System for treating sulfide electrolyte waste

Abstract

The utility model relates to the technical field of sulfide waste treatment, and discloses a system for treating sulfide electrolyte waste, which comprises a bracket assembly and a concentration detection assembly, and further comprises a heating treatment assembly, an absorption reaction assembly, a transfer assembly, a solution regeneration assembly and an adding assembly which are sequentially mounted on the bracket assembly, the heating treatment assembly comprises a sulfide waste treatment device which is mounted on the bracket assembly and is used for treating sulfide electrolyte waste, and an output pipeline for discharging hydrogen sulfide gas is arranged on the sulfide waste treatment device; according to the hydrogen sulfide treatment device, sodium hydroxide alkali liquor is adopted for neutralization in the hydrogen sulfide treatment process, the hydrogen sulfide treatment efficiency can be greatly improved, meanwhile, a sodium hydroxide solution can be obtained again through further hydrogen peroxide treatment and neutralization of the solution, a closed loop is formed, elemental sulfur is recycled, the environment can be protected, and the cost can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of sulfide waste treatment, in particular to a system for treating sulfide electrolyte waste. Background Art

[0002] Since the advent of lithium-ion batteries, they have been widely used in portable electronic devices such as cameras, laptops, mobile phones, and power tools due to their high cycle life and high energy density. In recent years, with the update and iteration of lithium-ion batteries, they have even been applied to the field of new energy vehicles. At present, everyone in this field pays special attention to all-solid-state batteries with high safety and high energy density. Among them, inorganic solid-state batteries based on sulfide solid-state batteries are favored by academia and business circles because their electrolytes have high ionic conductivity, easy to form skeleton structures, and good electrochemical stability. Although sulfide solid-state electrolytes have their unique advantages, there are also many problems in the actual research and development process. Here, the environmental safety issues in their synthesis and testing process are particularly mentioned. On the one hand, a lot of waste will be generated during the synthesis and testing process. These wastes are usually collected and removed uniformly after being soaked in a fume hood. This simple and crude method will not only pollute the environment, but also cause the loss of high value-added elements such as lithium, germanium, and tin. On the other hand, since sulfide solid-state electrolytes will produce hydrogen sulfide gas after hydrolysis, it is one of the main pollutants in the atmosphere, which not only harms human health, but also seriously corrodes equipment.

[0003] At present, the industrial treatment methods for hydrogen sulfide are quite mature, but these methods have disadvantages such as large equipment footprint, slow desulfurization speed, and high cost. In addition, in view of the problem of loss of high-value elements such as lithium, germanium, and tin during the synthesis of sulfide solid electrolytes, a system for treating sulfide electrolyte waste is needed, which can not only effectively collect the high-value elements in sulfide electrolytes, but also efficiently remove hydrogen sulfide gas and recover elemental sulfur for electrolyte synthesis. Utility Model Content

[0004] The purpose of the utility model is to provide a system for treating sulfide electrolyte waste, which can effectively collect the high-value elements in the sulfide electrolyte, and can efficiently remove hydrogen sulfide gas and recover elemental sulfur for the synthesis of the electrolyte, in view of the problems that the equipment occupies too large an area, the desulfurization speed is too slow, and the cost is high when treating hydrogen sulfide in the prior art; and there is a loss of high-value elements such as lithium, germanium, and tin during the synthesis of the sulfide solid electrolyte.

[0005] The utility model is realized through the following technical scheme: a system for treating sulfide electrolyte waste, comprising a bracket component and a concentration detection component, the system comprising a heating treatment component, an absorption reaction component, a transfer component, a solution regeneration component, and an addition component which are sequentially installed on the bracket component, the heating treatment component comprising a sulfide waste processor installed on the bracket component for treating sulfide electrolyte waste, the sulfide waste processor being provided with an output pipeline for discharging hydrogen sulfide gas, an exhaust pump for increasing the flow rate of hydrogen sulfide gas being installed on the output pipeline of the sulfide waste processor, and the output pipeline of the sulfide waste processor being connected to the absorption reaction component.

[0006] In order to better realize the utility model, further, the absorption reaction component includes an absorption tower fixedly mounted on the bracket assembly, a first delivery pipe fixedly mounted on the absorption tower, the first delivery pipe is connected to the output pipe of the sulfide waste processor, a one-way air outlet ring is fixedly mounted on the first delivery pipe, a plurality of one-way air outlet rings are provided, and each of the plurality of one-way air outlet rings is provided with an annular one-way air outlet hole for discharging hydrogen sulfide gas, an isolation plate and a ventilation plate are also fixedly mounted on the first delivery pipe, the isolation plate and the ventilation plate constitute an alkali liquid chamber, the ventilation plate is provided with an exhaust hole for discharging waste gas, and a waste gas outlet for discharging waste gas is also fixedly mounted on the first delivery pipe.

[0007] In order to better realize the utility model, further, the transfer assembly includes a first transfer pump and a second transfer pump fixedly mounted on the bracket assembly, the first transfer pump is provided with an input pipe and an output pipe, the input pipe of the first transfer pump is connected to the absorption reaction assembly, the output pipe of the first transfer pump is connected to the solution regeneration assembly, the second transfer pump is provided with an input pipe and an output pipe, the input pipe of the second transfer pump is connected to the solution regeneration assembly, and the output pipe of the second transfer pump is connected to the absorption reaction assembly.

[0008] In order to better realize the utility model, further, the solution regeneration component includes a stirring kettle fixedly mounted on the bracket assembly, a precipitation plate for precipitating sulfur elemental is movably mounted on the stirring kettle, a drain valve for discharging liquid is fixedly mounted on the precipitation plate, a detachable baffle for collecting sulfur elemental is also movably mounted on the stirring kettle, a first motor is also fixedly mounted on the stirring kettle, and a stirring roller for stirring the mixed solution is fixedly mounted on the output shaft of the first motor.

[0009] In order to better realize the utility model, it is further characterized in that: the adding component includes a hydrogen peroxide storage tank fixedly mounted on the bracket assembly, a second delivery pipe is fixedly mounted on the hydrogen peroxide storage tank, the second delivery pipe connects the hydrogen peroxide storage tank and the solution regeneration component, an adding pump for transferring hydrogen peroxide is fixedly mounted on the hydrogen peroxide storage tank, and the adding pump is fixedly mounted on the hydrogen peroxide storage tank.

[0010] In order to better realize the utility model, it is further characterized in that: the concentration detection component includes an operating system fixedly mounted on the bracket component, a first detector and a second detector are fixedly mounted on the operating system, the first detector is fixedly mounted with a first probe for detecting the concentration of alkali solution through connecting wires, the first probe is fixedly mounted with the absorption reaction component, the second detector is fixedly mounted with a second probe for detecting the concentration of alkali solution through connecting wires, and the second probe is fixedly mounted with the solution regeneration component.

[0011] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0012] (1) The utility model can fully extract high value-added elements such as Li, Ge, Sn, etc. from the sulfide waste liquid obtained by laboratory fume hood treatment by treating it with phosphoric acid acid solution, thereby avoiding their loss; at the same time, an absorption reaction component is equipped when treating sulfide waste, which can fully avoid the problems of excessive hydrogen sulfide gas generated by adding acidic solution to pollute the environment and harm the health of personnel.

[0013] (2) The utility model adopts sodium hydroxide alkaline solution to neutralize hydrogen sulfide in the treatment of hydrogen sulfide, which can greatly improve the treatment efficiency of hydrogen sulfide. At the same time, the neutralized solution can be further treated with hydrogen peroxide to obtain sodium hydroxide solution again to form a closed loop and recover sulfur element, which can not only protect the environment but also save costs.

[0014] (3) The utility model is equipped with a concentration detection component, which can perform real-time processing according to the required alkali solution concentration, avoiding the problems of excessive neutralization solution occupying a large area and excessive equipment investment leading to high costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 3 It is a half-section schematic diagram of the absorption reaction component of the utility model.

[0018] Figure 4 It is a half-section schematic diagram of the solution regeneration component of the utility model.

[0019] Wherein: 1- bracket assembly; 2- absorption reaction assembly; 3- solution regeneration assembly; 4- concentration detection assembly; 5- transfer assembly; 6- addition assembly; 7- heating treatment assembly; 101- bottom plate; 102- mounting bracket; 201- absorption tower; 202- first delivery pipe; 203- waste gas outlet; 204- one-way air outlet ring; 205- isolation plate; 206- ventilation plate; 301- stirring kettle; 302- first motor; 303- removable baffle; 304- sedimentation plate; 305- drain valve; 306- stirring roller; 401- operating system; 402- first detector; 403- second detector; 404- first probe; 405- second probe; 501- first transfer pump; 502- second transfer pump; 601- hydrogen peroxide storage tank; 602- addition pump; 603- second delivery pipe; 701- sulfide waste processor; 702- exhaust pump. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1:

[0022] like Figure 1 , Figure 2 , Figure 3 As shown, a system for treating sulfide electrolyte waste includes a support assembly 1 and a concentration detection assembly 4. The system includes a heating treatment assembly 7, an absorption reaction assembly 2, a transfer assembly 5, a solution regeneration assembly 3, and an addition assembly 6 which are sequentially installed on the support assembly 1. The heating treatment assembly 7 includes a sulfide waste processor 701 installed on the support assembly 1 for treating sulfide electrolyte waste. The sulfide waste processor 701 is provided with an output pipeline for discharging hydrogen sulfide gas. An exhaust pump 702 for increasing the flow rate of hydrogen sulfide gas is installed on the output pipeline of the sulfide waste processor 701. The output pipeline of the sulfide waste processor 701 is connected to the absorption reaction assembly 2.

[0023] The bracket assembly 1 includes a base plate 101, on which a mounting bracket 102 is fixedly mounted, and the mounting bracket 102 is used to mount a concentration detection assembly 4. The heating treatment assembly 7 includes a sulfide waste processor 701 fixedly mounted on the base plate 101 for processing sulfide electrolyte waste. The sulfide waste processor 701 is provided with an output pipeline for discharging hydrogen sulfide gas. An exhaust pump 702 for increasing the flow rate of hydrogen sulfide gas is fixedly mounted on the output pipeline of the sulfide waste processor 701. The exhaust pump 702 is fixedly mounted on the base plate 101, and the output pipeline of the sulfide waste processor 701 is connected to the first conveying pipe 202.

[0024] During operation, the sulfide waste liquid generated by treating battery molds or sulfide waste in the laboratory fume hood is added to the sulfide waste processor 701, and an acidic solution is added to the sulfide waste processor 701. After the reaction, the mixed solution is heated by the sulfide waste processor 701. Hydrogen sulfide gas is generated during the reaction and heating process. The generated hydrogen sulfide gas is transferred to the first conveying pipe 202 through the output pipeline of the sulfide waste processor 701 and the exhaust pump 702, and is discharged into the alkaline solution chamber in the absorption tower 201 through the one-way air outlet ring 204. The treatment method of the waste liquid is to use a phosphoric acid acid solution for treatment, and then heat it after treatment to fully remove hydrogen sulfide. Taking Li3PS4 sulfide solid electrolyte as an example for a simple explanation, the sulfide waste will be treated in the fume hood to obtain a solution containing five elements of Li, P, S, O, and H. Part of the sulfur element will become hydrogen sulfide due to deliquescence and run away. Due to the presence of P and O elements, the solution will be in the form of PO4 3- The solution is then heated to remove the residual sulfur. 2- With H + The solution then becomes a lithium phosphate solution, and the lithium element is later extracted through purification to avoid the loss of the element.

[0025] Embodiment 2:

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the absorption reaction component 2 includes an absorption tower 201 fixedly mounted on the base plate 101, a first delivery pipe 202 fixedly mounted on the absorption tower 201, the first delivery pipe 202 is connected to the output pipeline of the sulfide waste processor 701, a one-way air outlet ring 204 is fixedly mounted on the first delivery pipe 202, a plurality of one-way air outlet rings 204 are provided, and the number is set according to demand, and the one-way air outlet rings 204 are all provided with annular one-way air outlet holes for discharging hydrogen sulfide gas, an isolation plate 205 and a ventilation plate 206 are also fixedly mounted on the first delivery pipe 202, the isolation plate 205 and the ventilation plate 206 constitute an alkali liquid chamber, the ventilation plate 206 is provided with an exhaust hole for discharging waste gas, and a waste gas outlet 203 for discharging waste gas is also fixedly mounted on the first delivery pipe 202.

[0027] The solution regeneration component 3 includes a stirring kettle 301 fixedly mounted on the bottom plate 101, on which a precipitation plate 304 for precipitating sulfur is detachably mounted, the precipitation plate 304 divides the stirring kettle 301 into upper and lower chambers, a drain valve 305 for discharging liquid is fixedly mounted on the precipitation plate 304, a removable baffle 303 for closing the stirring kettle 301 is also detachably mounted on the stirring kettle 301, a first motor 302 is also fixedly mounted on the stirring kettle 301, and a stirring roller 306 for stirring the mixed solution is fixedly mounted on the output shaft of the first motor 302.

[0028] The concentration detection component 4 includes an operating system 401 fixedly mounted on a mounting bracket 102, a first detector 402 and a second detector 403 fixedly mounted on the operating system 401, the first detector 402 is fixedly mounted with a first probe 404 for detecting the concentration of alkali solution via connecting wires, the first probe 404 is fixedly mounted with an alkali solution chamber formed by an isolation plate 205 and a ventilation plate 206, the second detector 403 is fixedly mounted with a second probe 405 for detecting the concentration of alkali solution via connecting wires, and the second probe 405 is fixedly mounted with the upper chamber of the stirring tank 301.

[0029] The transfer assembly 5 includes a first transfer pump 501 and a second transfer pump 502 fixedly mounted on the base plate 101. The first transfer pump 501 is provided with an input pipe and an output pipe. The input pipe of the first transfer pump 501 is connected to the alkali solution chamber formed by the isolation plate 205 and the ventilation plate 206, and the output pipe of the first transfer pump 501 is connected to the upper chamber of the stirring tank 301. The second transfer pump 502 is provided with an input pipe and an output pipe. The input pipe of the second transfer pump 502 is connected to the lower chamber of the stirring tank 301, and the output pipe of the second transfer pump 502 is connected to the alkali solution chamber formed by the isolation plate 205 and the ventilation plate 206.

[0030] The adding component 6 includes a hydrogen peroxide storage tank 601 fixedly mounted on the bottom plate 101, a second delivery pipe 603 fixedly mounted on the hydrogen peroxide storage tank 601, the second delivery pipe 603 connecting the hydrogen peroxide storage tank 601 with the upper chamber of the stirring tank 301, an adding pump 602 for transferring hydrogen peroxide fixedly mounted on the hydrogen peroxide storage tank 601, and the adding pump 602 is fixedly mounted on the hydrogen peroxide storage tank 601.

[0031] During operation, a certain amount of sodium hydroxide solution is added into the alkali liquid chamber formed by the isolation plate 205 and the ventilation plate 206, and the hydrogen sulfide gas discharged into the first delivery pipe 202 through the output pipeline of the sulfide waste processor 701 is dispersed and discharged into the solution in the alkali liquid chamber through the one-way air outlet ring 204, and the discharged hydrogen sulfide gas is absorbed, and the waste gas after absorption is discharged through the exhaust hole of the ventilation plate 206, and is completely discharged through the waste gas outlet 203. The sodium hydroxide concentration in the alkali liquid chamber is detected by the first detector 402. When it is found that the sodium hydroxide concentration in the chamber is reduced to not meet the hydrogen sulfide absorption requirement, the exhaust pump 702 stops working, the supply of hydrogen sulfide gas is suspended, and the second transfer pump 502 is started to transfer the neutralized liquid in the alkali liquid chamber to the upper chamber of the stirring tank 301. After the transfer is completed, the addition pump 602 is started to add a certain amount of hydrogen peroxide to the upper chamber of the stirring tank 301, and the first motor 30 is started at the same time. 2 drives the stirring roller 306 to rotate, stirs the solution in the upper chamber of the stirring kettle 301, and detects the sodium hydroxide concentration in the upper chamber of the stirring kettle 301 through the second detector 403. When it is found that the sodium hydroxide concentration in the chamber reaches the absorption requirement of hydrogen sulfide, the first motor 302 stops and waits for the sulfur element to precipitate on the precipitation plate 304. After the precipitation is completed, the drain valve 305 is started to discharge the solution in the upper chamber of the stirring kettle 301 into the lower chamber of the stirring kettle 301, and the first transfer pump 501 is started at the same time to transfer the solution in the lower chamber of the stirring kettle 301 to the alkali solution chamber of the absorption tower 201 again. After the transfer is completed, the detachable baffle 303 is disassembled, and then the precipitation plate 304 is taken out, the sulfur element on the precipitation plate 304 is collected, and the precipitation plate 304 is installed in the stirring kettle 301 again. The stirring kettle 301 is sealed by the detachable baffle 303, and then the treatment of hydrogen sulfide and the reuse of sodium hydroxide are completed.

[0032] The main reaction equations in the hydrogen sulfide absorption process are as follows:

[0033] H2S (gas) + H2O (liquid) = H2S (liquid) + H2O (liquid);

[0034] H2S (liquid) = H + +HS - ;

[0035] HS - =H + +S2- ;

[0036] S 2- +H2O2=S+ 2OH - .

[0037] Embodiment 3:

[0038] like Figure 1 , Figure 2 , Figure 3 As shown, the working principle of a system for treating sulfide electrolyte waste is as follows: during operation, a part of the sulfide electrolyte treated by immersion in a fume hood generates hydrogen sulfide gas, and a part forms sulfide waste liquid. The hydrogen sulfide gas is directly pumped into the alkaline liquid chamber of the absorption tower 201 filled with sodium hydroxide solution through an exhaust pump 702, and the sulfide waste liquid is treated by adding phosphoric acid solution and then heating, and the excess hydrogen sulfide gas is discharged and pumped into the alkaline liquid chamber of the absorption tower 201. The remaining solution is recovered for the next purification process, and the neutralized liquid in the alkaline liquid chamber of the absorption tower 201 is pumped into the upper chamber of the stirring tank 301 through a second transfer pump 502. The sodium hydroxide solution is regenerated in the chamber. After the neutralized liquid enters the upper chamber of the stirring tank 301, the agitator is turned on and industrial hydrogen peroxide is added. When the second detector 403 shows that the sodium hydroxide concentration in the upper chamber of the stirring tank 301 reaches the hydrogen sulfide absorption requirement, the stirring is stopped. After the elemental sulfur is deposited, the first transfer pump 501 transfers the sodium hydroxide solution to the absorption tower, and the elemental sulfur is recovered. When the neutralized liquid in the alkali solution chamber of the absorption tower 201 reaches the solution regeneration standard after being detected by the first detector 402, the second transfer pump 502 is turned on to transfer the neutralized liquid to the upper chamber of the stirring tank 301 for solution regeneration to form a closed loop.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A system for treating sulfide electrolyte waste, comprising a support assembly (1) and a concentration detection assembly (4), characterized in that: The system comprises a heating treatment component (7), an absorption reaction component (2), a transfer component (5), a solution regeneration component (3), and an addition component (6) which are sequentially mounted on a support component (1); the heating treatment component (7) comprises a sulfide waste processor (701) mounted on the support component (1) for treating sulfide electrolyte waste; the sulfide waste processor (701) is provided with an output pipeline for discharging hydrogen sulfide gas; an exhaust pump (702) for increasing the flow rate of hydrogen sulfide gas is installed on the output pipeline of the sulfide waste processor (701); and the output pipeline of the sulfide waste processor (701) is connected to the absorption reaction component (2).

2. A system for treating sulfide electrolyte waste according to claim 1, characterized in that: The absorption reaction assembly (2) comprises an absorption tower (201) fixedly mounted on a support assembly (1); a first delivery pipe (202) fixedly mounted on the absorption tower (201); the first delivery pipe (202) being connected to an output pipe of a sulfide waste processor (701); a one-way air outlet ring (204) fixedly mounted on the first delivery pipe (202); a plurality of one-way air outlet rings (204) being provided on the one-way air outlet ring (204); each of the plurality of one-way air outlet rings (204) being provided with an annular one-way air outlet hole for discharging hydrogen sulfide gas; an isolation plate (205) and a ventilation plate (206) being fixedly mounted on the first delivery pipe (202); the isolation plate (205) and the ventilation plate (206) forming an alkali liquid chamber; the ventilation plate (206) being provided with an exhaust hole for discharging waste gas; and a waste gas outlet (203) for discharging waste gas being fixedly mounted on the first delivery pipe (202).

3. A system for treating sulfide electrolyte waste according to claim 1, characterized in that: The transfer component (5) comprises a first transfer pump (501) and a second transfer pump (502) fixedly mounted on the support component (1); the first transfer pump (501) is provided with an input pipe and an output pipe; the input pipe of the first transfer pump (501) is connected to the absorption reaction component (2); the output pipe of the first transfer pump (501) is connected to the solution regeneration component (3); the second transfer pump (502) is provided with an input pipe and an output pipe; the input pipe of the second transfer pump (502) is connected to the solution regeneration component (3); the output pipe of the second transfer pump (502) is connected to the absorption reaction component (2).

4. A system for treating sulfide electrolyte waste according to claim 1, characterized in that: The solution regeneration component (3) comprises a stirring kettle (301) fixedly mounted on the support component (1); a precipitation plate (304) for precipitating sulfur is movably mounted on the stirring kettle (301); a drain valve (305) for discharging liquid is fixedly mounted on the precipitation plate (304); a detachable baffle (303) for collecting sulfur is also movably mounted on the stirring kettle (301); a first motor (302) is also fixedly mounted on the stirring kettle (301); a stirring roller (306) for stirring the mixed solution is fixedly mounted on the output shaft of the first motor (302).

5. A system for treating sulfide electrolyte waste according to claim 1, characterized in that: The adding component (6) comprises a hydrogen peroxide storage tank (601) fixedly mounted on the support component (1); a second delivery pipe (603) is fixedly mounted on the hydrogen peroxide storage tank (601); the second delivery pipe (603) connects the hydrogen peroxide storage tank (601) and the solution regeneration component (3); an adding pump (602) for transferring hydrogen peroxide is fixedly mounted on the hydrogen peroxide storage tank (601); the adding pump (602) is fixedly mounted on the hydrogen peroxide storage tank (601).

6. A system for treating sulfide electrolyte waste according to claim 1, characterized in that: The concentration detection component (4) comprises an operating system (401) fixedly mounted on a support component (1); a first detector (402) and a second detector (403) are fixedly mounted on the operating system (401); the first detector (402) is fixedly mounted with a first probe (404) for detecting the concentration of an alkali solution via a connecting wire; the first probe (404) is fixedly mounted to the absorption reaction component (2); the second detector (403) is fixedly mounted with a second probe (405) for detecting the concentration of an alkali solution via a connecting wire; the second probe (405) is fixedly mounted to the solution regeneration component (3).

Images