Carbon dioxide collection device in the production of active magnesium oxide

Abstract

The utility model relates to the field of chemical equipment especially is concerned with a carbon dioxide collection device when making active magnesium oxide, including the reation kettle, the reation kettle is connected with liquefaction unit through first connecting pipe, the liquefaction unit is connected with buffer storage tank through second connecting pipe, the reation kettle contains reation kettle main part, the outlet of reation kettle main part is provided with filter assembly, filter assembly includes primary efficiency physical barrier layer, deep layer ceramic filter core and end precision filter screen, and the device adopts scientific three -stage filtration (initial resistance, deep filtration, precision filtration) structure design, can efficiently remove the magnesium oxide dust of different particle sizes in high -temperature airflow (> 99%), fundamentally solves the problem such as dust jam, downstream equipment corrosion and low gas purity.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment, and in particular to a carbon dioxide collection device for the production of active magnesium oxide. Background Technology

[0002] Magnesium oxide (MgO) is an important inorganic material widely used in refractory materials, building materials, pharmaceuticals, food additives, and many other fields. One of its main production methods is through the calcination of magnesium carbonate (MgCO3), a reaction that produces a large amount of carbon dioxide gas. However, in traditional production processes, this carbon dioxide is often directly emitted into the atmosphere, not only wasting resources but also exacerbating the greenhouse effect, which is inconsistent with the current requirements for green and low-carbon development.

[0003] Existing technologies for collecting this carbon dioxide mainly employ simple methods such as connecting a gas collection bag to the reactor outlet or directly introducing the absorbent liquid. These methods have significant drawbacks: Dust pollution: The airflow generated by high-temperature decomposition carries a large amount of fine magnesium oxide dust, which can easily clog pipelines, valves and downstream equipment, and even contaminate the collected carbon dioxide products.

[0004] Low collection efficiency and poor purity: Dust can enter the collection system, resulting in low purity of the collected carbon dioxide and increasing subsequent purification costs. Simple absorption methods may also become ineffective or contaminated due to dust.

[0005] Equipment corrosion and blockage: The combination of high-temperature gas and dust will accelerate equipment corrosion, and dust agglomeration in cooling parts will cause serious blockage.

[0006] Energy loss and safety risks: Direct emission or treatment of warm gas leads to heat loss, and there are safety risks if the high temperature and high pressure conditions are not properly controlled.

[0007] Therefore, developing a specialized device that can efficiently, continuously, and safely collect high-purity carbon dioxide in high-temperature, dusty environments and effectively convert it into liquid for storage is of significant practical importance and application value. Utility Model Content

[0008] To overcome the shortcomings of existing technologies, this utility model provides a carbon dioxide collection device for the production of active magnesium oxide, which can efficiently remove magnesium oxide dust of different particle sizes (>99%) from high-temperature gas flow, fundamentally solving the problems of dust blockage, downstream equipment corrosion and low gas purity.

[0009] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a carbon dioxide collection device for producing active magnesium oxide, comprising a reaction vessel, wherein the reaction vessel is connected to a liquefaction unit via a first connecting pipe, the liquefaction unit is connected to a buffer storage tank via a second connecting pipe, the reaction vessel comprises a reaction vessel body, and a filter assembly is provided at the outlet of the reaction vessel body, the filter assembly comprising a primary physical barrier layer, a deep ceramic filter element, and a final precision filter screen.

[0010] Furthermore, a one-way air inlet valve is provided at the air inlet of the main body of the reactor.

[0011] Furthermore, the filter assembly also includes an outer jacket, the inner wall of which is provided with a groove, and a locking block is disposed in the groove, the locking block being installed in the groove by a spring.

[0012] Furthermore, a cooler is mounted via a flange at the end of the filter assembly furthest from the reactor body.

[0013] Furthermore, the cooler includes a cooling jacket, and a cooling pipe is disposed inside the cooling jacket.

[0014] Furthermore, the liquefaction unit is a compression refrigeration unit.

[0015] Furthermore, the buffer tank is installed on the second connecting pipe via a valve.

[0016] Compared with the prior art, the beneficial effects that this utility model can achieve are: This application adopts a scientifically designed three-stage filtration structure (primary filter, deep filter, and fine filter), which can efficiently remove magnesium oxide dust of different particle sizes (>99%) from high-temperature airflow, fundamentally solving the problems of dust blockage, downstream equipment corrosion, and low gas purity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the carbon dioxide collection device for producing active magnesium oxide according to this utility model. Figure 2 This is a schematic diagram of the reaction vessel of the carbon dioxide collection device for producing active magnesium oxide according to this utility model. Figure 3 This is a schematic diagram of the filter assembly of the carbon dioxide collection device for producing active magnesium oxide according to this utility model. Figure 4 This is a schematic diagram of the cooler in the carbon dioxide collection device for producing active magnesium oxide according to this invention.

[0018] The components include: a reaction vessel 1; a reaction vessel body 11; a one-way air inlet valve 12; a filter assembly 13; an outer jacket 131; a spring 132; a retaining block 133; a primary physical barrier layer 134; a deep ceramic filter element 135; a terminal precision filter screen 136; a cooler 14; a cooling jacket 141; a cooling pipe 142; a first connecting pipe 2; a liquefaction unit 3; a second connecting pipe 4; and a buffer storage tank 5. Detailed Implementation

[0019] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this utility model. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0020] Example: Combination Figures 1-4As shown, this utility model provides a carbon dioxide collection device for producing active magnesium oxide, including a reaction vessel 1. The reaction vessel 1 is connected to a liquefaction unit 3 via a first connecting pipe 2. The liquefaction unit 3 is preferably a compression refrigeration unit. The liquefaction unit 3 is connected to a buffer storage tank 5 via a second connecting pipe 4. The reaction vessel 1 includes a reaction vessel body 11, which carries magnesium carbonate raw material and is equipped with a heating device (such as an electric heating wire, a gas heater, a jacketed heater, etc.). The upper part of the vessel body is provided with a gas outlet for discharging high-temperature (usually above 600℃) carbon dioxide gas (which inevitably carries MgO dust). A filter assembly 13 is installed at the outlet of the reactor body 11. The filter assembly 13 is installed on the reactor body 11 through a flange and a high-temperature resistant sealing gasket. The filter assembly 13 includes a primary physical barrier layer 134, a deep ceramic filter element 135, and a final precision filter screen 136. The primary physical barrier layer 134 is located at the upstream end (close to the reactor) and uses a high-temperature resistant (up to 800℃ or above) metal wire mesh (such as 304 or 316L stainless steel wire mesh) or stainless steel sintered felt to intercept larger magnesium oxide particles and gas-solid agglomerates in the gas flow, so as to avoid clogging the subsequent fine filter element. The deep ceramic filter element 135 is located in the middle layer and uses a high porosity, high-temperature resistant (up to 800℃ or above), and alkali corrosion resistant ceramic fiber filter element or porous ceramic (such as corundum or cordierite) filter element. Its main function is deep filtration, capturing most of the fine magnesium oxide dust (reaching the micron or submicron level); the final precision filter 136 is located at the downstream end (close to the cooling unit), using a finer stainless steel wire mesh (such as 400 mesh or above), as the last line of defense, capturing extremely fine particles or detached ceramic fragments that may penetrate the ceramic filter element, ensuring the purity of carbon dioxide entering the cooling section.

[0021] The reactor body 11 is equipped with a one-way air inlet valve 12 at the air inlet, which is used to control the air intake when necessary (such as initial filling with inert gas for protection, or supplementation with specific reaction gas).

[0022] The filter assembly 13 also includes an outer casing 131. A groove is provided on the inner wall of the outer casing 131, and a locking block 133 is provided in the groove. The locking block 133 is spherical and is installed in the groove by a spring 132. The locking block 133 facilitates the installation and removal of the primary physical barrier layer 134, the deep ceramic filter element 135, and the final precision filter screen 136, making it convenient for regular inspection, cleaning, or replacement of the filter media.

[0023] A cooler 14 is installed at the end of the filter assembly 13 away from the main body 11 of the reactor via a flange. The cooler 14 first cools the pure carbon dioxide gas at about 200°C (after natural cooling through a section of pipeline). Usually, circulating water is used for cooling to reduce the gas temperature to about room temperature (20-40°C).

[0024] The cooler 14 includes a cooling jacket 141, and a cooling pipe 142 is provided inside the cooling jacket 141. The cooling pipe 142 is spiral-shaped. The spiral shape can increase the contact area and the flow time of the coolant in the cooling jacket 141, so as to achieve a better cooling effect.

[0025] The liquefaction unit 3 uses a compression refrigeration unit. The liquefaction unit 3 further cools the pure high-pressure carbon dioxide gas, which is close to room temperature, to about -78.5°C at normal pressure, and even higher at increased pressure, so as to liquefy it. The exterior of the liquefaction unit 3 is covered with a heat insulation layer such as heat insulation cotton or foam glass to reduce the loss of cold energy.

[0026] The buffer tank 5 is installed on the second connecting pipe 4 via a valve. The buffer tank 5 is used to receive and store liquid carbon dioxide. The buffer tank 5 is equipped with necessary accessories such as a level gauge, a safety valve (such as a spring safety valve), and a vent valve.

[0027] Working principle: The heating device of reactor 1 is activated to decompose magnesium carbonate (usually at 600-900℃). The reaction begins, producing high-temperature (approximately 600-800℃) carbon dioxide gas (containing MgO dust). The high-temperature mixed gas generated by the reaction enters the multi-layer filter assembly (13) from the outlet at the top of the reactor. The mixed gas sequentially passes through the primary physical barrier layer (134) (intercepting large particles / clumps), the deep ceramic filter element (135) (deep filtration to capture fine dust), and the final precision filter (136) (fine filtration), resulting in pure high-temperature carbon dioxide gas (temperature reduced to approximately 200-400℃). The pure carbon dioxide gas first passes through cooler 14, where it is cooled to near room temperature (e.g., below 40℃) by circulating cooling water. Then it enters liquefaction unit 3, where it is further cooled by the refrigeration system to liquid carbon dioxide (e.g., liquefaction occurs when cooled to -20 to -30℃ under approximately 2-3 MPa pressure). The liquefied carbon dioxide flows into buffer storage tank 5 for storage.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A carbon dioxide collecting device in the preparation of active magnesium oxide, comprising a reaction kettle (1), the reaction kettle (1) is connected with a liquefaction unit (3) through a first connecting pipe (2), the liquefaction unit (3) is connected with a buffer storage tank (5) through a second connecting pipe (4), characterized in that: The reactor (1) includes a reactor body (11), and a filter assembly (13) is provided at the outlet of the reactor body (11). The filter assembly (13) includes a primary physical barrier layer (134), a deep ceramic filter element (135), and a final precision filter screen (136).

2. The carbon dioxide collecting device at the time of production of active magnesium oxide according to claim 1, characterized by: The main body of the reactor (11) is equipped with a one-way air inlet valve (12).

3. The carbon dioxide collecting device at the time of production of active magnesium oxide according to claim 1, characterized by: The filter assembly (13) also includes an outer jacket (131), the inner wall of which is provided with a groove, and a locking block (133) is provided in the groove. The locking block (133) is installed in the groove by a spring (132).

4. The carbon dioxide collecting device at the time of production of active magnesium oxide according to claim 1, characterized by: A cooler (14) is installed at the end of the filter assembly (13) away from the reactor body (11) via a flange.

5. The carbon dioxide collecting device at the time of production of active magnesium oxide according to claim 4, characterized by: The cooler (14) includes a cooling jacket (141) and a cooling pipe (142) is provided inside the cooling jacket (141).

6. The carbon dioxide collection device for producing active magnesium oxide according to claim 1, characterized in that: The liquefaction unit (3) is a compression refrigeration unit.

7. The carbon dioxide collecting device at the time of production of active magnesium oxide according to claim 1, characterized by: The buffer tank (5) is installed on the second connecting pipe (4) via a valve.

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