Combined reaction kettle for preparing calcium chloride from calcium carbonate

Abstract

The utility model relates to a combined reaction kettle for preparing calcium chloride from calcium carbonate, which comprises a first reaction kettle body for reacting calcium carbonate with diluted hydrochloric acid to generate a calcium chloride solution and a second reaction kettle body for removing part of water in the calcium chloride solution, the liquid dispersing vertical pipe is communicated with the first reaction kettle body through a liquid transferring pipeline, and a plurality of nozzles for spraying out a calcium chloride solution in a fogdrop shape are arranged at the upper end of the liquid dispersing vertical pipe; an electric heating box for heating air is arranged on the second reaction kettle body, and is connected with a first fan and a hot air pipe for inputting hot air into the second reaction kettle body to remove part of water in the calcium chloride solution; a heating cavity is formed in the first reaction kettle body, and the heating cavity is communicated with the second reaction kettle body so as to input hot air into the second reaction kettle body to assist in removing part of water in the calcium chloride solution. According to the utility model, heat energy generated by exothermic reaction can be utilized to assist in removing part of water in the calcium chloride solution, so that the energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to calcium carbonate preparation calcium chloride technical equipment field, specifically speaking is a kind of calcium carbonate preparation calcium chloride's combined reaction kettle. BACKGROUND

[0002] The preparation method of calcium carbonate preparation calcium chloride is usually divided into two steps, the first step mixing method: through calcium carbonate and dilute hydrochloric acid according to proportion mixing occurs acid-base neutralization reaction to generate calcium chloride, water and carbon dioxide;Second step distillation method: through distillation method evaporates the remaining water to obtain anhydrous calcium chloride. Patent CN202021629445.3 discloses a kind of reaction kettle for preparing calcium chloride solution, it includes two reaction axe, the top of the reaction axe is fixedly installed with driving motor, the output shaft of the driving motor is fixedly installed with rotating rod, the outside of the rotating rod is fixedly installed with screw rotation stirring blade, the outside of the rotating rod is fixedly installed with connecting plate, the bottom of the connecting plate is fixedly installed with two fixed rods, the outside of the fixed rod is fixedly installed with stirring plate. The bottom of left side the reaction kettle is fixedly installed with liquid suction pipe, the bottom end of the liquid suction pipe is fixedly installed with medicine pump, the top of right side the reaction kettle is fixedly installed with air heater, the reaction kettle is concentrated calcium chloride solution by removing water in calcium chloride and water mixed solution generated by hot air of air heater, so as to facilitate subsequent processing to obtain calcium chloride powder.

[0003] However, the above-mentioned reaction kettle is through hot air blowing full right side reaction kettle to evaporate water to obtain calcium chloride solution, its evaporation process is time-consuming, and the efficiency is low, and calcium carbonate and dilute hydrochloric acid reaction belongs to exothermic reaction, the above-mentioned reaction kettle cannot utilize the huge heat generated by calcium carbonate and dilute hydrochloric acid exothermic reaction, causing great energy waste. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of combined reaction kettle for calcium carbonate preparation calcium chloride, can utilize the heat energy generated by exothermic reaction to assist to remove part of water in calcium chloride solution to obtain concentrated calcium chloride solution, reduce energy consumption.

[0005] In order to solve the above technical problems, the utility model adopts the specific scheme of a kind of combined reaction kettle for calcium carbonate preparation calcium chloride, including the first reaction kettle body for calcium carbonate and dilute hydrochloric acid reaction to generate calcium chloride solution and the second reaction kettle body for removing part of water in calcium chloride solution, a liquid dispersion vertical pipe is arranged in the second reaction kettle body, the liquid dispersion vertical pipe is communicated with the first reaction kettle body by pipette duct, a plurality of nozzles for spraying calcium chloride solution in the form of mist droplets are arranged on the outer periphery of the upper end of the liquid dispersion vertical pipe;Electric heating box for heating air is fixed on the second reaction kettle body, the electric heating box is connected with first fan and hot gas pipe, and the hot gas pipe is used to input hot air into the second reaction kettle body to remove part of water in calcium chloride solution.

[0006] The first reactor body is provided with a heating cavity, and the heating cavity is communicated with the second reactor body through an auxiliary hot air pipeline to input hot air into the second reactor body to assist in removing part of water in the calcium chloride solution.

[0007] As another optimization scheme of the combined reactor for preparing calcium chloride from calcium carbonate, a rotating shaft extending into the cavity of the first reactor body and a motor for driving the rotating shaft to rotate are arranged on the top of the first reactor body, and a plurality of stirring rods for uniformly mixing calcium carbonate and dilute hydrochloric acid are mounted on the lower end of the rotating shaft in the circumferential direction.

[0008] As another optimization scheme of the combined reactor for preparing calcium chloride from calcium carbonate, the plurality of stirring rods are composed of a plurality of long rods and short rods, the plurality of short rods are uniformly and spacedly arranged at the lower end of the rotating shaft, and the plurality of long rods are spacedly arranged above the plurality of short rods.

[0009] As another optimization scheme of the combined reactor for preparing calcium chloride from calcium carbonate, a gas collecting hood is arranged on the top of the second reactor body, the hot air pipe is communicated with the gas collecting hood, and a plurality of gas distribution ports are arranged in the gas collecting hood on the top of the second reactor body.

[0010] As another optimization scheme of the combined reactor for preparing calcium chloride from calcium carbonate, a hot air outlet is arranged on the second reactor body, and the hot air outlet is communicated with the first fan through a circulating pipeline.

[0011] As another optimization scheme of the combined reactor for preparing calcium chloride from calcium carbonate, the nozzle is arranged horizontally or inclined upward by 30-85°.

[0012] As another optimization scheme of the combined reactor for preparing calcium chloride from calcium carbonate, the pipette is connected with a material pump.

[0013] As another optimization scheme of the combined reactor for preparing calcium chloride from calcium carbonate, an air inlet for air entering the heating cavity is arranged on the first reactor body, and the air inlet is connected with the second fan through an air inlet pipeline.

[0014] As another optimization scheme of the combined reactor for preparing calcium chloride from calcium carbonate, a dilute hydrochloric acid conveying pipe for adding dilute hydrochloric acid solution and a feed inlet for adding calcium carbonate are arranged on the top of the first reactor body.

[0015] Compared with the prior art, the combined reactor for preparing calcium chloride from calcium carbonate has the following beneficial effects:

[0016] 1. The first reaction kettle body in the utility model can carry out acid-base neutralization exothermic reaction of calcium carbonate and dilute hydrochloric acid to obtain calcium chloride solution, the calcium chloride solution is passed into the liquid dispersion vertical pipe installed in the second reaction kettle body through the pipette pipeline, and is sprayed in the form of mist droplets through the nozzle arranged on the outer periphery of the upper end of the liquid dispersion vertical pipe, the electric heating box can pass the heated hot air into the second reaction kettle and remove part of the water in the mist droplet dispersed calcium chloride solution to obtain concentrated calcium chloride solution, the mist droplet calcium chloride solution is convenient for the hot air to remove the water in the solution, and the removal efficiency is improved. In addition, with the acid-base neutralization exothermic reaction, air enters the heating cavity, the heat generated by the exothermic reaction can diffuse in the heating cavity and heat the circulating air, and the heated air is discharged through the auxiliary hot air pipeline to the hot air heated by the auxiliary electric heating box in the second reaction kettle body to remove part of the water in the calcium chloride solution, and the auxiliary of the hot air passed through the heating cavity can reduce the energy consumption of the electric heating box to a certain extent.

[0017] 2. The shaft is rotatably arranged in the first reaction kettle body, the stirring rod short rod arranged at the lower end thereof can stir the calcium carbonate and dilute hydrochloric acid in a small range, and the long rod arranged on the shaft above the short rod is located at the periphery of the short rod and can stir the calcium carbonate and dilute hydrochloric acid in a large range, so that the calcium carbonate and dilute hydrochloric acid are uniformly mixed to accelerate the reaction process.

[0018] 3. The nozzle on the liquid dispersion vertical pipe is arranged horizontally or at an angle of 45° upward, which is convenient for forming counterflow or cross with the hot air vertically downward into the second reaction kettle body, increasing the contact between the mist droplet calcium chloride solution and the hot air, and facilitating the removal of part of the water in the calcium chloride solution to obtain concentrated calcium chloride solution. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the utility model;

[0020] Mark: 1, first reaction kettle body, 101, air inlet, 102, solution outlet, 103, air outlet, 104, feed inlet, 105, dilute hydrochloric acid conveying pipe, 2, second fan, 201, air inlet pipeline, 3, reaction heat conduction partition, 301, heating cavity, 4, shaft, 401, stirring rod, 5, pipette pipeline, 501, material pump, 6, second reaction kettle body, 601, auxiliary hot air pipeline, 602, gas collecting hood, 603, gas outlet, 604, hot air outlet, 605, calcium chloride outlet, 606, discharge valve, 7, electric heating box, 701, hot air pipe, 702, first fan, 8, liquid dispersion vertical pipe, 801, nozzle. DETAILED DESCRIPTION

[0021] The technical scheme of the utility model will be further described in detail in combination with specific embodiments. The parts not described in detail in the following embodiments of the utility model, such as heating air in the electric heating box and the temperature of the heated air, the nozzle spraying calcium chloride solution in the form of mist droplets, etc., are all the prior art known or should be known to the person skilled in the art.

[0022] A combined reaction kettle for preparing calcium chloride from calcium carbonate, as shown in the figure, comprises a first reaction kettle body 1 and a second reaction kettle body 6, the first reaction kettle body 1 is used for reacting calcium carbonate with dilute hydrochloric acid to generate calcium chloride solution, and the second reaction kettle body 6 is used for removing part of the water in the calcium chloride solution to obtain concentrated calcium chloride solution. Figure 1

[0023] A layer of reaction heat-conducting partition plate 3 is arranged in the first reaction kettle body 1, and a heating cavity 301 is formed between the reaction heat-conducting partition plate 3 and the inner side wall of the first reaction kettle body 1. A feeding port 104 is formed in the top of the first reaction kettle body 1, calcium carbonate can be put into the first reaction kettle body 1 from the feeding port 104, and a dilute hydrochloric acid conveying pipe 105 is vertically arranged on the left side of the top of the first reaction kettle body 1, the lower end of the dilute hydrochloric acid conveying pipe 105 extends into the lower part of the inner cavity of the first reaction kettle body 1, so as to convey dilute hydrochloric acid into the inner cavity and react with calcium carbonate.

[0024] An air inlet 101 is formed in the left side wall of the first reaction kettle body 1, the air inlet 101 is communicated with the heating cavity 301, a second fan 2 is arranged on the outer side wall of the first reaction kettle body 1, the second fan 2 is communicated with the air inlet 101 through an air inlet pipeline 201, and air is input into the heating cavity 301 through the air inlet pipeline 201.

[0025] The reaction of calcium carbonate and dilute hydrochloric acid is an exothermic reaction, the heat released by the reaction enters the heating cavity 301 through the reaction heat-conducting partition plate 3, so as to heat the air input into the heating cavity 301, an air outlet 103 is formed in the right side wall of the first reaction kettle body 1, the hot air flows into the second reaction kettle body 6 through the auxiliary hot air pipeline 601, so as to assist in removing part of the water in the calcium chloride solution.

[0026] A solution outlet 102 is formed in the bottom of the first reaction kettle body 1, the solution outlet 102 is used for flowing out the calcium chloride solution generated by the reaction of calcium carbonate and dilute hydrochloric acid, a solution inlet is formed in the bottom of the second reaction kettle body 6, the solution inlet is communicated with the solution outlet 102 through a pipetting pipeline 5, and the calcium chloride solution is conveyed to the second reaction kettle body 6 through the pipetting pipeline 5, in addition, the pipetting pipeline 5 is connected with a material pump 501.

[0027] ​A liquid dispersion vertical pipe 8 is arranged in the second reactor body 6 in the vertical direction, the upper end of the liquid dispersion vertical pipe 8 is sealed, and the lower end of the liquid dispersion vertical pipe 8 is communicated with the solution inlet. A plurality of nozzles 801 are uniformly and spacedly arranged on the outer periphery of the upper end of the liquid dispersion vertical pipe 8, and the plurality of nozzles 801 can spray the calcium chloride solution flowing into the liquid dispersion vertical pipe 8 into the cavity of the second reactor body 6 in the form of mist droplets.

[0028] An electric heating box 7 for heating air is fixedly installed on the right side wall of the second reactor body 6, an input port for air entering the box is formed on the lower side wall of the electric heating box 7, and an output port for heated hot air flowing out is formed on the upper side wall of the electric heating box 7. A first fan 702 is arranged below the electric heating box 7 on the right side wall of the second reactor body 6, the first fan 702 is fixed to the second reactor body 6 by a mounting bracket, the first fan 702 is communicated with the input port through a gas conveying pipeline, and the first fan 702 discharges air into the electric heating box 7 through the gas conveying pipeline for heating.

[0029] The electric heating element in the electric heating box 7 is a resistance wire, the air entering through the input port is heated to form hot air after passing through the resistance wire, and then the hot air is output through the output port, the output port of the electric heating box 7 is communicated with the second reactor body 6 through a hot gas pipe 701 to convey the hot air heated by the electric heating box 7 into the second reactor body 6. A gas collecting hood 602 is arranged on the top of the second reactor body 6, the top of the gas collecting hood 602 is communicated with the hot gas pipe 701, the left side of the gas collecting hood 602 is communicated with an auxiliary hot gas pipeline 601 arranged on the gas outlet 103 of the first reactor body 1, and the hot air heated by the heating cavity 301 can enter the gas collecting hood 602 to mix with the hot air heated by the electric heating box 7.

[0030] A plurality of gas distribution ports 603 are formed in the gas collecting hood 602 on the top of the second reactor body 6 for the mixed hot air to enter the second reactor body 6, the mixed hot air in the gas collecting hood 602 vertically enters the second reactor body 6 through the plurality of gas distribution ports 603, and after contacting the calcium chloride solution in the form of mist droplets and evaporating part of the water in the solution, the mixed hot air obtains concentrated calcium chloride solution.

[0031] Further, a hot air outlet 604 is formed in the right side wall of the second reactor body 6 below the first fan 702, the mixed hot air removing part of the water in the calcium chloride solution can flow out of the second reactor body 6 through the hot air outlet 604, in addition, the hot air outlet 604 is arranged below the first fan 702 and connected with the first fan 702 through a circulating pipeline, the first fan 702 circulates and sucks the hot air with a certain temperature discharged from the hot air outlet 604 into the electric heating box 7 for heating, which can save the energy consumption of the electric heating box 7 to a certain extent.

[0032] The concentrated calcium chloride solution is precipitated to the bottom of the second reactor body 6, and the bottom of the second reactor body 6 is provided with a discharge valve port 606 for discharging the calcium chloride solution. A through hole is formed in the side wall of the discharge valve port 606 to allow the transfer pipe 5 to pass through and communicate with the solution inlet. A plurality of calcium chloride outlets 605 are uniformly and spaced apart around the liquid dispersion vertical pipe 8 on the side wall of the bottom of the second reactor body 6. The concentrated calcium chloride solution falling to the bottom of the second reactor body 6 can be collected in the discharge valve port 606 through the calcium chloride outlets 605. The concentrated calcium chloride solution can be discharged by opening the discharge valve port 606.

[0033] Further, the plurality of nozzles 801 on the liquid dispersion vertical pipe 8 are staggered in a horizontal direction or an upward 45° direction, so that the calcium chloride solution in the form of mist droplets can form countercurrent or cross distribution with the hot air passing vertically downward into the second reactor body 6, increasing the contact between the calcium chloride solution in the form of mist droplets and the hot air, facilitating the removal of part of the water in the calcium chloride solution to obtain the concentrated calcium chloride solution.

[0034] Further, the first reactor body 1 is provided with a rotating shaft 4 extending into its inner cavity at the top, and the second reactor body 6 is provided with a motor for driving the rotating shaft 4 to rotate at the top. Six stirring rods 401 for mixing calcium carbonate and dilute hydrochloric acid are mounted on the lower end of the rotating shaft 4 in the circumferential direction. The six stirring rods 401 are composed of three long rods and three short rods. The three short rods are uniformly and spaced apart at the lower end of the rotating shaft 4, and the three long rods are uniformly and spaced apart on the outer circumference of the rotating shaft 4 above the three short rods and staggered with the short rods. The three short rods can stir the calcium carbonate and dilute hydrochloric acid in a small range, and the long rods located outside the short rods can stir the calcium carbonate and dilute hydrochloric acid in a large range, thereby uniformly mixing the calcium carbonate and dilute hydrochloric acid and accelerating the reaction process.

Claims

1. A combined reactor for preparing calcium chloride from calcium carbonate, comprising a first reactor body (1) for reacting calcium carbonate with dilute hydrochloric acid to produce a calcium chloride solution and a second reactor body (6) for removing part of the water from the calcium chloride solution, characterized in that: A liquid dispersion vertical pipe (8) is arranged in the second reactor body (6), the liquid dispersion vertical pipe (8) is communicated with the first reactor body (1) through the pipette pipe (5), a plurality of nozzles (801) for spraying calcium chloride solution in the form of mist are arranged on the outer periphery of the upper end of the liquid dispersion vertical pipe (8); The second reactor body (6) is fixed with an electric heating box (7) for heating air, the electric heating box (7) is connected with a first fan (702) and a hot air pipe (701), the hot air pipe (701) is used for inputting hot air into the second reactor body (6) to remove part of water in the calcium chloride solution; The first reactor body (1) is provided with a heating cavity (301) on the wall, the heating cavity (301) is communicated with the second reactor body (6) through an auxiliary hot air pipe (601) to input hot air into the second reactor body (6) to assist in removing part of water in the calcium chloride solution.

2. The combined reactor for preparing calcium chloride from calcium carbonate according to claim 1, characterized in that: A rotating shaft (4) extending into the cavity of the first reactor body (1) and a motor for driving the rotating shaft (4) to rotate are arranged on the top of the first reactor body (1), a plurality of stirring rods (401) for mixing calcium carbonate and dilute hydrochloric acid are mounted on the lower end of the rotating shaft (4) in the circumferential direction.

3. The combined reactor for the preparation of calcium chloride from calcium carbonate according to claim 2, characterized in that: The plurality of stirring rods (401) are composed of a plurality of long rods and short rods, the plurality of short rods are uniformly and spacedly arranged on the lower end of the rotating shaft (4), and the plurality of long rods are spacedly arranged above the plurality of short rods.

4. The combined reactor for preparing calcium chloride from calcium carbonate according to claim 1, characterized in that: A gas collecting hood (602) is arranged on the top of the second reactor body (6), the hot air pipe (701) is communicated with the gas collecting hood (602), and a plurality of gas distribution ports (603) are arranged on the top of the second reactor body (6) in the gas collecting hood (602).

5. The combined reactor for the preparation of calcium chloride from calcium carbonate according to claim 1, characterized in that: A hot air outlet (604) is arranged on the second reactor body, and the hot air outlet (604) is communicated with the first fan (702) through a circulation pipe.

6. The combined reactor for the preparation of calcium chloride from calcium carbonate according to claim 1, characterized in that: The nozzles (801) are arranged horizontally or inclined upward by 30-85°.

7. The combined reactor for the preparation of calcium chloride from calcium carbonate according to claim 1, characterized in that: The pipette pipe (5) is connected with a material pump (501).

8. The combined reactor for the preparation of calcium chloride from calcium carbonate according to claim 1, characterized in that: An air inlet (101) for air entering the heating cavity (701) is arranged on the first reactor body (1), and the air inlet (101) is connected with a second fan (2) through an air inlet pipe (201).

9. The combined reactor for the preparation of calcium chloride from calcium carbonate according to claim 1, characterized in that: A dilute hydrochloric acid conveying pipe (105) for adding dilute hydrochloric acid solution and a feed inlet (104) for adding calcium carbonate are arranged on the top of the first reactor body (1).

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