Electrolyte waste gas condensation system

Abstract

The utility model relates to an electrolyte waste gas condensing system, and relates to the field of waste power battery treatment, the electrolyte waste gas condensing system comprises a condenser and a storage tank, the condenser is provided with a first inlet and a first outlet, the first inlet is used for being connected with a gas inlet pipe, and the first outlet is used for being connected with a liquid outlet pipe; the storage tank is connected with the liquid outlet pipe, initial liquid is arranged in the storage tank, the end, away from the condenser, of the liquid outlet pipe extends into the initial liquid, and the storage tank is further provided with a gas port used for introducing inert gas. According to the electrolyte waste gas condensation system, inert gas is fed into the storage tank through the gas port to keep the storage tank in a micro-positive pressure state, and the end, away from the condenser, of the liquid outlet pipe extends into initial liquid, so that negative pressure environment isolation is formed between the condenser and the storage tank, air is prevented from leaking into the system, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present application relates to the field of waste power battery treatment, and in particular to an electrolyte waste gas condensation system. Background Art

[0002] Waste lithium batteries are usually recycled by crushing, sorting, pyrolysis, and de-powdering processes. The pyrolysis process removes the electrolyte in the battery by heating. Since most of the components in the electrolyte are organic matter, a large amount of inert gas (usually nitrogen) needs to be introduced during the crushing and pyrolysis process to keep the equipment in an oxygen-poor or oxygen-free environment to ensure the safe operation of the equipment. Therefore, a large amount of waste gas containing high-concentration electrolyte will be generated in the recycling of waste lithium batteries, and waste gas treatment must be carried out.

[0003] The main components of the electrolyte are ethylene carbonate, ethyl methyl carbonate, dimethyl carbonate, diethyl carbonate, etc., which have certain recovery value. Therefore, they are usually recovered by condensation and combined with activated carbon adsorption or oxidative incineration to purify the waste gas.

[0004] However, due to the low flash point and high saturated vapor pressure of dimethyl carbonate, ethyl methyl carbonate and the like, there is a risk of re-evaporation during the condensation, recovery and storage of electrolyte waste gas and entering the subsequent system, which may increase the concentration of organic matter in the waste gas of the subsequent system and cause a safety hazard. Utility Model Content

[0005] The purpose of the present application is to provide an electrolyte waste gas condensation system, which maintains the storage tank at a slightly positive pressure, and extends the end of the liquid outlet pipe away from the condenser into the initial liquid, thereby achieving negative pressure environment isolation between the condenser and the storage tank, preventing air leakage from entering the system, and reducing safety hazards.

[0006] To this end, an embodiment of the present application provides an electrolyte waste gas condensation system, comprising: a condenser, provided with a first inlet and a first outlet, the first inlet being used to be connected to an air inlet pipe, and the first outlet being used to be connected to a liquid outlet pipe; and a storage tank, connected to the liquid outlet pipe, an initial liquid being arranged in the storage tank, an end of the liquid outlet pipe away from the condenser extending into the initial liquid, and the storage tank is also provided with a gas port, and the gas port is used to introduce an inert gas.

[0007] In a possible implementation, the liquid outlet pipe is provided with a valve, and the valve is used to control the communication between the condenser and the storage tank.

[0008] In a possible implementation, an exhaust pipe is further included, wherein the exhaust pipe is connected to the liquid outlet pipe, and the exhaust pipe is located on a side of the valve facing the condenser.

[0009] In a possible implementation, the exhaust pipe is further provided with a drainage fan.

[0010] In a possible implementation manner, the condenser is provided with a second inlet and a second outlet, and the second inlet is located below the second outlet.

[0011] In a possible implementation, it also includes an isolation component, which includes a protection container and an insulation module. The protection container is provided with a protection cavity for passing an inert fluid. The storage tank is located in the protection cavity, and the storage tank is connected to the storage tank via the insulation module.

[0012] In a possible implementation, a plurality of the insulation modules are provided, and the plurality of insulation modules are arranged at intervals along the outer circumference of the storage tank.

[0013] In a possible implementation, the protection container is provided with a communication port communicating with the protection cavity, and the communication port is used for introducing an inert fluid and releasing the inert fluid.

[0014] In a possible implementation, at least two condensers are provided, one condenser corresponds to one storage tank, two adjacent condensers are connected by a connecting pipe, and one exhaust pipe is provided and connected to the liquid outlet pipe away from the air inlet pipe.

[0015] In a possible implementation, the protective container is provided at one and is used to cover at least two storage tanks.

[0016] According to the electrolyte waste gas condensation system provided by the embodiment of the present application, it includes a condenser and a storage tank. The condenser is provided with a first inlet and a first outlet. The first inlet is used to connect to the air inlet pipe, and the first outlet is used to connect to the liquid outlet pipe; the storage tank is connected to the liquid outlet pipe, and an initial liquid is provided in the storage tank. The end of the liquid outlet pipe away from the condenser extends into the initial liquid. The storage tank is also provided with an air port, and the air port is used to pass an inert gas. The electrolyte waste gas condensation system passes an inert gas into the storage tank through the air port to keep the storage tank in a slightly positive pressure state, and extends the end of the liquid outlet pipe away from the condenser into the initial liquid, so as to achieve a negative pressure environment isolation between the condenser and the storage tank, prevent air leakage from entering the system, and reduce safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0020] Figure 1 A schematic diagram showing a first electrolyte waste gas condensation system according to an embodiment of the present application;

[0021] Figure 2 A schematic diagram showing a second electrolyte waste gas condensation system according to an embodiment of the present application.

[0022] Description of reference numerals:

[0023] 1. Condenser; 11. First inlet; 12. First outlet; 13. Second inlet; 14. Second outlet; 2. Storage tank; 21. Air port; 3. Air inlet pipe; 4. Liquid outlet pipe; 5. Valve; 6. Exhaust pipe; 7. Drainage fan; 8. Isolation component; 81. Protection container; 811. Connecting port; 82. Insulation module. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0025] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0026] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0027] Figure 1 A schematic diagram showing a first electrolyte waste gas condensation system according to an embodiment of the present application.

[0028] like Figure 1 As shown, an embodiment of the present application provides an electrolyte waste gas condensation system, which includes a condenser 1 and a storage tank 2. The condenser 1 is provided with a first inlet 11 and a first outlet 12. The first inlet 11 is used to be connected to the air inlet pipe 3, and the first outlet 12 is used to be connected to the liquid outlet pipe 4; the storage tank 2 is connected to the liquid outlet pipe 4, and an initial liquid is provided in the storage tank 2. The end of the liquid outlet pipe 4 away from the condenser 1 extends into the initial liquid. The storage tank 2 is also provided with a gas port 21, and the gas port 21 is used to introduce an inert gas.

[0029] It should be understood that the electrolyte waste gas condensation system includes a condenser 1, which is a heat exchange device used to cool and condense the gas in the condenser 1 to form a liquid for collection and treatment. The condenser 1 is provided with a first inlet 11 and a first outlet 12. The first inlet 11 is used to connect with the air inlet pipe 3, so that the electrolyte waste gas passes from the air inlet pipe 3 into the condenser 1 for cooling, and the waste gas condenses in the condenser 1 to form a liquid. The first outlet 12 is used to connect with the liquid outlet pipe 4, and the condensed liquid is discharged from the liquid outlet pipe 4. Among them, the main components of the electrolyte waste gas are ethylene carbonate, ethyl methyl carbonate, dimethyl carbonate, diethyl carbonate, etc., which have certain recovery value, so it is usually recovered by condensation, and combined with activated carbon adsorption or oxidative incineration to purify the waste gas.

[0030] The electrolyte waste gas condensation system also includes a storage tank 2, which is connected to the end of the liquid outlet pipe 4 away from the condenser 1, so that the condensed liquid enters the storage tank 2 from the liquid outlet pipe 4 for storage and collection. The storage tank 2 is provided with an initial liquid, and the composition of the initial liquid is the same as the organic component / condensable component in the waste gas. The end of the liquid outlet pipe 4 away from the condenser 1 extends into the initial liquid, which reduces the liquid evaporation surface, reduces the re-evaporation of the condensed liquid into the system, and reduces the safety hazard caused by the increase in the concentration of organic matter in the waste gas of the subsequent system.

[0031] A discharge port is also provided below the storage tank 2 for discharging the liquid in the storage tank 2. After the storage tank 2 has collected the condensed liquid, the operator can discharge the condensed liquid through the discharge port, which is provided below the storage tank 2 for discharging the liquid.

[0032] Furthermore, the storage tank 2 is also provided with an air port 21, which is used to introduce an inert gas, which does not react chemically with the condensed liquid. In one example, the inert gas is nitrogen. When in use, the inert gas is introduced into the storage tank 2 through the air port 21 to keep the storage tank 2 at a slightly positive pressure, and the end of the liquid outlet pipe 4 away from the condenser 1 is extended into the initial liquid to achieve a negative pressure environment isolation between the condenser 1 and the storage tank 2, thereby preventing air leakage from entering the system and reducing safety hazards.

[0033] The gas port 21 is disposed above the storage tank 2 to facilitate the operator to introduce the inert gas, while also reducing the impact of the inert gas on the liquid in the storage tank 2 .

[0034] Reference Figure 1 In some optional embodiments, the liquid outlet pipe 4 is provided with a valve 5, and the valve 5 is used to control the connection between the condenser 1 and the storage tank 2. When the condenser 1 is condensing, the valve 5 is opened to connect the condenser 1 with the storage tank 2, so that the condensed liquid flows smoothly from the condenser 1 into the storage tank 2. After the condenser 1 is condensed, the condensed liquid flows from the condenser 1 into the storage tank 2, and the operator can close the valve 5 at the liquid outlet pipe 4 to prevent the condensed liquid from volatilizing again during the shutdown process and entering the subsequent system, thereby further reducing safety hazards.

[0035] In some optional embodiments, an exhaust pipe 6 is further included, and the exhaust pipe 6 is connected to the liquid outlet pipe 4, and the exhaust pipe 6 is located on the side of the valve 5 facing the condenser 1. The exhaust pipe 6 can discharge the gas in the liquid outlet pipe 4, thereby reducing the gas entering the storage tank 2, and further reducing the gas in the storage tank 2, further preventing the liquid condensed during the shutdown process from volatilizing again and entering the subsequent system, thereby reducing safety hazards. The exhaust pipe 6 is located on the side of the valve 5 facing the condenser 1, that is, when the condenser 1 is completed, the exhaust pipe 6 can still discharge the remaining exhaust gas in the condenser 1 without affecting the storage tank 2. An exhaust gas treatment unit can be provided at the end of the exhaust pipe 6 away from the valve 5, so as to further process the gas discharged from the exhaust pipe 6 and reduce air pollution.

[0036] Reference Figure 1 In some optional embodiments, the exhaust pipe 6 is further provided with a drainage fan 7. The drainage fan 7 can be any fan, and the present application does not limit the model of the drainage fan 7. The drainage fan 7 is connected to the exhaust pipe 6, and the gas in the exhaust pipe 6 can be drained out to improve the exhaust effect of the exhaust pipe 6. At the same time, the residual exhaust gas in the condenser 1 can be discharged, the residual exhaust gas in the condenser 1 can be reduced, and the condenser 1 can be protected.

[0037] In some optional embodiments, the condenser 1 is provided with a second inlet 13 and a second outlet 14, and the second inlet 13 is located below the second outlet 14. The condensing medium introduced into the condenser 1 can be a gas or a liquid. The present application does not limit the condensing medium, and the medium can be selected according to the exhaust gas to be condensed. The second inlet 13 is located below the second outlet 14, which can further increase the residence time of the condensing medium in the condenser 1, improve the heat exchange effect of the condenser 1, and reduce the cost of condensing gas or condensing liquid. When the condenser 1 is working, the condensing medium is introduced into the condenser 1 from the second inlet 13, and then the condensing medium after heat exchange flows out from the second outlet 14.

[0038] In some optional embodiments, an isolation assembly 8 is further included. The isolation assembly 8 includes a protection container 81 and an insulation module 82. The protection container 81 is provided with a protection cavity for passing an inert fluid. The storage tank 2 is located in the protection cavity. The storage tank 2 is connected to the storage tank 2 through the insulation module 82.

[0039] Among them, the present application does not limit the shape of the protection container 81. The protection container 81 can be spherical, rectangular or any other shape. The protection container 81 is provided with a protection cavity, and the storage tank 2 is located in the protection cavity, so that the protection container 81 protects the storage tank 2.

[0040] Furthermore, the insulating module 82 is made of non-conductive materials, such as ceramics, wood, etc. The insulating module 82 isolates the outer wall of the storage tank 2 from the inner wall of the protection container 81, so that the outer wall of the storage tank 2 does not contact the inner wall of the protection container 81. An inert fluid, such as nitrogen or liquid nitrogen, is passed into the protective cavity, so that the outer wall of the storage tank 2 is provided with an inert fluid, thereby realizing electrostatic isolation of the storage tank 2 and preventing environmental static electricity from being introduced into the storage tank 2 and causing safety risks.

[0041] The discharge port of the storage tank 2 extends out of the protective container 81 to facilitate the operator to collect the condensed liquid.

[0042] In some optional embodiments, multiple insulating modules 82 are provided, and the multiple insulating modules 82 are arranged at intervals along the outer peripheral side of the storage tank 2. The multiple insulating modules 82 can be respectively provided above, on the peripheral side, or on the bottom of the storage tank 2, so as to isolate the outer wall of the storage tank 2 from the inner wall of the protection container 81, and the provision of multiple insulating modules 82 can also improve the stability of the installation of the storage tank 2 and the protection container 81.

[0043] In some optional embodiments, the protection container 81 is provided with a communication port 811 communicating with the protection cavity, and the communication port 811 is used to introduce and release the inert fluid. The communication port 811 is provided to facilitate the operator to add or release the inert fluid. In order to facilitate the addition of the inert fluid, the communication port 811 is located above or on the upper side of the protection container 81.

[0044] Reference Figure 2 , Figure 2 A schematic diagram of a second electrolyte waste gas condensation system of an embodiment of the present application is shown. In some optional embodiments, at least two condensers 1 are provided, one condenser 1 corresponds to one storage tank 2, two adjacent condensers 1 are connected by a connecting pipe, and one exhaust pipe 6 is provided and connected to the liquid outlet pipe 4 away from the air inlet pipe 3. Two, three or other numbers of condensers 1 can be provided, and the present application does not limit the number of condensers 1. The temperature of the condensing medium in at least two condensers 1 can be successively reduced along the flow direction of the exhaust gas, further improving the condensation effect of the exhaust gas.

[0045] In an example, two condensers 1 are provided for illustration. The two condensers 1 correspond to two storage tanks 2 through two liquid outlet pipes 4 respectively. The two liquid outlet pipes 4 extend respectively under the initial liquid of the two storage tanks 2. The two liquid outlet pipes 4 are also provided with valves 5 respectively, wherein only one air inlet pipe 3 and one exhaust pipe 6 are provided. One condenser 1 is connected to the air inlet pipe 3, and the condenser 1 is connected to the other condenser 1 through a connecting pipe. The other condenser 1 is connected to the exhaust pipe 6, and the exhaust pipe 6 is connected to the drainage fan 7.

[0046] The number of protection containers 81 in the isolation assembly 8 corresponds to the number of storage tanks 2 , and the two protection containers 81 protect and isolate the two storage tanks 2 respectively to prevent environmental static electricity from being introduced into the storage tanks 2 and causing safety risks.

[0047] In some optional embodiments, one protective container 81 is provided and is used to cover at least two storage tanks 2. One protective container 81 is provided, and all storage tanks 2 are arranged in the protective cavity, thereby reducing the number of protective containers 81 and facilitating the operator to control and observe the conditions in the protective container 81. In one example, two storage tanks 2 are located in the protective cavity of the protective container 81.

[0048] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0049] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0050] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An electrolyte waste gas condensation system, characterized in that: include: The condenser is provided with a first inlet and a first outlet, wherein the first inlet is used to be connected to the air inlet pipe, and the first outlet is used to be connected to the liquid outlet pipe; as well as A storage tank is connected to the liquid outlet pipe, wherein the storage tank is provided with initial liquid, and one end of the liquid outlet pipe away from the condenser extends into the initial liquid. The storage tank is also provided with an air port for introducing an inert gas.

2. The electrolyte waste gas condensation system according to claim 1, characterized in that: The liquid outlet pipe is provided with a valve, and the valve is used to control the communication between the condenser and the storage tank.

3. The electrolyte waste gas condensation system according to claim 2, characterized in that: It also includes an exhaust pipe, which is connected to the liquid outlet pipe and is located on a side of the valve facing the condenser.

4. The electrolyte waste gas condensation system according to claim 3, characterized in that: The exhaust pipe is also provided with a drainage fan.

5. The electrolyte waste gas condensation system according to claim 1, characterized in that: The condenser is provided with a second inlet and a second outlet, and the second inlet is located below the second outlet.

6. The electrolyte waste gas condensation system according to claim 3, characterized in that: It also includes an isolation component, which includes a protection container and an insulation module. The protection container is provided with a protection cavity for introducing an inert fluid. The storage tank is located in the protection cavity, and the storage tank is connected to the storage tank via the insulation module.

7. The electrolyte waste gas condensation system according to claim 6, characterized in that: A plurality of the insulating modules are provided, and the plurality of insulating modules are arranged at intervals along the outer circumference of the storage tank.

8. The electrolyte waste gas condensation system according to claim 6, characterized in that: The protection container is provided with a communication port communicating with the protection cavity, and the communication port is used for introducing an inert fluid and releasing the inert fluid.

9. The electrolyte waste gas condensation system according to claim 6, characterized in that: At least two condensers are provided, one condenser corresponds to one storage tank, and two adjacent condensers are connected via a connecting pipe. One exhaust pipe is provided and connected to the liquid outlet pipe away from the air inlet pipe.

10. The electrolyte waste gas condensation system according to claim 9, characterized in that: The protection container is provided with one and is used for covering at least two storage tanks.

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