CN110686273A - Multi-gun boiler control system - Google Patents
Multi-gun boiler control system Download PDFInfo
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- CN110686273A CN110686273A CN201910992571.0A CN201910992571A CN110686273A CN 110686273 A CN110686273 A CN 110686273A CN 201910992571 A CN201910992571 A CN 201910992571A CN 110686273 A CN110686273 A CN 110686273A
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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
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Abstract
The invention relates to a multi-gun boiler control system, which comprises a single chip microcomputer, a power supply unit, a signal acquisition unit, an instruction sending unit, a path number selection unit, a multi-path part control unit, a multi-path signal detection unit and a multi-path signal output unit, wherein the power supply unit, the signal acquisition unit, the instruction sending unit, the path number selection unit, the multi-path part control unit, the multi-path signal detection unit; every part control unit all is connected with ignition transformer, ignition valve, fan and governing valve all way, and every way signal detection unit all includes valves detection module, flame detection module, atmospheric pressure detection module and wind pressure detection module, the singlechip sends unit and way number selection unit according to the instruction, and control signal acquisition unit and multichannel signal detection unit gather respectively and detect the parameter of corresponding way number, according to gathering and testing result, control the operating condition of part in the corresponding way number to output corresponding signal. This patent realizes the control to many combustors through one set of control system, does not need extra wiring, has saved investment and fault rate.
Description
Technical Field
The invention relates to the technical field of boiler control, in particular to a boiler control system with multi-gun combustion.
Background
Along with the increasing application of gas-fired boilers, particularly the increasing tonnage, the flow of a single valve bank and the safety of premixed combustion cannot meet the requirements, a plurality of sets of valve banks and a plurality of combustors need to be matched to meet the load requirements of the boilers, however, in the existing boiler control system with a plurality of combustors, one (one gun) combustor needs to be matched with one set of valve bank and one set of control system, the control system realizes the state control of the components, the detection of the parameters and the judgment of the faults, if N combustors exist, the whole boiler needs to be matched with N sets of control systems and 1 master controller, each control system is connected with the master controller, the wiring is complex, and the control systems are not connected with each other, when one set of control system is abnormal, the master controller can not stop other combustors in time, and other combustors still work, so that certain potential safety hazards are realized.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a multi-gun boiler control system, which realizes the control of a plurality of combustors through one set of control system without additional wiring, saves the investment and the failure rate, and ensures safer boiler control.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a multi-gun boiler control system is characterized in that a boiler comprises a plurality of parallel-connected combustors, and the combustors comprise a single chip microcomputer, and a power supply unit, a signal acquisition unit, an instruction sending unit, a path number selection unit, a multi-path component control unit, a multi-path signal detection unit and a multi-path signal output unit which are connected with the single chip microcomputer; each combustor corresponds to one path of component control unit, one path of signal detection unit and one path of signal output unit; each path of component control unit is connected with an ignition transformer, an ignition valve, a fan and a regulating valve, each path of signal detection unit comprises a valve group detection module, a flame detection module, an air pressure detection module and an air pressure detection module, and each path of signal output unit comprises switching value output and analog signal output;
the single chip microcomputer controls the signal acquisition unit and the multi-path signal detection unit to respectively acquire and detect parameters of corresponding paths according to the instruction sending unit and the path number selection unit, controls the working states of the ignition transformer, the ignition valve, the fan and the regulating valve in the corresponding paths according to the acquisition and detection results, and outputs corresponding signals.
As one of the preferable schemes of the invention, the boiler further comprises a fault judgment unit, the fault judgment unit is connected with the signal acquisition unit and the multi-path signal detection unit, and the single chip microcomputer controls whether the whole boiler is shut down and gives an alarm according to the judgment result of the fault judgment unit.
As one of the preferable schemes of the present invention, the fault determination unit is connected to the valve group detection module, the flame detection module, the air pressure detection module and the air pressure detection module in each path of signal detection unit; and when the judgment result is that one of the valve banks, the flame condition and the air pressure or the air pressure are abnormal, the single chip microcomputer controls the whole boiler to stop and give an alarm.
As one of the preferable schemes of the invention, the number of the roads is automatically or manually matched with the corresponding number of the roads according to the tonnage, and the number of the roads is an integer from 2 to 16.
As one of the preferable schemes of the invention, the boiler comprises N parallel combustors, N is an integer of 2-16, correspondingly, the multi-gun boiler control system comprises N paths of component control units, N paths of signal detection units and N paths of signal output units.
As one of the preferable schemes of the invention, the number of the ignition transformer, the number of the ignition valve, the number of the regulating valve, the number of the valve group detection modules, the number of the air pressure detection modules and the number of the air pressure detection modules are all N; the fan is 1, the flame detection module is N +2, and wherein 2 flame detection modules are used for detecting the pilot fire.
In a preferred embodiment of the present invention, the multiplex unit control unit performs ignition in a plurality of zones in order of the number of the channels.
As one of the preferable schemes of the invention, the ignition control system further comprises an ignition feedback circuit, wherein the ignition feedback circuit feeds back the current ignition condition of the ignition valve to the singlechip; and the single chip microcomputer controls the opening of the next ignition valve or the stopping of the whole boiler according to the ignition condition and gives an alarm.
As one of the preferable schemes of the invention, the signal acquisition unit comprises a switching signal, a switching value input isolation circuit, an analog signal and universal signal input acquisition processing gating and isolation circuit, and the instruction sending unit comprises a desktop computer or an intelligent mobile terminal and a communication connection device.
As one of the preferable schemes of the invention, the singlechip selects 32 bits
An M4 kernel microcontroller.
Compared with the prior art, the invention has the following beneficial effects:
(1) each path of component control unit, the signal detection unit and the signal output unit are directly connected with the single chip microcomputer, the single chip microcomputer is used for sending out the unit and the path number selection unit according to the instruction, controlling the signal acquisition unit and the multi-path signal detection unit to respectively acquire and detect parameters of corresponding paths, controlling the states of the ignition transformer, the ignition valve, the fan and the regulating valve in the corresponding paths according to the acquisition and detection results, and outputting corresponding signals. Therefore, the operation process of the whole boiler can be controlled through the single chip microcomputer, and compared with a traditional control system, the boiler is safer and the route connection is simpler.
(2) The ignition is carried out in a subarea mode according to the path number sequence, an ignition feedback circuit is arranged, and the ignition condition of the current ignition valve is fed back to the single chip microcomputer; if the ignition is successful, the singlechip controls the next ignition valve to be opened according to the ignition condition; if the ignition is unsuccessful, the single chip microcomputer controls the whole boiler to stop and give an alarm, and the back purging is carried out. Thereby further improving the safety performance of the boiler control system.
Drawings
FIG. 1 is a schematic view of the control system of a multi-lance boiler
FIG. 2 is a flow chart of a multi-lance boiler control system.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto:
as shown in figure 1, the multi-lance boiler control system is suitable for boilers comprising a plurality of parallel combustors, 2-16 combustors are preferred in the embodiment, and the specific path number can be manually or automatically set in a path number selection unit to match the tonnage. Correspondingly, the multi-gun boiler control system comprises a 2-16-path component control unit, a 2-16-path signal detection unit and a 2-16-path signal output unit.
2-16 ignition transformers, ignition valves, regulating valves, valve group detection modules, air pressure detection modules and air pressure detection modules are arranged; the number of the fans is 1 or 2-16, the number of the fans is preferably 1 in the embodiment, the number of the flame detection modules is 2-16+2, and 2 flame detection modules are used for detecting pilot fire.
The multi-gun boiler control system comprises a single chip microcomputer, a power supply unit, a signal acquisition unit, an instruction sending unit, a path number selection unit, a multi-path part control unit, a multi-path signal detection unit and a multi-path signal output unit; each combustor corresponds to one path of component control unit, one path of signal detection unit and one path of signal output unit.
Each path of component control unit is connected with an ignition transformer, an ignition valve, a fan and a regulating valve through a corresponding circuit, each path of signal detection unit comprises a valve group detection module, a flame detection module, an air pressure detection module and an air pressure detection module, and each path of signal output unit comprises switching value output and analog signal output.
The signal acquisition unit comprises a switching signal, a switching value input isolation circuit, an analog signal and universal signal input acquisition processing gating and isolation circuit, and the instruction sending unit comprises a desktop computer or an intelligent mobile terminal and communication equipment such as RS485& USB & Bluetooth & WIFI & CAN. The power supply unit comprises a switching power supply and a power supply input circuit.
This patent among the control system, each way part control unit, signal detection unit and signal output unit are all directly connected with the singlechip, and the singlechip sends unit and way number selection unit according to the instruction, and control signal acquisition unit and multichannel signal detection unit gather respectively and detect the parameter of corresponding way number, according to gathering and testing result, controls the state of ignition transformer, ignition valve, fan and governing valve in the corresponding way number to output corresponding signal. Therefore, the operation process of the whole boiler can be controlled through the single chip microcomputer, and compared with a traditional control system, the boiler is safer and the route connection is simpler.
In this exampleThe single chip microcomputer can adopt
Microcontroller of kernel, preferably 32 bits in this embodiment
An M4 kernel microcontroller to implement the above functions.
The control system also comprises a fault judgment unit, wherein the fault judgment unit is connected with the signal acquisition unit and the multi-path signal detection unit, and the single chip microcomputer controls whether the whole boiler is shut down and gives an alarm according to the judgment result of the fault judgment unit.
In this embodiment, the fault determination unit is connected to the valve group detection module, the flame detection module, the air pressure detection module and the air pressure detection module in each path of signal detection unit; and when the judgment result shows that the valve group, the flame condition, the air pressure or the air pressure of one path are abnormal, the single chip controls the whole boiler to stop and give an alarm, and the back purging is carried out. Namely, as long as one of the parameters is abnormal, the boiler is stopped and gives an alarm, thereby ensuring the safe operation of the whole boiler.
In the control process of the multi-lance boiler, if ignition is carried out simultaneously, certain potential safety hazards exist, the multi-lance boiler is ignited in a way of dividing according to the way number sequence, for example, more than 3 ways are selected, and preferably, ignition is started from the area where the middle way is located, and ignition is sequentially carried out from left to right. Before the next path is ignited, the flame in the area of the previous path needs to be detected, otherwise, the next path is not ignited. Therefore, in the present embodiment, an ignition feedback circuit is further provided in the control system, and the ignition feedback circuit feeds back the current ignition condition of the ignition valve to the single chip microcomputer; if the ignition is successful, the singlechip controls the next ignition valve to be opened according to the ignition condition; if the ignition is unsuccessful, the single chip microcomputer controls the whole boiler to stop and give an alarm, and the back purging is carried out.
As shown in FIG. 2, the control flow of the multi-lance boiler control system of the present invention is as follows:
the power supply unit is used for electrifying and initializing the whole boiler, manually inputting corresponding paths and corresponding instructions, and the single chip microcomputer controls the information acquisition unit to read data;
the fault judging unit compares the switching signal and the analog signal lamp to judge whether the signal lamp is abnormal or not; if the abnormal condition exists, the machine is stopped to alarm and overhaul, if the abnormal condition does not exist, the number of the selected paths is judged,
the multi-path signal detection unit detects whether the valve group is disconnected or not, the flame module state, the valve group leakage, the air pressure and the like, and transmits the signals to the fault judgment unit;
if any one is abnormal, stopping the boiler to alarm;
if no abnormity exists, the fans of corresponding paths are opened for front purging, the zone 1 enters an ignition state, the V1 valve is opened, the ignition transformer and the ignition valve are opened for ignition,
the ignition feedback circuit detects the ignition valve area, if the ignition is unsuccessful within 3 times, the alarm is given out, the machine is stopped, the post-purging is carried out, and if the ignition is successful within 3 times, the V2 valve is continuously opened;
and 2, the V1 valve is opened, the ignition transformer and the ignition valve are both opened for ignition, the ignition feedback circuit continues to detect the flame in the area, if the ignition is successful, the ignition of the next area is continued,
and by analogy, the ignition of all paths is completed, the single chip microcomputer adds and subtracts the loads of all paths according to the multi-path signal output unit, and the frequency of an air valve, a fan and the like are adjusted so as to complete the control process of the boiler.
While the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that variations may be made in the embodiments without departing from the spirit of the invention, and such variations are to be considered within the scope of the invention.
Claims (10)
1. The utility model provides a many guns boiler control system, the boiler includes many parallelly connected combustors which characterized in that:
the system comprises a singlechip, and a power supply unit, a signal acquisition unit, an instruction sending unit, a path number selection unit, a multi-path component control unit, a multi-path signal detection unit and a multi-path signal output unit which are connected with the singlechip;
each combustor corresponds to one path of component control unit, one path of signal detection unit and one path of signal output unit; each path of component control unit is connected with an ignition transformer, an ignition valve, a fan and a regulating valve, each path of signal detection unit comprises a valve group detection module, a flame detection module, an air pressure detection module and an air pressure detection module, and each path of signal output unit comprises switching value output and analog signal output;
the single chip microcomputer controls the signal acquisition unit and the multi-path signal detection unit to respectively acquire and detect parameters of corresponding paths according to the instruction sending unit and the path number selection unit, controls the working states of the ignition transformer, the ignition valve, the fan and the regulating valve in the corresponding paths according to the acquisition and detection results, and outputs corresponding signals.
2. The multi-lance boiler control system of claim 1 wherein:
the single-chip microcomputer controls whether the whole boiler is shut down and gives an alarm according to the judgment result of the fault judgment unit.
3. The multi-lance boiler control system of claim 2, wherein:
the fault judgment unit is connected with the valve group detection module, the flame detection module, the air pressure detection module and the air pressure detection module in each path of signal detection unit;
and when the judgment result is that one of the valve banks, the flame condition and the air pressure or the air pressure are abnormal, the single chip microcomputer controls the whole boiler to stop and give an alarm.
4. The multi-lance boiler control system of claim 3 wherein:
the number of roads selecting unit automatically or manually matches the corresponding number of roads according to the tonnage, and the number of roads is an integer from 2 to 16.
5. The multi-lance boiler control system of claim 4, wherein:
the boiler comprises N parallel-connected combustors, N is an integer from 2 to 16, and correspondingly, the multi-gun boiler control system comprises N parts control units, N signal detection units and N signal output units.
6. The multi-lance boiler control system of claim 5, wherein:
the ignition transformer, the ignition valve, the regulating valve, the valve group detection module, the air pressure detection module and the air pressure detection module are all N; the fan is 1, the flame detection module is N +2, and wherein 2 flame detection modules are used for detecting the pilot fire.
7. The multi-lance boiler control system of claim 6 wherein:
the multi-path component control unit performs ignition in a partition mode according to the path number sequence.
8. The multi-lance boiler control system of claim 7 wherein:
the ignition feedback circuit feeds back the current ignition condition of the ignition valve to the single chip microcomputer; and the single chip microcomputer controls the opening of the next ignition valve or the stopping of the whole boiler according to the ignition condition and gives an alarm.
9. The multi-lance boiler control system of claim 1 wherein:
the signal acquisition unit comprises a switching signal, a switching value input isolation circuit, an analog signal and universal signal input acquisition processing gating and isolation circuit, and the instruction sending unit comprises a desktop computer or an intelligent mobile terminal and communication connection equipment.
10. The multi-lance boiler control system of any one of claims 1-9, wherein:
the singlechip selects 32 bits
An M4 kernel microcontroller.
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| CN201910992571.0A CN110686273A (en) | 2019-10-18 | 2019-10-18 | Multi-gun boiler control system |
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| CN201910992571.0A CN110686273A (en) | 2019-10-18 | 2019-10-18 | Multi-gun boiler control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696706A (en) * | 2020-12-25 | 2021-04-23 | 中国航天空气动力技术研究院 | Control system and control method based on multiple groups of parallel heat accumulating type combustion heaters |
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