Anhydrous magnesium chloride preparation system

Abstract

The invention provides an anhydrous magnesium chloride preparation system. The anhydrous magnesium chloride preparation system comprises a gas-solid reactor and a fusion pyrolyzer, the gas-solid reactor comprises a shell, the shell comprises a gas inlet channel, the gas inlet channel comprises a first gas inlet channel, the fusion pyrolyzer comprises a tail gas recovery pipe, and one end of the tail gas recovery pipe extends into an inner cavity of the fusion pyrolyzer. The other end of the tail gas recovery pipe is connected with the first gas inlet channel, tail gas generated in the melting pyrolysis process is recovered by arranging the tail gas recovery pipe, the use amount of reaction gas introduced from the outside can be reduced, the heating energy consumption and the tail gas treatment cost are reduced, and then the effect of reducing the production cost is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of anhydrous magnesium chloride preparation, and in particular to an anhydrous magnesium chloride preparation system. Background Art

[0002] Anhydrous magnesium chloride has many functions such as regulating moisture, promoting crystallization, and improving product quality. It is widely used in chemical, metallurgical, textile, pharmaceutical and other fields and is an important industrial raw material.

[0003] In the process of preparing anhydrous magnesium chloride, the existing anhydrous magnesium chloride preparation system needs to consume a large amount of hydrogen chloride gas to fully react and dehydrate the material, and prevent the material from contacting with air to generate oxide impurities during the reaction. At the same time, in order to maintain a high-temperature reaction environment, the reactor needs to be continuously heated. In addition, in order to make the tail gas meet the emission standards, the existing anhydrous magnesium chloride preparation system needs to invest a large amount of cost to build a matching tail gas treatment device. Therefore, the existing anhydrous magnesium chloride preparation system has the problems of large hydrogen chloride gas consumption, high heating energy consumption, and high tail gas treatment cost, which leads to the problem of high production cost. Summary of the invention

[0004] The main purpose of the present invention is to provide an anhydrous magnesium chloride preparation system, which can reduce the amount of reaction gas introduced from the outside, reduce heating energy consumption and tail gas treatment costs, and thus achieve the effect of reducing production costs.

[0005] In order to achieve the above-mentioned object, according to one aspect of the present invention, a system for preparing anhydrous magnesium chloride is provided, comprising a gas-solid reactor and a melting pyrolyzer, wherein the gas-solid reactor comprises a shell, the shell comprises an air inlet channel, the air inlet channel comprises a first air inlet channel, the melting pyrolyzer comprises a tail gas recovery pipe, one end of the tail gas recovery pipe extends into the internal cavity of the melting pyrolyzer, and the other end of the tail gas recovery pipe is connected to the first air inlet channel.

[0006] Furthermore, the anhydrous magnesium chloride preparation system further includes a tail gas emission pipe, the shell further includes a gas outlet channel, the gas outlet channel includes a first gas outlet channel, and the tail gas emission pipe is connected to the first gas outlet channel.

[0007] Furthermore, the exhaust gas recovery pipe includes a first branch and a second branch, the first branch is connected to the first air intake channel, and the second branch is connected to the exhaust gas discharge pipe; and / or, an air pump is provided on the exhaust gas recovery pipe.

[0008] Furthermore, the shell also includes a feed port and a discharge port, the feed port is arranged at one end of the shell, and the discharge port is arranged at the other end of the shell, and the melt pyrolyzer also includes a first feed channel, and the first feed channel is connected to the discharge port through a pipeline.

[0009] Furthermore, the anhydrous magnesium chloride preparation system also includes a feed air-isolating valve, which is arranged on a pipeline connecting the first feed channel and the discharge port.

[0010] Furthermore, the shell also includes an air outlet channel, a first air inlet channel is arranged at the lower part of the shell, one end of the first air inlet channel is connected to the shell, and the other end is connected to the exhaust gas recovery pipe, and the air outlet channel is arranged at the upper part of the shell, connecting the inner cavity of the shell with the outside.

[0011] Furthermore, the gas-solid reactor also includes a gas transmission channel and an exhaust channel, the gas outlet channel includes a first gas outlet channel, the gas transmission channel is arranged in the outer shell, the side wall of the gas transmission channel includes a first filter screen, a second gas inlet channel is arranged at the bottom of the gas transmission channel, the second gas inlet channel is connected to the first gas inlet channel, a partition wall is also arranged on the inner side of the outer shell, the partition wall and the side wall of the outer shell are spaced apart to form an exhaust channel, the partition wall includes a second filter screen located on the side of the exhaust channel close to the gas transmission channel, the first gas outlet channel connects the exhaust channel with the outside, the first filter screen and the second filter screen are spaced apart to form a material flow area.

[0012] Furthermore, the gas-solid reactor also includes an air introduction system, the air introduction system includes an air introduction chamber, the air outlet channel also includes a second air outlet channel, the air introduction chamber is arranged above the gas transmission channel and is isolated from the gas transmission channel, the side wall of the air introduction chamber includes a third filter screen, the second air outlet channel is arranged on the air introduction chamber, the second air outlet channel connects the air introduction chamber with the outside, and the gas transmission channel is connected to the air introduction chamber through the material flow area.

[0013] Furthermore, the air induction system also includes a back-blowing air channel, which is arranged on the air induction chamber and connects the air induction chamber with the exhaust gas recovery pipe; and / or, the exhaust channel also includes an air collecting area, which is located at the top of the second filter screen and is arranged between the outer shell and the partition wall, and the first air outlet channel is arranged corresponding to the air collecting area and is connected to the air collecting area.

[0014] Furthermore, the gas-solid reactor also includes a gas transmission channel and an air introduction system, the gas outlet channel includes a second gas outlet channel, the gas transmission channel is arranged in the shell, the side wall of the gas transmission channel includes a first filter screen, and a second gas inlet channel is arranged at the bottom of the gas transmission channel, and the second gas inlet channel is connected to the first gas inlet channel. The gas introduction system includes an air introduction chamber, the air introduction chamber is arranged above the gas transmission channel, the side wall of the air introduction chamber includes a third filter screen, the second gas outlet channel is arranged on the gas introduction chamber, and the second gas outlet channel connects the gas introduction chamber with the outside.

[0015] Furthermore, the air bleed system also includes a back-blowing air channel, which is arranged on the air bleed chamber and connects the air bleed chamber with the outside.

[0016] Furthermore, the gas-solid reactor comprises a material flow zone, a material taking pipe is arranged on the shell, the material taking pipe passes through the shell and extends into the material flow zone, and an opening and closing structure is arranged at one end of the material taking pipe.

[0017] Further, the material taking pipe includes a main pipe and a branch pipe which are interconnected, the main pipe extends into the material flow area, the inner wall of the main pipe close to one end of the material flow area is provided with a thread, the opening and closing structure includes a movable rod arranged in the main pipe, a plug is arranged at one end of the movable rod extending into the material flow area, and the other end extends out of the main pipe, the plug cooperates with the main pipe thread, the branch pipe is arranged on the part of the main pipe extending out of the outer shell, and extends obliquely downward from the main pipe; and / or, a guide portion is provided on the lower side of the connection position of the branch pipe in the main pipe, the top surface of the guide portion is an inclined surface, and the extension direction of the inclined surface is the same as the extension direction of the branch pipe.

[0018] Furthermore, the gas-solid reactor comprises a gas transmission channel, and the gas-solid reactor further comprises a material guide cone, and the material guide cone is arranged on the top of the gas transmission channel.

[0019] Furthermore, the molten pyrolyzer includes a first discharge channel, a heating device, a crucible and a top cover. The first feed channel and the first discharge channel are arranged on the top cover and are connected to the interior of the crucible. The heating device is arranged outside the crucible. The top cover is arranged on the top of the crucible. The discharge port is connected to the first feed channel through a pipeline, thereby connecting the gas-solid reactor and the molten pyrolyzer.

[0020] Furthermore, a tail gas recovery pipe is arranged on the top cover and is connected to the interior of the crucible, and one end of the tail gas recovery pipe inside the crucible extends to the top of the crucible.

[0021] Furthermore, the molten pyrolyzer also includes a discharge pipe, one end of which is disposed in the first discharge channel and extends to the bottom of the crucible.

[0022] Furthermore, the molten pyrolyzer also includes a first sleeve, which is sleeved on the outside of the discharge pipe. The first sleeve includes a first vertical section, a horizontal section, and a bending section connecting the first vertical section and the horizontal section. The first vertical section is a round tube and is passed through the first discharge channel. The bending section and the horizontal section are semicircular tubes with openings facing upward. The discharge pipe is installed in the first sleeve, and one end of the discharge pipe passes through the first vertical section and extends into the crucible. The discharge pipe is supported by the horizontal section.

[0023] Furthermore, the melting pyrolyzer also includes a second sleeve, which is covered on the upper part of the horizontal section and forms a pipeline with the horizontal section for the discharge pipe to pass through, and the second sleeve is clamped with the horizontal section.

[0024] Furthermore, the first vertical section includes a first connecting section and a second connecting section, the first connecting section is fixedly arranged in the first discharge channel, the second connecting section is connected to the bending section, and the first connecting section and the second connecting section are fixedly connected; and / or, a tube pad is sleeved in the first connecting section, and the tube pad is sleeved outside the discharge pipe.

[0025] According to the technical solution of the present invention, the gas-solid reactor is used to provide a space for sufficient contact reaction between the reaction gas and the material for preparing anhydrous magnesium chloride, and the melting pyrolyzer is used to melt and pyrolyze the material that has completed the reaction and dehydration. A large amount of high-temperature tail gas will be generated in the process of melting pyrolysis of the material. One end of the tail gas recovery pipe extends into the internal cavity of the melting pyrolyzer, and the other end is connected to the first air inlet channel, so that the tail gas is recovered from the melting pyrolyzer through the first air inlet channel and enters the gas-solid reactor for repeated use; since the tail gas generated by the melting pyrolysis contains gases such as hydrogen chloride and ammonia, the tail gas can be used as a reaction gas in the gas-solid reactor to participate in the reaction of the material. The reaction and dehydration are carried out, and the amount of reaction gas introduced into the anhydrous magnesium chloride preparation system is reduced. At the same time, since the high-temperature tail gas can maintain a high temperature in the gas-solid reactor after being introduced into the gas-solid reactor, the energy consumption for heating in the anhydrous magnesium chloride preparation system is reduced. In addition, by recycling the tail gas, the amount of tail gas that needs to be treated by the tail gas treatment device is reduced. Therefore, the anhydrous magnesium chloride preparation system recovers the tail gas generated in the melt pyrolysis process by arranging a tail gas recovery pipe, reduces the amount of reaction gas introduced from the outside, reduces the heating energy consumption and the tail gas treatment cost, thereby achieving the effect of reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 The overall structural schematic diagram of the anhydrous magnesium chloride preparation system of the embodiment of the present invention is shown;

[0028] Figure 2 A schematic diagram showing the overall structure of a gas-solid reactor of a system for preparing anhydrous magnesium chloride according to an embodiment of the present invention is shown;

[0029] Figure 3 A side view showing the overall structure of a gas-solid reactor of a system for preparing anhydrous magnesium chloride according to an embodiment of the present invention;

[0030] Figure 4 Shows Figure 3 AA section view;

[0031] Figure 5A schematic diagram showing the overall structure of a gas-solid reactor of a system for preparing anhydrous magnesium chloride according to an embodiment of the present invention is shown;

[0032] Figure 6 Shows Figure 5 BB section view;

[0033] Figure 7 A schematic diagram showing the overall structure of a gas-solid reactor of a system for preparing anhydrous magnesium chloride according to an embodiment of the present invention is shown;

[0034] Figure 8 Shows Figure 7 CC section view;

[0035] Fig. 9 A side view showing the overall structure of a gas-solid reactor of a system for preparing anhydrous magnesium chloride according to an embodiment of the present invention;

[0036] Fig.10 A schematic diagram showing the overall structure of a gas-solid reactor of a system for preparing anhydrous magnesium chloride according to an embodiment of the present invention is shown;

[0037] Fig.11 A side view showing the overall structure of a gas-solid reactor of a system for preparing anhydrous magnesium chloride according to an embodiment of the present invention;

[0038] Fig.12 A schematic diagram showing the overall structure of a gas-solid reactor of a system for preparing anhydrous magnesium chloride according to an embodiment of the present invention is shown;

[0039] Fig.13 A side view showing the overall structure of a gas-solid reactor of a system for preparing anhydrous magnesium chloride according to an embodiment of the present invention;

[0040] Fig.14 The overall structural schematic diagram of the material taking pipe of the gas-solid reactor of the anhydrous magnesium chloride preparation system according to one embodiment of the present invention is shown.

[0041] Fig.15 The overall structural schematic diagram of the molten pyrolyzer of the anhydrous magnesium chloride preparation system according to the embodiment of the present invention is shown;

[0042] Fig.16 A schematic diagram of the top view of the structure of the top cover of the molten pyrolyzer of the anhydrous magnesium chloride preparation system according to an embodiment of the present invention is shown;

[0043] Fig.17 A partial structural schematic diagram of a discharge pipe of a molten pyrolyzer of a system for preparing anhydrous magnesium chloride according to an embodiment of the present invention is shown;

[0044] Fig.18The overall structural schematic diagram of the material tank of the molten pyrolyzer of the anhydrous magnesium chloride preparation system according to the embodiment of the present invention is shown;

[0045] Fig.19 A schematic diagram showing the top view of the material tank of the molten pyrolyzer of the anhydrous magnesium chloride preparation system according to an embodiment of the present invention; and

[0046] Fig. 20 Another overall structural schematic diagram of the material tank of the molten pyrolyzer of the anhydrous magnesium chloride preparation system according to an embodiment of the present invention is shown.

[0047] The above drawings include the following reference numerals:

[0048] 1. Gas-solid reactor; 2. Melting pyrolyzer; 3. Shell; 4. Feed port; 5. Discharge port; 6. First air inlet channel; 7. Second air inlet channel; 8. First air outlet channel; 9. Second air outlet channel; 10. Gas transmission channel; 11. Exhaust channel; 12. Partition wall; 13. First filter screen; 14. Second filter screen; 15. Third filter screen; 16. Air induction chamber; 17. Back-blowing air channel; 18. Material flow area; 19. Thermometer; 20. Sight glass; 21. Feeding pipe; 211. Main pipe; 212. Branch pipe; 24. Movable rod; 25. Plug; 26. Guide cone; 27. Guide part; 28. Gas collection area; 29. ​​First feed channel; 3 0. First discharge channel; 31. Heating device; 32. Crucible; 33. Top cover; 34. Tail gas recovery pipe; 341. First branch; 342. Second branch; 35. Discharge pipe; 36. First sleeve; 361. First vertical section; 3611. First connecting section; 3612. Second connecting section; 362. Horizontal section; 363. Bend section; 364. Second vertical section; 3641. Third connecting section; 3642. Fourth connecting section; 37. Second sleeve; 38. Pipe pad; 39. Material tank; 391. Second feed channel; 392. Second discharge channel; 40. Furnace body; 41. Tail gas discharge pipe; 42. Air pump; 43. Feed air isolation valve. DETAILED DESCRIPTION

[0049] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0050] like Figures 1 to 20 As shown, according to an embodiment of the present invention, the anhydrous magnesium chloride preparation system includes a gas-solid reactor 1 and a melting pyrolyzer 2, wherein the gas-solid reactor 1 includes a shell 3, the shell 3 includes an air inlet channel, the air inlet channel includes a first air inlet channel 6, and the melting pyrolyzer 2 includes a tail gas recovery pipe 34, one end of the tail gas recovery pipe 34 extends into the internal cavity of the melting pyrolyzer 2, and the other end of the tail gas recovery pipe 34 is connected to the first air inlet channel 6.

[0051] In the above technical scheme, the gas-solid reactor 1 is used to provide a space for sufficient contact reaction between the reaction gas and the material for preparing anhydrous magnesium chloride, and the melting pyrolyzer 2 is used to melt and pyrolyze the material that has completed the reaction and dehydration in the gas-solid reactor 1. The material will produce a large amount of high-temperature tail gas during the melting pyrolysis process. One end of the tail gas recovery pipe 34 extends into the internal cavity of the melting pyrolyzer 2, and the other end is connected to the first air inlet channel 6, so that the tail gas is recovered from the melting pyrolyzer 2 through the first air inlet channel 6 and enters the gas-solid reactor 1 for repeated use; since the tail gas generated by the melting pyrolysis contains gases such as hydrogen chloride and ammonia, the tail gas can be used as a reaction in the gas-solid reactor 1. The gas participates in the reaction and dehydration of the material, reducing the amount of reaction gas introduced into the anhydrous magnesium chloride preparation system from the outside. At the same time, since the high-temperature tail gas can maintain a relatively high temperature in the gas-solid reactor 1 after being introduced into the gas-solid reactor 1, the energy consumption for heating in the anhydrous magnesium chloride preparation system is reduced. In addition, by recycling the tail gas, the amount of tail gas that needs to be treated by the tail gas treatment device is reduced. Therefore, the anhydrous magnesium chloride preparation system recovers the tail gas generated during the melt pyrolysis process by setting a tail gas recovery pipe 34, reducing the amount of reaction gas introduced from the outside, reducing the heating energy consumption and the tail gas treatment cost, thereby achieving the effect of reducing production costs.

[0052] In one embodiment, the anhydrous magnesium chloride preparation system further includes a tail gas discharge pipe 41 , the housing 3 further includes a gas outlet channel, the gas outlet channel includes a first gas outlet channel 8 , and the tail gas discharge pipe 41 is in communication with the first gas outlet channel 8 .

[0053] In the above technical scheme, after the high-temperature exhaust gas generated by the melt pyrolysis is recovered and enters the gas-solid reactor 1, it reacts and dehydrates with the material in the gas-solid reactor 1. A large amount of waste gas will be generated in the process of reaction and dehydration. The waste gas is discharged from the gas-solid reactor 1 through the exhaust gas discharge pipe 41 connected to the first gas outlet channel 8, so that the new high-temperature exhaust gas generated by the melt pyrolysis can continue to enter the gas-solid reactor 1 to participate in the reaction, thereby realizing the continuous circulation of the high-temperature exhaust gas in the gas-solid reactor 1, continuously participating in the reaction and dehydration of the material, and then realizing continuous production.

[0054] In one embodiment, the exhaust gas recovery pipe 34 includes a first branch 341 and a second branch 342 , the first branch 341 is in communication with the first air intake passage 6 , and the second branch 342 is in communication with the exhaust gas discharge pipe 41 .

[0055] In the above technical solution, the tail gas recovery pipe 34 includes a first branch 341 and a second branch 342. The first branch 341 is used to pass the high-temperature tail gas generated from the molten pyrolyzer 2 into the gas-solid reactor 1 through the first air inlet channel 6 to achieve the reuse of the high-temperature tail gas. The second branch 342 is used to control the amount of high-temperature tail gas entering the gas-solid reactor 1. When too much high-temperature tail gas is generated in the molten pyrolyzer 2, the gas pressure in the tail gas recovery pipe 34 and the gas-solid reactor 1 will increase. The excessive gas pressure in the gas-solid reactor 1 will hinder the reaction and reduce the material The effect and efficiency of the drying reaction. In addition, the excessive air pressure in the gas-solid reactor 1 will cause the material put into the gas-solid reactor 1 to be blown onto the side wall by the high-temperature exhaust gas, making it difficult to sink under the action of gravity, thereby causing the material to be unable to enter the next process from the discharge port 5. Therefore, a second branch 342 connected to the exhaust gas discharge pipe 41 is provided, which can directly transport the excess high-temperature exhaust gas generated in the molten pyrolyzer 2 to the exhaust gas discharge pipe 41 for treatment and discharge, thereby ensuring that a suitable air pressure environment is maintained in the gas-solid reactor 1, so that the material can achieve normal reaction and drying in the gas-solid reactor 1.

[0056] In one embodiment, an air pump 42 is disposed on the tail gas recovery pipe 34 .

[0057] In the above technical scheme, the air pump 42 is used to introduce the high-temperature exhaust gas into the gas-solid reactor 1, and at the same time plays a role in regulating the gas pressure in the gas-solid reactor 1. When the high-temperature exhaust gas generated in the melting pyrolyzer 2 is too little, the gas pressure in the exhaust gas recovery pipe 34 and the gas-solid reactor 1 will become smaller, resulting in the high-temperature exhaust gas recovered into the gas-solid reactor 1 being unable to blow the material put into the gas-solid reactor 1, causing the material to fall directly to the bottom of the gas-solid reactor 1 under the action of gravity, thereby failing to achieve the reaction and drying of the material and the high-temperature exhaust gas. Therefore, an air pump 42 is provided on the exhaust gas recovery pipe 34, and the gas pressure of the high-temperature exhaust gas in the gas-solid reactor 1 is adjusted by the air pump 42 to ensure that the material can achieve normal reaction and drying with the high-temperature exhaust gas in the gas-solid reactor 1.

[0058] In one embodiment, the shell 3 also includes a feed port 4 and a discharge port 5, the feed port 4 is arranged at one end of the shell 3, and the discharge port 5 is arranged at the other end of the shell 3, and the melt pyrolyzer 2 also includes a first feed channel 29, which is connected to the discharge port 5 through a pipeline.

[0059] In the above technical solution, the material is fed into the gas-solid reactor 1 through the feed port 4 . After the material is fully reacted in the gas-solid reactor 1 , it enters the melt pyrolyzer 2 through the pipeline connecting the discharge port 5 and the first feed channel 29 .

[0060] In one embodiment, the anhydrous magnesium chloride preparation system further includes a feed air isolation valve 43 , and the feed air isolation valve 43 is disposed on a pipeline connecting the first feed channel 29 and the discharge port 5 .

[0061] In the above technical solution, the feed air isolation valve 43 is arranged on the pipeline connecting the first feed channel 29 and the discharge port 5 to control the material to enter the melt pyrolyzer 2 from the gas-solid reactor 1. When the material in the gas-solid reactor 1 is fully reacted and dried and meets the requirements for entering the melt pyrolysis process, the feed air isolation valve 43 is opened to allow the material to enter the melt pyrolyzer 2. In addition, the feed air isolation valve 43 is also used to block the gas to prevent the gas in the gas-solid reactor 1 or the melt pyrolyzer 2 from flowing between the gas-solid reactor 1 and the melt pyrolyzer 2 through the pipeline connecting the first feed channel 29 and the discharge port 5, causing the problem that the material cannot enter the melt pyrolyzer 2 normally through the pipeline from the gas-solid reactor 1.

[0062] In one embodiment, the shell 3 also includes an air outlet channel, and a first air inlet channel 6 is arranged at the lower part of the shell 3. One end of the first air inlet channel 6 is connected to the shell 3, and the other end is connected to the exhaust gas recovery pipe 34. The air outlet channel is arranged at the upper part of the shell 3, connecting the inner cavity of the shell 3 with the outside.

[0063] In the above technical scheme, the high-temperature exhaust gas generated from the molten pyrolyzer 2 passes through the exhaust gas recovery pipe 34, enters the gas-solid reactor 1 from the first air inlet channel 6 arranged at the lower part of the outer shell 3, and then discharges the gas-solid reactor 1 from the air outlet channel arranged at the upper part of the outer shell 3, so that the high-temperature exhaust gas flows from bottom to top in the gas-solid reactor 1, thereby increasing the contact area and contact time between the high-temperature exhaust gas and the material, thereby further improving the drying and reaction effect and efficiency of the material.

[0064] In one embodiment, the gas-solid reactor 1 also includes a gas supply channel 10 and an exhaust channel 11, the gas outlet channel includes a first gas outlet channel 8, the gas supply channel 10 is arranged in the outer shell 3, the side wall of the gas supply channel 10 includes a first filter screen 13, and a second gas inlet channel 7 is arranged at the bottom of the gas supply channel 10, and the second gas inlet channel 7 is connected to the first gas inlet channel 6. A partition wall 12 is also arranged on the inner side of the outer shell 3, and the partition wall 12 and the side wall of the outer shell 3 are spaced apart to form the exhaust channel 11. The partition wall 12 includes a second filter screen 14 located on the side of the exhaust channel 11 close to the gas supply channel 10. The first gas outlet channel 8 connects the exhaust channel 11 with the outside, and the first filter screen 13 and the second filter screen 14 are spaced apart to form a material flow area 18.

[0065] In the above technical scheme, the gas delivery channel 10 can make the pyrolysis exhaust gas gather in the gas delivery channel 10 and then be uniformly ejected in all directions from the side walls of the gas delivery channel 10, so as to avoid the problem that the pyrolysis exhaust gas ejected from a single gas outlet is blocked by the material, resulting in the pyrolysis exhaust gas and the material being unable to fully contact and react, thereby increasing the contact area between the pyrolysis exhaust gas and the material so that the pyrolysis exhaust gas and the material are more fully in contact, and at the same time, the heat distribution of the pyrolysis exhaust gas in the gas-solid reactor 1 is more uniform; the side wall of the gas delivery channel 10 includes a first filter screen 13, by setting the first filter screen 13, the second filter screen 13 is provided to prevent the pyrolysis exhaust gas from being ejected from a single gas outlet. A filter screen 13 isolates the gas transmission channel 10 from the material flow area 18, preventing the material flowing in the material flow area 18 from entering the gas transmission channel 10 to hinder the flow of pyrolysis tail gas, and at the same time preventing the material from entering the gas transmission channel 10 to cause the air inlet channel to be blocked; a second air inlet channel 7 is provided at the bottom of the gas transmission channel 10, and the second air inlet channel 7 is connected to the first air inlet channel 6, and the pyrolysis tail gas enters the gas transmission channel 10 via the first air inlet channel 6 and the second air inlet channel 7; the partition wall 12 on the inner side of the shell 3 is spaced apart from the side wall of the shell 3 to form an exhaust channel 11, and at the same time, the second filter screen 14 can be reliably fixed on the side of the exhaust channel 11 close to the gas transmission channel 10; the exhaust channel 11 can make the pyrolysis tail gas gather in the exhaust channel 11, and then discharge the gas-solid pyrolyzer through the first outlet channel 8; by setting the second filter screen 14, the exhaust channel 11 and the material flow area 18 are isolated from each other, and the contact reaction between the material and the pyrolysis tail gas is concentrated in the material flow area 18 between the first filter screen 13 and the second filter screen 14 through the cooperation of the first filter screen 13 and the second filter screen 14, thereby improving The efficiency of material drying and reaction is improved, and the pyrolysis exhaust gas entering the exhaust channel 11 is filtered at the same time to prevent the material and dust and other particles flowing in the material flow area 18 from entering the exhaust channel 11 with the pyrolysis exhaust gas and causing the first outlet channel 8 to be blocked; the first outlet channel 8 connects the exhaust channel 11 with the outside, so that the pyrolysis exhaust gas is discharged from the gas-solid pyrolyzer through the exhaust channel 11; the material flow area 18 formed between the first filter screen 13 and the second filter screen 14 is mainly for material circulation, so that the material is fully contacted and reacted with the pyrolysis exhaust gas in this area.

[0066] In one embodiment, the gas-solid reactor 1 also includes an air introduction system, the air introduction system includes an air introduction chamber 16, the air outlet channel also includes a second air outlet channel 9, the air introduction chamber 16 is arranged above the gas transmission channel 10 and is isolated from the gas transmission channel 10, the side wall of the air introduction chamber 16 includes a third filter screen 15, the second air outlet channel 9 is arranged on the air introduction chamber 16, the second air outlet channel 9 connects the air introduction chamber 16 with the outside, and the gas transmission channel 10 is connected to the air introduction chamber 16 through the material flow area 18.

[0067] In the above technical scheme, the air inlet chamber 16 is arranged above the gas transmission channel 10 and is isolated from the gas transmission channel 10. After the pyrolysis exhaust gas enters the gas transmission channel 10 through the air inlet channel, it gathers in the gas transmission channel 10, so that the air pressure in the gas transmission channel 10 is greater than the air pressure in the material flow area 18. Under the action of air pressure, the pyrolysis exhaust gas enters the material flow area 18 from the gas transmission channel 10 through the first filter screen 13. Then, since the air inlet chamber 16 is connected to the outside through the second air outlet channel 9, the air inlet chamber 16 maintains the same atmospheric pressure as the outside, so that the air pressure in the material flow area 18 is greater than the air pressure in the air inlet chamber 16. After the pyrolysis exhaust gas flows into the material flow area 18 and fully contacts and reacts with the material, the pyrolysis exhaust gas enters the air inlet chamber 16 through the filtration of the third filter screen 15 under the action of air pressure, and then is discharged from the gas-solid reactor 1 through the second air outlet channel 9 connected to the outside.

[0068] In one embodiment, the bleed air system further includes a back-blowing air channel 17 , which is disposed on the bleed air chamber 16 , and the back-blowing air channel 17 connects the bleed air chamber 16 with the exhaust gas recovery pipe 34 .

[0069] In the above technical solution, the gas-solid reactor 1 is provided with a first gas outlet channel 8 and a second gas outlet channel 9 for discharging the pyrolysis tail gas. Compared with the single-channel exhaust technical solution provided with only the first gas outlet channel 8 or only the second gas outlet channel 9, the above-mentioned dual-channel exhaust technical solution can further improve the discharge efficiency of the pyrolysis tail gas, thereby improving the pyrolysis tail gas ventilation capacity of the gas-solid reactor 1, that is, the old pyrolysis tail gas that has consumed a large amount of chlorine and ammonia and a large amount of heat is discharged from the gas-solid reactor 1 as soon as possible, and new high-temperature new pyrolysis tail gas containing a large amount of chlorine and ammonia is quickly replenished, so as to better maintain the high temperature environment in the gas-solid reactor 1, and at the same time, it can also ensure that the pyrolysis tail gas contains sufficient chlorine. and ammonia, further improving the material treatment effect; the pyrolysis tail gas loses a lot of heat in the process of flow and reaction, so when it reaches the air inlet chamber 16, it will condense due to the decrease in temperature, and form crystals on the third filter 15 to cause blockage, so a back-blowing gas channel 17 is provided on the air inlet chamber 16, so that the back-blowing gas outside the gas-solid reactor 1 is blown into the air inlet chamber 16 through the back-blowing gas channel 17, and the crystals formed on the third filter 15 are sublimated into gas again through the blowing action of the back-blowing gas and high-temperature heating, and are discharged from the gas-solid reactor 1 through the second air outlet channel 9 together with the back-blowing gas and the pyrolysis tail gas, thereby avoiding the problem of condensation and crystallization of the pyrolysis tail gas blocking the third filter 15.

[0070] In one embodiment, the exhaust channel 11 also includes an air collecting area 28 , which is located on the top of the second filter 14 and is arranged between the outer shell 3 and the partition wall 12 . The first air outlet channel 8 is arranged corresponding to the air collecting area 28 and is connected to the air collecting area 28 .

[0071] In the above technical solution, the gas collecting area 28 is located at the top of the second filter screen 14 and is arranged between the outer shell 3 and the partition wall 12, and the first gas outlet channel 8 is arranged corresponding to the gas collecting area 28 and is connected to the gas collecting area 28, so that the pyrolysis exhaust gas entering the exhaust channel 11 is further gathered at the first gas outlet channel 8, thereby improving the exhaust efficiency of the pyrolysis exhaust gas.

[0072] In one embodiment, the gas-solid reactor 1 also includes a gas supply channel 10 and an air introduction system, the gas outlet channel includes a second gas outlet channel 9, the gas supply channel 10 is arranged in the outer shell 3, the side wall of the gas supply channel 10 includes a first filter screen 13, and a second air inlet channel 7 is arranged at the bottom of the gas supply channel 10, and the second air inlet channel 7 is connected to the first air inlet channel 6. The air introduction system includes an air introduction chamber 16, and the air introduction chamber 16 is arranged above the gas supply channel 10. The side wall of the air introduction chamber 16 includes a third filter screen 15, and the second gas outlet channel 9 is arranged on the air introduction chamber 16, and the second gas outlet channel 9 connects the air introduction chamber 16 with the outside.

[0073] In the above technical solution, the gas delivery channel 10 can make the pyrolysis tail gas gather in the gas delivery channel 10, and then be uniformly sprayed in all directions from the side wall of the gas delivery channel 10, thereby increasing the contact area between the pyrolysis tail gas and the material so that the pyrolysis tail gas and the material are more fully in contact, and at the same time, the heat distribution of the pyrolysis tail gas in the gas-solid reactor 1 is more uniform; the side wall of the gas delivery channel 10 includes a first filter screen 13, and the first filter screen 13 is provided to prevent the material flowing in the material flow area 18 from flowing back into the gas delivery channel 10 to cause the air inlet channel to be blocked; A second air inlet channel 7 is provided at the bottom of the air delivery channel 10, and the second air inlet channel 7 is connected to the first air inlet channel 6. The pyrolysis exhaust gas enters the air delivery channel 10 via the first air inlet channel 6 and the second air inlet channel 7; the air inlet chamber 16 is provided above the air delivery channel 10 and is isolated from the air delivery channel 10, so that the pyrolysis exhaust gas enters the material flow area 18 via the air delivery channel 10 and fully contacts and reacts with the material, then enters the air inlet chamber 16 after being filtered by the third filter screen 15, and then is discharged from the gas-solid reactor 1 through the second air outlet channel 9 connected to the outside.

[0074] In one embodiment, the first filter screen 13 or the second filter screen 14 or the third filter screen 15 is a Johnson screen, which has a large opening range, a high opening rate, uniform pores, a long life and a low price, so that the filter screen has a better filtering effect on the material in the gas-solid reactor 1, while reducing production costs.

[0075] In one embodiment, the first filter screen 13 or the second filter screen 14 or the third filter screen 15 is a metal sintered screen, which has good filtering accuracy and high temperature resistance, so that the filter screen can maintain a good and stable filtering effect even in the high temperature environment of the gas-solid reactor 1.

[0076] In one embodiment, the bleed air system further includes a back-blowing air channel 17 , which is disposed on the bleed air chamber 16 , and connects the bleed air chamber 16 with the outside.

[0077] In the above technical scheme, the pyrolysis exhaust gas loses a large amount of heat during the flow and reaction process, so when it reaches the air inlet chamber 16, it will condense due to the decrease in temperature, and form crystals on the third filter 15 to cause blockage. Therefore, a backblowing gas channel 17 is provided on the air inlet chamber 16, so that the backblowing gas outside the gas-solid reactor 1 is blown into the air inlet chamber 16 through the backblowing gas channel 17. Through the blowing action of the backblowing gas and high-temperature heating, the crystals formed on the third filter 15 are sublimated into gas again, and discharged from the gas-solid reactor 1 through the second air outlet channel 9 together with the backblowing gas and the pyrolysis exhaust gas, thereby avoiding the problem of condensation and crystallization of the pyrolysis exhaust gas blocking the third filter 15.

[0078] In one embodiment, the gas-solid reactor 1 includes a material flow zone 18 , and a temperature detector 19 is disposed on the outer shell 3 , and the temperature detector 19 is connected to the material flow zone 18 .

[0079] In the above technical scheme, the material flow zone 18 is mainly used for material circulation, so that the material can fully contact and react with the pyrolysis exhaust gas in this area; the thermometer 19 is mainly used to measure the temperature of the material flow zone 18 in the gas-solid reactor 1 to ensure that the gas-solid reactor 1 always maintains a suitable temperature range to complete the material reaction. In addition, the thermometer 19 can also be used to measure the moisture content of the material to determine whether the moisture content of the material meets the requirements for entering the next process.

[0080] In one embodiment, a viewing mirror 20 is provided on the housing 3 , through which the reaction of materials in the gas-solid reactor 1 can be observed.

[0081] In one embodiment, the temperature detector 19 measures the moisture content of the material using the Karl Fischer method.

[0082] In one embodiment, the gas-solid reactor 1 includes a material flow area 18 , and a material taking pipe 21 is disposed on the shell 3 . The material taking pipe 21 passes through the shell 3 and extends into the material flow area 18 . An opening and closing structure is disposed at one end of the material taking pipe 21 .

[0083] In the above technical solution, the material undergoing drying and reaction in the material flow area 18 can be sampled through the material taking pipe 21. An opening and closing structure is provided at one end of the material taking pipe 21. By controlling the opening and closing of the opening and closing structure, the material can be prevented from leaking out of the gas-solid reactor 1 through the material taking pipe 21 along with the pyrolysis exhaust gas during non-sampling time.

[0084] In one embodiment, the material taking pipe 21 includes a main pipe 211 and a branch pipe 212 which are interconnected. The main pipe 211 extends into the material flow area 18. The inner wall of the main pipe 211 near one end of the material flow area 18 is provided with a thread. The opening and closing structure includes a movable rod 24 arranged in the main pipe 211. A plug 25 is arranged at one end of the movable rod 24 extending into the material flow area 18, and the other end extends out of the main pipe 211. The plug 25 is threadedly matched with the main pipe 211. The branch pipe 212 is arranged on the part of the main pipe 211 extending out of the outer shell 3, and extends obliquely downward from the main pipe 211.

[0085] In the above technical solution, the movable rod 24 is rotated to screw the plug 25 out of the main pipe 211, thereby opening the opening and closing structure, allowing the material to enter the main pipe 211 from the opening at one end of the main pipe 211 close to the material flow area 18, and then be discharged through the branch pipe 212 to obtain a material sample, and then the movable rod 24 is pulled down to make the plug 25 contact the internal thread of the end of the main pipe 211 close to the material flow area 18, and the movable rod 24 is rotated to screw the plug 25 into the main pipe 211 so that the plug 25 is threadedly connected to the main pipe 211, thereby closing the opening and closing structure, thereby completing the material taking process.

[0086] In one embodiment, a guide portion 27 is provided in the main pipe 211 at the lower side of the connection position of the branch pipe 212 . The top surface of the guide portion 27 is an inclined surface, and the extending direction of the inclined surface is the same as the extending direction of the branch pipe 212 .

[0087] In the above technical solution, a guide portion 27 is provided at the lower side of the connection position of the branch pipe 212 in the main pipe 211. The guide portion 27 guides the material entering the main pipe 211 during the material taking process to turn to the branch pipe 212, and is discharged from the material taking pipe 21 by the branch pipe 212, so as to prevent the material from accumulating at the bottom of the main pipe 211 and jamming the movable rod 24.

[0088] In one embodiment, the movable rod 24 is pushed to push the plug 25 out of the main pipe 211, thereby opening the opening and closing structure and obtaining a material sample. The movable rod 24 is pulled to retract the plug 25 into the main pipe 211, thereby sealing the opening of the main pipe 211 at one end close to the material flow area 18, thereby closing the opening and closing structure and completing the material taking process.

[0089] In one embodiment, a handle is provided at one end of the movable rod 24 away from the plug, and the handle can be used to more conveniently operate the movable rod to achieve rotation or push-pull movements.

[0090] In one embodiment, the gas-solid reactor 1 includes a gas transmission channel 10, and the gas-solid reactor 1 also includes a material guide cone 26, which is arranged at the top of the gas transmission channel 10 to guide the material entering the gas-solid reactor 1 from the feed port 4 to prevent the material from accumulating and causing the material flow area 18 to be blocked.

[0091] In one embodiment, the melt pyrolyzer 2 includes a first discharge channel 30, a heating device 31, a crucible 32 and a top cover 33. The first feed channel 29 and the first discharge channel 30 are arranged on the top cover 33 and are connected to the interior of the crucible 32. The heating device 31 is arranged outside the crucible 32. The top cover 33 is arranged on the top of the crucible 32. The discharge port 5 is connected to the first feed channel 29 through a pipeline, thereby connecting the gas-solid reactor 1 and the melt pyrolyzer 2.

[0092] In the above technical solution, the crucible 32 is used to contain materials and cooperates with the top cover 33 covered on the crucible 32 to provide a closed reaction environment for the materials. A plurality of channels are provided on the top cover 33 to connect pipelines or equipment. The materials to be melted and pyrolyzed enter the crucible 32 through the first feed channel 29. The heating device 31 is arranged outside the crucible 32 to heat the crucible 32, thereby increasing the internal temperature of the crucible 32 to cause the materials to undergo a melting and pyrolysis reaction. The materials that have completed the melting and pyrolysis are transported out of the crucible 32 through the first discharge channel 30.

[0093] In one embodiment, the tail gas recovery pipe 34 is disposed on the top cover 33 and communicates with the interior of the crucible 32 . One end of the tail gas recovery pipe 34 inside the crucible 32 extends to the top of the crucible 32 .

[0094] In the above technical scheme, the tail gas recovery pipe 34 arranged on the top cover 33 is used to recover the high-temperature tail gas generated during the melting pyrolysis reaction of the material. By setting the tail gas recovery pipe 34 on the top of the melting pyrolyzer 2, the high-temperature tail gas generated during the melting or pyrolysis reaction is transported to the gas-solid reactor 1, and the gas with recovery value in the high-temperature tail gas is reused, thereby reducing resource waste and reducing production costs.

[0095] In one embodiment, the crucible 32 is a quartz crucible. The quartz crucible has good high temperature resistance and a longer service life than ordinary crucibles. The quartz crucible also has good thermal insulation performance, thereby improving the melting pyrolysis efficiency and reducing energy consumption.

[0096] In one embodiment, the top cover 33 is made of heat-insulating material, so as to reduce the heat dissipated from the top cover 33 during the material melting and pyrolysis process, thereby reducing energy consumption.

[0097] In one embodiment, the heating device 31 is an electric heating device. Compared with the heating method using fuel combustion, electric heating has a faster heating speed, more precise temperature control, and is more environmentally friendly and energy-saving.

[0098] In one embodiment, the molten pyrolyzer 2 further includes a vacuum pumping device, a level meter, a sight glass, and a temperature measuring device. The vacuum pumping device, the level meter, the sight glass, and the temperature measuring device are all arranged on the top cover 33 and connected to the interior of the crucible 32 .

[0099] In the above scheme, the vacuum device is used to remove the air in the crucible 32, so that a pure, oxygen-free reaction environment is formed in the crucible 32, thereby preventing the material from oxidizing and deteriorating during the melting pyrolysis process; the material level meter is arranged on the top cover 33 and extends into the crucible 32, and is used to indicate the height of the material in the crucible 32; the sight glass is used to visually observe the reaction conditions of the material in the melting pyrolyzer 2; the temperature measuring device is arranged on the top cover 33 and extends into the crucible 32, and is used to indicate the temperature of the reaction environment in the crucible 32.

[0100] In one embodiment, the molten pyrolyzer 2 further includes a discharge pipe 35 , one end of which is disposed in the first discharge channel 30 and extends to the bottom of the crucible 32 .

[0101] In the above technical solution, the discharge pipe 35 is used to discharge the molten material from the crucible 32. The discharge pipe 35 extends to the bottom of the crucible 32, so as to discharge the molten material from the crucible 32 as completely as possible and reduce the molten material remaining at the bottom of the crucible 32.

[0102] In one embodiment, the molten pyrolyzer 2 also includes a first sleeve 36, which is sleeved on the outside of the discharge pipe 35. The first sleeve 36 includes a first vertical section 361, a horizontal section 362, and a bent section 363 connecting the first vertical section 361 and the horizontal section 362. The first vertical section 361 is a round tube and is passed through the first discharge channel 30. The bent section 363 and the horizontal section 362 are semicircular tubes with openings facing upward. The discharge pipe 35 is installed in the first sleeve 36, and one end of the discharge pipe 35 passes through the first vertical section 361 and extends into the crucible 32. The discharge pipe 35 is supported by the horizontal section 362.

[0103] In the above technical solution, the first sleeve 36 is sleeved on the outside of the discharge pipe 35 to protect the discharge pipe 35. The first sleeve 36 includes a first vertical section 361, a horizontal section 362, and a bending section 363 connecting the first vertical section 361 and the horizontal section 362. The horizontal section 362 of the first sleeve 36 supports the horizontal section of the discharge pipe 35 and supports the discharge pipe 35. The first vertical section 361 is a round tube, which supports the discharge pipe 35 corresponding to the first vertical section 361. The first vertical section 361 is provided in the first discharge channel 30 to support the horizontal section 362 and the bending section 363 connected to the first vertical section 361, so that the horizontal section 362 and the bending section 363 are fixedly connected to the first discharge channel 30 through the first vertical section 361; the bending section 363 and the horizontal section 362 are semicircular tubes with the opening facing upward, so that the discharge pipe 35 can be placed into the first sleeve 36 from above the first sleeve 36, and thus installed in the first sleeve 36.

[0104] In one embodiment, the discharge pipe 35 is a quartz tube. The quartz discharge pipe 35 has excellent high temperature resistance and corrosion resistance, which can prevent the molten material from being damaged by high temperature and corrosive substances after being transported for a long time.

[0105] In one embodiment, the discharge pipe 35 is gap-fitted with the first vertical section 361 and the bent section 363 of the first sleeve 36. The discharge pipe 35 only contacts the horizontal section 362 of the first sleeve 36, and the horizontal section 362 supports the discharge pipe 35, thereby reducing the contact area between the discharge pipe 35 and the first sleeve 36 as much as possible to avoid collision between the discharge pipe 35 and the first sleeve 36 and damage to the discharge pipe 35. In particular, when the discharge pipe 35 is a quartz tube, a quartz discharge pipe is easier to break than a conventional discharge pipe. Therefore, the discharge pipe 35 is gap-fitted with the first vertical section 361 and the bent section 363 of the first sleeve 36 to reduce the contact between the discharge pipe 35 and the first sleeve 36, thereby reducing the risk of breakage of the discharge pipe 35.

[0106] In one embodiment, the melting pyrolyzer 2 further includes a second sleeve 37 , which is covered on the upper portion of the horizontal section 362 and forms a pipeline with the horizontal section 362 for the discharge pipe 35 to pass through, and the second sleeve 37 is clamped with the horizontal section 362 .

[0107] In the above technical solution, after the discharge pipe 35 is placed into the first sleeve 36 from above the first sleeve 36, a second sleeve 37 is installed on the upper part of the horizontal section 362, and the second sleeve 37 is clamped and fixed to the horizontal section 362 to form a pipeline for the discharge pipe 35 to pass through, thereby preventing external impurities from entering the horizontal section 362 from the upper opening of the horizontal section 362 of the first sleeve 36, causing collision or friction with the discharge pipe 35 and causing damage to the discharge pipe 35, thereby further protecting the horizontal section of the discharge pipe 35.

[0108] In one embodiment, a tube pad 38 is disposed in the horizontal section 362 . The tube pad 38 is disposed at the bottom of the horizontal section 362 , and the discharge pipe 35 is placed on the tube pad 38 .

[0109] In the above technical solution, the tube pad 38 is arranged at the bottom of the horizontal section 362, and the discharge pipe 35 is placed on the tube pad 38. The horizontal section 362 of the first sleeve 36 supports the discharge pipe 35 through the tube pad 38 to support the discharge pipe 35, thereby preventing the discharge pipe 35 from directly contacting the hard surface of the horizontal section 362 after being installed in the first sleeve 36, thereby preventing the discharge pipe 35 from rubbing and colliding with the horizontal section 362 and causing damage to the discharge pipe 35.

[0110] In one embodiment, the first vertical section 361 includes a first connecting section 3611 and a second connecting section 3612 . The first connecting section 3611 is fixedly disposed in the first discharge channel 30 . The second connecting section 3612 is connected to the bending section 363 . The first connecting section 3611 and the second connecting section 3612 are fixedly connected.

[0111] In the above technical solution, the first vertical section 361 includes a first connecting section 3611 and a second connecting section 3612. The first connecting section 3611 is fixedly arranged in the first discharge channel 30, and the second connecting section 3612 is connected to the bending section 363. The first connecting section 3611 and the second connecting section 3612 are fixedly connected to each other, so that the bending section 363 and the horizontal section 362 connected to the bending section 363 are fixedly connected to the first discharge channel 30. In addition, the first vertical section 361 is split into The split design of the first connecting section 3611 and the second connecting section 3612 facilitates the disassembly and maintenance of the various sections of the first sleeve 36. When the bending section 363 or the horizontal section 362 or the second connecting section 3612 is damaged and needs to be replaced, it is only necessary to release the fixed connection between the first connecting section 3611 and the second connecting section 3612 and replace other structures except the first connecting section 3611. There is no need to remove the first connecting section 3611 from the first discharge channel 30, thereby reducing the disassembly and maintenance costs.

[0112] In one embodiment, a tube pad 38 is sleeved inside the first connecting section 3611 , and the tube pad 38 is sleeved outside the discharge pipe 35 .

[0113] In the above technical solution, a tube pad 38 is sleeved inside the first connecting section 3611, and the tube pad 38 is sleeved outside the discharge pipe 35 to fix and protect the discharge pipe 35, thereby preventing the discharge pipe 35 from directly contacting the hard inner wall of the first discharge channel 30 after passing through the first discharge channel 30, thereby preventing the discharge pipe 35 from colliding and rubbing with the inner wall of the first discharge channel 30 and causing damage to the discharge pipe 35.

[0114] In one embodiment, the first sleeve 36 also includes a second vertical section 364, which is a circular tube. The first vertical section 361 is arranged at the first end of the horizontal section 362, and the second vertical section 364 is arranged at the second end of the horizontal section 362. The second vertical section 364 is connected to the horizontal section 362 through a bending section 363.

[0115] In the above technical solution, by setting the second vertical section 364, the feeding direction of the discharge pipe 35 is changed, so that the melted material passes through the first vertical section 361 and the horizontal section 362 and is then transported to the next link by the second vertical section 364; the second vertical section 364 is a circular tube, which is sleeved outside the discharge pipe 35 to protect the vertical part of the discharge pipe 35 in the second vertical section 364.

[0116] In one embodiment, the melting pyrolyzer 2 further includes a material tank 39 , which is a closed tank body. The material tank 39 is connected to the interior of the crucible 32 through a discharge pipe 35 .

[0117] In the above technical solution, the material tank 39 is used to store the molten material after being processed by the melting pyrolyzer 2; the material tank 39 is connected to the interior of the crucible 32 through the discharge pipe 35, so that the material after the molten pyrolysis reaction in the crucible 32 is transported to the material tank 39 through the discharge pipe 35; the material tank 39 is a closed tank body to prevent the molten material stored in the material tank 39 from contacting with the outside air, causing the properties of the molten material to change.

[0118] In one embodiment, the material tank 39 includes a negative pressure device, which creates a negative pressure environment inside the material tank 39 so that the air pressure inside the material tank 39 is lower than the air pressure inside the crucible 32. The molten material in the crucible 32 is sucked into the material tank 39 through the discharge pipe 35 under the action of the air pressure, thereby realizing the transportation of the molten material.

[0119] In one embodiment, the material tank 39 also includes a second feed channel 391 and a second discharge channel 392. The second feed channel 391 and the second discharge channel 392 are arranged at the top of the material tank 39 and connected to the inside of the material tank 39. The end of the discharge pipe 35 away from the crucible 32 is arranged in the second feed channel 391.

[0120] In the above technical solution, the end of the discharge pipe 35 away from the crucible 32 is arranged in the second feed channel 391, and the molten material in the crucible 32 is transported to the material tank 39 by the discharge pipe 35. The second discharge channel 392 is used to transport the molten material in the material tank 39 to the next link.

[0121] In one embodiment, the melting pyrolyzer 2 also includes a material tank 39, the material tank 39 also includes a second feed channel 391, the second vertical section 364 includes a third connecting section 3641 and a fourth connecting section 3642, the third connecting section 3641 is connected to the bending section 363, the fourth connecting section 3642 is fixedly arranged in the second feed channel 391, and the third connecting section 3641 and the fourth connecting section 3642 are fixedly connected.

[0122] In the above technical solution, the second vertical section 364 includes a third connecting section 3641 and a fourth connecting section 3642, the third connecting section 3641 is connected to the bending section 363, and the fourth connecting section 3642 is fixedly arranged in the second feed channel 391, and the bending section 363 and the horizontal section 362 connected to the bending section 363 are fixedly connected to the second feed channel 391 through the fixed connection between the third connecting section 3641 and the fourth connecting section 3642; in addition, the second vertical section 364 is split The split design of the third connecting section 3641 and the fourth connecting section 3642 facilitates the disassembly and maintenance of the various sections of the first sleeve 36. When the bending section 363, the horizontal section 362 or the third connecting section 3641 is damaged and needs to be replaced, it is only necessary to release the fixed connection between the third connecting section 3641 and the fourth connecting section 3642 and replace other structures except the fourth connecting section 3642. There is no need to remove the fourth connecting section 3642 from the second feed channel 391, thereby reducing the disassembly and maintenance costs.

[0123] In one embodiment, a tube pad 38 is sleeved inside the fourth connecting section 3642 , and the tube pad 38 is sleeved outside the discharge pipe 35 .

[0124] In the above technical solution, a tube pad 38 is sleeved inside the fourth connecting section 3642, and the tube pad 38 is sleeved outside the discharge pipe 35 to fix and protect the discharge pipe 35, thereby preventing the discharge pipe 35 from directly contacting the hard inner wall of the second feed channel 391 after passing through the second feed channel 391, thereby preventing the discharge pipe 35 from colliding and rubbing with the inner wall of the second feed channel 391, causing damage to the discharge pipe 35.

[0125] In one embodiment, the melting pyrolyzer 2 further includes a furnace body 40 , on which a recess matching the size of the crucible 32 is disposed, and the crucible 32 is disposed in the recess.

[0126] In the above technical solution, a depression matching the size of the crucible 32 is provided on the furnace body 40, and the crucible 32 is arranged in the depression. Since the bottom of the crucible 32 is arc-shaped, it cannot be placed stably. At the same time, the crucible 32 is relatively fragile and easily damaged. Therefore, the furnace body 40 is arranged to wrap around the crucible 32, so that the furnace body 40 can fix and protect the crucible 32.

[0127] In one embodiment, the heating device 31 is disposed in the furnace body 40 , and the distance between the heating device 31 and the crucible 32 is smaller than the distance between the heating device 31 and the outer side of the furnace body 40 .

[0128] In the above technical solution, the heating device 31 is arranged in the furnace body 40. When the heating device 31 is turned on to heat the crucible 32, the furnace body 40 wrapped around the crucible 32 can conduct the heat generated by the heating device 31 to the surrounding of the crucible 32, and heat the crucible 32 from all directions to make the temperature distribution more uniform.

[0129] In one embodiment, the furnace body 40 is made of thermal insulation material, which can reduce the heat loss of the crucible 32 and improve the heating efficiency of the heating device 31, thereby reducing energy consumption and production costs.

[0130] In one embodiment, the tube pad 38 is a soft tube pad. By using the tube pad 38 made of soft material to support the discharge pipe 35, it can further absorb the force between the first sleeve 36 and the discharge pipe 35 and play a buffering role, thereby better protecting the discharge pipe 35 and avoiding the discharge pipe 35 and the first sleeve 36 from rubbing and colliding with each other, causing damage to the discharge pipe 35.

[0131] The working process of the anhydrous magnesium chloride preparation system of the present invention is as follows: first, a small amount of low-hydrated ammonia carnallites is added into the melting pyrolyzer 2, and then the heating device 31 is turned on to melt-pyrolyze the small amount of low-hydrated ammonia carnallites in the melting pyrolyzer 2, and the high-temperature tail gas generated in the melting pyrolysis process is recovered into the gas-solid reactor 1 through the tail gas recovery pipe 34 arranged at the top of the melting pyrolyzer 2, and the high-temperature tail gas is recovered from the first air inlet channel 6 at the bottom of the melting pyrolyzer 2, and then the low-hydrated ammonia carnallites for preparing anhydrous magnesium chloride are put into the gas-solid reactor 1 from the feed port 4, and the high-temperature tail gas blows the low-hydrated ammonia carnallites put into the gas-solid reactor 1 upward from the bottom of the gas-solid reactor 1, and fully contacts with the low-hydrated ammonia carnallites, and after the water content of the low-hydrated ammonia carnallites material is reduced to the desired value through the reaction of the high-temperature tail gas and the low-hydrated ammonia carnallites, the feed air isolation valve 43 is opened to allow the dry material to enter the melting pyrolyzer 2, and the exhaust gas generated by the reaction in the gas-solid reactor 1 is discharged through the first outlet valve 43 arranged at the upper part of the gas-solid reactor 1. The gas channel 8 discharges the gas-solid reactor 1 and is then transported to the tail gas treatment system through the tail gas discharge pipe 41; the material that completes the reaction in the gas-solid reactor 1 and enters the melting pyrolyzer 2 is heated and melted in the crucible 32 of the melting pyrolyzer 2, and the high-temperature tail gas generated during the melting process continues to be recovered through the tail gas recovery pipe 34 arranged on the top of the melting pyrolyzer 2 and enters the gas-solid reactor 1 to participate in the next round of reaction and drying of low-hydrated ammonia carnallite material in the gas-solid reactor 1; after the material is melted in the melting pyrolyzer 2, molten anhydrous magnesium chloride is obtained, and then the molten anhydrous magnesium chloride is transported to the material tank 39 for storage through the discharge pipe 35 arranged on the melting pyrolyzer 2, so that there is enough space in the melting pyrolyzer 2 to accommodate the next batch of materials that complete the reaction and drying in the gas-solid reactor 1; the various parts in the anhydrous magnesium chloride preparation system cooperate with each other, and the above working process is repeated, so that the anhydrous magnesium chloride preparation system can achieve continuous production, thereby improving the production efficiency of anhydrous magnesium chloride.

[0132] It can be seen from the above description that the above-mentioned embodiments of the present invention achieve the following technical effects: the gas-solid reactor 1 is used to provide a space for sufficient contact reaction between the reaction gas and the material for preparing anhydrous magnesium chloride; the melting pyrolyzer 2 is used to melt and pyrolyze the material that has completed the reaction and dehydration in the gas-solid reactor 1; a large amount of high-temperature tail gas will be generated in the process of melting pyrolysis of the material; one end of the tail gas recovery pipe 34 extends into the internal cavity of the melting pyrolyzer 2, and the other end is connected to the first air inlet channel 6, so that the tail gas is recovered from the melting pyrolyzer 2 through the first air inlet channel 6 and enters the gas-solid reactor 1 for repeated use; since the tail gas generated by the melting pyrolysis contains gases such as hydrogen chloride and ammonia, the tail gas is recycled in the gas-solid reactor 1. The reactor 1 can be used as a reaction gas to participate in the reaction and dehydration of the material, thereby reducing the amount of reaction gas introduced into the anhydrous magnesium chloride preparation system from the outside. At the same time, since the high-temperature tail gas can maintain a relatively high temperature in the gas-solid reactor 1 after being introduced into the gas-solid reactor 1, the energy consumption for heating in the anhydrous magnesium chloride preparation system is reduced. In addition, by recycling the tail gas, the amount of tail gas that needs to be treated by the tail gas treatment device is reduced. Therefore, the anhydrous magnesium chloride preparation system recovers the tail gas generated during the melt pyrolysis process by setting a tail gas recovery pipe 34, thereby reducing the amount of reaction gas introduced from the outside, reducing the heating energy consumption and the tail gas treatment cost, thereby achieving the effect of reducing production costs.

[0133] Obviously, the above described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0134] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0135] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A system for preparing anhydrous magnesium chloride, characterized in that: The invention comprises a gas-solid reactor (1) and a molten pyrolyzer (2), wherein the gas-solid reactor (1) comprises an outer shell (3), the outer shell (3) comprises an air inlet channel, the air inlet channel comprises a first air inlet channel (6), the molten pyrolyzer (2) comprises an exhaust gas recovery pipe (34), one end of the exhaust gas recovery pipe (34) extends into the internal cavity of the molten pyrolyzer (2), and the other end of the exhaust gas recovery pipe (34) is connected to the first air inlet channel (6).

2. The anhydrous magnesium chloride preparation system according to claim 1, characterized in that: The anhydrous magnesium chloride preparation system further comprises a tail gas discharge pipe (41), the housing (3) further comprises a gas outlet channel, the gas outlet channel comprises a first gas outlet channel (8), and the tail gas discharge pipe (41) is in communication with the first gas outlet channel (8).

3. The anhydrous magnesium chloride preparation system according to claim 2, characterized in that: The exhaust gas recovery pipe (34) comprises a first branch (341) and a second branch (342), wherein the first branch (341) is connected to the first air intake channel (6), and the second branch (342) is connected to the exhaust gas discharge pipe (41); and / or an air pump (42) is provided on the exhaust gas recovery pipe (34).

4. The anhydrous magnesium chloride preparation system according to claim 1, characterized in that: The shell (3) further comprises a feed port (4) and a discharge port (5), wherein the feed port (4) is arranged at one end of the shell (3), and the discharge port (5) is arranged at the other end of the shell (3), and the molten pyrolyzer (2) further comprises a first feed channel (29), wherein the first feed channel (29) is connected to the discharge port (5) through a pipeline.

5. The anhydrous magnesium chloride preparation system according to claim 4, characterized in that: The anhydrous magnesium chloride preparation system further comprises a feed air-isolating valve (43), and the feed air-isolating valve (43) is arranged on a pipeline connecting the first feed channel (29) and the discharge port (5).

6. The anhydrous magnesium chloride preparation system according to claim 1, characterized in that: The shell (3) also includes an air outlet channel, the first air inlet channel (6) is arranged at the lower part of the shell (3), one end of the first air inlet channel (6) is connected to the shell (3), and the other end is connected to the exhaust gas recovery pipe (34), and the air outlet channel is arranged at the upper part of the shell (3) to connect the inner cavity of the shell (3) with the outside.

7. The anhydrous magnesium chloride preparation system according to claim 6, characterized in that: The gas-solid reactor (1) further comprises a gas delivery channel (10) and an exhaust channel (11), the exhaust channel comprising a first exhaust channel (8), the gas delivery channel (10) being arranged in the housing (3), the side wall of the gas delivery channel (10) comprising a first filter screen (13), a second gas inlet channel (7) being arranged at the bottom of the gas delivery channel (10), the second gas inlet channel (7) being connected to the first gas inlet channel (6), a partition wall (12) being arranged inside the housing (3), the partition wall (12) being spaced apart from the side wall of the housing (3) to form the exhaust channel (11), the partition wall (12) comprising a second filter screen (14) being located on a side of the exhaust channel (11) close to the gas delivery channel (10), the first exhaust channel (8) being connected to the outside, the first filter screen (13) and the second filter screen (14) being spaced apart to form a material flow area (18).

8. The anhydrous magnesium chloride preparation system according to claim 7, characterized in that: The gas-solid reactor (1) further comprises an air introduction system, wherein the air introduction system comprises an air introduction chamber (16), the air outlet channel further comprises a second air outlet channel (9), the air introduction chamber (16) is arranged above the air delivery channel (10) and is isolated from the air delivery channel (10), the side wall of the air introduction chamber (16) comprises a third filter screen (15), the second air outlet channel (9) is arranged on the air introduction chamber (16), the second air outlet channel (9) connects the air introduction chamber (16) with the outside, and the air delivery channel (10) is connected with the air introduction chamber (16) through the material flow area (18).

9. The anhydrous magnesium chloride preparation system according to claim 8, characterized in that: The air induction system also includes a back-blowing air channel (17), which is arranged on the air induction chamber (16), and the back-blowing air channel (17) connects the air induction chamber (16) and the exhaust gas recovery pipe (34); and / or the exhaust channel (11) also includes an air collecting area (28), which is located on the top of the second filter screen (14) and is arranged between the outer shell (3) and the partition wall (12), and the first air outlet channel (8) is arranged corresponding to the air collecting area (28) and is connected to the air collecting area (28).

10. The anhydrous magnesium chloride preparation system according to claim 6, characterized in that: The gas-solid reactor (1) further comprises a gas delivery channel (10) and an air induction system, wherein the gas outlet channel comprises a second gas outlet channel (9), the gas delivery channel (10) is arranged in the housing (3), the side wall of the gas delivery channel (10) comprises a first filter screen (13), a second gas inlet channel (7) is arranged at the bottom of the gas delivery channel (10), the second gas inlet channel (7) is connected to the first gas inlet channel (6), the gas induction system comprises an air induction chamber (16), the air induction chamber (16) is arranged above the gas delivery channel (10), the side wall of the air induction chamber (16) comprises a third filter screen (15), the second gas outlet channel (9) is arranged on the gas induction chamber (16), and the second gas outlet channel (7) connects the gas induction chamber (16) with the outside.

11. The anhydrous magnesium chloride preparation system according to claim 10, characterized in that: The bleed air system further comprises a back-blowing air channel (17), wherein the back-blowing air channel (17) is arranged on the bleed air chamber (16), and the back-blowing air channel (17) connects the bleed air chamber (16) with the outside.

12. The anhydrous magnesium chloride preparation system according to any one of claims 6 to 11, characterized in that: The gas-solid reactor (1) comprises a material flow area (18), and a material taking pipe (21) is arranged on the outer shell (3). The material taking pipe (21) passes through the outer shell (3) and extends into the material flow area (18), and an opening and closing structure is arranged at one end of the material taking pipe (21).

13. The anhydrous magnesium chloride preparation system according to claim 12, characterized in that: The material taking pipe (21) comprises a main pipe (211) and a branch pipe (212) which are interconnected, the main pipe (211) extending into the material flow area (18), the inner wall of the main pipe (211) close to one end of the material flow area (18) is provided with a thread, the opening and closing structure comprises a movable rod (24) arranged in the main pipe (211), one end of the movable rod (24) extending into the material flow area (18) is provided with a plug (25), and the other end extending out of the main pipe (21) is provided with a plug (25). 1), the plug (25) is threadably matched with the main pipe (211), the branch pipe (212) is arranged on the portion of the main pipe (211) extending outside the housing (3), and extends obliquely downward from the main pipe (211); and / or a guide portion (27) is arranged inside the main pipe (211) at the lower side of the connection position of the branch pipe (212), the top surface of the guide portion (27) is an inclined surface, and the extension direction of the inclined surface is the same as the extension direction of the branch pipe (212).

14. The anhydrous magnesium chloride preparation system according to claim 13, characterized in that: The gas-solid reactor (1) comprises a gas delivery channel (10), and the gas-solid reactor (1) further comprises a material guide cone (26), wherein the material guide cone (26) is arranged at the top of the gas delivery channel (10).

15. The anhydrous magnesium chloride preparation system according to claim 4, characterized in that: The molten pyrolyzer (2) comprises a first discharge channel (30), a heating device (31), a crucible (32) and a top cover (33); the first feed channel (29) and the first discharge channel (30) are arranged on the top cover (33) and are connected to the interior of the crucible (32); the heating device (31) is arranged outside the crucible (32); the top cover (33) is arranged on the top of the crucible (32); the discharge port (5) is connected to the first feed channel (29) through a pipeline, thereby connecting the gas-solid reactor (1) and the molten pyrolyzer (2).

16. The anhydrous magnesium chloride preparation system according to claim 15, characterized in that: The tail gas recovery pipe (34) is arranged on the top cover (33) and is connected to the interior of the crucible (32); one end of the tail gas recovery pipe (34) inside the crucible (32) extends to the top of the crucible (32).

17. The system for preparing anhydrous magnesium chloride according to claim 16, characterized in that: The molten pyrolyzer (2) further comprises a discharge pipe (35), one end of which is disposed in the first discharge channel (30) and extends to the bottom of the crucible (32).

18. The system for preparing anhydrous magnesium chloride according to claim 17, characterized in that: The molten pyrolyzer (2) further comprises a first sleeve (36), the first sleeve (36) being sleeved on the outside of the discharge pipe (35), the first sleeve (36) comprising a first vertical section (361), a horizontal section (362) and a bent section (363) connecting the first vertical section (361) and the horizontal section (362), the first vertical section (361) being a round tube and being passed through the first discharge channel (30), the bent section (363) and the horizontal section (362) being semicircular tubes with their openings facing upwards, the discharge pipe (35) being installed in the first sleeve (36), one end of the discharge pipe (35) passing through the first vertical section (361) and extending into the crucible (32), and the discharge pipe (35) being supported by the horizontal section (362).

19. The anhydrous magnesium chloride preparation system according to claim 18, characterized in that: The molten pyrolyzer (2) further comprises a second sleeve (37), which is covered on the upper part of the horizontal section (362) and forms a pipeline with the horizontal section (362) for the discharge pipe (35) to pass through, and the second sleeve (37) is clamped with the horizontal section (362).

20. The anhydrous magnesium chloride preparation system according to claim 18, characterized in that: The first vertical section (361) includes a first connecting section (3611) and a second connecting section (3612), the first connecting section (3611) is fixedly arranged in the first discharge channel (30), the second connecting section (3612) is connected to the bending section (363), and the first connecting section (3611) and the second connecting section (3612) are fixedly connected; and / or, a tube pad (38) is sleeved in the first connecting section (3611), and the tube pad (38) is sleeved outside the discharge pipe (35).

Images