CN111720853B - Ignition method and system for coal chemical industry start-up heating furnace - Google Patents
Ignition method and system for coal chemical industry start-up heating furnace Download PDFInfo
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- CN111720853B CN111720853B CN202010523690.4A CN202010523690A CN111720853B CN 111720853 B CN111720853 B CN 111720853B CN 202010523690 A CN202010523690 A CN 202010523690A CN 111720853 B CN111720853 B CN 111720853B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q13/00—Igniters not otherwise provided for
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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
- F23M11/045—Means for supervising combustion, e.g. windows by observing the flame
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q21/00—Devices for effecting ignition from a remote location
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Abstract
The invention discloses a method and a system for igniting a coal chemical industry start-up heating furnace, which comprises the following steps: starting a pilot lamp fuel gas cut-off valve and a main fuel gas cut-off valve, adjusting the fuel gas inlet pressure of the pilot lamp, starting a pilot lamp electromagnetic valve of a fire detection point, and detecting whether flame exists after a fire detection point is ignited by a fire detection rod; if flame exists, the valve opening degree of a start-up path fuel gas regulating valve of the fire detection point is regulated, a start-up path fuel gas cut-off valve of the fire detection point is opened, the fire detection point is ignited successfully, and the next fire detection point is started; if no flame exists, the pilot lamp electromagnetic valve of the fire detection point is closed, the ignition rod is restarted after nitrogen purging is carried out, the ignition frequency of the fire detection point is detected, if the preset ignition frequency threshold value is exceeded, the ignition fails, and the next fire detection point is started; detecting the number of successfully ignited fire detection points, and if the number exceeds a preset successful number threshold value, successfully igniting; otherwise, the ignition fails. Automatic control is comprehensively realized, the personnel error probability is reduced, and the safety of the operation of the synthetic ammonia system is promoted.
Description
Technical Field
The invention relates to the technical field of automatic ignition control in coal chemical industry, in particular to an ignition method and an ignition system for a start-up heating furnace in coal chemical industry.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The catalyst of the synthesis unit synthesis tower of the coal chemical device needs regular switch valves in the heating process of the heating furnace, such as an ignition path fuel valve, an open path fuel, a nitrogen purging valve, a torch emptying valve and the like, the production control steps are more, and an operator manually controls the heating furnace to ignite and has various hidden dangers, so that the safety problems of mistaken switch of the valve, unsuccessful ignition, slow fuel gas valve closing, untimely opening of nitrogen purging, flash explosion space in the combustion furnace and the like can occur, thereby bringing great hidden dangers to production.
Disclosure of Invention
In order to solve the problems, the invention provides an ignition method and an ignition system for a coal chemical industry start-up heating furnace, which are suitable for ignition of a coal gasification synthesis ammonia and process ammonia synthesis start-up heating furnace, and realize a one-key automatic ignition control method.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a method for igniting a coal chemical industry start-up heating furnace, comprising the following steps:
starting a pilot lamp fuel gas cut-off valve and a main fuel gas cut-off valve, adjusting the fuel gas inlet pressure of the pilot lamp, starting a pilot lamp electromagnetic valve of a fire detection point, and detecting whether flame exists after a fire detection point is ignited by a fire detection rod;
if flame exists, the valve opening degree of a start-up path fuel gas regulating valve of the fire detection point is regulated, a start-up path fuel gas cut-off valve of the fire detection point is opened, the fire detection point is ignited successfully, and the ignition operation of the next fire detection point is started;
if no flame exists, the pilot lamp electromagnetic valve of the fire detection point is closed, the ignition rod is restarted after nitrogen purging is carried out, the ignition frequency of the fire detection point is detected, if the preset ignition frequency threshold value is exceeded, the ignition fails, and the ignition operation of the next fire detection point is carried out;
after all the fire detection points are sequentially ignited, detecting the number of successfully ignited fire, and if the number exceeds a preset successful number threshold value, successfully igniting the coal chemical industry start-up heating furnace; otherwise, the ignition fails.
In a second aspect, the present invention provides an ignition system for a coal chemical industry start-up heating furnace, comprising:
the pre-ignition module is used for opening the pilot burner fuel gas cut-off valve and the main fuel gas cut-off valve, adjusting the pilot burner fuel gas inlet pressure, opening the pilot burner electromagnetic valve of the fire detection point, and detecting whether flame exists after the ignition rod ignites the fire detection point;
the first ignition module is used for adjusting the valve opening of a start-up path fuel gas adjusting valve of the fire detection point if flame exists, opening the start-up path fuel gas stop valve of the fire detection point, successfully igniting the fire detection point and entering the ignition operation of the next fire detection point;
the second ignition module is used for closing the pilot burner electromagnetic valve of the fire detection point if no flame exists, restarting the ignition rod after nitrogen purging, detecting the ignition frequency of the fire detection point, failing to ignite if the preset ignition frequency threshold is exceeded, and entering the ignition operation of the next fire detection point;
the ignition judging module is used for detecting the number of successful ignition after all the ignition detection points are sequentially ignited, and if the number exceeds a preset successful number threshold value, the ignition of the coal chemical industry start-up heating furnace is successful; otherwise, the ignition fails.
In a third aspect, the present invention provides an electronic device comprising a memory and a processor, and computer instructions stored on the memory and executed on the processor, wherein when the computer instructions are executed by the processor, the method of the first aspect is performed.
In a fourth aspect, the present invention provides a computer readable storage medium for storing computer instructions which, when executed by a processor, perform the method of the first aspect.
Compared with the prior art, the invention has the beneficial effects that:
the invention is suitable for the ignition program of the ammonia synthesis start-up heating furnace in the coal gasification ammonia synthesis process, improves the defects of the existing ignition program, ensures that each step sequence can be normally used according to the working condition of the device in sequence control, automatically sweeps nitrogen after one-key ignition starting, automatically ignites, automatically exits due to abnormal ignition, and starts nitrogen sweeping after each ignition failure, thereby comprehensively realizing automatic control, greatly improving the automation degree and the working efficiency of the device, reducing the probability of misoperation of personnel, and promoting the safe and stable operation of a synthesis ammonia system.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a flowchart of an ignition method for a coal chemical industry start-up heating furnace according to embodiment 1 of the present invention.
The specific implementation mode is as follows:
the invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and it should be understood that the terms "comprises" and "comprising", and any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
Example 1
As shown in fig. 1, the present embodiment provides a method for igniting a coal chemical industry start-up heating furnace, including:
s1: starting a pilot lamp fuel gas cut-off valve and a main fuel gas cut-off valve, adjusting the fuel gas inlet pressure of the pilot lamp, starting a pilot lamp electromagnetic valve of a fire detection point, and detecting whether flame exists after a fire detection point is ignited by a fire detection rod;
s2: if flame exists, the valve opening degree of a start-up path fuel gas regulating valve of the fire detection point is regulated, a start-up path fuel gas cut-off valve of the fire detection point is opened, the fire detection point is ignited successfully, and the ignition operation of the next fire detection point is started;
s3: if no flame exists, the pilot lamp electromagnetic valve of the fire detection point is closed, the ignition rod is restarted after nitrogen purging is carried out, the ignition frequency of the fire detection point is detected, if the preset ignition frequency threshold value is exceeded, the ignition fails, and the ignition operation of the next fire detection point is carried out;
s4: after all the fire detection points are sequentially ignited, detecting the number of successfully ignited fire, and if the number exceeds a preset successful number threshold value, successfully igniting the coal chemical industry start-up heating furnace; otherwise, the ignition fails.
The ignition method of the embodiment realizes one-key ignition sequence control according to the process operation requirements, and a one-point ignition sequence control program for starting the heating furnace is specifically divided into 29 steps and 4 fire detection points, and specifically comprises the following steps:
READY: firstly, the initial ignition state is OFF, the ignition frequency is initialized to 0, and the start-up fuel gas cut-OFF valve is closed, the embodiment comprises 4 ignition detection points, namely the start-up fuel gas cut-OFF valve XV25009A/B/C/D is closed, and after one-key ignition is started, the operation is switched to STEP 1.
STEP 1: the method comprises the following STEPs that a main fuel gas cut-off valve XV25005, a pilot burner fuel gas cut-off valve XV25007, a main fuel gas emptying cut-off valve XV25006 and a pilot burner fuel gas emptying cut-off valve XV25008 are all closed, on the premise that a synthesis gas compressor operates normally, a nitrogen purging valve HV25007 is opened, nitrogen purging is conducted until 100% is conducted, after the nitrogen purging is conducted for a preset time, the nitrogen purging valve HV25007 is closed, and STEP 2 is turned over;
in the embodiment, when the air input FT25005 of the synthesis gas compressor is more than or equal to 8000, the operation is considered to be normal;
in the present example, the nitrogen purge time was set to 3 minutes and 45 seconds.
STEP 2: and after confirming that no interlocking alarm and no fire detection signal exist, turning to STEP 3.
STEP 3: and (3) opening the pilot light fuel gas cutoff valve XV25007, opening the primary fuel gas cutoff valve XV25005, closing the primary fuel gas emptying cutoff valve XV25006 and the pilot light fuel gas emptying cutoff valve XV25008, and turning to STEP 4.
STEP 4: the inlet pressure of pilot fuel gas is regulated by using a pilot fuel gas regulating valve PIC25005 and a burner fuel gas regulating valve PIC25004, so that the fuel gas pressure PIC25005 (a system PT25040) and PIC25004 (a system PT25036) are stabilized at 15 kpa;
and turning to STEP 5 on the premise that the inlet pressure PT25040 of the fuel gas of the pilot burner is not more than 60 KPa.
STEP 5: in the embodiment, 4 fire detection points are included, the ignition frequency of each fire detection point is set, and if the fire detection point still fails to ignite within the preset ignition frequency, the next fire detection point is entered; in the present embodiment, 3 times of cyclic ignition per ignition point is set.
Firstly, judging the ignition frequency N _ A of the ignition detection point A, and jumping to STEP 11 if the ignition frequency N _ A is greater than 2(0 is the first ignition and 1 is the second ignition); if the value is less than or equal to 2, STEP 6 is started.
STEP 6: counting the ignition frequency N _ A of the fire detection point A by +1, opening an pilot light solenoid valve SV25001A of the fire detection point A, and turning to STEP 7; the step timer 5S is set.
STEP 7: an pilot light solenoid valve SV25001A of an ignition detection point A is in an open state, 2S later, an ignition rod A remote ignition solenoid valve is started, and 5S later, STEP 8 is switched; the ignition motion of the ignition rod a can last 10S.
It is understood that the time period is the preferred time period range given in this embodiment, and can also be adjusted according to the actual process.
STEP 8: closing the remote ignition electromagnetic valve of the ignition rod A, detecting whether flame exists after the ignition rod ignites the fire detection point A, if flame exists, adjusting the valve opening of a fuel gas regulating valve HV25006A of a start-up work channel of the fire detection point A, turning to STEP 9, and if flame does not exist, turning to STEP 10;
in this embodiment, the valve opening is 5%; it will be appreciated that the valve opening may also be set according to the process.
STEP 9: if the opening degree of the start-up channel fuel gas regulating valve HV25006A of the fire detection point A is larger than 3%, the start-up channel fuel gas cut-off valve XV25009A of the fire detection point A is opened, and the ignition of the fire detection point A is successful;
and after the ignition of the fire detection point A is normal, switching into SIS interlocking and DCS flame loss valve closing interlocking, entering the ignition operation of the next fire detection point B according to the requirement of the temperature rise rate, turning to STEP 11, wherein the ignition sequence control STEP is the same as that of the fire detection point A.
STEP 10: if no flame is detected, the STEP can set the time to be 3S, close the fuel gas regulating valve HV25006A of the start-up circuit of the fire detection point A, close the fuel gas cut-off valve XV25009A of the start-up circuit of the fire detection point A, close the pilot lamp electromagnetic valve SV25001A of the fire detection point A, jump to STEP 1, purge nitrogen, restart the ignition rod A for ignition;
the ignition is repeated for 2 times in a circulating mode, if the preset ignition time threshold value is exceeded, the ignition of the ignition point A cannot be successfully ignited, the ignition of the ignition point A fails, and the ignition operation of the next ignition point B is started; go to STEP 11.
In this example, nitrogen purge was performed for each misfire;
in this embodiment, if an abnormality occurs during the ignition sequence control, the stop ignition button may be clicked to end the sequence control procedure.
STEP 11: judging the ignition frequency N _ B of the ignition detection point B, and jumping to STEP 17 if the ignition frequency N _ B is greater than 2; if the value is less than or equal to 2, STEP 12 is started.
STEP 12: the number of times of ignition N _ A of the fire detection point B is counted to be +1, an pilot light solenoid valve SV25001B of the fire detection point B is opened, and the STEP 13 is switched.
STEP 13: the pilot lamp solenoid valve SV25001B of the ignition detection point B is in an open state, 2S later, the ignition rod B remote ignition solenoid valve is started, 5S later, STEP 14 is turned, and the ignition action of the ignition rod B can continue for 10S.
STEP 14: closing the remote ignition electromagnetic valve of the ignition rod B, detecting whether flame exists after the ignition rod ignites the fire detection point B, if flame exists, adjusting the valve opening degree of a fuel regulating valve HV25006B of a start-up circuit of the fire detection point B, turning to STEP 15, and if flame does not exist, turning to STEP 16;
in this embodiment, the valve opening is 5%; it will be appreciated that the valve opening may also be set according to the process.
STEP 15: and if the opening degree of the start-up circuit fuel regulating valve HV25006B of the fire detection point B is larger than 3%, opening the start-up circuit fuel gas cut-off valve XV25009B of the fire detection point B, igniting the fire detection point B successfully, entering the ignition operation of the next fire detection point C, turning to STEP 17, and performing the same fire detection A and B.
STEP 16: if no flame is detected, the STEP can set the time to be 3S, the open-circuit fuel gas regulating valve HV25006B of the fire detection point B is closed, the pilot lamp electromagnetic valve SV25001B of the fire detection point B is closed, the open-circuit fuel gas cut-off valve XV25009B of the fire detection point B is closed, if the fire detection point A has fire jump to STEP 11, the fire detection point B is continued, and if the fire detection point A has no fire jump to STEP 1, nitrogen purging is carried out again.
STEP 17: judging the ignition frequency N _ B of the ignition detection point C, and jumping to STEP 23 if the ignition frequency N _ B is greater than 2; if the value is less than or equal to 2, STEP 18 is started.
STEP 18: the number of times of ignition N _ a of the fire detection point C is counted to +1, the pilot light solenoid valve SV25001C of the fire detection point C is turned on, and the STEP 19 is switched.
STEP 19: the pilot lamp solenoid valve SV25001C of the ignition detection point C is in an open state, 2S later, the ignition rod C remote ignition solenoid valve is started, 5S later, STEP 20 is turned, and the ignition action of the ignition rod C can continue for 10S.
STEP 20: closing the remote ignition electromagnetic valve of the ignition rod C, detecting whether flame exists after the ignition rod ignites the fire detection point B, if so, adjusting the valve opening degree of a start-up path fuel adjusting valve HV25006C of the fire detection point C, turning to STEP 21, and if not, turning to STEP 22.
In this embodiment, the valve opening is 5%; it will be appreciated that the valve opening may also be set according to the process.
STEP 21: if the valve opening of the start-up path fuel regulating valve HV25006C of the fire detection point C is larger than 3%, the start-up path fuel gas cut-off valve XV25009C of the fire detection point C is opened, the ignition operation of the next fire detection point D is started after the fire detection point C is successfully ignited, and the STEP 23 is switched.
STEP 22: if no flame is detected, the STEP can set the time to be 3S, the open-circuit fuel gas regulating valve HV25006C of the fire detection point C is closed, the pilot light electromagnetic valve SV25001C of the fire detection point C is closed, the open-circuit fuel gas cut-off valve XV25009C of the fire detection point C is closed, if the fire detection point A or the fire detection point B has fire, the STEP is skipped to STEP 17 to continue the point C, and if the fire detection point A and the fire detection point B have no fire, the STEP is skipped to STEP 1 to carry out nitrogen purging again.
STEP 23: judging the ignition times N _ B of the ignition detection point D, and jumping to STEP 29 if the ignition times N _ B are greater than 2; if the value is less than or equal to 2, STEP 24 is started.
STEP 24: the number of times N _ A of ignition of the fire detection point D is counted to be +1, an pilot light solenoid valve SV25001D of the fire detection point D is opened, and the STEP is switched to the STEP 25.
STEP 25: the pilot lamp solenoid valve SV25001D of the ignition detection point D is in an open state, 2S later, the remote ignition solenoid valve of the ignition rod D is started, 5S later, STEP 26 is turned, and the ignition action of the ignition rod D can be continued for 10S.
STEP 26: closing the ignition rod D for remote ignition, detecting whether flame exists after the ignition rod ignites the fire detection point B by the electromagnetic valve, if the flame exists, adjusting the valve opening degree of a start-up circuit fuel adjusting valve HV25006D of the fire detection point D to be 5% (according to process setting), turning to STEP 27, and if the flame cannot be detected, turning to STEP 28.
STEP 27: if the opening degree of the valve of the start-up circuit fuel regulating valve HV25006D of the fire detection point D is larger than 3%, the start-up circuit fuel gas cut-off valve XV25009D of the fire detection point D is opened, the ignition of the fire detection point D is successful, and the feedback signal of opening of the XV25009D is detected to jump to STEP 29.
STEP 28: if no flame is detected, the STEP can set the time to be 3S, the working channel fuel gas regulating valve HV25006D of the fire detection point D is closed, the pilot light electromagnetic valve SV25001D of the fire detection point D is closed, the working channel fuel gas cut-off valve XV25009D of the fire detection point D is closed, if a flame exists at the fire detection point A, the fire detection point B or the fire detection point C, the STEP jumps to STEP 23, the STEP D is continued, and if no flame exists at the fire detection point A, the fire detection point B and the fire detection point C, the STEP jumps to STEP 1 to carry out nitrogen purging again.
STEP 29: counting the fire detection times by N _ A, N _ B, N _ C, N _ D clear 0; detecting the number of successfully ignited fire detection points, and if the number is more than or equal to 2, successfully igniting the coal chemical industry start-up heating furnace and normally operating; if the current time is less than 2, the ignition fails, all valves are closed, and the ignition sequential control is quit;
if the STEP 29 normally runs, the signal of the fire detection HJ1 of the fire detection point A is lost, the corresponding pilot burner electromagnetic valve SV25001A is closed, the open work channel fuel gas cut-off valve XV25009A is closed, and the open work channel fuel gas regulating valve HV25006A is closed; the fire detectors HJ2 at fire detector B, HJ3 at fire detector C, and HJ4 at fire detector D close the corresponding valves as do HJ1 at fire detector a.
In this embodiment, the status of the sequence control step is displayed, and when any step is executed, the corresponding step is green, and the rest is gray;
in the embodiment, after the ignition is successful, the corresponding fire detection point displays a real-time flame image;
in the embodiment, each path of ignition pause function is provided according to the real-time temperature of the heating furnace; and no matter the sequential control or manual ignition is carried out, if the fire detection signal is lost, the pilot burner cut-off valve and the fuel gas cut-off valve of the working path of the corresponding path are closed in an interlocking manner; and the functions of history storage and query of the detection signals are provided.
Example 2
This embodiment provides a coal industry start-up heating furnace ignition system, includes:
the pre-ignition module is used for opening the pilot burner fuel gas cut-off valve and the main fuel gas cut-off valve, adjusting the pilot burner fuel gas inlet pressure, opening the pilot burner electromagnetic valve of the fire detection point, and detecting whether flame exists after the ignition rod ignites the fire detection point;
the first ignition module is used for adjusting the valve opening of a start-up path fuel gas adjusting valve of the fire detection point if flame exists, opening the start-up path fuel gas stop valve of the fire detection point, successfully igniting the fire detection point and entering the ignition operation of the next fire detection point;
the second ignition module is used for closing the pilot burner electromagnetic valve of the fire detection point if no flame exists, restarting the ignition rod after nitrogen purging, detecting the ignition frequency of the fire detection point, failing to ignite if the preset ignition frequency threshold is exceeded, and entering the ignition operation of the next fire detection point;
the ignition judging module is used for detecting the number of successful ignition after all the ignition detection points are sequentially ignited, and if the number exceeds a preset successful number threshold value, the ignition of the coal chemical industry start-up heating furnace is successful; otherwise, the ignition fails.
It should be noted that the above modules correspond to steps S1 to S4 in embodiment 1, and the above modules are the same as the examples and application scenarios realized by the corresponding steps, but are not limited to the disclosure in embodiment 1. It should be noted that the modules described above as part of a system may be implemented in a computer system such as a set of computer-executable instructions.
In further embodiments, there is also provided:
an electronic device comprising a memory and a processor and computer instructions stored on the memory and executed on the processor, the computer instructions when executed by the processor performing the method of embodiment 1. For brevity, no further description is provided herein.
It should be understood that in this embodiment, the processor may be a central processing unit CPU, and the processor may also be other general purpose processors, digital signal processors DSP, application specific integrated circuits ASIC, off-the-shelf programmable gate arrays FPGA or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and so on. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may include both read-only memory and random access memory, and may provide instructions and data to the processor, and a portion of the memory may also include non-volatile random access memory. For example, the memory may also store device type information.
A computer readable storage medium storing computer instructions which, when executed by a processor, perform the method described in embodiment 1.
The method in embodiment 1 may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software modules may be located in ram, flash, rom, prom, or eprom, registers, among other storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor. To avoid repetition, it is not described in detail here.
Those of ordinary skill in the art will appreciate that the various illustrative elements, i.e., algorithm steps, described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (8)
1. A coal chemical industry start-up heating furnace ignition method is characterized by comprising the following steps:
starting a pilot lamp fuel gas cut-off valve and a main fuel gas cut-off valve, adjusting the fuel gas inlet pressure of the pilot lamp, starting a pilot lamp electromagnetic valve of a fire detection point, and detecting whether flame exists after a fire detection point is ignited by a fire detection rod;
if flame exists, the valve opening degree of a start-up path fuel gas regulating valve of the fire detection point is regulated, a start-up path fuel gas cut-off valve of the fire detection point is opened, the fire detection point is ignited successfully, and the ignition operation of the next fire detection point is started;
if no flame exists, the pilot lamp electromagnetic valve of the fire detection point is closed, the ignition rod is restarted after nitrogen purging is carried out, the ignition frequency of the fire detection point is detected, if the preset ignition frequency threshold value is exceeded, the ignition fails, and the ignition operation of the next fire detection point is carried out;
after all the fire detection points are sequentially ignited, detecting the number of successfully ignited fire, and if the number exceeds a preset successful number threshold value, successfully igniting the coal chemical industry start-up heating furnace; otherwise, the ignition fails;
except the first fire detection point, after the other fire detection points fail to ignite, if at least one fire detection point before the fire detection point is ignited successfully, nitrogen purging is not carried out; and if all the fire detection points before the fire detection point fail to ignite, performing nitrogen purging.
2. The ignition method of a coal chemical industry start-up heating furnace of claim 1, wherein the inlet pressure of the pilot burner fuel gas is adjusted to 60kpa or less.
3. The ignition method of a coal chemical industry start-up heating furnace of claim 1, wherein the valve opening is greater than 3%.
4. The ignition method of the coal chemical industry start-up heating furnace of claim 1, wherein the SIS interlock and the DCS flame loss valve closing interlock are put into operation after the ignition of the fire detection point is successful.
5. The ignition method of the coal chemical industry start-up heating furnace according to claim 1, wherein when the coal chemical industry start-up heating furnace is in normal operation, a flame signal of any one fire detection point is lost, and the pilot lamp electromagnetic valve, the start-up path fuel gas cut-off valve and the start-up path fuel gas regulating valve corresponding to the fire detection point are closed.
6. The utility model provides a coal industry start-up heating furnace ignition system which characterized in that includes:
the pre-ignition module is used for opening the pilot burner fuel gas cut-off valve and the main fuel gas cut-off valve, adjusting the pilot burner fuel gas inlet pressure, opening the pilot burner electromagnetic valve of the fire detection point, and detecting whether flame exists after the ignition rod ignites the fire detection point;
the first ignition module is used for adjusting the valve opening of a start-up path fuel gas adjusting valve of the fire detection point if flame exists, opening the start-up path fuel gas stop valve of the fire detection point, successfully igniting the fire detection point and entering the ignition operation of the next fire detection point;
the second ignition module is used for closing the pilot burner electromagnetic valve of the fire detection point if no flame exists, restarting the ignition rod after nitrogen purging, detecting the ignition frequency of the fire detection point, failing to ignite if the preset ignition frequency threshold is exceeded, and entering the ignition operation of the next fire detection point;
the ignition judging module is used for detecting the number of successful ignition after all the ignition detection points are sequentially ignited, and if the number exceeds a preset successful number threshold value, the ignition of the coal chemical industry start-up heating furnace is successful; otherwise, the ignition fails.
7. An electronic device comprising a memory and a processor and computer instructions stored on the memory and executed on the processor, wherein the computer instructions, when executed by the processor, perform a method of igniting a coal chemical start-up heater according to any one of claims 1 to 5.
8. A computer readable storage medium storing computer instructions which, when executed by a processor, perform a method of igniting a coal chemical industry start-up heating furnace according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010523690.4A CN111720853B (en) | 2020-06-10 | 2020-06-10 | Ignition method and system for coal chemical industry start-up heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010523690.4A CN111720853B (en) | 2020-06-10 | 2020-06-10 | Ignition method and system for coal chemical industry start-up heating furnace |
Publications (2)
| Publication Number | Publication Date |
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| CN111720853A CN111720853A (en) | 2020-09-29 |
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| TWI793459B (en) * | 2020-10-12 | 2023-02-21 | 中國鋼鐵股份有限公司 | Method for adjusting the flame of pilot burner |
| CN112413640A (en) * | 2020-11-23 | 2021-02-26 | 上海轻叶能源股份有限公司 | Intelligent gas burner ignition system |
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