CN111503647B - Negative pressure ignition and stable combustion system and ignition and combustion method - Google Patents
Negative pressure ignition and stable combustion system and ignition and combustion method Download PDFInfo
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- CN111503647B CN111503647B CN202010279374.7A CN202010279374A CN111503647B CN 111503647 B CN111503647 B CN 111503647B CN 202010279374 A CN202010279374 A CN 202010279374A CN 111503647 B CN111503647 B CN 111503647B
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 106
- 238000009841 combustion method Methods 0.000 title claims description 4
- 239000007789 gas Substances 0.000 claims abstract description 84
- 239000002737 fuel gas Substances 0.000 claims abstract description 39
- 239000002912 waste gas Substances 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 claims description 28
- 238000001816 cooling Methods 0.000 claims description 24
- 238000009413 insulation Methods 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000000498 cooling water Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000004888 barrier function Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 20
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 12
- 239000001257 hydrogen Substances 0.000 description 12
- 229910052739 hydrogen Inorganic materials 0.000 description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 11
- 239000001301 oxygen Substances 0.000 description 11
- 229910052760 oxygen Inorganic materials 0.000 description 11
- 239000003345 natural gas Substances 0.000 description 10
- 230000001276 controlling effect Effects 0.000 description 9
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004200 deflagration Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010849 combustible waste Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
- F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/26—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid with provision for a retention flame
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q21/00—Devices for effecting ignition from a remote location
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q3/00—Igniters using electrically-produced sparks
- F23Q3/008—Structurally associated with fluid-fuel burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Environmental & Geological Engineering (AREA)
Abstract
The invention discloses a negative pressure ignition and combustion system and a method for negative pressure ignition and stable combustion by using the system, wherein the negative pressure ignition and stable combustion system comprises: the device comprises a fuel gas and combustion-supporting gas supply module, a burner module, a combustion chamber module and a pressure control module; wherein the fuel gas and combustion-supporting gas supply module comprises a fuel gas supply unit and a combustion-supporting gas supply unit; the burner module comprises a burner and an ignition controller; the burner and the exhaust gas inlet pipe are both arranged on the top cover of the combustion chamber module, and the exhaust gas inlet pipe and the top cover of the combustion chamber module form a certain inclination angle in the radial direction and the circumferential direction; the pressure control module is used for maintaining the pressure in the combustion chamber at a stable negative pressure, and the magnitude of the negative pressure can be continuously adjusted within a certain range. The system can be used in a closed environment with severe and unstable air flow change, can provide a stable and reliable high-temperature combustion environment for waste gas treatment, realizes impact-free negative pressure ignition in the ignition process, and ensures stable pressure and flow supply of fuel gas and combustion air in the combustion process, and keeps the negative pressure of the combustion system stable.
Description
Technical Field
The invention belongs to the technical field of waste gas treatment and combustion, and particularly relates to a negative pressure ignition and combustion system and a negative pressure ignition and stable combustion method using the same.
Background
At present, various combustion treatment methods for combustible waste gas exist in the market, but for a closed environment with severe and unstable air flow change, the problems that the pressure fluctuation in the ignition process is severe, the impact on a combustion cavity is large, the deflagration phenomenon can occur, the combustion pressure is difficult to stabilize for a long time, the combustion is insufficient and complete and the like are generally existed.
Patent CN 104235875B discloses an umbrella-shaped ignition device, which can realize the large-scale contact of arc sparks and fuel gas, and has better ignition and fuel gas efficiency, but has complex structure and larger airflow impact in the ignition process.
Patent CN 1232755C discloses a device for compression ignition in a belt and a method of operating the same. The device is used for protecting the combustion chamber from the back pressure generated in the combustion process through a radiator/pressure equalizing chamber, but the structure of the device is complex, and the flame stability and reliability of the combustion gas are not high enough.
Patent CN 102466231B discloses a cyclone oxy-combustion device for exhaust gas treatment, which can generate swirl flame, but has the problems of large pressure impact and unstable flame combustion in the ignition process.
Therefore, in order to solve the problems of the above-mentioned exhaust gas combustion treatment method, it is necessary to develop a technique capable of realizing the impact-free ignition in a closed environment in which the air flow is severely changed and unstable, and providing a stable and reliable high-temperature combustion environment for the treatment of the combustible exhaust gas.
Disclosure of Invention
Aiming at the problems that in the existing exhaust gas combustion treatment method, in a closed environment with severe and unstable air flow change, the pressure fluctuation in the ubiquitous ignition process is severe, the impact on a combustion cavity is large, the deflagration phenomenon possibly occurs, the combustion pressure is difficult to stabilize for a long time, the combustion is insufficient and complete, and the like, the invention provides a method for realizing the impact-free ignition and flame stabilized combustion in the closed space, which is used for providing a stable and reliable high-temperature combustion environment for the exhaust gas treatment in the closed environment with severe and unstable air flow change, and can realize the impact-free negative pressure ignition in the ignition process, and the stable pressure and flow supply of fuel gas and combustion supporting gas in the combustion process, so that the negative pressure of a combustion system is kept stable.
The invention is realized by the following technical scheme: a negative pressure ignition and stable combustion system, the system comprising: the device comprises a fuel gas and combustion-supporting gas supply module, a burner module, a combustion chamber module and a pressure control module; wherein the fuel gas and combustion-supporting gas supply module comprises a fuel gas supply unit and a combustion-supporting gas supply unit; the burner module comprises a burner and an ignition controller; the burner and the exhaust gas inlet pipe are both arranged on the top cover of the combustion chamber module, and the exhaust gas inlet pipe and the top cover of the combustion chamber module form a certain inclination angle in the radial direction and the circumferential direction; the pressure control module is used for maintaining the pressure in the combustion chamber at a stable negative pressure, and the magnitude of the negative pressure can be continuously adjusted within a certain range.
Further, the gas supply unit includes: a gas mass flow meter for controlling a gas intake flow rate; a gas pressure reducing valve for controlling a gas intake pressure; a high voltage switch that provides upper limit protection for the gas intake pressure; a low voltage switch providing lower limit protection for the gas inlet pressure; and the fuel gas electromagnetic valve is used for controlling the on-off of the fuel gas flow.
Further, the combustion-supporting gas supply unit includes: a combustion-supporting gas mass flow meter for controlling a flow rate of combustion-supporting gas intake; the combustion-supporting gas pressure reducing valve is used for controlling the inlet pressure of the combustion-supporting gas; a combustion-supporting gas electromagnetic valve, and controlling the on-off of the combustion-supporting gas flow.
Further, the burner is of a long round tube sleeve structure and consists of an outer round tube, an inner round tube, an ignition needle and a flame detection needle; in the burner, the inner cylinder round tube is a gas pipeline for circulating gas; the annular tube formed between the inner tube round tube and the outer tube round tube is a combustion-supporting gas pipeline for circulating combustion-supporting gas; the ignition needle and the flame detection needle are arranged at the tail end of the burner, and the discharge and ignition of the tip of the ignition needle ignites the fuel gas and the combustion-supporting gas; the flame detector is used for detecting whether ignition is successful or not.
Further, the ignition controller controls the point discharge of the ignition needle to strike sparks, and the flame detection needle detects whether the ignition is successful or not and feeds back a signal to the ignition controller, and the ignition controller confirms whether the ignition is successful or not and controls the ignition and combustion process.
Further, the distance between the ignition needle and the outer wall of the inner cylinder is not more than 5mm, the flame detection needle and the ignition needle are arranged in the opposite direction, and the extension length of the tail end is 30 mm-40 mm.
Further, the combustion chamber is of a cylindrical structure, and the combustion chamber is formed from inside to outside: the combustion chamber, the first heat insulation layer, the second heat insulation layer and the cooling water jacket; wherein the combustion chamber is cylindrical and is wide at the upper part and narrow at the lower part; the first heat insulation layer is in direct contact with the combustion chamber; the second heat insulation layer is positioned between the first heat insulation layer and the cooling water jacket, and the thickness ratio of the first heat insulation layer to the second heat insulation layer is 1:2-1:4; in addition, the combustion chamber module also comprises a temperature sensor which extends into the combustion chamber and is used for detecting the temperature of the inner cavity of the combustion chamber.
Further, the pressure control module comprises a spray cooling chamber, a pressure sensor, an induced draft fan and a frequency converter; the induced draft fan is arranged at the rear end of the combustion chamber, the frequency converter adjusts the operation frequency of the induced draft fan, so that the pressure in the combustion chamber is maintained in a stable negative pressure state, and the magnitude of the negative pressure can be continuously adjusted in a certain range; the spray cooling chamber is internally provided with a plurality of paths of spray water which are continuously sprayed in a radial shape, and a water barrier formed by the spray water is used for isolating the high temperature of the combustion chamber; the pressure sensor is used for measuring the pressure in the spray cooling chamber.
In addition, the invention also provides a method for negative pressure ignition and stable combustion, which comprises the following steps: (1) Cooling water is introduced into the spray cooling chamber, and water flow is kept stable; (2) Starting an induced draft fan, forming negative pressure in the combustion chamber and the spray cooling chamber, wherein a pressure sensor measures the pressure in the spray cooling chamber, and a frequency converter regulates the rotating speed of the induced draft fan; (3) Opening a combustion-supporting gas electromagnetic valve, controlling the flow rate of the combustion-supporting gas by a combustion-supporting gas mass flowmeter, and controlling the pressure of the combustion-supporting gas by a combustion-supporting gas pressure reducing valve; (4) Opening a fuel gas electromagnetic valve, and controlling the fuel gas electromagnetic valve to proportionally extend to a combustion chamber by a fuel gas mass flowmeter; (5) The ignition controller controls the ignition needle at the tail end of the burner to discharge, the fuel gas passes through the circular tube of the inner tube of the burner from top to bottom, the combustion-supporting gas passes through the outer cylinder circular tube of the burner from top to bottom, and is mixed in the discharge area of the ignition needle, and is ignited after encountering spark generated by discharge; (6) The pressure sensor detects the pressure of the spray cooling chamber, and the frequency converter adjusts the rotating speed of the induced draft fan according to the pressure value, so that the pressure in the system is controlled to be stable, and the micro negative pressure state is maintained; (7) After the flame detection needle detects successful ignition, gradually increasing the flow rates of the combustion-supporting gas and the fuel gas according to the preset ratio of the fuel gas to the combustion-supporting gas, and simultaneously continuously adjusting the rotating speed of the induced draft fan through the frequency converter to control the pressure in the combustion chamber to be always micro negative pressure; (8) Repeating the step (7) until the flow rate of the combustion-supporting gas and the flow rate of the fuel gas reach the flow rate required by normal combustion; (9) The temperature sensor detects the temperature change in the combustion chamber in real time, and controls the temperature of the inner cavity of the combustion chamber to be maintained at the temperature required by the reaction by automatically adjusting the flow rates of the fuel gas and the combustion-supporting gas; (10) the waste gas to be treated is slowly introduced.
By adopting the invention, the following beneficial effects can be achieved: the invention can be used in a closed environment with severe and unstable air flow change, can provide a stable and reliable high-temperature combustion environment for waste gas treatment, realizes impact-free negative pressure ignition in the ignition process, and ensures stable pressure and flow supply of fuel gas and combustion air in the combustion process, and keeps the negative pressure of a combustion system stable.
Drawings
FIG. 1 is a schematic process flow diagram of an adjustable negative pressure ignition and stabilization combustion apparatus of the present invention;
FIG. 2 is a schematic view showing the specific structure and composition of the burner and the combustion chamber of the present invention.
Specific examples:
Example 1: referring to fig. 1, natural gas is used as fuel gas, compressed air is used as combustion-supporting gas, and the volume ratio of the compressed air to the natural gas is 5:1-15:1; cooling water is introduced into the spray cooling chamber 51, and the water flow is kept stable. Then, an induced draft fan 53 is started to form negative pressure in the combustion cavity 41 and the spray cooling chamber 51, and the pressure in the spray cooling chamber 51 is measured by a pressure sensor 52; the rotational speed of the induced draft fan 53 is regulated by a frequency converter 54, so that the vacuum degree in the spray cooling chamber 51 is kept constant within the interval of-0.5 to-1 kPa. Then an air electromagnetic valve is opened, combustion air is controlled by an air mass flowmeter to flow at a speed of 30L/min-50L/min, the pressure is about 0.1MPa, and then a gas electromagnetic valve is opened, the air-fuel ratio is 5:1-15:1, natural gas with corresponding flow is controlled by the gas mass flowmeter, and the pressure of the natural gas is about 0.1MPa. The ignition controller is used for realizing the discharge of the ignition needle at the tail end of the burner, natural gas passes through the circular tube of the inner tube of the burner from top to bottom, air passes through the circular tube of the outer tube of the burner from top to bottom, the natural gas and the air are mixed in the discharge area of the ignition needle, and the natural gas and the air are ignited after encountering sparks generated by the discharge, so that the ignition is realized. At the moment of ignition, as the flame expands, the pressure of the system rises, and according to the pressure in the spray cooling chamber 51 measured by the pressure sensor 52, the frequency converter 54 adjusts the rotating speed of the induced draft fan 53, so that the pressure in the system is controlled to be stable, and the micro negative pressure state is maintained. After ignition is successful, the air and natural gas flow rate is gradually increased according to the preset air-fuel ratio, and meanwhile, the rotating speed of the induced draft fan 53 is continuously and automatically adjusted through the frequency converter 54, and the pressure in the combustion chamber is controlled to be always micro negative pressure. Repeatedly adjusting the air and the natural gas until the air and the natural gas reach the flow required by normal combustion; the temperature sensor 45 detects the temperature change in the combustion chamber in real time, and the temperature in the inner cavity of the combustion chamber is controlled to be maintained at the temperature required by the reaction by automatically adjusting the gas and the combustion air quantity. Finally, the waste gas to be treated (the component of which is nitrogen containing 1% of NF 3) is slowly introduced, so that the impact-free ignition and flame stable combustion in the closed space are realized, the system stably operates for 168 hours, and the test removal rate of NF3 is over 99%.
Example 2: referring to fig. 1, hydrogen is used as fuel gas, oxygen is used as combustion air, and the volume ratio of hydrogen to oxygen is 1.5:1-2.5:1. Cooling water is introduced into the spray cooling chamber 45, water flow is kept stable, a draught fan 52 is started, negative pressure is formed in the combustion cavity 41 and the spray cooling chamber 45, and the pressure in the spray cooling chamber 45 is measured by a pressure sensor 51. The rotational speed of the induced draft fan 52 is regulated by a frequency converter 53, so that the vacuum degree in the spray cooling chamber 45 is kept in the interval of-0.5 to-1 kPa and kept constant. Then an oxygen electromagnetic valve is opened, combustion-supporting oxygen is controlled by an oxygen mass flowmeter to flow at a speed of 10L/min-20L/min, the pressure is about 0.1MPa, and then a fuel gas electromagnetic valve is opened, the ratio of hydrogen to oxygen is 2:1, and the hydrogen with the corresponding flow is controlled by a hydrogen mass flowmeter, and the pressure of the hydrogen is about 0.1MPa. The ignition controller is used for realizing the discharge of the ignition needle at the tail end of the burner, hydrogen passes through the circular tube of the inner tube of the burner from top to bottom, oxygen passes through the circular tube of the outer tube of the burner from top to bottom, the hydrogen and the oxygen are mixed in the discharge area of the ignition needle, and the hydrogen are ignited after encountering the spark generated by the discharge, thereby realizing the ignition. At the moment of ignition, as the flame expands, the system pressure rises. According to the pressure in the spray cooling chamber 45 measured by the pressure sensor 51, the frequency converter 53 adjusts the rotation speed of the induced draft fan 52, so that the pressure in the system is controlled to be stable, and the micro negative pressure state is maintained. After ignition is successful, the flow rates of oxygen and hydrogen are gradually increased according to the preset ratio of hydrogen to oxygen, and meanwhile, the rotating speed of the induced draft fan 52 is continuously and automatically adjusted through the frequency converter 53, and the pressure in the combustion chamber is controlled to be always micro negative pressure. And repeatedly adjusting the temperature until the oxygen and the hydrogen reach the flow required by normal combustion and the temperature required by reaction of the inner cavity of the combustion chamber is achieved, so that negative pressure ignition and stable combustion are realized.
While only the preferred embodiments of the present application have been described in detail, it should be appreciated that numerous modifications and variations can be made by those skilled in the art in light of the above teachings, without undue burden, and such modifications and variations can be made in the light of the above teachings, and it is intended that all such modifications and variations be resorted to, falling within the scope of the application as defined by the appended claims.
Claims (6)
1. A negative pressure ignition and stable combustion system, characterized by: the system comprises: the device comprises a fuel gas and combustion-supporting gas supply module, a burner module, a combustion chamber module and a pressure control module; wherein the fuel gas and combustion-supporting gas supply module comprises a fuel gas supply unit and a combustion-supporting gas supply unit; the burner module comprises a burner and an ignition controller; the burner and the exhaust gas inlet pipe are both arranged on the top cover of the combustion chamber module, and the exhaust gas inlet pipe and the top cover of the combustion chamber module form a certain inclination angle in the radial direction and the circumferential direction; the pressure control module is used for maintaining the pressure in the combustion chamber at a stable negative pressure, and the magnitude of the negative pressure can be continuously adjusted in a certain range;
The burner is of a long round tube sleeve structure and consists of an outer tube, an inner tube, an ignition needle and a flame detection needle; in the burner, the inner cylinder round tube is a gas pipeline for circulating gas; the annular tube formed between the inner tube round tube and the outer tube round tube is a combustion-supporting gas pipeline for circulating combustion-supporting gas; the ignition needle and the flame detection needle are arranged at the tail end of the burner, and the discharge and ignition of the tip of the ignition needle ignites the fuel gas and the combustion-supporting gas; the flame detection needle is used for detecting whether ignition is successful or not;
The combustion chamber is of a cylindrical structure, and comprises the following parts from inside to outside: the combustion chamber, the first heat insulation layer, the second heat insulation layer and the cooling water jacket; wherein the combustion chamber is cylindrical and is wide at the upper part and narrow at the lower part; the first heat insulation layer is in direct contact with the combustion chamber; the second heat insulation layer is positioned between the first heat insulation layer and the cooling water jacket, and the thickness ratio of the first heat insulation layer to the second heat insulation layer is 1:2-1:4; in addition, the combustion chamber module also comprises a temperature sensor which extends into the combustion chamber and is used for detecting the temperature of the inner cavity of the combustion chamber;
The pressure control module comprises a spray cooling chamber, a pressure sensor, an induced draft fan and a frequency converter; the induced draft fan is arranged at the rear end of the combustion chamber, the frequency converter adjusts the operation frequency of the induced draft fan, so that the pressure in the combustion chamber is maintained in a stable negative pressure state, and the magnitude of the negative pressure can be continuously adjusted in a certain range; the spray cooling chamber is internally provided with a plurality of paths of spray water which are continuously sprayed in a radial shape, and a water barrier formed by the spray water is used for isolating the high temperature of the combustion chamber; the pressure sensor is used for measuring the pressure in the spray cooling chamber.
2. A negative pressure ignition and stable combustion system as claimed in claim 1, wherein: the gas supply unit includes: a gas mass flow meter for controlling a gas intake flow rate; a gas pressure reducing valve for controlling a gas intake pressure; a high voltage switch that provides upper limit protection for the gas intake pressure; a low voltage switch providing lower limit protection for the gas inlet pressure; and the fuel gas electromagnetic valve is used for controlling the on-off of the fuel gas flow.
3. A negative pressure ignition and stable combustion system as claimed in claim 1, wherein: the combustion-supporting gas supply unit includes: a combustion-supporting gas mass flow meter for controlling a flow rate of combustion-supporting gas intake; the combustion-supporting gas pressure reducing valve is used for controlling the inlet pressure of the combustion-supporting gas; a combustion-supporting gas electromagnetic valve, and controlling the on-off of the combustion-supporting gas flow.
4. A negative pressure ignition and stable combustion system as claimed in claim 1, wherein: the ignition controller controls the ignition needle to discharge and strike sparks, and the flame detection needle detects whether ignition is successful or not and feeds back a signal to the ignition controller, and the ignition controller confirms whether ignition is successful or not and controls ignition and combustion processes.
5. A negative pressure ignition and stable combustion system as claimed in claim 1, wherein: the distance between the ignition needle and the outer wall of the inner cylinder is not more than 5mm, the flame detection needle and the ignition needle are arranged in the opposite direction, and the extension length of the tail end is 30-40 mm.
6. An ignition and combustion method using the negative pressure ignition and stable combustion system according to any one of claims 1 to 5, characterized in that: the ignition and combustion comprises the following steps: (1) Cooling water is introduced into the spray cooling chamber, and water flow is kept stable; (2) Starting an induced draft fan, forming negative pressure in the combustion chamber and the spray cooling chamber, wherein a pressure sensor measures the pressure in the spray cooling chamber, and a frequency converter regulates the rotating speed of the induced draft fan; (3) Opening a combustion-supporting gas electromagnetic valve, controlling the flow rate of the combustion-supporting gas by a combustion-supporting gas mass flowmeter, and controlling the pressure of the combustion-supporting gas by a combustion-supporting gas pressure reducing valve; (4) Opening a fuel gas electromagnetic valve, and controlling the fuel gas electromagnetic valve to proportionally extend to a combustion chamber by a fuel gas mass flowmeter; (5) The ignition controller controls the ignition needle at the tail end of the burner to discharge, the fuel gas passes through the circular tube of the inner tube of the burner from top to bottom, the combustion-supporting gas passes through the outer cylinder circular tube of the burner from top to bottom, and is mixed in the discharge area of the ignition needle, and is ignited after encountering spark generated by discharge; (6) The pressure sensor detects the pressure of the spray cooling chamber, and the frequency converter adjusts the rotating speed of the induced draft fan according to the pressure value, so that the pressure in the system is controlled to be stable, and the micro negative pressure state is maintained; (7) After the flame detection needle detects successful ignition, gradually increasing the flow rates of the combustion-supporting gas and the fuel gas according to the preset ratio of the fuel gas to the combustion-supporting gas, and simultaneously continuously adjusting the rotating speed of the induced draft fan through the frequency converter to control the pressure in the combustion chamber to be always micro negative pressure; (8) Repeating the step (7) until the flow rate of the combustion-supporting gas and the flow rate of the fuel gas reach the flow rate required by normal combustion; (9) The temperature sensor detects the temperature change in the combustion chamber in real time, and controls the temperature of the inner cavity of the combustion chamber to be maintained at the temperature required by the reaction by automatically adjusting the flow rates of the fuel gas and the combustion-supporting gas; (10) the waste gas to be treated is slowly introduced.
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| CN202010279374.7A CN111503647B (en) | 2020-04-10 | 2020-04-10 | Negative pressure ignition and stable combustion system and ignition and combustion method |
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| CN113483334A (en) * | 2021-07-08 | 2021-10-08 | 陕西青朗万城环保科技有限公司 | Method and device for enhancing combustion of solid particles by microwaves |
| CN114263913B (en) * | 2021-12-14 | 2023-10-13 | 北京京仪自动化装备技术股份有限公司 | Control method of exhaust gas treatment combustion device and exhaust gas treatment combustion device |
| CN117366592B (en) * | 2023-11-13 | 2024-05-24 | 成都市齐易机械电气有限责任公司 | Plasma ignition system of emptying torch |
| JP7492799B1 (en) | 2024-02-22 | 2024-05-30 | 株式会社福島県南環境衛生センター | Processing Equipment |
| CN118328399B (en) * | 2024-04-11 | 2024-12-13 | 湖北凯比思智能设备有限公司 | High-concentration odor combustion management system suitable for flow fluctuation |
| CN118564919B (en) * | 2024-08-01 | 2024-10-25 | 杭州老板电器股份有限公司 | Blast burner and control method and device thereof |
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| CN110878940B (en) * | 2019-12-09 | 2025-04-29 | 河南华索科技有限公司 | Burners with automatic air supply, ignition and fire detection for carbon electrode or cathode baking furnaces |
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| CN213019666U (en) * | 2020-04-10 | 2021-04-20 | 中国船舶重工集团公司第七一八研究所 | Negative pressure ignition and stable combustion system |
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