CN102718276B - Efficient low-temperature multi-effect evaporation sea water desalting plant - Google Patents
Efficient low-temperature multi-effect evaporation sea water desalting plant Download PDFInfo
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- CN102718276B CN102718276B CN201210241392.1A CN201210241392A CN102718276B CN 102718276 B CN102718276 B CN 102718276B CN 201210241392 A CN201210241392 A CN 201210241392A CN 102718276 B CN102718276 B CN 102718276B
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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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Abstract
The invention provides an efficient low-temperature multi-effect evaporation sea water desalting plant. The efficient low-temperature multi-effect evaporation sea water desalting plant comprises a condenser, a middle water pump, an evaporator group, a strong brine pump, a water outlet and a pipeline connected with the components, as well as a return pipe and a return valve connected between an outlet of the middle water pump and an outlet of the strong brine pump, wherein a drain valve is arranged at the outlet of the strong brine pump, when operation, firstly a TVC adjustment valve is opened so as to enable the stream into a first effective evaporator of the evaporator group, then the drain valve is turned off and the return valve is opened, after the evaporator group is fully conductive with stream, the return valve is turned off and the drain valve is again opened. By using the inventive technology scheme, the time for steam conduction is obviously reduced, seawater temperature rise speed is high, economic losses caused by production cost of heat, electricity, steam and manpower are reduced, recycle uses the heat and saves the energy; the sea water concentration can be controlled through valve, operation is simple, and maintenance amount is small.
Description
Technical field
The steam that the invention belongs to the thermal flue gas generation low-temp low-pressure that utilizes boiler of power plant carries out the seawater desalination system field, especially relates to a kind of working method of efficient low-temperature multi-effect evaporation seawater desalinization device.
Background technology
The principle of low temperature multi-effect seawater desalting system is: have the seawater of certain temperature, in vacuum environment corresponding thereto, the then condensation of first seething with excitement produces the process of fresh water.As long as pressure and temperature have possessed corresponding conditions, seawater just can seethe with excitement.In low temperature multi-effect seawater desalting system, whether namely seawater boiling whether successively of conducting of steam.When vacuum tightness reaches analog value, the temperature of seawater is depended in the boiling successively of each single-effect evaporator.
In multi-effect distilling vapour compression unit (MED+TVC) system, need each single-effect evaporator to be vacuumized in 1 to 2 hour consuming time, pass into steam from first evaporator afterwards.Walk to lead to last single-effect evaporator time used from first evaporator and also need 1 to 2 hour and pass into steam at every turn.If scaling is more serious, meeting consuming time reached more than 4 hours.For whole system, the time that the output qualified water needs is quite long.During at this, very long steam is walked to lead to and waited for, can expend a large amount of Boiler Steam, coal heat type heat, motor electric energy and people is labor force etc.Not only reduce the product water efficiency of equipment, also caused financial loss.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of efficient low-temperature multi-effect evaporation seawater desalinization device and working method, and the large-size thermal power plant, the Steel Plant that especially are applicable to coastal and island implement.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of efficient low-temperature multi-effect evaporation seawater desalinization device, comprise the condenser connected in turn, middle water pump, evaporator bank, strong brine pump, water port and the pipeline that connects aforesaid device, also comprise the loop pipe be connected between described middle exit of pump and strong brine pump discharge, on described loop pipe, return valve is set, described strong brine pump discharge place arranges bleed valve.
The method that operates described low-temperature multi-effect evaporation seawater desalinization device is as follows, first opening the TVC variable valve makes steam enter the first evaporator of described evaporator bank, then close described bleed valve, open described return valve, after treating in system in evaporator bank fully conducting steam, close described return valve, then open described bleed valve.
Advantage and positively effect that the present invention has are: adopt the technical program, steam conducting required time obviously reduces, and it is fast that seawater temperature improves speed, reduced the financial loss of being brought by production costs such as heat energy, electric energy, steam and manpowers, simple to operate, the maintenance, repair amount is little.This device has the self-regulation function to technique, can not form to system the detrimentally affects such as fouling, ponding.
The accompanying drawing explanation
Fig. 1 is device systems principle schematic of the present invention
In figure:
1, condenser 2, middle water pump 3, evaporator bank
4, strong brine pump 5, return valve 6, bleed valve
7, water port 8, loop pipe
Embodiment
As shown in Figure 1, the invention provides a kind of efficient low-temperature multi-effect evaporation seawater desalinization device, comprise the condenser 1 connected in turn, middle water pump 2, evaporator bank 3, strong brine pump 4, water port 7 and the pipeline that connects above equipment, also comprise the loop pipe 8 be connected between described middle exit of pump and strong brine pump discharge, described loop pipe is Glass Steel Tube, on described loop pipe 8, return valve 5 is set, and return valve 5 is pneumatic adjusting valve, described strong brine pump discharge place arranges bleed valve 6, and bleed valve 6 is pneumatic adjusting valve.
By previous experiences, learnt, the exhaust temperature of strong brine pump discharge reached 53 ℃ of left and right in 15 minutes, and strong brine pump discharge temperature and drain time present linear relationship.The design temperature of imitating middle water pump in view of 4-7 is 42 ℃ of left and right, and in the middle of the 1-3 effect, the design temperature of water pump is 52 ℃ of left and right, by each single-effect evaporator steam of conducting, will rapidly seawater temperature be risen to design load.After adopting the present technique transformation, the walking to lead to of steam was controlled in 20 minutes.
The equipment in the past of comparing has had improvement significantly:
The first, system is fairly simple in operation.With respect to Previous System, a bit of Glass Steel Tube loop pipe and two pneumatic adjusting valves (return valve and water discharge valve) have just been increased.
The second, do not worry seawater scaling in internal recycling temperature raising process.Because the seawater in system is in the process of internal recycle, concentration ratio can be seen on the computer monitor screen.Once, and concentration occurs that higher phenomenon occurs, just have the former seawater of being come by condenser as supply.
The 3rd, in the middle of the 4-7 effect, rate of discharge and the strong brine pump outlet flow of water pump equates it is optimum value in theory.In actual condition, situation should not realize in this.In the operation initial stage, should be the seawater flow that is approximately equal to the middle water pump of 4-7 effect by strong brine pump discharge flow set, so just can not cause the hidden danger of system ponding.
The 4th, before the steam conducting, do not worry that the strong brine pumping capacity is less times greater than the middle pump capacity of 4-7 effect.Because if bigger than normal, seawater can overflow in condenser.If the strong brine pump is less than normal a little in the flow of the middle water pump of 4-7 effect, will observe the liquid level of the 7th single-effect evaporator, carry out in good time adjustment work.
The 5th, after the steam conducting, do not worry the strong brine pump discharge flow seawater flow circulated in water pump less than normal in the middle of the 4-7 effect.Because in the middle of the 4-7 effect, pump capacity is constant, condenser can be at any time to water pump pipeline supply seawater in the middle of the 4-7 effect.In the situation that the seawater supply is arranged, the quick fouling that " dry combustion method " causes can not appear because of the excessive concentration of seawater in each single-effect evaporator yet like this.In addition, after the system conducting, due to the generation of fresh water, strong brine pump discharge flow can not be greater than the flow of circulating seawer in the middle water pump of 4-7 effect under normal circumstances.
The working process of this example: after vacuum is taken out, first opening the TVC variable valve makes steam enter first evaporator, then close the bleed valve at strong brine pump discharge place, open the return valve on the other loop pipe of strong brine pump, after treating in system in evaporator bank fully conducting steam, close the return valve on loop pipe, then open the bleed valve at strong brine pump discharge place.The switching sequence that it should be noted that valve necessarily can not change, otherwise can cause vacuum to be destroyed fully, and whole system entirely collapses.
Above one embodiment of the present of invention are had been described in detail, but described content is only preferred embodiment of the present invention, can not be considered to for limiting practical range of the present invention.All equalization variations of doing according to the present patent application scope and improvement etc., within all should still belonging to patent covering scope of the present invention.
Claims (1)
1. an efficient low-temperature multi-effect evaporation seawater desalinization device, comprise the condenser connected in turn, middle water pump, evaporator bank, the strong brine pump, water port and the pipeline that connects aforesaid device, also comprise the loop pipe be connected between described middle exit of pump and strong brine pump discharge, it is characterized in that: on described loop pipe, return valve is set, described strong brine pump discharge place arranges bleed valve;
The method that operates described low-temperature multi-effect evaporation seawater desalinization device is as follows, first opening the TVC variable valve makes steam enter the first evaporator of described evaporator bank, then close described bleed valve, open described return valve, after treating in system in evaporator bank fully conducting steam, close described return valve, then open described bleed valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210241392.1A CN102718276B (en) | 2012-07-12 | 2012-07-12 | Efficient low-temperature multi-effect evaporation sea water desalting plant |
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| CN201210241392.1A CN102718276B (en) | 2012-07-12 | 2012-07-12 | Efficient low-temperature multi-effect evaporation sea water desalting plant |
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| CN102718276A CN102718276A (en) | 2012-10-10 |
| CN102718276B true CN102718276B (en) | 2014-01-08 |
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| CN106430379A (en) * | 2016-11-08 | 2017-02-22 | 江苏润海能源科技有限公司 | Efficient low-temperature multiple-effect evaporation sea water desalination device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU581953A1 (en) * | 1976-02-16 | 1977-11-30 | Предприятие П/Я А-1097 | Apparatus for controlling the operation of a vacuum desalination plant |
| CN1837075A (en) * | 2006-04-09 | 2006-09-27 | 青岛大学 | Low-temperature multi-effect seawater desalination process |
| CN201587871U (en) * | 2009-11-27 | 2010-09-22 | 李星煜 | Multi-stage vacuum distillation sea water desalinating device |
| CN201605175U (en) * | 2009-12-29 | 2010-10-13 | 中国神华能源股份有限公司 | Low-temperature multi-effect distillation sea water desalinization device using saline water for preheating material water |
| CN101948148A (en) * | 2010-10-22 | 2011-01-19 | 河北宏润重工集团有限公司 | Energy-saving low-temperature multiple-effect seawater desalting device |
-
2012
- 2012-07-12 CN CN201210241392.1A patent/CN102718276B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU581953A1 (en) * | 1976-02-16 | 1977-11-30 | Предприятие П/Я А-1097 | Apparatus for controlling the operation of a vacuum desalination plant |
| CN1837075A (en) * | 2006-04-09 | 2006-09-27 | 青岛大学 | Low-temperature multi-effect seawater desalination process |
| CN201587871U (en) * | 2009-11-27 | 2010-09-22 | 李星煜 | Multi-stage vacuum distillation sea water desalinating device |
| CN201605175U (en) * | 2009-12-29 | 2010-10-13 | 中国神华能源股份有限公司 | Low-temperature multi-effect distillation sea water desalinization device using saline water for preheating material water |
| CN101948148A (en) * | 2010-10-22 | 2011-01-19 | 河北宏润重工集团有限公司 | Energy-saving low-temperature multiple-effect seawater desalting device |
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Effective date of registration: 20211208 Address after: 643000 whole building, No. 150, Huangjueping Road, Wuxing Street, Ziliujing District, Zigong City, Sichuan Province Patentee after: DONGFANG BOILER GROUP Co.,Ltd. Address before: 300462 No. 79, Xinxing Road, West District, economic and Technological Development Zone, Binhai New Area, Tianjin Patentee before: ZHONGHE SEAWATER DESALINATION ENGINEERING Co.,Ltd. |
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