CN211965362U - Be used for prosthetic burning processing apparatus of contaminated site thermal desorption - Google Patents
Be used for prosthetic burning processing apparatus of contaminated site thermal desorption Download PDFInfo
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- CN211965362U CN211965362U CN201921161486.1U CN201921161486U CN211965362U CN 211965362 U CN211965362 U CN 211965362U CN 201921161486 U CN201921161486 U CN 201921161486U CN 211965362 U CN211965362 U CN 211965362U
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Abstract
The utility model discloses a be used for polluting prosthetic combustion processing device of place thermal desorption, the device contain gas supply unit, combustion air supply unit, the leading-in unit of the waste gas that backflows, combustor, combustion chamber to and switch board. In the device, gas and combustion-supporting air contact through the combustor, are constantly stable burning in the combustion chamber after the ignition of some firearm, produce high temperature flue gas and send into thermal desorption repair system and carry out indirect conduction heat transfer and use. The desorbed organic waste gas generated by the thermal desorption repair system can be sent into the combustion chamber for thermal combustion treatment through the back-burning waste gas guide-in unit of the combustion treatment device. The utility model discloses can use conventional gas fuel as energy source, energy utilization efficiency is high, and system's equipment is simple, safe, stable, reliable, has combustion heat production and waste gas heating power combustion processing function concurrently, can provide stable high temperature burning flue gas heat source and good high concentration desorption organic waste gas heat treatment solution for thermal desorption restoration technique.
Description
Technical Field
The utility model relates to a be used for polluting prosthetic device in place, specifically, relate to a be used for polluting prosthetic combustion processing device of place normal position thermal desorption or heap body formula thermal desorption.
Background
The Thermal Desorption (Thermal Desorption) technology can be widely applied to the in-situ or ex-situ remediation of volatile organic compounds, semi-volatile organic compounds, petroleum hydrocarbons or mercury-polluted sites. The technology heats the polluted soil and/or underground water to be close to or even exceed the boiling point of a target pollutant in a direct or indirect heating mode, selectively promotes the target pollutant to be desorbed, gasified, volatilized, decomposed or increased in fluidity by controlling the system temperature and the high temperature duration, and enables the target pollutant to be separated from a soil medium and removed, thereby achieving the aim of restoring a polluted site.
The in-situ thermal desorption remediation technology can be implemented in situ in a polluted site, does not need to carry out operations such as excavation and the like on polluted soil, and mainly comprises a site in-situ heating unit, a pollutant in-situ extraction unit, a wastewater/waste gas treatment unit and the like. The pile body type thermal desorption restoration technology can be implemented in situ and ex situ in a polluted site, pile bodies are built on the ground after polluted soil is excavated, and then a heating unit and an extraction unit are arranged on the pile bodies and are matched with units for wastewater/waste gas treatment and the like.
The heating unit is the core of the whole in-situ thermal desorption or stack type thermal desorption technology, and converts or transfers energy in different forms such as electric energy, heat energy or chemical energy to a polluted area in modes such as resistance heating, electric-heat conversion or heat conduction heating after combustion heat generation or steam injection heating, so that the polluted soil and/or underground water is gradually heated to reach a target remediation temperature and is maintained for a certain time, and the target pollutants can be separated and removed from the originally existing soil medium.
At present, the engineering application of the in-situ thermal desorption repair technology or the bulk thermal desorption technology in the repair of domestic polluted sites is still limited, and the main reasons for limiting the popularization and the application of the in-situ thermal desorption repair technology or the bulk thermal desorption technology are that temporary large-scale electricity utilization of part of sites is not easy to obtain, the steam injection heating desorption technology is easily limited by soil conditions and target temperature upper limit, the energy cost required by heating is high, the generated desorption waste gas is not easy to treat, and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a be used for polluting prosthetic device in place, heating unit and the exhaust-gas treatment unit not enough to normal position thermal desorption repair techniques or heap body formula thermal desorption repair techniques can use conventional gas fuel as energy source, energy efficiency is high, system equipment is simple, safety, stability, reliably, have the combustion processing apparatus who burns heat production and waste gas heating power burning processing function concurrently, provide stable high temperature burning flue gas heat source and good high concentration desorption organic waste gas thermal treatment solution for thermal desorption repair techniques.
In order to achieve the above object, the utility model provides a be used for polluting prosthetic combustion processing apparatus of place thermal desorption, wherein, the device contain gas supply unit, combustion air supply unit, the leading-in unit of the waste gas that backflows, combustor, combustion chamber to and switch board.
Foretell be used for polluting prosthetic burning processing apparatus of place thermal desorption, wherein, gas supply unit contain the gas supply pipeline to and set gradually gas stop valve, decompression governing valve, the gas manometer on the gas supply pipeline along the gas lets in the direction, the other end of gas supply pipeline gets into in the combustor behind the switch board, is located to be equipped with automatic cutout valve and manual shut-off valve on the gas supply pipeline of switch board.
The combustion treatment device for thermal desorption remediation of the polluted site is characterized in that the combustion-supporting air supply unit comprises a primary air pipeline and a secondary air pipeline; the primary air pipeline is provided with a primary air access regulating valve and a primary air pipeline fan, the primary air pipeline is communicated with the atmosphere at one end provided with the primary air access regulating valve, the other end of the primary air pipeline is communicated with the combustor, the secondary air pipeline is provided with a secondary air access regulating valve and a secondary air pipeline fan, the secondary air pipeline is communicated with the atmosphere at one end provided with the secondary air access regulating valve, and the other end of the secondary air pipeline is communicated with the combustion chamber.
The combustion treatment device for thermal desorption remediation of the polluted site comprises a first pipeline, a second pipeline, a third pipeline, a fourth pipeline and a fourth pipeline, wherein the first pipeline is connected with the second pipeline through a primary air pipeline, the fourth pipeline is connected with the third pipeline through a secondary air pipeline, and the fourth pipeline is connected with the fourth pipeline; the first pipeline is provided with a back-burning waste gas flame distribution access valve, and the second pipeline is provided with a back-burning waste gas flame separation access valve.
The combustion treatment device for thermal desorption remediation of the polluted site is characterized in that the combustor is of a through round tube structure, one end of the combustor is connected with the control cabinet, and the other end of the combustor is introduced into the combustion chamber; the combustor is provided with an outer pipe and an inner pipe which are sleeved; the outer pipe of the burner is communicated with a primary air pipeline through the side surface of the outer pipe of the burner; the gas supply pipeline extends into the bottom of the inner pipe of the combustor from the control cabinet, and a gas burner is arranged at the tail end of the gas supply pipeline positioned in the inner pipe of the combustor; the outlet at the bottom of the inner tube of the burner is a flame-matching combustion area, and a high-pressure igniter and a flame detector are arranged at the position; the ignition head of the high-pressure igniter is positioned at the outlet of the gas burner, and the ignition control switch is arranged in the control cabinet; the probe of the flame detector is arranged at the position of the outlet of the gas burner, which is opposite to the ignition head of the igniter, and the controller of the flame detector is arranged in the control cabinet.
The combustion processing device for thermal desorption remediation of the polluted site is characterized in that the gas supply pipeline is divided into a plurality of parallel branches after entering the control cabinet, each branch is provided with a manual cut-off valve, and the tail end of each branch, which is located in the inner pipe of the combustor, is provided with a gas burner.
The combustion treatment device for thermal desorption remediation of the polluted site is characterized in that the combustion chamber is of a cylindrical tubular structure, one end of the combustion chamber is connected with the combustor, the other end of the combustion chamber is communicated with the heating pipe arranged in the heated soil body, the combustion chamber is communicated with the secondary air pipeline through the side surface of the combustion chamber, and a layer of fire-resistant layer is arranged on the surface of the inner wall of the combustion chamber; the outlet end of the burner is positioned in the combustion chamber, and a flame-leaving combustion area is arranged outside the outlet end of the burner in the combustion chamber.
The combustion treatment device for thermal desorption remediation of the polluted site is characterized in that the control cabinet is provided with a control panel, and the control panel is provided with an operation switch area, an operation indication area and an alarm reset area; the operation switch area is provided with an ignition switch for controlling the high-pressure igniter and pipeline fan switches for respectively controlling the primary air pipeline fan and the secondary air pipeline fan; the operation indication area is provided with a signal indicator lamp for displaying the flame state of the burner and the operation state of each pipeline fan, and the alarm reset area is provided with an acousto-optic alarm lamp and an ignition reset button.
The combustion processing device for thermal desorption remediation of the polluted site is characterized in that the control cabinet is internally provided with a power supply control module, a burner control module, a switch control module, a pressure difference detector, an automatic cut-off valve and a manual cut-off valve, wherein the automatic cut-off valve and the manual cut-off valve are positioned on a gas supply pipeline; the power control module is provided with a power switch, a contactor and an AC-DC power supply; the switch control module controls an ignition switch, a pipeline fan switch and an automatic cut-off valve; the burner control module is provided with a flame detector controller and a high-voltage ignition transformer; and when the flame detector detects that no flame exists at the burner under the non-ignition working condition, the flame detector controller automatically cuts off the gas supply.
The combustion processing device for thermal desorption remediation of the polluted site is characterized in that the pressure difference detector is provided with a pressure sensor, the pressure sensor is communicated with an outer pipe of the combustor through a hose and monitors the internal pressure of the combustor, and when the pressure does not accord with a set value, the control cabinet controls the high-pressure igniter to be incapable of igniting or controls the fuel gas supply to be cut off.
The utility model provides a be used for polluting prosthetic burning processing apparatus of place thermal desorption has following advantage:
the utility model discloses a burning processing apparatus accessible burning thermogenic mode is heat energy with gas fuel's chemical energy conversion, and the high temperature flue gas that directly produces with the device burning heats original place soil or pile body soil as the heat carrier through heat-conducting mode to improve the temperature of polluting soil and realize that the desorption of target pollutant is got rid of. In addition, the high-concentration desorption organic waste gas generated in the thermal desorption repairing process can be sent to a combustion processing device for thermal combustion processing, the chemical energy of the desorbed organic pollutants can be utilized on the premise of finishing the effective processing of the thermal desorption waste gas, the use of gas fuel is saved, and good energy-saving and consumption-reducing effects are realized.
Drawings
Fig. 1 is the utility model discloses a combustion processing device for pollute place thermal desorption restoration's structural schematic.
Fig. 2 is the utility model discloses a control panel schematic diagram for polluting prosthetic combustion processing apparatus of place thermal desorption.
Fig. 3 is the utility model discloses a switch board internal circuit diagram for polluting prosthetic combustion processing apparatus of place thermal desorption.
Wherein: 1. a gas stop valve; 2. a pressure reducing regulating valve; 3. a gas pressure gauge; 4. an automatic shut-off valve; 5. a manual shut-off valve; 6. a burner; 7. primary air is connected into the regulating valve; 8. a primary air duct fan; 9. secondary air is connected into the regulating valve; 10. a secondary air pipeline fan; 11. a combustion chamber; 12. a flame distribution access valve for back-burning exhaust gas; 13. a back-burning waste gas flame separation access valve; 14. an inner tube; 15. burning a nozzle; 16. an outer tube; 17. a flame-matched combustion zone; 18. an igniter; 19. a flame detector; 20. a flame-leaving combustion zone; 21. a refractory layer; 22. a power supply control module; 23. a burner control module; 24. a pressure sensor; 25. an operation switch region; 26. an operation indication area; 27. an alarm reset area; 28. and a switch control module.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1, the utility model provides a be used for polluting prosthetic combustion processing apparatus of place thermal desorption contains gas supply unit, combustion air supply unit, the leading-in unit of the waste gas that backflows, combustor 6, combustion chamber 11 to and the switch board.
The gas supply unit contains the gas supply pipeline to and set gradually gas stop valve 1, decompression governing valve 2, gas pressure table 3 on the gas supply pipeline along the gas lets in the direction, and in the other end of gas supply pipeline passed through the switch board and got into combustor 6, be equipped with automatic cutout valve 4 and manual cutout valve 5 on the gas supply pipeline that is located the switch board. The automatic shut-off valve 4 can automatically shut off the supply of gas in response to an abnormal situation encountered during the operation of the combustion processing apparatus. An external gas source pipeline is connected with the pressure reducing regulating valve 2 through the gas stop valve 1 and then is sent into the combustor 6 through a gas supply pipeline. The automatic cut-off valve 4 is arranged on the gas supply pipeline and arranged in the control cabinet, and the gas supply can be automatically cut off according to the abnormal conditions encountered during the operation of the combustion processing device, so that the safety of the equipment is ensured. The gas flow can be adjusted by the pressure reducing adjusting valve 2.
The combustion-supporting air supply unit comprises a primary air pipeline and a secondary air pipeline; the primary air pipeline is provided with a primary air access adjusting valve 7 and a primary air pipeline fan 8, the primary air pipeline is communicated with the atmosphere at one end provided with the primary air access adjusting valve 7, the other end of the primary air pipeline is communicated with the combustor 6, the secondary air pipeline is provided with a secondary air access adjusting valve 9 and a secondary air pipeline fan 10, the secondary air pipeline is communicated with the atmosphere at one end provided with the secondary air access adjusting valve 9, and the other end of the secondary air pipeline is communicated with the combustion chamber 11. The combustion-supporting air is sent into the combustor 6 through a primary air pipeline and is sent into the combustion chamber 11 through a secondary air pipeline to help the combustion of the fuel gas. The combustion air is fed into the burner 6 through a primary air line and into the combustion chamber 11 through a secondary air line. The combustion air can be fed by the pipeline blower in positive pressure and forms positive pressure combustion at the combustor 6, and can also be sucked by negative pressure generated by the operation of a high-temperature smoke exhaust blower arranged in the thermal desorption unit and forms negative pressure combustion at the combustor 6. The starting and stopping of the pipeline fan can be manually operated through an operation switch on the control cabinet. The combustion air flow rate can be regulated by the pressure-reducing regulating valve 2. Compare negative pressure burning, higher flue gas temperature often can be obtained in the positive pressure burning, and the positive pressure high temperature flue gas has stronger torrent state, and the heat conductivility is stronger.
The leading-in unit of back-burning waste gas contains two pipelines, and wherein the one end of first pipeline is inserted back-burning waste gas, and the other end inserts the primary air pipeline intercommunication between governing valve 7 and the primary air pipeline fan 8 with the primary air, and desorption organic waste gas gets into combustor 6 along with the primary air and forms the flame distribution thermal combustion processing of organic waste gas. And one end of the second pipeline is also connected with the back-burning waste gas, the other end of the second pipeline is communicated with a secondary air pipeline between the secondary air connection adjusting valve 9 and the secondary air pipeline fan 10, and desorbed organic waste gas enters the combustion chamber 11 along with secondary air to form flame-leaving thermal combustion treatment of the organic waste gas. The first pipeline is provided with a back-burning waste gas flame distribution access valve 12, and the second pipeline is provided with a back-burning waste gas flame separation access valve 13. The desorption organic waste gas flow in the two pipelines connected into the back-burning waste gas can be adjusted through respective connecting valves on the pipelines according to the actual conditions of waste gas humidity, organic substance concentration and the like, the stable combustion of the combustor 6 can be realized by the design, the desorption organic waste gas can be completed in a high-temperature section as much as possible, and the waste gas treatment efficiency is improved.
The combustor 6 is a through round tube structure, one end of the combustor is connected with the control cabinet, and the other end of the combustor is introduced into the combustion chamber 11; the combustor 6 is provided with an outer pipe 16 and an inner pipe 14 which are sleeved; the outer pipe 16 of the combustor 6 is communicated with a primary air pipeline through the side surface of the outer pipe; the gas supply pipeline extends into the bottom of an inner pipe 14 of the combustor 6 from the control cabinet, and a gas burner 15 is arranged at the tail end of the gas supply pipeline positioned in the inner pipe 14 of the combustor 6; the outlet of the bottom of the inner pipe 14 of the combustor 6 is provided with a flame-matching combustion area 17, and a high-pressure igniter 18 and a flame detector 19 are arranged at the position; the ignition head of the high-pressure igniter 18 is positioned at the outlet of the gas burner 15, and an ignition control switch is arranged in the control cabinet and used for manually igniting the combustor 6. The probe of the flame detector 19 is arranged at the position of the outlet of the gas burner 15, which is opposite to the ignition head of the igniter 18, and is used for detecting whether flame is burnt at the combustor 6, and the controller of the flame detector 19 is arranged in the control cabinet.
After a gas supply pipeline behind the automatic cut-off valve 4 of the gas supply unit enters the control cabinet, the gas supply pipeline can be divided into a plurality of parallel branches according to the number of the gas burners 15, and preferably 3 branches are selected. Each branch is provided with a manual cut-off valve 5, and the tail end of each branch, which is positioned in an inner pipe 14 of the combustor 6, is provided with a gas burner 15. The gas is discharged from the gas outlet of the gas burner 15 through the gas supply pipeline, contacts and mixes with the surrounding combustion air, and is ignited and combusted by an igniter 18 positioned at the outlet of the gas burner 15. The burner 6 of the multi-burner 15 can adjust the combustion load in a wider range through opening and closing the manual cut-off valve 5 on the branch.
The combustion chamber 11 is positioned below the combustor 6, the combustion chamber 11 is of a cylindrical tubular structure, one end of the combustion chamber is connected with the combustor 6, the other end of the combustion chamber is communicated with a heating pipe arranged in a heating soil body, the combustion chamber 11 is communicated with a secondary air pipeline through the side face of the combustion chamber 11, and the surface of the inner wall of the combustion chamber 11 is provided with a fire-resistant layer 21 made of a fire-resistant material; the outlet end of the burner 6 is located within the combustion chamber 11 and beyond the outlet end of the burner 6 within the combustion chamber 11 is a lifted flame combustion zone 20. The combustion flame continuously and stably burns in the combustion chamber 11 and generates high-temperature flue gas. The refractory material in the combustion chamber 11 has the properties of strong heat storage and poor heat conductivity, so that a good heat preservation effect can be achieved, the heat loss is prevented, a relatively high and stable temperature of the combustion chamber 11 can be maintained, and the stable thermal combustion treatment of the desorbed organic waste gas is ensured.
A control panel is arranged on the control cabinet, and an operation switch area 25, an operation indication area 26 and an alarm reset area 27 are arranged on the control panel; the operation switch area 25 is provided with an ignition switch for controlling the high-pressure igniter 18 and pipeline fan switches for respectively controlling the primary air pipeline fan 8 and the secondary air pipeline fan 10; the operation indication area 26 is provided with a signal indicator lamp for displaying the flame state of the burner 6 and the operation state of each pipeline fan, and the alarm reset area 27 is provided with an audible and visual alarm lamp and an ignition reset button. The ignition switch is used to manually control the operation of the igniter 18 in the burner 6. The pipeline fan switch is used for starting and stopping the primary air pipeline fan 10 and the secondary air pipeline fan 10 and switching the positive and negative pressure combustion states. As shown in fig. 2.
A power supply control module 22, a burner control module 23, a switch control module 28, a pressure difference detector, an automatic cut-off valve 4, a manual cut-off valve 5 and the like which are positioned on a fuel gas supply pipeline are arranged in the control cabinet; the power control module 22 is provided with a power switch, a contactor and an AC-DC power supply; the switch control module 28 controls an ignition switch, a pipeline fan switch and an automatic cut-off valve 4; the burner control module 23 is provided with a flame detector 19 controller and a high-voltage ignition transformer; the flame detector 19 is used for detecting whether flame is burnt at the position of the combustor 6, and when the flame detector 19 detects that no flame exists at the position of the combustor 6 under the non-ignition working condition, the flame detector 19 controller automatically cuts off the gas supply. The control cabinet can be opened, the components and parts arranged inside and outside the control cabinet are all the existing type equipment, and a circuit diagram is shown in figure 3.
The pressure difference detector is provided with a pressure sensor 24, the pressure sensor 24 is communicated with the outer pipe 16 of the combustor 6 through a hose and monitors the internal pressure, and when the pressure does not accord with a set value, the control cabinet controls the high-pressure igniter 18 not to ignite or controls the cut-off of the gas supply. That is, the pressure difference detector analyzes whether combustion air is normally fed into the combustion processing device by detecting the pressure difference between the burner 6 and the external space, and the combustion processing device cannot ignite or automatically cuts off the gas supply when detecting a pressure difference signal which does not meet the design requirement.
The following description will be further made with reference to the embodiments of the present invention for a thermal desorption/remediation combustion processing apparatus for contaminated sites.
Example 1
A combustion treatment device for thermal desorption restoration of a polluted site mainly comprises a gas supply unit, a combustion-supporting air supply unit, a back-burning waste gas introduction unit, a combustor 6, a combustion chamber 11, a control cabinet and other facilities.
(1) A gas supply unit.
The gas self-combustion gas supply pipeline is sequentially conveyed to the combustion processing device through a gas stop valve 1, a pressure reducing regulating valve 2, a gas pressure gauge 3, an automatic stop valve 4 in a control cabinet and a manual stop valve 5 of a gas supply branch. The gas stop valve 1 is operated manually, is normally opened during operation, is kept closed when a system is closed or overhauled, and is cut off from being connected with a gas supply pipeline; the gas pressure is adjusted to a reasonable range through the pressure reducing adjusting valve 2, and the pressure value is displayed through the gas pressure gauge 3; the gas adjusted to the appropriate pressure is automatically controlled to be switched on and off through the automatic cut-off valve 4, then is divided into paths, is respectively in one-to-one correspondence with the burners 15, and a manual cut-off valve 5 is reserved on each path, the number of the burners 15 switched in to operate is selected through manual operation, and finally the burners are conveyed to the combustor 6.
(2) A combustion air supply unit.
The combustion air is divided into primary air and secondary air, and the primary air enters the combustor 6 through a primary air access regulating valve 7 and a primary air pipeline fan 8; the secondary air enters the combustion chamber 11 through a secondary air inlet adjusting valve 9 and a secondary air pipeline fan 10. The adding amount of the primary air is manually adjusted by connecting the primary air into the adjusting valve 7, so that stable combustion after the combustor 6 is ignited and full combustion of the back-burned waste gas as far as possible are realized; the addition of the secondary air is adjusted by the secondary air connection adjusting valve 9, so that the further combustion of the fuel gas and the back-burning waste gas is realized, and the discharge amount of combustion intermediate products in the flue gas is reduced.
The primary air pipeline fan 8 and the secondary air pipeline fan 10 are controlled to be started and stopped through a switch on a control cabinet panel, when the primary air pipeline fan 8 is started, primary air is fed into the combustor 6 in a positive pressure mode, the primary air and fuel gas form a stronger turbulent flow state, and positive pressure combustion is formed after ignition, so that higher flue gas temperature is obtained, and stronger heat conduction capability is formed; when the secondary air pipeline fan 10 is started, secondary air is fed into the combustion chamber 11 in a positive pressure mode, and the secondary air and combustion flame form positive pressure combustion, so that the combustion is more complete, and the discharge amount of combustion intermediate products in smoke is reduced; when the primary air pipeline fan 8 and the secondary air pipeline fan 10 stop, the primary air and the secondary air are sucked by negative pressure generated by the operation of the high-temperature smoke exhaust fan at the tail end of the combustion flue gas system and respectively form negative pressure combustion in the combustor 6 and the combustion chamber 11.
(3) And a back-burning exhaust gas introduction unit.
The introduction of the back-burning waste gas is divided into two paths corresponding to the supply of combustion air, and the introduction path is selected and switched according to the operation condition. The flame-distribution access valve 12 for the back-burning waste gas is positioned in a primary air pipeline, desorbed organic waste gas enters the combustor 6 along with primary air and is fully mixed with gas, and then the organic waste gas is ignited to form flame-distribution thermal combustion treatment of the organic waste gas, so that higher combustion temperature and higher combustion efficiency are realized; the back-burning waste gas flame-separating access valve 13 is positioned in a secondary air pipeline, and if the organic waste gas directly enters the combustor 6 for flame-matching combustion, if the organic waste gas is unstable, the desorbed organic waste gas enters the combustion chamber 11 along with secondary air to form flame-separating thermal combustion treatment of the organic waste gas. The flow ratio of the organic waste gas for flame-matching thermal combustion and flame-leaving thermal combustion can be adjusted through respective access valves.
(4) A burner 6.
The combustor 6 is divided into an inner sleeve and an outer sleeve, a gas burner 15 is arranged in an inner pipe 14 of the combustor 6 and is respectively connected with a gas supply unit, and the number of burners 15 which are switched in for combustion operation is selected through manual operation of manual cut-off valves 5 which are in one-to-one correspondence with the burners 15; the side surface of the outer pipe 16 of the combustor 6 is provided with a primary air access pipeline.
The outlet of the inner tube 14 of the combustor 6 is provided with a flame matching combustion area 17, a high-pressure igniter 18 and a flame detector 19 are arranged to realize the functions of high-pressure ignition and flame detection respectively, the mixed gas after flame matching is ignited and then stably combusted, and a combustion state signal is fed back through the flame detector 19.
(5) A combustion chamber 11.
The combustion chamber 11 is cylindrical, and a secondary air inlet pipeline is arranged on the side surface of the combustion chamber. The mixed gas after flame distribution of the combustor 6 is ignited in the flame distribution combustion area 17 to form stable flame combustion in the combustion chamber 11, secondary air and desorbed waste gas introduced from a secondary air pipeline are in contact with combustion flame in the flame separation combustion area 20 in the combustion chamber 11 to realize complete combustion, high-temperature flue gas generated in the combustion chamber 11 is introduced into a heating pipe arranged for heating soil body through negative pressure generated by operation of a high-temperature smoke exhaust fan at the tail end of the thermal desorption repair system to carry out indirect conduction heat exchange, and thermal desorption repair treatment is realized.
A circle of fireproof heat storage material is attached to the inner wall of the combustion chamber 11, so that flame combustion and stable smoke temperature in the combustion chamber 11 are maintained.
(6) A control cabinet.
The control cabinet comprises a power supply control module 22, a burner control module 23, a switch control module 28, a pressure sensor 24, an automatic fuel gas supply cut-off valve 4, a manual cut-off valve 5 and the like. The power control module 22 includes components such as a power switch, a contactor, an ac-to-dc power supply, and the like, and is used for providing and controlling power supplies of various electric components; the burner control module 23 comprises a flame detection controller, a high-voltage ignition transformer and the like, and is used for controlling combustion ignition and state feedback; the pressure sensor 24 is connected with the outer tube 16 of the burner 6 through a hose and monitors the internal pressure condition thereof, and if the pressure of the outer tube 16 of the burner 6 exceeds a set range, the pressure sensor judges that the supply of combustion air is abnormal, the ignition condition cannot be reached, or the gas supply is cut off.
The control cabinet panel is divided into a plurality of areas, namely an operation switch area 25, an operation indication area 26 and an alarm reset area 27. The operation switch area 25 includes an ignition switch and a duct fan switch; the operation indication area 26 mainly displays the flame state of the burner 6 and the operation state of each duct fan; the alarm and reset area comprises an acousto-optic alarm lamp and an ignition reset button.
The operation process of the combustion treatment device is as follows:
in a flameout state, after an ignition switch is clicked, the control cabinet judges whether an ignition condition is met according to the pressure condition of the outer tube 16 of the combustor 6 monitored by the pressure sensor 24, after the ignition condition is met, the automatic cut-off valve 4 is opened to complete gas supply, then the high-pressure igniter 18 performs high-pressure ignition action, and a combustion state signal is fed back through the flame detector 19.
In the ignition state, after the 'ignition switch' is clicked, the automatic cut-off valve 4 is closed to cut off the gas supply, and the burner 6 is extinguished.
When in ignition, the pressure condition of the outer tube 16 of the combustor 6 does not meet the ignition condition, stable flame is not formed after high-pressure ignition, the flame is automatically extinguished during the operation, and the like, and the system records the fault state and cuts off the automatic cut-off valve 4.
The system fault state is still kept after power failure and recovery, and next ignition can be carried out by checking the reason and manually clicking 'ignition reset'.
The automatic cut-off valve 4 is a power-off automatic cut-off valve.
The utility model provides a be used for polluting prosthetic combustion processing apparatus of place thermal desorption, be to normal position thermal desorption repair techniques or heap body formula thermal desorption repair techniques's heating unit and exhaust-gas treatment unit not enough, one kind of research and development can use conventional gas fuel as energy source, energy efficiency is high, system's equipment is simple, safety, stability, reliability, have the combustion processing apparatus who burns heat production and waste gas heating power burning processing function concurrently, provide stable high temperature burning flue gas heat source and good high concentration desorption organic waste gas thermal treatment solution for thermal desorption repair techniques. In the combustion treatment device, gas and combustion air are contacted through a combustor, are ignited by an igniter and then continuously and stably combust in a combustion chamber, and high-temperature flue gas is generated and sent to a thermal desorption repair system for indirect conduction and heat exchange. The desorbed organic waste gas generated by the thermal desorption repair system can be sent into the combustion chamber for thermal combustion treatment through the back-burning waste gas guide-in unit of the combustion treatment device.
While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (10)
1. A combustion treatment device for thermal desorption remediation of a polluted site is characterized by comprising a gas supply unit, a combustion air supply unit, a back-burning waste gas introduction unit, a combustor, a combustion chamber and a control cabinet; the gas supply unit comprises a gas supply pipeline, and the other end of the gas supply pipeline enters the combustor through the control cabinet; the combustion-supporting air supply unit comprises a primary air pipeline and a secondary air pipeline; one end of the primary air pipeline is communicated with the atmosphere, the other end of the primary air pipeline is communicated with the combustor, one end of the secondary air pipeline is communicated with the atmosphere, and the other end of the secondary air pipeline is communicated with the combustion chamber; the back-burning waste gas leading-in unit comprises two pipelines, one end of the first pipeline is connected with back-burning waste gas, the other end of the first pipeline is communicated with the primary air pipeline, one end of the second pipeline is also connected with back-burning waste gas, and the other end of the second pipeline is communicated with the secondary air pipeline; one end of the combustor is connected with the control cabinet, and the other end of the combustor is introduced into the combustion chamber; the combustor is provided with an outer pipe and an inner pipe which are sleeved; the outer pipe of the burner is communicated with a primary air pipeline through the side surface of the outer pipe of the burner; the combustion chamber is of a cylindrical tubular structure, one end of the combustion chamber is connected with the combustor, the other end of the combustion chamber is communicated with a heating pipe arranged in the heating soil body, and the combustion chamber is communicated with the secondary air pipeline through the side face of the combustion chamber.
2. The combustion processing device for thermal desorption remediation of the contaminated site as claimed in claim 1, wherein the gas supply unit comprises a gas stop valve, a pressure reduction regulating valve and a gas pressure gauge which are sequentially arranged on the gas supply pipeline along a gas introduction direction, and an automatic cut-off valve and a manual cut-off valve are arranged on the gas supply pipeline in the control cabinet.
3. The combustion processing device for thermal desorption remediation of a contaminated site as claimed in claim 1, wherein the primary air pipeline in the combustion air supply unit is provided with a primary air access regulating valve and a primary air pipeline blower, the primary air access regulating valve is arranged on the primary air pipeline communicated with one end of the atmosphere, the secondary air pipeline is provided with a secondary air access regulating valve and a secondary air pipeline blower, and the secondary air access regulating valve is arranged on the secondary air pipeline communicated with one end of the atmosphere.
4. The combustion treatment device for thermal desorption remediation of a contaminated site as claimed in claim 1, wherein the first pipeline of the back-burning waste gas introduction unit is communicated with a portion of the primary air pipeline between the primary air access regulating valve and the primary air pipeline fan, and the second pipeline is communicated with a portion of the secondary air pipeline between the secondary air access regulating valve and the secondary air pipeline fan; the first pipeline is provided with a back-burning waste gas flame distribution access valve, and the second pipeline is provided with a back-burning waste gas flame separation access valve.
5. The combustion treatment device for the thermal desorption remediation of the contaminated site as claimed in claim 1, wherein the burner is of a through-going round tubular structure; the gas supply pipeline extends into the bottom of the inner pipe of the combustor from the control cabinet, and a gas burner is arranged at the tail end of the gas supply pipeline positioned in the inner pipe of the combustor; the outlet at the bottom of the inner tube of the burner is a flame-matching combustion area, and a high-pressure igniter and a flame detector are arranged at the position; the ignition head of the high-pressure igniter is positioned at the outlet of the gas burner, and the ignition control switch is arranged in the control cabinet; the probe of the flame detector is arranged at the position of the outlet of the gas burner, which is opposite to the ignition head of the igniter, and the controller of the flame detector is arranged in the control cabinet.
6. The combustion treatment device for thermal desorption remediation of a contaminated site as claimed in claim 5, wherein the gas supply pipeline is divided into a plurality of parallel branches after entering the control cabinet, each branch is provided with a manual shut-off valve, and each branch is provided with a gas burner at the end thereof located in the inner pipe of the combustor.
7. The combustion treatment device for the thermal desorption remediation of the contaminated site as claimed in claim 1, wherein a layer of refractory layer is arranged on the surface of the inner wall of the combustion chamber; the outlet end of the burner is positioned in the combustion chamber, and a flame-leaving combustion area is arranged outside the outlet end of the burner in the combustion chamber.
8. The combustion processing device for the thermal desorption remediation of the contaminated site as claimed in claim 1, wherein a control panel is arranged on the control cabinet, and an operation switch area, an operation indication area and an alarm reset area are arranged on the control panel; the operation switch area is provided with an ignition switch for controlling the high-pressure igniter and pipeline fan switches for respectively controlling the primary air pipeline fan and the secondary air pipeline fan; the operation indication area is provided with a signal indicator lamp for displaying the flame state of the burner and the operation state of each pipeline fan, and the alarm reset area is provided with an acousto-optic alarm lamp and an ignition reset button.
9. The combustion processing device for thermal desorption remediation of the contaminated site as claimed in claim 8, wherein the control cabinet is internally provided with a power supply control module, a burner control module, a switch control module, a pressure difference detector, an automatic cut-off valve and a manual cut-off valve, wherein the automatic cut-off valve and the manual cut-off valve are positioned on a gas supply pipeline; the power control module is provided with a power switch, a contactor and an AC-DC power supply; the switch control module controls an ignition switch, a pipeline fan switch and an automatic cut-off valve; the burner control module is provided with a flame detector controller and a high-voltage ignition transformer.
10. The combustion treatment device for thermal desorption remediation of a contaminated site as claimed in claim 9, wherein the pressure difference detector is provided with a pressure sensor, and the pressure sensor is communicated with an outer tube of the combustor through a hose and monitors the internal pressure of the combustor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921161486.1U CN211965362U (en) | 2019-07-23 | 2019-07-23 | Be used for prosthetic burning processing apparatus of contaminated site thermal desorption |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921161486.1U CN211965362U (en) | 2019-07-23 | 2019-07-23 | Be used for prosthetic burning processing apparatus of contaminated site thermal desorption |
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| CN211965362U true CN211965362U (en) | 2020-11-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151793A (en) * | 2021-11-30 | 2022-03-08 | 吴东海 | Centralized full-combustion heat restoration intelligent combustor based on gas heat conduction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151793A (en) * | 2021-11-30 | 2022-03-08 | 吴东海 | Centralized full-combustion heat restoration intelligent combustor based on gas heat conduction |
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