CN112413640A - Intelligent gas burner ignition system - Google Patents
Intelligent gas burner ignition system Download PDFInfo
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- CN112413640A CN112413640A CN202011318643.2A CN202011318643A CN112413640A CN 112413640 A CN112413640 A CN 112413640A CN 202011318643 A CN202011318643 A CN 202011318643A CN 112413640 A CN112413640 A CN 112413640A
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- gas
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- valve
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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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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/06—Fire prevention, containment or extinguishing specially adapted for particular objects or places of highly inflammable material, e.g. light metals, petroleum products
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
- A62C4/02—Flame traps allowing passage of gas but not of flame or explosion wave in gas-pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q23/00—Testing of ignition installations
Abstract
The invention discloses an intelligent gas burner ignition system, and relates to the technical field of burner ignition devices; comprises a combustor ignition part prized in one closed device and a gas delivery part prized in the other closed device; the combustor ignition part is provided with an intelligent ignition state tracking subsystem, an incandescent lamp ignition subsystem, a combustor ignition subsystem, a nitrogen purging subsystem, a double-valve leakage detection subsystem and a fire-fighting fire extinguishing subsystem; the gas conveying part is provided with a double-valve leakage detection subsystem; the gas conveying part is used for conveying gas to the combustor ignition part. The invention has high ignition efficiency and high safety in the ignition process.
Description
Technical Field
The invention relates to the technical field of combustor ignition devices, in particular to an intelligent gas combustor ignition system.
Background
The key point of successful start of the gas combustion furnace is the ignition of the burner, the ignition process of the burner has a set of program specifications with strict requirements, if the ignition program and the requirements of the specifications are violated, a light person restarts the start, the start time is prolonged, a heavy person can have implosion caused by ignition, and the safety accident of casualties or damage to equipment of the furnace is caused, even the mechanical equipment of the gas furnace is damaged or cannot be used.
The following 8 dangerous factors cause safety accidents of the gas furnace
1. The incomplete start-up of the gas-fired pre-furnace purge results in the gas-fired furnace combustion chamber containing an explosive mixture after ignition of the gas-fired furnace.
2. Too small a quantity of combustion air results in incomplete combustion, thereby allowing combustible gases to accumulate in the combustion chamber or explosive mixtures to form after combustion.
3. The liquid brought out by the fuel gas-liquid separation tank causes unstable flame when the combustion furnace is ignited, so that the effusion in the combustion chamber causes implosion of the effusion in the combustion chamber or over-temperature burning-out of equipment.
4. Air and fuel gas are supplied without a flame in the burner.
5. The fuel gas enters a furnace area pipe network, and due to the fact that the pipe network is complex and is sealed and leaked, various valves, flanges and pipelines are scattered, and the generated combustible gas leaks and enters a hearth to be ignited by naked fire to explode a furnace area.
6. Because the gas cut-off valve is opened for a long time, the fuel gas pressure of the pilot burner igniter, the flame sensor and the valve position communicator can not reach the standard of the specification, so that mismatching is caused, the ignition is failed, or the combustible gas is released after the time is prolonged.
7. The leakage of the gas valve causes the hearth of the gas furnace to accumulate combustible gas to cause ignition implosion.
8. The distance between the gas cut-off valve and the combustor pipeline is long, so that air oxygen enters the gas pipeline to cause tempering.
Because the conventional burner ignition operation or PLC program control at present can not overcome the above 8 dangerous factors, so that safety accidents occur, even the manual ignition which is backward and forward, the operation time is long, the labor intensity is high, and the dangerous consequences are caused to the personal safety of operators by adopting naked flame manual ignition.
Disclosure of Invention
The invention aims to provide an intelligent gas burner ignition system, which aims to solve the problems in the prior art and has high ignition efficiency and high safety in an ignition process.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides an intelligent gas burner ignition system, which comprises a burner ignition part prized in one closed device and a gas conveying part prized in the other closed device; the combustor ignition part is provided with an intelligent ignition state tracking subsystem, an incandescent lamp ignition subsystem, a combustor ignition subsystem, a nitrogen purging subsystem, a double-valve leakage detection subsystem and a fire-fighting fire extinguishing subsystem; the gas conveying part is provided with a double-valve leakage detection subsystem; the gas conveying part is used for conveying gas to the combustor ignition part.
Optionally, the burner ignition part comprises an incandescent lamp ignition subsystem and a burner ignition subsystem which are arranged at the ignition position of the combustion furnace; the burner ignition subsystem is arranged on a burner at the ignition position of the combustion furnace, and the pilot burner ignition subsystem comprises a pilot burner fixedly arranged on one side of the burner; the burner is connected with a first flame arrester through a burner metal hose, the first flame arrester is connected with a burner gas transmission pipeline, a self-control cut-off valve is arranged on the burner gas transmission pipeline, the pilot burner is connected with a second flame arrester through a pilot burner metal hose, the second flame arrester is connected with the pilot burner gas transmission pipeline, and the pilot burner gas transmission pipeline is provided with the self-control cut-off valve; the combustor gas transmission pipeline is communicated with the gas transmission part through a combustor cut-off valve, and the pilot burner gas transmission pipeline is communicated with the gas transmission part through a pilot burner cut-off valve; the pilot burner is connected with a pilot burner igniter, and the pilot burner igniter is connected with an explosion-proof junction box; the gas conveying part is communicated with the gas distribution device.
Optionally, the intelligent ignition state tracking subsystem includes an ignition phase analysis module; the nitrogen purging subsystem comprises a nitrogen conveying pipe communicated with the hearth and a gas conveying pipeline, and a flowmeter and a valve are arranged on the nitrogen conveying pipe; and a gas pressure gauge is arranged at the hearth.
Optionally, the double-valve leak detection subsystem includes a VLDU functional module, the VLDU functional module is in signal connection with a pressure gauge, a temperature gauge and a gas flow meter, and the pressure gauge, the temperature gauge and the gas flow meter are respectively disposed at control valve positions of gas transmission pipelines of the gas transmission portion and the burner ignition portion.
Optionally, the fire fighting subsystem comprises an alarm device and a fire extinguishing device; the alarm device comprises a combustible gas alarm instrument and a wind power and wind direction measuring transmitter which are arranged in the gas conveying part and the combustor ignition part, and the wind power and wind direction measuring transmitter is distributed at the periphery inside the gas conveying part and the combustor ignition part; the alarm device also comprises a digital intelligent camera probe arranged on the gas furnace; the alarm device is connected with an intelligent control module; the fire extinguishing device comprises a control end connected with a cut-off valve of the gas transmission pipeline, the control end is connected with the nitrogen purging subsystem, and the nitrogen purging subsystem can be controlled to transmit nitrogen.
Compared with the prior art, the invention has the following technical effects:
the invention combines related valve positions, instruments, flange elbows, emptying devices and the like of fuel gas into an integrated fuel gas system skid-mounted GSS and intelligent field burner ignition skid-mounted AGBU, designs special condition discrimination and state tracking ASTS function software, obtains specific dynamic leakage data of the valve through dynamic testing and calculation by a valve leakage detection and fuel gas introduction function module, ensures the ignition reliability to be more than 99 percent, and strictly prevents the fuel gas from leaking into a hearth to cause flash explosion in the ignition process.
The invention utilizes an NP functional module to balance the pressure, the flow and the temperature of nitrogen with the volume of a hearth and the flow of pressure flue gas of the hearth by utilizing the pressure, the volume and the temperature of a gas equation to establish an intelligent and dynamic mathematical model so as to fill the volume of the hearth and a flue, and carry out gas replacement at a volume of 5 times within 5 minutes. At 1 of the pressure in its furnace. 5 times of calculation is carried out, and dynamic control is carried out.
And meanwhile, obtaining a dynamic furnace leakage coefficient A according to the ratio of the inlet air flow (standard state) to the flue gas outlet flow (standard state). According to the invention, the hearth system A is qualified between 1.0-1.1, and the data is obtained in the daily operation and test process.
The VLDU functional module can know the real volume between the double valves by utilizing the manufacturing and testing superiority of skid-mounted equipment in a factory, and simultaneously, the VLDU functional module is used as software in an ABIS system and can scan the relevant dynamic parameters of an ignition system, such as the dynamic real pressure, the pressure difference, the valve position opening and closing time of fuel gas and test all the needed tests. The dynamic gaseous equation is utilized by the gas parameters of dynamic fuel gas pressure, flow, temperature, volume.
A valve leakage detection mathematical model is established, the accuracy of calculating the real valve leakage rate by using the mathematical model is greatly higher than that of leakage detection equipment provided in the current market, and meanwhile, the test is convenient, the time is short, and all gas valves can be tested.
The patent ABIS of the present invention designs an intelligent ignition phase analysis function module IPA.
IPA utilizes the compact integration characteristic of intelligent gas burner field ignition skid-mounted AGBU-i and the burner, and a high-precision historical data trend chart F is obtained through a computer.
Calculating the separation time alpha of an pilot burner cut-off valve, the ignition time beta of an igniter, the full opening time gamma of a burner gas cut-off valve and the ignition time delta of a burner flame, compiling alpha, beta, gamma and delta as time phases into an F diagram for automatic intelligent analysis with the accuracy error of 0.2 second, carrying out self-diagnosis according to the national burner (gas) ignition standard, finding out the cause of ignition failure, and carrying out intelligent monitoring on the quality of ignition equipment, namely storing the phase parameters of alpha, beta, gamma and delta into an intelligent database at the beginning of an open flame test of a manufacturer, and ensuring the ignition reliability of an ABIS system to be more than 99%.
The invention utilizes the combustible gas alarm instrument and the wind power and wind direction measuring transmitter which are arranged in the fuel gas skid-mounted system GSS, adopts a two-out-of-two redundancy algorithm, and calculates the combustible gas alarm model of each point and the trend of the space gas flow through a power calculation model of the diffusion of the combustible gas and the air flow to obtain the interval range of the combustible gas diffusion and a flow trend graph, once the combustible gas diffusion interval is close to a burner of a gas furnace, or a combustible gas diffusion area comprises the gas furnace, a fire control and fire extinguishing system FOU can automatically pre-alarm fire, and automatically interlocks the gas furnace to cut off the flame of the burner.
The gas furnace is provided with a digital intelligent camera probe, the probe can carry out digital simulation on video signals of a hearth and a convection section (without flame), and the video signals are compared with the digital form of the hearth during fire in a digital model form, diagnosed, used for alarming and safely interlocking the hearth fire.
The FOU fire-fighting and extinguishing system can automatically establish a fire-extinguishing mathematical model for the volume, pressure, temperature and nitrogen pressure and flow of the whole hearth and the convection section flue, fills nitrogen with 5 times of volume within 2-3 minutes of fire, continuously replaces oxygen, and controls the hearth pressure within the pressure range of the hearth leakage and implosion (testing and determining).
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of an intelligent gas burner ignition system of the present invention;
FIG. 2 is a schematic view of an intelligent control terminal of the intelligent gas burner ignition system of the present invention;
FIG. 3 is a schematic view of the skid-mounted gas delivery section of the present invention;
FIG. 4 is a schematic view of the burner ignition portion of the present invention skid mounted;
FIG. 5 is a schematic view of an ignition phase analysis of a Changming lamp according to the present invention;
FIG. 6 is an analysis of the burner ignition phasing of the present invention;
wherein, 1 is combustor ignition portion, 2 is gas conveying portion, 3 is gas conveyor, 4 is the flue, 5 is intelligent control terminal, 6 is combustion furnace, 7 is bivalve leak hunting subsystem, 8 is the pilot burner, 9 is the combustor, 10 is combustor metal collapsible tube, 11 is first spark arrester, 12 is combustor gas transmission pipeline, 13 is the automatic control trip valve, 14 is the pilot burner metal collapsible tube, 15 is the pilot burner gas transmission pipeline, 16 is the pilot burner point firearm, 17 is explosion-proof terminal box.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide an intelligent gas burner ignition system, which aims to solve the problems in the prior art and has high ignition efficiency and high safety in an ignition process.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides an intelligent gas burner ignition system, which comprises a burner ignition part 1 prized in one closed device and a gas conveying part 2 prized in another closed device, as shown in figures 1-6; the combustor ignition part 1 is provided with an intelligent ignition state tracking subsystem, an incandescent lamp ignition subsystem, a combustor ignition subsystem, a nitrogen purging subsystem, a double-valve leakage detection subsystem 7 and a fire-fighting fire extinguishing subsystem; the gas conveying part 2 is provided with a double-valve leakage detection subsystem; the gas delivery unit 2 is connected to a gas delivery device 3 for delivering gas to the burner ignition unit 1.
The two sets of skid-mounted devices of the combustor ignition part 1 and the gas conveying part 2 comprise all cut-off valves, adjusting valves and various transmitters of a gas furnace ignition system ABIS, and all cut-off valves, adjusting valves and various transmitters of the gas furnace ignition system ABIS are respectively connected with an intelligent control terminal 5. The two sets of skid-mounted devices have installation data which accord with national standards, the sizes and distances of the skid-mounted devices are optimized, the skid-mounted devices are manufactured strictly according to patent requirements and manufactured in special manufacturing factories, special detection instruments are used for detecting the skid-mounted devices, special quality tests are carried out on valves, flanges and short pipe elbows of the skid-mounted devices, the control sensitivity and the opening time of the skid-mounted devices meet the patent requirements of the invention, the skid-mounted devices are reliable in quality, the overall sizes of the skid-mounted devices accord with the requirements of long-distance containers due to the fact that the skid-mounted devices are integrally mounted on site, the skid-mounted devices are reliable and.
The combustor ignition part comprises an incandescent lamp ignition subsystem and a combustor ignition subsystem; the burner ignition subsystem is arranged on a burner 9 at the ignition position of the combustion furnace 6, and the pilot burner ignition subsystem comprises a pilot burner 8 fixedly arranged on one side of the burner; the combustor 9 is connected with a first flame arrester 11 through a combustor metal hose 10, the first flame arrester 11 is connected with a combustor gas transmission pipeline 12, a self-control cut-off valve 13 is arranged on the combustor gas transmission pipeline 12, the pilot burner 8 is connected with a second flame arrester 18 through a pilot burner metal hose 14, the second flame arrester 14 is connected with a pilot burner gas transmission pipeline 15, and the pilot burner gas transmission pipeline 15 is provided with the self-control cut-off valve 13; the burner gas transmission pipeline 12 is communicated with the gas transmission part through a burner cut-off valve, and the pilot burner gas transmission pipeline 15 is communicated with the gas transmission part through a pilot burner cut-off valve; the pilot lamp 8 is connected with a pilot lamp igniter 16, and the pilot lamp igniter 16 is connected with an explosion-proof junction box 17; the gas conveying part is communicated with the gas distribution device.
The nitrogen purging subsystem is obtained by calculating the gas replacement rate in 5 minutes at a volume 3-5 times by a volume filling method according to the actual capacity of the hearth and the flue 4 and the pressure of air and nitrogen and the pressure of the hearth, wherein the pressure is greater than 1.5 times of the pressure of the hearth. Meanwhile, the flow rates of air and nitrogen are balanced with the flow rate of an outlet of the flue, so that the problem that the gas furnace cannot be completely purged due to air leakage is solved.
The purging scheme is carried out on an intelligent mathematical model, dynamic analysis and tracking updating are carried out, purging is carried out cleanly, and meanwhile the leakage rate and the leakage coefficient (the ratio of gas flow entering the furnace to flow discharged from a flue in a fixed pressure state) of the gas furnace are calculated to be qualified, wherein the leakage coefficient A is 1.0-1.1.
The invention discloses a VLDU intelligent function module of a double-valve leak detection subsystem lead-in system, which is designed and invented aiming at the defects of the prior double-valve leak detection scheme and has the following advantages
a) The VLDU is an intelligent functional module composed of calculation software, the parameters are collected from the valve and pressure parameters in ABIS system, and no any device is added to carry out dynamic leak detection test on all valves.
b) The VLDU function module collects the total pressure of gas and the volume of the test section and the opening time of the valve during the dynamic test of the fixed volume between the tested double valves (the volume of each section is input into a VLDU database in the factory manufacturing process), and the leakage rate of the dynamic valve can be measured by converting the pressure change of the gas in the volume into the volume change on the fixed volume parameter, namely the leakage rate, and the national leakage rate of the valve has a standard data, and comparing the standard data with the detection data, wherein the precision is more than 5 percent and is completely satisfied.
Because the leakage amount of the valve is strictly controlled, the safety accident that the combustible gas in the hearth is mixed with air to cause ignition and implosion due to the leakage of the gas valve is overcome.
c) The VLDU valve leakage detection and gas introduction functions enable gas to be introduced into an inlet of a gas cut-off valve of a combustor of a skid-mounted AGBU-i for on-site ignition of the combustor in the leakage detection process, air cannot enter a gas pipeline from the combustor inlet, the distance between the gas cut-off valve and the combustor is 1-2 meters in a compact structure, the gas can reach the combustor within 0.2 second, and the ignition reliability is more than 99% (within 5 seconds) at the moment, so that the tempering accident is overcome in the ignition process.
The pilot burner ignition subsystem and the combustor ignition subsystem are used in many places at present, because the ignition process is completed in a short time, and meanwhile, the ignition process is completed in 5 seconds through the linkage of a gas cut-off valve, an igniter, a flame sensor (comprising an ion bar and an optical sensor), a high-pressure generator and the like according to the national standard TSG GB001-2008, if the sensitivity of one of the cut-off valve, the igniter and the flame sensor cannot meet the requirement, the ignition process can exceed 5 seconds, the fuel gas must be automatically cut off after the ignition is not performed for more than 5 seconds, and the ignition is completed within 5 seconds.
The success rate of completing ignition within 5 seconds is low, and according to statistics, the success rate is about 50%, namely the reliability is 50%. If the ignition is determined successfully by manual judgment within 5 seconds, the ignition program of the existing pilot burner and the combustor cannot be popularized. Finding the cause and the problem of a specific ignition device beyond 5 seconds ignition time according to the current technology is also not achievable.
The pilot burner ignition subsystem and the burner ignition subsystem of the invention are designed with an intelligent ignition phase analysis IPA functional module. The ignition process of the whole burner is to ignite the pilot burner in the first step, the second part utilizes the flame of the pilot burner to ignite the burner, the time of the pilot burner ignition process and the time of the burner ignition process are both within 5 seconds, and in order to ensure that the pilot burner and the burner are ignited within 5 seconds, the ignition phase analysis of the invention requires
1. The full opening time of the fuel gas shut-off valve is less than 1 second from the signal sending to the full opening, and the time phase is the same.
Defining: the valve of the pilot lamp is fully opened for a time phase of alpha, which is less than 1 second
The full-opening time phase of the gas valve position of the burner is gamma and is less than 1 second
2. Ignition of the pilot burner is delayed by 0.5 second than that of the gas cut-off valve
3. The ignition time of the pilot burner and the burner is less than 5 seconds
Is determined from: the ignition time phase position beta of the pilot burner is equal to the time from the ignition of the igniter to the receiving of the ignition signal of the pilot burner flame sensor and is less than 5 seconds
The ignition time phase of the burner is delta, which is equal to the time from the full opening of the gas valve of the burner to the signal received by the flame sensor of the burner and is less than 5 seconds
From the above phase definition of the ignition process it can be seen that
1. Long bright lamp igniting process time alpha + beta 1+ 5-0.5-5.5 second
2. Time of ignition process of burner is 5 seconds
From the above, the actual ignition time of the pilot burner is beta, 5 seconds, and reaches the national TSG GB001-2016 standard
The actual ignition time delta of the burner is 5 seconds and also reaches the national TSG GB001-2016 standard
The time phase of alpha, beta, gamma and delta of the IPA function analysis module of the invention defines the maximum value when the time value, and the actual data should be smaller than the defined value.
The IPA function analysis of the patent function is intelligent, and the hidden danger and the fault of each ignition device in the ignition process can be obtained by combining the data logic obtained by experiments with the intelligent analysis F graph, and the reason is found out for rectification and automatic analysis.
The IPA intelligent ignition analysis function is designed with an intelligent ignition database, and an IPA module stores the data of the whole ignition process and alpha, beta, gamma and delta phase parameters of the process in the database as historical trends. For analysis and automatic diagnosis, aiming at the defects of the current ignition program scheme, the ignition program and the intelligent ignition phase analysis module IPA are combined to have the following advantages:
a) in the open fire test before each burner leaves the factory, each burner and the intelligent field burner ignition skid-mounted AGBU are integrally tested, an IPA intelligent ignition phase analysis function module is adopted in the test process, alpha, beta, gamma and delta parameters and test analysis are carried out on a test platform, all the parameters are qualified and can leave the factory, each burner is coded and stored in an IPA intelligent database, the ignition qualification rate of the gas furnace burner is ensured to be more than 99%, and the reliability is more than 99%.
b) The IPA intelligent ignition phase analysis function module stores the ignition parameters of each time as historical trend data in an intelligent database and automatically performs self-learning, and automatically updates alpha, beta, gamma and delta phase parameters to analyze the quality of each ignition device and automatically diagnose.
c) Every gas furnace is furnished with an IPA intelligent function module and contains the historical trend of all combustor parameters of stove, can automatic diagnosis, analysis, even if rectify every combustor and every set of intelligent on-the-spot combustor AGBU be compact corresponding integrated relation can not influence the normal work of other combustors when rectifying.
Faults which can occur in the ignition process of the combustor are eliminated before ignition, and the ignition reliability is ensured to be more than 99%.
The combustor emergency shutdown BESD of the intelligent gas combustion ignition system ABIS comprises a fire-fighting subsystem FOU. The ABIS intelligent burner ignition system achieves the purposes of intelligence, self diagnosis and pre-treatment, and truly eliminates the fire hazard. Once a fire condition occurs, the FOU intelligent function module can automatically alarm to eliminate hidden dangers.
The invention designs two skid-mounted devices, namely: GSS is skid-mounted on site at a fuel gas conveying part and AGBU is skid-mounted at a burner ignition part. The skid-mounted gas alarm integrates easily-leaked equipment such as a gas pipeline, a corresponding valve, a control valve, a flange, an elbow and an instrument sensor into one skid-mounted device, and combustible gas alarms are installed at the upper and lower streams of the skid-mounted device, and the combustible gas alarm alarms when the concentration of combustible gas contained in the air is about 50% of the explosive range. Because of adopting the skid-mounted form, the leakage points are managed in a centralized way, the operation is convenient, the maintenance is convenient, and self diagnosis and intelligent management can be carried out.
The method is characterized in that a combustible gas alarm system is installed in two types of skid-mounted devices, an XAS-001 redundant wind power and wind direction measuring speed changer is installed at the same time, a two-out-of-two redundant algorithm is adopted, combustible gas alarm signals of all points and the trend of space flow are calculated through a power calculation model of combustible gas diffusion and air flow, the interval range and the flow trend graph of combustible gas diffusion are obtained, once a combustible gas diffusion interval is close to a burner of a gas furnace, or a gas furnace is included in a diffusion area, a fire control and fire extinguishing system FOU can automatically pre-alarm fire, the gas furnace is automatically interlocked, and flames of the burner are cut off.
The digital intelligent camera probe is installed on the gas furnace, the intelligent hearth camera probe can carry out digital conversion on video signals of a hearth furnace tube and a convection section (without flame), the digital model form is compared with the hearth fire digital form, the hearth fire is diagnosed to give an alarm, once the intelligent module diagnoses the fire, the FOU fire extinguishing system can automatically cut off fuel gas, and the nitrogen fire extinguishing valve FV200 is opened. FOU can carry out mathematical model to the volume of whole furnace, pressure, temperature, nitrogen gas's pressure, flow automatically and calculate, fills gas furnace with 5 times's furnace volume in 2 ~ 3 minutes, constantly replaces oxygen, reaches fire extinguishing effect.
The FOU fire-fighting and extinguishing system is provided with a field emergency fire-extinguishing button at a furnace gas furnace field control room and a field skid-mounted operating panel, and carries out fire-extinguishing operation at any time.
The GSS part comprises a gas VIDU flowmeter, a pressure transmitter, a gas cut-off valve, a gas pressure control valve, a high-point vent valve, a valve leakage detection unit (mainly equipment), a self-operated regulating valve, a combustible gas alarm instrument (AIA-001/AIA-002), an online gas calorific value analyzer AI-101, a wind power and wind direction measuring transmitter XAS-001A/B, a gas pipeline, an elbow, a manual valve, a flange, a pressure gauge field ignition panel SFP and a field junction box GSS/JBI, wherein the equipment containing the electric instruments achieves the explosion-proof, corrosion-proof and waterproof EX dIIBT4 and IP65 grades and completely meets the national standard. A valve leakage detection mathematical model is established, the accuracy of calculating the real valve leakage rate of the valve leakage detection mathematical model according to a standard gas equation is greatly higher than that of leakage detection equipment provided in the current market by using the mathematical model, and meanwhile, the valve leakage detection mathematical model is convenient to test and quick in time and can be used for testing all gas valves.
Standard gaseous equation:
wherein P is1、P2Is the pressure; t is1、T2Is the temperature; v1、V2Is a volume.
Wherein AGBU-i part: the flame sensor comprises a burner, an incandescent lamp, a flame sensor (comprising the incandescent lamp and the burner), an incandescent lamp high-voltage ignition module (AGBU/GB), an explosion-proof junction box (AGBU/JB2), an on-site pressure gauge, an on-site manual valve, an incandescent lamp gas flame arrester ZQ-01, a burner gas flame arrester ZQ-02 and an incandescent lamp and burner gas cut-off control valve. The combustor and all equipment are a compact integrated skid-mounted unit, the fuel gas is connected through a special fuel gas metal hose, the disassembly and the assembly are convenient, the maintenance is convenient, the combustor and all equipment are compact integrated and comprise flame arresters, air hardly enters a fuel gas pipeline, the occurrence of unsafe backfire accidents in the ignition process is prevented, the skid-mounted devices are produced in a factory and are tested by special testing equipment, meanwhile, open fire test conditions of the combustor can be met, as long as the ignition reliability of signals and the ignition reliability of the fuel gas entering the skid-mounted unit is over 99%, the analysis algorithm of an intelligent system is ensured, and self diagnosis is reliably carried out.
All the electric appliances and instruments in the AGBU-i part reach the explosion-proof, corrosion-proof and waterproof grades EXDIIBT4 and IP65
(1) Gas furnace gas spot skid-mounted GSS process automatic control flow (see GSS virtual frame for details)
The fuel gas enters the GSS device and firstly enters a fuel gas shunt tank V-001 for liquid removal and D1-010, and a pressure transmitter and a liquid level transmitter are automatically monitored.
The fuel gas after liquid removal enters a GSS skid-mounted system, the FIQ-001, the PS-001 and the PV-001 (pressure control valves) control the gas flow pressure to alarm and safely interlock the gas pressure, once an overrun ABIS intelligent system alarms until the fuel gas is cut off, safety accidents caused by ignition failure of a combustor are prevented, a double-valve cut-off and high-point emptying valve is designed on a gas pipeline leading to the combustor, an Yili transmitter and a related valve leakage detection unit VIDU-1/2 (and related leakage detection software is prepared) are arranged between the double valves, and the double cut-off valve XCV-10A/B is arranged when the fuel gas pipeline runs normally. When closed, the high point vent valve XCV-100C vents. XCV-100C, the emptying valve is used for emptying the leaked fuel gas to the high altitude, and the fuel gas is ensured not to enter the F-101 hearth; once the double valve XCV-1-A/B is opened, XCV-100C is closed to prevent gas from being released to the atmosphere through XCV-100C, and XCV-100V with the caliber between DN15 and DN20 (due to the small caliber) can ensure that the emptying valve has no leakage.
The GSS skid-mounted pneumatic membrane regulating valve can regulate the pressure and flow of fuel gas according to the intelligent control requirement in the process of pilot burner ignition or burner ignition of an intelligent ABIS system to meet the regulation and control requirements and can also carry out intelligent optimization control on temperature, pressure, fuel gas and air double-crossing amplitude limiting air-fuel ratio. And the other path of fuel gas is led out from the PS-001 outlet of the flowmeter pressure transmitter and controlled by a PCV-001 self-operated regulating valve to meet the requirement of the pilot burner on the fuel gas pressure. The function and control requirements of the double block valves XCV-200A/B and XCV0200C (high point blow-down valve) and the double valve leak detection subsystem VIDU-2 are the same as the fuel gas double valve, blow-down valve, and leak detection unit of the combustor.
(2) Process automatic control flow chart of intelligent burner integrated skid-mounted AGBU-i (see GSS virtual frame for details)
The AGBU-i intelligent combustion integrated skid-mounted device is a compact device, each burner is one set, and the number of AGBU-i skid-mounted burners is the same as that of AGBU-i skid-mounted burners.
And the fuel gas enters each path of combustor integrated skid-mounted AGBU after passing through the GSS skid-mounted device.
The fuel gas of the pilot burner and the burner respectively enters respective fuel gas systems.
The fuel gas of the pilot burner enters the pilot burner ZQ-01 through a manual valve of the pilot burner and an automatic control cut-off valve XCV-101A and enters the pilot burner through metal software. The pilot lamp comprises a high-voltage igniter and a pilot lamp ion rod flame sensor. And signal wires of the instruments enter an anti-explosion junction box AGBU/JB2, and according to the indication of the pilot lamp ignition subsystem PIS-F, a corresponding pilot lamp gas cut-off valve is opened, a high-pressure igniter is started, and the corresponding pilot lamp is ignited within 5 seconds.
The signal wire of the explosion-proof junction box is directly connected with the computer I/O card of the ABIS system, and the intelligent ABIS ignition system controls the whole burning process of the combustion gas through the I/O card interface
The ignition of the burner of the gas furnace is to occupy fuel gas by flame of the pilot burner, after the flame of the pilot burner is stable, an ignition selection module BIS-C of the burner selects the number of the burner, a burner ignition subsystem BIS-F automatically opens a fuel gas cut-off valve XCV-101B of the burner according to the selected number of the burner, the cut-off valve is completely opened within 1 second, the fuel gas reaches the burner within 0.2 second after the cut-off valve is opened, the pressure of the fuel gas meets the combustion requirement of the burner at the moment, the fuel gas of the burner is ignited within 5 seconds, a burner flame ABIS intelligent system displays that the burner is successfully ignited, and an ignition program of the next burner is prepared to enter.
In the whole ignition process of the pilot burner and the burner, an ignition phase analysis IPA course model of an intelligent ignition system ABIS system can automatically record the ignition process of each pilot burner and the burner, phase parameters of alpha (full opening time of a pilot burner gas cut-off valve), beta (flame ignition time of the pilot burner), gamma (full opening time of a burner gas cut-off valve) and delta (flame ignition time of the burner) are input into an intelligent database of IPA for intelligent diagnosis, automatic learning and updating, and the intelligent ignition system enters an industrial use stage after being qualified after an open flame test is carried out before a factory leaves a factory because of skid-mounting, the condition meets the condition of an intelligent ignition state tracking system ASTS, the reliability of ABIS ignition is more than 99%, and if the field ignition process time exceeds 5 seconds (specified by national standard TSG GB 001-2008)
The pilot burner ignition system PIS and the burner ignition subsystem BIS of the ABIS system can automatically close corresponding fuel gas cut-off valves, prevent the fuel gas from excessively entering a fuel gas hearth due to no flame ignition and mixing with air to form combustible gas to cause flash explosion and safety accidents, and if the fuel gas is not ignited, an ignition phase analysis IPA function module automatically diagnoses to indicate the reason of ignition failure and the rectification scheme
(1) Computer hardware system of ABIS
(a) The ABIS computer hardware system is a triple computer system with a security level of SIL3
(b) ABIS system configuration ABIS operator station, ABIS engineer station
(c) The ABIS system cabinet is composed of a power supply part, a CPU part, an I/O card part, a safety grid and a relay part
(d) The ABIS system is in communication linkage with a DCS control system of the production device through an RS-485 interface and a DO.DI hard contact.
(2) Operation process of ABIS system
(a) Part of fuel gas
The fuel gas enters a GSS skid-mounted device from an outlet of a gas-liquid separation tank V-010 for flow and pressure monitoring, valve leakage detection, and linkage of heat value and pressure height. And the compact intelligent combustors redistributed to each combustor are integrally skid-mounted through GSS field skid-mounting to carry out intelligent ignition.
The whole process has the characteristics of simple integration, convenient operation, convenient maintenance, intelligent control, safety and reliability. The ABIS system instrument is automatic to achieve centralized control, signal lines and an operation panel of the gas instrument are highly centralized, and the ABIS system instrument is convenient to operate and maintain.
(i) All field gas, ignition, monitoring is operated on the GSS field ignition panel SFP, including manual/auto ignition selection, and all pilot lights, burner ignition are visible on site.
(ii) The SFP field operation panel is provided with a field emergency furnace-stopping button and an emergency fire-extinguishing button, which completely meet the national safety standard requirements for gas furnaces.
(iii) The AGBU skid-mounted high-pressure ignition module and the compact structure of the gas pipeline cut-off valve and the burner overcome the tempering accident and ensure the ignition reliability.
(iv) All control signal lines of the intelligent instrument are arranged in the GSS/JB1 and AGBU/JB2 junction boxes, and the junction boxes are convenient to install and maintain.
The ABIS intelligent software and functional module consists of four major subsystems
Namely: intelligent ignition state tracking subsystem ASTA
Ignition subsystem PIS of Changming lamp
Combustor ignition subsystem BIS
Combustor emergency lift BESD
Each system is composed of intelligent function modules
The functional modules have special requirements and algorithms for calculation, can work independently and can be linked, chain structures are formed among the functional modules, corresponding operation pictures are combined with the lesson modules, and the operation process flow is in a topological graph form, so that the operation is convenient, clear and reliable.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (5)
1. The utility model provides an intelligence gas burner ignition system which characterized in that: comprises a combustor ignition part prized in one closed device and a gas delivery part prized in the other closed device; the combustor ignition part is provided with an intelligent ignition state tracking subsystem, an incandescent lamp ignition subsystem, a combustor ignition subsystem, a nitrogen purging subsystem, a double-valve leakage detection subsystem and a fire-fighting fire extinguishing subsystem; the gas conveying part is provided with a double-valve leakage detection subsystem; the gas conveying part is used for conveying gas to the combustor ignition part.
2. The intelligent gas burner ignition system of claim 1, wherein: the combustor ignition part comprises an incandescent lamp ignition subsystem and a combustor ignition subsystem; the burner ignition subsystem is arranged on a burner at the ignition position of the combustion furnace, and the pilot burner ignition subsystem comprises a pilot burner fixedly arranged on one side of the burner; the burner is connected with a first flame arrester through a burner metal hose, the first flame arrester is connected with a burner gas transmission pipeline, a self-control cut-off valve is arranged on the burner gas transmission pipeline, the pilot burner is connected with a second flame arrester through a pilot burner metal hose, the second flame arrester is connected with the pilot burner gas transmission pipeline, and the pilot burner gas transmission pipeline is provided with the self-control cut-off valve; the combustor gas transmission pipeline is communicated with the gas transmission part through a combustor cut-off valve, and the pilot burner gas transmission pipeline is communicated with the gas transmission part through a pilot burner cut-off valve; the pilot burner is connected with a pilot burner igniter, and the pilot burner igniter is connected with an explosion-proof junction box; the gas conveying part is communicated with the gas distribution device.
3. The intelligent gas burner ignition system of claim 2, wherein: the intelligent ignition state tracking subsystem comprises an ignition phase analysis module; the nitrogen purging subsystem comprises a nitrogen conveying pipe communicated with the hearth and a gas conveying pipeline, and a flowmeter and a valve are arranged on the nitrogen conveying pipe; and a gas pressure gauge is arranged at the hearth.
4. The intelligent gas burner ignition system of claim 3, wherein: the double-valve leakage detection subsystem comprises a VLDU functional module, the VLDU functional module is in signal connection with a pressure gauge, a temperature gauge and a gas flowmeter, and the pressure gauge, the temperature gauge and the gas flowmeter are respectively arranged at the control valve positions of gas transmission pipelines of the gas transmission part and the burner ignition part.
5. The intelligent gas burner ignition system of claim 4, wherein: the fire-fighting subsystem comprises an alarm device and a fire-fighting device; the alarm device comprises a combustible gas alarm instrument and a wind power and wind direction measuring transmitter which are arranged in the gas conveying part and the combustor ignition part, and the wind power and wind direction measuring transmitter is distributed at the periphery inside the gas conveying part and the combustor ignition part; the alarm device also comprises a digital intelligent camera probe arranged on the gas furnace; the alarm device is connected with an intelligent control module; the fire extinguishing device comprises a control end connected with a cut-off valve of the gas transmission pipeline, the control end is connected with the nitrogen purging subsystem, and the nitrogen purging subsystem can be controlled to transmit nitrogen.
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| CN202111395370.6A CN113915641B (en) | 2020-11-23 | 2021-11-23 | Intelligent gas burner ignition system |
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| CN113915641A (en) * | 2020-11-23 | 2022-01-11 | 上海轻叶能源股份有限公司 | Intelligent gas burner ignition system |
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Also Published As
| Publication number | Publication date |
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| CN113915641A (en) | 2022-01-11 |
| CN113915641B (en) | 2023-06-06 |
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