CN102080828A - System for automatically monitoring and controlling mechanical agitating fuel oil and water mixing device - Google Patents
System for automatically monitoring and controlling mechanical agitating fuel oil and water mixing device Download PDFInfo
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- CN102080828A CN102080828A CN 201110041670 CN201110041670A CN102080828A CN 102080828 A CN102080828 A CN 102080828A CN 201110041670 CN201110041670 CN 201110041670 CN 201110041670 A CN201110041670 A CN 201110041670A CN 102080828 A CN102080828 A CN 102080828A
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Abstract
The invention relates to a system for automatically monitoring and controlling a mechanical agitating fuel oil and water mixing device, comprising the steps of: adding clean water and fuel oil into a water mixing device respectively through a water metering pump and a fuel oil metering pump at the same time, and mechanically agitating the clean water and the fuel oil to generate water mixed fuel oil, putting the water mixed fuel oil into a water mixed fuel oil tank, delivering the water mixed fuel oil to boiler through a water mixed fuel oil delivery pump and burning the water mixed fuel oil in a boiler, wherein by utilizing a PLC (Programmable Logic Controller), combustion characteristic of the water mixed fuel oil can be optimized according to the characteristic of the fuel oil used on spot and the spot environment through changing the mixing ratio of the water and the fuel oil in the water mixed fuel oil and regulating the frequency of agitator motor frequency converter of a water mixing device; the supply quantity of the water mixed fuel oil delivered to the boiler can be regulated according to steam quality of the boiler; the water inlet quantity can be regulated according to a water flowmeter and the oil inlet quantity can be regulated according to a fuel oil flowmeter; and the generation quantity of the water mixed fuel oil can be regulated according to liquid level of the water mixed fuel oil tank. By utilizing the system, a real-time automatic control on the fuel oil and water mixing technical process can be realized and the mechanical agitating fuel oil and water mixing device can operate safely and reliably and can reach the standard in operation.
Description
Technical field
The present invention relates to automation field, relate in particular to the automatic monitoring and the control system of mechanical agitation type fuel water device.
Background technology
The fuel water technology is a power-saving technology, and content energy-efficient because of it, that reduce sulphur, nitrogen oxide and flue dust in pollution, the reduction flue gas is able to extensive use.
The know-why of mechanical agitation type fuel water device is: do not add emulsifying agent, adopt quantitative water mixing, special mechanical agitation to form the water mixing fuel oil, " microexplosion " effect takes place in burner internal spraying combustion process, reach the effect of fuel-economizing, reduction of discharging, synergy.
The core cell of mechanical agitation type fuel water device is a mechanical agitation core component emulsifier, regulate and accurate quick stirring technique by oil and discharge flow velocity, and the coupling by field working conditions such as fuel water device and oil circuit, water route and burners, be prepared into the water mixing fuel oil that in the spray burning process, can produce " microexplosion " effect.
The present problem that exists of mechanical agitation type fuel water: the water mixing ratio is uncontrollable, and globule granular size differs in the water mixing fuel oil, disperses inhomogeneously, is easy to layering, and automation degree of equipment is not high.In order to make in the water mixing fuel oil that mechanical agitation type fuel water device makes globule particle little, highly uniform and stable, operation maintenance is easy, and economical rationality is necessary automatic monitoring, the control system of fuel water process are optimized design.
Summary of the invention
For a kind of automatic monitoring, control system of mechanical agitation type fuel water device are provided, make its oil-saving effect good, can be for a long time, reliability service, the present invention has designed the automatic monitoring and the control system of mechanical agitation type fuel water device.
The mechanical agitation type fuel water apparatus main body that the present invention relates to is connected with the water route by three fast interfaces with oil circuit, be respectively water mixing fuel outlet, water inlet and fuel filler, oil return is transferred to oil return in the water mixing fuel oil fuel tank by the 4th fast interface when supplying fuel oil for oil burning boiler.With on the water route that water inlet links to each other the water measuring pump is set, and on the oil circuit that fuel filler links to each other the fuel metering pump is set; Adopt fuel metering pump and water measuring pump that fuel oil and the water that injects emulsifier is accurately measured respectively, determine that water/fuel oil proportioning is between 3-10%;
Fuel oil transmits through petroleum pipeline, injects the emulsifier fuel filler under the effect of fuel metering pump.Emulsifier is provided with three grades of stirring area, stir in emulsifier one-level district that the fuel filler place is provided with that a percent opening reaches 70%, each small aperture is less than 10 microns filter screen, fuel oil forms the fuel oil bundle of micron grain size through the filter screen effect, inject emulsifier one-level stirring area, oily Shu Sudu is controlled between the 0.5-1.0m/s.Water transmits through water-supply-pipe, injects mechanical agitation core component emulsifier water inlet under the effect of water measuring pump, enters emulsifier one-level stirring area.Cylindrical rotor to be clockwise rotating in the emulsifier one-level stirring area, because of gap between rotor and stator less than 5 microns, drive the current that enter and form thickness less than 5 microns water layer, and flow clockwise at its periphery, water velocity is about 50-100m/s.The water layer of the micron order thickness that flows and micron order fuel oil bundle normal impact fast fast under to impulse force, shearing force, frictional force and capillary effect, form the micron order globule in fuel oil.The water mixing fuel oil that begins to take shape under the drive of one-level stirring area rotor between one-level stirring area and secondary stirring area inlet enter the secondary stirring area, enter three grades of stirring area successively, form the water mixing fuel oil at last and discharge, after petroleum pipeline enters water mixing fuel oil fuel tank, store for future use from mechanical agitation core component emulsifier oil-out.Secondary stirs and three grades of stirrings are the gear stirring, its rotor surface is a gear, both are by gear interlock transmission, and interlock transmission part also plays stirring action because of the slit squeezing action, and secondary, three grades of stirrings are mainly played the globule and be dispersed in effect among the fuel oil.The rotation of mechanical agitation core component emulsifier relies on secondary and stirs the driven wheel is connected, it up stirring motor drive down and rotate counterclockwise, and drive secondary stirring rotation in the same way, and then drive three grades of stirrings and clockwise rotate.Simultaneously, driven wheel and one-level stir the mutual interlock of gear of top, drive it and clockwise rotate, and drive one-level and stir rotation in the same way.By above three grades of stirrings, form " oil-in-water " type water mixing fuel oil; In like manner, transposing fuel oil and water inlet, and appropriate change operational factor can obtain " Water-In-Oil " type water mixing fuel oil, and a machine is realized the production of two types of water mixing fuel oils.
The present invention is automatic monitoring and the control that is achieved through the following technical solutions said apparatus: its hardware system comprises PLC, PLC analog input module, PLC analog output module, water measuring pump, fuel metering pump, stirring motor, boiler mass dryness fraction tester and corresponding discharge meter, thermometer, liquid level gauge, magnetic valve, frequency converter.
Wherein, boiler mass dryness fraction tester is arranged on the Boiler Steam outlet, be used for detecting the steam quality that boiler is produced, water ga(u)ge is arranged on aqueduct and is used for measuring watering quantity, oil flowmeter is arranged on oil pipeline and is used for measuring the amount of fuel that enters mechanical agitation type fuel water device, liquid level gauge is arranged on water mixing fuel oil fuel tank and is used to refer to water mixing fuel oil fuel tank liquid level height, and thermometer is used for measuring water temperature and oil temperature.
Clear water is by the water measuring pump, and fuel oil is added in the emulsifier simultaneously by the fuel metering pump, drives emulsifier through stirring motor and stirs, and generates oil emulsion.After entering water mixing fuel oil fuel tank,, in boiler, burn through the water mixing transfer pump for fuel.
PLC is as the controller of system, and control program wherein comprises following content:
Adjust the program of water mixing fuel delivery according to boiler steam dryness to the quantity delivered of boiler;
According to employed fuel characteristic in scene and site environment, by mixed proportion that changes water and oil in the water mixing fuel oil and the frequency of adjusting fuel water device stirring motor frequency converter, the program of coming the combustion characteristics to the water mixing fuel oil to be optimized;
Adjust inflow according to water ga(u)ge, according to the program of oil flowmeter adjusting device inlet oil inlet quantity;
Adjust the program of the growing amount of water mixing fuel oil according to the liquid level of water mixing fuel oil fuel tank.
Effect of the present invention and benefit are, control technology, computer technology and actual field instrument and executing agency are combined, process characteristic at the mechanical agitation type fuel water, regulate and accurate quick stirring technique by oil and discharge flow velocity, and the coupling by field working conditions such as fuel water device and oil circuit, water route and burners, determine corresponding optimization service condition, develop automatic monitoring, the control system of novel fuel water mixing device, make it can prepare the water mixing fuel oil that can produce " microexplosion " effect.Make whole fuel water device safety, reliable, up to standard operation.Realized control automatically in real time to technical process.
Description of drawings
The present invention will be further described below in conjunction with accompanying drawing and concrete embodiment.
Fig. 1 is the theory diagram of system of the present invention;
Fig. 2 is the theory diagram of emulsifier inlet fuel flow control loop;
Fig. 3 is the theory diagram of emulsifier inlet clear water flow control loop;
Fig. 4 is the theory diagram of water mixing fuel oil oil tank liquid level control loop;
Fig. 5 is the theory diagram of boiler steam dryness control loop;
Fig. 6 is an electrical wiring schematic diagram of the present invention.
Among Fig. 1: 1, fuel tank, 2, water tank, 3, heater, 4, emulsifier, 5, boiler, 6, PLC, 7, magnetic valve, 8, oil flowmeter, 9, water ga(u)ge, 10, oil temperature ga(u)ge, 11, frequency converter, 12, the steam quality tester.
The specific embodiment
Specify the present invention below in conjunction with embodiment.
(1) fuel water device portal fuel metering pump, water measuring pump frequency control-loop
Control task:, make the water mixing fuel oil energy satisfy the boiler combustion requirement by regulating inlet fuel metering pump, water measuring pump frequency;
The control scheme: inlet fuel metering pump frequency control loop, referring to Fig. 2, water measuring pump frequency control-loop is referring to Fig. 3.Clear water is by the water measuring pump, and fuel oil is that oil transfer pump is added in the water mixing device simultaneously by the fuel metering pump, by regulating frequency converter frequency separately, makes water mixing fuel oil growing amount can satisfy the requirement of boiler combustion.The flow of clear water, inlet fuel oil is at first measured by system, be converted into the 4-20mA signal PLC analog input module of making a gift to someone, after PID (PID) calculates, the control signal of the 0-20mA that generates is sent into frequency converter separately through the PLC analog output module, realize the closed-loop control of water measuring pump, inlet fuel metering pump frequency, make water mixing fuel oil growing amount satisfy the requirement of boiler combustion.
(2) boiler steam dryness control loop
Control task: adjust water mixing transfer pump for fuel operating frequency, change the characteristic of water mixing fuel oil, make the supply of water mixing fuel oil can satisfy the requirement of boiler combustion, steam quality is met the requirements;
The control scheme: the boiler steam dryness control loop, referring to Fig. 5.System at first utilizes boiler mass dryness fraction tester to measure the mass dryness fraction of steam, be converted into the 4-20mA signal PLC analog input module of making a gift to someone, after PID (PID) calculates, the control signal of the 0-20mA that generates is sent into water mixing transfer pump for fuel frequency converter through the PLC analog output module, adjustment enters the water mixing fuel supply volume of boiler, realize the closed-loop control of boiler steam dryness, steam quality is met the demands.
(3) water mixing oil inflame characteristic optimizing
The combustion characteristics of water mixing fuel oil can change by the operating frequency of adjusting water mixing ratio and water mixing device emulsifier stirring motor.The operating frequency of stirring motor is high more, and globule particle is more little, stable more in the water mixing fuel oil; The water mixing ratio has determined the characteristic of water mixing fuel oil, if the water mixing ratio is too high, the combustion characteristics of water mixing fuel oil on the contrary can deterioration, does not have the purpose of fuel-economizing,, does not reach the effect of " microexplosion " equally if the water mixing ratio is too little, does not have the purpose that promotes burning.
The fuel characteristic that PLC uses according to the scene, and consider the factor of site environment, determine the profit mixed proportion of water mixing fuel oil, and the operating frequency of stirring motor.Combustion characteristics to the water mixing fuel oil is optimized.
(4) water mixing fuel oil oil tank liquid level control loop
Control task: whether the work by control water mixing transfer pump for fuel, regulates water mixing fuel oil oil tank liquid level.
The control scheme: water mixing fuel oil oil tank liquid level control loop, referring to Fig. 4, the liquid level of water mixing fuel oil fuel tank is mainly determined by water mixing fuel oil growing amount.Liquid level gauge is at first measured the height of liquid level, be converted into the 4-20mA signal PLC analog input module of making a gift to someone, after PID (PID) calculates, determine among the PLC new numerical value in the water mixing fuel oil growing amount register, thereby realize changing the purpose of water mixing fuel oil growing amount.When liquid level surpassed 1000mm, water mixing fuel oil growing amount reduced, and when liquid level was lower than 800mm, water mixing fuel oil growing amount increased.
Start and stop sequential control loop
The switch of intermediate fuel oil water mixing device start and stop control of the present invention and some main magnetic valves is to finish by PLC.Electrical wiring as shown in Figure 6.
The present invention combines control technology, computer technology and actual field instrument and executing agency, has realized the control in real time automatically to the fuel water technical process, makes the mechanical agitation type fuel water device can safe, reliable, up to standard operation.
The present invention is not limited to the foregoing description, and protection scope of the present invention is all classified in any equivalent concepts or change in the technical scope that the present invention discloses as.
Claims (1)
1. the automatic monitoring and the control system of a mechanical agitation type fuel water device, it is characterized in that: hardware system comprises PLC, PLC analog input module, PLC analog output module, water measuring pump, fuel metering pump, stirring motor, boiler mass dryness fraction tester and corresponding discharge meter, thermometer, liquid level gauge, magnetic valve, frequency converter; Wherein, boiler mass dryness fraction tester is arranged on the Boiler Steam outlet and is used for detecting the steam quality that boiler is produced, water ga(u)ge is arranged on aqueduct and is used for measuring watering quantity, oil flowmeter is arranged on oil pipeline and is used for measuring the amount of fuel that enters mechanical agitation type fuel water device, liquid level gauge is arranged on water mixing fuel oil fuel tank and is used to refer to water mixing fuel oil fuel tank liquid level height, and thermometer is used for measuring water temperature and oil temperature; PLC is as the controller of system, and its control program comprises according to boiler steam dryness adjusts the program of water mixing fuel delivery to the quantity delivered of boiler; According to employed fuel characteristic in scene and site environment, by mixed proportion that changes water and oil in the water mixing fuel oil and the frequency of adjusting fuel water device stirring motor frequency converter, the program of coming the combustion characteristics to the water mixing fuel oil to be optimized; Adjust inflow according to water ga(u)ge, according to the program of oil flowmeter adjusting device inlet oil inlet quantity; Adjust the program of the growing amount of water mixing fuel oil according to the liquid level of water mixing fuel oil fuel tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110041670 CN102080828A (en) | 2011-02-21 | 2011-02-21 | System for automatically monitoring and controlling mechanical agitating fuel oil and water mixing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110041670 CN102080828A (en) | 2011-02-21 | 2011-02-21 | System for automatically monitoring and controlling mechanical agitating fuel oil and water mixing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927583A (en) * | 2012-11-20 | 2013-02-13 | 大连海事大学 | Mechanical agitation type magnetized fuel water doping device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87204755U (en) * | 1987-11-10 | 1988-07-13 | 湖南省能源研究所 | Fuel oil water emulsifying mixer |
-
2011
- 2011-02-21 CN CN 201110041670 patent/CN102080828A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87204755U (en) * | 1987-11-10 | 1988-07-13 | 湖南省能源研究所 | Fuel oil water emulsifying mixer |
Non-Patent Citations (3)
| Title |
|---|
| 《机电工程》 20060731 郭江荣 基于PLC的柴油机重油动态乳化过程控制系统 49-51 第23卷, 第7期 * |
| 《机电工程》 20080531 刘大海等 基于PLC的柴油动态乳化装置设计及试验研究 21-23 第25卷, 第5期 * |
| 《湘潭矿业学院学报》 20011231 肖红飞等 乳化重油燃烧掺水量优化控制方案的分析与应用 44－47 第16卷, 第4期 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927583A (en) * | 2012-11-20 | 2013-02-13 | 大连海事大学 | Mechanical agitation type magnetized fuel water doping device |
| CN102927583B (en) * | 2012-11-20 | 2015-02-25 | 大连海事大学 | Mechanical agitation type magnetized fuel water doping device |
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Application publication date: 20110601 |