CN115405911A - Hearth explosion-proof control system and method and boiler - Google Patents
Hearth explosion-proof control system and method and boiler Download PDFInfo
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- CN115405911A CN115405911A CN202211054327.8A CN202211054327A CN115405911A CN 115405911 A CN115405911 A CN 115405911A CN 202211054327 A CN202211054327 A CN 202211054327A CN 115405911 A CN115405911 A CN 115405911A
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- hearth
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M11/00—Safety arrangements
- F23M11/04—Means for supervising combustion, e.g. windows
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Abstract
The invention discloses a hearth explosion-proof control system, a control method and a boiler, wherein the hearth explosion-proof control system comprises: the combustible gas detection unit is used for converting the concentration of the combustible gas into a combustible gas electric signal; the oxygen detection unit is used for converting the oxygen concentration into an oxygen electric signal; the pressure transmitter is used for converting the pressure value of the flue gas into a pressure electric signal; and the combustor control system is used for judging the three electric signals and making corresponding control modes for the conditions of the combustor and the hearth. By adopting the hearth explosion-proof control system, the failure probability of the traditional hearth explosion-proof protection is obviously reduced, the reliability of the traditional hearth explosion-proof control device is obviously improved, and the safety of a boiler is obviously improved.
Description
Technical Field
The invention relates to the field of boiler furnace explosion prevention, in particular to a furnace explosion prevention control system, a control method and a boiler.
Background
The explosion accidents of the hearth and the flue of the gas boiler at home and abroad frequently occur, and the explosion reasons comprise: firstly, before the boiler is ignited, gas leaks into a hearth due to the reasons of untight valve, misoperation, incapability of ignition at one time and the like, and the hearth and a flue are not swept or the sweeping time is insufficient and the air volume is insufficient, so that explosion is caused during ignition; secondly, due to the fact that the gas pressure or wind pressure fluctuation in front of the combustor is too large to cause fire escaping or backfire, the boiler is flameout during operation, and explosion occurs during operation; thirdly, when the boiler is in poor combustion, the combustible gas enters the rear flue of the boiler and is mixed with air leaked from the rear flue to form explosive gas, and secondary combustion or explosion is caused under the action of high temperature.
The current explosion-proof control measures of the hearth mainly comprise the following steps: the boiler is provided with an explosion door, so that the anti-explosion and pressure-relief capacity of a boiler furnace is improved; purging a hearth before ignition of the boiler to reduce the concentration of combustible gas in the hearth; the fuel supply is automatically cut off when the boiler is abnormally flamed out, so that the explosion condition is prevented from being formed, and the explosion-proof effect is achieved. In the combustion process, the traditional hearth explosion-proof protection device has the problems that a burner has a large number of fire detectors, the hearth purging is easy to cause problems, and the hearth purging still has the problems that combustible gas leaks and combustion can cause hearth pressure fluctuation and the like after the hearth purging, so that the hearth is very easy to be unstable, further explosion is caused, and the requirements on the operating environment and the quality of personnel are extremely high.
Disclosure of Invention
The present invention is directed to solving, at least in part, one of the technical problems in the related art. Therefore, the invention aims to provide a hearth explosion-proof control system. The invention adopts the gas detection unit and the pressure transmitter to monitor the combustion condition in the hearth in real time, and then judges the real-time monitoring result through the burner control system and makes corresponding control, thereby obviously reducing the failure probability of the explosion protection of the traditional hearth, obviously improving the reliability of the explosion protection control device of the traditional hearth and further obviously improving the safety of the boiler.
In one aspect of the invention, the invention provides a furnace explosion-proof control system. According to the embodiment of the invention, the hearth explosion-proof control system comprises:
the combustible gas detection unit is connected with the hearth and is used for converting the concentration of combustible gas in the flue gas in the hearth into a combustible gas electric signal;
the oxygen detection unit is connected with the hearth and is used for converting the oxygen concentration in the flue gas in the hearth into an oxygen electric signal;
the pressure transmitter is connected with the hearth and is used for converting the pressure value of the flue gas in the hearth into a pressure electric signal;
the combustor control system, combustor control system respectively with combustible gas detecting element oxygen detecting element pressure transmitter, combustor and furnace link to each other, combustor control system is used for receiving the combustible gas signal of electricity oxygen signal of electricity with the pressure signal of electricity, with the basis the combustible gas signal of electricity pressure signal of electricity with the oxygen signal of electricity is right the combustor with the furnace situation is judged and is made corresponding control mode.
According to the hearth explosion-proof control system provided by the embodiment of the invention, the combustible gas detection unit is adopted to monitor the concentration of the combustible gas in the hearth in real time, and the oxygen detection unit is adopted to monitor the concentration of the oxygen in the hearth in real time, so that the defect that the combustible gas and the oxygen in the hearth are possibly leaked is overcome, the probability of refusing action of the whole hearth explosion-proof protection is greatly reduced, and the detection means can play a greater role particularly in the running process of a boiler; the pressure transmitter is adopted to monitor the pressure value of the flue gas in the hearth in real time, so that the detection capability of the traditional hearth is improved, the major explosion accidents of the hearth caused by the conditions of pressure fluctuation, tempering and the like in the combustion process of the hearth are avoided, and the detection means can play a greater role particularly in the operation process of the boiler; the gas detection unit and the pressure transmitter are adopted to monitor the combustion condition in the hearth in real time, and then the burner control system is used for judging a real-time monitoring result and making corresponding control.
In addition, the hearth explosion-proof control system according to the above embodiment of the invention may also have the following additional technical features:
in some embodiments of the invention, the combustible gas is selected from at least one of methane, carbon monoxide and hydrogen.
In some embodiments of the present invention, the combustible gas detection unit is a combustible gas detector.
In some embodiments of the present invention, the oxygen detection unit is an oxygen detector.
In some embodiments of the present invention, the number of the combustible gas detectors is provided in a plurality of sets.
In some embodiments of the present invention, the number of oxygen detectors is provided in a plurality of sets.
In some embodiments of the present invention, the number of pressure transmitters is arranged in a plurality of groups.
In some embodiments of the present invention, the burner control system is electrically connected to the combustible gas detection unit, the oxygen detection unit, the pressure transmitter, the burner and the furnace respectively.
In some embodiments of the present invention, the transmission mode of the electrical signal includes wired transmission and wireless transmission.
In some embodiments of the invention, the wired transmission is selected from at least one of a cable transmission and a fiber optic transmission.
In some embodiments of the invention, the wireless transmission is electromagnetic wave transmission.
In still another aspect of the invention, the invention provides a hearth explosion-proof control method. According to an embodiment of the invention, the method comprises:
(1) Acquiring furnace flue gas by using a combustible gas detection unit, wherein the combustible gas detection unit converts the concentration of combustible gas in the furnace flue gas into a combustible gas electric signal;
(2) Acquiring hearth smoke by adopting an oxygen detection unit, wherein the oxygen detection unit converts the concentration of oxygen in the hearth smoke into an oxygen electric signal;
(3) Acquiring hearth smoke by using a pressure transmitter, and converting a pressure value of the hearth smoke into a pressure electric signal by using the pressure transmitter;
(4) And the combustor control system judges the conditions of the combustor and the hearth according to the combustible gas electric signal, the oxygen electric signal and the pressure electric signal and makes a corresponding control mode.
According to the hearth explosion-proof control method provided by the embodiment of the invention, the concentration of the combustible gas in the hearth smoke is converted into the electric signal of the combustible gas by adopting the combustible gas detection unit, the concentration of the oxygen in the hearth smoke is converted into the electric signal of the oxygen by adopting the oxygen detection unit, and the pressure value of the hearth smoke is converted into the electric signal of the pressure by adopting the pressure transmitter, so that the real-time monitoring on the concentration, the concentration and the pressure of the combustible gas in the hearth smoke is realized, the possible leakage defect of the combustible gas and the oxygen in the hearth and the defect of insufficient detection capability of the traditional hearth pressure are overcome, and the major explosion accidents of the hearth caused by the leakage, pressure fluctuation, tempering and other conditions of the combustible gas and the oxygen in the combustion process of the hearth are avoided. The real-time monitoring result is judged and corresponding control is carried out through the burner control system, the detection device is simple in structure, the signal detection precision is high, and the judgment process is quick and accurate, so that the rejection probability of the explosion-proof protection of the hearth is obviously reduced, the reliability of the traditional hearth explosion-proof control device is obviously improved, and the safety of a boiler is obviously improved.
In addition, the method according to the above embodiment of the present invention may further have the following technical solutions:
in some embodiments of the present invention, the combustible gas detection unit is a combustible gas detector.
In some embodiments of the present invention, the oxygen detection unit is an oxygen detector.
In some embodiments of the present invention, the number of the combustible gas detectors is provided in a plurality of sets.
In some embodiments of the present invention, the number of oxygen detectors is provided in a plurality of sets.
In some embodiments of the present invention, the number of pressure transmitters is arranged in a plurality of groups.
In some embodiments of the present invention, the specific method for the burner control system to judge the conditions of the burner and the furnace chamber according to the electric signals of the combustible gas, the electric signals of the oxygen and the electric signals of the pressure and make a corresponding control mode comprises the following steps:
(4-1) before the ignition of the hearth, presetting an electric signal Q corresponding to the safety value of the oxygen concentration 1on Let the electric signal corresponding to the oxygen concentration at any time point be Q 1 The electric signal corresponding to the safety value of the concentration of the combustible gas is set to be Q 2on Setting the electric signal corresponding to the combustible gas concentration corresponding to any time point as Q 2 When Q is 1on >Q 1 And Q 2on <Q 2 If so, the burner control system controls the burner to enter an ignition mode, otherwise, the burner enters a protection mode;
(4-2) in the running of the hearth, presetting an electric signal Q corresponding to a pressure fluctuation safety value of the hearth in a delta t time period 3on Setting the actual pressure fluctuation value in the delta t time period as Y, wherein Y is the difference value between the maximum pressure value and the minimum pressure value in the delta t time period, and when Y is the difference value between the maximum pressure value and the minimum pressure value in the delta t time period>Q 3on When the value is positive, the burner control system controls the burner to cut off a combustion gas valve, and the burner control system controls the hearth to enter a purging mode; when Y is<Q 3on When the value is positive, the hearth continues to operate;
(4-3) after the hearth purging in the step (4-2) is completed, the burner control system judges the electric signal of the combustible gas and the electric signal of the oxygen in the hearth again, and when Q is reached 1on >Q 1 And Q 2on <Q 2 When the furnace hearth enters the furnace stopping mode, the burner control system controls the furnace hearth to enter the furnace stopping mode; otherwise, the burner control system controls the hearth to enter a purging mode.
In a third aspect of the invention, a boiler is presented. According to the embodiment of the invention, the boiler is provided with the hearth explosion-proof control system. Therefore, the boiler has all the advantages of the hearth explosion-proof control system, and the description is omitted.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view of a furnace explosion-proof control system according to an embodiment of the present invention.
Reference numerals:
100-furnace, 101-pipeline, 102-combustible gas detection unit, 103-oxygen detection unit, 104-pressure transmitter, 105-optical cable, 106-burner control system, 107-burner.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In one aspect of the invention, the invention provides a furnace explosion-proof control system. According to an embodiment of the present invention, referring to fig. 1, a furnace explosion-proof control system includes: the combustible gas detection unit 102 is connected with the hearth 100, and the combustible gas detection unit 102 is used for converting the concentration of the combustible gas in the flue gas in the hearth 100 into a combustible gas electric signal; the oxygen detection unit 103 is connected with the hearth 100, and the oxygen detection unit 103 is used for converting the oxygen concentration in the flue gas in the hearth 100 into an oxygen electric signal; the pressure transmitter 104, the pressure transmitter 104 is connected to the furnace 100, and the pressure transmitter 104 is configured to convert a pressure value in the flue gas in the furnace 100 into a pressure electrical signal; a burner control system 106, wherein the burner control system 106 is respectively connected to the combustible gas detecting unit 102, the oxygen detecting unit 103, the pressure transmitter 104, the burner 107 and the furnace 100, and the burner control system 106 is configured to receive the combustible gas electric signal, the oxygen electric signal and the pressure electric signal, so as to determine the conditions of the burner 107 and the furnace 100 according to the combustible gas electric signal, the oxygen electric signal and the pressure electric signal and make a corresponding control mode.
In some embodiments of the present invention, the combustible gas detection unit 102 can be connected to the furnace 100 through a duct 101. Similarly, the oxygen detecting unit 103 can be connected to the furnace 100 through a pipe 101, and the pressure transmitter 104 can also be connected to the furnace 100 through a pipe 101.
In still other embodiments of the present invention, the combustible gas detection unit 102 may be connected to a burner control system 106 via an optical cable 105. Similarly, the oxygen detecting unit 103 may be connected to the burner control system 106 via an optical cable 105, the pressure transmitter 104 may be connected to the burner control system 106 via an optical cable 105, the burner 107 may be connected to the burner control system 106 via an optical cable 105, and the furnace chamber 100 may be connected to the burner control system 106 via an optical cable 105.
In some further embodiments of the present invention, the specific type of the combustible gas is not particularly limited, and as some specific examples, the combustible gas is selected from at least one of methane, carbon monoxide and hydrogen, and the methane, carbon monoxide and hydrogen belong to the most predominant combustible gas in the combustion process of the boiler, and the monitoring of the concentrations of the methane, carbon monoxide and hydrogen is beneficial to more accurately and effectively detect the concentration of the combustible gas in the furnace.
In still other embodiments of the present invention, the combustible gas detection unit is a combustible gas detector, and the combustible gas detector can detect the concentration of a plurality of combustible gases singly or simultaneously, and by detecting the concentrations of the plurality of combustible gases, the accuracy of detecting the concentration of the combustible gas is improved, so that the defect that the combustible gas in the furnace chamber may leak is more effectively overcome. It should be noted that the specific structure of the above combustible gas detector belongs to the prior art in the field, and is not described herein again.
In still other embodiments of the present invention, the oxygen detecting unit is an oxygen detector, and the oxygen detector sensor employs an electrochemical sensor, and is sensitive to reaction, and is suitable for continuously detecting the percentage concentration of oxygen in the ambient air of the industrial and mining enterprises. It should be noted that the specific structure of the oxygen detector belongs to the prior art in the field, and is not described herein again.
According to still other embodiments of the invention, the number of the combustible gas detectors is set to be multiple groups, and the concentration detection of the combustible gas in the furnace flue gas can be more accurate and effective by setting the multiple groups of the combustible gas detectors.
According to still other embodiments of the invention, the number of the oxygen detectors is set to be multiple groups, and the oxygen concentration detection of the furnace flue gas can be more accurate and effective by setting the multiple groups of oxygen detectors.
According to still other embodiments of the present invention, the number of the pressure transmitters is set to be multiple groups, and the pressure detection of the furnace flue gas can be more accurate and effective by setting the multiple groups of pressure transmitters. It should be noted that the specific structure of the pressure transmitter described above belongs to the prior art in the field, and is not described herein again.
According to further embodiments of the present invention, the burner control system 106 is electrically connected to the combustible gas detection unit 102, the oxygen detection unit 103, the pressure transmitter 104, the burner 107 and the furnace 100 respectively, and the electrical signal connection is simpler and more effective than the conventional connection and the connection safety is greatly increased.
According to still other embodiments of the present invention, the transmission manner of the electrical signal includes at least one of wired transmission and wireless transmission, the wired transmission is at least one of cable transmission and optical fiber transmission, and the wireless transmission is electromagnetic wave transmission.
According to still other embodiments of the present invention, the control modes include an ignition mode, a protection mode, a blowing-out mode and a purging mode. Before the hearth is ignited, a combustible gas detection unit is adopted to detect the concentration of combustible gas in the flue gas of the hearth, an oxygen detection unit is adopted to detect the concentration of oxygen in the flue gas of the hearth, the concentration information of the combustible gas and the concentration information of the oxygen are transmitted to a burner control system, the burner control system is adopted to compare the concentration detection information of the combustible gas with a preset combustible gas concentration safety value and compare the concentration detection information of the oxygen with the preset oxygen concentration safety value, if the detection is qualified, a burner control device controls the burner to enter an ignition mode, otherwise, the burner enters a protection mode; in the operation of a hearth, a pressure transmitter is adopted to detect the pressure of the flue gas of the hearth, the pressure detection information is transmitted to a burner control system, the burner control system is adopted to compare the pressure detection information with a preset pressure detection safety value, if the detection is qualified, the hearth continues to operate, otherwise, the burner control system controls a burner to cut off a combustion gas valve, and the burner control system controls the hearth to enter a purging mode; after the purging mode is completed, the combustible gas detection unit is adopted to detect the concentration of the combustible gas in the smoke of the hearth again, meanwhile, the oxygen detection unit is adopted to detect the concentration of the oxygen in the smoke of the hearth, the combustible gas concentration information and the oxygen concentration information are transmitted to the burner control system, the burner control system is adopted to compare the combustible gas concentration detection information with a preset combustible gas concentration safety value and compare the oxygen concentration detection information with a preset oxygen concentration safety value, if the detection is qualified, the burner control system controls the hearth to enter a furnace shutdown mode, and otherwise, the burner control system controls the hearth to enter the purging mode.
Therefore, the invention adopts the combustible gas detection unit to monitor the concentration of the combustible gas in the hearth in real time and adopts the oxygen detection unit to monitor the concentration of the oxygen in the hearth in real time, thereby making up the defect that the combustible gas and the oxygen in the hearth are likely to leak, greatly reducing the refusal probability of the explosion-proof protection of the whole hearth, and particularly playing a greater role in the running process of the boiler by the detection means; the pressure transmitter is adopted to monitor the pressure value of the flue gas in the hearth in real time, so that the detection capability of the traditional hearth is improved, the major explosion accidents of the hearth caused by the conditions of pressure fluctuation, tempering and the like in the combustion process of the hearth are avoided, and the detection means can play a greater role particularly in the operation process of the boiler; the gas detection unit and the pressure transmitter are adopted to monitor the combustion condition in the hearth in real time, the burner control system is used for judging a real-time monitoring result and making corresponding control, the detection device is simple in structure, high in signal detection precision, and quick and accurate in judgment process, so that the anti-explosion protection rejection probability of the hearth is remarkably reduced, the reliability of the traditional hearth anti-explosion control device is remarkably improved, and the safety of a boiler is remarkably improved.
In still another aspect of the present invention, the present invention provides a hearth explosion-proof control method, according to an embodiment of the present invention, the method includes:
s100: obtaining combustible gas electric signal according to combustible gas concentration
In the step, a combustible gas detection unit is adopted to obtain the hearth smoke, and the combustible gas detection unit converts the concentration of the combustible gas of the hearth smoke into a combustible gas electric signal.
S200: obtaining an oxygen electrical signal from the oxygen concentration
In the step, the hearth flue gas is obtained by adopting an oxygen detection unit, and the oxygen detection unit converts the concentration of the oxygen in the hearth flue gas into an oxygen electric signal.
S300: obtaining a pressure electrical signal from pressure
In the step, the hearth flue gas is obtained by adopting a pressure transmitter, and the pressure transmitter converts the pressure value of the hearth flue gas into a pressure electric signal.
S400: the three signals are judged by the burner control system and corresponding control modes are made
In this step, the electric signal of the combustible gas in step S100, the electric signal of the oxygen in step S200, and the electric signal of the pressure in step S300 are transmitted to a burner control system, and the burner control system determines the conditions of the burner and the furnace according to the electric signal of the combustible gas, the electric signal of the oxygen, and the electric signal of the pressure, and makes a corresponding control mode.
In some embodiments of the present invention, the specific type of the combustible gas is not particularly limited, and as some specific examples, the combustible gas is selected from at least one of methane, carbon monoxide and hydrogen, and the methane, carbon monoxide and hydrogen belong to the most dominant combustible gases in the combustion process of the boiler, and the monitoring of the concentrations of methane, carbon monoxide and hydrogen is beneficial to more accurately and effectively detect the concentration of the combustible gas in the furnace.
According to still other specific embodiments of the present invention, the combustible gas detection unit is a combustible gas detector, the combustible gas detector can detect the concentration of a plurality of combustible gases singly or simultaneously, and the detection accuracy of the concentration of the combustible gases is improved by detecting the concentrations of the plurality of combustible gases, so that the defect that the combustible gases in the furnace chamber may leak is more effectively overcome. It should be noted that the specific structure of the combustible gas detector belongs to the prior art in the field, and is not described herein again.
According to still other specific embodiments of the present invention, the oxygen detecting unit is an oxygen detector, and the oxygen detector sensor employs an electrochemical sensor, so that the oxygen detector is sensitive to reaction, and is suitable for continuously detecting the percentage concentration of oxygen in the environmental air of the industrial and mining enterprises, and when the environmental concentration is too high, an alarm signal is sent to alarm, so as to warn field personnel to evacuate the dangerous area as soon as possible. It should be noted that the specific structure of the oxygen detector belongs to the prior art in the field, and is not described herein again.
According to still other embodiments of the present invention, the number of the combustible gas detectors is set to be multiple groups, and the concentration of the combustible gas in the furnace flue gas can be detected more accurately and effectively by setting multiple groups of the combustible gas detectors.
According to still other embodiments of the invention, the number of the oxygen detectors is set to be multiple groups, and the oxygen concentration detection of the furnace flue gas can be more accurate and effective by setting the multiple groups of oxygen detectors.
According to still other embodiments of the present invention, the number of the pressure transmitters is set to be multiple groups, and the pressure detection of the furnace flue gas can be more accurate and effective by setting the multiple groups of pressure transmitters. It should be noted that the specific structure of the pressure transmitter described above belongs to the prior art in the field, and is not described herein again.
According to still other embodiments of the present invention, the specific method for the burner control system to determine the conditions of the burner and the furnace according to the electric signals of the combustible gas, the electric signals of the oxygen and the electric signals of the pressure and to make a corresponding control mode comprises:
s401: before the ignition of the hearth, presetting an electric signal Q corresponding to the safety value of the oxygen concentration 1on Let the electric signal corresponding to the oxygen concentration at any time point be Q 1 The preset electric signal corresponding to the safety value of the concentration of the combustible gas is Q 2on Setting the electric signal corresponding to the concentration of the combustible gas corresponding to any time point as Q 2 When Q is 1on >Q 1 And Q 2on <Q 2 If so, the burner control system controls the burner to enter an ignition mode, otherwise, the burner enters a protection mode;
s402: in the running process of a hearth, presetting an electric signal Q corresponding to a pressure fluctuation safety value of the hearth in a delta t time period 3on Setting the actual pressure fluctuation value in the delta t time period as Y, wherein Y is the difference value between the maximum pressure value and the minimum pressure value in the delta t time period, and when Y is used>Q 3on When the value is positive, the burner control system controls the burner to cut off a combustion gas valve, and the burner control system controls the hearth to enter a purging mode; when Y is<Q 3on When the value is positive, the hearth continues to operate;
s403: after the furnace chamber purging in step S402 is completed, the burner control system judges the furnace againThe electrical signal of the combustible gas and the electrical signal of the oxygen in the bore, when Q 1on >Q 1 And Q 2on <Q 2 When the furnace hearth is in the blowing-out mode, the burner control system controls the furnace hearth to enter the blowing-out mode; otherwise, the burner control system controls the hearth to enter a purging mode.
According to the hearth explosion-proof control method provided by the embodiment of the invention, the concentration of the combustible gas in the hearth smoke is converted into the electric signal of the combustible gas by adopting the combustible gas detection unit, the concentration of the oxygen in the hearth smoke is converted into the electric signal of the oxygen by adopting the oxygen detection unit, and the pressure value of the hearth smoke is converted into the electric signal of the pressure by adopting the pressure transmitter, so that the real-time monitoring on the concentration of the combustible gas, the concentration of the oxygen and the pressure of the hearth smoke is realized, the defects of possible leakage of the combustible gas and the oxygen in the hearth and insufficient detection capability of the traditional hearth pressure are overcome, and the occurrence of major hearth explosion accidents caused by the conditions of leakage of the combustible gas and the oxygen, pressure fluctuation, tempering and the like in the combustion process of the hearth is avoided. The real-time monitoring result is judged and corresponding control is made through the burner control system, the detection device is simple in structure, the signal detection precision is high, and the judgment process is quick and accurate, so that the failure probability of the explosion-proof protection of the hearth is obviously reduced, the reliability of the traditional hearth explosion-proof control device is obviously improved, and the safety of the boiler is obviously improved.
In a third aspect of the present invention, the present invention provides a boiler, wherein the boiler comprises various industrial furnaces using gas fuel burners, specifically, furnaces used in the cement, steel and glass industries, so that the boiler has the advantages of high practicability, wide application range, high market prospect, and suitability for popularization and application. According to an embodiment of the invention, the boiler is provided with the furnace explosion-proof control system in the above embodiment. Therefore, the boiler has all the advantages of the hearth explosion-proof control system, and the description is omitted.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. An explosion-proof control system of furnace, characterized in that includes:
the combustible gas detection unit is connected with the hearth and is used for converting the concentration of combustible gas in the flue gas in the hearth into a combustible gas electric signal;
the oxygen detection unit is connected with the hearth and is used for converting the oxygen concentration in the flue gas in the hearth into an oxygen electric signal;
the pressure transmitter is connected with the hearth and is used for converting the pressure value of the flue gas in the hearth into a pressure electric signal;
the combustor control system, the combustor control system respectively with combustible gas detecting element oxygen detecting element pressure transmitter, combustor and furnace link to each other, the combustor control system is used for receiving the combustible gas signal of electricity the oxygen signal of electricity with the pressure signal of electricity, with the basis the combustible gas signal of electricity the pressure signal of electricity with the oxygen signal of electricity is right the combustor with the furnace situation is judged and is made corresponding control mode.
2. The furnace explosion-proof control system of claim 1, wherein the combustible gas is selected from at least one of methane, carbon monoxide and hydrogen.
3. The hearth explosion-proof control system according to claim 1, characterized in that the combustible gas detection unit is a combustible gas detector;
optionally, the oxygen detection unit is an oxygen detector.
4. The hearth explosion-proof control system according to claim 3, characterized in that the number of the combustible gas detectors is arranged in a plurality of groups;
optionally, the number of the oxygen detectors is set to be multiple groups;
optionally, the number of pressure transmitters is arranged in a plurality of groups.
5. The hearth explosion-proof control system according to claim 1, wherein the burner control system is respectively connected with the combustible gas detection unit, the oxygen detection unit, the pressure transmitter, the burner and the hearth through electric signals.
6. The hearth explosion-proof control system according to claim 1, characterized in that the transmission modes of the electric signals comprise wired transmission and wireless transmission;
optionally, the wired transmission is selected from at least one of cable transmission and fiber optic transmission;
optionally, the wireless transmission is electromagnetic wave transmission.
7. A hearth explosion-proof control method is characterized by comprising the following steps:
(1) Acquiring furnace flue gas by adopting a combustible gas detection unit, wherein the combustible gas detection unit converts the concentration of combustible gas in the furnace flue gas into a combustible gas electric signal;
(2) Acquiring hearth smoke by using an oxygen detection unit, wherein the oxygen detection unit converts the concentration of oxygen in the hearth smoke into an electrical oxygen signal;
(3) Acquiring hearth flue gas by using a pressure transmitter, wherein the pressure transmitter converts the pressure value of the hearth flue gas into a pressure electric signal;
(4) And the combustor control system judges the conditions of the combustor and the hearth according to the combustible gas electric signal, the oxygen electric signal and the pressure electric signal and makes a corresponding control mode.
8. The hearth explosion-proof control method according to claim 7, characterized in that the combustible gas detection unit is a combustible gas detector;
optionally, the oxygen detection unit is an oxygen detector;
optionally, the number of the combustible gas detectors is set to be multiple groups;
optionally, the number of the oxygen detectors is set to be multiple groups;
optionally, the number of pressure transmitters is arranged in a plurality of groups.
9. The hearth explosion-proof control method according to claim 7, wherein the specific method for the burner control system to judge the conditions of the burner and the hearth according to the electric signals of the combustible gas, the electric signals of the oxygen and the electric signals of the pressure and make a corresponding control mode comprises the following steps:
(4-1) before the ignition of the hearth, presetting an electric signal Q corresponding to the safety value of the oxygen concentration 1on Let the electric signal corresponding to the oxygen concentration at any time point be Q 1 The preset electric signal corresponding to the safety value of the concentration of the combustible gas is Q 2on Setting the electric signal corresponding to the concentration of the combustible gas corresponding to any time point as Q 2 When Q is 1on >Q 1 And Q 2on <Q 2 When the ignition is started, the combustor control system controls the combustor to enter an ignition mode, otherwise, the combustor control system enters a protection mode;
(4-2) in the running of the hearth, presetting an electric signal Q corresponding to a pressure fluctuation safety value of the hearth in a delta t time period 3on Setting the actual pressure fluctuation value in the delta t time period as Y, wherein Y is the difference value between the maximum pressure value and the minimum pressure value in the delta t time period, and when Y is used>Q 3on When the value is positive, the burner control system controls the burner to cut off a combustion gas valve, and the burner control system controls the hearth to enter a purging mode; when Y is<Q 3on When the value is positive, the hearth continues to operate;
(4-3) after the furnace purging in the step (4-2) is completed, the burner control system judges the furnace againSaid electrical signal of combustible gas and said electrical signal of oxygen in said chamber, when Q 1on >Q 1 And Q 2on <Q 2 When the furnace hearth is in the blowing-out mode, the burner control system controls the furnace hearth to enter the blowing-out mode; otherwise, the burner control system controls the hearth to enter a purging mode.
10. A boiler, characterized in that it comprises a furnace explosion-proof control system according to any one of claims 1 to 5.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117367105A (en) * | 2023-09-22 | 2024-01-09 | 广州市赛思达机械设备有限公司 | Safety protection method, device and equipment for gas rotary furnace and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117367105A (en) * | 2023-09-22 | 2024-01-09 | 广州市赛思达机械设备有限公司 | Safety protection method, device and equipment for gas rotary furnace and storage medium |
| CN117367105B (en) * | 2023-09-22 | 2024-03-26 | 广州市赛思达机械设备有限公司 | Safety protection method, device and equipment for gas rotary furnace and storage medium |
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