CN101943397A - Control system for pulverized coal boiler system - Google Patents
Control system for pulverized coal boiler system Download PDFInfo
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- CN101943397A CN101943397A CN 201010299548 CN201010299548A CN101943397A CN 101943397 A CN101943397 A CN 101943397A CN 201010299548 CN201010299548 CN 201010299548 CN 201010299548 A CN201010299548 A CN 201010299548A CN 101943397 A CN101943397 A CN 101943397A
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Abstract
The invention discloses a control system for a pulverized coal boiler, which aims to solve the problems of poor coal-fired economy and unstable combustion of the pulverized coal boiler in the prior art. The system comprises a water system unit control system, a dust-removal unit control system, a dust storing and supplying unit control system and a pulverized coal boiler combustion unit control system. By adopting the technical scheme of the invention, the control system contributes to the improvement of the coal-fired economy of the pulverized coal boiler and stable combustion and higher combustion efficiency of the pulverized coal boiler.
Description
Technical field
The present invention relates to the Industrial Boiler Technology field, relate to a kind of control system of pulverized-coal fired boiler especially.
Background technology
Industrial Boiler is the important motivity equipment in the production process, and the quality of its control quality directly has influence on the stability of relevant apparatus production process.At present, the industry boiler control system kind is a lot, but existing control system has only realized that basic data show and the start and stop of motor, can't guarantee the efficient stable operation of boiler.
The pulverized-coal fired boiler that is applied to industry is the novel coal boiler that occurred in recent years, and this boiler mainly is coal cinder to be ground to form fine coal by air-flow fine coal is imported pulverized-coal fired boiler then and burn, and it has the efficiency of combustion height, can promptly open a lot of characteristics such as promptly stop.The boiler of current combustion fine coal also has the used generating coal-burning boiler of thermal power station, and its coal consumption is bigger, and is lower with respect to industrial coal powder boiler for the requirement of combustion stability.
Compare with the generating coal-burning boiler, the industrial coal powder boiler coal consumption is less, and is higher to the requirement of combustion stability, but at present for the control technology prematurity still of the pulverized-coal fired boiler that is applied to industry, the stability of coal powder boiler combustion is not enough, and efficient is also lower.
Effective solution does not appear in the problem that stability is not enough, efficiency of combustion is lower of the coal powder boiler combustion that exists in the application reality for industrial coal powder boiler at present as yet.
Summary of the invention
Main purpose of the present invention is the control system that proposes a kind of pulverized-coal fired boiler, with the problem that stability is not enough, efficiency of combustion is lower of the coal powder boiler combustion of pulverized-coal fired boiler in the solution prior art.
For addressing the above problem, according to an aspect of the present invention, provide a kind of control system of pulverized-coal fired boiler.
The control system of pulverized-coal fired boiler of the present invention, comprise that water system unit control system, dust removing units control system, storage powder are for powder unit control system and coal powder boiler combustion unit control system, wherein: described water system unit control system, supply water to boiler water tank according to the boiler water tank liquid level control water softener that detects, make the boiler water tank water level remain on preset range; Described dust removing units control system is according to pressure reduction control magnetic valve winding-up cloth bag before and after the sack cleaner that detects; Described storage powder is connected with storage powder powder feeder unit for the powder unit control system, supplies fine coal according to the big material bin of the Weight control storage powder powder feeder unit of the intermediate bunker of the storage powder powder feeder unit that detects to described intermediate bunker; The coal powder boiler combustion unit control system is regulated wind supply quantity and fine coal supply to pulverized-coal fired boiler according to the flame intensity of the pulverized-coal fired boiler that detects.
Further, also comprise boiler combustion diagnosis unit control system, be used for: Industrial Analysis data and pulverized-coal fired boiler floor data according to coal dust draw pulverized-coal fired boiler efficient and output; Alarm signal according to described pulverized-coal fired boiler efficient and described pulverized-coal fired boiler draws information and accident analysis information and the output that is used to optimize burning.
Further, described storage powder comprises first jockey, second jockey and weighing device for the powder unit control system, in first jockey and second jockey valve is installed, and: described big material bin is communicated with by first jockey with intermediate bunker, described intermediate bunker is communicated with the coal burner of described pulverized-coal fired boiler by second jockey, described intermediate bunker is connected with weighing device, first jockey and second jockey are flexible apparatus, make described weighing device measure the weight and the transmission weight signal of intermediate bunker.
Further, described storage powder also comprises high charge level sensor and the low level sensor that is installed in the described big material bin for the powder unit control system, and: the high charge level sensor is used for sending signal to described control device when the setting height(from bottom) of the height arrival high charge level sensor of the fine coal accumulation of big material bin; Low level sensor is used for sending signal to described control device when the setting height(from bottom) of the too late low level sensor of height of the fine coal accumulation of big material bin.
Further, described storage powder also comprises the temperature detection part that is installed in the big material bin for the powder unit control system, is used to detect the temperature in the big material bin and send temperature signal.
Further, described storage powder also comprises the one or more fluidisation parts that are installed in the described big material bin for the powder unit control system, avoids caking thereby described fluidisation parts flow the interior fine coal of described big material bin.
Further, described coal powder boiler combustion unit control system comprises gas flowmeter.
Further, described coal powder boiler combustion unit control system comprises temperature measuring equipment or pressure tester, is respectively applied for the leaving water temperature or the steam pressure that detect pulverized-coal fired boiler.
Further, described coal powder boiler combustion unit control system comprises the flue gas checkout gear, is used to detect the oxygen content of pulverized-coal fired boiler tail flue gas.
Further, described coal powder boiler combustion unit control system comprises the combustion chamber draft checkout gear, is used to detect the combustion chamber draft of described pulverized-coal fired boiler.
According to technical scheme of the present invention, storage powder powder feeder unit has adopted big material bin and intermediate bunker two parts, and, utilize weighing device and control device that the weight of intermediate bunker is kept within the specific limits, thereby control is to the even feeding of coal powder fired boiler burner with the flexible apparatus connection; Re-use flame detecting device, wind feeding mechanism and secondary wind feeding mechanism monitoring flame combustion state.Like this, the burning that has improved the coal-fired economy of pulverized-coal fired boiler and helped pulverized-coal fired boiler is stable more, efficiency of combustion is higher.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is according to the signals collecting of the control system of the pulverized-coal fired boiler of the embodiment of the invention and the schematic diagram of processing;
Fig. 2 is the schematic diagram according to the structure of the control system of the pulverized-coal fired boiler of the embodiment of the invention;
Fig. 3 is the flow chart according to the water system unit controls of the embodiment of the invention;
Fig. 4 is the flow chart according to the dust removing units control of the embodiment of the invention;
Fig. 5 A is according to the storage powder powder feeder unit of the embodiment of the invention and stores up the schematic diagram of powder for the powder unit control system;
Fig. 5 B is the schematic diagram according to the sensor installation site of the embodiment of the invention;
Fig. 5 C is the schematic diagram according to the fluidisation component installation state of the embodiment of the invention;
Fig. 6 A is the schematic diagram according to the powder storehouse material loading process control of the embodiment of the invention;
Fig. 6 B is the schematic diagram according to the intermediate bunker blanking process control of the embodiment of the invention;
Fig. 7 is the schematic diagram that transmits according to the signal in the method for controlling combustion of the pulverized-coal fired boiler of the embodiment of the invention; And
Fig. 8 is the schematic diagram according to the method for controlling combustion key step of the pulverized-coal fired boiler of the embodiment of the invention.
The specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 1 is according to the signals collecting of the control system of the pulverized-coal fired boiler of the embodiment of the invention and the schematic diagram of processing.
As shown in Figure 1, the control system of the pulverized-coal fired boiler in the present embodiment, comprise a plurality of unit controls, for the stability that guarantees to control, employing is that host computer is operated automatically, host computer manual operation and operating desk local operation three cover redundant operation modes, wherein operating desk local operation priority level is the highest, secondly is that host computer manual operation and host computer are operated automatically.For anti-stop signal disturbs, measuring cell is to become on the spot and send output, and signal cable is selected shielded cable for use, is protection PLC, and all AI all have signal isolator.Its operation principle is: PLC is a core, accept analog quantity and switching value signal that the one-shot measurement element sends, according to coding and by with the human-machine interactive information of host computer, after the integrated treatment, send analog signals and switching value signal and give executing agency to realize the control function.Host computer and PLC carry out information and pass mutually, and it realizes friendly human-computer interaction function by configuration software, and configuration software can embed other professional softwares to realize some specific function, and host computer is realized functions such as printing reports simultaneously.
Fig. 2 is the schematic diagram according to the structure of the control system of the pulverized-coal fired boiler of the embodiment of the invention.
As shown in Figure 2, comprise mainly in the control system of the pulverized-coal fired boiler of the embodiment of the invention that water system unit control system, dust removing units control system, storage powder are for powder unit control system and coal powder boiler combustion unit control system.
The water system unit control system supplies water to boiler water tank according to the boiler water tank liquid level control water softener that detects, and makes the boiler water tank water level remain on preset range; The dust removing units control system is according to pressure reduction control magnetic valve winding-up cloth bag before and after the sack cleaner that detects; The storage powder is connected with storage powder powder feeder unit for the powder unit control system, supplies fine coal according to the big material bin of the Weight control storage powder powder feeder unit of the intermediate bunker of the storage powder powder feeder unit that detects to described intermediate bunker; The coal powder boiler combustion unit control system is regulated wind supply quantity and fine coal supply to pulverized-coal fired boiler according to the flame intensity of the pulverized-coal fired boiler that detects.
Fig. 3 is the flow chart according to the water system unit controls of the embodiment of the invention.In the water system unit controls of the embodiment of the invention, the boiler elevated tank has high and low two liquid level signals respectively, the start and stop of two liquid level signals control water softener, thereby guarantee water tank water amount, low liquid level signal shows water tank water deficiency, need to start the water softener moisturizing, high liquid level signal is used to stop water softener.
Fig. 4 is the flow chart according to the dust removing units control of the embodiment of the invention.The dust removing units of the embodiment of the invention adopts the sack cleaner dedusting, be arranged on differential pressure transmitter on the sack cleaner, measure the pressure reduction of deduster cloth bag front and back in real time, and send a signal to pulse control instrument, pulse control instrument is by the winding-up cycle, parameter control magnetic valve winding-up cloth bags such as winding-up interval and winding-up time, when dust stratification was too much in the ash bucket, grey level-sensing device was realized automatic ash-discharging to signal to unloading grey revolving valve.
Below in conjunction with Fig. 5 A, the storage powder of the embodiment of the invention is described for powder unit control system and storage powder powder feeder unit.Fig. 5 A is according to the storage powder powder feeder unit of the embodiment of the invention and stores up the schematic diagram of powder for the powder unit control system.
Shown in Fig. 5 A, storage powder powder feeder unit 20 comprises by jockey 24 big material bin 21 and the intermediate bunker 22 that are communicated with of pipeline for example, in the jockey 24 valve is installed, and enters intermediate bunker 22 with control fine coal.The coal burner 23 (not completely shown among the figure) of intermediate bunker 22 and pulverized-coal fired boiler by jockey 25 for example pipeline be communicated with, in the jockey 25 valve is installed, enter coal burner 23 with control fine coal.
Under the weight of intermediate bunker 22 is in situation in the controlled area charactert, fine coal wherein is because the gravity effect enters into the also comparatively even weighing apparatus of the speed of coal burner 23, make that the fine coal quantity delivered amplitude of variation of coal burner is less, help to improve its coal-fired economy.
Fine coal in the intermediate bunker 22 is to come from big material bin 21, and the fine coal in the big material bin 21 comes from the outside.Can adopt some sensors to detect the amount of fine coal in the big material bin 21, it is in the certain limit.Fig. 5 B is the schematic diagram according to the sensor installation site of the embodiment of the invention.Shown in Fig. 5 B, in the big material bin 21 of storage powder powder feeder unit 20 high charge level sensor 31 and low level sensor 32 have been installed in the present embodiment, high charge level sensor 31 is used for sending signal when the setting height(from bottom) of the height arrival high charge level sensor 31 of the fine coal accumulation of big material bin 21; Low level sensor 32 is used for sending signal when the setting height(from bottom) of the too late low level sensor 21 of height of the fine coal accumulation of big material bin 21.
There are many sensors can realize the above-mentioned functions of high charge level sensor 31 and low level sensor 32.
For example, the blade that includes the storage powder space that probes into big material bin 21 in high charge level sensor 31 or the low level sensor 32, this blade did not keep rotation when fine coal buried this blade in big material bin 21, the stall because this blade is blocked when fine coal does not bury this blade in big material bin 21; High charge level sensor 31 or low level sensor 32 send signal when the rotary state of blade changes.This blade can be by motor-driven, and the torque magnitude of motor should be suitable, that is to say that when blade was buried by fine coal, the torsion of motor should be not enough to resist the obstruction of fine coal, and blade just stops operating like this.
And for example, comprise inductive means in high charge level sensor 31 or the low level sensor 32, whether the storage powder space that is used for detecting big material bin 21 has object approaching; High charge level sensor 31 when inductive means sensed object near the time send signal; Low level sensor 32 has been sensed when inductive means and has been sent signal when object leaves.The inductive means here is similar to the inductive means of more existing automatic flushing devices, as the people near time bath or bath when having the people to leave.
Because the fine coal that stores in the big material bin 21 might lump owing to the deadweight of fine coal, especially under the damp situation of fine coal, the possibility of caking increases.Caking is unfavorable for that fine coal to the flowing freely of intermediate bunker 22, can influence the stability of intermediate bunker 22 weight, and then can have influence on from middle feed bin 22 to coal burner 23.For this reason, in the present embodiment, adopt the fluidisation parts to avoid above-mentioned caking.Fig. 5 C is the schematic diagram according to the fluidisation component installation state of the embodiment of the invention.
Shown in Fig. 5 C, in embodiments of the present invention, in the big material bin 21 of storage powder powder feeder unit 20 one or more fluidisation parts are installed, there is shown the situation that two fluidisation parts are installed, be respectively fluidisation parts 41 and fluidisation parts 42.The fluidisation parts preferably are installed near the bottom of big material bin 21, shown in Fig. 5 C, because the caking possibility in this place is bigger.
The fluidisation parts also can be selected multiple concrete device for use.Can be agitating device, for example motor-driven blade or gear, blade or gear be embedded in the fine coal and rotate, thereby fine coal is stirred to avoid its caking.The fluidisation parts also can be blowning installations, for example the mouth of pipe of pipe is embedded in the fine coal and in this pipe and inflates, thereby the gas that the mouth of pipe blows out form bubble and rise and play the effect that fine coal is rolled in fine coal.No matter be which kind of fluidisation parts, fine coal is flowed, avoid static and caking.
Fig. 6 A is the schematic diagram according to the powder storehouse material loading process control of the embodiment of the invention.Fig. 6 B is the schematic diagram according to the intermediate bunker blanking process control of the embodiment of the invention.Can adopt programmable logic controller (PLC) PLC or other control devices, realize the storage powder in the embodiment of the invention for powder control according to the flow process shown in Fig. 6 A and Fig. 6 B.Below this control mode is described further again.The storage powder is to keep the weight of intermediate bunker 22 to be in the default scope for a purpose of powder control.Therefore, this control can be adopted following mode: at first obtain the weight of intermediate bunker 22, this weight can obtain from the weight signal that comes from weighing device 26 transmissions; Under the situation of this weight less than first preset value, control fine coal enters intermediate bunker 22 from big material bin 21 then; Under the situation of this weight greater than second preset value, control fine coal stops to enter intermediate bunker 22 from big material bin 21.Like this, the weight of intermediate bunker 22 just is controlled between above-mentioned first preset value and second preset value.
If storage powder powder feeder unit 20 is equipped with high charge level sensor 31 shown in Fig. 5 B and low level sensor 32, can also control the coal amount in the big material bin 21 so.Concrete mode can be, is controlled to be example with PLC, enters in the process of big material bin 21 at fine coal, when PLC receives the signal that high charge level sensor 31 sends, stops fine coal and enters big material bin 21; Enter in the process of intermediate bunker 22 at fine coal, when receiving the signal that low level sensor 32 sends, stop fine coal and enter big material bin 21.So just make fine coal piling heights in the big material bin 21 be between the installation site of the installation site of high charge level sensor 31 and low level sensor 32.
Can also comprise boiler combustion diagnosis unit control system in the control system of the pulverized-coal fired boiler of the embodiment of the invention.Boiler combustion diagnosis unit control system mainly comprises two basic functional blocks, boiler operating efficiency computing module and boiler operatiopn state analyzing module.At first need to import the Industrial Analysis data of coal dust, this unit can generate this coal flue gas enthalpy temperature table automatically, databases such as hot water under each temperature, the pressure, specific steam enthalpy database, each temperature unit weight ash enthalpy have been set up in inside, according to real-time boiler working condition data, can be in the line computation boiler efficiency.The boiler operatiopn state analyzing module, according to the efficiency calculation result, and All Alerts signal summation in the running, propose to optimize burning suggestion and accident analysis data.
Below the burning of the pulverized-coal fired boiler in embodiment of the invention control is illustrated.
Fig. 7 is the schematic diagram that transmits according to the signal in the method for controlling combustion of the pulverized-coal fired boiler of the embodiment of the invention.The burning control of the pulverized-coal fired boiler of the embodiment of the invention comprises pulverized coal friring control, combustion chamber draft control, The Water Level Control of Steam, excess air control etc., coal dust firing control divides igniting programme-control and downtime schedule programme-control two parts, decision condition possesses back starting ignition program, pulverized coal ignition divides the two-stage igniting, flame monitor is given secondary wind and a wind respectively after judging flame status, regulate each air quantity by each airduct flowmeter in conjunction with frequency converter or motor-driven valve co-ordination, after the dispensing coal dust is lighted, close igniting subsidiary engine equipment.Blowing out divides urgent blowing out of fault and normal blowing out dual mode, and its key is each equipment downtime order and time interval of control, to guarantee safe shutdown.Take corresponding measure according to different alert levels in the combustion process, serious situation enters the urgent blowing out control of fault.Important floor data of whole process and All Alerts data are all uploaded the control of boiler combustion diagnosis unit.Coal dust firing needs stable flow field and environment, whole burning should be under little condition of negative pressure to be carried out, because dust removing units is a sack cleaner, the whole system resistance there is periodic influence, here adopt pressure transmitter to survey furnace pressure in real time in conjunction with the air-introduced machine frequency converter, under PLC control, the utilization pid algorithm is stablized negative pressure control.The Water Level Control of Steam adopts the control of three momentums, prevents the false water level phenomenon, guarantees that steam water-level is truly stable.The coal theoretical air requirement that uses that is calculated by the boiler combustion diagnosis unit is to instruct to regulate the blow rate required, be in operation and utilize the coefficient of excess that records the calculating of tail flue gas oxygen content to pass through PLC, the utilization pid algorithm is regulated the blow rate required in real time, the burning of assurance high efficiency boiler, because the oxygen determination element has certain time-delay, therefore need field adjustable is carried out in the pid parameter setting.
Fig. 8 is the schematic diagram according to the method for controlling combustion key step of the pulverized-coal fired boiler of the embodiment of the invention.As shown in Figure 8, the method for controlling combustion of the pulverized-coal fired boiler of the embodiment of the invention mainly comprises the steps:
Step S80: obtain executing agency and sensor states.
Step S81: judge whether and to light a fire.Mainly be to judge each executing agency in this step, as motor, the state of electrically operated valve etc. whether normally, whether normally start and stop; And judge whether each sensor feedback signal is normal, promptly boiler possesses igniting blow-on condition, and for example, intermediate bunker has material etc.
Step S82: under the situation that ignition condition possesses with pulverized coal boiler ignition.
Step S83: flame detection intensity.Can adopt flame detecting device for example flame monitor detect and judge.Flame monitor is connected with control device, and this control device is used for carrying out burning control, can adopt for example programmable logic controller (PLC) PLC of existing various control device.
Step S84: reach in flame intensity under the situation of preset strength and supply with secondary wind to pulverized-coal fired boiler.In the present embodiment, be called secondary wind to the wind of coal powder boiler combustion oxygen supply; Dui Ying one more wind with it, a wind is mainly used in to pulverized-coal fired boiler supplies with fine coal, fine coal from the outlet valve of the device of supplying with fine coal flow out the back by a wind to burner hearth.In this step, the amount of the secondary wind of supply is less.
Step S85: to pulverized-coal fired boiler supply fine coal.In this step, adjust the size of fine coal supply.When improving for the powder motor speed, the supply of fine coal correspondingly increases.The fine coal that flows out, has promptly been realized to pulverized-coal fired boiler supply fine coal to burner hearth by a wind.
Step S86: increase secondary wind quantity delivered to pulverized-coal fired boiler.Increased the quantity delivered of pulverized-coal fired boiler secondary wind in this step, made boiler smooth combustion and efficient burning.
After above-mentioned steps S86, can detect the leaving water temperature or the steam pressure of pulverized-coal fired boiler, compare with setting value then, draw the boiler load adjusted value; Keep the air quantity of a current wind constant then, adjust the fine coal supply according to the boiler load adjusted value.This mode is only adjusted the boiler load adjusted value and is adjusted the fine coal supply, and control mode is easy to realize.Exerting oneself of boiler mainly is to realize by regulating the fine coal supply.
When pulverized-coal fired boiler moves, can detect the oxygen content of pulverized-coal fired boiler tail flue gas, under the situation of this oxygen content, increase the quantity delivered of secondary wind to pulverized-coal fired boiler less than first oxygen content setting value; Under the situation of this oxygen content, reduce the quantity delivered of secondary wind to pulverized-coal fired boiler greater than second oxygen content setting value.Be used for the secondary wind of oxygen supply by the oxygen content adjustment of detecting the pulverized-coal fired boiler tail flue gas, help to guarantee comparatively exactly the oxygen supply of burner hearth.
Because pulverized-coal fired boiler moves under the state of little negative pressure usually, so after burner hearth increases secondary wind, might be by the state of bad this little negative pressure, so can also detect the combustion chamber draft of pulverized-coal fired boiler, under the situation of combustion chamber draft, strengthen the air inducing amount of pulverized-coal fired boiler greater than first pressure set points; Under the situation of combustion chamber draft, reduce the air inducing amount of pulverized-coal fired boiler, thereby guarantee that burner hearth is in micro-vacuum state less than second pressure set points.
In order to realize above-mentioned relevant control, in the embodiment of the invention, gas flowmeter can be connected to control device, the flow of wind of gas flowmeter detection or secondary wind makes control device obtain the flow of current wind or secondary wind.
In embodiments of the present invention, temperature measuring equipment or pressure tester can be connected to control device, temperature measuring equipment is used to detect the leaving water temperature of pulverized-coal fired boiler, and pressure tester is used to detect the steam pressure of pulverized-coal fired boiler.Control device just can be according to the leaving water temperature of the pulverized-coal fired boiler that detects or the coal-supplying amount that steam pressure is controlled pulverized-coal fired boiler like this.
In embodiments of the present invention, the flue gas checkout gear can be connected to control device, this flue gas checkout gear is used to detect the oxygen content of pulverized-coal fired boiler tail flue gas.Control device just can be according to the blow rate required of detected boiler exhaust gas Control for Oxygen Content to burner hearth like this.
In embodiments of the present invention, the combustion chamber draft checkout gear can also be connected to control device, control device just can be according to the air inducing amount of detected combustion chamber draft value control from burner hearth like this.The combustion chamber draft checkout gear can be a pressure transmitter.
From above description as can be seen, in embodiments of the present invention, storage powder powder feeder unit has adopted big material bin and intermediate bunker two parts, and connect with flexible apparatus, utilize weighing device and control device that the weight of intermediate bunker is kept within the specific limits, thereby control is to the even feeding of coal powder fired boiler burner; Re-use flame detecting device, wind feeding mechanism and secondary wind feeding mechanism monitoring flame combustion state.Like this, the burning that has improved the coal-fired economy of pulverized-coal fired boiler and helped pulverized-coal fired boiler is stable more, efficient is higher.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the control system of a pulverized-coal fired boiler is characterized in that, comprises that water system unit control system, dust removing units control system, storage powder are for powder unit control system and coal powder boiler combustion unit control system, wherein:
Described water system unit control system supplies water to boiler water tank according to the boiler water tank liquid level control water softener that detects, and makes the boiler water tank water level remain on preset range;
Described dust removing units control system is according to pressure reduction control magnetic valve winding-up cloth bag before and after the sack cleaner that detects;
Described storage powder is connected with storage powder powder feeder unit for the powder unit control system, supplies fine coal according to the big material bin of the Weight control storage powder powder feeder unit of the intermediate bunker of the storage powder powder feeder unit that detects to described intermediate bunker;
The coal powder boiler combustion unit control system is regulated wind supply quantity and fine coal supply to pulverized-coal fired boiler according to the flame intensity of the pulverized-coal fired boiler that detects.
2. control system according to claim 1 is characterized in that, also comprises boiler combustion diagnosis unit control system, is used for:
Industrial Analysis data and pulverized-coal fired boiler floor data according to coal dust draw pulverized-coal fired boiler efficient and output;
Alarm signal according to described pulverized-coal fired boiler efficient and described pulverized-coal fired boiler draws information and accident analysis information and the output that is used to optimize burning.
3. control system according to claim 1 is characterized in that, described storage powder comprises first jockey, second jockey and weighing device for the powder unit control system, in first jockey and second jockey valve is installed, and:
Described big material bin is communicated with by first jockey with intermediate bunker, described intermediate bunker is communicated with the coal burner of described pulverized-coal fired boiler by second jockey, described intermediate bunker is connected with weighing device, described first jockey and second jockey are flexible apparatus, make described weighing device measure the weight and the transmission weight signal of intermediate bunker.
4. control system according to claim 1 is characterized in that, described storage powder also comprises high charge level sensor and the low level sensor that is installed in the described big material bin for the powder unit control system, and:
Described high charge level sensor is used for sending signal to described control device when the setting height(from bottom) of the height arrival high charge level sensor of the fine coal accumulation of big material bin;
Described low level sensor is used for sending signal to described control device when the setting height(from bottom) of the too late low level sensor of height of the fine coal accumulation of big material bin.
5. control system according to claim 1 is characterized in that, described storage powder also comprises the temperature detection part that is installed in the described big material bin for the powder unit control system, is used to detect the temperature in the described big material bin and send temperature signal.
6. control system according to claim 1, it is characterized in that, described storage powder also comprises the one or more fluidisation parts that are installed in the described big material bin for the powder unit control system, avoids caking thereby described fluidisation parts flow the interior fine coal of described big material bin.
7. control system according to claim 1 is characterized in that, described coal powder boiler combustion unit control system comprises gas flowmeter.
8. control system according to claim 1 is characterized in that, described coal powder boiler combustion unit control system comprises temperature measuring equipment or pressure tester, is respectively applied for the leaving water temperature or the steam pressure that detect pulverized-coal fired boiler.
9. control system according to claim 1 is characterized in that, described coal powder boiler combustion unit control system comprises the flue gas checkout gear, is used to detect the oxygen content of pulverized-coal fired boiler tail flue gas.
10. control system according to claim 1 is characterized in that, described coal powder boiler combustion unit control system comprises the combustion chamber draft checkout gear, is used to detect the combustion chamber draft of described pulverized-coal fired boiler.
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| CN103411234A (en) * | 2013-08-26 | 2013-11-27 | 罗泽云 | Quantitative air distribution economic combustion energy saving control system |
| CN106707952A (en) * | 2016-12-23 | 2017-05-24 | 西安航天动力机械厂 | Pulverized coal heat exchange self-diagnosis control method |
| CN108398901A (en) * | 2018-02-27 | 2018-08-14 | 常熟理工学院 | Intelligent heating furnace control system and its control method |
| CN109201712A (en) * | 2018-11-16 | 2019-01-15 | 绿水青山环保科技（大连）有限公司 | A kind of high-efficiency vertical domestic garbage disposer |
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| CN103411234B (en) * | 2013-08-26 | 2016-01-20 | 罗泽云 | A kind of quantitatively air distribution economical combustion energy-saving control system |
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