CN102818816B - Soil thermal desorption rotary furnace testing system and testing method thereof - Google Patents
Soil thermal desorption rotary furnace testing system and testing method thereof Download PDFInfo
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Abstract
The invention provides a soil thermal desorption rotary furnace testing system and a testing method thereof. The testing system comprises a carrier gas device, a rotary thermal desorption testing device, and a tail gas treatment device, wherein the carrier gas device comprises a nitrogen bottle, a pressure reducing valve and an air inlet erosion-resistant air guide hose; the rotary thermal desorption testing device comprises a pipe type rotary furnace, an air inlet air pressure valve, a flow meter and an air outlet air pressure valve; and the tail gas treatment device comprises an air outlet erosion-resistant air guide hose, a condenser, a gas washing bottle and an active carbon adsorbing device. The testing system and the testing method can be used for effectively and rapidly testing a contaminated soil thermal desorption condition, and can obtain important technique design parameters such as a nitrogen ventilation pressure, a heating rate, a rotating speed of a furnace tube, retaining time and desorption efficiency before a soil thermal desorption technology is applied to actual engineering, so that the scientific guidance and the technical support are provided for the actual application of the soil thermal desorption repairing technology. Thus, the soil thermal desorption rotary furnace testing system provides the basis for the actual engineering.
Description
Technical field
The invention belongs to contaminated soil remediation technical field, be specifically related to a kind of Soil Thermal desorption test macro and method of testing.
Background technology
From last century Mo; along with the adjustment of the industrial structure and the expansion of city size; large quantities of steel plant of China, the contour contaminating enterprises in chemical plant stop production successively, move; therefore left over a large amount of contaminated site, the contaminated soil remediation of contaminated site becomes one of current China environmental protection hot technology field.
Now the most common to one of soil restoring technology be exactly Soil Thermal desorption recovery technique, Soil Thermal desorption recovery technique almost effectively can repair most volatility and half volatile organic polluted soil and some volatile metallic pollution soil, compared to other treatment technologies, there is the features such as clearance is high, quick.The principle of Soil Thermal desorption recovery technique is by direct or indirect heat interchange, contaminated soil and contained pollutant thereof are heated to enough temperature (being usually heated to 150 DEG C to 540 DEG C), with the process making pollutant be volatilized from contaminated soil or be separated.According to heating-up temperature, Low Temperature Thermal desorption technology (150 DEG C to 315 DEG C) and high-temperature hot desorption technology (315 DEG C to 540 DEG C) can be divided into.
Now more existing patents have related to soil pollution thermal desorption repair process method, system and equipment, but what these patents all related to is through engineering approaches thermal desorption system, be not suitable for laboratory technique test, as laboratory technique test have to be applied to, will have that testing efficiency is low, cost is high, heating-up temperature and a defect such as residence time control accuracy is poor.So generally speaking, the research and development of Soil Thermal desorption recovery technique are still in the starting stage, applied basic research about this technology is still very rare, especially lack reliably as laboratory testing system and the method for testing of thermal desorption technology application foundation, cause to provide scientific guidance for the application of this engineeringization.
Summary of the invention
The object of this invention is to provide a kind of soil thermal desorption rotary furnace test macro and method of testing, the application that solve existing Soil Thermal desorption recovery technique lacks the problem of reliable laboratory testing system and method for testing.
For achieving the above object, the present invention adopts following technical scheme: a kind of soil thermal desorption rotary furnace test macro, comprise carrier gas device, revolution thermal desorption proving installation and exhaust gas processing device, it is characterized in that: described carrier gas device comprises the corrosion-resistant soft air-guide pipe of nitrogen cylinder, reduction valve and air inlet, wherein the corrosion-resistant soft air-guide pipe of air inlet is connected on the gas outlet of nitrogen cylinder, and reduction valve is located on the corrosion-resistant soft air-guide pipe of air inlet.
Described revolution thermal desorption proving installation includes tubular type rotary furnace, air inlet air pressure valve, flowmeter and air pressure valve of giving vent to anger, the inlet end of described tubular type rotary furnace is connected with meter flanges, flowmeter is communicated with air inlet air pressure valve again, air inlet air pressure valve is communicated with the corrosion-resistant soft air-guide pipe of the air inlet in carrier gas device by standard rapid-acting coupling again, the outlet side of tubular type rotary furnace and air pressure valve Flange joint of giving vent to anger.
Described exhaust gas processing device includes give vent to anger corrosion-resistant soft air-guide pipe, condenser, Drexel bottle and active carbon adsorber, the air intake opening of described condenser is communicated with corrosion-resistant soft air-guide pipe of giving vent to anger, corrosion-resistant soft air-guide pipe of giving vent to anger is communicated with the air pressure valve of giving vent to anger in revolution thermal desorption proving installation by standard rapid-acting coupling again, the gas outlet of condenser is communicated with the air intake opening of Drexel bottle, and the gas outlet of Drexel bottle is communicated with air by active carbon adsorber again.
Described condenser is had at least two and is cascaded by emulsion tube.
Described Drexel bottle is had at least two and is cascaded by grass tube.
The Ventilation Rate of described nitrogen cylinder can be 2ml/min, and venting pressure scope is 0.1MPa ~ 0.15MPa, and the nitrogen gas concn in nitrogen cylinder is 99.9%.
The corrosion-resistant soft air-guide pipe of described air inlet and corrosion-resistant soft air-guide pipe of giving vent to anger are PU soft air-guide pipe.
Apply a method of testing for above-mentioned soil thermal desorption rotary furnace test macro, it is characterized in that step is as follows.
The soil sample of step one, collection contaminated soil, natural air drying, removes the foreign material such as rubble, and cross 20 mesh sieves, determine the principal character of soil sample, the principal character of soil sample comprises physicochemical property, pollutant kind, pollutant load.
Step 2, determine some groups of test conditions according to the principal character determined in step one, often organize test condition include Quartz stove tube intraductal atmospheric pressure, the need of condensate water, warming temperature, heating-up time, thermostat temperature, constant temperature time, chilling temperature, cool time, rotary furnace rotating speed.
Step 3, take quantitative soil sample, with material scraper, soil sample is put into the Quartz stove tube of tubular type rotary furnace, with stove hook, soil sample is shifted onto the constant temperature zone position of Quartz stove tube middle, then flange is installed, open carrier gas, regulate soil thermal desorption rotary furnace test macro, make soil thermal desorption rotary furnace test macro meet wherein one group of test condition in some groups of test conditions.
Step 4, beginning thermal desorption test experiments, in experimentation, Quartz stove tube rotates with setting speed, heating element is uniformly distributed in the bottom of the burner hearth in tubular type rotary furnace, to ensure the thermal desorption effect of the soil sample in stove, thermal desorption gaseous contaminant out enters condenser condenses via corrosion-resistant soft air-guide pipe of giving vent to anger, and condensed gas enters Drexel bottle and active carbon adsorber again, finally becomes clean gas with carrier gas discharged to air.
After step 5, heating terminate, continue logical carrier gas to cool to soil sample, then carrier gas is closed, unload the outlet side of pipe type rotary furnace and the Flange joint of air pressure valve of giving vent to anger, adjustment Quartz stove tube inclination angle, makes soil sample from landing in Quartz stove tube, by soil sample collection, detect its pollutant load, and determine pollutant thermal desorption efficiency.
Step 6, repetition step 3, to step 5, test the thermal desorption efficiency of soil sample under other group test conditions.
Before carrying out step 3, the leakproofness of tubular type rotary furnace can be tested.
In described step 3, quantitative soil sample can be 50 grams of soil samples.
In described step 3, the intraductal atmospheric pressure of Quartz stove tube can be 0.02 MPa.
In described step 3, the ratio of warming temperature and heating-up time, namely heating rate can be 5 ~ 7 DEG C/min.
Compared with prior art the present invention has following characteristics and beneficial effect: the present invention relates to a kind of small-sized, that be easy to movement, can the laboratory testing system of Fast Measurement Soil Thermal desorption conditions, and a kind of can fast, the method for testing of the test contaminated soil thermal desorption condition of system.
The present invention is applicable to volatility, the parameter testing of semi-volatile organic matter contaminated soil thermal desorption, contaminated soil thermal desorption condition can be tested out fast and effectively, can before Soil Thermal desorption technology be applied to Practical Project, obtain the critical process design parameters such as nitrogen venting pressure, the rate of heat addition, boiler tube rotating speed, heating-up temperature, the residence time and desorption efficiency, for the practical application of Soil Thermal desorption recovery technique provides scientific guidance and technical support, for Practical Project provides foundation, promote the development of Soil Thermal desorption recovery technique.
Test macro in the present invention is laboratory scale, and its structure is simple, install, debugging, change all convenient and swift, equipment in system can be convenient mobile according to actual experiment situation, and dirigibility is high, in addition, the connection of each unit is also very convenient, simple, convenient, easy to control, safe and efficient, stable, application is strong, low cost, low energy consumption, widely applicable.
In the present invention, method of testing determines test condition according to the principal character of contaminated soil, then pollutant thermal desorption efficiency in testing soil under this condition of this test.This method of testing simple and convenient (process of the test is simple and convenient), science, specification, testing cost is low, and the temperature-controlled precision of rotary furnace equipment is high, and testing efficiency is high, good test effect, and experiment result accuracy is high.
Invention applies " continuous nitrogen → revolution heating (Quartz stove tube) → tail gas liquid phase scrubbing " technique, take high pure nitrogen as carrier gas, preventing pollution thing at high temperature forms secondary pollution; Take Quartz stove tube as heating tube, compared with traditional metal tube (mostly being steel pipe), the advantage such as there are high temperature resistant (1100 DEG C), acid and alkali-resistance, thermal conductivity are good, Heat stability is good, electrical insulation capability are good; Tail gas liquid phase scrubbing avoids rough burning, causes secondary pollution problems, safety and environmental protection compared with conventional exhaust combustion technology.
By exhaust gas processing device absorption, (organic contaminant evaporated from soil carries out subsequent treatment through processes such as condensation, organic solvent absorption, the absorption of activated charcoal robust fibre to the volatile contaminant that the present invention in use produces, pollutant is trapped in exhaust gas processing device), can avoid causing secondary pollution.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
Fig. 1 is structural representation of the present invention.
Reference numeral: give vent to anger corrosion-resistant soft air-guide pipe, 9-of 1-nitrogen cylinder, 2-reduction valve, the corrosion-resistant soft air-guide pipe of 3-air inlet, the rapid-acting coupling of 4-standard, 5-flowmeter, 6-air inlet air pressure valve, 7-tubular type rotary furnace, 8-gives vent to anger air pressure valve, 10-condenser, 11-emulsion tube, 12-grass tube, 13-Drexel bottle, 14-active carbon adsorber.
Embodiment
Embodiment is shown in Figure 1, this soil thermal desorption rotary furnace test macro, comprises carrier gas device, revolution thermal desorption proving installation and exhaust gas processing device.
Described carrier gas device comprises the corrosion-resistant soft air-guide pipe 3 of nitrogen cylinder 1, reduction valve 2 and air inlet, and wherein the corrosion-resistant soft air-guide pipe 3 of air inlet is connected on the gas outlet of nitrogen cylinder 1, and reduction valve 2 is located on the corrosion-resistant soft air-guide pipe 3 of air inlet.
Described revolution thermal desorption proving installation includes tubular type rotary furnace 7, air inlet air pressure valve 6, flowmeter 5 and air pressure valve 9 of giving vent to anger, the inlet end of described tubular type rotary furnace 7 and flowmeter 5 Flange joint, flowmeter 5 is communicated with air inlet air pressure valve 6 again, air inlet air pressure valve 6 is communicated with by the corrosion-resistant soft air-guide pipe 3 of standard rapid-acting coupling and the air inlet in carrier gas device again, the outlet side of tubular type rotary furnace 7 and air pressure valve 9 Flange joint of giving vent to anger.
Described exhaust gas processing device includes give vent to anger corrosion-resistant soft air-guide pipe 8, condenser 10, Drexel bottle 13 and active carbon adsorber 14, the air intake opening of described condenser 10 is communicated with corrosion-resistant soft air-guide pipe 8 of giving vent to anger, corrosion-resistant soft air-guide pipe 8 of giving vent to anger is communicated with the air pressure valve 9 of giving vent to anger in revolution thermal desorption proving installation by standard rapid-acting coupling again, the gas outlet of condenser 10 is communicated with the air intake opening of Drexel bottle 13, and the gas outlet of Drexel bottle 13 is communicated with air by active carbon adsorber 14 again.
In the present embodiment, nitrogen cylinder 1 is standard nitrogen bottle, and the Ventilation Rate of nitrogen cylinder 1 is 2ml/min, and venting pressure scope is 0.1MPa ~ 0.15MPa, and the nitrogen gas concn in nitrogen cylinder 1 is 99.9%.Nitrogen cylinder 1 can completely cut off air, prevents subsidiary reaction from occurring.
The object arranging reduction valve 2, air inlet air pressure valve 6 and air pressure valve 9 of giving vent to anger controls nebulizer gas pressure, namely controls the air pressure in the Quartz stove tube in tubular type rotary furnace 7 and flow.Reduction valve 2 also can control nitrogen intake.
In the present embodiment, the corrosion-resistant soft air-guide pipe of air inlet 3 and corrosion-resistant soft air-guide pipe 8 of giving vent to anger are PU soft air-guide pipe, its corrosion-and high-temp-resistant.The internal diameter of the corrosion-resistant soft air-guide pipe of described air inlet 3 and corrosion-resistant soft air-guide pipe 8 of giving vent to anger mate with the inlet end of Quartz stove tube and outlet side respectively, and in the present embodiment, the corrosion-resistant soft air-guide pipe of air inlet 3 is 8mm with the internal diameter of corrosion-resistant soft air-guide pipe 8 of giving vent to anger.
Described condenser 10 is had at least two and is cascaded by emulsion tube 11.There is condenser pipe condenser inside, and the outside of condenser pipe has condensate water to cool, and condensate water can be recycled.
Described Drexel bottle 13 is had at least two and is cascaded by grass tube 12, and Drexel bottle is built with the organic solvent selected for different tail gas, and be easy to change, absorption efficiency is high, safety and environmental protection.
Described active carbon adsorber 14 is made up of fibre active carbon, for absorbing the untreated clean organic gas of Drexel bottle, guarantee that the tail gas that Soil Thermal desorption process produces reaches minimum value to environmental impact, guarantee being absorbed more than dusty gas as far as possible, tail gas is safety dumping after active carbon adsorber 14.
The heating temperature range of described tubular type rotary furnace 7 is wide, and thermograde control is little, and heat time control accuracy is high, and pedotheque can evenly, fully heat.Burner hearth in tubular type rotary furnace 7 is refractory fibrous material, and burner hearth bottom evenly lays heating element; Quartz stove tube in tubular type rotary furnace 7 is arranged in burner hearth, caliber 800mm, long 1000mm, wherein heading-length 300mm, constant temperature zone length 150mm, and Quartz stove tube is connected with carrier gas device and exhaust gas processing device by the joint flange at two ends.Quartz stove tube is rotatable, and rotating speed is adjustable, guarantees that boiler tube build-in test soil sample fully heats, and improves test effect.Quartz stove tube and burner hearth are respectively equipped with at least one temperature element, and this temperature element is K type thermopair, can monitor temperature in boiler tube at any time.
The method of testing of this application soil thermal desorption rotary furnace test macro, its step is as follows.
The soil sample of step one, collection contaminated soil, natural air drying, removes the foreign material such as rubble, and cross 20 mesh sieves, determine the principal character of soil sample, the principal character of soil sample comprises physicochemical property, pollutant kind, pollutant load;
Step 2, determine some groups of test conditions according to the principal character determined in step one, often organize test condition include Quartz stove tube intraductal atmospheric pressure, the need of condensate water (carry out Low Temperature Thermal desorption test time without the need to opening condensate water, carry out high-temperature hot desorption test time need open condensate water), warming temperature, the heating-up time, thermostat temperature, constant temperature time, chilling temperature, cool time, rotary furnace rotating speed.
Step 3, take quantitative soil sample (about 50 grams), with material scraper, soil sample is put into the Quartz stove tube of tubular type rotary furnace 7, with stove hook, soil sample is shifted onto the constant temperature zone position of Quartz stove tube middle, then flange is installed, open carrier gas, regulate soil thermal desorption rotary furnace test macro, make soil thermal desorption rotary furnace test macro meet wherein one group of test condition in some groups of test conditions.Before carrying out step 3, preferably first revolution thermal desorption proving installation and the corrosion-resistant soft air-guide pipe of air inlet 3, corrosion-resistant soft air-guide pipe 8 of giving vent to anger are connected, test the leakproofness of a pipe type rotary furnace 7.
Step 4, beginning thermal desorption test experiments, in experimentation, Quartz stove tube rotates with setting speed, heating element is uniformly distributed in the bottom of the burner hearth in tubular type rotary furnace 7, to ensure the thermal desorption effect of the soil sample in stove, thermal desorption gaseous contaminant out enters condenser 10 condensation via corrosion-resistant soft air-guide pipe 8 of giving vent to anger, and condensed gas enters Drexel bottle 13 and active carbon adsorber 14 again, finally becomes clean gas with carrier gas discharged to air.
After step 5, heating terminate, continue logical carrier gas to cool to soil sample, then carrier gas is closed, unload the outlet side of pipe type rotary furnace 7 and the Flange joint of air pressure valve 9 of giving vent to anger, adjustment Quartz stove tube inclination angle, makes soil sample from landing in Quartz stove tube, by soil sample collection, detect its pollutant load, and determine pollutant thermal desorption efficiency;
Step 6, repetition step 3, to step 5, test the thermal desorption efficiency of soil sample under other group test conditions.
In the present embodiment, in step 3, the intraductal atmospheric pressure of Quartz stove tube is set to 0.02 MPa, the ratio of warming temperature and heating-up time, and namely heating rate is set to 5 ~ 7 DEG C/min.
The present embodiment carries out thermal desorption test at certain industrial pollution place polycyclic aromatic hydrocarbon pollution, relative pressure 0.02MPa in the pipe keeping Quartz stove tube in thermal desorption test process, the rotating speed of Quartz stove tube is 10r/min, each test soil sample 50g, 300 DEG C are warming up under the ramp rate conditions of 6 DEG C/min, testing soil residence time at 300 DEG C is 20min, the residual concentration of PAHs in soil and pollutants removal rate (partial results is in table 1).At 300 DEG C during residence time 20min, the clearance of the various PAHs in coking contaminated soil can reach 92%-99%, and the clearance of total PAHs can reach 95%.
It is to be understood that foregoing invention content and embodiment are intended to the practical application proving technical scheme provided by the present invention, should not be construed as limiting the scope of the present invention.Protection scope of the present invention is as the criterion with appended claims.
Claims (8)
1. a soil thermal desorption rotary furnace test macro, comprise carrier gas device, revolution thermal desorption proving installation and exhaust gas processing device, it is characterized in that: described carrier gas device comprises nitrogen cylinder (1), reduction valve (2) and the corrosion-resistant soft air-guide pipe of air inlet (3), wherein the corrosion-resistant soft air-guide pipe of air inlet (3) is connected on the gas outlet of nitrogen cylinder (1), and reduction valve (2) is located on the corrosion-resistant soft air-guide pipe of air inlet (3);
Described revolution thermal desorption proving installation includes tubular type rotary furnace (7), air inlet air pressure valve (6), flowmeter (5) and air pressure valve of giving vent to anger (9), the inlet end of described tubular type rotary furnace (7) and flowmeter (5) Flange joint, flowmeter (5) is communicated with air inlet air pressure valve (6) again, air inlet air pressure valve (6) is communicated with the corrosion-resistant soft air-guide pipe of the air inlet in carrier gas device (3) by standard rapid-acting coupling again, the outlet side of tubular type rotary furnace (7) and air pressure valve (9) Flange joint of giving vent to anger;
Described exhaust gas processing device includes corrosion-resistant soft air-guide pipe (8) of giving vent to anger, condenser (10), Drexel bottle (13) and active carbon adsorber (14), the air intake opening of described condenser (10) is communicated with corrosion-resistant soft air-guide pipe (8) of giving vent to anger, corrosion-resistant soft air-guide pipe (8) of giving vent to anger is communicated with the air pressure valve of giving vent to anger (9) in revolution thermal desorption proving installation by standard rapid-acting coupling again, the gas outlet of condenser (10) is communicated with the air intake opening of Drexel bottle (13), and the gas outlet of Drexel bottle (13) is communicated with air by active carbon adsorber (14) again;
Described condenser (10) is had at least two and is cascaded by emulsion tube (11);
Described Drexel bottle (13) is had at least two and is cascaded by grass tube (12).
2. soil thermal desorption rotary furnace test macro according to claim 1, is characterized in that: the Ventilation Rate of described nitrogen cylinder (1) is 2ml/min, and venting pressure scope is 0.1MPa ~ 0.15MPa, and the nitrogen gas concn in nitrogen cylinder (1) is 99.9%.
3. soil thermal desorption rotary furnace test macro according to claim 1, is characterized in that: the corrosion-resistant soft air-guide pipe of described air inlet (3) and corrosion-resistant soft air-guide pipe (8) of giving vent to anger are PU soft air-guide pipe.
4. apply a method of testing for the soil thermal desorption rotary furnace test macro in the claims 1 to 3 described in any one, it is characterized in that step is as follows:
The soil sample of step one, collection contaminated soil, natural air drying, removes the foreign material such as rubble, and cross 20 mesh sieves, determine the principal character of soil sample, the principal character of soil sample comprises physicochemical property, pollutant kind, pollutant load;
Step 2, determine some groups of test conditions according to the principal character determined in step one, often organize test condition include Quartz stove tube intraductal atmospheric pressure, the need of condensate water, warming temperature, heating-up time, thermostat temperature, constant temperature time, chilling temperature, cool time, rotary furnace rotating speed;
Step 3, take quantitative soil sample, with material scraper, soil sample is put into the Quartz stove tube of tubular type rotary furnace (7), with stove hook, soil sample is shifted onto the constant temperature zone position of Quartz stove tube middle, then flange is installed, open carrier gas, regulate soil thermal desorption rotary furnace test macro, make soil thermal desorption rotary furnace test macro meet wherein one group of test condition in some groups of test conditions;
Step 4, beginning thermal desorption test experiments, in experimentation, Quartz stove tube rotates with setting speed, heating element is uniformly distributed in the bottom of the burner hearth in tubular type rotary furnace (7), to ensure the thermal desorption effect of the soil sample in stove, thermal desorption gaseous contaminant out enters condenser (10) condensation via corrosion-resistant soft air-guide pipe (8) of giving vent to anger, and condensed gas enters Drexel bottle (13) and active carbon adsorber (14) again, finally becomes clean gas with carrier gas discharged to air;
After step 5, heating terminate, continue logical carrier gas to cool to soil sample, then carrier gas is closed, unload the outlet side of pipe type rotary furnace (7) and the Flange joint of air pressure valve (9) of giving vent to anger, adjustment Quartz stove tube inclination angle, makes soil sample from landing in Quartz stove tube, by soil sample collection, detect its pollutant load, and determine pollutant thermal desorption efficiency;
Step 6, repetition step 3, to step 5, test the thermal desorption efficiency of soil sample under other group test conditions.
5. the method for testing of soil thermal desorption rotary furnace test macro according to claim 4, is characterized in that: before carrying out step 3, the leakproofness of test tubular type rotary furnace (7).
6. the method for testing of soil thermal desorption rotary furnace test macro according to claim 4, is characterized in that: in described step 3, and quantitative soil sample is 50 grams of soil samples.
7. the method for testing of soil thermal desorption rotary furnace test macro according to claim 4, is characterized in that: in described step 3, and the intraductal atmospheric pressure of Quartz stove tube is 0.02 MPa.
8. the method for testing of soil thermal desorption rotary furnace test macro according to claim 4, is characterized in that: in described step 3, the ratio of warming temperature and heating-up time, namely heating rate is 5 ~ 7 DEG C/min.
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| CN103439430A (en) * | 2013-08-30 | 2013-12-11 | 北京市环境保护科学研究院 | Method for determining bioavailability polycyclic aromatic hydrocarbon content in soil based on thermal desorption treatment |
| CN108614001B (en) * | 2016-12-09 | 2021-09-21 | 中国科学院大连化学物理研究所 | Microcell thermal desorption device for determining release amount of semi-volatile organic pollutants and application |
| CN106766910B (en) * | 2016-12-18 | 2023-01-10 | 株洲冶炼集团股份有限公司 | High-temperature corrosion-resistant vacuum synthesis furnace and process method thereof |
| CN107144592A (en) * | 2017-05-12 | 2017-09-08 | 中国科学院南京土壤研究所 | A kind of multiple feasibility study experimental provision of contaminated soil hot repair and method |
| CN107202331B (en) * | 2017-07-14 | 2023-10-03 | 中国环境科学研究院 | Pollutant gas-phase combustion temperature control device |
| CN109000998B (en) * | 2018-09-04 | 2021-01-22 | 株洲时代新材料科技股份有限公司 | Material pyrolysis toxic flue gas collecting device and method |
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| CN102357521A (en) * | 2011-07-19 | 2012-02-22 | 沈阳环境科学研究院 | Continuous direct thermal desorption method for persistent organic polluted soil |
| CN203037598U (en) * | 2012-09-14 | 2013-07-03 | 北京市环境保护科学研究院 | Soil heat desorption rotary furnace test system |
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| JPS6017337A (en) * | 1983-07-08 | 1985-01-29 | Mitsubishi Heavy Ind Ltd | Collecting method of tar |
| CN102357521A (en) * | 2011-07-19 | 2012-02-22 | 沈阳环境科学研究院 | Continuous direct thermal desorption method for persistent organic polluted soil |
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