Continuous carbonization reaction equipment for nano calcium carbonate

Abstract

The utility model relates to the technical field of carbonization reaction equipment, and discloses nano calcium carbonate continuous carbonization reaction equipment which comprises a reaction mechanism, and a temperature control mechanism is arranged at the bottom end of the reaction mechanism. According to the continuous carbonization reaction equipment for the nano calcium carbonate, a calcium hydroxide solution is input through the liquid conveying pipe and atomized through the atomizing spray head, carbon dioxide guided in through the gas conveying pipe is diffused through the gas conveying spray head, gas-liquid two-phase full contact is achieved, calcium carbonate precipitates are generated, the precipitates are intercepted to the containing cabin through the filter screen, and redundant liquid is discharged through the discharging port; for side reaction, a temperature control medium is input through a liquid inlet of the temperature control mechanism, so that the liquid tank is kept in an environment of 35 + / -2 DEG C, and reverse dissolution of calcium carbonate is inhibited; and the CO2 concentration is adjusted to 8-12 vol%, so that the main and side reaction paths can be directionally regulated and controlled, the yield of nano calcium carbonate is ensured to be more than 95%, and the production of calcium bicarbonate can be switched.

Description

Technical Field

[0001] This utility model relates to the technical field of carbonation reaction equipment, specifically a continuous carbonation reaction equipment for nano-calcium carbonate. Background Technology

[0002] Calcium carbonate (CaCO3) is a widely distributed inorganic compound, naturally occurring in limestone, marble, calcite, etc. In industry, it is often referred to as limestone, stone powder, or heavy / light calcium carbonate. Chemically, it is weakly alkaline and sparingly soluble in water but soluble in hydrochloric acid (reacting with acid to produce carbon dioxide, water, and soluble calcium salts). To meet specific application requirements, surface modification of primary calcium carbonate is necessary. This involves coating or grafting heavy calcium carbonate (obtained by grinding natural ore) or light calcium carbonate (synthesized by chemical precipitation) onto the surface with activators, simultaneously achieving hydrophobic modification and enhanced reactivity of the particle surface. The modification process typically relies on carbonation reaction equipment, precisely controlling the carbon dioxide diffusion rate and calcium carbonate crystallization kinetics in a gas-liquid-solid multiphase system, ultimately yielding a high-value-added product with both functional surface properties and excellent dispersibility.

[0003] However, the existing technical solutions have the following shortcomings: the normal calcium carbonate production process involves side reactions, which leads to a decrease in calcium carbonate yield. Therefore, there is an urgent need for a continuous carbonation reaction device for nano-calcium carbonate. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a continuous carbonation reaction device for nano-calcium carbonate, so as to solve the problem mentioned in the background art that the normal calcium carbonate production process includes side reactions, which leads to a decrease in calcium carbonate yield.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a continuous carbonization reaction device for nano-calcium carbonate, including a reaction mechanism, wherein a temperature control mechanism is provided at the bottom of the reaction mechanism;

[0006] The reaction mechanism includes an outer shell, a gas supply pipe fixedly connected to the top of the outer shell, a gas supply nozzle fixedly connected to the top of the inner wall of the outer shell, a liquid supply pipe fixedly connected to the top of the outer shell, an atomizing nozzle fixedly connected to the top of the inner wall of the outer shell, a filter screen fixedly connected to the inner wall of the outer shell, an opening on the surface of the outer shell, a placement chamber slidably connected to the inner wall of the opening, a liquid outlet on the surface of the placement chamber, and a discharge port fixedly connected to the bottom of the outer shell.

[0007] The bottom end of the gas delivery pipe passes through the outer shell and is fixedly connected to the gas delivery nozzle, and the bottom end of the liquid delivery pipe passes through the outer shell and is fixedly connected to the atomizing nozzle.

[0008] The surface of the outer casing is designed to be wavy, which increases the contact area between the outer casing and the temperature control mechanism.

[0009] The temperature control mechanism is used to control the stability within the reaction mechanism, so that the reaction can proceed at a suitable temperature. The temperature control mechanism includes a second outer shell, a liquid chamber inside the second outer shell, a liquid inlet fixedly connected to the left side of the second outer shell, a liquid outlet fixedly connected to the end of the second outer shell away from the liquid inlet, a storage groove on the surface of the second outer shell, a support base fixedly connected to the bottom of the second outer shell, and a support leg fixedly connected to the bottom of the support base.

[0010] The inner wall of the second outer shell is slidably connected to the first outer shell, and the inner wall of the storage slot is slidably connected to the storage compartment.

[0011] The support legs are provided in two sets, and the two sets of support legs are respectively located at the left and right ends of the bottom surface of the support base.

[0012] A handle is fixedly connected to the front end of the placement compartment.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0014] First, in use, this utility model introduces a calcium hydroxide solution through an infusion pipe, which is then sprayed out through an atomizing nozzle. Carbon dioxide gas is introduced into a gas supply pipe and sprayed out through a gas supply nozzle. The calcium hydroxide water mist reacts chemically with the carbon dioxide gas to form calcium carbonate precipitate, which falls into the placement chamber. Excess liquid flows out through the outlet, enabling the device to produce calcium carbonate. Furthermore, the atomizing nozzle increases the contact area between calcium hydroxide and carbon dioxide, thereby improving the reaction rate of the device.

[0015] Secondly, the calcium carbonate precipitated in this invention will also undergo side reactions with liquid and carbon dioxide. To prevent side reactions, the temperature inside the outer shell can be controlled by introducing water at the appropriate temperature through the inlet, so that the device operates under normal pressure with the reverse reaction as the main reaction, thus preventing a decrease in calcium carbonate production. Alternatively, the temperature and carbon dioxide concentration can be controlled to make the reaction operate with the forward reaction as the main reaction, thereby producing Ca(HCO3)2. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a disassembled schematic diagram of the overall structure of this utility model;

[0018] Figure 3 This is a schematic diagram of part of the structure of this utility model;

[0019] Figure 4 This is a partial structural disassembly diagram of the present invention.

[0020] The components are as follows: 1. Reaction mechanism; 10. Outer shell one; 1001. Gas supply pipe; 1002. Gas supply nozzle; 1003. Liquid supply pipe; 1004. Atomizing nozzle; 1005. Filter screen; 1006. Placement chamber; 1007. Liquid outlet; 1008. Handle; 1009. Discharge port; 2. Temperature control mechanism; 20. Outer shell two; 2001. Liquid tank; 2002. Liquid inlet; 2003. Liquid outlet; 2004. Storage trough; 2005. Support base; 2006. Support leg. Detailed Implementation

[0021] The specific embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0022] Please see Figure 1-4 A continuous carbonization reaction device for nano-calcium carbonate includes a reaction mechanism 1, and a temperature control mechanism 2 is provided at the bottom of the reaction mechanism 1.

[0023] The reaction mechanism 1 includes an outer shell 10. A gas supply pipe 1001 is fixedly connected to the top of the outer shell 10. A gas supply nozzle 1002 is fixedly connected to the top of the inner wall of the outer shell 10. A liquid supply pipe 1003 is fixedly connected to the top of the outer shell 10. An atomizing nozzle 1004 is also fixedly connected to the top of the inner wall of the outer shell 10. A filter screen 1005 is fixedly connected to the inner wall of the outer shell 10. An opening is provided on the surface of the outer shell 10. A placement chamber 1006 is slidably connected to the inner wall of the opening. A liquid outlet 1007 is provided on the surface of the placement chamber 1006. A discharge port 1009 is fixedly connected to the bottom of the outer shell 10.

[0024] The reaction mechanism 1 (outer shell 10) injects carbon dioxide gas through the top gas supply pipe 1001 and gas supply nozzle 1002, while simultaneously atomizing calcium hydroxide solution is sprayed through the liquid supply pipe 1003 connected to the atomizing nozzle 1004, forming a gas-liquid two-phase mixed reaction. The filter screen 1005 separates unreacted gas from the products. The precipitated nano-calcium carbonate falls into the sliding placement chamber 1006 for temporary storage, while the unreacted liquid and by-products are discharged through the liquid outlet 1007 and the bottom discharge port 1009. The whole process realizes enhanced gas-liquid mass transfer, graded collection of products, and control of side reactions.

[0025] The bottom end of the gas delivery pipe 1001 passes through the outer casing 10 and is fixedly connected to the gas delivery nozzle 1002. The bottom end of the liquid delivery pipe 1003 passes through the outer casing 10 and is fixedly connected to the atomizing nozzle 1004.

[0026] The gas delivery pipe 1001 passes through the bottom end of the outer shell 10 and is fixedly connected to the gas delivery nozzle 1002 to realize the directional delivery and diffusion of carbon dioxide gas; the liquid delivery pipe 1003 passes through the bottom end of the outer shell 10 and is connected to the atomizing nozzle 1004 to complete the atomization spraying of calcium hydroxide solution. The two work together to construct a gas-liquid two-phase micro-interface reaction system.

[0027] The surface of the outer casing 10 is designed to be wavy, which can increase the contact area between the outer casing 10 and the temperature control mechanism 2.

[0028] The wave-shaped surface design of the outer shell 10 increases the contact area with the temperature control mechanism 2 by about 40-60%, thereby enhancing the heat transfer efficiency. At the same time, the wave structure induces fluid turbulence, optimizes the uniformity of the temperature field (temperature difference fluctuation ≤ ±1.5℃), and effectively prevents local overheating or crystal deposition.

[0029] Temperature control mechanism 2 is used to control the stability within reaction mechanism 1, so that the reaction can proceed at a suitable temperature. Temperature control mechanism 2 includes outer shell 20, inside which a liquid chamber 2001 is provided, a liquid inlet 2002 is fixedly connected to the left side of outer shell 20, a liquid outlet 2003 is fixedly connected to the end of outer shell 20 away from the liquid inlet 2002, a storage groove 2004 is provided on the surface of outer shell 20, a support base 2005 is fixedly connected to the bottom of outer shell 20, and a support leg 2006 is fixedly connected to the bottom of support base 2005.

[0030] The temperature control mechanism 2 circulates the temperature control medium through the liquid tank 2001 inside the outer shell 20, which is input through the liquid inlet 2002 and output through the liquid outlet 2003 to achieve temperature control of the reaction mechanism 1; the storage tank 2004 matches the corrugated surface of the outer shell 10 to enhance heat exchange, and the support base 2005 and support leg 2006 provide structural stability.

[0031] The inner wall of outer shell 20 is slidably connected to outer shell 10, and the inner wall of storage slot 2004 is slidably connected to storage compartment 1006.

[0032] It can accommodate the placement compartment 1006.

[0033] The support legs 2006 are provided in two sets, which are respectively located at the left and right ends of the bottom surface of the support base 2005.

[0034] The two sets of support legs 2006 provide stable support for the entire device.

[0035] The front end of the placement compartment 1006 is fixedly connected with a handle 1008.

[0036] The placement compartment 1006 can be pulled out using handle 1008.

[0037] In operation, calcium hydroxide solution is introduced through infusion pipe 1003 and sprayed out through atomizing nozzle 1004. Carbon dioxide gas is introduced into gas infusion pipe 1001 and sprayed out through gas infusion nozzle 1002. The calcium hydroxide water mist reacts chemically with the carbon dioxide gas to form calcium carbonate precipitate, which falls into the placement chamber 1006. Excess liquid flows out through discharge port 1009, enabling the device to produce calcium carbonate. The atomizing nozzle 1004 increases the contact area between calcium hydroxide and carbon dioxide, improving the reaction rate. Furthermore, the precipitated calcium carbonate undergoes side reactions with the liquid and carbon dioxide. To prevent side reactions, the temperature inside the outer shell 20 can be controlled by introducing water of the appropriate temperature through the liquid inlet 2002, so that the device operates under normal pressure with the reverse reaction as the main reaction, thus preventing a decrease in calcium carbonate production. Alternatively, the reaction can be controlled by adjusting the temperature and carbon dioxide concentration to produce Ca(HCO3)2, which is then produced with the forward reaction as the main reaction.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A continuous carbonization reaction device for nano-calcium carbonate, comprising a reaction mechanism (1), characterized in that: A temperature control mechanism (2) is provided at the bottom of the reaction mechanism (1); The reaction mechanism (1) includes a first outer shell (10), a gas supply pipe (1001) is fixedly connected to the top of the first outer shell (10), a gas supply nozzle (1002) is fixedly connected to the top of the inner wall of the first outer shell (10), a liquid supply pipe (1003) is fixedly connected to the top of the first outer shell (10), an atomizing nozzle (1004) is also fixedly connected to the top of the inner wall of the first outer shell (10), a filter screen (1005) is fixedly connected to the inner wall of the first outer shell (10), an opening is provided on the surface of the first outer shell (10), a placement chamber (1006) is slidably connected to the inner wall of the opening, a liquid outlet (1007) is provided on the surface of the placement chamber (1006), and a discharge port (1009) is fixedly connected to the bottom of the first outer shell (10).

2. The nano-calcium carbonate continuous carbonation reaction equipment according to claim 1, characterized in that: The bottom end of the gas delivery pipe (1001) passes through the outer shell (10) and is fixedly connected to the gas delivery nozzle (1002), and the bottom end of the liquid delivery pipe (1003) passes through the outer shell (10) and is fixedly connected to the atomizing nozzle (1004).

3. The nano-calcium carbonate continuous carbonation reaction equipment according to claim 1, characterized in that: The surface of the outer shell (10) is set to a wave shape, which can increase the contact area between the outer shell (10) and the temperature control mechanism (2).

4. The nano-calcium carbonate continuous carbonation reaction equipment according to claim 1, characterized in that: The temperature control mechanism (2) is used to control the stability inside the reaction mechanism (1) so that the reaction can be carried out at a suitable temperature. The temperature control mechanism (2) includes a second outer shell (20), a liquid chamber (2001) is opened inside the second outer shell (20), an inlet (2002) is fixedly connected to the left side of the second outer shell (20), an outlet (2003) is fixedly connected to the end of the second outer shell (20) away from the inlet (2002), a storage groove (2004) is opened on the surface of the second outer shell (20), a support base (2005) is fixedly connected to the bottom end of the second outer shell (20), and a support leg (2006) is fixedly connected to the bottom end of the support base (2005).

5. The nano-calcium carbonate continuous carbonation reaction equipment according to claim 4, characterized in that: The inner wall of the second outer shell (20) is slidably connected to the first outer shell (10), and the inner wall of the storage slot (2004) is slidably connected to the storage compartment (1006).

6. The nano-calcium carbonate continuous carbonation reaction equipment according to claim 4, characterized in that: The support leg (2006) is provided in two sets, and the two sets of support legs (2006) are respectively located at the left and right ends of the bottom surface of the support base (2005).

7. The nano-calcium carbonate continuous carbonation reaction equipment according to claim 1, characterized in that: A handle (1008) is fixedly connected to the front end of the placement compartment (1006).

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