阅读说明：本技术 一种氟硅酸钙生产工艺 (Calcium fluosilicate production process ) 是由 王庄 王德勋 赵江 王浩宇 张家凯 于 2020-07-24 设计创作，主要内容包括：本发明公开了一种氟硅酸钙生产工艺,所述反应槽内设置有第一搅拌桨,第一转轴,第一转轴上设置有搅拌桨与第一驱动电机连接,反应槽下部连接有第一输送管,第一输送管与压滤机连接,压滤机底部的槽体连接有第二输送管,第二输送管连接有负压蒸发器,负压蒸发器连接蒸汽排出管,负压蒸发器下部连接有晶体排出管,晶体排出管与离心脱水机,离心脱水机连接有第三输送管,第三输送管连接旋风干燥器,旋风干燥器连接排料管；第一输送管、第二输送管、蒸汽排出管、晶体排出管、第三输送管、排料管上均设置有第一控制阀。实现了氟硅酸钙生产原料成本低、操作时间短、操作方便,提高了产品的生产产量。(The invention discloses a calcium fluosilicate production process, wherein a first stirring paddle and a first rotating shaft are arranged in a reaction tank, the first rotating shaft is provided with the stirring paddle and is connected with a first driving motor, the lower part of the reaction tank is connected with a first conveying pipe, the first conveying pipe is connected with a filter press, a tank body at the bottom of the filter press is connected with a second conveying pipe, the second conveying pipe is connected with a negative pressure evaporator, the negative pressure evaporator is connected with a steam discharge pipe, the lower part of the negative pressure evaporator is connected with a crystal discharge pipe, the crystal discharge pipe is connected with a centrifugal dehydrator, the centrifugal dehydrator is connected with a third conveying pipe, the third conveying pipe is connected with a cyclone drier, and the; the first conveying pipe, the second conveying pipe, the steam discharging pipe, the crystal discharging pipe, the third conveying pipe and the discharging pipe are all provided with first control valves. Realizes low cost of raw materials for producing calcium fluosilicate, short operation time and convenient operation, and improves the production yield of products.)

1. The utility model provides a calcium fluosilicate apparatus for producing which characterized in that: the method comprises the following steps: the device comprises a reaction tank (1), a first stirring paddle (2), a first driving motor (3), a first conveying pipe (4), a filter press (5), a second conveying pipe (6), a negative pressure evaporator (7), a steam discharge pipe (8), a crystal discharge pipe (9), a centrifugal dehydrator (10), a third conveying pipe (11), a cyclone dryer (12), a discharge pipe (13) and a first control valve (14);

a first rotating shaft (27) is arranged in the reaction tank (1), a stirring paddle (2) is arranged on the first rotating shaft (27), the first stirring paddle (2) is connected with a first driving motor (3), a first conveying pipe (4) is connected to the lower portion of the reaction tank (1), the first conveying pipe (4) is connected with a filter press (5), a second conveying pipe (6) is connected to a tank body at the bottom of the filter press (5), a negative pressure evaporator (7) is connected to the second conveying pipe (6), the negative pressure evaporator (7) is connected to a steam discharge pipe (8), a crystal discharge pipe (9) is connected to the lower portion of the negative pressure evaporator (7), the crystal discharge pipe (9) is connected with a centrifugal dehydrator (10), the centrifugal dehydrator (10) is connected with a third conveying pipe (11), the third conveying pipe (11) is connected with a cyclone dryer (12), and the cyclone dryer (12) is connected;

the first conveying pipe (4), the second conveying pipe (6), the steam discharge pipe (8), the crystal discharge pipe (9), the third conveying pipe (11) and the discharge pipe (13) are all provided with a first control valve (14).

2. The calcium fluosilicate production device of claim 1, wherein: be provided with first three-way valve (15) on first conveyer pipe (4), first conveyer pipe (4) set up through first three-way valve (15) and feed liquor pipe (16) intercommunication, agitator tank (17) are connected in feed liquor pipe (16), be provided with second pivot (28) in agitator tank (17), be provided with stirring rake (18) on second pivot (28), second pivot (28) are connected with second driving motor (19), inlet tube (20) are connected in agitator tank (17), circulating pipe (21) is connected to agitator tank (17) one side, be provided with water pump (22) on circulating pipe (21), circulating pipe (21) one end is provided with second three-way valve (23), circulating pipe (21) set up through second three-way valve (23) and inlet tube (20) intercommunication.

3. The calcium fluosilicate production device of claim 1, wherein: pH on-line detectors (24) are arranged in the reaction tank (1) and the stirring tank (17);

a Baume degree tester (25) is arranged in the negative pressure evaporator (7),

a temperature sensor (26) is arranged in the cyclone dryer (12).

4. A process for producing a calcium silicofluoride plant using the calcium silicofluoride according to any one of claims 1 to 3, characterized in that: the method comprises the following steps:

raw material A: one of calcium carbonate, calcium oxide and calcium hydroxide is selected to react with fluosilicic acid and then put into a reaction tank (1) for reaction;

b, a production process flow: a first stirring paddle (2) is used for stirring reaction in a reaction tank (1), a pH value in the reaction tank (1) is monitored by a pH online detector (24), a reaction solution in the reaction tank (1) enters a filter press (5) through a first conveying pipe (4), filtrate subjected to filter pressing by the filter press (5) is subjected to negative pressure evaporation through a negative pressure evaporator (7) to generate a water-containing crystal, the water-containing crystal enters the negative pressure evaporator (7) through a second conveying pipe (6), water vapor in the negative pressure evaporator (7) is discharged through a vapor discharge pipe (8), the water-containing crystal in the negative pressure evaporator (7) is subjected to moisture reduction and then enters a cyclone dryer (12) for cyclone drying, and a product subjected to cyclone drying is subjected to moisture content detection;

c, collecting: and packaging the detected product.

5. The process for producing calcium fluosilicate according to claim 4, wherein: in the step A, calcium carbonate, calcium oxide and calcium hydroxide are not powdered during reaction.

6. The process for producing calcium fluosilicate according to claim 4, wherein: in the step B, filter residue after filter pressing of the filter press (5) is shaken down on the filter cloth of the filter press (5), the filter residue that is shaken down enters into the stirring tank (17), water enters into the stirring tank (17) through the water inlet pipe (20), lime slurry is added into the stirring tank (17), the pH value in the stirring tank (17) is monitored by the pH online detector (24), the second stirring paddle (18) is stirred in the stirring tank (17), the filter press (5) carries out filter pressing, and the water of filter pressing enters into the stirring tank (17) through the circulating pipe (21).

7. The process for producing calcium fluosilicate according to claim 4, wherein: and in the step B, the solution in the negative pressure evaporator (7) is subjected to baume degree testing by a baume degree tester (25).

8. The process for producing calcium fluosilicate according to claim 4, wherein: in the step B, the reaction time of the cyclone dryer (12) is 1-4min, and the temperature sensor (26) detects the reaction temperature in the cyclone dryer (12), wherein the reaction temperature is lower than 80 ℃.

9. The process for producing calcium fluosilicate according to claim 4, wherein: and in the step B, detecting the water content of the product subjected to cyclone drying, wherein the water content of the crystal is less than 0.5%.

10. The process for producing calcium fluosilicate according to claim 4, wherein: in the step B, the pH in the reaction tank (1) is = 4-6;

the pH in the stirred tank (17) is greater than 8.

Technical Field

The invention relates to the technical field of calcium fluosilicate production, and particularly relates to a production process of calcium fluosilicate.

Background

Calcium fluorosilicate is a chemical used as floatation agent, pesticide, etc. Appearance and properties: white crystalline powder. Relative density (water = 1): 2.66(17.5 ℃) solubility: is insoluble in water.

When the calcium fluosilicate is prepared, the quality of the prepared calcium fluosilicate is influenced by the selection of production raw materials and processes and the control of process conditions. Therefore, a production process of calcium fluosilicate is provided.

Disclosure of Invention

The invention aims to provide a production process of calcium fluosilicate, which realizes low cost of raw materials for producing the calcium fluosilicate, short operation time and convenient operation and improves the production yield of products.

In order to solve the technical problems, the invention adopts the following technical scheme:

a calcium fluosilicate production device comprises: the device comprises a reaction tank, a first stirring paddle, a first driving motor, a first conveying pipe, a filter press, a second conveying pipe, a negative pressure evaporator, a steam discharge pipe, a crystal discharge pipe, a centrifugal dehydrator, a third conveying pipe, a cyclone dryer, a discharge pipe and a first control valve;

a first stirring paddle is arranged in the reaction tank, a first rotating shaft is arranged on the first rotating shaft, the stirring paddle is connected with a first driving motor, the lower portion of the reaction tank is connected with a first conveying pipe, the first conveying pipe is connected with a filter press, a tank body at the bottom of the filter press is connected with a second conveying pipe, the second conveying pipe is connected with a negative pressure evaporator, the negative pressure evaporator is connected with a steam discharge pipe, the lower portion of the negative pressure evaporator is connected with a crystal discharge pipe, the crystal discharge pipe is connected with a centrifugal dehydrator, the centrifugal dehydrator is connected with a third conveying pipe, the third conveying pipe is connected with a cyclone dryer, and the cyclone;

the first conveying pipe, the second conveying pipe, the steam discharging pipe, the crystal discharging pipe, the third conveying pipe and the discharging pipe are all provided with first control valves.

Further, the method comprises the following steps of; be provided with first three-way valve on the first conveyer pipe, first conveyer pipe sets up through first three-way valve and feed liquor pipe intercommunication, feed liquor union coupling stirred tank, be provided with the second pivot in the stirred tank, be provided with the stirring rake in the second pivot, the second pivot is connected with second driving motor, the inlet tube is connected to the stirred tank, stirred tank one side connection circulating pipe is provided with the water pump on the circulating pipe, circulating pipe one end is provided with the second three-way valve, the circulating pipe passes through the second three-way valve and the setting of inlet tube intercommunication.

Further, the method comprises the following steps of; pH on-line detectors are arranged in the reaction tank and the stirring tank;

a baume degree tester is arranged in the negative pressure evaporator,

a temperature sensor is arranged in the cyclone dryer.

Further, the method comprises the following steps of; the method comprises the following steps:

raw material A: selecting one of calcium carbonate, calcium oxide and calcium hydroxide to react with fluosilicic acid and putting the mixture into a reaction tank for reaction;

b, a production process flow: the first stirring paddle is used for stirring and reacting the reaction tank, the pH value in the reaction tank is monitored by the pH online detector, a reaction solution in the reaction tank enters the filter press through the first conveying pipe, filtrate subjected to filter pressing by the filter press is subjected to negative pressure evaporation through the negative pressure evaporator to generate a water-containing crystal, the water-containing crystal enters the negative pressure evaporator through the second conveying pipe, water vapor in the negative pressure evaporator is discharged through the steam discharge pipe, the water-containing crystal in the negative pressure evaporator is subjected to cyclone drying after moisture in the water-containing crystal is reduced, and a product subjected to cyclone drying is subjected to moisture content detection;

c, collecting: and packaging the detected product.

Further, the method comprises the following steps of; in the step A, calcium carbonate, calcium oxide and calcium hydroxide are not powdered during reaction.

Further, the method comprises the following steps of; and in the step B, shaking down the filter residue after filter pressing by the filter press from the filter cloth of the filter press, enabling the shaken filter residue to enter into the stirring tank, feeding water into the stirring tank through the water inlet pipe, adding lime slurry into the stirring tank, monitoring the pH value in the stirring tank by the pH online detector, stirring by a second stirring paddle in the stirring tank, carrying out filter pressing by the filter press, and enabling the filter-pressed water to enter into the stirring tank through the circulating pipe.

Further, the method comprises the following steps of; and in the step B, the solution in the negative pressure evaporator is subjected to baume degree tester to detect the baume degree.

Further, the method comprises the following steps of; in the step B, the reaction time of the cyclone dryer is 1-4min, a temperature sensor detects the reaction temperature in the cyclone dryer, and the reaction temperature is lower than 80 ℃.

Further, the method comprises the following steps of; and in the step B, detecting the water content of the product subjected to cyclone drying, wherein the water content of the crystal is less than 0.5%.

Further, the method comprises the following steps of; in the step B, the pH in the reaction tank is = 4-6;

the pH in the stirred tank is greater than 8.

Compared with the prior art, the invention has at least one of the following beneficial effects:

1. realizes low cost of raw materials for producing calcium fluosilicate, short operation time and convenient operation, and improves the production yield of products.

2. The control of the acid environment in the reaction environment of the reaction tank is convenient for the reaction, the solid-liquid reaction is realized, no water is added, the generation of by-products is reduced, and the evaporated water is less.

3. Washing the filter residue with water, adding water and then adding lime slurry, wherein the filter residue after filter pressing of the filter press meets the requirement of common solid wastes, and the environmental hazard is reduced.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

In the figure: reaction tank (1), first stirring rake (2), first driving motor (3), first conveyer pipe (4), pressure filter (5), second conveyer pipe (6), negative pressure evaporator (7), steam discharging pipe (8), crystal discharging pipe (9), centrifugal dehydrator (10), third conveyer pipe (11), cyclone drier (12), row material pipe (13), first control valve (14), first three-way valve (15), feed liquor pipe (16), stirred tank (17), second stirring rake (18), second driving motor (19), inlet tube (20), circulating pipe (21), water pump (22), second three-way valve (23), pH on-line detector (24), baume degree tester (25), temperature sensor (26), first pivot (27), second pivot (28).

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments, as shown in fig. 1. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.