Preparation method of high-activity calcium hydroxide

Abstract

The invention relates to the technical field of preparation methods of high-activity calcium hydroxide, and discloses a preparation method of high-activity calcium hydroxide. A specially-made preparation device matched with the preparation method is adopted, the preparation device comprises an adjustable supporting leg, a preparation outer cabin is fixedly arranged on the adjustable supporting leg, and the adjustable supporting leg is fixedly connected with the preparation outer cabin; a sealed container is arranged in the preparation outer cabin, a conveying pipe shaft communicated with the sealed container is further arranged in the preparation outer cabin, a raw material adding branch pipe is fixedly welded to the side edge of the conveying pipe shaft, and the raw material adding branch pipe is communicated with the conveying pipe shaft and used for adding raw materials for preparing calcium hydroxide; in addition, the high-activity calcium hydroxide preparation support is further provided with a driving motor used for driving a stirring shaft rotationally arranged in the preparation outer cabin. According to the invention, high-concentration oxygen can be mixed with raw materials in a temperature range through the ultrasonic generator, so that the activity of calcium hydroxide is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of preparation methods of highly active calcium hydroxide, in particular to a preparation method of highly active calcium hydroxide. Background Art

[0002] With the increasingly stringent environmental protection requirements, higher requirements have been put forward for the emission of acid pollutants in flue gas from industries such as coking, metallurgy, gas, and industrial silicon. Since most of these industries have low emissions of acidic substances such as SO2, the conventional wet and semi-dry desulfurization methods can achieve the purpose, but the construction cost and operation cost are relatively high and the economic efficiency is poor. Therefore, the dry desulfurization process has been widely welcomed.

[0003] At present, the commonly used dry desulfurization absorbents include sodium bicarbonate and calcium hydroxide. Among them, sodium bicarbonate has a high desulfurization efficiency within a certain temperature range, but it has the disadvantage that the by-products are difficult to use and handle; although the by-products of ordinary calcium-based absorbents are relatively easy to handle, they have the disadvantages of relatively low desulfurization efficiency and excessive dosage. Therefore, the modification and efficiency improvement of calcium-based absorbents to replace sodium bicarbonate dry desulfurization have gradually attracted widespread attention, and the industry desulfurization market demand is strong.

[0004] In the currently disclosed invention patents for calcium-based desulfurization and deacidification, such as Patent Document 1: "A flue gas dry desulfurizer and its preparation method" (Application Publication No. CN115400578A), the technology of using slaked lime doped with various inorganic salts, such as sodium silicate, sodium sulfate, calcium nitrate and other leavening agents, can achieve the improvement of desulfurization efficiency; Patent Document 2: "A method for preparing slaked lime for high-efficiency desulfurization" (Application Publication No. CN115073023A), an improved pre-digester and crushing device are used to increase the specific surface area of ​​slaked lime; Patent Document 3: "A method for preparing raw materials for calcium-based SDS desulfurization process" (Application Publication No. CN115430272A), through the steps of calcining calcium carbonate, coating with a coating agent, hydration treatment, aging and drying treatment, the final calcium hydroxide material particles have the effects of high specific surface area, high dispersibility, high desulfurization efficiency and the like. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in order to overcome the above problems, a method for preparing highly active calcium hydroxide is provided, which solves the above problems.

[0006] The present invention solves the technical problem by adopting the following technical solutions:

[0007] A method for preparing highly active calcium hydroxide comprises adopting a special preparation device matched with the preparation method, wherein the preparation device comprises an adjustable support foot, a preparation outer chamber is fixedly provided on the adjustable support foot, a sealed container is provided in the preparation outer chamber, and a delivery pipe shaft connected to the sealed container is also provided, a raw material adding branch pipe is welded and fixed on the side of the delivery pipe shaft, the raw material adding branch pipe is connected to the delivery pipe shaft for adding raw materials for preparing calcium hydroxide, and a driving motor for driving and rotating a stirring shaft arranged in the preparation outer chamber is also provided on the highly active calcium hydroxide preparation support, the driving motor drives the stirring shaft after reducing speed through a worm gear, and an oxygen supply main pipe is fixed and connected to the other side of the preparation outer chamber.

[0008] In one embodiment, the oxygen supply main pipe is supported by a delivery pipe shaft support frame fixed on the high-activity calcium hydroxide preparation bracket. In addition, an oxygen supply pipe is welded and connected to the oxygen supply main pipe, and the oxygen supply pipe is used to inject oxygen into the preparation outer cabin.

[0009] In one embodiment, a coupling bracket is fixedly provided on the high-activity calcium hydroxide preparation bracket for supporting the driving motor.

[0010] In one embodiment, an inner mounting frame and a constant temperature insulation cylinder are fixedly provided in the preparation outer cabin, and the inner mounting frame and the constant temperature insulation cylinder have the same thickness.

[0011] In one embodiment, an electric heating radiator is fixedly provided in the interlayer between the outer preparation chamber and the constant temperature insulation cylinder, and the electric heating radiator is used to maintain the temperature inside the outer preparation chamber.

[0012] In one embodiment, movable wheels are fixed by bolts at the four corners of the lower end of the high-activity calcium hydroxide preparation bracket to facilitate displacement.

[0013] In one embodiment, an ultrasonic generator with both ends inserted on the inner mounting frame is fixedly installed in the constant temperature insulation cylinder, and a spiral stirrer is also rotatably installed in the constant temperature insulation cylinder.

[0014] In one embodiment, a hinged hatch cover is hingedly provided on the preparation outer cabin through a hinge joint for covering the preparation outer cabin, and an angle limiting bracket for supporting the hinged hatch cover is fixedly provided on the preparation outer cabin, and a protective cover plate is fixedly provided on the upper end of the hinged hatch cover.

[0015] In one embodiment, a method for preparing highly active calcium hydroxide comprises first adding raw materials into the preparation outer chamber through a raw material adding branch pipe, then controlling the internal temperature of the preparation outer chamber between one hundred and sixty degrees Celsius and one hundred and eighty degrees Celsius under the action of the electric heating radiator, then delivering oxygen through the oxygen supply main pipe under the high-frequency vibration of the ultrasonic generator to quickly mix with the raw materials, and the prepared calcium hydroxide is pushed out from the end of the oxygen supply main pipe through the spiral agitator.

[0016] The advantages and positive effects of the present invention are: high-concentration oxygen can be mixed with raw materials within a temperature range through an ultrasonic generator, thereby greatly improving the activity of calcium hydroxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0023] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0024] like Figure 1-3As shown, a method for preparing highly active calcium hydroxide according to the present invention comprises adopting a special preparation device matched with the preparation method, wherein the preparation device comprises an adjustable support foot 11, a preparation outer chamber 15 is fixedly provided on the adjustable support foot 11, a sealed container is provided in the preparation outer chamber 15, and a delivery pipe shaft 31 connected to the sealed container is also provided, a raw material addition branch pipe 21 is welded and fixed on the side of the delivery pipe shaft 31, the raw material addition branch pipe 21 is connected to the delivery pipe shaft 31 for adding raw materials for preparing calcium hydroxide, and a drive motor 23 for driving and rotating a stirring shaft arranged in the preparation outer chamber 15 is also provided on the highly active calcium hydroxide preparation bracket 10, the drive motor 23 drives the stirring shaft after reducing speed through a worm gear, and an oxygen supply main pipe 13 is fixed and connected on the other side of the preparation outer chamber 15.

[0025] In one embodiment, the oxygen supply main pipe 13 is supported by a conveying pipe shaft support frame 12 fixed on the high-activity calcium hydroxide preparation bracket 10. In addition, an oxygen supply pipe 14 is welded and connected to the oxygen supply main pipe 13, and the oxygen supply pipe 14 is used to inject oxygen into the preparation outer chamber 15.

[0026] In one embodiment, a coupling bracket 25 is fixedly provided on the high-activity calcium hydroxide preparation bracket 10 for supporting the driving motor 23 .

[0027] In one embodiment, an inner mounting frame 16 and a constant temperature insulation cylinder 19 are fixedly provided in the preparation outer chamber 15, and the inner mounting frame 16 and the constant temperature insulation cylinder 19 have the same thickness.

[0028] In one embodiment, an electric heat radiator 20 is fixedly provided in the interlayer between the preparation outer chamber 15 and the constant temperature insulation cylinder 19 , and the electric heat radiator 20 is used to maintain the temperature inside the preparation outer chamber 15 .

[0029] In one embodiment, movable wheels 26 are fixed by bolts at the four corners of the lower end of the high-activity calcium hydroxide preparation bracket 10 for easy displacement.

[0030] In one embodiment, an ultrasonic generator 17 with both ends inserted on the inner mounting frame 16 is fixedly installed in the constant temperature insulation cylinder 19 , and a spiral stirrer 18 is also rotatably installed in the constant temperature insulation cylinder 19 .

[0031] In one embodiment, a hinged hatch cover 27 is hingedly provided on the preparation outer cabin 15 through a hinge joint 29 for covering the preparation outer cabin 15, and an angle limiting bracket 30 for supporting the hinged hatch cover 27 is fixedly provided on the preparation outer cabin 15, and a protective cover plate 28 is fixedly provided on the upper end of the hinged hatch cover 27.

[0032] In one embodiment, a method for preparing highly active calcium hydroxide comprises first adding raw materials into the preparation outer chamber 15 through the raw material adding branch pipe 21, then controlling the internal temperature of the preparation outer chamber 15 between 160 and 180 degrees Celsius under the action of the electric heating radiator 20, and then delivering oxygen through the oxygen supply main pipe 13 under the high frequency vibration of the ultrasonic generator 17 to quickly mix with the raw materials, and the prepared calcium hydroxide is pushed out from the end of the oxygen supply main pipe 13 through the spiral agitator 18.

[0033] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive, and therefore the present invention is not limited to the embodiments described in the specific implementation manners. Any other implementation manners derived by those skilled in the art based on the technical solutions of the present invention also fall within the scope of protection of the present invention.

Claims

1. A method for preparing highly active calcium hydroxide, characterized in that: The invention comprises a special preparation device for use with the preparation method, wherein the preparation device comprises an adjustable support foot (11), a preparation outer chamber (15) is fixedly provided on the adjustable support foot (11), a sealed container is provided in the preparation outer chamber (15), and a delivery pipe shaft (31) connected to the sealed container is also provided, a raw material addition branch pipe (21) is welded and fixedly provided on the side of the delivery pipe shaft (31), the raw material addition branch pipe (21) is connected to the delivery pipe shaft (31) for adding raw materials for preparing calcium hydroxide, and a driving motor (23) for driving and rotating a stirring shaft arranged in the preparation outer chamber (15) is also provided on the high-activity calcium hydroxide preparation bracket (10), and the driving motor (23) drives the stirring shaft after reducing the speed through a worm gear, and an oxygen supply main pipe (13) is fixed and connected to the other side of the preparation outer chamber (15).

2. A method for preparing highly active calcium hydroxide according to claim 1, characterized in that: The oxygen supply main pipe (13) is supported by a conveying pipe shaft support frame (12) fixed on the high-activity calcium hydroxide preparation support (10). In addition, an oxygen supply pipe (14) is welded and connected to the oxygen supply main pipe (13). The oxygen supply pipe (14) is used to inject oxygen into the preparation outer cabin (15).

3. A method for preparing a highly active calcium hydroxide according to claim 2, characterized in that: A coupling bracket (25) is also fixedly provided on the high-activity calcium hydroxide preparation bracket (10) for supporting the driving motor (23).

4. A method for preparing a highly active calcium hydroxide according to claim 3, characterized in that: An inner mounting frame (16) and a constant temperature insulation cylinder (19) are fixedly arranged in the preparation outer chamber (15), and the inner mounting frame (16) and the constant temperature insulation cylinder (19) have the same thickness.

5. A method for preparing a highly active calcium hydroxide according to claim 4, characterized in that: An electric heat radiator (20) is fixedly arranged in the interlayer between the preparation outer chamber (15) and the constant temperature insulation cylinder (19), and the electric heat radiator (20) is used to maintain the temperature inside the preparation outer chamber (15).

6. A method for preparing highly active calcium hydroxide according to claim 5, characterized in that: Moving wheels (26) are also fixed by bolts at the four corners of the lower end of the high-activity calcium hydroxide preparation bracket (10) to facilitate displacement.

7. A method for preparing highly active calcium hydroxide according to claim 6, characterized in that: An ultrasonic generator (17) with both ends inserted into the inner mounting frame (16) is fixedly arranged in the constant temperature insulation cylinder (19), and a spiral stirrer (18) is also rotatably arranged in the constant temperature insulation cylinder (19).

8. A method for preparing highly active calcium hydroxide according to claim 7, characterized in that: A hinged hatch cover (27) is hingedly provided on the preparation outer cabin (15) through a hinge joint (29) for covering the preparation outer cabin (15), and an angle limiting bracket (30) for supporting the hinged hatch cover (27) is fixedly provided on the preparation outer cabin (15), and a protective cover plate (28) is fixedly provided on the upper end of the hinged hatch cover (27).

9. A method for preparing a highly active calcium hydroxide according to claim 8, characterized in that: The method for preparing highly active calcium hydroxide comprises the following steps: firstly, adding raw materials into the preparation outer chamber (15) through the raw material adding branch pipe (21); then, under the action of the electric heating radiator (20), controlling the internal temperature of the preparation outer chamber (15) between 160 and 180 degrees Celsius; then, under the high frequency vibration of the ultrasonic generator (17), oxygen is introduced through the oxygen supply main pipe (13) to be quickly mixed with the raw materials; and the prepared calcium hydroxide is pushed out from the end of the oxygen supply main pipe (13) through the spiral agitator (18).

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