CN113803737A - Device and method for parallel processing of flue gas from garbage furnace and coal-fired furnace - Google Patents
Device and method for parallel processing of flue gas from garbage furnace and coal-fired furnace Download PDFInfo
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- CN113803737A CN113803737A CN202111249865.8A CN202111249865A CN113803737A CN 113803737 A CN113803737 A CN 113803737A CN 202111249865 A CN202111249865 A CN 202111249865A CN 113803737 A CN113803737 A CN 113803737A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 239000003546 flue gas Substances 0.000 title claims abstract description 77
- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 60
- 239000002910 solid waste Substances 0.000 claims abstract description 50
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 29
- 235000017550 sodium carbonate Nutrition 0.000 claims abstract description 29
- 239000007789 gas Substances 0.000 claims abstract description 20
- 239000008234 soft water Substances 0.000 claims abstract description 17
- 238000002485 combustion reaction Methods 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 39
- 239000000463 material Substances 0.000 claims description 33
- 239000003513 alkali Substances 0.000 claims description 27
- 230000003009 desulfurizing effect Effects 0.000 claims description 24
- 239000000428 dust Substances 0.000 claims description 18
- 239000002956 ash Substances 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 11
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 9
- 239000010881 fly ash Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 238000000746 purification Methods 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000460 chlorine Substances 0.000 abstract description 5
- 229910052801 chlorine Inorganic materials 0.000 abstract description 5
- 238000010344 co-firing Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 238000003672 processing method Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000006477 desulfuration reaction Methods 0.000 abstract 1
- 230000023556 desulfurization Effects 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000004056 waste incineration Methods 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006298 dechlorination reaction Methods 0.000 description 1
- 238000001784 detoxification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010784 textile waste Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Classifications
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- 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
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
-
- 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
- F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed
-
- 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
-
- 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
- F23G5/442—Waste feed arrangements
- F23G5/444—Waste feed arrangements for solid waste
-
- 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
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- 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
- F23J2215/00—Preventing emissions
- F23J2215/30—Halogen; 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
- F23J2215/00—Preventing emissions
- F23J2215/30—Halogen; Compounds thereof
- F23J2215/301—Dioxins; Furans
-
- 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
- F23J2217/104—High temperature resistant (ceramic) type
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Treating Waste Gases (AREA)
Abstract
一种垃圾炉与燃煤炉烟气并联处理装置及处理方法。现有技术单独焚烧还是共烧，烟气处理均为技术难点，单独焚烧时，需新建焚烧炉的原始投资、增加成本；共烧时，燃烧温度水平较高、氯的腐蚀危害十分明显。本发明组成包括：固废炉（1），固废炉的烟气口与分离器（2）连接，分离器的热灰口分别与返料器（3）、外置床（4）连接，分离器的烟气口与尾部烟道（5）连接，尾部烟道出口分别与燃煤炉（13）、脱硫塔（14）连接，尾部烟道内分别安装有喷雾器（12）、喷射器（18），喷雾器分别与碱液罐（7）、储气罐（11）连接，碱液罐通过输送机（8）与纯碱仓（9）连接，碱液罐与软水罐（6）连接。本发明用于垃圾炉与燃煤炉烟气并联处理装置。
A parallel processing device and processing method for the flue gas of a garbage furnace and a coal-fired furnace. In the prior art, separate incineration or co-firing, and flue gas treatment are all technical difficulties. In separate incineration, the original investment of a new incinerator is required and the cost is increased; in co-firing, the combustion temperature level is high, and the corrosion hazard of chlorine is very obvious. The composition of the invention includes: a solid waste furnace (1), a flue gas port of the solid waste furnace is connected with a separator (2), and a hot ash port of the separator is respectively connected with a return device (3) and an external bed (4), and the separation The flue gas port of the device is connected with the tail flue (5), the tail flue outlet is connected with the coal-fired furnace (13) and the desulfurization tower (14) respectively, and the tail flue is respectively equipped with a sprayer (12) and an injector (18) , the sprayer is respectively connected with the lye tank (7) and the gas storage tank (11), the lye tank is connected with the soda ash warehouse (9) through the conveyor (8), and the lye tank is connected with the soft water tank (6). The invention is used in a parallel processing device for the flue gas of a garbage furnace and a coal-fired furnace.
Description
Technical Field
The invention relates to the technical field of power station boilers and industrial boilers, in particular to a device and a method for treating flue gas of a garbage furnace and a coal-fired furnace in parallel.
Background
The clearing and transporting amount of Chinese domestic garbage and the production amount of industrial garbage rise year by year, the garbage has great harm to the environment, mainly manifested by land encroachment, atmosphere pollution, soil and water body pollution, and the caused harm is difficult to recover, the treatment principle of Chinese domestic garbage solid waste is reduction, resource utilization and harmlessness, for the parts with heat values in the domestic garbage and part of industrial garbage, such as paper, wood, plastics, textile waste, waste rubber leather and the like, the resource utilization of the waste can be realized while the problem of solid waste disposal is solved by adopting incineration technology; the solid waste incineration treatment has two modes, one mode uses a single incineration device, and the other mode adopts a co-firing technology, namely various power station boilers or industrial kilns are used for mixing and incinerating the waste and the solid waste;
at present, the prior art is mostly applied to producing building materials by coupling a coal-fired boiler with solid waste power generation and cooperatively processing solid waste by a cement kiln, and because the chlorine content in household garbage and combustible industrial garbage is generally high, the cement production has strict limitation on the chlorine content in raw materials, and the coal-fired boiler is mostly applied in the co-firing treatment of the combustible garbage solid waste;
in view of the higher chlorine content in the domestic garbage and the combustible industrial garbage, the flue gas treatment is a great technical difficulty no matter the domestic garbage and the combustible industrial garbage are separately incinerated or co-fired: when the single incineration is adopted, if a flue gas treatment system matched with incineration equipment is completely built, the original investment of the newly built incinerator is further improved, and the construction period is prolonged; when a coal-fired boiler is adopted for co-firing, the combustion temperature level is high, the corrosion hazard of chlorine is obvious, the comprehensive resource utilization of ash slag generated by coal combustion is not facilitated (particularly for a fluidized bed boiler), in addition, the slag and coking are easily caused by alkali metal in garbage, the solid waste mixed combustion amount of the coal-fired boiler is limited by the factors, and the coal-fired boiler is usually close to an industrial garbage generating enterprise, so that the development of a technical process for organically combining an independent combustion technology and the coal-fired boiler is of great significance for the disposal of solid waste of garbage, particularly combustible industrial garbage.
Disclosure of Invention
The invention aims to provide a device and a method for treating flue gas of a garbage furnace and a coal-fired furnace in parallel, which atomize Na2CO3 solution into a flue of a solid waste furnace, realize high-efficiency removal of acid gases such as HCl in the flue gas, and avoid corrosion to downstream flues and equipment.
The above purpose is realized by the following technical scheme:
a garbage furnace and coal-fired furnace flue gas parallel processing device comprises: solid waste furnace, the flue gas mouth and the separator of solid waste furnace are connected, the hot ash mouth of separator is connected with returning charge ware, external bed respectively, the flue gas mouth and the afterbody flue of separator are connected, afterbody flue export is connected with coal-fired furnace, desulfurizing tower respectively, afterbody flue in install atomizer, sprayer respectively, the atomizer respectively with lye tank, gas tank connection, lye tank pass through the conveyer and be connected with the soda ash bin, lye tank be connected with the soft water tank, the sprayer respectively with the active carbon storehouse gas tank connection, the gas tank connection air compressor machine.
The garbage furnace and coal-fired furnace flue gas parallel processing device, the material returning device and the external bed are respectively connected with the material returning port of the solid waste furnace, the desulfurizing tower is connected with the dust remover, and the dust remover is connected with the chimney.
A garbage furnace and coal-fired furnace flue gas parallel processing device and a processing method thereof comprise the following steps:
firstly, solid waste is incinerated in a solid waste furnace, generated flue gas enters a separator through a flue gas port arranged in the solid waste furnace, the flue gas is separated from large-particle fly ash, the separator is additionally provided with a hot ash port and a flue gas port, the separated fly ash enters a material returning device and an external bed through the hot ash port respectively, a high-temperature heating surface is arranged in the material returning device, hot ash exchanges heat with steam in the material returning device to improve the steam temperature and further improve the boiler efficiency, the material returning device is connected with an outlet of the external bed and is provided with a material returning port, and the hot ash returns to the solid waste furnace through the material returning port after staying for a certain time in the material returning device and the external bed for secondary combustion and material circulation;
the flue gas primarily purified by the separator enters a tail flue from a flue gas port, and an outlet of the tail flue and an outlet of the coal-fired furnace are both connected to an inlet of a desulfurizing tower, namely, the flue gas generated by the solid waste furnace and the coal-fired furnace enters the desulfurizing tower for desulfurizing and purifying, then enters a dust remover connected with the desulfurizing tower for dedusting and purifying, and finally is discharged into the atmosphere from a chimney;
the soda ash bin is connected with an alkali liquor tank through a conveyor, namely, waste soda ash in the soda ash bin is conveyed into an alkali liquor tank by the conveyor, the alkali liquor tank is simultaneously provided with a soft water inlet and an alkali liquor outlet, the soft water inlet is connected with the soft water tank, namely, soft water enters the alkali liquor tank to dissolve the waste soda ash to form alkali liquor, the alkali liquor outlet is connected with an alkali liquor channel of a sprayer, the sprayer is additionally provided with a high-pressure gas channel to be connected with a gas storage tank, compressed air from an air compressor is stored in the gas storage tank, namely, the compressed air breaks and atomizes the soda ash solution into small liquid drops in the sprayer, the gas storage tank is also connected with an injector inlet simultaneously with the activated carbon bin, namely, the compressed air is utilized to realize the injection of activated carbon particles;
the sprayer and the sprayer outlet are positioned in the tail flue, the sprayer outlet sprays out the atomized droplets of the soda ash solution, the HCl acid components generated by burning solid wastes in the flue gas are removed by using the soda ash solution, the activated carbon particles are sprayed out of the sprayer outlet to adsorb dioxin in the flue gas, and the dioxin is physically adsorbed by using the larger specific surface area of the activated carbon;
the flue gas is deacidified and detoxified and then is converged with the flue gas generated by the coal-fired furnace, and then further flue gas purification is completed through a desulfurizing tower and a dust remover matched with the coal-fired furnace, and finally the flue gas is emptied.
Has the advantages that:
1. the invention relates to a device for treating flue gas of a garbage furnace and a coal-fired furnace in parallel, which can atomize Na2CO3 solution to be sprayed into a flue of a solid waste furnace, realizes the high-efficiency removal of acid gases such as HCl in the flue gas, avoids the corrosion to a downstream flue and equipment, simultaneously sprays activated carbon particles into the flue, realizes the high-efficiency removal of dioxin in the flue gas, ensures that the emission of the dioxin reaches the standard, is incorporated into a flue gas purification system of the coal-fired boiler after dechlorination and detoxification of the flue gas, does not need related purification equipment of the solid waste furnace, reduces the original investment, shortens the construction period, and avoids influencing the comprehensive utilization of conventional ash residues of the coal-fired boiler.
According to the invention, the activated carbon particles are sprayed into the flue of the solid waste furnace, so that the dioxin in the flue gas can be efficiently removed, the toxicity in the flue gas is reduced, and the emission of the dioxin is ensured to reach the standard.
The flue gas is dechlorinated and detoxified and then is merged into a flue gas purification system of the coal-fired boiler, the original flue gas purification equipment of the coal-fired boiler can be utilized, the new construction of related equipment for a solid waste boiler is not needed, the original investment is reduced, the construction period is shortened, and meanwhile, the flue gas generated by solid waste incineration can be prevented from influencing the utilization of conventional ash generated by the coal-fired boiler.
The invention is not limited by the combination of the furnace types in the embodiment, and can also be applied to the combination of various solid waste incinerators and coal-fired boilers, and the application range is wider.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
Wherein: 1. the system comprises a solid waste furnace, 2, a separator, 3, a material returning device, 4, an external bed, 5, a tail flue, 6, a soft water tank, 7, an alkali liquor tank, 8, a conveyor, 9, a soda ash bin, 10, an air compressor, 11 air storage tanks, 12 sprayers, 13 coal-fired furnaces, 14 desulfurizing towers, 15 dust collectors, 16 chimneys, 17 activated carbon bins and 18 sprayers.
The specific implementation mode is as follows:
example 1:
a garbage furnace and coal-fired furnace flue gas parallel processing device comprises: solid waste furnace 1, the flue gas mouth and the separator 2 of solid waste furnace are connected, the hot grey mouth of separator is connected with returning glassware 3, external bed 4 respectively, the flue gas mouth and the afterbody flue 5 of separator are connected, the afterbody flue export is connected with coal-fired furnace 13, desulfurizing tower 14 respectively, the afterbody flue in install atomizer 12, sprayer 18 respectively, the atomizer be connected with lye tank 7, gas holder 11 respectively, lye tank pass through conveyer 8 and be connected with soda storehouse 9, lye tank and soft water tank 6 be connected, the sprayer respectively with activated carbon storehouse 17 the gas tank connection, gas tank connection air compressor machine 10.
Example 2:
according to the device for treating the flue gas of the garbage furnace and the coal-fired furnace in parallel in the embodiment 1, the material returning device and the external bed are respectively connected with the material returning port of the solid waste furnace, the desulfurizing tower is connected with the dust remover 15, and the dust remover is connected with the chimney 16.
Example 3:
the treatment method of the device for treating the flue gas of the garbage furnace and the coal-fired furnace in parallel according to the embodiment 1 or 2 comprises the following steps:
firstly, solid waste is incinerated in a solid waste furnace, generated flue gas enters a separator through a flue gas port arranged in the solid waste furnace, the flue gas is separated from large-particle fly ash, the separator is additionally provided with a hot ash port and a flue gas port, the separated fly ash enters a material returning device and an external bed through the hot ash port respectively, a high-temperature heating surface is arranged in the material returning device, hot ash exchanges heat with steam in the material returning device to improve the steam temperature and further improve the boiler efficiency, the material returning device is connected with an outlet of the external bed and is provided with a material returning port, and the hot ash returns to the solid waste furnace through the material returning port after staying for a certain time in the material returning device and the external bed for secondary combustion and material circulation;
the flue gas primarily purified by the separator enters a tail flue from a flue gas port, and an outlet of the tail flue and an outlet of the coal-fired furnace are both connected to an inlet of a desulfurizing tower, namely, the flue gas generated by the solid waste furnace and the coal-fired furnace enters the desulfurizing tower for desulfurizing and purifying, then enters a dust remover connected with the desulfurizing tower for dedusting and purifying, and finally is discharged into the atmosphere from a chimney;
the soda ash bin is connected with an alkali liquor tank through a conveyor, namely, waste soda ash (the main component is sodium carbonate) in the soda ash bin is conveyed into the alkali liquor tank by the conveyor, the alkali liquor tank is simultaneously provided with a soft water inlet and an alkali liquor outlet, the soft water inlet is connected with the soft water tank, namely, soft water enters the alkali liquor tank to dissolve the waste soda ash to form alkali liquor, the alkali liquor outlet is connected with an alkali liquor channel of a sprayer, the sprayer is additionally provided with a high-pressure air channel to be connected with an air storage tank, the air storage tank stores compressed air from an air compressor, namely, the compressed air breaks and atomizes the soda solution into small liquid drops in the sprayer, the air storage tank is also connected with an injector inlet simultaneously with the activated carbon bin, namely, the compressed air is utilized to realize the injection of activated carbon particles;
the sprayer and the sprayer outlet are positioned in the tail flue, the sprayer outlet sprays out the atomized liquid drops of the soda ash liquid, the acid components such as HCl generated by burning solid wastes in the flue gas are removed by using the soda ash liquid, and the main reaction equation is as follows:
the active carbon particles sprayed out of the outlet of the ejector adsorb dioxin in the flue gas, and the main principle is that the active carbon has a larger specific surface area to realize stronger physical adsorption of the dioxin;
deacidifying and detoxifying the flue gas, then converging the flue gas with the flue gas generated by the coal-fired furnace, then completing further flue gas purification through a desulfurizing tower and a dust remover matched with the coal-fired furnace, and finally emptying;
the alkali liquor tank, the sprayer and a passage through which the alkali liquor flows are made of corrosion-resistant materials;
the method can also adopt another treatment method, and the tail flue is directly connected to the inlet of the desulfurizing tower through the flue;
or, a dust remover is additionally arranged in the middle section of the flue connected between the tail flue and the desulfurizing tower, part of fly ash is returned to the activated carbon bin after being separated, and then the fly ash and fresh activated carbon are sprayed into the tail flue from an injector, so that the adsorption efficiency of the activated carbon and the deacidification efficiency of Na2CO3 are improved through circulation, and the material consumption of system operation can also be reduced. The dust remover can be any one of a bag-type dust remover, an electric dust remover and a cyclone separation dust remover;
the system can be further provided with related metering equipment to realize the online adjustment and fine control of the quality of the dissolved soda ash, the flow rate of the liquid flowing out and the feeding amount of the active carbon;
in the embodiment of the application, the solid waste furnace is a circulating fluidized bed boiler, and the coal-fired furnace is a pulverized coal boiler, but the structure can be applied to the combination of various solid waste incinerators and coal-fired boilers, such as a grate solid waste furnace + pulverized coal boiler, a rotary kiln solid waste incinerator + circulating fluidized bed boiler, a bubbling bed solid waste furnace + pulverized coal boiler and the like, and has a wide application range.
Claims (3)
1. A garbage furnace and coal-fired furnace flue gas parallel processing device comprises: solid waste furnace, characterized by: the flue gas mouth and the separator of solid useless stove are connected, the hot ash mouth of separator is connected with returning charge ware, external bed respectively, the flue gas mouth and the afterbody flue of separator are connected, afterbody flue export is connected with coal-fired furnace, desulfurizing tower respectively, afterbody flue in install atomizer, sprayer respectively, the atomizer respectively with lye tank, gas tank connection, lye tank pass through the conveyer and be connected with the soda ash storehouse, lye tank be connected with the soft water tank, the sprayer respectively with the active carbon storehouse gas tank connection, the gas tank connection air compressor machine.
2. The garbage furnace and coal-fired furnace flue gas parallel treatment device according to claim 1, which is characterized in that: the material returning device and the external bed are respectively connected with a material returning port of the solid waste furnace, the desulfurizing tower is connected with a dust remover, and the dust remover is connected with a chimney.
3. The method for treating the flue gas of the garbage furnace and the coal-fired furnace in parallel connection with the treatment device according to one of the claims 1 or 2, which is characterized in that: the method comprises the following steps:
firstly, solid waste is incinerated in a solid waste furnace, generated flue gas enters a separator through a flue gas port arranged in the solid waste furnace, the flue gas is separated from large-particle fly ash, the separator is additionally provided with a hot ash port and a flue gas port, the separated fly ash enters a material returning device and an external bed through the hot ash port respectively, a high-temperature heating surface is arranged in the material returning device, hot ash exchanges heat with steam in the material returning device to improve the steam temperature and further improve the boiler efficiency, the material returning device is connected with an outlet of the external bed and is provided with a material returning port, and the hot ash returns to the solid waste furnace through the material returning port after staying for a certain time in the material returning device and the external bed for secondary combustion and material circulation;
the flue gas primarily purified by the separator enters a tail flue from a flue gas port, and an outlet of the tail flue and an outlet of the coal-fired furnace are both connected to an inlet of a desulfurizing tower, namely, the flue gas generated by the solid waste furnace and the coal-fired furnace enters the desulfurizing tower for desulfurizing and purifying, then enters a dust remover connected with the desulfurizing tower for dedusting and purifying, and finally is discharged into the atmosphere from a chimney;
the soda ash bin is connected with an alkali liquor tank through a conveyor, namely, waste soda ash in the soda ash bin is conveyed into an alkali liquor tank by the conveyor, the alkali liquor tank is simultaneously provided with a soft water inlet and an alkali liquor outlet, the soft water inlet is connected with the soft water tank, namely, soft water enters the alkali liquor tank to dissolve the waste soda ash to form alkali liquor, the alkali liquor outlet is connected with an alkali liquor channel of a sprayer, the sprayer is additionally provided with a high-pressure gas channel to be connected with a gas storage tank, compressed air from an air compressor is stored in the gas storage tank, namely, the compressed air breaks and atomizes the soda ash solution into small liquid drops in the sprayer, the gas storage tank is also connected with an injector inlet simultaneously with the activated carbon bin, namely, the compressed air is utilized to realize the injection of activated carbon particles;
the sprayer and the sprayer outlet are positioned in the tail flue, the sprayer outlet sprays out the atomized droplets of the soda ash solution, the HCl acid components generated by burning solid wastes in the flue gas are removed by using the soda ash solution, the activated carbon particles are sprayed out of the sprayer outlet to adsorb dioxin in the flue gas, and the dioxin is physically adsorbed by using the larger specific surface area of the activated carbon;
the flue gas is deacidified and detoxified and then is converged with the flue gas generated by the coal-fired furnace, and then further flue gas purification is completed through a desulfurizing tower and a dust remover matched with the coal-fired furnace, and finally the flue gas is emptied.
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