CN208976494U - The thermal desorption electric system of resistance heating original position - Google Patents
The thermal desorption electric system of resistance heating original position Download PDFInfo
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- CN208976494U CN208976494U CN201821131747.0U CN201821131747U CN208976494U CN 208976494 U CN208976494 U CN 208976494U CN 201821131747 U CN201821131747 U CN 201821131747U CN 208976494 U CN208976494 U CN 208976494U
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Abstract
It includes: rectified three-phase circuit, single-phase inverter, high-frequency step-up transformer, single phase rectifier circuit and three-phase inverter that the utility model embodiment, which provides a kind of resistance heating original position thermal desorption electric system,；The input terminal of rectified three-phase circuit is connect with AC power source, the output end of rectified three-phase circuit and the input terminal of single-phase inverter connect, the output end of single-phase inverter and the input terminal of high-frequency step-up transformer connect, the output end of high-frequency step-up transformer and the input terminal of single phase rectifier circuit connect, the output end of single phase rectifier circuit and the input terminal of three-phase inverter connect, the output end of three-phase inverter is connect with heating electrode wells, heats electrode wells along the soil that depth of soil direction is embedded in target area.Frequency is improved by single-phase inverter, the volume weight of transformer is significantly reduced, and then reduce the volume of entire supply unit, improves the power density of resistance heating original position thermal desorption electric system.
Description
Technical field
The utility model embodiment is related to contaminated soil based technique for in-situ remediation field, more particularly, to resistance heating original
Position thermal desorption electric system.
Background technique
Currently, thermal desorption technology in situ is mainly used in the reparation of contaminated soil, principle is to improve contaminated area by heating
The temperature in domain, by soil or underground water pollution medium and its contained pollutant be heated to boiling point or more, with change pollution
The physico-chemical property of medium and pollutant selectively promotes pollutant gasification to wave by control electric system temperature and heating time
Hair increases the concentration of pollutant in gas phase or liquid phase, improves liquid phase extraction or gas phase extracting to the removal rate of pollutant.Relatively
In other showering technologies, thermal desorption technology in situ is at low cost, time-consuming is short, can handle simultaneously multiple pollutant, to low
Osmosis pollution area and heterogeneity contaminated area have stronger applicability, is applicable in that soil environment type is more, electric system moves, repairs
The advantages that soil after multiple is recycling.Therefore, thermal desorption technology in situ at home and abroad obtained in recent years it is quick development with
It is widely applied, has been successfully applied to repair the contaminated soils such as chlorinated solvent, petroleum hydrocarbon, benzene series species, inorganic mercury.
According to the difference that heat transfer mode and energy convert, In Situ Heating technology can be divided into 3 kinds, i.e. steam/heat air
(Steam Air Injection, the SAI) technology of injection, heat transfer heating (Thermal Conductive Heating, TCH)
Technology, resistance heating (Electrical Resistance Heating, ERH) technology.Resistance heating method is logical in the prior art
It is often that will heat the Polluted area that electrode is embedded in soil, be powered to heating electrode wells makes current flow through zone of saturation or non-full
Underground is heated with layer medium, pollutant is promoted to volatilize, dissolve, decompose or be degraded by microorganisms, and passes through extracting
System carries out qualified discharge after extracting the waste that pollutant or degradation generate out, to remove pollutant.
ERH electric system is converted to the adjustable three-phase of voltage and current by the original electric energy that power conversion inputs power network
Alternating current is delivered to heating electrode, to realize the control of subsurface temperature.As the core cell of ERH, ERH electric system needs to meet
Demand below:
In terms of use cost, ERH technology is continued for some time after needing underground to reach target temperature, is generally depended on
The factors such as primary pollutant concentration, target pollutant concentration, porosity, level of ground water, percolation flow velocity and increment.It is general to continue
Heating time is 2-12 months, and energy consumption is very big.Therefore electric system should also have higher energy conversion efficiency and power density.
In addition to this, as field engineering equipment, electric system should also have the characteristics of lightweight, high power density, motor-driven to improve
Property performance.
In terms of heating effect, since there are skin effects for resistance, so that current ERH technology makes soil carrying out heating to soil
The longitudinal temperature of earth is unevenly distributed, and resistance heating efficiency is caused to decline, and aggravates energy loss.For this purpose, electric system also needs energy
Enough guarantee that the longitudinal direction of underground current is uniformly distributed.
Traditional ERH electric system using multi-tap transformer or duplex frequency boostering transformer cooperation chopping depressuring by the way of into
Row voltage is adjusted.But multi-tap transformer can only realize discrete pressure regulation, and the secondary side tap of replacement need to be powered off first every time, it cannot
Realize electrification pressure regulation；Although duplex frequency boostering transformer can be realized electrification pressure regulation, but Industrial Frequency Transformer bulky.Moreover, two
Person, which does not have, guarantees underground current longitudinally equally distributed ability.
Utility model content
In order to overcome the problems referred above or it at least is partially solved the above problem, the utility model embodiment provides a kind of electricity
Thermal desorption electric system in situ is heated in resistance.
On the one hand, the utility model embodiment provides a kind of resistance heating original position thermal desorption electric system, comprising: energy supply
Unit, the supply unit include rectified three-phase circuit, single-phase inverter, high-frequency step-up transformer, single phase rectifier circuit and three
Phase inverter；
The input terminal of the rectified three-phase circuit is connect with AC power source, the output end of the rectified three-phase circuit with it is described
The input terminal of single-phase inverter connects, and the input terminal of the output end of the single-phase inverter and the high-frequency step-up transformer connects
It connects, the output end of the high-frequency step-up transformer is connect with the input terminal of the single phase rectifier circuit, the single phase rectifier circuit
Output end connect with the input terminal of the three-phase inverter, the output end of the three-phase inverter is connect with heating electrode wells,
The heating electrode wells are along the soil that depth of soil direction is embedded in target area；
The rectified three-phase circuit is used to the three-phase alternating current that the AC power source provides being converted to first kind direct current,
The single-phase inverter is used to improve the frequency of the first kind direct current and the first kind direct current is converted to blow-up
Galvanic electricity, the high-frequency step-up transformer are used to improve the voltage of the single-phase alternating current, and the single phase rectifier circuit is used for institute
The single-phase alternating current for stating high-frequency step-up transformer output is converted to the second class direct current, and the three-phase inverter is used for institute
It states the second class direct current and is converted to target three-phase alternating current, the changeable frequency of the target three-phase alternating current, the target three-phase
Alternating current is used to power for the heating electrode wells.
Preferably, resistance heating original position thermal desorption electric system further include: water-cooling loop；
The water-cooling loop includes the first water pipe and the second water pipe, the first end of first water pipe and second water pipe
First end be connected, the second end of first water pipe is connected with the second end of second water pipe, the of second water pipe
Two ends are provided with radiator and circulating pump；
First water pipe is arranged close to the supply unit, and second water pipe is arranged far from the supply unit；Institute
It states the water flow in the first water pipe and is used to absorb the heat that the supply unit generates, the water for absorbing the heat flows through the heat dissipation
Temperature is reduced after device heat dissipation, and back flows back into first water pipe through second water pipe after the circulating pump.
Preferably, the water-cooling loop further include: third water pipe, the third water pipe include the first pipeline section and the second pipe
Section, first pipeline section are connected to second pipeline section, and first pipeline section is arranged in the soil of the target area, described
First water pipe and second water pipe are connected to second pipeline section；
The first end of first water pipe is provided with water inlet pipe, is provided with water injection valve on the water inlet pipe；Second pipe
Introduction valve is provided in section；
Water in first water pipe flows through the introduction valve into second pipeline section, promotes the soil of the target area
The temperature of earth.
Preferably, the single-phase inverter is specially the single-phase inverter modulated based on pulse width, the three-phase inversion
Device is the three-phase inverter based on sinusoidal pulse width modulation or space vector pulse width modulation.
Preferably, resistance heating original position thermal desorption electric system further include: extraction tube；
One end of the extraction tube is arranged in the soil of the target area, and the other end and the purification of the extraction tube are set
Standby connection；
The extraction tube is for exporting the gasification pollutant in the soil of the target area to the cleaning equipment.
Preferably, resistance heating original position thermal desorption electric system further include: thermocouple arrays are wrapped in the thermocouple arrays
Multiple thermocouple units are included, all thermocouple units are respectively provided with point-blank, and thermocouple unit described in every two
The distance between it is identical；
The thermocouple arrays are embedded in the soil of the target area, and the straight line and the heating electrode wells are flat
Row；
The thermocouple arrays are used to measure the temperature value in the soil of the target area at different depth.
Preferably, resistance heating original position thermal desorption electric system further include: step voltage detection device；
The step voltage detection device is arranged in the soil surface of the target area, and with the heating electrode wells
Horizontal distance is pre-determined distance, for measuring the step voltage at the pre-determined distance.
Preferably, resistance heating original position thermal desorption electric system further include: intensity of sunshine sensor, the inspection of supply unit electric current
Survey device, supply unit voltage check device and central processing unit；
The intensity of sunshine sensor is arranged in the soil surface, for measuring the solar illumination of the soil surface；
The supply unit current detection means is connect with the output end of the three-phase inverter, for measuring the supply unit output
Current value；The supply unit voltage check device is connect with the output end of the three-phase inverter, for measuring the confession
The voltage value of energy unit output；
The central processing unit respectively with the intensity of sunshine sensor, the supply unit current detection means, described
Supply unit voltage check device, the single-phase inverter are connected with the three-phase inverter, and the central processing unit is used for root
According to the solar illumination, the current value and the voltage value, adjust the single-phase inverter parameter and the three-phase inversion
The parameter of device, until the performance number of supply unit output is identical as the power demand values in the soil of the target area.
Preferably, the central processing unit is also connect with the step voltage detection device, and the central processing unit is used for
The step voltage obtained according to the step voltage detection device measurement by the resistance heating original position thermal desorption electric system with
The AC power source disconnects.
Preferably, resistance heating original position thermal desorption electric system further include: isolation drive device；
The isolation drive device is used to for the central processing unit and the supply unit being isolated.
On the other hand, a kind of control of resistance heating original position thermal desorption electric system is additionally provided in the utility model embodiment
Method processed, comprising:
Obtain the solar illumination of soil surface, supply unit output in the resistance heating original position thermal desorption electric system
Current value and the voltage value of supply unit output；
According to the solar illumination, the current value and the voltage value, resistance heating original position thermal desorption electricity is adjusted
The parameter of the parameter of single-phase inverter and three-phase inverter in Force system, until the performance number and target of supply unit output
Power demand values in the soil in region are identical.
Resistance heating original position thermal desorption electric system provided by the embodiment of the utility model and its control method, system packet
It includes: rectified three-phase circuit, single-phase inverter, high-frequency step-up transformer, single phase rectifier circuit and three-phase inverter；Three phase rectifier electricity
The input terminal on road is connect with AC power source, and the output end of rectified three-phase circuit and the input terminal of single-phase inverter connect, single-phase inverse
The input terminal of the output end and high-frequency step-up transformer that become device connects, the output end and single phase rectifier circuit of high-frequency step-up transformer
Input terminal connection, the input terminal of the output end of single phase rectifier circuit and three-phase inverter connects, the output end of three-phase inverter
It is connect with heating electrode wells, heats electrode wells along the soil that depth of soil direction is embedded in target area.The utility model is real
Applying the resistance heating original position thermal desorption electric system provided in example is actually a kind of system topological, due to traditional ERH electric power
The main step-up transformer of system is located at the input side of 380V power frequency three-phase electricity, but Industrial Frequency Transformer bulky, leads to ERH electric power
System is top-heavy, equipment is too fat to move, increases construction site and places difficulty, reduces mobility.Therefore the utility model is implemented
Single-phase inverter, high-frequency step-up transformer, single phase rectifier circuit and three-phase inverter are provided in example in network topology, is passed through
Single-phase inverter improves the frequency of first kind direct current, significantly reduces the volume weight of high-frequency step-up transformer, and then subtract
The small volume of entire supply unit, improves the power density of resistance heating original position thermal desorption electric system.So this is practical
System topological in new embodiment has the characteristics of lightweight, high power density.Simultaneously as there are three-phase inversions in system
Device, the changeable frequency for the target three-phase alternating current that supply unit can be made to export, and then can be by target three-phase alternating current
Heating electrode wells power supply may be implemented heating electrode wells and be evenly heated to soil.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is
Some embodiments of the utility model, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural representation for resistance heating original position thermal desorption electric system that an embodiment of the present invention provides
Figure；
Fig. 2 is that a kind of structure for resistance heating original position thermal desorption electric system that another embodiment of the utility model provides is shown
It is intended to；
Fig. 3 is that a kind of structure for resistance heating original position thermal desorption electric system that another embodiment of the utility model provides is shown
It is intended to；
Fig. 4 is a kind of controlling party for resistance heating original position thermal desorption electric system that another embodiment of the utility model provides
The flow diagram of method.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
In the description of the utility model embodiment, it should be noted that term " center ", "upper", "lower", " left side ",
The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "inner", "outside" is orientation based on the figure or position
Relationship, be merely for convenience of description the utility model embodiment and simplify description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as implementing the utility model
The limitation of example.In addition, term " first ", " second ", " third " are used for description purposes only, it is not understood to indicate or imply phase
To importance.
In the description of the utility model embodiment, it should be noted that unless otherwise clearly defined and limited, term
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State concrete meaning of the term in the utility model embodiment.
When carrying out voltage adjusting using multi-tap transformer due to traditional ERH electric system, discrete pressure regulation can only be realized,
And the secondary side tap of replacement need to be powered off first every time, can not achieve electrification pressure regulation；Using duplex frequency boostering transformer cooperation chopping depressuring
Although electrification pressure regulation, but Industrial Frequency Transformer bulky be can be realized when mode carries out voltage adjusting, and the two does not have
Control the ability of underground current genesis analysis.So demand of the utility model based on ERH electric control system, for existing skill
The drawbacks of art scheme, propose a kind of improved resistance heating original position thermal desorption electric control system, overall volume is small and energy
Enough realize underground current longitudinally equally distributed ability.
As shown in Figure 1, an embodiment of the present invention provides a kind of resistance heating original position thermal desorption electric system, packet
Include: supply unit 1, supply unit 1 includes rectified three-phase circuit 11, single-phase inverter 12, high-frequency step-up transformer 13, single-phase whole
Current circuit 14 and three-phase inverter 15.The input terminal of rectified three-phase circuit 11 is connect with AC power source 2, rectified three-phase circuit 11
Output end is connect with the input terminal of single-phase inverter 12, the input of the output end and high-frequency step-up transformer 13 of single-phase inverter 12
End connection, the output end of high-frequency step-up transformer 13 are connect with the input terminal of single phase rectifier circuit 14, single phase rectifier circuit 14
Output end is connect with the input terminal of three-phase inverter 15, and the output end of three-phase inverter 15 is connect with heating electrode wells 3, heating electricity
Pole well 3 is along the soil that depth of soil direction is embedded in target area.
Rectified three-phase circuit 11 is used to the three-phase alternating current that AC power source 2 provides being converted to first kind direct current, single-phase
Inverter 12 is used to improve the frequency of first kind direct current and first kind direct current is converted to single-phase alternating current, and high frequency boosting becomes
Depressor 13 is used to improve the voltage of single-phase alternating current, and single phase rectifier circuit 14 is single-phase for exporting high-frequency step-up transformer 13
Alternating current is converted to the second class direct current, and three-phase inverter 15 is used to the second class direct current being converted to target three-phase alternating current,
The changeable frequency of target three-phase alternating current, target three-phase alternating current are used to power for the heating electrode wells.
Specifically, the AC power source used in the utility model embodiment is usually commercial power power supply, specifically can be defeated
The three-phase alternating current that voltage is 380V out, frequency is 50Hz.Three-phase alternating current be frequency is identical, voltage amplitude is equal by three,
Phase difference differs the electric current of the alternating current circuit output of hexagonal angle.Three-phase alternating current is input to through the input terminal of rectified three-phase circuit 11
In rectified three-phase circuit 11, direct current is converted to after the rectification of rectified three-phase circuit 11, here in order to electric with single-phase rectifier below
The direct current that road 14 exports distinguishes, and it is straight that the direct current being converted to after the rectification of rectified three-phase circuit 11 is denoted as the first kind
Galvanic electricity.Rectified three-phase circuit is the circuit for threephase AC electric energy being converted to direct current.Three-phase is whole in the utility model embodiment
Current circuit 11 is made of transformer, rectification main circuit and filter.
First kind DC supply input is improved the frequency of first kind direct current by single-phase inverter 12 into single-phase inverter 12
And first kind direct current is converted into single-phase alternating current, what needs to be explained here is that, the blow-up exported by single-phase inverter 12
Galvanic electricity is high frequency single-phase alternating current.The single-phase inverter 12 selected in the embodiment of the present invention can be by the frequency of first kind direct current
It improves to 20kHz.It is to reduce entire supply unit that the purpose of the frequency of first kind direct current is improved in the embodiment of the present invention
Volume, this is because usually directly three-phase alternating current is inputted in traditional resistance heating original position thermal desorption electric system
Output voltage is adjusted into adjustable transformer, while guaranteeing high-power output for heating electrode wells power supply.Due to three-phase alternating current
The frequency of electricity is lower, is 50Hz, and adjustable transformer realizes voltage regulation function and Gao Gong when the frequency of three-phase alternating current is lower
Rate output function then needs adjustable transformer to have very big volume, for example, output power is 100kW, then needs pressure regulation transformation
The volume of device reaches the size of half of container, not only increases occupied area, is not easy to move, and also add cost.
So the frequency that single-phase inverter 12 improves first kind direct current is added in the embodiment of the present invention in supply unit, due to making
High-frequency step-up transformer very little can reduce the volume of entire supply unit in turn.
Single-phase inverter 12 is the inverter of Parameter adjustable, can also carry out single-phase inverter 12 by adjustment parameter and export
The adjusting of voltage, to realize a wide range of linear voltage regulation.Parameter in single-phase inverter 12 includes duty ratio, can be accounted for by changing
The size of empty ratio adjusts the voltage for the single-phase alternating current that single-phase inverter 12 exports.When single-phase inverter 12 adjusts voltage, due to
The value range of duty ratio is 0-1, then the effect of single-phase inverter 12 is actually and realizes to adjust voltage on the basis of decompression,
That is the high frequency voltage of the single-phase alternating current of the output of single-phase inverter 12 is variable and is less than the voltage of first kind direct current.
The single-phase alternating current being converted to through single-phase inverter 12 is input to high-frequency step-up transformer 13, high frequency boosting transformation
The voltage of the raising single-phase alternating current of device 13.What needs to be explained here is that since single-phase inverter 12 has the function of decompression, decompression
Ratio it is related with the duty ratio of single-phase inverter 12.So the blow-up for needing to obtain after 13 pairs of high-frequency step-up transformer decompressions
Galvanic electricity is boosted, so that the voltage of the target three-phase alternating current finally exported from supply unit is adjustable within the scope of 0-200V.
Using the high-frequency step-up transformer 13 that step-up ratio is fixed, preferably, the value of step-up ratio in the utility model embodiment
It may range from 1:2 to 1:5, be not specifically limited in this embodiment in the utility model embodiment.Due to finally being exported from supply unit
Target three-phase alternating current voltage it is adjustable within the scope of 0-200V, then finally from supply unit export target three-phase alternating current
Electric current be also adjustable, thus can by adjust target three-phase alternating current voltage and current, make the output work of supply unit
Rate is definite value, even if so causing the fluctuation of load electrically as the increase of heating time will appear variation in underground
In the case of constant power output also may be implemented.
The single-phase alternating current that high-frequency step-up transformer 13 exports is input in single phase rectifier circuit 14, by single phase rectifier circuit
The single-phase alternating current that high-frequency step-up transformer 13 exports is converted to the second class direct current by 14.Second class DC supply input is to three-phase
In inverter 15, second class direct current is converted into target three-phase alternating current after three-phase inverter 15, three-phase inverter 15
Effect is the target three-phase alternating current that the second fixed class direct current of frequency is converted to changeable frequency.Target three-phase alternating current
Frequency variation pattern is frequency sweep, i.e., takes each frequency values in 0.5-100Hz repeatedly.
Target three-phase alternating current is used to provide electric energy for heating electrode wells 3, and heating electrode wells 3 are embedded along depth of soil direction
In the soil of target area, heating electrode wells 3 are used to be heated for the soil of target area, make the pollutant gas in soil
Change discharge, has the function that remove pollutant cleaning soil, goal region refers to the region for needing to remove pollutant.
Since electric current is there are skin effect, can make to heat temperature of the electrode wells in certain soil at a certain constant depth compared with
Height, and the temperature in other depths is lower, causes to heat electrode wells to soil heating unevenly.Due to constant depth and apply
The frequency of target three-phase alternating current in heating electrode wells is related, so passing through three-phase inverter in the utility model embodiment
Second class direct current is converted to the target three-phase alternating current of changeable frequency.It is that heating electrode wells supply by target three-phase alternating current
Electricity may be implemented heating electrode wells and be evenly heated to soil.
A kind of resistance heating original position thermal desorption electric system provided in the utility model embodiment, comprising: three phase rectifier
Circuit, single-phase inverter, high-frequency step-up transformer, single phase rectifier circuit and three-phase inverter；The input terminal of rectified three-phase circuit
It is connect with AC power source, the output end of rectified three-phase circuit and the input terminal of single-phase inverter connect, the output of single-phase inverter
End is connect with the input terminal of high-frequency step-up transformer, and the output end of high-frequency step-up transformer and the input terminal of single phase rectifier circuit connect
It connects, the output end of single phase rectifier circuit and the input terminal of three-phase inverter connect, the output end and heating electrode of three-phase inverter
Well connection heats electrode wells along the soil that depth of soil direction is embedded in target area.It is provided in the utility model embodiment
The thermal desorption electric system of resistance heating original position be actually a kind of system topological, due to the main liter of traditional ERH electric system
Pressure transformer is located at the input side of 380V power frequency three-phase electricity, but Industrial Frequency Transformer bulky, leads to the nose heave foot of ERH electric system
Gently, equipment is too fat to move, increases construction site and places difficulty, reduces mobility.Therefore in network in the utility model embodiment
It is provided with single-phase inverter, high-frequency step-up transformer, single phase rectifier circuit and three-phase inverter in topology, passes through single-phase inverter
Frequency is improved, the volume weight of transformer is significantly reduced, and then reduce the volume of entire supply unit, improves resistance
Heat the power density of thermal desorption electric system in situ.So the system topological in the utility model embodiment have lightweight,
The characteristics of high power density.Simultaneously as there are three-phase inverter in system, the target three that supply unit can be made to export intersects
The changeable frequency of galvanic electricity, and then can be that heating electrode wells pair may be implemented in heating electrode wells power supply by target three-phase alternating current
Soil is evenly heated.
System provided by the embodiment of the utility model uses the straight rectification circuit of double cross (i.e. rectified three-phase circuit and single-phase rectifier
Circuit)+three-phase inversion topological circuit (i.e. single-phase inverter and three-phase inverter), which has front and back stages inverter, preceding
Grade inverter is responsible for realizing that raising frequency and a wide range of linear voltage regulation, rear class inverter are responsible for realizing frequency conversion output, two-stage inverter point
Work is clear, and Each performs its own functions, while the volume weight of system can be greatly reduced using the use of HF switch (i.e. single-phase inverter)
Amount, improves the power density of system.
On the basis of the above embodiments, resistance heating original position thermal desorption electric system further include: water-cooling loop；
The water-cooling loop includes the first water pipe and the second water pipe, the first end of first water pipe and second water pipe
First end be connected, the second end of first water pipe is connected with the second end of second water pipe, the of second water pipe
Two ends are provided with radiator and circulating pump；
First water pipe is arranged close to the supply unit, and second water pipe is arranged far from the supply unit；Institute
It states the water flow in the first water pipe and is used to absorb the heat that the supply unit generates, the water for absorbing the heat flows through the heat dissipation
Temperature is reduced after device heat dissipation, and back flows back into first water pipe through second water pipe after the circulating pump.
Specifically, due to electric system output power, longevity of service.Due to unavoidable loss, supply unit 1
Amount of heat can be generated during operation.So the utility model embodiment realizes that system cools down by water-cooling.
As shown in Fig. 2, from figure 2 it can be seen that the thermal desorption electric system of resistance heating original position further include: water-cooling loop 4；
Water-cooling loop 4 includes the first water pipe 41 and the second water pipe 42, the first end phase of the first end of the first water pipe 41 and the second water pipe 42
Even, the second end of the first water pipe 41 is connected with the second end of the second water pipe 42, and the second end of the second water pipe 42 is provided with radiator
45 and circulating pump 44.
First water pipe 41 is arranged close to supply unit 1, and the second water pipe 42 is arranged far from supply unit 1.Water flow has just injected
Lower for temperature when one water pipe 41, flowing through the first water pipe 41 can be absorbed the heat of the generation of supply unit 1, absorb the water flow of heat
Temperature is reduced after the heat dissipation of radiator 45, and back flows back into the first water pipe 41 through the second water pipe 42 after circulating pump 44.So set
The temperature that can reduce supply unit is set, and being arranged to water-cooling loop can be such that the water flow for injecting the first water pipe 41 is recycled
It utilizes, has saved the energy, while also reducing cost.
As shown in Fig. 2, the three-phase alternating current that AC power source generates has A, B and C three-phase, pass through supply unit 1 respectively
In rectified three-phase circuit 11, single-phase inverter 12, high-frequency step-up transformer 13, single phase rectifier circuit 14 and three-phase inverter 15
After be converted to target three-phase alternating current, there are three power stage, respectively power stage U, power stage V and confessions for target three-phase alternating current tool
Electric grade W respectively corresponds the phase in target three-phase alternating current three-phase.Power stage U, power stage V and power stage W are heated with one respectively
Electrode wells connection, wherein the heating electrode wells 61 being connect with power stage U, the heating electrode wells 62 being connect with power stage V and with
The heating electrode wells 63 of power stage W connection are arranged in the soil of target area.
On the basis of the above embodiments, the water-cooling loop further include: third water pipe, the third water pipe include first
Pipeline section and the second pipeline section, first pipeline section are connected to second pipeline section, and first pipeline section is arranged in the target area
Soil in, first water pipe and second water pipe are connected to second pipeline section；
The first end of first water pipe is provided with water inlet pipe, is provided with water injection valve on the water inlet pipe；Second pipe
Introduction valve is provided in section；
Water in first water pipe flows through the introduction valve into second pipeline section, promotes the soil of the target area
The temperature of earth.
Specifically, since resistivity of media is the most important factor for influencing ERH system treatment effect, if ERH system
It is mounted in level of ground water or more or low-permeability soil, needs water being injected into heating electrode by injector well during heating
In soil near well, to prevent the soil for adjoining heating electrode wells to be oven-dried.As external injected media, lower injection water
Temperature can reduce the heating speed of ERH, interfere heating progress.Therefore, it is proposed in the utility model embodiment more than a kind of water-cooling
Heat recovery system.
As shown in Fig. 2, water-cooling loop 4 further includes third water pipe 51, third water pipe 51 includes the first pipeline section and the second pipeline section,
First pipeline section and the connection of the second pipeline section, the first pipeline section are arranged in the soil of target area, and the first pipeline section is specifically to be arranged in mesh
It marks in the injector well 8 in the soil in region, the first water pipe 41 and the second water pipe 42 are connected to the second pipeline section；On the second pipeline section
It is provided with introduction valve 52.The second pipeline section includes first part and second part in the utility model embodiment, first part and the
Point-blank, second part is vertical with first part for two pipelines, and first part is connected to second part.First water pipe 41
First end be provided with water inlet pipe, be provided with water injection valve 43 on water inlet pipe, water injection valve 43 is used in the first water pipe and the second water pipe
Water is injected to the first water pipe and the second water pipe when interior water is less, to guarantee that the water in the first water pipe and the second water pipe is sufficient.
It should be noted that water injection valve 43 and introduction valve 52 are not constantly to open, only just open when needed, that is to say, that
Water injection valve 43, the only water in the soil of target area are just opened when only water is less in the first water pipe and the second water pipe
It just needs to open introduction valve 52 when dividing less, to prevent soil to be oven-dried.
Since the effect of water flow in the first water pipe 41 is to absorb the heat of the generation of supply unit 1 to reduce supply unit 1
Temperature, and then improve the temperature of itself, so the water flow temperature of the second end in the first water pipe is higher, at this time can by when the
Water in one water pipe flows through introduction valve 52 and enters the second pipeline section, enters the first pipeline section along the second pipeline section, promotes the soil of target area
The temperature of earth, while the soil of target area can be prevented to be oven-dried.
Waste heat recovery scheme described in the utility model, the recirculated water water conservancy diversion after will heat up by the introduction valve 52 bypassed all the way
To injector well 8, water supplement is realized by water injection valve 43 therebetween.The effective heat dissipation that can be achieved at the same time electric control system is infused with heat
Penetrate function.Improve utilization rate of electrical.
On the basis of the above embodiments, as shown in Fig. 2, the thermal desorption electric system of resistance heating original position further include: extracting
Pipe；One end of extraction tube is arranged in the extraction well 9 in the soil of target area, and the other end and cleaning equipment 10 of extraction tube connect
It connects；Extraction tube is for exporting the gasification pollutant in the soil of target area to cleaning equipment 10.By cleaning equipment to gas
Change pollutant to be converted or eliminated, prevents gasification pollutant to be directly entered atmosphere and cause secondary pollution.
On the basis of the above embodiments, the single-phase inverter used in the utility model embodiment is specially to be based on pulse
The single-phase inverter of width modulated (Pulse Width Modulation, PWM), three-phase inverter are based on sinusoidal pulse width modulation
The three-phase inverter of (Sinusoidal PWM, SPWM) or space vector pulse width modulation (Space Vector PWM, SVPWM).
Single-phase inverter based on PWM can be realized a wide range of linear voltage regulation；Inversion transformation technique based on SPWM, can be realized
The output of frequency conversion sineization.Particularly, the inversion transformation technique based on SVPWM also can be used in rear class inverter, can not only realize frequency conversion
Sineization output, also can be improved the power factor of system, increase energy conversion efficiency, reduce heat abstractor.
On the basis of the above embodiments, as shown in Fig. 2, the thermal desorption electric system of resistance heating original position further include: thermoelectricity
Even array 7 includes multiple thermocouple units in thermocouple arrays 7, and all thermocouple units are respectively provided with point-blank, and every
The distance between two thermocouple units are identical；
Thermocouple arrays 7 are embedded in the soil of target area, straight where all thermocouple units in thermocouple arrays 7
Line is parallel with heating electrode wells, i.e., parallel with the heating electrode wells in Fig. 2 in heated well 61,62 and 63.The utility model is implemented
In example, using the temperature value at different depth in the soil of 7 measurement target region of thermocouple arrays, to match with three-phase inverter 15
It closes, guarantee keeps the temperature value in soil at different depth all the same after 15 change frequency of three-phase inverter, realizes heating electrode
Well is evenly heated soil.
On the basis of the above embodiments, resistance heating original position thermal desorption electric system further include: step voltage detection dress
It sets；
Step voltage detection device is arranged in the corresponding soil surface in target area, and the horizontal distance with heating electrode wells
For pre-determined distance, for measuring the step voltage at pre-determined distance.
Specifically, as shown in Fig. 2, since the construction area of ERH system is big, flow of personnel is intensive, due to step voltage
In the presence of will cause security risk, the embodiment of the present invention is also added into step voltage detection device 16 in systems；Step voltage inspection
It surveys device 16 to be arranged in the corresponding soil surface in target area, and is pre-determined distance with the horizontal distance of heating electrode wells, be used for
Measure the step voltage at pre-determined distance.Step voltage protection circuit is also added into simultaneity factor, step voltage protects circuit
In be provided with default step voltage, when illustrating that people is in system when the obtained step voltage of measurement is lower than default step voltage
Be it is safe, be when illustrating that people is in system when the obtained step voltage of measurement is higher than default step voltage it is dangerous, this
When system by emergency shutdown, improve construction safety coefficient.Default step voltage, which can according to need, to be set, this is practical new
It can be set as 30V or 36V in type embodiment.
On the basis of the above embodiments, resistance heating original position thermal desorption electric system, further includes: intensity of sunshine sensing
Device, supply unit current detection means, supply unit voltage check device and central processing unit；
The intensity of sunshine sensor is arranged in the soil surface, for measuring the solar illumination of the soil surface；
The supply unit current detection means is connect with the output end of the three-phase inverter, for measuring the supply unit output
Current value；The supply unit voltage check device is connect with the output end of the three-phase inverter, for measuring the confession
The voltage value of energy unit output；
The central processing unit respectively with the intensity of sunshine sensor, the supply unit current detection means, described
Supply unit voltage check device, the single-phase inverter are connected with the three-phase inverter, and the central processing unit is used for root
According to the solar illumination, the current value and the voltage value, adjust the single-phase inverter parameter and the three-phase inversion
The parameter of device, until the performance number of supply unit output is identical as the power demand values in the soil of the target area.
Specifically, traditional ERH electric system underground is electrical as the increase of heating time will appear variation, makes
At the fluctuation of load.Therefore traditional ERH electric system needs manual calibration at regular intervals.In the utility model embodiment
Supply unit current detection means, supply unit voltage check device and central processing unit are introduced in the power system.In
Central processor dynamically adjusts the parameter of single-phase inverter and the parameter of three-phase inverter according to voltage value and current value, makes to energize
The performance number of unit output is identical as the power demand values in the soil of target area.Wherein, the parameter of single-phase inverter is single
The duty ratio of phase inverter, the parameter of three-phase inverter are the output frequency parameter of three-phase inverter.
Voltage, current double closed-loop electric system are used in the utility model embodiment, it can be in the case where the fluctuation of load
It realizes constant power output, in the process due to introducing central processing unit, does not need manually to participate in, increase the flexible of system
Property, while drain on manpower and material resources is reduced, and the degree of regulation of entire electric system can be increased.
Since the environment temperature of different regions, intensity of sunshine are different, soil is set to reach energy supply needed for same target temperature single
The output power of member is different, so introducing intensity of sunshine sensor in the utility model embodiment, passes through intensity of sunshine sensor
The temperature of soil surface is measured, central processing unit can carry out dynamic tune to output power according to the temperature of soil surface
It is whole, improve utilization rate of electrical.
As shown in figure 3, the thermal desorption electric system of resistance heating original position further include: intensity of sunshine sensor 17, supply unit
Current detection means 19, supply unit voltage check device 18 and central processing unit 20.Intensity of sunshine sensor 17 is arranged in mesh
The soil surface for marking region, for measuring the solar illumination of soil surface；Supply unit current detection means 19 and three-phase inversion
The output end of device connects, for measuring the current value of supply unit output；Supply unit voltage check device 18 and three-phase inversion
The output end of device connects, for measuring the voltage value of supply unit output.
Central processing unit 120 is electric with intensity of sunshine sensor 17, supply unit current detection means 19, supply unit respectively
Pressure detection device 18, single-phase inverter are connected with three-phase inverter, and central processing unit 20 is used for according to intensity of sunshine sensor 17
Measure obtained solar illumination, supply unit current detection means 19 measures obtained current value and supply unit voltage detecting dress
The voltage value that 18 measurements obtain is set, the parameter of single-phase inverter and the parameter of three-phase inverter are adjusted, until supply unit exports
The soil identical and with target area of performance number in power demand values it is identical.
It should be noted that realizing this reality using central processing unit well known in the prior art in the utility model embodiment
With the processing and control function in new embodiment.It can be realized the center handled in the utility model embodiment with control function
There are many processors, only with the digital signal processor and controller of model TMS320F28335 in the utility model embodiment
For (Digital Signal Processing, DSP), but and does not have to this and used in the utility model embodiment to limit
The concrete model of central processing unit.
In addition, the central processing unit 20 in the utility model embodiment is also connect with thermocouple arrays 7, thermocouple battle array is obtained
Temperature value in the soil that column measurement obtains at different depth adjusts three-phase inversion according to the temperature value at different depth in soil
The parameter of device keeps the temperature value in the soil of target area at different depth identical.Soil is indulged in the utility model embodiment
To profiling temperatures as control variable introduce electric system, can be realized the Precise control to the underground soil moisture.
Moreover, by comparing the longitudinal temperature difference of underground, in conjunction with three contraries in system provided by the embodiment of the utility model
Become the distinctive frequency conversion output function of device, the longitudinal temperature value that can be realized underground is identical, realizes heating electrode wells to difference
The soil of depth is evenly heated.
On the basis of the above embodiments, central processing unit 20 is also protected with step voltage detection device 16 and step voltage
Circuit connection, central processing unit 20 obtain step voltage detection device 16 and measure obtained step voltage, by measurement obtain across
The default step voltage being arranged in step voltage and step voltage protection circuit is compared, and central processing unit 20 is according to step voltage
Detection device 16 measures obtained step voltage and determines whether to break the thermal desorption electric system of resistance heating original position with AC power source
It opens.It is safe, center at this time when illustrating that people be in system when the obtained step voltage of measurement is lower than default step voltage
Processor does not operate.It is dangerous when illustrating that people is in system when the step voltage that measurement obtains is higher than default step voltage
, system emergency is shut down in the connection of central processing unit control at this time step voltage protection circuitry cuts system and AC power source,
Improve construction safety coefficient.
On the basis of the above embodiments, central processing unit 20 is also communicated to connect with WiFi antenna 21, passes through WiFi antenna
The 21 data real-time deliveries for obtaining central processing unit 20 store host computer 22 to data, simultaneously will to host computer 22
Real time data and historical data are patterned display.In addition, central processing unit 20 is also communicated to connect with GPS antenna, to upper
Position machine 22 carries out clock authorization, allows each real time data and historical data to correspond to a moment, and then judge exception
At the time of data correspond to.
The utility model is monitored system using wireless host computer, carries out clock time service using GPS, host computer has
The graphic software platform function of real time data and historical data increases the safety coefficient and convenience of system；In addition to this, temperature rise
Information and power information are of great significance for subsequent engineering optimization as important initial data.
On the basis of the above embodiments, due to the operating voltage very little of central processing unit 20, usually several volts, and energize
The operating voltage of unit is usually 380V or so, and the two differs greatly, in order to realize central processing unit 20 to single-phase inverter and
The adjustment effect of three-phase inverter is additionally provided in the utility model embodiment between central processing unit 20 and single-phase inverter
Isolation drive device is again provided with isolation drive device, isolation drive dress between central processing unit 20 and three-phase inverter
It sets for by central processing unit and supply unit isolation, i.e., being separated low-pressure area and higher-pressure region, preventing from influencing each other, realizes independent
Work.
As shown in figure 4, additionally providing a kind of resistance heating on the basis of the above embodiments, in the utility model embodiment
The control method of thermal desorption electric system in situ, comprising:
S1, obtains that the solar illumination of soil surface, supply unit is defeated in the resistance heating original position thermal desorption electric system
The voltage value of current value and supply unit output out；
S2 adjusts resistance heating original position thermal desorption according to the solar illumination, the current value and the voltage value
The parameter of the parameter of single-phase inverter and three-phase inverter in electric system, until the performance number and mesh of supply unit output
The power demand values marked in the soil in region are identical.
On the basis of the above embodiments, the control method of resistance heating original position thermal desorption electric system further include:
Obtain the target area that thermocouple arrays measurement obtains in the resistance heating original position thermal desorption electric system
Soil in temperature value at different depth；
According to the temperature value at different depth in the soil of the target area, the parameter of the three-phase inverter is adjusted,
So that the temperature value in the soil of the target area at different depth is identical.
Specifically, the executing subject of control method is central processing unit, entire control method in the utility model embodiment
Operating process and above system class embodiment in central processing unit function and process flow be it is one-to-one, this is practical new
Details are not described herein in type embodiment.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case where, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that:
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement；And these are modified or replaceed, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution
The spirit and scope of scheme.
Claims (10)
1. a kind of resistance heating original position thermal desorption electric system characterized by comprising supply unit, the supply unit packet
Include rectified three-phase circuit, single-phase inverter, high-frequency step-up transformer, single phase rectifier circuit and three-phase inverter；
The input terminal of the rectified three-phase circuit is connect with AC power source, the output end of the rectified three-phase circuit with it is described single-phase
The input terminal of inverter connects, and the output end of the single-phase inverter is connect with the input terminal of the high-frequency step-up transformer, institute
The output end for stating high-frequency step-up transformer is connect with the input terminal of the single phase rectifier circuit, the output of the single phase rectifier circuit
End is connect with the input terminal of the three-phase inverter, and the output end of the three-phase inverter is connect with heating electrode wells, described to add
Thermode well is along the soil that depth of soil direction is embedded in target area；
The rectified three-phase circuit is used to the three-phase alternating current that the AC power source provides being converted to first kind direct current, described
Single-phase inverter is used to improve the frequency of the first kind direct current and the first kind direct current is converted to single-phase alternating current,
The high-frequency step-up transformer is used to improve the voltage of the single-phase alternating current, and the single phase rectifier circuit is used for the high frequency
The single-phase alternating current of step-up transformer output is converted to the second class direct current, and the three-phase inverter is used for described second
Class direct current is converted to target three-phase alternating current, the changeable frequency of the target three-phase alternating current, the target three-phase alternating current
For powering for the heating electrode wells.
2. resistance heating original position thermal desorption electric system according to claim 1, which is characterized in that further include: water cooling is returned
Road；
The water-cooling loop includes the first water pipe and the second water pipe, and the of the first end of first water pipe and second water pipe
One end is connected, and the second end of first water pipe is connected with the second end of second water pipe, the second end of second water pipe
It is provided with radiator and circulating pump；
First water pipe is arranged close to the supply unit, and second water pipe is arranged far from the supply unit；Described
Water flow in one water pipe is used to absorb the heat that the supply unit generates, and the water for absorbing the heat flows through the radiator and dissipates
Temperature is reduced after heat, and back flows back into first water pipe through second water pipe after the circulating pump.
3. resistance heating original position thermal desorption electric system according to claim 2, which is characterized in that the water-cooling loop is also
It include: third water pipe, the third water pipe includes the first pipeline section and the second pipeline section, and first pipeline section and second pipeline section connect
Logical, first pipeline section is arranged in the soil of the target area, first water pipe and second water pipe with it is described
The connection of second pipeline section；
The first end of first water pipe is provided with water inlet pipe, is provided with water injection valve on the water inlet pipe；On second pipeline section
It is provided with introduction valve；
Water in first water pipe flows through the introduction valve into second pipeline section, promotes the soil of the target area
Temperature.
4. resistance heating original position thermal desorption electric system according to claim 1, which is characterized in that the single-phase inverter
Single-phase inverter specially based on pulse width modulation, the three-phase inverter are based on sinusoidal pulse width modulation or space vector
The three-phase inverter of pulsewidth modulation.
5. resistance heating original position thermal desorption electric system according to claim 1, which is characterized in that further include: extraction tube；
One end of the extraction tube is arranged in the soil of the target area, and the other end and cleaning equipment of the extraction tube connect
It connects；
The extraction tube is for exporting the gasification pollutant in the soil of the target area to the cleaning equipment.
6. resistance heating original position thermal desorption electric system according to claim 1, which is characterized in that further include: thermocouple
Array includes multiple thermocouple units in the thermocouple arrays, and all thermocouple units are respectively provided with point-blank,
And the distance between thermocouple unit described in every two is identical；
The thermocouple arrays are embedded in the soil of the target area, and the straight line is parallel with the heating electrode wells；
The thermocouple arrays are used to measure the temperature value in the soil of the target area at different depth.
7. resistance heating original position thermal desorption electric system according to claim 1 to 6, which is characterized in that also wrap
It includes: step voltage detection device；
The soil surface of the target area, and the level with the heating electrode wells is arranged in the step voltage detection device
Distance is pre-determined distance, for measuring the step voltage at the pre-determined distance.
8. resistance heating original position thermal desorption electric system according to claim 7, which is characterized in that further include: sunshine is strong
Spend sensor, supply unit current detection means, supply unit voltage check device and central processing unit；
The intensity of sunshine sensor is arranged in the soil surface, for measuring the solar illumination of the soil surface；It is described
Supply unit current detection means is connect with the output end of the three-phase inverter, for measuring the electricity of the supply unit output
Flow valuve；The supply unit voltage check device is connect with the output end of the three-phase inverter, single for measuring the energy supply
The voltage value of member output；
The central processing unit respectively with the intensity of sunshine sensor, the supply unit current detection means, the energy supply
Cell voltage detection device, the single-phase inverter are connected with the three-phase inverter, and the central processing unit is used for according to institute
State solar illumination, the current value and the voltage value, adjust the single-phase inverter parameter and the three-phase inverter
Parameter, until the performance number of supply unit output is identical as the power demand values in the soil of the target area.
9. resistance heating original position thermal desorption electric system according to claim 8, which is characterized in that the central processing unit
It is also connect with the step voltage detection device, the central processing unit according to the step voltage detection device for measuring
The step voltage arrived disconnects the resistance heating original position thermal desorption electric system and the AC power source.
10. resistance heating original position thermal desorption electric system according to claim 8, which is characterized in that further include: isolation is driven
Dynamic device；
The isolation drive device is used to for the central processing unit and the supply unit being isolated.
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| CN201821131747.0U CN208976494U (en) | 2018-07-17 | 2018-07-17 | The thermal desorption electric system of resistance heating original position |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108856271A (en) * | 2018-07-17 | 2018-11-23 | 北京工业大学 | The thermal desorption electric system of resistance heating original position and its control method |
| CN110681689A (en) * | 2019-11-05 | 2020-01-14 | 中科鼎实环境工程有限公司 | Resistance heating thermal desorption device for repairing polluted soil and underground water |
| EP4175408A1 (en) * | 2021-10-27 | 2023-05-03 | Chromalox, Inc. | Heating system and method of heating a process medium |
-
2018
- 2018-07-17 CN CN201821131747.0U patent/CN208976494U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108856271A (en) * | 2018-07-17 | 2018-11-23 | 北京工业大学 | The thermal desorption electric system of resistance heating original position and its control method |
| CN110681689A (en) * | 2019-11-05 | 2020-01-14 | 中科鼎实环境工程有限公司 | Resistance heating thermal desorption device for repairing polluted soil and underground water |
| CN110681689B (en) * | 2019-11-05 | 2024-04-16 | 中科鼎实环境工程有限公司 | Resistance heating thermal desorption device for repairing polluted soil and underground water |
| EP4175408A1 (en) * | 2021-10-27 | 2023-05-03 | Chromalox, Inc. | Heating system and method of heating a process medium |
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