阅读说明：本技术 一种多模式纯氧燃烧方法及装置 (Multi-mode pure oxygen combustion method and device ) 是由 王开兵 刘继雄 滕飞 徐亚军 钟小禹 于 2021-07-26 设计创作，主要内容包括：本发明涉及纯氧燃烧的技术领域,更具体地,涉及一种多模式纯氧燃烧方法及装置,通过采集燃烧室内部的温度,并将燃烧室内部的温度与预设温度进行比较,判断燃烧室内部的燃烧工况,调整燃料及纯氧的供给：当燃烧室内温度较低时,进入第一工作模式,增大燃料供给快速提高燃烧室的温度；当燃烧室内温度持续升高且仍低于预设温度时,进入第二工作模式,减少燃料供给并增大纯氧供给,以维持燃烧；当燃烧室温度达到预设温度时,进入第三工作模式,切断燃料的供给,只提供纯氧辅助燃烧；当燃烧室温度高于预设温度时,调整纯氧的供给,使燃烧室内的温度维持在一个安全合理的范围。本发明可通过监控燃烧工况实时调整切换燃烧器的燃料供给模式。(The invention relates to the technical field of pure oxygen combustion, in particular to a multi-mode pure oxygen combustion method and a multi-mode pure oxygen combustion device, wherein the method comprises the following steps of collecting the temperature inside a combustion chamber, comparing the temperature inside the combustion chamber with a preset temperature, judging the combustion working condition inside the combustion chamber, and adjusting the supply of fuel and pure oxygen: when the temperature in the combustion chamber is low, entering a first working mode, increasing the fuel supply and quickly increasing the temperature in the combustion chamber; when the temperature in the combustion chamber is continuously increased and still lower than the preset temperature, entering a second working mode, reducing the fuel supply and increasing the pure oxygen supply to maintain the combustion; when the temperature of the combustion chamber reaches the preset temperature, entering a third working mode, cutting off the supply of fuel and only providing pure oxygen for auxiliary combustion; when the temperature of the combustion chamber is higher than the preset temperature, the supply of pure oxygen is adjusted, so that the temperature in the combustion chamber is maintained in a safe and reasonable range. The invention can adjust and switch the fuel supply mode of the burner in real time by monitoring the combustion condition.)

1. A multi-mode pure oxygen combustion method is characterized by comprising the following steps:

s1: collecting the temperature inside the combustion chamber (8);

s2: comparing the collected temperature with a preset temperature;

s3: when the collected temperature is lower than the preset temperature, controlling the combustor (7) to enter a first working mode: the fuel supply is increased, and the temperature in the combustion chamber (8) is rapidly increased; when the temperature collected continuously rises and is still lower than the preset temperature, the burner (7) is controlled to enter a second working mode: the fuel supply is reduced, the pure oxygen supply is increased, and the combustion is maintained; when the collected temperature reaches the preset temperature, controlling the combustor (7) to enter a third working mode: the fuel supply is cut off, and only pure oxygen is provided for auxiliary combustion; when the collected temperature is higher than the preset temperature, the supply of pure oxygen is adjusted, and the temperature in the combustion chamber (8) is controlled to be maintained within a safe temperature range.

2. The multimode pure oxygen combustion method according to claim 1, wherein in step S1, a temperature sensor is used to collect the temperature inside the combustion chamber (8).

3. The multimode pure oxygen combustion method as claimed in claim 1, wherein the preset temperature is adjusted according to different operating conditions and a calorific value of the object to be combusted in step S2.

4. A multi-mode pure oxygen combustion apparatus for performing the multi-mode pure oxygen combustion method according to any one of claims 1 to 3, it is characterized by comprising a combustion chamber (8) and a plurality of combustors (7) which are connected, a temperature measuring instrument (1), a monitoring system (2), a control valve group (3), a pure oxygen pipeline (6) and an alternating pipeline, the temperature measuring instrument (1) is arranged on the inner wall of the combustion chamber (8), the temperature measuring instrument (1) is in signal connection with the monitoring system (2), the monitoring system (2) is in signal connection with the control valve group (3), the pure oxygen pipeline (6) and the alternating pipeline are both connected between the output end of the control valve group (3) and the combustor (7), the input end of the control valve group (3) is also respectively communicated with a pure oxygen tank (33) and a fuel tank (34).

5. The multi-mode pure oxygen combustion device according to claim 4, wherein a first pipeline (71), a second pipeline (72) and a third pipeline (73) are arranged in the combustor (7), the alternating pipelines comprise a first alternating pipeline (4) and a second alternating pipeline (5), one end of the first pipeline (71) is connected with the first alternating pipeline (4), and the other end of the first pipeline (71) is communicated with the combustion chamber (8); one end of the second pipeline (72) is connected with the second alternating pipeline (5), and the other end of the second pipeline (72) is communicated with the combustion chamber (8); one end of the third pipeline (73) is connected with the pure oxygen pipeline (6), and the other end of the third pipeline (73) is communicated with the combustion chamber (8).

6. The multi-mode pure oxygen combustion device according to claim 5, wherein the second conduit (72) is an annular conduit that surrounds the first conduit (71).

7. The multi-mode pure oxygen combustion device according to claim 6, wherein the control valve set (3) comprises a three-position four-way electromagnetic directional valve (31) and a two-position two-way electromagnetic valve (32) which are respectively in signal connection with the monitoring system (2), the input ends of the three-position four-way electromagnetic directional valve (31) and the two-position two-way electromagnetic valve (32) are both communicated with the pure oxygen tank (33), the input end of the three-position four-way electromagnetic directional valve (31) is communicated with the fuel tank (34), the output end of the three-position four-way electromagnetic directional valve (31) is respectively connected with the first alternating pipeline (4) and the second alternating pipeline (5), and the output end of the two-position two-way electromagnetic valve (32) is connected with the pure oxygen pipeline (6).

8. The multi-mode pure oxygen combustion device according to any one of claims 4 to 7, wherein the burner (7) is connected with a mounting portion mounted on the outer wall of the combustion chamber (8), and the mounting portion is provided with a plurality of positioning holes (74).

9. The multimode pure oxygen combustion device according to any one of claims 4 to 7, wherein the temperature measuring instrument (1) is a temperature sensor.

10. The multimode pure oxygen combustion device according to any one of claims 4 to 7, wherein the combustion chamber (8) is in communication with a flue (9).

Technical Field

The invention relates to the technical field of pure oxygen combustion, in particular to a multi-mode pure oxygen combustion method and device.

Background

In the msw incineration in-process, in order to improve msw incineration's efficiency, restrain the gaseous production of NOx simultaneously, take the mode of injecting pure oxygen and a small amount of combustion-supporting gas at the incineration in-process, make the inside core combustion area of burning furnace present the effect of a pure oxygen burning, come the aggravation to burn the inside oxidation combustion reaction of burning furnace, improve work efficiency, restrain the gaseous production of NOx simultaneously.

The reference document CN20617636U discloses a pure oxygen combustor, including breather and the furnace of connection, wherein breather includes flue gas pipeline and the primary pure oxygen pipeline that stretches into furnace, secondary pure oxygen pipeline and gas pipeline, the high temperature region in the combustion process has effectively been dispersed with the mode of pipeline nestification each other, it is more abundant to make the burning, it is more even to heat, set up the governing valve on primary pure oxygen pipeline, secondary pure oxygen pipeline, and the gas pipeline, this scheme is in the combustion process, the flow speed of pure oxygen and coal gas in the accessible governing valve control pipeline, control burning speed and degree, but in this scheme, in whole combustion process, continuously provide fuel and pure oxygen in the burning furnace, the combustion mode is single, the fuel supply mode of the real-time adjustment switching combustor according to the operating mode of the way.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a multi-mode pure oxygen combustion method and device, which can adjust and switch the fuel supply mode of a combustor in real time according to the combustion working condition.

In order to solve the technical problems, the invention adopts the technical scheme that:

a multi-mode pure oxygen combustion method is provided, which comprises the following steps:

s1: collecting the temperature inside the combustion chamber;

s2: comparing the collected temperature with a preset temperature;

s3: when the collected temperature is lower than the preset temperature, controlling the combustor to enter a first working mode: the fuel supply is increased, and the temperature in the combustion chamber is rapidly increased; when the collected temperature is continuously increased and still lower than the preset temperature, controlling the combustor to enter a second working mode: the fuel supply is reduced, the pure oxygen supply is increased, and the combustion is maintained; when the collected temperature reaches the preset temperature, controlling the combustor to enter a third working mode: the fuel supply is cut off, and only pure oxygen is provided for auxiliary combustion; and when the collected temperature is higher than the preset temperature, adjusting the supply of pure oxygen, and controlling the temperature in the combustion chamber to be maintained within a safe temperature range.

The multimode pure oxygen combustion method of the invention judges the combustion condition in the combustion chamber by collecting the temperature in the combustion chamber and comparing the temperature in the combustion chamber with the preset temperature, and adjusts the supply of fuel and pure oxygen: when the temperature in the combustion chamber is low, entering a first working mode, and rapidly increasing the temperature of the combustion chamber by increasing the fuel supply; when the temperature in the combustion chamber is continuously increased and still lower than the preset temperature, entering a second working mode, reducing the fuel supply and increasing the pure oxygen supply to maintain the combustion; when the temperature of the combustion chamber reaches the preset temperature, a third working mode is entered, the supply of fuel is cut off, only pure oxygen is provided for auxiliary combustion, and heat is provided in the combustion chamber by the heat value of the burnt object; when the temperature of the combustion chamber is higher than the preset temperature, the supply of pure oxygen is adjusted, so that the temperature in the combustion chamber is maintained in a safe and reasonable range. The multi-mode pure oxygen combustion method can adjust and switch the fuel supply mode of the combustor in real time according to the combustion working condition.

Preferably, in step S1, a temperature sensor may be used to collect the temperature inside the combustion chamber.

Preferably, in step S2, the preset temperature may be adjusted according to different operating conditions and the calorific value of the object to be burned.

The invention also provides a multi-mode pure oxygen combustion device which is used for executing the multi-mode pure oxygen combustion method and comprises a combustion chamber and a plurality of combustors which are connected, and the multi-mode pure oxygen combustion device also comprises a temperature measuring instrument, a monitoring system, a control valve group, a pure oxygen pipeline and an alternating pipeline, wherein the temperature measuring instrument is arranged on the inner wall of the combustion chamber, the temperature measuring instrument is in signal connection with the monitoring system, the monitoring system is in signal connection with the control valve group, the pure oxygen pipeline and the alternating pipeline are both connected between the output end of the control valve group and the combustors, and the input end of the control valve group is also respectively communicated with a pure oxygen tank and a fuel tank.

The multi-mode pure oxygen combustion device monitors the temperature in the combustion chamber through the temperature measuring instrument, and converting the collected temperature into an electric signal, transmitting the electric signal to a monitoring system through a lead, processing the electric signal by the monitoring system, converting the electric signal into a digital signal, comparing the digital signal with a preset temperature set in the monitoring system, making a judgment, then a control signal is sent out to control the working state of the control valve group, the control valve group can control a pure oxygen pipeline to supply pure oxygen or cut off, control an alternating pipeline to supply pure oxygen or fuel or cut off, different pure oxygen and fuel supply modes can be provided for the combustor, and the aim of multi-mode pure oxygen combustion is further achieved, the closed-loop feedback control can be realized for the whole device, the supply regulation of fuel and pure oxygen and the switching of the working mode of the combustion device are not needed to be manually intervened, and the labor intensity is reduced.

Furthermore, a first pipeline, a second pipeline and a third pipeline are arranged in the combustor, the alternating pipelines comprise a first alternating pipeline and a second alternating pipeline, one end of the first pipeline is connected with the first alternating pipeline, and the other end of the first pipeline is communicated with the combustion chamber; one end of the second pipeline is connected with the second alternating pipeline, and the other end of the second pipeline is communicated with the combustion chamber; one end of the third pipeline is connected with a pure oxygen pipeline, and the other end of the third pipeline is communicated with the combustion chamber. The first pipeline and the second pipeline which are arranged on the combustor directly communicate the combustion chamber with the alternating pipeline, the third pipeline directly communicates the combustion chamber with the pure oxygen pipeline, and the combustor has the advantages of simple structure, easy processing and low manufacturing cost

Further, the second pipeline is a ring pipeline, and the ring pipeline surrounds the first pipeline.

Further, the control valve group comprises a three-position four-way electromagnetic directional valve and a two-position two-way electromagnetic valve which are respectively connected with a monitoring system signal, the input ends of the three-position four-way electromagnetic directional valve and the two-position two-way electromagnetic valve are communicated with a pure oxygen tank, the input end of the three-position four-way electromagnetic directional valve is communicated with a fuel tank, the output end of the three-position four-way electromagnetic directional valve is respectively connected with a first alternating pipeline and a second alternating pipeline, and the output end of the two-position two-way electromagnetic valve is connected with the pure oxygen pipeline.

Further, the combustor is connected with the installation department of installing in the combustion chamber outer wall, the locating hole has been seted up to the installation department.

Further, the temperature measuring instrument is a temperature sensor.

Further, the combustion chamber is communicated with a flue.

Compared with the background technology, the multimode pure oxygen combustion method and the multimode pure oxygen combustion device have the beneficial effects that:

the fuel supply mode of the burner can be adjusted and switched in real time according to the combustion condition; the burner has simple structure, easy processing and reduced production cost.

Drawings

FIG. 1 is a flow chart of a multi-mode pure oxygen combustion method according to one embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a multi-mode pure oxygen combustion apparatus according to a second embodiment of the present invention;

FIG. 3 is a schematic view of a burner according to a second embodiment of the present invention;

FIG. 4 is a schematic diagram of the connection of a control valve assembly according to a second embodiment of the present invention;

in the drawings: 1-a temperature measuring instrument; 2-a monitoring system; 3-control valve group; 31-a three-position four-way electromagnetic directional valve; 32-two-position two-way electromagnetic valve; 33-a pure oxygen tank; 34-a fuel tank; 4-a first alternating conduit; 5-a second alternating conduit; 6-pure oxygen pipeline; 7-a burner; 71-a first conduit; 72-a second conduit; 73-a third line; 74-positioning holes; 8-a combustion chamber; 9-flue.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.

Example one

As shown in fig. 1, a multi-mode pure oxygen combustion method includes the following steps:

s1: collecting the temperature inside the combustion chamber 8;

s2: comparing the collected temperature with a preset temperature;

s3: when the temperature collected is lower than the preset temperature, the burner 7 is controlled to enter a first operating mode: the fuel supply is increased, and the temperature in the combustion chamber 8 is rapidly increased; when the temperature collected is continuously raised and still lower than the preset temperature, the burner 7 is controlled to enter a second operating mode: the fuel supply is reduced, the pure oxygen supply is increased, and the combustion is maintained; when the collected temperature reaches the preset temperature, the burner 7 is controlled to enter a third working mode: the fuel supply is cut off, and only pure oxygen is provided for auxiliary combustion; when the collected temperature is higher than the preset temperature, the supply of pure oxygen is adjusted, and the temperature in the combustion chamber 8 is controlled to be maintained within a safe temperature range.

The multi-mode pure oxygen combustion method comprises the following steps of collecting the temperature inside the combustion chamber 8, comparing the temperature inside the combustion chamber 8 with the preset temperature, judging the combustion working condition inside the combustion chamber 8, and adjusting the supply of fuel and pure oxygen: when the temperature in the combustion chamber 8 is low, the temperature of the combustion chamber 8 is rapidly increased by increasing the fuel supply; when the temperature in the combustion chamber 8 continues to rise and is still lower than the preset temperature, the fuel supply is reduced and the pure oxygen supply is appropriately increased to maintain combustion; when the temperature of the combustion chamber 8 reaches the preset temperature, the supply of fuel is cut off, only pure oxygen is provided for auxiliary combustion, and heat is provided inside the combustion chamber 8 by the heat value of the burnt objects; when the temperature of the combustion chamber 8 is higher than the preset temperature, the supply of pure oxygen is adjusted, so that the temperature in the combustion chamber 8 is maintained in a safe and reasonable range, and the energy waste is reduced. The multi-mode pure oxygen combustion method can adjust and switch the fuel supply mode of the combustor 7 in real time according to the combustion working condition.

In step S1, the temperature inside the combustion chamber 8 may be collected using a temperature sensor. During implementation, the combustor 7 is connected with the combustion chamber 8, and temperature sensors are respectively arranged on two sides of the combustor 7 and are mounted on the inner wall of the combustion chamber 8. It should be noted that, the temperature sensors may be disposed in the circumferential direction of the combustor 7, and the temperatures collected by the temperature sensors may be compared with the preset temperature, so as to determine the combustion condition of the portion near the combustor 7 inside the combustion chamber 8, and control the supply of the pure oxygen and the fuel of the combustor 7 at different portions respectively.

In step S2, the preset temperature may be adjusted according to different operating conditions and the heat value of the object to be burned.

Example two

As shown in fig. 2, a multi-mode pure oxygen combustion apparatus for carrying out the multi-mode pure oxygen combustion method of embodiment one, including connecting combustion chamber 8 and a plurality of combustor 7 that set up, still include temperature measurement instrument 1, monitored control system 2, valve block 3, pure oxygen pipeline 6 and alternating pipeline, temperature measurement instrument 1 is installed in 8 inner walls of combustion chamber, temperature measurement instrument 1 and monitored control system 2 signal connection, monitored control system 2 and valve block 3 signal connection, pure oxygen pipeline 6 and alternating pipeline all are connected between the output of valve block 3 and combustor 7, the input of valve block 3 still communicates pure oxygen jar and fuel jar respectively.

The multi-mode pure oxygen combustion device monitors the temperature in the combustion chamber 8 through the temperature measuring instrument 1, converts the collected temperature into an electric signal and transmits the electric signal to the monitoring system 2 through a lead, the monitoring system 2 processes and converts the electric signal into a digital signal, the digital signal is compared with the preset temperature set in the monitoring system 2 to make a judgment, then a control signal is sent out to control the working state of the control valve group 3, the control valve group 3 can control the pure oxygen pipeline 6 to supply pure oxygen or cut off, control the alternating pipeline to supply pure oxygen or fuel or cut off, different pure oxygen and fuel supply modes can be provided for the combustor 7, and the aim of multi-mode pure oxygen combustion is achieved. The labor intensity is reduced.

As shown in fig. 2 to 4, a first pipeline 71, a second pipeline 72 and a third pipeline 73 are arranged in the combustor 7, the alternating pipelines include a first alternating pipeline 4 and a second alternating pipeline 5, one end of the first pipeline 71 is connected with the first alternating pipeline 4, and the other end of the first pipeline 71 is communicated with the combustion chamber 8; one end of the second pipeline 72 is connected with the second alternating pipeline 5, and the other end of the second pipeline 72 is communicated with the combustion chamber 8; one end of the third pipeline 73 is connected to the pure oxygen pipeline 6, and the other end of the third pipeline 73 is communicated with the combustion chamber 8. During implementation, pure oxygen can be introduced into the first alternating pipeline 4 and the second alternating pipeline 5, or fuel can be introduced into the first alternating pipeline, or the first alternating pipeline and the second alternating pipeline are cut off, and the pure oxygen pipeline 6 can be introduced with the pure oxygen or cut off to adapt to different combustion working conditions. The first pipeline 71 and the second pipeline 72 which are arranged on the combustor 7 directly communicate the combustion chamber 8 with the alternating pipeline, the third pipeline 73 directly communicates the combustion chamber 8 with the pure oxygen pipeline 6, and the combustor 7 is simple in structure, easy to process and low in manufacturing cost.

The second line 72 is a ring line which surrounds the first line 71, as shown in fig. 3. When the high-temperature-zone combustion device is implemented, when pure oxygen and fuel are respectively introduced into the first alternating pipeline 4 and the second alternating pipeline 5 or fuel and pure oxygen are respectively introduced into the first alternating pipeline 4 and the second alternating pipeline 5, the high-temperature zone in the combustion process can be effectively dispersed, the combustion is more sufficient, and the heating is more uniform.

The control valve group 3 comprises a three-position four-way electromagnetic directional valve 31 and a two-position two-way electromagnetic valve 32 which are respectively in signal connection with the monitoring system 2, the input ends of the three-position four-way electromagnetic directional valve 31 and the two-position two-way electromagnetic valve 32 are both connected with a pure oxygen tank 33 for storing pure oxygen, the input end of the three-position four-way electromagnetic directional valve 31 is also connected with a fuel tank 34 for storing fuel, the output end of the three-position four-way electromagnetic directional valve 31 is connected with a first alternating pipeline 4 and a second alternating pipeline 5, and the output end of the two-position two-way electromagnetic valve 32 is connected with a pure oxygen pipeline 6, as shown in fig. 4. In implementation, the pure oxygen tank 33 and the fuel tank 34 are respectively communicated with the control valve group 3 according to the connection relationship to introduce pure oxygen and fuel, for one combustor 7, the pure oxygen can be communicated with the pure oxygen pipeline 6 through the two-position two-way electromagnetic valve 32 to be connected to the third pipeline 73 of the combustor 7, and the third pipeline 73 is in a cut-off state in a normal state; pure oxygen or fuel can be communicated with the first alternating pipeline 4 through the three-position four-way electromagnetic directional valve 31 and then connected into the first pipeline 71 of the combustor 7, or pure oxygen or fuel can be communicated with the second alternating pipeline 5 through the three-position four-way electromagnetic directional valve 31 and then connected into the second pipeline 72 of the combustor 7.

Specifically, when the three-position four-way electromagnetic directional valve 31 is located at the upper working position and the two-position two-way electromagnetic valve 32 is not electrified, the pure oxygen is communicated with the first alternating pipeline 4 through the three-position four-way electromagnetic directional valve 31 and is connected to the first pipeline 71, the fuel is communicated with the second alternating pipeline 5 through the three-position four-way electromagnetic directional valve 31 and is connected to the second pipeline 72, the third pipeline 73 is cut off, and the interior of the combustion chamber 8 is in a low-temperature safe combustion mode; when the three-position four-way electromagnetic reversing valve 31 is located at the lower working position and the two-position two-way electromagnetic valve 32 is not electrified, the pure oxygen is communicated with the second alternating pipeline 5 through the three-position four-way electromagnetic reversing valve 31 and is connected to the second pipeline 72, the fuel is communicated with the first alternating pipeline 4 through the three-position four-way electromagnetic reversing valve 31 and is connected to the first pipeline 71, the third pipeline 73 is cut off, and the interior of the combustion chamber 8 is in a medium-temperature dispersion combustion mode; when the three-position four-way electromagnetic directional valve 31 is not electrified and the two-position two-way electromagnetic valve 32 is located at the upper working position, the pure oxygen is communicated with the pure oxygen pipeline 6 through the two-position two-way electromagnetic valve 32 and is connected into the third pipeline 73, the first pipeline 71 and the second pipeline 72 are cut off, and the combustion chamber 8 is internally in a high-temperature oxygen injection combustion mode.

As shown in fig. 3, the burner 7 is provided with a positioning hole 74, the burner 7 is connected with the combustion chamber 8 through a connecting member, and the connecting member is engaged with the positioning hole 74.

The temperature measuring instrument 1 is a temperature sensor. During implementation, the combustor 7 is connected with the combustion chamber 8, and temperature sensors are respectively arranged on two sides of the combustor 7 and are mounted on the inner wall of the combustion chamber 8. The temperature sensor can have and set up in a plurality of combustor 7 circumference, compares through the temperature that gathers a plurality of temperature sensor with predetermineeing the temperature, can judge the combustion operating mode of the inside position that is located near combustor 7 of combustion chamber 8, controls the supply of the pure oxygen of combustor 7 and the fuel of different positions respectively. It should be noted that other temperature measuring instruments 1 capable of monitoring the temperature in the combustion chamber 8 in the present embodiment are applicable to the present embodiment.

As shown in fig. 2, the combustion chamber 8 is communicated with a flue 9 for discharging combustion exhaust gas in the combustion chamber 8.

In the detailed description of the embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.