CN202511284U - Numerical control gas burner - Google Patents

Numerical control gas burner Download PDF

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Publication number
CN202511284U
CN202511284U CN2011205460855U CN201120546085U CN202511284U CN 202511284 U CN202511284 U CN 202511284U CN 2011205460855 U CN2011205460855 U CN 2011205460855U CN 201120546085 U CN201120546085 U CN 201120546085U CN 202511284 U CN202511284 U CN 202511284U
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CN
China
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gas
valve
control
numerical control
flame
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CN2011205460855U
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Chinese (zh)
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李延新
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李延新
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Priority to CN2011205460855U priority Critical patent/CN202511284U/en
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Publication of CN202511284U publication Critical patent/CN202511284U/en

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Abstract

The utility model discloses a numerical control gas burner. The numerical control gas burner comprises a gas valve group, a gas metering unit, an air blower, an ignition device, a flame detecting device and a high-intelligent numerical control system which are arranged in a matching manner. When the numerical control gas burner works, the high-intelligent numerical control system controls the gas valve group to output gas flow adapting to the flame openness by presetting the flame openness of the burner according to feedback signals and manual instructions of temperature or pressure; and the rotating speed of the air blower is calculated and adjusted according to the gas flow and the air-fuel ratio provided by the gas metering unit, so that the condition that the air blower can output the optimal gas distribution quantity all the time in the large-range flame adjusting process. The high-intelligent numerical control system is completely different from a special controller of the conventional gas engine, can monitor and record the whole burning process and important parameters of a controlled object at any time, and can send out acoustic, light and text information for alarming when a fault exists; and the burner can be automatically controlled to adopt corresponding measures to ensure the absolute safety of people and equipment according to the severity level of the fault.

Description

A kind of numerical control gas burner system
Technical field
The utility model relates to combustor, particularly, relates to a kind of numerical control gas burner system.
Background technology
At present, in the burner notion of broad sense, the water heater of family expenses, gas range, so that lighter etc. can be thought a kind of of burner (or combustor).By its operation principle, can burner be defined as: be a kind of material to be transformed a kind of equipment of heat energy through this chemical reaction mode of burning, be about to air and convert so that it fully burns by proper proportion is mixed through pre-mixing apparatus with fuel.
Gas burner system (like the combustion of natural gas machine) is a kind of firing equipment of using gases fuel, makes combustion gas and air spray the device general designation of mixing (or mixing ejection) burning in a certain way; Gas engine divides several kinds of industrial gas engines, domestic gas machine, extraordinary gas engine with application by type.
Conventional ratio adjustable type gas burner is as shown in Figure 1, comprises air blast 1, pressure-reducing valve 2, combustion gas transfer valve 3, combustion gas delivery valve 4, gas control valve 5, YE 6, motor steering controller 7, gas nozzle 8, high-tension ignition electrode 9, diffusion sheet 10, precombustion chamber 11, volume damper 12, air intake 13, fuel gas inlet 14, flame export 15, flame eye 16, pressure switch 17, leakage detection apparatus 18, gas ignition rifle 19, igniter solenoid valve 20, nonshared control unit 21 and air blast blast switch 22.
In Fig. 1, air intake 13, volume damper 12 are equipped with air blast 1 successively, constitute air input passage; Fuel gas inlet 14, pressure-reducing valve 2, combustion gas transfer valve 3, combustion gas delivery valve 4, gas control valve 5 are equipped with gas nozzle 8 successively, constitute the combustion gas input channel; Igniter solenoid valve 20, high-tension ignition electrode 9, gas ignition rifle 19 cooperate forms igniting unit; Diffusion sheet 10, precombustion chamber 11, flame export 15 are formed burning gallery; YE 6, motor steering controller 7 are equipped with the composition regulon with volume damper 12, gas control valve 5; Pressure switch 17, leakage detection apparatus 18, flame eye 16, air blast blast switch 22 become the control system of safety with nonshared control unit 21 mutual group.
In igniting and burning gallery, the output channel of gas control valve 5 is connected to gas nozzle 8, and high-tension ignition electrode 9 is equipped with at the diffusion sheet center near air blast one side with gas ignition rifle 19; From the pipeline between combustion gas transfer valve 3 and the combustion gas delivery valve 4, draw igniter solenoid valve 20, pipeline is connected to gas ignition rifle 19; Combustion gas transfer valve 3, combustion gas delivery valve 4, igniter solenoid valve 20, the output with nonshared control unit 21 links to each other respectively; Diffusion sheet 10 ring-types are arranged on the inboard of precombustion chamber symmetrically; The outlet of gas nozzle 8 is not confined to the inboard of diffusion sheet; Flame eye 16 is arranged between air blast 1 and the diffusion sheet 10.
In the ratio regulon, motor steering controller 7 drives volume damper 12 and gas control valve 5 adjusted in concert behind YE 6; Nonshared control unit 21 control A.C. contactors are connected to air blast 1; Pressure switch 17 is drawn between pressure-reducing valve 2 and combustion gas transfer valve 3, and signal is connected to the input of nonshared control unit 21; Leakage detection apparatus 18 is drawn between combustion gas transfer valve 3 and combustion gas delivery valve 4, and signal also is connected to the input of nonshared control unit 21.
The flame regulative mode of above-mentioned conventional ratio adjustable type gas burner is formed link gear by mechanical air door and gas valve, through the method for synchronous change air door and air valve opening, and the intensity of control flame.Because mechanical type throttle opening and air mass flow are non-linear, and can not precise quantification, so regulate comparatively loaded down with trivial details, the control of air-fuel ratio also can not be very precisely, and not only the thermal efficiency can be affected, and operating personnel also are difficult to control in using.This kind mode requires bleed pressure very stable in addition, otherwise the fluctuation of air pressure can cause the change of air-fuel ratio.Because domestic a lot of users' source of the gas is high pressure or liquefied natural gas, unsettled situation often appearred in air pressure when gas tank switched.Even if gas supply conduit is when the peak period air pressure with gas also can fluctuate.The unstable flow of gaseous-pressure will change naturally, directly has influence on the burning and the thermal efficiency.
Because the control device of conventional gas engine is very simple; Can only be according to fixing mode operation; Can not realize chain control and intelligent alarm large-scale and high automation, high security, high stability and high intelligence that the high-performance burner needs, exist obviously that the air-fuel ratio precision is low, thermal conversion efficiency is low, stable security is relatively poor and defective such as complicated operating process.
The utility model content
To the problems referred to above, the utility model proposes a kind of numerical control gas burner system, and to realize the precise quantification of air-fuel ratio, the automation that significantly improves Combustion Process Control improves stability, security and thermal conversion efficiency, and simplifies the advantage of debugging with operating process.
For realizing above-mentioned purpose, the technical scheme that the utility model adopts is: a kind of numerical control gas burner system comprises the burnt gas valve group, gas metering unit, air blast, igniter, flame detection device and the high intelligent numerical control system that are equipped with;
In the work; Said high intelligent numerical control system; According to signal and manual command such as the temperature of flame detection device and gas metering unit feedback or pressure, through preset control instruction (like the flame aperture of preset combustor), the gas flow that the output of control burnt gas valve group and flame aperture adapt; And the required air-fuel ratio of the gas flow that provides according to the gas metering unit and the igniter ratio of combustion gas (air with), calculate and regulate the rotating speed of air blast, guarantee air blast best air distribution amount of output all the time in flame adjustment process on a large scale.
Further, said high intelligent numerical control system comprises signal acquisition module, computing and control module and human-computer interaction module, and the automatic instrument(s) that is connected with said signal acquisition module respectively, and literal and/or sound and light alarm module; Wherein:
Said signal acquisition module is used to gather the gaseous-pressure signal of gas metering unit output, the air blast blast switch signal of air blast output, the flare up fire of flame detection device output and the output signal of temperature or pressure signal and automatic instrument(s);
Said computing and control module are used for the signal gathered according to signal input module, the input parameter that combines the user to set through human-computer interaction module, carry out calculation process after, control the burnt gas valve group and export corresponding gas flow; Simultaneously, through regulating the frequency converter output frequency of air blast, control air blast and see the required best air distribution amount of the burning that is complementary with gas flow off;
Said human-computer interaction module is used for user's setting and input relevant parameter, and the combustion state parameter that shows computing and control module output in real time;
Said automatic instrument(s) is used for comprising at least to the input of computing and control module the automatic instrument(s) signal of temperature signal;
Said literal and/or sound and light alarm module are used for when combustion system breaks down, reporting to the police automatically, in time take corresponding measure to notify the user.
Further, said computing and control module comprise programmable logic controller (PLC) PLC, single trigger and computer.
Further, said human-computer interaction module comprises touch-screen, or operation push-button and LED display module.
Further, said burnt gas valve group comprises the combustion gas transfer valve, gas control valve, the combustion gas delivery valve that are provided with through the pipeline order; The output of high intelligent numerical control system is being controlled said combustion gas transfer valve, gas control valve and combustion gas delivery valve;
Said burnt gas valve group is transported to gas nozzle with combustion gas, and gas nozzle sprays into precombustion chamber with combustion gas again, and the three is equipped with and has formed the combustion gas input channel.
Further; Said igniter comprises lighting valve, burning torch and isolating high-pressure ignitor; The pipeline that combustion gas is drawn between said combustion gas transfer valve and gas control valve is communicated to burning torch through lighting valve, after the combustion gas of burning torch ejection is lighted by isolating high-pressure ignitor, sprays into precombustion chamber; The output of high intelligent numerical control system is being controlled said lighting valve, burning torch/isolating high-pressure ignitor.
Further, said pressure transmitter cooperates high intelligent numerical control system, forms gas flow metering unit, is used for the hunt leak test and the gas flow of combustion process measured of burnt gas valve group;
Said pressure transmitter is arranged between said gas control valve and the combustion gas delivery valve; The output signal of said pressure transmitter is incorporated into the input of high intelligent numerical control system; Calculate the actual flow of trying to achieve combustion gas according to this signal, the output signal after the digital control system computing is again being controlled the frequency converter of described gas control valve and air blast.
Further, the air quantity of said air blast output is determined by Frequency Converter Control blower motor rotating speed; The input of frequency converter links to each other with the output of high intelligent numerical control system, and the output of frequency converter links to each other with blower motor;
The air of said air blast output is sent into precombustion chamber through diffusion sheet, forms air input passage.
Further, said burning torch, diffusion sheet, precombustion chamber and flame export are equipped with, and form igniting and burning gallery.
Said burning torch comprises ignitor and gas nozzle, and combining and configuring is installed in the diffusion sheet center near air blast one side, and is communicated with successively with precombustion chamber and flame export; The air that combustion gas that the combustion gas input channel is sent here and air input passage are sent here is lighted by igniter behind the diffusion sheet premix, and sprays from the flame export of precombustion chamber.
Further; Said flame detection device comprises flame probe and flame amplifier; Flame probe is installed between air blast and the diffusion sheet, and said flame probe is connected the flame amplifier input terminal, and the output signal of flame amplifier is connected to the input of digital control system.
In the above-described embodiments, the I/O end of said high intelligent numerical control unit is connected with external equipment by following mode:
Said pressure switch; Pressure transmitter, blast switch signal, temperature signal or the pressure signal of air blast, the flare up fire of flame eye; And the control signal of automatic instrument(s), be connected to the input of computing and control module (being preferably Programmable Logic Controller PLC) respectively; The various parameters of numerical control gas burner system can revised and show to the human-computer interaction module (being preferably touch-screen) that links to each other with PLC with data wire at any time; Combustion gas transfer valve, combustion gas delivery valve, gas control valve, lighting valve and frequency converter and burning torch/isolating high-pressure ignitor are connected to the output of PLC respectively.
In the above-described embodiments, the air blast that said frequency converter drives is installed in the air input passage, for burning provides oxygen.
In the above-described embodiments, said combustion gas transfer valve, gas control valve and combustion gas delivery valve are installed in proper order and have been formed the combustion gas main channel, for the main burner in the gas nozzle provides fuel.
In the above-described embodiments, said pressure transmitter is installed between combustion gas delivery valve and the gas control valve, and signals such as the detection of burnt gas valve group, leak detection and flow measurement are provided for high intelligent numerical control system.
In the above-described embodiments, said lighting valve also places between combustion gas transfer valve and the gas control valve, for numerical control gas burner system igniting and operating ever-burning flame provide source of the gas.
In the above-described embodiments, said pressure switch is installed in combustion gas transfer valve front end, is used for input air pressure is judged.
Preferably, in the above-described embodiments, the digital control system of said high intelligence, PLC forms by Programmable Logic Controller,
Said human-computer interaction module is realized by touch-screen and action button;
Said combustion gas input channel comprises the combustion gas transfer valve, gas control valve, combustion gas delivery valve and the gas nozzle that are provided with through the pipeline order; Said air input passage comprises air blast and diffusion sheet that order is provided with; Said air blast and gas nozzle are equipped with; Said igniting and burning gallery comprise precombustion chamber, diffusion sheet and are arranged on the inboard gas ignition rifle of diffusion sheet; In said air input passage, also be provided with flame eye, the signal of said flame eye outputs to the input of digital control system; Said flame eye comprises ultraviolet, ion and the probe of light-sensitive device composition and supporting with it flame amplifier; Said flame eye is arranged between air blast and the diffusion sheet.
The numerical control gas burner system of each embodiment of the utility model; Igniting and burning gallery; Be communicated to air input passage and combustion gas input channel respectively, blast, air pressure, flame, temperature and other manipulated signals in the numerical control gas burner system then is input to the input of high intelligent numerical control system; High intelligent numerical control system matches the actual flow of combustion gas and requirement through the aperture of adjusting control valve according to input instruction combustor flame aperture that provides and the combustion gas requirement that adapts to it again.
Because the numerical control gas burner system of each embodiment of the utility model can be measured the actual flow of combustion gas in real time; When changing, bleed pressure causes gas flow when fluctuation; High intelligent numerical control system can change the aperture of control valve automatically, thereby has realized the purpose of stable gas flow.Simultaneously, high intelligent numerical control system is regulated the rotating speed of air blast then automatically through the calculating of gas flow and air-fuel ratio, and air blast air quantity and air-fuel ratio are adapted, so has realized the precise quantification (being accurate to 1%) of the air-fuel ratio ratio of combustion gas (air with).In large-scale flame adjustment process,, make efficiency of combustion be in optimum state all the time like this according to the synchronous air distribution of the flow of combustion gas.Poor stability in the prior art, poor stability, air-fuel ratio precision are low, thermal conversion efficiency is low and the defective of complicated operating process thereby overcome, with realize that good stability, security are good, the air-fuel ratio precise quantification, thermal conversion efficiency is high and the simple advantage of operating process.
Further feature of the utility model and advantage will be set forth in specification subsequently; Can know from experience through the structure that is particularly pointed out in specification, claims and the accompanying drawing, perhaps understand the purpose and other advantages of the utility model through implementing the utility model.
Through accompanying drawing and embodiment, the technical scheme of the utility model is done further detailed description below.
Description of drawings
Accompanying drawing is used to provide the further understanding to the utility model, and constitutes the part of specification, is used to explain the utility model with the embodiment of the utility model, does not constitute the restriction to the utility model.In the accompanying drawings:
Fig. 1 is the operation principle sketch map of conventional ratio adjustable type gas burner system;
Fig. 2 is the operation principle sketch map of the utility model numerical control gas burner system;
Fig. 3 is the relation curve sketch map according to gaseous-pressure and flow before the nozzle in the utility model numerical control gas burner system;
Fig. 4 is the workflow sketch map according to the utility model numerical control gas burner system.
In conjunction with accompanying drawing, Reference numeral is following among the utility model embodiment:
The 1-air blast; The 2-pressure-reducing valve; 3-combustion gas transfer valve; 4-combustion gas delivery valve; The 5-gas control valve; The 6-YE; 7-motor steering controller; The 8-gas nozzle; 9-high-tension ignition electrode; The 10-diffusion sheet; The 11-precombustion chamber; The 12-volume damper; The 13-air intake; The 14-fuel gas inlet; The 15-flame export; The 16-flame eye; The 17-pressure switch; The 18-leakage detection apparatus; 19-gas ignition rifle; The 20-igniter solenoid valve; The 21-nonshared control unit; 22-air blast blast switch; The 23-touch-screen; The 24-Programmable Logic Controller; The 25-frequency converter; The 26-pressure transmitter; 27-is by controlling temperature or pressure signal source; 28-instrument automatic control signal.
The specific embodiment
Describe below in conjunction with the preferred embodiment of accompanying drawing, be to be understood that preferred embodiment described herein only is used for explanation and explains the utility model, and be not used in qualification the utility model the utility model.
According to the utility model embodiment, like Fig. 2, Fig. 3 and shown in Figure 4, a kind of numerical control gas burner system is provided, comprise the burnt gas valve group, gas metering unit, air blast, igniter, flame detection device and the high intelligent numerical control system that are equipped with.In the work, high intelligent numerical control system, according to the flare up fire of flame detection device feedback and the temperature or the pressure signal of controlled device, through preset control instruction, the gas flow that group output of control burnt gas valve and flame aperture adapt; And, calculate and regulate the rotating speed of air blast 1 according to gas flow and the required air-fuel ratio of igniter that the gas metering unit provides, guarantee the air distribution amount of air blast 1 output the best all the time in large-scale flame adjustment process.
Above-mentioned high intelligent numerical control system comprises signal acquisition module, computing and control module and human-computer interaction module that signal successively connects, and the automatic instrument(s) that is connected with the signal acquisition module signal respectively, reaches literal and/or sound and light alarm module; Wherein: signal acquisition module, gather the gaseous-pressure signal that is used for the input of gas metering unit, air blast blast switch 22 signals of air blast 1 output, flare up fire, the temperature of controlled device or the output signal of pressure signal and automatic instrument(s) of flame detection device output; Computing and control module are used for the signal according to signal acquisition module input, the input parameter that combines the user to set through human-computer interaction module, carry out calculation process after, control the burnt gas valve group and export corresponding gas flow; Simultaneously, through regulating the output frequency of air blast 1 frequency converter 25, control air blast 1 and see the required best air distribution amount of the burning that is complementary with gas flow off; Human-computer interaction module 23; Be used for setting and the input relevant parameter; And the combustion state parameter that shows the output of computing and control module in real time, but also display text and the warning message of acousto-optic alarm module when combustion system breaks down are in time taked corresponding measure to notify the user; Automatic instrument(s) 28 is used to show the temperature or the pressure and other parameters of controlled point, and to the automatic control signal of control module input output meter;
Above-mentioned computing and control module comprise programmable logic controller (PLC) (PLC) 24, single trigger and computer; Above-mentioned human-computer interaction module comprises touch-screen 23, or operation push-button and LED display module.
Above-mentioned burnt gas valve group comprises the combustion gas transfer valve 3, gas control valve 5, the combustion gas delivery valve 4 that are provided with through the pipeline order; Burnt gas valve group and gas nozzle 8 are equipped with, and form the combustion gas input channel.
Above-mentioned igniter comprises lighting valve 20 and burning torch 19; The pipeline of between combustion gas transfer valve 3 and gas control valve 5, drawing is communicated to burning torch through lighting valve.Burning torch is installed in the diffusion sheet center near air blast 1 one sides, and is communicated with successively with precombustion chamber 11 and flame export 15; Lighting valve 20, diffusion sheet, precombustion chamber 11 are equipped with flame export 15, form igniting and burning gallery.
Above-mentioned gas metering unit comprises pressure transmitter 26 and PLC24; Pressure transmitter 26 is arranged between gas control valve 5 and the combustion gas delivery valve 4; The output signal of pressure transmitter 26 is incorporated into the input of high intelligent numerical control system; The output of high intelligent numerical control system is being controlled the frequency converter 25 of combustion gas transfer valve 3, gas control valve 5, combustion gas delivery valve 4, lighting valve 20, burning torch 19 and air blast 1; Pressure transmitter 26 cooperates high intelligent numerical control system, is used for the burnt gas valve group hunted leak handling and the combustion gas of combustion process being measured.
The input of above-mentioned blower variable frequency device 25 links to each other with the output of high intelligent numerical control system, and the output of frequency converter 25 links to each other with blower motor; Air blast 1 is equipped with air intake 13, forms air input passage.
Above-mentioned flame detection device comprises flame eye 16, and flame eye 16 is arranged between air blast 1 and the diffusion sheet; The signal of flame eye 16 outputs to the input of digital control system, and flame eye 16 comprises ultraviolet, ion and the probe of light-sensitive device composition and supporting with it flame amplifier.
As shown in Figure 2, the igniting of present embodiment and burning gallery are communicated to air input passage and combustion gas input channel, and various signals are connected to the numerical control regulon respectively; The digital control system of high intelligence according to the gas flow of reality, is regulated the air distribution amount of air input passage automatically, with the flame of real-time regulated control igniting and burning gallery output.
In the above-described embodiments, the input/output terminal of above-mentioned digital control system is connected with outside by following mode:
Pressure switch 17, pressure transmitter 26, air blast blast switch 22, temperature or pressure signal acquisition module 27, flare up fire 16, with instrument automatic control signal 28, be connected to the input of Programmable Logic Controller (PLC) 24 respectively; The human-computer interaction module 23 (like touch-screen 23) that links to each other with PLC with data wire can be revised the various parameters with display system at any time; Combustion gas transfer valve 3, combustion gas delivery valve 4, gas control valve 5, lighting valve 20 and frequency converter 25, high-tension ignition electrode 9 are connected to the output of Programmable Logic Controller 24 respectively through lighting valve (like igniter solenoid valve 20) isolating high-pressure ignitor.
Above-mentioned pressure switch 17 is arranged between fuel gas inlet 14 and the combustion gas transfer valve 3, and pressure transmitter 26 is arranged between gas control valve 5 and the combustion gas delivery valve 4; Introduction pipe between combustion gas transfer valve 3 and gas control valve 5 is communicated to igniter solenoid valve 20 and burning torch 19.
Above-mentioned combustion gas input channel comprises the combustion gas transfer valve 3, gas control valve 5, the combustion gas delivery valve 4 and gas nozzle 8 that are provided with through the pipeline order; Combustion gas transfer valve 3, control valve 5 and combustion gas delivery valve 4 orders are installed and have been formed the combustion gas main channel, for main burner (like gas nozzle 8) provides fuel.
Above-mentioned gaseous-pressure transmitter 26 places between combustion gas delivery valve 4 and the control valve 5, for high intelligent numerical control system provides the detection of burnt gas valve group, leak detection and flow measurement signal.
Above-mentioned air input passage comprises air intake 13 (muffler can be set) and air blast 1 that order is provided with; Air blast 1 is installed in air intake 13 wing passages, is driven by frequency converter 25, for burning provides oxygen.Flame eye 16 is installed between air blast 1 and the precombustion chamber 11, and the flame that acts under the normal temperature state detects.
Above-mentioned igniter; Comprise cooperating and be installed near diffusion sheet (like diffusion sheet 10) high-tension ignition electrode 9 and burning torch (like gas ignition rifle 19); Gas ignition rifle 19 links to each other with the outlet side of igniter solenoid valve 20 through pipeline; The input side of igniter solenoid valve 20 is connected on the pipeline of drawing between combustion gas transfer valve 3 and the gas control valve 5.
Above-mentioned burning gallery comprises diffusion sheet, precombustion chamber 11, from the combustion gas of blast tube with from the air of air input passage, takes fire after in precombustion chamber 11, mixing, and final flame is from flame export 15 ejections.
The flame Principles of Regulation of the numerical control gas burner system that Fig. 2 shows in the foregoing description are: according to the detected actual gas flow of the high intelligent numerical control system of numerical control gas burner system; Provide the wind supply quantity of air blast 1 synchronously; When supply pressure fluctation causes gas flow to depart from predetermined value; System also can automatic deviation correction, thereby realizes 1: 10 accurate air distribution in the adjustable range.
For realizing above-mentioned functions, the numerical control gas burner system of the foregoing description has been equipped with on hardware and has measured the pressure transmitter 26 of gas flow and can accurately locate the gas control valve 5 of valve opening and the air blast 1 of frequency converter 25 speed governing.By Programmable Logic Controller 24, the gas flow that calculates is equipped with suitable air-fuel ratio on the software, regulates the output frequency of frequency converter 25 then, control air blast 1 provides and is fit to the required wind of burning.Like this, the operator just can realize the quantification adjustment (can be accurate to 1%) of air-fuel ratio easily on touch-screen 23, is guaranteeing that combustion thermal efficiency is in optimum state all the time in the flame adjusting on a large scale.
The conventional ratio adjustable type gas burner system that Fig. 1 shows is compared with the numerical control gas burner system that Fig. 2 shows, both are maximum difference:
(1) the numerical control gas burner system that shows of Fig. 2 can be measured the actual flow of combustion gas automatically, has realized precise quantification and fired state digital control of air-fuel ratio on this basis.Because the basis of air distribution no longer is valve opening but the actual gas flow of conventional ratio adjustable type gas burner system; So when bleed pressure changes; The control system of numerical control gas burner system can automatic regulating valve door aperture (stablizing gas flow), therefore allows bleed pressure that fluctuation is in a big way arranged.
(2) the numerical control gas burner system of the foregoing description by Siemens CPU224XP Programmable Logic Controller 24, has been formed high intelligent numerical control system.It has replaced the simple special-purpose program controller that solidifies of conventional gas engine.Therefore burning control no longer has been the notion of a single burner, can form the complete high intelligent numerical control system of a cover according to the whole needs of equipment; When fuel-firing gas-firing multi-functional combustion machine function conversion, at needs, add occasions such as tail gas detection and compensation, expanded application also can be more convenient.
(3) the numerical control gas burner system of the foregoing description; Can also add a large amount of fault diagnostic programs; In case the pathological system warning message with literal of sounding immediately that occurs in service; And numerical control gas burner system place control system is realized interlock protection according to the order of severity of fault, guaranteeing that helping operating personnel to fix a breakdown as early as possible on the safe basis resumes operation.
(4) the numerical control gas burner system of the foregoing description; The time real writing function that also has duty; The various important parameters of numerical control gas burner system place control system all can be recorded in wherein with the warning message that reaches tens of; This just is equivalent to the black box on the similar aircraft to combustor has been installed, in case quality or security incident take place, takes out initial data and both can come into plain view.And these data of combustor and state also can be realized communication with external equipment easily; This is for being which kind of coordinative composition of equipments all to be for the vital large-scale combustor to; Its security and practicality have more been increased undoubtedly; The function of the high intelligence of this kind hommization more meets the needs of modernized large-scale gas burner system, also is more suitable for national conditions.Design concept and excellent overall performance that this machine is advanced can be brought huge economic interests to the user undoubtedly, have significantly promoted automation, security, stability and the energy-conserving and environment-protective level of complete machine.
In the above-described embodiments, the numerical control gas burner system has following characteristics:
(1) application of pressure sensor (like pressure transmitter 26):
1. start is preceding through measuring the air pressure under each valve (opening or closing) different conditions, just can judge easily the state that comprises control valve 5 each valve of aperture and stopping leakage in the roof, and the method will be got well much than the leak detecting of the conventional leakage detection apparatus 18 that can not intuitively quantize.
2. after the latus rectum of gas nozzle 8 was confirmed, air pressure and flow before the nozzle will have basic corresponding relation.Therefore through the air pressure in the gaging nozzle preceding pipeline, can demarcate air-flow (referring to Fig. 3).
According to formula:
Q = πd 2 4 2 p ρu - - - ( 1 )
In formula (1), Q is a gas flow, and d is a nozzle diameter, and p is a gaseous-pressure, and ρ is a gas density, and μ is a resistance coefficient.
(2) function of Programmable Logic Controller 24 realizations:
Programmable controller can be according to the expanded function that requires of system, rather than as the nonshared control unit 21 of conventional gas engine, the most basic control function is only arranged.This has just left enough spaces to significantly promoting the complete machine performance.The Programmable Logic Controller 24 of the numerical control gas burner system of the foregoing description; On the basis of accomplishing conventional gas burner system basic function; A lot of critical functions have also been increased in the software program; Except above-mentioned high intelligent trouble self diagnosis, can also monitor temperature, emission detections and compensation such as controlled device and tail gas or the like simultaneously, in the switching of manual temperature control and instrument temperature control, also can add no disturbance handoff functionality.This shows: adopted after the Programmable Logic Controller 24, not only the performance of combustor has had important breakthrough, and can the function of entire equipment significantly be promoted, and for the equipment of similar boiler, can replace original control system fully.
Fig. 4 can show the workflow of the foregoing description numerical control gas burner system.In Fig. 4,, can accomplish the workflow of the foregoing description numerical control gas burner system through the software control of programmable controller 24; This workflow mainly comprises:
When (1) manual work provides enabled instruction; Under the situation that the combustion gas main valve cuts out; At first judge through the baroswitch at fuel gas inlet 14 places whether air pressure possesses service condition and judge through air pressure transmitter 26 whether the outlet side gaseous-pressure is approximately zero (nonconforming just warning, and termination working procedure), and the prefiring system of air blast 1 running beginning purges then; Whether control valve is opened fully simultaneously, normally get ready for checking each valve.
(2) open combustion gas delivery valve 4, close combustion gas delivery valve 4 again behind pressure transmitter 26 automatic clears, whether rise through measurement air pressure and judge whether combustion gas transfer valve 3 leaks gas.And then, confirm that the function of each valve is normal through measuring the gaseous-pressure under each valve different conditions, at last control valve is placed ignition location, opens combustion gas transfer valve 3.
(3), after valve self check end and air blast 1 purge and reach the scheduled time; Isolating high-pressure ignitor is opened with igniting gas valve 20; High-tension ignition stops after several seconds; After flame eye 16 confirmed that combustion gas have been lighted, combustion gas delivery valve 4 was opened, and this numerical control gas burner system is in 10% flame intensity and brings into operation.
(4) after big fire is lighted; High intelligent numerical control system will calculate the actual flow of combustion gas according to the gaseous-pressure of actual measurement; Constantly actual flow and preset flame aperture are compared, deviation occurs and compensate at once, effectively eliminated the unfavorable factor that supply pressure fluctation brings fired state; Flow with combustion gas shows through touch-screen 23 with accumulative total numerical value simultaneously, is used for the reference of cost accounting.
(5) output frequency that calculates frequency converter 25 according to gas flow and the air-fuel ratio of actual measurement, the air quantity that control air blast 1 provides meet just burn required.
(6) this numerical control gas burner system has two kinds of temperature controlling mode, can manually control flame intensity, can also control the flame aperture automatically according to the setup parameter of equipment temperature controlling point (or controlling steam pressure etc.).During to the conversion of instrument temperature control, system also has the defencive function of no disturbance switching, has only the error of automatic control opening value and actual opening value could be transformed into the instrument temperature control automatically less than 3% o'clock at manual temperature control.
(7) occasion of similar CNG high pressure sled car air feed; Switch or during pressure-reducing station failure and other reasons build-up of pressure big ups and downs in the work as because of source of the gas; Native system also will be closed the big fire gas valve when sending acousto-optic and literal warning message, prevent the serious accident that air failure causes.Because this numerical control gas burner system is provided with the kept burning day and night little fire at center, so complete machine shutdowns of can't thoroughly putting out a fire, like this when source of the gas accomplish switch pressure normally after, horse back can recover normal operation.Can not cause and shut down and igniting again, guarantee under the safe prerequisite, both guarantee the continuous property of the couplet of producing, avoid conventional gas engine number minute to shut down product quality problem that igniting again causes and the economic loss of bringing thus again because of the pressure oscillation of moment.
(8) because no matter in all case gas burner system, all is the visual plant that concerns the person and device security, the gas engine of especially large-scale and high-end key project more needs high safety and stability.This numerical control gas burner system has good fault self-diagnosis system, at any time each important parameter of monitoring system.When being exceeded standard, when unusual and fault appear in this numerical control gas burner system place state by the parameter of protection point; Send the warning of acousto-optic and Word message immediately; And system is realized interlock protection according to the order of severity of fault, for the person and equipment provide safety guarantee.
(9) there is the black box of similar aircraft in the control system of this numerical control gas burner system, can the various significant datas and the running status of combustor be noted at any time.Through watching historical record: tens information such as time, system mode, alarm content all can be come clearly into view, and for analytic product quality and quantity, for analyzing cause of accident full and accurate reliable data are provided all.
In sum; The numerical control gas burner system of above-mentioned each embodiment of the utility model belongs to a kind of numerically controlled automatic fuel gas combustor of employing of high intelligence, can measure automatically and stable gas flow; Thereby realize the precise quantification of the air-fuel ratio ratio of combustion gas (air with); In large-scale flame adjustment process,, make efficiency of combustion be in optimum state all the time according to the accurate air distribution of the flow of combustion gas.
What should explain at last is: the above is merely the preferred embodiment of the utility model; Be not limited to the utility model; Although the utility model has been carried out detailed explanation with reference to previous embodiment; For a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.

Claims (10)

1. a numerical control gas burner system is characterized in that: comprise the burnt gas valve group, gas metering unit, air blast, igniter, flame detection device and the high intelligent numerical control system that are equipped with;
In the work, high intelligent numerical control system is according to temperature or pressure feedback signal and manual command, and through the flame aperture of preset combustor, control burnt gas valve group is exported the gas flow that adapts with the flame aperture; And, calculate and regulate the rotating speed of air blast according to gas flow and air-fuel ratio that the gas metering unit provides, guarantee the air distribution amount of air blast output the best all the time in large-scale flame adjustment process.
2. numerical control gas burner system according to claim 1; It is characterized in that: said high intelligent numerical control system; Comprise signal acquisition module, computing and control module and human-computer interaction module that signal successively connects, and the automatic instrument(s) that is connected with said signal acquisition module signal respectively, reach literal and/or sound and light alarm module; Wherein:
Said signal acquisition module is used to gather the gaseous-pressure signal of gas metering unit output, the air blast blast switch signal of air blast output, flare up fire and the temperature of controlled device or the output signal of pressure signal and automatic instrument(s) of flame detection device output;
Said computing and control module are used for the collection signal according to signal acquisition module input, the input parameter that combines the user to set through human-computer interaction module, carry out calculation process after, control the burnt gas valve group and export corresponding gas flow; Simultaneously, through regulating the frequency converter output frequency of air blast, control air blast and see the required best air distribution amount of the burning that is complementary with gas flow off;
Said human-computer interaction module is used for user's setting and input relevant parameter, and the combustion state parameter that shows computing and control module output in real time;
Said automatic instrument(s) is used to show the temperature or the pressure parameter of controlled point, and sees the automatic control signal of instrument off to the input of digital control system;
Said literal and/or sound and light alarm module are used for when combustion system breaks down, reporting to the police automatically, in time take corresponding measure to notify the user.
3. numerical control gas burner system according to claim 2 is characterized in that: said computing and control module comprise programmable logic controller (PLC) PLC, single trigger and computer.
4. numerical control gas burner system according to claim 2 is characterized in that: said human-computer interaction module comprises touch-screen, or operation push-button and LED display module.
5. according to each described numerical control gas burner system among the claim 1-4, it is characterized in that: said burnt gas valve group comprises the combustion gas transfer valve, gas control valve, the combustion gas delivery valve that are provided with through the pipeline order; All valves of said burnt gas valve group all link to each other with the output of digital control system;
Said burnt gas valve group is transported to gas nozzle with combustion gas, and gas nozzle sprays into precombustion chamber with combustion gas again, and the three is equipped with and has formed the combustion gas input channel.
6. numerical control gas burner system according to claim 5; It is characterized in that: said igniter comprises lighting valve, burning torch and isolating high-pressure ignitor; The pipeline that combustion gas is drawn between said combustion gas transfer valve and gas control valve; Be communicated to burning torch through lighting valve, after the combustion gas of burning torch ejection is lighted by isolating high-pressure ignitor, spray into precombustion chamber; Lighting valve, burning torch and isolating high-pressure ignitor all link to each other with the output of digital control system.
7. numerical control gas burner system according to claim 5; It is characterized in that: said pressure transmitter cooperates high intelligent numerical control system to form gas flow metering unit, is used for the hunt leak test and the gas flow of combustion process measured of burnt gas valve group;
Said gaseous-pressure transmitter is arranged between gas control valve and the combustion gas delivery valve; The output signal of said pressure transmitter is incorporated into the input of high intelligent numerical control system; Calculate the actual flow of trying to achieve combustion gas according to this signal, the output signal after the digital control system computing is again being controlled the frequency converter of described gas control valve and air blast.
8. numerical control gas burner system according to claim 5 is characterized in that: the air quantity of said air blast output is determined by Frequency Converter Control blower motor rotating speed; The input of frequency converter links to each other with the output of high intelligent numerical control system, and the output of frequency converter links to each other with blower motor;
The air of said air blast output is sent into precombustion chamber through diffusion sheet, forms air input passage.
9. numerical control gas burner system according to claim 6 is characterized in that: said igniter, diffusion sheet, precombustion chamber and flame export are equipped with, and form igniting and burning gallery;
Said burning torch comprises ignitor and gas nozzle, and combining and configuring is installed in the diffusion sheet center near air blast one side, and is communicated with successively with precombustion chamber and flame export; The air that combustion gas that the combustion gas input channel is sent here and air input passage are sent here is lighted by igniter behind the diffusion sheet premix, and sprays from the flame export of precombustion chamber.
10. numerical control gas burner system according to claim 9 is characterized in that: flame eye also is installed between air blast and the diffusion sheet, and the signal of said flame eye outputs to the input of digital control system; Said flame eye comprises ultraviolet, ion and the probe of light-sensitive device composition and supporting with it flame amplifier.
CN2011205460855U 2011-12-23 2011-12-23 Numerical control gas burner CN202511284U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102519041A (en) * 2011-12-23 2012-06-27 李延新 Numerical control gas burner
CN103557533A (en) * 2013-11-06 2014-02-05 李延新 Numerical control gas burning device
CN103672904A (en) * 2013-12-19 2014-03-26 江阴江顺铝型材成套设备制造有限公司 Gas line of combustor
CN104006384A (en) * 2014-05-22 2014-08-27 李延新 Numerical control fuel oil combustion machine and self-inspection method thereof
CN104101084A (en) * 2014-08-07 2014-10-15 广西铂焰红外线科技有限公司 Direct gas-fired liquid heating device
CN105387614A (en) * 2015-12-03 2016-03-09 上海艾迪迦热能科技有限公司 Pipe-soaked type fuel gas liquid tank heating system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102519041A (en) * 2011-12-23 2012-06-27 李延新 Numerical control gas burner
CN102519041B (en) * 2011-12-23 2015-09-23 李延新 A kind of numerical control gas burner
CN103557533A (en) * 2013-11-06 2014-02-05 李延新 Numerical control gas burning device
CN103672904A (en) * 2013-12-19 2014-03-26 江阴江顺铝型材成套设备制造有限公司 Gas line of combustor
CN103672904B (en) * 2013-12-19 2016-05-18 江阴江顺铝型材成套设备制造有限公司 A kind of fuel gas pipeline of burner
CN104006384A (en) * 2014-05-22 2014-08-27 李延新 Numerical control fuel oil combustion machine and self-inspection method thereof
CN104101084A (en) * 2014-08-07 2014-10-15 广西铂焰红外线科技有限公司 Direct gas-fired liquid heating device
CN105387614A (en) * 2015-12-03 2016-03-09 上海艾迪迦热能科技有限公司 Pipe-soaked type fuel gas liquid tank heating system

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