Solid-liquid separation equipment for calcium carbonate slurry

Abstract

The utility model provides calcium carbonate slurry solid-liquid separation equipment which comprises a vertically arranged cylindrical barrel, the top of the barrel is provided with a slurry inlet and a stirring motor, and the bottom of the barrel is connected with a T-shaped annular discharge port; a plurality of layers of inclined plates are arranged on the inner wall of the cylinder body, a vibrator is fixed on the outer side of the bottom of the cylinder body, and a flaring is formed in the cylinder body; a driving shaft of the stirring motor is connected with the stirring shaft; a scraping plate parallel to the bottom of the barrel is fixed at the tail end of the stirring shaft; the T-shaped annular discharge port comprises a solid discharge port and an air / water inlet, and a gas-liquid mixing zone annular gap is formed at the intersection of the solid discharge port and the air / water inlet. Through the design of the inclined plate and the flaring, solid particles can be more effectively settled to the bottom of the barrel body, the treatment speed is high, and the overall production efficiency is improved. And calcium carbonate can be effectively prevented from being deposited on the inner wall and the bottom of the cylinder body through the design of the vibrator and the scraper. By means of the T-shaped annular discharging port and the air / water purging design, blocking of calcium carbonate at the discharging port can be prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to calcium carbonate preparation technical field especially is related to a calcium carbonate slurry solid-liquid separation equipment. BACKGROUND

[0002] In the process of producing calcium carbonate in ammonia-calcium chloride system, it is often necessary to separate the calcium carbonate slurry to obtain solid calcium carbonate product and reusable liquid. However, due to the ammonia molecules may be adsorbed on the surface of calcium carbonate crystals under this system. This adsorption can change the charge distribution and energy state of the surface of calcium carbonate crystals. When ammonia is adsorbed on a specific crystal face of calcium carbonate, the surface energy of the crystal face is reduced, thereby promoting the growth of calcium carbonate crystals on this crystal face. According to the crystal nucleation theory, the reduction of surface energy is conducive to the nucleation of crystals, thereby leading to easier deposition of calcium carbonate. It is easy to cause the deposition of calcium carbonate on the surface of the separation equipment, resulting in poor discharge or blockage. The existing solid-liquid separation equipment has some deficiencies when processing calcium carbonate slurry. For example, the separation efficiency of some equipment is low, resulting in too high water content of solid product or too many solid particles remaining in the liquid; the structure of some equipment is relatively complex, inconvenient to operate and maintain, and occupies a large space, increasing the production cost. Therefore, it is necessary to design a high-efficiency, simple and easy-to-operate calcium carbonate slurry solid-liquid separation equipment. SUMMARY

[0003] The utility model discloses a kind of calcium carbonate slurry solid-liquid separation equipment, with the characteristics of efficient separation, anti-deposition blockage, compact structure.

[0004] According to the purpose of the utility model, the utility model provides a kind of calcium carbonate slurry solid-liquid separation equipment, including vertically arranged cylinder body, the top of the cylinder body is equipped with slurry inlet and stirring motor, the bottom of the cylinder body is connected T type annular discharge port;The inner wall of the cylinder body is equipped with multiple layers of obliquely arranged baffle, the outside of the bottom of the cylinder body is fixed with vibrator, the inside of the cylinder body is equipped with flared portion;The drive shaft of the stirring motor is connected with stirring shaft, the end of the stirring shaft is fixed with scraper plate, which is arranged in parallel with the bottom of the cylinder body;The T type annular discharge port includes solid discharge port and air / water inlet, and the intersection of the two forms gas-liquid mixing zone annular gap.

[0005] Further, the upper end of the baffle is fixed to the bottom of the solid-liquid separation zone of the inner wall of the cylinder body, the lower end of the baffle is gathered towards the T type annular discharge port, the inclination angle of the baffle is 45°-65°, and the spacing between the baffles is 5-10 cm.

[0006] Further, the vibrator is a pneumatic hammer, the vibration frequency is 20-50 Hz, and the amplitude is 1-5 mm.

[0007] Further, the material of the scraper is wear-resistant rubber, the distance between the scraper and the bottom of the cylinder is 5-10mm, and the rotating speed of the stirring motor is 10-30rpm.

[0008] Further, the air / water inlet of the T-shaped annular discharge port has a gas velocity of 50-100L / h, and the air / water inlet is communicated with the solid discharge port through the annular gap of the gas-liquid mixing area.

[0009] Further, the inner wall of the cylinder is coated with an anti-corrosion coating, and the height-diameter ratio of the cylinder is 2.5-3.5:1.

[0010] Further, the upper part of the cylinder is provided with a clear liquid outlet, and the clear liquid outlet is connected with a precision filter with a pore size of ≤10μm.

[0011] Further, the flared mouth is fixed to the central position inside the cylinder through a support frame, and the flared mouth is located in the T-shaped annular discharge port.

[0012] Further, the slurry inlet is located at the top side wall of the cylinder, and the slurry treatment concentration in the cylinder is 1%-6%.

[0013] Further, the cylinder is fixed through a support.

[0014] The technical scheme of the utility model discloses through the design of the inclined plate and the flared mouth, solid particles can be more effectively settled to the bottom of the cylinder, which helps to speed up the processing speed and improve the overall production efficiency. Through the design of the vibrator and the scraper, the deposition of calcium carbonate on the inner wall and the bottom of the cylinder can be effectively prevented. Through the design of the T-shaped annular discharge port and the air / water blowing, the blockage of calcium carbonate in the discharge port can be prevented. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0016] Fig. 1 It is a structural schematic view of the embodiment of the utility model;

[0017] Fig. 2 It is a structural schematic view of the T-shaped annular discharge port of the embodiment of the utility model;

[0018] In the figure: 1 - stirring motor; 2 - clear liquid outlet; 3 - barrel; 4 - inclined plate; 5 - support; 6 - vibrator; 7 - T-shaped annular discharge port; 8 - scraper; 9 - flared portion; 10 - stirring shaft; 11 - slurry inlet; 701 - solid discharge port; 702 - annular gap of gas-liquid mixing zone; 703 - air / water inlet. DETAILED DESCRIPTION

[0019] The technical solutions of the present application will be described below in conjunction with the embodiments, obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0020] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0021] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited. In addition, the terms "mounting", "connecting", "connecting" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] Example 1

[0023] As Figs. 1-2 shown,

[0024] A calcium carbonate slurry solid-liquid separation device includes a vertically arranged cylindrical body 3, which is fixed to the ground by a support 5. The height-to-diameter ratio of the body 3 is 2.5 to 3.5:1. The inner wall of the body 3 is coated with an anti-corrosion coating to prevent the slurry from corroding the body and extend the service life of the device.

[0025] A stirring motor 1 is fixed to the top of the cylinder 3, and the stirring motor 1 rotates at a speed of 10-30 rpm. The output shaft of the stirring motor 1 is connected to a stirring shaft 10, which is located at the central axis of the cylinder 3 and passes through the cylinder 3. The stirring motor 1 drives the stirring shaft 10 to rotate. A scraper 8 is fixed to the bottom of the stirring shaft 10, with a distance of 5-10 mm between the scraper 8 and the bottom of the cylinder 3. The scraper 8 is parallel to the bottom of the cylinder 3 and is made of wear-resistant rubber. This effectively scrapes off the calcium carbonate deposited at the bottom of the cylinder while reducing wear between the scraper and the bottom of the cylinder.

[0026] The top of the cylinder 3 is equipped with a slurry inlet 11, and the bottom of the cylinder 3 is connected to a T-shaped annular discharge port 7. The upper part of the cylinder 3 is equipped with a clear liquid outlet 2, which is connected to a filter device. The filter device connected to the clear liquid outlet 2 is a fine filter with a pore size ≤10μm. The filter device installed at the clear liquid outlet 2 can effectively improve the purity of the clear liquid.

[0027] The cylinder 3 is equipped with multiple layers of inclined plates 4, with an inclination angle of 45° to 65° and a spacing of 5 to 10 cm between the inclined plates 4. The inclined plates 4 are inclinedly arranged in the middle of the cylinder 3, with the upper end of the inclined plates 4 fixed to the bottom of the solid-liquid separation zone and the lower end of the inclined plates 4 tapering towards the T-shaped discharge port 7. The multiple layers of inclined plates 4 inside the cylinder 3 can effectively promote solid sedimentation.

[0028] A vibrator 6 is fixed on the outer bottom of the cylinder 3. In this embodiment, the vibrator is a pneumatic hammer. The vibration frequency of the vibrator 6 is 20-50Hz and the amplitude is 1-5mm. The vibrator 6 is installed at the bottom of the cylinder 3 and, together with the scraper 4, achieves the function of preventing sedimentation.

[0029] The cylinder 3 has an flared opening 9 inside. The flared opening 9 is fixed in the center of the cylinder 3 by a support frame. The flared opening 9 is located above the T-shaped annular discharge port 7 and is used to reduce the impact of the feed on the bottom material.

[0030] like Fig. 2 As shown, the T-shaped annular discharge port 7 includes two solid discharge ports 701 and an air / water inlet 703; the T-shaped annular discharge port 7 forms a gas-liquid mixing zone annular gap 702 at the junction of the solid discharge ports 701 and the air / water inlet 703; the gas velocity of the air / water inlet 703 is 50-100 L / h. The inclusion of the air / water inlet 703 in the T-shaped annular discharge port 7 can prevent blockage.

[0031] When using this utility model:

[0032] A slurry of calcium carbonate with a concentration of 2% is injected into the cylinder 3 (2m high, 0.8m in diameter) through the slurry inlet 11. Under the action of gravity, the slurry slides along the inclined plate 4 (inclination angle 55°, spacing 8cm) and settles at the bottom through the flared outlet 9. The stirring motor 1 (rotation speed 20rpm) is started to rotate the scraper 8. The vibrator 6 (frequency 25Hz, amplitude 2mm) is vibrated synchronously to prevent the calcium carbonate from depositing at the bottom of the cylinder. 3 A slurry of calcium carbonate with a concentration of 2% is injected into the cylinder 3 (2m high, 0.8m in diameter) through the slurry inlet 11. Under the action of gravity, the slurry slides along the inclined plate 4 (inclination angle 55°, spacing 8cm) and settles at the bottom through the flared outlet 9. The stirring motor 1 (rotation speed 20rpm) is started to rotate the scraper 8. The vibrator 6 (frequency 25Hz, amplitude 2mm) is vibrated synchronously to prevent the calcium carbonate from depositing at the bottom of the cylinder.

[0033] When the solid particles accumulate to a certain extent, they will be discharged from the cylinder through the T-shaped annular discharge port. The solid is discharged through the solid discharge port 701 of the T-shaped annular discharge port 7. At the same time, in order to prevent the discharge port from being blocked, air or water is blown in through the air / water inlet. The air is blown in at a rate of 80L / h from the air / water inlet 703 to prevent the calcium carbonate thick slurry from blocking the discharge port.

[0034] At the same time, the clear liquid separated in the solid-liquid separation zone is discharged through the clear liquid outlet 2. A fine filter is installed at the clear liquid outlet to further separate the fine solid particles in the clear liquid, thereby achieving solid-liquid separation of the calcium carbonate slurry. The concentration of calcium carbonate at the slurry discharge port is measured to be 20.6%, and the concentration of calcium carbonate at the clear liquid outlet is measured to be 32.4ppm.

[0035] The calcium carbonate slurry treated by the device has a concentration of 1-6%. The design of the inclined plate 4 and the flared outlet 9 can accelerate the settling of solids and improve the separation efficiency. The vibrator 6 and the scraper 4 work together to effectively prevent the deposition at the bottom of the cylinder. The T-shaped annular discharge port 7 is combined with air / water blowing to avoid blockage. The corrosion-resistant coating and the filtering device prolong the service life of the equipment and improve the quality of the clear liquid.

[0036] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A calcium carbonate slurry solid-liquid separation apparatus, characterized by, The application relates to a slurry treatment device, which comprises a vertically arranged cylindrical barrel, a slurry inlet and a stirring motor arranged at the top of the barrel, a T-shaped annular discharge port connected to the bottom of the barrel, a plurality of oblique plates arranged in multiple layers on the inner wall of the barrel, a vibrator fixed to the outside of the bottom of the barrel, an expansion joint arranged in the barrel, a driving shaft of the stirring motor connected with a stirring shaft, a scraper fixed to the end of the stirring shaft and arranged in parallel with the bottom of the barrel, and a solid discharge port and an air / water inlet of the T-shaped annular discharge port, which form a gas-liquid mixing zone annular gap.

2. The calcium carbonate slurry solid-liquid separation apparatus according to claim 1, characterized in that, The upper end of the oblique plate is fixed to the bottom of the solid-liquid separation zone of the inner wall of the barrel, the lower end of the oblique plate is folded towards the T-shaped annular discharge port, the inclination angle of the oblique plate is 45-65 DEG, and the spacing between the oblique plates is 5-10 cm.

3. The calcium carbonate slurry solid-liquid separation apparatus according to claim 1, characterized in that, The vibrator is a pneumatic hammer, the vibration frequency is 20-50 Hz, and the amplitude is 1-5 mm.

4. The calcium carbonate slurry solid-liquid separation apparatus of claim 1, wherein, The scraper is made of wear-resistant rubber, the spacing between the scraper and the bottom of the barrel is 5-10 mm, and the rotating speed of the stirring motor is 10-30 rpm.

5. The calcium carbonate slurry solid-liquid separation apparatus of claim 1, wherein, The air speed of the air / water inlet of the T-shaped annular discharge port is 50-100 L / h, and the air / water inlet is communicated with the solid discharge port through the gas-liquid mixing zone annular gap.

6. The calcium carbonate slurry solid-liquid separation apparatus of claim 1, wherein, The inner wall of the barrel is coated with an anticorrosion coating, and the height-diameter ratio of the barrel is 2.5-3.5:

1.

7. The calcium carbonate slurry solid-liquid separation apparatus of claim 1, wherein, The upper part of the barrel is provided with a clear liquid outlet, and the clear liquid outlet is connected with a precision filter with a pore size of less than or equal to 10 mu m.

8. The calcium carbonate slurry solid-liquid separation apparatus of claim 1, wherein, The expansion joint is fixed to the central position in the barrel through a support frame, and the expansion joint is located in the T-shaped annular discharge port.

9. The calcium carbonate slurry solid-liquid separation apparatus of claim 1, wherein, The slurry inlet is arranged on the side wall of the top of the barrel, and the slurry treatment concentration in the barrel is 1-6%.

10. The calcium carbonate slurry solid-liquid separation apparatus of claim 1, wherein, The barrel is fixed through a support.

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