-
2021
- 2021-02-07 CN CN202110168829.2A patent/CN112902173B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5937770A (en) * | 1996-05-24 | 1999-08-17 | Babcock-Hitachi Kabushiki Kaisha | Pulverized coal burner |
| CN2779250Y (en) * | 2005-01-21 | 2006-05-10 | 周荣贵 | Cellular multi-stage rotary flow coal burner |
| RU2294486C1 (en) * | 2005-07-26 | 2007-02-27 | Институт теплофизики им. С.С. Кутателадзе Сибирского отделения Российской Академии наук | Pulverized-coal burner |
| CN201170548Y (en) * | 2007-09-05 | 2008-12-24 | 航天空气动力技术研究院 | Novel plasma arc ignition device system |
| US20130112120A1 (en) * | 2011-05-27 | 2013-05-09 | Yuehua Li | Dense Phase Swirl Pulverized Coal Burner |
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| Publication number | Publication date |
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| CN112902173B (en) | 2022-03-04 |
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