CN203112539U - Bus-based seawater desalination control system - Google Patents
Bus-based seawater desalination control system Download PDFInfo
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- CN203112539U CN203112539U CN2013201214969U CN201320121496U CN203112539U CN 203112539 U CN203112539 U CN 203112539U CN 2013201214969 U CN2013201214969 U CN 2013201214969U CN 201320121496 U CN201320121496 U CN 201320121496U CN 203112539 U CN203112539 U CN 203112539U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
The utility model discloses a bus-based seawater desalination control system. A system in the prior art is low in heat collection efficiency and water yield, and is completely in an automatic and extensive state, and the requirements of actual application cannot be met. The bus-based seawater desalination control system comprises a condensation heat collection part, a heat storage and exchange part, a seawater desalination part, an analog input module, a remote input/output (I/O) module, a PROFIBUS, a frequency converter, a programmable logic controller (PLC) and an upper computer. Flow transmitters, pressure transmitters, temperature transmitters and liquid level transmitters acquire signals, and input the signals into the analog input module which is connected with the remote I/O module. The remote I/O module is connected with the PLC through a bus, and the PLC is connected with the upper computer through RS485, and also controls the frequency converter through the bus and the remote I/O module. The bus-based seawater desalination control system is simple in structure, stable, convenient to maintain and low in cost, and has a good control effect, and a mature technology is adopted.
Description
Technical field
The utility model belongs to new forms of energy sea water desaltination field, is specifically related to a kind of Control System of Seawater Desalination based on bus.
Background technology
Along with the increase of world population and the people increase to energy degree of dependence, energy problem, Freshwater resources have become the great strategic issue in the world.For China, these two problems are particularly serious especially.Be subjected to the influence of rise in oil price and Global climate change in recent years, the renewable energy source development and use are subjected to the attention of international community day by day.In numerous renewable resourcess, it would be desirable sun power, to compare with other renewable resourcess, it has inexhaustible advantage.The Application Areas of sun power is very extensive, utilizes two aspects but finally can ascribe solar thermal utilization and light to.And for deficient day by day Freshwater resources, especially island, rural area etc. lack electric power, and the water-deficient area of coal resources addresses this problem extremely urgent especially.The appearance of solar energy sea water desalination apparatus and development just have been necessary very much.
The industrialization sea water desaltination mainly comprises reverse osmosis film method, multiple-effect distillation (or multistage flash evaporation method).Yet these traditional method for desalting seawater have a bottleneck problem, namely need to consume a large amount of fossil energies or electric power.Therefore, the development of new forms of energy sea water desaltination has in recent years obtained attention.
Existing desalination with Solar Energy branch: passive type and active.The passive type solar energy sea water desalinating plant refers to not have any dynamical element in those devices, also do not exist and utilize additional parts such as solar energy collector to carry out the initiatively solar energy sea water desalination apparatus of heating, the operation of device is passive finishing under the effect of sunlight fully.This class device simplicity of design, the convenience of drawing materials, and working cost is extremely low, but the water production rate of unit daylighting area is lower, thereby need bigger construction area.Be equipped with other power or Equipment for Heating Processing in the active solar energy sea water desalinating plant, use solar energy heat collection equipment, the system operating temperature of making increases substantially, the internal heat transfer process is improved, and the latent heat that in condensing process, discharges of recovered steam initiatively, its water production rate than passive type solar energy sea water desalinating plant is improved greatly, therefore be used widely.Yet all do not have the control of energy cycle in this two classes solar energy sea water desalination apparatus, the control of thermal cycling causes their heat collection efficient low, and producing water ratio is little, and system is spontaneous extensive state fully, can't satisfy the needs of practical application.
Better the solar seawater desalination mode should be in conjunction with solar energy light gathering and heat collecting and multiple-effect distillation (or multistage flash evaporation method).Solar energy light gathering and heat collecting can improve solar energy heating efficient, reduces thermosteresis, obtain high-quality thermal source.Multiple-effect distillation (or multistage flash evaporation method) can take full advantage of waste heat and obtain higher product water ratio.So advanced solar desalination process is necessary to adopt control techniques, and energy cycle and water cycle process are optimized configuration, improve energy utilization efficiency, obtain bigger water-yielding capacity.But the common more complicated of such system belongs to typical industrial process control system.
Summary of the invention
The utility model falls behind at original desalination with Solar Energy, and solar energy acquisition and sea water desaltination inefficiency can not adapt to deficiencies such as extensive sea water desaltination demand, have proposed a kind of Control System of Seawater Desalination based on bus.
A kind of Control System of Seawater Desalination based on bus of the utility model comprises light and heat collection part, heat storage and exchange part and sea water desaltination part, analog quantity load module, remote I/O module, PROFIBUS bus, frequency transformer, PLC, upper computer.
Described light and heat collection partly comprises first flow transmitter, first temperature transmitter, valve tube, heat accumulator, the 4th pump and the 7th pipeline;
One end of described the 7th pipeline is connected with first oil outlet of heat accumulation oil tank, and the other end is connected with an end of valve tube, and the 7th pipeline is provided with the 4th pump; The other end of valve tube is connected with an end of the 6th pipeline, and the other end of the 6th pipeline is connected with first oil-in of heat accumulation oil tank; The 6th pipeline is provided with first temperature transmitter and first flow transmitter; Described valve tube is arranged in the heat accumulator;
Described heat storage and exchange partly comprises the 3rd temperature transmitter, first pressure unit, the 3rd pipeline, hot-water cylinder, second pump, the 4th pipeline, the 4th temperature transmitter, second fluid level transmitter, interchanger, the 5th pipeline, second flow transmitter, the 3rd pump, the 6th pipeline, second temperature transmitter, first fluid level transmitter, heat accumulation oil tank, the 3rd temperature transmitter and the 8th pipeline;
Arrange first fluid level transmitter and second temperature transmitter on the described heat accumulation oil tank, an end of the 5th pipeline is connected with heat accumulation oil tank second oil outlet, and the other end is connected with interchanger first oil-in; The 5th pipeline is provided with the 3rd pump and second flow transmitter, and an end of the 8th pipeline is connected with first oil outlet of interchanger, and the other end is connected with the heat accumulation oil tank second import mouth, and the 8th pipeline is provided with the 3rd temperature transmitter; One end of the 4th pipeline is connected with first water outlet of interchanger, and the other end is connected with hot-water cylinder first water-in; One end of the 3rd pipeline is connected with hot-water cylinder first water outlet, and the other end is connected with first water-in of interchanger; The 3rd pipeline is provided with pump and the 3rd temperature transmitter; Hot-water cylinder is provided with second fluid level transmitter, the 4th temperature transmitter and first pressure unit.
Described sea water desaltination partly comprises first pump, the 5th flow transmitter, first pipeline, the 8th temperature transmitter, sea water desalinating plant, second pipeline, the 4th flow transmitter, the 5th temperature transmitter, the 5th pump, the 9th pipeline, the tenth pipeline, the 6th temperature transmitter, the 7th temperature transmitter and the 6th flow transmitter; One end of second pipeline is connected with second water outlet of interchanger, and the other end is connected with the opening for feed of sea water desalinating plant, and second pipeline is provided with the 5th pump, the 4th flow transmitter and the 5th temperature transmitter; First pipeline, one end is connected with sea water desalinating plant waste water mouth, arranges the 8th temperature transmitter at first pipeline; The 9th pipeline passes sea water desalinating plant, and the one end is connected with second water-in of interchanger, and the other end extracts the charging seawater by first pump, and the 9th pipeline is provided with the 5th flow transmitter and the 6th temperature transmitter; The tenth pipeline one end is connected with the water outlet of sea water desalinating plant, and the tenth pipeline is provided with the 7th temperature transmitter and the 6th flow transmitter.
Described first, second, third and fourth, all be provided with frequency transformer on five pumps.
Flow transmitter, pressure unit, temperature transmitter and fluid level transmitter acquired signal, and signal is input in the analog quantity load module, the analog quantity load module adopts the PROFIBUS bus protocol to transfer to PLC by the remote I/O module simulating signal that receives, PLC links to each other with upper computer by RS485, and PLC sends the signal of PROFIBUS agreement and controls frequency transformer by the remote I/O module.
The beneficial effects of the utility model are:
1) adopts advanced Field Bus Control Technology that each subsystem of solar seawater desalination is coordinated control, improved the present situation that existing solar seawater desalination system lacks the control function, be conducive to energy utilization efficiency and the raising of producing fresh water efficient;
2) Field Bus Control Technology can be carried out centralized Control to a plurality of sea water desaltinations unit, is applicable to big-and-middle-sized sea water desaltination scale, also meets the solar energy distribution and does not concentrate the characteristics that cause the sea water desaltination unit not concentrated;
3) Field Bus Control Technology has adopted the design of multiple spot circulating sampling, thereby has reduced the use of AI module, makes Circuits System obtain simplifying;
4) scenario-frame of the present utility model is simplified, and system stability is easy to maintenance, technology maturation, control respond well and with low cost, can Real-time and Dynamic Detection and control total system.
Description of drawings
Fig. 1 is solar energy heating sea water desaltination cell schematics;
Fig. 2 is the Controlling System structural representation.
Embodiment
The utility model is described in further detail below in conjunction with Figure of description.
As shown in Figure 1, a kind of Control System of Seawater Desalination based on bus of the utility model comprises light and heat collection part, heat storage and exchange part and sea water desaltination part, analog quantity load module (AI module), remote I/O module (ET200), PROFIBUS bus, frequency transformer, PLC, upper computer.
Light and heat collection partly comprises first flow transmitter 23, first temperature transmitter 24, valve tube 25, heat accumulator 26, the 4th pump 27 and the 7th pipeline 28;
One end of described the 7th pipeline 28 is connected with first oil outlet of heat accumulation oil tank 30, and the other end is connected with an end of valve tube 25, and the 7th pipeline 28 is provided with the 4th pump 27; The other end of valve tube 25 is connected with an end of the 6th pipeline 21, and the other end of the 6th pipeline 21 is connected with first oil-in of heat accumulation oil tank 30; The 6th pipeline 21 is provided with first temperature transmitter 24 and first flow transmitter 23; Described valve tube 25 is arranged in the heat accumulator 26;
Heat storage and exchange partly comprises the 3rd temperature transmitter 9, first pressure unit 10, the 3rd pipeline 11, hot-water cylinder 12, second pump 13, the 4th pipeline 14, the 4th temperature transmitter 15, second fluid level transmitter 16, interchanger 17, the 5th pipeline 18, second flow transmitter 19, the 3rd pump 20, the 6th pipeline 21, second temperature transmitter 22, first fluid level transmitter 29, heat accumulation oil tank 30, the 3rd temperature transmitter 31 and the 8th pipeline 32;
An end of arranging first fluid level transmitter 29 and second temperature transmitter, 22, the five pipelines 18 on the described heat accumulation oil tank 30 is connected with heat accumulation oil tank 30 second oil outlets, and the other end is connected with interchanger 17 first oil-ins; The 5th pipeline 18 is provided with the 3rd pump 20 and second flow transmitter 19, one end of the 8th pipeline 32 is connected with first oil outlet of interchanger 17, the other end is connected with heat accumulation oil tank 30 second import mouths, and the 8th pipeline 32 is provided with the 3rd temperature transmitter 31; One end of the 4th pipeline 14 is connected with first water outlet of interchanger 17, and the other end is connected with hot-water cylinder 12 first water-ins; One end of the 3rd pipeline 11 is connected with hot-water cylinder 12 first water outlets, and the other end is connected with first water-in of interchanger 17; The 3rd pipeline 11 is provided with pump 13 and the 3rd temperature transmitter 9; Hot-water cylinder 12 is provided with second fluid level transmitter 16, the 4th temperature transmitter 15 and first pressure unit 10.
Sea water desaltination partly comprises first pump 1, the 5th flow transmitter 2, first pipeline 3, the 8th temperature transmitter 4, sea water desalinating plant 5, second pipeline 6, the 4th flow transmitter 7, the 5th temperature transmitter 8, the 5th pump 33, the 9th pipeline 34, the tenth pipeline 35, the 6th temperature transmitter 36, the 7th temperature transmitter 37 and the 6th flow transmitter 38; One end of second pipeline 6 is connected with second water outlet of interchanger 17, and the other end is connected with the opening for feed of sea water desalinating plant 5, and second pipeline 6 is provided with the 5th pump 33, the 4th flow transmitter 7 and the 5th temperature transmitter 8; First pipeline, 3 one ends are connected with sea water desalinating plant 5 waste water mouths, arrange the 8th temperature transmitter 4 at first pipeline 3; The 9th pipeline 34 passes sea water desalinating plant 5, and the one end is connected with second water-in of interchanger 17, and the other end extracts the charging seawater by first pump, and the 9th pipeline 34 is provided with the 5th flow transmitter 2 and the 6th temperature transmitter 36; The tenth pipeline 35 1 ends are connected with the water outlet of sea water desalinating plant 5, and the tenth pipeline 35 is provided with the 7th temperature transmitter 37 and the 6th flow transmitter 38.
Described first, second, third and fourth, all be provided with frequency transformer on five pumps.
Assemble solar heat energy with groove type solar tracking heat collection equipment, thermal oil in the heating, vacuum pipe, then, thermal oil is under the driving of variable-frequency control pump, and high temperature oil is injected storage tank, reaches the purpose that improves heat storage can oil temperature.Then, the high temperature heat conductive oil interchanger (1 grade of heat exchange structure or 2 grades of heat exchange structures) of flowing through adds hot sea water in the heat storage can; Seawater after the heating enters sea water desalting equipment, and output fresh water is also got rid of strong brine.Arrange a plurality of sensors or transmitter in this covering device, gather temperature, flow, the viscosity of thermal oil, oil temperature, liquid level in the heat storage can, pressure, liquid level, import hot oil temperature and outlet seawater temperature in the interchanger, signals such as sea water desalting equipment outlet fresh water temperature, discharge strong brine temperature.Also be furnished with the motor of a plurality of Frequency Converter Control simultaneously, drive impeller pump work, control thermal-arrest thermal oil flow, heat exchange heat conduction stream flow enters heat-exchange equipment seawater flow etc.
As shown in Figure 2, flow transmitter, pressure unit, temperature transmitter and fluid level transmitter acquired signal, and signal is input in the analog quantity load module, the analog quantity load module links to each other with remote I/O module ET200.Remote I/O module ET200 links to each other with PLC by PROFIBUS, and PLC links to each other with upper computer by RS485, and PLC controls frequency transformer through PROFIBUS by the remote I/O module simultaneously.
Sensors such as flow transmitter, pressure unit, temperature transmitter and fluid level transmitter are as the analog signals collector, according to the actual requirements, quantity can have a plurality of, these transmitters are input to signals such as detected temperature, pressure, flow, liquid level and flow in the AI module, here the equal corresponding unique address of each transmitter adopts the mode of multiple spot circulating samplings to carry out signals collecting to a plurality of sensors.These signals comprise out temperature, the viscosity of thermal oil in the solar energy heating part, the pressure of interchanger in the heat exchanging part, outlet water temperature, the out temperature of sea water desaltination part seawater, the temperature out of fresh water and strong brine etc.These simulating signals are input among the remote I/O module ET200 after handling through the analog quantity load module, and ET200 imports signal among the PLC into by fieldbus PROFIBUS, the influence that so just can avoid the decay of signal long-distance transmissions and be interfered.PLC links to each other with upper computer by RS485, sets initial value and import among the PLC in host computer monitoring software WinCC.PLC accepts the next signal of PROFIBUS bus transfer as actual acceptance value, compares with the initial value that transmits in the upper computer, difference is handled the back output in the remote I/O module by the PROFIBUS bus, controls the operation of frequency transformer, regulates fluctuations in discharge.Wherein PLC all is transferred to actual reception value, initial set value, difference in the upper computer by RS485, shows in monitoring software WinCC, realizes the dynamic monitoring to total system.In PLC, realize PID control and smith predictive compensation, so can be so that this feedback control is timely and effective.
Claims (1)
1. the Control System of Seawater Desalination based on bus comprises light and heat collection part, heat storage and exchange part and sea water desaltination part, and analog quantity load module, remote I/O module, PROFIBUS bus, frequency transformer, PLC, upper computer is characterized in that:
Described light and heat collection partly comprises first flow transmitter, first temperature transmitter, valve tube, heat accumulator, the 4th pump and the 7th pipeline;
One end of described the 7th pipeline is connected with first oil outlet of heat accumulation oil tank, and the other end is connected with an end of valve tube, and the 7th pipeline is provided with the 4th pump; The other end of valve tube is connected with an end of the 6th pipeline, and the other end of the 6th pipeline is connected with first oil-in of heat accumulation oil tank; The 6th pipeline is provided with first temperature transmitter and first flow transmitter; Described valve tube is arranged in the heat accumulator;
Described heat storage and exchange partly comprises the 3rd temperature transmitter, first pressure unit, the 3rd pipeline, hot-water cylinder, second pump, the 4th pipeline, the 4th temperature transmitter, second fluid level transmitter, interchanger, the 5th pipeline, second flow transmitter, the 3rd pump, the 6th pipeline, second temperature transmitter, first fluid level transmitter, heat accumulation oil tank, the 3rd temperature transmitter and the 8th pipeline;
Arrange first fluid level transmitter and second temperature transmitter on the described heat accumulation oil tank, an end of the 5th pipeline is connected with heat accumulation oil tank second oil outlet, and the other end is connected with interchanger first oil-in; The 5th pipeline is provided with the 3rd pump and second flow transmitter, and an end of the 8th pipeline is connected with first oil outlet of interchanger, and the other end is connected with the heat accumulation oil tank second import mouth, and the 8th pipeline is provided with the 3rd temperature transmitter; One end of the 4th pipeline is connected with first water outlet of interchanger, and the other end is connected with hot-water cylinder first water-in; One end of the 3rd pipeline is connected with hot-water cylinder first water outlet, and the other end is connected with first water-in of interchanger; The 3rd pipeline is provided with pump and the 3rd temperature transmitter; Hot-water cylinder is provided with second fluid level transmitter, the 4th temperature transmitter and first pressure unit;
Described sea water desaltination partly comprises first pump, the 5th flow transmitter, first pipeline, the 8th temperature transmitter, sea water desalinating plant, second pipeline, the 4th flow transmitter, the 5th temperature transmitter, the 5th pump, the 9th pipeline, the tenth pipeline, the 6th temperature transmitter, the 7th temperature transmitter and the 6th flow transmitter; One end of second pipeline is connected with second water outlet of interchanger, and the other end is connected with the opening for feed of sea water desalinating plant, and second pipeline is provided with the 5th pump, the 4th flow transmitter and the 5th temperature transmitter; First pipeline, one end is connected with sea water desalinating plant waste water mouth, arranges the 8th temperature transmitter at first pipeline; The 9th pipeline passes sea water desalinating plant, and the one end is connected with second water-in of interchanger, and the other end extracts the charging seawater by first pump, and the 9th pipeline is provided with the 5th flow transmitter and the 6th temperature transmitter; The tenth pipeline one end is connected with the water outlet of sea water desalinating plant, and the tenth pipeline is provided with the 7th temperature transmitter and the 6th flow transmitter;
Described first, second, third and fourth, all be provided with frequency transformer on five pumps;
Flow transmitter, pressure unit, temperature transmitter and fluid level transmitter acquired signal, and signal is input in the analog quantity load module, the analog quantity load module adopts the PROFIBUS bus protocol to transfer to PLC by the remote I/O module simulating signal that receives, PLC links to each other with upper computer by RS485, and PLC sends the signal of PROFIBUS agreement and controls frequency transformer by the remote I/O module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013201214969U CN203112539U (en) | 2013-03-15 | 2013-03-15 | Bus-based seawater desalination control system |
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| CN2013201214969U CN203112539U (en) | 2013-03-15 | 2013-03-15 | Bus-based seawater desalination control system |
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| CN203112539U true CN203112539U (en) | 2013-08-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103130292A (en) * | 2013-03-15 | 2013-06-05 | 杭州电子科技大学 | Bus-based seawater desalination control system |
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2013
- 2013-03-15 CN CN2013201214969U patent/CN203112539U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103130292A (en) * | 2013-03-15 | 2013-06-05 | 杭州电子科技大学 | Bus-based seawater desalination control system |
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Granted publication date: 20130807 |