CN106640651A - Method and system for realizing high-efficiency and energy-saving operation of liquid ring vacuum unit - Google Patents
Method and system for realizing high-efficiency and energy-saving operation of liquid ring vacuum unit Download PDFInfo
- Publication number
- CN106640651A CN106640651A CN201710009043.XA CN201710009043A CN106640651A CN 106640651 A CN106640651 A CN 106640651A CN 201710009043 A CN201710009043 A CN 201710009043A CN 106640651 A CN106640651 A CN 106640651A
- Authority
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- China
- Prior art keywords
- liquid
- polyethers
- ring vacuum
- energy
- realizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
- F04C19/004—Details concerning the operating liquid, e.g. nature, separation, cooling, cleaning, control of the supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2210/00—Fluid
- F04C2210/10—Fluid working
Abstract
The invention relates to the technical field of production equipment of polyurethane waterproof paint, and particularly relates to a method and system for realizing high-efficiency and energy-saving operation of a liquid ring vacuum unit. The method comprises the following steps: by means of a liquid ring vacuum pump, using polyether as an operating fluid to realize vacuumizing operation of a vacuum unit; performing gas-liquid separation on the polyether operating fluid after vacuumizing through a gas-liquid separator; and cooling the separated polyether through a cooler. According to the method and system for realizing high-efficiency and energy-saving operation of a liquid ring vacuum unit, the polyether is used as the operating fluid to realize vacuumizing operation of the vacuum unit, thereby avoiding the cavitation phenomenon, lowering the maintenance cost of the vacuum pump, achieving high vacuumizing efficiency and improving the final vacuum; the system has a high sucking rate and is not influenced by vaporization of the operating fluid; the sucking rate is not attenuated; and the polyether is nontoxic, nonflammable and safe, can be recycled as a raw material and has no environmental protection treatment cost.
Description
Technical field
The present invention relates to polyurethane water-proof paint production equipment technical field, more particularly to one kind realizes liquid ring vacuum unit
Energy-efficient method and system.
Background technology
Existing polyurethane water-proof paint production line adopts common water ring vacuum pump, and it uses water as working solution；Water ring is true
The empty efficiency of pump is low, typically 30% or so, preferably up to 50%；Vacuum is low, is not only because by limiting in structure
System, it is often more important that limited by working solution saturated vapour pressure.Make working solution with water, ultimate pressure can only achieve 2000～
4000Pa；A small amount of raw material can be brought in working solution during Water-ring vacuum pump operation, when operation a period of time need to change working solution,
All kinds of materials are carried in water to impact environment, and to environmental protection pressure is brought.
Current vaccum-pumping equipment is mainly water ring vacuum pump, using water as working solution.The performance of pump by Water Temperature compared with
Greatly.When water temperature is higher, it may appear that cavitation phenomenons causes water ring vacuum pump vane, the pump housing, end cap to damage, while when water temperature is high,
Working solution vaporization causes final vacuum to decline and rate of air sucked in required declines, and has had a strong impact on the performance of pump.Cause low compared with conglomerate true
Empty pump condition can not use water ring vacuum pump.Meanwhile, pollution of the material to water causes follow-up water treatment facilities pressure big, to ring
Border impacts.Water ring vacuum pump operation principle：When the direction indicated during impeller is by figure turns clockwise, water is thrown to by impeller
Surrounding, due to the effect of centrifugal force, water defines a closed circle for being similar to equal thickness for being decided by pump chamber shape.Water ring
Upper portion inner surface it is just tangent with impeller hub, the lower inner surface of water ring just contacts (actually leaf with blade tip
Piece has certain insertion depth in water ring).A crescent-shaped space is now formed between impeller hub and water ring, and this is empty
Between again several equal loculuses of lobe numbers are divided into by impeller.If 0 ° of the top with impeller is as starting point, then impeller is in rotation
The volume of loculus changes from small to big when turning first 180 °, and communicates with the air entry on end face, and now gas is inhaled into, when air-breathing ends
When loculus then with air entry completely cut off；When impeller continues to rotate, loculus from large to small, is compressed gas；When loculus and exhaust
When mouth is communicated, gas is just discharged outside pump.
Vacuum dehydration is the important process stage during polyurethane production, and vacuum directly influences vacuum dewatering process
Production efficiency.But the water ring vacuum pump vacuum for making working solution with water is limited to water saturation vapour pressure, and end vacuum pressure is only
2000～4000Pa can be reached so that dewatering time is long in production process, affect production efficiency.With the operation of pump, work
The temperature of liquid is increased, and the higher water saturation vapour pressure of temperature is also increased, for example：During 25 degree of water temperature, water saturation is steamed
Air pressure is 3169Pa, and when water temperature rises to 40 degree, water saturation vapour pressure is 7784Pa.The rising of water saturation vapour pressure
So that the vacuum capability of vavuum pump is greatly lowered.Meanwhile, in vacuum, a small amount of material in reactor can be taken out therewith
In entering vavuum pump, so as to pollute to the water as working solution so that the COD contents of water gradually rise, when changing working solution
Certain negative effect can be caused to environment.
Therefore, in order to solve the above problems, it is badly in need of a kind of new method for realizing that liquid ring vacuum unit is energy-efficient of invention
And system.
The content of the invention
It is an object of the invention to：A kind of method and system for realizing that liquid ring vacuum unit is energy-efficient is provided,
The invention provides following proposal：
A kind of method for realizing that liquid ring vacuum unit is energy-efficient, including：
Using liquid-ring vacuum pump, using polyethers as working solution, that realizes vacuum pump set vacuumizes work.
Preferably, the described method for realizing that liquid ring vacuum unit is energy-efficient also includes：
Polyethers working solution after being vacuumized using gas-liquid separator carries out gas-liquid separation；
The polyethers after separation is cooled down using cooler.
Preferably, the described method for realizing that liquid ring vacuum unit is energy-efficient also includes：
The polyethers after cooling is filtered using filter；
Polyurethane is produced using polyethers of the polyurethane production equipment after filtering as raw material.
Preferably, the described method for realizing that liquid ring vacuum unit is energy-efficient also includes：
Empty after being purified to the waste gas of gas-liquid separator sub-department using catalytic converter.
Further, a kind of liquid ring vacuum machine set system for realizing the liquid ring vacuum unit efficient energy-saving method, including：
Liquid-ring vacuum pump, using polyethers as working solution, for realize vacuum pump set work is vacuumized.
Preferably, the described system for realizing that liquid ring vacuum unit is energy-efficient also includes：
Gas-liquid separator, for the polyethers working solution after vacuumizing gas-liquid separation is carried out；
Cooler, for cooling down to the polyethers after separation.
Preferably, the described system for realizing that liquid ring vacuum unit is energy-efficient also includes：
Filter, for the polyethers after cooling to be filtered；
Polyurethane production equipment, for producing polyurethane by raw material of the polyethers after filtration.
Preferably, the described system for realizing that liquid ring vacuum unit is energy-efficient also includes：
Catalytic converter, for emptying after purifying to the waste gas of gas-liquid separator sub-department.
Preferably, the described system for realizing that liquid ring vacuum unit is energy-efficient also includes：
Polyethers storage tank, for depositing, conveying polyethers.
Preferably, the described system for realizing that liquid ring vacuum unit is energy-efficient also includes：
Liquid level gauge, for measuring the content of polyether in the gas-liquid separator；
The liquid level gauge is electrically connected with fluid supplement solenoid valve, and the fluid supplement solenoid valve is connected with the polyethers storage tank.
The beneficial effect that the present invention is produced：
The method and system for realizing that liquid ring vacuum unit is energy-efficient disclosed in this invention, using polyethers as work
Liquid, realize vacuum pump set vacuumizes work, it is to avoid cavitation phenomenons, reduces the maintenance cost of vavuum pump, and the efficiency for vacuumizing
Height, final vacuum is improved；Rate of air sucked in required is big, affects without working solution vaporization, and rate of air sucked in required will not decay；Polyethers is nontoxic, nonflammable, peace
Entirely, can be as raw material reuse, without environmentally friendly processing cost.
Description of the drawings
Fig. 1 is the block diagram of the method for realizing that liquid ring vacuum unit is energy-efficient of the present invention；
Fig. 2 is the structural representation of the system for realizing that liquid ring vacuum unit is energy-efficient of the present invention.
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described enforcement
Example is a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship, merely to
Be easy to description the present invention and simplify description, rather than indicate or imply indication device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected；Can
Being to be mechanically connected, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
It is shown in Figure 1, a kind of method for realizing that liquid ring vacuum unit is energy-efficient, including：
Using liquid-ring vacuum pump, using polyethers as working solution, that realizes vacuum pump set vacuumizes work.
The described method for realizing that liquid ring vacuum unit is energy-efficient also includes：
Polyethers working solution after being vacuumized using gas-liquid separator carries out gas-liquid separation；
The polyethers after separation is cooled down using cooler.
The described method for realizing that liquid ring vacuum unit is energy-efficient also includes：
The polyethers after cooling is filtered using filter；
Polyurethane is produced using polyethers of the polyurethane production equipment after filtering as raw material.
The described method for realizing that liquid ring vacuum unit is energy-efficient also includes：
Empty after being purified to the waste gas of gas-liquid separator sub-department using catalytic converter.
It is shown in Figure 2, a kind of liquid ring vacuum machine set system for realizing the liquid ring vacuum unit efficient energy-saving method, bag
Include：
Liquid-ring vacuum pump, using polyethers as working solution, for realize vacuum pump set work is vacuumized；
The described system for realizing that liquid ring vacuum unit is energy-efficient also includes：
Gas-liquid separator, for the polyethers working solution after vacuumizing gas-liquid separation is carried out；
Cooler, for cooling down to the polyethers after separation.
The described system for realizing that liquid ring vacuum unit is energy-efficient also includes：
Filter, for the polyethers after cooling to be filtered；
Polyurethane production equipment, for producing polyurethane by raw material of the polyethers after filtration.The polyurethane production equipment
For prior art, do not show in concrete structure diagram, refer to correlation technique data, here is not repeated.
The described system for realizing that liquid ring vacuum unit is energy-efficient also includes：
Catalytic converter, for emptying after purifying to the waste gas of gas-liquid separator sub-department.
Preferably, the described system for realizing that liquid ring vacuum unit is energy-efficient also includes：
Polyethers storage tank, for depositing, conveying polyethers.
Preferably, the described system for realizing that liquid ring vacuum unit is energy-efficient also includes：
Liquid level gauge, for measuring the content of polyether in the gas-liquid separator；
The liquid level gauge is electrically connected with fluid supplement solenoid valve, and the fluid supplement solenoid valve is connected with the polyethers storage tank, the liquid
Position meter and the fluid supplement solenoid valve are electrically connected with the controller respectively, and the controller adopts the CPU element of model E8718, institute
The device that the system of stating includes is connected by pipeline.
The method and system for realizing that liquid ring vacuum unit is energy-efficient disclosed in this invention, using polyethers as work
Liquid, realize vacuum pump set vacuumizes work, it is to avoid cavitation phenomenons, reduces the maintenance cost of vavuum pump, and the efficiency for vacuumizing
Height, final vacuum is improved；Rate of air sucked in required is big, affects without working solution vaporization, and rate of air sucked in required will not decay；Polyethers is nontoxic, nonflammable, peace
Entirely, can be as raw material reuse, without environmentally friendly processing cost.
Liquid-ring vacuum pump described in the present embodiment is connected with the cooler by recovery pipe, and the polyethers after cooling is entered
The liquid-ring vacuum pump is recycled；Liquid-ring vacuum pump, as working solution, without cavitation, final vacuum height, is evacuated using polyethers
Amount is big；Working solution returns pump and is continuing with into Jing working solutions cooler cooling after gas-liquid separator separates, pollution-free, clean,
Energy-conservation.It is low that the present embodiment changes vacuum limit degree of original water ring vacuum pump in polyurethane water-proof paint production process, temperature
Degree Raise vacuum limit degree is further substantially reduced, and working water causes the problem of environmental pollution when changing.This kind of efficient section
Energy liquid ring vacuum unit adopts the polyethers of one of polyurethane water-proof paint raw materials for production as working solution, while entering to blade shape
Row optimization, using the low saturated vapour pressure of polyethers, insensitivity to temperature and its can be recycled as raw material
Environmental protection characteristic, is lifted from every side to existing equipment.
The present embodiment lower saturated vapour pressure of water that compares means the higher ability for vacuumizing, so as to significantly shorten life
The time of dehydration process, improve production efficiency during product；The width of High variation is risen with temperature using polyethers saturated vapour pressure
Degree is little, production can be continuously in actual motion and brings stable vacuum dehydration environment, beneficial to the lifting of product quality；Polyethers makes
After with a period of time, can be used to produce as raw material again through simple filtration, not produce any waste water, belong to environmentally friendly friendly
Solution；Sewage treatment equipment need not be equipped with, equipment investment and later stage operating cost is reduced.
Using polyethers as working solution, 200 DEG C of boiling point under polyethers normal pressure, boiling point height is avoided liquid ring vacuum unit in the present embodiment
Cavitation phenomenons.Polyethers is difficult vaporization, improves final vacuum and rate of air sucked in required.Using polyethers as the liquid ring vacuum machine of working solution
Group, without cavitation phenomenons, final vacuum is high, rate of air sucked in required is discharged greatly, without waste liquid, efficient, energy-conservation, cleaning, safety.Energy-efficient liquid
Ring vacuum pump set is using polyethers as working solution, boiling point under polyethers normal pressure：200 DEG C avoid liquid rotary pump from cavitation phenomenons occur.Polyethers
Flow at low temperatures is good.Polyethers has good lubricity, based on the polarity of polyethers, adds with relatively low viscosity,
The highly stable lubricant film with big absorption affinity and bearing capacity can be formed under nearly all lubricating status, with relatively low
Coefficient of friction and stronger anti-shear ability.The lubricity of polyethers is better than Dormant oils.Antioxidative stabilizer is high：In the presence of oxidation
The easy chain rupture of polyethers, generates low molecular carbonyl and carbonyls, vapors away rapidly at high temperature.Therefore polyethers is at high temperature
Deposit and colloid substance will not be given birth to, viscosity is gradually lowered without raising.Act on good froth breaking：Polyethers can be used as disappearing
Infusion, it is to avoid foam is produced in vapour liquid separator.Hypotoxicity：Polyethers toxicity is very low, and effect on environment is little.Working solution adds：
Polyethers is stored in head tank, equipment liquid level gauge band transporting function in separator, when liquid level is less than setting value, starts fluid infusion electromagnetism
Valve carries out supplementing working solution.Separator exhaust outlet can carry a small amount of working solution polyethers secretly, discharge after dusty gas process.
Liquid-ring vacuum pump described in the present embodiment is under same temperature conditionss, and either rate of air sucked in required, vacuum, new pump is equal
It is much better than the former pump using water as working solution；Using water as the former pump of working solution, when temperature is raised, it may appear that cavitation phenomenons is made
Damage into water ring vacuum pump vane, the pump housing, end cap, while when water temperature is high, working solution vaporization causes final vacuum to decline and take out
Tolerance declines, and has had a strong impact on the performance of pump；And for new pump, temperature raises the hydraulic performance decline that causes almost can be with
Ignore.Liquid-ring vacuum pump is using polyethers as working solution, it is to avoid cavitation phenomenons, improves final vacuum and pumping
Amount.Working solution polyethers is separated together with pumped gas into gas-liquid separator, is evacuated body Jing gas-liquid separators upper end row
Gas port is discharged.Working solution polyethers enters working solution cooler from gas-liquid separator lower end, liquid rotary pump is returned after cooling and continues to make
With cleaning, energy-conservation, efficient, safety.There is a small amount of polyethers to be entrained the discharge of Jing exhaust outlets in running, when in gas-liquid separator
When liquid level is less than setting value, Jing automatic electromagnetic valves supplement working solution polyethers.
Finally it should be noted that：Various embodiments above only to illustrate technical scheme, rather than a limitation；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, either which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence disengaging various embodiments of the present invention technology of appropriate technical solution
The scope of scheme.
Claims (10)
1. a kind of method for realizing that liquid ring vacuum unit is energy-efficient, it is characterised in that：Including：
Using liquid-ring vacuum pump, using polyethers as working solution, that realizes vacuum pump set vacuumizes work.
2. the method for realizing that liquid ring vacuum unit is energy-efficient according to claim 1, it is characterised in that：Also include：
Polyethers working solution after being vacuumized using gas-liquid separator carries out gas-liquid separation；
The polyethers after separation is cooled down using cooler.
3. the method for realizing that liquid ring vacuum unit is energy-efficient according to claim 2, it is characterised in that：Also include：
The polyethers after cooling is filtered using filter；
Polyurethane is produced using polyethers of the polyurethane production equipment after filtering as raw material.
4. the method for realizing that liquid ring vacuum unit is energy-efficient according to claim 3, it is characterised in that：Also include：
Empty after being purified to the waste gas of gas-liquid separator sub-department using catalytic converter.
5. a kind of liquid ring vacuum machine system for realizing the liquid ring vacuum unit efficient energy-saving method as described in arbitrary in claim 1-4
System, it is characterised in that：Including：
Liquid-ring vacuum pump, using polyethers as working solution, for realize vacuum pump set work is vacuumized.
6. the system for realizing that liquid ring vacuum unit is energy-efficient according to claim 5, it is characterised in that：Also include：
Gas-liquid separator, for the polyethers working solution after vacuumizing gas-liquid separation is carried out；
Cooler, for cooling down to the polyethers after separation.
7. the system for realizing that liquid ring vacuum unit is energy-efficient according to claim 6, it is characterised in that：Also include：
Filter, for the polyethers after cooling to be filtered；
Polyurethane production equipment, for producing polyurethane by raw material of the polyethers after filtration.
8. the system for realizing that liquid ring vacuum unit is energy-efficient according to claim 7, it is characterised in that：Also include：
Catalytic converter, for emptying after purifying to the waste gas of gas-liquid separator sub-department.
9. the system for realizing that liquid ring vacuum unit is energy-efficient according to claim 8, it is characterised in that：Also include：
Polyethers storage tank, for depositing, conveying polyethers.
10. the system for realizing that liquid ring vacuum unit is energy-efficient according to claim 9, it is characterised in that：Also include：
Liquid level gauge, for measuring the content of polyether in the gas-liquid separator；
The liquid level gauge is electrically connected with fluid supplement solenoid valve, and the fluid supplement solenoid valve is connected with the polyethers storage tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710009043.XA CN106640651A (en) | 2017-01-06 | 2017-01-06 | Method and system for realizing high-efficiency and energy-saving operation of liquid ring vacuum unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710009043.XA CN106640651A (en) | 2017-01-06 | 2017-01-06 | Method and system for realizing high-efficiency and energy-saving operation of liquid ring vacuum unit |
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| CN106640651A true CN106640651A (en) | 2017-05-10 |
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ID=58843194
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| CN201710009043.XA Pending CN106640651A (en) | 2017-01-06 | 2017-01-06 | Method and system for realizing high-efficiency and energy-saving operation of liquid ring vacuum unit |
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Citations (7)
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| DK147396B (en) * | 1978-07-24 | 1984-07-16 | Siemens Ag | WASHING PUMP PLANT - ISAES FOR EXTRACTION OF GASIC ACID ANHYDRIDES OR HALOGENE ANHYRIDES |
| DE3533017A1 (en) * | 1985-09-16 | 1987-03-26 | Ebner Anlagen & Apparate | METHOD FOR GAS DELIVERY AND DEVICE THEREFOR |
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| WO2014115350A1 (en) * | 2013-01-22 | 2014-07-31 | 三菱電機株式会社 | Refrigerator and compressor |
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