CN104197324A - Combustion optimization regulating and controlling method and device of fluidized bed boiler - Google Patents
Combustion optimization regulating and controlling method and device of fluidized bed boiler Download PDFInfo
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- CN104197324A CN104197324A CN201410495934.7A CN201410495934A CN104197324A CN 104197324 A CN104197324 A CN 104197324A CN 201410495934 A CN201410495934 A CN 201410495934A CN 104197324 A CN104197324 A CN 104197324A
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Abstract
The invention relates to the technical field of combustion optimization regulating and controlling of fluidized bed boilers, in particular to a combustion optimization regulating and controlling method and a device of a fluidized bed boiler. The method comprises the steps of receiving working condition parameters gathered by a parameter sensor installed on the fluidized bed boiler, and performing optimization regulating and controlling on a water system of the fluidized bed boiler and air-coal ratio according to the working condition parameters and a preset parameter operation range corresponding to the working condition parameters, wherein the regulating and controlling on the water system of the fluidized bed boiler comprises drum water level automatic regulating and controlling and main steam temperature automatic regulating and controlling; the optimization regulating and controlling on the air-coal ratio of the fluidized bed boiler comprises furnace draft automatic regulating and controlling, air output automatic regulating and controlling, bed temperature automatic regulating and controlling, material bed pressure difference automatic regulating and controlling and boiler header pressure automatic regulating and controlling. The method and the device realize the automatic regulating and optimizing of the water system and the air-coal ratio of the fluidized bed boiler, and reduce the influence by artificial regulating and controlling factors through automatic regulating and controlling.
Description
Technical field
The present invention relates to fluidized-bed combustion boiler burning optimization and regulate control technology 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 energy resources occupancy volume and consumption figure are far below world average level per capita.Chinese energy develops and presents following main feature:
The one, the energy is taking coal as main, and it is very low that renewable resource develops degree.The coal resources that China is verified account for the more than 90% of primary energy total amount such as coal, oil, natural gas, water energy and nuclear energy, and coal is dominant in Chinese energy is produced and consumed.At world energy sources by coal be main be in main Structure Transformation process to oil gas, China is still in the world the several energy of only a few taking coal as one of main country.
The 2nd, 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 lasting ascendant trend.
Resource environment restriction is the conspicuous contradiction that current China socio-economic development faces.Solving energy-conserving and environment-protective problem, is to expand domestic demand, steady growth, tune structure, makes an important and pressing task of China's economic upgrade version.Accelerate development energy-conserving and environment-protective industry, to pulling investment and consumption, form new growth engines, promoting industrial upgrading and development pattern changes, promote energy-saving and emission-reduction and the people's livelihood to improve, 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 the control of dcs DCS system, 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, thereby 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.
A kind of fluidized-bed combustion boiler burning optimization adjustment control method is provided in an embodiment of the present invention, has comprised: the duty parameter that receives the parameter sensors collection of installing on fluidized-bed combustion boiler; According to described duty parameter and set in advance with the corresponding parameter range of operation of described duty parameter, water system and wind coal proportion to described fluidized-bed combustion boiler are optimized regulation and control; 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; Wind coal proportion Optimum Regulation to described fluidized-bed combustion boiler comprises: 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, in the method to steam water-level auto-control, comprise: determine feedwater flow regulation scope according to feedwater flow included in described duty parameter, main steam flow, feed pressure, comprising: in the time that 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 when the difference between described feedwater flow and feedwater flow setting value exceeds 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, in the method, to main steam temperature auto-control, comprising: obtain the desuperheat temperature gap between attemperator outlet temperature included in described duty parameter and attemperator outlet temperature setting value; In the time that 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, in the method, to combustion chamber draft auto-control, comprising: obtain the air inducing amount difference between air inducing amount included in described duty parameter and air inducing amount setting value; In the time that described air inducing amount difference exceeds the air inducing amount difference allowed band of setting, determine air inducing amount adjustable range; According to described air inducing amount adjustable range, generate the regulating command of air inducing amount, and the regulating command of described air inducing amount is sent to air output control system, to regulate and control the negative pressure in described fluid bed boiler furnace.
Preferably, in the method, to air output auto-control, comprising: obtain the oxygen amount difference between Oxygen Amount in Flue Gas and the 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; Utilize described oxygen amount difference to compensate total air output in described boiler; Obtain always air output and always the total blast volume difference between 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 is carried out proportioning to a secondary air flow, and described air quantity regulating command is sent to wind damper, a secondary air regulation air door place carries out air volume control.
Preferably, the method also comprises: the boiler load that obtains work at present process; According to described boiler load and the described oxygen amount setting value that sets in advance, determine steam flow control value, utilize described steam flow control value to revise described oxygen amount setting value.
Preferably, in the method, to bed temperature auto-control, comprising: in the time that boiler load changes, determine the control value of primary air flow according to the variable quantity of described boiler load; According to the control value of described primary air flow, generate one time wind regulation and control instruction, and a described wind regulation and control instruction is sent to a wind damper place carries out primary air flow adjusting; Described primary air flow obtains bed temperature changing value after regulating; 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, in the method, to bed of material differential pressure auto-control, 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, according to thickness of feed layer described in described bed of material adjusting pressure controlling.
Preferably, in the method, to boiler main-piping pressure auto-control, comprising: obtain female pipe vapour pressure; Obtain the main-piping pressure difference between described female pipe vapour pressure and main-piping pressure setting value; In the time that 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 also 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 of installing on fluidized-bed combustion boiler; Regulation and control module, for according to described duty parameter and set in advance with the corresponding parameter range of operation of described duty parameter, water system and wind coal proportion to described fluidized-bed combustion boiler are optimized regulation and control; 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; Wind coal proportion Optimum Regulation to described fluidized-bed combustion boiler comprises: 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 and device that the embodiment of the present invention provides, 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, thereby realize fluidized-bed combustion boiler water system and wind coal proportion and automatically regulate optimization, and in the auto-control process of fluidized-bed combustion boiler according to duty parameter auto-control, reduce the impact of artificial regulatory factor, coal-air ratio is regulated and controled more accurately and timely, make coal-air ratio remain under comparatively rational proportioning state simultaneously, thereby 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.
Brief description of the drawings
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 of air output control in the embodiment of the present invention;
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.
The embodiment of the present invention provides a kind of fluidized-bed combustion boiler burning optimization adjustment control method, and as shown in Figure 1, main treatment step comprises:
Step S11: the duty parameter that receives the parameter sensors collection of installing on fluidized-bed combustion boiler;
Step S12: according to duty parameter and set in advance with the corresponding parameter range of operation of duty parameter, water system and wind coal proportion to fluidized-bed combustion boiler are optimized regulation and control;
Wherein the water system regulation and control of fluidized-bed combustion boiler are comprised: steam water-level auto-control, main steam temperature auto-control; Wind coal proportion Optimum Regulation to fluidized-bed combustion boiler comprises: 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, thereby water system and the wind coal proportion of realizing fluidized-bed combustion boiler regulate optimization automatically, and in the auto-control process of fluidized-bed combustion boiler according to duty parameter auto-control, reduce the impact of artificial regulatory factor, coal-air ratio is regulated and controled more accurately and timely, make coal-air ratio remain under comparatively rational proportioning state simultaneously, thereby 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 has reflected the equilibrium relation of Boiler Steam load and confluent indirectly, be a very important monitoring parameter in boiler operatiopn, keeping steam water-level is normally the essential condition that ensures steam turbine and safe operation of the boiler.Steam water-level too high can affect the normal work of water separator in drum, cause to export steam excess moisture and make the fouling of superheater tube wall, easily cause superheater to burn out.Steam water-level is too low, may destroy boiler water cycle, causes water screen tube to burn out and breaks.
For keeping the stable and carbonated drink balance of steam water-level, in this method, steam water-level is carried out to auto-control, concrete regulate and control method comprises: determine feedwater flow regulation scope according to feedwater flow included in duty parameter, main steam flow, feed pressure, comprising: in the time that 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 when the difference between feedwater flow and feedwater flow setting value exceeds 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, can keep the stable and carbonated drink balance of steam water-level in fluidized-bed combustion boiler, make steam water-level at the upper and lower slight fluctuation of a certain setting value, and the method that adopts this kind of steam water-level auto-control also effectively alleviated operating personnel and manually control the hard work that water level brings, reduce corresponding potential safety hazard.
In service at fluidized-bed combustion boiler, the temperature of superheated steam is the highest.When normal operation, superheater temperature just approaches the permission maximum temperature of its material.Higher temperature of Overheated Steam, can make superheater pipe accelerate distortion or damage, so that cause the accident too early.And superheated steam steam temperature is too low, can reduce the thermal efficiency of unit, 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 that affects thermal power plant safe operation and economic benefit.
For realizing the auto-control to superheat steam temperature, in the present invention, to main steam temperature auto-control, concrete methods of realizing is: obtain the desuperheat temperature gap between attemperator outlet temperature included in duty parameter and attemperator outlet temperature setting value; In the time that 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, can control the temperature of superheated steam, rationally regulate warm water flow, saving water resource, reduce hot working fluid loss, guarantee the long-time safety and economic operation of boiler, and can also reduce operations staff's labour intensity to Boiler Steam Temperature auto-control, reduce the impact of artifact in regulation process.
Fluidized-bed combustion boiler is in service, and the task of air output control system is to ensure certain combustion chamber draft power, and the too little malleation that even becomes of combustion chamber draft can make the interior flame of burner hearth and flue gas excessive from measuring point hole and furnace wall gap, affects equipment and personal security.And combustion chamber draft is crossed conference a large amount of cold airs is entered in stove, increase air-introduced machine load and heat loss due to exhaust gas, when serious, even cause furnace explosion.
In this method, the concrete grammar of combustion chamber draft auto-control is comprised: obtain the air inducing amount difference between air inducing amount included in duty parameter and air inducing amount setting value; In the time that air inducing amount difference exceeds the air inducing amount difference allowed band of setting, determine air inducing amount adjustable range; According to air inducing amount adjustable range, generate the regulating command of air inducing amount, and the regulating command of air inducing amount is sent to air output 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 smoothly, steadily, drop into for a long time, reduces the exhaust gas temperature too high loss causing.For accurate control combustion, energy-conservation creation technical conditions.Air inducing drops into after Automatic Optimal regulates and will eliminate the negative pressure large phenomenon that fluctuates, and makes 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 the gain of controlled plant to compensate.In oxygen content-air system, the set-point of oxygen amount is not often got constant, but along with the load variations of boiler.This is that when load increases, best oxygen content reduces because best oxygen content is relevant with boiler load, and this can be by revising to ensure to 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 realizes after Automatic Optimal adjusting, makes coal-air ratio reach optimum optimization fired state, and lime-ash carbon containing index is dropped in rational scope, also guarantees steam generator system safe and stable operation simultaneously.
Air quantity control principle based on above-mentioned, to air output auto-control, as shown in Figure 2, comprising in this method: obtain the oxygen amount difference between Oxygen Amount in Flue Gas and the oxygen amount setting value that duty parameter comprises; According to primary air flow included in duty parameter and secondary air flow, obtain total air output in boiler; Profit oxygen consuming amount difference compensates total air output in boiler; Obtain always air output and always the total blast volume difference between air output setting value in the boiler after compensation; Generate air quantity regulating command according to total blast volume difference, the bonded boiler type of furnace is carried out proportioning to a secondary air flow, and described air quantity regulating command is sent to wind damper, a secondary air regulation air door place carries out air volume control.
As shown in Figure 2, this loop adopts tandem to regulate, 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, air output is done to a Secondary Air proportioning (boiler type difference, proportioning parameter difference), calculate controlled secondary air flow size, adjust secondary air flow by secondary air regulation air door.
In to the auto-control of air output, also comprise: the boiler load that obtains work at present process; According to boiler load and the oxygen amount setting value that sets in advance, determine steam flow control value, utilize steam flow control value to revise oxygen amount setting value.
Fluidized boiler in service, the bed temperature of recirculating fluidized bed is a very important control parameter, it directly affects the safe and continuous of boiler and moves, in to the auto-control of bed temperature, quote the combustion control system of " bed temperature conditioning signal 3 ", can make bed temperature better be controlled and be conducive to the safe and continuous operation of boiler.
In this method, to bed temperature auto-control, comprising: in the time that boiler load changes, determine the control value of primary air flow according to the variable quantity of boiler load; According to the control value of primary air flow, generate one time wind regulation and control instruction, and a wind regulation and control instruction is sent to a wind damper place carries out primary air flow adjusting; Primary air flow obtains bed temperature changing value after regulating; 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, in the time that boiler load changes, first change primary air flow, subsequently due to the variation of bed temperature, burning self-regulation coal-supplying amount changes, and automatic combustion regulating system is moved in advance and adapt to rapidly the requirement of load variations.
As shown in Figure 3, maximum is got to the bed temperature value of multiple bed temperature measurement points in this loop, and bad point is excised, the bed temperature maximum of utilizing bed temperature setting value and get is carried out bed temperature optimization, wherein, in bed temperature auto-control process, introduce the rear steam flow 1 of compensation, primary air flow, bed temperature conditioning signal 3 and relevant auxiliary parameter bed temperature is optimized to adjusting.
In said method, in the time that coal-supplying amount changes, when spontaneous disturbance occurs coal supply side, now utilize bed temperature signal can react soon coal supply disturbance to eliminate in time the spontaneous disturbance of coal supply.Realize the control of bed temperature Automatic Optimal and be ensureing that bed temperature is in operation and remain optimum state, to guarantee that when the load variations fuel can fully burning under best combustion environment, also ensured 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 operation of the safe and continuous of boiler are closely related, and bed pressure-controlled controls thickness of feed layer.The bed of material is too thick, a wind " public attention " can be pushed down, and makes 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, secondly can make a wind penetrate the bed of material and blow out stove fire.
In this method, to bed of material differential pressure auto-control, 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, regulates pressure controlling thickness of feed layer according to the bed of material.The control of bed of material differential pressure automatic optimal makes bed of material differential pressure reach optimal value after dropping into, and makes boiler enter efficient state simultaneously, reduces ash content carbon.
As shown in Figure 4, in the actual regulation process of bed of material pressure reduction, bed of material pressure reduction loop gathers the bed of material pressure reduction of multiple measurement points, and the bed of material pressure reduction obtaining is averaged; In the regulation process of bed of material pressure reduction, also need to gather the air compartment temperature of multiple measurement points, 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 Isoquants to realize the auto-control of bed temperature simultaneously.The auto-control that utilizes 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 that concrete grammar is to boiler main-piping pressure auto-control: obtain female pipe vapour pressure; Obtain the main-piping pressure difference between female pipe vapour pressure and main-piping pressure setting value; In the time that 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 switch with single stove adjusting, can select female pipe to coordinate or two kinds of optimized Control Mode of single stove adjusting.When as the female pipe optimal control of many boilers, in conjunction with each single stove main vapour pressure difference, each boiler carried out to pressure distribution, each boiler is according to the pressure parameter of female pipe coordinated allocation automatically adjust feeder and garbage feeder (garbage feeder control loop can be removed for the boiler that does not burn rubbish), wherein regulate in feeder and garbage feeder process automatic, introduce steam flow 2 and bed temperature and regulate 3 relevant parameter, so that adjustment process is more reasonable.
The basic task that boiler combustion process regulates automatically, is to make the heat that fuel combustion provides adapt to the needs that Boiler Steam is loaded, and also should ensure 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 connected mode (unit system, piping-main scheme) of steam turbine etc.The main task that boiler combustion regulates is to maintain boiler export steam pressure constant.The reacting condition of vapour pressure steam production and the steam turbine steam consumption of boiler incompatible.Therefore, maintain vapour pressure, must correspondingly change combustion rate, make the steam production of boiler can adapt to the needs of external load.Drop into after Automatic Optimal adjusting in coal supply loop, will make coal-air ratio reach best combustion ratio, makes burning more abundant, makes boiler combustion situation reach desirable operation conditions.Accurately control coal-supplying amount, accomplish automatic energy saving operation.
The embodiment of the present invention also 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 of installing on fluidized-bed combustion boiler; Regulation and control module 22, for according to duty parameter and set in advance with the corresponding parameter range of operation of duty parameter, water system and wind coal proportion to fluidized-bed combustion boiler are optimized regulation and control; Wherein the water system regulation and control of fluidized-bed combustion boiler are comprised: steam water-level auto-control, main steam temperature auto-control; Wind coal proportion Optimum Regulation to fluidized-bed combustion boiler comprises: 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 of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
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 of installing on fluidized-bed combustion boiler;
According to described duty parameter and set in advance with the corresponding parameter range of operation of described duty parameter, water system and wind coal proportion to described fluidized-bed combustion boiler are optimized regulation and control;
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; Wind coal proportion Optimum Regulation to described fluidized-bed combustion boiler comprises: 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.
2. method according to claim 1, is characterized in that, in the method, to steam water-level auto-control, comprising:
Determine feedwater flow regulation scope according to feedwater flow included in described duty parameter, main steam flow, feed pressure, comprising: in the time that 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 when the difference between described feedwater flow and feedwater flow setting value exceeds 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.
3. method according to claim 1, is characterized in that, in the method, to main steam temperature auto-control, comprising:
Obtain the desuperheat temperature gap between attemperator outlet temperature included in described duty parameter and attemperator outlet temperature setting value;
In the time that 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.
4. method according to claim 1, is characterized in that, in the method, to combustion chamber draft auto-control, comprising:
Obtain the air inducing amount difference between air inducing amount included in described duty parameter and air inducing amount setting value;
In the time that described air inducing amount difference exceeds the air inducing amount difference allowed band of setting, determine air inducing amount adjustable range;
According to described air inducing amount adjustable range, generate the regulating command of air inducing amount, and the regulating command of described air inducing amount is sent to air output control system, to regulate and control the negative pressure in described fluid bed boiler furnace.
5. method according to claim 1, is characterized in that, in the method, to air output auto-control, comprising:
Obtain the oxygen amount difference between Oxygen Amount in Flue Gas and the 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;
Utilize described oxygen amount difference to compensate total air output in described boiler;
Obtain always air output and always the total blast volume difference between 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 is carried out proportioning to a secondary air flow, and described air quantity regulating command is sent to wind damper, a secondary air regulation air door place carries out air volume control.
6. method according to claim 5, 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 sets in advance, determine steam flow control value, utilize described steam flow control value to revise described oxygen amount setting value.
7. method according to claim 1, is characterized in that, in the method, to bed temperature auto-control, comprising:
In the time that boiler load changes, determine the control value of primary air flow according to the variable quantity of described boiler load;
According to the control value of described primary air flow, generate one time wind regulation and control instruction, and a described wind regulation and control instruction is sent to a wind damper place carries out primary air flow adjusting;
Described primary air flow obtains bed temperature changing value after regulating;
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.
8. method according to claim 1, is characterized in that, in the method, to bed of material differential pressure auto-control, 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, according to thickness of feed layer described in described bed of material adjusting pressure controlling.
9. method according to claim 1, is characterized in that, in the method, to boiler main-piping pressure auto-control, comprising:
Obtain female pipe vapour pressure;
Obtain the main-piping pressure difference between described female pipe vapour pressure and main-piping pressure setting value;
In the time that 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.
10. a fluidized-bed combustion boiler burning optimization control set for adjusting, is characterized in that, comprising:
Receiver module, for receiving the duty parameter of the parameter sensors collection of installing on fluidized-bed combustion boiler;
Regulation and control module, for according to described duty parameter and set in advance with the corresponding parameter range of operation of described duty parameter, water system and wind coal proportion to described fluidized-bed combustion boiler are optimized regulation and control; 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; Wind coal proportion Optimum Regulation to described fluidized-bed combustion boiler comprises: 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.
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| CN (1) | CN104197324B (en) |
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| CN105159250A (en) * | 2015-08-14 | 2015-12-16 | 中国神华能源股份有限公司 | Air quantity and drum water level calculation method/device of power plant DCS |
| CN106224947A (en) * | 2016-08-04 | 2016-12-14 | 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 |
| CN106765069A (en) * | 2016-11-25 | 2017-05-31 | 浦北县科学技术开发中心 | Coal electricity generation boiler control system |
| CN107355813A (en) * | 2017-07-21 | 2017-11-17 | 江苏永钢集团有限公司 | Gas boiler burns furnace control system automatically |
| CN110260356A (en) * | 2019-07-15 | 2019-09-20 | 白海波 | A kind of energy-saving control method of fluidized-bed combustion boiler |
| WO2020015694A1 (en) * | 2018-07-19 | 2020-01-23 | 德普新源（香港）有限公司 | Combustion air volume control system and method for biomass boiler |
| CN111602004A (en) * | 2017-11-29 | 2020-08-28 | 川崎重工业株式会社 | Fluidized bed monitoring method and apparatus |
| CN112097253A (en) * | 2020-08-27 | 2020-12-18 | 中节能(肥城)生物质能热电有限公司 | Method for improving combustion efficiency of circulating fluidized bed boiler |
| CN112197262A (en) * | 2020-10-24 | 2021-01-08 | 四川泸天化创新研究院有限公司 | Intelligent control method for coal-fired boiler of circulating fluidized bed |
| CN114673981A (en) * | 2022-04-25 | 2022-06-28 | 四川泸天化创新研究院有限公司 | Advanced control system and control method for boiler plant |
| CN116906887A (en) * | 2023-07-05 | 2023-10-20 | 上海全应科技有限公司 | Intelligent control device of fluidized bed boiler combustion system |
| CN114673981B (en) * | 2022-04-25 | 2024-04-30 | 四川泸天化创新研究院有限公司 | Advanced control system and control method for boiler device |
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| CN105159250A (en) * | 2015-08-14 | 2015-12-16 | 中国神华能源股份有限公司 | Air quantity and drum water level calculation method/device of power plant DCS |
| CN105159250B (en) * | 2015-08-14 | 2017-11-07 | 中国神华能源股份有限公司 | The air quantity and steam water-level computational methods and device of a kind of Power Plant DCS System |
| CN106224947A (en) * | 2016-08-04 | 2016-12-14 | 华北电力大学 | The event-driven control system of Circulating Fluidized Bed Temperature based on feedback of status |
| CN106765069A (en) * | 2016-11-25 | 2017-05-31 | 浦北县科学技术开发中心 | Coal electricity generation boiler control system |
| CN106594700A (en) * | 2016-12-27 | 2017-04-26 | 重庆智神科技有限公司 | Boiler control system |
| CN107355813A (en) * | 2017-07-21 | 2017-11-17 | 江苏永钢集团有限公司 | Gas boiler burns furnace control system automatically |
| CN111602004A (en) * | 2017-11-29 | 2020-08-28 | 川崎重工业株式会社 | Fluidized bed monitoring method and apparatus |
| CN111602004B (en) * | 2017-11-29 | 2022-08-12 | 川崎重工业株式会社 | Fluidized bed monitoring method and apparatus |
| WO2020015694A1 (en) * | 2018-07-19 | 2020-01-23 | 德普新源（香港）有限公司 | Combustion air volume control system and method for biomass boiler |
| CN110260356A (en) * | 2019-07-15 | 2019-09-20 | 白海波 | A kind of energy-saving control method of fluidized-bed combustion boiler |
| CN112097253A (en) * | 2020-08-27 | 2020-12-18 | 中节能(肥城)生物质能热电有限公司 | Method for improving combustion efficiency of circulating fluidized bed boiler |
| CN112097253B (en) * | 2020-08-27 | 2022-06-03 | 中节能(肥城)生物质能热电有限公司 | Method for improving combustion efficiency of circulating fluidized bed boiler |
| CN112197262A (en) * | 2020-10-24 | 2021-01-08 | 四川泸天化创新研究院有限公司 | Intelligent control method for coal-fired boiler of circulating fluidized bed |
| CN112197262B (en) * | 2020-10-24 | 2023-06-27 | 四川泸天化创新研究院有限公司 | Intelligent control method for circulating fluidized bed coal-fired boiler |
| CN114673981A (en) * | 2022-04-25 | 2022-06-28 | 四川泸天化创新研究院有限公司 | Advanced control system and control method for boiler plant |
| CN114673981B (en) * | 2022-04-25 | 2024-04-30 | 四川泸天化创新研究院有限公司 | Advanced control system and control method for boiler device |
| CN116906887A (en) * | 2023-07-05 | 2023-10-20 | 上海全应科技有限公司 | Intelligent control device of fluidized bed boiler combustion system |
| CN116906887B (en) * | 2023-07-05 | 2024-04-02 | 上海全应科技有限公司 | Intelligent control device of fluidized bed boiler combustion system |
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