CN211694888U - Gas thermal desorption combustion device - Google Patents
Gas thermal desorption combustion device Download PDFInfo
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- CN211694888U CN211694888U CN202020099157.5U CN202020099157U CN211694888U CN 211694888 U CN211694888 U CN 211694888U CN 202020099157 U CN202020099157 U CN 202020099157U CN 211694888 U CN211694888 U CN 211694888U
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Abstract
The utility model discloses a gas thermal desorption combustion device, which comprises a fan, a gas mixer, a flame tube and a heat conducting tube; the gas mixer is provided with an air inlet, a fuel gas inlet and a mixed gas outlet, the fan is in butt joint with the air inlet, and the flame tube is in butt joint with the mixed gas outlet; the flame tube is inserted into the heat conducting cylinder, an ignition needle is arranged on the flame tube, an interlayer is arranged in the heat conducting cylinder, and heat conducting oil is filled in the interlayer. The embodiment of the utility model provides a with the help of flame tube ignition burning in the heating well, the heat of burning passes through the heat conduction section of thick bamboo wall and is absorbed the conduction to whole barrel by the heat conduction oil, and heat is from interior toward quick conduction outward, and the barrel surface forms comparatively even stabilizing temperature, to the stratum synchronous heating of the different degree of depth, reaches similar electrode heating effect, can realize the even synchronous heating to the different degree of depth stratum, and it is fast to have a rate of heating, and heat utilization is high, and the ability loss is little, and repair cost low grade advantage.
Description
Technical Field
The utility model belongs to the technical field of the gas combustion, especially, relate to a gas thermal desorption burner.
Background
In recent years, with the continuous acceleration of urbanization construction in China, a large number of chemical enterprises are forced to move or shut down, and a large number of organic pollution plots are left in cities and surrounding areas. In urban construction, pollution restoration and treatment must be carried out when the polluted land is utilized, and the harm to the human health and the ecological environment is avoided.
The background of the application of the gas thermal desorption technology is described in more detail in the text "research and application progress of gas thermal desorption technology for organic pollutant remediation on site" volume 13, 9 th month, 9 th year, 2019, of the environmental engineering journal, and the text is cited in the text which is described later. Among a plurality of soil remediation technologies, the in-situ thermal desorption technology is one of the most potential technologies for remedying the organic contaminated soil at present, and is particularly suitable for remedying the large-area organic contaminated soil. The basic principle of the in-situ thermal desorption technology is that the temperature of a polluted area is increased through heating, the physicochemical property of pollutants is changed, and the concentration of the pollutants in a gas phase or a liquid phase is increased, so that the removal rate of the pollutants by liquid phase extraction or soil gas phase extraction is increased.
According to different heating modes, the in-situ thermal desorption technology can be divided into steam enhanced extraction technology, resistance heating technology, heat conduction technology and the like. The heat conduction technology is divided into electric heating and gas thermal desorption. Gas Thermal Desorption (GTD) is a method of heating contaminated soil by using a heat source generated by combustion of Gas, and desorbing organic pollutants to further treat wastewater and exhaust Gas. The developed countries in Europe and America have preliminary research and application on GTD technology, and are still in the beginning stage in China.
Compared with electric heating, the Gas Thermal Desorption (GTD) technology has the technical advantages of convenient gas delivery and transportation, lower requirement on site foundation conditions, quick start, flexible operation and the like, but also has the technical defects of higher energy consumption than electric heating, uneven heating on different stratums and the like.
The heating mode of the high-temperature gas of the polluted soil of the existing GTD technology is that the high-temperature gas generated by gas combustion enters a heating well through a guide pipe and is heated from the bottom, so that the heating temperature at the bottom is highest, the gradually upward heating energy input is very low, and different stratum soils are difficult to reach uniform target temperature.
SUMMERY OF THE UTILITY MODEL
The technical problem that this application embodiment will solve provides a gas thermal desorption burner that heats evenly.
Therefore, the embodiment of the application provides a gas thermal desorption combustion device, which comprises a fan, a gas mixer, a flame tube and a heat conducting cylinder;
the gas mixer is provided with an air inlet, a fuel gas inlet and a mixed gas outlet, the fan is in butt joint with the air inlet, and the flame tube is in butt joint with the mixed gas outlet;
the flame tube is inserted into the heat conducting cylinder, an ignition needle is arranged on the flame tube, an interlayer is arranged in the heat conducting cylinder, and heat conducting oil is filled in the interlayer.
In some embodiments, a support seat is arranged at one end of the heat conducting cylinder, which is far away from the flame tube, and an exhaust channel is formed on the support seat.
In some embodiments, the flame tube is a stainless steel tube made of 430.
In some embodiments, the fan is an axial fan.
In some embodiments, the gas mixer employs a venturi.
In some embodiments, the gas mixer is connected to the flame tube and the heat conducting tube with a connecting flange.
In some embodiments, a gas control valve is provided on the gas inlet.
In some embodiments, a temperature sensor is arranged on the heat conduction cylinder, and the temperature sensor, the gas control valve and the fan are all in telecommunication connection with the heating control system.
In some embodiments, a conduction oil filling port and a temperature measuring hole are reserved at the top of the heat conduction cylinder.
Compared with the prior art, the embodiment of the utility model provides an with the help of flame tube ignition burning in the heating well, the heat of burning passes through the heat conduction section of thick bamboo wall and absorbs conduction to whole barrel by the heat conduction oil, and heat is from interior toward quick conduction outward, and the barrel surface forms comparatively even stabilizing the temperature, to the stratum synchronous heating of the different degree of depth, reaches similar electrode heating effect, can realize the even synchronous heating to the different degree of depth stratum, and it is fast to have a rate of heating, and heat utilization is high, and the ability loss is little, and repair cost low grade advantage.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a gas thermal desorption combustion device provided by an embodiment of the application.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, the embodiment of the present application provides a gas thermal desorption combustion apparatus, including a fan 1, a gas mixer 2, a flame tube 3 and a heat conduction tube 4. Be equipped with air inlet on the gas mixer 2, gas inlet and mist export, fan 1 docks with air inlet, flame pipe 3 docks with the mist export, flame pipe 3 inserts in heat conduction section of thick bamboo 4, and be equipped with ignition needle 5 on it, the ignition end of ignition needle 5 extends to the flame pipe 3 and keeps away from a department of gaseous mixture chamber 2, be equipped with the intermediate layer in the heat conduction section of thick bamboo 4, it has conduction oil 9 to fill in the intermediate layer, the gas is gone into to be equipped with on the door and is fired control valve 6, temperature sensor 7 on the heat conduction section of thick bamboo 4.
In the embodiment, the heat conducting cylinder 5 is designed to be a sealed hollow cavity structure, the top of the heat conducting cylinder is reserved with the filling port 11 and the temperature measuring hole, the heat conducting cylinder is cast by adopting a silicon-aluminum material, the length of the cylinder body is the same as the depth of the heating well, the bottom of the heat conducting cylinder is provided with 4 overhead supporting seats 8, and the height of each supporting seat 8 is 0.3-0.5 m.
Referring to fig. 1, in an actual use process, aiming at a heating well with a depth of 18m, a heat conduction cylinder 5 is placed in a heating well 10, a heat conduction oil KDOC-350 is filled in an inner cavity of the heat conduction cylinder 5, a temperature sensor 7 is inserted into a temperature measuring hole in the top of the heat conduction cylinder 5, a fuel gas control valve 6, the temperature sensor 7 and a fan 1 are all in communication connection with a heating control system to form a heating control circuit, and the heating control circuit is designed conventionally in the electric control field and is not repeated herein. The flame tube 3 is inserted into the heat conducting tube 5, the insertion distance is 2/3 of the length of the main body of the heat conducting tube 4, namely 12m, and the mixed gas outlet of the gas mixer 2 is connected with the flame tube 3 and the heat conducting tube 5 by adopting a connecting flange. The bottom support seat 8 of the heat conduction cylinder 5 is contacted with the bottom of the heating well 10, and an exhaust channel is formed at the bottom of the heat conduction cylinder 5.
In this example, the flame tube 3 is a stainless steel tube made of 430 materials, the fan 1 is an adjustable pressure axial flow fan, and the gas mixer 2 is designed by a venturi tube and is respectively connected with the combustion fan 1 and the flame tube 3 at two ends. Of course, the fan 1 may be a centrifugal fan or a rotary fan.
Referring to fig. 1, in practical application, a gas collecting hood 12 is further arranged at the top of the flame tube 3, and after the flame tube 3 and the heat conducting cylinder 4 are inserted into the heating well 10, the gas collecting hood 12 is covered at the well mouth of the heating well 10, so that waste gas generated in the treatment process is collected, the collected waste gas is treated by a tail gas tail water treatment system and is discharged after reaching the standard, and the purpose of removing pollutants is achieved.
It can be understood that ignition combustion is carried out in a heating well, a combustion fan needs to keep a certain air pressure, the length of combustion flame of a flame spraying pipe is controlled to be 0.5-1m, the combustion flame heats a heat conducting cylinder, heat conducting oil in the heat conducting cylinder 4 conducts heat to the surface of a cylinder body, soil around the heat conducting cylinder is heated, the heat continuously enters soil gaps and diffuses around, a heating device control system controls the temperature of heat conducting oil to be 300 ℃ by controlling the gas and air entering amount and the combustion time, the heat insulation effect is achieved, the heating mode is adopted to achieve the restoration target temperature of 220 ℃, and the optimal heat utilization rate and restoration speed are achieved.
This application embodiment is on the basis of current gas thermal desorption GTD technique, changes the high-temperature gas guide tube into the flame pipe, at a heat conduction heat transfer device of flame pipe external suit: the heat conduction section of thick bamboo in the heater shaft is heated to the heat conduction section of thick bamboo in the heater shaft during gas burning, and the heat conduction section of thick bamboo absorbs, the contaminated soil heating of conduction heat to heater shaft periphery, makes the soil temperature rise to restoration target temperature through combustor control system, temperature sensor to realize pollutant desorption or pyrolysis reaction, discharge after handling up to standard by extraction, collection and tail gas tail water treatment system again, realize the pollutant and get rid of the purpose.
The above examples are merely illustrative of the present invention clearly and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.
Claims (10)
1. The utility model provides a gas thermal desorption burner which characterized in that: comprises a fan, a gas mixer, a flame tube and a heat-conducting cylinder;
the gas mixer is provided with an air inlet, a fuel gas inlet and a mixed gas outlet, the fan is in butt joint with the air inlet, and the flame tube is in butt joint with the mixed gas outlet;
the flame tube is inserted into the heat conducting cylinder, an ignition needle is arranged on the flame tube, an interlayer is arranged in the heat conducting cylinder, and heat conducting oil is filled in the interlayer.
2. The apparatus of claim 1, wherein: and one end of the heat conducting cylinder, which is far away from the flame tube, is provided with a supporting seat, and an exhaust channel is formed on the supporting seat.
3. The apparatus of claim 1, wherein: and a gas collecting hood is also arranged at one end of the flame tube close to the gas mixer.
4. The apparatus of claim 1, wherein: the fan is an axial flow fan, a centrifugal fan or a rotary fan.
5. The apparatus of claim 1, wherein: the gas mixer adopts a Venturi tube.
6. The apparatus of claim 1, wherein: the gas mixer is connected with the flame tube and the heat conducting cylinder by adopting a connecting flange.
7. The apparatus of any one of claims 1-6, wherein: and a gas control valve is arranged on the gas inlet.
8. The apparatus of claim 7, wherein: and the heat-conducting cylinder is provided with a temperature sensor, and the temperature sensor, the gas control valve and the fan are all in telecommunication connection with the heating control system.
9. The apparatus of claim 8, wherein: and a heat conduction oil filling port and a temperature measuring hole are reserved at the top of the heat conduction cylinder.
10. The apparatus of claim 8, wherein: the heat conducting cylinder is made of silicon-aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020099157.5U CN211694888U (en) | 2020-01-16 | 2020-01-16 | Gas thermal desorption combustion device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020099157.5U CN211694888U (en) | 2020-01-16 | 2020-01-16 | Gas thermal desorption combustion device |
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| CN211694888U true CN211694888U (en) | 2020-10-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112642846A (en) * | 2020-12-01 | 2021-04-13 | 中建八局环保科技有限公司 | Heating well structure for in-situ gas thermal desorption technology |
| CN113333451A (en) * | 2021-06-03 | 2021-09-03 | 重庆环投再生资源开发有限公司 | Heavy metal contaminated soil chemical remediation safety regeneration equipment |
-
2020
- 2020-01-16 CN CN202020099157.5U patent/CN211694888U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112642846A (en) * | 2020-12-01 | 2021-04-13 | 中建八局环保科技有限公司 | Heating well structure for in-situ gas thermal desorption technology |
| CN113333451A (en) * | 2021-06-03 | 2021-09-03 | 重庆环投再生资源开发有限公司 | Heavy metal contaminated soil chemical remediation safety regeneration equipment |
| CN113333451B (en) * | 2021-06-03 | 2022-09-16 | 重庆环投再生资源开发有限公司 | Heavy metal contaminated soil chemical remediation safety regeneration equipment |
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