Two-stage explosion-proof device and method for preparation production line of sulfide solid electrolyte

Abstract

The invention discloses a two-stage explosion-proof device and method for a sulfide solid electrolyte preparation production line, and belongs to the field of explosion prevention of sulfide solid electrolyte preparation. The two-stage explosion-proof device for the preparation production line of the sulfide solid electrolyte comprises an explosion-proof box and further comprises a first cover body arranged on the upper side of the explosion-proof box, and a second cover body arranged on the lower side of the explosion-proof box, the first treatment cavity is arranged in the explosion-proof box; the gas inlet pipe is arranged between the first treatment cavity and the anti-explosion ring, and inert gas in the anti-explosion ring enters the first treatment cavity along with hydrogen sulfide through the gas inlet pipe to be in contact with the metal oxide; the water removal tank is arranged on one side of the explosion-proof tank, and the water removal tank is communicated with the first treatment cavity; according to the explosion-proof ring, continuously leaked hydrogen sulfide can be brought into the explosion-proof box for treatment through circulation of inert gas, so that explosion caused by excessive hydrogen sulfide accumulation is effectively prevented, and the safety of the explosion-proof ring is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of explosion-proof for preparing sulfide solid electrolytes, and in particular to a level 2 explosion-proof device and method for a preparation production line of sulfide solid electrolytes. Background Art

[0002] With the rapid development of new energy technologies, lithium-ion batteries have been widely used as efficient energy storage devices in many fields such as electric vehicles and portable electronic devices. Sulfide solid electrolytes have become a strong candidate for the next generation of lithium-ion battery electrolytes due to their advantages such as high ionic conductivity, good mechanical stability and compatibility with electrode materials, and have attracted much attention from scientific research and industry.

[0003] In the preparation process of sulfide solid electrolytes, the preparation process often involves high temperature, high pressure and the use of some flammable and explosive raw materials and reaction intermediates. For example, raw materials such as sulfur and metal sulfides are used in the preparation process. Hydrogen sulfide may be produced in the preparation process. Under certain conditions, hydrogen sulfide can easily react violently with oxygen in the air, thereby causing an explosion accident. Therefore, explosion-proof devices are required for explosion prevention.

[0004] The current explosion-proof devices all use separate explosion-proof devices to seal and explosion-proof pipes that may leak. However, in the production of sulfide solid electrolytes, there are multiple points that need to be explosion-proofed. The single first-level explosion-proof is limited, and it is impossible to centrally handle multiple first-level explosion-proof points. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a level 2 explosion-proof device and method for a production line for a sulfide solid electrolyte that can overcome the above problems or at least partially solve the above problems.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A level 2 explosion-proof device for a production line for preparing sulfide solid electrolytes comprises: an explosion-proof box, and also comprises: a first cover body, arranged on the upper side of the explosion-proof box; a first processing chamber, arranged in the explosion-proof box; an air inlet pipe, arranged between the first processing chamber and an explosion-proof ring, wherein the inert gas in the explosion-proof ring enters the first processing chamber along with hydrogen sulfide through the air inlet pipe to contact the metal oxide; a dewatering tank, arranged on one side of the explosion-proof box, and the dewatering tank is connected to the first processing chamber; and a circulating conveying component, used for conveying the gas in the dewatering tank to the explosion-proof ring.

[0008] In order to facilitate the dehydration of the inert gas, further, a second cover is provided on the upper side of the dehydration box, a water-absorbing sponge is fixedly connected inside the dehydration box, and a support frame is provided on the lower side of the water-absorbing sponge.

[0009] In order to facilitate the circulation and transportation of inert gas, the circulation and transportation component further includes a circulation air pump fixedly connected to the dewatering tank, an exhaust pipe is fixedly connected between the circulation air pump and the dewatering tank, the exhaust end of the circulation air pump is connected to the circulation pipe, and a water baffle matching the exhaust pipe is fixedly connected to the lower side of the dewatering tank.

[0010] Preferably, an exhaust end of the circulating air pump is fixedly connected to an exhaust pipe, a fixed pipe is fixedly connected to the exhaust pipe, and the fixed pipe is communicated with the circulating pipe.

[0011] In order to facilitate multi-stage purification of hydrogen sulfide in the inert gas, further, a plurality of second processing chambers are arranged in the explosion-proof box, and connecting pipes are arranged between the first processing chamber and the adjacent second processing chamber and between two adjacent second processing chambers.

[0012] In order to facilitate the metal oxide solution in the dewatering tank to flow back into the explosion-proof box, a connecting hole is further provided between the dewatering tank and the adjacent second processing chamber, and a connecting pipe is fixedly connected between the upper side of the dewatering tank and the adjacent second processing chamber.

[0013] In order to facilitate the reflux of the metal oxide solution, further, a reflux hole is provided between the first processing chamber and the adjacent second processing chamber and between two adjacent second processing chambers.

[0014] In order to increase the contact effect between hydrogen sulfide and the metal oxide solution, further, a water pump is fixedly connected to one side of the explosion-proof box, a liquid extraction pipe is fixedly connected between the water extraction end of the water pump and the first processing chamber, a liquid spray pipe is provided on the first processing chamber and the second processing chamber, an atomizing nozzle is fixedly connected to the end of the liquid spray pipe, and one end of the liquid spray pipe is connected to the liquid outlet end of the water pump, an inclined plate is fixedly connected in the first processing chamber, a purification area is provided on the side of the inclined plate close to the air inlet pipe, and a liquid extraction area is provided on the side of the inclined plate close to the liquid extraction pipe.

[0015] Preferably, a plurality of meshes are disposed in the first processing chamber and the second processing chamber.

[0016] The sulfide solid electrolyte preparation production line uses a 2-level explosion-proof method, which mainly includes the following steps:

[0017] Step 1: Hydrogen sulfide leaking from the pipeline is detected through an explosion-proof ring, the inert gas in the explosion-proof ring is sprayed out to dilute the hydrogen sulfide, and then the inert gas containing hydrogen sulfide is transported to the first processing chamber through the air inlet pipe;

[0018] Step 2: reducing the concentration of hydrogen sulfide by reacting the metal oxide solution in the first processing chamber with hydrogen sulfide;

[0019] Step 3: Then remove the moisture in the gas through the water removal tank;

[0020] Step 4: The gas is transported again to the explosion-proof ring for circulation through the circulation transport component, thereby completing the dilution of hydrogen sulfide and finally removing it.

[0021] Compared with the prior art, the present invention provides a two-level explosion-proof device for a production line of sulfide solid electrolyte, which has the following beneficial effects:

[0022] 1. The preparation production line of the sulfide solid electrolyte uses a two-level explosion-proof device, which uses multiple explosion-proof rings as the first-level explosion-proof. When hydrogen sulfide leaks in one of the explosion-proof rings, it is detected by the detector in the explosion-proof ring, and then the inert gas storage mechanism in the explosion-proof ring is controlled by a microcomputer to discharge the inert gas. The inert gas dilutes the hydrogen sulfide in the explosion-proof ring, and the hydrogen sulfide enters the first processing chamber through the air inlet pipe along with the inert gas. The metal oxide solution in the first processing chamber reacts with the hydrogen sulfide, thereby removing the hydrogen sulfide in the inert gas. The purified inert gas is filtered through the absorbent sponge in the dewatering tank, and finally the purified gas is transported to the circulation pipe through the circulation conveying component, and then the inert gas is transported to the explosion-proof ring again through the circulation pipe. At this time, the circulation of the inert gas can bring the continuously leaked hydrogen sulfide into the explosion-proof box for treatment, thereby effectively preventing the explosion caused by excessive accumulation of hydrogen sulfide, thereby effectively improving the safety of the explosion-proof ring.

[0023] 2. The preparation production line of the sulfide solid electrolyte uses a level 2 explosion-proof device. By setting up multiple second processing chambers, the hydrogen sulfide in the inert gas can be contacted with the metal oxide solution multiple times, thereby effectively improving the efficiency and removal effect of hydrogen sulfide, and thus effectively reducing the safety hazards of hydrogen sulfide leakage.

[0024] 3. The preparation production line of the sulfide solid electrolyte uses a level 2 explosion-proof device. The metal oxide solution in the first treatment chamber is transported to the atomizing nozzle for spraying through a water pump, thereby effectively improving the contact efficiency between hydrogen sulfide and the metal oxide solution, and then effectively improving the efficiency of hydrogen sulfide removal. By setting up multiple meshes, it is convenient to absorb the metal oxide solution and at the same time, it is more convenient for hydrogen sulfide to contact with the mesh.

[0025] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The present invention can bring the continuously leaked hydrogen sulfide into the explosion-proof box for treatment through the circulation of inert gas, thereby effectively preventing the explosion caused by excessive accumulation of hydrogen sulfide, thereby effectively improving the safety of the explosion-proof ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1This is a schematic diagram of the structure of a two-level explosion-proof device for a production line of a sulfide solid electrolyte proposed in the present invention;

[0027] Figure 2 Schematic diagram of the structure of the explosion-proof box in the second-level explosion-proof device for the production line of the sulfide solid electrolyte proposed by the present invention Figure 1 ;

[0028] Figure 3 Schematic diagram of the structure of the explosion-proof box in the second-level explosion-proof device for the production line of the sulfide solid electrolyte proposed by the present invention Figure 2 ;

[0029] Figure 4 It is a cross-sectional schematic diagram of the first processing chamber in the second-level explosion-proof device for the production line of the sulfide solid electrolyte proposed by the present invention;

[0030] Figure 5 It is a cross-sectional schematic diagram of an explosion-proof box in a second-level explosion-proof device for a production line of a sulfide solid electrolyte proposed in the present invention;

[0031] Figure 6 The second-level explosion-proof device for the production line of the sulfide solid electrolyte proposed by the present invention Figure 5 A magnified schematic diagram of center A.

[0032] In the figure: 1. explosion-proof box; 101. first processing chamber; 102. air inlet pipe; 103. inclined plate; 104. mesh; 105. first cover; 106. water pump; 107. liquid extraction pipe; 108. liquid spray pipe; 109. atomizing nozzle; 110. purification area; 111. liquid extraction area; 112. reflux hole; 2. second processing chamber; 201. connecting pipe; 3. water removal tank; 301. connecting hole; 302. water retaining plate; 303. water-absorbing sponge; 304. support frame; 305. connecting pipe; 306. second cover; 4. circulating air pump; 401. air extraction pipe; 402. exhaust pipe; 403. fixed pipe; 404. circulating pipe; 5. explosion-proof ring. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Example 1: Reference Figure 1-Figure 6A level 2 explosion-proof device for a production line of sulfide solid electrolyte preparation includes: an explosion-proof box 1, and also includes: a first cover 105, which is arranged on the upper side of the explosion-proof box 1; a first processing chamber 101, which is arranged in the explosion-proof box 1; an air inlet pipe 102, which is arranged between the first processing chamber 101 and the explosion-proof ring 5, and the inert gas in the explosion-proof ring 5 enters the first processing chamber 101 through the air inlet pipe 102 along with hydrogen sulfide to contact the metal oxide; a dewatering tank 3, which is arranged on one side of the explosion-proof box 1, and the dewatering tank 3 is connected to the first processing chamber 101; a circulating conveying component, which is used to convey the gas in the dewatering tank 3 to the explosion-proof ring 5.

[0035] A second cover 306 is provided on the upper side of the dewatering box 3 , a water-absorbing sponge 303 is fixedly connected inside the dewatering box 3 , and a support frame 304 is provided on the lower side of the water-absorbing sponge 303 .

[0036] The explosion-proof ring 5 is placed at the pipe connection, and is used to detect hydrogen sulfide leakage at the pipe connection, and to transport the leaked hydrogen sulfide gas into the explosion-proof box 1 .

[0037] When sulfide solid electrolyte is produced, multiple explosion-proof rings 5 ​​are used as the primary explosion-proof system. When hydrogen sulfide leaks in one of the explosion-proof rings 5, it is detected by the detector in the explosion-proof ring 5, and then the inert gas storage mechanism in the explosion-proof ring 5 is controlled by a microcomputer to discharge the inert gas. The inert gas dilutes the hydrogen sulfide in the explosion-proof ring 5, and the hydrogen sulfide enters the first processing chamber 101 through the air inlet pipe 102 along with the inert gas. The metal oxide solution in the first processing chamber 101 reacts with the hydrogen sulfide, thereby removing the hydrogen sulfide in the inert gas. The purified inert gas is filtered by the absorbent sponge 303 in the dewatering tank 3, and finally the purified gas is transported to the circulation pipe 404 through the circulation conveying component, and then the inert gas is transported to the explosion-proof ring 5 again through the circulation pipe 404. At this time, the circulation of the inert gas can bring the continuously leaked hydrogen sulfide into the explosion-proof box 1 for treatment, thereby effectively preventing the hydrogen sulfide from accumulating too much and exploding, thereby effectively improving the safety of the explosion-proof ring 5.

[0038] In a specific implementation, the gas in the explosion-proof ring 5 is uniformly collected and processed, thereby effectively preventing hydrogen sulfide from accumulating excessively and exploding, thereby effectively improving the safety of the explosion-proof ring 5.

[0039] Example 2: Reference Figure 1-Figure 6 The second-level explosion-proof device for the preparation production line of sulfide solid electrolyte is basically the same as Example 1. Furthermore, the circulating conveying component includes a circulating air pump 4 fixedly connected to the dewatering tank 3, and an exhaust pipe 401 is fixedly connected between the circulating air pump 4 and the dewatering tank 3. The exhaust end of the circulating air pump 4 is connected to the circulating pipe 404, and the lower side of the dewatering tank 3 is fixedly connected to a water baffle 302 matching the exhaust pipe 401.

[0040] An exhaust pipe 402 is fixedly connected to the exhaust end of the circulating air pump 4 , a fixed pipe 403 is fixedly connected to the exhaust pipe 402 , and the fixed pipe 403 is communicated with the circulating pipe 404 .

[0041] When the gas is circulated and transported, the state of the detector in the explosion-proof ring 5 is obtained by the microcomputer, so as to determine which pipeline in the explosion-proof ring 5 has a hydrogen sulfide leak. Then, the microcomputer controls the solenoid valve in the corresponding circulation pipe 404 to open, and then the dehumidified gas is transported to the explosion-proof ring 5 through the circulation air pump 4, thereby effectively preventing the gas from accumulating in other circulation pipes 404 due to the action of pressure.

[0042] Example 3: Reference Figure 1-Figure 6 The second-level explosion-proof device for the preparation production line of sulfide solid electrolyte is basically the same as that in Example 1. Furthermore, a plurality of second processing chambers 2 are arranged in the explosion-proof box 1, and connecting pipes 201 are arranged between the first processing chamber 101 and the adjacent second processing chamber 2 and between two adjacent second processing chambers 2.

[0043] A communicating hole 301 is provided between the dewatering box 3 and the adjacent second processing chamber 2 , and a connecting pipe 305 is fixedly connected between the upper side of the dewatering box 3 and the adjacent second processing chamber 2 .

[0044] A reflux hole 112 is provided between the first processing chamber 101 and the adjacent second processing chamber 2 and between two adjacent second processing chambers 2 .

[0045] By providing a plurality of second processing chambers 2, the hydrogen sulfide in the inert gas can be brought into contact with the metal oxide solution for multiple times, thereby effectively improving the efficiency and effect of removing the hydrogen sulfide, and further effectively reducing the potential safety hazard of hydrogen sulfide leakage.

[0046] Example 4: Reference Figure 1-Figure 6 , a level 2 explosion-proof device for the preparation production line of sulfide solid electrolyte is basically the same as Example 1, and further, a water pump 106 is fixedly connected to one side of the explosion-proof box 1, and a liquid extraction pipe 107 is fixedly connected between the water extraction end of the water pump 106 and the first processing chamber 101, and a liquid injection pipe 108 is provided on the first processing chamber 101 and the second processing chamber 2, and an atomizing nozzle 109 is fixedly connected to the end of the liquid injection pipe 108, and one end of the liquid injection pipe 108 is connected to the liquid outlet end of the water pump 106, and an inclined plate 103 is fixedly connected in the first processing chamber 101, and a purification area 110 is provided on the side of the inclined plate 103 close to the air inlet pipe 102, and a liquid extraction area 111 is provided on the side of the inclined plate 103 close to the liquid extraction pipe 107.

[0047] A plurality of meshes 104 are disposed in the first processing chamber 101 and the second processing chamber 2 .

[0048] The metal oxide solution in the first processing chamber 101 is transported to the atomizing nozzle 109 for spraying by the water pump 106, thereby effectively improving the contact efficiency between hydrogen sulfide and the metal oxide solution, and further effectively improving the efficiency of removing hydrogen sulfide.

[0049] The multiple meshes 104 are provided to facilitate the absorption of the metal oxide solution and facilitate the contact between hydrogen sulfide and the meshes 104 .

[0050] Example 5: A second-level explosion-proof method for the production line of sulfide solid electrolyte mainly includes the following steps:

[0051] Step 1: Detect hydrogen sulfide leaking from the pipeline through the explosion-proof ring 5, spray out the inert gas in the explosion-proof ring 5 to dilute the hydrogen sulfide, and then transport the inert gas containing hydrogen sulfide to the first processing chamber 101 through the air inlet pipe 102;

[0052] Step 2: reducing the concentration of hydrogen sulfide by reacting the metal oxide solution in the first processing chamber 101 with hydrogen sulfide;

[0053] Step 3: then remove the moisture in the gas through the water removal tank 3;

[0054] Step 4: The gas is transported again to the explosion-proof ring 5 for circulation through the circulation transport component, thereby completing the dilution of hydrogen sulfide and finally removing it.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Level 2 explosion-proof device for the production line of sulfide solid electrolyte, including: The explosion-proof box (1) is characterized in that it also includes: A first cover (105) is arranged on the upper side of the explosion-proof box (1); A first processing chamber (101) is arranged in the explosion-proof box (1); An air inlet pipe (102) is arranged between the first processing chamber (101) and the explosion-proof ring (5), and the inert gas in the explosion-proof ring (5) enters the first processing chamber (101) along with the hydrogen sulfide through the air inlet pipe (102) to contact the metal oxide; A dewatering box (3) is arranged on one side of the explosion-proof box (1), and the dewatering box (3) is connected to the first processing chamber (101); The circulating conveying component is used to convey the gas in the water removal tank (3) to the explosion-proof ring (5).

2. The second-level explosion-proof device for the production line of sulfide solid electrolyte according to claim 1, characterized in that: A second cover (306) is provided on the upper side of the dewatering box (3), a water-absorbing sponge (303) is fixedly connected inside the dewatering box (3), and a support frame (304) is provided on the lower side of the water-absorbing sponge (303).

3. The second-level explosion-proof device for the production line of sulfide solid electrolyte according to claim 2, characterized in that: The circulating conveying assembly comprises a circulating air pump (4) fixedly connected to a dewatering tank (3); an exhaust pipe (401) is fixedly connected between the circulating air pump (4) and the dewatering tank (3); an exhaust end of the circulating air pump (4) is connected to the circulating pipe (404); and a water baffle (302) matching the exhaust pipe (401) is fixedly connected to the lower side of the dewatering tank (3).

4. The second-level explosion-proof device for the production line of sulfide solid electrolyte according to claim 3, characterized in that: An exhaust pipe (402) is fixedly connected to the exhaust end of the circulating air pump (4), a fixed pipe (403) is fixedly connected to the exhaust pipe (402), and the fixed pipe (403) is in communication with the circulating pipe (404).

5. The second-level explosion-proof device for the production line of sulfide solid electrolyte according to claim 2, characterized in that: A plurality of second processing chambers (2) are arranged in the explosion-proof box (1), and a connecting pipe (201) is arranged between the first processing chamber (101) and an adjacent second processing chamber (2), and between two adjacent second processing chambers (2).

6. The second-level explosion-proof device for the production line of sulfide solid electrolyte according to claim 5, characterized in that: A communicating hole (301) is provided between the dewatering box (3) and the adjacent second processing chamber (2), and a connecting pipe (305) is fixedly connected between the upper side of the dewatering box (3) and the adjacent second processing chamber (2).

7. The second-level explosion-proof device for the production line of sulfide solid electrolyte according to claim 1, characterized in that: A reflux hole (112) is provided between the first processing chamber (101) and an adjacent second processing chamber (2), and between two adjacent second processing chambers (2).

8. The second-level explosion-proof device for the production line of sulfide solid electrolyte according to claim 1, characterized in that: A water pump (106) is fixedly connected to one side of the explosion-proof box (1), a liquid extraction pipe (107) is fixedly connected between the water extraction end of the water pump (106) and the first processing chamber (101), a liquid spray pipe (108) is provided on both the first processing chamber (101) and the second processing chamber (2), an atomizing nozzle (109) is fixedly connected to the end of the liquid spray pipe (108), and one end of the liquid spray pipe (108) is communicated with the liquid outlet end of the water pump (106), an inclined plate (103) is fixedly connected inside the first processing chamber (101), a purification area (110) is provided on the side of the inclined plate (103) close to the air inlet pipe (102), and a liquid extraction area (111) is provided on the side of the inclined plate (103) close to the liquid extraction pipe (107).

9. The second-level explosion-proof device for the production line of sulfide solid electrolyte according to claim 8, characterized in that: A plurality of mesh cloths (104) are arranged in both the first processing chamber (101) and the second processing chamber (2).

10. A second-level explosion-proof method for a production line of a sulfide solid electrolyte, using the second-level explosion-proof device for a production line of a sulfide solid electrolyte according to claim 1, characterized in that: The main steps include: Step 1: hydrogen sulfide leaking from the pipeline is detected through the explosion-proof ring (5), the inert gas in the explosion-proof ring (5) is sprayed out to dilute the hydrogen sulfide, and then the inert gas containing hydrogen sulfide is transported to the first processing chamber (101) through the air inlet pipe (102); Step 2: reducing the concentration of hydrogen sulfide by reacting the metal oxide solution in the first processing chamber (101) with hydrogen sulfide; Step 3: then remove the moisture in the gas through the water removal tank (3); Step 4: The gas is transported again to the explosion-proof ring (5) for circulation through the circulation transport component, thereby completing the dilution of hydrogen sulfide and finally removing it.

Images