Settling device for magnesium chloride production

Abstract

The utility model discloses a sedimentation device for magnesium chloride production, and relates to the technical field of magnesium chloride production devices, a first filter plate and a second filter plate are sequentially arranged in a sedimentation tank from top to bottom, stirring shafts are arranged at the upper parts of the first filter plate and the second filter plate, and auger blades are arranged on the outer sides of the stirring shafts; a liquid outlet is formed in the bottom of the settling tank, and slag outlets matched with the first filter plate and the second filter plate are respectively formed in the side wall of the settling tank. Through two times of filtration and sedimentation, the collection effect on magnesium chloride crystals is better, the magnesium chloride crystals are prevented from being discharged along with clear liquid, and the yield of magnesium chloride is increased. In addition, through the two auger blades, the settled crystals can be better guided to the slag outlet, and the possibility that the crystals are accumulated on the first filter plate and the second filter plate to cause blockage is greatly reduced. In addition, the auger blades can extrude the materials, solid-liquid separation is accelerated, and the settling speed is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of magnesium chloride production devices, in particular to a sedimentation device for magnesium chloride production. Background Art

[0002] Magnesium chloride is an important inorganic raw material in the chemical industry. It is used to produce magnesium products such as magnesium carbonate, magnesium hydroxide, magnesium oxide, and is also used as a raw material for antifreeze. In the metallurgical industry, it is used to produce metallic magnesium (produced by molten electrolysis), liquid chlorine, and high-purity magnesia. In the building materials industry, it is an important raw material for the production of light building materials such as fiberglass tiles, decorative panels, sanitary ware, ceilings, floor tiles, magnesia cement, ventilation ducts, anti-theft manhole covers, fireproof doors and windows, fireproof panels, partition boards, and the production of artificial marble and other high-rise building supplies. Magnesium products can be made into high-quality magnesium tiles, high-quality fireproof panels, magnesium packaging boxes, magnesium decorative panels, lightweight wall panels, molds, stoves, fireworks solidifiers, etc.

[0003] Chinese patent CN219540307U discloses a hydrolyzate neutralization and sedimentation device for xylose production, which can not only achieve full stirring and neutralization of the hydrolyzate, but also can efficiently and centrally collect the calcium sulfate crystals produced during the neutralization process, effectively reduce the content of calcium sulfate in the xylose liquid in the subsequent discharge process of the neutralized xylose liquid, reduce the load of the subsequent cation resin exchange, and provide strong support for the efficient processing and production of xylitol. However, the crystal interception effect is poor, and the settled crystals are easily discharged together with the settled clear liquid, resulting in a reduction in product yield and a waste of raw materials, which increases production costs. Summary of the invention

[0004] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a sedimentation device for magnesium chloride production is provided, which reduces the waste of raw materials, improves the yield of products and reduces the production cost.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A sedimentation device for magnesium chloride production, comprising a sedimentation tank, wherein a first filter plate and a second filter plate are sequentially arranged in the sedimentation tank from top to bottom, a stirring shaft is arranged on the upper part of the first filter plate and the second filter plate, an auger blade is arranged on the outer side of the two stirring shafts, and one end of the two stirring shafts is respectively connected to a motor;

[0007] The top of the settling tank is provided with a feed port, the bottom of the settling tank is provided with a liquid outlet, and the side walls of the settling tank are respectively provided with slag outlets adapted to the first filter plate and the second filter plate.

[0008] As an improved technical solution, the first filter plate and the second filter plate are both arranged inclined.

[0009] As an improved technical solution, the inclination directions of the first filter plate and the second filter plate are opposite, the two slag outlets are respectively arranged on one side of the lowest end of the first filter plate and the second filter plate, and the height of the two slag outlets is greater than the height of the lowest end of the first filter plate and the second filter plate.

[0010] As an improved technical solution, the cross-sections of the first filter plate and the second filter plate along the stirring axis direction are arc-shaped.

[0011] As an improved technical solution, a third filter plate is provided below the second filter plate, and the side walls of the sedimentation tank are respectively provided with slag discharge ports adapted to the third filter plate.

[0012] As an improved technical solution, the liquid outlet is connected to a circulation pump through a pipeline, and the outlet of the circulation pump is connected to the top liquid return port of the sedimentation tank through a pipeline.

[0013] As a preferred technical solution, a liquid return pipe is provided on the inner side of the liquid return port, and one end of the bottom of the liquid return pipe is connected to a distribution plate. The distribution plate includes an annular distribution pipe and a liquid guide pipe respectively connected to the distribution pipe and the liquid return pipe, and a plurality of nozzles are circumferentially provided at the lower part of the distribution pipe.

[0014] As a preferred technical solution, the plurality of nozzles are arranged obliquely toward the inner wall of the settling tank.

[0015] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0016] The utility model discloses a sedimentation device for magnesium chloride production, comprising a sedimentation tank, wherein a first filter plate and a second filter plate are sequentially arranged in the sedimentation tank from top to bottom, a stirring shaft is arranged on the upper part of the first filter plate and the second filter plate, an auger blade is arranged on the outer side of the two stirring shafts, and one end of the two stirring shafts is respectively connected to a motor; a feed port is arranged on the top of the sedimentation tank, a liquid outlet is arranged on the bottom of the sedimentation tank, and a slag outlet adapted to the first filter plate and the second filter plate is respectively arranged on the side wall of the sedimentation tank. The magnesium chloride material enters the sedimentation tank from the feed port, and is subjected to the first sedimentation filtration after reaching the first filter plate, and then the permeate of the first filter plate is filtered again by the second filter plate, and finally the sedimentation clear liquid is discharged and collected from the liquid outlet, while the sedimentation solid phase is discharged and collected from the two slag outlets respectively. Through two filtration and sedimentation, the collection effect of magnesium chloride crystals is better, and it is avoided that the crystals are discharged with the clear liquid, thereby improving the yield of magnesium chloride. In addition, the two auger blades can better guide the settled crystals to the slag outlet, greatly reducing the possibility of crystal accumulation on the first filter plate and the second filter plate causing blockage. In addition, the auger blades can squeeze the material, accelerate the separation of solid and liquid, and make the sedimentation faster.

[0017] The first filter plate and the second filter plate of the utility model are both inclined, and the magnesium chloride crystals obtained by two sedimentations can flow to the slag outlet and be discharged under the action of gravity, which greatly reduces the possibility of crystal accumulation on the first filter plate and the second filter plate.

[0018] The first filter plate and the second filter plate are inclined in opposite directions, and the two slag outlets are respectively arranged on one side of the lowest end of the first filter plate and the second filter plate, and the height of the two slag outlets is greater than the height of the lowest end of the first filter plate and the second filter plate. The first filter plate and the second filter plate arranged in opposite directions increase the residence time of the magnesium chloride liquid on the first filter plate and the second filter plate, and also increase the contact area between the material and the filter plate, so that the sedimentation filtration effect is better. In addition, the height of the slag outlet is greater than the height of the lowest end of the two filter plates to avoid the discharge of clear liquid from the slag outlet, and the solid-liquid separation effect is better.

[0019] The cross-sections of the first filter plate and the second filter plate along the stirring axis are arc-shaped, and the magnesium chloride material moves from both ends of the first filter plate and the second filter plate to the middle and finally moves to the lowest ends of the first filter plate and the second filter plate, thereby increasing the contact area and contact time between the material and the filter plate, and achieving a better solid-liquid separation effect.

[0020] A third filter plate is provided at the lower part of the second filter plate, and the side walls of the settling tank are respectively provided with slag discharge ports adapted to the third filter plate. The permeate of the first filter plate and the second filter plate is separated again by the third filter plate, and the separation and extraction effect of magnesium chloride crystals is better.

[0021] The liquid outlet is connected to a circulation pump through a pipeline, and the outlet of the circulation pump is connected to the top liquid return port of the sedimentation tank through a pipeline. The separated clear liquid can be pumped into the sedimentation tank again through the circulation pump for re-separation, thereby avoiding the situation where a large amount of magnesium chloride crystals exist in the clear liquid. In addition, the clear liquid can wash the inner wall of the sedimentation tank, thereby avoiding the material from being retained on the inner wall of the sedimentation tank to form a wall, thereby reducing the difficulty of later cleaning.

[0022] A liquid return pipe is provided inside the liquid return port, and one end of the bottom of the liquid return pipe is connected to a distribution plate, and the distribution plate includes an annular distribution pipe and a liquid guide pipe respectively connected to the distribution pipe and the liquid return pipe, and a plurality of nozzles are provided circumferentially at the lower part of the distribution pipe. The material enters the liquid guide pipe from the liquid return pipe and finally enters the annular distribution pipe, and then is sprayed out from the nozzles arranged circumferentially, so that the material is more evenly distributed in the sedimentation tank, and at the same time, the plurality of nozzles are inclined toward the inner wall of the sedimentation tank, so that the flushing effect on the inner wall of the sedimentation tank is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1It is a schematic diagram of the structure of an embodiment of the utility model;

[0025] Figure 2 It is a cross-sectional view of an embodiment of the utility model;

[0026] Figure 3 It is a cross-sectional view of another direction of the embodiment of the utility model;

[0027] Among them: 1. sedimentation tank; 2. first filter plate; 3. second filter plate; 4. stirring shaft; 5. auger blade; 6. motor; 7. feed port; 8. liquid outlet; 9. slag outlet; 10. third filter plate; 11. slag outlet; 12. circulation pump; 13. liquid return port; 14. liquid return pipe; 15. distribution pipe; 16. liquid guide pipe; 17. nozzle. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] like Figure 1-3 As shown, a settling device for magnesium chloride production comprises a settling tank 1, wherein the settling tank 1 is provided with a first filter plate 2 and a second filter plate 3 from top to bottom, the upper parts of the first filter plate 2 and the second filter plate 3 are provided with a stirring shaft 4, the outer sides of the two stirring shafts 4 are provided with auger blades 5, and one end of the two stirring shafts 4 is respectively connected with a motor 6; the top of the settling tank 1 is provided with a feed port 7, the bottom of the settling tank 1 is provided with a liquid outlet 8, and the side wall of the settling tank 1 is respectively provided with a slag outlet 9 adapted to the first filter plate 2 and the second filter plate 3. The magnesium chloride material enters the settling tank 1 from the feed port 7, and is subjected to the first settling filtration after reaching the first filter plate 2, and then the permeate of the first filter plate 2 is filtered again by the second filter plate 3, and finally the clear liquid of the settling is discharged and collected from the liquid outlet 8, and the solid phase of the settling is discharged and collected from the two slag outlets 9 respectively. Through two filtration and settling, the collection effect of magnesium chloride crystals is better, and it is prevented from being discharged with the clear liquid, thereby improving the yield of magnesium chloride. In addition, the two auger blades 5 can better guide the settled crystals to the slag outlet 9, greatly reducing the possibility of crystals accumulating on the first filter plate 2 and the second filter plate 3 to cause blockage. In addition, the auger blades 5 can squeeze the material, accelerate the separation of solid and liquid, and make the sedimentation speed faster.

[0030] The first filter plate 2 and the second filter plate 3 are both inclined, and the magnesium chloride crystals obtained by the two sedimentations can flow to the slag outlet 9 under the action of gravity and be discharged, which greatly reduces the possibility of crystals accumulating on the first filter plate 2 and the second filter plate 3.

[0031] The first filter plate 2 and the second filter plate 3 are inclined in opposite directions, and the two slag outlets 9 are respectively arranged on one side of the lowest end of the first filter plate 2 and the second filter plate 3, and the height of the two slag outlets 9 is greater than the height of the lowest end of the first filter plate 2 and the second filter plate 3. The first filter plate 2 and the second filter plate 3 arranged in opposite directions increase the residence time of the magnesium chloride liquid on the first filter plate 2 and the second filter plate 3, and also increase the contact area between the material and the filter plate, so that the sedimentation filtration effect is better. In addition, the height of the slag outlet 9 is greater than the height of the lowest end of the two filter plates, which can prevent the clear liquid from being discharged from the slag outlet 9, and the solid-liquid separation effect is better.

[0032] The cross-sections of the first filter plate 2 and the second filter plate 3 along the stirring shaft 4 are arc-shaped. The magnesium chloride material moves from both ends of the first filter plate 2 and the second filter plate 3 to the middle and finally moves to the lowest ends of the first filter plate 2 and the second filter plate 3, thereby increasing the contact area and contact time between the material and the filter plate, and achieving a better solid-liquid separation effect.

[0033] A third filter plate 10 is provided at the lower part of the second filter plate 3, and the side walls of the settling tank 1 are respectively provided with slag discharge ports 11 adapted to the third filter plate 10. The permeate of the first filter plate 2 and the second filter plate 3 is separated again by the third filter plate 10, and the separation and extraction effect of magnesium chloride crystals is better.

[0034] The liquid outlet 8 is connected to a circulation pump 12 through a pipeline, and the outlet of the circulation pump 12 is connected to the top liquid return port 13 of the settling tank 1 through a pipeline. The separated clear liquid can be pumped into the settling tank 1 again through the circulation pump 12 for re-separation, thereby avoiding the situation where a large amount of magnesium chloride crystals exist in the clear liquid. In addition, the clear liquid can wash the inner wall of the settling tank 1, thereby avoiding the material from being retained on the inner wall of the settling tank 1 to form a wall, thereby reducing the difficulty of later cleaning.

[0035] A liquid return pipe 14 is provided inside the liquid return port 13, and one end of the bottom of the liquid return pipe 14 is connected to a distribution plate, and the distribution plate includes an annular distribution pipe 15 and a liquid guide pipe 16 respectively connected to the distribution pipe 15 and the liquid return pipe 14, and a plurality of nozzles 17 are circumferentially provided at the lower part of the distribution pipe 15. The material enters the liquid guide pipe 16 from the liquid return pipe 14 and finally enters the annular distribution pipe 15, and then is sprayed out from the nozzles 17 arranged circumferentially, so that the material is more evenly distributed in the settling tank 1, and at the same time, the plurality of nozzles 17 are inclined toward the inner wall of the settling tank 1, so that the flushing effect on the inner wall of the settling tank 1 is better.

[0036] It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A magnesium chloride production settling device, comprising a settling tank, characterized in that: The settling tank is provided with a first filter plate and a second filter plate in order from top to bottom, the upper parts of the first filter plate and the second filter plate are provided with stirring shafts, the outer sides of the two stirring shafts are provided with auger blades, and one end of the two stirring shafts is respectively connected to a motor; The top of the settling tank is provided with a feed port, the bottom of the settling tank is provided with a liquid outlet, and the side walls of the settling tank are respectively provided with slag outlets adapted to the first filter plate and the second filter plate.

2. A magnesium chloride production settling device as claimed in claim 1, characterized in that: The first filter plate and the second filter plate are both arranged tilted.

3. A magnesium chloride production settling device as claimed in claim 2, characterized in that: The first filter plate and the second filter plate are inclined in opposite directions, the two slag outlets are respectively arranged on one side of the lowest end of the first filter plate and the second filter plate, and the height of the two slag outlets is greater than the height of the lowest end of the first filter plate and the second filter plate.

4. A magnesium chloride production settling device as claimed in claim 3, characterized in that: The cross-sections of the first filter plate and the second filter plate along the stirring axis are arc-shaped.

5. A magnesium chloride production settling device as claimed in claim 1, characterized in that: A third filter plate is provided at the lower part of the second filter plate, and the side walls of the settling tank are respectively provided with slag discharge ports adapted to the third filter plate.

6. A magnesium chloride production settling device as claimed in claim 1, characterized in that: The liquid outlet is connected to a circulation pump through a pipeline, and the outlet of the circulation pump is connected to the top liquid return port of the sedimentation tank through a pipeline.

7. A magnesium chloride production settling device as claimed in claim 6, characterized in that: A liquid return pipe is provided inside the liquid return port, and one end of the bottom of the liquid return pipe is connected to a distribution plate. The distribution plate includes an annular distribution pipe and a liquid guide pipe respectively connected to the distribution pipe and the liquid return pipe. A plurality of nozzles are circumferentially provided at the lower part of the distribution pipe.

8. A magnesium chloride production settling device as claimed in claim 7, characterized in that: The plurality of nozzles are arranged obliquely toward the inner wall of the settling tank.

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