CN103373785A - Cooling concentration and reverse osmosis combined salt-containing water concentrating method and equipment - Google Patents
Cooling concentration and reverse osmosis combined salt-containing water concentrating method and equipment Download PDFInfo
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- CN103373785A CN103373785A CN2012101218118A CN201210121811A CN103373785A CN 103373785 A CN103373785 A CN 103373785A CN 2012101218118 A CN2012101218118 A CN 2012101218118A CN 201210121811 A CN201210121811 A CN 201210121811A CN 103373785 A CN103373785 A CN 103373785A
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Abstract
The invention relates to the technical field of salt-containing water concentration, and in particular relates to cooling concentration and reverse osmosis combined salt-containing water concentrating method and equipment. The method comprises the steps of by utilizing the characteristics that the solubility of some salts such as NaSO4 is very low in low temperature water and quickly increased after the temperature is raised, firstly cooling a water solution containing the salts to precipitate out salt and reduce the salt concentration, heating, concentrating by adopting a reverse osmosis technology, cooling the concentrated strong brine again to precipitate out the salt, heating again after the salt content is reduced and carrying out reverse osmosis again. By adopting the method, the concentration treatment cost of the salt-containing water can be greatly reduced; especially for recycled waste fluids taking NaSO4 and NaCl as main salts, which are produced by devices for producing desalted water through removing the salt in the water by adopting an ion exchange method in the resin regeneration process in enterprises such as power plants, chemical plants and the like, the method is most suitable; compared with traditional evaporative crystallization, the method has the advantages that the energy consumption can be significantly reduced and the cost is saved.
Description
Technical field
The present invention relates to brackish water concentration technique field, especially relate to brackish water concentration method and equipment that a kind of cooling concentration and reverse osmosis combine.
Background technology
Some salt (as
NaSO 4) solubleness in water at low temperature is very low, the solubleness increase was very fast after temperature rose, utilize this characteristic, the aqueous solution that contains this salt can be cooled off first, allow salt analyze, salt concn descends, and then heating, the employing reverse osmosis technology is concentrated, and the strong brine after concentrating cools off, allows salt analyze again, and saltiness reheats, carries out reverse osmosis after descending; Processing 30 degrees centigrade, concentration is 7%
NaSO 4The aqueous solution is example, and concentration is 7%
NaSO 4The aqueous solution enters brackish water cooling concentration tower, and drop in temperature is to zero degrees celsius,
NaSO 4Solubleness drop to about 4.9g/100H
2O, part
NaSO 4Can crystallize out, the brackish water density loss is to about 4.6%; Concentration is 4.6%
NaSO 4Be heated to 30 degrees centigrade, its solubleness rises to about 40.8g
NaSO 4/ 100H
2O just can enter reverse osmosis unit and concentrate, and being concentrated to concentration through reverse osmosis unit is about 7%
NaSO 4The aqueous solution enters brackish water cooling concentration tower again.
Summary of the invention
(1) the brackish water concentration method and the equipment that combine of a kind of cooling concentration and reverse osmosis may further comprise the steps:
Step 1: extraneous next brackish water enters from cooling concentration tower top, from up to down spray by water distributor, air enters from the bottom, bottom-up motion under the effect of induced draft fan, air contacts in tower and mass-and heat-transfer with brackish water, part water enters air from cat head emptying, and brackish water obtains cooling concentration;
Step 2: the brackish water that obtains cooling concentration enters analyses salt pond (2) and carries out separating of solid salt and brackish water, brackish water after the separation enters well heater (3) and heats, and then enter reverse osmosis unit (4) and carry out reverse osmosis concentration and process, the strong brine that reverse osmosis produces enters the cooling concentration tower again.
(2) have following annexation between the equipment of the present invention:
Brackish water cooling concentration tower (1) bottom with analyse salt pond (2) and link to each other, analyse that salt pond (2) links to each other with well heater (3), well heater (3) links to each other with reverse osmosis unit (4), reverse osmosis unit (4) links to each other with brackish water cooling concentration tower (1).
(3) its similar of the described brackish water cooling concentration of step 1 tower is made of tower body, blast inlet, water distributor, induced draft fan four major parts in the mechanical-draft cooling tower that is used for circulating water.Be that with the difference of the mechanical-draft cooling tower that is used for circulating water its inside does not arrange filler, wish in the operational process that the water yield that air leads out is the bigger the better, and does not consider the loss of water.
The method of brackish water concentration of the present invention has following characteristics and effect:
The first, take full advantage of the purpose of the cold realization reduction salt concn of air cold season, for reverse osmosis provides condition;
The second, air plays the dual function of lowering the temperature and taking moisture content out of in this technological process;
Three, utilize the low advantage of reverse osmosis unit energy consumption to reduce the energy expenditure of brackish water concentration process;
Four, will concentrate and the crystallisation process organic assembling, can directly obtain crystal salt and de-mineralized water, and the common thermal evaporation treatment process such as multiple-effect evaporation can only obtain high density salt solution usually, and then the devaporation crystallization.
Description of drawings
Fig. 1 is the processing unit synoptic diagram of the invention process example, wherein:
1: brackish water cooling concentration tower;
2: analyse the salt pond;
3: well heater;
4: reverse osmosis unit.
Embodiment
As shown in Figure 1, method of the present invention, undertaken by following technology and equipment:
Extraneous next brackish water cooling concentration tower top enters, and from up to down sprays by water distributor, and air enters from the bottom, bottom-up motion under the effect of induced draft fan, air contacts in tower and mass-and heat-transfer with brackish water, and part water enters air from cat head emptying, and brackish water obtains cooling concentration; The brackish water of cooling concentration enters analyses salt pond (2) and carries out separating of solid salt and brackish water, brackish water after the separation enters well heater (3) and heats, and then enter reverse osmosis unit (4) and carry out reverse osmosis concentration and process, the strong brine that reverse osmosis produces enters the cooling concentration tower again.
As shown in Figure 1, the used brackish water cooling concentration tower concrete structure of method of the present invention is as follows:
Similar is made of tower body, blast inlet, water distributor, induced draft fan four major parts in the common mechanical-draft cooling tower that is used for circulating water.The tower body bottom is gas inlet, and the gas inlet bottom is that water collecting basin, upper space are that cooling concentration chamber, top, cooling concentration chamber are water distributor, and water distributor top is induced draft fan, and induced draft fan top is drain.
Above-described embodiment is described preferred implementation of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that the common engineering technical personnel in this area make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (3)
1. the brackish water concentration method and the equipment that combine of a cooling concentration and reverse osmosis may further comprise the steps:
Step 1: extraneous next brackish water enters from cooling concentration tower top, from up to down spray by water distributor, air enters from the bottom, bottom-up motion under the effect of induced draft fan, air contacts in tower and mass-and heat-transfer with brackish water, part water enters air from cat head emptying, and brackish water obtains cooling concentration;
Step 2: the brackish water that obtains cooling concentration enters analyses salt pond (2) and carries out separating of solid salt and brackish water, brackish water after the separation enters well heater (3) and heats, and then enter reverse osmosis unit (4) and carry out reverse osmosis concentration and process, the strong brine that reverse osmosis produces enters the cooling concentration tower again.
2. have following annexation between the equipment of the present invention:
Brackish water cooling concentration tower (1) bottom with analyse salt pond (2) and link to each other, analyse that salt pond (2) links to each other with well heater (3), well heater (3) links to each other with reverse osmosis unit (4), reverse osmosis unit (4) links to each other with brackish water cooling concentration tower (1).
3. its similar of brackish water cooling concentration tower of the present invention is made of tower body, blast inlet, water distributor, induced draft fan four major parts in the mechanical-draft cooling tower that is used for circulating water; Be that with the difference of the mechanical-draft cooling tower that is used for circulating water its inside does not arrange filler, wish in the operational process that the water yield that air leads out is the bigger the better, and does not consider the loss of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101218118A CN103373785A (en) | 2012-04-25 | 2012-04-25 | Cooling concentration and reverse osmosis combined salt-containing water concentrating method and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101218118A CN103373785A (en) | 2012-04-25 | 2012-04-25 | Cooling concentration and reverse osmosis combined salt-containing water concentrating method and equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103373785A true CN103373785A (en) | 2013-10-30 |
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|---|---|---|---|
| CN2012101218118A Pending CN103373785A (en) | 2012-04-25 | 2012-04-25 | Cooling concentration and reverse osmosis combined salt-containing water concentrating method and equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104843921A (en) * | 2015-04-30 | 2015-08-19 | 北京朗新明环保科技有限公司南京分公司 | Low temperature evaporation type high-salinity wastewater treatment device |
| CN104843922A (en) * | 2015-04-30 | 2015-08-19 | 北京朗新明环保科技有限公司南京分公司 | Low-temperature evaporative type high-salt wastewater treatment device using wastewater waste heat |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1408647A (en) * | 2001-09-25 | 2003-04-09 | 袁一军 | Process for producing fresh water by brine desalination |
| JP2011177600A (en) * | 2010-02-26 | 2011-09-15 | Hitachi Ltd | Seawater desalination system |
| CN102285738A (en) * | 2011-08-15 | 2011-12-21 | 湖南邦普循环科技有限公司 | Treatment method of high-salinity waste water in waste lithium battery recovering industry |
| CN202860146U (en) * | 2012-03-26 | 2013-04-10 | 郭朝军 | Combined equipment for concentrating salt-containing water |
-
2012
- 2012-04-25 CN CN2012101218118A patent/CN103373785A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1408647A (en) * | 2001-09-25 | 2003-04-09 | 袁一军 | Process for producing fresh water by brine desalination |
| JP2011177600A (en) * | 2010-02-26 | 2011-09-15 | Hitachi Ltd | Seawater desalination system |
| CN102285738A (en) * | 2011-08-15 | 2011-12-21 | 湖南邦普循环科技有限公司 | Treatment method of high-salinity waste water in waste lithium battery recovering industry |
| CN202860146U (en) * | 2012-03-26 | 2013-04-10 | 郭朝军 | Combined equipment for concentrating salt-containing water |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104843921A (en) * | 2015-04-30 | 2015-08-19 | 北京朗新明环保科技有限公司南京分公司 | Low temperature evaporation type high-salinity wastewater treatment device |
| CN104843922A (en) * | 2015-04-30 | 2015-08-19 | 北京朗新明环保科技有限公司南京分公司 | Low-temperature evaporative type high-salt wastewater treatment device using wastewater waste heat |
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Application publication date: 20131030 |