CN215429030U

CN215429030U - High-efficient preparation facilities of magnesium hydrate

Info

Publication number: CN215429030U
Application number: CN202121722673.XU
Authority: CN
Inventors: 王庆志; 祝林; 郭延栋
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-01-07
Anticipated expiration: 2031-07-27

Abstract

The utility model belongs to the technical field of magnesium hydroxide preparation, and particularly relates to an efficient preparation device for magnesium hydroxide. The technology comprises a first-stage reaction container and a placing bracket, wherein the first-stage reaction container is arranged on the placing bracket; the first-stage reaction vessel is provided with a first feeding hole, a stirring device and a discharging pipe; a valve is arranged on the discharge pipe, a primary filter screen is arranged below the primary reaction container, and a liquid separation box is arranged below the primary filter screen; a secondary reaction vessel is arranged on the placing bracket on the right side of the primary reaction vessel; the left side of the secondary reaction container is communicated with the liquid separation box through a communicating pipe, and a pump is arranged on the communicating pipe; a second feeding hole and a discharging pipe for adding the sodium hydroxide solution are arranged on the second-stage reaction container; and a discharge end of a discharge pipe of the second-stage reaction container is provided with a second-stage filter screen. The design ensures that the produced magnesium hydroxide solid does not contain calcium ions and silt impurities, improves the production efficiency and saves the production cost.

Description

High-efficient preparation facilities of magnesium hydrate

Technical Field

The utility model belongs to the technical field of magnesium hydroxide preparation, and particularly relates to an efficient preparation device for magnesium hydroxide.

Background

The magnesium hydroxide can be used as a flame retardant for plastic and rubber products, a flue gas desulfurizer and a neutralizer for treating acid-containing wastewater, and the use value of the magnesium hydroxide is higher and higher.

The traditional preparation method of magnesium hydroxide takes magnesium oxide as a production raw material, but the cost of the magnesium oxide is higher, so cheaper magnesium chloride hexahydrate is adopted as the production raw material; however, the magnesium chloride hexahydrate crystal is not pure, and contains impurities such as silt, calcium ions and the like, so that the impurity removal is particularly important.

SUMMERY OF THE UTILITY MODEL

According to the defects in the prior art, the technical problems to be solved by the utility model are as follows: provides an efficient preparation device of magnesium hydroxide, which solves the problem of low yield of the magnesium hydroxide in the production process.

The efficient preparation device of the magnesium hydroxide comprises a primary reaction container and a placing bracket, wherein the primary reaction container is arranged on the placing bracket; the top of the first-stage reaction vessel is provided with a first feed inlet for adding production raw material substances; a stirring device is arranged in the primary reaction container; a discharge pipe is arranged at the bottom of the primary reaction container, a valve is arranged on the discharge pipe, a primary filter screen is arranged below the primary reaction container, and a liquid separation box is arranged below the primary filter screen; a secondary reaction vessel is arranged on the placing bracket on the right side of the primary reaction vessel; the left side of the secondary reaction container is communicated with the liquid separation box through a communicating pipe, and a pump is arranged on the communicating pipe; the top of the secondary reaction container is provided with a second feeding hole for adding sodium hydroxide solution; a discharge pipe is arranged at the bottom of the secondary reaction container; and a secondary filter screen for filtering out magnesium hydroxide solids is arranged at the discharge end of a discharge pipe of the secondary reaction container.

The scheme is further optimized, the placing support is divided into an upper layer and a lower layer, and the first-stage reaction container and the second-stage reaction container are arranged on the upper layer of the placing support.

The scheme is further optimized, the lower end of a discharge pipe of the secondary reaction container is connected with a spiral pipe in a threaded manner; the secondary filter screen is arranged at the lower end in the spiral pipe.

The scheme is further optimized, the upper layer of placing the support is provided with the clear water tank that is used for supplying water to second grade reaction vessel, and clear water tank and second feed inlet pass through communicating pipe intercommunication, install the pump on communicating pipe.

The scheme is further optimized, and a filter screen bracket, a waste liquid tank and a material receiving box are arranged on the lower layer of the placing bracket; the first-stage filter screen is arranged on the filter screen bracket; the liquid separation box is arranged on the lower layer of the placing support.

Compared with the prior art, the utility model has the following beneficial effects:

the design ensures that the produced magnesium hydroxide solid does not contain calcium ions and silt impurities, improves the production efficiency and saves the production cost.

When the method is used, the magnesium chloride hexahydrate crystals are adopted as production raw materials, the preparation process is divided into two steps, the first step is to add the magnesium chloride hexahydrate crystals and water into a first-stage reaction container to be fully stirred and then filtered, the second step is to fully react a sodium hydroxide solution and the solution filtered in the first step in a second-stage reaction container again, and then the sodium hydroxide solution and the solution are washed and filtered for many times, and after the whole preparation process is finished, the magnesium hydroxide solid with higher purity is obtained through filtering by a filter screen (16).

Drawings

FIG. 1 is a schematic structural diagram of the present invention

FIG. 2 is an enlarged view of the structure at A in FIG. 1

Names of components in the drawings: 1. clear water tank 2, second grade reaction vessel 3, second feed inlet 4, pump 5, communicating pipe 6, agitating unit 7, agitator motor 8, first feed inlet 9, (mixing) shaft 10, one-level reaction vessel 11, stirring leaf 12, valve 13, place support 14, filter screen support 15, divide liquid case 16, second grade filter screen 17, spiral pipe 18, one-level filter screen 19, waste liquid case 20, the case that connects.

Detailed Description

The present invention is further described in the following detailed description with reference to the drawings, but the utility model is not limited thereto, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Example 1

The efficient preparation device of the magnesium hydroxide comprises a primary reaction container 10 and a placing bracket 13, wherein the primary reaction container 10 is arranged on the placing bracket 13; the top of the primary reaction vessel 10 is provided with a first feed inlet 8 for adding production raw material substances; a stirring device 6 is arranged in the primary reaction vessel 10; a discharge pipe is arranged at the bottom of the primary reaction container 10, a valve 12 is arranged on the discharge pipe, a primary filter screen 18 is arranged below the primary reaction container 10, and a liquid separation box 15 is arranged below the primary filter screen 18; a secondary reaction vessel 2 is arranged on the placing bracket 13 on the right side of the primary reaction vessel 10; the left side of the secondary reaction container 2 is communicated with a liquid distribution box 15 through a communicating pipe 5, and a pump 4 is arranged on the communicating pipe 5; the top of the secondary reaction container 2 is provided with a second feeding hole 3 for adding sodium hydroxide solution; a discharge pipe is arranged at the bottom of the secondary reaction container 2; and a secondary filter screen 16 for filtering out magnesium hydroxide solids is arranged at the discharge end of the discharge pipe of the secondary reaction container 2.

This embodiment has the following effects:

the design of the section divides the preparation process into two steps, and the impurities such as silt, calcium ions and the like in the magnesium chloride hexahydrate are effectively separated by a method of fully stirring and dissolving in the first-stage reaction vessel 10 and then filtering, so that the magnesium hydroxide solid obtained by production is purer; the funnel-shaped discharge port ensures that the generated products are not gathered and attached to the bottoms of the first-stage reaction vessel 10 and the second-stage reaction vessel 2; the filter screen can separate out solid and liquid, and has simple structure and convenient operation.

As shown in figure 1, the main component of the production raw material is magnesium chloride hexahydrate, but the production raw material contains silt and calcium ion impurities; when the device is used, the valve 12 is closed, the production raw materials and water are added into the primary reaction container 10 through the first feeding hole 8, the stirring device 6 is started, and the production raw materials are fully dissolved in the water under the stirring of the stirring device 6; after stirring for a period of time, opening a valve 12, pouring the mixed solution into a liquid separation box 15, separating insoluble silt impurities in the mixed solution by a primary filter screen 18 above the liquid separation box 15, wherein solute of the solution in the liquid separation box 15 comprises magnesium chloride hexahydrate, calcium ions and silt impurities dissolved in water; starting the pump 4, enabling the solution in the liquid separation box 15 to enter the secondary reaction container 2 through the communicating pipe 5, adding a sodium hydroxide solution into the secondary reaction container 2, fully reacting to obtain a magnesium hydroxide precipitate and a small amount of calcium hydroxide precipitate, opening a valve, separating the liquid in the secondary reaction container 2, taking down the secondary filter screen 16, and separating out a solid product.

In the concrete implementation, the stirring device 6 in the prior art (the name of the patent No. 201922450875.2: a high-efficiency preparation device of magnesium hydroxide) is used, the stirring device 6 comprises a stirring motor 7, a stirring shaft 9 and a stirring blade 11, and the stirring motor 7 is arranged at the top of a primary reaction vessel 10.

When magnesium chloride hexahydrate is used as a production raw material, a large amount of silt impurities and a small amount of calcium ion impurities are contained, so that the prepared magnesium hydroxide has low purity; however, the magnesium hydroxide is insoluble in water, and the calcium hydroxide is slightly soluble in water, so that the secondary reaction container 2 is washed and filtered by adding clear water for multiple times, and the fully washed product does not contain calcium hydroxide solid impurities, so that magnesium hydroxide solid precipitate is obtained, and the generated magnesium hydroxide is dried and crushed.

Example 2

This embodiment further illustrates the technology, in which the placing support 13 is divided into upper and lower layers, and the primary reaction vessel 10 and the secondary reaction vessel 2 are installed on the upper layer of the placing support 13.

This embodiment has the following effects:

in the design of this section, the design of upper and lower floor has reduced area, has effectively utilized the cubical space.

As shown in fig. 1, in specific implementation, the upper layer of the placing support 13 is provided with three through holes, and the through holes are convenient for installing the communicating pipe 5 and the discharging pipe.

Example 3

In this embodiment, the technology is further explained, the lower end of the discharge pipe of the secondary reaction vessel 2 is connected with a spiral pipe 17 by screw threads; the secondary filter screen 16 is arranged at the lower end of the interior of the spiral pipe 17.

This embodiment has the following effects:

as shown in figure 2, the spiral pipe 17 has a simple structure and is convenient to disassemble and assemble when in use.

In the specific implementation process, other structures can be adopted to replace the spiral pipe 17, for example, a frame is arranged right below the discharge pipe, and the secondary filter screen 16 is arranged at the upper end of the frame; the filtering device composed of the spiral pipe 17 and the secondary filtering net 16 is suitable for small-batch production.

In addition, when the type of the filtering tool is selected, filtering can be performed by adopting a filtering cloth; in order to optimize the filtering effect, a layer of filter paper can be added on the common filter screen, and a filter assembly consisting of the filter screen and the filter paper is arranged in the device.

Example 4

The technique is further explained in this embodiment, the upper layer of placing the support 13 is provided with the clear water tank 1 that is used for supplying water to the second grade reaction vessel 2, and the clear water tank 1 communicates with the second feed inlet 3 through communicating pipe, installs the pump on the communicating pipe.

This embodiment has the following effects:

as shown in figure 1, the design can clean the secondary reaction container 2, and can also dilute and filter impurities in the magnesium hydroxide for multiple times, so that the purity of the magnesium hydroxide is improved.

In specific implementation, after the liquid generated by the reaction in the secondary reaction container 2 is separated, the generated solid is still remained in the secondary reaction container 2, and then the water in the clean water tank 1 is pumped into the secondary reaction container 2 to perform secondary dilution and filtration on the generated solid.

Example 5

In this embodiment, the technology is further explained, a filter screen support 14, a waste liquid tank 19 and a material receiving tank 20 are placed on the lower layer of the placing support 13; the primary filter screen 18 is arranged on the filter screen bracket 14; the liquid separation box 15 is placed on the lower layer of the placing support 13.

This embodiment has the following effects:

as shown in fig. 1, in this design, the filter screen bracket 14 facilitates the installation of the primary filter screen 18; the liquid separation box 15 plays a role in starting and stopping in the production process; the waste liquid box 19 is used for collecting liquid filtered out from a discharge pipe of the secondary reaction container 2, the liquid separation box 15 is used for collecting a magnesium hydroxide finished product produced, the collected waste liquid can be repeatedly utilized in the collection work of the waste liquid, the resource waste is reduced, and the waste liquid is prevented from being discharged in the natural environment to cause pollution.

In specific implementation, the lower layer of the placing support 13 can also adopt a mode of arranging a chute to achieve the effect of placing the liquid separating box 15, the waste liquid box 19 and the material receiving box 20; liquid distribution box 15, waste liquid box 19 and material receiving box 20 in this design are sliding fit with placing support 13 and be connected, have both made things convenient for the collection work, have also carried out position restriction to liquid distribution box 15, waste liquid box 19 and material receiving box 20, make collection device can accurately arrive under the discharging pipe.

Claims

1. An efficient preparation device of magnesium hydroxide comprises a primary reaction container (10) and a placing support (13), wherein the primary reaction container (10) is arranged on the placing support (13); the top of the first-stage reaction vessel (10) is provided with a first feed inlet (8) for adding production raw material substances; a stirring device (6) is arranged in the primary reaction container (10); the bottom of one-level reaction vessel (10) is provided with the discharging pipe, installs valve (12), its characterized in that on the discharging pipe: a primary filter screen (18) is arranged below the primary reaction container (10), and a liquid separation box (15) is arranged below the primary filter screen (18); a secondary reaction vessel (2) is arranged on the placing bracket (13) at the right side of the primary reaction vessel (10); the left side of the secondary reaction container (2) is communicated with the liquid distribution box (15) through a communicating pipe (5), and a pump (4) is installed on the communicating pipe (5); the top of the secondary reaction container (2) is provided with a second feeding hole (3) for adding sodium hydroxide solution; a discharge pipe is arranged at the bottom of the secondary reaction container (2); a secondary filter screen (16) for filtering out magnesium hydroxide solids is arranged at the discharge end of the discharge pipe of the secondary reaction container (2).

2. The apparatus for efficiently producing magnesium hydroxide according to claim 1, wherein: the placing support (13) is divided into an upper layer and a lower layer, and the first-stage reaction container (10) and the second-stage reaction container (2) are arranged on the upper layer of the placing support (13).

3. The apparatus for efficiently producing magnesium hydroxide according to claim 1, wherein: the lower end of a discharge pipe of the secondary reaction container (2) is connected with a spiral pipe (17) in a threaded manner; the secondary filter screen (16) is arranged at the lower end inside the spiral pipe (17).

4. The apparatus for efficiently producing magnesium hydroxide according to claim 2, wherein: the upper layer of placing support (13) is provided with clear water tank (1) that is used for supplying water to second grade reaction vessel (2), and clear water tank (1) and second feed inlet (3) are through communicating pipe intercommunication, install the pump on communicating pipe.

5. The apparatus for efficiently producing magnesium hydroxide according to claim 1 or 2, characterized in that: a filter screen bracket (14), a waste liquid tank (19) and a material receiving tank (20) are arranged on the lower layer of the placing bracket (13); the primary filter screen (18) is arranged on the filter screen bracket (14); the liquid separation box (15) is arranged on the lower layer of the placing support (13).