Carbonization reaction device

Abstract

The utility model relates to a carbonization reaction device which comprises a reaction box and a circulating mechanism, a first reaction tank, a second reaction tank and a third reaction tank are sequentially arranged in the reaction box, and a first gas pipeline leading to the inner bottom of the first reaction tank is arranged on the outer side of the reaction box. A second gas pipeline leading to the bottom in the second reaction tank is arranged at the top in the first reaction tank, a third gas pipeline leading to the bottom in the third reaction tank is arranged at the top in the second reaction tank, and an exhaust pipe leading to the outer side of the reaction box is arranged at the top in the third reaction tank; supplementing pipelines are arranged on the first reaction tank, the second reaction tank and the third reaction tank, a conveying pipeline is arranged at the bottom of the first reaction tank, one end of the circulating mechanism is connected with the bottoms of the second reaction tank and the third reaction tank, and the other end of the circulating mechanism is led into the first reaction tank. According to the utility model, the tail gas of the calcined limestone can be fully utilized, and the carbonization reaction efficiency can also be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of carbonization, in particular to a carbonization reaction device. Background Art

[0002] Calcium carbonate is an inorganic compound and the main component of limestone, marble, etc. Calcium carbonate is usually white crystals, tasteless, and basically insoluble in water. Among the preparation technologies of calcium carbonate, the most widely used is the carbonization method, that is, carbon dioxide gas is introduced into lime milk to obtain calcium carbonate precipitation, and then calcium carbonate is obtained through centrifuges and other equipment. However, the existing preparation methods have a low utilization rate of carbon dioxide, and the prepared calcium carbonate contains a certain amount of by-products, making it difficult to obtain relatively pure calcium carbonate. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a carbonization reaction device, which can fully utilize the tail gas of calcined limestone and improve the efficiency of the carbonization reaction.

[0004] The technical solution of the utility model is: a carbonization reaction device, comprising a reaction box and a circulation mechanism, wherein a first reaction pool, a second reaction pool and a third reaction pool are sequentially arranged in the reaction box, a first gas pipeline leading to the bottom of the first reaction pool is arranged on the outside of the reaction box, a second gas pipeline leading to the bottom of the second reaction pool is arranged on the top of the first reaction pool, a third gas pipeline leading to the bottom of the third reaction pool is arranged on the top of the second reaction pool, an exhaust pipe leading to the outside of the reaction box is arranged on the top of the third reaction pool, supplementary pipelines are arranged on the first reaction pool, the second reaction pool and the third reaction pool are arranged on the bottom of the first reaction pool, a conveying pipeline is arranged on the bottom of the first reaction pool, one end of the circulation mechanism is connected to the bottoms of the second reaction pool and the third reaction pool, and the other end of the circulation mechanism leads to the first reaction pool.

[0005] Furthermore, a solenoid valve is provided on the first gas transmission pipeline.

[0006] Furthermore, a detection instrument is provided on the exhaust pipe.

[0007] Furthermore, the detection instrument is a carbon dioxide concentration detection instrument.

[0008] Furthermore, a delivery pump is provided on the delivery pipeline.

[0009] Furthermore, a height-increasing bracket is provided at the lower end of the reaction box.

[0010] Furthermore, the lower ends of the first reaction tank, the second reaction tank and the third reaction tank are all funnel-shaped.

[0011] Furthermore, the lower ends of the first gas pipeline, the second gas pipeline and the third gas pipeline are all threadedly connected with nozzles.

[0012] Furthermore, the nozzle is honeycomb-shaped.

[0013] Furthermore, the circulation mechanism includes a connected circulation pump and a circulation pipeline, one end of the circulation pump is respectively connected to the bottom of the second reaction tank and the third reaction tank, and the other end of the circulation pump leads to the first reaction tank through the circulation pipeline.

[0014] Compared with the prior art, the utility model has the advantages of utilizing the carbon dioxide gas with heat generated by calcining limestone and making full use of the carbon dioxide gas through a three-stage reaction tank, thereby reducing the amount of industrially prepared carbon dioxide gas and utilizing its heat to heat the mixed liquid, thereby reducing the content of by-products generated when preparing calcium carbonate precipitation through carbonization reaction and improving the purity of calcium carbonate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 This is a working principle diagram of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the nozzle of the utility model.

[0019] Among them: 1. Reaction box; 2. Heightening bracket; 3. First reaction pool; 4. Second reaction pool; 5. Third reaction pool; 6. Supplementary pipeline; 7. First gas pipeline; 8. Solenoid valve; 9. Exhaust pipe; 10. Carbon dioxide concentration detection instrument; 11. Second gas pipeline; 12. Third gas pipeline; 13. Nozzle; 14. Circulation pump; 15. Circulation pipeline; 16. Delivery pump; 17. Delivery pipeline. DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0021] like Figure 1-3As shown, a carbonization reaction device comprises a reaction box 1 and a circulation mechanism, wherein the reaction box 1 is provided with a first reaction pool 3, a second reaction pool 4 and a third reaction pool 5 capable of storing lime milk in sequence, a first gas pipeline 7 leading to the bottom of the first reaction pool 3 is provided on the outside of the reaction box 1, a second gas pipeline 11 leading to the bottom of the second reaction pool 4 is provided on the top of the first reaction pool 3, a third gas pipeline 12 leading to the bottom of the third reaction pool 5 is provided on the top of the second reaction pool 4, and an exhaust pipe 9 leading to the outside of the reaction box 1 is provided on the top of the third reaction pool 5 to react with the lime milk The carbon dioxide gas passes through the first gas pipeline 7, the second gas pipeline 11, the third gas pipeline 12 and the exhaust pipe 9 in sequence. The first reaction tank 3, the second reaction tank 4 and the third reaction tank 5 are each provided with a supplementary pipeline 6, which can replenish lime milk to the three reaction tanks in time. A conveying pipeline 17 is provided at the bottom of the first reaction tank 3 for extracting the calcium carbonate precipitate. One end of the circulation mechanism is connected to the bottom of the second reaction tank 4 and the third reaction tank 5, and the other end of the circulation mechanism leads to the first reaction tank 3, which is used to convey the calcium carbonate precipitate and the lime milk mixture to the first reaction tank 3.

[0022] In the above embodiment, the first gas pipeline 7 is provided with a solenoid valve 8, which can control the carbon dioxide intake flow rate; the exhaust pipe 9 is provided with a detection instrument, which is a carbon dioxide concentration detection instrument 10, which judges the reaction situation in the reaction tank according to the carbon dioxide content, so as to adjust the solenoid valve 8; the delivery pipeline 17 is provided with a delivery pump 16, which provides power for the extraction of calcium carbonate to prevent blockage; the lower end of the reaction box 1 is provided with a heightening bracket 2, which provides sufficient space for the lower installation of the delivery pump 16, reserved interfaces, etc.; the lower ends of the first reaction tank 3, the second reaction tank 4 and the third reaction tank 5 are all funnel-shaped, so that the calcium carbonate is concentrated in the middle after precipitation, which is convenient for extraction;

[0023] In the above embodiment, the lower ends of the first gas pipeline 7, the second gas pipeline 11 and the third gas pipeline 12 are all threadedly connected with nozzles 13 to prevent calcium carbonate from flowing back into the delivery pipeline 17 and facilitate disassembly and cleaning; the nozzle 13 is honeycomb-shaped, which increases the contact area between carbon dioxide gas and lime milk, making the reaction more sufficient and efficient; the circulation mechanism includes a connected circulation pump 14 and a circulation pipeline 15, one end of the circulation pump 14 is respectively connected to the bottom of the second reaction tank 4 and the third reaction tank 5, and the other end of the circulation pump 14 is connected to the first reaction tank 3 through the circulation pipeline 15. The mixed liquid in the second reaction tank 4 and the third reaction tank 5 is collected by the circulation pump 14 and sent back to the first reaction tank 3 for sufficient reaction.

[0024] Description of the working method of this utility model:

[0025] After calcining limestone and the like, lime and carbon dioxide are obtained, wherein lime is mixed with water to form lime milk, which is used as one of the raw materials for preparing calcium carbonate, and another raw material, carbon dioxide, is obtained from the limestone calcining process and supplemented by industrially preparing carbon dioxide; the lime milk is transported to the first reaction tank 3, the second reaction tank 4 and the third reaction tank 5 through the supplementary pipeline 6, and the liquid level height is controlled at a position close to the exhaust pipe 9, and then the carbon dioxide gas is sent to the first reaction tank 3 through the first gas pipeline 7, and the carbon dioxide gas will pass through the second gas pipeline 11 and the third gas pipeline 12 and finally be discharged from the exhaust pipe 9, and will undergo sufficient carbonization reaction with the lime milk in the first reaction tank 3, the second reaction tank 4 and the third reaction tank 5 in turn to generate calcium carbonate precipitate; in this process, the carbon dioxide The concentration of carbon dioxide gas is the highest in the first reaction tank 3, and its reaction efficiency with lime milk is the highest. In the second reaction tank 4 and the third reaction tank 5, the concentration of carbon dioxide gas gradually decreases. Therefore, the calcium carbonate precipitate in the first reaction tank 3 is formed quickly. After the device has been running for a period of time, the calcium carbonate precipitate can be transported to an external centrifuge for dehydration to obtain calcium carbonate. Since the carbon dioxide concentration in the second reaction tank 4 and the third reaction tank 5 is insufficient, the second reaction tank 4 and the third reaction tank 5 obtain a mixture of calcium carbonate precipitate and lime milk after fully utilizing the remaining carbon dioxide gas, and the mixture is pumped into the first reaction tank 3 for re-reaction, which also shortens the speed at which the first reaction tank 3 obtains the calcium carbonate precipitate. Through this cycle, not only the carbon dioxide gas is fully utilized, but also the efficiency of the carbonization reaction is improved.

[0026] Since part of the carbon dioxide gas, one of the raw materials, comes from the calcination of limestone, the carbon dioxide gas carries a certain amount of heat and will continuously exchange heat with the mixed liquid in the reaction pool. When a certain temperature is reached, the by-product of the carbonization reaction, namely calcium bicarbonate, will decompose into calcium carbonate, water and carbon dioxide, further improving the purity of the calcium carbonate precipitate.

[0027] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A carbonization reaction device, comprising a reaction box and a circulation mechanism, characterized in that: The reaction box is provided with a first reaction pool, a second reaction pool and a third reaction pool in sequence, a first gas pipeline leading to the bottom of the first reaction pool is provided on the outside of the reaction box, a second gas pipeline leading to the bottom of the second reaction pool is provided on the top of the first reaction pool, a third gas pipeline leading to the bottom of the third reaction pool is provided on the top of the second reaction pool, an exhaust pipe leading to the outside of the reaction box is provided on the top of the third reaction pool, supplementary pipelines are provided on the first reaction pool, the second reaction pool and the third reaction pool, a conveying pipeline is provided at the bottom of the first reaction pool, one end of the circulation mechanism is connected to the bottom of the second reaction pool and the third reaction pool, and the other end of the circulation mechanism leads to the first reaction pool.

2. The carbonization reaction device according to claim 1, characterized in that: The first gas transmission pipeline is provided with a solenoid valve.

3. The carbonization reaction device according to claim 1, characterized in that: The exhaust pipe is provided with a detection instrument.

4. The carbonization reaction device according to claim 3, characterized in that: The detection instrument is a carbon dioxide concentration detection instrument.

5. The carbonization reaction device according to claim 1, characterized in that: A delivery pump is provided on the delivery pipeline.

6. The carbonization reaction device according to claim 1, characterized in that: A heightening bracket is arranged at the lower end of the reaction box.

7. The carbonization reaction device according to claim 1, characterized in that: The lower ends of the first reaction tank, the second reaction tank and the third reaction tank are all funnel-shaped.

8. The carbonization reaction device according to claim 1, characterized in that: The lower ends of the first gas pipeline, the second gas pipeline and the third gas pipeline are all threadedly connected with nozzles.

9. The carbonization reaction device according to claim 8, characterized in that: The nozzle is honeycomb-shaped.

10. The carbonization reaction device according to claim 1, characterized in that: The circulation mechanism comprises a connected circulation pump and a circulation pipeline. One end of the circulation pump is respectively connected to the bottom of the second reaction tank and the third reaction tank, and the other end of the circulation pump leads to the first reaction tank through the circulation pipeline.

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