CN107552555A - The system and method for electric heater unit and in-situ immobilization ultra-deep organic polluted soil - Google Patents
The system and method for electric heater unit and in-situ immobilization ultra-deep organic polluted soil Download PDFInfo
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- CN107552555A CN107552555A CN201710908622.8A CN201710908622A CN107552555A CN 107552555 A CN107552555 A CN 107552555A CN 201710908622 A CN201710908622 A CN 201710908622A CN 107552555 A CN107552555 A CN 107552555A
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Abstract
The invention discloses the system and method for a kind of electric heater unit and in-situ immobilization ultra-deep organic polluted soil, the electric heater unit, including conductive core and resistance wire, the resistance wire is the multistage resistance wire being independently arranged along conductive core prolonging direction, wherein, the both ends of every section of resistance wire are welded in conductive core.The system of the in-situ immobilization ultra-deep organic polluted soil of the present invention includes the electric heater unit, also include wireless temperature control system, the system of the in-situ immobilization ultra-deep organic polluted soil can realize ultra-deep heating and precise positioning heating, service life is longer, and signal transduction is no longer influenceed by line length, signal transduction distance is no longer limited, has unrivaled advantage.
Description
Technical field
The present invention relates to a kind of in-situ remediation system of organic polluted soil, and in particular to a kind of electric heater unit and original position
The system and method for repairing ultra-deep organic polluted soil, belong to environmental technology field.
Background technology
As China industrializes, the process of urbanization and modern agriculture, land pollution getting worse, and progressively show as
The combined pollution of multiple pollutant, especially the most prominent with heavy metal pollution and high toxicity, persistency organic contaminant, they mainly come
From a large amount of uses of useless factories and miness area, house refuse, three industrial wastes and agricultural chemicals, chemical fertilizer.These pollutants can not only change soil
Physicochemical characteristicses, cause the reduction of the degeneration of soil, crop yield and quality, and pass through runoff and leaching polluted surface
Water and underground water, deteriorate hydrological environment, and may by directly contacting, food chain etc. jeopardize the life and health of the mankind.Therefore,
It is extremely urgent to solve the problems, such as that soil pollution is repaired.
Hot reinforcement technique, i.e. soil in-situ heat, and refer to by direct or indirect heat exchange, by pollution medium and its contained
Organic pollution be heated to enough temperature, make organic pollution from pollution medium volatilize or separate process.Heat strengthens skill
Art includes microwave heating, radio frequency heating, resistance heating, hot-air injection, high-temperature steam injection etc., when can substantially reduce purification
Between, it also can remove the low volatile organic or semi-volatile organic matter that conventional SEV technologies can not be removed.Traditional electric heating tube
The U-shaped resistance wire being inside integrated, under conditions of long term high temperature heating, resistance wire easily deforms, with itself or outer protection
Steel pipe is in contact, so as to cause short circuit or grounding phenomenon, heating tube damage.Especially resistance wire is longer, and heating-up temperature is got over
Height, in the case that the heat time is longer, resistance wire deformation is more serious.Traditional temperature control system is wire signal conduction system
Unite, multi-thread towing on place, and signal transduction is influenceed by line length, general signal conduction distance is limited.Currently used nothing
It line signal transduction technology, can often be obstructed again by barriers such as buildings, cause signal to weaken or disappear.
The content of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of electric heater unit and in-situ immobilization ultra-deep
The system and method for organic polluted soil.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of electric heater unit, including conductive core and resistance wire, the resistance wire are independently to be set along conductive core prolonging direction
The multistage resistance wire put, wherein, the both ends of every section of resistance wire are welded in conductive core, and power supply is supplied by conductive wick feed resistance wire
Electricity, resistance wire are U-shaped or winding-type.
Preferably, multiple insulation stators are arranged with the conductive core, for fixing conductive core, prevent resistance wire from adding
Deforming contact in thermal process, causes short circuit, plays insulation and supporting role；
Insulating supporting button is arranged with the resistance wire, is connected between the insulating supporting button being oppositely arranged by insulation support rod
Connect.
Preferably, in addition to a water pipe precaution set, the water pipe precaution set by resistance wire and conductive core be enclosed in one it is closed
In cavity, the closed chamber is filled with inert gas, for slowing down the degree of oxidation of resistance wire, extends its life-span.
Preferably, covered and surround by a stainless steel protection at the top of the conductive core.
Preferably, described multistage resistance wire is parallel connection.
Preferably, the material of the conductive core is stainless steel, and the resistance wire is iron reeling or nickel reeling.
Present invention also offers a kind of system of in-situ immobilization ultra-deep organic polluted soil, including thermometric, temperature regulating device,
Table attemperator and waste gas extraction device, in addition to above-described electric heater unit.
Preferably, the thermometric, temperature regulating device include temperature-sensing system, signal translating system, wireless transmitting system, temperature
Spend control computer and intelligent power supply system；
The data obtained are converted into electric signal by the temperature-sensing system, and wireless communication is converted to through signal translating system
Number, sent through wireless transmitting system to temperature control and calculate machine, temperature control calculates machine and sends instruction through wireless transmitting system
To intelligent power supply system, and then control the heating-up temperature of electric heater unit.
Preferably, the waste gas extraction device includes extraction well and on the ground extracting tail gas condensing processing unit；
The extraction well sealed bottom, the well side wall to bottom at the 0.5m of underground are cracked, to draw waste water waste gas, taken out
The material for carrying well is carbon steel or stainless steel；
The electric heater unit is arranged with 3 or 6 for one group using equilateral triangle or regular hexagon mode, and each electricity adds
Mode is connect between thermal using star to connect, extraction well is located at the equilateral triangle or regular hexagon of electric heater unit arrangement form
Center；
The lower section of the extracting bottom is provided with thermocouple, for real time temperature measurement；
Gas-liquid separation device, the multistage wind-cooling heat dissipating that the ground extracting tail gas condensing processing unit includes being sequentially connected are cold
Solidifying heat sink, low temperature plasma and activated carbon combined tail gas processing unit and vavuum pump.
Invention further provides a kind of method of in-situ immobilization ultra-deep organic polluted soil, comprise the following steps：
(1) pollutant component at soil different depth to be repaired is detected, calculates the required electrical heating work(at different depth
Rate, multistage resistance wire is welded by actual demand；
(2) some electric heater units and extraction well are inserted into soil to be repaired, and it is heat-insulated in soil surface to be repaired laying
Layer, power-on；
(3) temperature measuring equipment is inserted into soil to be repaired, is wireless signal transmission to temperature control by the temperature inversion measured
Computer, temperature control calculate machine and send instruction to intelligent power supply system, adjust input current, and then change heating power, adjust
Whole heating-up temperature；
(4) extraction well extracts the gaseous contaminant after heating and polluted underground water to the tail gas condensing processing unit of ground
Discharge.
The operation principle of the present invention is, in the case of the hot matrix temperature field that electric heater unit is thermally formed, specific
At a temperature of, organic pollution acts on from the ADSORPTION STATE combined with soil through high temperature, chemical oxidation etc., and volatilization forms gaseous contamination
Thing, through waste gas extraction device, high-temp waste gas waste water is extracted from soil and handled and is discharged for gas up to standard and liquid, so as to net
Change soil.
Relative to prior art, the beneficial effects of the present invention are：
The resistance wire of the present invention uses multistage parallel combination mode, and the length of every section of resistance wire can be according to soil to be repaired
Actual conditions depending on, accordingly, with respect to longer resistance wire, deformation is more controllable, versatile, and multistage combine
Afterwards, it is possible to achieve ultra-deep heats (1-35m)；Depthkeeping heating (it can such as realize in an electric heater unit and be heated at 0-3m, 6-
Do not heat at 9m, heated at 9-12m)；Precise positioning heating (such as in an electric heater unit, can be welded according to voltage condition
The resistance wire of different length is connect, heating power is 10kw at 0-3m to realize, heating power is 5kw at 3-6m, is added at 6-9m
Thermal power is 20kw).Due between resistance wire and the water pipe precaution set of the present invention, filled with inert gas, therefore, electricity can be slowed down
The degree of oxidation of silk is hindered, effectively extends the service life of resistance wire, it is cost-effective.In addition, the temperature control equipment of the present invention is adopted
With being based on cellular protenchyma networked wireless communications technology so that the place monitoring temperature data of soil to be repaired can be transmitted
It is farther, energy consumption is lower, can effectively penetrate barrier, it is breached the limitation of place scale, go for all organic
Contaminated site, especially have in the large-scale and reparation of the contaminated site organic polluted soil of preserved building thing unrivaled excellent
Gesture.
Brief description of the drawings
Fig. 1 is the electric heater unit structural representation of the present invention；
Fig. 2 is the system structure diagram of the in-situ immobilization ultra-deep organic polluted soil of the present invention；
Fig. 3 be the present invention electric heater unit and extraction well distribution schematic diagram, wherein, Fig. 3 a be equilateral triangle distribution,
Fig. 3 b are distributed for regular hexagon.
Description of reference numerals：1- electric heater units；2- conductive cores；3- resistance wires；4- insulating supporting buttons；41- insulating bars；5-
Insulate stator；6- intelligent power supply systems；7- water pipe precaution sets；8- airtight cavities；9- stainless steel protection sets；10- thermometrics, temperature control
Device；11- waste gas extraction devices；12- extraction wells；13- extracts tail gas condensing processing unit on the ground；131- gas-liquid separation devices；
132- multistages wind-cooling heat dissipating condenses heat sink；133- low temperature plasma exhaust gas processing devices；134- activated carbon vent gas treatments
Device；135- vavuum pumps；14- thermal insulation layers.
Embodiment
In conjunction with embodiment, the present invention is described in more detail.It should be appreciated that the present embodiment is merely to illustrate this hair
It is bright, rather than limit protection scope of the present invention.
As shown in figure 1, the electric heater unit 1 for the present embodiment：Conductive core 2 and multistage including 35m length are stretched along conductive core 2
The independent resistance wire 3 that length direction is arranged in parallel, every section of 3 long 2-3m of resistance wire, resistance wire 3 are U-shaped or annular, wherein, institute
State conductive core 2 and be arranged fixation by multiple insulation stators 5 to distribute alternately, prevent conductive core 2 from rocking, while resistance can be prevented
The deforming contact in heating process of silk 3, causes short circuit, plays insulation and supporting role.The both ends of every section of resistance wire 3, which are welded in, leads
Battery core 2, intelligent power supply system 6 are powered by conductive core 2 to resistance wire 3.Insulating supporting button 4 is arranged with the resistance wire 3, relatively
Connected between the insulating supporting button 4 of setting by insulating bar 41, realize fixing function.Resistance wire 3 is enclosed in by water pipe precaution set 7
In one airtight cavity 8, filled with inert gas in the airtight cavity 8, for slowing down the degree of oxidation of resistance wire 3, extending it makes
Use the life-span.The top of conductive core 2 is surrounded by stainless steel protection set 9；Wherein, the material of conductive core 2 is stainless steel, the resistance wire
3 be iron reeling or nickel reeling.
It is illustrated in figure 2 the system of the in-situ immobilization ultra-deep organic polluted soil of the present embodiment：Including electricity as described above
Heater 1, thermometric, temperature regulating device 10 and waste gas extraction device 11；
Wherein thermometric, temperature regulating device 10 include temperature-sensing system, signal translating system, wireless transmitting system, temperature control
Computer and intelligent power supply system 6 processed, in the course of work, temperature-sensing system can be with the heating temperature of real-time detection position
Degree, and the data obtained are converted into electric signal, wireless signal is converted to through signal translating system, then through wireless transmitting system
Transmit the signal to temperature control and calculate machine, temperature control calculates machine according to the signal received and the difference of former design temperature
It is different, instruction is sent, and instruction is sent to intelligent power supply system 6 through wireless transmitting system, intelligent power supply system 6 changes heating electricity
Pressure, and then control the heating-up temperature of electric heater unit 1；
Waste gas extraction device 11 mainly includes extraction well 12 and on the ground extracting tail gas condensing processing unit 13, wherein, extracting
The sealed bottom of well 12, the well side wall to bottom at the 0.5m of underground is cracked, and to draw waste water waste gas, the material of extraction well 12 is
Carbon steel or stainless steel, electric heater unit 1, for one group, are arranged, such as Fig. 3 with 3 or 6 using equilateral triangle or regular hexagon mode
It is shown, mode is connect using star between each electric heater unit 1 and connected, extraction well 12 is located at positive the three of the arrangement form of electric heater unit 1
The center of angular (Fig. 3 a) or regular hexagon (Fig. 3 b).The lower section of the bottom of extraction well 12 is provided with thermocouple, for real time temperature measurement.Ground
Upper extracting tail gas condensing processing unit 13 includes gas-liquid separation device 131, the multistage wind-cooling heat dissipating condensation cooling dress being sequentially connected
Put 132, low temperature plasma exhaust gas processing device 133 and activated carbon exhaust gas processing device 134 and vavuum pump 135, the vacuum
The pumping of pump 135 makes to form negative pressure in extraction well 12, after resistance wire 3 is heated at high temperature, adsorbs organic pollution and soil on soil
Water in earth is absorbed into extraction well 12, separates gas-liquid two-phase through gas-liquid separation device 131, gas phase portion is through multistage air-cooled scattered
Heat condensation heat sink 132 is changed into cryogenic gas, then through low temperature plasma exhaust gas processing device 133 and activated carbon vent gas treatment
The processing of device 134 is changed into can discharge gas.
The method that in-situ immobilization ultra-deep organic polluted soil is carried out using said system, is comprised the following steps：
(1) pollutant kind of certain soil to be repaired and underground vertical distribution situation are：It is mainly polycyclic aromatic hydrocarbon at 0-8m
Pollution and Polychlorinated biphenyls, required temperature are 100-200 DEG C, and 8-16m is mainly chlorohydrocarbon organic contamination, and required temperature is 300-
500 DEG C, suitable resistance wire can be welded at 0-8m on same root electric heater unit, makes its heating power be 20kw, at 8-16m
Suitable resistance wire is welded, the heating power for making this section of resistance wire is 8kw；
(2) some electric heater units and extraction well are inserted into soil to be repaired, each electric heater unit uses Y-connection, is in
Regular hexagon is distributed, and lays thermal insulation layer 14, power-on in soil surface to be repaired；
(3) temperature measuring equipment is inserted into soil to be repaired, is wireless signal transmission to temperature control by the temperature inversion measured
Computer, when the temperature measured at 0-8m is higher than 200 DEG C or less than 100 DEG C, the temperature measured at 8-16m is higher than 500 DEG C
Or during less than 300 DEG C, temperature control calculates machine and sends instruction to intelligent power supply system, adjusts supply voltage, and then change different
Heating power at heating, adjust heating-up temperature；
(4) extraction well extracts the gaseous contaminant after heating and polluted underground water to the tail gas condensing processing unit of ground
Discharge.
Embodiments of the invention content is disclosed above, but the present embodiment is not limited to the scope that the present invention is implemented,
The simple equivalent changes and modifications made according to claims of the present invention and description, still falls within the technology of the present invention
In the range of scheme.
Claims (10)
1. a kind of electric heater unit, including conductive core and resistance wire, it is characterised in that：
The resistance wire is the multistage resistance wire being independently arranged along conductive core prolonging direction, wherein, the both ends of every section of resistance wire are equal
It is welded in conductive core, power supply is powered by conductive wick feed resistance wire, and resistance wire is U-shaped or winding-type.
2. electric heater unit as claimed in claim 1, it is characterised in that multiple insulation are arranged with the conductive core and are fixed
Piece, for fixing conductive core, resistance wire deforming contact in heating process is prevented, causes short circuit, play insulation and supporting role；
Insulating supporting button is arranged with the resistance wire, is connected between the insulating supporting button being oppositely arranged by insulation support rod.
3. electric heater unit as claimed in claim 1, it is characterised in that also including a water pipe precaution set, the water pipe precaution set
Resistance wire and conductive core are enclosed in an airtight cavity, the closed chamber is filled with inert gas, for slowing down resistance wire
Degree of oxidation, extend its life-span.
4. electric heater unit as claimed in claim 1, it is characterised in that covered and wrap by a stainless steel protection at the top of the conductive core
Enclose.
5. electric heater unit as claimed in claim 1, it is characterised in that described multistage resistance wire is parallel connection.
6. electric heater unit as claimed in claim 1, it is characterised in that the material of the conductive core is stainless steel, the electricity
It is iron reeling or nickel reeling to hinder silk.
7. a kind of system of in-situ immobilization ultra-deep organic polluted soil, including thermometric, temperature regulating device, earth's surface attemperator and waste gas
Extraction device, it is characterised in that the electric heater unit described in also including claim any one of 1-6.
8. the system of in-situ immobilization ultra-deep organic polluted soil as claimed in claim 7, it is characterised in that the thermometric, control
Warm device includes temperature-sensing system, signal translating system, wireless transmitting system, temperature control and calculates machine and intelligent power supply system
System；
The data obtained are converted into electric signal by the temperature-sensing system, and wireless signal is converted to through signal translating system,
Sent through wireless transmitting system to temperature control and calculate machine, temperature control calculates machine and sends instruction to intelligence through wireless transmitting system
Energy electric power system, and then control the heating-up temperature of electric heater unit.
9. the system of in-situ immobilization ultra-deep organic polluted soil as claimed in claim 7, it is characterised in that the waste gas extracting
Device includes extraction well and on the ground extracting tail gas condensing processing unit；
The extraction well sealed bottom, the well side wall to bottom at the 0.5m of underground is cracked, to draw waste water waste gas, extraction well
Material be carbon steel or stainless steel；
The electric heater unit is arranged with 3 or 6 for one group using equilateral triangle or regular hexagon mode, each electrical heating dress
Mode is connect between putting using star to connect, extraction well is located in the equilateral triangle or regular hexagon of electric heater unit arrangement form
The heart；
The lower section of the extracting bottom is provided with thermocouple, for real time temperature measurement；
The ground extracting tail gas condensing processing unit includes gas-liquid separation device, the multistage wind-cooling heat dissipating condensation drop being sequentially connected
Warm device, low temperature plasma and activated carbon combined tail gas processing unit and vavuum pump.
A kind of 10. method of in-situ immobilization ultra-deep organic polluted soil, it is characterised in that comprise the following steps：
(1) pollutant component at soil different depth to be repaired is detected, the required electrical heating power at different depth is calculated, presses
Multistage resistance wire is welded in actual demand；
(2) some electric heater units and extraction well are inserted into soil to be repaired, and thermal insulation layer is laid in soil surface to be repaired, opened
Open power supply；
(3) temperature measuring equipment is inserted into soil to be repaired, is that wireless signal transmission to temperature control calculates by the temperature inversion measured
Machine, temperature control calculating machine send instruction to intelligent power supply system, adjust input current, and then change heating power, adjustment add
Hot temperature；
(4) extraction well extracts the gaseous contaminant after heating and polluted underground water to ground tail gas condensing processing unit heel row
Put.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710908622.8A CN107552555B (en) | 2017-09-29 | 2017-09-29 | Electric heating device and system and method for in-situ remediation of ultra-deep organic contaminated soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710908622.8A CN107552555B (en) | 2017-09-29 | 2017-09-29 | Electric heating device and system and method for in-situ remediation of ultra-deep organic contaminated soil |
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| CN107552555A true CN107552555A (en) | 2018-01-09 |
| CN107552555B CN107552555B (en) | 2022-10-21 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108856270A (en) * | 2018-07-10 | 2018-11-23 | 北京高能时代环境技术股份有限公司 | A kind of hot repair apparatus for coating and hot restorative procedure for improvement volatility organic polluted soil in situ |
| CN109226227A (en) * | 2018-08-31 | 2019-01-18 | 中科鼎实环境工程股份有限公司 | Ultraviolet light heating gas phase suitable for polycyclic aromatic hydrocarbon pollution extracts prosthetic device |
| CN109647872A (en) * | 2019-01-29 | 2019-04-19 | 中国科学院南京土壤研究所 | Sandboxing techniques system and method is answered in a kind of soil in-situ hot repair |
| CN109702004A (en) * | 2019-02-02 | 2019-05-03 | 广西博世科环保科技股份有限公司 | A kind of soil in-situ thermal desorption reparation electric heater unit |
| 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 |
| CN110847152A (en) * | 2019-11-29 | 2020-02-28 | 大连海事大学 | Soil in-situ high-temperature sintering heat treatment system and method |
| CN112474766A (en) * | 2020-11-20 | 2021-03-12 | 苏州精英环保有限公司 | Manufacturing method of standardized in-situ heat removal additional heating element |
| CN114769304A (en) * | 2021-09-16 | 2022-07-22 | 苏州精英环保有限公司 | Adjustable lantern ring type heating system for in-situ thermal desorption |
| CN116060428A (en) * | 2023-02-20 | 2023-05-05 | 北京建工环境修复股份有限公司 | In-situ gas thermal desorption system for organic contaminated soil |
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Cited By (12)
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|---|---|---|---|---|
| CN108856270A (en) * | 2018-07-10 | 2018-11-23 | 北京高能时代环境技术股份有限公司 | A kind of hot repair apparatus for coating and hot restorative procedure for improvement volatility organic polluted soil in situ |
| CN108856270B (en) * | 2018-07-10 | 2024-04-26 | 北京高能时代环境技术股份有限公司 | Thermal repairing device and thermal repairing method for in-situ treatment of volatile organic contaminated soil |
| CN109226227A (en) * | 2018-08-31 | 2019-01-18 | 中科鼎实环境工程股份有限公司 | Ultraviolet light heating gas phase suitable for polycyclic aromatic hydrocarbon pollution extracts prosthetic device |
| CN109647872A (en) * | 2019-01-29 | 2019-04-19 | 中国科学院南京土壤研究所 | Sandboxing techniques system and method is answered in a kind of soil in-situ hot repair |
| CN109647872B (en) * | 2019-01-29 | 2020-04-17 | 中国科学院南京土壤研究所 | Soil in-situ thermal remediation sandbox simulation system and method |
| CN109702004A (en) * | 2019-02-02 | 2019-05-03 | 广西博世科环保科技股份有限公司 | A kind of soil in-situ thermal desorption reparation electric heater unit |
| 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 |
| CN110847152A (en) * | 2019-11-29 | 2020-02-28 | 大连海事大学 | Soil in-situ high-temperature sintering heat treatment system and method |
| CN112474766A (en) * | 2020-11-20 | 2021-03-12 | 苏州精英环保有限公司 | Manufacturing method of standardized in-situ heat removal additional heating element |
| CN114769304A (en) * | 2021-09-16 | 2022-07-22 | 苏州精英环保有限公司 | Adjustable lantern ring type heating system for in-situ thermal desorption |
| CN116060428A (en) * | 2023-02-20 | 2023-05-05 | 北京建工环境修复股份有限公司 | In-situ gas thermal desorption system for organic contaminated soil |
| CN116060428B (en) * | 2023-02-20 | 2024-03-12 | 北京建工环境修复股份有限公司 | In-situ gas thermal desorption system for organic contaminated soil |
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