CN104944444A - Method for preparing salt from high-sodium-sulfate salt lake water - Google Patents
Method for preparing salt from high-sodium-sulfate salt lake water Download PDFInfo
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- CN104944444A CN104944444A CN201410125175.5A CN201410125175A CN104944444A CN 104944444 A CN104944444 A CN 104944444A CN 201410125175 A CN201410125175 A CN 201410125175A CN 104944444 A CN104944444 A CN 104944444A
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- lake water
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- salt lake
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Abstract
The invention discloses a method for preparing salt from high-sodium-sulfate salt lake water, which mainly comprises the following steps: sucking high-sodium-sulfate salt lake water into a frozen nitre tank in summer, concentrating to the Baume degree of 26-32 by solarization, freezing to remove nitre when the temperature is -25 DEG C below in winter, sucking the nitre-removed brine into a regulating tank in next summer, concentrating to the Baume degree of 24.5-25 by solarization, sucking into a crystallizing tank, and crystallizing by spreading and solarization. Compared with the prior art, the method disclosed by the invention can effectively remove nitre in the lake water or brine, and thus, greatly enhances the purity of the prepared salt. Especially by using the temperature change of the natural world to remove the nitre, the method greatly lowers the nitre removal energy consumption and further lowers the production cost.
Description
Technical field
The present invention relates to the method for a kind of high sodium sulfate type salt lake water salt manufacturing.
Background technology
Current salt lake water carries out in salt manufacturing, particularly with in the process of class saltwater lake lake water, high sodium sulfate type salt lake one (bittern) for raw material salt manufacturing, because in lake water, sodium sulphate content is higher, one service network processes according to the following procedure: first shine evaporation and concentrating through beach, entering high pond of steaming again is concentrated into saturated, then carries out evaporation in halogen storehouse and carries nitre, afterwards, again bittern is carried out crystallization salt manufacturing, the method made salt impurity content is high.
Summary of the invention
The object of this invention is to provide a kind of method utilizing the salt manufacturing of high sodium sulfate type salt lake water, particularly a kind ofly utilize high sodium sulfate type salt lake water to produce the method for refined salt.
The object of the invention is by following process implementation: in summer, nitre pond is frozen in the suction of high sodium sulfate type salt lake water, it is made to be concentrated into 26 ~ 32 degree Beaume by Exposure to Sunlight, freezing except nitre to carrying out when winter temperature is below-25 DEG C, bittern suction equalizing tank Exposure to Sunlight after nitre is concentrated to 24.5 ~ 25 degree Beaume by summer in the coming year again, and then suction crystallizing pond teds and carries out crystallization.
Detailed process is as follows:
Exposure to Sunlight concentrates: transfer lake water summer to concentration basin, concentrated by day smile, and to 26 ~ 32 degree Beaume, suction halogen storehouse stores.
Freezing except nitre: winter, when temperature is lower than subzero less than 25 degree, by the freezing pond of bittern suction concentrated for Exposure to Sunlight except nitre, depth of water controls within 60 centimetres, constantly the saltcake of crystallization is pulled out, obtain sal glauberi, and constantly detect sulfate radical content in bittern, obtain salt manufacturing bittern when bittern is concentrated into when sulfate radical content is less than or equal to 12 grams often liter, salt manufacturing bittern suction halogen storehouse is stored; In above-mentioned salt manufacturing bittern, sulfate radical content is preferably less than or equal to 8 grams often liter.
Convert halogen: above-mentioned salt manufacturing bittern preferably controls below 23 degree Beaume, when salt manufacturing bittern concentration regulates more than being blended into fresh water during 23 degree Beaume, to prevent salt-pepper noise in halogen storehouse.
Equalizing tank concentrates: to Second Year spring and summer season, then the bittern suction equalizing tank stored in halogen storehouse is concentrated to 24.5 ~ 25 degree Beaume by Exposure to Sunlight.
Crystallization: the bittern suction crystallizing pond being concentrated to 24.5 ~ 25 degree Beaume is tedded and carries out crystallization, gained crystallization will be tedded and fish, stacking, and namely obtain salt of the present invention.
Row's bittern operation 2 ~ 5 times is preferably carried out: namely carry out in evaporation and crystal process in crystallizing pond in above-mentioned crystallisation process, have a large amount of salting out, discharge old halogen when sodium magnesium ratio in bittern is less than 1.2, then in crystallizing pond, inject new halogen proceed crystallization.
Beach preferably after 4 to 5 circulations, then is shone gained crystallization and is carried out that machinery is fished, stacking by the operation of above-mentioned row's bittern.
As improvement, in the spring and summer season of Second Year, in conversion pool, the sal glauberi that winter extracts is dissolved in salt lake water again and transforms: first lake water sodium chloride concentration is adjusted to 13 ~ 16 degree Beaume, then winter being dissolved into sodium chloride concentration by freezing produced sal glauberi is in the salt lake water of 13 ~ 16 degree Beaume, concentration is made to reach more than 26 degree Beaume, preferably 26 ~ 32 degree Beaume, in conversion pool at temperature 22.8 ~ 36.2 DEG C, sal glauberi is converted into thenardite.
Compared with prior art, method of the present invention can remove the nitre in lake water or bittern effectively, and thus produced purity salt improves greatly, and the change that particularly make use of natural temperature is carried out, except nitre, except nitre energy consumption reduces greatly, and then reducing production cost.
Embodiment
embodiment 1: in summer, nitre pond is frozen in lake water suction, it is made to be concentrated into 26 ~ 32 degree Beaume by Exposure to Sunlight, carry out freezing except nitre when winter temperature is below ~ 25 DEG C, detailed process is as follows: transfer lake water summer to 6 months winters, the lake water concentration of on average transferring is at 17 degree Beaume, need by Exposure to Sunlight in summer concentrate to 26 ~ 32 degree Beaume, it is freezing except caldo depth requirements is below 60 centimetres, winter is subzero less than 25 degree time, constantly the nitre of crystallization is pulled out, obtain sal glauberi to store in addition, when the bittern after nitre is less than or equal to 18 degree Beaume, bittern suction halogen storehouse is stored, to Second Year spring and summer season, then the bittern suction equalizing tank Exposure to Sunlight stored in halogen storehouse is concentrated to 24.5 ~ 25 degree Beaume, then suction crystallizing pond teds and carries out crystallization, gained crystallization will be tedded fish, stacking, namely obtain salt of the present invention.
embodiment 2:
Transfer lake water to concentration basin in summer, concentrated by day smile, to 26 ~ 32 degree Beaume, suction halogen storehouse stores.
Winter, when temperature is lower than subzero less than 25 degree, by the freezing pond of bittern suction concentrated for Exposure to Sunlight except nitre, depth of water controls within 60 centimetres, constantly the saltcake of crystallization is pulled out, obtain sal glauberi, and constantly detect sulfate radical content in bittern, salt manufacturing bittern is obtained when bittern is concentrated into when sulfate radical content is less than or equal to 12 grams often liter, salt manufacturing bittern suction halogen storehouse is stored, salt manufacturing bittern controls below 23 degree Beaume, when salt manufacturing bittern concentration regulates more than being blended into fresh water during 23 degree Beaume, to prevent salt-pepper noise in halogen storehouse.
To Second Year spring and summer season, the bittern suction equalizing tank stored in halogen storehouse is concentrated to 24.5 ~ 25 degree Beaume by Exposure to Sunlight, suction crystallizing pond teds and carries out crystallization, and detect the sodium magnesium ratio of bittern at any time, when in bittern, sodium magnesium ratio is less than 1.2, discharge old halogen, from equalizing tank, the new halogen of suction proceeds to ted crystallization again, repeat said process 2 to 5 times, namely circulate into new halogen, ted crystallization and arrange old halogen process 2 to 5 times, again beach is shone gained crystallization and carry out that machinery is fished, stacking, namely obtain salt of the present invention.
Above-mentioned enter new halogen, ted crystallization and arrange old halogen process and be preferably circulation and carry out 4 to 5 times, then beach is shone gained crystallization and carry out that machinery is fished, stacking, no longer another citing repeats.
In the spring and summer season of Second Year, in conversion pool, freezing for the winter sal glauberi obtained except nitre is dissolved in salt lake water again and transforms: first lake water sodium chloride concentration is adjusted to 13 ~ 16 degree Beaume, then freezing for the winter sal glauberi obtained except nitre being dissolved into sodium chloride concentration is in the salt lake water of 13 ~ 16 degree Beaume, concentration is made to reach 26 ~ 32 degree Beaume, depth of water controls within 60 centimetres, Exposure to Sunlight is passed through in conversion pool, make temperature reach 22.8 ~ 36.2 DEG C, sal glauberi is converted into thenardite.
Claims (10)
1. a method for high sodium sulfate type salt lake water salt manufacturing, is characterized in that main process is as follows:
Exposure to Sunlight concentrates: transfer lake water summer to concentration basin, undertaken being concentrated into 26 ~ 32 degree Beaume by day smile, and suction halogen storehouse stores;
Freezing except nitre: winter, when temperature is lower than subzero less than 25 degree, by the freezing pond of bittern suction concentrated for Exposure to Sunlight except nitre, depth of water controls within 60 centimetres, constantly crystallization is pulled out, obtain sal glauberi, and constantly detect sulfate radical content in bittern, obtain salt manufacturing bittern when bittern is concentrated into when sulfate radical content is less than or equal to 12 grams often liter, salt manufacturing bittern suction halogen storehouse is stored;
Convert halogen: above-mentioned salt manufacturing bittern controls below 23 degree Beaume, when salt manufacturing bittern concentration regulates more than being blended into fresh water during 23 degree Beaume;
4 equalizing tanks concentrate: in Second Year spring and summer season, then the bittern suction equalizing tank stored in halogen storehouse is concentrated to 24.5 ~ 25 degree Beaume by Exposure to Sunlight;
Crystallization: the bittern suction crystallizing pond being concentrated to 24.5 ~ 25 degree Beaume is tedded and carries out crystallization, gained crystallization will be tedded and fish, stacking.
2. the method for high sodium sulfate type salt lake water according to claim 1 salt manufacturing, is characterized in that: in described salt manufacturing bittern, sulfate radical content controls be less than or equal to 8 grams often liter.
3. the method for high sodium sulfate type salt lake water according to claim 1 and 2 salt manufacturing, it is characterized in that: in described crystallisation process, carry out the operation of 2 ~ 5 row's bitterns: namely carry out in crystallizing pond in evaporation and crystal process, when sodium magnesium ratio in bittern is less than 1.2, old halogen is discharged, and the new halogen that reinjects proceeds crystallization.
4. the method for high sodium sulfate type salt lake water according to claim 3 salt manufacturing, is characterized in that: carrying out circulating for 4 to 5 times after new halogen and the old halogen of row, then beach is shone gained crystallization is carried out fishing, stacking.
5. the method for high sodium sulfate type salt lake water according to claim 1 and 2 salt manufacturing, it is characterized in that: in the spring and summer season of Second Year, in conversion pool, the sal glauberi that winter extracts is dissolved in salt lake water again and transforms: first lake water sodium chloride concentration is adjusted to 13 ~ 16 degree Beaume, then winter being dissolved into sodium chloride concentration by freezing produced sal glauberi is in the salt lake water of 13 ~ 16 degree Beaume, concentration is made to reach more than 26 degree Beaume, in conversion pool at temperature 22.8 ~ 36.2 DEG C, sal glauberi is converted into thenardite.
6. the method for high sodium sulfate type salt lake water according to claim 5 salt manufacturing, it is characterized in that: described winter is dissolved into sodium chloride concentration by freezing produced sal glauberi is in the salt lake water of 13 ~ 16 degree Beaume, make concentration reach 26 ~ 32 degree Beaume, then transform in conversion pool.
7. the method for high sodium sulfate type salt lake water according to claim 3 salt manufacturing, it is characterized in that: in the spring and summer season of Second Year, in conversion pool, the sal glauberi that winter extracts is dissolved in salt lake water again and transforms: first lake water sodium chloride concentration is adjusted to 13 ~ 16 degree Beaume, then winter being dissolved into sodium chloride concentration by freezing produced sal glauberi is in the salt lake water of 13 ~ 16 degree Beaume, concentration is made to reach more than 26 degree Beaume, in conversion pool at temperature 22.8 ~ 36.2 DEG C, sal glauberi is converted into thenardite.
8. the method for high sodium sulfate type salt lake water according to claim 7 salt manufacturing, it is characterized in that: described winter is dissolved into sodium chloride concentration by freezing produced sal glauberi is in the salt lake water of 13 ~ 16 degree Beaume, make concentration reach 26 ~ 32 degree Beaume, then transform in conversion pool.
9. the method for high sodium sulfate type salt lake water according to claim 4 salt manufacturing, it is characterized in that: in the spring and summer season of Second Year, in conversion pool, the sal glauberi that winter extracts is dissolved in salt lake water again and transforms: first lake water sodium chloride concentration is adjusted to 13 ~ 16 degree Beaume, then winter being dissolved into sodium chloride concentration by freezing produced sal glauberi is in the salt lake water of 13 ~ 16 degree Beaume, concentration is made to reach more than 26 degree Beaume, in conversion pool at temperature 22.8 ~ 36.2 DEG C, sal glauberi is converted into thenardite.
10. the method for high sodium sulfate type salt lake water according to claim 9 salt manufacturing, it is characterized in that: described winter is dissolved into sodium chloride concentration by freezing produced sal glauberi is in the salt lake water of 13 ~ 16 degree Beaume, make concentration reach 26 ~ 32 degree Beaume, then transform in conversion pool.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410125175.5A CN104944444A (en) | 2014-03-31 | 2014-03-31 | Method for preparing salt from high-sodium-sulfate salt lake water |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105176825A (en) * | 2015-10-13 | 2015-12-23 | 中盐工程技术研究院有限公司 | Method for large-scale production of dunaliella salina by means of sodium sulfate salt lake and salt pan halogen pond |
| CN106830490A (en) * | 2017-03-28 | 2017-06-13 | 精河县精河盐化有限责任公司 | A kind of processing method of the sodium sulfate type salt lake water for the cultivation of salt algae |
| CN111704148A (en) * | 2020-05-27 | 2020-09-25 | 王新磊 | Production method of raw salt |
-
2014
- 2014-03-31 CN CN201410125175.5A patent/CN104944444A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105176825A (en) * | 2015-10-13 | 2015-12-23 | 中盐工程技术研究院有限公司 | Method for large-scale production of dunaliella salina by means of sodium sulfate salt lake and salt pan halogen pond |
| CN106830490A (en) * | 2017-03-28 | 2017-06-13 | 精河县精河盐化有限责任公司 | A kind of processing method of the sodium sulfate type salt lake water for the cultivation of salt algae |
| CN111704148A (en) * | 2020-05-27 | 2020-09-25 | 王新磊 | Production method of raw salt |
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