CN104197324B - Fluidized-bed combustion boiler burning optimization adjustment control method and device - Google Patents

Fluidized-bed combustion boiler burning optimization adjustment control method and device Download PDF

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CN104197324B
CN104197324B CN201410495934.7A CN201410495934A CN104197324B CN 104197324 B CN104197324 B CN 104197324B CN 201410495934 A CN201410495934 A CN 201410495934A CN 104197324 B CN104197324 B CN 104197324B
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control
auto
bed
boiler
fluidized
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CN201410495934.7A
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CN104197324A (en
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张福伟
姜曰振
李向军
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北京中科润东节能技术有限公司
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Abstract

The present invention relates to fluidized-bed combustion boiler burning optimization regulable control technical field, particularly relate to fluidized-bed combustion boiler burning optimization adjustment control method and device.The method comprises: the duty parameter receiving the parameter sensors collection that fluidized-bed combustion boiler is installed; According to duty parameter and pre-set with the parameter range of operation corresponding to duty parameter, regulation and control are optimized to the water system of fluidized-bed combustion boiler and wind coal proportion; Wherein the water system regulation and control of fluidized-bed combustion boiler are comprised: steam water-level auto-control, main steam temperature auto-control; The wind coal proportion Optimum Regulation of fluidized-bed combustion boiler is comprised: combustion chamber draft auto-control, air output auto-control, bed temperature auto-control, bed of material differential pressure auto-control and boiler main-piping pressure auto-control.Fluidized-bed combustion boiler burning optimization adjustment control method provided by the invention and device, realize fluidized-bed combustion boiler water system and wind coal proportion regulates optimization automatically, and auto-control decreases the impact of artificial regulatory factor.

Description

Fluidized-bed combustion boiler burning optimization adjustment control method and device
Technical field
The present invention relates to fluidized-bed combustion boiler burning optimization regulable control technical field, in particular to fluidized-bed combustion boiler burning optimization adjustment control method and device.
Background technology
The energy reserve amount position of China is at the forefront in the world, is also second-biggest-in-the-world production of energy state and country of consumption simultaneously.China's primary energy resource gross reserves is approximately 4,000,000,000,000 tons of standard coals.But per capita energy's resources occupation amount and consumption figure are far below world average level.Chinese energy develops and presents following main feature:
One be the energy based on coal, renewable resource development and utilization level is very low.The coal resources that China is verified account for more than 90% of the primary energy total amounts such as coal, oil, natural gas, water energy and nuclear energy, and coal is dominant in Chinese energy production and supplyment.In world energy sources to be main by coal to oil gas be main Structure Transformation process, China is still one of the several energy of only a few in the world country based on coal.
Two is that total energy consumption constantly increases, and efficiency of energy utilization is lower.Along with the continuous expansion of economic scale, the energy-consuming of China is in continuing ascendant trend.
Resource environment restriction is the conspicuous contradiction that current China socio-economic development faces.Solve energy-conserving and environment-protective problem, be expand domestic demand, steady growth, tune structure, make an important and pressing task of China's economic upgrade version.Accelerating development energy-conserving and environment-protective industry, to pulling investment and consumption, forming new growth engines, promote industrial upgrading and development pattern transformation, promote that energy-saving and emission-reduction and the people's livelihood are improved, realize sustainable economic development and guarantee that the year two thousand twenty builds up well-off society comprehensively, tool is of great significance.
Traditional burning in circulating fluid bed boiler adopts dcs DCS system to control, but existing DCS system is mainly based on manually regulating and controlling, and control accuracy is not high, causes burning in circulating fluid bed boiler efficiency low, thus causes the waste of the energy.
Summary of the invention
The object of the present invention is to provide fluidized-bed combustion boiler burning optimization adjustment control method and device, to solve the above problems.
Provide a kind of fluidized-bed combustion boiler burning optimization adjustment control method in an embodiment of the present invention, comprising: the duty parameter receiving the parameter sensors collection that fluidized-bed combustion boiler is installed; According to described duty parameter and pre-set with the parameter range of operation corresponding to described duty parameter, regulation and control are optimized to the water system of described fluidized-bed combustion boiler and wind coal proportion; Wherein the water system regulation and control of described fluidized-bed combustion boiler are comprised: steam water-level auto-control, main steam temperature auto-control; The wind coal proportion Optimum Regulation of described fluidized-bed combustion boiler is comprised: combustion chamber draft auto-control, air output auto-control, bed temperature auto-control, bed of material differential pressure auto-control and boiler main-piping pressure auto-control.
Preferably, to steam water-level auto-control in the method, comprise: according to feedwater flow, main steam flow, feed pressure determination feedwater flow regulation scope included in described duty parameter, comprising: when the flowed fluctuation of described main steam flow exceeds allowed band, according to the carbonated drink ratio of setting, determine feedwater flow regulation scope; Difference between described feed pressure and feed pressure setting value exceeds feed pressure difference allowed band, and the difference between described feedwater flow and feedwater flow setting value is when exceeding feedwater flow difference allowed band, according to described feedwater flow difference allowed band, determine feedwater flow regulation scope; According to described feedwater flow regulation scope, generate feedwater flow regulation instruction, and described feedwater flow regulation instruction is sent to water-supply valve, to regulate and control the feedwater flow of described water-supply valve.
Preferably, to main steam temperature auto-control in the method, comprising: obtain the desuperheat temperature gap between attemperator outlet temperature included in described duty parameter and attemperator outlet temperature setting value; When described desuperheat temperature gap exceeds desuperheat temperature gap allowed band, according to described desuperheat temperature gap allowed band, determine attemperator outlet temperature adjustable range; According to described attemperator outlet temperature adjustable range, generate desuperheating water regulating command, and described desuperheating water regulating command is sent to Desuperheating water regulating valve, to regulate and control described attemperator outlet temperature.
Preferably, to combustion chamber draft auto-control in the method, comprising: obtain the absorbing quantity difference between absorbing quantity included in described duty parameter and absorbing quantity setting value; When described absorbing quantity difference exceeds the absorbing quantity difference allowed band of setting, determine absorbing quantity adjustable range; According to described absorbing quantity adjustable range, generate absorbing quantity regulating command, and described absorbing quantity regulating command is sent to air induction control system, to regulate and control the negative pressure in described fluid bed boiler furnace.
Preferably, to air output auto-control in the method, comprising: obtain the oxygen amount difference between Oxygen Amount in Flue Gas and oxygen amount setting value that described duty parameter comprises; According to primary air flow included in described duty parameter and secondary air flow, obtain total air output in boiler; Described oxygen amount difference is utilized to compensate air output total in described boiler; Obtain the total blast volume difference between total air output and total air output setting value in the described boiler after described compensation; Generate air quantity regulating command according to described total blast volume difference, the bonded boiler type of furnace carries out proportioning to a secondary air flow, and described air quantity regulating command is sent to First air damper, secondary air regulation air door place carries out air volume control.
Preferably, the method also comprises: the boiler load obtaining work at present process; According to described boiler load and the described oxygen amount setting value that pre-sets, determine steam flow control value, utilize described steam flow control value to revise described oxygen amount setting value.
Preferably, to bed temperature auto-control in the method, comprising: when boiler load changes, according to the control value of the variable quantity determination primary air flow of described boiler load; According to the control value of described primary air flow, generate First air regulation and control instruction, and described First air regulation and control instruction is sent to First air damper place carries out primary air flow adjustment; After described primary air flow regulates, obtain bed temperature changing value; According to described bed temperature changing value, determine coal-supplying amount changing value; According to described coal-supplying amount changing value regulation and control coal-supplying amount.
Preferably, to bed of material differential pressure auto-control in the method, comprising: obtain thickness of feed layer, according to the steam flow in air compartment temperature, bed temperature and boiler, determine that the bed of material regulates pressure, regulate thickness of feed layer described in pressure controlling according to the described bed of material.
Preferably, to boiler main-piping pressure auto-control in the method, comprising: obtain female pipe vapour pressure; Obtain the main-piping pressure difference between described female pipe vapour pressure and main-piping pressure setting value; When described main-piping pressure difference exceeds main-piping pressure difference allowed band, determine main-piping pressure regulated value; According to described main-piping pressure regulated value, generate main-piping pressure regulating command; Utilize described main-piping pressure regulating command, regulate coal supply system.
The embodiment of the present invention additionally provides a kind of fluidized-bed combustion boiler burning optimization control set for adjusting, comprising: receiver module, for receiving the duty parameter of the parameter sensors collection that fluidized-bed combustion boiler is installed; Regulation and control module, for according to described duty parameter and pre-set with the parameter range of operation corresponding to described duty parameter, regulation and control are optimized to the water system of described fluidized-bed combustion boiler and wind coal proportion; Wherein the water system regulation and control of described fluidized-bed combustion boiler are comprised: steam water-level auto-control, main steam temperature auto-control; The wind coal proportion Optimum Regulation of described fluidized-bed combustion boiler is comprised: combustion chamber draft auto-control, air output auto-control, bed temperature auto-control, bed of material differential pressure auto-control and boiler main-piping pressure auto-control.
The fluidized-bed combustion boiler burning optimization adjustment control method that the embodiment of the present invention provides and device, utilize the duty parameter of parameter sensors acquisition stream fluidized bed boiler, and carry out steam water-level according to duty parameter, main steam temperature, combustion chamber draft, air output, bed temperature, the auto-control of bed of material differential pressure and boiler main-piping pressure, thus realize fluidized-bed combustion boiler water system and wind coal proportion regulates optimization automatically, and according to duty parameter auto-control in the auto-control process of fluidized-bed combustion boiler, decrease the impact of artificial regulatory factor, coal-air ratio is regulated and controled more accurately and timely, under making coal-air ratio remain on comparatively rational proportioning state simultaneously, thus also can improve the efficiency of combustion of fluidized-bed combustion boiler and the utilization rate of coal resources, reduce the waste of the energy.
Accompanying drawing explanation
Fig. 1 shows the flow chart of fluidized-bed combustion boiler burning optimization adjustment control method in the embodiment of the present invention;
Fig. 2 shows the schematic flow sheet that in the embodiment of the present invention, air output controls;
Fig. 3 shows the schematic flow sheet of bed temperature auto-control in the embodiment of the present invention;
Fig. 4 shows the schematic flow sheet of bed of material differential pressure auto-control in the embodiment of the present invention;
Fig. 5 shows the schematic flow sheet of boiler main-piping pressure auto-control in the embodiment of the present invention;
Fig. 6 shows the structural representation of fluidized-bed combustion boiler burning optimization control set for adjusting in the embodiment of the present invention.
Detailed description of the invention
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
Embodiments provide a kind of fluidized-bed combustion boiler burning optimization adjustment control method, as shown in Figure 1, main processing steps comprises:
Step S11: the duty parameter receiving the parameter sensors collection that fluidized-bed combustion boiler is installed;
Step S12: according to duty parameter and pre-set with the parameter range of operation corresponding to duty parameter, regulation and control are optimized to the water system of fluidized-bed combustion boiler and wind coal proportion;
Wherein the water system regulation and control of fluidized-bed combustion boiler are comprised: steam water-level auto-control, main steam temperature auto-control; The wind coal proportion Optimum Regulation of fluidized-bed combustion boiler is comprised: combustion chamber draft auto-control, air output auto-control, bed temperature auto-control, bed of material differential pressure auto-control and boiler main-piping pressure auto-control.
The fluidized-bed combustion boiler burning optimization adjustment control method of the embodiment of the present invention, utilize the duty parameter of parameter sensors acquisition stream fluidized bed boiler, and carry out steam water-level according to duty parameter, main steam temperature, combustion chamber draft, air output, bed temperature, the auto-control of bed of material differential pressure and boiler main-piping pressure, thus realize the water system of fluidized-bed combustion boiler and wind coal proportion regulates optimization automatically, and according to duty parameter auto-control in the auto-control process of fluidized-bed combustion boiler, decrease the impact of artificial regulatory factor, coal-air ratio is regulated and controled more accurately and timely, under making coal-air ratio remain on comparatively rational proportioning state simultaneously, thus also can improve the efficiency of combustion of fluidized-bed combustion boiler and the utilization rate of coal resources, reduce the waste of the energy.
In the running of fluidized-bed combustion boiler, steam water-level reflects the equilibrium relation of Boiler Steam load and confluent indirectly, be a very important monitoring parameter in boiler operatiopn, keep steam water-level to be normally the essential condition ensureing steam turbine and safe operation of the boiler.The too high normal work that can affect water separator in drum of steam water-level, causes outlet vapor excess moisture and makes superheater tube wall incrustation, easily causing superheater to burn out.Steam water-level is too low, then may destroy boiler water cycle, causes water screen tube burn out and break.
For keeping the stable of steam water-level and carbonated drink balance, in this method, auto-control is carried out to steam water-level, concrete regulate and control method comprises: according to feedwater flow, main steam flow, feed pressure determination feedwater flow regulation scope included in duty parameter, comprising: when the flowed fluctuation of main steam flow exceeds allowed band, according to the carbonated drink ratio of setting, determine feedwater flow regulation scope; Difference between feed pressure and feed pressure setting value exceeds feed pressure difference allowed band, and the difference between feedwater flow and feedwater flow setting value is when exceeding feedwater flow difference allowed band, according to feedwater flow difference allowed band, determine feedwater flow regulation scope; According to feedwater flow regulation scope, generate feedwater flow regulation instruction, and feedwater flow regulation instruction is sent to water-supply valve, to regulate and control the feedwater flow of water-supply valve.
By the auto-control of above-mentioned steam water-level, stable and the carbonated drink balance of steam water-level in fluidized-bed combustion boiler can be kept, make steam water-level at the upper and lower slight fluctuation of a certain setting value, and the hard work adopting the method for this kind of steam water-level auto-control also effectively to alleviate operating personnel's Non-follow control water level to bring, reduce corresponding potential safety hazard.
In the operation of fluidized-bed combustion boiler, the temperature of superheated steam is the highest.During normal operation, superheater temperature is just close to the permission maximum temperature of its material.Higher temperature of Overheated Steam, can make superheater pipe accelerate distortion or premature breakdown, so that cause the accident.And superheated steam steam temperature is too low, the thermal efficiency of unit can be reduced, also make the steam moisture of steam turbine afterbody increase, cause erosion and the wearing and tearing of afterbody blade, threaten equipment safety operation, so superheat steam temperature is the important parameter affecting thermal power plant safe operation and economic benefit.
For realizing the auto-control to superheat steam temperature, to main steam temperature auto-control in the present invention, concrete methods of realizing is: obtain the desuperheat temperature gap between attemperator outlet temperature included in duty parameter and attemperator outlet temperature setting value; When desuperheat temperature gap exceeds desuperheat temperature gap allowed band, according to desuperheat temperature gap allowed band, determine attemperator outlet temperature adjustable range; According to attemperator outlet temperature adjustable range, generate desuperheating water regulating command, and desuperheating water regulating command is sent to Desuperheating water regulating valve, to regulate and control attemperator outlet temperature.
Utilize said method to main steam temperature auto-control, the temperature of superheated steam can be controlled, reasonable adjusting warm water flow, saving water resource, reduce hot working fluid loss, guarantee the long-time safety and economic operation of boiler, and operations staff's labour intensity can also be reduced to Boiler Steam Temperature auto-control, reduce the impact of artifact in regulation process.
During fluidized-bed combustion boiler runs, the task of air induction control system ensures certain combustion chamber draft power, and combustion chamber draft is too little even becomes malleation, can make burner hearth flame and flue gas from measuring point hole and furnace wall gap excessive, affect equipment and personal security.And combustion chamber draft is crossed conference and made a large amount of cold air enter in stove, increase air-introduced machine load and heat loss due to exhaust gas, time serious, even cause furnace explosion.
In this method, the concrete grammar of combustion chamber draft auto-control is comprised: obtain the absorbing quantity difference between absorbing quantity included in duty parameter and absorbing quantity setting value; When absorbing quantity difference exceeds the absorbing quantity difference allowed band of setting, determine absorbing quantity adjustable range; According to absorbing quantity adjustable range, generate absorbing quantity regulating command, and absorbing quantity regulating command is sent to air induction control system, to regulate and control the negative pressure in fluid bed boiler furnace.
By the above-mentioned auto-control to combustion chamber draft, guarantee that fluidized-bed combustion boiler drops into smoothly, steadily, for a long time, reduce the too high loss caused of exhaust gas temperature.For accurate control combustion, energy-conservation creation technical conditions.Fluctuate elimination negative pressure after air inducing drops into Automatic Optimal adjustment large phenomenon, and make primary and secondary air and air inducing reach the proportioning of an optimum combustion regime.
In the air output control system of the actual set of fluidized-bed combustion boiler, as shown in Figure 2, need to measure primary air flow and secondary air flow, and draw total blast volume according to primary air flow and secondary air flow sum.Overfire air fan is the same with coal supply control system in addition, also needs to compensate the gain of controlled plant.In oxygen content-air system, the set-point of oxygen amount does not often get constant, but along with the load variations of boiler.This is because the oxygen content of the best is relevant with boiler load, when load increases, best oxygen content reduces, and this ensures by revising oxygen content set-point with steam flow.Guarantee that wind is enough, but not superfluous.Reduce imperfect combustion (chemistry, mechanical incomplete combustion) as far as possible.Oxygen amount makes coal-air ratio reach optimum optimization fired state, drops in rational scope by lime-ash carbon containing index after realizing Automatic Optimal adjustment, also guarantees steam generator system safe and stable operation simultaneously.
Based on above-mentioned Boiler pressure control principle, to air output auto-control in this method, as shown in Figure 2, comprising: the oxygen amount difference between the Oxygen Amount in Flue Gas that acquisition duty parameter comprises and oxygen amount setting value; According to primary air flow included in duty parameter and secondary air flow, obtain total air output in boiler; Oxygen amount difference is utilized to compensate air output total in boiler; Obtain the total blast volume difference between total air output and total air output setting value in the boiler after compensating; Generate air quantity regulating command according to total blast volume difference, the bonded boiler type of furnace carries out proportioning to a secondary air flow, and described air quantity regulating command is sent to First air damper, secondary air regulation air door place carries out air volume control.
As shown in Figure 2, this loop adopts bunch grade adjustment, and major loop is oxygen flow regulation, and subloop is that total air output regulates.In major loop, the polyoxy measuring point in boiler is averaged, as controlled volume; In subloop, a Secondary Air proportioning (boiler type is different, and proportioning parameter is different) is done to air output, calculate controlled secondary air flow size, adjust secondary air flow by secondary air regulation air door.
Also comprise in the auto-control of air output: the boiler load obtaining work at present process; According to boiler load and the oxygen amount setting value that pre-sets, determine steam flow control value, utilize steam flow control value to revise oxygen amount setting value.
In the operation of fluidized boiler, the bed temperature of recirculating fluidized bed is a very important controling parameters, the safe and continuous that it directly affects boiler is run, to in the auto-control of bed temperature, quote the combustion control system of " bed temperature conditioning signal 3 ", bed temperature can be made better to be controlled and be conducive to boiler safe and continuous run.
To bed temperature auto-control in this method, comprising: when boiler load changes, according to the control value of the variable quantity determination primary air flow of boiler load; According to the control value of primary air flow, generate First air regulation and control instruction, and First air regulation and control instruction is sent to First air damper place and carries out primary air flow adjustment; After primary air flow regulates, obtain bed temperature changing value; According to bed temperature changing value, determine coal-supplying amount changing value; According to coal-supplying amount changing value regulation and control coal-supplying amount.
The dynamic regulation process of above-mentioned fluidized bed temperature can underdraw as shown in Figure 3, when boiler load changes, first change primary air flow, subsequently due to the change of bed temperature, burning self-regulation coal-supplying amount changes, and makes automatic combustion regulating system advancement and the rapid requirement adapting to load variations.
As shown in Figure 3, the bed temperature value of this loop to multiple bed temperature measurement point gets maximum, and bad point is excised, bed temperature setting value and the bed temperature maximum of getting is utilized to carry out bed temperature optimization, wherein in bed temperature auto-control process, introduce steam flow 1 after compensating, primary air flow, bed temperature conditioning signal 3 and relevant auxiliary parameter and adjustment is optimized to bed temperature.
In said method, when coal-supplying amount changes, when there is spontaneous disturbance in coal supply side, now utilize bed temperature signal to react soon spontaneous disturbance that coal supply is eliminated in coal supply disturbance in time.Realize bed temperature Automatic Optimal to control to be ensure that bed temperature is in operation to remain optimum state, with to guarantee when load variations fuel can under best combustion environment Thorough combustion, also ensure that desulfurized effect, to reach the object of environmental protection simultaneously.
In the bed of material differential pressure auto-control of fluidized-bed combustion boiler, the material control of bed height and the safe and continuous of boiler are run closely related, and namely bed pressure control controls thickness of feed layer.The bed of material is too thick, First air " public attention " can be pushed down, make furnace charge can not reach the state of complete fluidisation; The bed of material is too thin, first can not meet the requirement of load, First air secondly can be made to penetrate the bed of material and blow out stove fire.
To bed of material differential pressure auto-control in this method, comprising: obtain thickness of feed layer, according to the steam flow in air compartment temperature, bed temperature and boiler, determine that the bed of material regulates pressure, regulate pressure controlling thickness of feed layer according to the bed of material.Bed of material differential pressure automatic optimal makes bed of material differential pressure reach optimal value, makes boiler enter efficient state simultaneously after controlling input, reduces ash content carbon.
As shown in Figure 4, in the actual regulation process of bed of material pressure reduction, bed of material differential pressure circuit gathers the bed of material pressure reduction of multiple measurement point, and is averaged the bed of material pressure reduction obtained; In the regulation process of bed of material pressure reduction, also need the air compartment temperature gathering multiple measurement point, and the air compartment temperature that degree obtains is averaged; Utilize the mean value of bed of material pressure reduction and the mean value of air compartment temperature, utilize steam flow 1 and bed temperature 2 Isoquant to realize the auto-control of bed temperature simultaneously.The auto-control utilizing the method to carry out bed of material pressure reduction can make bed of material differential pressure reach optimal value, makes boiler enter efficient state simultaneously, reduces ash content carbon.
The fluidized-bed combustion boiler burning optimization adjustment control method of the embodiment of the present invention also comprises boiler main-piping pressure auto-control, and concrete grammar is: obtain female pipe vapour pressure; Obtain the main-piping pressure difference between female pipe vapour pressure and main-piping pressure setting value; When main-piping pressure difference exceeds main-piping pressure difference allowed band, determine main-piping pressure regulated value; According to main-piping pressure regulated value, generate main-piping pressure regulating command; Utilize main-piping pressure regulating command, regulate coal supply system.
As shown in Figure 5, this loop can be done female pipe and be coordinated to regulate with single stove to switch, and the coordination of female pipe or single stove can be selected to regulate two kinds of optimized Control Mode.When pipe optimal control female as multiple stage boiler, in conjunction with each single stove main vapour pressure difference, pressure distribution is carried out to each boiler, each boiler to automatically adjust feeder and garbage feeder (garbage feeder control loop can be removed for the boiler not burning rubbish) according to the pressure parameter of female pipe coordinated allocation, wherein automatically regulating in feeder and garbage feeder process, introduce the relevant parameter of steam flow 2 and bed temperature adjustment 3, to make adjustment process more reasonable.
The basic task that boiler combustion process regulates automatically, is the needs that the heat that fuel combustion is provided adapts to Boiler Steam load, also should ensures boiler safety, economical operation simultaneously.The Scheme Choice of combustion process automatic regulating system and coal supply, CFBB technique and boiler have substantial connection with the connected mode (unit style, piping-main scheme) etc. of steam turbine.The main task that boiler combustion regulates maintains boiler export steam pressure constant.Steam production and the steam turbine steam consumption of the reacting condition of vapour pressure boiler are incompatible.Therefore, vapour pressure be maintained, correspondingly must change combustion rate, make the steam production of boiler can adapt to the needs of external load.Coal supply loop will make coal-air ratio reach best combustion ratio after dropping into Automatic Optimal adjustment, make burning more abundant, make the operation conditions that boiler combustion situation reaches desirable.Accurate control coal-supplying amount, accomplishes that automatic energy saving runs.
The embodiment of the present invention additionally provides a kind of fluidized-bed combustion boiler burning optimization control set for adjusting, comprising: receiver module 21, for receiving the duty parameter of the parameter sensors collection that fluidized-bed combustion boiler is installed; Regulation and control module 22, for according to duty parameter and pre-set with the parameter range of operation corresponding to duty parameter, regulation and control are optimized to the water system of fluidized-bed combustion boiler and wind coal proportion; Wherein the water system regulation and control of fluidized-bed combustion boiler are comprised: steam water-level auto-control, main steam temperature auto-control; The wind coal proportion Optimum Regulation of fluidized-bed combustion boiler is comprised: combustion chamber draft auto-control, air output auto-control, bed temperature auto-control, bed of material differential pressure auto-control and boiler main-piping pressure auto-control.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (9)

1. a fluidized-bed combustion boiler burning optimization adjustment control method, is characterized in that, comprising:
Receive the duty parameter of the parameter sensors collection that fluidized-bed combustion boiler is installed;
According to described duty parameter and pre-set with the parameter range of operation corresponding to described duty parameter, regulation and control are optimized to the water system of described fluidized-bed combustion boiler and wind coal proportion;
Wherein the water system regulation and control of described fluidized-bed combustion boiler are comprised: steam water-level auto-control, main steam temperature auto-control; The wind coal proportion Optimum Regulation of described fluidized-bed combustion boiler is comprised: combustion chamber draft auto-control, air output auto-control, bed temperature auto-control, bed of material differential pressure auto-control and boiler main-piping pressure auto-control;
Wherein, to steam water-level auto-control, comprising:
According to feedwater flow, main steam flow, feed pressure determination feedwater flow regulation scope included in described duty parameter, comprising: when the flowed fluctuation of described main steam flow exceeds allowed band, according to the carbonated drink ratio of setting, determine feedwater flow regulation scope; Difference between described feed pressure and feed pressure setting value exceeds feed pressure difference allowed band, and the difference between described feedwater flow and feedwater flow setting value is when exceeding feedwater flow difference allowed band, according to described feedwater flow difference allowed band, determine feedwater flow regulation scope;
According to described feedwater flow regulation scope, generate feedwater flow regulation instruction, and described feedwater flow regulation instruction is sent to water-supply valve, to regulate and control the feedwater flow of described water-supply valve.
2. method according to claim 1, is characterized in that, to main steam temperature auto-control in the method, comprising:
Obtain the desuperheat temperature gap between attemperator outlet temperature included in described duty parameter and attemperator outlet temperature setting value;
When described desuperheat temperature gap exceeds desuperheat temperature gap allowed band, according to described desuperheat temperature gap allowed band, determine attemperator outlet temperature adjustable range;
According to described attemperator outlet temperature adjustable range, generate desuperheating water regulating command, and described desuperheating water regulating command is sent to Desuperheating water regulating valve, to regulate and control described attemperator outlet temperature.
3. method according to claim 1, is characterized in that, to combustion chamber draft auto-control in the method, comprising:
Obtain the absorbing quantity difference between absorbing quantity included in described duty parameter and absorbing quantity setting value;
When described absorbing quantity difference exceeds the absorbing quantity difference allowed band of setting, determine absorbing quantity adjustable range;
According to described absorbing quantity adjustable range, generate absorbing quantity regulating command, and described absorbing quantity regulating command is sent to air induction control system, to regulate and control the negative pressure in described fluid bed boiler furnace.
4. method according to claim 1, is characterized in that, to air output auto-control in the method, comprising:
Obtain the oxygen amount difference between Oxygen Amount in Flue Gas and oxygen amount setting value that described duty parameter comprises;
According to primary air flow included in described duty parameter and secondary air flow, obtain total air output in boiler;
Described oxygen amount difference is utilized to compensate air output total in described boiler;
Obtain the total blast volume difference between total air output and total air output setting value in the described boiler after compensating;
Generate air quantity regulating command according to described total blast volume difference, the bonded boiler type of furnace carries out proportioning to a secondary air flow, and described air quantity regulating command is sent to First air damper, secondary air regulation air door place carries out air volume control.
5. method according to claim 4, is characterized in that, the method also comprises:
Obtain the boiler load of work at present process;
According to described boiler load and the described oxygen amount setting value that pre-sets, determine steam flow control value, utilize described steam flow control value to revise described oxygen amount setting value.
6. method according to claim 1, is characterized in that, to bed temperature auto-control in the method, comprising:
When boiler load changes, according to the control value of the variable quantity determination primary air flow of boiler load;
According to the control value of described primary air flow, generate First air regulation and control instruction, and described First air regulation and control instruction is sent to First air damper place carries out primary air flow adjustment;
After described primary air flow regulates, obtain bed temperature changing value;
According to described bed temperature changing value, determine coal-supplying amount changing value;
According to described coal-supplying amount changing value regulation and control coal-supplying amount.
7. method according to claim 1, is characterized in that, to bed of material differential pressure auto-control in the method, comprising:
Obtain thickness of feed layer, according to the steam flow in air compartment temperature, bed temperature and boiler, determine that the bed of material regulates pressure, regulate thickness of feed layer described in pressure controlling according to the described bed of material.
8. method according to claim 1, is characterized in that, to boiler main-piping pressure auto-control in the method, comprising:
Obtain female pipe vapour pressure;
Obtain the main-piping pressure difference between described female pipe vapour pressure and main-piping pressure setting value;
When described main-piping pressure difference exceeds main-piping pressure difference allowed band, determine main-piping pressure regulated value;
According to described main-piping pressure regulated value, generate main-piping pressure regulating command;
Utilize described main-piping pressure regulating command, regulate coal supply system.
9. application rights requires a fluidized-bed combustion boiler burning optimization control set for adjusting for fluidized-bed combustion boiler burning optimization adjustment control method described in 1-8 any one, it is characterized in that, comprising:
Receiver module, for receiving the duty parameter of the parameter sensors collection that fluidized-bed combustion boiler is installed;
Regulation and control module, for according to described duty parameter and pre-set with the parameter range of operation corresponding to described duty parameter, regulation and control are optimized to the water system of described fluidized-bed combustion boiler and wind coal proportion; Wherein the water system regulation and control of described fluidized-bed combustion boiler are comprised: steam water-level auto-control, main steam temperature auto-control; The wind coal proportion Optimum Regulation of described fluidized-bed combustion boiler is comprised: combustion chamber draft auto-control, air output auto-control, bed temperature auto-control, bed of material differential pressure auto-control and boiler main-piping pressure auto-control.
CN201410495934.7A 2014-09-24 2014-09-24 Fluidized-bed combustion boiler burning optimization adjustment control method and device CN104197324B (en)

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CN106224947B (en) * 2016-08-04 2018-03-13 华北电力大学 The event-driven control system of Circulating Fluidized Bed Temperature based on feedback of status
CN106594700A (en) * 2016-12-27 2017-04-26 重庆智神科技有限公司 Boiler control system
CN109084324B (en) * 2018-07-19 2019-09-27 北京德普新源科技发展有限公司 The burning air quantity control system and control method of biomass boiler
CN110260356B (en) * 2019-07-15 2020-08-18 白海波 Energy-saving control method of fluidized bed boiler

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