CN215892366U - Smoke circulating heating device of incinerator grate - Google Patents
Smoke circulating heating device of incinerator grate Download PDFInfo
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- CN215892366U CN215892366U CN202121924706.9U CN202121924706U CN215892366U CN 215892366 U CN215892366 U CN 215892366U CN 202121924706 U CN202121924706 U CN 202121924706U CN 215892366 U CN215892366 U CN 215892366U
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- flue gas
- incinerator
- circulating
- adjusting baffle
- primary air
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Abstract
The utility model discloses a flue gas circulating heating device of an incinerator grate, which comprises a primary air fan (1), a primary air adjusting baffle (2), a converging pipeline (4), a circulating flue gas fan (5) and a circulating flue gas adjusting baffle (6); a flue gas inlet of the circulating flue gas fan (5) is connected to a flue gas outlet of the incinerator flue gas waste heat utilization assembly through a pipeline, and a flue gas outlet of the circulating flue gas fan (5) is connected to one end of the converging pipeline (4) through a circulating flue gas adjusting baffle (6) through a pipeline; the air outlet of the primary air fan (1) is connected to one end of the converging pipeline (4) through a primary air adjusting baffle (2) by a pipeline, and the other end of the converging pipeline (4) is connected with the air inlet of an air supply slag hopper (91) of the incinerator (9). The utility model can improve the primary air temperature under the drying grate by circulating flue gas, thereby achieving the purpose of fully drying the garbage.
Description
Technical Field
The utility model relates to household garbage incineration equipment, in particular to a smoke circulating heating device of an incinerator grate.
Background
The incineration method is a main domestic garbage treatment mode at present, the heat value of the domestic garbage is low, the ash content of the domestic garbage is large, the domestic garbage is easy to agglomerate when being combusted in a combustion area of the incinerator, and the domestic garbage cannot be completely dried in a drying area. A certain distance exists between the drying area and the combustion area of the incinerator, and complete drying of the household garbage is difficult to realize only by supplying heat to the drying area through the combustion area, so that the temperature of combustion air is increased, and the drying and combustion of the garbage are facilitated. However, the combustion air temperature of the household garbage incinerator is mostly 220-230 ℃, the moisture evaporation process is a process of absorbing a large amount of heat but consuming no oxygen, for the household garbage with the heat value below 5000kj/kg, more heat needs to be consumed for the evaporation of the moisture, and the temperature under the grate of the drying area needs to be increased to 300 ℃ or even higher to ensure the sufficient drying of the low-heat-value garbage.
In the prior art, the process for improving the air temperature under the drying grate adopts a single external air temperature lifting device for heating. The air temperature lifting device comprises a fan, a steam air preheater, an adjusting baffle and the like, wherein the steam air preheater is arranged behind the fan, the air temperature is improved to 140-150 ℃ by utilizing the steam heat of steam extraction of a steam turbine of the steam air preheater, and then the air temperature is further improved to 230 ℃ by superheated steam or steam extraction of a steam drum of the second section of the steam air preheater. The traditional external air temperature lifting device has limited improvement of primary air temperature, cannot meet the temperature requirement of fully drying low-heat value garbage at a temperature of more than 300 ℃, and has the main purpose of drying the garbage by air supply under a drying grate, so that the garbage cannot be combusted, energy loss is caused, and the air temperature lifting device has large energy consumption and high cost.
Disclosure of Invention
The utility model aims to provide a smoke circulating heating device of an incinerator grate, which can improve the primary air temperature under a drying grate through circulating smoke so as to achieve the purpose of fully drying garbage.
The utility model is realized by the following steps:
a flue gas circulation heating device of an incinerator grate comprises a primary fan, a primary air adjusting baffle, a converging pipeline, a circulation flue gas fan and a circulation flue gas adjusting baffle; a flue gas inlet of the circulating flue gas fan is connected to a flue gas outlet of the incinerator flue gas waste heat utilization assembly, and a flue gas outlet of the circulating flue gas fan is connected to one end of the converging pipeline through a circulating flue gas adjusting baffle; the air outlet of the primary air fan is connected to one end of the converging pipeline through the primary air adjusting baffle, and the other end of the converging pipeline is connected with the air inlet of the air supply slag hopper of the incinerator.
And the converging pipeline is connected with a drying grate lower thermometer which is positioned below the air supply slag hopper.
The drying furnace lower thermometer, the primary air adjusting baffle and the circulating flue gas adjusting baffle are all externally connected to the controller.
The primary air adjusting baffle is connected with a primary air flowmeter.
And the circulating flue gas adjusting baffle is connected with a circulating flue gas flowmeter.
The incinerator flue gas waste heat utilization assembly comprises a superheater, an evaporator and an economizer which are sequentially connected, the superheater is connected to the incinerator, and the circulating flue gas fan is connected to the economizer.
Compared with the prior art, the utility model has the following beneficial effects:
1. the circulating flue gas fan is arranged, so that flue gas with the temperature higher than 300 ℃ in the economizer can be introduced into the converging pipeline, the waste heat of the flue gas is fully utilized, the temperature of primary air entering the drying grate is increased to be higher than 300 ℃, the temperature requirement of fully drying low-heat value garbage is met, an external air temperature increasing device is not needed, the energy consumption and the cost are reduced, and the energy is saved.
2. The circulating flue gas fan is arranged, so that flue gas and air can be mixed into high-temperature mixed gas, the air does not need to be heated, the consumption of high-temperature flue gas waste heat is reduced, the oxygen content of the mixed gas with the same volume is far lower than that of pure air, and the mixed gas is favorable for inhibiting the generation of original NOx in waste incineration flue gas after entering the incinerator.
3. The utility model is provided with the primary air adjusting baffle, the primary air flow meter, the circulating flue gas adjusting baffle, the circulating flue gas flow meter and the lower thermometer of the drying furnace, and can adjust the temperature of the mixed gas to a proper temperature range through the accurate and interlocking control of the air volume, the air pressure and the flue gas flow, so that the temperature requirement of fully drying the garbage can be met, and the utility model is particularly suitable for drying the garbage with low heat value and is suitable for different garbage incineration treatment processes.
The utility model can improve the primary air temperature under the drying grate through the circulating flue gas, fully utilizes the waste heat of the flue gas, can ensure that the temperature of the air entering the drying grate meets the temperature requirement of garbage drying without an external air temperature lifting device, achieves the aim of fully drying the low-heat value household garbage, reduces the energy consumption, saves the energy and has wide application range.
Drawings
FIG. 1 is a schematic view of the structure of a flue gas circulation heating device of a grate of an incinerator according to the present invention.
In the figure, a primary air fan 1, a primary air adjusting baffle 2, a primary air flow meter 3, a converging pipeline 4, a circulating flue gas fan 5, a circulating flue gas adjusting baffle 6, a circulating flue gas flow meter 7, a drying furnace lower temperature meter 8, an incinerator 9, an air supply slag hopper 91, a superheater 10, an evaporator 11 and an economizer 12 are arranged.
Detailed Description
The utility model is further described with reference to the following figures and specific examples.
Referring to the attached figure 1, the flue gas circulation heating device of the incinerator grate comprises a primary air fan 1, a primary air adjusting baffle 2, a converging pipeline 4, a circulation flue gas fan 5 and a circulation flue gas adjusting baffle 6; a flue gas inlet of the circulating flue gas fan 5 is connected to a flue gas outlet of the incinerator flue gas waste heat utilization assembly through a pipeline, and a flue gas outlet of the circulating flue gas fan 5 is connected to one end of the converging pipeline 4 through a circulating flue gas adjusting baffle 6 through a pipeline; the air outlet of the primary air fan 1 is connected to one end of the converging pipeline 4 through the primary air adjusting baffle 2 by a pipeline, and the other end of the converging pipeline 4 is connected with the air inlet of the air supply slag hopper 91 of the incinerator 9. The primary air fan 1 pumps normal temperature air with proper air pressure and air quantity into the converging pipeline 4 through the primary air adjusting baffle 2, the circulating flue gas fan 5 introduces high temperature (more than 300 ℃) flue gas in the incinerator flue gas waste heat utilization assembly into the converging pipeline 4 through the circulating flue gas adjusting baffle 6, the normal temperature air and the high temperature flue gas are mixed into mixed gas with the temperature not lower than 300 ℃ in the converging pipeline 4 and enter the air supply slag hopper 91, the air supply slag hopper 91 is positioned below the drying grate, and the mixed gas is used for fully drying garbage in the drying grate.
The converging pipeline 4 is connected with a drying grate lower thermometer 8, the drying grate lower thermometer 8 is positioned below the air supply slag hopper 91 and used for measuring the temperature of mixed gas entering the air supply slag hopper 91 so as to ensure that the temperature of the mixed gas can meet the temperature requirement of garbage drying and ensure that the temperature of the mixed gas can meet the requirement of fully drying low-heat value household garbage.
The drying furnace lower thermometer 8, the primary air adjusting baffle 2 and the circulating flue gas adjusting baffle 6 are all externally connected to the controller. The controller can adopt control equipment such as a PLC (programmable logic controller) and a variable frequency controller, and carries out linkage control on the opening degrees of the primary air adjusting baffle 2 and the circulating flue gas adjusting baffle 6 according to the temperature of the mixed gas in the converging pipeline 4 measured by the lower thermometer 8 of the drying grate, so that the air temperature of the mixed gas entering the drying grate and used for drying the garbage is controlled to be more than 300 ℃, the temperature requirement of garbage drying is met, and the low-heat-value garbage can be fully dried.
The primary air adjusting baffle 2 is connected with a primary air flowmeter 3 for detecting the flow of primary air and facilitating the linkage adjustment and control of air quantity and flue gas quantity.
And the circulating flue gas adjusting baffle 6 is connected with a circulating flue gas flowmeter 7 for detecting the flow of flue gas and facilitating linkage adjustment and control of the air quantity and the flue gas quantity.
The incinerator flue gas waste heat utilization assembly comprises a superheater 10, an evaporator 11 and an economizer 12 which are sequentially connected, the superheater 10 is connected to the incinerator 9, and the circulating flue gas fan 5 is connected to the economizer 12. The incinerator flue gas waste heat utilization assembly is used for carrying out waste heat utilization on flue gas generated by incinerating garbage in the incinerator 9, namely, high-temperature flue gas at about 950 ℃ is subjected to heat exchange utilization and is cooled to about 190 ℃, and meanwhile, high-temperature flue gas at a temperature higher than 300 ℃ is provided for the circulating flue gas fan 5.
The working principle of the utility model is as follows:
after waste heat of high-temperature flue gas generated by burning garbage in the incinerator 9 is recovered through the superheater 10, the evaporator 11 and the economizer 12 in sequence, flue gas with the temperature higher than 300 ℃ in the economizer 12 is led out through the circulating flue gas fan 5, the flue gas flow entering the converging pipeline 4 can be controlled by adjusting the opening degree of the circulating flue gas adjusting baffle 6, and the flue gas flow is measured through the circulating flue gas flowmeter 7. The primary air fan 1 provides air with proper air quantity and air pressure, the opening of the primary air adjusting baffle 2 is adjusted to control the air flow entering the converging pipeline 4, and the air flow is measured by the primary air flow meter 3. The normal temperature air and the high temperature flue gas are mixed to form mixed gas with the temperature not lower than 300 ℃, and the mixed gas is sent into a drying furnace row of the incinerator 9 through the air supply slag hopper 91 through the mixing pipeline 4 to be used for drying garbage. The temperature of the mixed gas is measured by a lower thermometer 8 of the drying grate, and the air temperature and the air quantity of the mixed gas can be accurately adjusted and controlled under the opening adjustment coordination of the primary air adjusting baffle 2 and the circulating flue gas adjusting baffle 6, so that the drying treatment requirement of the drying grate on the low-heat value garbage is met.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A smoke circulating heating device of an incinerator grate is characterized in that: comprises a primary air fan (1), a primary air adjusting baffle (2), a converging pipeline (4), a circulating flue gas fan (5) and a circulating flue gas adjusting baffle (6); a flue gas inlet of the circulating flue gas fan (5) is connected to a flue gas outlet of the incinerator flue gas waste heat utilization assembly, and a flue gas outlet of the circulating flue gas fan (5) is connected to one end of the converging pipeline (4) through a circulating flue gas adjusting baffle (6); the air outlet of the primary air fan (1) is connected to one end of the converging pipeline (4) through the primary air adjusting baffle (2), and the other end of the converging pipeline (4) is connected with the air inlet of an air supply slag hopper (91) of the incinerator (9).
2. The apparatus of claim 1, wherein the flue gas recirculation heating apparatus comprises: the converging pipeline (4) is connected with a drying grate lower thermometer (8), and the drying grate lower thermometer (8) is positioned below the air supply slag hopper (91).
3. The flue gas circulation heating apparatus of incinerator grates as claimed in claim 2, wherein: the drying furnace lower thermometer (8), the primary air adjusting baffle (2) and the circulating flue gas adjusting baffle (6) are all externally connected to the controller.
4. A flue gas recirculation heating apparatus of an incinerator grate as claimed in claim 1 or 3, wherein: the primary air adjusting baffle (2) is connected with a primary air flowmeter (3).
5. A flue gas recirculation heating apparatus of an incinerator grate as claimed in claim 1 or 3, wherein: and the circulating flue gas adjusting baffle (6) is connected with a circulating flue gas flowmeter (7).
6. The apparatus of claim 1, wherein the flue gas recirculation heating apparatus comprises: the incinerator flue gas waste heat utilization assembly comprises a superheater (10), an evaporator (11) and an economizer (12) which are connected in sequence, the superheater (10) is connected to the incinerator (9), and the circulating flue gas fan (5) is connected to the economizer (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121924706.9U CN215892366U (en) | 2021-08-17 | 2021-08-17 | Smoke circulating heating device of incinerator grate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121924706.9U CN215892366U (en) | 2021-08-17 | 2021-08-17 | Smoke circulating heating device of incinerator grate |
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| Publication Number | Publication Date |
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| CN215892366U true CN215892366U (en) | 2022-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121924706.9U Active CN215892366U (en) | 2021-08-17 | 2021-08-17 | Smoke circulating heating device of incinerator grate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114777131A (en) * | 2022-04-12 | 2022-07-22 | 生态环境部南京环境科学研究所 | Harmless secondary recycling system for waste incineration fly ash |
-
2021
- 2021-08-17 CN CN202121924706.9U patent/CN215892366U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114777131A (en) * | 2022-04-12 | 2022-07-22 | 生态环境部南京环境科学研究所 | Harmless secondary recycling system for waste incineration fly ash |
| CN114777131B (en) * | 2022-04-12 | 2023-12-08 | 生态环境部南京环境科学研究所 | Harmless secondary recycling system for waste incineration fly ash |
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