CN206444401U - A kind of flying dust flue gas combination purification system for burning city domestic garbage - Google Patents
A kind of flying dust flue gas combination purification system for burning city domestic garbage Download PDFInfo
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- CN206444401U CN206444401U CN201720147855.6U CN201720147855U CN206444401U CN 206444401 U CN206444401 U CN 206444401U CN 201720147855 U CN201720147855 U CN 201720147855U CN 206444401 U CN206444401 U CN 206444401U
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Abstract
The utility model discloses a kind of flying dust flue gas combination purification system for burning city domestic garbage, including spray cooling tower, blender, sack cleaner, incinerator, First Heat Exchanger, SCR denitration system, the second heat exchanger wet desulphurization tower, the active carbon adsorber being sequentially connected.Waste gas after the utility model denitration enters back into wet desulphurization tower, and wet desulphurization tower mainly purifies sulfur dioxide；Proceed immediately to active carbon adsorber, active carbon adsorber is directed to You Li bioxin a small amount of in tail gas, bioxin particulate in tail gas is adsorbed using the huge specific surface area and microcellular structure of activated carbon, so as to realize thorough purification, finally by blower fan, complete gas will thoroughly be purified by blower fan it is incorporated into aiutage and reaches, discharged by aiutage mark, after the completion of the technique of technical scheme, tail gas from incinerator performs the newest relevant criterion on danger wastes discharged in burning, meets the requirement of law.
Description
Technical field
The utility model is related to the purified treatment field of incineration treatment of garbage, and in particular to one kind is used for domestic waste
The flying dust flue gas combination purification system of burning.
Background technology
Garbage flying ash is mainly derived from the dust produced after incineration treatment of garbage.The mode of flying dust disposal has a lot, at present
What is generally used has 4 kinds：Burning, cement solidification, chemical agent stabilisation, acid solution extraction etc..The U.S., Germany and Japan etc. are sent out
Incineration treatment technology is most praised highly by environmental administration up to country.Because the technology can not only make lime-ash volume reduction more than 2/3, mitigate
The burden of land used is filled, the valuable metal in lime-ash can also be reclaimed, the harmful substances such as bioxin are decomposed, therefore waste incineration flies
Grey treatment technology has become one of focus of research, incineration slag may be used as filling out hole, build up fields or refuse landfill earthing material
Material etc. is used.However, inevitably burn will produce mainly contained in incineration flue gas, flying dust incineration flue gas dust,
Sulfur dioxide, carbon monoxide, bioxin, nitrogen oxides, other heavy metals of ammonia and compound etc..Due to the concentration of carbon monoxide
High, dioxin concentration is high, content of beary metal is high, while also containing acid ingredients, existing waste incineration such as hydrogen chloride, hydrogen fluoride
The means such as SNCR+ charcoal absorptions+sack cleaner that waste gas is used can not realize preferable treatment effeciency, it is difficult to row up to standard
Put.
Utility model content
The purpose of this utility model is to provide a kind of flying dust flue gas combination purification system for burning city domestic garbage
System, solves not to be directed to the purification scheme of the flying dust flue gas of burning city domestic garbage in the prior art, completes after waste incineration
Specific aim subsequent treatment the problem of.
The utility model is achieved through the following technical solutions：
A kind of flying dust flue gas combination purification system for burning city domestic garbage, including the misting cooling being sequentially connected
Tower, blender, sack cleaner, incinerator, SCR denitration system, wet desulphurization tower, active carbon adsorber, wherein：
Spray cooling tower：Flying dust waste gas from incinerator enters from the bottom of spray cooling tower, from the top of spray cooling tower after cooling
Portion flows out into blender；
Blender：Active carbon powder is sufficiently mixed with the waste gas after cooling using compressed air, two in absorption waste gas
Evil English, then into sack cleaner；
Sack cleaner：Active carbon powder and dust in mixed gas is filtered out, the waste gas after dedusting, which enters, to be burnt
Burn furnace bottom；
Incinerator：Waste gas after dedusting is burned, the carbon monoxide in waste gas is eliminated, waste gas after burning is from burning
The output of furnace roof portion enters SCR denitration system；
SCR denitration system：It is used as reducing agent by spraying into ammonia spirit by the use of SCR catalyst, the NOx in waste gas is reduced
Into nitrogen；Then the bottom for entering wet desulphurization tower is exported from SCR denitration system bottom；
Wet desulphurization tower：Desulfurization is carried out to the gas after denitration, the sulfur dioxide in gas is eliminated, then from wet type desulfurizing
The top output of tower enters active carbon adsorber；
Active carbon adsorber：After You Li bioxin in adsorbed gas, aiutage is introduced by the effect of blower fan and arranged
Put.
The utility model is the reasonable processing system set for burning city domestic garbage, existing four kinds of flying dusts disposal
Mode is not fully solved its follow-up pollution problem actually, while its utilization rate is relatively low, applicant passes through to flying dust
For many years research and waste incineration project research, have devised the technical scheme of the application：Flue gas after flying dust is burned leads to
Enter misting cooling tower bottom, spray cooling tower reduction flue-gas temperature plays a protective role to follow-up equipment；Enter back into mixing
Active carbon powder, is transported in blender and is sufficiently mixed by device using compressed air, to adsorb bioxin in waste gas；So
Enter sack cleaner afterwards, received the dust being adsorbed with the active carbon powder and former flue gas of bioxin using sack cleaner
Collection, the activated carbon powder and dust collected through sack cleaner is directly entered agglomerating plant as hazardous waste and burned, and will not produce
The problem of secondary pollution is remarketed；Incinerator is entered back into, incinerator is mainly net to the carbon monoxide progress depth in waste gas
Change, by carbonic oxide exhaustive oxidation into harmless objects such as carbon dioxide packings；Waste gas after burning enters back into SCR denitration system, SCR denitration
System is used as reducing agent by the use of special SCR catalyst primarily directed to NOx in waste gas by spraying into ammonia spirit, by waste gas
In NOx be reduced into nitrogen, reaction temperature is at 350~400 DEG C；Waste gas after denitration enters back into wet desulphurization tower, wet type desulfurizing
Tower mainly purifies sulfur dioxide, by adding certain density sodium hydroxide in circulated sprinkling liquid, utilizes circulated sprinkling liquid
Alkalescence, realizes the purpose of desulfurization；Proceed immediately to active carbon adsorber, active carbon adsorber is directed to a small amount of free two in tail gas
Evil English, is adsorbed bioxin particulate in tail gas using the huge specific surface area and microcellular structure of activated carbon, so as to realize thoroughly
Purification, finally by blower fan, thoroughly purifying complete gas by blower fan, to be incorporated into aiutage up to standard, is arranged by aiutage
Put, after the completion of the technique of technical scheme, tail gas from incinerator performs newest on danger wastes discharged in burning
Relevant criterion, meet the requirement of law.
The output gas of the incinerator also carries out heat exchange drop before SCR denitration system is entered by First Heat Exchanger
Temperature；The output gas of SCR denitration system also carries out heat exchange cooling before wet desulphurization tower is entered by the second heat exchanger.Enter one
Step is said, in order to reduce overall energy consumption, is improved heat utilization ratio, is reduced the influence to environment, the technical scheme of the application is done
It is further to improve, the heat in waste gas is returned by increasing a First Heat Exchanger in incinerator and SCR denitration system
Receive, incineration flue gas from original 700 DEG C can be cooled to 380 DEG C by heat exchanger by First Heat Exchanger, reduce resource wave
Take and to the recycling of resource；Then second heat exchanger is increased between SCR denitration system and wet desulphurization tower, to cigarette
Gas is cooled, and saves most of energy consumption, while quickly being reduced the temperature of flue gas by exchanging heat, so as to avoid bioxin
, being capable of the row of avoiding by the flue gas after the smoke pre-heating wet desulphurization denitrating tower after SCR denitration system in the temperature range of synthesis
The white haze of smoke stack emission.
Described wet desulphurization tower includes being separated into by two air distribution plates inside the internal tower body for cavity structure, tower body
Portion removes fog-zone, the spraying zone at middle part, the circulation liquid zone of bottom, and ceramics are formed filled with ceramic packing in top is except fog-zone
Demisting layer, middle part spraying zone at least provided with two layers of shower, one layer of pottery is provided between the shower of adjacent two layers
Porcelain Pall ring filler formation corrosion-resistant filling layer, bottom circulation liquid zone as circulating cooling liquid storage region.Concretely,
Present inventor has done further transformation and optimization to wet desulphurization tower, by setting two air distribution plates in tower body,
The internal cavities of tower body are separated to form three spaces：Lower cavity is as the storage location of coolant, and waste gas is first from tower body
Lower cavity enter, then carry out gas distribution effect by the through hole on air distribution plate, by the waste gas of entrance equably from bottom to top
Cooled region is entered, by setting two layers or more than two layers of shower, waste gas is after the shower of bottom, by one
Layer is filled the corrosion-resistant filling layer formed by ceramic Pall ring filler, can further be increased gas liquid interfacial area, be greatly improved
The efficiency of spray desulphurization denitration, then enters back into after next layer of spray cleaning, repeatedly so 1-4 time, can reach efficient
The purpose of purification, the waste gas after purification, after the demisting layer at top, in the gas containing more water smoke, the larger water of molecule
Mist can hit ceramic packing formation drop, so that the purpose of demisting is reached, until during tower top, meeting emission request.
The utility model compared with prior art, has the following advantages and advantages：
1st, a kind of flying dust flue gas combination purification system for burning city domestic garbage of the utility model, flying dust is burned
Flue gas afterwards is passed through misting cooling tower bottom, and spray cooling tower reduction flue-gas temperature plays a protective role to follow-up equipment；Enter again
Enter to blender, active carbon powder is transported in blender using compressed air and is sufficiently mixed, to adsorb in waste gas
Bioxin；Subsequently into sack cleaner, it will be adsorbed with using sack cleaner in the active carbon powder and former flue gas of bioxin
Dust collection, the activated carbon powder and dust collected through sack cleaner as hazardous waste be directly entered agglomerating plant burn,
The problem of secondary pollution is remarketed will not be produced；Incinerator is entered back into, incinerator mainly enters to the carbon monoxide in waste gas
Row deep purifying, by carbonic oxide exhaustive oxidation into harmless objects such as carbon dioxide packings；Waste gas after burning enters back into SCR denitration system
System, SCR denitration system is used as reduction by the use of special SCR catalyst primarily directed to NOx in waste gas by spraying into ammonia spirit
Agent, is reduced into nitrogen, reaction temperature is at 350~400 DEG C, and the waste gas after denitration enters back into wet desulphurization tower by the NOx in waste gas,
Wet desulphurization tower mainly purifies sulfur dioxide, by adding certain density sodium hydroxide in circulated sprinkling liquid, utilizes circulation
The alkalescence of spray liquid, realizes the purpose of desulfurization；Active carbon adsorber is proceeded immediately to, active carbon adsorber is directed to a small amount of in tail gas
You Li bioxin, bioxin particulate in tail gas is adsorbed using the huge specific surface area and microcellular structure of activated carbon so that
Thoroughly purification is realized, finally by blower fan, thoroughly purifying complete gas by blower fan, to be incorporated into aiutage up to standard, passes through row
Inflator is discharged, after the completion of the technique of technical scheme, and tail gas from incinerator execution is newest to burn on danger wastes
The relevant criterion of discharge is burnt, meets the requirement of law；
2nd, a kind of flying dust flue gas combination purification system for burning city domestic garbage of the utility model, is changed by first
Incineration flue gas from original 700 DEG C can be cooled to 380 DEG C by hot device by heat exchanger, reduce the wasting of resources and to resource
Recycle；Then increase by second heat exchanger between SCR denitration system and wet desulphurization tower, flue gas is cooled, save
Most of energy consumption is saved, while quickly reducing the temperature of flue gas by exchanging heat, so as to avoid temperature of the bioxin in synthesis
Interval, the white of smoke evacuation chimney discharge can be avoided by the flue gas after the smoke pre-heating wet desulphurization denitrating tower after SCR denitration system
Mist；
3rd, a kind of flying dust flue gas combination purification system for burning city domestic garbage of the utility model, sets in tower body
Two air distribution plates are put, the internal cavities of tower body are separated to form three spaces：Lower cavity is given up as the storage location of coolant
Gas enters from the lower cavity of tower body first, then carries out gas distribution effect by the through hole on air distribution plate, and the waste gas of entrance is equal
Cooled region is entered from bottom to top evenly, by setting two layers or more than two layers of shower, spray of the waste gas Jing Guo bottom
After shower pipe, the corrosion-resistant filling layer formed is filled by ceramic Pall ring filler by one layer, can further increase gas-liquid contact
Area, substantially increases the efficiency of spray desulphurization denitration, then enters back into after next layer of spray cleaning, repeatedly so 1-4 times,
The purpose of high-efficient purification can be reached, the waste gas after purification, after the demisting layer at top, in the gas containing more water smoke,
The larger water smoke of molecule can hit ceramic packing formation drop, so that the purpose of demisting is reached, until during tower top, meeting discharge will
Ask.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the utility model embodiment, constitutes the one of the application
Part, does not constitute the restriction to the utility model embodiment.In the accompanying drawings：
Fig. 1 is 90 ° of principle schematics of the utility model counterclockwise rotates；
Fig. 2 is the half-sectional structural representation of the utility model wet desulphurization tower.
Mark and corresponding parts title in accompanying drawing：
1- spray cooling towers, 2- blenders, 3- sack cleaners, 4- incinerators, 5- First Heat Exchangers, 6-SCR denitrations system
System, the heat exchangers of 7- second, 8- wet desulphurization towers, 9- active carbon adsorbers, 10- blower fans, 11- aiutages, 801- tower bodies, 802- cloth
Gas plate, 803- showers, 804- corrosion-resistant fillings layer, 805- ceramics demisting layers, 806- coolants.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, with reference to embodiment to this reality
It is described in further detail with new, exemplary embodiment of the present utility model and its explanation are only used for explaining that this practicality is new
Type, is not intended as limiting of the present utility model.
Embodiment
As shown in Fig. 1 to 2, a kind of flying dust flue gas combination purification system for burning city domestic garbage of the utility model
System, including spray cooling tower 1, blender 2, sack cleaner 3, incinerator 4, First Heat Exchanger 5, SCR denitration system 6, second
Heat exchanger 7, wet desulphurization tower 8, active carbon adsorber 9, first, the flue gas after flying dust is burned are passed through the bottom of spray cooling tower 1, spray
Fog cooling tower 1 reduces flue-gas temperature, and follow-up equipment is played a protective role；Flowed out simultaneously from the top of spray cooling tower 1 after cooling
Into blender 2, active carbon powder is transported in blender using compressed air and is sufficiently mixed, to adsorb in waste gas
Bioxin；Subsequently into sack cleaner 3, it will be adsorbed with using sack cleaner in the active carbon powder and former flue gas of bioxin
Dust collection, the activated carbon powder and dust collected through sack cleaner as hazardous waste be directly entered agglomerating plant burn,
The problem of secondary pollution is remarketed will not be produced；Incinerator 4 is entered back into, incinerator 4 is mainly to the carbon monoxide in waste gas
Deep purifying is carried out, by carbonic oxide exhaustive oxidation into harmless objects such as carbon dioxide packings；Waste gas after burning passes through First Heat Exchanger 5
Heat in waste gas is reclaimed, incineration flue gas can be dropped from original 700 DEG C by heat exchanger by First Heat Exchanger 5
Temperature reduces the wasting of resources and the recycling to resource to 380 DEG C；380 DEG C of waste gas enters back into SCR denitration system 6, and SCR takes off
Nitre system 6 is used as reducing agent by the use of special SCR catalyst primarily directed to NOx in waste gas by spraying into ammonia spirit, will be useless
NOx in gas is reduced into nitrogen, and reaction temperature is at 350~400 DEG C, and the waste gas after denitration is cooled by the second heat exchanger 7,
Most of energy consumption is saved, while quickly reducing the temperature of flue gas by exchanging heat, so as to avoid temperature of the bioxin in synthesis
Degree is interval, can avoid what smoke evacuation chimney was discharged by the flue gas after the smoke pre-heating wet desulphurization denitrating tower after SCR denitration system
White haze；Wet desulphurization tower 8 is entered back into after waste gas heat exchange cooling after denitration, wet desulphurization tower 8 is included in tower body 801, tower body 801
Two air distribution plates 802 are set, the internal cavities of tower body 801 are separated to form three spaces：Lower cavity is used as coolant 806
Storage location, waste gas enters from the lower cavity of tower body 801 first, then carries out gas distribution work by the through hole on air distribution plate 802
With the waste gas of entrance is equably entered into cooled region from bottom to top, passes through and sets two layers or more than two layers of shower
803, after shower 803 of the waste gas by bottom, the corrosion-resistant filling formed is filled by ceramic Pall ring filler by one layer
Layer 804, can further increase gas liquid interfacial area, substantially increase the efficiency of spray cleaning, then enter back into next layer
Spray cleaning, after so repeatedly 1-4 times, can reach the purpose of cooling, the waste gas after purification, pass through the ceramic demisting layer at top
After 805, in the gas containing more water smoke, the larger water smoke of molecule can hit ceramic packing formation drop, so as to reach demisting
Purpose, until during tower top, meet emission request, the main purification sulfur dioxide of wet desulphurization tower 8, by circulated sprinkling liquid
Certain density sodium hydroxide is added, using the alkalescence of circulated sprinkling liquid, the purpose of desulfurization is realized；Proceed immediately to activated carbon suction
Adnexa 9, active carbon adsorber 9 is directed to You Li bioxin a small amount of in tail gas, utilizes the huge specific surface area and micropore of activated carbon
Structure adsorbs bioxin particulate in tail gas, so that thorough purification is realized, will be thorough by blower fan 10 finally by blower fan 10
Purify complete gas and be incorporated into aiutage 11, discharged by aiutage 11, through experimental examination, tail gas from incinerator performs newest
On the relevant criterion of danger wastes discharged in burning, meet the requirement of law.
Above-described embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect
One step is described in detail, be should be understood that and be the foregoing is only embodiment of the present utility model, is not used to limit
Fixed protection domain of the present utility model, all any modifications within spirit of the present utility model and principle, made, is equally replaced
Change, improve, should be included within protection domain of the present utility model.
Claims (3)
1. a kind of flying dust flue gas combination purification system for burning city domestic garbage, it is characterised in that including what is be sequentially connected
Spray cooling tower (1), blender (2), sack cleaner (3), incinerator (4), SCR denitration system (6), wet desulphurization tower (8),
Active carbon adsorber (9), wherein：
Spray cooling tower (1)：Flying dust waste gas from incinerator enters from the bottom of spray cooling tower (1), from spray cooling tower (1) after cooling
Top flow out into blender (2)；
Blender (2)：Active carbon powder is sufficiently mixed with the waste gas after cooling using compressed air, bis- Evil in absorption waste gas
English, then into sack cleaner (3)；
Sack cleaner (3)：Active carbon powder and dust in mixed gas is filtered out, the waste gas after dedusting, which enters, to be burned
Stove (4) bottom；
Incinerator (4)：Waste gas after dedusting is burned, the carbon monoxide in waste gas is eliminated, waste gas after burning is from burning
Output enters SCR denitration system (6) at the top of stove (4)；
SCR denitration system (6)：It is used as reducing agent by spraying into ammonia spirit by the use of SCR catalyst, the NOx in waste gas is reduced
Into nitrogen, the bottom for entering wet desulphurization tower (8) is then exported from SCR denitration system (6) bottom；
Wet desulphurization tower (8)：Desulfurization is carried out to the gas after denitration, the sulfur dioxide in gas is eliminated, then from wet type desulfurizing
The top output of tower (8) enters active carbon adsorber (9)；
Active carbon adsorber (9)：After You Li bioxin in adsorbed gas, aiutage (11) is introduced by the effect of blower fan (10)
Discharged.
2. a kind of flying dust flue gas combination purification system for burning city domestic garbage according to claim 1, it is special
Levy and be, the output gas of the incinerator (4) is also entered before SCR denitration system (6) is entered by First Heat Exchanger (5)
Row heat exchange cooling；The output gas of SCR denitration system (6) also passes through the second heat exchanger (7) before wet desulphurization tower (8) is entered
Carry out heat exchange cooling.
3. a kind of flying dust flue gas combination purification system for burning city domestic garbage according to claim 1, it is special
Levy and be：Described wet desulphurization tower (8) includes the internal tower body (801) for cavity structure, and tower body (801) is internal by two cloth
Gas plate (802) be separated into top remove fog-zone, the spraying zone at middle part, the circulation liquid zone of bottom, top remove fog-zone in fill
There is ceramic packing to form ceramic demisting layer (805), middle part spraying zone at least provided with two layers of shower, in adjacent two layers
It is provided with one layer of ceramic Pall ring filler formation corrosion-resistant filling layer (804) between shower, the circulation liquid zone of bottom is as following
The storage region of ring coolant (806).
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