Carbonization reaction tower for preparing light calcium carbonate
By introducing the high-temperature carbon dioxide flue gas discharged from the calcining kiln into the carbonization reaction tower and reacting with the calcium hydroxide solution, ultrafine and light calcium carbonate is generated, and the flue gas heat is used to dry it, solving the problems of cumbersome traditional processes and energy waste, achieving efficient production and energy conservation and emission reduction.
Patent Information
- Application Number
- CN202421503090.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The carbonization reaction tower of traditional calcium carbonate is complicated, the generation efficiency is low, and it cannot be used to react with the carbon dioxide emitted by combustion equipment, resulting in energy waste and increased carbon emissions.
A carbonization reaction tower including a reaction tower and a calcining kiln was designed. By introducing the high-temperature carbon dioxide flue gas discharged from the calcining kiln and reacting it with the calcium hydroxide solution in the reaction tower to generate ultrafine light calcium carbonate and dry it with the heat in the flue gas.
The calcium carbonate preparation process is simplified, production efficiency is improved, the effective utilization of carbon dioxide is achieved, and energy consumption and carbon emissions are reduced.
Smart Images
Figure CN222805190U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of carbonization reaction towers, in particular to a carbonization reaction tower for preparing light calcium carbonate. Background Art
[0002] The carbonization reaction tower of calcium carbonate is a device used to synthesize calcium carbonate in industrial production. Calcium carbonate is an important chemical raw material, widely used in building materials, chemicals, medicine, food and environmental protection. The reaction tower is the core component of the carbonization reaction, usually using a vertical cylindrical structure. In the reaction tower, calcium hydroxide solution (calcium slurry in water) reacts with carbon dioxide in the air to generate solid calcium carbonate precipitation and water. This reaction is one of the important methods for preparing calcium carbonate in industry, and is often used in water treatment, environmental protection, building materials preparation and other fields.
[0003] The prior art has the following deficiencies: conventional calcium carbonate carbonization reaction towers usually adopt a wet preparation method. After the reaction is completed, the calcium carbonate solid needs to be separated from the reaction mixture by separation techniques such as filtration and centrifugation. Then, the separated contact calcium carbonate solid needs to be dried to obtain the calcium carbonate product. Therefore, the conventional wet preparation method has the problem of cumbersome and complicated process steps, and the reaction efficiency of calcium carbonate is not high; and in large industrial production enterprises, usually not only a single calcium carbonate product is produced and prepared, but there may also be some equipment that utilizes combustion reactions to generate substances (such as calcining kilns, etc.). These combustion equipment usually emits a large amount of kiln tail gas containing carbon dioxide components, and the conventional calcium carbonate carbonization reaction tower cannot absorb and utilize the carbon dioxide components emitted by the combustion equipment for reaction, which is not conducive to achieving energy conservation and emission reduction and reducing the carbon emissions of the enterprise.
[0004] Therefore, it is necessary to invent a carbonization reaction tower for preparing light calcium carbonate. Utility Model Content
[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a carbonization reaction tower for preparing light calcium carbonate, comprising a reaction tower and a calcining kiln, a product box is arranged below the reaction tower, a smoke exhaust port is arranged at the center of the top of the reaction tower, an air inlet is arranged at the lower part of the outer wall of the reaction tower, the smoke exhaust port at the top of the reaction tower is fixedly connected to an air pipe, one end of the air pipe away from the reaction tower is fixedly connected to a metal filter dust collector, the air inlet is connected to the exhaust port of the calcining kiln through a conduit, the air inlet can introduce the high-temperature carbon dioxide gas discharged from the calcining kiln into the reaction tower, a shearing atomizer is arranged around the inner wall of the smoke exhaust port at the top of the reaction tower, the shearing atomizer can spray out a calcium hydroxide solution, a fine product self-locking receiver is installed at the bottom of the reaction tower, when a sufficient amount of calcium carbonate is accumulated in the fine product self-locking receiver, the fine product self-locking receiver can automatically open to allow the calcium carbonate to fall into the product box.
[0006] Preferably, the shearing atomizer is connected to a water tank filled with calcium hydroxide solution through a conduit, and the shearing atomizer can spray saturated calcium hydroxide solution from a nozzle at high speed by shearing and rotating.
[0007] Preferably, different numbers of nozzles are installed at different heights around the upper inner wall of the reaction tower, and the nozzles are also connected to a water tank filled with calcium hydroxide solution through a conduit.
[0008] Preferably, the self-locking receiver for fine products comprises a collecting funnel, the collecting funnel is fixedly mounted on the bottom surface of the reaction tower, and the lower end of the collecting funnel is fixedly connected to a receiver conduit.
[0009] Preferably, the self-locking receiver for fine products includes a receiver baffle, the lower end of the receiver conduit is an oblique structure, the receiver baffle is rotatably mounted on the lower end of the receiver conduit, and the lower end of the receiver conduit is rotatably connected to the receiver baffle on one side close to the collecting funnel.
[0010] Preferably, the self-locking receiver for micro-products includes a connecting plate, which is fixedly mounted on one end of the receiver baffle and the receiver tube for rotation connection, and a balancing hammer is fixedly mounted on the end of the connecting plate away from the receiver baffle, and the sinking of the balancing hammer can drive the receiver baffle to tilt up and close the receiver tube.
[0011] Preferably, a filter screen is fixedly installed on the end face of a smoke outlet disposed at the center of the top of the reaction tower, and the filter screen adopts a multi-layer filter screen structure with different apertures.
[0012] The beneficial effects of the utility model are as follows: 1. The reaction tower introduces flue gas containing carbon dioxide discharged from the calcining kiln, and cooperates with the shear-type atomizer to spray calcium hydroxide solution, and the ultra-fine light calcium carbonate particles generated are directly dried and heated by the heat in the flue gas through chemical reaction with the high-temperature flue gas. This changes the conventional technical route of preparing light calcium carbonate by wet method in the past, and integrates the carbonization reaction process of generating light calcium carbonate and the drying process of the product into one reaction tower, so as to simplify the calcium carbonate preparation process and improve the production efficiency of calcium carbonate.
[0013] 2. The utility model can directly utilize the flue gas purified at the kiln tail to realize the preparation of products, and at the same time of obtaining light calcium carbonate products, it can achieve multiple purposes of energy conservation and emission reduction and reduce the carbon emissions of enterprises.
[0014] 3. Use metal filter materials to achieve effective recovery of products in the reaction tower and purification of flue gas and exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1A structural schematic diagram of a carbonization reaction tower for preparing light calcium carbonate provided by the utility model;
[0016] Figure 2 A schematic diagram of the internal structure of a reaction tower for preparing light calcium carbonate provided by the utility model;
[0017] Figure 3 A detailed view of a flue gas outlet at the top of a reaction tower for preparing light calcium carbonate provided by the utility model;
[0018] Figure 4 The utility model provides a schematic diagram of a self-locking receiver structure for fine products of a carbonization reaction tower for preparing light calcium carbonate.
[0019] In the figure: reaction tower 11, bracket 12, air pipe 13, metal filter dust collector 14, air inlet 15, nozzle 16, shear atomizer 17, filter screen 18, product box 19, collecting funnel 21, receiver duct 22, receiver baffle 23, connecting plate 24, counterweight 25. DETAILED DESCRIPTION
[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.
[0021] Example 1
[0022] like Figure 1 and Figure 2 As shown, a carbonization reaction tower for preparing light calcium carbonate in an embodiment of the first aspect of the utility model comprises a reaction tower 11 and a calcining kiln, a product box 19 is arranged below the reaction tower 11, a smoke exhaust outlet is arranged at the center of the top of the reaction tower 11, an air inlet 15 is arranged at the lower part of the outer wall of the reaction tower 11, the smoke exhaust outlet at the top of the reaction tower 11 is fixedly connected to an air pipe 13, and the end of the air pipe 13 away from the reaction tower 11 is fixedly connected to a metal filter dust collector 14, the air inlet 15 is connected to the exhaust port of the calcining kiln through a conduit, and the air inlet 15 can introduce the high-temperature carbon dioxide gas discharged from the calcining kiln into the reaction tower 11, and a shearing atomizer 17 is arranged around the inner wall of the smoke exhaust outlet at the top of the reaction tower 11, and the shearing atomizer 17 can spray out a calcium hydroxide solution, and a fine product self-locking receiver is installed at the bottom of the reaction tower 11. When a sufficient amount of calcium carbonate accumulates in the fine product self-locking receiver, the fine product self-locking receiver can automatically open to allow the calcium carbonate to fall into the product box 19.
[0023] In the above embodiment, it should be noted that the metal filter dust collector 14 is mainly composed of a bag dust collector containing metal filter material, which can achieve effective dust removal of high-temperature flue gas, and the recovered product is also a light calcium carbonate product. The metal filter dust collector 14 can withstand a flue gas temperature exceeding 800°C, unlike ordinary filter materials that can only withstand flue gas below 300°C, thereby ensuring that the equipment can operate stably for a long time; the flue gas discharged from the calcining kiln needs to be desulfurized and dusted in advance before it can be introduced into the reaction tower 11 through the air inlet 15; multiple layers are arranged around the lower part of the reaction tower 11 at a certain height. The air inlet 15 is connected to a distributed ultra-fine multi-head air inlet pipe to achieve uniform radial distribution of external gas in the tower. At the same time, by adjusting the flow rate and flow rate of the gas ejected from the ultra-fine multi-head air inlet pipe at different positions, the particle size of the light calcium carbonate product prepared and dried can be adjusted; the calcium hydroxide solution is atomized into fine slurry droplets by starting the shearing atomizer 17 and sprayed from the upper part of the reaction tower, and then the high-temperature flue gas containing carbon dioxide discharged from the calcining kiln is introduced from the bottom of the reaction tower 11 through the air inlet 15. The high-temperature carbon dioxide flue gas is mixed with the fine calcium hydroxide in the middle of the reaction tower 11. The saturated slurry reacts to generate ultrafine calcium carbonate, and then the gas is discharged from the flue gas outlet at the top of the reaction tower 11. The generated ultrafine light calcium carbonate particles fall directly from the middle of the reaction tower 11 and are directly dried and heated by the heat in the flue gas, so as to achieve the effect of simultaneously carrying out the reaction generation and dehydration and drying in the reaction tower, changing the process route of the usual production of ultrafine calcium carbonate, which requires carbonization and dehydration and drying to be carried out in different process steps, simplifying the calcium carbonate preparation process and improving the calcium carbonate production efficiency; the gas discharged from the flue gas outlet at the top of the reaction tower 11 enters the metal filter material along the air pipe 13 to remove The metal filter dust collector 14 can effectively remove dust from the high-temperature flue gas, and the recovered product is also a light calcium carbonate product; the generated fine particles of light calcium carbonate will fall into the self-locking receiver of the fine product at the bottom of the reaction tower 11 after drying, and as its mass increases, the self-locking receiver of the fine product will automatically open and allow the fine particles of light calcium carbonate to fall into the bottom product box 19, and then the self-locking receiver of the fine product will resume closing to prevent the product in the product box 19 from returning to the tower, and the product in the product box 19 and the dust ash recovered by the metal filter dust collector 14 can be directly packaged into finished products.
[0024] Example 2
[0025] like Figure 1-Figure 3 As shown, a carbonization reaction tower for preparing light calcium carbonate includes all the contents of Example 1. In addition, the shearing atomizer 17 is connected to a water tank filled with calcium hydroxide solution through a conduit, and the shearing atomizer 17 can spray saturated calcium hydroxide solution from a nozzle at high speed by shearing rotation. Different numbers of nozzles 16 are also installed at different heights around the upper part of the inner wall of the reaction tower 11, and the nozzles 16 are also connected to the water tank filled with calcium hydroxide solution through a conduit.
[0026] In the above embodiment, it should be noted that the shearing atomizer 17 sprays the saturated calcium hydroxide solution from the nozzle at a high speed by shearing and rotating, and the nozzle 16 on the inner wall of the reaction tower 11 can also spray the saturated calcium hydroxide solution from the nozzle at a high speed, so as to achieve the effect of spraying saturated calcium bicarbonate mist solution from the upper part of the reaction tower 1.
[0027] Example 3
[0028] like Figure 1 , Figure 2 and Figure 4 As shown, a carbonization reaction tower for preparing light calcium carbonate includes all the contents of Example 1. In addition, the self-locking receiver for fine products includes a collecting funnel 21, which is fixedly installed on the bottom surface of the reaction tower 11. The lower end of the collecting funnel 21 is fixedly connected to a receiver conduit 22. The self-locking receiver for fine products includes a receiver baffle 23. The lower end of the receiver conduit 22 is an oblique structure. The receiver baffle 23 is rotatably installed on the lower end of the receiver conduit 22. The side of the lower end of the receiver conduit 22 close to the collecting funnel 21 is rotatably connected to the receiver baffle 23. The self-locking receiver for fine products includes a connecting plate 24, which is fixedly installed on one end of the receiver baffle 23 that is rotatably connected to the receiver conduit 22. A counterweight 25 is fixedly installed on one end of the connecting plate 24 away from the receiver baffle 23. The sinking of the counterweight 25 can drive the receiver baffle 23 to tilt up and close the receiver conduit 22.
[0029] In the above embodiment, it should be noted that the weight of the balance hammer 25 is greater than the weight of the receiver baffle 23. In the initial state, the balance hammer 25 sinks, driving one end of the connecting plate 24 to sink, causing the receiver baffle 23 to tilt upward to close the receiver conduit 22. The generated fine-grained light calcium carbonate falls into the collecting funnel 21 after drying, and is gathered into the receiver conduit 22 through the collecting funnel 21 and accumulated on the top of the receiver baffle 23. As the mass of the accumulated fine-grained light calcium carbonate increases, the receiver baffle 23 is pressed down to open, the balance hammer 25 tilts downward, and the accumulated fine-grained light calcium carbonate falls into the product box 19.
[0030] Example 4
[0031] like Figure 1 and Figure 3 As shown, a carbonization reaction tower for preparing light calcium carbonate includes all the contents of Example 1. In addition, a smoke outlet is arranged at the center of the top of the reaction tower 11, and a filter 18 is fixedly installed on the end face. The filter 18 adopts a multi-layer filter structure with different pore sizes.
[0032] In the above embodiment, it should be noted that the filter 18 can filter foreign particles in the smoke.
[0033] The use process of the utility model is as follows: a person skilled in the art will start the shearing atomizer 17 to atomize the calcium hydroxide solution into fine slurry droplets and spray them from the upper part of the reaction tower, and then introduce the high-temperature flue gas containing carbon dioxide discharged from the calcining kiln from the bottom of the reaction tower 11 through the air inlet 15. The high-temperature carbon dioxide flue gas reacts with the fine calcium hydroxide saturated slurry in the middle of the reaction tower 11 to generate ultrafine calcium carbonate. After that, the gas is discharged from the flue gas outlet at the top of the reaction tower 11. The generated ultrafine light calcium carbonate particles fall directly from the middle of the reaction tower 11 and are directly dried and heated by the heat in the flue gas. The generated fine light calcium carbonate particles fall into the collecting funnel 21 after drying, and are gathered into the receiver duct 22 through the collecting funnel 21 and accumulated on the top of the receiver baffle 23. As the mass of the accumulated fine light calcium carbonate particles increases, the receiver baffle 23 will be pressed down to open, the counterweight 25 will tilt upward, and the accumulated fine light calcium carbonate particles will fall into the product box 19.
[0034] The above is only a preferred embodiment of the utility model. Any person skilled in the art may modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement made according to the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.
Claims
1. A carbonization reaction tower for preparing light calcium carbonate, comprising a reaction tower (11) and a calcining kiln, wherein a product box (19) is arranged below the reaction tower (11), a smoke exhaust port is arranged at the center of the top of the reaction tower (11), and an air inlet (15) is arranged at the lower part of the outer wall of the reaction tower (11), characterized in that: The smoke outlet at the top of the reaction tower (11) is fixedly connected to an air pipe (13), and one end of the air pipe (13) away from the reaction tower (11) is fixedly connected to a metal filter dust collector (14). The air inlet (15) is connected to the exhaust port of the calcining kiln through a conduit, and the air inlet (15) can introduce the high-temperature carbon dioxide gas discharged from the calcining kiln into the reaction tower (11). A shearing atomizer (17) is arranged around the inner wall of the smoke outlet at the top of the reaction tower (11), and the shearing atomizer (17) can spray out a calcium hydroxide solution. A fine product self-locking receiver is installed at the bottom of the reaction tower (11). When a sufficient amount of calcium carbonate is accumulated in the fine product self-locking receiver, the fine product self-locking receiver can automatically open to allow the calcium carbonate to fall into a product box (19).
2. A carbonization reaction tower for preparing light calcium carbonate according to claim 1, characterized in that: The shearing atomizer (17) is connected to a water tank filled with calcium hydroxide solution through a conduit, and the shearing atomizer (17) can spray saturated calcium hydroxide solution from a nozzle at high speed by shearing and rotating.
3. A carbonization reaction tower for preparing light calcium carbonate according to claim 2, characterized in that: Different numbers of nozzles (16) are installed at different heights around the upper inner wall of the reaction tower (11), and the nozzles (16) are also connected to a water tank filled with calcium hydroxide solution through a conduit.
4. A carbonization reaction tower for preparing light calcium carbonate according to claim 1, characterized in that: The self-locking receiver for fine products comprises a collecting funnel (21), which is fixedly mounted on the bottom surface of the reaction tower (11), and the lower end of the collecting funnel (21) is fixedly connected to a receiver conduit (22).
5. A carbonization reaction tower for preparing light calcium carbonate according to claim 4, characterized in that: The self-locking receiver for fine products comprises a receiver baffle (23), the lower end of the receiver conduit (22) is an oblique structure, the receiver baffle (23) is rotatably mounted on the lower end of the receiver conduit (22), and the lower end of the receiver conduit (22) is rotatably connected to the receiver baffle (23) on one side close to the collecting funnel (21).
6. A carbonization reaction tower for preparing light calcium carbonate according to claim 5, characterized in that: The self-locking receiver for micro-products comprises a connecting plate (24), wherein the connecting plate (24) is fixedly mounted on one end of the receiver baffle (23) and the receiver conduit (22) for rotational connection, and a counterweight (25) is fixedly mounted on one end of the connecting plate (24) away from the receiver baffle (23), and the sinking of the counterweight (25) can drive the receiver baffle (23) to tilt upward and close the receiver conduit (22).
7. A carbonization reaction tower for preparing light calcium carbonate according to claim 1, characterized in that: A smoke outlet is arranged at the center of the top of the reaction tower (11), and a filter screen (18) is fixedly installed on the end surface. The filter screen (18) adopts a multi-layer filter screen structure with different apertures.