CN115585478A - Plasma ignition control system and method - Google Patents
Plasma ignition control system and method Download PDFInfo
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- CN115585478A CN115585478A CN202211405470.7A CN202211405470A CN115585478A CN 115585478 A CN115585478 A CN 115585478A CN 202211405470 A CN202211405470 A CN 202211405470A CN 115585478 A CN115585478 A CN 115585478A
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- plasma
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
- F23Q7/02—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs for igniting solid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
- F23Q7/22—Details
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Plasma Technology (AREA)
Abstract
The application discloses a plasma ignition control system and method, including: a plasma ignition device, a burner detection device and a generator control device; the plasma ignition device is used for igniting the coal dust and comprises a plasma burner and a plasma generator; a burner detecting device for detecting combustion data of the plasma burner in a combustion process of the pulverized coal; generator control means for controlling the plasma generator based on the combustion data. So, in this application, through the real-time combustion data that detects plasma burner, control plasma generator for plasma generator can the automatic start operation or close the operation, and then has satisfied intelligent control's operation demand.
Description
Technical Field
The present disclosure relates to plasma technologies, and in particular, to a plasma ignition control system and method.
Background
With the continuous development of thermal power generation, plasma ignition technology has been widely applied in the field of boiler ignition. The ignition capability of the plasma ignition technology in the boiler starting process meets the operation requirement of the boiler, and the effect on energy conservation and consumption reduction is obvious.
However, the plasma ignition system of the existing power plant still mainly adopts manual operation, such as automatic start operation and automatic shutdown operation of a plasma generator, and the like, and has the problem of low intelligent degree of system operation, and does not meet the requirement of intelligent ignition construction.
Therefore, how to automatically adjust the operation of the plasma generator is a major concern to those skilled in the art.
Disclosure of Invention
In view of the above, the present application provides a plasma ignition control system and method to automatically adjust the operation of a plasma generator. The embodiment of the application discloses the following technical scheme:
in a first aspect, the present application discloses a plasma ignition control system comprising: the plasma ignition device, the burner detection device and the generator control device;
the plasma ignition device is used for igniting coal powder and comprises a plasma burner and a plasma generator, wherein the first end of the plasma burner is connected with the first end of the plasma generator, the second end of the plasma burner is connected with the first end of the burner detection device, the second end of the burner detection device is connected with the first end of the generator control device, and the second end of the generator control device is connected with the second end of the plasma generator;
the combustor detection device is used for detecting combustion data of the plasma combustor in the combustion process of the pulverized coal;
the generator control means is configured to control the plasma generator based on the combustion data.
Optionally, the generator control device is specifically configured to:
initiating operation of the plasma generator in response to the combustion data being less than a first threshold.
Optionally, the generator control device is further configured to:
stopping operation of the plasma generator in response to the combustion data being greater than or equal to the first threshold.
Optionally, the plasma ignition device further includes a rectifier cabinet, a third end of the plasma generator is connected to the rectifier cabinet, and the rectifier cabinet is configured to provide a power supply condition for the plasma generator, so that the plasma generator generates a plasma arc.
Optionally, the plasma generator includes a cooling water inlet pipeline, a cooling water outlet pipeline and an air inlet pipeline, the cooling water inlet pipeline and the cooling water outlet pipeline are used for cooling the plasma generator, and the air inlet pipeline is used for providing carrier air for the plasma generator.
Optionally, the plasma ignition device further comprises a pipeline pressure detection device, the pipeline pressure detection device is mounted on the air inlet pipeline, and the pipeline pressure detection device is used for detecting the pressure value of the air inlet pipeline.
Optionally, the plasma ignition device further includes an air volume adjusting door, and the air volume adjusting door is connected to the air inlet pipeline and is configured to respond to that the pressure value is smaller than the second threshold value, and control an opening degree of the air volume adjusting door.
Optionally, the plasma ignition device further comprises a plasma fire detection probe, the plasma fire detection probe is installed above the plasma burner and used for detecting the flame state of the pulverized coal in the combustion process, so that the power of the plasma generator is adjusted based on the flame state.
In a second aspect, the present application discloses a plasma ignition control method, comprising:
acquiring combustion data;
controlling a plasma generator according to the combustion data.
Optionally, the controlling the plasma generator according to the combustion data includes:
initiating operation of the plasma generator in response to the combustion data being less than a first threshold.
Compared with the prior art, the method has the following beneficial effects:
the utility model provides combustor detection device and generator controlling means to be connected it with plasma burner and plasma generator, then with the burning data of the plasma burner that combustor detection device detected out, transmit generator controlling means, generator controlling means controls plasma generator based on burning data. So, in this application, through the real-time combustion data that detects plasma burner, control plasma generator for plasma generator can the automatic start operation or close the operation, and then has satisfied intelligent control's operation demand.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic connection diagram of a plasma ignition control system according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a plasma ignition control method according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.
It should be noted that the above description is only an example of a plasma ignition control system and method and the field of plasma technology provided by the present application, and does not limit the application field of the names of the method and the apparatus provided by the present application.
As described above, in the prior art, the plasma ignition system of the power plant still mainly uses manual operations, such as automatic start operation and automatic shutdown operation of the plasma generator, and the like, which has the problem of low degree of intellectualization of the system operation and does not meet the requirement of intelligent ignition construction. Therefore, how to automatically adjust the operation of the plasma generator is a major concern to those skilled in the art.
The inventor proposes a technical scheme of the present application, and the present application proposes a burner detection device and a generator control device, and connects them with a plasma burner and a plasma generator, and then transmits combustion data of the plasma burner detected by the burner detection device to the generator control device, and the generator control device controls the plasma generator based on the combustion data. So, in this application, through the real-time combustion data that detects plasma burner, control plasma generator for plasma generator can the automatic start operation or close the operation, and then has satisfied intelligent control's operation demand.
The meanings of terms that may be referred to in the present specification are described next.
Plasma: the plasma is in a fourth substance form except solid, liquid and gas, and the plasma technology has wide application prospects in the energy and chemical industry, such as treatment of fine chemical industry, waste gas, waste water and solid waste, safe disposal of hazardous chemicals and the like.
Plasma ignition technology: the method is characterized in that direct current air plasma is used as an ignition source, and oil-free ignition combustion technology without oil drop is realized during cold start of a boiler. Plasma has a combustion promoting characteristic, and plasma combustion systems mainly include a combustion system, a wind powder system, a plasma generator, an electrical system, a plasma air system, a plasma cooling water system and the like.
A plasma generator: the main working principle of the plasma generator is to ionize air (mainly oxygen) by using positive high voltage and negative high voltage to generate a large amount of positive ions and negative ions, wherein the quantity of the negative ions is greater than that of the positive ions (the quantity of the negative ions is about 1.5 times of that of the positive ions).
Plasma burner: the plasma burner ignites the pulverized coal by using high-temperature plasma generated by a plasma generator at the initial stage of the pulverized coal entering the burner, the pulverized coal is ignited by using the high-temperature plasma in the burner, the pulverized coal is ignited in stages in the burner, the flame is amplified step by step, and the flame with the length of 3-10 meters can be formed at the nozzle of the burner.
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic connection diagram of a plasma ignition control system according to an embodiment of the present application, as shown in fig. 1:
the plasma ignition control system includes: plasma ignition device, combustor detection device and generator control device. The plasma ignition device comprises a plasma burner and a plasma generator, the burner detection device is used for detecting combustion data of the plasma burner in the combustion process of the pulverized coal, and the generator control device is used for controlling the plasma generator based on the combustion data. It should be noted that the combustion data includes operating parameters such as boiler load, furnace negative pressure, and combustor wall temperature in the plasma combustor, and the combustion data is obtained by real-time detection by the combustor detection device.
Furthermore, the connection mode of the burner detection device, the generator control device, the plasma burner and the plasma generator is as follows: the first end of the plasma burner is connected with the first end of the plasma generator, the second end of the plasma burner is connected with the first end of the burner detection device, the second end of the burner detection device is connected with the first end of the generator control device, and the second end of the generator control device is connected with the second end of the plasma generator.
Specifically, the burner detection means sends the detection data to the generator control means after detecting the combustion data of the plasma burner, so that the generator control means controls the plasma generator based on the combustion data. When the combustion data is smaller than the first threshold value, the generator control device starts the plasma generator to operate, namely when the combustion data does not reach the preset combustion condition, the plasma generator is started to operate, so that the combustion condition is provided for the plasma burner, and the combustion condition in the plasma burner reaches the optimal working condition. And when the plasma generator is operated, the detected combustion data is greater than or equal to a first threshold value, and the generator control device stops the operation of the plasma generator so as to maintain the combustion condition in the plasma burner at the optimal working condition.
In an embodiment, the plasma ignition device further comprises a rectifier cabinet for providing power supply conditions for the plasma generator so that the plasma generator generates plasma arc to ignite the pulverized coal with the plasma arc. The rectifier cabinet is mainly internally provided with a high-power thyristor or IGBT, a direct-current reactor, an alternating-current contactor, a control PLC and the like. Wherein, the third end of the plasma generator is connected with the rectifier cabinet. It should be noted that after the plasma generator generates the plasma arc, the carrier air is provided by the air inlet pipe in the plasma generator to convert the plasma arc into the arc required in the combustion process.
The plasma generator is used for generating high-temperature plasma arc and mainly comprises an anode assembly and a cathode assembly, and a support bracket is matched with the field installation. The anode assembly consists of anode, cooling water channel, compressed air channel, casing, etc. The anode assembly consists of an anode, a cooling water channel, a compressed air channel, a shell and the like; the cathode assembly comprises a cathode head, an outer sleeve, an inner sleeve, a driving mechanism, a water inlet and a water outlet, a conductive joint and the like. Air between the electrodes is ionized to form plasma with high temperature conducting characteristic, the positively charged ions flow to the negative pole of the power supply to form the cathode of the arc, and the negatively charged ions and electrons flow to the positive pole of the power supply to form the anode of the arc. The construction of the plasma generator is prior art and will not be described in detail herein. The carrier wind is a medium of the plasma arc, and the high-pressure air is blown out of the anode at a certain flow rate to form the arc required in the combustion process.
The plasma ignition device also comprises a pipeline pressure detection device, the pipeline pressure detection device is arranged on the air inlet pipeline and is used for detecting the pressure value of the air inlet pipeline and sending the pressure value to the generator control device; the plasma ignition device further comprises an air volume adjusting door, the air volume adjusting door is connected with the air inlet pipeline and used for responding to the fact that the pressure value is smaller than the second threshold value, and the generator control device controls the opening degree of the air volume adjusting door to guarantee normal operation of the plasma generator. It can be understood that if the pressure value is smaller than the second threshold value, the opening degree of the air volume adjusting valve is increased; and if the pressure value is greater than or equal to the second threshold value, reducing the opening degree of the air volume adjusting valve.
The plasma ignition device further comprises a plasma fire detection probe, the plasma fire detection probe is installed above the plasma burner and installed in a secondary air channel above the plasma burner, the plasma fire detection probe is used for detecting the flame state of pulverized coal in the combustion process and sending the flame state to the burner detection device, and the burner detection device sends the flame state to the generator control device so that the generator control device can adjust the power of the plasma generator based on the flame state. The combustor detection device can acquire flame video information, the generator control device judges the combustion condition of the pulverized coal through the flame video information, and if the combustion condition is poor, the power of the plasma generator is improved; if the combustion condition is good, the power of the plasma generator is reduced.
Specifically, plasma generator includes cooling water inlet pipe way, cooling water outlet pipe way and air inlet pipeline, and cooling water inlet pipe way and cooling water outlet pipe way are used for cooling to plasma generator, and the air inlet pipeline is used for providing carrier wind to plasma generator, and carrier wind is used for converting the plasma electric arc into the required electric arc in the combustion process.
It should be noted that, a cooling water temperature measuring device may be installed on the cooling water inlet pipeline and the cooling water outlet pipeline for detecting the temperature of the inlet water and the outlet water. It can be understood that after the plasma arc is formed, the temperature of the arc column is generally in the range of 5000K to 10000K, so that the cathode and the anode of the plasma generator for forming the arc must be cooled by water cooling, otherwise the cathode and the anode can be burnt out quickly, and the temperature of the cooling water cannot be higher than 40 ℃, otherwise the cooling effect is poor. Wherein, in order to reduce the corrosion of the cooling water to the anode and the cathode, the desalting chemical water of a power plant can be adopted.
In addition, in this application, can also install generator controlling means in the switch board, this switch board can also adjust the current signal of rectifier cabinet to install the operation panel on the switch board cabinet door, in order to show burning data. The control cabinet is also connected with an upper computer, and the upper computer is used for storing combustion data and recording the input and output of the operation data of each device.
It can be seen that in this alternative, the present application proposes a burner detection device and a generator control device, and connects them with a plasma burner and a plasma generator, and then transmits combustion data of the plasma burner detected by the burner detection device to the generator control device, which controls the plasma generator based on the combustion data. So, in this application, through the real-time combustion data that detects plasma burner, control plasma generator for plasma generator can the automatic start operation or close the operation, and then has satisfied intelligent control's operation demand.
A plasma ignition control method provided in the present application is explained below by way of another embodiment.
Referring to fig. 2, which is a flowchart of a plasma ignition control method provided in an embodiment of the present application, as shown in fig. 2, the method may include:
s101: combustion data is acquired.
In this step, combustion data of pulverized coal in the plasma combustor is acquired by the combustor detection device. The combustion data can comprise operation parameters such as boiler load, hearth negative pressure and combustor wall temperature in the plasma combustor, the combustion data is obtained by real-time detection of the combustor detection device, and the combustion data can also comprise flame state during pulverized coal combustion.
S102: controlling a plasma generator according to the combustion data.
In this step, after the burner detection device acquires the combustion data, the generator control device controls the plasma generator according to the combustion data. Specifically, when the combustion data is smaller than the first threshold, the generator control device starts the plasma generator to operate, that is, when the combustion data does not reach a preset combustion condition, the plasma generator is started to operate, so that a combustion condition is provided for the plasma burner, and the combustion condition in the plasma burner reaches an optimal working condition.
Further, when the plasma generator is operated, if the detected combustion data is greater than or equal to the first threshold value, the generator control device stops the operation of the plasma generator so as to maintain the combustion condition in the plasma burner at the optimum working condition.
In summary, this alternative illustrates how the operation of the plasma generator can be automatically adjusted. Specifically, in this alternative, after combustion data of pulverized coal in the plasma burner is acquired, the plasma generator is controlled according to the combustion data. So, in this application, through the real-time combustion data that detects plasma burner, control plasma generator for plasma generator can the automatic start operation or close the operation, and then has satisfied intelligent control's operation demand.
It should be noted that, in the names "first" and "second" (if any), the names "first" and "second" mentioned in the embodiments of the present application are only used for name identification, and do not represent the sequential first and second.
A plasma ignition control system and method provided by the present application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (10)
1. A plasma ignition control system, comprising: a plasma ignition device, a burner detection device and a generator control device;
the plasma ignition device is used for igniting coal powder and comprises a plasma burner and a plasma generator, wherein the first end of the plasma burner is connected with the first end of the plasma generator, the second end of the plasma burner is connected with the first end of the burner detection device, the second end of the burner detection device is connected with the first end of the generator control device, and the second end of the generator control device is connected with the second end of the plasma generator;
the combustor detection device is used for detecting combustion data of the plasma combustor in the combustion process of the pulverized coal;
the generator control means is configured to control the plasma generator based on the combustion data.
2. The system according to claim 1, characterized in that the generator control means are particularly adapted to:
initiating operation of the plasma generator in response to the combustion data being less than a first threshold.
3. The system of claim 2, wherein the generator control device is further configured to:
stopping operation of the plasma generator in response to the combustion data being greater than or equal to the first threshold.
4. The system of claim 1, wherein the plasma ignition device further comprises a rectifying cabinet, and a third terminal of the plasma generator is connected to the rectifying cabinet, and the rectifying cabinet is used for providing a power supply condition for the plasma generator so that the plasma generator generates a plasma arc.
5. The system of claim 1, wherein the plasma generator comprises a cooling water inlet pipeline, a cooling water outlet pipeline and an air inlet pipeline, the cooling water inlet pipeline and the cooling water outlet pipeline are used for cooling the plasma generator, and the air inlet pipeline is used for providing carrier air for the plasma generator.
6. The system of claim 5, wherein the plasma ignition device further comprises a line pressure detection device mounted on the air inlet line, the line pressure detection device being configured to detect a pressure value of the air inlet line.
7. The system of claim 6, wherein the plasma ignition device further comprises an air volume adjustment door connected to the air inlet line for controlling an opening of the air volume adjustment door in response to the pressure value being less than a second threshold value.
8. The system of claim 1, wherein the plasma ignition device further comprises a plasma fire detection probe mounted above the plasma burner, the plasma fire detection probe for detecting a flame condition of the pulverized coal during combustion to adjust the power of the plasma generator based on the flame condition.
9. A plasma ignition control method applied to the plasma ignition control system according to any one of claims 1 to 8, comprising:
acquiring combustion data;
controlling a plasma generator according to the combustion data.
10. The method of claim 9, wherein said controlling a plasma generator based on said combustion data comprises:
initiating operation of the plasma generator in response to the combustion data being less than a first threshold.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211405470.7A CN115585478A (en) | 2022-11-10 | 2022-11-10 | Plasma ignition control system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211405470.7A CN115585478A (en) | 2022-11-10 | 2022-11-10 | Plasma ignition control system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116293786A (en) * | 2023-04-17 | 2023-06-23 | 鑫泓淼机械科技(山东)有限公司 | Contact type efficient electric energy converter |
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- 2022-11-10 CN CN202211405470.7A patent/CN115585478A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116293786A (en) * | 2023-04-17 | 2023-06-23 | 鑫泓淼机械科技(山东)有限公司 | Contact type efficient electric energy converter |
| CN116293786B (en) * | 2023-04-17 | 2024-03-08 | 鑫泓淼机械科技(山东)有限公司 | Contact type efficient electric energy converter |
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