CN114044531A - Production equipment and production process of magnesium hydroxide - Google Patents
Production equipment and production process of magnesium hydroxide Download PDFInfo
- Publication number
- CN114044531A CN114044531A CN202111404175.5A CN202111404175A CN114044531A CN 114044531 A CN114044531 A CN 114044531A CN 202111404175 A CN202111404175 A CN 202111404175A CN 114044531 A CN114044531 A CN 114044531A
- Authority
- CN
- China
- Prior art keywords
- magnesium hydroxide
- reaction kettle
- hydrothermal reaction
- waste liquid
- raw material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/14—Magnesium hydroxide
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention belongs to the technical field of magnesium hydroxide production, and particularly relates to magnesium hydroxide production equipment and a magnesium hydroxide production process, which comprise a controller and a supergravity reactor; the hypergravity reactor is communicated with a hydrothermal reaction kettle; the hydrothermal reaction kettle is communicated with a vacuum pump; a discharge hole of the hydrothermal reaction kettle is communicated with a washing and pressure filtering device; controlling the supersaturation degree of the solution after the reaction is finished by adjusting the air pressure in the hydrothermal reaction kettle by linking the operating parameters in the hypergravity reactor and the reaction parameters in the hydrothermal reaction kettle; the working effect of magnesium hydroxide production equipment is improved; the invention solves the problems that magnesium hydroxide synthesized under the normal temperature condition in the prior art has small particle size, strong surface polarity, easy agglomeration, irregular shape and no good combination with organic materials.
Description
Technical Field
The invention belongs to the technical field of magnesium hydroxide production, and particularly relates to magnesium hydroxide production equipment and a magnesium hydroxide production process.
Background
Magnesium hydroxide is used as an inorganic additive type flame retardant brake and is widely applied to the flame retardant field of high polymers such as plastics, rubber and the like. However, magnesium hydroxide synthesized at room temperature has a small particle size, a strong surface polarity, is easy to agglomerate, has an irregular morphology, and cannot be well composited with organic materials, and therefore, the magnesium hydroxide needs to be subjected to pretreatment to increase the particle size and improve the crystal form. Among the many treatments, the most studied and effective is the hydrothermal treatment technique. Although China has rich magnesium salt resources, the production and application of magnesium hydroxide do not draw enough attention, compared with developed countries, the development and application of magnesium hydroxide flame retardants in China are late, only several magnesium hydroxide flame retardant production units exist in China, the production scale is small, the product quality is unstable, and the market demand cannot be met. With the limited use of organic flame retardants such as brominated flame retardants, inorganic flame retardants have been developed unprecedentedly, and magnesium hydroxide flame retardants are receiving more and more attention.
For example, a chinese patent with application No. CN201110275320.4 discloses a method for producing flame retardant magnesium hydroxide, which uses magnesium chloride or magnesium nitrate or a magnesium salt obtained by reacting light calcined powder with ammonium chloride or ammonium nitrate by ammonia distillation as a raw material, and applies special processes, procedures and equipment to obtain a hexagonal flaky flame retardant magnesium hydroxide product by a one-step method without using any crystal form regulator.
Although the technical scheme has the characteristics of short process route, less operation steps, low requirements on temperature and pressure conditions, continuous and large-scale production and stable and reliable product quality, the production cost of the conventional flame retardant magnesium hydroxide product can be obviously reduced; however, magnesium hydroxide synthesized under the normal temperature condition in the prior art has small particle size, strong surface polarity, easy agglomeration, often irregular morphology and no good combination with organic materials; based on the technical scheme, the invention designs production equipment and a production process of magnesium hydroxide so as to solve the technical problems in the prior art.
Disclosure of Invention
The invention provides production equipment and a production process of magnesium hydroxide, which aim to make up the defects of the prior art and solve the problems that magnesium hydroxide synthesized under the normal temperature condition in the prior art is small in particle size, strong in surface polarity, easy to agglomerate, often has an irregular shape and cannot be well compounded with an organic material.
The technical scheme adopted by the invention for solving the technical problems is as follows: the production equipment of the magnesium hydroxide comprises a controller and a supergravity reactor; the hypergravity reactor is communicated with a hydrothermal reaction kettle; the hydrothermal reaction kettle is communicated with a vacuum pump; and a discharge hole of the hydrothermal reaction kettle is communicated with a washing and pressure filtering device.
Preferably, a waste liquid pipeline and a filter press are arranged in the washing and filter pressing device; and a recovery membrane is arranged in the waste liquid pipeline.
Preferably, a bypass pipe communicated with the filter press is arranged in the waste liquid pipeline.
Preferably, a circulating water path is arranged between the driving motor of the supergravity reactor and the waste liquid pipeline.
Preferably, the circulating water path comprises a bypass; the bypass is arranged around the surface of the hydrothermal reaction kettle.
Preferably, a cavity separating plate is connected inside the hydrothermal reaction kettle in a sliding manner; the upper end of the hydrothermal reaction kettle is provided with an air inlet.
Preferably, the waste liquid pipeline is arranged at the lower end of the filter press.
Preferably, the outer surface of the hydrothermal reaction kettle is provided with a winding groove; the winding groove and the bypass are matched with each other.
Preferably, the lower surface of the cavity separating plate is provided with an arc-shaped bulge; the arc-shaped protrusion is located at one end far away from the discharge hole.
The production process of the magnesium hydroxide is suitable for the production equipment of the magnesium hydroxide, and comprises the following process flows;
s1, firstly, carrying out operations such as decoloring, oxidizing, pH value adjusting, filtering and the like on raw material brine, and then mixing the raw material brine with process production water according to a certain proportion to form refined raw material brine; preparing reaction raw material alkali with certain solubility;
s2, placing the refined raw material halogen into a supergravity reactor for heating, adding the reaction raw material alkali with the same volume after heating to a certain temperature, continuing heating to 100 ℃, and preserving heat and aging for 4.5-5.5 h;
s3, pumping the feed liquid after heat preservation and aging into a hydrothermal reaction kettle; continuously heating to 200 ℃; after preserving the heat for a period of time, cooling and carrying out modification treatment;
and S4, washing and filter-pressing the modified slurry by a washing and filter-pressing device, drying, packaging, testing and warehousing after the modified slurry is qualified.
The invention has the following beneficial effects:
1. compared with the traditional technical scheme, the magnesium hydroxide production equipment and the magnesium hydroxide production process have the advantages that the supersaturation degree of a solution is controlled by adjusting the air pressure and the temperature in the hydrothermal reaction kettle through linkage of the operation parameters in the hypergravity reactor and the reaction parameters in the hydrothermal reaction kettle; the working effect of the magnesium hydroxide production equipment is improved.
2. According to the production equipment and the production process of the magnesium hydroxide, the bypass is arranged, so that heat generated by the driving motor in the hypergravity reactor is transferred to the surface of the hydrothermal reaction kettle, and the heat required for preheating the hydrothermal reaction kettle is reduced; then the heat of the hydrothermal reaction kettle after being preheated and cooled is conducted to a waste liquid pipeline through a bypass and a circulating water pipeline; the heat is further fully utilized, and the total heat stored in the pipeline by the heat transfer medium is increased through the arrangement of a plurality of pipelines.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a process flow diagram of the present invention;
in the figure: 1. a hypergravity reactor; 2. a hydrothermal reaction kettle; 3. a vacuum pump; 41. a waste liquid line; 42. a filter press; 5. a bypass pipe; 6. a circulating water path; 61. a bypass; 7. a cavity partition plate.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 2, the magnesium hydroxide production apparatus according to the present invention includes a controller and a high gravity reactor 1; the hypergravity reactor 1 is communicated with a hydrothermal reaction kettle 2; the hydrothermal reaction kettle 2 is communicated with a vacuum pump 3; a discharge hole of the hydrothermal reaction kettle 2 is communicated with a washing and pressure filtering device;
when the method works, the magnesium hydroxide synthesized under the normal temperature condition has small particle size, strong surface polarity, easy agglomeration and often irregular shape, and cannot be well compounded with organic materials;
adding raw material halogen into a hypergravity reactor 1, heating to react to a certain temperature, and then adding raw material alkali with the same volume; in the working process of the hypergravity reactor 1, the operation power parameter of the hypergravity reactor 1 is transmitted into the controller, and the hydrothermal reaction kettle 2 is pre-pumped to a negative pressure state through a vacuum pump 3; simultaneously, the hydrothermal reaction kettle 2 is preheated, so that the reaction temperature in the hydrothermal reaction kettle 2 can be increased, meanwhile, in the process of reducing the preheating temperature in the hydrothermal reaction kettle 2, the air pressure in the hydrothermal reaction kettle 2 is further reduced, then the interface between the vacuum pump 3 and the hydrothermal reaction kettle 2 is closed, the reaction liquid in the hypergravity reactor 1 is pumped into the hydrothermal reaction kettle 2 by a pump, during the reaction, the growth process of the crystal is closely related to the supersaturation degree of the solution, the higher the supersaturation degree of the solution is, the smaller the grain size of the crystal is, the lower the supersaturation degree of the solution is, the larger the grain size of the crystal is, therefore, the reaction temperature and the reaction pressure need to be adjusted according to the reaction condition in the reaction process, and the supersaturation degree of the reaction solution is adjusted by controlling the reaction pressure and the reaction temperature in the hydrothermal reaction kettle 2 to adjust the nucleation and growth speed of the particles so as to control the particle size; the finished product after the reaction in the hydrothermal reaction kettle 2 is finished flows into a washing and filter-pressing device for washing and filter-pressing to remove impurities in the finished product;
the supersaturation degree of the solution is controlled by adjusting the air pressure and the temperature in the hydrothermal reaction kettle 2 through the linkage of the operation parameters in the hypergravity reactor 1 and the reaction parameters in the hydrothermal reaction kettle 2; the working effect of the magnesium hydroxide production equipment is improved.
As an embodiment of the invention, the washing and pressure filtering device is internally provided with a waste liquid pipeline 41 and a pressure filter 42; a recovery membrane is arranged in the waste liquid pipeline 41; when the device works, the waste liquid pipeline 41 is arranged, after the reaction in the hydrothermal reaction kettle 2 is finished, the waste liquid enters the washing and pressure filtering device for washing, the finished product enters the pressure filter 42 for pressure filtering, the washed waste liquid enters the waste liquid pipeline 41 for recycling, the waste liquid passes through one side of the recycling membrane, tap water is introduced into the other side of the recycling membrane, and the recycling membrane has selective permeability, so that the recycling membrane has positive charges and attracts anions according to the characteristic that ions in the waste liquid have charges and the neutral property of the solution, and alkali ions are recycled from one side of the recycling membrane which is communicated with the tap water; the working effect of the magnesium hydroxide production equipment is improved.
As an embodiment of the present invention, a bypass pipe 5 communicating with a filter press 42 is provided in the waste liquid pipe 41; when the device works, the bypass pipe 5 is arranged, liquid generated by pressure filtration of the pressure filter 42 enters the waste liquid pipeline 41 through the bypass pipe 5, the filtration and separation of waste liquid in the waste liquid pipeline 41 are promoted by utilizing the pressure difference in the pressure filtration process, and alkali ion recovery is further carried out on the alkali liquor obtained by pressure filtration; the working effect of the magnesium hydroxide production equipment is improved.
As an embodiment of the present invention, a circulation water path 6 is provided between the driving motor of the high gravity reactor 1 and the waste liquid line 41; when the system works, the temperature rises in the working process of the driving motor of the hypergravity reactor 1 by arranging the circulating water path 6, and the temperature of the surface of the waste liquid pipeline 41 is increased by the circulating water path 6, so that the activity of alkali ions is enhanced, the hydrolysis degree is higher, and the recovery efficiency is improved; the working effect of the magnesium hydroxide production equipment is improved.
In one embodiment of the present invention, the circulation water path 6 includes a bypass 61; the bypass 61 surrounds the surface of the hydrothermal reaction kettle 2; when the device works, the bypass 61 is arranged, so that heat generated by the driving motor in the supergravity reactor 1 is transferred to the surface of the hydrothermal reaction kettle 2, and the heat required for preheating the hydrothermal reaction kettle 2 is reduced; then the heat of temperature reduction after the hydrothermal reaction kettle 2 is preheated is conducted to the waste liquid pipeline 41 through the bypass 61 and the circulating water pipeline 6; the heat is further fully utilized, and the total heat stored in the pipeline by the heat transfer medium is increased through the arrangement of a plurality of pipelines; the working effect of the magnesium hydroxide production equipment is improved.
As an embodiment of the invention, a cavity partition plate 7 is connected inside the hydrothermal reaction kettle 2 in a sliding manner; the upper end of the hydrothermal reaction kettle 2 is provided with an air inlet; when the device works, the cavity separating plate 7 is arranged, after a feed liquid enters the hydrothermal reaction kettle 2 for reaction, the air inlet is opened, and the cavity separating plate 7 is pushed by the external atmospheric pressure to extrude a finished product material in the hydrothermal reaction kettle 2 through the negative pressure in the hydrothermal reaction kettle 2; the working effect of the magnesium hydroxide production equipment is improved.
As an embodiment of the present invention, the waste liquid line 41 is disposed at the lower end of the filter press 42; when the filter press works, the waste liquid pipeline 41 is arranged at the lower end of the filter press 42, when the feed liquid enters the filter press 42 after being washed, the washed liquid enters the waste liquid pipeline 41 from the lower end; the liquid generated after the washed feed liquid is filter-pressed by the filter press 42 flows into the waste liquid pipeline 41 through the bypass 61 at the lower end of the filter press 42, so that the washed liquid can flow into the waste liquid pipeline 41 more completely; the working effect of the magnesium hydroxide production equipment is improved.
As an embodiment of the invention, the outer surface of the hydrothermal reaction kettle 2 is provided with a winding groove; the winding groove is matched with the bypass 61; when the device works, the winding groove is arranged, and the bypass 61 is attached to the surface of the hydrothermal reaction kettle 2 through the winding groove, so that the bypass 61 is attached to the hydrothermal reaction kettle 2 more tightly, and the effect of transferring heat through the bypass 61 is better; the working effect of the magnesium hydroxide production equipment is improved.
As an embodiment of the present invention, the lower surface of the cavity partition plate 7 is provided with an arc-shaped protrusion; the arc-shaped bulge is positioned at one end far away from the discharge hole; when the device works, the arc-shaped bulge is arranged at the lower end of the partition cavity plate 7, and when the partition cavity plate 7 extrudes a finished product material under the action of atmospheric pressure, the finished product material at the lower end is concentrated towards the discharge hole by the arc-shaped bulge, so that the finished product material can be discharged from the discharge hole more smoothly; the working effect of the magnesium hydroxide production equipment is improved.
The production process of the magnesium hydroxide is suitable for the production equipment of the magnesium hydroxide, and comprises the following process flows;
s1, firstly, carrying out operations such as decoloring, oxidizing, pH value adjusting, filtering and the like on raw material brine, and then mixing the raw material brine with process production water according to a certain proportion to form refined raw material brine; preparing reaction raw material alkali with certain solubility;
s2, placing the refined raw material halogen into the supergravity reactor 1 to be heated, adding the reaction raw material alkali with the same volume after the refined raw material halogen is heated to a certain temperature, continuing heating to 100 ℃, and preserving heat and aging for 4.5-5.5 h;
s3, pumping the feed liquid after heat preservation and aging into a hydrothermal reaction kettle 2; continuously heating to 200 ℃; after preserving the heat for a period of time, cooling and carrying out modification treatment;
and S4, washing and filter-pressing the modified slurry by a washing and filter-pressing device, drying, packaging, testing and warehousing after the modified slurry is qualified.
The specific working process is as follows:
adding raw material halogen into a hypergravity reactor 1, heating to react to a certain temperature, and then adding raw material alkali with the same volume; in the working process of the hypergravity reactor 1, the operation power parameter of the hypergravity reactor 1 is transmitted into the controller, and the hydrothermal reaction kettle 2 is pre-pumped to a negative pressure state through a vacuum pump 3; simultaneously, the hydrothermal reaction kettle 2 is preheated, so that the reaction temperature in the hydrothermal reaction kettle 2 can be increased, meanwhile, in the process of reducing the preheating temperature in the hydrothermal reaction kettle 2, the air pressure in the hydrothermal reaction kettle 2 is further reduced, then the interface between the vacuum pump 3 and the hydrothermal reaction kettle 2 is closed, the reaction liquid in the hypergravity reactor 1 is pumped into the hydrothermal reaction kettle 2 by a pump, during the reaction, the growth process of the crystal is closely related to the supersaturation degree of the solution, the higher the supersaturation degree of the solution is, the smaller the grain size of the crystal is, the lower the supersaturation degree of the solution is, the larger the grain size of the crystal is, therefore, the reaction temperature and the reaction pressure need to be adjusted according to the reaction condition in the reaction process, and the supersaturation degree of the reaction solution is adjusted by controlling the reaction pressure and the reaction temperature in the hydrothermal reaction kettle 2 to adjust the nucleation and growth speed of the particles so as to control the particle size; the finished product after the reaction in the hydrothermal reaction kettle 2 is finished flows into a washing and filter-pressing device for washing and filter-pressing to remove impurities in the finished product; through arranging the waste liquid pipeline 41, after the reaction in the hydrothermal reaction kettle 2 is finished, the waste liquid enters a washing and pressure filtering device for washing, a finished product enters a pressure filter 42 for pressure filtering, the washed waste liquid enters the waste liquid pipeline 41 for recycling, the waste liquid passes through one side of a recycling membrane, tap water is introduced into the other side of the recycling membrane, and the recycling membrane has selective permeability and is positively charged and attracts anions according to the characteristic that ions in the waste liquid are charged and the neutral property of the solution, so that alkali ions are recycled from one side of the recycling membrane through the tap water; by arranging the by-pass pipe 5, liquid generated by pressure filtration of the pressure filter 42 enters the waste liquid pipeline 41 through the by-pass pipe 5, the filtration and separation of the waste liquid in the waste liquid pipeline 41 are promoted by utilizing the pressure difference in the pressure filtration process, and alkali ion recovery is further carried out on the alkali liquor obtained by pressure filtration; by arranging the circulating water path 6, the temperature rises in the working process of the driving motor of the supergravity reactor 1, and the temperature of the surface of the waste liquid pipeline 41 is increased through the circulating water path 6, so that the activity of alkali ions is enhanced, the hydrolysis degree is higher, and the recovery efficiency is improved; by arranging the bypass 61, heat generated by a driving motor in the hypergravity reactor 1 is transferred to the surface of the hydrothermal reaction kettle 2, so that the heat required for preheating the hydrothermal reaction kettle 2 is reduced; then the heat of temperature reduction after the hydrothermal reaction kettle 2 is preheated is conducted to the waste liquid pipeline 41 through the bypass 61 and the circulating water pipeline 6; the heat is further fully utilized, and the total heat stored in the pipeline by the heat transfer medium is increased through the arrangement of a plurality of pipelines; by arranging the cavity separating plate 7, after the feed liquid enters the hydrothermal reaction kettle 2 for reaction, the air inlet is opened, and the cavity separating plate 7 is pushed by the external atmospheric pressure to extrude the finished product material in the hydrothermal reaction kettle 2 through the negative pressure in the hydrothermal reaction kettle 2; by disposing the waste liquid pipe 41 at the lower end of the filter press 42, when the feed liquid enters the filter press 42 after being washed, the liquid after being washed enters the waste liquid pipe 41 from the lower end; the liquid generated after the washed feed liquid is filter-pressed by the filter press 42 flows into the waste liquid pipeline 41 through the bypass 61 at the lower end of the filter press 42, so that the washed liquid can flow into the waste liquid pipeline 41 more completely; by arranging the winding groove, the bypass 61 is attached to the surface of the hydrothermal reaction kettle 2 through the winding groove, so that the bypass 61 is more tightly attached to the hydrothermal reaction kettle 2, and the effect of transferring heat through the bypass 61 is better; through being provided with the arc arch at the lower extreme that separates chamber board 7, separate chamber board 7 when extrudeing the finished product material under the effect of atmospheric pressure, the arc arch is concentrated the finished product material of lower extreme to the direction of discharge gate for the finished product material can be more smooth discharge from the discharge gate.
To verify the practical application effect of the present invention, the following grouping experiments were performed to perform the experiment for producing magnesium hydroxide:
in the experimental group 1, the production equipment and the production process of the invention are adopted to produce magnesium hydroxide;
in the experimental group 2, the production equipment and the production process are adopted, and a bypass pipe in the production equipment is removed to produce magnesium hydroxide;
in the experimental group 3, the production equipment and the production process are adopted, and the bypass in the production equipment is removed to produce the magnesium hydroxide;
in the experimental group 4, the magnesium hydroxide is produced by adopting the existing production equipment and production process;
measuring the time required for heating the hydrothermal reaction kettle to a certain temperature by adopting a thermometer and a timer; after the first reaction is finished, taking out the reaction solution, filtering, and obtaining the supersaturated precipitation amount of the solution after the reaction is finished by using an intelligent weighing meter; measuring the amount of recovered alkali ions by an acid-base titration method; other reaction conditions are controlled to be consistent by changing the concentration of the raw material halogen; recording various data in the reaction process of each experimental group, wherein the data recorded by each experimental group is as shown in the following table;
experimental group 1:
experimental group 2:
experimental group 3:
experimental group 4:
as can be seen from the experimental groups, different magnesium hydroxide production equipment and production processes are used, and the experimental data in the process of producing magnesium hydroxide are different;
by using the production equipment and the production process in the experimental group 1, in the production process, the precipitation amount of the supersaturated solution does not greatly float along with the change of the solubility of the raw material halogen after the reaction is finished;
compared with the experimental group 1, the experimental group 2 has the advantages that by using the production equipment and the production process, the bypass pipe in the production equipment is eliminated, and the detection data in the production process is compared, so that the quantity of recovered alkali ions is reduced;
comparing the experimental group 3 with the experimental group 1, the production equipment and the production process in the invention are used, the bypass in the production equipment is removed, and the detection data in the production process is compared, so that the time required for heating the hydrothermal reaction kettle to a certain temperature is increased;
in the experimental group 4, the time required for heating the hydrothermal reaction kettle is found to be increased by adopting the existing production equipment and production process; the change range of the supersaturated precipitation amount of the solution is large after the raw material halogen reaction with different solubility is finished; the amount of alkali ions recovered from the alkali liquor is reduced;
in conclusion, it can be found that the magnesium hydroxide produced by the production equipment and the production process of the present invention is not optimal for a single data parameter in the production process of magnesium hydroxide, but the method has corresponding advantages in optimizing the production of magnesium hydroxide after comprehensive comparison based on different production effects among experimental groups.
The front, the back, the left, the right, the upper and the lower are based on the observation angle of the person, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.
In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in fig. 1, and are used merely to facilitate the description of the present invention and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be taken as limiting the scope of the present invention.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A production facility of magnesium hydrate which is characterized in that: comprises a controller and a hypergravity reactor (1); the hypergravity reactor (1) is communicated with a hydrothermal reaction kettle (2); the hydrothermal reaction kettle (2) is communicated with a vacuum pump (3); and a discharge hole of the hydrothermal reaction kettle (2) is communicated with a washing and pressure filtering device.
2. The apparatus for producing magnesium hydroxide according to claim 1, wherein: a waste liquid pipeline (41) and a filter press (42) are arranged in the washing and filter pressing device; and a recovery membrane is arranged in the waste liquid pipeline (41).
3. The apparatus for producing magnesium hydroxide according to claim 2, wherein: and a bypass pipe (5) communicated with the filter press (42) is arranged in the waste liquid pipeline (41).
4. The production facility of magnesium hydroxide according to claim 2 or 3, characterized in that: and a circulating water channel (6) is arranged between a driving motor of the hypergravity reactor (1) and the waste liquid pipeline (41).
5. The apparatus for producing magnesium hydroxide according to claim 4, wherein: the circulating water path (6) comprises a bypass (61); the bypass (61) surrounds the surface of the hydrothermal reaction kettle (2).
6. The apparatus for producing magnesium hydroxide according to claim 1, wherein: a cavity separating plate (7) is connected inside the hydrothermal reaction kettle (2) in a sliding manner; the upper end of the hydrothermal reaction kettle (2) is provided with an air inlet.
7. The production facility of magnesium hydroxide according to claim 2 or 3, characterized in that: the waste liquid pipeline (41) is arranged at the lower end of the filter press (42).
8. The production facility of magnesium hydroxide according to claim 1 or 6, characterized in that: the outer surface of the hydrothermal reaction kettle (2) is provided with a winding groove; the winding groove and the bypass (61) are matched with each other.
9. The apparatus for producing magnesium hydroxide according to claim 6, wherein: the lower surface of the cavity separating plate (7) is provided with an arc-shaped bulge; the arc-shaped protrusion is located at one end far away from the discharge hole.
10. The production process of the magnesium hydroxide is characterized by comprising the following steps: the production process is suitable for the production equipment of the magnesium hydroxide as set forth in any one of claims 1 to 9, and the process flow is as follows;
s1, firstly, carrying out operations such as decoloring, oxidizing, pH value adjusting, filtering and the like on raw material brine, and then mixing the raw material brine with process production water according to a certain proportion to form refined raw material brine; preparing reaction raw material alkali with certain solubility;
s2, placing the refined raw material halogen into a supergravity reactor (1) for heating, adding the reaction raw material alkali with the same volume after heating to a certain temperature, continuing heating to 100 ℃, and preserving heat and aging for 4.5-5.5 h; (ii) a
S3, pumping the feed liquid after heat preservation and aging into a hydrothermal reaction kettle (2); continuously heating to 200 ℃; after preserving the heat for a period of time, cooling and carrying out modification treatment;
and S4, washing and filter-pressing the modified slurry by a washing and filter-pressing device, drying, packaging, testing and warehousing after the modified slurry is qualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111404175.5A CN114044531A (en) | 2021-11-24 | 2021-11-24 | Production equipment and production process of magnesium hydroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111404175.5A CN114044531A (en) | 2021-11-24 | 2021-11-24 | Production equipment and production process of magnesium hydroxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114044531A true CN114044531A (en) | 2022-02-15 |
Family
ID=80210743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111404175.5A Pending CN114044531A (en) | 2021-11-24 | 2021-11-24 | Production equipment and production process of magnesium hydroxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114044531A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101555665A (en) * | 2008-04-11 | 2009-10-14 | 冷博 | Identical reaction kettle reel-to-reel plasma ultrasonic supercritical non-aqueous dyeing |
| CN102031021A (en) * | 2010-11-30 | 2011-04-27 | 天津长芦汉沽盐场有限责任公司 | Process for preparing super-thin high-purity magnesium hydroxide fire retardant by supergravity-hydrothermal method |
| CN206535556U (en) * | 2017-02-07 | 2017-10-03 | 江苏极易新材料有限公司 | A kind of reactor cavitation system |
| CN208098036U (en) * | 2018-02-06 | 2018-11-16 | 天津悦鸣科技发展有限公司 | A kind of auto temperature controlled system producing concrete admixture |
| CN213590405U (en) * | 2020-09-21 | 2021-07-02 | 广西利土源农业科技有限公司 | Water-soluble fertile production is with high leakproofness reation kettle |
| CN214439009U (en) * | 2020-12-28 | 2021-10-22 | 长兴特殊材料（苏州）有限公司 | Reaction kettle heating system |
-
2021
- 2021-11-24 CN CN202111404175.5A patent/CN114044531A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101555665A (en) * | 2008-04-11 | 2009-10-14 | 冷博 | Identical reaction kettle reel-to-reel plasma ultrasonic supercritical non-aqueous dyeing |
| CN102031021A (en) * | 2010-11-30 | 2011-04-27 | 天津长芦汉沽盐场有限责任公司 | Process for preparing super-thin high-purity magnesium hydroxide fire retardant by supergravity-hydrothermal method |
| CN206535556U (en) * | 2017-02-07 | 2017-10-03 | 江苏极易新材料有限公司 | A kind of reactor cavitation system |
| CN208098036U (en) * | 2018-02-06 | 2018-11-16 | 天津悦鸣科技发展有限公司 | A kind of auto temperature controlled system producing concrete admixture |
| CN213590405U (en) * | 2020-09-21 | 2021-07-02 | 广西利土源农业科技有限公司 | Water-soluble fertile production is with high leakproofness reation kettle |
| CN214439009U (en) * | 2020-12-28 | 2021-10-22 | 长兴特殊材料（苏州）有限公司 | Reaction kettle heating system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104692574B (en) | Treatment method of high saline wastewater | |
| CA2789771C (en) | Highly pure lithium carbonate prepared using reverse osmosis | |
| CN101306260B (en) | Multifunctional multiple-effect automatic continuous evaporative crystallization technique and crystallization device | |
| CA3229219A1 (en) | Lithium recovery from brine | |
| CN104211098A (en) | Device and method for electrodialysis and electrolysis electrodialysis integrated processing of alkaline feed liquid in aluminium oxide production | |
| CN111905398A (en) | Process for producing nickel cobalt salt and ammonium salt by continuous crystallization | |
| CN106745102A (en) | A kind of preparation technology of lithium carbonate | |
| CN114044531A (en) | Production equipment and production process of magnesium hydroxide | |
| CN102092880B (en) | Process for freezing and denitriding primary brine with membrane method in polyvinyl chloride production | |
| CN209853744U (en) | Processing system of scavenging solution in lithium carbonate production technology | |
| CN107626112A (en) | A kind of continuous production vacuum cooling crystallizer | |
| CN111892071A (en) | Method for purifying lithium carbonate | |
| CN111960446A (en) | Method for continuously producing high-purity lithium carbonate | |
| CN115417432B (en) | Heavy ash production process system and production process thereof | |
| CN208320044U (en) | A kind of feed system of lithium hexafluoro phosphate crystallizer | |
| CN207655148U (en) | A kind of continuous process system of nickel-cobalt-manganese ternary hydroxide | |
| CN209291966U (en) | Device for filtering impurities for high purity phosphorus pentachloride synthesis | |
| CN209082002U (en) | A kind of machine water shutoff circulatory system | |
| CN209082001U (en) | A kind of system of electrolysis production chlorine and hydrogen | |
| CN110787479A (en) | Purification and crystallization device for zinc sulfate production and preparation method thereof | |
| CN105463505A (en) | Device and method for conducting diffusion dialysis and electrolysis electrodialysis integrated treatment on vanadium-alkali feed liquid in alkali method vanadium extraction process | |
| CN205999176U (en) | A kind of viscose rayon manufactures the processing system of the waste water that demineralized water produces in producing | |
| CN218281709U (en) | Production system capable of ensuring physical and chemical properties of glyoxylic acid | |
| CN218710087U (en) | System for controlling and recovering chromaticity of ditrimethylolester mother liquor in production of TMP (Trimethoprim) by calcium method | |
| CN213334632U (en) | Intelligent semiconductor heat supply boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |