CN108897348A - A kind of ORC electricity generation system working medium tank automatic Control Systems of Liquids Height - Google Patents
A kind of ORC electricity generation system working medium tank automatic Control Systems of Liquids Height Download PDFInfo
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- CN108897348A CN108897348A CN201811117035.8A CN201811117035A CN108897348A CN 108897348 A CN108897348 A CN 108897348A CN 201811117035 A CN201811117035 A CN 201811117035A CN 108897348 A CN108897348 A CN 108897348A
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- working medium
- liquid level
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
A kind of ORC electricity generation system working medium tank automatic Control Systems of Liquids Height, the present invention relates to organic Rankine cycle power generation systems, in order to solve the problems, such as that existing working medium tank manual control liquid level efficiency is lower.Pressure sensor II and liquid level sensor II in the working medium tank automatic Control Systems of Liquids Height are mounted on working medium sealant supplement cylinder, pressure sensor I and liquid level sensor I are mounted on working medium tank, working medium sealant supplement cylinder is connected by connecting tube with working medium tank, working medium fluid infusion pump and electric check valve are provided in connecting tube, the signal input part of liquid level sensor, pressure sensor and working medium concentration detector and controller is connected by hardwire, and the signal output end of controller is connect with working medium fluid infusion pump, electric check valve, electricity generation system working medium pump by hardwire.The present invention detects the variation of working medium tank liquid level by liquid level sensor, is carried out automatically controlling using controller, and the filling and recycling of working medium are realized by working medium fluid infusion pump and electric check valve.
Description
Technical field
The present invention relates to Organic Rankine Cycle (abbreviation ORC) electricity generation systems, and in particular to a kind of ORC electricity generation system working medium tank
Automatic Control Systems of Liquids Height.
Background technique
As domestic emerging thermoelectric generation technology, Organic Rankine Cycle (abbreviation ORC) electricity generation system can be applied to a variety of necks
The low temperature heat energy in domain recycles, and operating pressure is low, space occupied is small, the safety with good mobility and height, and
And system operation is efficient, environmental protection, becomes the hot spot of domestic waste heat recycling field research.
In ORC electricity generation system, the liquid level of working medium tank is extremely important, and working medium liquid storage amount not only will affect system effectiveness, together
When have an effect on the safe operation of working medium pump in electricity generation system, too low liquid level will lead to system effectiveness reduction, it is also possible to cause work
The generation of matter pump cavitation, and excessive working medium liquid storage amount will increase leak rate, cause environmental pollution even safety problem；It is practical
Use process in, since working medium pump, expanding machine and other junctions can not accomplish to be absolutely sealed in system, long-play must
So there is working medium tank liquid level decline caused by leaking；In addition, working medium tank liquid level also can be in the short time in system variable parameter operation
It is interior to change with load variations；So being of great significance to the control of working medium tank liquid level.
Staff usually relied on for the control of working medium tank liquid level at present observe liquid level and manually control filling, this method without
Method real-time control liquid level under the conditions of variable working condition, and in system operation with pressure, there are security risks for progress manual operation.Hair
Bright patent CN 201710333493.4 discloses a kind of adjustable organic rankine cycle system of working medium charging amount dynamic, the working medium
It is mounted with the water packet of variable volume in storage tank, realizes being filled with or put in real time for working medium by adjusting water packet stereomutation pipeline section pressure
Out, but the method Shortcomings, the water packet needs of variable volume stretch repeatedly for a long time in organic working medium and water, the use of water packet
Service life and leakproofness it is difficult to ensure that, once leakage will lead to system organic working medium purity reduction, reduce system effectiveness, or even exist
Security risk.Patent of invention CN 201720535247.2 discloses a kind of working medium replenishment system, realizes work using pressurization by nitrogen gas
The automatic ration of matter supplements, but the method can not recycle working medium, if liquid level occurred under the short time in system variable parameter operation
The case where rising after drop will lead to working medium interference in system, increase system pressure and leak rate, or even exist safe hidden
Suffer from.
Summary of the invention
The purpose of the present invention is to solve existing working medium tank manual control liquid level efficiency is lower, and it is difficult to double-direction control
The problem of, and a kind of ORC electricity generation system working medium tank automatic Control Systems of Liquids Height is provided.
ORC electricity generation system working medium tank automatic Control Systems of Liquids Height of the present invention includes working medium tank, working medium sealant supplement cylinder, level sensing
Device I, liquid level sensor II, pressure sensor I, pressure sensor II, working medium fluid infusion pump, electric check valve, controller and working medium
Concentration detector, pressure sensor II and liquid level sensor II are mounted on working medium sealant supplement cylinder, pressure sensor I and level sensing
Device I is mounted on working medium tank, and the top of working medium tank is provided with working medium entrances, and the bottom of working medium tank is provided with working medium efferent duct, working medium
Electricity generation system working medium pump is provided in efferent duct, one end of connecting tube is connected with the bottom of working medium sealant supplement cylinder, connecting tube it is another
One end is connected with the bottom of working medium tank, and working medium fluid infusion pump and electric check valve are provided in connecting tube, and the working medium is mended
Liquid pump is two-way working medium pump；
Liquid level sensor I, liquid level sensor II, pressure sensor I, pressure sensor II and working medium concentration detector difference
It is connect with the signal input part (passing through hardwire) of controller, the signal output end of controller pumps with working medium fluid infusion respectively, is electronic
Shut-off valve, electricity generation system working medium pump (passing through hardwire) connection.
The present invention detects the variation of working medium tank liquid level by liquid level sensor I, is pumped using controller to working medium fluid infusion and electronic
Shut-off valve is controlled, and when working medium tank liquid level is too low, electric check valve is opened, and working medium is mended in the positive operation of working medium fluid infusion pump
Working medium injects working medium tank in flow container；When working medium tank liquid level is excessively high, electric check valve is opened, and working medium fluid infusion pumps inverted running, will
Working medium is recycled to working medium sealant supplement cylinder in working medium tank.When working medium tank liquid level is in controller range of set value, electric check valve is closed
It closes, working medium fluid infusion pump is out of service, maintains working medium tank liquid level in range of set value.In addition, working medium sealant supplement cylinder is equipped with working medium
Fluid infusion entrance, when working medium sealant supplement cylinder liquid level is too low or working medium fluid infusion pressure tank is lower than working medium tank, working medium is mended in controller prompt
Flow container carries out working medium fluid infusion.Working medium concentration in environment is detected by working medium concentration detector, is set when working medium concentration is higher than
When definite value, controller issues stopping signal to electricity generation system working medium pump and working medium fluid infusion pump, issues to electric check valve and closes valve letter
Number；When working medium tank or working medium fluid infusion pressure tank are more than setting value, safety valve automatic valve opening pressure release guarantees system safety.
ORC electricity generation system working medium tank automatic Control Systems of Liquids Height of the present invention includes following beneficial effect：
1, the present invention detects the variation of working medium tank liquid level by liquid level sensor, is pumped using controller to working medium fluid infusion and electronic
Shut-off valve carries out automatically controlling, and saves manpower, guarantees system long-play level stability；
2, the present invention is pumped by working medium fluid infusion and electric check valve realizes the filling and recycling of working medium, and double-direction control liquid level becomes
Change, preventing leak rate caused by high liquid level from increasing problem and crossing systematic working medium pump cavitation caused by low liquid level and efficiency reduces
The problems such as；
3, the present invention detects environment working medium concentration by working medium concentration detector, safety caused by preventing working medium from largely leaking
Accident prevents superpressure by safe valve protection system, makes it using safer and more reliable；
4, present invention sealing is convenient, can directly replace original working medium tank under the conditions of ORC electricity generation system existing equipment,
It installs automatic Control Systems of Liquids Height additional, new-built unit can be not only configured, the system built up can also be added
Dress transformation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of ORC electricity generation system working medium tank automatic Control Systems of Liquids Height of the present invention.
Specific embodiment
Specific embodiment one：Present embodiment ORC electricity generation system working medium tank automatic Control Systems of Liquids Height includes working medium tank
9, working medium sealant supplement cylinder 3, liquid level sensor I8, liquid level sensor II5, pressure sensor I10, pressure sensor II4, working medium fluid infusion
Pump 15, electric check valve 16, controller 6 and working medium concentration detector 7, pressure sensor II4 and liquid level sensor II5 are mounted on
On working medium sealant supplement cylinder 3, pressure sensor I10 and liquid level sensor I8 are mounted on working medium tank 9, and the top of working medium tank 9 is provided with work
Matter entrance 12, the bottom of working medium tank 9 are provided with working medium efferent duct 13, electricity generation system working medium pump are provided in working medium efferent duct 13
14, one end of connecting tube is connected with the bottom of working medium sealant supplement cylinder 3, and the other end of connecting tube is connected with the bottom of working medium tank 9,
Working medium fluid infusion pump 15 and electric check valve 16 are provided in connecting tube, the working medium fluid infusion pump 15 is two-way working medium pump；
Liquid level sensor I8, liquid level sensor II5, pressure sensor I10, pressure sensor II4 and working medium Concentration Testing
Instrument 7 is connect with the signal input part of controller 6 (passing through hardwire) respectively, and the signal output end of controller 6 is mended with working medium respectively
Liquid pump 15, electric check valve 16, electricity generation system working medium pump 14 (passing through hardwire) connection.
Present embodiment utilizes controller tune by monitoring working medium tank liquid level, working medium concentration and pressure inside the tank in the environment
Working medium fluid infusion pump, electric check valve and electricity generation system working medium pump are saved, working medium tank liquid level is automatically controlled in real time, so that liquid level
Control security risk and the system effectiveness reduction etc. of liquid level too high or too low generation when avoiding variable parameter operation in the normal range
Problem, while realizing to working medium tank automatic liquid supply, guarantee that system long-play working medium is sufficient, automatically control and save manpower,
It is safer and more reliable.
Specific embodiment two：The present embodiment is different from the first embodiment in that on the top of working medium sealant supplement cylinder 3
It is provided with safety valve II2.
Specific embodiment three：The present embodiment is different from the first and the second embodiment in that on the top of working medium tank 9
It is provided with safety valve I 11.
Specific embodiment four：Working medium sealant supplement cylinder 3 unlike one of present embodiment and specific embodiment one to three
Lower part be provided with working medium fluid infusion entrance 1.
Specific embodiment five：The type of controller 6 unlike one of present embodiment and specific embodiment one to four
Number be SIMATIC S7-200PLC.
Specific embodiment six：Working medium Concentration Testing unlike one of present embodiment and specific embodiment one to five
Instrument 7 is arranged within the scope of the 1m of working medium tank 9.
Embodiment：The present embodiment ORC electricity generation system working medium tank automatic Control Systems of Liquids Height includes working medium tank 9, working medium fluid infusion
Tank 3, liquid level sensor I8, liquid level sensor II5, pressure sensor I10, pressure sensor II4, working medium fluid infusion pump 15, it is electronic
Shut-off valve 16, controller 6 and working medium concentration detector 7, pressure sensor II4 and liquid level sensor II5 are mounted on working medium fluid infusion
On tank 3, pressure sensor I10 and liquid level sensor I8 are mounted on working medium tank 9, and the top of working medium tank 9 is provided with working medium entrances 12,
The bottom of working medium tank 9 is provided with working medium efferent duct 13, and electricity generation system working medium pump 14 is provided in working medium efferent duct 13, connecting tube
One end is connected with the bottom of working medium sealant supplement cylinder 3, and the other end of connecting tube is connected with the bottom of working medium tank 9, in connecting tube
It is provided with working medium fluid infusion pump 15 and electric check valve 16, the working medium fluid infusion pump 15 is two-way working medium pump；
Liquid level sensor I8, liquid level sensor II5, pressure sensor I10, pressure sensor II4 and working medium Concentration Testing
Instrument 7 is connect with the signal input part of controller 6 by hardwire respectively, and the 1m model of working medium tank 9 is arranged in working medium concentration detector 7
In enclosing, the signal output end of controller 6 passes through with working medium fluid infusion pump 15, electric check valve 16, electricity generation system working medium pump 14 respectively
Hardwire connection.
Working medium concentration detector is GD7500 type refrigerant environment detector, controller model SIMATIC in the present embodiment
S7-200PLC, is provided with safety valve II2 on the top of working medium sealant supplement cylinder 3, and the top of working medium tank 9 is provided with safety valve I 11.
The present embodiment working medium tank is equipped with branch holder, and the pressure sensor I is arranged on the angle valve of branch holder connection, leads to
The switch of angle valve, connection or shielding system and pressure sensor are crossed, guarantees the airtightness of organic working medium pipeline simultaneously to working medium pressure
Power measures.Working medium sealant supplement cylinder is equipped with branch holder, and the pressure sensor II is arranged on the angle valve of branch holder connection, leads to
The switch of angle valve, connection or shielding system and pressure sensor are crossed, guarantees the airtightness of organic working medium pipeline simultaneously to working medium pressure
Power measures.
The application method of working medium tank automatic Control Systems of Liquids Height is as follows in the present embodiment ORC electricity generation system：
One, controller is set, setting value I is to cross low value, setting value II according to the liquid level that working medium tank volume is set
Liquid level to be set according to working medium tank volume crosses high level, and setting value III is environment working medium excessive concentration value, and setting value IV is fluid infusion
Setting；
Two, working medium tank liquid level is monitored by liquid level sensor I, leve signal is transferred to by control by hardwire
Device processed, when liquid level is less than or equal to setting value I, controller issues valve opening signal to electric check valve by hardwire, electronic
Shut-off valve is opened, and controller, which pumps working medium fluid infusion, issues positive enabling signal, and working medium fluid infusion pump adds working medium in working medium sealant supplement cylinder
Pressure injection enters working medium tank；
Three, working medium tank liquid level is monitored by liquid level sensor I, leve signal is transferred to by control by hardwire
Device processed, when liquid level is greater than the set value I, and is less than setting value II, controller issues electric check valve by hardwire and closes valve
Signal, electric check valve are closed, and controller, which pumps working medium fluid infusion, issues stopping signal, and working medium fluid infusion pump stops working；
Four, working medium tank liquid level is monitored by liquid level sensor I, leve signal is transferred to by control by hardwire
Device processed, when liquid level is greater than or equal to setting value II, controller issues valve opening signal to electric check valve by hardwire, electronic
Shut-off valve is opened, and controller, which pumps working medium fluid infusion, issues reverse starting signal, and working medium fluid infusion is pumped working medium pressurization note in working medium tank
Enter working medium sealant supplement cylinder；
Five, working medium concentration in environment is detected by working medium concentration detector, by hardwire by concentration electric signal
It is transferred to controller, when concentration value is higher than setting value III, controller prompts leakage rate excessive, and to electricity generation system working medium pump
It is pumped with working medium fluid infusion and issues stopping signal, electric check valve is issued and closes valve signal；
Six, working medium sealant supplement cylinder liquid level is monitored by liquid level sensor II, is passed leve signal by hardwire
Defeated to arrive controller, when liquid level is lower than setting value IV, controller prompt carries out work to working medium sealant supplement cylinder by working medium fluid infusion entrance
Matter supplement；
Seven, working medium pressure tank is monitored by pressure sensor I, by pressure sensor II to working medium sealant supplement cylinder pressure
Power is monitored, and electric pressure signal is transferred to controller by hardwire, when pressure sensor II measured value is passed lower than pressure
When sensor I measured value, controller prompt carries out working medium supplement to working medium sealant supplement cylinder by working medium fluid infusion entrance；
Eight, pressure release purpose when safety valve I and safety valve II can realize superpressure, when pressure is more than setting value, automatic valve opening
Pressure release.
The present embodiment ORC electricity generation system working medium tank automatic Control Systems of Liquids Height generally can just go out after system long-play
The case where now carrying out working medium supplement to working medium sealant supplement cylinder, should close controller at this time, and electric check valve closes valve.
Claims (6)
1.ORC electricity generation system working medium tank automatic Control Systems of Liquids Height, it is characterised in that the ORC electricity generation system working medium tank liquid level is automatic
Control system includes working medium tank (9), working medium sealant supplement cylinder (3), liquid level sensor I (8), liquid level sensor II (5), pressure sensor
I (10), pressure sensor II (4), working medium fluid infusion pump (15), electric check valve (16), controller (6) and working medium concentration detector
(7), pressure sensor II (4) and liquid level sensor II (5) are mounted on working medium sealant supplement cylinder (3), pressure sensor I (10) and liquid
Level sensor I (8) is mounted on working medium tank (9), and the top of working medium tank (9) is provided with working medium entrances (12), the bottom of working medium tank (9)
Be provided with working medium efferent duct (13), be provided in working medium efferent duct (13) electricity generation system working medium pump (14), one end of connecting tube with
The bottom of working medium sealant supplement cylinder (3) is connected, and the other end of connecting tube is connected with the bottom of working medium tank (9), sets in connecting tube
It is equipped with working medium fluid infusion pump (15) and electric check valve (16), the working medium fluid infusion pump (15) is two-way working medium pump；
Liquid level sensor I (8), liquid level sensor II (5), pressure sensor I (10), pressure sensor II (4) and working medium concentration
Detector (7) is connect with the signal input part of controller (6) respectively, the signal output end of controller (6) respectively with working medium fluid infusion
Pump (15), electric check valve (16), electricity generation system working medium pump (14) connection.
2. ORC electricity generation system working medium tank automatic Control Systems of Liquids Height according to claim 1, it is characterised in that mended in working medium
The top of flow container (3) is provided with safety valve II (2).
3. ORC electricity generation system working medium tank automatic Control Systems of Liquids Height according to claim 1, it is characterised in that in working medium tank
(9) top is provided with safety valve I (11).
4. ORC electricity generation system working medium tank automatic Control Systems of Liquids Height according to claim 1, it is characterised in that working medium fluid infusion
The lower part of tank (3) is provided with working medium fluid infusion entrance (1).
5. ORC electricity generation system working medium tank automatic Control Systems of Liquids Height according to claim 1, it is characterised in that controller
(6) model SIMATIC S7-200PLC.
6. ORC electricity generation system working medium tank automatic Control Systems of Liquids Height according to claim 1, it is characterised in that working medium concentration
Detector (7) is arranged within the scope of the 1m of working medium tank (9).
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| CN201811117035.8A CN108897348B (en) | 2018-09-25 | 2018-09-25 | ORC power generation system working medium tank liquid level automatic control system |
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| CN201811117035.8A CN108897348B (en) | 2018-09-25 | 2018-09-25 | ORC power generation system working medium tank liquid level automatic control system |
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| CN112682118A (en) * | 2020-12-01 | 2021-04-20 | 中国船舶重工集团公司第七0三研究所 | ORC power generation system control method |
| CN112945721A (en) * | 2021-01-22 | 2021-06-11 | 湘潭大学 | Solution supplementing device and method suitable for saturated direct shear test |
| CN113576649A (en) * | 2021-07-22 | 2021-11-02 | 海杰亚（北京）医疗器械有限公司 | Electrical control system for minimally invasive tumor treatment |
| CN113759991A (en) * | 2021-09-15 | 2021-12-07 | 南京讯联智能科技有限公司 | High-position liquid supplementing device of wind power water cooling system |
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| CN113759991A (en) * | 2021-09-15 | 2021-12-07 | 南京讯联智能科技有限公司 | High-position liquid supplementing device of wind power water cooling system |
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