Reactor for efficiently preparing liquid sodium carbonate

Abstract

The invention relates to the technical field of sodium carbonate reaction equipment, in particular to a reactor for efficiently preparing liquid sodium carbonate, which comprises a tank body and an aeration pipe assembly, the aeration pipe assembly is fixed on the inner side of the lower part of the tank body, and the aeration pipe assembly comprises an aeration main pipe and an aeration branch pipe; a plurality of aeration branch pipes are respectively communicated between the two sides of the aeration main pipe and the inner wall of the tank body, aeration holes are distributed in each aeration branch pipe, the horizontal plane of each aeration hole inclines downwards, the inclination angle is an acute angle, a gas outlet is formed in the top of the tank body, a feeding port is formed in the upper part of the tank body, and a sodium carbonate solution discharging port is formed in the bottom of the tank body. According to the reactor for efficiently preparing the liquid sodium carbonate, the reaction efficiency of carbon dioxide and sodium hydroxide in tail gas can be improved, CO2 gas in the tail gas is recycled, the emission of the carbon dioxide is reduced, a sodium carbonate product is obtained, and the economic benefits of enterprises are improved.

Description

Technical Field

[0001] The invention relates to the technical field of sodium carbonate reaction equipment and is a reactor for efficiently preparing liquid sodium carbonate. Background Art

[0002] The idea of ​​preparing liquid sodium carbonate is to use carbon dioxide in industrial exhaust gas as the carbon source and sodium hydroxide produced by the chlor-alkali industry as the sodium source. However, during the industrialization process, problems such as slow reaction rate due to low carbon dioxide concentration in exhaust gas, crystallization during the transmission process of the synthesized liquid sodium carbonate, and heat release from the synthesis reaction that causes the reactor temperature to rise, resulting in alkali corrosion, leading to fluctuations in the quality of the sodium carbonate, were encountered. Summary of the invention

[0003] The present invention provides a high-efficiency reactor for preparing liquid sodium carbonate, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problem of slow reaction rate in the process of preparing liquid sodium carbonate.

[0004] The technical scheme of the present invention is achieved through the following measures: a highly efficient liquid sodium carbonate preparation reactor, comprising a tank body and an aeration pipe assembly, wherein the aeration pipe assembly is fixed on the inner side of the lower part of the tank body, the aeration pipe assembly comprises an aeration main pipe and an aeration branch pipe, the air inlet end of the aeration main pipe is fixedly connected with an aeration air inlet pipe, and a plurality of aeration branch pipes are respectively connected between the two sides of the aeration main pipe and the inner wall of the tank body, each aeration branch pipe is distributed with an aeration hole, and the aeration holes are all inclined downward from the horizontal plane, and the inclination angle is an acute angle, a gas outlet is arranged on the top of the tank body, a feed inlet is arranged on the upper part of the tank body, and a sodium carbonate solution discharge port is arranged on the bottom of the tank body.

[0005] The aeration holes, which are tilted 45 degrees downward from the horizontal plane, are designed to allow bubbles to circulate upward from bottom to top, forming turbulence and thereby enhancing mass transfer and improving the reaction efficiency of carbon dioxide and sodium hydroxide.

[0006] The following are further optimizations and / or improvements to the above technical solutions: The upper part of the tank body may be provided with a sodium carbonate solution circulation interface.

[0007] The sodium carbonate solution circulation interface is connected to a circulation pipeline, and the sodium carbonate solution discharged from the bottom of the tank body is refluxed into the tank body through the circulation pipeline.

[0008] The air inlet of the aeration air inlet pipe can extend out of the tank body.

[0009] A demister may be provided at the gas outlet.

[0010] The lower part of the tank body may be provided with a remote temperature meter interface, a remote liquid level meter interface and a PH detection interface respectively.

[0011] A manhole may be provided at the lower portion of the tank body.

[0012] The tank body is also provided with an inspection port.

[0013] The high-efficiency liquid sodium carbonate preparation reactor of the present invention can improve the reaction efficiency of carbon dioxide in tail gas and sodium hydroxide, not only recovers and reuses CO2 gas in tail gas to reduce carbon dioxide emissions, but also obtains sodium carbonate products, thereby improving the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 It is a schematic diagram of the main perspective structure of the present invention.

[0015] Attached Figure 2 Schematic diagram of the top view of the reactor for efficiently preparing liquid sodium carbonate.

[0016] Attached Figure 3 It is a schematic diagram of the cross-sectional structure along the AA direction.

[0017] The codes in the accompanying drawings are: 1 is the tank body, 2 is the aeration main pipe, 3 is the aeration branch pipe, 4 is the aeration air inlet pipe, 5 is the aeration hole, 6 is the gas outlet, 7 is the feed inlet, 8 is the sodium carbonate solution discharge port, 9 is the sodium carbonate solution circulation interface, 10 is the demister, 11 is the remote thermometer interface, 12 is the remote liquid level gauge interface, 13 is the PH detection interface, and 14 is the manhole. DETAILED DESCRIPTION

[0018] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0019] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 The layout direction is determined by the

[0020] The present invention will be further described below in conjunction with embodiments: Embodiment 1: As attached Figures 1 to 3 As shown, the high-efficiency liquid sodium carbonate preparation reactor comprises a tank body 1 and an aeration pipe assembly, wherein the aeration pipe assembly is fixed on the inner side of the lower part of the tank body 1, and the aeration pipe assembly comprises an aeration main pipe 2 and an aeration branch pipe 3. The air inlet end of the aeration main pipe 2 is fixedly connected with an aeration air inlet pipe 4, and the two sides of the aeration main pipe 2 are respectively connected with the inner wall of the tank body 1 with a plurality of aeration branch pipes 3, and each aeration branch pipe 3 is distributed with an aeration hole 5, and the aeration holes 5 are all inclined downward from the horizontal plane, and the inclination angle is an acute angle (see FIG. Figure 3 ), a gas outlet 6 is provided at the top of the tank body 1, a feed inlet 7 is provided at the upper part of the tank body 1, and a sodium carbonate solution discharge port 8 is provided at the bottom of the tank body 1.

[0021] The downward inclination angle of the horizontal plane is preferably 45 degrees. The aeration holes 5 inclined downward at 45 degrees from the horizontal plane are designed to allow bubbles to circulate upward from bottom to top, forming turbulence and thereby enhancing mass transfer and improving the reaction efficiency of carbon dioxide and sodium hydroxide.

[0022] When the sodium carbonate solution discharge port 8 is connected to an external discharge pipeline to discharge the sodium carbonate solution, a steam purge method can be used to increase the temperature of the sodium carbonate solution and solve the crystallization problem during the transmission of the sodium carbonate solution. A conventional high temperature resistant and alkali corrosion resistant protective layer can be coated on the inner wall of the tank body 1 to protect the reactor and avoid corrosion.

[0023] Embodiment 2: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, a sodium carbonate solution circulation interface 9 is provided on the upper part of the tank body 1.

[0024] The sodium carbonate solution circulation interface 9 is connected to a circulation pipeline, and the sodium carbonate solution discharged from the bottom of the tank body 1 is refluxed into the tank body 1 through the circulation pipeline, so as to further increase the contact time between carbon dioxide and sodium hydroxide, strengthen mass transfer, and improve the reaction effect.

[0025] Embodiment 3: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, the air inlet of the aeration air inlet pipe 4 extends out of the tank body 1.

[0026] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, a demister 10 is provided at the gas outlet 6 .

[0027] The demister 10 may be a wire mesh demister.

[0028] Embodiment 5: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, a remote temperature meter interface 11, a remote liquid level meter interface 12 and a PH detection interface 13 are respectively provided at the lower part of the tank body 1.

[0029] Embodiment 6: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, a manhole 14 is provided at the lower part of the tank body 1.

[0030] According to the structural design of the efficient liquid sodium carbonate preparation reactor, the liquid sodium carbonate reactor can be designed as follows: The height of tank 1 is 5m, the inner diameter is 6.5m, and the volume of tank 1 is 165m 3 The aeration pipe assembly can be designed with 16 aeration branches 3, each of which has a length of 2000 mm to 3000 mm and a diameter of 160 mm, and 120 to 180 aeration holes 5 can be provided with a hole diameter of 8 mm. Multiple aeration holes 5 are designed to fully form turbulent flow.

[0031] This liquid sodium carbonate reactor uses NaOH solution to absorb CO2 gas in tail gas to produce Na2CO3. It is an advanced, effective, economical and advanced technology that can immediately achieve carbon emission reduction for enterprises in the northwest region. NaOH solution and industrial water enter the tank body 1 through the feed port 7, and the tail gas CO2 enters the tank body 1 through the aeration inlet pipe 4. After the NaOH solution absorbs CO2 gas to produce Na2CO3, the CO2 gas in the tail gas is reused to achieve carbon emission reduction. With the company's production capacity, carbon dioxide emissions can be reduced by 4,000 tons per year. At the same time, it eliminates the environmental problems of operational risks, occupational health hazards, dust generation, and difficult handling of packaging materials in the sodium carbonate configuration process.

[0032] Economic benefits: After the efficient preparation of liquid sodium carbonate reactor uses NaOH solution to absorb CO2 gas to produce Na2CO3, our company can save 6 million yuan in production costs each year. If it completely replaces the use of sodium carbonate in Xinjiang, it can generate a profit of 80 million yuan each year, with considerable economic benefits.

[0033] Xinjiang uses about 100,000 tons of sodium carbonate each year, which is mainly purchased from other places, and the logistics cost accounts for about 50% of the product price. If the technology developed in this project is used to supply the sodium carbonate demand in Xinjiang, it can fill the gap in Xinjiang's soda ash industry, reduce the purchase price of sodium carbonate for users in Xinjiang, and reduce the carbon emissions of chlor-alkali enterprises. Of course, for different industrial tail gases, it is necessary to conduct a full component analysis to determine the composition that affects the product quality, and design relevant processes to remove impurities before it can be used for sodium carbonate synthesis.

[0034] In summary, the efficient liquid sodium carbonate preparation reactor of the present invention can improve the reaction efficiency of carbon dioxide in tail gas and sodium hydroxide, not only recover and reuse CO2 gas in tail gas and reduce carbon dioxide emissions, but also obtain sodium carbonate products and improve the economic benefits of the enterprise.

[0035] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A reactor for efficiently preparing liquid sodium carbonate, characterized in that It includes a tank body and an aeration pipe assembly. The aeration pipe assembly is fixed on the inner side of the lower part of the tank body. The aeration pipe assembly includes an aeration main pipe and an aeration branch pipe. The air inlet end of the aeration main pipe is fixedly connected with the aeration air inlet pipe. Both sides of the aeration main pipe are respectively connected with a plurality of aeration branch pipes. Each aeration branch pipe is provided with an aeration hole. The aeration holes are all inclined downward from the horizontal plane with an acute angle. A gas outlet is arranged on the top of the tank body, a feed inlet is arranged on the upper part of the tank body, and a sodium carbonate solution discharge port is arranged on the bottom of the tank body.

2. The highly efficient liquid sodium carbonate reactor according to claim 1, characterized in that A sodium carbonate solution circulation interface is provided on the upper part of the tank body; or / and, the downward inclination angle of the aeration hole is preferably 45 degrees.

3. The high-efficiency liquid sodium carbonate reactor according to claim 1 or 2, characterized in that The air inlet of the aeration air inlet pipe extends out of the tank body.

4. The high-efficiency liquid sodium carbonate reactor according to claim 1 or 2, characterized in that A demister is provided at the gas outlet.

5. The high-efficiency liquid sodium carbonate preparation reactor according to claim 3, characterized in that A demister is provided at the gas outlet.

6. The highly efficient liquid sodium carbonate reactor according to claim 1, 2 or 5, characterized in that The lower part of the tank body is respectively provided with a remote thermometer interface, a remote liquid level gauge interface and a PH detection interface.

7. The high-efficiency liquid sodium carbonate preparation reactor according to claim 3, characterized in that The lower part of the tank body is respectively provided with a remote thermometer interface, a remote liquid level gauge interface and a PH detection interface.

8. The high efficiency liquid sodium carbonate preparation reactor according to claim 4, characterized in that The lower part of the tank body is respectively provided with a remote thermometer interface, a remote liquid level gauge interface and a PH detection interface.

9. The highly efficient liquid sodium carbonate reactor according to claim 1 or 2 or 5 or 7 or 8, characterized in that A manhole is provided at the lower part of the tank body.

10. The high-efficiency liquid sodium carbonate preparation reactor according to claim 6, characterized in that A manhole is provided at the lower part of the tank body.

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