CN212327457U

CN212327457U - Device for extracting magnesium sulfate heptahydrate based on hot dipping-cold crystallization method

Info

Publication number: CN212327457U
Application number: CN202020580885.8U
Authority: CN
Inventors: 李洪业; 孙九刚
Original assignee: Shandong Yubin New Material Co ltd
Current assignee: Shandong Yubin New Material Co ltd
Priority date: 2020-04-18
Filing date: 2020-04-18
Publication date: 2021-01-12
Anticipated expiration: 2030-04-18

Abstract

The utility model discloses a device for extracting magnesium sulfate heptahydrate based on a hot dipping-cold crystallization method, which comprises a hot dipping tank, a crystallization tank and a centrifugal tank; a stirring device is arranged in the hot dipping tank; a cylindrical baffle is arranged in the crystallizing tank; the upper end of the cylindrical baffle is fixedly connected with the second stirring shaft through a supporting plate; the second stirring shaft is electrically connected with a second motor arranged at the top of the crystallization tank; the outer surface of the cylindrical baffle is provided with a plurality of connecting rods; the end part of the connecting rod is provided with a plurality of hairbrushes which are abutted against the inner wall of the crystallizing tank; the bottom of the crystallization tank is also provided with a third stirring shaft; the end part of the third stirring shaft is provided with a propeller extending into the cylindrical baffle; the other end of the third stirring shaft is electrically connected with a third motor arranged at the bottom of the crystallizing tank. The device can fully mix the raw materials and the leaching solution in the leaching process, thereby improving the leaching effect; the crystal mush is uniformly mixed in the crystallization process, and the problem of wall hanging in the crystallization process can be effectively solved.

Description

Device for extracting magnesium sulfate heptahydrate based on hot dipping-cold crystallization method

Technical Field

The utility model relates to a device of preparation magnesium sulfate heptahydrate, concretely relates to draw device of magnesium sulfate heptahydrate based on hot dipping-cold crystallization method.

Background

Magnesium sulfate, commonly referred to as heptahydrate magnesium sulfate, also known as epsom salt, thiopicrin, bitter salt, magnesioxygen, and malabaric, is an important inorganic chemical raw material and has wide applications in the fields of medicine, food, heavy industry, light industry, agriculture, and the like.

The main method for preparing magnesium sulfate heptahydrate at present comprises the following steps: taking potash magnesium sulphate fertilizer tailings as a raw material; taking a saturated solution of magnesium chloride as a leaching medium, and carrying out methods such as medium-temperature leaching, cooling crystallization and the like; however, in the existing preparation device, because the contact between the materials and the leaching solution is insufficient or the crystal mush is not sufficiently mixed in the cooling and crystallizing process, the wall hanging phenomenon can occur in the crystallizing process, thereby influencing the growth of the crystals and the subsequent solid-liquid separation of the crystals and the mother liquor.

Disclosure of Invention

The utility model discloses the technical problem that will solve is: aiming at the defects in the prior art, the device for extracting the magnesium sulfate heptahydrate based on the hot dipping-cold crystallization method is provided; the device can fully mix the raw materials and the leaching solution in the leaching process, thereby improving the leaching effect; the crystal mush is uniformly mixed in the crystallization process, and the problem of wall hanging in the crystallization process can be effectively solved.

In order to solve the technical problem, the technical scheme of the utility model is that:

a device for extracting magnesium sulfate heptahydrate based on hot dipping-cold crystallization method comprises a hot dipping tank; the crystallizing tank and the centrifugal tank are sequentially communicated with the hot dipping tank; a hot dipping chamber is arranged in the hot dipping tank; a stirring device is arranged in the hot dipping chamber; the stirring device comprises a first motor arranged at the top of the hot dipping chamber, a first stirring shaft connected with an output shaft of the first motor and a plurality of stirring blades arranged on the first stirring shaft; an electric heating sheet is arranged on the inner wall of the hot dipping chamber; a filter chamber is arranged below the hot dipping chamber; the hot dipping chamber and the filtering chamber are separated by a partition; a discharge hole is formed in the partition plate;

a cylindrical baffle is arranged in the crystallizing tank; the upper end of the cylindrical baffle is fixedly connected with the second stirring shaft through a supporting plate; the second stirring shaft is electrically connected with a second motor arranged at the top of the crystallization tank; the outer surface of the cylindrical baffle is provided with a plurality of connecting rods; the end part of the connecting rod is provided with a plurality of hairbrushes which are abutted against the inner wall of the crystallizing tank; the bottom of the crystallization tank is also provided with a third stirring shaft; the end part of the third stirring shaft is provided with a propeller extending into the cylindrical baffle; the other end of the third stirring shaft is electrically connected with a third motor arranged at the bottom of the crystallizing tank; the bottom of the crystallization tank is also provided with a circulating pipe communicated with the bottom of the crystallization tank, and the circulating pipe is provided with a circulating pump and a cooler; a filtrate inlet is formed in the circulating pipe; the filtrate inlet is communicated with a filtrate outlet at the bottom of the hot dipping tank.

As an improved technical scheme, a plurality of brushes which are abutted against the partition plate are arranged on the stirring blade at the bottom of the first stirring shaft.

As a preferable technical scheme, at least one layer of filter screen is arranged in the filter chamber.

As a preferred technical scheme, a feed liquid outlet is formed in the bottom of the crystallizing tank; the feed liquid outlet is communicated with the feed liquid inlet of the centrifugal tank.

As a preferable technical scheme, a centrifugate outlet is arranged on the centrifugal tank; and the centrifugal liquid outlet is communicated with the water inlet of the crystallizing tank.

As a preferred technical scheme, the discharge port, the filtrate outlet, the filtrate inlet, the feed liquid outlet, the centrifugate outlet and the water inlet are all provided with electromagnetic valves.

Since the technical scheme is used, the beneficial effects of the utility model are that:

the utility model discloses draw device of heptahydrate magnesium sulfate based on hot dipping-cold crystallization method is provided with agitating unit in the hot dipping jar, can stir in the hot dipping, improves the raw materials and soaks the mixed degree of consistency of liquid to improve and leach efficiency. The utility model discloses a device for extracting magnesium sulfate heptahydrate based on hot dipping-cold crystallization method, a rotatable cylinder baffle is arranged in the crystallization tank, a plurality of brushes which can be abutted against the inner wall of the crystallization tank are arranged on the outer wall of the cylinder, small granular crystals on the inner wall of the crystallization tank can be scraped off in the rotation process of the cylinder baffle, and the occurrence of the wall hanging phenomenon of the crystallization in the crystallization tank is avoided; the arrangement of the bottom propeller enables the crystal slurry in the crystallizing tank to form internal circulation in the crystallizing tank, improves the contact between small crystals and filtrate, and facilitates the growth of crystal grains.

The utility model discloses draw device of heptahydrate magnesium sulfate based on hot dipping-cold crystallization method, the filtrating after the centrifugation in the centrifuging tank can enter into the crystallizer and reuse, and is provided with the brush on the stirring leaf of lower extreme, can disperse the solid stirring of deposit in the hot dipping tank bottom. The device is convenient to operate, and can effectively improve the leaching efficiency of the magnesium sulfate heptahydrate.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

in the figure, 1. hot dipping tank; 2. a crystallization tank; 3. a centrifuge tank; 4. a hot dipping chamber; 5. a first motor; 6. a first stirring shaft; 7. a stirring blade; 8. an electrical heating sheet; 9. a filtering chamber; 10. a partition plate; 11. a discharge port; 12. a cylindrical baffle plate; 13. a support plate; 14. a second stirring shaft; 15. a second motor; 16. a connecting rod; 17. a brush; 18. a third stirring shaft; 19. a propeller; 20. a third motor; 21. a circulation pump; 22. a cooler; 23. a circulation pipe; 24. a filtrate inlet; 25. a filtrate outlet; 26. filtering with a screen; 27. a feed liquid outlet; 28. a feed liquid inlet; 29. a centrifugate outlet; 30. a water inlet.

Detailed Description

The invention is further explained below with reference to the drawings and examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

As shown in fig. 1, an apparatus for extracting magnesium sulfate heptahydrate based on a hot-dip-cold crystallization method includes a hot-dip tank 1; a crystallization tank 2 and a centrifugal tank 3 which are sequentially communicated with the hot dipping tank 1; a hot dipping chamber 4 is arranged in the hot dipping tank 1; a stirring device is arranged in the hot dipping chamber 4; the stirring device comprises a first motor 5 arranged at the top of the hot dipping chamber 4, a first stirring shaft 6 connected with an output shaft of the first motor 5 and a plurality of stirring blades 7 arranged on the first stirring shaft 6; stirring is carried out discontinuously during hot dipping, so that the raw materials and the leaching solution are fully mixed, and the leaching efficiency is improved. An electric heating sheet 8 is arranged on the inner wall of the hot dipping chamber 4; a filtering chamber 9 is arranged below the hot dipping chamber 4; the hot dipping chamber 4 and the filtering chamber 9 are separated by a partition 10; a discharge hole 11 is formed in the partition plate 10; after leaching, filtering the material to obtain filtrate; magnesium sulfate heptahydrate was obtained by crystallizing the filtrate.

A cylindrical baffle plate 12 is arranged in the crystallization tank 2; the upper end of the cylindrical baffle 12 is fixedly connected with a second stirring shaft 14 through a support plate 13; the second stirring shaft 14 is electrically connected with a second motor 15 arranged at the top of the crystallization tank 2; the outer surface of the cylindrical baffle plate 12 is provided with a plurality of connecting rods 16; the end part of the connecting rod 16 is provided with a plurality of brushes 17 which are abutted against the inner wall of the crystallizing tank 2; the cylinder baffle can rotate under the drive of the second motor, and small-particle crystals on the inner wall of the crystallizing tank can be scraped off in the rotating process of the cylinder baffle, so that the phenomenon of wall hanging of crystallization in the crystallizing tank is avoided. The bottom of the crystallization tank 2 is also provided with a third stirring shaft 18; the end part of the third stirring shaft 18 is provided with a propeller 19 extending into the cylindrical baffle; the other end of the third stirring shaft 18 is electrically connected with a third motor 20 arranged at the bottom of the crystallizing tank; due to the arrangement of the propeller at the bottom of the crystallizing tank, the crystal slurry in the crystallizing tank forms internal circulation in the crystallizing tank, so that the crystal grains are convenient to grow, and the crystallization efficiency of the magnesium sulfate heptahydrate is improved.

The bottom of the crystallization tank is also provided with a circulating pipe 23 communicated with the bottom of the crystallization tank, and the circulating pipe is provided with a circulating pump 21 and a cooler 22; a filtrate inlet 24 is arranged on the circulating pipe; the filtrate inlet communicates with a filtrate outlet 25 at the bottom of the thermodip tank. The filtrate leached by the leaching solution enters a circulating pipe through a filtrate inlet; cooling and crystallizing by a cooler on the circulating pipe under the action of a circulating pump; and (4) putting the prepared crystal slurry into a crystallizing tank for refining.

The utility model discloses be provided with a plurality of and on the stirring vane of the first (mixing) shaft bottom of device based on hot dipping-cold crystallization method draws magnesium sulfate heptahydrate with the brush that the baffle offseted. The solid deposited at the bottom of the hot dipping tank can be stirred and dispersed; at least one layer of filter screen 26 is arranged in the filter chamber. A feed liquid outlet 27 is formed in the bottom of the crystallizing tank; the feed liquid outlet 27 is in communication with the feed liquid inlet 28 of the centrifuge tank. The centrifugal tank is provided with a centrifugal liquid outlet 29; the centrifugate outlet 29 is communicated with the water inlet 30 of the crystallizing tank. Electromagnetic valves (not marked in the figure) are arranged on the discharge port, the filtrate outlet, the filtrate inlet, the feed liquid outlet, the centrifugate outlet and the water inlet; the electromagnetic valves are respectively and electrically connected with controllers (not shown in the figure) arranged on the hot dipping tank, the crystallizing tank and the centrifugal tank; the control is convenient. The device is convenient to operate, and the extraction efficiency of the magnesium sulfate heptahydrate is high.

Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

Claims

1. A device for extracting magnesium sulfate heptahydrate based on a hot dipping-cold crystallization method is characterized by comprising a hot dipping tank; the crystallizing tank and the centrifugal tank are sequentially communicated with the hot dipping tank; a hot dipping chamber is arranged in the hot dipping tank; a stirring device is arranged in the hot dipping chamber; the stirring device comprises a first motor arranged at the top of the hot dipping chamber, a first stirring shaft connected with an output shaft of the first motor and a plurality of stirring blades arranged on the first stirring shaft; an electric heating sheet is arranged on the inner wall of the hot dipping chamber; a filter chamber is arranged below the hot dipping chamber; the hot dipping chamber and the filtering chamber are separated by a partition; a discharge hole is formed in the partition plate;

2. The apparatus for extracting magnesium sulfate heptahydrate based on hot dip-cold crystallization as claimed in claim 1, wherein the stirring blade at the bottom of the first stirring shaft is provided with a plurality of brushes abutting against the partition plate.

3. The apparatus for hot-dip-cold crystallization-based extraction of magnesium sulfate heptahydrate according to claim 1, wherein at least one layer of filter screen is provided in the filtering chamber.

4. The apparatus for extracting magnesium sulfate heptahydrate based on hot dip-cold crystallization as claimed in claim 1, wherein the bottom of the crystallization tank is provided with a feed liquid outlet; the feed liquid outlet is communicated with the feed liquid inlet of the centrifugal tank.

5. The apparatus for extracting magnesium sulfate heptahydrate based on hot-dip-cold crystallization method according to claim 4, wherein the centrifugal tank is provided with a centrifugate outlet; and the centrifugal liquid outlet is communicated with the water inlet of the crystallizing tank.

6. The apparatus for extracting magnesium sulfate heptahydrate based on hot dip-cold crystallization as claimed in claim 5, wherein the outlet, the filtrate inlet, the feed liquid outlet, the centrifugate outlet and the water inlet are all provided with solenoid valves.