Barium carbonate preparation system

Abstract

The barium carbonate preparation system comprises a pre-reaction tank and a carbonization unit, an access hole is formed in the side wall of the pre-reaction tank, an access flange is connected to the access hole in a sealed mode, an interface pipeline is connected to the interior of the access flange in a sealed mode, and the lower end of the pre-reaction tank is connected with a liquid storage tank; at least one carbon dioxide distributor is arranged in the pre-reaction tank, one end, located in the pre-reaction tank, of the interface pipeline is connected with the carbon dioxide distributor, one end, located outside the pre-reaction tank, of the interface pipeline is connected with a gas source, the gas source is used for containing carbon dioxide gas, and the upper end of the pre-reaction tank is connected with a feeding port of the carbonization unit; the feeding port of the carbonization unit is further connected with a discharging pipe, and a first valve is arranged on the discharging pipe. According to the preparation system, the preparation efficiency of barium carbonate can be improved, and barium carbonate crystals with more uniform granularity can be obtained; the preparation system disclosed by the utility model has the advantage of relatively ideal chemical reaction effect.

Description

Technical Field

[0001] This utility model belongs to the field of barium carbonate preparation technology, and specifically relates to a barium carbonate preparation system. Background Technology

[0002] Barium carbonate is an indispensable inorganic functional alkaline earth metal material in modern national economy and science and technology. It is widely recognized as an important strategic functional material, mainly used in the manufacture of various electronic components such as PTC thermistors, ceramic coatings, optical glass, electronic ceramics, pottery, and capacitors. In the preparation of barium carbonate, traditional reaction equipment suffers from problems such as poor reaction effect, low efficiency, uneven particle size distribution, easy clogging, and difficult cleaning. To solve these problems and improve the production quality and efficiency of barium carbonate, a new barium carbonate preparation system is urgently needed. Utility Model Content

[0003] In order to solve all or some of the above problems, the present invention aims to provide a barium carbonate preparation system and preparation method. The barium carbonate preparation system of the present invention can obtain barium carbonate crystals with uniform particle size distribution, thereby improving the quality and production efficiency of barium carbonate.

[0004] According to one aspect of this utility model, a barium carbonate preparation system is provided, including a pre-reaction tank and a carbonization unit. An inspection port is provided on the side wall of the pre-reaction tank, and a maintenance flange is sealed to the inspection port. An interface pipe is sealed to the inside of the maintenance flange. The lower end of the pre-reaction tank is connected to a liquid storage tank, which is used to hold the product of barium sulfide mixed with water. At least one carbon dioxide distributor is provided inside the pre-reaction tank. One end of the interface pipe inside the pre-reaction tank is connected to the carbon dioxide distributor, and the other end of the interface pipe outside the pre-reaction tank is connected to a gas source, which is used to hold carbon dioxide gas. The upper end of the pre-reaction tank is connected to the inlet of the carbonization unit, and the inlet of the carbonization unit is also connected to a discharge pipe, which is equipped with a first valve.

[0005] Furthermore, the carbon dioxide distributor includes a distributor body with an annular closed cavity. The distributor body is provided with a through hole, and the distributor body is connected to the interface pipe through the through hole, so that the gas in the gas source can enter the closed cavity through the interface pipe and the through hole. The distributor body is provided with a plurality of gas outlet holes, and the carbon dioxide gas in the distributor body enters the pre-reaction tank through the gas outlet holes.

[0006] Furthermore, one end of the interface pipe located outside the pre-reaction tank is connected to one end of the first connecting pipe, and the other end of the first connecting pipe is connected to the gas source.

[0007] Furthermore, the pre-reaction tank includes a straight pipe section in the middle, an upper variable-diameter pipe section, and a lower variable-diameter pipe section. The upper variable-diameter pipe section is a tapered section that gradually increases in size from top to bottom until it is equal to the diameter of the straight pipe section. The lower variable-diameter pipe section is a tapered section that gradually increases in size from bottom to top until it is equal to the diameter of the straight pipe section. The lower end of the lower variable-diameter pipe section is connected to the liquid storage tank, and the upper end of the upper variable-diameter pipe section is connected to the feed inlet of the carbonization unit.

[0008] Furthermore, the ratio of the maximum diameter to the minimum diameter of both the upper and lower variable diameter pipe sections is 8:5; the ratio of the height of the straight pipe section to its diameter is 50:11.

[0009] Furthermore, the upper end of the pre-reaction tank is connected to a first connecting pipe, which is connected to the feed inlet of the carbonization unit, and a first regulating valve is provided on the first connecting pipe.

[0010] Furthermore, the lower end of the pre-reaction tank is connected to the liquid storage tank via a second connecting pipe, which is equipped with a second regulating valve and a water pump.

[0011] Furthermore, the carbonization unit includes a plurality of carbonization towers arranged in sequence. The upper end of the pre-reaction tank is connected to the feed inlet of each of the carbonization towers. The feed inlet of each of the carbonization towers is also connected to the discharge pipe. The gas outlet of each carbonization tower except the last one is connected to the feed inlet of the carbonization tower behind it. The gas outlet of the last carbonization tower is connected to a gas collection pipe.

[0012] Furthermore, the gas outlet of each stage of the carbonization tower is connected to one end of a tee, and the other end of each tee is connected to the gas collection pipe through a second connecting pipe. Each second connecting pipe is equipped with a second valve, and the third end of each tee is connected to one end of a third connecting pipe. The other end of the third connecting pipe corresponding to the last stage of the carbonization tower is connected to the feed inlet of the first stage of the carbonization tower. The other end of the third connecting pipe corresponding to each carbonization tower other than the last stage is connected to the feed inlet of the carbonization tower behind it. The third connecting pipe is equipped with a third valve.

[0013] This utility model also provides a method for preparing barium carbonate, using the preparation system described in any one of the above-mentioned methods, the preparation method comprising the following steps:

[0014] The product obtained by mixing barium sulfide and water in the liquid storage tank is introduced into the pre-reaction tank. Carbon dioxide gas is introduced into the pre-reaction tank through the gas source, so that the carbon dioxide gas comes into contact with barium hydroxide through the carbon dioxide distributor and undergoes a pre-reaction to obtain crystal nuclei.

[0015] The pre-reacted crystal nuclei are introduced into the carbonization unit so that the crystal nuclei grow into barium carbonate crystals within the carbonization unit.

[0016] As can be seen from the above technical solution, the barium carbonate preparation system provided by this utility model has the following beneficial effects:

[0017] It boasts high efficiency, enabling rapid and effective pre-reaction processes for barium carbonate preparation through optimized structural design and precise component configuration; the carbon dioxide distributor ensures uniform carbon dioxide distribution, and the variable diameter pipe design optimizes material flow, significantly improving reaction efficiency.

[0018] It has the advantage of high stability. The coordinated work of components such as regulating valves, water pumps and motors ensures the stability of the equipment operation, accurately controls the inflow and outflow of materials, ensures the stable progress of the pre-reaction process, and thus improves the stability of product quality.

[0019] It boasts advantages in energy conservation and environmental protection. During the pre-reaction process, the system fully utilizes carbon dioxide and barium hydroxide for the reaction, reducing resource waste. Simultaneously, its rational structural design also lowers energy consumption, meeting the requirements of energy conservation and environmental protection.

[0020] It has the advantages of being easy to clean: it is not prone to clogging, is easy to clean, reduces equipment maintenance costs, and improves production efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a barium carbonate preparation system according to an embodiment of the present invention;

[0022] Figure 2 This is another schematic diagram of the barium carbonate preparation system according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the pre-reaction tank portion of an embodiment of the present invention;

[0024] The attached diagram is labeled as follows: Pre-reaction tank 01, carbonization tower 02, discharge pipe 03, first valve 04, second connecting pipe 05, gas collection pipe 06, second valve 07, third connecting pipe 08, third valve 09, carbon dioxide distributor 010, gas outlet 0101, first connecting pipe 011, first regulating valve 012, first connecting pipe 013, liquid storage tank 014, second connecting pipe 015, second regulating valve 016, water pump 017, motor 018, interface pipe 019, maintenance flange 020. Detailed Implementation

[0025] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a barium carbonate preparation system and method according to this utility model.

[0026] like Figure 1 , Figure 2 , Figure 3 As shown, this invention illustrates a barium carbonate preparation system according to an embodiment of the present invention, including a pre-reaction tank 01 and a carbonization unit. An inspection port is provided on the side wall of the pre-reaction tank 01, and a maintenance flange 020 is sealed to the inspection port. An interface pipe 019 is sealed inside the maintenance flange 020. The lower end of the pre-reaction tank 01 is connected to a liquid storage tank 014, which is used to hold the product obtained by mixing barium sulfide with water. At least one carbon dioxide distributor 010 is provided inside the pre-reaction tank 01. One end of the interface pipe 019 inside the pre-reaction tank 01 is connected to the carbon dioxide distributor 010, and the other end of the interface pipe 019 outside the pre-reaction tank 01 is connected to a gas source for holding carbon dioxide gas. The upper end of the pre-reaction tank 01 is connected to the inlet of the carbonization unit, which is also connected to a discharge pipe 03. A first valve 04 is provided on the discharge pipe 03.

[0027] The barium carbonate preparation system of this embodiment includes a pre-reaction tank 01 and a carbonation unit. The pre-reaction tank 01 is equipped with at least one carbon dioxide distributor 010, which is connected to a gas source containing carbon dioxide gas. The pre-reaction tank 01 is connected to a liquid storage tank 014, which contains barium sulfide and water. After mixing barium sulfide and water, barium hydroxide and barium hydrosulfide are obtained. In this embodiment, barium hydroxide solution is used to prepare barium carbonate.

[0028] In the specific preparation process, barium hydroxide solution enters the pre-reaction tank 01, and carbon dioxide enters the pre-reaction tank 01 through the carbon dioxide distributor 010. After the barium hydroxide solution comes into contact with the carbon dioxide, it begins to react and generate crystal nuclei. Subsequently, the material in the pre-reaction tank 01 enters the carbonization unit, where the crystal nuclei grow into barium carbonate crystals.

[0029] The carbon dioxide distributor 010 in this embodiment is designed to ensure sufficient contact between carbon dioxide gas and barium hydroxide solution, thereby enabling rapid pre-reaction to form crystal nuclei. The inspection port in this embodiment facilitates easy removal and replacement of the carbon dioxide distributor 010 should it malfunction.

[0030] The preparation system of this embodiment can improve the preparation efficiency of barium carbonate and obtain barium carbonate crystals with more uniform particle size; the preparation system of this embodiment has the advantage of relatively ideal chemical reaction effect.

[0031] Finally, since the system for preparing barium carbonate in this embodiment consumes carbon dioxide and generates hydrogen sulfide gas during the preparation process, the system can also be used to purify the prepared hydrogen sulfide gas, i.e., reduce the carbon dioxide content in the hydrogen sulfide gas. Specifically, during purification, the gas source is used to hold the hydrogen sulfide gas to be purified, while the liquid in liquid storage tank 014 remains unchanged. The purification principle is to use barium hydroxide solution to absorb the carbon dioxide gas in the hydrogen sulfide gas; the hydrogen sulfide purification process can also achieve barium carbonate precipitation.

[0032] The carbon dioxide distributor 010 includes a distributor body with an annular closed cavity. The distributor body is provided with a through hole, and the distributor body is connected to an interface pipe through the through hole so that the gas in the gas source can enter the closed cavity through the interface pipe and the through hole. The distributor body is provided with a number of gas outlet holes 0101, and the carbon dioxide gas in the distributor body enters the pre-reaction tank 01 through the gas outlet holes 0101.

[0033] In this embodiment, the gas from the gas source enters the closed cavity through the through-hole on the distributor body, and the gas in the closed cavity enters the pre-reaction tank 01 through the outlet. The outlet in this embodiment allows carbon dioxide to be evenly distributed in the pre-reaction tank 01, ensuring sufficient contact between the carbon dioxide gas and the barium hydroxide solution. Specifically, for example, two distributor bodies are installed in the pre-reaction tank 01, each with 8-10 small holes. Again, the inclusion of the inspection port and flange facilitates maintenance or replacement of the carbon dioxide distributor 010 when its outlet is blocked.

[0034] The interface pipe is located outside the pre-reaction tank, with one end connected to one end of the first connecting pipe, and the other end of the first connecting pipe connected to the gas source. When two distributor bodies are installed inside the pre-reaction tank 01, the two distributor bodies can be connected to one end of the interface pipe via a tee. The first connecting pipe 011 is preferably DN20.

[0035] The pre-reaction tank 01 includes a straight pipe section in the middle, an upper variable diameter pipe section, and a lower variable diameter pipe section. The upper variable diameter pipe section is a conical section that gradually increases in size from top to bottom until it is equal to the diameter of the straight pipe section. The lower variable diameter pipe section is a conical section that gradually increases in size from bottom to top until it is equal to the diameter of the straight pipe section. The lower end of the lower variable diameter pipe section is connected to the liquid storage tank 014, and the upper end of the upper variable diameter pipe section is connected to the feed inlet of the carbonization unit.

[0036] The structural design of the pre-reaction tank 01 in this embodiment ensures that the materials have a suitable residence time in the pre-reaction tank 01, which is conducive to the full progress of the reaction.

[0037] In this design, the ratio of the maximum to the minimum diameter of both the upper and lower reducing pipe sections is 8:5; the ratio of the height to the diameter of the straight pipe section is 50:11. Specifically, the preferred height of the straight pipe section is 1 to 2 meters, and the preferred diameter is DN200 to DN250; the preferred diameter for the upper reducing pipe section is DN130-DN160, and for the lower reducing pipe section, it is DN100-DN120.

[0038] The pre-reaction tank 01 is connected to a first connecting pipe 013 at its upper end. The first connecting pipe 013 is connected to the feed inlet of the carbonization unit. A first regulating valve 012 is installed on the first connecting pipe 013.

[0039] In this embodiment, the first regulating valve 012 is used to connect or disconnect the pre-reaction tank 01 and the carbonization unit. When the first regulating valve 012 is opened, the material in the pre-reaction tank 01 can enter the carbonization unit to continue the carbonization reaction. When the first regulating valve 012 is closed, the material in the pre-reaction tank 01 cannot enter the carbonization unit. In specific implementation, the first regulating valve 012 is preferably DN150-DN160.

[0040] The lower end of the pre-reaction tank 01 is connected to the liquid storage tank 014 via a second connecting pipe 015. A second regulating valve 016 and a water pump 017 are installed on the second connecting pipe 015.

[0041] In this embodiment, the second regulating valve 016 is used to connect or disconnect the pre-reaction tank 01 and the liquid storage tank 014. When the second regulating valve 016 is open, liquid from the liquid storage tank 014 can enter the pre-reaction tank 01; when the second regulating valve 016 is closed, liquid from the liquid storage tank 014 cannot enter the pre-reaction tank 01. Specifically, the second regulating valve 016 is preferably DN100-DN110. The water pump 017 is used to pump liquid from the liquid storage tank 014 to the pre-reaction tank 01. The water pump 017 is driven by a motor 018, preferably with a power of 15kW.

[0042] In practice, the liquid flow rate is 90m³. 3 / h- 120m 3 / h, carbon dioxide flow rate is 200m³ / h 3 / h - 230m 3 / h.

[0043] The carbonization unit includes several carbonization towers 02 arranged in sequence. The upper end of the pre-reaction tank 01 is connected to the feed inlet of each carbonization tower 02. The feed inlet of each carbonization tower 02 is also connected to the discharge pipe 03. The gas outlet of each carbonization tower 02 except the last one is connected to the feed inlet of the carbonization tower 02 behind it. The gas outlet of the last carbonization tower 02 is connected to a gas collection pipe 06.

[0044] This embodiment achieves full utilization of carbon dioxide gas. Specifically, except for the last stage, the carbon dioxide gas exiting the gas outlet of each carbonization tower 02 enters the subsequent carbonization tower 02 through its feed inlet. Simultaneously, this embodiment also achieves the collection of hydrogen sulfide gas through the gas collection pipe 06.

[0045] Specifically, taking the three-stage carbonization tower 02 as an example, the gas outlet of the first-stage carbonization tower 02 is connected to the feed inlet of the second-stage carbonization tower 02. Therefore, the carbon dioxide gas overflowing from the gas outlet of the first-stage carbonization tower 02 can re-enter the second-stage carbonization tower 02, and so on. The gas outlet of the last-stage carbonization tower 02 is connected to the gas collection pipe 06.

[0046] In this system, the gas outlet of each carbonization tower 02 is connected to one end of a tee, and the other end of each tee is connected to a gas collection pipe 06 via a second connecting pipe 05. Each second connecting pipe 05 is equipped with a second valve 07. The third end of each tee is connected to one end of a third connecting pipe 08. The other end of the third connecting pipe 08 corresponding to the last carbonization tower 02 is connected to the feed inlet of the first carbonization tower 02. The other end of the third connecting pipe 08 corresponding to each carbonization tower 02 other than the last one is connected to the feed inlet of the carbonization tower 02 behind it. A third valve 09 is installed on the third connecting pipe 08.

[0047] This embodiment allows the gas in each stage of the carbonization tower 02 to be collected through the gas collection pipe 06. This embodiment also allows the gas discharged from the gas outlet of the last stage carbonization tower 02 to re-enter the first stage carbonization tower 02.

[0048] Regarding the preparation of barium carbonate, in cases with and without a pre-reaction tank 01, the bulk density of barium carbonate increased from 0.6-0.7 g / mL to 0.8-0.85 g / mL after the pre-reaction tank 01 was installed. When packaging the same weight of barium carbonate product in the same bag, the height of the bag was reduced by 10-15 cm after the pre-reaction tank 01 was installed, thus lowering transportation costs. Therefore, the barium carbonate preparation system of this embodiment can obtain barium carbonate products with smaller particle sizes, reducing transportation costs.

[0049] The preparation system of this embodiment can improve the preparation efficiency of barium carbonate and obtain barium carbonate crystals with more uniform particle size; the preparation system of this embodiment has the advantage of relatively ideal chemical reaction effect.

[0050] When preparing barium carbonate using the barium carbonate preparation system of this embodiment, the motor 018 is first started. The motor 018 drives the water pump 017 to pump the liquid in the liquid storage tank 014 into the pre-reaction tank 01. At the same time, carbon dioxide enters the distributor body through the first connecting pipe 011. The vent on the distributor body allows the carbon dioxide to be evenly dispersed in the pre-reaction tank 01 in the form of tiny bubbles. During the rising process, the liquid comes into full contact with the carbon dioxide bubbles, undergoing a chemical reaction and beginning to form crystal nuclei. Due to the special design of the pre-reaction tank 01, the material has sufficient residence time in the pre-reaction tank 01, allowing the reaction to proceed fully. After the pre-reaction is completed, the first regulating valve 012 at the top is opened, and the material is pumped into the carbonation tower 02 for the next reaction. After the preparation system has been running for a period of time, the first regulating valve 012 and the second regulating valve 016 can be closed to clean the pre-reaction tank 01. Due to the reasonable structure of the pre-reaction tank 01, the cleaning process is convenient and quick, and blockage is not likely to occur.

[0051] The preparation system of this utility model has the advantage of high efficiency. Through optimized structural design and precise component configuration, it can quickly and effectively carry out the pre-reaction process for barium carbonate preparation. The carbon dioxide distributor ensures uniform distribution of carbon dioxide, and the variable diameter pipe design makes the material flow more reasonable, greatly improving the reaction efficiency.

[0052] The preparation system of this utility model has the advantage of high stability. The coordinated work of components such as regulating valves, water pumps and motors ensures the stability of the device operation, accurately controls the inflow and outflow of materials, ensures the stable progress of the pre-reaction process, and thus improves the stability of product quality.

[0053] The preparation system of this invention has the advantages of energy saving and environmental protection. During the pre-reaction process, the system can fully utilize carbon dioxide and barium hydroxide for the reaction, reducing resource waste. At the same time, the reasonable structural design also reduces energy consumption, meeting the requirements of energy saving and environmental protection.

[0054] The preparation system of this utility model has the advantage of being easy to clean: it is not prone to clogging, is easy to clean, reduces equipment maintenance costs, and improves production efficiency.

[0055] This utility model embodiment also provides a method for preparing barium carbonate, using any of the above preparation systems, and the preparation method includes the following steps:

[0056] The product obtained by mixing barium sulfide and water in the liquid storage tank is introduced into the pre-reaction tank. Carbon dioxide gas is introduced into the pre-reaction tank through the gas source, so that the carbon dioxide gas comes into contact with the barium hydroxide obtained by mixing barium sulfide and water through the carbon dioxide distributor and undergoes a pre-reaction to obtain crystal nuclei.

[0057] The pre-reacted crystal nuclei are introduced into the carbonization unit so that the crystal nuclei grow into barium carbonate crystals within the carbonization unit.

[0058] For the process of introducing the product obtained by mixing barium sulfide and water in a liquid storage tank into a pre-reaction tank, the liquid flow rate is 90 m³ / h - 120 m³ / h. For the process of introducing carbon dioxide gas into the pre-reaction tank through a gas source, the carbon dioxide flow rate is 200 m³ / h - 230 m³ / h.

[0059] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0060] Furthermore, the terms "a," "two," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0061] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A barium carbonate preparation system, characterized in that, The device includes a pre-reaction tank and a carbonization unit. An inspection port is provided on the side wall of the pre-reaction tank, and a maintenance flange is sealed to the inspection port. An interface pipe is sealed to the inside of the maintenance flange. The lower end of the pre-reaction tank is connected to a liquid storage tank, which holds the product of barium sulfide mixed with water. At least one carbon dioxide distributor is installed inside the pre-reaction tank. One end of the interface pipe inside the pre-reaction tank is connected to the carbon dioxide distributor, and the other end of the interface pipe outside the pre-reaction tank is connected to a gas source for holding carbon dioxide gas. The upper end of the pre-reaction tank is connected to the inlet of the carbonization unit, which is also connected to a discharge pipe equipped with a first valve.

2. The barium carbonate preparation system according to claim 1, characterized in that, The carbon dioxide distributor includes a distributor body with an annular closed cavity. The distributor body has a through hole and is connected to the interface pipe through the through hole, so that gas in the gas source can enter the closed cavity through the interface pipe and the through hole. The distributor body has a plurality of gas outlet holes, through which carbon dioxide gas in the distributor body enters the pre-reaction tank.

3. The barium carbonate preparation system according to claim 2, characterized in that, One end of the interface pipe located outside the pre-reaction tank is connected to one end of the first connecting pipe, and the other end of the first connecting pipe is connected to the gas source.

4. The barium carbonate preparation system according to claim 1, characterized in that, The pre-reaction tank includes a straight pipe section in the middle, an upper variable-diameter pipe section, and a lower variable-diameter pipe section. The upper variable-diameter pipe section is a tapered section that gradually increases in size from top to bottom until it is equal to the diameter of the straight pipe section. The lower variable-diameter pipe section is a tapered section that gradually increases in size from bottom to top until it is equal to the diameter of the straight pipe section. The lower end of the lower variable-diameter pipe section is connected to the liquid storage tank, and the upper end of the upper variable-diameter pipe section is connected to the feed inlet of the carbonization unit.

5. The barium carbonate preparation system according to claim 4, characterized in that, The ratio of the maximum diameter to the minimum diameter of both the upper and lower reducing pipe sections is 8:5; the ratio of the height of the straight pipe section to its diameter is 50:

11.

6. The barium carbonate preparation system according to claim 1, characterized in that, The upper end of the pre-reaction tank is connected to a first connecting pipe, which is connected to the feed inlet of the carbonization unit. A first regulating valve is installed on the first connecting pipe.

7. The barium carbonate preparation system according to claim 1, characterized in that, The lower end of the pre-reaction tank is connected to the liquid storage tank via a second connecting pipe, which is equipped with a second regulating valve and a water pump.

8. The barium carbonate preparation system according to claim 1, characterized in that, The carbonization unit includes several carbonization towers arranged in sequence. The upper end of the pre-reaction tank is connected to the feed inlet of each carbonization tower. The feed inlet of each carbonization tower is also connected to the discharge pipe. The gas outlet of each carbonization tower except the last one is connected to the feed inlet of the carbonization tower behind it. The gas outlet of the last carbonization tower is connected to a gas collection pipe.

9. The barium carbonate preparation system according to claim 8, characterized in that, The gas outlet of each stage of the carbonization tower is connected to one end of a tee, and the other end of each tee is connected to the gas collection pipe through a second connecting pipe. Each second connecting pipe is equipped with a second valve. The third end of each tee is connected to one end of a third connecting pipe. The other end of the third connecting pipe corresponding to the last stage of the carbonization tower is connected to the feed inlet of the first stage of the carbonization tower. The other end of the third connecting pipe corresponding to each carbonization tower other than the last stage is connected to the feed inlet of the carbonization tower behind it. The third connecting pipe is equipped with a third valve.

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