CN111780126B - Flue gas treatment system and method of solid incinerator coupling generator set - Google Patents

Flue gas treatment system and method of solid incinerator coupling generator set Download PDF

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Publication number
CN111780126B
CN111780126B CN202010594309.3A CN202010594309A CN111780126B CN 111780126 B CN111780126 B CN 111780126B CN 202010594309 A CN202010594309 A CN 202010594309A CN 111780126 B CN111780126 B CN 111780126B
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flue
air
generator set
flue gas
air door
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CN111780126A (en
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吴阿峰
石韬
樊晓茹
霍沛强
谭灿燊
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China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd
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China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd
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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
    • F23G5/46—Recuperation of heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/02—Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/14—Draining devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00—Preventing emissions
    • F23J2215/20—Sulfur; Compounds thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F23J2217/10—Intercepting solids by filters
    • F23J2217/102—Intercepting solids by filters electrostatic
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chimneys And Flues (AREA)

Abstract

The invention discloses a flue gas treatment system and a method for a solid incinerator coupling generator set, wherein the flue gas treatment system comprises a first flue, a second flue and a chimney; two ends of a first flue are respectively connected to a smoke outlet and a chimney of the generator set air preheater, and the first flue is provided with first dust removal equipment, a first induced draft fan and a first desulfurization device; one end of the second flue is connected to the smoke outlet of the air preheater of the solid combustion furnace, and the other end of the second flue is connected to a place between the smoke outlet of the air preheater of the generator set and the first dust removal equipment on the first flue through a first air door. The invention solves the problems that the existing generator set has insufficient system allowance and cannot meet sludge treatment, and the cost of the added independent sludge incinerator flue gas purification treatment system is high, and avoids the problems that the emergency deodorization system has high cost and is easy to generate secondary pollutants.

Description

Flue gas treatment system and method of solid incinerator coupled generator set
Technical Field
The invention relates to the field of solid treatment, in particular to a flue gas treatment system and method for a solid incinerator coupled engine unit.
Background
In the sewage purification process, some solid matters or added medicaments cannot be removed, and finally, the solid matters need to be discharged for treatment, and the solid matters are collectively called sludge. The components of the sludge are complex, and the sludge produced by different treatment modes has certain differences from components to characteristics. High-temperature incineration of sludge is one of the most effective harmless treatment processes, and the sludge is subjected to high-temperature decomposition and oxidation reaction, so that organic matters in the sludge can be almost completely decomposed, and inorganic compounds are also decomposed into compounds with simple structures, thereby reducing toxicity and harm, and the sludge is treated by adopting a high-temperature incineration mode.
At present, a mode of treating sludge mixed in a coal-fired power station and a garbage power station is adopted, but the mode is limited by the allowances of original coal-fired and garbage boilers and corresponding matching systems thereof, and the existing gas turbine units and oil turbine units cannot meet the requirement of sludge treatment. Therefore, the arrangement of the independent sludge incinerator on the existing generator set field is a development direction for effectively solving the sludge treatment problem.
However, in the flue gas purification treatment system matched with the independent sludge incinerator in the prior art, purified flue gas is discharged into an independent chimney, so that the required investment is large, the complexity is high, the occupied area is large, and the energy conservation and consumption reduction are not facilitated. And the emergent deodorization system of sludge incinerator among the prior art adopts the deodorant or the deodorant mode of chemistry of active carbon, and the cost is higher and produce secondary pollutant easily.
Disclosure of Invention
The invention provides a flue gas treatment system of a solid-state incinerator coupling generator set, which is used for solving the problems that the existing generator set system has insufficient allowance and cannot meet sludge treatment, and the cost is high due to the addition of an independent sludge incinerator flue gas purification treatment system.
Furthermore, the invention also solves the problems that the emergency deodorization system in the solid incinerator has higher cost and is easy to generate secondary pollutants.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a flue gas treatment system of a solid incinerator coupling generator set comprises a first flue, a second flue and a chimney, wherein two ends of the first flue are respectively connected to a smoke outlet and the chimney of an air preheater of the generator set; the first flue is provided with first dust removal equipment, a first induced draft fan and a first desulfurization device;
the second flue is connected to the solid and burns burning furnace air preheater exhaust port, and the second flue is connected to on the first flue through first air door and is located the generating set air preheater exhaust port and between the first dust collecting equipment.
Preferably, two ends of the first air duct are respectively connected to an air inlet of the air preheater of the solid incinerator and a matching room of the solid incinerator; the deodorization fan is arranged on the first air channel.
Preferably, two ends of the second air duct are connected to the air inlet of the generator set air preheater and the first air duct respectively, and a second air door is arranged on the second air duct.
Preferably, the second flue is provided with a second dust removing device, the second flue is further communicated with the first flue through a third air door, one end of the third air door is connected to the smoke inlet end or the smoke exhaust end of the first dust removing device, and the other end of the third air door is connected to the smoke exhaust end of the second dust removing device.
Preferably, the second dust removing device is a bag dust remover, an electric bag dust remover or an electrostatic dust remover.
Preferably, the second flue is further provided with a second induced draft fan, the second flue is further communicated with the first flue through a fourth air door, one end of the fourth air door is connected with an air outlet end of the second induced draft fan, and the other end of the fourth air door is connected to the first flue.
Preferably, the second flue is further provided with a second desulfurization device, the second flue is further communicated with the first flue through a fifth air door, one end of the fifth air door is connected to the smoke exhaust end of the second desulfurization device, and the other end of the fifth air door is connected to the smoke exhaust end or the smoke inlet end of the first desulfurization device.
Preferably, still be equipped with second denitrification facility on the second flue, the second flue still communicates with first flue through sixth air door, and the one end of sixth air door is connected to second denitrification facility's smoke exhaust end, and the other end of sixth air door is connected to first desulphurization unit's smoke exhaust end.
Preferably, the first dust removing equipment is a bag dust remover, an electric bag dust remover or an electrostatic dust remover.
In order to solve the same technical problem, the invention also provides a flue gas treatment method of the solid incinerator coupled generator set, which is a method for treating the flue gas by the flue gas treatment system, and comprises the following steps:
and the flue gas discharged from the smoke outlet of the air preheater of the solid combustion furnace enters a first flue for discharging the smoke from the smoke outlet of the air preheater of the generator set through a second flue, and is discharged through a chimney or directly discharged from the chimney after the flue gas treatment is carried out in the first flue.
The system and the method for treating the flue gas of the solid incinerator coupling generator set have the following beneficial effects that:
the invention provides a flue gas treatment system and a flue gas treatment method for a solid combustion furnace coupling generator set, wherein a second flue connected with a solid combustion furnace air preheater smoke outlet and a first flue connected with a generator set air preheater smoke outlet are communicated through a first air door, so that flue gas discharged from the solid combustion furnace air preheater smoke outlet enters the first flue, enters the first flue connected with the generator set air preheater smoke outlet under the action of the first air door, and is discharged through a chimney after being subjected to flue gas treatment together with the flue gas of the generator set in the first flue.
Therefore, the invention solves the problems that the system allowance of the existing generator set is insufficient and the sludge treatment cannot be met under the condition of not adding a separate solid incinerator flue gas purification treatment system, and avoids a high-cost treatment method.
Furthermore, odor in the solid incinerator matching room collected by the deodorization fan enters the solid incinerator air preheater through the first air duct, so that the odor enters the solid incinerator to participate in the solid incineration process; simultaneously the foul smell in the solid incinerator complete set room also can enter into the second wind channel through the second air door, then enters into generating set air preheater through the forced draught blower in second wind channel, participates in the burning process in the incinerator of generating set at last, and this has solved the problem that the emergent deodorization system cost of solid incinerator is higher and produce secondary pollutant easily.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a flue gas treatment system of a solid incinerator coupled generator set according to an embodiment of the present invention.
Description of reference numerals:
1. the device comprises a first flue, 2, a second flue, 3, a chimney, 4, a smoke outlet of an air preheater of a generator set, 5, first dust removal equipment, 6, a first induced draft fan, 7, a first desulfurization device, 8, a smoke outlet of the air preheater of the solid combustion furnace, 9, a first air door, 10, a first air duct, 11, a deodorization fan, 12, a matching room of the solid combustion furnace, 13, an air inlet of the air preheater of the solid combustion furnace, 14, a second air duct, 15, an air inlet of the air preheater of the generator set, 16, a second air door, 17, second dust removal equipment, 18, a third air door, 19, a second induced draft fan, 20, a fourth air door, 21, a second desulfurization device, 22, a fifth air door, 23, a second denitration device, 24, a sixth air door, 25 and a blower.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but the information should not be limited to these terms, which are used only to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
It should be noted that the attached drawing of the scheme is only a schematic system diagram, and not all the devices, valves, pipelines, measuring elements and other components which show the process requirements are not shown.
As shown in fig. 1, an embodiment of the present invention provides a flue gas treatment system of a solid incinerator coupled with a generator set. Wherein, the flue gas processing system of solid incinerator coupling generating set includes that at least a set of generating set and at least one solid incinerator of coupling burn burning furnace, and generating set include generating set air preheater, are equipped with generating set air preheater exhaust port 4 on the generating set air preheater, and generating set air preheater exhaust port 4 department is equipped with first off-the-shelf device (not shown in the figure), and the solid incinerator includes solid incinerator air preheater, is equipped with solid incinerator air preheater exhaust port 8 on the solid incinerator air preheater. The flue gas treatment system comprises a first flue 1, a second flue 2 and a chimney 3, wherein two ends of the first flue 1 are respectively connected to a smoke outlet 4 of an air preheater of the generator set and the chimney 3; be equipped with first dust collecting equipment 5, first draught fan 6, first desulphurization unit 7 on the first flue 1 for handle the generator and burn the flue gas that the burning furnace discharges out.
One end of the second flue 2 is connected to the solid incinerator air preheater exhaust port 8, the other end of the second flue 2 is connected to the first flue 1 through the first air door 9, and the first air door 9 is located between the generating set air preheater exhaust port 4 and the first dust removal equipment 5, so that the solid incinerator flue gas enters the generating set flue gas treatment system, and the coupling of the solid incinerator flue gas treatment system and the generating set flue gas treatment system is realized.
Preferably: the first dust-removing equipment 5 can be a bag-type dust remover, an electric bag dust remover or an electrostatic dust remover, and the desulfurization method adopted by the first desulfurization device 7 is dry desulfurization, semi-dry desulfurization or the two methods are used simultaneously.
Based on the technical scheme: the method comprises the steps that a second flue 2 connected with a solid incinerator air preheater smoke outlet 8 and a first flue 1 connected with a generator set air preheater smoke outlet 4 are communicated through a first air door 9, smoke discharged from the solid incinerator air preheater smoke outlet 8 enters the first flue 1, then enters the first flue 1 connected with the generator set air preheater smoke outlet 8 under the action of the first air door 9, and then is discharged through a chimney 3 after being subjected to smoke treatment together with the smoke of the generator set in the first flue 1.
It should be noted that the generator set incinerator air preheater and the solid incinerator air preheater of the present embodiment are existing devices, the present invention only treats flue gas discharged from the generator set incinerator and the solid incinerator, and the flow operation of the incineration process is not a critical point of the present invention.
In addition, the odor collected by the deodorizing fan 11 of the embodiment enters the solid incinerator air preheater through the first air duct 10, so that the odor enters the solid incinerator to participate in the solid incineration process, and is then discharged into the second flue 2 through the smoke outlet 4 of the solid incinerator air preheater, and then enters the first flue 1 through the coupling of the first flue 1 and the second flue 2, so that the odor is further treated with the flue gas of the generator set in the first flue 1 or is discharged through the chimney 3 or is directly discharged from the chimney 3, and thus the problems that the emergency deodorizing system of the solid incinerator is high in cost and secondary pollutants are easily generated are solved.
Further, two ends of a second air duct 14 of the embodiment are respectively connected to an air inlet 15 of the generator set air preheater and the first air duct 10, and a second air door 16 is arranged on the second air duct 14, so that odor in the solid combustion furnace matching room 12 can also enter the second air duct 14 through the second air door 16, and then enter the generator set air preheater through a blower 25 of the second air duct 14, so that the odor participates in the combustion process in the generator set combustion furnace, and then enters the first air duct 1 through the air inlet 15 of the generator set air preheater, and finally is discharged through a chimney 3 after being subjected to flue gas treatment in the first air duct 1, thereby also solving the problems that the solid combustion furnace emergency deodorization system is high in cost and is easy to generate secondary pollutants.
In this embodiment, when the margin of the first dust removing device 5 of the original generator set (the margin refers to the remaining working processing capacity on the basis of the original working processing capacity) is not enough, the second dust removing device 17 can be arranged on the second flue 2; when the second dust removing device 17 is a pre-dust removing device (the pre-dust removing device is a dust removing device with lower power), one end of the third air door 18 is connected with the smoke inlet end of the first dust removing device 5, and the other end is connected with the smoke outlet end of the second dust removing device 17; when the second dust removing device 17 is a dust removing device with larger power, one end of the third air door 18 is connected with the smoke exhaust port end of the first dust removing device 5, and the other end is connected with the smoke exhaust port end of the second dust removing device 17; and the second flue 2 is communicated with the first flue 1 through the third air door 18, so that the flue gas of the second flue 2 can enter the first flue 1 through the third air door 18 after being processed by the second dust removing device 17, and the workload of the first dust removing device 5 is reduced. Therefore, the embodiment can reduce the dust emission concentration of the coupled pollutants when the dust emission concentration of the pollutants after the coupling of the solid incinerator and the flue gas of the original generator set is too high and the allowance of the dust removal equipment of the original generator set is not enough.
In this embodiment, when the first induced draft fan 6 of the original generator set cannot meet the resistance requirements of the first flue 1, the second flue 2 and the on-way flue gas purification equipment, the second induced draft fan 19 can be arranged on the second flue 2; one end of the fourth air door 20 is connected with the air outlet end of the second induced draft fan 19, the other end of the fourth air door is connected with the first flue 1, so that flue gas of the second flue 2 can enter the first flue 1 through the fourth air door 20 after passing through the second induced draft fan 19, and the on-way assistance of the flue gas treatment system is reduced. Therefore, the problem that the resistance of the flue and the on-way flue gas purification equipment is large is solved, and the working efficiency of the flue gas coupling treatment system is improved.
In this embodiment, when the allowance of the first desulfurization device 7 of the original generator set is insufficient, the second desulfurization device 21 can be arranged on the second flue 2; wherein the second flue 2 is communicated with the first flue 1 through the fifth air door 22, the smoke exhaust end of the second desulphurization device 21 is connected to one end of the fifth air door 22, and the other end is connected to the smoke exhaust end or the smoke inlet end of the first desulphurization device 7, so that the flue gas of the second flue 2 can enter the first flue 1 through the fifth air door 22 after being desulfurized by the second desulphurization device 21, thereby reducing the workload of the first desulphurization device 7. Therefore, the embodiment can reduce the emission concentration of the coupled pollutants when the emission concentration of the pollutants after the solid incinerator is coupled with the flue gas of the original generator set is too high and the allowance of the desulfurization device of the original generator set is not enough.
In this embodiment, when the allowance of the first denitration device of the original generator set is not enough, the second denitration device 23 may be arranged on the second flue 2; wherein the second flue 2 is communicated with the first flue 1 through a sixth air door 24, one end of the sixth air door 24 is connected to the smoke exhaust port end of the second denitration device 23, and the other end is connected to the smoke exhaust port end of the first desulfurization device 7, so that the flue gas of the second flue 2 can enter the first flue 1 through the sixth air door 24 after being subjected to denitration treatment of the second denitration device 23, and the workload of the first denitration device is reduced. Therefore, the embodiment can reduce the emission concentration of the coupled pollutants when the emission concentration of the pollutants after the solid incinerator is coupled with the flue gas of the original generator set is too high and the allowance of the denitration device of the original generator set is not enough.
In addition, the embodiment of the invention also provides a flue gas treatment method of the solid incinerator coupling generator set, which is used for determining the type and the coupling point position of newly added flue gas treatment equipment, and the treatment method comprises the following steps:
flue gas discharged from the air preheater exhaust port 13 of the solid incinerator enters the first flue 1 for discharging flue gas from the generator set air preheater exhaust port 4 through the second flue 2, and is discharged through the chimney 3 or directly discharged from the chimney 3 after being subjected to flue gas treatment in the first flue 1.
Specifically, the method comprises the following steps:
step S1, firstly, calculating the pollutant emission concentration after mixing the solid incinerator and the original generator set flue gas, wherein the method specifically comprises the following steps:
s11, selecting a newly added solid incinerator type, an in-furnace desulfurization scheme and an in-furnace denitration scheme, and calculating the pollutant emission concentration of a hearth outlet.
And S12, determining the environmental protection emission standard corresponding to the newly added solid incinerator.
S13, calculating a pollutant emission concentration value C after the solid incinerator is mixed with the flue gas of the original generator set: the calculation formula is
Figure BDA0002554789890000081
Wherein Vs: volume, nm, of flue gas generated by combustion in a solid combustion furnace 3 /h；
Cs: the emission concentration of the atmospheric pollutants generated by the solid incinerator is g/Nm 3 ；
Vp: flue gas corresponding to coupling point of original generator setVolume, nm 3 /h；
Cp: atmospheric pollutant emission value, g/Nm, corresponding to coupling point of original generator set 3 ；
C: and the pollutant emission concentration of the solid incinerator coupled with the smoke of the original generator set.
S2, adding equipment corresponding to the second flue 2 and selecting a coupling point according to the result of the S13;
the method specifically comprises the following steps:
s21, if all the flue gas treatment results of the original generator set flue gas treatment system can meet the treatment requirements of the C value, the second flue 2 does not need to be additionally provided with a new flue gas purification device, flue gas discharged from the solid incinerator air preheater smoke outlet 8 enters the second flue 2, directly enters the first flue 1 connected with the generator set air preheater smoke outlet 4 through the first air door 9, and is finally discharged through the chimney 3 after being treated by the generator set flue gas treatment system.
S22, if the dust concentration in the pollutant emission concentration C is higher, the allowance of the first dust removal equipment 5 of the original generator set is insufficient, and the second dust removal equipment 17 needs to be additionally arranged on the second flue 2; when the second dust removing device 17 is a pre-dust removing device, the coupling point selects the inlet of the first dust removing device 5; when the second dust-removing device 17 is a dust-removing device with a relatively large power, the coupling point selects the outlet or the inlet of the first dust-removing device 5, preferably the inlet of the first dust-removing device 5. Therefore, after entering the second flue 2, the flue gas discharged from the air preheater smoke outlet 8 of the solid combustion furnace needs to be processed by the second dust removing equipment 17, then enters the first flue 1 connected with the generator air preheater smoke outlet 4 through the third air door 18, and finally is discharged through the chimney 3 after being processed by the flue gas processing system of the generator set.
And S23, if the concentration of the sulfur-containing gas in the pollutant emission concentration C is higher, the allowance of the first desulfurization device 7 of the original generator set is insufficient, the second desulfurization device 21 needs to be additionally arranged on the second flue 2, and the coupling point selects the outlet of the first desulfurization device 7. Therefore, after entering the second flue 2, the flue gas tapped by the air preheater smoke outlet 8 of the solid combustion furnace needs to be processed by the second desulfurization device 21, then enters the first flue 1 connected with the generator air preheater smoke outlet 4 through the fifth air door 22, and finally is discharged through the chimney 3 after being processed by the flue gas processing system of the generator set.
And S24, if the nitrate-containing gas concentration in the pollutant emission concentration C is higher, which indicates that the allowance of a first denitration device (not shown in the figure) of the original generator set is insufficient, the second flue 2 needs to be additionally provided with a second denitration device 23, and the coupling point selects any position behind the outlet of the first denitration device, preferably the outlet of the first desulfurization device 7. Therefore, after entering the second flue 2, the flue gas tapped by the air preheater smoke outlet 8 of the solid incinerator needs to be processed by the second denitration device 23, then enters the first flue 1 connected with the generator air preheater smoke outlet 4 through the sixth air door 24, and finally is directly discharged through the chimney 3.
And S25, if the allowance of the first induced draft fan 5 on the first flue 1 is insufficient, namely the resistance of the flue gas purification equipment on the first flue 1 and the second flue 2 cannot be overcome, the second induced draft fan 19 needs to be additionally arranged on the second flue 2, and the coupling point selects the outlet of the first induced draft fan 5. Therefore, after entering the second flue 2, the flue gas tapped by the air preheater smoke outlet 8 of the solid incinerator needs to be processed by the second induced draft fan 19, then enters the first flue 1 connected with the generator air preheater smoke outlet 4 through the fourth air door 20, and finally is discharged through the chimney 3 after being processed by the flue gas processing system of the generator set.
S26, if the equipment allowance of the flue gas treatment system of the original generator set is insufficient, the second flue 2 can be simultaneously provided with a second dust removal device 17, a second desulfurization device 21, a second denitrification device 23 and a second induced draft fan 19, and the coupling point selects the outlet of the first desulfurization device 7. Therefore, after entering the second flue 2, the flue gas tapped by the air preheater smoke outlet 8 of the solid incinerator needs to pass through the second dust removing device 17, the second induced draft fan 19, the second desulfurization device 21 and the second denitration device 23, then enters the first flue 1 connected with the generator air preheater smoke outlet 4 through the sixth air door 24, and finally is directly discharged through the chimney 3.
In conclusion, the invention provides a flue gas treatment system and a flue gas treatment method for a solid-state incinerator coupled generator set, which are used for solving the problems that the existing generator set is insufficient in system allowance and cannot meet sludge treatment, and the cost is high due to the fact that an independent sludge incinerator flue gas purification treatment system is additionally arranged.
Furthermore, the invention also solves the problems of higher cost and easy generation of secondary pollutants of the emergency deodorization system by introducing the odor in the solid incinerator matching room into the solid incinerator and the generator set incinerator.
The above is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims (7)

1. A flue gas treatment system of a solid incinerator coupling generator set is characterized by comprising a first flue, a second flue and a chimney, wherein two ends of the first flue are respectively connected to a smoke outlet of an air preheater of the generator set and the chimney; the first flue is provided with first dust removal equipment, a first induced draft fan and a first desulfurization device;
the second flue is connected to a smoke outlet of an air preheater of the solid incinerator and is connected to the first flue through a first air door and positioned between the smoke outlet of the air preheater of the generator set and first dust removal equipment;
a second dust removing device is arranged on the second flue, the second flue is also communicated with the first flue through a third air door, one end of the third air door is connected to the smoke inlet end or the smoke outlet end of the first dust removing device, and the other end of the third air door is connected to the smoke outlet end of the second dust removing device;
the second flue is also provided with a second desulfurization device and is communicated with the first flue through a fifth air door, one end of the fifth air door is connected to the smoke exhaust end of the second desulfurization device, and the other end of the fifth air door is connected to the smoke exhaust end or the smoke inlet end of the first desulfurization device;
still be equipped with second denitrification facility on the second flue, the second flue still through sixth air door with first flue intercommunication, the one end of sixth air door is connected to second denitrification facility's smoke exhaust end, the other end of sixth air door is connected to first desulfurization facility's smoke exhaust end.
2. The system for treating the flue gas of the solid incinerator coupled generator set according to claim 1, further comprising a first air duct and a deodorizing fan, wherein both ends of the first air duct are respectively connected to an air inlet of the solid incinerator air preheater and the solid incinerator matching room; the deodorization fan is arranged on the first air channel.
3. The system for treating flue gas of a solid incinerator coupled generator set according to claim 2, further comprising a second air duct, both ends of said second air duct are connected to the air inlet of the generator set air preheater and said first air duct respectively, and a second air door is provided on said second air duct.
4. The flue gas treatment system of the solid incinerator coupled generator set according to claim 1, characterized in that said second dust removing equipment is a bag dust remover, an electric bag dust remover or an electrostatic dust remover.
5. The system for treating flue gas of a solid incinerator coupled generator set according to claim 1, wherein a second induced draft fan is further arranged on said second flue, said second flue is further communicated with said first flue through a fourth air door, one end of said fourth air door is connected to an air outlet end of said second induced draft fan, and the other end of said fourth air door is connected to said first flue.
6. The flue gas treatment system of the solid incinerator coupled generator set according to any one of claims 1 to 5, characterized in that said first dust removing equipment is a bag dust remover, an electric bag dust remover or an electrostatic dust remover.
7. A flue gas treatment method of a solid incinerator coupled generator set, characterized in that the flue gas treatment method is a method which is carried out by using the flue gas treatment system of any one of claims 1 to 6, and comprises the following steps:
and the flue gas discharged from the smoke outlet of the air preheater of the solid combustion furnace enters a first flue for discharging the smoke from the smoke outlet of the air preheater of the generator set through a second flue, and is discharged through a chimney or directly discharged from the chimney after the flue gas treatment is carried out in the first flue.
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