CN108906869A - A kind of contaminated soil in-situ heat repair system and method using distributed energy - Google Patents
A kind of contaminated soil in-situ heat repair system and method using distributed energy Download PDFInfo
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- CN108906869A CN108906869A CN201810918945.XA CN201810918945A CN108906869A CN 108906869 A CN108906869 A CN 108906869A CN 201810918945 A CN201810918945 A CN 201810918945A CN 108906869 A CN108906869 A CN 108906869A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/005—Extraction of vapours or gases using vacuum or venting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
- B09C1/062—Reclamation of contaminated soil thermally by using electrode or resistance heating elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Abstract
The invention patent proposes a kind of contaminated soil in-situ heat repair system and method using distributed energy, indirect heating reparation in situ is carried out to contaminated soil by using high-temperature flue gas caused by gas internal-combustion engine and electric power, the combined use of high-temperature flue gas and resistance heating, it can carry out that flue gas hot repair is multiple and resistance heat reparation simultaneously, formation is provided multiple forms of energy to complement each other mechanism, has double shield.
Description
Technical field
The invention belongs to environment remediation fields, and in particular to a kind of contaminated soil in-situ heat repair system and method.
Background technique
Soil is one of element most basic in the ecosystem, has great importance to survival and development of mankind, protects
Soil environment is the important content for promoting Ecological Civilization Construction and safeguarding ecological safety.Currently, China's soil environment overall state
It allows of no optimist, according to publication in 2014《National contaminated soil status investigation bulletin》, the whole country in have 16.1% investigation
Site pollutant is exceeded, and soil contamination problem is increasingly prominent and has become current important one of environmental problem.
Yuan Hehui of the soil as environmental contaminants, has that pollutant sources are wide, type is more, the old and new's pollutant and deposit, nothing
Type and organic type pollution it is compound there are the characteristics of.Wherein, inorganic pollution is with the huge sum of money such as cadmium, mercury, arsenic, copper, lead, chromium, zinc, nickel
Based on category, organic pollutant category is various, the volatile organic contaminants such as halogenated hydrocarbons such as benzene homologues, trichloro ethylene such as including toluene
With the half volatile organic contaminants such as polycyclic aromatic hydrocarbon, Polychlorinated biphenyls, organo-chlorine pesticide etc..
From the perspective of contamination control, soil remediation processing technique thinking can be divided into following two categories：(1) it removes, degrade
Pollutant in soil reduces its absolute content, reduces environmental risk；(2) change the occurrence patterns of pollutant in the soil, drop
Its low transportable property and bioavailability in the environment, controls its Transport And Transformation into animals and plants, water body, atmosphere.
The research of soil remediation processing have been relatively mature for many years, portion of techniques has obtained extensive engineer application.
Due to pollutant in soil complicated composition, distinct, different repair process technologies can be used for various types pollutant,
Peripheral doses technology, chemical remediation technology and bioremediation technology three categories can be substantially divided into.
Peripheral doses technology includes soil displacement, the soil isolation, melten glass, electro reclamation for heavy metal pollution
Deng, and for technologies such as thermal desorption, the soil vapor extractions (SVE) of organic type pollution.Chemical remediation technology includes for weight
The solidification and stabilization of metallic pollution, Soil leaching technology, and the electrochemical rehabilitation for organic pollutant, soil cleaning, chemistry
The technologies such as oxidation.It is biological prosthetic, it is divided into microorganism remediation and phytoremediation two major classes.At present in soil remediation engineering, frequently with
Solidification and stabilization technology restoration of soil polluted by heavy metal, using soil vapor extraction, heat treatment technics renovation of organic pollution soil.
It is a kind of also to carry out original position soil reparation using biological treatment or chemical treatment method.By injecting chemistry to underground
Reactant or biodegradable medium improve soil pollution environment, still, such general high investment of method, for deep soil and
It is more difficult that contaminated soil pollutant is reduced to achievement level, thereby increases and it is possible to form secondary pollution.
A kind of in-situ remediation method using soil vapor extraction technology (also known as soil vapor extraction) using vacuum pump on ground
Negative pressure is generated in lower soil, rush causes air flow through contaminated soil hole, and pollutant can be issued from extraction well by carrying volatility with half
Discharge, and be disposed on ground, to reduce the total amount of pollutant in soil.The technology can join with air injection technique
With, it is mainly used for repairing the contaminated soil of non-saturated region (aeration zone), but it is higher for the tonicity requirements of soil itself, have one
Fixed limitation.
A kind of in-situ method is directly to be inserted into contaminated soil using electrode to carry out reparation electromotion repairing technique, and such method exists
It is carried out in wet environment, needs to consider the polarity of the pollutant of soil, it is lower to repair temperature at 100 DEG C or so for heating temperature, but repairs
The multiple period is longer.
Whether needed to excavate soil according to soil remediation, also soil restoring technology can be divided into based technique for in-situ remediation and dystopy
Recovery technique.Generally, for high concentration contaminated soil can not generally be backfilled based on showering technology, after reparation after
It is continuous to do soil use；For volatile organic matter contaminated site, the process for excavating displacement transport easily leads to pollutant to ring
The secondary pollution in border.
Summary of the invention
The invention patent proposes a kind of contaminated soil in-situ heat repair system and method using distributed energy, by making
High-temperature flue gas and electric power caused by gas internal-combustion engine carry out indirect heating reparation in situ to contaminated soil.
Technical solution provided by the invention is：
A kind of contaminated soil in-situ heat repair system using distributed energy, including gas internal-combustion engine power generation and flue gas supply
Answer system, contaminated soil resistance heating and flue gas combination repair system, polluted gas extracting collection and smoke processing system；
Gas internal-combustion engine power generation and flue gas supply system include gas internal-combustion engine, generator, transformer, lube oil cooler, jacket water
Cooler, heat exchanger, injectable media container, high pressure syringe pump, power supply line, telegram in reply route, injectable media pipeline, temperature and pressure
The transmission of power test data, smoke-exhaust pipeline, extraction stain property management net；Contaminated soil resistance heating and flue gas combination repair system
Including hyperthermia radiation casing, U-shaped stratie, temperature or pressure test well, pollutant vacuum extraction well, injector well, cigarette
Gas exclusion sleeve, flue gas injection cannula, resistance heater, flue gas heater；Polluted gas extracting is collected and smoke processing system
It is pumped including vacuum extraction, high-temperature thermal oxidation device, spraying condenser, gas-liquid separator, activated carbon adsorption device, cloth bag drifting dust
Device, flue gas desulfurization and denitrification device, blowdown stack, filter, hydrotreater；
Natural gas and air, which enter in the cylinder of gas internal-combustion engine, to burn, and driving gas internal-combustion engine piston acting, piston drives
The dynamic generator being connected with crankshaft-and-connecting-rod, generates electricity, and institute's electricity is by the adjustable supply resistance heater of transformer
Power controls resistance heating temperature, and the electric power after transformation is by power supply line, telegram in reply route respectively at connector lug resistance
The positive and negative anodes of heater wiring are connected, and the acting final vacuum of gas internal-combustion engine piston is heated by smoke discharging pipe into flue gas soil
Device injection port is exchanged heat by heat exchanger and cooler, cylinder sleeve water cooler, is deposited in a reservoir, is led to for changing hot medium
High-pressure injection is crossed to be pumped into injector well；
The contaminated soil layer for needing to repair, water-bearing layer use vacuum extraction pumping before carrying out Soil Thermal reparation in advance
Take the Free water in contaminated soil, reduce water level line, for pollutant chemical bonding water and soil particle hygroscopic moisture, use
Heater carries out the boiling point for being heated above water, realizes the evaporation of water, needs carrying out hot rehabilitating soil area top using covering
Layer is sealed,
Beat heated well in advance using Sonic drill, be then inserted resistance heater, flue gas heater, heated well it is straight
Diameter is greater than the diameter of heater, after heater is put into heated well, using pebble and gravel, is evenly spaced in heater
Around, fill the gap of heated well；
It is similarly dug a well in advance using Sonic drill, pollutant vacuum extraction well is inserted, pebble and gravel are used
Stone plugs the gap,
The medium of fluid media (medium) injection is water, air and the catalysts after exchanging heat with heat exchanger, passes through high-pressure injection
Pump squeezes into injector well,
Temperature and pressure test well, by using temperature sensor and pressure sensor, monitoring and control contaminated soil layer
Temperature and pressure vacuum degree, temperature and pressure signal are acquired by data and converting means is sent to monitor supervision platform and is divided
Analysis, and then adjust the vacuum degree in flue gas, resistance heating temperature and contaminated soil；
The pollutant come is pumped out from vacuum extraction, and high-temperature thermal oxidation device, pollutant are transmitted to by extraction stain property management net
By high-temperature thermal oxidation device to the further oxygenolysis of pollutant, gaseous pollutant in spraying condenser by further cooling down
Pollutant temperature is reduced, fluid after cooling enters in gas-liquid separator, the separated from contaminants of liquid is come out, is then passed through again
Activated carbon adsorption device, the fluid contaminants come out from spraying condenser, gas-liquid separator and activated carbon adsorption device are first
It is introduced into filter, subsequently into being handled in hydrotreater, the flue gas that is come out from smoke-exhaust pipeline and is filled from activated carbon adsorption
The gaseous pollutant for setting out converges in bag filter, reduces the dust in gas, and mixed gas is passed through flue gas desulfurization
Denitrification apparatus reduces sulfide and itrated compound concentration in gas, finally passes through the gas of chimney emission compliance.
The flue gas heater includes flue gas emission casing, flue gas injection cannula, and flue gas is injected from flue gas injection cannula,
Its bottom opening, flue gas are excluded along flue gas injection-tube outside wall surface and smoke discharge pipe inner wall, and are carried out convection current wherein and changed
Heat is by heat transfer entrained by high-temperature flue gas to heat exchange wall surface and then passes to soil.
The resistance heater includes high-temperature vacuum radiation casing, U-shaped stratie and upper flange and positive and negative anodes
The space that connecting line, vacuum radiation casing and flange and heating element form is vacuum area, in U-shaped stratie inside
The heart has heater strip, and material is the alloy material of Ni80 alloy, the softening of iron cadmium magnesium alloy high temperature resistant and forceful electric power thermal resistance；Use magnesia
Material filling.
The invention patent proposes a kind of novel contaminated soil in-situ heat repair system and method, by using combustion gas internal combustion
High-temperature flue gas and electric power caused by machine carry out indirect heating reparation in situ, the knot of high-temperature flue gas and resistance heating to contaminated soil
It closes and uses, can carry out that flue gas hot repair is multiple and resistance heat reparation simultaneously, formation is provided multiple forms of energy to complement each other mechanism, with double shield.
Detailed description of the invention
Fig. 1 is the contaminated soil in-situ heat repair system schematic diagram of distributed energy.
Fig. 2 is it is shown that a kind of flue gas well, electric heating well and extraction well horizontal layout mode figure.
Wherein have：
Natural gas 01, air 02, flue gas 03, power supply line 04, telegram in reply route 05, injectable media pipeline 06, temperature and pressure
Power test data transmission 07, smoke evacuation 08, extraction stain property management net 09；
Gas internal-combustion engine 10, generator 11, transformer 12, lube oil cooler 13, cylinder sleeve water cooler 14, heat exchanger
15, injectable media container 16, high pressure syringe pump 17；
Contaminated soil layer 20, water-bearing layer 21, cement cover board 22；
Pebble and gravel 30, hyperthermia radiation casing 31, U-shaped stratie 32, temperature or pressure test well 33,
Pollutant vacuum extraction well 34, injector well 35, flue gas emission casing 36, flue gas injection cannula 37, resistance heater 38, flue gas adds
Hot device 39；
Vacuum extraction pump 40, high-temperature thermal oxidation device 41, spraying condenser 42, gas-liquid separator 43, activated carbon adsorption dress
Set 44, cloth bag dust blower 45, flue gas desulfurization and denitrification device 46, blowdown stack 47, filter 48, hydrotreater 49.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing.
Such as Fig. 1, a kind of the contaminated soil hot repair complex system and method for combustion gas distributed energy,
Combustion gas distributed energy selects gas internal-combustion engine 10, and natural gas 01 and air 02 enter in the cylinder of gas internal-combustion engine
Burning, driving 10 piston of gas internal-combustion engine acting, piston drive the generator 11 being connected with crankshaft-and-connecting-rod, generate electricity.Institute
Electricity, according to the of different sizes of internal combustion engine, voltage class can be divided into 0.4kV and 10kV, by the adjustable supply of transformer 12
The power of resistance heater 32 controls resistance heating temperature.Electric power after transformation passes through power supply line 04, telegram in reply route
05 respectively at 32 wiring of connector lug resistance heater positive and negative anodes be connected.The acting final vacuum of 10 piston of gas internal-combustion engine, exhaust temperature
Degree is 500 DEG C, by smoke discharging pipe 03, into 37 injection port of flue gas soil heater.Flue gas temperature can pass through at this time
Air 02 excess coefficient is adjusted, and can also be adjusted by increasing and decreasing the flow of natural gas 01.Lube oil cooler 13, cylinder sleeve
Water cooler 14 is the appurtenances of gas internal-combustion engine 10, passes through heat exchanger 15 and lube oil cooler 13, cylinder sleeve water cooler
14 exchange heat, and for changing hot medium there are in injectable media container 16, which can be for water, catalysts either
Air.It is sent into injector well 35 by high pressure syringe pump 17.Injection water is conducive to improve underground pollution soil permeability in injector well
Property and extraction well formed access；It is passed through air or reflects that catalyst is conducive to accelerate the oxidation and parsing of soil pollutant.When
Make that container 16 can not be used for air.
The contaminated soil layer 20 for needing to repair, water-bearing layer 21.Before carrying out Soil Thermal reparation, it can be taken out in advance using vacuum
Propose pumping and take Free water in contaminated soil, reduce water level line, can reduce natural gas using energy saving.For with pollutant
Chemical bonding water and soil particle hygroscopic moisture, the boiling point for being heated above water is carried out using heater, realizes the evaporation of water.Into
The hot rehabilitating soil area top of row needs to be sealed using coating 22.Coating uses cement, can also increase below cement
The heat-barrier materials such as one layer of asbestos are added to form combined coating.There are four effects for coating：1) soil hot repair can effectively be hindered
The contaminant gases infiltrated during multiple reduce secondary pollution；2) it is able to carry out heat-insulated, prevents soil surface temperature mistake
It is high；3) support platform can be provided for heating equipment；4) rainwater can be hindered to enter repaired contaminated soil region.
Heated well is beaten in advance using Sonic drill, is then inserted resistance heater 38, flue gas heater 39, Sonic drill
The diameter dug a well is greater than the diameter of heater, heater is put into after beaten well, using pebble and gravel 30,
Even row fills the gap of heated well not around heater.Pebble and gravel 30 have stronger thermal conductivity.
Flue gas heater 39 includes flue gas emission casing 36, flue gas injection cannula 37, and flue gas is from flue gas injection cannula 37
Injection, bottom opening, flue gas are excluded along flue gas injection-tube outside wall surface and smoke discharge pipe inner wall, and are carried out wherein pair
Stream heat exchange is by heat transfer entrained by high-temperature flue gas to heat exchange wall surface and then passes to soil.Flue gas bush material is recommended to use ND
Stainless steel, the material at high temperature limit is higher, and acid corrosion-resistant ability is stronger, fully meets the high temperature and acid corrosion condition of flue gas.
Flue gas temperature is within 500 DEG C.
Resistance heater 38 includes that high-temperature vacuum radiates casing 31, U-shaped stratie 32 and upper flange and positive and negative
Pole connecting line composition.31 material of vacuum radiation casing is 310S stainless steel, surface blacking or coarse processing, to enhance surface heat spoke
It penetrates, the space that radiation casing 31 and flange and heating element 32 form is vacuum area.U-shaped 21 inside center of stratie
There is heater strip, material can be the softening of the high temperature resistants such as Ni80 alloy, iron cadmium magnesium alloy and the alloy material of forceful electric power thermal resistance；Use oxidation
Magnesium material filling, magnesium oxide material have electrical insulating property and good thermal conductivity.Outermost layer selects 310S stainless steel, can maintain material
Expect stability, softening temperature is 800 DEG C.It is within 500 DEG C that resistance heater, which recommends heating temperature,.
Similarly dug a well in advance using Sonic drill, pollutant vacuum extraction well 34 be inserted, using pebble and
Gravel 30 plugs the gap.Pebble and gravel 30 have stronger fluid permeability.Extraction well is in Polluted area aperture or opens
Slot can make aperture, can by after heating contaminant gases or Liquid Penetrant into vacuum extraction well 34.It is mentioned here true
Sky refers to the vacuum state of the underground pollution soil region due to caused by the constantly suction underground of vacuum extraction pump 40.Improve pollution
The vacuum degree of soil is conducive to parsing and the desorption of pollutant, and simultaneous system heating process gas escape is into air.Vacuum is taken out
It mentions between well arrangement and flue gas well and resistance heating well, sometimes, since heated well nearby also can produce pollutant, very
Empty extraction well can be in the closer position of heated well.
The medium of fluid media (medium) injection is water, air and the catalysts after exchanging heat with heat exchanger 15, passes through high pressure injection
It penetrates pump 17 and squeezes into injector well 35.The structure of injector well 35 is similar with extraction well, and injector well 35 is typically located at close to heating wellblock
Domain.The infiltration for being conducive to soil when injection water under thermal drivers is more advantageous to and forms access with extraction well；Injection air makes favorably
Oxidation reaction occurs under high temperature environment in pollutant, injection can accelerate the decomposition and desorption effect of pollutant when reflecting catalyst
Rate changes contaminant species structure.Injector well in the process of running, can not be in operating status always.
Temperature and pressure test well 33, by using temperature sensor and pressure sensor, monitoring and control contaminated soil
The temperature and pressure vacuum degree of layer 20, temperature and pressure signal are acquired by data and converting means is sent to monitor supervision platform and carries out
Analysis, and then adjust the vacuum degree in flue gas, resistance heating temperature and contaminated soil.Contaminated soil internal temperature and pressure
Measurement also can not testing well, be inserted directly into contaminated soil.Before carry out project, the survey of soil pollutant content need to be carried out
Contaminant measurement well can be used to determine its position, pollutant concentration and the scale of construction in examination.It can detect in Soil Thermal repair process
The concentration of the pollutant from fluid of vacuum extraction pump 40 out.
Flue gas well, resistance heating well, injector well, vacuum extraction well and testing well described above all use cement seal
Opening.It prevents from its body from leaking from pipe well to drain to atmospheric environment and cause secondary pollution.
The contaminant gases or gas-liquid mixture come out from vacuum extraction pump 40, are transmitted to dirt by pollutant pipe network 09
Contaminate object processing system.Contaminant gases are carried out by thermal oxidizer 41 to the further oxygenolysis of pollutant.Gaseous pollutant warp
It crosses in spraying condenser 42, further cooling to reduce pollutant temperature, fluid after cooling enters in gas-liquid separator 43, will
The separated from contaminants of liquid comes out.Then it is passed through activated carbon adsorption device 44 again.From spraying condenser 42, gas-liquid separator 43
With in activated carbon adsorption device 44 come out fluid contaminants, initially enter filter 48, subsequently into hydrotreater 49 into
Row processing, treated, and liquid need to meet emission request.From smoke exhaust pipe 08 come out flue gas and from activated carbon adsorption device 44
Gaseous pollutant out converges in bag filter 45, reduces the dust in gas, it is de- that mixed gas is passed through flue gas desulfurization
Nitre device 46 reduces sulfide and itrated compound concentration in gas, finally passes through the gas of 47 emission compliance of chimney.Separately
Outside, a kind of above situation for listing pollutant process mode can be used for containing the not flammable pollutant of hydrocarbon-containifirst
Heat exchanger and condenser directly condense, and then carry out subsequent processing, save high-temperature thermal oxidation step.
As shown in Fig. 2, indicating is plane between a kind of resistance heating well 38, flue gas well 39 and vacuum extraction well 34
Arrangement.Extraction well is arranged among heated well.The distance between heated well is 3~8m, and the distance the close more is conducive to fast
Speed repairs contaminated site.
The technology of the present invention can be applied to the contaminated soil remediation of hydrocarbon compound and its derivative, be adapted to volatility, half
Volatility and difficult volatile pollutant, while the heavy metal contaminants of some low boiling points can also be applied.
Claims (4)
1. a kind of contaminated soil in-situ heat repair system using distributed energy, which is characterized in that sent out including gas internal-combustion engine
Electricity and flue gas supply system, contaminated soil resistance heating and flue gas combination repair system, polluted gas extracting is collected and cigarette
Gas processing system；Gas internal-combustion engine power generation and flue gas supply system include gas internal-combustion engine (10), generator (11), transformer
(12), lube oil cooler (13), cylinder sleeve water cooler (14), heat exchanger (15), injectable media container (16), high pressure syringe pump
(17), power supply line (04), telegram in reply route (05), injectable media pipeline (06), temperature and pressure testing data transmission (07), row
Smoke pipe road (08), extraction stain property management net (09)；Contaminated soil resistance heating and flue gas combination repair system include high temperature
It radiates casing (31), U-shaped stratie (32), temperature or pressure test well (33), pollutant vacuum extraction well (34), note
It penetrates well (35), flue gas emission casing (36), flue gas injection cannula (37), resistance heater (38), flue gas heater (39)；Pollution
Gas extracting is collected and smoke processing system includes vacuum extraction pump (40), high-temperature thermal oxidation device (41), spraying condenser
(42), gas-liquid separator (43), activated carbon adsorption device (44), cloth bag dust blower (45), flue gas desulfurization and denitrification device (46), row
It puts chimney (47), filter (48), hydrotreater (49)；
Natural gas (01) and air (02), which enter in the cylinder of gas internal-combustion engine, to burn, and driving gas internal-combustion engine (10) piston is done
Function, piston drive the generator (11) being connected with crankshaft-and-connecting-rod, generate electricity, and institute's electricity is adjustable by transformer (12)
Supply the power of resistance heater (32), control resistance heating temperature, electric power after transformation by power supply line (04),
Telegram in reply route (05) is connected respectively at the positive and negative anodes of connector lug resistance heater (32) wiring, the acting of gas internal-combustion engine (10) piston
Final vacuum passes through heat exchanger (15) and cooler into flue gas soil heater (37) injection port by smoke discharging pipe (03)
(13), cylinder sleeve water cooler (14) exchanges heat, and for changing hot medium there are in injectable media container (16), passes through high pressure injection
Pump (17) are penetrated to be sent into injector well (35)；
The contaminated soil layer (20) for needing to repair, water-bearing layer (21) use vacuum extraction before carrying out Soil Thermal reparation in advance
Pumping takes the Free water in contaminated soil, reduces water level line, for pollutant chemical bonding water and soil particle hygroscopic moisture,
Carry out the boiling point for being heated above water using heater, realize the evaporation of water, carry out hot rehabilitating soil area top need using
Coating (22) is sealed,
Heated well is beaten in advance using Sonic drill, is then inserted resistance heater (38), flue gas heater (39), heated well
Diameter be greater than heater diameter, after heater is put into heated well, use pebble and gravel (30), uniformly arrange
Around heater, the gap of heated well is filled；
It is similarly dug a well in advance using Sonic drill, pollutant vacuum extraction well (34) is inserted, pebble and gravel are used
Stone (30) plugs the gap,
The medium of fluid media (medium) injection is water, air and the catalysts after exchanging heat with heat exchanger (15), passes through high-pressure injection
Pump (17) squeezes into injector well (35),
Temperature and pressure test well (33), by using temperature sensor and pressure sensor, monitoring and control contaminated soil layer
(20) temperature and pressure vacuum degree, temperature and pressure signal are acquired by data and converting means is sent to monitor supervision platform and carries out
Analysis, and then adjust the vacuum degree in flue gas, resistance heating temperature and contaminated soil；
The pollutant come out from vacuum extraction pump (40), is transmitted to high-temperature thermal oxidation device by extraction stain property management net (09)
(41), for pollutant by high-temperature thermal oxidation device (41) to the further oxygenolysis of pollutant, gaseous pollutant is cold by fountain
Further cooling in condenser (42) to reduce pollutant temperature, fluid after cooling enters in gas-liquid separator (43), by liquid
Separated from contaminants comes out, and is then passed through activated carbon adsorption device (44) again, from spraying condenser (42), gas-liquid separator (43)
Fluid contaminants with coming out in activated carbon adsorption device (44), initially enter filter (48), subsequently into hydrotreater
(49) it is handled in, the flue gas come out from smoke-exhaust pipeline (08) and the gaseous contamination come out from activated carbon adsorption device (44)
Object converges in bag filter (45), reduces the dust in gas, and mixed gas is passed through flue gas desulfurization and denitrification device (46), drops
Sulfide and itrated compound concentration in low gas finally pass through the gas of chimney (47) emission compliance.
2. a kind of contaminated soil in-situ heat repair system using distributed energy according to claim 1, feature exist
It include flue gas emission casing (36), flue gas injection cannula (37) in, the flue gas heater (39), flue gas is from flue gas injection cannula
(37) injection in, bottom opening, flue gas are excluded along flue gas injection-tube outside wall surface and smoke discharge pipe inner wall, and wherein
Heat convection is carried out by heat transfer entrained by high-temperature flue gas to heat exchange wall surface and then passes to soil.
3. a kind of contaminated soil in-situ heat repair system using distributed energy according to claim 1, feature exist
In, the resistance heater (38) include high-temperature vacuum radiation casing (31), U-shaped stratie (32) and upper flange and
The space that positive and negative anodes connecting line, vacuum radiation casing (31) and flange and heating element (32) form is vacuum area, U-shaped resistance
Heating element (32) inside center has heater strip, and material is Ni80 alloy, the softening of iron cadmium magnesium alloy high temperature resistant and forceful electric power thermal resistance
Alloy material；It is filled using magnesium oxide material.
4. a kind of contaminated soil in-situ heat restorative procedure using distributed energy, which is characterized in that sent out including gas internal-combustion engine
Electricity and flue gas supply system, contaminated soil resistance heating and flue gas combination repair system, polluted gas extracting is collected and cigarette
Gas processing system；Gas internal-combustion engine power generation and flue gas supply system include gas internal-combustion engine (10), generator (11), transformer
(12), lube oil cooler (13), cylinder sleeve water cooler (14), heat exchanger (15), injectable media container (16), high pressure syringe pump
(17), power supply line (04), telegram in reply route (05), injectable media pipeline (06), temperature and pressure testing data transmission (07), row
Smoke pipe road (08), extraction stain property management net (09)；Contaminated soil resistance heating and flue gas combination repair system include high temperature
It radiates casing (31), U-shaped stratie (32), temperature or pressure test well (33), pollutant vacuum extraction well (34), note
It penetrates well (35), flue gas emission casing (36), flue gas injection cannula (37), resistance heater (38), flue gas heater (39)；Pollution
Gas extracting is collected and smoke processing system includes vacuum extraction pump (40), high-temperature thermal oxidation device (41), spraying condenser
(42), gas-liquid separator (43), activated carbon adsorption device (44), cloth bag dust blower (45), flue gas desulfurization and denitrification device (46), row
It puts chimney (47), filter (48), hydrotreater (49)；
Natural gas (01) and air (02), which enter in the cylinder of gas internal-combustion engine, to burn, and driving gas internal-combustion engine (10) piston is done
Function, piston drive the generator (11) being connected with crankshaft-and-connecting-rod, generate electricity, and institute's electricity is adjustable by transformer (12)
Supply the power of resistance heater (32), control resistance heating temperature, electric power after transformation by power supply line (04),
Telegram in reply route (05) is connected respectively at the positive and negative anodes of connector lug resistance heater (32) wiring, the acting of gas internal-combustion engine (10) piston
Final vacuum passes through heat exchanger (15) and cooler into flue gas soil heater (37) injection port by smoke discharging pipe (03)
(13), cylinder sleeve water cooler (14) exchanges heat, and for changing hot medium there are in injectable media container (16), passes through high pressure injection
Pump (17) are penetrated to be sent into injector well (35)；
The contaminated soil layer (20) for needing to repair, water-bearing layer (21) use vacuum extraction before carrying out Soil Thermal reparation in advance
Pumping takes the Free water in contaminated soil, reduces water level line, for pollutant chemical bonding water and soil particle hygroscopic moisture,
Carry out the boiling point for being heated above water using heater, realize the evaporation of water, carry out hot rehabilitating soil area top need using
Coating (22) is sealed,
Heated well is beaten in advance using Sonic drill, is then inserted resistance heater (38), flue gas heater (39), heated well
Diameter be greater than heater diameter, after heater is put into heated well, use pebble and gravel (30), uniformly arrange
Around heater, the gap of heated well is filled；
It is similarly dug a well in advance using Sonic drill, pollutant vacuum extraction well (34) is inserted, pebble and gravel are used
Stone (30) plugs the gap,
The medium of fluid media (medium) injection is water, air and the catalysts after exchanging heat with heat exchanger (15), passes through high-pressure injection
Pump (17) squeezes into injector well (35),
Temperature and pressure test well (33), by using temperature sensor and pressure sensor, monitoring and control contaminated soil layer
(20) temperature and pressure vacuum degree, temperature and pressure signal are acquired by data and converting means is sent to monitor supervision platform and carries out
Analysis, and then adjust the vacuum degree in flue gas, resistance heating temperature and contaminated soil；
The pollutant come out from vacuum extraction pump (40), is transmitted to high-temperature thermal oxidation device by extraction stain property management net (09)
(41), for pollutant by high-temperature thermal oxidation device (41) to the further oxygenolysis of pollutant, gaseous pollutant is cold by fountain
Further cooling in condenser (42) to reduce pollutant temperature, fluid after cooling enters in gas-liquid separator (43), by liquid
Separated from contaminants comes out, and is then passed through activated carbon adsorption device (44) again, from spraying condenser (42), gas-liquid separator (43)
Fluid contaminants with coming out in activated carbon adsorption device (44), initially enter filter (48), subsequently into hydrotreater
(49) it is handled in, the flue gas come out from smoke-exhaust pipeline (08) and the gaseous contamination come out from activated carbon adsorption device (44)
Object converges in bag filter (45), reduces the dust in gas, and mixed gas is passed through flue gas desulfurization and denitrification device (46), drops
Sulfide and itrated compound concentration in low gas finally pass through the gas of chimney (47) emission compliance.
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| CN110508604A (en) * | 2019-08-02 | 2019-11-29 | 中科鼎实环境工程有限公司 | Energy-efficient combustion gas thermal desorption equipment |
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| CN113182343B (en) * | 2021-01-11 | 2022-05-13 | 中国科学院生态环境研究中心 | Device and method for repairing organic contaminated soil by using resistance heating coupling oxidant |
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| CN113102479A (en) * | 2021-04-22 | 2021-07-13 | 中国科学院生态环境研究中心 | Contaminated soil resistance heating operation self-optimization system and method based on voltage variable frequency regulation |
| CN114643272A (en) * | 2022-01-24 | 2022-06-21 | 中国科学院生态环境研究中心 | Multi-channel resistance heating device for repairing organic contaminated soil in pilot plant test |
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