Carbonization reactor for preparing sodium carbonate from carbon dioxide

Abstract

The utility model belongs to the technical field of reaction equipment, and particularly relates to a carbonization reactor for preparing sodium carbonate by using carbon dioxide. Aiming at the problem that the mixing effect needs to be improved in the prior art, the utility model provides a carbonization reactor for preparing sodium carbonate by utilizing carbon dioxide, which comprises an outer shell with a reaction cavity inside, and a material outlet is formed in the bottom of the outer shell. The carbon dioxide feeding assembly and the sodium silicate feeding assembly are fixedly connected to the outer shell, one end of the carbon dioxide feeding assembly extends into the outer shell and is provided with a carbon dioxide outlet communicated with the reaction cavity, and the carbon dioxide outlet is located below the sodium silicate feeding assembly. According to the carbonization reactor provided by the utility model, in the reaction process, gas and liquid which react with each other move and are mixed in two opposite directions, and the gas and the liquid have a larger contact area and can be mixed more uniformly, so that the final reaction has a higher conversion rate.

Description

Technical Field

[0001] The utility model belongs to the technical field of reaction equipment, and in particular relates to a carbonization reactor for preparing sodium carbonate by utilizing carbon dioxide. Background Art

[0002] Reactors are equipment used to carry out reaction processes and are widely used in the chemical, oil refining, and metallurgical industries. They are used to carry out single-phase liquid reactions as well as multiphase reactions such as liquid-liquid, gas-liquid, liquid-solid, and gas-liquid-solid. The reaction of carbon dioxide and sodium silicate to produce sodium carbonate is a gas-liquid reaction. However, the reactors used in existing technologies for this reaction mostly employ a stirring and mixing method, which leaves much to be desired and does not guarantee a high conversion rate.

[0003] For example, a Chinese utility model patent discloses a double-layer stirred carbonization reactor [Application Number: CN201520562407.3]. This utility model includes a reactor, a feed port, a discharge port, an air inlet, a frame, a motor, a reducer, a drive shaft, and an agitator. The air inlet is located at the bottom of the reactor. The agitator is characterized by a double-layer stirring design: the upper layer is a four-blade propeller agitator, and the lower layer is a straight-blade split-disc turbine agitator. The upper layer agitator has a larger diameter than the lower layer agitator.

[0004] This utility model can achieve the advantage of having a good stirring effect, but it still adopts the traditional technical solution of stirring and mixing reaction. When applied to a gas-liquid reaction system, the mixing effect still needs to be further improved. Utility Model Content

[0005] The purpose of the utility model is to provide a carbonization reactor for preparing sodium carbonate using carbon dioxide in order to solve the above problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A carbonization reactor for preparing sodium carbonate using carbon dioxide comprises an outer shell having a reaction cavity therein, a material outlet being provided at the bottom of the outer shell, and a carbon dioxide feed assembly and a sodium silicate feed assembly fixedly connected to the outer shell, wherein both the carbon dioxide feed assembly and the sodium silicate feed assembly are in communication with the reaction cavity. One end of the carbon dioxide feed assembly extends into the interior of the outer shell and is provided with a carbon dioxide outlet in communication with the reaction cavity, wherein the carbon dioxide outlet is located below the sodium silicate feed assembly.

[0008] In the above-mentioned carbonization reactor for preparing sodium carbonate using carbon dioxide, a mixing plate is further provided between the sodium silicate feeding assembly and the carbon dioxide outlet. The mixing plate is fixedly connected to the inner surface of the outer shell, and the mixing plate is provided with a plurality of through holes penetrating the mixing plate.

[0009] In the above-mentioned carbonization reactor for preparing sodium carbonate using carbon dioxide, the mixing plates are provided with a plurality of mutually parallel mixing plates, and the mixing plates are arranged in sequence along the axis direction of the reaction cavity.

[0010] In the above-mentioned carbonization reactor for preparing sodium carbonate using carbon dioxide, the carbon dioxide feeding assembly includes a feeding end and a discharging end, the carbon dioxide outlet is arranged on the discharging end, the feeding end is connected to a gas inlet and a liquid inlet, and the gas introduced through the gas inlet and the liquid introduced through the liquid inlet are mixed at the feeding end.

[0011] In the above-mentioned carbonization reactor for preparing sodium carbonate using carbon dioxide, the feed end and the discharge end are connected by a capillary tube, and the inner diameter of the capillary tube is smaller than the inner diameter of the feed end and also smaller than the inner diameter of the discharge end.

[0012] In the above-mentioned carbonization reactor for preparing sodium carbonate using carbon dioxide, the sodium silicate feeding assembly includes a feeding pipe and a material distribution structure that are interconnected. The material distribution structure is provided with a plurality of discharge ports, and the discharge ports are located directly above the carbon dioxide outlet.

[0013] In the above-mentioned carbonization reactor for preparing sodium carbonate using carbon dioxide, the material distribution structure includes a buffer having a buffer cavity inside, the buffer cavity is connected to the feed pipe, and a plurality of discharge pipes are connected to the lower surface of the buffer, the discharge pipes are connected to the buffer cavity, and the discharge port is arranged at the end of the discharge pipe away from the buffer cavity.

[0014] In the above-mentioned carbonization reactor for preparing sodium carbonate using carbon dioxide, the discharge pipe is rotatably connected to the buffer.

[0015] In the above-mentioned carbonization reactor for preparing sodium carbonate using carbon dioxide, the outer shell is further provided with a gas outlet for discharging excess carbon dioxide gas, the gas outlet is connected to the reaction cavity and the gas outlet is located above the sodium silicate feeding assembly.

[0016] In the above-mentioned carbonization reactor for preparing sodium carbonate using carbon dioxide, a cleaning port is further provided on the outer shell, and one end of the cleaning port extends to just above the material outlet.

[0017] Compared with the existing technology, the advantages of this utility model are:

[0018] 1. The utility model provides a carbonization reactor. During the reaction process, the reacting gas and liquid move and mix in opposite directions. Compared with the stirring and mixing method in the prior art, the two have a larger contact area and can be mixed more evenly, so that the final reaction can have a higher conversion rate.

[0019] 2. The utility model is provided with a buffer with a buffer cavity between the feed pipe and the discharge port. The buffer cavity has a certain function of storing liquid. When the flow of the feed pipe is unstable, it can buffer the flow fluctuation of the discharge port and ensure the stability of the liquid discharge from the discharge port.

[0020] 3. The discharge pipe of the utility model adopts a rotating connection method, and the liquid discharge direction can be adjusted according to needs, which can adapt to more application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the sodium silicate feeding assembly;

[0023] In the figure: reaction cavity 1, outer shell 2, material outlet 3, carbon dioxide feed assembly 4, sodium silicate feed assembly 5, carbon dioxide outlet 6, mixing plate 7, gas outlet 8, purge port 9, feed end 41, discharge end 42, gas inlet 43, liquid inlet 44, capillary 45, feed pipe 51, material distribution structure 52, discharge port 53, buffer cavity 54, buffer 55, discharge pipe 56. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0025] like Figure 1 As shown, a carbonization reactor for preparing sodium carbonate using carbon dioxide includes an outer shell 2 with a reaction cavity 1 therein, a material outlet 3 is provided at the bottom of the outer shell 2, and also includes a carbon dioxide feeding assembly 4 and a sodium silicate feeding assembly 5 fixedly connected to the outer shell 2, the carbon dioxide feeding assembly 4 and the sodium silicate feeding assembly 5 are both connected to the reaction cavity 1, one end of the carbon dioxide feeding assembly 4 extends into the interior of the outer shell 2 and is provided with a carbon dioxide outlet 6 connected to the reaction cavity 1, and the carbon dioxide outlet 6 is located below the sodium silicate feeding assembly 5.

[0026] In the present invention, when in use, carbon dioxide is transported to the carbon dioxide outlet 6 through the carbon dioxide feed assembly 4, and enters the reaction cavity 1 through the carbon dioxide outlet 6. The sodium silicate solution enters the reaction cavity 1 through the sodium silicate feed assembly 5. Since the carbon dioxide outlet 6 is located below the sodium silicate feed assembly 5, after entering the reaction cavity 1, the carbon dioxide gas moves upward and the sodium silicate solution moves downward, and they collide with each other in the reaction cavity 1. Therefore, the present invention provides a carbonization reactor, in which the reacting gas and liquid move in opposite directions and mix during the reaction process. In this way, compared with the stirring and mixing method in the prior art, the two have a larger contact area and can be mixed more evenly, so that the final reaction can have a higher conversion rate.

[0027] like Figure 1 As shown, a mixing plate 7 is further provided between the sodium silicate feed assembly 5 and the carbon dioxide outlet 6. The mixing plate 7 is fixedly connected to the inner surface of the outer shell 2 and is provided with a plurality of through holes extending therethrough. The sodium silicate solution forms a liquid film on the surface of the mixing plate 7, while the carbon dioxide gas can only be ejected through the through holes in the mixing plate 7. Therefore, the gas and liquid phases are intensely mixed at the through holes, thereby ensuring a good mixing effect.

[0028] Preferably, the mixing plates 7 are provided with a plurality of mutually parallel pieces, and the mixing plates 7 are sequentially arranged along the axis direction of the reaction cavity 1. The provision of a plurality of mutually parallel mixing plates 7 can cause the gas-liquid two phases to be mixed vigorously several times, thereby further ensuring the mixing effect.

[0029] like Figure 1 As shown, the carbon dioxide feeding assembly 4 includes a feeding end 41 and a discharging end 42, and the carbon dioxide outlet 6 is arranged on the discharging end 42. The feeding end 41 is connected to a gas inlet 43 and a liquid inlet 44, and the gas introduced through the gas inlet 43 and the liquid introduced through the liquid inlet 44 are mixed at the feeding end 41.

[0030] Water enters from the liquid inlet 44 and is preliminarily mixed and dissolved with the carbon dioxide gas at the feed end 41 to ensure the reaction proceeds.

[0031] Preferably, the feed end 41 and the discharge end 42 are connected via a thin tube 45 , and the inner diameter of the thin tube 45 is smaller than the inner diameter of the feed end 41 and also smaller than the inner diameter of the discharge end 42 .

[0032] At the narrow tube 45 with a smaller inner diameter, the mixed material experiences an increased flow rate and a decreased pressure, creating a Venturi effect. This creates a suction force that facilitates the subsequent entry of carbon dioxide gas. After the mixed material is ejected from the carbon dioxide outlet 6, a certain amount of mist is also formed. At this time, the carbon dioxide rises in the form of bubbles, and the bubbles carry the mist into contact with the sodium silicate solution, enhancing the reaction efficiency while also eliminating mist entrainment.

[0033] Combine Figure 1 and Figure 2 As shown, the sodium silicate feeding assembly 5 includes a feeding pipe 51 and a material distribution structure 52 that are interconnected. The material distribution structure 52 is provided with a plurality of discharge ports 53 , and the discharge ports 53 are located directly above the carbon dioxide outlet 6 .

[0034] Specifically, the material distribution structure 52 includes a buffer 55 with a buffer cavity 54 inside, the buffer cavity 54 is connected to the feed pipe 51, and a plurality of discharge pipes 56 are connected to the lower surface of the buffer 55, the discharge pipes 56 are connected to the buffer cavity 54, and the discharge port 53 is arranged at one end of the discharge pipe 56 away from the buffer cavity 54.

[0035] The utility model provides a buffer 55 with a buffer cavity 54 between the feed pipe 51 and the discharge port 53. The buffer cavity 54 has a certain function of storing liquid. When the flow of the feed pipe is unstable, it can buffer the flow fluctuation of the discharge port 53 and ensure the stability of the liquid discharge from the discharge port 53.

[0036] Preferably, the discharge pipe 56 is rotatably connected to the buffer 55. The discharge pipe 56 of the present invention adopts a rotatable connection method, and the liquid discharge direction can be adjusted as needed, which can adapt to more application scenarios.

[0037] like Figure 1 As shown, the outer shell 2 is further provided with a gas outlet 8 for discharging excess carbon dioxide gas. The gas outlet 8 is communicated with the reaction cavity 1 and is located above the sodium silicate feeding assembly 5 .

[0038] like Figure 1 As shown, the outer shell 2 is further provided with a cleaning port 9, one end of which extends to just above the material outlet 3. The cleaning port 9 can facilitate cleaning of the material blocked at the material outlet 3 during later maintenance.

[0039] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0040] Although the terms reaction cavity 1, outer shell 2, material outlet 3, carbon dioxide feed assembly 4, sodium silicate feed assembly 5, carbon dioxide outlet 6, mixing plate 7, gas outlet 8, purge port 9, feed end 41, discharge end 42, gas inlet 43, liquid inlet 44, capillary 45, feed pipe 51, material distribution structure 52, discharge port 53, buffer cavity 54, buffer 55, and discharge pipe 56 are frequently used herein, the use of other terms is not excluded. These terms are used merely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A carbonization reactor for preparing sodium carbonate using carbon dioxide, comprising an outer shell (2) having a reaction cavity (1) therein, a material outlet (3) being provided at the bottom of the outer shell (2), and further comprising a carbon dioxide feed assembly (4) and a sodium silicate feed assembly (5) fixedly connected to the outer shell (2), wherein the carbon dioxide feed assembly (4) and the sodium silicate feed assembly (5) are both in communication with the reaction cavity (1), characterized in that: One end of the carbon dioxide feed assembly (4) extends to the interior of the outer shell (2) and is provided with a carbon dioxide outlet (6) connected to the reaction cavity (1), and the carbon dioxide outlet (6) is located below the sodium silicate feed assembly (5).

2. A carbonization reactor for preparing sodium carbonate using carbon dioxide as claimed in claim 1, characterized in that: A mixing plate (7) is further provided between the sodium silicate feeding assembly (5) and the carbon dioxide outlet (6). The mixing plate (7) is fixedly connected to the inner surface of the outer shell (2). The mixing plate (7) is provided with a plurality of through holes penetrating the mixing plate (7).

3. A carbonization reactor for preparing sodium carbonate using carbon dioxide as claimed in claim 2, characterized in that: The mixing plates (7) are provided with a plurality of mutually parallel pieces, and the mixing plates (7) are arranged in sequence along the axis direction of the reaction cavity (1).

4. A carbonization reactor for preparing sodium carbonate using carbon dioxide as claimed in claim 1, characterized in that: The carbon dioxide feed assembly (4) comprises a feed end (41) and a discharge end (42), the carbon dioxide outlet (6) being arranged on the discharge end (42), the feed end (41) being connected to a gas inlet (43) and a liquid inlet (44), and the gas introduced through the gas inlet (43) and the liquid introduced through the liquid inlet (44) being mixed at the feed end (41).

5. A carbonization reactor for preparing sodium carbonate using carbon dioxide as claimed in claim 4, characterized in that: The feed end (41) and the discharge end (42) are connected via a thin tube (45), and the inner diameter of the thin tube (45) is smaller than the inner diameter of the feed end (41) and also smaller than the inner diameter of the discharge end (42).

6. A carbonization reactor for preparing sodium carbonate using carbon dioxide as claimed in claim 1, characterized in that: The sodium silicate feeding assembly (5) comprises a feeding pipe (51) and a material distribution structure (52) which are interconnected. The material distribution structure (52) is provided with a plurality of discharge ports (53), and the discharge ports (53) are located directly above the carbon dioxide outlet (6).

7. A carbonization reactor for preparing sodium carbonate using carbon dioxide as claimed in claim 6, characterized in that: The material distribution structure (52) includes a buffer (55) having a buffer cavity (54) therein, the buffer cavity (54) is connected to the feed pipe (51), a plurality of discharge pipes (56) are connected to the lower surface of the buffer (55), the discharge pipes (56) are connected to the buffer cavity (54), and the discharge port (53) is arranged at one end of the discharge pipe (56) away from the buffer cavity (54).

8. A carbonization reactor for preparing sodium carbonate using carbon dioxide as claimed in claim 7, characterized in that: The discharge pipe (56) is rotatably connected to the buffer (55).

9. A carbonization reactor for preparing sodium carbonate using carbon dioxide as claimed in claim 1, characterized in that: The outer shell (2) is also provided with a gas outlet (8) for discharging excess carbon dioxide gas. The gas outlet (8) is communicated with the reaction cavity (1) and is located above the sodium silicate feeding assembly (5).

10. A carbonization reactor for preparing sodium carbonate using carbon dioxide according to claim 1, characterized in that: The outer shell (2) is also provided with a cleaning port (9), one end of which extends to just above the material outlet (3).

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