CN110563002B - Method for preparing sea salt from 25 Baume-degree concentrated seawater - Google Patents
Method for preparing sea salt from 25 Baume-degree concentrated seawater Download PDFInfo
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- CN110563002B CN110563002B CN201910883523.8A CN201910883523A CN110563002B CN 110563002 B CN110563002 B CN 110563002B CN 201910883523 A CN201910883523 A CN 201910883523A CN 110563002 B CN110563002 B CN 110563002B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
- C01D3/06—Preparation by working up brines; seawater or spent lyes
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Abstract
The invention discloses a method for preparing sea salt from 25 Baume-degree concentrated seawater, which comprises the following steps: the method comprises the following steps of firstly cleaning a salt pond, secondly filling brine into the pond, thirdly, adding brine, fourthly, activating slag, fifthly, collecting salt and reserving slag, sixthly, stacking salt, seventhly, removing mixture, eighthly, changing brine, ninthly, separately drying in the sun, and tenth, when brine in a crystallization pond of an old area reaches 29.5 Baume degrees, removing, and enabling the removed brine to enter a potassium magnesium plant to extract potassium and magnesium; the method for preparing sea salt by using the 25 Baume degree concentrated seawater has the advantages that the 25 Baume degree concentrated seawater is recycled, the method is simple and efficient, and the marine environmental pollution can be effectively prevented; the concentrated seawater is recycled, so that the method has good economic benefit.
Description
Technical Field
The invention relates to a secondary utilization method of 25 Baume degree concentrated seawater, in particular to a method for preparing sea salt from 25 Baume degree concentrated seawater, and belongs to the technical field of secondary utilization of concentrated seawater.
Background
The extraction of bromine from seawater is a technology for extracting elemental bromine from seawater; bromine and its derivatives are important raw materials for pharmaceutical industry and preparation of flame retardants, drilling fluids, etc., and the demand is large; the seawater bromine extraction test and development are started from 1934 abroad, and at present, seawater bromine extraction plants are built in countries and regions such as Japan, France, Argentina, Canada and the like, and the annual output is basically kept at the level of 36 ten thousand tons; seawater bromine extraction from 1966 in China, wherein the seawater bromine extraction technology comprises a steam distillation method, an air blowing method, a solvent extraction method, a precipitation method, an adsorption method and the like, wherein the air blowing method and the steam distillation method are commonly adopted at home and abroad; the basic flow of the air-blown method is acidification → oxidation → blowing → absorption → distillation; the absorption process generally adopts alkali absorption and sulfur monoxide absorption, and the absorbent comprises alkali, sulfur, scrap iron, sodium bromide and the like; in the prior art, most enterprises directly discharge the residual 25 Baume-degree concentrated seawater after extracting bromine from the seawater, so that the pollution to the marine environment is caused, and a large amount of seawater resources are wasted.
Disclosure of Invention
In order to solve the problems, the invention provides a method for preparing sea salt by using 25 Baume degree concentrated seawater, which recycles and reuses the 25 Baume degree concentrated seawater and effectively prevents marine environmental pollution; the concentrated seawater is recycled, so that the method has good economic benefit.
The invention relates to a method for preparing sea salt from 25 Baume-degree concentrated seawater, which comprises the following steps:
firstly, cleaning a salt pond, and cleaning the nitre crust and the floating soil at the bottom of the pond before filling the pond;
secondly, filling brine into a pool, namely filling 25 Baume-degree concentrated seawater into a cleaned salt pool;
and thirdly, adding brine, and adding new saturated brine on the basis of the original brine when the brine depth does not meet the evaporation capacity requirement.
Fourthly, the slag is removed, the salt pond is periodically removed, the removal of the slag is carried out at low temperature in the morning, the general loosening is realized, the bottom of the pond is not damaged, and the slag is not mixed; the walking directions of two adjacent stubble livers are crossed;
fifthly, salt is collected and dregs are left, and salt collection is started when the salt dregs are more than 6 centimeters generally; the dregs are left well after salt collection and are left uniformly;
step six, stacking salt codes, sampling and testing in time after the salt codes are formed, and carrying out thatch seal and preservation;
seventhly, mixing, namely mixing the left slag in the fifth step, performing rushing, violent wound and violent belt in the mixing process, mixing the brine by using a brine cleaning belt, bringing impurities which cannot be contained into a brine discharge port, and discharging the brine out of the tank by using a small amount of brine;
eighthly, changing brine, namely removing brine in the crystallization tank, and then adding new brine;
the ninth step, separate drying, namely determining whether separate drying is carried out on the brine after brine exchange according to meteorological conditions, and obtaining old brine after separate drying;
and step ten, throwing and removing the brine in the crystallization pond of the old area when the brine reaches 29.5 Baume degrees, and feeding the thrown and removed brine into a potassium magnesium plant to extract potassium and magnesium.
Preferably, the halogenation proportion is as follows: determining the depth of the added brine according to the evaporation capacity requirement, namely the evaporation capacity of 1mm, wherein the depth of the brine is required to reach 1.5 cm.
Compared with the prior art, the method for preparing sea salt from the 25 Baume degree concentrated seawater has the advantages that the 25 Baume degree concentrated seawater is recycled, the method is simple and efficient, and the marine environmental pollution can be effectively prevented; the concentrated seawater is recycled, so that the method has good economic benefit.
Drawings
FIG. 1 is a block diagram of the process flow of the present invention.
Detailed Description
Example 1:
the method for preparing sea salt from the seawater with the concentration of 25 Baume degrees as shown in figure 1 specifically comprises the following steps:
firstly, cleaning a salt pond, and cleaning the nitre crust and the floating soil at the bottom of the pond before filling the pond;
secondly, filling brine into a pool, namely filling 25 Baume-degree concentrated seawater into a cleaned salt pool;
and thirdly, adding brine, and adding new saturated brine on the basis of the original brine when the brine depth does not meet the evaporation capacity requirement.
Fourthly, the slag is removed, the salt pond is periodically removed, the removal of the slag is carried out at low temperature in the morning, the general loosening is realized, the bottom of the pond is not damaged, and the slag is not mixed; the walking directions of two adjacent stubble livers are crossed;
fifthly, salt is collected and dregs are left, and salt collection is started when the salt dregs are more than 6 centimeters generally; the dregs are left well after salt collection and are left uniformly;
step six, stacking salt codes, sampling and testing in time after the salt codes are formed, and carrying out thatch seal and preservation;
seventhly, mixing, namely mixing the left slag in the fifth step, performing rushing, violent wound and violent belt in the mixing process, mixing the brine by using a brine cleaning belt, bringing impurities which cannot be contained into a brine discharge port, and discharging the brine out of the tank by using a small amount of brine;
eighthly, changing brine, namely removing brine in the crystallization tank, and then adding new brine;
the ninth step, separate drying, namely determining whether separate drying is carried out on the brine after brine exchange according to meteorological conditions, and obtaining old brine after separate drying;
and step ten, throwing and removing the brine in the crystallization pond of the old area when the brine reaches 29.5 Baume degrees, and feeding the thrown and removed brine into a potassium magnesium plant to extract potassium and magnesium.
Wherein the proportion of the aged brine is as follows: determining the depth of the added brine according to the evaporation capacity requirement, namely the evaporation capacity of 1mm, wherein the depth of the brine is required to reach 1.5 cm.
The above-described embodiments are merely preferred embodiments of the present invention, and all equivalent changes or modifications of the structures, features and principles described in the claims of the present invention are included in the scope of the present invention.
Claims (2)
1. A method for preparing sea salt from concentrated seawater with 25 Baume degrees is characterized by comprising the following steps:
firstly, cleaning a salt pond, and cleaning the nitre crust and the floating soil at the bottom of the pond before filling the pond;
secondly, filling brine into a pool, namely filling 25 Baume saturated brine into a cleaned salt pool;
thirdly, adding brine, and adding new saturated brine on the basis of the original brine when the brine depth does not meet the evaporation capacity requirement;
fourthly, the slag is removed, the salt pond is periodically removed, the removal of the slag is carried out at low temperature in the morning, the general loosening is realized, the bottom of the pond is not damaged, and the slag is not mixed; the walking directions of two adjacent stubble livers are crossed;
fifthly, salt is collected and dregs are left, and salt collection is started when the salt dregs are more than 6 centimeters generally; the dregs are left well after salt collection and are left uniformly;
step six, stacking salt codes, sampling and testing in time after the salt codes are formed, and carrying out thatch seal and preservation;
seventhly, mixing, namely mixing the left slag in the fifth step, performing rushing, violent wound and violent belt in the mixing process, mixing the brine by using a brine cleaning belt, bringing impurities which cannot be contained into a brine discharge port, and discharging the brine out of the tank by using a small amount of brine;
eighthly, changing brine, namely removing brine in the crystallization tank, and then adding new brine;
the ninth step, separate drying, namely determining whether separate drying is carried out on the brine after brine exchange according to meteorological conditions, and obtaining old brine after separate drying;
and step ten, throwing and removing the brine in the crystallization pond of the old area when the brine reaches 29.5 Baume degrees, and feeding the thrown and removed brine into a potassium magnesium plant to extract potassium and magnesium.
2. The method for producing sea salt from seawater of 25 baume degree as claimed in claim 1, wherein: the third step comprises the following halogen adding amount: determining the depth of the added brine according to the evaporation capacity requirement, namely the evaporation capacity of 1mm, wherein the depth of the brine is required to reach 1.5 cm.
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| CN201910883523.8A CN110563002B (en) | 2019-09-18 | 2019-09-18 | Method for preparing sea salt from 25 Baume-degree concentrated seawater |
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| CN201910883523.8A CN110563002B (en) | 2019-09-18 | 2019-09-18 | Method for preparing sea salt from 25 Baume-degree concentrated seawater |
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| CN110563002A CN110563002A (en) | 2019-12-13 |
| CN110563002B true CN110563002B (en) | 2021-12-31 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935057A (en) * | 2009-06-30 | 2011-01-05 | 天津长芦海晶集团有限公司 | Industrial salt solarization harvesting process |
| CN102424402A (en) * | 2011-09-05 | 2012-04-25 | 莱州诚源盐化有限公司 | Method for collecting salt by bittern-exchange washing |
| CN102838133A (en) * | 2012-07-28 | 2012-12-26 | 响水县天地盐业科技服务有限公司 | Salt-manufacturing method from bittern in solar greenhouse |
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2019
- 2019-09-18 CN CN201910883523.8A patent/CN110563002B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935057A (en) * | 2009-06-30 | 2011-01-05 | 天津长芦海晶集团有限公司 | Industrial salt solarization harvesting process |
| CN102424402A (en) * | 2011-09-05 | 2012-04-25 | 莱州诚源盐化有限公司 | Method for collecting salt by bittern-exchange washing |
| CN102838133A (en) * | 2012-07-28 | 2012-12-26 | 响水县天地盐业科技服务有限公司 | Salt-manufacturing method from bittern in solar greenhouse |
Non-Patent Citations (3)
| Title |
|---|
| 原盐生产工艺标准;tyxzzw109;《百度文库》;20120805;第1-23页 * |
| 浅谈湖盐深水结晶和机械化采收;马润民;《海湖盐与化工》;20031231;第32-33页 * |
| 浅谈特殊气象条件对原盐产量影响及措施;王绪书;《盐业与化工》;20160228;第35-36页 * |
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Address after: 256600 Gaotian, Mashanzi Town, Beihai New Area, Binzhou City, Shandong Province Patentee after: Jinsheng Marine Technology Co.,Ltd. Address before: 256600 Gaotian, Mashanzi Town, Beihai New Area, Binzhou City, Shandong Province Patentee before: Jinsheng Ocean Technology Co.,Ltd. |
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Address after: 256600 Huitai Blue Industrial Park, Beihai Economic Development Zone, Binzhou, Shandong Patentee after: Jinsheng Marine Technology Co.,Ltd. Address before: 256600 Gaotian, Mashanzi Town, Beihai New Area, Binzhou City, Shandong Province Patentee before: Jinsheng Marine Technology Co.,Ltd. |