CN104263413B - Method for realizing zero emission of dioxin during preparation of fuel gas with household garbage and device for implementing method - Google Patents
Method for realizing zero emission of dioxin during preparation of fuel gas with household garbage and device for implementing method Download PDFInfo
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- CN104263413B CN104263413B CN201410542927.8A CN201410542927A CN104263413B CN 104263413 B CN104263413 B CN 104263413B CN 201410542927 A CN201410542927 A CN 201410542927A CN 104263413 B CN104263413 B CN 104263413B
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- 238000000034 method Methods 0.000 title claims abstract description 68
- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 37
- 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 title claims abstract 15
- 239000002737 fuel gas Substances 0.000 title abstract description 7
- 238000002360 preparation method Methods 0.000 title abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 137
- 239000007789 gas Substances 0.000 claims abstract description 78
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 239000000428 dust Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000000926 separation method Methods 0.000 claims abstract description 18
- 239000000567 combustion gas Substances 0.000 claims description 60
- 238000002309 gasification Methods 0.000 claims description 43
- 239000002904 solvent Substances 0.000 claims description 27
- 235000019738 Limestone Nutrition 0.000 claims description 20
- 239000006028 limestone Substances 0.000 claims description 20
- 238000001179 sorption measurement Methods 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 14
- 229910015372 FeAl Inorganic materials 0.000 claims description 12
- 238000009835 boiling Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 4
- 239000007791 liquid phase Substances 0.000 claims description 3
- 239000012071 phase Substances 0.000 claims 1
- 238000001914 filtration Methods 0.000 abstract description 17
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 4
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000004571 lime Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000843 powder Substances 0.000 abstract description 2
- 239000002912 waste gas Substances 0.000 abstract description 2
- KVGZZAHHUNAVKZ-UHFFFAOYSA-N 1,4-Dioxin Chemical compound O1C=COC=C1 KVGZZAHHUNAVKZ-UHFFFAOYSA-N 0.000 description 103
- 230000008569 process Effects 0.000 description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 11
- 239000003546 flue gas Substances 0.000 description 11
- 239000000460 chlorine Substances 0.000 description 9
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 8
- 229910052801 chlorine Inorganic materials 0.000 description 8
- 239000002250 absorbent Substances 0.000 description 7
- 230000002745 absorbent Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000003610 charcoal Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 150000002013 dioxins Chemical class 0.000 description 4
- 238000000197 pyrolysis Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000010849 combustible waste Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010410 dusting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 210000001589 microsome Anatomy 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 150000004816 dichlorobenzenes Chemical class 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000003987 high-resolution gas chromatography Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
- C10J3/60—Processes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0946—Waste, e.g. MSW, tires, glass, tar sand, peat, paper, lignite, oil shale
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0959—Oxygen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0983—Additives
- C10J2300/0996—Calcium-containing inorganic materials, e.g. lime
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1603—Integration of gasification processes with another plant or parts within the plant with gas treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to the field of treatment of waste gases during preparation of fuel gas with household garbage, particularly to a method for realizing zero emission of dioxin during preparation of the fuel gas with the household garbage and a device for implementing the method. The method comprises steps as follows: the garbage and lime powder are gasified and incinerated at the high temperature, and dust is removed from produced gases at the high temperature; the gases with the dust removed are firstly filtered by fat-loaded activated carbon and then subjected to gas-liquid separation after being cooled; or the gases with the dust removed are firstly subjected to gas-liquid separation and then filtered by the fat-loaded activated carbon respectively after being cooled, the collected gases are fuel gas, and the liquid is condensate water; the fat-loaded activated carbon after filtration is recovered to be gasified and incinerated. With the adoption of the method, the emission of the dioxin can be avoided during incineration and dust removal; the gases with the dust removed are directly filtered by the fat-loaded activated carbon or filtered by the fat-loaded activated carbon after gas-liquid separation after being cooled, so that the dioxin is removed, and the zero emission of the dioxin is realized. The device is simple, good in dioxin zero emission effect, low in energy consumption and low in cost.
Description
Technical field
The present invention relates to the exhaust-gas treatment field in house refuse combustion gas, in particular to a kind of house refuse system
The method of dioxin zero discharge and its device in combustion gas.
Background technology
The burning of house refuse brings serious environmental pollution, and dioxin is main pollutant.Conventional garbage burns
Burn factory technique be：Rubbish is placed in incinerator and fully burns, be i.e. C+O2=CO2Heat release, the heat obtaining is given birth to waste heat boiler
Produce superheated steam, this steam supplies unit generation；The burn away the refuse waste gas of generation of incinerator enters from chimney in the air.
In burning process, temperature reaches 270 DEG C and decomposites chlorine (Cl plastics2) and phenyl ring, the hydrogen in Benzene Molecule is former
Son generates dioxin after being replaced by chlorine atoms.Therefore, waste incineration in-furnace temperature reaches 270 DEG C of dioxin and starts to generate.To 500
DEG C dioxin does not regenerate, 705 DEG C it start to decompose, 850 DEG C of delays are decomposed for 2 seconds completely.When temperature be reduced to 500 DEG C with
Under, due to phenyl ring and chlorine (Cl2) all exist, dioxin starts to recombine again.
National Specification is pressed in the dedusting of conventional garbage incineration plant, can only take bag-type dusting, the filter bag of bag-type dusting,
High temperature resistant greatly be 220 DEG C, generally 170-190 DEG C.And dioxin generates that is to say, that dedusting temperature is less than below 500 DEG C
500 DEG C it is possible to have dioxin to generate, the dust that deduster is collected will be by dioxin contamination.
In order to reduce the generation of dioxin, existing process, when flue gas is cooled to below 500 DEG C, takes spray cold water to make flue gas
Chilling, shortens dioxin the 500-270 DEG C of time synthesizing again, to reduce synthesizing again of dioxin according to this.Although this measure
Dioxin synthetic quantity again can accordingly be reduced, but dioxin can not be suppressed and do not synthesize completely, still can not accomplish the zero-emission of dioxin
Put.
Additionally, the constant high temperature before Application No. 201410282868.5 discloses a kind of garbage-incineration smoke purifying is processed
Device, using before garbage-incineration smoke purifying, carry out certain period of time pyrolytic process process, remove flue gas
Middle dioxin composition；Application No. 201410199811.9 discloses a kind of domestic garbage resource innocuity disposal system, adopts
There are hot blast and biogas combustion-supporting with incinerator, furnace temperature is high, burning completely, can make dioxin crack, and both approaches are all using high
The mode of anneal crack solution processes dioxin, and this method is not only high to equipment requirement, and processing procedure high energy consumption increased cost, and
And when flue gas is down to below 500 DEG C, dioxin recombines, it is bonded at after synthesis and discharges from chimney on dust, dioxin can not
Can zero-emission.
Application No. 201410281073.2 discloses a kind of combustible waste directional thermal decomposition method, is to carry for pyrolytic technique
A kind of new technique scheme going out, improves pyrolysis efficiency and the utilization rate of combustible waste, but, dioxin is in 0.1ng/
Nm3Hereinafter, the zero-emission of dioxin can not be accomplished.
Application No. 201410235174.6 discloses the method for dioxin and its device in a kind of removing high-temperature flue gas, first
First the flue gas after UTILIZATION OF VESIDUAL HEAT IN and chilling is removed flying dust through the first cleaner；Then pass to the dioxin containing absorbent to inhale
Receive tower, the dioxin in absorption and separation flue gas；It is passed through the absorbent dust that the second cleaner removes in flue gas again, after purification
Fume emission, reaches the absorbent of saturation absorption in the absorbent dust that reclaim the second cleaner and dioxins adsorption tower
All send into absorbent and reclaim reactor, and input ozone reaction and decompose dioxin, the absorbent purifying is sent into dioxin and absorbs
Tower, recycles.The method is that absorbent absorption dioxin and ozone are promoted being combined together of catalytic decomposition of dioxins, takes off
Except the not only complex process of the dioxin in high-temperature flue gas, high cost, and " flue gas after UTILIZATION OF VESIDUAL HEAT IN and chilling is removed through first
Dirt equipment remove flying dust ", this flying dust of collection by dioxin contamination because the flue gas after UTILIZATION OF VESIDUAL HEAT IN and chilling is low
In 500 DEG C that dioxin recombines of temperature, dioxin can not possibly zero-emission.
In recent years, developed country gradually develop the pyrolysis of rubbish and gasification technology come more effectively, more safely to rubbish
Rubbish carries out recycling treatment.Pyrolysis and evaporating method are that organic matter is heated to 450 DEG C～750 DEG C, make the change of compound with heat energy
Close bond fission, larger molecular organicses are changed into the process of the fuel gas, liquid fuel and remaining semicoke of small molecule.By rubbish
The rubbish of solid-state is changed into gaseous synthesis gas by gasification, and convenient transport and storage are so that the value of rubbish has obtained very
Big lifting.And during being somebody's turn to do, how to remove the dioxin producing in Refuse Incineration Process is a huge challenge.
Content of the invention
It is an object of the invention to provide the method for dioxin zero discharge and its device in a kind of house refuse combustion gas, with
Solve the problems, such as above-mentioned.
The method providing dioxin zero discharge in a kind of house refuse combustion gas in an embodiment of the present invention, including with
Lower step：
Rubbish and pulverized limestone are carried out gasification burning at not less than 710 DEG C, the gas of generation is in the height not less than 705 DEG C
The lower dedusting of temperature；
Gas after dedusting is cooled to less than 74 DEG C, carries out gas-liquid separation, and detached gas is combustion gas, and liquid is condensation
Water；
Wherein, the gas after cooling is filtered or by the gas after gas-liquid separation and liquid respectively through carrying through carrying fat activated carbon
Fat activated carbon filters.
Preferably, the load fat activated carbon after filtering is reclaimed, carry out gasification burning together with rubbish and pulverized limestone.
Preferably, the temperature of described gasification burning is 710-1050 DEG C, preferably 850-1000 DEG C.
Preferably, the temperature of dedusting is 705-725 DEG C, preferably 705-710 DEG C.
Preferably, the gas after dedusting is cooled to 25-70 DEG C, preferably 35-45 DEG C.
Preferably, described load fat activated carbon is prepared by following methods：
Fat is loaded into activated carbon capillary after being dissolved by the solvent, and is then heated to solvent boiling point, and solvent volatilizees, and fat is active
Charcoal micropore holds and stays in micropore.
Present invention also offers implement above-mentioned house refuse combustion gas in dioxin zero discharge method device, including according to
The secondary gasification furnace being connected by pipeline, air-valve, high temperature resistant cyclone dust collectors, heat exchanger, air-introduced machine, gas-liquid separator；
Additionally, also including load fat adsorption box or the gas with gas-liquid separator being arranged between heat exchanger and gas-liquid separator
The load fat adsorption box connecting respectively on the pipeline mutually exporting and on the pipeline of liquid-phase outlet.
Preferably, it is also associated with the high temperature resistant separation of FeAl film between described high temperature resistant cyclone dust collectors and described heat exchanger
Device.
Preferably, particle diameter is more than 0.3 μm of particle and separates by the high temperature resistant separator of described FeAl film.
Preferably, described heat exchanger is more than 1, preferably 2.
Preferably, described heat exchanger includes a convection bank heat exchanger or plate type heat exchanger and a pipe shell type heat exchange
Device；
Temperature is reduced to 140-300 DEG C by described convection bank heat exchanger or plate type heat exchanger, preferably 140-180 DEG C；
Temperature is reduced to 25-70 DEG C by described shell-and-tube heat exchanger, preferably 35-45 DEG C.
The method of dioxin zero discharge in house refuse combustion gas provided in an embodiment of the present invention, burns rubbish at high temperature
Rubbish, and to dedusting under the gas high temperature obtaining, during being somebody's turn to do, do not have the discharge of dioxin；Dioxin boiling point is 75 DEG C, dedusting
Gas afterwards is cooled to less than 74 DEG C, and dioxin becomes particulate, but water insoluble, and the dioxin of particulate is through overload fat activity
Charcoal filter, dioxin particulate along carry fat activated carbon wash away and be melted into carry fat activated carbon capillary fat in, thus realize combustion gas and
Zero content of the dioxin in the condensed water of discharge.Finally the load fat activated carbon after filtering is reclaimed, with rubbish and pulverized limestone one
Rise and carry out high-temperature gasification burning, dioxin high-temp combustion decomposites chlorine and lime reaction, generate calcium chloride salt and discharge, chlorine quilt
Constantly remove, dioxin will not be accumulated because of closed loop process.Embodiments of the invention additionally provide enforcement house refuse combustion gas
The device of the method for middle dioxin zero discharge, this device is simple, and realizes that dioxin zero discharge effect is good, and energy consumption is low, low cost.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail.
The method providing dioxin zero discharge in a kind of house refuse combustion gas in an embodiment of the present invention, including with
Lower step：
Rubbish and pulverized limestone are carried out gasification burning at not less than 710 DEG C, the gas of generation is in the height not less than 705 DEG C
The lower dedusting of temperature；
Gas after dedusting is cooled to less than 74 DEG C, carries out gas-liquid separation, and detached gas is combustion gas, and liquid is condensation
Water；
Wherein, the gas after cooling is filtered or by the gas after gas-liquid separation and liquid respectively through carrying through carrying fat activated carbon
Fat activated carbon filters.
The method of dioxin zero discharge in house refuse combustion gas provided in an embodiment of the present invention, burns rubbish at high temperature
Rubbish, and to dedusting under the gas high temperature obtaining, during being somebody's turn to do, do not have the discharge of dioxin；Dioxin boiling point is 75 DEG C, dedusting
Gas afterwards is cooled to less than 74 DEG C, and dioxin becomes particulate, but water insoluble, and the dioxin of particulate is lived using carrying fat
Property charcoal filter and remove, specially by the gas after cooling through carrying fat activated carbon and filtering or divide the gas after gas-liquid separation and liquid
Do not filter through carrying fat activated carbon, so, dioxin particulate trap is in carrying fat activated carbon, thus realizing combustion gas and the condensation of discharge
Zero content of the dioxin in water.
Preferably, the load fat activated carbon after filtering is reclaimed, carry out gasification burning together with rubbish and pulverized limestone.To filter
Load fat activated carbon afterwards reclaims, and carries out high-temperature gasification burning, dioxin high-temp combustion decomposites chlorine together with rubbish and pulverized limestone
Gas and lime reaction, generate calcium chloride salt and discharge, chlorine is constantly removed, and dioxin will not be accumulated because of closed loop process.
Separate state in order to during gasification burning, make dioxin be in, the temperature of described gasification burning is 710-
1050℃；Simultaneously in order that dioxin more fully decomposes it is preferable that the temperature of described gasification burning is 850-1000 DEG C；For
Energy saving is it is preferable that the temperature of described gasification burning is 725-735 DEG C.
In order to during dedusting, the presence of no dioxin, the temperature of dedusting is 705-725 DEG C；Simultaneously in order to save
The energy is it is preferable that the temperature of dedusting is 705-710 DEG C.
Dioxin is that during gaseous state, its molecular diameter is about 0.7nm, its H with diameter 0.28-0.45nm2、CO、CH4Deng gas
Molecule together, is walked from load fat activated carbon granule gap and is crossed and be removed it is not easy to dissolve in fat.Applicant is through repeatedly setting
Meter and test of many times checking find, when reducing uniform temperature, dioxin is in microsome it is easier to remove.Therefore, for the ease of inciting somebody to action
Dioxin carries out separating, and realizes the zero-emission of dioxin.Preferably, the gas after dedusting is cooled to 25-70 DEG C, this temperature conditions
Under, dioxin is in microsome.In order to dioxin is in stable particulate figure, and simultaneously for energy saving, it is highly preferred that dedusting
Gas afterwards is cooled to 35-45 DEG C.
Dioxin solubility only 7.2 × 10 in water under normal temperature-6Mg/L, and the solubility in dichloro-benzenes is up to
1400mg/L, illustrates that dioxin is it 100.8 hundred million times of solubility in water in the solubility in fat.For the ease of two are disliked
English removes, and applicant's test of many times has been obtained load fat activated carbon it is preferable that described load fat activated carbon is prepared by following methods：
Fat is loaded into activated carbon capillary after being dissolved by the solvent, and is then heated to solvent boiling point, and solvent volatilizees, and fat is active
Charcoal micropore holds and stays in micropore.The preparation method of this load fat activated carbon is simple, and prepared load fat activated carbon realizes dioxin
Removal completely, and activated carbon repeat utilize, low cost.
Present invention also offers implement above-mentioned house refuse combustion gas in dioxin zero discharge method device, including according to
The secondary gasification furnace being connected by pipeline, air-valve, high temperature resistant cyclone dust collectors, heat exchanger, air-introduced machine, gas-liquid separator；Additionally, also
Including be arranged between heat exchanger and gas-liquid separator carry fat adsorption box or with the pipeline of the gaseous phase outlet of gas-liquid separator on
With the load fat adsorption box connecting respectively on the pipeline of liquid-phase outlet.
The device of the method for dioxin zero discharge, this dress in the enforcement house refuse combustion gas that embodiments of the invention provide
Put simply it is achieved that the continuous operation of machinery can reach dioxin zero discharge, and whole process energy consumption is low, low cost.Its
In, carry fat adsorption box built with load fat activated carbon.
Wherein, the combustible gas stream that the destructive distillation of gasification furnace first section produces is to the zoneofoxidation in gasification furnace stage casing and O2Reaction generates CO2For
Exothermic reaction, moment exceeds 500 DEG C, and dioxin is difficult to generate；And the fire box temperature burnt may be up to 1050 DEG C, dioxin quilt
Thoroughly decompose.Air-valve adjustment gasification furnace pressure is so that it normally runs.
After combustion gas >=730 DEG C that gasification furnace is discharged enter high temperature resistant cyclone dust collectors, high temperature resistant cyclone dust collectors can remove
Remove wherein general 90% dust.In order to remove chalk dust removing further it is preferable that described high temperature resistant cyclone dust collectors and described heat exchange
It is also associated with the high temperature resistant separator of FeAl film between device.The temperature of separator dedusting that FeAl film is high temperature resistant is 705-715 DEG C, preferably
For 705-710 DEG C.FeAl film is also intermetallic compound anisotropic membrane, filters skill by this intermetallic compound anisotropic membrane
Art, 8.0 μm of particles of particle diameter ＞ is separated, the combustion gas obtaining is more pure, better meets the needs of combustion gas use.As：Combustion
Gas-turbine requires the average equivalent bulb diameter of combustion gas impurity to be not more than 8～11 μm.Through high temperature resistant cyclone dust collectors and FeAl film
Dedusting that high temperature resistant separator two-stage is high temperature resistant, because temperature is above the temperature of dioxin decomposition, therefore, the powder that deduster is collected
Dirt, will be free from dioxin.
Radiator in the device of method of dioxin zero discharge in the house refuse combustion gas that the present invention provides can be adopted
With 1 heat transmission equipment, combustion gas is cooled to less than 74 DEG C；But consider heat utilization needs and reduces cost, can be first with 1 heat exchanger
Combustion gas is cooled to more than 74 DEG C, then with second heat exchanger, combustion gas is cooled to less than 74 DEG C.Preferably, described heat exchanger is
More than 1, can be such as 1,2,3,4,5,8 etc.；Wherein it is preferably 2.As：If two heat exchangers,
Can be a convection bank heat exchanger or plate type heat exchanger and a shell-and-tube heat exchanger, but be not limited to these three heat exchange
Device.Any realize for fuel gas temperature being cooled to the number of units of 74 DEG C of heat exchangers used below and its species all in the guarantor of the present invention
In the range of shield.
Further, described heat exchanger includes a convection bank heat exchanger or plate type heat exchanger and a pipe shell type heat exchange
Device；
Temperature is reduced to 140-300 DEG C by described convection bank heat exchanger or plate type heat exchanger, preferably 140-180 DEG C；
Temperature is reduced to 25-70 DEG C by described shell-and-tube heat exchanger, preferably 35-45 DEG C.So successively the temperature of gas is reduced, and
And after shell-and-tube heat exchanger cooling, temperature is less than the boiling point of dioxin, dioxin is changed into particulate, so, pipe shell type heat exchange
The combustion gas of device outlet, enters gas-liquid separator together with particulate and condensed water.
It is provided between heat exchanger and gas-liquid separator and carry fat adsorption box or bottom (the going out of water in gas-liquid separator
Mouthful) and top (outlet of gas), it is separately installed with load fat adsorption box, case is built with load fat activated carbon.Dioxin particulate is along load fat
Activated carbon washes away and is melted in the fat of its micropore, and the water after filtration and combustion gas do not have dioxin, using combustion gas no dioxin
Harm.In addition, reclaiming melting the load fat activated carbon having dioxin particulate, putting into gasification furnace, carrying fat activated carbon and burning in gasification furnace
In the chlorine that decomposites with pulverized limestone, dioxin high-temp combustion and lime reaction, generate calcium chloride salt and discharge, so, chlorine
Constantly removed, dioxin will not be accumulated because of closed loop process.
Embodiment 1
In a kind of house refuse combustion gas, the method for dioxin zero discharge, comprises the following steps：
Rubbish and pulverized limestone are carried out gasification burning, gas dedusting under 705 DEG C of high temperature of generation at 710 DEG C；
1 deduster of gas after dedusting is cooled to and enters the load fat absorption that shell and tube cooler outlet is installed after 74 DEG C
Case filters, and carries out gas-liquid separation from this load fat adsorption box gas out, detached gas collection is combustion gas, and liquid is condensation
Water；
Wherein, carry fat activated carbon to be prepared by following methods：Fat is loaded into activated carbon capillary after being dissolved by the solvent, and then heats
To solvent boiling point, solvent volatilizees, and fat is held and stayed in micropore by activated carbon capillary；
Load fat activated carbon after filtering is reclaimed, carries out gasification burning together with rubbish and pulverized limestone.
Embodiment 2
In a kind of house refuse combustion gas, the method for dioxin zero discharge, comprises the following steps：
Rubbish and pulverized limestone are carried out gasification burning, gas dedusting under 710 DEG C of high temperature of generation at 850 DEG C；
Gas after dedusting is first cooled to 300-140 DEG C with the 1st convection bank heat exchanger, then is changed with the 2nd shell-and-tube
Hot device is cooled to 25 DEG C, carries out gas-liquid separation, and detached gas and liquid all filter through overload fat activated carbon, the gas after filtration
Collect and be combustion gas, liquid is condensed water；
Wherein, carry fat activated carbon to be prepared by following methods：Fat is loaded into activated carbon capillary after being dissolved by the solvent, and then heats
To solvent boiling point, solvent volatilizees, and fat is held and stayed in micropore by activated carbon capillary；
Load fat activated carbon after filtering is reclaimed, carries out gasification burning together with rubbish and pulverized limestone.
Embodiment 3
In a kind of house refuse combustion gas, the method for dioxin zero discharge, comprises the following steps：
Rubbish and pulverized limestone are added gasification furnace to carry out gasification burning at 735 DEG C, the gas of generation is logical after air-valve
Enter high temperature resistant cyclone dust collectors, dedusting under 715 DEG C of high temperature；
Gas after dedusting is first cooled to 300-140 DEG C with the 1st platen type heat exchanger, then with the 2nd shell-and-tube heat exchanger
It is cooled to and after 45 DEG C, enters the load fat adsorption box filtration that shell and tube cooler outlet is installed, from this load fat adsorption box gas out
Carry out gas-liquid separation, gas collection is combustion gas, liquid is condensed water；
Wherein, carry fat activated carbon to be prepared by following methods：Fat is loaded into activated carbon capillary after being dissolved by the solvent, and then heats
To solvent boiling point, solvent volatilizees, and fat is held and stayed in micropore by activated carbon capillary；
Load fat activated carbon after filtering is reclaimed, puts into gasification furnace, carry out gasification burning together with rubbish and pulverized limestone.
Embodiment 4
In a kind of house refuse combustion gas, the method for dioxin zero discharge, comprises the following steps：
Rubbish and pulverized limestone are added gasification furnace to carry out gasification burning at 750 DEG C, the gas of generation is logical after air-valve
Enter high temperature resistant cyclone dust collectors, dedusting under 710 DEG C of high temperature, then pass to the high temperature resistant separator of FeAl film, particle diameter is more than
8.0 μm of particles separate；
Gas after dedusting is passed through convection bank heat exchanger and shell-and-tube heat exchanger successively, and convection bank heat exchanger is by gas
Temperature is reduced to 180 DEG C, and gas temperature is reduced to 45 DEG C by shell-and-tube heat exchanger；
It is passed through gas-liquid separator and carries out gas-liquid separation after air-introduced machine, in the pipe of the bottom (outlet of water) of gas-liquid separator
On the pipeline on road and top (outlet of gas), it is separately installed with load fat adsorption box, case is built with load fat activated carbon, detached gas
Body and liquid all filter through overload fat activated carbon, and the gas collection after filtration is combustion gas, and liquid is condensed water；
Wherein, carry fat activated carbon to be prepared by following methods：Fat is loaded into activated carbon capillary after being dissolved by the solvent, and then heats
To solvent boiling point, solvent volatilizees, and fat is held and stayed in micropore by activated carbon capillary；
Load fat activated carbon after filtering is reclaimed, puts into gasification furnace, carry out gasification burning together with rubbish and pulverized limestone.
Embodiment 5
In a kind of house refuse combustion gas, the method for dioxin zero discharge, comprises the following steps：
Rubbish and pulverized limestone are added gasification furnace to carry out gasification burning at 1000 DEG C, the gas of generation is logical after air-valve
Enter high temperature resistant cyclone dust collectors, dedusting under 710 DEG C of high temperature, then pass to the high temperature resistant separator of FeAl film, be 705 in temperature
At DEG C, particle diameter is more than 8.0 μm of particles to separate；
Gas after dedusting is passed through convection bank heat exchanger and shell-and-tube heat exchanger successively, and convection bank heat exchanger is by gas
Temperature is reduced to 140 DEG C, and gas temperature is reduced to 35 DEG C by shell-and-tube heat exchanger；
It is passed through gas-liquid separator and carries out gas-liquid separation after air-introduced machine, in the pipe of the bottom (outlet of water) of gas-liquid separator
On the pipeline on road and top (outlet of gas), it is separately installed with load fat adsorption box, case is built with load fat activated carbon, detached gas
Body and liquid all filter through overload fat activated carbon, and the gas collection after filtration is combustion gas, and liquid is condensed water；
Wherein, carry fat activated carbon to be prepared by following methods：Fat is loaded into activated carbon capillary after being dissolved by the solvent, and then heats
To solvent boiling point, solvent volatilizees, and fat is held and stayed in micropore by activated carbon capillary；
Load fat activated carbon after filtering is reclaimed, puts into gasification furnace, carry out gasification burning together with rubbish and pulverized limestone.
Embodiment 6
In a kind of house refuse combustion gas, the method for dioxin zero discharge, comprises the following steps：
Rubbish and pulverized limestone are added gasification furnace to carry out gasification burning at 1050 DEG C, the gas of generation is logical after air-valve
Enter high temperature resistant cyclone dust collectors, dedusting under 725 DEG C of high temperature, then pass to the high temperature resistant separator of FeAl film, be 715 in temperature
At DEG C, particle diameter is more than 8.0 μm of particles to separate；
Gas after dedusting is passed through convection bank heat exchanger and shell-and-tube heat exchanger successively, and convection bank heat exchanger is by gas
Temperature is reduced to 300 DEG C, and gas temperature is reduced to 70 DEG C by shell-and-tube heat exchanger；
It is passed through gas-liquid separator and carries out gas-liquid separation after air-introduced machine, in the pipe of the bottom (outlet of water) of gas-liquid separator
On the pipeline on road and top (outlet of gas), it is separately installed with load fat adsorption box, case is built with load fat activated carbon, detached gas
Body and liquid all filter through overload fat activated carbon, and the gas collection after filtration is combustion gas, and liquid is condensed water；
Wherein, carry fat activated carbon to be prepared by following methods：Fat is loaded into activated carbon capillary after being dissolved by the solvent, and then heats
To solvent boiling point, solvent volatilizees, and fat is held and stayed in micropore by activated carbon capillary；
Load fat activated carbon after filtering is reclaimed, puts into gasification furnace, carry out gasification burning together with rubbish and pulverized limestone.
Condensed water and combustion gas that in the house refuse combustion gas that embodiment 1-6 is provided, the method for dioxin zero discharge obtains
Carry out the detection of dioxins concentration, the detection of dioxins concentration is carried out using HRGC/HRMS dioxin standard detecting method, obtains
Data as shown in table 1；The combustion gas being obtained is detected through environmental quality inspection center of Tsing-Hua University, the heat of the combustion gas obtaining simultaneously
Value is as shown in table 1.
The content of table 1 dioxin and the testing result of fuel gases calorific value
As it can be seen from table 1 the method for dioxin zero discharge is real in house refuse combustion gas provided in an embodiment of the present invention
Show the zero-emission of dioxin, the condensed water obtaining can directly discharge, and this combustion gas has not contained the pollution of dioxin；And this
The combustion gas that inventive embodiments are obtained is high heating value combustion gas, has critically important using value.
The method of dioxin zero discharge and its equipment in the house refuse combustion gas that the present invention provides, form dioxin zero-emission
Put closed loop process, including following advantage：First, burning away the refuse does not have chimney, not to any waste of airborne release, the product burnt away the refuse
Thing is high heating value combustion gas, enters gas storage holder, as utility vending；2nd, the present invention utilizes the fat-soluble property of dioxin, will contain two
The material disliking English filters through overload fat activated carbon, and the water obtaining and combustion gas do not have dioxin；3rd, adopt hi-temp hi-effective dedusting
Device, makes the dust that deduster is collected there is not dioxin contamination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (16)
1. in a kind of house refuse combustion gas the method for dioxin zero discharge it is characterised in that comprising the following steps：
Rubbish and pulverized limestone are carried out gasification burning at not less than 710 DEG C, the gas of generation is under the high temperature not less than 705 DEG C
Dedusting；
Gas after dedusting is cooled to less than 74 DEG C, carries out gas-liquid separation, and detached gas is combustion gas, and liquid is condensed water；
Wherein, the gas being cooled to less than 74 DEG C is filtered through load fat activated carbon or the gas after gas-liquid separation and liquid are distinguished
Filter through carrying fat activated carbon.
2. in house refuse combustion gas according to claim 1 the method for dioxin zero discharge it is characterised in that described gas
Change the temperature burned and be 710-1050 DEG C.
3. in house refuse combustion gas according to claim 2 the method for dioxin zero discharge it is characterised in that described gas
Change the temperature burned and be 850-1000 DEG C.
4. in house refuse combustion gas according to claim 1 the method for dioxin zero discharge it is characterised in that dedusting
Temperature is 705-725 DEG C.
5. in house refuse combustion gas according to claim 4 the method for dioxin zero discharge it is characterised in that dedusting
Temperature is 705-710 DEG C.
6. in house refuse combustion gas according to claim 1 the method for dioxin zero discharge it is characterised in that after dedusting
Gas be cooled to 25-70 DEG C.
7. in house refuse combustion gas according to claim 6 the method for dioxin zero discharge it is characterised in that after dedusting
Gas be cooled to 35-45 DEG C.
8. in house refuse combustion gas according to claim 1 the method for dioxin zero discharge it is characterised in that described load
Fat activated carbon is prepared by following methods：
Fat is loaded into activated carbon capillary after being dissolved by the solvent, and is then heated to solvent boiling point, and solvent volatilizees, and fat is micro- by activated carbon
Hole holds and stays in micropore.
9. implement the device of the method for dioxin zero discharge in the house refuse combustion gas described in any one of claim 1-8, its
Be characterised by, including pass sequentially through pipeline connection gasification furnace, air-valve, high temperature resistant cyclone dust collectors, heat exchanger, air-introduced machine, gas
Liquid/gas separator；
Additionally, also include being arranged between heat exchanger and gas-liquid separator carry fat adsorption box or the gas phase with gas-liquid separator goes out
The load fat adsorption box connecting respectively on the pipeline of mouth and on the pipeline of liquid-phase outlet.
10. device according to claim 9 it is characterised in that described high temperature resistant cyclone dust collectors and described heat exchanger it
Between be also associated with the high temperature resistant separator of FeAl film.
11. devices according to claim 10 are it is characterised in that particle diameter is more than by the high temperature resistant separator of described FeAl film
0.3 μm of particle separates.
12. devices according to claim 11 are it is characterised in that particle diameter is more than by the high temperature resistant separator of described FeAl film
8.0 μm of particles separate.
13. devices according to claim 9 are it is characterised in that described heat exchanger is more than 1.
14. devices according to claim 13 are it is characterised in that described heat exchanger is 2.
15. devices according to claim 13 it is characterised in that described heat exchanger include a convection bank heat exchanger or
Plate type heat exchanger and a shell-and-tube heat exchanger；
Temperature is reduced to 140-300 DEG C by described convection bank heat exchanger or plate type heat exchanger；Described shell-and-tube heat exchanger is by temperature
Degree is reduced to 25-70 DEG C.
16. devices according to claim 15 are it is characterised in that described convection bank heat exchanger or plate type heat exchanger are by temperature
Degree is reduced to 140-180 DEG C；Temperature is reduced to 35-45 DEG C by described shell-and-tube heat exchanger.
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| JPH08131775A (en) * | 1994-11-10 | 1996-05-28 | Mitsubishi Heavy Ind Ltd | Dry treatment method for exhaust gas |
| KR100650110B1 (en) * | 1999-07-09 | 2006-11-24 | 토다 고교 가부시끼가이샤 | Process for treating dioxin-containing exhaust gas and composite catalyst composition for inhibiting generation of dioxin |
| CN1219577C (en) * | 2001-10-19 | 2005-09-21 | 陈泽峰 | Cloth bag and active carbon filter combined three-stage high-effective dust-removing cleaning equipment |
| CN1715195A (en) * | 2004-07-02 | 2006-01-04 | 中国科学院生态环境研究中心 | The preparation method of the compound adsorbent of persistent organism in a kind of quick removal water |
| CN101112669A (en) * | 2007-08-30 | 2008-01-30 | 福建省丰泉环保设备有限公司 | Multilevel purifier for disacidifying using dry and wet method and for removing dust by using cloth bag |
| CN101695619B (en) * | 2009-11-12 | 2011-05-11 | 民政部一零一研究所 | Drawer type active carbon filter |
| CN201823472U (en) * | 2010-12-10 | 2011-05-11 | 常州市三信环保设备有限公司 | Flue gas treatment system |
| CN102042597B (en) * | 2010-12-10 | 2012-08-22 | 江苏三信环保设备有限公司 | Household garbage incineration and flue gas processing system and method for processing household garbage |
| CN102627983B (en) * | 2012-04-01 | 2014-03-12 | 张建超 | Fluidized bed plasma garbage-gasifying equipment and gasifying process thereof |
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