CN101576248B - Steam-injection boiler optimization running control system - Google Patents

Steam-injection boiler optimization running control system Download PDF

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Publication number
CN101576248B
CN101576248B CN2009101040128A CN200910104012A CN101576248B CN 101576248 B CN101576248 B CN 101576248B CN 2009101040128 A CN2009101040128 A CN 2009101040128A CN 200910104012 A CN200910104012 A CN 200910104012A CN 101576248 B CN101576248 B CN 101576248B
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China
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judge
pressure
temperature
steam
once
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CN101576248A (en
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张广卿
史钦芳
石红武
张乃峰
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CHONGQING XINYI AUTOMATION SYSTEM ENGINEERING Co Ltd
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CHONGQING XINYI AUTOMATION SYSTEM ENGINEERING Co Ltd
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Abstract

The invention discloses a steam-injection boiler optimization running control system, which comprises a water supply mechanism, a heating hearth, a blasting mechanism, a fuel gas supply mechanism, a fuel supply mechanism, a steam output mechanism and a chimney. The steam-injection boiler optimization running control system is characterized in that a dryness two closed loop control system and an expert self-diagnostics system are stored in a CPU; and the steam-injection boiler optimization running control system has the significant effect of dryness two closed loop control: calculating the dryness to quickly inhibit the state change, electrically conducting the dryness to eliminate the dryness deflection and ensuring the outlet dryness of the boiler to be stable and achieve the standard. The steam-injection boiler optimization running control system automatically adjusts the water feed and fuel amount of the boiler aiming at unstable pressure under a well and optimizes to the best steam-injection dryness. The steam-injection boiler optimization running control system has the advantages of not only quickly inhibiting the dryness change of the boiler, but also being capable of ensuring the steam dryness of the boiler to be accurately controlled for a long period of time. The expert self-diagnostics technology reduces the failure stop, inhibits the explosion and secondary blasting of the pipe of the boiler, improves the burning state and improves the steam-injection economic indexes.

Description

Steam-injection boiler optimization running control system
Technical field
The invention belongs to boiler control technology field, specifically is a kind of steam-injection boiler optimization running control system.
Background technology
The eighties initial stage is introduced external injection boiler technology, and carry out co-production, along with the heavy oil development dynamics further strengthens, the injection boiler demand is increased year by year, injection boiler is progressively production domesticization also, and the injection boiler of production domesticization does not all have essence to improve and improve in furnace type structure, control mode, so the technology of injection boiler still rests on the level at the beginning of 80, can't satisfy the oil play production requirement.
Its quality of steam of the steam flooding of heavy crude heat extraction will directly influence recovery ratio, and quality of steam uses steam quality (carbonated drink separation degree) to weigh usually, and steam quality is low, annotate the vapour weak effect; But the steam quality height easily cause boiler tube overheated (mass dryness fraction is greater than 85%), so the mass dryness fraction of injection boiler is controlled in about 70-80%.
The burner control accuracy is poor, the variation of calorific value of fuel shakiness and steam supply load all causes the steam quality fluctuation, and the safe operation of vapour quality and equipment is annotated in influence; Once the steam quality superelevation easily causes heat transfer to analyse salt, heat transfer deterioration, lead to pernicious security incidents such as booster when serious.
From late nineteen nineties, the domestic steam quality control that begins one's study because of the time lag of injection boiler is big, adopts electricity to lead the on-line measurement mass dryness fraction, and it controls poor effect, has limited the further in-depth of this technology.
When fuel quantity, the thermal efficiency, feed temperature, when steam pressure changes, utilize the boiler thermal output value to extrapolate steam quality, according to the mass dryness fraction that calculates, the input quantity of fuel is controlled, can suppress the boiler mass dryness fraction fast and change the stabilization of export steam quality.
The shortcoming of tradition injection boiler is: the actual value that utilizes the boiler thermal output value to extrapolate steam quality and boiler steam dryness is that certain difference is arranged, and boiler is of a specified duration more service time, the accumulation of uncertain factor is many more, as dust stratification, pipeline scaling etc., and radiation loss increases all can to strengthen and extrapolates the poor of steam quality and actual value, is difficult to realize that boiler steam dryness accurately controls.
Summary of the invention
The purpose of this invention is to provide a kind of steam-injection boiler optimization running control system, both had the advantage that quick inhibition boiler mass dryness fraction changes, can guarantee the accurate control of boiler steam dryness again for a long time.
For achieving the above object, the technical solution used in the present invention is as follows: a kind of steam-injection boiler optimization running control system, comprise water supply mechanism, heating furnace, Blast mechanism, gas supply mechanism, fuel oil organization of supply, steam output mechanism and chimney, wherein water supply mechanism supplies water to heating furnace, Blast mechanism send oxygen to heating furnace, gas supply mechanism supplies combustion gas to heating furnace, the fuel oil organization of supply supplies fuel oil to heating furnace, the steam that heating furnace generates is exported by the steam output mechanism, the flue gas that heating furnace produces is discharged through chimney, and its key is:
Flue-gas temperature sensor and flue gas oxygen content sensor are installed in the exit of described chimney, flow of inlet water meter, inflow temperature meter are installed in described water supply mechanism and lead and detect meter to water power, fuel flowmeter is installed in described fuel oil organization of supply, in described gas supply mechanism, gas meter is installed, the stove water power is installed in described steam output mechanism leads and detect meter;
In described fuel oil organization of supply, the fuel oil electrically-controlled valve is installed, in described gas supply mechanism, gas electromagnetic valve is installed, described fuel oil electrically-controlled valve and gas electromagnetic valve are driven by electric operator, in described Blast mechanism, air blast is installed, this air blast is driven by the blower variable frequency device, in described water supply mechanism feed pump is installed, this feed pump is driven by the feedwater frequency converter;
Described flue-gas temperature sensor, flue gas oxygen content sensor, flow of inlet water meter, inflow temperature meter, fuel flowmeter, gas meter, to water power lead detect meter and stove water power lead the output that detects meter be connected to CPU flue-gas temperature end, flue gas oxygen content end, flow of inlet water end, inflow temperature end, fuel flow end, gas flow end, lead end and the stove water power is led on the end to water power;
The fuel control end of described CPU, air quantity control end, feedwater control end connect the input of described electric operator, blower variable frequency device and feedwater frequency converter respectively;
CPU stores the latent heat of vaporization value Hqh of saturation water under the absolute pressure and the saturation water enthalpy Hbs under the absolute pressure;
Described CPU also is provided with:
The device that is used to begin;
Be used to read and set boiler thermal output η ', set measuring and calculating mass dryness fraction G1, set the device that electricity is led the latent heat of vaporization value Hqh of saturation water under saturation water enthalpy Hbs under mass dryness fraction G3, fuel value Rr, the absolute pressure, the absolute pressure; η ', G1 and G3 set value in advance, are stored in the memory of CPU.Rr, Hbs and Hqh are the material inherent characteristic datas that can record by prior art, are stored in the memory of CPU.
Be used to gather flue-gas temperature T Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device;
Flue-gas temperature T YqRecorded by the flue-gas temperature sensor, flue gas oxygen content O2 is recorded by the flue gas oxygen content sensor, and fuel flow rate Qr is recorded by fuel flowmeter and gas meter, and boiler feed water temperature value T1 is got by the inflow temperature instrumentation, and flow of inlet water Q is got by the flow of inlet water instrumentation.
Be used to calculate the device of boiler feed water enthalpy Hs; Water inlet enthalpy Hs is obtained by T1, is mature technology.
Be used to calculate excess air coefficient Y YqDevice; Y Yq=21/ (21-O2).
Be used to calculate the device of boiler thermal output η;
η＝(1.011+0.0174(Y yq-1))-(3.96×10 -4+3.299(Y yq-1)×10 -4)T yq-0.025
Be used for judging | described setting boiler thermal output η '-boiler thermal output η | whether less than 1.5% device;
If | η '-η | more than or equal to 1.5%, then enter blower variable frequency device (3b) frequency adjustment flow process;
If | η '-η | less than 1.5%, then enter the device that is used to calculate measuring and calculating mass dryness fraction G2;
G2＝((η*Qr*Rr/Qs+Hs-Hbs)/Hqh
Be used for judging | set measuring and calculating mass dryness fraction G1-and calculate measuring and calculating mass dryness fraction G2| whether less than 2.5% device;
If | G1-G2| then enters electric operator (21) control flow fast more than or equal to 2.5%;
If | G1-G2| then enters the variable feedwater conductivity D that is used to gather boiler operatiopn less than 2.5% 1, stove water conductivity D 2Device; D 1Get D by lead the detection instrumentation to water power 2Leading the detection instrumentation by the stove water power gets;
Be used to calculate the device that electricity is led mass dryness fraction G4; G4=(D 2-D 1)/D 2
Being used for judging | the described electricity of setting is led mass dryness fraction G3-measuring and calculating electricity and is led mass dryness fraction G4| whether less than 2.5% device;
If | G3-G4| then returns the described flue-gas temperature T that is used to gather less than 2.5% Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device;
If | G3-G4| then enters the accurate control flow of electric operator more than or equal to 2.5%.
Described blower variable frequency device frequency adjustment flow process comprises:
Be used to judge that described η ' is whether greater than the device of η;
If η ' greater than η, then is used to increase the device of blower variable frequency device frequency; Return the described flue-gas temperature T that is used to gather Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device;
If η ' less than η, then is used to reduce the device of blower variable frequency device frequency; Return the described flue-gas temperature T that is used to gather Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device.
Reach the boiler optimal combustion, make the thermal efficiency high and pollute for a short time, must coefficient of excess air be controlled in the reasonable range, detect the oxygen content in the flue gas, and the character of based on fuel is controlled at oxygen content on the reasonable levels, just can improve the thermal efficiency of boiler operatiopn to greatest extent.
The quick control flow of described electric operator comprises:
Be used to judge that described G1 is whether greater than the device of G2;
If G1 greater than G2, then is used to increase the device of electric operator aperture; Return the described flue-gas temperature T that is used to gather Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device;
If G1 less than G2, then is used to reduce the device of electric operator aperture; Return the described flue-gas temperature T that is used to gather Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device.
When fuel flow rate, the thermal efficiency, feed temperature, when steam pressure changes, the outlet steam quality changes at once, by regulating the boiler oil amount of feeding, utilize the boiler thermal output value to extrapolate steam quality, input quantity to fuel is controlled, can suppress the boiler mass dryness fraction fast and change, the stabilization of export steam quality, fast the control flow components utilising conventional art advantage of response fast.
The accurate control flow of described electric operator comprises:
Be used to judge that described G3 is whether greater than the device of G4;
If G3 greater than G4, then is used to increase the device of electric operator aperture;
10 minutes device of wait is used to delay time;
If G3 less than G4, then is used to reduce the device of electric operator aperture;
Described 10 minutes the device of wait that is used to delay time; Return the described variable feedwater conductivity D that is used to gather boiler operatiopn 1, stove water conductivity D 2Device.
It is the highest that the measuring and calculating electricity is led the degree of accuracy of mass dryness fraction G4, but its response speed is slow, therefore, and according to the time-delay of boiler concrete condition consideration 10 minutes or other periods, real work situation that just can the most correct acquisition boiler, accurately control flow has remedied the defective of the quick control flow degree of accuracy.
Described water supply mechanism also is provided with the water water-to-water heat exchanger, the cold water inlet of this water water-to-water heat exchanger communicates with described boiler feedwater delivery side of pump, the cooling water outlet of this water water-to-water heat exchanger communicates with the interior inlet to overflow pipe of described chimney, this outlet to overflow pipe communicates with the hot water inlet of described water water-to-water heat exchanger, and the hot water outlet of this water water-to-water heat exchanger links to each other with described heating furnace;
The lubricating oil pressure meter is installed on described boiler feed pump, in the porch of this boiler feed pump the pump inlet pressure meter is installed, the pump discharge pressure meter is installed in the exit of described boiler feed pump and described leading to water power detected meter, described flow of inlet water meter and inflow temperature meter also are installed on the pipeline between described boiler feed pump and the water water-to-water heat exchanger;
The lubricating oil pressure meter detects the lubricating oil pressure of feed pump, and send to CPU, the pump inlet pressure meter detects the inlet pressure of feed pump, and send to CPU, pump discharge pressure meter (1d) detects the outlet pressure of feed pump, and sending to CPU, flow of inlet water meter and inflow temperature meter transmission flow of inlet water and inflow temperature are to CPU.
At the cooling water outlet of described water water-to-water heat exchanger and describedly be equipped with going into thermometer on to the pipeline between the inlet of overflow pipe; Send going into temperature going into thermometer to CPU.
Described to overflow pipe outlet and the pipeline between the hot water inlet of described water water-to-water heat exchanger on be equipped with going out thermometer; Send going out temperature going out thermometer to CPU.
On the hot water outlet of described water water-to-water heat exchanger and the pipeline between the described heating furnace, spoke is installed and goes into thermometer.Spoke is gone into thermometer transmission spoke and is gone into temperature to CPU.
Burner and boiler tube are installed in the described heating furnace, and wherein the burner door is provided with the switch detector, and the output of this switch detector is connected with the burner door test side of described CPU; Whether the switch detector detects burner and opens.
The inlet of described boiler tube links to each other with described water supply mechanism, and the outlet of boiler tube communicates with described steam output mechanism, and the tube wall temperature meter is installed on this boiler tube, and the output of this tube wall temperature meter is connected with the tube wall temperature end of described CPU;
Between the outlet of described boiler tube and burner the atomizing pipeline is installed, on this atomizing pipeline the atomizing pressure meter is installed, the output of this atomizing pressure meter is connected with the atomizing pressure end of described CPU.
The pipeline of described steam output mechanism is provided with vapour tension thermometer and vaporometer, and the output of described vapour tension thermometer is connected with the vapor (steam) temperature end of described CPU, and the output of described vaporometer is connected with the steam pressure end of described CPU;
Also be provided with steam-water separator on the pipeline of this steam output mechanism, this steam-water separator is installed described stove water power and is led the detection meter.The stove water power is led and is detected meter transmission stove water conductivity to described CPU.
The exit of described air blast is equipped with blast air gauge, and the output of this blast air gauge is connected with the blast pressure end of described CPU.
On the tracheae of described gas supply mechanism gaseous-pressure meter and fuel gas temperature meter are installed, the output of this gaseous-pressure meter is connected with the gaseous-pressure end of described CPU, and the output of fuel gas temperature meter is connected with the fuel gas temperature end of described CPU.
Fuel pressure gauge and fuel oil temperature meter are installed on the oil pipe of described fuel oil organization of supply, the fuel pressure end of the output of described fuel pressure gauge and described CPU, the output of fuel oil temperature meter is connected with the fuel oil temperature end of described CPU.
Also be provided with the instrument air pipe line, this instrument is with being equipped with the instrument air pressure gage in the air pipe line, and this instrument is connected with the air pressure end with the instrument of described CPU with the output of air pressure gage.
Described CPU also is provided with:
The device that is used to begin;
Be used to gather the device of boiler operatiopn variable;
Be used to judge the device that the boiler feed water flow is whether low; Relatively whether the boiler feed water flow is lower than the artificial in advance feed water flow value of setting.
If flow of inlet water is low, the wait t1 device of second is used to delay time; Be used for judging once more the device that the boiler feed water flow is whether low; If judge that once more the boiler feed water flow is low, then be used to export the device of blowing out, warning; If judge that once more the boiler feed water flow is normal, then be used to judge the device that steam pressure is whether low;
If judge that first flow of inlet water is normal, then be directly used in the device of judging that steam pressure is whether low; Relatively whether boiler pressure is lower than the artificial in advance steam pressure lower limit of setting.
If steam pressure is low, the wait t2 device of second is used to delay time; Be used for judging once more the device that steam pressure is whether low; If judge that once more steam pressure is low, then be used for output alarm, device shown, return the described device that is used to gather the boiler operatiopn variable; If judge that once more steam pressure is not low, then be used to judge the device that steam pressure is whether high;
If judge that first steam pressure is not low, then be directly used in the device of judging that steam pressure is whether high;
Relatively whether boiler pressure is higher than the artificial in advance steam pressure higher limit of setting.
If the steam pressure height, the wait t3 device of second is used to delay time; Be used for judging once more the device that steam pressure is whether high; If judge the steam pressure height once more, then be used to export the device of blowing out, warning; If judge that once more steam pressure is normal, then be used to judge the device that vapor (steam) temperature is whether high;
If judge that first steam pressure is normal, then be directly used in the device of judging that vapor (steam) temperature is whether high;
Relatively whether boiler steam temperature is higher than the artificial in advance vapor (steam) temperature higher limit of setting.
If the vapor (steam) temperature height, the wait t4 device of second is used to delay time; Be used for judging once more the device that vapor (steam) temperature is whether high; If judge the vapor (steam) temperature height once more, then be used to export the device of blowing out, warning; If judge that once more vapor (steam) temperature is normal, then be used to judge the device that tube wall temperature is whether high;
If judge that first vapor (steam) temperature is normal, then be directly used in the device of judging that tube wall temperature is whether high;
Relatively whether the boiler tube wall temperature is higher than the artificial in advance tube wall temperature higher limit of setting.
If the tube wall temperature height, the wait t5 device of second is used to delay time; Be used for judging once more the device that tube wall temperature is whether high; If judge the tube wall temperature height once more, then be used to export the device of blowing out, warning; If judge that once more tube wall temperature is normal, then be used to judge the device that the burner temperature is whether high;
If judge that first tube wall temperature is normal, then be directly used in the device of judging that the burner temperature is whether high;
Relatively whether the boiler combustion actuator temperature is higher than the artificial in advance burner temperature upper limit of setting.The burner thermometer is installed, for CPU provides the burner temperature value on the burner.
If burner temperature height, the wait t6 device of second is used to delay time; Be used for judging once more the device that the burner temperature is whether high; If judge burner temperature height once more, then be used for output alarm, device shown; If judge that once more the burner temperature is normal, then be used to judge the device that fuel oil temperature is whether high;
If judge that first the burner temperature is normal, then be directly used in the device of judging that fuel oil temperature is whether high;
Relatively whether fuel oil temperature is higher than the artificial in advance fuel oil temperature higher limit of setting.The fuel oil temperature meter is installed on the oil pipe of fuel oil organization of supply, and fuel oil temperature is counted CPU the fuel oil temperature value is provided.
If the fuel oil temperature height, the wait t7 device of second is used to delay time; Be used for judging once more the device that fuel oil temperature is whether high; If judge the fuel oil temperature height once more, then be used for output alarm, device shown; If judge that once more fuel oil temperature is not high, then be used to judge the device that fuel oil temperature is whether low;
If judge that first fuel oil temperature is not high, then be directly used in the device of judging that fuel oil temperature is whether low;
Relatively whether fuel oil temperature is lower than the artificial in advance fuel oil temperature lower limit of setting.
If fuel oil temperature is low, the wait t8 device of second is used to delay time; Be used for judging once more the device that fuel oil temperature is whether low; If judge that once more fuel oil temperature is low, then be used for output alarm, device shown; If judge that once more fuel oil temperature is normal, then be used to judge the device that flue-gas temperature is whether high;
If judge that first fuel oil temperature is normal, then be directly used in the device of judging that flue-gas temperature is whether high;
Relatively whether flue-gas temperature is higher than the artificial in advance flue-gas temperature higher limit of setting.
If the flue-gas temperature height, the wait t9 device of second is used to delay time; Be used for judging once more the device that flue-gas temperature is whether high; If judge the flue-gas temperature height once more, then be used for output alarm, device shown; If judge that once more flue-gas temperature is normal, then be used to judge the device that atomizing pressure is whether low;
If judge that first flue-gas temperature is normal, then be directly used in the device of judging that atomizing pressure is whether low;
Relatively whether atomizing pressure is lower than the artificial in advance atomizing pressure lower limit of setting.
If atomizing pressure is low, the wait t10 device of second is used to delay time; Be used for judging once more the device that atomizing pressure is whether low; If judge that once more atomizing pressure is low, then be used for output alarm, device shown; If judge that once more atomizing pressure is normal, then be used to judge the device that entrance of water-supplying pump pressure is whether low;
If judge that first atomizing pressure is normal, then be used to judge the device that entrance of water-supplying pump pressure is whether low;
Relatively whether entrance of water-supplying pump pressure is lower than the artificial in advance entrance of water-supplying pump low pressure limit value of setting.
If entrance of water-supplying pump pressure is low, the wait t11 device of second is used to delay time; Be used for judging once more the device that entrance of water-supplying pump pressure is whether low; If judge that once more entrance of water-supplying pump pressure is low, then be used to export the device of blowing out, warning; If judge that once more entrance of water-supplying pump pressure is normal, be used to then to judge that whether low instrument with air pressure device;
If judge that first entrance of water-supplying pump pressure is normal, then be directly used in and judge that whether low instrument with air pressure device;
Whether comparator is lower than the artificial in advance instrument air pressure value of setting with air pressure.
If instrument is low with air pressure, the wait t12 device of second is used to delay time; Be used for judging once more that whether low instrument with air pressure device; If judge that once more instrument is low with air pressure, then be used for output alarm, device shown; If judge that once more instrument is normal with air pressure, then be used to judge the device that gaseous-pressure is whether low;
If judge that first instrument is normal with air pressure, then be directly used in the device of judging that gaseous-pressure is whether low;
Relatively whether gaseous-pressure is lower than the artificial in advance gaseous-pressure value of setting.
If gaseous-pressure is low, the wait t13 device of second is used to delay time; Be used for judging once more the device that gaseous-pressure is whether low; If judge that once more gaseous-pressure is low, then be used for output alarm, device shown; If judge that once more gaseous-pressure is normal, be used to then to judge that pump discharge pressure-steam pressure is whether greater than the device of 2MP;
If judge that first gaseous-pressure is normal, then be directly used in and judge that pump discharge pressure-steam pressure is whether greater than the device of 2MP;
If pump discharge pressure-steam pressure greater than 2MP, then is used for output alarm, device shown;
If pump discharge pressure-steam pressure is not more than 2MP, be used to then to judge that steam pressure-pump discharge pressure is whether less than the device of 4MP;
If steam pressure-pump discharge pressure is not less than 4MP, the wait t14 device of second is used to delay time; Be used for judging once more that steam pressure-pump discharge pressure is whether less than the device of 4MP; If judge that once more steam pressure-pump discharge pressure is not less than 4MP, then be used to export the device of blowing out, warning; If judge steam pressure-pump discharge pressure once more, then be used to judge to going out temperature-to going into temperature whether less than 50 ℃ device less than 4MP;
If judge steam pressure-pump discharge pressure first, then be directly used in judgement to going out temperature-to going into temperature whether less than 50 ℃ device less than 4MP;
If to going out temperature-, then be used for output alarm, device shown to going into temperature less than 50 ℃;
If to going out temperature-be not less than 50 ℃, be used to then to judge that vapor (steam) temperature-spoke goes into temperature whether less than 150 ℃ device to going into temperature;
If vapor (steam) temperature-spoke is gone into temperature less than 150 ℃, then be used for output alarm, device shown;
Be not less than 150 ℃ if vapor (steam) temperature-spoke is gone into temperature, be used to then to judge that described setting boiler thermal output η '-boiler thermal output η is whether greater than 10% device;
If set boiler thermal output η '-boiler thermal output η greater than 10%, then be used for output alarm, device shown;
Be not more than 10% if set boiler thermal output η '-boiler thermal output η, be used to then to judge that the unit of fuel factor of created gase is whether less than 16 device; Unit of fuel factor of created gase: the quality of steam that fuel produced of a mass unit.Fuel mass and quality of steam can be tried to achieve by flow velocity and autologous density.
If the unit of fuel factor of created gase less than 16, then is used for output alarm, device shown;
If the unit of fuel factor of created gase is not less than 16, then be used to the device of judging whether boiler stops working; Whether flame-out boiler judgment mode more, as vapor (steam) temperature decline rapidly, heating furnace, flue-gas temperature descend rapidly, flue gas flow descends degradation rapidly, all is mature technology.
If boiler is flame-out, then be used to export the device of blowing out, warning;
If boiler is not flame-out, then be used to judge whether normally device of boiler power supply; Power supply detects based on the magnitude of current, magnitude of voltage and detects, and belongs to mature technology.
If the boiler power supply is undesired, then be used to export the device of blowing out, warning;
If the boiler power supply is normal, then be used to judge the device that described blast pressure is whether low; Blow rate required lower limit when relatively whether blast pressure is lower than the air blast operate as normal.
If blast pressure is low, the wait t15 device of second is used to delay time; Be used for judging once more the device that blast pressure is whether low; If judge that once more blast pressure is low, then be used to export the device of blowing out, warning; If judge that once more blast pressure is normal, then be used to judge the device that lubricating oil pressure is whether low;
If judge that first blast pressure is normal, then be directly used in the device of judging that lubricating oil pressure is whether low;
Relatively whether lubricating oil pressure is lower than the artificial in advance lubricating oil pressure value of setting.
If lubricating oil pressure is low, the wait t16 device of second is used to delay time; Be used for judging once more the device that lubricating oil pressure is whether low; If judge that once more lubricating oil pressure is low, then be used to export the device of blowing out, warning; If judge that once more lubricating oil pressure is normal, then be used to the device of judging whether the burner door is opened;
If judge that first lubricating oil pressure is normal, then is directly used in the device of judging whether the burner door is opened;
If the burner door is opened, the wait t17 device of second is used to delay time; Be used for the device of judging once more whether the burner door is opened; Open if judge the burner door once more, then be used to export the device of blowing out, warning; Close if judge the burner door once more, then return the described device that is used to gather the boiler operatiopn variable;
Close if judge the burner door first, then directly return the described device that is used to gather the boiler operatiopn variable.
Remarkable result of the present invention is: the two closed-loop controls of mass dryness fraction: the calculating mass dryness fraction is used for the quick inhibition to state variation, and electricity is led mass dryness fraction and eliminated the mass dryness fraction deviation, guarantees boiler export mass dryness fraction stably reaching standard.At unsettled bottom pressure, regulate the feedwater and the fuel quantity of boiler automatically, optimizing is to best notes vapour mass dryness fraction.Both had the advantage that quick inhibition boiler mass dryness fraction changes, and can guarantee the accurate control of boiler steam dryness again for a long time.Expert's self-diagnosis technology: reduce the fault blowing out, check the generator tube blast and secondary fires, improves fired state, improves and annotate the vapour economic indicator.
Description of drawings
Fig. 1 is the structured flowchart of injection boiler;
Fig. 2 is the structured flowchart of electric part of the present invention;
Fig. 3 is a system construction drawing of the present invention;
Fig. 4 is the two closed-loop control flow charts of mass dryness fraction;
Fig. 5 is expert's self diagnosis control flow chart.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
As shown in Figure 1, 2, 3, the present invention is a kind of steam-injection boiler optimization running control system, comprise water supply mechanism 1, heating furnace 2, Blast mechanism 3, gas supply mechanism 4, fuel oil organization of supply 5, steam output mechanism 6 and chimney 7, wherein water supply mechanism 1 supplies water to heating furnace 2, Blast mechanism 3 send oxygen to heating furnace 2, gas supply mechanism 4 supplies combustion gas to heating furnace 2, fuel oil organization of supply 5 supplies fuel oil to heating furnace 2, the steam that heating furnace 2 generates is by 6 outputs of steam output mechanism, the flue gas that heating furnace 2 produces is discharged through chimney 7, and its key is:
Flue-gas temperature sensor 7a and flue gas oxygen content sensor 7b are installed in the exit of described chimney 7, flow of inlet water meter 1e, inflow temperature meter 1f are installed in described water supply mechanism 1 and lead detection meter 1i to water power, fuel flowmeter 5a is installed in described fuel oil organization of supply 5, in described gas supply mechanism 4, gas meter 4a is installed, the stove water power is installed in described steam output mechanism 6 leads and detect meter 6d;
In described fuel oil organization of supply 5, fuel oil electrically-controlled valve 14 is installed, in described gas supply mechanism 4, gas electromagnetic valve 15 is installed, described fuel oil electrically-controlled valve 14 and gas electromagnetic valve 15 are driven by electric operator 21, in described Blast mechanism 3, air blast 3a is installed, this air blast 3a is driven by blower variable frequency device 3b, in described water supply mechanism 1 feed pump 1a is installed, this feed pump 1a is driven by feedwater frequency converter 1j;
Described flue-gas temperature sensor 7a, flue gas oxygen content sensor 7b, flow of inlet water meter 1e, inflow temperature meter 1f, fuel flowmeter 5a, gas meter 4a, to water power lead detect meter 1i and stove water power lead the output that detects meter 6d be connected to CPU20 flue-gas temperature end, flue gas oxygen content end, flow of inlet water end, inflow temperature end, fuel flow end, gas flow end, lead end and the stove water power is led on the end to water power;
The fuel control end of described CPU20, air quantity control end, feedwater control end connect the input of described electric operator 21, blower variable frequency device 3b and feedwater frequency converter 1j respectively;
CPU20 stores the latent heat of vaporization value Hqh of saturation water under the absolute pressure and the saturation water enthalpy Hbs under the absolute pressure;
As shown in Figure 4, described CPU20 also is provided with:
The device that is used to begin;
Be used to read and set boiler thermal output η ', set measuring and calculating mass dryness fraction G1, set the device that electricity is led the latent heat of vaporization value Hqh of saturation water under saturation water enthalpy Hbs under mass dryness fraction G3, fuel value Rr, the absolute pressure, the absolute pressure; η ', G1 and G3 set value in advance, are stored in the memory of CPU20.Rr, Hbs and Hqh are the material inherent characteristic datas that can record by prior art, are stored in the memory of CPU20.
Be used to gather flue-gas temperature T Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device;
Flue-gas temperature T Yq7a records by the flue-gas temperature sensor, flue gas oxygen content O2 is recorded by flue gas oxygen content sensor 7b, fuel flow rate Qr is recorded by fuel flowmeter 5a and gas meter 4a, and boiler feed water temperature value T1 is recorded by inflow temperature meter 1f, and flow of inlet water Q is recorded by flow of inlet water meter 1e.
Be used to calculate the device of boiler feed water enthalpy Hs; Hs is obtained by Q and T1, is mature technology.
Be used to calculate excess air coefficient Y YqDevice; Y Yq=21/ (21-O2).
Be used to calculate the device of boiler thermal output η;
η＝(1.011+0.0174(Y yq-1))-(3.96×10 -4+3.299(Y yq-1)×10 -4)T yq-0.025
Whether the absolute value that is used to judge described setting boiler thermal output η '-boiler thermal output η is less than 1.5% device;
If the absolute value of η '-η, then enters blower variable frequency device 3b frequency adjustment flow process more than or equal to 1.5%;
If the absolute value of η '-η then enters the device that is used to calculate measuring and calculating mass dryness fraction G2 less than in 1.5%;
G2＝((η*Qr*Rr/Qs+Hs-Hbs)/Hqh
Be used to judge that absolute value that described setting measuring and calculating mass dryness fraction G1-calculates measuring and calculating mass dryness fraction G2 is whether less than 2.5% device;
If | G1-G2| then enters electric operator (21) control flow fast more than or equal to 2.5%;
If | G1-G2| then enters the variable feedwater conductivity D that is used to gather boiler operatiopn less than 2.5% 1, stove water conductivity D 2Device; D 1Record D by lead detection meter 1i to water power 2 Leading detection meter 6d by the stove water power records;
Be used to calculate the device that electricity is led mass dryness fraction G4; G4=(D 2-D 1)/D 2
Being used for judging | the described electricity of setting is led mass dryness fraction G3-measuring and calculating electricity and is led mass dryness fraction G4| whether less than 2.5% device;
If | G3-G4| then returns the described flue-gas temperature T that is used to gather less than 2.5% Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device;
If | G3-G4| then enters electric operator 21 accurate control flows more than or equal to 2.5%.
Described blower variable frequency device 3b frequency adjustment flow process comprises:
Be used to judge that described η ' is whether greater than the device of η;
If η ' greater than η, then is used to increase the device of blower variable frequency device 3b frequency; Return the described flue-gas temperature T that is used to gather Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device;
If η ' less than η, then is used to reduce the device of blower variable frequency device 3b frequency; Return the described flue-gas temperature T that is used to gather Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device.
Reach the boiler optimal combustion, make the thermal efficiency high and pollute for a short time, must coefficient of excess air be controlled in the reasonable range, detect the oxygen content in the flue gas, and the character of based on fuel is controlled at oxygen content on the reasonable levels, just can improve the thermal efficiency of boiler operatiopn to greatest extent.
Described electric operator 21 quick control flows comprise:
Be used to judge that described G1 is whether greater than the device of G2;
If G1 greater than G2, then is used to increase the device of electric operator 21 apertures; Return the described flue-gas temperature T that is used to gather Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device;
If G1 less than G2, then is used to reduce the device of electric operator 21 apertures; Return the described flue-gas temperature T that is used to gather Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device.
When fuel flow rate, the thermal efficiency, feed temperature, when steam pressure changes, the outlet steam quality changes at once, by regulating the boiler oil amount of feeding, utilize the boiler thermal output value to extrapolate steam quality, input quantity to fuel is controlled, can suppress the boiler mass dryness fraction fast and change, the stabilization of export steam quality, fast the control flow components utilising conventional art advantage of response fast.
Described electric operator 21 accurate control flows comprise:
Be used to judge that described G3 is whether greater than the device of G4;
If G3 greater than G4, then is used to increase the device of electric operator 21 apertures;
10 minutes device of wait is used to delay time;
If G3 less than G4, then is used to reduce the device of electric operator 21 apertures;
Described 10 minutes the device of wait that is used to delay time; Return the described variable feedwater conductivity D that is used to gather boiler operatiopn 1, stove water conductivity D 2Device.
It is the highest that the measuring and calculating electricity is led the degree of accuracy of mass dryness fraction G4, but its response speed is slow, therefore, and according to the time-delay of boiler concrete condition consideration 10 minutes or other periods, real work situation that just can the most correct acquisition boiler, accurately control flow has remedied the defective of the quick control flow degree of accuracy.
Shown in Fig. 2,3, described water supply mechanism 1 also is provided with water water-to-water heat exchanger 1b, the cold water inlet of this water water-to-water heat exchanger 1b communicates with the output of described boiler feed pump 1a, the cooling water outlet of this water water-to-water heat exchanger 1b communicates with described chimney 7 interior inlets to overflow pipe 7c, this outlet to overflow pipe 7c communicates with the hot water inlet of described water water-to-water heat exchanger 1b, and the hot water outlet of this water water-to-water heat exchanger 1b links to each other with described heating furnace 2;
Lubricating oil pressure meter 1k is installed on described boiler feed pump 1a, in the porch of this boiler feed pump 1a pump inlet pressure meter 1c is installed, pump discharge pressure meter 1d is installed in the exit of described boiler feed pump 1a and described leading to water power detected meter 1i, described flow of inlet water meter 1e and inflow temperature meter 1f also are installed on the pipeline between described boiler feed pump 1a and the water water-to-water heat exchanger 1b;
Lubricating oil pressure meter 1k detects the lubricating oil pressure of feed pump 1a, and send to CPU20, pump inlet pressure meter 1c detects the inlet pressure of feed pump 1a, and send to CPU20, pump discharge pressure meter 1d detects the outlet pressure of feed pump 1a, and sending to CPU20, flow of inlet water meter 1e and inflow temperature meter 1f transmission flow of inlet water and inflow temperature are to CPU20.
At the cooling water outlet of described water water-to-water heat exchanger 1b and describedly be equipped with going into thermometer 1L on to the pipeline between the inlet of overflow pipe 7c; Send going into temperature going into thermometer 1L to CPU20.
Described to overflow pipe 7c outlet and the pipeline between the hot water inlet of described water water-to-water heat exchanger 1b on be equipped with going out thermometer 1g; Send going out temperature going out thermometer 1g to CPU20.
On the hot water outlet of described water water-to-water heat exchanger 1b and the pipeline between the described heating furnace 2, spoke is installed and goes into thermometer 1h.Spoke is gone into thermometer 1h transmission spoke and is gone into temperature to CPU20.
In the described heating furnace 2 burner and boiler tube are installed, wherein the burner door is provided with switch detector 2a, and the output of this switch detector 2a is connected with the burner door test side of described CPU20; Whether switch detector 2a detects burner and opens.
The inlet of described boiler tube links to each other with described water supply mechanism 1, and the outlet of boiler tube communicates with described steam output mechanism 6, and tube wall temperature meter 2b is installed on this boiler tube, and the output of this tube wall temperature meter 2b is connected with the tube wall temperature end of described CPU20;
Between the outlet of described boiler tube and burner the atomizing pipeline is installed, atomizing pressure meter 2c is installed on this atomizing pipeline, the output of this atomizing pressure meter 2c is connected with the atomizing pressure end of described CPU20.
The pipeline of described steam output mechanism 6 is provided with vapour tension thermometer 6a and vaporometer 6b, the output of described vapour tension thermometer 6a is connected with the vapor (steam) temperature end of described CPU20, and the output of described vaporometer 6b is connected with the steam pressure end of described CPU20;
Also be provided with steam-water separator 6c on the pipeline of this steam output mechanism 6, this steam-water separator 6c installs described stove water power and leads detection meter 6d.The stove water power is led and is detected meter 6d transmission stove water conductivity to described CPU20.
The exit of described air blast 3a is equipped with blast air gauge 3c, and the output of this blast air gauge 3c is connected with the blast pressure end of described CPU20.
On the tracheae of described gas supply mechanism 4 gaseous-pressure meter 4b and fuel gas temperature meter 4c are installed, the output of this gaseous-pressure meter 4b is connected with the gaseous-pressure end of described CPU20, and the output of fuel gas temperature meter 4c is connected with the fuel gas temperature end of described CPU20.
Fuel pressure gauge 5b and fuel oil temperature meter 5c are installed on the oil pipe of described fuel oil organization of supply 5, the fuel pressure end of the output of described fuel pressure gauge 5b and described CPU20, the output of fuel oil temperature meter 5c is connected with the fuel oil temperature end of described CPU20.
Also be provided with instrument air pipe line 8, this instrument is with being equipped with instrument air pressure gage 8a in the air pipe line 8, and this instrument is connected with the air pressure end with the instrument of described CPU20 with the output of air pressure gage 8a.
As shown in Figure 5, described CPU20 also is provided with:
The device that is used to begin;
Be used to gather the device of boiler operatiopn variable;
Be used to judge the device that the boiler feed water flow is whether low; Relatively whether the boiler feed water flow is lower than the artificial in advance feed water flow value of setting.
If flow of inlet water is low, the wait t1 device of second is used to delay time; Be used for judging once more the device that the boiler feed water flow is whether low; If judge that once more the boiler feed water flow is low, then be used to export the device of blowing out, warning; If judge that once more the boiler feed water flow is normal, then be used to judge the device that steam pressure is whether low;
If judge that first flow of inlet water is normal, then be directly used in the device of judging that steam pressure is whether low; Relatively whether boiler pressure is lower than the artificial in advance steam pressure lower limit of setting.
If steam pressure is low, the wait t2 device of second is used to delay time; Be used for judging once more the device that steam pressure is whether low; If judge that once more steam pressure is low, then be used for output alarm, device shown, return the described device that is used to gather the boiler operatiopn variable; If judge that once more steam pressure is not low, then be used to judge the device that steam pressure is whether high;
If judge that first steam pressure is not low, then be directly used in the device of judging that steam pressure is whether high;
Relatively whether boiler pressure is higher than the artificial in advance steam pressure higher limit of setting.
If the steam pressure height, the wait t3 device of second is used to delay time; Be used for judging once more the device that steam pressure is whether high; If judge the steam pressure height once more, then be used to export the device of blowing out, warning; If judge that once more steam pressure is normal, then be used to judge the device that vapor (steam) temperature is whether high;
If judge that first steam pressure is normal, then be directly used in the device of judging that vapor (steam) temperature is whether high;
Relatively whether boiler steam temperature is higher than the artificial in advance vapor (steam) temperature higher limit of setting.
If the vapor (steam) temperature height, the wait t4 device of second is used to delay time; Be used for judging once more the device that vapor (steam) temperature is whether high; If judge the vapor (steam) temperature height once more, then be used to export the device of blowing out, warning; If judge that once more vapor (steam) temperature is normal, then be used to judge the device that tube wall temperature is whether high;
If judge that first vapor (steam) temperature is normal, then be directly used in the device of judging that tube wall temperature is whether high;
Relatively whether the boiler tube wall temperature is higher than the artificial in advance tube wall temperature higher limit of setting.
If the tube wall temperature height, the wait t5 device of second is used to delay time; Be used for judging once more the device that tube wall temperature is whether high; If judge the tube wall temperature height once more, then be used to export the device of blowing out, warning; If judge that once more tube wall temperature is normal, then be used to judge the device that the burner temperature is whether high;
If judge that first tube wall temperature is normal, then be directly used in the device of judging that the burner temperature is whether high;
Relatively whether the boiler combustion actuator temperature is higher than the artificial in advance burner temperature upper limit of setting.The burner thermometer is installed, for CPU20 provides the burner temperature value on the burner.
If burner temperature height, the wait t6 device of second is used to delay time; Be used for judging once more the device that the burner temperature is whether high; If judge burner temperature height once more, then be used for output alarm, device shown; If judge that once more the burner temperature is normal, then be used to judge the device that fuel oil temperature is whether high;
If judge that first the burner temperature is normal, then be directly used in the device of judging that fuel oil temperature is whether high;
Relatively whether fuel oil temperature is higher than the artificial in advance fuel oil temperature higher limit of setting.The fuel oil temperature meter is installed on the oil pipe of fuel oil organization of supply 5, and fuel oil temperature is counted CPU20 the fuel oil temperature value is provided.
If the fuel oil temperature height, the wait t7 device of second is used to delay time; Be used for judging once more the device that fuel oil temperature is whether high; If judge the fuel oil temperature height once more, then be used for output alarm, device shown; If judge that once more fuel oil temperature is not high, then be used to judge the device that fuel oil temperature is whether low;
If judge that first fuel oil temperature is not high, then be directly used in the device of judging that fuel oil temperature is whether low;
Relatively whether fuel oil temperature is lower than the artificial in advance fuel oil temperature lower limit of setting.
If fuel oil temperature is low, the wait t8 device of second is used to delay time; Be used for judging once more the device that fuel oil temperature is whether low; If judge that once more fuel oil temperature is low, then be used for output alarm, device shown; If judge that once more fuel oil temperature is normal, then be used to judge the device that flue-gas temperature is whether high;
If judge that first fuel oil temperature is normal, then be directly used in the device of judging that flue-gas temperature is whether high;
Relatively whether flue-gas temperature is higher than the artificial in advance flue-gas temperature higher limit of setting.
If the flue-gas temperature height, the wait t9 device of second is used to delay time; Be used for judging once more the device that flue-gas temperature is whether high; If judge the flue-gas temperature height once more, then be used for output alarm, device shown; If judge that once more flue-gas temperature is normal, then be used to judge the device that atomizing pressure is whether low;
If judge that first flue-gas temperature is normal, then be directly used in the device of judging that atomizing pressure is whether low;
Relatively whether atomizing pressure is lower than the artificial in advance atomizing pressure lower limit of setting.
If atomizing pressure is low, the wait t10 device of second is used to delay time; Be used for judging once more the device that atomizing pressure is whether low; If judge that once more atomizing pressure is low, then be used for output alarm, device shown; If judge that once more atomizing pressure is normal, then be used to judge the device that entrance of water-supplying pump pressure is whether low;
If judge that first atomizing pressure is normal, then be directly used in the device of judging that feed pump 1a inlet pressure is whether low;
Relatively whether feed pump 1a inlet pressure is lower than the artificial in advance feed pump 1a inlet pressure lower limit of setting.
If feed pump 1a inlet pressure is low, the wait t11 device of second is used to delay time; Be used for judging once more the device that feed pump 1a inlet pressure is whether low; If judge that once more feed pump 1a inlet pressure is low, then be used to export the device of blowing out, warning; If judge that once more feed pump 1a inlet pressure is normal, be used to then to judge that whether low instrument with air pressure device;
If judge that first feed pump 1a inlet pressure is normal, then be directly used in and judge that whether low instrument with air pressure device;
Whether comparator is lower than the artificial in advance instrument air pressure value of setting with air pressure.
If instrument is low with air pressure, the wait t12 device of second is used to delay time; Be used for judging once more that whether low instrument with air pressure device; If judge that once more instrument is low with air pressure, then be used for output alarm, device shown; If judge that once more instrument is normal with air pressure, then be used to judge the device that gaseous-pressure is whether low;
If judge that first instrument is normal with air pressure, then be directly used in the device of judging that gaseous-pressure is whether low;
Relatively whether gaseous-pressure is lower than the artificial in advance gaseous-pressure value of setting.
If gaseous-pressure is low, the wait t13 device of second is used to delay time; Be used for judging once more the device that gaseous-pressure is whether low; If judge that once more gaseous-pressure is low, then be used for output alarm, device shown; If judge that once more gaseous-pressure is normal, be used to then to judge that pump discharge pressure-steam pressure is whether greater than the device of 2MP;
If judge that first gaseous-pressure is normal, then be directly used in and judge that pump discharge pressure-steam pressure is whether greater than the device of 2MP;
If pump discharge pressure-steam pressure greater than 2MP, then is used for output alarm, device shown;
If pump discharge pressure-steam pressure is not more than 2MP, be used to then to judge that steam pressure-pump discharge pressure is whether less than the device of 4MP;
If steam pressure-pump discharge pressure is not less than 4MP, the wait t14 device of second is used to delay time; Be used for judging once more that steam pressure-pump discharge pressure is whether less than the device of 4MP; If judge that once more steam pressure-pump discharge pressure is not less than 4MP, then be used to export the device of blowing out, warning; If judge steam pressure-pump discharge pressure once more, then be used to judge to going out temperature-to going into temperature whether less than 50 ℃ device less than 4MP;
If judge steam pressure-pump discharge pressure first, then be directly used in judgement to going out temperature-to going into temperature whether less than 50 ℃ device less than 4MP;
If to going out temperature-, then be used for output alarm, device shown to going into temperature less than 50 ℃;
If to going out temperature-be not less than 50 ℃, be used to then to judge that vapor (steam) temperature-spoke goes into temperature whether less than 150 ℃ device to going into temperature;
If vapor (steam) temperature-spoke is gone into temperature less than 150 ℃, then be used for output alarm, device shown;
Be not less than 150 ℃ if vapor (steam) temperature-spoke is gone into temperature, be used to then to judge that described setting boiler thermal output η '-boiler thermal output η is whether greater than 10% device;
If set boiler thermal output η '-boiler thermal output η greater than 10%, then be used for output alarm, device shown;
Be not more than 10% if set boiler thermal output η '-boiler thermal output η, be used to then to judge that the unit of fuel factor of created gase is whether less than 16 device; Unit of fuel factor of created gase: the quality of steam that fuel produced of a mass unit.Fuel mass and quality of steam can be tried to achieve by flow velocity and autologous density.
If the unit of fuel factor of created gase less than 16, then is used for output alarm, device shown;
If the unit of fuel factor of created gase is not less than 16, then be used to the device of judging whether boiler stops working; Whether flame-out boiler judgment mode more, as vapor (steam) temperature descend rapidly, heating furnace 2, flue-gas temperature descend rapidly, flue gas flow descends degradation rapidly, all is mature technology.
If boiler is flame-out, then be used to export the device of blowing out, warning;
If boiler is not flame-out, then be used to judge whether normally device of boiler power supply; Power supply detects based on the magnitude of current, magnitude of voltage and detects, and belongs to mature technology.
If the boiler power supply is undesired, then be used to export the device of blowing out, warning;
If the boiler power supply is normal, then be used to judge the device that described blast pressure is whether low; Blow rate required lower limit when relatively whether blast pressure is lower than the air blast operate as normal.
If blast pressure is low, the wait t15 device of second is used to delay time; Be used for judging once more the device that blast pressure is whether low; If judge that once more blast pressure is low, then be used to export the device of blowing out, warning; If judge that once more blast pressure is normal, then be used to judge the device that lubricating oil pressure is whether low;
If judge that first blast pressure is normal, then be directly used in the device of judging that lubricating oil pressure is whether low;
Relatively whether lubricating oil pressure is lower than the artificial in advance lubricating oil pressure value of setting.
If lubricating oil pressure is low, the wait t16 device of second is used to delay time; Be used for judging once more the device that lubricating oil pressure is whether low; If judge that once more lubricating oil pressure is low, then be used to export the device of blowing out, warning; If judge that once more lubricating oil pressure is normal, then be used to the device of judging whether the burner door is opened;
If judge that first lubricating oil pressure is normal, then is directly used in the device of judging whether the burner door is opened;
If the burner door is opened, the wait t17 device of second is used to delay time; Be used for the device of judging once more whether the burner door is opened; Open if judge the burner door once more, then be used to export the device of blowing out, warning; Close if judge the burner door once more, then return the described device that is used to gather the boiler operatiopn variable;
Close if judge the burner door first, then directly return the described device that is used to gather the boiler operatiopn variable.

Claims (5)

1. steam-injection boiler optimization running control system, comprise water supply mechanism (1), heating furnace (2), Blast mechanism (3), gas supply mechanism (4), fuel oil organization of supply (5), steam output mechanism (6) and chimney (7), wherein water supply mechanism (1) supplies water to heating furnace (2), Blast mechanism (3) send oxygen to heating furnace (2), gas supply mechanism (4) supplies combustion gas to heating furnace (2), fuel oil organization of supply (5) supplies fuel oil to heating furnace (2), the steam that heating furnace (2) generates is exported by steam output mechanism (6), the flue gas that heating furnace (2) produces is discharged through chimney (7), it is characterized in that:
Flue-gas temperature sensor (7a) and flue gas oxygen content sensor (7b) are installed in the exit of described chimney (7), flow of inlet water meter (1e), inflow temperature meter (1f) are installed in described water supply mechanism (1) and lead and detect meter (1i) to water power, fuel flowmeter (5a) is installed in described fuel oil organization of supply (5), gas meter (4a) is installed in described gas supply mechanism (4), the stove water power is installed in described steam output mechanism (6) leads detection meter (6d);
Fuel oil electrically-controlled valve (14) is installed in described fuel oil organization of supply (5), gas electromagnetic valve (15) is installed in described gas supply mechanism (4), described fuel oil electrically-controlled valve (14) and gas electromagnetic valve (15) are driven by electric operator (21), air blast (3a) is installed in described Blast mechanism (3), this air blast (3a) is driven by blower variable frequency device (3b), feed pump (1a) is installed in described water supply mechanism (1), and this feed pump (1a) is driven by feedwater frequency converter (1j);
Described flue-gas temperature sensor (7a), flue gas oxygen content sensor (7b), flow of inlet water meter (1e), inflow temperature meter (1f), fuel flowmeter (5a), gas meter (4a), lead to water power and to detect meter (1i) and stove water power and lead the output that detects meter (6d) and be connected to the flue-gas temperature end, flue gas oxygen content end, flow of inlet water end, inflow temperature end, fuel flow end, gas flow end of CPU (20), lead to water power and hold and the stove water power is led on the end;
The fuel control end of described CPU (20), air quantity control end, feedwater control end connect the input of described electric operator (21), blower variable frequency device (3b) and feedwater frequency converter (1j) respectively;
Described CPU (20) stores the latent heat of vaporization value Hqh of saturation water under the absolute pressure and the saturation water enthalpy Hbs under the absolute pressure;
Described CPU (20) also is provided with:
The device that is used to begin;
Be used to read and set boiler thermal output η ', set measuring and calculating mass dryness fraction G1, set the device that electricity is led the latent heat of vaporization value Hqh of saturation water under saturation water enthalpy Hbs under mass dryness fraction G3, fuel value Rr, the absolute pressure, the absolute pressure;
Be used to gather flue-gas temperature T Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device;
Be used to calculate the device of boiler feed water enthalpy Hs;
Be used to calculate excess air coefficient Y YqDevice;
Be used to calculate the device of boiler thermal output η;
Be used for judging | described setting boiler thermal output η '-boiler thermal output η | whether less than 1.5% device;
If | η '-η | more than or equal to 1.5%, then enter blower variable frequency device (3b) frequency adjustment flow process;
If | η '-η | less than 1.5%, then enter the device that is used to calculate measuring and calculating mass dryness fraction G2;
Being used for judging | described setting measuring and calculating mass dryness fraction G1-calculates measuring and calculating mass dryness fraction G2| whether less than 2.5% device;
If | G1-G2| then enters electric operator (21) control flow fast more than or equal to 2.5%;
If | G1-G2| then enters the variable feedwater conductivity D that is used to gather boiler operatiopn less than 2.5% 1, stove water conductivity D 2Device;
Be used to calculate the device that electricity is led mass dryness fraction G4;
Being used for judging | the described electricity of setting is led mass dryness fraction G3-measuring and calculating electricity and is led mass dryness fraction G4| whether less than 2.5% device;
If | G3-G4| then returns the described flue-gas temperature T that is used to gather less than 2.5% Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device;
If | G3-G4| then enters accurately control flow of electric operator (21) more than or equal to 2.5%.
2. steam-injection boiler optimization running control system according to claim 1 is characterized in that: described blower variable frequency device (3b) frequency adjustment flow process comprises:
Be used to judge that described η ' is whether greater than the device of η;
If η ' greater than η, then is used to increase the device of blower variable frequency device (3b) frequency; Return the described flue-gas temperature T that is used to gather Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device;
If η ' less than η, then is used to reduce the device of blower variable frequency device (3b) frequency; Return the described flue-gas temperature T that is used to gather Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device.
3. steam-injection boiler optimization running control system according to claim 1 is characterized in that: described electric operator (21) control flow fast comprises:
Be used to judge that described G1 is whether greater than the device of G2;
If G1 greater than G2, then is used to increase the device of electric operator (21) aperture; Return the described flue-gas temperature T that is used to gather Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device;
If G1 less than G2, then is used to reduce the device of electric operator (21) aperture; Return the described flue-gas temperature T that is used to gather Yq, flue gas oxygen content O2, fuel flow rate Qr, boiler feed water temperature value T1 and flow of inlet water Q device.
4. steam-injection boiler optimization running control system according to claim 1 is characterized in that: described electric operator (21) accurately control flow comprises:
Be used to judge that described G3 is whether greater than the device of G4;
If G3 greater than G4, then is used to increase the device of electric operator (21) aperture;
10 minutes device of wait is used to delay time;
If G3 less than G4, then is used to reduce the device of electric operator (21) aperture;
Described 10 minutes the device of wait that is used to delay time; Return the described variable feedwater conductivity D that is used to gather boiler operatiopn 1, stove water conductivity D 2Device.
5. steam-injection boiler optimization running control system according to claim 1 is characterized in that: described CPU (20) also is provided with:
The device that is used to begin;
Be used to gather the device of boiler operatiopn variable;
Be used to judge the device that the boiler feed water flow is whether low;
If flow of inlet water is low, the wait t1 device of second is used to delay time; Be used for judging once more the device that the boiler feed water flow is whether low; If judge that once more the boiler feed water flow is low, then be used to export the device of blowing out, warning; If judge that once more the boiler feed water flow is normal, then be used to judge the device that steam pressure is whether low;
If judge that first flow of inlet water is normal, then be directly used in the device of judging that steam pressure is whether low;
If steam pressure is low, the wait t2 device of second is used to delay time; Be used for judging once more the device that steam pressure is whether low; If judge that once more steam pressure is low, then be used for output alarm, device shown, return the described device that is used to gather the boiler operatiopn variable; If judge that once more steam pressure is not low, then be used to judge the device that steam pressure is whether high;
If judge that first steam pressure is not low, then be directly used in the device of judging that steam pressure is whether high;
If the steam pressure height, the wait t3 device of second is used to delay time; Be used for judging once more the device that steam pressure is whether high; If judge the steam pressure height once more, then be used to export the device of blowing out, warning; If judge that once more steam pressure is normal, then be used to judge the device that vapor (steam) temperature is whether high;
If judge that first steam pressure is normal, then be directly used in the device of judging that vapor (steam) temperature is whether high;
If the vapor (steam) temperature height, the wait t4 device of second is used to delay time; Be used for judging once more the device that vapor (steam) temperature is whether high; If judge the vapor (steam) temperature height once more, then be used to export the device of blowing out, warning; If judge that once more vapor (steam) temperature is normal, then be used to judge the device that tube wall temperature is whether high;
If judge that first vapor (steam) temperature is normal, then be directly used in the device of judging that tube wall temperature is whether high;
If the tube wall temperature height, the wait t5 device of second is used to delay time; Be used for judging once more the device that tube wall temperature is whether high; If judge the tube wall temperature height once more, then be used to export the device of blowing out, warning; If judge that once more tube wall temperature is normal, then be used to judge the device that the burner temperature is whether high;
If judge that first tube wall temperature is normal, then be directly used in the device of judging that the burner temperature is whether high;
If burner temperature height, the wait t6 device of second is used to delay time; Be used for judging once more the device that the burner temperature is whether high; If judge burner temperature height once more, then be used for output alarm, device shown; If judge that once more the burner temperature is normal, then be used to judge the device that fuel oil temperature is whether high;
If judge that first the burner temperature is normal, then be directly used in the device of judging that fuel oil temperature is whether high;
If the fuel oil temperature height, the wait t7 device of second is used to delay time; Be used for judging once more the device that fuel oil temperature is whether high; If judge the fuel oil temperature height once more, then be used for output alarm, device shown; If judge that once more fuel oil temperature is not high, then be used to judge the device that fuel oil temperature is whether low;
If judge that first fuel oil temperature is not high, then be directly used in the device of judging that fuel oil temperature is whether low;
If fuel oil temperature is low, the wait t8 device of second is used to delay time; Be used for judging once more the device that fuel oil temperature is whether low; If judge that once more fuel oil temperature is low, then be used for output alarm, device shown; If judge that once more fuel oil temperature is normal, then be used to judge the device that flue-gas temperature is whether high;
If judge that first fuel oil temperature is normal, then be directly used in the device of judging that flue-gas temperature is whether high;
If the flue-gas temperature height, the wait t9 device of second is used to delay time; Be used for judging once more the device that flue-gas temperature is whether high; If judge the flue-gas temperature height once more, then be used for output alarm, device shown; If judge that once more flue-gas temperature is normal, then be used to judge the device that atomizing pressure is whether low;
If judge that first flue-gas temperature is normal, then be directly used in the device of judging that atomizing pressure is whether low;
If atomizing pressure is low, the wait t10 device of second is used to delay time; Be used for judging once more the device that atomizing pressure is whether low; If judge that once more atomizing pressure is low, then be used for output alarm, device shown; If judge that once more atomizing pressure is normal, then be used to judge the device that entrance of water-supplying pump pressure is whether low;
If judge that first atomizing pressure is normal, then be directly used in the device of judging that feed pump (1a) inlet pressure is whether low;
If feed pump (1a) inlet pressure is low, the wait t11 device of second is used to delay time; Be used for judging once more the device that feed pump (1a) inlet pressure is whether low; If judge that once more feed pump (1a) inlet pressure is low, then be used to export the device of blowing out, warning; If judge that once more feed pump (1a) inlet pressure is normal, be used to then to judge that whether low instrument with air pressure device;
If judge that first feed pump (1a) inlet pressure is normal, then be directly used in and judge that whether low instrument with air pressure device;
If instrument is low with air pressure, the wait t12 device of second is used to delay time; Be used for judging once more that whether low instrument with air pressure device; If judge that once more instrument is low with air pressure, then be used for output alarm, device shown; If judge that once more instrument is normal with air pressure, then be used to judge the device that gaseous-pressure is whether low;
If judge that first instrument is normal with air pressure, then be directly used in the device of judging that gaseous-pressure is whether low;
If gaseous-pressure is low, the wait t13 device of second is used to delay time; Be used for judging once more the device that gaseous-pressure is whether low; If judge that once more gaseous-pressure is low, then be used for output alarm, device shown; If judge that once more gaseous-pressure is normal, be used to then to judge that pump discharge pressure-steam pressure is whether greater than the device of 2MP;
If judge that first gaseous-pressure is normal, then be directly used in and judge that pump discharge pressure-steam pressure is whether greater than the device of 2MP;
If pump discharge pressure-steam pressure greater than 2MP, then is used for output alarm, device shown;
If pump discharge pressure-steam pressure is not more than 2MP, be used to then to judge that steam pressure-pump discharge pressure is whether less than the device of 4MP;
If steam pressure-pump discharge pressure is not less than 4MP, the wait t14 device of second is used to delay time; Be used for judging once more that steam pressure-pump discharge pressure is whether less than the device of 4MP; If judge that once more steam pressure-pump discharge pressure is not less than 4MP, then be used to export the device of blowing out, warning; If judge steam pressure-pump discharge pressure once more, then be used to judge to going out temperature-to going into temperature whether less than 50 ℃ device less than 4MP;
If judge steam pressure-pump discharge pressure first, then be directly used in judgement to going out temperature-to going into temperature whether less than 50 ℃ device less than 4MP;
If to going out temperature-, then be used for output alarm, device shown to going into temperature less than 50 ℃;
If to going out temperature-be not less than 50 ℃, be used to then to judge that vapor (steam) temperature-spoke goes into temperature whether less than 150 ℃ device to going into temperature;
If vapor (steam) temperature-spoke is gone into temperature less than 150 ℃, then be used for output alarm, device shown;
Be not less than 150 ℃ if vapor (steam) temperature-spoke is gone into temperature, be used to then to judge that described setting boiler thermal output η '-boiler thermal output η is whether greater than 10% device;
If set boiler thermal output η '-boiler thermal output η greater than 10%, then be used for output alarm, device shown;
Be not more than 10% if set boiler thermal output η '-boiler thermal output η, be used to then to judge that the unit of fuel factor of created gase is whether less than 16 device;
If the unit of fuel factor of created gase less than 16, then is used for output alarm, device shown;
If the unit of fuel factor of created gase is not less than 16, then be used to the device of judging whether boiler stops working;
If boiler is flame-out, then be used to export the device of blowing out, warning;
If boiler is not flame-out, then be used to judge whether normally device of boiler power supply;
If the boiler power supply is undesired, then be used to export the device of blowing out, warning;
If the boiler power supply is normal, then be used to judge the device that described blast pressure is whether low;
If blast pressure is low, the wait t15 device of second is used to delay time; Be used for judging once more the device that blast pressure is whether low; If judge that once more blast pressure is low, then be used to export the device of blowing out, warning; If judge that once more blast pressure is normal, then be used to judge the device that lubricating oil pressure is whether low;
If judge that first blast pressure is normal, then be directly used in the device of judging that lubricating oil pressure is whether low;
If lubricating oil pressure is low, the wait t16 device of second is used to delay time; Be used for judging once more the device that lubricating oil pressure is whether low; If judge that once more lubricating oil pressure is low, then be used to export the device of blowing out, warning; If judge that once more lubricating oil pressure is normal, then be used to the device of judging whether the burner door is opened;
If judge that first lubricating oil pressure is normal, then is directly used in the device of judging whether the burner door is opened;
If the burner door is opened, the wait t17 device of second is used to delay time; Be used for the device of judging once more whether the burner door is opened; Open if judge the burner door once more, then be used to export the device of blowing out, warning; Close if judge the burner door once more, then return the described device that is used to gather the boiler operatiopn variable;
Close if judge the burner door first, then directly return the described device that is used to gather the boiler operatiopn variable.
CN2009101040128A 2009-06-04 2009-06-04 Steam-injection boiler optimization running control system Expired - Fee Related CN101576248B (en)

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