Anhydrous magnesium chloride preparation device

Abstract

The utility model provides an anhydrous magnesium chloride preparation device. The anhydrous magnesium chloride preparation device comprises: a reaction unit comprising a reaction main body and a heating assembly arranged on the reaction main body, the reaction main body having a reaction chamber; the tail gas treatment unit comprises a main body structure and a spraying assembly, the main body structure is provided with a containing cavity, the containing cavity is communicated with the exhaust end of the reaction cavity, the spraying assembly comprises a first conveying part and a liquid conveying main pipe, the first conveying part is installed on the liquid conveying main pipe, and a spraying head is arranged at the liquid outlet end of the liquid conveying main pipe and located in the containing cavity. The anhydrous magnesium chloride preparation device adopting the technical scheme provided by the utility model can solve the problems that the atmospheric environment is polluted and resources are wasted when a preparation device in the prior art is used for preparing anhydrous magnesium chloride.

Description

Technical Field

[0001] This utility model relates to the field of inorganic chemical technology, and more specifically, to an apparatus for preparing anhydrous magnesium chloride. Background Technology

[0002] Anhydrous magnesium chloride is an indispensable raw material in the chemical industry, widely used in metallurgy, chemical industry, pharmaceutical industry, building materials and other fields. Its traditional preparation method mainly comes from the processing of magnesium chloride hydrate (the main component is magnesium chloride hexahydrate). By gradually removing the water of crystallization, it is first converted into low-hydrated magnesium chloride, and finally anhydrous magnesium chloride is obtained through further dehydration. This process usually needs to be carried out at high temperature to promote the evaporation of the water of crystallization.

[0003] Chinese Patent 201910122250.5 discloses an apparatus and method for producing anhydrous magnesium chloride using ammonium chloride and magnesium carbonate. The apparatus includes a discharge unit, a cylinder, and a gas discharge unit. Ammonium chloride and magnesium carbonate are independently added to the cylinder through the ammonium chloride inlet and magnesium carbonate inlet, respectively. After being added to the cylinder, the ammonium chloride is pushed into a preheating gasification section by a pusher module, where it decomposes into hydrogen chloride gas and ammonia gas. The generated hydrogen chloride gas then contacts the magnesium carbonate fed by the pusher module. In a high-temperature reaction section, the hydrogen chloride gas reacts with the magnesium carbonate to produce magnesium chloride and carbon dioxide, thereby achieving the preparation of anhydrous magnesium chloride. However, this apparatus for preparing anhydrous magnesium chloride has certain environmental problems. The apparatus design does not include a dedicated exhaust gas treatment system. The ammonia gas, unreacted hydrogen chloride, and carbon dioxide generated during the reaction are directly emitted into the atmosphere, causing pollution to the atmospheric environment and wasting resources. Utility Model Content

[0004] The main purpose of this invention is to provide an anhydrous magnesium chloride preparation device, which can solve the problem that the preparation of anhydrous magnesium chloride using existing technology not only pollutes the atmospheric environment but also leads to resource waste.

[0005] To achieve the above objectives, this utility model provides an anhydrous magnesium chloride preparation apparatus, comprising: a reaction unit, including a reaction body and a heating component disposed on the reaction body, the reaction body having a reaction chamber; and a tail gas treatment unit, including a main structure and a spray assembly, the main structure having a receiving cavity, the receiving cavity being connected to the exhaust end of the reaction chamber, and the spray assembly including a first conveying part and a liquid delivery main pipe, the first conveying part being mounted on the liquid delivery main pipe, and a spray head being disposed at the liquid outlet end of the liquid delivery main pipe, the spray head being located inside the receiving cavity.

[0006] Furthermore, the exhaust gas treatment unit also includes at least two liquid delivery branches, which are arranged vertically at intervals. Each liquid delivery branch is connected to the main liquid delivery branch. At least a portion of each liquid delivery branch is located within the receiving cavity, and at least one spray head is provided at the outlet end of each liquid delivery branch. And / or, the exhaust gas treatment unit also includes an inlet pipe, which is connected to the receiving cavity, and the inlet end of the main liquid delivery branch is connected to the receiving cavity.

[0007] Furthermore, the anhydrous magnesium chloride preparation apparatus also includes an exhaust pipeline and an induced draft device. One end of the exhaust pipeline is connected to the reaction chamber, and the other end of the exhaust pipeline is connected to the containment chamber. The induced draft device is installed on the exhaust pipeline.

[0008] Furthermore, the anhydrous magnesium chloride preparation apparatus also includes at least one first heating structure, which is disposed on the exhaust pipeline.

[0009] Furthermore, the exhaust gas treatment unit also includes a monitoring unit, which includes a pressure monitoring unit and a temperature monitoring unit. The pressure monitoring unit is used to monitor the pressure inside the containment cavity, and the temperature monitoring unit is used to monitor the temperature inside the containment cavity.

[0010] Furthermore, the anhydrous magnesium chloride preparation apparatus also includes a feeding unit, which includes a mixing device and at least two hoppers. The discharge end of each hopper is connected to the feed end of the mixing device, and the discharge end of the mixing device is connected to the reaction chamber.

[0011] Furthermore, the feeding unit also includes a first conveying pipeline and a second conveying section. One end of the first conveying pipeline is connected to the discharge end of the mixing device, and the other end of the first conveying pipeline is connected to the reaction chamber. The second conveying section is installed on the first conveying pipeline.

[0012] Furthermore, the heating assembly includes at least two first heating elements, which are spaced apart along the length of the reaction body.

[0013] Furthermore, from the feed end to the discharge end of the reaction chamber, the temperature of at least two first heating sections gradually increases; and / or, from the feed end to the discharge end of the reaction chamber, the heating area of ​​at least two first heating sections gradually increases.

[0014] Furthermore, there are three first heating sections, from the feed end of the reaction chamber to the discharge end of the reaction chamber, and the heating temperature ranges of the three first heating sections are 120℃~200℃, 200℃~300℃, and 300℃~450℃ respectively.

[0015] The present invention employs a reaction unit and a tail gas treatment unit. The reaction unit includes a reaction body and a heating component. The reaction body has a reaction chamber for containing low-hydrated magnesium chloride and ammonium chloride raw materials. The heating component ensures that the raw materials react at a suitable temperature. The tail gas treatment unit has a containment chamber connected to the exhaust end of the reaction chamber. The tail gas generated during the reaction can enter the containment chamber. A first conveying unit is installed on the liquid delivery manifold to deliver the liquid in the manifold to the spray head. The spray head on the liquid delivery manifold can directly spray liquid (such as water or low-concentration alkaline solution) into the containment chamber to absorb ammonia and hydrogen chloride in the tail gas. This design avoids direct emission of tail gas into the atmosphere, preventing environmental pollution, and enables the recovery and reuse of ammonia and hydrogen chloride, effectively solving the problems of environmental pollution and resource waste caused by traditional preparation devices during production. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 A schematic diagram of the overall structure of an anhydrous magnesium chloride preparation apparatus according to an embodiment of the present invention is shown.

[0018] Figure 2 A partial structural schematic diagram of an anhydrous magnesium chloride preparation apparatus according to an embodiment of the present invention is shown.

[0019] Figure 3 A partial structural schematic diagram of an anhydrous magnesium chloride preparation apparatus according to an embodiment of the present invention is shown;

[0020] Figure 4 A partial structural schematic diagram of an anhydrous magnesium chloride preparation apparatus according to an embodiment of the present invention is shown.

[0021] The above figures include the following reference numerals:

[0022] 10. Reaction unit; 11. Reaction body; 20. Tail gas treatment unit; 21. Main structure; 211. Receptacle; 22. Spray assembly; 221. First conveying section; 222. Main infusion pipe; 223. Branch infusion pipe; 224. Spray head; 23. Inlet pipe; 24. Monitoring unit; 25. Filter screen; 26. Drain pipe; 30. Exhaust pipeline; 31. First exhaust branch pipe; 32. Second exhaust branch pipe; 33. Third exhaust branch pipe; 40. Exhaust fan; 50. First heating structure; 60. Feeding unit; 61. Mixing device; 62. Hopper; 63. First conveying pipeline; 64. Second conveying section; 65. Second conveying pipeline; 66. Third conveying pipeline; 70. First heating section; 71. Detection section; 80. Discharge unit; 90. Gas pipeline; 91. Second heating structure. Detailed Implementation

[0023] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] See also Figures 1 to 4 As shown, this utility model provides an anhydrous magnesium chloride preparation device, which includes: a reaction unit 10, including a reaction body 11 and a heating component disposed on the reaction body 11, the reaction body 11 having a reaction chamber; and a tail gas treatment unit 20, including a main structure 21 and a spray assembly 22, the main structure 21 having a receiving cavity 211, the receiving cavity 211 being connected to the exhaust end of the reaction chamber, and the spray assembly 22 including a first conveying part 221 and a liquid delivery main pipe 222, the first conveying part 221 being mounted on the liquid delivery main pipe 222, and a spray head 224 being disposed at the liquid outlet end of the liquid delivery main pipe 222, the spray head 224 being located inside the receiving cavity 211.

[0025] In this embodiment, the reaction body 11 has a reaction chamber for containing low-hydrated magnesium chloride and ammonium chloride raw materials. The heating component ensures that the raw materials react at a suitable temperature. The main structure 21 of the tail gas treatment unit 20 has a receiving cavity 211, which is connected to the exhaust end of the reaction chamber. The tail gas generated during the reaction can enter the receiving cavity 211. The inlet end of the liquid supply pipe 222 can be connected to an external liquid supply device for liquid supply. Alternatively, the inlet end of the liquid supply pipe 222 can also be connected to the receiving cavity 211, which can hold liquid, thus supplying liquid to the liquid supply pipe. The first conveying part 221 is installed on the liquid supply pipe 222 and is used to convey the liquid in the liquid supply pipe 222 to the spray head 224. The spray head 224 installed on the liquid supply pipe 222 can directly spray liquid (such as water or low-concentration alkaline solution) into the receiving cavity 211 to absorb ammonia and hydrogen chloride in the tail gas in the receiving cavity 211. The above setup not only avoids direct emission of exhaust gas into the atmosphere and pollution of the environment, but also enables the recovery and reuse of ammonia and hydrogen chloride, effectively solving the problems of environmental pollution and resource waste caused by traditional preparation devices during the production process.

[0026] It should be noted that the raw materials for preparing anhydrous magnesium chloride in this application are low-hydrated magnesium chloride and ammonium chloride, wherein the low-hydrated magnesium chloride is one or more of MgCl2·2H2O to MgCl2·4H2O. The molar ratio of low-hydrated magnesium chloride to ammonium chloride is 1:0.5 to 1:3.

[0027] Furthermore, the industrial production of anhydrous magnesium chloride primarily uses anhydrous hydrogen chloride as a carrier gas to dehydrate hydrated magnesium chloride. This method is characterized by large-scale and modular production, resulting in high output, but also leading to cumbersome equipment, numerous auxiliary devices, and difficulties in adjustment. Changes in production demands or damage to equipment requiring repair can cause maintenance inconvenience. In contrast, the anhydrous magnesium chloride preparation device of this application offers advantages such as economic efficiency, convenience, and ease of maintenance and operation, providing flexibility for magnesium chloride industrial site selection and plant construction. Moreover, the anhydrous magnesium chloride preparation device of this application enables continuous automated production of anhydrous magnesium chloride and allows for miniaturization, facilitating relocation and assembly. Furthermore, the anhydrous magnesium chloride preparation apparatus of this application is used to prepare anhydrous magnesium chloride. After ammonium chloride and low-hydrated magnesium chloride are added to the reaction chamber of the reaction body 11, the ammonium chloride decomposes into an atmosphere of ammonia and hydrogen chloride in the reaction chamber. At high temperature, the low-hydrated magnesium chloride is dehydrated. Compared with the anhydrous hydrogen chloride atmosphere in the traditional process, while preparing anhydrous magnesium chloride, the requirements for raw materials are lower. Low-hydrated magnesium chloride with a certain range of water of crystallization can be used as raw material. At the same time, the amount of ammonium chloride added is also greatly reduced. Moreover, the apparatus can continuously produce anhydrous magnesium chloride, is simple to operate, and has a low cost for producing anhydrous magnesium chloride, which is conducive to industrial promotion. The content of the anhydrous magnesium chloride prepared can reach 98%.

[0028] Preferably, the molar ratio of low-hydrated magnesium chloride to ammonium chloride is 1:1.2 to 1:3. The reaction time of the raw materials in the reaction chamber ranges from 1.5 h to 4 h.

[0029] Preferably, the reaction time can be 90 min, 100 min, 200 min, 400 min, etc. The liquid contained in the receiving cavity 211 of the main structure 21 is water or a low-concentration alkaline solution.

[0030] See also Figures 1 to 4 As shown, in one embodiment of the present invention, the exhaust gas treatment unit 20 further includes at least two liquid delivery pipes 223, which are arranged at intervals in the vertical direction. Each liquid delivery pipe 223 is connected to the main liquid delivery pipe 222. At least a portion of each liquid delivery pipe 223 is located in the receiving cavity 211, and at least one spray head 224 is provided at the liquid outlet end of each liquid delivery pipe 223.

[0031] In this embodiment, by setting up multi-stage infusion pipes 223 and providing at least one spray head 224 at the outlet end of each infusion pipe 223, the contact area between the sprayed liquid (e.g., water) and the exhaust gas can be increased, allowing harmful components in the exhaust gas (such as ammonia and hydrogen chloride) to dissolve more fully in the sprayed liquid, thereby achieving exhaust gas recovery and ensuring the effectiveness of exhaust gas recovery treatment.

[0032] In one embodiment, the first delivery unit 221 is a pump.

[0033] See also Figures 1 to 4 As shown, in one embodiment of the present invention, the exhaust gas treatment unit 20 further includes an inlet pipe 23, which is connected to the receiving cavity 211, and the inlet end of the inlet manifold 222 is connected to the receiving cavity 211.

[0034] In this embodiment, the liquid inlet pipe 23 is used to add liquid (e.g., water) into the containment cavity 211 before production. The liquid in the containment cavity 211 is transported to the spray head 224 through the first conveying part 221, and then sprayed out through the spray head 224 to contact the exhaust gas entering the containment cavity 211, so that the exhaust gas dissolves in the liquid, thereby realizing the recovery treatment of the exhaust gas (ammonia and hydrogen chloride) entering the containment cavity 211.

[0035] See also Figures 1 to 4 As shown, in one embodiment of the present invention, the anhydrous magnesium chloride preparation apparatus further includes an exhaust pipeline 30 and an exhaust fan 40. One end of the exhaust pipeline 30 is connected to the reaction chamber, and the other end of the exhaust pipeline 30 is connected to the receiving chamber 211. The exhaust fan 40 is installed on the exhaust pipeline 30.

[0036] In this embodiment, the exhaust pipe 30 directly connects the reaction chamber and the receiving chamber 211, ensuring that the exhaust gas generated during the reaction can be promptly and smoothly introduced into the receiving chamber 211 for treatment. The induced draft device 40 is installed on the exhaust pipe 30, which can effectively promote the emission of exhaust gas by increasing the airflow speed, thereby improving the absorption efficiency of exhaust gas (ammonia and hydrogen chloride).

[0037] In one embodiment, the induced draft device 40 is an induced draft fan. The induced draft fan can enhance gas flow to deliver the exhaust gas discharged from the reaction chamber to the containment chamber 211.

[0038] See also Figures 1 to 4 As shown, in one embodiment of the present invention, the anhydrous magnesium chloride preparation apparatus further includes at least one first heating structure 50, which is disposed on the exhaust pipeline 30.

[0039] In this embodiment, the exhaust gas (ammonia, hydrogen chloride) generated during the reaction process is easy to condense. A heating structure is provided on the exhaust pipeline 30 to prevent the exhaust gas from condensing in the exhaust pipeline 30 when it is transferred from the high-temperature reaction chamber to the lower-temperature exhaust gas treatment unit 20, thereby ensuring that all the exhaust gas can be discharged into the receiving cavity 211.

[0040] In one embodiment, the heating temperature of the first heating structure 50 is in the range of 250°C to 300°C to prevent gas crystallization.

[0041] In one embodiment, the first heating structure 50 is an electric heating tape.

[0042] See also Figures 1 to 4 As shown, in one embodiment of the present invention, the exhaust gas treatment unit 20 further includes a monitoring unit 24, which includes a pressure monitoring unit and a temperature monitoring unit. The pressure monitoring unit is used to monitor the pressure inside the receiving cavity 211, and the temperature monitoring unit is used to monitor the temperature of the receiving cavity 211.

[0043] In this embodiment, the pressure monitoring unit can monitor the pressure inside the containment cavity 211 in real time, and the temperature monitoring unit is used to monitor the temperature inside the containment cavity 211. The staff can obtain the pressure and temperature inside the containment cavity 211 through the pressure monitoring unit and the temperature monitoring unit to ensure the normal operation of the exhaust gas treatment unit 20.

[0044] In one embodiment, the pressure monitoring unit may be a pressure sensor, and the temperature monitoring unit may be a temperature sensor.

[0045] See also Figures 1 to 4 As shown, in one embodiment of the present invention, the anhydrous magnesium chloride preparation device further includes a feeding unit 60, which includes a mixing device 61 and at least two hoppers 62. The discharge end of each hopper 62 is connected to the feed end of the mixing device 61, and the discharge end of the mixing device 61 is connected to the reaction chamber.

[0046] In this embodiment, at least one silo 62 is used to hold ammonium chloride and at least one silo 62 is used to hold magnesium chloride with low hydration. Ammonium chloride and magnesium chloride with low hydration enter the mixing device 61 from the discharge end of the silo 62. The feeding speed and ratio of the two materials are precisely controlled by the mixing device 61 to ensure that the raw materials in the mixing device 61 can be mixed according to the preset molar ratio, which helps to improve the controllability of the reaction and the purity of the final product.

[0047] In one embodiment, the mixing device 61 is a twin-shaft mixer. The feeding speed of the twin-shaft mixer is 5 kg / h to 20 kg / h, and the feeding ratio of low-hydrated magnesium chloride and ammonium chloride is controlled at 1:0.5 to 1:3.

[0048] See also Figures 1 to 4 As shown, in one embodiment of the present invention, the feeding unit 60 further includes a first conveying pipeline 63 and a second conveying section 64. One end of the first conveying pipeline 63 is connected to the discharge end of the mixing device 61, and the other end of the first conveying pipeline 63 is connected to the reaction chamber. The second conveying section 64 is installed on the first conveying pipeline 63.

[0049] In this embodiment, the first conveying pipeline 63 ensures that the material conveying process from the mixing device 61 to the reaction chamber can be carried out continuously, avoiding the instability of manual material handling and reducing the risk of material blockage or poor conveying. The second conveying section 64 further enhances the reliability of the conveying, ensuring that the material can enter the reaction chamber smoothly and evenly.

[0050] In one embodiment, the second conveying unit 64 is a screw conveyor.

[0051] See also Figures 1 to 4 As shown, in one embodiment of the present invention, there are two silos 62. The anhydrous magnesium chloride preparation device also includes a second conveying pipeline 65 and a third conveying pipeline 66. The discharge end of the second conveying pipeline 65 is connected to one of the two silos 62, and the discharge end of the third conveying pipeline 66 is connected to the other of the two silos 62.

[0052] See also Figures 1 to 4 As shown, in one embodiment of the present invention, the heating assembly includes at least two first heating parts 70, which are spaced apart along the length of the reaction body 11.

[0053] In this embodiment, a plurality of first heating sections 70 are spaced apart along the length of the reaction body 11. By setting the temperature of the first heating sections 70, a temperature gradient can be formed, so that different regions within the reaction body 11 maintain different temperatures. For example, a lower temperature may be needed to preheat the material in the initial stage, while a higher temperature is needed in the middle stage where the dehydration reaction is active to accelerate the dehydration process. In the final stage, the temperature may need to be maintained to ensure complete dehydration, which helps to optimize the reaction process and improve reaction efficiency and product purity.

[0054] In one embodiment, the first heating element 70 is an electric heating tape.

[0055] In one embodiment of this utility model, the temperature of at least two first heating sections 70 gradually increases from the feed end of the reaction chamber to the discharge end of the reaction chamber.

[0056] In this embodiment, as the material moves from the feed end to the discharge end, the gradually increasing heating temperature ensures a smooth transition from the initial preheating stage to the high-temperature dehydration stage, thereby promoting the reaction and improving reaction efficiency. The material experiences a temperature change from low to high as it moves within the reaction chamber, facilitating gradual dehydration at different temperatures and avoiding problems such as material agglomeration and wall adhesion that could occur with instantaneous dehydration at high temperatures. Simultaneously, the gradually increasing heating strategy allows for more efficient utilization of thermal energy, avoiding energy waste caused by using excessively high temperatures in the initial stage.

[0057] In one embodiment of the present invention, the heating areas of at least two first heating sections 70 gradually increase from the feed end of the reaction chamber to the discharge end of the reaction chamber.

[0058] The above settings can ensure the smooth dehydration of magnesium chloride with low hydration and reduce energy waste, especially in the early stage of the reaction, where an excessively large heating zone may lead to unnecessary heat loss.

[0059] In one embodiment of this utility model, there are three first heating parts 70, from the feed end of the reaction chamber to the discharge end of the reaction chamber, and the heating temperature ranges of the three first heating parts 70 are 120℃~200℃, 200℃~300℃, and 300℃~450℃ respectively.

[0060] In this embodiment, the above-mentioned setup facilitates the gradual heating of the material, promoting the transformation of low-hydrated magnesium chloride from a low-hydrated state to an anhydrous state. At the feed end, a relatively low temperature (120℃~200℃) can preheat the material and accelerate the initial dehydration of the material. As the material moves towards the discharge end, the heating temperature gradually increases, thereby accelerating the dehydration reaction until a higher temperature (300℃~450℃) is reached at the discharge end, ensuring that the material is completely dehydrated and forms anhydrous magnesium chloride.

[0061] In one embodiment of this utility model, there are three first heating parts 70, and the heating temperature ranges of the three first heating parts 70 are 160℃, 280℃ and 330℃ respectively. The heating temperature of the first heating structure 50 is 280℃, the rotation speed of the reaction body 11 is 30 rpm, the reaction time is 2 hours, and the tilt angle of the reaction body 11 is 8°.

[0062] See also Figures 1 to 4 As shown, in one embodiment of the present invention, there are three first heating units 70, and the anhydrous magnesium chloride preparation device also includes three detection units 71. The three detection units 71 are arranged in a one-to-one correspondence with the three first heating units 70. The detection units 71 are used to detect the temperature of the heating area of ​​the first heating unit 70 corresponding to them.

[0063] In one embodiment of this invention, the reaction body 11 is tilted at an angle of 7°, the low-hydrated magnesium chloride is pure magnesium chloride tetrahydrate, and the molar ratio of low-hydrated magnesium chloride to ammonium chloride is 1:2.5.

[0064] In one embodiment of this invention, the reaction body 11 is tilted at an angle of 10°, the low-hydrated magnesium chloride is pure dihydrate magnesium chloride, the molar ratio of low-hydrated magnesium chloride to ammonium chloride is 1:1, and the reaction time is 1.75h.

[0065] In one embodiment of this utility model, there are three first heating parts 70, which are electric heating tapes. Compared with the preparation device of the prior art, the anhydrous magnesium chloride preparation device of this application uses electric heating to decompose ammonium chloride. The hydrogen chloride gas generated by the thermal decomposition promotes the dehydration of low-hydration anhydrous magnesium chloride and inhibits its hydrolysis. Furthermore, the three-stage high-temperature reaction section allows the material to be dehydrated slowly and orderly in stages.

[0066] In one embodiment, the length of the reaction body 11 ranges from 8m to 15m. There are three first heating parts 70, and the lengths of the three first heating parts 70 range from 2m to 5m.

[0067] In one embodiment, the reaction body 11 has a length of 10.5m, and there are three first heating parts 70, with lengths of 2.5m, 3.5m, and 4.5m respectively.

[0068] See also Figures 1 to 4 As shown, in one embodiment of the present invention, the anhydrous magnesium chloride preparation device further includes a discharge unit 80, which includes a storage tank and a gate valve disposed at the bottom of the storage tank. The inner cavity of the storage tank is connected to the discharge end of the reaction chamber.

[0069] In one embodiment of the present invention, the anhydrous magnesium chloride preparation device further includes a control cabinet. The first heating structure 50 and the first heating part 70 are both communicatively connected to the control cabinet. The first heating structure 50 and the first heating part 70 can be controlled separately or work together through the control cabinet.

[0070] In one embodiment of this utility model, the anhydrous magnesium chloride preparation apparatus further includes a base. The reaction body 11 is mounted on the base and can rotate relative to the base. Multiple screws are provided on the outer periphery of the base, and multiple connecting protrusions are also provided on the outer periphery of the base. Each connecting protrusion corresponds to one of the screws, and the screws pass through the corresponding connecting protrusions, with the two being threaded together. Through the above configuration, the tilt angle of the reaction body 11 can be adjusted, with the tilt angle ranging from 0° to 15°. The rotational speed of the reaction body 11 ranges from 15 rpm to 60 rpm. The rotational speed and tilt angle of the reaction body 11 can be adjusted according to actual production needs.

[0071] Preferably, the tilt angle of the reaction body 11 ranges from 2.5° to 10°, and the rotation speed of the reaction body 11 is from 25 rpm to 45 rpm. Tilting the reaction body 11 at a certain angle allows the material to flow more smoothly towards the discharge end. If the tilt angle is too small, the reactants move slowly in the reaction chamber, which is not conducive to increasing production capacity and increases the unit power consumption. If the tilt angle is too large, the reactants move too fast in the reaction chamber, which is not conducive to the removal of crystal water and results in impure anhydrous magnesium chloride.

[0072] See also Figures 1 to 4 As shown in one embodiment of this invention, the anhydrous magnesium chloride preparation device further includes two filter screens 25, which are vertically spaced within the receiving cavity. Each filter screen 25 is equipped with multiple Pall ring packings. The perforated ring walls of the Pall ring packings significantly improve the gas and liquid distribution performance, enhancing gas-liquid distribution and fully utilizing the inner surface of the Pall ring packings to increase gas-liquid distribution and transmission efficiency. Furthermore, the Pall ring packings are made of ceramic, possessing characteristics of acid resistance, heat resistance, high and low temperature resistance, and degradation resistance, which can improve the separation efficiency of the preparation device.

[0073] It should be noted that Pall ring packing is existing technology, and its specific structure will not be described in detail here.

[0074] See also Figures 1 to 4 As shown, in one embodiment of the present invention, the anhydrous magnesium chloride preparation device further includes a drain pipe 26, one end of which is connected to the receiving cavity for discharging the liquid from the receiving cavity.

[0075] See also Figures 1 to 4 As shown, in one embodiment of the present invention, the anhydrous magnesium chloride preparation device further includes a second heating structure 91 and a gas supply line 90. The exhaust line 30 further includes a first exhaust branch pipe 31, a second exhaust branch pipe 32, and a third exhaust branch pipe 33. One end of the first exhaust branch pipe 31 is connected to the gas outlet of the reaction chamber, and the other end of the first exhaust branch pipe 31 can be selectively connected to the gas supply line 90 and the second exhaust branch pipe 32. The other end of the gas supply line 90 is connected to the inner cavity of the mixing device. One end of the second exhaust branch pipe 32 is connected to one end of the third exhaust branch pipe 33, and the other end of the third exhaust branch pipe 33 is connected to the receiving cavity.

[0076] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: A reaction unit and a tail gas treatment unit are provided. The reaction unit includes a reaction body and a heating component. The reaction body has a reaction chamber for containing low-hydrated magnesium chloride and ammonium chloride raw materials. The heating component ensures that the raw materials react at a suitable temperature. The main structure of the tail gas treatment unit has a receiving cavity connected to the exhaust end of the reaction chamber. The tail gas generated during the reaction can enter the receiving cavity. A first conveying unit is installed on the liquid delivery main pipe to deliver the liquid in the liquid delivery main pipe to the spray head. The spray head installed on the liquid delivery main pipe can directly spray liquid (such as water or low-concentration alkaline solution) into the receiving cavity to absorb ammonia and hydrogen chloride in the tail gas within the receiving cavity. Through the above arrangement, it is possible to avoid direct emission of tail gas into the atmosphere and cause environmental pollution, and also to achieve the recovery and reuse of ammonia and hydrogen chloride, effectively solving the problems of environmental pollution and resource waste caused by traditional preparation devices during production.

[0077] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0078] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0079] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An apparatus for preparing anhydrous magnesium chloride, characterized in that, include: The reaction unit (10) includes a reaction body (11) and a heating assembly disposed on the reaction body (11), wherein the reaction body (11) has a reaction chamber; The exhaust gas treatment unit (20) includes a main structure (21) and a spray assembly (22). The main structure (21) has a receiving cavity (211) which is connected to the exhaust end of the reaction chamber. The spray assembly (22) includes a first conveying part (221) and a liquid infusion main pipe (222). The first conveying part (221) is installed on the liquid infusion main pipe (222). A spray head (224) is provided at the liquid outlet end of the liquid infusion main pipe (222). The spray head (224) is located inside the receiving cavity (211).

2. The anhydrous magnesium chloride preparation apparatus according to claim 1, characterized in that, The exhaust gas treatment unit (20) further includes at least two infusion branch pipes (223), which are arranged vertically at intervals. Each infusion branch pipe (223) is connected to the main infusion pipe (222). At least a portion of each infusion branch pipe (223) is located in the receiving cavity (211), and at least one spray head (224) is provided at the liquid outlet end of each infusion branch pipe (223). And / or, the exhaust gas treatment unit (20) further includes an inlet pipe (23), which is connected to the receiving cavity (211), and the liquid inlet end of the main infusion pipe (222) is connected to the receiving cavity (211).

3. The anhydrous magnesium chloride preparation apparatus according to claim 1, characterized in that, The anhydrous magnesium chloride preparation device further includes an exhaust pipeline (30) and an exhaust fan (40). One end of the exhaust pipeline (30) is connected to the reaction chamber, and the other end of the exhaust pipeline (30) is connected to the receiving chamber (211). The exhaust fan (40) is installed on the exhaust pipeline (30).

4. The anhydrous magnesium chloride preparation apparatus according to claim 3, characterized in that, The anhydrous magnesium chloride preparation apparatus further includes at least one first heating structure (50), and at least one first heating structure (50) is disposed on the exhaust pipeline (30).

5. The anhydrous magnesium chloride preparation apparatus according to any one of claims 1 to 4, characterized in that, The exhaust gas treatment unit (20) further includes a monitoring unit (24), which includes a pressure monitoring unit and a temperature monitoring unit. The pressure monitoring unit is used to monitor the pressure inside the containment cavity (211), and the temperature monitoring unit is used to monitor the temperature of the containment cavity (211).

6. The anhydrous magnesium chloride preparation apparatus according to any one of claims 1 to 4, characterized in that, The anhydrous magnesium chloride preparation device further includes a feeding unit (60), which includes a mixing device (61) and at least two hoppers (62). The discharge end of each hopper (62) is connected to the feed end of the mixing device (61), and the discharge end of the mixing device (61) is connected to the reaction chamber.

7. The anhydrous magnesium chloride preparation apparatus according to claim 6, characterized in that, The feeding unit (60) further includes a first conveying pipeline (63) and a second conveying section (64). One end of the first conveying pipeline (63) is connected to the discharge end of the mixing device (61), and the other end of the first conveying pipeline (63) is connected to the reaction chamber. The second conveying section (64) is installed on the first conveying pipeline (63).

8. The apparatus for preparing anhydrous magnesium chloride according to any one of claims 1 to 4, characterized in that, The heating assembly includes at least two first heating parts (70), which are spaced apart along the length of the reaction body (11).

9. The anhydrous magnesium chloride preparation apparatus according to claim 8, characterized in that, From the feed end of the reaction chamber to the discharge end of the reaction chamber, the temperature of at least two of the first heating parts (70) gradually increases; and / or, from the feed end of the reaction chamber to the discharge end of the reaction chamber, the heating area of ​​at least two of the first heating parts (70) gradually increases.

10. The anhydrous magnesium chloride preparation apparatus according to claim 8, characterized in that, There are three first heating parts (70), from the feed end of the reaction chamber to the discharge end of the reaction chamber. The heating temperature ranges of the three first heating parts (70) are 120℃~200℃, 200℃~300℃, and 300℃~450℃ respectively.

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