CN203985940U

CN203985940U - Industry law seawater is produced the process equipment of edible salt

Info

Publication number: CN203985940U
Application number: CN201420329983.9U
Authority: CN
Inventors: 陈黎明
Original assignee: Hangzhou Fang Sheng Light Industry And Machinery Manufacturing Co Ltd
Current assignee: Hangzhou Fang Sheng Light Industry And Machinery Manufacturing Co Ltd
Priority date: 2014-06-18
Filing date: 2014-06-18
Publication date: 2014-12-10
Anticipated expiration: 2024-06-18

Abstract

The utility model discloses industry law seawater and produce the process equipment of edible salt, it comprises pretreatment unit, counter-infiltration unit, preheater, mechanical steam recompression evaporation equipment, the post-processing unit arranging in order; Described pretreatment unit comprises: the sedimentation basin that seawater is carried out to quiescent setting processing; For the mechanical filter that seawater that sedimentation basin is exported is filtered; For the ultraviolet sterilizer that seawater that sedimentation basin is exported is carried out to sterilization; The seawater of described pretreatment unit output is connected to counter-infiltration unit and processes; Receive the preheater through counter-infiltration unit reason seawater of living in; Receive the mechanical steam recompression evaporation equipment through preheater institute the pre-heat treatment seawater.This equipment has been saved a large amount of soils, and is not subject to seasonal effect, and small investment is saved manpower.It is all clean energy resource " electric energy " that equipment moves the required energy, and automaticity is high, and uninterrupted production continuously in 24 hours, without steam, is really accomplished zero-emission zero pollution.

Description

Processing equipment for producing edible salt by industrial method seawater

Technical Field

The utility model relates to the field of salt industry production, in particular to a processing device for producing edible salt by industrial seawater.

Background

At present, the salt preparation from seawater is basically a solar evaporation method, is an old salt preparation method, and is a common method still used at present. The method is to build a plurality of ponds like rice fields at the bank for drying salt in the sun. The salt making process includes the steps of moisture absorption, brine making, crystallization, salt collection, storage, transportation and the like.

Moisture collection: seawater with high salt content is introduced into the salt field by utilizing seawater flood tide.

Preparing brine: the method is a long process, and the water is evaporated to reach a saturated solution by blowing and drying in the sun, which is commonly called brine.

And (3) crystallization: the brine is continuously evaporated in the crystallization tank, and the salt is gradually deposited at the bottom of the tank to form crystals.

Salt collection: the salt crystals in the crystallization tank can be collected when reaching a certain degree.

Salt production in salt fields is greatly influenced by the environment, and the salt yield can be directly influenced by factors such as salinity, geographical position, rainfall, evaporation capacity and the like of seawater. The method occupies large land and manpower resources, the purity of the salt is low, the impurities are more, the crystallized brine is discharged back to the sea, and certain influence is caused on the marine environment, and improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provide a processing device for producing edible salt by seawater in an industrial method.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the industrial process of producing edible salt with sea water includes the following steps:

extracting seawater: conveying the seawater to a sedimentation tank for sedimentation through a conveying pipeline by using a water pump;

pretreatment: filtering the seawater precipitated in the sedimentation tank by using a filtering device to remove suspended matters and microorganisms in the seawater;

concentration: concentrating the filtered seawater by using a seawater desalination membrane reverse osmosis method;

preheating: preheating the material entering the evaporator by utilizing the heat energy of condensed water of a heater on the evaporator;

concentration and crystallization: by utilizing a mechanical vapor recompression technology, secondary vapor generated by an evaporator is utilized by a mechanical recompression method, and crude salt is obtained at the same time.

The processing equipment for producing edible salt by seawater by an industrial method comprises a pretreatment unit, a reverse osmosis unit, a preheater, mechanical steam recompression evaporation equipment and a post-treatment unit which are arranged in sequence;

wherein,

the preprocessing unit includes:

a sedimentation tank for carrying out static sedimentation treatment on the seawater;

the mechanical filter is used for filtering the seawater output by the sedimentation tank;

the ultraviolet sterilizer is used for sterilizing the seawater output by the sedimentation tank;

the seawater output by the pretreatment unit is connected with a reverse osmosis unit for treatment;

a preheater for receiving seawater processed by the reverse osmosis unit;

mechanical steam recompression evaporation equipment for receiving seawater preheated by the preheater;

the preheater is connected to the condensed water output pipeline of the heating chamber of the evaporator and selects a plate heat exchanger.

The processing equipment further comprises:

the flow pump I is arranged at the output end of the sedimentation tank;

the singlechip controller is electrically connected with the flow pump I;

and a flow pump II is arranged on a condensate water output pipeline of the preheater and is electrically connected with the singlechip controller.

The sedimentation tank is provided with a solar cell panel which is electrically connected with a storage battery, and the storage battery is electrically connected with the ultraviolet sterilizer, the flow pump I, the flow pump II and the single chip microcomputer controller.

The utility model discloses following beneficial effect has:

(1) the process is the most advanced energy-saving and environment-friendly method for preparing salt from seawater at present, saves a large amount of land compared with a salt field method, is not influenced by seasons, and is low in investment and labor-saving. For example, 5 ten thousand tons of salt is produced annually, the land occupation of the salt field method is about 2500 mu, and the land occupation of the method is only 50 mu. The only personnel required are 1/10 of the salt pan method, the basic investment for producing each ton of salt is 1/5 of the salt pan method, and the purity and the concentration of the brine are higher than those of the salt pan method. The crystallized bittern can be used for extracting important chemical raw materials such as calcium sulfate, magnesium sulfate, potassium chloride, calcium chloride, bromine water and the like, energy required by equipment operation is clean energy 'electric energy', the automation degree is high, continuous production is carried out continuously for 24 hours, steam is not needed, and zero emission and zero pollution are really achieved.

(2) The method can produce a large amount of fresh water and distilled water in the production process, so the project is particularly suitable for coastal and water-deficient island areas, and can produce salt and solve the problem of water consumption of islands.

(3) The crystallized brine can be used for extracting important chemical raw materials such as calcium sulfate, magnesium sulfate, potassium chloride, calcium chloride, bromine water and the like.

Drawings

FIG. 1 is a process flow chart of edible salt production by industrial seawater.

FIG. 2 is a process flow diagram for preparing refined salt from crude salt.

FIG. 3 is a schematic view of a processing apparatus for producing edible salt from seawater by an industrial method.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

As shown in figure 1, the industrial process for producing edible salt by seawater comprises a seawater extraction step, a precipitation step, a filtration step, a concentration step, a preheating step and an evaporation and crystallization step.

Extracting seawater: the seawater is delivered to the sedimentation tank for sedimentation through the delivery pipeline by the water pump, so that the salt making processing process is not affected by tide, and impurities such as silt in the seawater are clarified in the sedimentation tank.

Pretreatment: the seawater precipitated by the sedimentation tank is filtered by using a filtering device to remove suspended matters and microorganisms in the seawater so as to facilitate the seawater to reach the preset purity.

Concentration: the filtered seawater is concentrated by utilizing a seawater desalination membrane reverse osmosis method, wherein the seawater desalination membrane reverse osmosis method is a seawater desalination principle, partial water is removed, and the seawater concentration is improved.

Preheating: the material entering the evaporator is preheated by utilizing the heat energy of the condensed water of the heater on the evaporator, so that the waste heat can be fully utilized, and the temperature of the material is increased.

The process is the most advanced energy-saving and environment-friendly method for preparing salt from seawater at present, saves a large amount of land compared with a salt field method, is not influenced by seasons, and is low in investment and labor-saving. For example, 5 ten thousand tons of salt is produced annually, the land occupation of the salt field method is about 2500 mu, and the land occupation of the method is only 50 mu. The only personnel required are 1/10 of the salt pan method, the basic investment for producing each ton of salt is 1/5 of the salt pan method, and the purity and the concentration of the brine are higher than those of the salt pan method. The crystallized bittern can be used for extracting important chemical raw materials such as calcium sulfate, magnesium sulfate, potassium chloride, calcium chloride, bromine water and the like, energy required by equipment operation is clean energy 'electric energy', the automation degree is high, continuous production is carried out continuously for 24 hours, steam is not needed, and zero emission and zero pollution are really achieved.

The method can produce a large amount of fresh water and distilled water in the production process, so the project is particularly suitable for coastal and water-deficient island areas, and can produce salt and solve the problem of water consumption of islands.

The crystallized brine can be used for extracting important chemical raw materials such as calcium sulfate, magnesium sulfate, potassium chloride, calcium chloride, bromine water and the like.

Referring to fig. 2, refined salt can produce various salts according to different processes and by adding different trace elements, and at present, the following salts are common:

1. refined salt

Crude salt is used as raw material, brine purification, vacuum evaporation, dehydration, drying and other processes are adopted, the color is pure white and powdery, the content of sodium chloride is more than 99.6%, and the seasoning is suitable for cooking.

2. Low sodium salt

In common salt, the sodium content is high, the potassium content is low, and the imbalance of dietary sodium and potassium is easy to cause, so that the occurrence of hypertension is caused. The low sodium salt has reasonable ratio of sodium to potassium, can reduce cholesterol in blood, and is suitable for patients with hypertension and cardiovascular diseases.

3. Iodized salt

Adding iodide and stabilizing salt in certain proportion. In order to prevent and treat iodine deficiency, a certain dosage of potassium iodide and potassium iodate is added into common salt. The most scientific, most direct, most effective, most simple and most economical iodine supplementation method for preventing and treating iodine deficiency. Is developed for supplementing iodine for residents in iodine-deficient areas, and can be used for preventing and treating endemic goiter and cretinism. The edible iodized salt is prepared from the following salt iodized concentrations in iodine deficiency disease regions specified in China: 1/50000-1/20000; the United nations world health organization recommends 1/100000 concentrations of iodized salt to the ward; the iodine content of the Federa Germany iodine salt is 1/250000, and the Federa Germany iodine salt is the country with the lowest concentration of iodine salt in the world; the concentration of iodine salt in the United states is 1/10000, and the country with the highest concentration of iodine salt in the world is.

4. Selenium-added salt

Selenium is the "anticancer king" of trace elements in human body. The selenium-added salt is prepared by adding a certain amount of sodium selenite on the basis of iodine salt. Selenium is also a necessary trace element for human bodies, has important functions of resisting oxidation, delaying cell aging, protecting cardiovascular health, improving human immunity and the like, and is an antidote for harmful heavy metals in the bodies. Animal liver, kidney and marine products are good sources of selenium, while the selenium content of plant foods is greatly influenced by the selenium content in the production area and water and soil. Selenium salt can be optionally added for middle aged and elderly people, patients with cardiovascular diseases, and people with small meal. Adding salt containing selenide in a certain proportion. Has certain curative effect on preventing keshan disease and Kaschin-Beck disease. Selenium-enriched salt produced in China contains sodium selenite 15/1000000.

5. Adding zinc salt

It is prepared by mixing zinc gluconate and refined salt, and can be used for treating growth retardation, short stature, intelligence deterioration, anorexia, and aging of children due to zinc deficiency. Zinc is the "flower of life". The zinc salt is prepared by taking iodized salt as a raw material and adding a certain amount of zinc sulfate or zinc gluconate according to the national standard, is beneficial to the brain strengthening of children, the memory improvement and the body development, and has good effect on preventing various diseases caused by zinc deficiency. Zinc is a trace element essential to human body, plays an important role in growth and development, cell regeneration, and maintenance of normal taste and appetite of human body, and can also promote normal development of sexual organs, promote skin health, and enhance immune function. Zinc is mainly present in meat and viscera of animals, and the zinc content in food such as nuts and soybeans is also rich, while the zinc content in vegetables, fruits and polished rice flour is low. It is generally advocated to ingest a balanced diet, relying on natural foods to supplement the zinc. However, there is a possibility that the zinc content in the body is deficient in children who grow rapidly, women in pregnancy, the elderly who have a small food intake, vegetarians and the like. The zinc salt can be added for the people to eat.

6. Blood-enriching salt

Namely the addition of iron salts. Table salt with iron content up to about 8000 ppm. It is usually obtained by adding a proper amount of iron enhancer such as ferrous sulfate to salt. Adding iron salt for patients with iron deficiency anemia. Is prepared from iron reinforcer and refined salt. Iron deficiency anemia, iodine deficiency and vitamin A deficiency are listed as three major micronutrient malnutrition diseases which are mainly prevented, treated and eliminated in limited time by international organizations such as world health organization, foundation of union countries and the like. The iron deficiency anemia in China has high morbidity, and the reinforced ferric salt added with a certain amount of iron-containing compounds can be used for preventing the iron deficiency anemia caused by iron deficiency of human bodies, improving the learning attention, memory and immunity of human bodies of children, is suitable for iron deficiency people, and particularly can meet the requirements of infants, teenagers, women and old people on iron. The main components of the ferric salt are as follows: the iron content is 600-1000 mg/kg, and the iodine content is not less than 40 mg/kg.

7. Adding calcium salt

The results of 3 times of national nutrition census in China show that people generally have about half of calcium deficiency in diet, and children, pregnant women and old people have more serious calcium deficiency. The calcium salt is prepared by adding calcium compound based on common iodized salt in proportion, is suitable for various people needing calcium supplement, and can prevent osteoporosis and arteriosclerosis, regulate balance of other mineral substances, activate enzyme, etc. The calcium salt comprises the following main components: the calcium content is 6000-10000 mg/kg, and the iodine content is not less than 40 mg/kg.

8. Anticarious salt

Adding a fluorine compound such as sodium fluoride to salt to make the fluorine element reach 100-250 ppm. Is suitable for low fluorine area and has certain curative effect on dental caries. Is suitable for children and teenagers.

9. Vitamin B2 salt

In the refined salt, a certain amount of vitamin B2 (riboflavin) is added, and the color and the taste are orange yellow and the taste is the same as that of the common salt. Can be used for preventing and treating vitamin B2 deficiency. People who often suffer from oral ulcers may lack vitamin B2 in their body, which can be ameliorated by eating a riboflavin salt (vitamin B2 salt). The riboflavin in the riboflavin salt has important significance for human energy metabolic process and can promote growth and development. Vitamin B2 is mainly present in animal food, and may be deficient if eaten regularly. Vitamin B2 is yellow and easily soluble in water, and if excessive amount of vitamin B enters human body, it will be discharged from urine, and there is no problem of intoxication due to hyperphagia.

10. Flavor salt

Sesame, chili, spiced powder, shrimp powder, pricklyash peel powder, etc. are added into the refined salt to make into spiced salt, spicy salt, sesame salt, shrimp salt, etc. for stimulating appetite.

11. Nutrient salt

The salt is a salt variety newly developed in recent years, is prepared by mixing a certain amount of bryophyte juice in refined salt, evaporating, dehydrating and drying, has the functions of preventing ulcer and preventing and treating thyromegaly, and contains various amino acids and vitamins.

12. Natural crystal salt

The natural crystal salt is prepared from sea salt as raw material, maintains the composition nearest to human body in sea, especially maintains inorganic salts and marine life elements rich in potassium, sodium, magnesium, iodine, etc., and the granules are in crystal form, thus being more suitable for people in coastal areas to eat. The Guangdong is one of two provinces which are approved to produce natural crystal salt in China by national approval, and is popular with consumers when trial sale is carried out in partial coastal areas in the early years.

13. Snowflake salt

The high-quality sea salt is used as a raw material and is processed by the most advanced special technology in the world at present, the salt has the characteristics of natural purity, looseness, instant dissolution and the like, is white in color, contains various minerals and nutrients necessary for a human body, and is the highest-grade variety in common iodine salt. At present, snowflake salt is popular in developed countries such as the united states, canada, japan, korea, australia, and the like.

Referring to fig. 3, the processing equipment for producing edible salt by industrial seawater comprises a pretreatment unit, a reverse osmosis unit, a preheater, a mechanical vapor recompression evaporation device and a post-treatment unit which are arranged in sequence.

The seawater contains more impurities, mainly algae, silt and harmful bacteria, so the seawater needs to be treated by sterilization, algae removal and turbidity reduction, and in view of the above, a pretreatment unit is required to be utilized for treatment, and the pretreatment unit at least comprises: the device comprises a sedimentation tank for carrying out static sedimentation treatment on seawater, a mechanical filter for filtering the seawater output by the sedimentation tank and an ultraviolet sterilizer for sterilizing the seawater output by the sedimentation tank.

The seawater output by the pretreatment unit is connected with a reverse osmosis unit for treatment, the salinity of the seawater is generally 3-3.5%, if the seawater directly enters evaporation equipment, the energy consumption is large, partial water can be removed by using a reverse osmosis technology, and the concentration of the seawater can be improved to about 6% by using secondary reverse osmosis, so that the aim of saving energy is fulfilled.

The seawater pre-heater receives seawater treated by the reverse osmosis unit, heats the seawater treated by the reverse osmosis unit to an evaporation temperature, utilizes the waste heat of condensed water in a heating chamber of the evaporator, improves the temperature of the seawater through the plate heat exchanger, and fully recovers the heat in the condensed water.

Mechanical steam recompression evaporation equipment for receiving seawater preheated by a preheater. It is used as high-efficiency energy-saving evaporation equipment, and adopts low-temperature and low-pressure steam technology and clean energy-electric energy to produce steam and separate out the water content in the medium.

The processing equipment further comprises: the flow pump I is arranged at the output end of the sedimentation tank; the singlechip controller is electrically connected with the flow pump I; and a flow pump II is arranged on a condensate water output pipeline of the preheater and is electrically connected with the singlechip controller. The flow is input through intelligent control processing equipment.

The sedimentation tank is provided with a solar cell panel which is electrically connected with a storage battery, and the storage battery is electrically connected with the ultraviolet sterilizer, the flow pump I, the flow pump II and the single chip microcomputer controller. The space of the sedimentation tank is utilized to the maximum extent. And for system electric equipment, the design can avoid the effective continuous operation when municipal power supply goes wrong.

The post-treatment unit is a device for producing refined salt, and at least comprises a salt washing machine, a dehydrator, a fluidized bed dryer, a crusher, a packaging machine and a conveying device.

Above only do the preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above embodiment, all belong to the technical scheme of the present invention all belong to the protection scope of the present invention. For those skilled in the art, several modifications can be made without departing from the principle of the present invention, and such modifications should also be considered as the protection scope of the present invention.

Claims

1. The processing equipment for producing edible salt by seawater by an industrial method is characterized by comprising a pretreatment unit, a reverse osmosis unit, a preheater, mechanical steam recompression evaporation equipment and a post-treatment unit which are arranged in sequence;

wherein,

the preprocessing unit includes:

a preheater for receiving seawater processed by the reverse osmosis unit;

2. The processing facility for industrial seawater production of edible salt as claimed in claim 1, further comprising:

the flow pump I is arranged at the output end of the sedimentation tank;

the singlechip controller is electrically connected with the flow pump I;

3. The processing equipment for producing edible salt by industrial seawater according to claim 1 or 2, wherein the settling tank is provided with a solar cell panel which is electrically connected to a storage battery, and the storage battery is electrically connected to the ultraviolet sterilizer, the flow pump I, the flow pump II and the singlechip controller.