CN110805888A - Boiler combustion system for producing steam - Google Patents
Boiler combustion system for producing steam Download PDFInfo
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- CN110805888A CN110805888A CN201910928372.3A CN201910928372A CN110805888A CN 110805888 A CN110805888 A CN 110805888A CN 201910928372 A CN201910928372 A CN 201910928372A CN 110805888 A CN110805888 A CN 110805888A
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- air supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention provides a boiler combustion system for producing steam, which comprises a main control system, a combustion control system and an equipment configuration system, wherein the main control system comprises a PLC (programmable logic controller) main control module and a data collection module, and the PLC main control module comprises a processor, an analog input module and an Ethernet module; the invention senses the parameters adjusted by the boiler steam load adjusting module in real time through the fuel and boiler steam load coordination module, so that the fuel quantity calculating module gives out the corresponding changed boiler combustion fuel quantity according to the requirement change of the boiler steam load, ensures that the real-time fuel is matched with the boiler steam load, maintains the normal operation of the boiler, receives the fuel quantity information in real time through the air supply and fuel adaptation module, then draws up the air supply quantity coordinated with the fuel quantity, controls the air feeder to reasonably supply air, enables the air supply quantity to be adapted with the fuel quantity, realizes economic combustion and achieves the highest thermal efficiency of the boiler.
Description
Technical Field
The invention relates to the technical field of combustion systems, in particular to a boiler combustion system for producing steam.
Background
When the boiler is used, pulverized coal is conveyed to a hearth through a powder feeder, and is fully combusted through being mixed with smoke gas to emit heat, furnace water in a water-cooled wall absorbs the heat emitted by the pulverized coal through radiation, conduction and other forms to form saturated steam, the steam is heated through a superheater to form superheated steam, and the superheated steam is supplied to an external user, and in the process, a combustion system is a core;
in the existing boiler combustion system, when the steam load requirement output by the boiler is changed, the heat provided by fuel combustion is difficult to adapt in time, the normal operation of the boiler cannot be ensured, the existing boiler combustion system is difficult to adjust the proportion of the air blowing quantity and the fuel feeding quantity, the boiler cannot be ensured to operate in the optimal combustion state, meanwhile, the existing boiler combustion system is difficult to ensure that a certain negative pressure exists in a hearth, the heat efficiency of the boiler is not stable enough, and sometimes the hearth is overheated and is sprayed outwards, so that potential safety hazards exist.
Disclosure of Invention
Aiming at the problems, the invention provides a boiler combustion system for producing steam, which senses parameters adjusted by a boiler steam load adjusting module in real time through a fuel and boiler steam load coordination module, so that a fuel quantity calculating module gives out corresponding changed boiler combustion fuel quantity according to the requirement change of the boiler steam load, the real-time fuel is matched with the boiler steam load, and the normal operation of a boiler is maintained.
In order to solve the problems, the invention provides a boiler combustion system for producing steam, which comprises a main control system, a combustion control system and an equipment configuration system, wherein the main control system comprises a PLC (programmable logic controller) main control module and a data collection module, the PLC main control module comprises a processor, an analog input module and an Ethernet module, and the processor and the analog input module are respectively connected with the combustion control system and the equipment configuration system and have the functions of terminal analysis and parameter control;
the combustion control system comprises a main steam pressure control system and a combustion rate control system, the combustion rate control system comprises a fuel control module and an air volume control module, the fuel control module comprises a fuel amount calculation module, a fuel and boiler steam load coordination module and a signal transmission module, the air volume control module comprises an air supply volume control module, an induced air volume control module, an air supply and induced air balance module and an execution module, an air supply and fuel adaptation module is arranged in the air supply volume control module, the air supply and fuel adaptation module is connected with the fuel amount calculation module, an air supply and induced air coordination module is arranged in the induced air volume control module, and the air supply and induced air coordination module is connected with the air supply volume control module;
the main steam pressure control system comprises a boiler steam load adjusting module, a hearth negative pressure identification module and a hearth flue inertia eliminating module, wherein a parameter receiving end of the boiler steam load adjusting module is connected with an analog input module, a parameter end of the boiler steam load adjusting module is connected with the fuel control module, and the hearth negative pressure identification module is connected with the air supply and induction balancing module;
the equipment configuration system includes boiler, bunker, burning point firearm, draught fan and forced draught blower, the bunker includes fuel agitator and fuel feeder, fuel feeder sends the fuel in the bunker to the boiler in, burning point firearm is igniteed in giving the boiler, air supply and induced air in the boiler are given respectively to draught fan and forced draught blower, signal emission module in the fuel control module with the fuel feeder is connected, execution module in the air flow control module is connected with forced draught blower and draught fan respectively.
The further improvement lies in that: the data collection module comprises a temperature sensing module, a pressure sensing module, a flow sensing module, an oxygen content sensing module and a boiler water level sensing module, and is connected to the equipment configuration system.
The further improvement lies in that: the main control system further comprises an alarm module, the input end of the alarm module is connected with the data collection module, the output end of the alarm module is connected with the Ethernet module, and when data in the equipment configuration system collected by the data collection module is abnormal, the alarm module transmits an alarm signal to the terminal through the Ethernet module to alarm.
The further improvement lies in that: the analog quantity input module is used for processing load parameters required by boiler steam through the processor and then inputting the load parameters to the boiler steam load adjusting module, the boiler steam load adjusting module is used for controlling the boiler to adjust the steam load in the boiler, meanwhile, the fuel and boiler steam load coordination module senses the parameters adjusted by the boiler steam load adjusting module in real time, so that the fuel quantity calculating module gives out corresponding changed boiler combustion fuel quantity according to the requirement change of the boiler steam load, and then the fuel quantity data is processed through the processor and then sent to the fuel feeder through the signal transmitting module, and therefore the fuel quantity is changed.
The further improvement lies in that: the air supply and fuel adaptation module is connected with the fuel quantity calculation module, receives fuel quantity information in real time, then plans the air supply quantity coordinated with the fuel quantity, and controls the air feeder to supply air reasonably after being processed by the processor through the execution module, so that the highest heat efficiency of the boiler is achieved.
The further improvement lies in that: the air supply and induction coordination module is connected with the air supply amount control module, receives the air supply amount in real time, then draws the air amount corresponding to the air supply amount, controls the induced draft fan to induce air after being processed by the processor through the execution module, and ensures that a certain negative pressure of the hearth is within an allowable range and within-20 Pa.
The further improvement lies in that: hearth negative pressure identification module with send the induced air balanced module to be connected, hearth negative pressure identification module transmits the negative pressure value in the boiler furnace for sending the induced air balanced module, send the induced air balanced module to utilize the air output of forced draught blower as feedforward signal, plans the induced air volume of adjusting the draught fan, controls forced draught blower and draught fan through execution module after the treater is total, balance air output and induced air volume, adjusts boiler furnace's negative pressure.
The invention has the beneficial effects that: the invention induces the parameters adjusted by the boiler steam load adjusting module in real time through the fuel and boiler steam load coordination module, thereby leading the fuel quantity calculating module to give out the corresponding changed fuel quantity of the boiler combustion according to the requirement change of the boiler steam load, ensuring the real-time fuel to be matched with the boiler steam load, maintaining the normal operation of the boiler, receiving the fuel quantity information in real time through the air supply and fuel adaptation module, then drawing the air supply quantity matched with the fuel quantity, controlling the air feeder to reasonably supply air, leading the air supply quantity to be matched with the fuel quantity, realizing economic combustion, reaching the highest heat efficiency of the boiler, simultaneously receiving the air supply quantity in real time through the air supply and air introduction coordination module, then drawing the air introduction quantity matched with the air supply quantity, controlling the induced draft fan to introduce air, leading the air quantity to be matched with the air supply quantity, ensuring the negative pressure of a hearth to be in an allowable range, and being connected with the air supply and, the air supply and induced air balance module utilizes the air supply quantity of the air supply machine as a feedforward signal, the induced air quantity of the induced draft fan is planned and adjusted, the air supply quantity and the induced air quantity are balanced, the negative pressure of the boiler hearth is adjusted, the thermal efficiency of the boiler is maintained, the hearth is prevented from being overheated and spraying fire outwards, and potential safety hazards are avoided.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Detailed Description
In order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
According to fig. 1, the embodiment provides a boiler combustion system for steam production, which includes a main control system, a combustion control system and an equipment configuration system, wherein the main control system includes a PLC main control module and a data collection module, the PLC main control module includes a processor, an analog input module and an ethernet module, and the processor and the analog input module are respectively connected to the combustion control system and the equipment configuration system, and include functions of terminal analysis and parameter control;
the combustion control system comprises a main steam pressure control system and a combustion rate control system, the combustion rate control system comprises a fuel control module and an air volume control module, the fuel control module comprises a fuel amount calculation module, a fuel and boiler steam load coordination module and a signal transmission module, the air volume control module comprises an air supply volume control module, an induced air volume control module, an air supply and induced air balance module and an execution module, an air supply and fuel adaptation module is arranged in the air supply volume control module, the air supply and fuel adaptation module is connected with the fuel amount calculation module, an air supply and induced air coordination module is arranged in the induced air volume control module, and the air supply and induced air coordination module is connected with the air supply volume control module;
the main steam pressure control system comprises a boiler steam load adjusting module, a hearth negative pressure identification module and a hearth flue inertia eliminating module, wherein a parameter receiving end of the boiler steam load adjusting module is connected with an analog input module, a parameter end of the boiler steam load adjusting module is connected with the fuel control module, and the hearth negative pressure identification module is connected with the air supply and induction balancing module;
the equipment configuration system includes boiler, bunker, burning point firearm, draught fan and forced draught blower, the bunker includes fuel agitator and fuel feeder, fuel feeder sends the fuel in the bunker to the boiler in, burning point firearm is igniteed in giving the boiler, air supply and induced air in the boiler are given respectively to draught fan and forced draught blower, signal emission module in the fuel control module with the fuel feeder is connected, execution module in the air flow control module is connected with forced draught blower and draught fan respectively.
The data collection module comprises a temperature sensing module, a pressure sensing module, a flow sensing module, an oxygen content sensing module and a boiler water level sensing module, and is connected to the equipment configuration system.
The main control system further comprises an alarm module, the input end of the alarm module is connected with the data collection module, the output end of the alarm module is connected with the Ethernet module, and when data in the equipment configuration system collected by the data collection module is abnormal, the alarm module transmits an alarm signal to the terminal through the Ethernet module to alarm.
The analog quantity input module is used for processing load parameters required by boiler steam through the processor and then inputting the load parameters to the boiler steam load adjusting module, the boiler steam load adjusting module is used for controlling the boiler to adjust the steam load in the boiler, meanwhile, the fuel and boiler steam load coordination module senses the parameters adjusted by the boiler steam load adjusting module in real time, so that the fuel quantity calculating module gives out corresponding changed boiler combustion fuel quantity according to the requirement change of the boiler steam load, and then the fuel quantity data is processed through the processor and then sent to the fuel feeder through the signal transmitting module, and therefore the fuel quantity is changed.
The air supply and fuel adaptation module is connected with the fuel quantity calculation module, receives fuel quantity information in real time, then plans the air supply quantity coordinated with the fuel quantity, and controls the air feeder to supply air reasonably after being processed by the processor through the execution module, so that the highest heat efficiency of the boiler is achieved.
The air supply and induction coordination module is connected with the air supply amount control module, receives the air supply amount in real time, then draws the air amount corresponding to the air supply amount, controls the induced draft fan to induce air after being processed by the processor through the execution module, and ensures that a certain negative pressure of the hearth is within an allowable range and within-20 Pa.
Hearth negative pressure identification module with send the induced air balanced module to be connected, hearth negative pressure identification module transmits the negative pressure value in the boiler furnace for sending the induced air balanced module, send the induced air balanced module to utilize the air output of forced draught blower as feedforward signal, plans the induced air volume of adjusting the draught fan, controls forced draught blower and draught fan through execution module after the treater is total, balance air output and induced air volume, adjusts boiler furnace's negative pressure.
The invention induces the parameters adjusted by the boiler steam load adjusting module in real time through the fuel and boiler steam load coordination module, thereby leading the fuel quantity calculating module to give out the corresponding changed fuel quantity of the boiler combustion according to the requirement change of the boiler steam load, ensuring the real-time fuel to be matched with the boiler steam load, maintaining the normal operation of the boiler, receiving the fuel quantity information in real time through the air supply and fuel adaptation module, then drawing the air supply quantity matched with the fuel quantity, controlling the air feeder to reasonably supply air, leading the air supply quantity to be matched with the fuel quantity, realizing economic combustion, reaching the highest heat efficiency of the boiler, simultaneously receiving the air supply quantity in real time through the air supply and air introduction coordination module, then drawing the air introduction quantity matched with the air supply quantity, controlling the induced draft fan to introduce air, leading the air quantity to be matched with the air supply quantity, ensuring the negative pressure of a hearth to be in an allowable range, and being connected with the air supply and, the air supply and induced air balance module utilizes the air supply quantity of the air supply machine as a feedforward signal, the induced air quantity of the induced draft fan is planned and adjusted, the air supply quantity and the induced air quantity are balanced, the negative pressure of the boiler hearth is adjusted, the thermal efficiency of the boiler is maintained, the hearth is prevented from being overheated and spraying fire outwards, and potential safety hazards are avoided.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a boiler combustion system for steam production which characterized in that: the system comprises a master control system, a combustion control system and an equipment configuration system, wherein the master control system comprises a PLC master control module and a data collection module, the PLC master control module comprises a processor, an analog input module and an Ethernet module, and the processor and the analog input module are respectively connected with the combustion control system and the equipment configuration system and have the functions of terminal analysis and parameter control;
the combustion control system comprises a main steam pressure control system and a combustion rate control system, the combustion rate control system comprises a fuel control module and an air volume control module, the fuel control module comprises a fuel amount calculation module, a fuel and boiler steam load coordination module and a signal transmission module, the air volume control module comprises an air supply volume control module, an induced air volume control module, an air supply and induced air balance module and an execution module, an air supply and fuel adaptation module is arranged in the air supply volume control module, the air supply and fuel adaptation module is connected with the fuel amount calculation module, an air supply and induced air coordination module is arranged in the induced air volume control module, and the air supply and induced air coordination module is connected with the air supply volume control module;
the main steam pressure control system comprises a boiler steam load adjusting module, a hearth negative pressure identification module and a hearth flue inertia eliminating module, wherein a parameter receiving end of the boiler steam load adjusting module is connected with an analog input module, a parameter end of the boiler steam load adjusting module is connected with the fuel control module, and the hearth negative pressure identification module is connected with the air supply and induction balancing module;
the equipment configuration system includes boiler, bunker, burning point firearm, draught fan and forced draught blower, the bunker includes fuel agitator and fuel feeder, fuel feeder sends the fuel in the bunker to the boiler in, burning point firearm is igniteed in giving the boiler, air supply and induced air in the boiler are given respectively to draught fan and forced draught blower, signal emission module in the fuel control module with the fuel feeder is connected, execution module in the air flow control module is connected with forced draught blower and draught fan respectively.
2. A boiler combustion system for producing steam as set forth in claim 1, wherein: the data collection module comprises a temperature sensing module, a pressure sensing module, a flow sensing module, an oxygen content sensing module and a boiler water level sensing module, and is connected to the equipment configuration system.
3. A boiler combustion system for producing steam as set forth in claim 1, wherein: the main control system further comprises an alarm module, the input end of the alarm module is connected with the data collection module, the output end of the alarm module is connected with the Ethernet module, and when data in the equipment configuration system collected by the data collection module is abnormal, the alarm module transmits an alarm signal to the terminal through the Ethernet module to alarm.
4. A boiler combustion system for producing steam as set forth in claim 1, wherein: the analog quantity input module is used for processing load parameters required by boiler steam through the processor and then inputting the load parameters to the boiler steam load adjusting module, the boiler steam load adjusting module is used for controlling the boiler to adjust the steam load in the boiler, meanwhile, the fuel and boiler steam load coordination module senses the parameters adjusted by the boiler steam load adjusting module in real time, so that the fuel quantity calculating module gives out corresponding changed boiler combustion fuel quantity according to the requirement change of the boiler steam load, and then the fuel quantity data is processed through the processor and then sent to the fuel feeder through the signal transmitting module, and therefore the fuel quantity is changed.
5. A boiler combustion system for producing steam as set forth in claim 1, wherein: the air supply and fuel adaptation module is connected with the fuel quantity calculation module, receives fuel quantity information in real time, then plans the air supply quantity coordinated with the fuel quantity, and controls the air feeder to supply air reasonably after being processed by the processor through the execution module, so that the highest heat efficiency of the boiler is achieved.
6. A boiler combustion system for producing steam as set forth in claim 1, wherein: the air supply and induction coordination module is connected with the air supply amount control module, receives the air supply amount in real time, then draws the air amount corresponding to the air supply amount, controls the induced draft fan to induce air after being processed by the processor through the execution module, and ensures that a certain negative pressure of the hearth is within an allowable range and within-20 Pa.
7. A boiler combustion system for producing steam as set forth in claim 5, wherein: hearth negative pressure identification module with send the induced air balanced module to be connected, hearth negative pressure identification module transmits the negative pressure value in the boiler furnace for sending the induced air balanced module, send the induced air balanced module to utilize the air output of forced draught blower as feedforward signal, plans the induced air volume of adjusting the draught fan, controls forced draught blower and draught fan through execution module after the treater is total, balance air output and induced air volume, adjusts boiler furnace's negative pressure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910928372.3A CN110805888A (en) | 2019-09-28 | 2019-09-28 | Boiler combustion system for producing steam |
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| CN201910928372.3A CN110805888A (en) | 2019-09-28 | 2019-09-28 | Boiler combustion system for producing steam |
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| CN110805888A true CN110805888A (en) | 2020-02-18 |
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| CN201910928372.3A Pending CN110805888A (en) | 2019-09-28 | 2019-09-28 | Boiler combustion system for producing steam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116447615A (en) * | 2023-06-02 | 2023-07-18 | 杭州久控科技有限公司 | Combustion monitoring method, device and equipment for natural gas boiler |
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| EP2224165A2 (en) * | 2009-02-25 | 2010-09-01 | Hitachi Ltd. | Oxyfuel combustion boiler plant and operating method for the same |
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