CN211040972U - Waste incineration equipment - Google Patents
Waste incineration equipment Download PDFInfo
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- CN211040972U CN211040972U CN201921284884.2U CN201921284884U CN211040972U CN 211040972 U CN211040972 U CN 211040972U CN 201921284884 U CN201921284884 U CN 201921284884U CN 211040972 U CN211040972 U CN 211040972U
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Abstract
The utility model provides a waste incineration equipment, waste incineration equipment includes: incineration boiler, flue gas purification device, recirculated flue gas pipeline, furnace wall cooling air outlet pipeline and furnace wall cooling air recycling pipeline, flue gasThe inlet of the purification device is connected with the flue gas outlet of the incineration boiler, the recirculated flue gas purified by the flue gas purification device enters the incineration boiler through the recirculated flue gas pipeline, the inlet of the furnace wall cooling air recycling pipeline is connected with the furnace wall cooling air outlet pipeline, and the outlet of the furnace wall cooling air recycling pipeline is connected with the recirculated flue gas pipeline. The utility model discloses a waste incineration equipment combines flue gas recirculation and oxygenating, replaces the overgrate air with the recirculation flue gas of hypoxemia and goes into the stove, reduces interior O of stove2The content can effectively reduce the generation of NOx; the heated furnace wall cooling air is used for oxygen supplement, the temperature of the recirculated flue gas cannot be reduced, and the corrosion is avoided. The design of flue gas recirculation and furnace wall cooling air oxygen supplement are independent and do not influence each other, and the regulation and control are flexible and rapid.
Description
Technical Field
The utility model relates to a refuse treatment field, in particular to refuse incinerator with refuse incinerator flue gas recirculation combination technology.
Background
Incinerator incineration treatment is a widely used garbage treatment technology at present, can realize recycling and reduction, and simultaneously has the problem of pollutant emission control. Especially NOx has a bad influence on the environment and NOx pollutant control is essential. If denitration in the furnace can be realized, and the generation amount of NOx is restrained from the source, great environmental and economic benefits can be brought. Flue gas recirculation is a low nitrogen combustion technique by reducing the amount of O in the furnace2Content and temperature to reduce NOx formation. The flue gas recirculation of the garbage incinerator mostly adopts a scheme of replacing secondary air with recirculated flue gas, namely replacing secondary air with low-oxygen flue gas to enter a hearth.
In the process of adopting flue gas recirculation, O in the furnace2The content is reduced, the furnace is influenced by fuel change and the like, the working condition in the incinerator fluctuates, the problem that CO exceeds the standard instantaneously can occur, and when O in the incinerator is used2The content is low, and the phenomenon of instantaneous exceeding of CO is possibly more frequent. The usual measures taken are direct shut-downThe secondary air is re-introduced into the recycling system, or the recycled flue gas and the secondary air are mixed into the furnace, and the like, so as to ensure a certain O in the furnace2And (4) content.
When the burning furnace has the problem that CO exceeds the standard instantaneously, certain O in the furnace is ensured2If the recycling system is directly shut down and secondary air is re-fed, after indexes are improved, the secondary air is shut down and recycled flue gas is re-fed, the regulation and control time is long, the switching operation is complicated, and the quick effectiveness is lacked; if the recycled flue gas and the secondary air are mixed into the furnace, the temperature of the mixed gas is lower than that of the original recycled flue gas, and when the temperature of the mixed gas is lower than the acid dew point, equipment corrosion can be caused, and long-term safe operation of the equipment is influenced.
Therefore, there is a need to propose a waste incineration plant to at least partially solve the above mentioned problems.
SUMMERY OF THE UTILITY MODEL
To prior art's not enough, the utility model provides a waste incineration equipment, a serial communication port, waste incineration equipment includes:
the system comprises an incineration boiler and a flue gas purification device, wherein an inlet of the flue gas purification device is connected with a flue gas outlet of the incineration boiler;
the inlet of the recirculation flue gas pipeline is connected with the outlet of the flue gas purification device, the outlet of the recirculation flue gas pipeline extends to the incineration boiler, and the recirculation flue gas purified by the flue gas purification device enters the incineration boiler through the recirculation flue gas pipeline;
the inlet of the furnace wall cooling air outlet pipeline is connected to the incineration boiler;
the furnace wall cooling air recycling pipeline is characterized in that an inlet of the furnace wall cooling air recycling pipeline is connected with the furnace wall cooling air outlet pipeline, and an outlet of the furnace wall cooling air recycling pipeline is connected with the recycled flue gas pipeline.
In one example, the furnace wall cooling air reuse pipeline is provided with a valve.
In one example, the recirculated flue gas duct includes a main duct and at least two branch ducts connected to the main duct.
In one example, a recirculation fan is arranged on the recirculation flue gas pipeline, and the recirculation fan comprises a primary secondary fan.
In one example, the main conduit and the at least two branch conduits of the recirculated flue gas conduit after the primary overfire air fan comprise primary overfire air conduits.
In one example, the recirculation fan is disposed downstream of a connection position of the furnace wall cooling air reuse pipe and the recirculation flue gas pipe in a flow direction of the recirculation flue gas.
In one example, the incineration boiler comprises an incinerator and a waste heat boiler connected in series.
In one example, the flue gas purification device comprises a reaction tower and a bag-type dust collector which are connected in sequence.
In one example, the bag-type dust collector is connected with an induced draft fan, and the induced draft fan is connected with a chimney.
In one example, the recirculated flue gas duct is connected between the induced draft fan and a stack.
In one example, the furnace wall cooling air outlet pipeline is connected with a primary air pipeline, and furnace wall cooling air heated in the incinerator passes through the furnace wall cooling air outlet pipeline, is mixed with the primary air and is introduced into the incinerator.
In one example, the outlet of the recirculated flue gas conduit extends to the incinerator.
The utility model provides a novel garbage incineration device, which comprises an incineration boiler and a flue gas purification device connected with the incineration boiler, wherein the inlet of the flue gas purification device is connected with the flue gas outlet of the incineration boiler, the garbage incineration device comprises a recirculation flue gas pipeline, one end of the recirculation flue gas pipeline (the inlet of the recirculation flue gas pipeline) is connected with a preset position of one end of the flue gas purification device (the outlet of the flue gas purification device) far away from the incineration furnace along the flue gas flowing direction, the other end of the recirculation flue gas pipeline (the outlet of the recirculation flue gas pipeline) extends to be close to the incineration furnace, the recirculation flue gas purified by the flue gas purification device enters the incineration furnace through the recirculation flue gas pipeline, a furnace wall cooling air outlet and an air outlet pipeline (a furnace wall cooling air outlet pipeline) connected with the furnace wall cooling air outlet are arranged on the incineration furnace, the air outlet pipeline is connected with the primary air pipeline, the garbage incineration equipment comprises a furnace wall cooling air recycling pipeline, one end (inlet) of the furnace wall cooling air recycling pipeline is connected with the air outlet pipeline, the other end (outlet) of the furnace wall cooling air recycling pipeline is connected with the recycling flue gas pipeline, and a valve is arranged on the furnace wall cooling air recycling pipeline. When the working condition is stable, the flue gas recirculation normally operates, and the heated furnace wall cooling air is not mixed with the recirculated flue gas. When the working condition is abnormal due to fuel change and the like, and the instantaneous value of CO rises, a valve on a furnace wall cooling air branch pipeline is immediately opened, and the heated furnace wall cooling air is mixed with the recirculated flue gas.
The utility model discloses a waste incineration equipment combines flue gas recirculation and oxygenating, replaces the overgrate air with the recirculation flue gas of hypoxemia and goes into the stove, reduces interior O of stove2The content can effectively reduce the generation of NOx and improve the speed and the temperature distribution in the furnace; the heated furnace wall cooling air is used for oxygen supplement, the temperature of the recirculated flue gas cannot be reduced, the corrosion is avoided, and the optimized combined design of the flue gas recirculation is realized. The design of flue gas recirculation and furnace wall cooling air oxygenating are independent and do not influence each other, and the valves on the branch pipelines are opened rapidly to mix when needed, so that the regulation and control means is flexible, rapid and effective.
Drawings
The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles of the invention.
In the drawings:
FIG. 1 is a schematic view of incineration treatment of household garbage; and
fig. 2 is a schematic view of a waste incineration plant with a combined flue gas recirculation process (flue gas recirculation replaces primary secondary air, and flue gas recirculation and furnace wall cooling air oxygenating are combined) in an embodiment of the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.
In the following description, specific method steps and/or structures are set forth in order to provide a thorough understanding of the present invention. It is apparent that the practice of the invention is not limited to the specific details known to those skilled in the art. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.
It is to be understood that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Like reference numerals refer to like elements throughout.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Incinerator incineration treatment is a widely used garbage treatment technology at present, can realize recycling and reduction, and simultaneously has the problem of pollutant emission control. Especially NOx has a bad influence on the environment and NOx pollutant control is essential. If can do soDenitration in the furnace can bring great environmental and economic benefits by inhibiting the generation amount of NOx from the source. Flue gas recirculation is a low nitrogen combustion technique by reducing the amount of O in the furnace2Content and temperature to reduce NOx formation. The flue gas recirculation of the garbage incinerator mostly adopts a scheme of replacing secondary air with recirculated flue gas, namely replacing secondary air with low-oxygen flue gas to enter a hearth.
In the process of adopting flue gas recirculation, O in the furnace2The content is reduced, the furnace is influenced by fuel change and the like, the working condition in the incinerator fluctuates, the problem that CO exceeds the standard instantaneously can occur, and when O in the incinerator is used2The content is low, and the phenomenon of instantaneous exceeding of CO is possibly more frequent. Measures usually adopted include directly shutting down the recirculation system and re-feeding secondary air, or mixing recirculated flue gas and secondary air into the furnace, etc., to ensure a certain O content in the furnace2And (4) content.
When the burning furnace has the problem that CO exceeds the standard instantaneously, certain O in the furnace is ensured2If the recycling system is directly shut down and secondary air is re-fed, after indexes are improved, the secondary air is shut down and recycled flue gas is re-fed, the regulation and control time is long, the switching operation is complicated, and the quick effectiveness is lacked; if the recycled flue gas and the secondary air are mixed into the furnace, the temperature of the mixed gas is lower than that of the original recycled flue gas, and when the temperature of the mixed gas is lower than the acid dew point, equipment corrosion can be caused, and long-term safe operation of the equipment is influenced.
The utility model provides a garbage incineration device, which comprises an incineration boiler and a smoke purification device connected with the incineration boiler,
the inlet of the smoke purification device is connected with the smoke outlet of the incinerator, the garbage incineration equipment comprises a recirculation smoke pipeline, one end (inlet) of the recirculation smoke pipeline is connected with a preset position of one end (outlet) of the smoke purification device far away from the incinerator along the smoke flowing direction, the other end (outlet) of the recirculation smoke pipeline extends to be close to the incinerator, the recirculation smoke purified by the smoke purification device enters the incinerator through the recirculation smoke pipeline, a furnace wall cooling air outlet and an air outlet pipeline (furnace wall cooling air outlet pipeline) connected with the furnace wall cooling air outlet are arranged on the incinerator, the air outlet pipeline is connected with a primary air pipeline, the garbage incineration equipment comprises a furnace wall cooling air recycling pipeline, one end (inlet) of the furnace wall cooling air recycling pipeline is connected with the air outlet pipeline, and the other end (outlet) of the furnace wall cooling air recycling pipeline is connected with the recirculation pipeline, the furnace wall cooling air recycling pipeline is provided with a valve. When the working condition is stable, the flue gas recirculation normally operates, and the heated furnace wall cooling air is not mixed with the recirculated flue gas. When the working condition is abnormal due to fuel change and the like, and the instantaneous value of CO rises, a valve on a furnace wall cooling air branch pipeline is immediately opened, and the heated furnace wall cooling air is mixed with the recirculated flue gas.
The utility model discloses a waste incineration equipment combines flue gas recirculation and oxygenating, replaces the overgrate air with the recirculated flue gas of hypoxemia, reduces interior O of stove2The content can effectively reduce the generation of NOx and improve the speed and the temperature distribution in the furnace; the heated furnace wall cooling air is used for oxygen supplement, the temperature of the recirculated flue gas cannot be reduced, the corrosion is avoided, and the optimized combined design of the flue gas recirculation is realized. The design of flue gas recirculation and furnace wall cooling air oxygenating are independent and do not influence each other, and the valves on the branch pipelines are opened rapidly to mix when needed, so that the regulation and control means is flexible, rapid and effective.
Figure 1 shows a typical form of incineration disposal of domestic waste. In this mode, the waste incineration apparatus 100 includes an incineration boiler 110 and a flue gas purification device 120 connected to the incineration boiler 110. The incineration boiler 110 includes an incinerator and a waste heat boiler connected in series. The waste incineration plant 100 further comprises a secondary air conduit 130, and secondary air is introduced into the incinerator through the secondary air conduit 130. The waste incineration apparatus 100 further includes a furnace wall cooling air outlet pipeline 140, the furnace wall cooling air outlet pipeline 140 is connected to the primary air pipeline 150, and the furnace wall cooling air heated in the incineration furnace passes through the furnace wall cooling air outlet pipeline 140 and then is mixed with the primary air. When the garbage is incinerated, the garbage is pushed into the incinerator to absorb high-temperature flue gas radiation in the incinerator, the garbage is dried and combusted under the action of primary air (about 220 ℃), secondary air (about 40 ℃) further promotes combustible combustion to promote flue gas turbulence, material slag is discharged from the tail end of the grate, generated flue gas enters a waste heat boiler from an outlet of the incinerator to exchange heat, and the generated flue gas is discharged to the atmosphere after passing through a flue gas purification device. The furnace wall cooling air is used for cooling the furnace wall and is heated at the same time, and the heated furnace wall cooling air is mixed with the primary air. Namely, the primary air part comes from the heated furnace wall cooling air.
Fig. 2 is a schematic view of a waste incineration plant 200 with a combined flue gas recirculation process according to an embodiment of the present invention. In one example, the waste incineration device 200 is used to incinerate household waste.
The waste incineration apparatus 200 includes an incineration boiler 210 and a flue gas purification device 220, an inlet of the flue gas purification device 220 is connected with an outlet of the incineration boiler 210. The incineration boiler 210 includes an incinerator 211 and a waste heat boiler 212 connected in series. The waste incineration device 200 further comprises a recirculated flue gas pipeline 230, an inlet of the recirculated flue gas pipeline 230 is connected to an outlet of the flue gas purification device 220, an outlet of the recirculated flue gas pipeline 230 extends to the incinerator 211, the recirculated flue gas purified by the flue gas purification device 220 enters the incinerator 211 through the recirculated flue gas pipeline 230, the incinerator 211 is provided with a furnace wall cooling air outlet (not shown in the figure) and an air outlet pipeline 240 connected to the furnace wall cooling air outlet, and the air outlet pipeline 240 is connected to the primary air pipeline 250. The waste incineration device 200 further comprises a furnace wall cooling air recycling pipeline 260, wherein an inlet of the furnace wall cooling air recycling pipeline 260 is connected with the air outlet pipeline 240, and an inlet of the furnace wall cooling air recycling pipeline 260 can be connected to any position of the air outlet pipeline 240 after coming out of the incinerator 211; the outlet of the furnace wall cooling air reuse pipe 260 may be connected to the recirculated flue gas pipe 230 at any position before the inlet of the fan. The furnace wall cooling air reuse pipe 260 is provided with a valve (not shown), and the valve can be arranged at any position in the furnace wall cooling air reuse pipe 260. When the incinerator runs stably, the valve is closed, when the instantaneous value of CO in the incinerator exceeds the standard, the valve is opened, and the heated furnace wall cooling air and the recirculated flue gas are mixed into the incinerator.
Particularly, when the working condition is stable, the flue gas recirculation normally runs, and the heated furnace wall cooling air and the recirculated flue gas are not mixedAnd (4) mixing. Recirculated flue gas (O)2Content of 5% -10%) instead of secondary air (O)2Content 21%), reduces O in furnace2The content, the reducing atmosphere in the furnace is enhanced, and the generation amount of fuel type NOx occupying the main body is reduced; the temperature of the recirculated flue gas (about 150 ℃) is higher than the temperature of the original secondary air (about 40 ℃), when the gas is in the same standard cubic meter, the volume flow of the flue gas is larger, the flow velocity of the gas entering the hearth from the secondary air pipe nozzle is increased, the disturbance is enhanced, the mixing degree of the gas is better, the combustion reaction distribution is more uniform, the local temperature of a combustion area is controlled, and the local high temperature is avoided. Flue gas recirculation this low nitrogen combustion technology has promoted denitration in the stove, has improved speed and temperature distribution in the stove.
When the working condition is abnormal due to fuel change and the like, and the instantaneous value of CO rises, a valve on a furnace wall cooling air branch pipeline is immediately opened, and the heated furnace wall cooling air is mixed with the recirculated flue gas. O of furnace wall cooling air2Higher (21%) than the recirculated flue gas (O)2Content of 5% -10%), can increase O content of recirculated mixed gas2The content, the CO value is reduced, and the adjusting process is quick and effective; meanwhile, the temperature of the heated furnace wall cooling air is high (about 150 ℃), and the temperature of the recirculated mixed gas cannot be reduced by mixing the heated furnace wall cooling air with the recirculated flue gas (about 150 ℃), so that the acid corrosion cannot be caused.
In one example, a primary air fan a is provided on the primary air line 250. In one example, an air preheater is provided on the primary air line 250.
In one example, the recirculated flue gas duct 230 includes a main duct 231 and at least two branch ducts 232 connected to the main duct 231.
In one example, the recirculation fan b on the main line 231 is a primary overfire air fan. Furthermore, a main pipeline and at least two branch pipelines behind the fan are original secondary air pipelines.
In one example, the recirculation fan is disposed downstream of a connection position of the furnace wall cooling air reuse pipe and the recirculation flue gas pipe in a flow direction of the recirculation flue gas. That is, the recirculation fan b is located closer to the incinerator 211 than the connection position of the furnace wall cooling air reuse pipe 260 and the recirculated flue gas pipe 230 in the flow direction of the recirculated flue gas in the recirculated flue gas pipe 230. Referring to fig. 2, the re-furnace wall cooling air reuse duct 260 is connected to the main duct 231 at a first connection point, at least two branch ducts 232 are connected to the main duct 231 at a second connection point, and a circulation fan b may be disposed between the first connection point and the second connection point.
In one example, the flue gas cleaning device 220 includes a reaction tower 221 and a bag-type dust collector 222 connected in series.
In one example, the bag-type dust collector 222 is connected with the induced draft fan c through a pipeline.
In one example, the induced draft fan c is connected with the chimney d through a pipeline.
In one example, the inlet of the recycled flue gas duct 230 is located between the induced draft fan c and the stack d.
Compared with the prior art, the utility model has the advantages of it is following:
1. replacing secondary air with low oxygen recirculated flue gas to reduce O in furnace2The content can effectively reduce the generation of NOx and improve the speed and the temperature distribution in the furnace. The generation of pollutants is inhibited from the source, the denitration pressure at the tail part of the flue gas is reduced, and great environmental and economic benefits are brought.
2. On the basis of a flue gas recirculation system, an oxygen supplementing system is additionally arranged, heated furnace wall cooling air and recirculated flue gas are mixed and fed into a furnace, and when the CO instantaneous value is increased due to the change of working conditions, the oxygen can be rapidly and effectively supplemented, and the CO index is ensured.
3. In the process of supplementing oxygen to the recirculated flue gas, the higher temperature of the mixed gas is ensured, and the phenomena of acid corrosion and the like are avoided.
4. The design of flue gas recirculation and furnace wall cooling air oxygen supplement are independent and do not influence each other, the regulation and control means is flexible, quick and effective, and the safety, stability and cleanness of operation are ensured.
The utility model provides a novel garbage incineration device, which comprises an incineration boiler and a flue gas purification device connected with the incineration boiler, wherein the inlet of the flue gas purification device is connected with the flue gas outlet of the incineration boiler, the garbage incineration device comprises a recirculation flue gas pipeline, one end of the recirculation flue gas pipeline (the inlet of the recirculation flue gas pipeline) is connected with a preset position of one end of the flue gas purification device (the outlet of the flue gas purification device) far away from the incineration furnace along the flue gas flowing direction, the other end of the recirculation flue gas pipeline (the outlet of the recirculation flue gas pipeline) extends to be close to the incineration furnace, the recirculation flue gas purified by the flue gas purification device enters the incineration furnace through the recirculation flue gas pipeline, a furnace wall cooling air outlet and an air outlet pipeline (a furnace wall cooling air outlet pipeline) connected with the furnace wall cooling air outlet are arranged on the incineration furnace, the air outlet pipeline is connected with the primary air pipeline, the garbage incineration equipment comprises a furnace wall cooling air recycling pipeline, one end (inlet) of the furnace wall cooling air recycling pipeline is connected with the position of the air outlet pipeline after coming out of the incinerator, the other end (outlet) of the furnace wall cooling air recycling pipeline is connected with the position of the recirculation flue gas pipeline in front of the fan, and a valve is arranged on the furnace wall cooling air recycling pipeline. When the working condition is stable, the flue gas recirculation normally operates, and the heated furnace wall cooling air is not mixed with the recirculated flue gas. When the instantaneous value of CO rises, a valve on a branch pipeline of the furnace wall cooling air is opened immediately, and the heated furnace wall cooling air is mixed with the recirculated flue gas.
The waste incineration equipment of the utility model combines the flue gas recirculation and the oxygen supplementation, and uses the recirculated flue gas with low oxygen to replace secondary air, thereby reducing the O2 content in the furnace, effectively reducing the generation of NOx and improving the speed and the temperature distribution in the furnace; the heated furnace wall cooling air is used for oxygen supplement, the temperature of the recirculated flue gas cannot be reduced, the corrosion is avoided, and the optimized combined design of the flue gas recirculation is realized. The design of flue gas recirculation and furnace wall cooling air oxygenating are independent and do not influence each other, and the valves on the branch pipelines are opened rapidly to mix when needed, so that the regulation and control means is flexible, rapid and effective.
The utility model discloses a similar replacement or the deformation of individual part among the waste incineration equipment or component all fall into within the protection scope of the utility model.
The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (12)
1. A waste incineration apparatus, characterized in that the waste incineration apparatus comprises:
the system comprises an incineration boiler and a flue gas purification device, wherein an inlet of the flue gas purification device is connected with a flue gas outlet of the incineration boiler;
the inlet of the recirculation flue gas pipeline is connected with the outlet of the flue gas purification device, the outlet of the recirculation flue gas pipeline extends to the incineration boiler, and the recirculation flue gas purified by the flue gas purification device enters the incineration boiler through the recirculation flue gas pipeline;
the inlet of the furnace wall cooling air outlet pipeline is connected to the incineration boiler;
the furnace wall cooling air recycling pipeline is characterized in that an inlet of the furnace wall cooling air recycling pipeline is connected with the furnace wall cooling air outlet pipeline, and an outlet of the furnace wall cooling air recycling pipeline is connected with the recycled flue gas pipeline.
2. The waste incineration facility of claim 1, wherein a valve is disposed on the furnace wall cooling air reuse pipe.
3. Waste incineration plant according to claim 1, characterised in that the recirculation flue gas line comprises a main line and at least two branch lines connected to the main line.
4. The waste incineration device of claim 3, wherein a recirculation fan is arranged on the recirculation flue gas pipeline, and the recirculation fan comprises a primary secondary fan.
5. A waste incineration plant according to claim 4, characterised in that the main and at least two branch lines of the recirculation flue gas line after the primary overfire air fan comprise primary overfire air lines.
6. The waste incineration apparatus according to claim 4, wherein the recirculation fan is disposed downstream of a connection position of the furnace wall cooling air reuse pipe and the recirculation flue gas pipe in a flow direction of the recirculation flue gas.
7. The waste incineration apparatus of claim 1, wherein the incineration boiler includes an incinerator and a waste heat boiler connected in series.
8. The waste incineration equipment of claim 1, wherein the flue gas purification device comprises a reaction tower and a bag-type dust collector which are connected in sequence.
9. The waste incineration device of claim 8, wherein the bag-type dust collector is connected with an induced draft fan, and the induced draft fan is connected with a chimney.
10. Waste incineration plant according to claim 9, characterised in that the recirculation flue gas pipe is connected between the induced draft fan and the chimney.
11. The waste incineration apparatus according to claim 7, wherein the furnace wall cooling air outlet pipeline is connected to a primary air pipeline, and the furnace wall cooling air heated in the incinerator passes through the furnace wall cooling air outlet pipeline, is mixed with the primary air, and is introduced into the incinerator.
12. Waste incineration plant according to claim 7, characterised in that the outlet of the recirculation flue gas duct extends to the incinerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921284884.2U CN211040972U (en) | 2019-08-08 | 2019-08-08 | Waste incineration equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921284884.2U CN211040972U (en) | 2019-08-08 | 2019-08-08 | Waste incineration equipment |
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| CN211040972U true CN211040972U (en) | 2020-07-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278944A (en) * | 2021-12-31 | 2022-04-05 | 上海康恒环境股份有限公司 | Flue gas recirculation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278944A (en) * | 2021-12-31 | 2022-04-05 | 上海康恒环境股份有限公司 | Flue gas recirculation system |
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