CN211871396U

CN211871396U - Calcium carbonate carbonization and drying device

Info

Publication number: CN211871396U
Application number: CN202020102858.XU
Authority: CN
Inventors: 王绍彬; 陈强
Original assignee: Sichuan Jiangyou Shaobin Mining Co ltd
Current assignee: Sichuan Jiangyou Shaobin Mining Co ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-11-06
Anticipated expiration: 2030-01-17

Abstract

A calcium carbonate carbonizing and drying apparatus comprising: the retort, retort bottom axle swing joint (mixing) shaft, a plurality of stirring rakes are connected on the (mixing) shaft top, annular intake pipe has been laid between stirring rake and the retort bottom, a plurality of gas outlets have been seted up in the intake pipe, the intake pipe communicates with the carbon dioxide machine of locating the retort outside, the discharging pipe is seted up to the retort bottom, be equipped with the valve on the discharging pipe, discharging pipe bottom intercommunication conveyer pipe, be equipped with the hob of transported substance in the conveyer pipe, the drive shaft of hob passes conveyer pipe tip and is connected with conveying motor, the outside cover of conveyer pipe is equipped with the hot plate. The utility model discloses let in carbon dioxide gas when utilizing the stirring rake to the calcium hydroxide stirring and generate calcium carbonate, the calcium carbonate thick liquids produce the depolymerization under the hob promotes to utilize the hot plate to heat calcium carbonate, make the inside a small amount of moisture vaporization of calcium carbonate, reach dry purpose.

Description

Calcium carbonate carbonization and drying device

Technical Field

The utility model relates to a calcium carbonate production technical field, it is relevant with a calcium carbonate carbonization and drying device very much.

Background

Calcium carbonate is an inorganic compound, and has been widely used in industries such as paper making, plastics, coatings, paints, foods, and the like, in addition to being an important building material. The production process of the calcium carbonate comprises the following steps: 1, calcining a limestone raw material to obtain calcium oxide and kiln gas carbon dioxide; 2 digesting calcium oxide, crushing the generated suspended calcium hydroxide under the action of high shear force, performing multi-stage hydrocyclone separation, and removing particles and impurities to obtain a refined calcium hydroxide suspension with a certain concentration; 3 introducing carbon dioxide gas for carbonization, adjusting the pH value, adding a proper additive to control the crystal form, and carbonizing to the end point to obtain calcium carbonate slurry of the required crystal form; 4 dehydrating, drying and surface treating the slurry to obtain the required light calcium carbonate product. Among them, carbonization is a key step in the production process of calcium carbonate, and directly affects the final quality of the product.

The existing calcium carbonate carbonization process mostly adopts manual operation, calcium hydroxide is poured into a carbonization tank, carbon dioxide gas is introduced in the manual stirring process, the stirring force is small, the sufficient reaction of the calcium hydroxide and the carbon dioxide is difficult to ensure, the calcium carbonate needs to be transferred out of the carbonization tank and calcium carbonate aggregates are depolymerized after the carbonization is finished, hot air is introduced to dry the depolymerized calcium carbonate particles, and multiple equipment is needed to be matched and the quality standard is difficult to control.

SUMMERY OF THE UTILITY MODEL

The problem to relevant prior art exists, the utility model provides a calcium carbonate carbonization and drying device utilizes the stirring rake to let in carbon dioxide gas when the calcium hydroxide stirring and generate calcium carbonate, and the calcium carbonate thick liquids produces the depolymerization under the hob promotes to utilize the hot plate to heat calcium carbonate, make the inside a small amount of moisture vaporization of calcium carbonate, reach dry purpose.

In order to achieve the above purpose, the utility model adopts the following technology:

a calcium carbonate carbonizing and drying apparatus comprising: the retort, retort bottom axle swing joint (mixing) shaft, a plurality of stirring rakes are connected on the (mixing) shaft top, annular intake pipe has been laid between stirring rake and the retort bottom, a plurality of gas outlets have been seted up in the intake pipe, the intake pipe communicates with the carbon dioxide machine of locating the retort outside, the discharging pipe is seted up to the retort bottom, be equipped with the valve on the discharging pipe, discharging pipe bottom intercommunication conveyer pipe, be equipped with the hob of transported substance in the conveyer pipe, the drive shaft of hob passes conveyer pipe tip and is connected with conveying motor, the outside cover of conveyer pipe is equipped with the hot plate.

Furthermore, the bottom end of the stirring shaft is connected with a stirring motor, and a sealing ring is arranged at the joint of the stirring shaft and the carbonization tank.

Further, the air inlet pipe is fixed at the bottom of the carbonization tank through a plurality of support frames.

Further, a pH meter is arranged at the bottom of the side wall of the carbonization tank, and a probe of the pH meter is arranged inside the carbonization tank.

Furthermore, the side wall of the carbonization tank is provided with an observation window.

Furthermore, a cover body is arranged at the top of the carbonization tank, and a rubber ring is arranged at the connection and matching position of the cover body and the carbonization tank.

The utility model discloses beneficial effect:

1. during carbonization, carbon dioxide gas is introduced into the calcium hydroxide while the calcium hydroxide is stirred by the stirring paddle to generate calcium carbonate, the pH value is detected, a valve is opened after aging when the carbonization end point is reached, calcium carbonate slurry is depolymerized under the pushing of the screw rod, and the calcium carbonate is heated by the heating plate, so that a small amount of water in the calcium carbonate is vaporized, and the aim of drying is fulfilled.

2. Through the rotation of agitator motor control (mixing) shaft, can keep stirring speed's even, prevent that liquid from splashing, the sealing ring that (mixing) shaft and carbonization jar junction set up can prevent the interior liquid seepage of carbonization jar, improve equipment sealing performance.

3. Utilize the support frame to connect intake pipe and carbonization tank bottom, can support the intake pipe on the one hand, on the other hand can prevent to cause the intake pipe not hard up when liquid rotates in the carbonization tank, improve equipment stability.

4. When carbon dioxide is introduced into the calcium hydroxide, the pH value is monitored at any time by utilizing a pH meter, so that excessive or insufficient introduction of the carbon dioxide is prevented, and the product quality is ensured.

Drawings

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

Fig. 2 is a schematic view of the venting mechanism of fig. 1.

Fig. 3 is a diagram of the conveyor of fig. 1.

Fig. 4 is a diagram of the stirrer mechanism of fig. 1.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 4, a calcium carbonate carbonizing and drying apparatus includes:

carbonization tank

1, 2 tops of (mixing) shaft of carbonization tank 1 bottom shaft dynamic connection connect a plurality of stirring rake 201, annular intake pipe 3 has been laid between stirring rake 201 and carbonization tank 1 bottom, a plurality of gas outlets 301 have been seted up on the intake pipe 3, intake pipe 3 and the carbon dioxide machine 302 intercommunication of locating carbonization tank 1 outside, discharging pipe 4 has been seted up to carbonization tank 1 bottom, be equipped with valve 401 on the

discharging pipe

4, 4 bottom intercommunication conveyer pipes 5 of discharging pipe, be equipped with hob 501 in the conveyer pipe 5, hob 501's drive shaft 502 passes conveyer pipe 5 tip and is connected with conveying motor 503, the outside cover of conveyer pipe 5 is equipped with hot plate 6.

The working mode is as follows: during carbonization, calcium hydroxide is poured into the carbonization tank 1, the stirring paddle 201 is driven to rotate through the stirring shaft 2, carbon dioxide gas is generated through the carbon dioxide machine 302 while the calcium hydroxide is stirred, the carbon dioxide enters the air inlet pipe 3 and is introduced into the calcium hydroxide through the air outlet 301 to react to generate calcium carbonate, the pH value is detected when the carbon dioxide is introduced, the carbon dioxide gas is stopped being introduced when the carbonization end point is reached, the valve 401 is opened after aging for a period of time, the calcium carbonate slurry enters the conveying pipe 5 through the discharge pipe 4, the aggregate is depolymerized under the push of the spiral rod 501, the calcium carbonate is heated by controlling the temperature of the heating plate 6, and a small amount of water in the calcium carbonate is vaporized after the calcium carbonate is discharged from the conveying pipe.

Preferably, the bottom end of the stirring shaft 2 is connected with the stirring motor 202, the joint of the stirring shaft 2 and the carbonization tank 1 is provided with the sealing ring 203, and the air inlet pipe 3 is fixed at the bottom of the carbonization tank 1 through a plurality of supporting frames 303.

The working mode is as follows: the rotation of the stirring shaft 2 is controlled by the stirring motor 202, the stirring speed can be kept uniform, the liquid can be prevented from splashing, the liquid in the carbonization tank 1 can be prevented from leaking by arranging the sealing ring 203 at the joint of the stirring shaft 2 and the carbonization tank 1, and the sealing performance of the equipment is improved; utilize support frame 303 to connect intake pipe 3 and carbonization jar 1 bottom, can support intake pipe 3 on the one hand, on the other hand can prevent to cause intake pipe 3 not hard up when liquid rotates in the carbonization jar 1, improve equipment stability.

In a further preferred embodiment of the present invention, the probe of the pH meter 7 provided at the bottom of the side wall of the carbonation tank 1 is provided inside the carbonation tank 1, the lid 101 is provided at the top of the carbonation tank 1, and the rubber ring 102 is provided at the joint between the lid 101 and the carbonation tank 1.

The working mode is as follows: when carbon dioxide is introduced into the calcium hydroxide, the pH value is monitored at any time by using a pH meter 7, so that excessive or insufficient introduction of the carbon dioxide is prevented, and the product quality is ensured; but impurity gets into carbonization jar 1 through lid 101 in the air and influences product purity, utilizes rubber circle 102 can keep carbonization jar 1 inside and external isolation, reduces the carbon dioxide loss, reduction in production cost.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it is obvious that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A calcium carbonate carbonization and drying device is characterized by comprising: the bottom of the carbonization tank (1) is in shaft-driven connection with a stirring shaft (2), and the top end of the stirring shaft (2) is connected with a plurality of stirring paddles (201);

an annular air inlet pipe (3) is laid between the stirring paddle (201) and the bottom of the carbonization tank (1), a plurality of air outlets (301) are formed in the air inlet pipe (3), and the air inlet pipe (3) is communicated with a carbon dioxide machine (302) arranged outside the carbonization tank (1);

a discharge pipe (4) is arranged at the bottom of the carbonization tank (1), and a valve (401) is arranged on the discharge pipe (4);

the bottom end of the discharge pipe (4) is communicated with a conveying pipe (5), a screw rod (501) for conveying materials is arranged in the conveying pipe (5), and a driving shaft (502) of the screw rod (501) penetrates through the end part of the conveying pipe (5) and is connected with a conveying motor (503);

the heating plate (6) is sleeved outside the conveying pipe (5).

2. The calcium carbonate carbonizing and drying apparatus of claim 1, wherein: the bottom end of the stirring shaft (2) is connected with a stirring motor (202), and the joint of the stirring shaft (2) and the carbonization tank (1) is provided with a sealing ring (203).

3. The calcium carbonate carbonizing and drying apparatus of claim 1, wherein: the air inlet pipe (3) is fixed at the bottom of the carbonization tank (1) through a plurality of supporting frames (303).

4. The calcium carbonate carbonizing and drying apparatus of claim 1, wherein: the bottom of the side wall of the carbonization tank (1) is provided with a pH meter (7), and a probe of the pH meter (7) is arranged inside the carbonization tank (1).

5. The calcium carbonate carbonizing and drying apparatus of claim 1, wherein: an observation window (8) is arranged on the side wall of the carbonization tank (1).

6. The calcium carbonate carbonizing and drying apparatus of claim 1, wherein: the top of the carbonization tank (1) is provided with a cover body (101), and the joint of the cover body (101) and the carbonization tank (1) is provided with a rubber ring (102).