CN211896061U - Salt water refining device - Google Patents

Abstract

The utility model discloses a brine refining device, which comprises a salt dissolving barrel, a causticizing liquid tank, a reaction tank, a clarifying barrel and a mud washing barrel; the salt dissolving barrel, the reaction tank and the clarifying barrel are sequentially connected, the clarifying barrel is sequentially connected with the mud washing barrel and the salt dissolving barrel, and the causticizing liquid tank is respectively connected with the reaction tank and the mud washing barrel to provide causticizing liquid. The utility model provides a brine refining device provides causticization liquid to the mud washing bucket through causticization fluid reservoir, and the mud washing bucket will after detaching the causticization mud in the causticization liquid provides extremely the salt washing bucket, this part causticization liquid is in advance in the source part calcium magnesium impurity in the crude brine is detached, has reduced the addition of subsequent refining in-process causticization liquid.

Description

Salt water refining device

Technical Field

The utility model relates to a soda production technical field especially relates to a salt solution refining plant.

Background

Soda ash, also known as soda or soda ash. It is an important organic chemical raw material, mainly used for producing plate glass, glass products and ceramic glaze, and also widely used for domestic washing, acid neutralization, food processing and the like. When producing the soda ash, the raw salt is prepared into crude brine in a salt dissolving barrel, the crude brine often contains impurities such as calcium salt, magnesium salt and the like, when the subsequent brine is treated for producing the soda, the calcium and magnesium impurities can generate precipitate or double salt, so that not only can equipment and pipelines be easily scaled and even blocked, but also the service cycle of the equipment is shortened, and the loss of refined salt can be caused, therefore, the crude brine needs to be refined by the important process of brine refining to remove the calcium and magnesium impurities, and the refining effect of the crude brine directly influences the quality of soda ash products.

The content of calcium and magnesium in the crude brine fluctuates, if the content of calcium and magnesium exceeds the control index range, the quality of refined salt is affected, the crude brine is usually conveyed to a reaction tank, and causticizing liquid is added to remove calcium and magnesium, but a large amount of causticizing liquid can also cause the reduction of salt in the refined brine while removing calcium and magnesium, so that the production is affected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a salt solution refining plant to lead to the problem that salinity descends in the refined salt solution when solving among the prior art causticization liquid decalcification magnesium.

In order to achieve the above object, the present invention provides the following technical solutions: a brine refining device comprises a salt dissolving barrel for dissolving raw salt into crude brine, a causticizing liquid tank for preparing causticizing liquid, a reaction tank, a clarifying barrel and a mud washing barrel; the salt dissolving barrel, the reaction tank and the clarifying barrel are sequentially connected, the clarifying barrel is sequentially connected with the mud washing barrel and the salt dissolving barrel, and the causticizing liquid tank is respectively connected with the reaction tank and the mud washing barrel to provide causticizing liquid; the raw salt is converted into crude salt water through the salt conversion barrel, the crude salt water and the causticizing liquid react in the reaction tank to form a suspension, and the suspension is clarified through the clarifying barrel to form refined salt water and salt mud; and the causticized liquid enters the salt dissolving barrel through the mud washing barrel to remove calcium salt and/or magnesium salt in the crude brine.

Further, the salt mud is washed by the mud washing barrel to form clear liquid, and the clear liquid is returned to the salt dissolving barrel.

Further, the brine refining device also comprises a water impurity tank arranged between the mud washing barrel and the salt dissolving barrel.

Further, the causticizing liquid is a mixture of lime milk and soda ash solution.

Compared with the prior art, the utility model provides a salt solution refining device has following advantage:

the utility model provides a brine refining device provides causticization liquid to the mud washing bucket through causticization fluid reservoir, and the mud washing bucket will after detaching the causticization mud in the causticization liquid provides extremely the salt washing bucket, this part causticization liquid is in advance in the source part calcium magnesium impurity in the crude brine is detached, has reduced the add quantity of subsequent refined in-process causticization liquid, has improved the salinity in the refined brine, guarantees production.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. In the drawings:

fig. 1 is a schematic structural diagram of a brine refining device according to a preferred embodiment of the present invention.

Reference numerals:

1-salt dissolving barrel, 2-causticizing liquid tank,

3-a reaction tank, 4-a clarifying barrel,

5-a mud washing barrel and 6-a miscellaneous water tank.

Detailed Description

The present invention provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific examples described in the following embodiments of the present invention are merely illustrative of specific embodiments of the present invention and do not constitute limitations on the scope of the invention.

The invention is further described with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, fig. 1 is a schematic structural diagram of a brine refining device according to a preferred embodiment of the present invention.

The embodiment is a brine refining device, which comprises a salt dissolving barrel 1 for dissolving raw salt into crude brine, a causticizing liquid tank 2 for preparing causticizing liquid, a reaction tank 3, a clarifying barrel 4 and a mud washing barrel 5;

the salt dissolving barrel 1, the reaction tank 3 and the clarifying barrel 4 are sequentially connected, the clarifying barrel 4 is sequentially connected with the mud washing barrel 5 and the salt dissolving barrel 1, and the causticizing liquid tank 2 is respectively connected with the reaction tank 3 and the mud washing barrel 5 to provide causticizing liquid;

the raw salt is converted into crude salt water through the salt conversion barrel 1, the crude salt water and the causticizing liquid react in the reaction tank 3 to form a suspension, and the suspension is clarified through the clarifying barrel 4 to form refined salt water and salt slurry; the causticized liquid enters the salt dissolving barrel 1 through the mud washing barrel 5 to remove calcium salt and/or magnesium salt in the crude brine.

The utility model provides a brine refining device passes through causticization fluid reservoir 2 to wash mud bucket 5 provides causticization liquid, wash mud bucket 5 will after detaching the causticization mud in the causticization liquid provides extremely the causticization salt bucket 1, this part causticization liquid will in advance at the source partly calcium magnesium impurity in the crude brine is detached, has reduced the add amount of causticization liquid in the follow-up refining process, has improved the salinity in the refined brine, guarantees production.

The salt dissolving barrel 1 is used for dissolving raw salt into crude salt water, the raw salt enters from the upper part of the salt dissolving barrel 1 and is in countercurrent contact with the mixed water entering from the bottom of the salt dissolving barrel to form saturated crude salt water, the saturated crude salt water overflows out of the salt dissolving barrel 1, the main component of the saturated crude salt water is sodium chloride, and impurities such as magnesium chloride and calcium chloride are also contained.

The causticizing liquid tank 2 is used for preparing causticizing liquid, and the calcium and magnesium impurities in the crude brine are removed by the causticizing liquid. Further, the causticizing liquid is a mixture of lime milk and soda ash solution. The preparation and the use amount of the causticizing liquid are determined according to the flow rate of the crude brine and the content of calcium and magnesium impurities.

Lime milk is commonly called hydrated lime or slaked lime, white solid, slightly soluble in water, and its aqueous solution is often called lime water, and is generally produced by adding water to calcium oxide, and its main component is calcium hydroxide. The soda solution is sodium carbonate solution.

The reaction tank 3 is a place where brine is refined, and the crude brine and the causticizing liquid are mixed, stirred, and fully reacted in the reaction tank 3 to form a suspension.

The reaction principle is as follows: reacting magnesium ions in the crude brine into magnesium hydroxide precipitate by using lime milk and removing the magnesium hydroxide precipitate; calcium ions in the crude brine are reacted by using a soda ash solution to precipitate calcium carbonate and then removed.

The clarifying tank 4 is used for clarifying the suspension to form fine brine and salt sludge.

Further, the salt mud is washed by the mud washing barrel 5 to form clear liquid, and the clear liquid is returned to the salt dissolving barrel 1. The salt mud is washed by the mud washing barrel 5 to form clear liquid and simultaneously generate waste mud, and the waste mud is discharged to a waste mud groove.

The mud washing barrel 5 is used for washing the salt mud, the salt mud and washing water are subjected to multi-layer countercurrent washing in the mud washing barrel 5 to form the clear liquid and the waste mud, and the clear liquid flows out of the mud washing barrel 5 and returns to the salt dissolving barrel 1 to be continuously dissolved with salt.

The causticizing liquid tank 2 simultaneously provides causticizing liquid for the mud washing barrel 5, the mud washing barrel 5 can remove silt or impurities contained in the causticizing liquid in advance, when the causticizing liquid is provided for the salt dissolving barrel 1, the precipitation amount or the silt amount in the salt dissolving barrel 1 is reduced, meanwhile, calcium salt or magnesium salt in crude brine in the salt dissolving barrel 1 is removed in advance by the causticizing liquid, the adding amount of the causticizing liquid in the subsequent refining process is reduced, the salinity in refined brine is improved, and the production is ensured.

Further, the brine refining device further comprises a mixed water tank 6 arranged between the mud washing barrel 5 and the salt dissolving barrel 1, wherein the mixed water tank 6 is used for storing the clear liquid for buffering.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim.

Claims (3)

1. The brine refining device is characterized by comprising a salt refining barrel (1) for refining raw salt into crude brine, a causticizing liquid tank (2) for preparing causticizing liquid, a reaction tank (3), a clarifying barrel (4) and a mud washing barrel (5);

the salt dissolving barrel (1), the reaction tank (3) and the clarifying barrel (4) are sequentially connected, the clarifying barrel (4) is sequentially connected with the mud washing barrel (5) and the salt dissolving barrel (1), and the causticizing liquid tank (2) is respectively connected with the reaction tank (3) and the mud washing barrel (5) to provide causticizing liquid;

the raw salt is converted into crude salt water through the salt dissolving barrel (1), the crude salt water and the causticizing liquid react in the reaction tank (3) to form a suspension, and the suspension is clarified through the clarifying barrel (4) to form refined salt water and salt mud; the causticized liquid enters the salt dissolving barrel (1) through the mud washing barrel (5) to remove calcium salt and/or magnesium salt in the crude brine.

2. A brine refining plant as defined in claim 1, characterized in that said salt slurry is washed by said wash tank (5) to form a clear liquid, said clear liquid being returned to said salt melting tank (1).

3. A brine refining plant according to claim 1, characterized in that it further comprises a miscellaneous water tank (6) arranged between the mud washing tank (5) and the salt dissolving tank (1).

Images