CN208643669U - A kind of system thermal desorption processing organic polluted soil and exhaust-gas treatment is desorbed - Google Patents
A kind of system thermal desorption processing organic polluted soil and exhaust-gas treatment is desorbed Download PDFInfo
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- CN208643669U CN208643669U CN201820768726.3U CN201820768726U CN208643669U CN 208643669 U CN208643669 U CN 208643669U CN 201820768726 U CN201820768726 U CN 201820768726U CN 208643669 U CN208643669 U CN 208643669U
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- gas
- thermal desorption
- desorption
- desorbed
- exhaust
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- 238000003795 desorption Methods 0.000 title claims abstract description 284
- 239000002689 soil Substances 0.000 title claims abstract description 162
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- 238000010438 heat treatment Methods 0.000 claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000000446 fuel Substances 0.000 claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
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- 238000000926 separation method Methods 0.000 claims description 11
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- 238000001816 cooling Methods 0.000 description 29
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- 239000012855 volatile organic compound Substances 0.000 description 17
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 14
- 238000002485 combustion reaction Methods 0.000 description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 11
- 239000001301 oxygen Substances 0.000 description 11
- 229910052760 oxygen Inorganic materials 0.000 description 11
- 238000005067 remediation Methods 0.000 description 11
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- 230000009471 action Effects 0.000 description 9
- 239000002283 diesel fuel Substances 0.000 description 9
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 9
- 150000002430 hydrocarbons Chemical class 0.000 description 8
- 239000003345 natural gas Substances 0.000 description 8
- 239000003209 petroleum derivative Substances 0.000 description 8
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
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- 238000011084 recovery Methods 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 239000003225 biodiesel Substances 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
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- -1 halogenated aryl hydrocarbon Chemical class 0.000 description 2
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- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
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- DXBHBZVCASKNBY-UHFFFAOYSA-N 1,2-Benz(a)anthracene Chemical compound C1=CC=C2C3=CC4=CC=CC=C4C=C3C=CC2=C1 DXBHBZVCASKNBY-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- RAASUWZPTOJQAY-UHFFFAOYSA-N Dibenz[a,c]anthracene Chemical compound C1=CC=C2C3=CC4=CC=CC=C4C=C3C3=CC=CC=C3C2=C1 RAASUWZPTOJQAY-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a kind of system thermal desorption processing organic polluted soil and exhaust-gas treatment is desorbed, including heating power incinerator, desorption flue gas register, thermal desorption reactor, deduster, heat exchange/steam-water separator, absorbing reaction device, star-like discharging device, soil cooler；For absorbent containing organic pollutant as fuel, heating power, which burns, realizes organic pollutant decomposition and harmless treatment；It burns the high-temperature flue gas generated and repairs heat carrier as organic pollutant soil thermal desorption；There is using fuel oil to organic matter the characteristic of high-solvency, the organic pollutant in exhaust gas, purification gas qualified discharge are desorbed using fuel oil as absorbent absorption cleaning；The utility model realizes the thermal desorption of organic pollutant, the thorough decomposition of the absorption cleaning, organic pollutant of pollutant in exhaust gas is desorbed, and fuel oil has two kinds of functions of absorbent and fuel, and the utility model process is short, low energy consumption, equipment is simple, at low cost.
Description
Technical field
The utility model belongs to the regeneration field of contaminated soil, in particular to a kind of thermal desorption processing organic polluted soil and
The system that exhaust-gas treatment is desorbed.
Background technique
China's soil contamination problem is very prominent, and recovery technique is in urgent need.Contaminated soil can be divided into organic polluted soil
With two class of inorganic pollution soil, according to organic pollutant property, from technical principle angle, organic polluted soil recovery technique is main
Including thermal desorption, steam extraction, chemical oxidation/reduction, fixing/stabilising method, incineration method, microbial method, phytoremediation etc..
Thermal desorption technology is one of effective Organically-pollutedsoil soil remediation method, using different heat sources, by way of heating
Organic polluted soil is heated to the boiling point near or above organic matter, so that organic pollutant is volatilized and is separated from soil, so
Desorption exhaust gas is handled again afterwards, achievees the purpose that reparation.Thermal desorption method can effectively remove volatility in soil, partly wave
Hair property organic pollutant, such as: volatile organic matter (VOCs), polycyclic aromatic hydrocarbon (PAHs), Polychlorinated biphenyls (PCBs).This technology
It starts from the 1980s, reaching 70% or more using the ratio that thermal desorption technology is repaired in U.S.'s organic polluted soil；And
In China, thermal desorption technology is just in the starting stage.The existing thermal desorption renovation of organic pollution soil technology main distinction is to adopt
Heat source and fuel, energy regenerating and power save mode, the processing of desorption exhaust gas and disposal options etc..
Heat source and fuel are the cost for determining to repair and the main aspect of feasibility, low cost, the heat source easily obtained and combustion
Material is conducive to the implementation and popularization of technology.The heat source and fuel that the prior art uses include: (1) desorption organic pollutant as combustion
Expect the combustion tail gas (106216382 A of CN) generated, (2) electric energy, natural gas or hot fume (104971819 A of CN,
CN106140801 A, CN105964671 A, 799392 A of CN106, CN101972773 B, CN102069088 B), (3)
The waste heats such as high-temperature flue gas, high temperature air, high-temperature steam or high-temp liquid (104307865 A of CN), (4) natural gas, biomass fuel
(CN104646409 A) such as material, (5) coal, liquefied gas or natural gas (CN 101530858A, 759464 CN104 A), (6) combustion
Gas and desorption exhaust gas are mixed and burned high-temperature flue gas (CN103962374 A), and (7) power plant cleans tail gas (CN101947543 B).It is existing
There is technology generally using liquid fuels such as the solid fuels such as the gaseous fuels such as natural gas, coal, biomass fuels as fuel combustion, produces
Raw high-temperature gas is used to be desorbed, or directlys adopt electrolysis heat and realize thermal desorption, and wherein gaseous fuel exists into practical applications
This is higher, and source is limited, is unfavorable for the problem of field repair uses；Liquid fuel convenient transportation, but if only by liquid fuel
For generating high-temperature gas, then there are problems that higher cost；Cost is relatively low for solid fuel, but there are burner complexity, produces
Raw high-temperature gas impurity content is high, the problem of subsequent purification difficulty.Such as the middle promulgated by the State Council that application publication number is CN106140801 A
Bright patent discloses a kind of restorative procedure of organic material contaminated soil, preheats heavily contaminated soil with the hot exhaust gas of thermal desorption device,
The hot fume of natural gas combustion device be heat source, by indirect heating counterweight contaminated soil carry out thermal desorption processing, then with
Low temperature pyrogenation analysis is carried out after light contaminated soil mixing, being mixed and burned containing organic gases and natural gas for generation is desorbed, from
And achieving the purpose that decomposition, the technology is the problem is that will affect the burning process item of natural gas after exhaust gas introducing combustion system
Part is unfavorable for the control of combustion process.Application publication number, which discloses one kind for the Chinese invention patent of 106216382 A of CN, to be had
Machine contaminated soil thermal desorption processing system and method, using desorption organic pollutant burning generate heat-carrying gas, heat-carrying gas with
Exhaust gas is desorbed and carries out heat exchange, partly or entirely enters desorption system by indirect heating and contaminated soil is desorbed.The system utilizes
The exhaust gas generated is desorbed as the energy, the not extra fuel in addition to system start-up phase, for the desorption sufficiently high height of exhaust gas calorific value
Concentration organic contaminated soil, have the effect of it is energy-efficient, but if organic contaminants in soil concentration is lower, be desorbed exhaust gas
When being not enough to from main burning, and providing enough heats for desorption, system application is restricted.It is not disclosed by liquid fuel at present
As desorption waste gas purification absorbent, and using liquid fuel and desorption organic pollutant mixture as the technical side of fuel
Case.
The processing of the desorption exhaust gas containing organic pollutant is directly burnt with disposal options including not refuelling in the prior art
Afterwards as desorption heat source, dust separation, be mixed and burned and decompose with the gaseous fuels such as natural gas (CN106140801 A,
CN103962374 A), activated carbon adsorption purifies (103658165 A of CN), and dedusting, burning or being directly used in soil preheats (CN
104307864 104607455 A of A, CN), high temperature incineration processing (CN103008337 B, CN105964671 A) after dedusting,
Condensation method separates and recovers the organic matter (CN106799392 A) in exhaust gas, and chemical oxidation/reduction purification handles (CN102580994
B), (CN101972773 B, CN102069088 B, CN104607 455 are handled for adsorption cleaning after preheating desorption air
B), alkali absorption method purification (CN 101530858A), cement kiln is interior to burn purification (102513346 B of CN).In the prior art,
Desorption waste gas heat utilization mode is mainly used for contaminated soil preheating or pre- desorption, preheating desorption air, has no and passes through desorption
Exhaust gas and the Land use systems of burning combustion air heat exchange disclose；In prior art, desorption exhaust gas is using activated carbon adsorption etc.
Dry cleaning mode, purification efficiency is high, but the desorption exhaust-gas treatment effect high to organic pollutant concentration, humidity is big is difficult to protect
Card, it is at high cost；Condensing recovery method is only applicable to high-concentration waste gas disposal, and gas is difficult to reach discharge standard after purification；Part skill
Art uses the method using combustion system resolution process exhaust gas, such as the Chinese invention that application publication number is CN103962374 A
Patent discloses a kind of organic polluted soil thermal desorption restoration processing system, and combustion gas and desorption exhaust gas are in combuster and burner
It is mixed and burned in the burning of composition and exhaust treatment system and generates high-temperature flue gas, realized in Dual-barrel rotary kiln by indirect heating
The thermal desorption of organic polluted soil is handled.But have no the public technology using the organic solvents absorption cleaning such as fuel oil desorption exhaust gas,
Also it has no to reach decomposing pollutant and generate high-temperature gas the organic pollutant after separation with fuel mixed firinor fuel burning and is used for soil
The technology of thermal desorption.
Summary of the invention
It is high for thermal desorption heat source existing for existing organic material contaminated soil recovery technique/fuel cost, it is desorbed at exhaust gas
Reason method is complicated, and desorption waste gas purification adsorbent absorbent disposition is cumbersome, thermal desorption, UTILIZATION OF VESIDUAL HEAT IN, desorption waste gas purification process
It is long, the problems such as difficult is combined between each functional unit, the utility model proposes a kind of organic material contaminated soil thermal desorption and desorptions
Exhaust-gas treatment integral system has the characteristic of high-solvency using fuel oil, using fuel oil as absorbent to organic matter
The organic pollutant in exhaust gas, purification gas qualified discharge is desorbed in absorption cleaning；Fuel oil containing organic pollutant as fuel,
It is burned by heating power and realizes organic pollutant decomposition and harmless treatment during high-temp combustion；Burn the high temperature cigarette generated
Gas repairs heat carrier as organic pollutant soil thermal desorption.
A kind of system thermal desorption processing organic polluted soil and exhaust-gas treatment is desorbed, including heating power incinerator, desorption cigarette
Gas register, thermal desorption reactor, deduster, heat exchange/steam-water separator, absorbing reaction device, star-like discharging device, soil are cooling
Device, heating power incinerator, desorption flue gas register, thermal desorption reactor, deduster, heat exchange/steam-water separator, absorbing reaction device
Be sequentially connected and be equipped between connecting two-by-two valve, desorption flue gas register be also connected with gas at normal temperature pipeline and the two it
Between be equipped with valve, thermal desorption reactor is also connected with star-like discharging device and between the two equipped with valve, star-like discharging device and soil
Cooler is connected, between heat exchange/steam-water separator is also respectively connected with and connect two-by-two with combustion-supporting gas pipeline and heating power incinerator
It is equipped with valve, absorbing reaction device is also connected with heating power incinerator and is equipped with valve between the two, is additionally provided on absorbing reaction device
Fuel oil-in.
The heating power incinerator is mechanical atomization oil burner, rotary-cup type atomized fuel burner, air atomizing fuel oil
Burner or steam atomizing burner.
The thermal desorption reactor is rotary kiln, fixed bed reactors, fluidized-bed reactor or moving-burden bed reactor.
The deduster be bag filter, electrostatic precipitator, cyclone dust collectors, electricity-bag complex dust collector, spray column,
Washer or impingement dust collector.
Heat exchange/the steam-water separator is double pipe heat exchanger, plate heat exchanger, fixed tube-sheet exchanger, floating head type
Heat exchanger or U-shaped pipe heat exchanger.
The absorbing reaction device is packed tower, tubulent contact tower or sieve-plate tower, and packed tower is as absorbing reaction device, empty tower gas velocity control
System is in 0.1 ~ 2.0m/s；Tubulent contact tower is absorbing reaction device, and empty tower gas velocity is controlled in 1.0 ~ 7.0 m/s；Sieve-plate tower is anti-as absorbing
Device is answered, empty tower gas velocity is controlled in 0.8 ~ 3.0m/s.
The soil cooler is water-cooled screw conveyor.
The desorption flue gas register is that high-temperature gas and gas at normal temperature can be placed in one to mix the container of temperature adjustment.
The method for carrying out thermal desorption processing organic polluted soil based on system and exhaust-gas treatment being desorbed, the specific steps are as follows:
(1) heating power burns: fuel oil and combustion-supporting gas are carried out the high temperature cigarette that hybrid thermodynamic burns 800-1500 DEG C of generation
Gas；
(2) flue gas temperature adjustment: carrying out high-temperature flue gas and gas at normal temperature that step (1) generates to be mixed to get thermal desorption flue gas,
By changing the ratio of high-temperature flue gas and gas at normal temperature flow, thermal desorption flue-gas temperature is adjusted to organic polluted soil thermal desorption
120 ~ 820 DEG C of required temperature；
(3) thermal desorption: the thermal desorption flue gas obtained after step (2) temperature adjustment and organic material contaminated soil to be processed are carried out
Reverse contact 5-25min, organic pollutant are desorbed into desorption flue gas under high temperature action, are formed de- containing organic pollutant
Attached exhaust gas and the soil handled by thermal desorption；
(4) dedusting: the desorption exhaust gas containing organic pollutant that step (3) is obtained is dusted, and separates in exhaust gas
Grain object generates and exhaust gas is desorbed containing organic pollutant through dedusting；
(5) heat exchange: step (4) is changed through the desorption exhaust gas containing organic pollutant of dedusting with combustion-supporting gas indirectly
Heat is reduced the temperature of the desorption exhaust gas containing organic pollutant, improves combustion-supporting gas temperature, and separated in the form of condensed water containing organic
The moisture in exhaust gas is desorbed in pollutant, the combustion-supporting gas by heating to step (1)；
(6) absorption cleaning: will connecing containing organic pollutant desorption exhaust gas and fresh fuel oil adverse current by step (5) processing
It touches, the organic pollutant in exhaust gas is by fuel oil absorption cleaning, exhaust gas qualified discharge；Fuel oil containing organic pollutant returns
Heating power burns in step (1)；
(7) soil is cooling: the soil by step (3) by thermal desorption processing cools down, then in step (5)
Obtained condensed water carries out humidification discharge.
Step (1) fuel oil is light diesel fuel, heavy diesel fuel, kerosene, heavy oil, biodiesel, petroleum washing oil, tar are washed
The liquid mixing that one or more of oil, ethyl alcohol, methanol, heptane, n-hexane, normal octane are mixed to form in any proportion
Object；The combustion-supporting gas is the gas of oxygen to be provided for fuel oil combustion, including air or oxygen volume fraction is 25% ~ 100%
Gas；Step (2) gas at normal temperature is the mixture of one or both of air at room temperature, room temperature under nitrogen arbitrary proportion.
Step (3) organic material contaminated soil is organic pollution soil of the boiling point of organic pollutant at 100 ~ 800 DEG C
Earth, organic matter include polycyclic aromatic hydrocarbon, Polychlorinated biphenyls, benzene homologues, pesticide, ethers, halogenated aliphatic hydrocarbon or halogenated aryl hydrocarbon, are specifically had
Machine pollutant include benzene, toluene, ethylbenzene, dimethylbenzene, naphthalene, benzanthracene, benzofluoranthrene, BaP, two indeno pyrenes, dibenzanthracene,
One of DDT, six six six are a variety of.
The beneficial effects of the utility model include:
1, the thermal desorption of organic pollutant can be achieved at the same time, absorption cleaning, the organic pollutant of pollutant in exhaust gas is desorbed
Efficient thorough decomposition the purpose of, fuel oil is provided simultaneously with two kinds of functions of absorbent and fuel, the complexity without conventional thermal desorption
Exhaust treatment system is desorbed, saturable absorber processing unit necessary to purifying without conventional desorption waste gas absorption has process
It is short, low energy consumption, equipment is simple, the advantages such as at low cost.
2, fuel oil is not directly as heat source, but has the spy of high-solvency to organic matter first with fuel oil
Property, the organic pollutant in exhaust gas, purification gas qualified discharge are desorbed using fuel oil as absorbent absorption cleaning；Then will contain
The absorbent of organic pollutant as fuel, burned by heating power realized during high-temp combustion organic pollutant decompose and
Harmless treatment；It burns the high-temperature fuel gas generated and repairs heat carrier as organic pollutant soil thermal desorption, provided for thermal desorption
Heat.
Detailed description of the invention
Fig. 1 is that 1 thermal desorption of the utility model embodiment handles organic polluted soil and the knot of the system of exhaust-gas treatment is desorbed
Structure schematic diagram；
In figure, flue gas register, 3- gas at normal temperature pipeline, 4- thermal desorption reactor, 5- is desorbed in 1- heating power incinerator, 2-
Star-like discharging device, 6- soil cooler, 7- deduster, 8- heat exchange/steam-water separator, 9- combustion-supporting gas pipeline, 10- absorbing reaction
Device.
Specific embodiment
Embodiment 1
A kind of system thermal desorption processing organic polluted soil and exhaust-gas treatment is desorbed, as shown in Figure 1, including that heating power burns
Device 1, desorption flue gas register 2, thermal desorption reactor 4, star-like discharging device 5, soil cooler 6, deduster 7, heat exchange/carbonated drink
Separator 8, absorbing reaction device 10, heating power incinerator 1, thermal desorption reactor 4, deduster 7, are changed desorption flue gas register 2
Heat/steam-water separator 8, absorbing reaction device 10 are sequentially connected and are equipped between connecting two-by-two valve, and flue gas register 2 is desorbed
Also it is connected with gas at normal temperature pipeline 3 and is equipped with valve between the two, thermal desorption reactor 4 is also connected with star-like discharging device 5, star
Discharger 5 is connected with soil cooler 6, and heat exchange/steam-water separator 8 also distinguishes phase with combustion-supporting gas pipeline 9 and heating power incinerator 1
Even and two-by-two valve is equipped between connection, absorbing reaction device 10 is also connected with heating power incinerator 1 and between the two equipped with valve,
Fuel oil-in is additionally provided on absorbing reaction device 10, wherein heating power incinerator 1 is mechanical atomization oil burner, thermal desorption reaction
Device 4 is fixed bed reactors, and deduster 7 is cyclone dust collectors, and heat exchange/steam-water separator 8 is double pipe heat exchanger, absorbing reaction
Device 10 is packed tower, and soil cooler 6 is water-cooled screw conveyor.
Certain chemical industry place organic polluted soil, soil pollutant polycyclic aromatic hydrocarbon (anthracene) content are 17.22mg/kg, the soil
Moisture content is 14%, partial size 25mm after preprocessed system, handles organic polluted soil using the thermal desorption of the present embodiment and takes off
The system of attached exhaust-gas treatment carries out thermal desorption and desorption exhaust-gas treatment, the specific steps are as follows:
(1) heating power burns: fuel oil light diesel fuel and combustion-supporting gas pure oxygen are respectively enterd into mechanical atomization oil burner, into
Row hybrid thermodynamic burns the high-temperature flue gas that 7s generates 800 DEG C；
(2) flue gas temperature adjustment: high-temperature flue gas and air at room temperature that step (1) generates are mixed in desorption flue gas register
Conjunction obtains thermal desorption flue gas, by change high-temperature flue gas and air at room temperature flow ratio, by thermal desorption flue-gas temperature adjust to
400℃；
(3) thermal desorption: polycyclic aromatic hydrocarbon (anthracene) contaminated soil will be contained and be put into fixed bed reactors, after step (2) temperature adjustment
Thermal desorption flue gas and fixed bed reactors in polycyclic aromatic hydrocarbon (anthracene) contaminated soil to be processed carry out reverse contact 17min, have
Machine pollutant is desorbed into desorption flue gas under high temperature action, is formed the desorption exhaust gas containing organic pollutant and is passed through thermal desorption
The soil of processing；
(4) dedusting: the desorption exhaust gas containing organic pollutant that step (3) is obtained enters cyclone dust collectors and is dusted,
The particulate matter in exhaust gas is separated, generates and exhaust gas is desorbed containing organic pollutant through dedusting；
(5) heat exchange: the desorption exhaust gas containing organic pollutant by step (4) through dedusting is with combustion-supporting gas pure oxygen in bushing type
Indirect heat exchange is carried out in heat exchanger, the desorption exhaust gas containing organic pollutant through dedusting is passed through combustion-supporting gas pure oxygen in casing type heat exchanging
Heat exchange cooling in device, recycles heat, reduces the temperature of the desorption exhaust gas containing organic pollutant, improves combustion-supporting gas temperature, and with cold
The moisture in exhaust gas is desorbed containing organic pollutant in the form separation of condensate, the combustion-supporting gas by heating to step (1), combustion-supporting gas
The same step of body (1)；
(6) absorption cleaning: will be by step (5) processing containing organic pollutant desorption exhaust gas and fresh fuel oil light diesel fuel
The counter current contacting in packed tower, fresh light diesel fuel is as absorbent in 0.1m/s, packed tower for empty tower gas velocity control, in exhaust gas
Organic pollutant is by fuel oil absorption cleaning, and polycyclic aromatic hydrocarbon (anthracene) content is lower than 0.03g/m in purification gas3, meet national row
Put standard, exhaust gas qualified discharge；Heating power burns in fuel oil return step (1) containing organic pollutant polycyclic aromatic hydrocarbon (anthracene)；
(7) soil is cooling: the soil by step (3) by thermal desorption processing enters water-cooling spiral conveying through star-like discharging device
Machine cools down, and then the condensed water obtained in step (5) carries out humidification discharge, discharges PAHs in soil (anthracene)
Content reaches the limit value requirement of site remediation target 0.65mg/kg, and polycyclic aromatic hydrocarbon (anthracene) removal rate reaches 96.23%.
Embodiment 2
A kind of system thermal desorption processing organic polluted soil and exhaust-gas treatment is desorbed, is with the difference of embodiment 1:
Heating power incinerator 1 is rotary-cup type atomized fuel burner, and thermal desorption reactor 4 is fluidized-bed reactor, and deduster 7 removes for cloth bag
Dirt device, heat exchange/steam-water separator 8 are plate heat exchanger.
Certain organic polluted soil, soil pollutant VOCs(benzene) content is 34.5mg/kg, after the preprocessed system of the soil
Moisture content is 11%, partial size 8mm, handles organic polluted soil using the thermal desorption of the present embodiment and exhaust-gas treatment is desorbed and be
System carries out thermal desorption and desorption exhaust-gas treatment, the specific steps are as follows:
(1) heating power burns: fuel oil heavy oil and combustion-supporting gas being respectively enterd rotary-cup type atomized fuel burner, mixed
It closes heating power and burns the high-temperature flue gas that 5s generates 900 DEG C, oxygen-containing gas fraction 25%, nitrogenous gas fraction in combustion-supporting gas
75%；
(2) flue gas temperature adjustment: high-temperature flue gas and air at room temperature that step (1) generates are mixed in desorption flue gas register
Conjunction obtains thermal desorption flue gas, by change high-temperature flue gas and gas at normal temperature flow ratio, by thermal desorption flue-gas temperature adjust to
120℃；
(3) thermal desorption: by VOCs(benzene) contaminated soil is put into fluidized-bed reactor, and the heat after step (2) temperature adjustment is de-
VOCs(benzene to be processed in attached flue gas and fluidized-bed reactor) the reverse contact 5min of contaminated soil progress, VOCs(benzene) in high temperature
The lower desorption of effect enters in desorption flue gas, forms the desorption exhaust gas containing organic pollutant and the soil by thermal desorption processing；
(4) dedusting: the desorption exhaust gas containing organic pollutant that step (3) is obtained enters bag filter and is dusted,
The particulate matter in exhaust gas is separated, generates and exhaust gas is desorbed containing organic pollutant through dedusting；
(5) exhaust gas and combustion-supporting gas heat exchange: is desorbed in plate heat exchanger containing organic pollutant through dedusting in step (4)
Middle carry out indirect heat exchange, the desorption exhaust gas containing organic pollutant through dedusting are passed through combustion-supporting gas and exchange heat in plate heat exchanger drop
Temperature recycles heat, reduces the temperature of the desorption exhaust gas containing organic pollutant, improves combustion-supporting gas temperature, and in the form of condensed water
The moisture being desorbed in exhaust gas containing organic pollutant is separated, the combustion-supporting gas by heating to step (1), the same step of combustion-supporting gas
(1)；
(6) absorption cleaning: will existing containing organic pollutant desorption exhaust gas and fresh fuel oil heavy oil by step (5) processing
Counter current contacting in packed tower, the empty tower gas velocity control organic dirt of fresh heavy oil as absorbent, in exhaust gas in 2m/s, packed tower
Contaminating object by fuel oil absorption cleaning, VOCs(benzene in purification gas) content is lower than 0.35g/m3, meet national emission standard, exhaust gas
Qualified discharge；Contain organic pollutant VOCs(benzene) fuel oil return step (1) in heating power burn；
(7) soil is cooling: the soil by step (3) by thermal desorption processing enters water-cooling spiral conveying through star-like discharging device
Machine cools down, and then the condensed water obtained in step (5) carries out humidification discharge, VOCs(benzene in the soil that discharges) content
Reaching the limit value requirement of site remediation target 0.04mg/kg, VOCs(benzene) removal rate reaches 99.8%.
Embodiment 3
A kind of system thermal desorption processing organic polluted soil and exhaust-gas treatment is desorbed, is with the difference of embodiment 1:
Heating power incinerator 1 is rotary-cup type atomized fuel burner, and thermal desorption reactor 4 is fluidized-bed reactor, and deduster 7 removes for cloth bag
Dirt device, heat exchange/steam-water separator 8 are plate heat exchanger.
Certain organic polluted soil, soil pollutant VOCs(benzene) content is 34.5mg/kg, after the preprocessed system of the soil
Moisture content is 11%, partial size 8mm, handles organic polluted soil using the thermal desorption of the present embodiment and exhaust-gas treatment is desorbed and be
System carries out thermal desorption and desorption exhaust-gas treatment, the specific steps are as follows:
(1) heating power burns: fuel oil heavy diesel fuel and combustion-supporting gas being respectively enterd rotary-cup type atomized fuel burner, carried out
Hybrid thermodynamic burns the high-temperature flue gas that 8s generates 800 DEG C, oxygen-containing gas fraction 35%, nitrogenous gas fraction in combustion-supporting gas
65%；
(2) flue gas temperature adjustment: high-temperature flue gas and air at room temperature that step (1) generates are mixed in desorption flue gas register
Conjunction obtains thermal desorption flue gas, by change high-temperature flue gas and gas at normal temperature flow ratio, by thermal desorption flue-gas temperature adjust to
120℃；
(3) thermal desorption: by VOCs(benzene) contaminated soil is put into fluidized-bed reactor, and the heat after step (2) temperature adjustment is de-
VOCs(benzene to be processed in attached flue gas and fluidized-bed reactor) the reverse contact 6min of contaminated soil progress, VOCs(benzene) in high temperature
The lower desorption of effect enters in desorption flue gas, forms the desorption exhaust gas containing organic pollutant and the soil by thermal desorption processing；
(4) dedusting: the desorption exhaust gas containing organic pollutant that step (3) is obtained enters bag filter and is dusted,
The particulate matter in exhaust gas is separated, generates and exhaust gas is desorbed containing organic pollutant through dedusting；
(5) exhaust gas and combustion-supporting gas heat exchange: is desorbed in plate heat exchanger containing organic pollutant through dedusting in step (4)
Middle carry out indirect heat exchange, the desorption exhaust gas containing organic pollutant through dedusting are passed through combustion-supporting gas and exchange heat in plate heat exchanger drop
Temperature recycles heat, reduces the temperature of the desorption exhaust gas containing organic pollutant, improves combustion-supporting gas temperature, and in the form of condensed water
The moisture being desorbed in exhaust gas containing organic pollutant is separated, the combustion-supporting gas by heating to step (1), the same step of combustion-supporting gas
(1)；
(6) absorption cleaning: will be by step (5) processing containing organic pollutant desorption exhaust gas and fresh fuel oil heavy diesel fuel
The counter current contacting in packed tower, fresh heavy diesel fuel is as absorbent in 1m/s, packed tower for empty tower gas velocity control, having in exhaust gas
Machine pollutant is by fuel oil absorption cleaning, VOCs(benzene in purification gas) content is lower than 0.35g/m3, meet national emission standard,
Exhaust gas qualified discharge；Contain organic pollutant VOCs(benzene) fuel oil return step (1) in heating power burn；
(7) soil is cooling: the soil by step (3) by thermal desorption processing enters water-cooling spiral conveying through star-like discharging device
Machine cools down, and then the condensed water obtained in step (5) carries out humidification discharge, VOCs(benzene in the soil that discharges) content
Reaching the limit value requirement of site remediation target 0.04mg/kg, VOCs(benzene) removal rate reaches 99.8%.
Embodiment 4
A kind of system thermal desorption processing organic polluted soil and exhaust-gas treatment is desorbed, is with the difference of embodiment 1:
Heating power incinerator 1 is air atomizing oil burner, and thermal desorption reactor 4 is moving-burden bed reactor, and deduster 7 is electrostatic precipitation
Device, heat exchange/steam-water separator 8 are fixed tube-sheet exchanger, and absorbing reaction device 10 is tubulent contact tower.
Certain pollution by pesticides place organic polluted soil, soil pollutant toluene level are 843.42mg/kg, and the soil is through pre-
Moisture content is 12%, partial size 18mm after processing system, handles organic polluted soil using the thermal desorption of the present embodiment and desorption is useless
The system of gas disposal carries out thermal desorption and desorption exhaust-gas treatment, the specific steps are as follows:
(1) heating power burns: fuel oil biodiesel and combustion-supporting gas being respectively enterd air atomizing oil burner, carried out
Hybrid thermodynamic burns the high-temperature flue gas that 10s generates 1000 DEG C, oxygen-containing gas fraction 45%, nitrogenous gas integral in combustion-supporting gas
Number 55%；
(2) flue gas temperature adjustment: high-temperature flue gas and air at room temperature that step (1) generates are mixed in desorption flue gas register
Conjunction obtains thermal desorption flue gas, by change high-temperature flue gas and gas at normal temperature flow ratio, by thermal desorption flue-gas temperature adjust to
300℃；
(3) thermal desorption: toluene concentration soil is put into moving-burden bed reactor, by the thermal desorption cigarette after step (2) temperature adjustment
Toluene concentration soil to be processed carries out reverse contact 25min in gas and moving-burden bed reactor, and toluene is desorbed under high temperature action
Into in desorption flue gas, the desorption exhaust gas containing organic pollutant and the soil by thermal desorption processing are formed；
(4) dedusting: the desorption exhaust gas containing organic pollutant that step (3) is obtained enters electrostatic precipitator and is dusted,
The particulate matter in exhaust gas is separated, generates and exhaust gas is desorbed containing organic pollutant through dedusting；
(5) exhaust gas and combustion-supporting gas heat exchange: is desorbed in fixed tube sheet type containing organic pollutant through dedusting in step (4)
Indirect heat exchange is carried out in heat exchanger, the desorption exhaust gas containing organic pollutant through dedusting is passed through combustion-supporting gas and exchanges heat in fixed tube sheet type
Heat exchange cooling in device, recycles heat, reduces the temperature of the desorption exhaust gas containing organic pollutant, improves combustion-supporting gas temperature, and with cold
The moisture in exhaust gas is desorbed containing organic pollutant in the form separation of condensate, the combustion-supporting gas by heating to step (1), combustion-supporting gas
Body is identical as step (1)；
(6) absorption cleaning: will be by step (5) processing containing organic pollutant desorption exhaust gas and the biological bavin of fresh fuel oil
Oil counter current contacting in tubulent contact tower, fresh biodiesel is as absorbent in 1m/s, tubulent contact tower for empty tower gas velocity control, in exhaust gas
Organic pollutant by fuel oil absorption cleaning, toluene level is lower than 0.02g/m in purification gas3, meet national emission standard,
Exhaust gas qualified discharge；Heating power burns in fuel oil return step (1) containing organic pollutant toluene；
(7) soil is cooling: the soil by step (3) by thermal desorption processing enters water-cooling spiral conveying through star-like discharging device
Machine cools down, and then the condensed water obtained in step (5) carries out humidification discharge, and toluene level reaches in the soil that discharges
The limit value requirement of site remediation target 1.0mg/kg, toluene removal rate reach 99.9%.
Embodiment 5
A kind of system thermal desorption processing organic polluted soil and exhaust-gas treatment is desorbed, is with the difference of embodiment 1:
Heating power incinerator 1 is steam atomizing burner, and deduster 7 is electricity-bag complex dust collector, and heat exchange/steam-water separator 8 is floating head type
Heat exchanger, absorbing reaction device 10 are tubulent contact tower.
Certain pollution by pesticides place organic polluted soil, soil pollutant ethyl-benzene level are 642.35mg/kg, and the soil is through pre-
Moisture content is 14%, partial size 12mm after processing system, handles organic polluted soil using the thermal desorption of the present embodiment and desorption is useless
The system of gas disposal carries out thermal desorption and desorption exhaust-gas treatment, the specific steps are as follows:
(1) heating power burns: fuel oil petroleum washing oil and combustion-supporting gas being respectively enterd steam atomization oil burner, carried out
Hybrid thermodynamic burns the high-temperature flue gas that 4s generates 1500 DEG C, oxygen-containing gas fraction 65%, nitrogenous gas fraction in combustion-supporting gas
35%；
(2) flue gas temperature adjustment: high-temperature flue gas and room temperature under nitrogen that step (1) generates are mixed in desorption flue gas register
Conjunction obtains thermal desorption flue gas, by change high-temperature flue gas and gas at normal temperature flow ratio, by thermal desorption flue-gas temperature adjust to
500℃；
(3) thermal desorption: ethylbenzene contaminated soil is put into fixed bed reactors, by the thermal desorption cigarette after step (2) temperature adjustment
Ethylbenzene contaminated soil to be processed carries out reverse contact 21min in gas and fixed bed reactors, and ethylbenzene is desorbed under high temperature action
Into in desorption flue gas, the desorption exhaust gas containing organic pollutant and the soil by thermal desorption processing are formed；
(4) dedusting: the desorption exhaust gas containing organic pollutant that step (3) is obtained, which enters electricity-bag complex dust collector, to carry out
Dedusting separates the particulate matter in exhaust gas, generates and exhaust gas is desorbed containing organic pollutant through dedusting；
(5) heat exchange: by step (4) exchanging heat in floating head type containing organic pollutant desorption exhaust gas and combustion-supporting gas through dedusting
Indirect heat exchange is carried out in device, the desorption exhaust gas containing organic pollutant through dedusting is passed through combustion-supporting gas and exchanges heat in movable tube sheets heat exchanger
Heat is recycled in cooling, reduces the temperature of the desorption exhaust gas containing organic pollutant, improves combustion-supporting gas temperature, and with the shape of condensed water
The moisture in exhaust gas is desorbed containing organic pollutant in formula separation, the combustion-supporting gas by heating to step (1), combustion-supporting gas and step
(1) identical；
(6) absorption cleaning: will be by step (5) processing containing organic pollutant desorption exhaust gas and fresh fuel oilstone oil wash
Oil counter current contacting in tubulent contact tower, live oil washing oil is as absorbent in 7m/s, tubulent contact tower for empty tower gas velocity control, in exhaust gas
Organic pollutant by fuel oil absorption cleaning, ethyl-benzene level is lower than 0.02g/m in purification gas3, meet national emission standard,
Exhaust gas qualified discharge；Heating power burns in fuel oil return step (1) containing organic pollutant ethylbenzene；
(7) soil is cooling: the soil by step (3) by thermal desorption processing enters water-cooling spiral conveying through star-like discharging device
Machine cools down, and then the condensed water obtained in step (5) carries out humidification discharge, and ethyl-benzene level reaches in the soil that discharges
The limit value requirement of site remediation target 1.92mg/kg, ethylbenzene removal rate reach 99.7%.
Embodiment 6
A kind of system thermal desorption processing organic polluted soil and exhaust-gas treatment is desorbed, is with the difference of embodiment 1:
Heating power incinerator 1 is steam atomizing burner, and deduster 7 is electricity-bag complex dust collector, and heat exchange/steam-water separator 8 is floating head type
Heat exchanger, absorbing reaction device 10 are tubulent contact tower.
Certain pollution by pesticides place organic polluted soil, soil pollutant ethyl-benzene level are 642.35mg/kg, and the soil is through pre-
Moisture content is 14%, partial size 12mm after processing system, handles organic polluted soil using the thermal desorption of the present embodiment and desorption is useless
The system of gas disposal carries out thermal desorption and desorption exhaust-gas treatment, the specific steps are as follows:
(1) heating power burns: fuel oil petroleum washing oil and combustion-supporting gas being respectively enterd air atomizing oil burner, carried out
Hybrid thermodynamic burns the high-temperature flue gas that 5s generates 1450 DEG C, oxygen-containing gas fraction 65%, nitrogenous gas fraction in combustion-supporting gas
35%；
(2) flue gas temperature adjustment: high-temperature flue gas and room temperature under nitrogen that step (1) generates are mixed in desorption flue gas register
Conjunction obtains thermal desorption flue gas, by change high-temperature flue gas and gas at normal temperature flow ratio, by thermal desorption flue-gas temperature adjust to
500℃；
(3) thermal desorption: ethylbenzene contaminated soil is put into fixed bed reactors, by the thermal desorption cigarette after step (2) temperature adjustment
Ethylbenzene contaminated soil to be processed carries out reverse contact 22min in gas and fixed bed reactors, and ethylbenzene is desorbed under high temperature action
Into in desorption flue gas, the desorption exhaust gas containing organic pollutant and the soil by thermal desorption processing are formed；
(4) dedusting: the desorption exhaust gas containing organic pollutant that step (3) is obtained, which enters electricity-bag complex dust collector, to carry out
Dedusting separates the particulate matter in exhaust gas, generates and exhaust gas is desorbed containing organic pollutant through dedusting；
(5) heat exchange: by step (4) exchanging heat in floating head type containing organic pollutant desorption exhaust gas and combustion-supporting gas through dedusting
Indirect heat exchange is carried out in device, the desorption exhaust gas containing organic pollutant through dedusting is passed through combustion-supporting gas and exchanges heat in movable tube sheets heat exchanger
Heat is recycled in cooling, reduces the temperature of the desorption exhaust gas containing organic pollutant, improves combustion-supporting gas temperature, and with the shape of condensed water
The moisture in exhaust gas is desorbed containing organic pollutant in formula separation, the combustion-supporting gas by heating to step (1), combustion-supporting gas and step
(1) identical；
(6) absorption cleaning: will be by step (5) processing containing organic pollutant desorption exhaust gas and fresh fuel oilstone oil wash
Oil counter current contacting in tubulent contact tower, live oil washing oil is as absorbent in 5m/s, tubulent contact tower for empty tower gas velocity control, in exhaust gas
Organic pollutant by fuel oil absorption cleaning, ethyl-benzene level is lower than 0.02g/m in purification gas3, meet national emission standard,
Exhaust gas qualified discharge；Heating power burns in fuel oil return step (1) containing organic pollutant ethylbenzene；
(7) soil is cooling: the soil by step (3) by thermal desorption processing enters water-cooling spiral conveying through star-like discharging device
Machine cools down, and then the condensed water obtained in step (5) carries out humidification discharge, and ethyl-benzene level reaches in the soil that discharges
The limit value requirement of site remediation target 1.92mg/kg, ethylbenzene removal rate reach 99.7%.
Embodiment 7
A kind of system thermal desorption processing organic polluted soil and exhaust-gas treatment is desorbed, is with the difference of embodiment 1:
Thermal desorption reactor 1 is fluidized-bed reactor, and deduster 7 is impingement dust collector, and heat exchange/steam-water separator 8 is that U-tube formula is changed
Hot device, absorbing reaction device 10 are sieve-plate tower.
Certain chemical industry place organic polluted soil, soil pollutant petroleum hydrocarbon compound (TPH) content are 520.23mg/kg,
Moisture content is 14%, partial size 12mm after the preprocessed system of the soil, utilizes the thermal desorption processing organic contamination soil of the present embodiment
Earth and the system that exhaust-gas treatment is desorbed carry out thermal desorption and desorption exhaust-gas treatment, the specific steps are as follows:
(1) heating power burns: fuel-oil coking oil wash oil and combustion-supporting gas being respectively enterd mechanical atomization oil burner, carried out
Hybrid thermodynamic burns the high-temperature flue gas that 6s generates 950 DEG C, oxygen-containing gas fraction 75%, nitrogenous gas fraction in combustion-supporting gas
25%；
(2) flue gas temperature adjustment: high-temperature flue gas and room temperature under nitrogen that step (1) generates are mixed in desorption flue gas register
Conjunction obtains thermal desorption flue gas, by change high-temperature flue gas and gas at normal temperature flow ratio, by thermal desorption flue-gas temperature adjust to
500℃；
(3) thermal desorption: petroleum hydrocarbon compound (TPH) contaminated soil is put into fluidized-bed reactor, by step (2) temperature adjustment
Thermal desorption flue gas afterwards is inversely contacted with petroleum hydrocarbon compound (TPH) contaminated soil to be processed in fluidized-bed reactor
18min, petroleum hydrocarbon compound (TPH) are desorbed into desorption flue gas under high temperature action, form the desorption containing organic pollutant
Exhaust gas and the soil handled by thermal desorption；
(4) dedusting: the desorption exhaust gas containing organic pollutant that step (3) is obtained enters impingement dust collector and removes
Dirt separates the particulate matter in exhaust gas, generates and exhaust gas is desorbed containing organic pollutant through dedusting；
(5) heat exchange: by step (4) exchanging heat in floating head type containing organic pollutant desorption exhaust gas and combustion-supporting gas through dedusting
Indirect heat exchange is carried out in device, the desorption exhaust gas containing organic pollutant through dedusting is passed through combustion-supporting gas and changes in U-shaped pipe heat exchanger
Heat drop temperature recycles heat, reduces the temperature of the desorption exhaust gas containing organic pollutant, improves combustion-supporting gas temperature, and with condensed water
The moisture in exhaust gas is desorbed containing organic pollutant in form separation, the combustion-supporting gas by heating to step (1), combustion-supporting gas and step
Suddenly (1) it is identical；
(6) absorption cleaning: will be by step (5) processing containing organic pollutant desorption exhaust gas and fresh fuel oil coke oil wash
Oil counter current contacting in sieve-plate tower, empty tower gas velocity control in 0.8m/s, sieve-plate tower fresh tar washing oil as absorbent, exhaust gas
In organic pollutant by fuel oil absorption cleaning, petroleum hydrocarbon compound (TPH) content is lower than 0.02g/m in purification gas3, symbol
Close national emission standard, exhaust gas qualified discharge；Fuel oil return step containing organic pollutant petroleum hydrocarbon compound (TPH)
(1) heating power burns in；
(7) soil is cooling: the soil by step (3) by thermal desorption processing enters water-cooling spiral conveying through star-like discharging device
Machine cools down, and then the condensed water obtained in step (5) carries out humidification discharge, petroleum hydrocarbon compound in the soil that discharges
(TPH) content reaches the limit value requirement of site remediation target 1.56mg/kg, and petroleum hydrocarbon compound (TPH) removal rate reaches
99.7%。
Embodiment 8
A kind of system thermal desorption processing organic polluted soil and exhaust-gas treatment is desorbed, is with the difference of embodiment 1:
Heating power incinerator 1 is air atomizing oil burner, and thermal desorption reactor 4 is moving-burden bed reactor, and deduster 7 is washer,
Heat exchange/steam-water separator 8 is U-shaped pipe heat exchanger, and absorbing reaction device 10 is sieve-plate tower.
Certain chemical industry place organic polluted soil, soil pollutant chlorinated organics (CVOCs) content are 758.15mg/kg,
Moisture content is 15%, partial size 17mm after the preprocessed system of the soil, utilizes the thermal desorption processing organic contamination soil of the present embodiment
Earth and the system that exhaust-gas treatment is desorbed carry out thermal desorption and desorption exhaust-gas treatment, the specific steps are as follows:
(1) heating power burns: fuel oil methanol and combustion-supporting gas being respectively enterd air atomizing oil burner, mixed
Heating power burns the high-temperature flue gas that 8s generates 1100 DEG C, oxygen-containing gas fraction 85%, nitrogenous gas fraction 15% in combustion-supporting gas；
(2) flue gas temperature adjustment: high-temperature flue gas and room temperature under nitrogen that step (1) generates are mixed in desorption flue gas register
Conjunction obtains thermal desorption flue gas, by change high-temperature flue gas and gas at normal temperature flow ratio, by thermal desorption flue-gas temperature adjust to
820℃；
(3) thermal desorption: chlorinated organics (CVOCs) contaminated soil is put into moving-burden bed reactor, by step (2) temperature adjustment
Thermal desorption flue gas afterwards is inversely contacted with chlorinated organics (CVOCs) contaminated soil to be processed in moving-burden bed reactor
25min, chlorinated organics (CVOCs) are desorbed into desorption flue gas under high temperature action, form the desorption containing organic pollutant
Exhaust gas and the soil handled by thermal desorption；
(4) dedusting: the desorption exhaust gas containing organic pollutant that step (3) is obtained enters washer, separates in exhaust gas
Particulate matter generates and exhaust gas is desorbed containing organic pollutant through dedusting；
(5) heat exchange: by step (4) exchanging heat in tube-sheet type containing organic pollutant desorption exhaust gas and combustion-supporting gas through dedusting
Indirect heat exchange is carried out in device, the desorption exhaust gas containing organic pollutant through dedusting is passed through combustion-supporting gas and exchanges heat in tube-sheet heat exchanger
Heat is recycled in cooling, reduces the temperature of the desorption exhaust gas containing organic pollutant, improves combustion-supporting gas temperature, and with the shape of condensed water
The moisture in exhaust gas is desorbed containing organic pollutant in formula separation, the combustion-supporting gas by heating to step (1), combustion-supporting gas and step
(1) identical；
(6) absorption cleaning: will existing containing organic pollutant desorption exhaust gas and fresh fuel oil methanol by step (5) processing
Counter current contacting in sieve-plate tower, the empty tower gas velocity control organic dirt of fresh methanol as absorbent, in exhaust gas in 3m/s, sieve-plate tower
Object is contaminated by fuel oil absorption cleaning, and chlorinated organics (CVOCs) content is lower than 0.02g/m in purification gas3, meet national discharge
Standard, exhaust gas qualified discharge；Heating power is burnt in fuel oil return step (1) containing organic pollutant chlorinated organics (CVOCs)
It burns；
(7) soil is cooling: the soil by step (3) by thermal desorption processing enters water-cooling spiral conveying through star-like discharging device
Machine cools down, and then the condensed water obtained in step (5) carries out humidification discharge, chlorinated organics in the soil that discharges
(CVOCs) content reaches the limit value requirement of site remediation target 1.52mg/kg, and chlorinated organics (CVOCs) removal rate reaches
99.8%。
Embodiment 9
A kind of system thermal desorption processing organic polluted soil and exhaust-gas treatment is desorbed, is with the difference of embodiment 1:
Heating power incinerator 1 is air atomizing oil burner, and thermal desorption reactor 4 is moving-burden bed reactor, and deduster 7 is washer,
Heat exchange/steam-water separator 8 is fixed tube-sheet exchanger, and absorbing reaction device 10 is sieve-plate tower.
Certain chemical industry place organic polluted soil, soil pollutant chlorinated organics (CVOCs) content are 758.15mg/kg,
Moisture content is 15%, partial size 17mm after the preprocessed system of the soil, utilizes the thermal desorption processing organic contamination soil of the present embodiment
Earth and the system that exhaust-gas treatment is desorbed carry out thermal desorption and desorption exhaust-gas treatment, the specific steps are as follows:
(1) heating power burns: fuel oil methanol and combustion-supporting gas being respectively enterd air atomizing oil burner, mixed
Heating power burns the high-temperature flue gas that 7s generates 1150 DEG C, oxygen-containing gas fraction 85%, nitrogenous gas fraction 15% in combustion-supporting gas；
(2) flue gas temperature adjustment: high-temperature flue gas and room temperature under nitrogen that step (1) generates are mixed in desorption flue gas register
Conjunction obtains thermal desorption flue gas, by change high-temperature flue gas and gas at normal temperature flow ratio, by thermal desorption flue-gas temperature adjust to
700℃；
(3) thermal desorption: chlorinated organics (CVOCs) contaminated soil is put into moving-burden bed reactor, by step (2) temperature adjustment
Thermal desorption flue gas afterwards is inversely contacted with chlorinated organics (CVOCs) contaminated soil to be processed in moving-burden bed reactor
24min, chlorinated organics (CVOCs) are desorbed into desorption flue gas under high temperature action, form the desorption containing organic pollutant
Exhaust gas and the soil handled by thermal desorption；
(4) dedusting: the desorption exhaust gas containing organic pollutant that step (3) is obtained enters washer, separates in exhaust gas
Particulate matter generates and exhaust gas is desorbed containing organic pollutant through dedusting；
(5) exhaust gas and combustion-supporting gas heat exchange: is desorbed in fixed tube sheet type containing organic pollutant through dedusting in step (4)
Indirect heat exchange is carried out in heat exchanger, the desorption exhaust gas containing organic pollutant through dedusting is passed through combustion-supporting gas and exchanges heat in fixed tube sheet type
Heat exchange cooling in device, recycles heat, reduces the temperature of the desorption exhaust gas containing organic pollutant, improves combustion-supporting gas temperature, and with cold
The moisture in exhaust gas is desorbed containing organic pollutant in the form separation of condensate, the combustion-supporting gas by heating to step (1), combustion-supporting gas
Body is identical as step (1)；
(6) absorption cleaning: will existing containing organic pollutant desorption exhaust gas and fresh fuel oil methanol by step (5) processing
Counter current contacting in sieve-plate tower, the empty tower gas velocity control organic dirt of fresh methanol as absorbent, in exhaust gas in 2m/s, sieve-plate tower
Object is contaminated by fuel oil absorption cleaning, and chlorinated organics (CVOCs) content is lower than 0.02g/m in purification gas3, meet national discharge
Standard, exhaust gas qualified discharge；Heating power is burnt in fuel oil return step (1) containing organic pollutant chlorinated organics (CVOCs)
It burns；
(7) soil is cooling: the soil by step (3) by thermal desorption processing enters water-cooling spiral conveying through star-like discharging device
Machine cools down, and then the condensed water obtained in step (5) carries out humidification discharge, chlorinated organics in the soil that discharges
(CVOCs) content reaches the limit value requirement of site remediation target 1.52mg/kg, and chlorinated organics (CVOCs) removal rate reaches
99.8%。
Embodiment 10
A kind of system thermal desorption processing organic polluted soil and exhaust-gas treatment is desorbed, is with the difference of embodiment 1:
Heating power incinerator is air atomizing oil burner, and thermal desorption reactor is moving-burden bed reactor, and deduster is washer, is changed
Heat/steam-water separator 8 is fixed tube-sheet exchanger, and absorbing reaction device is sieve-plate tower.
Certain chemical industry place organic polluted soil, soil pollutant chlorinated organics (CVOCs) content are 758.15mg/kg,
Moisture content is 15%, partial size 17mm after the preprocessed system of the soil, utilizes the thermal desorption processing organic contamination soil of the present embodiment
Earth and the system that exhaust-gas treatment is desorbed carry out thermal desorption and desorption exhaust-gas treatment, the specific steps are as follows:
(1) heating power burns: fuel oil diesel oil and coking washing oil being mixed in the ratio of 1:1, respectively enterd with combustion-supporting gas
Air atomizing oil burner carries out hybrid thermodynamic and burns the high-temperature flue gas that 7s generates 1000 DEG C, oxygen-containing gas in combustion-supporting gas
Fraction 85%, nitrogenous gas fraction 15%；
(2) flue gas temperature adjustment: high-temperature flue gas and room temperature under nitrogen that step (1) generates are mixed in desorption flue gas register
Conjunction obtains thermal desorption flue gas, by change high-temperature flue gas and gas at normal temperature flow ratio, by thermal desorption flue-gas temperature adjust to
700℃；
(3) thermal desorption: chlorinated organics (CVOCs) contaminated soil is put into moving-burden bed reactor, by step (2) temperature adjustment
Thermal desorption flue gas afterwards is inversely contacted with chlorinated organics (CVOCs) contaminated soil to be processed in moving-burden bed reactor
24min, chlorinated organics (CVOCs) are desorbed into desorption flue gas under high temperature action, form the desorption containing organic pollutant
Exhaust gas and the soil handled by thermal desorption；
(4) dedusting: the desorption exhaust gas containing organic pollutant that step (3) is obtained enters washer, separates in exhaust gas
Particulate matter generates and exhaust gas is desorbed containing organic pollutant through dedusting；
(5) heat exchange: by step (4) exchanging heat in tube-sheet type containing organic pollutant desorption exhaust gas and combustion-supporting gas through dedusting
Indirect heat exchange is carried out in device, the desorption exhaust gas containing organic pollutant through dedusting is passed through combustion-supporting gas and exchanges heat in tube-sheet heat exchanger
Heat is recycled in cooling, reduces the temperature of the desorption exhaust gas containing organic pollutant, improves combustion-supporting gas temperature, and with the shape of condensed water
The moisture in exhaust gas is desorbed containing organic pollutant in formula separation, the combustion-supporting gas by heating to step (1), combustion-supporting gas and step
(1) identical；
(6) absorption cleaning: will existing containing organic pollutant desorption exhaust gas and fresh mix fuel oil by step (5) processing
Counter current contacting in sieve-plate tower, fresh mix fuel oil is as absorbent in 2m/s, sieve-plate tower for empty tower gas velocity control, in exhaust gas
Organic pollutant is mixed fuel oil absorption cleaning, and chlorinated organics (CVOCs) content is lower than 0.02g/m in purification gas3, symbol
Close national emission standard, exhaust gas qualified discharge；Fuel oil return step containing organic pollutant chlorinated organics (CVOCs)
(1) heating power burns in；
(7) soil is cooling: the soil by step (3) by thermal desorption processing enters water-cooling spiral conveying through star-like discharging device
Machine cools down, and then the condensed water obtained in step (5) carries out humidification discharge, chlorinated organics in the soil that discharges
(CVOCs) content reaches the limit value requirement of site remediation target 1.52mg/kg, and chlorinated organics (CVOCs) removal rate reaches
99.8%。
Embodiment described above is only that the preferred embodiments of the present invention are described, not practical new to this
The range of type is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this reality
The various changes and improvements made with novel technical solution each fall within the protection scope that the utility model claims book determines
It is interior.
Claims (7)
1. a kind of system thermal desorption processing organic polluted soil and exhaust-gas treatment is desorbed, which is characterized in that burned including heating power
Device, desorption flue gas register, thermal desorption reactor, deduster, heat exchange/steam-water separator, absorbing reaction device, star discharging
Device, soil cooler, heating power incinerator, desorption flue gas register, thermal desorption reactor, deduster, heat exchange/steam-water separation
Device, absorbing reaction device are sequentially connected and are equipped between connecting two-by-two valve, desorption flue gas register also with gas at normal temperature pipe
Road is connected and is equipped with valve between the two, and thermal desorption reactor is also connected with star-like discharging device and is equipped with valve, star between the two
Shape discharger is connected with soil cooler, and heat exchange/steam-water separator is also respectively connected with combustion-supporting gas pipeline and heating power incinerator
And valve is equipped between connection two-by-two, absorbing reaction device is also connected with heating power incinerator and is equipped with valve between the two, absorbs
Fuel oil-in is additionally provided on reactor.
2. system thermal desorption processing organic polluted soil according to claim 1 and exhaust-gas treatment is desorbed, which is characterized in that
The heating power incinerator be mechanical atomization oil burner, rotary-cup type atomized fuel burner, air atomizing oil burner or
Steam atomizing burner.
3. system thermal desorption processing organic polluted soil according to claim 1 and exhaust-gas treatment is desorbed, which is characterized in that
The thermal desorption reactor is rotary kiln, fixed bed reactors, fluidized-bed reactor or moving-burden bed reactor.
4. system thermal desorption processing organic polluted soil according to claim 1 and exhaust-gas treatment is desorbed, which is characterized in that
The deduster be bag filter, electrostatic precipitator, cyclone dust collectors, electricity-bag complex dust collector, spray column, washer or
Impingement dust collector.
5. system thermal desorption processing organic polluted soil according to claim 1 and exhaust-gas treatment is desorbed, which is characterized in that
Heat exchange/the steam-water separator is double pipe heat exchanger, plate heat exchanger, fixed tube-sheet exchanger, movable tube sheets heat exchanger or U
Type pipe heat exchanger.
6. system thermal desorption processing organic polluted soil according to claim 1 and exhaust-gas treatment is desorbed, which is characterized in that
The absorbing reaction device is packed tower, tubulent contact tower or sieve-plate tower, and packed tower is used as absorbing reaction device, empty tower gas velocity for 0.1 ~
2.0m/s；Tubulent contact tower is absorbing reaction device, and empty tower gas velocity is 1.0 ~ 7.0m/s；Sieve-plate tower is as absorbing reaction device, empty tower gas velocity
For 0.8 ~ 3.0m/s.
7. system thermal desorption processing organic polluted soil according to claim 1 and exhaust-gas treatment is desorbed, which is characterized in that
The soil cooler is water-cooled screw conveyor.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108714621A (en) * | 2018-05-23 | 2018-10-30 | 昆明理工大学 | A kind of thermal desorption handles the method and system of organic polluted soil and desorption exhaust-gas treatment |
| CN110369475A (en) * | 2019-07-17 | 2019-10-25 | 华东师范大学 | Quinolone antibiotics contaminated soil indirect thermal desorption processing method |
| CN111545558A (en) * | 2020-05-26 | 2020-08-18 | 上海化工研究院有限公司 | Method for treating organic contaminated soil through thermal desorption |
-
2018
- 2018-05-23 CN CN201820768726.3U patent/CN208643669U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108714621A (en) * | 2018-05-23 | 2018-10-30 | 昆明理工大学 | A kind of thermal desorption handles the method and system of organic polluted soil and desorption exhaust-gas treatment |
| CN110369475A (en) * | 2019-07-17 | 2019-10-25 | 华东师范大学 | Quinolone antibiotics contaminated soil indirect thermal desorption processing method |
| CN111545558A (en) * | 2020-05-26 | 2020-08-18 | 上海化工研究院有限公司 | Method for treating organic contaminated soil through thermal desorption |
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