Recyclable decolorizing device in methylene methanedisulfonate production

Abstract

The utility model provides a recyclable decolorizing device in methylene methanedisulfonate production, which comprises a feed port, a steam inlet and an air stripping vent nozzle which are arranged at the top, and a liquid outlet and a ventilation port which are arranged at the bottom, the inner cavity of the decolorizing tank is filled with a filler layer; the reaction completion liquid feeding pipeline is connected with the feeding opening; the discharging pipeline is connected with the liquid discharging opening; the outlet end of the air stripping pipeline is connected with the air stripping emptying opening; and the emptying pipeline is connected with the air stripping emptying port. The decolorizing device disclosed by the utility model is reasonable in structural design, convenient to operate, recyclable, cost-saving and small in environmental pollution.

Description

Technical Field

[0001] The utility model belongs to the field of methylene methanedisulfonate production equipment, in particular to a recyclable decolorization device in the production of methylene methanedisulfonate. Background Art

[0002] Methylene methanedisulfonate (MMDS) is a new electrolyte additive for lithium-ion batteries. When added to lithium-ion battery electrolyte production, the addition of MMDS can significantly improve the high-temperature cycling performance and significantly extend the battery's service life. It is suitable for power batteries, particularly those using lithium manganese oxide as the positive electrode material. MMDS prevents high-temperature-melted manganese from adsorbing on the negative electrode surface, suppressing impedance increases and effectively improving cycle characteristics, significantly increasing cycle life.

[0003] During the synthesis of methylene methanedisulfonate, the reaction solution must be decolorized before undergoing subsequent processing to obtain the final product. Existing techniques typically involve adding activated carbon to the reaction solution for decolorization. However, activated carbon is disposable and must be filtered out after saturation with adsorption and disposed of as solid waste. This results in waste, high costs, environmental pollution, cumbersome procedures, and low efficiency. Utility Model Content

[0004] In view of this, in order to solve the above technical problems, the utility model proposes a recyclable decolorization device in the production of methylene methanedisulfonate, which has a reasonable structural design, is easy to operate, can be recycled and reused, saves costs, and has little environmental pollution.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0006] A recyclable decolorization device in the production of methylene methanedisulfonate, comprising:

[0007] A decolorizing tank, wherein the top of the decolorizing tank is provided with a feed port, a steam inlet and a blow-off vent, the bottom is provided with a drain port and a vent, and the inner cavity is filled with a filler layer;

[0008] Feed and discharge pipelines, the feed and discharge pipelines comprising a reaction completion liquid feed pipeline connected to the feed port and a discharge pipeline connected to the discharge port; valves are provided on both the reaction completion liquid feed pipeline and the discharge pipeline;

[0009] A stripping pipeline, wherein the outlet end of the stripping pipeline is connected to the stripping vent, and a valve is provided on the stripping pipeline;

[0010] A regeneration pipeline, comprising a steam supply pipeline connected to the steam inlet and a sewage discharge pipeline connected to the liquid discharge port; valves are provided on both the steam supply pipeline and the sewage discharge pipeline;

[0011] The blow-drying pipeline includes a compressed air supply pipeline connected to the vent and a venting pipeline connected to the blow-off vent; valves are provided on the compressed air supply pipeline and the venting pipeline.

[0012] The valve on the feed and discharge pipeline is opened, and the reaction completion liquid is fed into the feed port through the reaction completion liquid feed pipeline, flows into the decolorization tank, and after being decolorized by the packing layer, is discharged from the discharge port, flows into the discharge pipeline, and is sent to the next process;

[0013] When the packing layer is saturated with adsorption, the packing layer is regenerated by steam regeneration: the valves on the feed and discharge pipelines are closed, and the valves on the stripping pipeline and the sewage pipeline are opened. Inert gas enters the decolorization tank through the stripping pipeline and the stripping vent to blow away the remaining liquid in the decolorization tank; the valve on the stripping pipeline is closed, and the valve on the steam supply pipeline is opened. High-temperature steam enters the decolorization tank through the steam supply pipeline and the steam inlet to desorb and regenerate the packing layer. The sewage generated during the regeneration process enters the sewage pipeline through the drainage port and is discharged; after the regeneration is completed, the valve on the regeneration pipeline is closed, and the valve on the drying pipeline is opened. Compressed air enters the decolorization tank through the compressed air supply pipeline and the vent to dry the packing layer. The blown air is discharged through the vent pipeline; after the regeneration is completed, the valve on the drying pipeline is closed, and the regeneration of the decolorization device is completed. This can realize the recycling of the decolorization device, save costs, reduce solid waste products, have little pollution to the environment, and is convenient to operate. There is no need to manually filter the packing after each batch of decolorization, which improves work efficiency and reduces workload.

[0014] Furthermore, the decolorization tank includes a tank body, a tank cover detachably mounted on the top of the tank body, and a bottom cover detachably mounted on the bottom of the tank body; the feed port, the steam inlet, and the blow-off vent are all arranged on the tank cover; the drain port and the vent are both arranged on the bottom cover.

[0015] The decolorization tank is of detachable split type, which is convenient for later maintenance. After repeated adsorption decolorization-regeneration process, when the decolorization effect of the packing layer is lower than the specified value, the decolorization tank can be disassembled and the packing layer can be replaced.

[0016] Furthermore, the inner cavity of the tank body is provided with an installation slot along the circumferential direction; the filler layer includes a detachable outer ring support layer inserted on the installation slot and an activated carbon particle filler layer filled in the outer ring support layer; the upper end face and the lower end face of the outer ring support layer are both filter structures.

[0017] Furthermore, a plurality of mounting slots are provided in the tank body at equal intervals along the vertical direction; and there are a plurality of filler layers, which are mounted on the mounting slots in a one-to-one correspondence.

[0018] Furthermore, it also includes a heat exchanger; the outlet end of the sewage pipeline is connected to the hot medium flow channel of the heat exchanger and then connected to an external sewage treatment system; the outlet end of the compressed air supply pipeline is connected to the cold medium flow channel of the heat exchanger and then connected to the vent.

[0019] The sewage generated during the regeneration process itself has a certain amount of heat. This part of the heat is exchanged with the compressed air in the compressed air supply pipeline through the heat exchanger, and the temperature of the compressed air is increased. After the compressed air with increased temperature enters the decolorization tank, it can dry the filler layer faster, thereby improving the drying efficiency and utilizing the waste heat.

[0020] Furthermore, there are two decolorization tanks, which are arranged in parallel; the reaction completion liquid feed pipeline is respectively connected to the feed ports of the two decolorization tanks, and two independent valves are respectively set correspondingly; the discharge pipeline is respectively connected to the discharge ports of the two decolorization tanks, and two independent valves are respectively set correspondingly; the stripping pipeline is respectively connected to the stripping vent ports of the two decolorization tanks, and two independent valves are respectively set correspondingly; the steam supply pipeline is respectively connected to the steam inlet of the two decolorization tanks, and two independent valves are respectively set correspondingly; the sewage pipeline is respectively connected to the discharge ports of the two decolorization tanks, and two independent valves are respectively set correspondingly; the compressed air supply pipeline is respectively connected to the vents of the two decolorization tanks, and two independent valves are respectively set correspondingly; there are two vent pipelines, each of which is connected to the stripping vent ports of the two decolorization tanks, and both are provided with valves.

[0021] By setting two decolorization tanks in parallel, continuous production can be achieved, and at least one decolorization tank is always kept in operation to avoid affecting the normal decolorization process due to regeneration operation.

[0022] Compared with the prior art, the recyclable decolorization device in the production of methylene methanedisulfonate described in the present invention has the following advantages:

[0023] (1) The recyclable decolorization device in the production of methylene methanedisulfonate described in the utility model has a reasonable structural design. Through the improvement of the structure of the decolorization tank and the reasonable design of the pipeline route, the decolorization-regeneration cycle can be repeated, which saves costs, reduces solid waste products, has little pollution to the environment, is easy to operate, does not require manual filtering of fillers after each batch of decolorization, improves work efficiency, and reduces workload;

[0024] (2) The recyclable decolorization device in the production of methylene methanedisulfonate described in the present invention exchanges heat between the residual heat in the sewage generated during the regeneration process and the compressed air used to dry the packing layer, thereby increasing the temperature of the compressed air. While drying the packing layer more quickly, the residual heat of the sewage is also reused;

[0025] (3) The recyclable decolorization device in the production of methylene disulfonate described in the utility model adopts a method of setting two decolorization tanks in parallel, and then arranging corresponding pipeline route valves to achieve the purpose of non-stop decolorization operation and continuous operation, with high work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Figure 1 This is a schematic structural diagram of a recyclable decolorization device in the production of methylene methanedisulfonate according to an embodiment of the present utility model.

[0028] Description of reference numerals:

[0029] 1-decolorization tank, 2-heat exchanger, 3-blowing pipeline, 4-tank body, 5-tank cover, 6-bottom cover, 7-feed port, 8-steam inlet, 9-blowing vent port, 10-drain port, 11-vent, 12-packing layer, 13-installation slot, 14-outer ring support layer, 15-activated carbon particle packing layer, 16-reaction completion liquid feed pipeline, 17-discharge pipeline, 18-steam supply pipeline, 19-sewage pipeline, 20-compressed air supply pipeline, 21-vent pipeline. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0031] In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0032] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0034] like Figure 1 As shown, a recyclable decolorization device in the production of methylene methane disulfonate includes a decolorization tank 1, a heat exchanger 2, a feed and discharge pipeline, a blow-off pipeline 3, a regeneration pipeline, and a blow-drying pipeline;

[0035] Among them, the decolorization tank 1 includes a tank body 4, a tank cover 5 detachably mounted on the top of the tank body 4 and a bottom cover 6 detachably mounted on the bottom of the tank body 4; the tank cover 5 is provided with a feed port 7, a steam inlet 8 and a blow-off vent 9; the bottom cover 6 is provided with a drain port 10 and a vent 11; the inner cavity of the tank body 4 is filled with a packing layer 12; the inner cavity of the tank body 4 is provided with a mounting slot 13 along the circumference, and there are multiple mounting slots 13, which are arranged at equal intervals along the vertical direction; the packing layer 12 includes an outer ring support layer 14 detachably inserted into the mounting slot 13 and an activated carbon particle packing layer 15 filled in the outer ring support layer 14; the upper end surface and the lower end surface of the outer ring support layer 14 are both filter mesh structures; there are multiple packing layers 12, which are installed one-to-one on the mounting slots 13; there are two decolorization tanks 1, which are arranged in parallel;

[0036] The feed and discharge pipelines include a reaction completion liquid feed pipeline 16 and a discharge pipeline 17; the reaction completion liquid feed pipeline 16 is connected to the feed ports 7 of the two decolorization tanks 1, and two independent valves are provided for each; the discharge pipeline 17 is connected to the discharge ports 10 of the two decolorization tanks 1, and two independent valves are provided for each;

[0037] The stripping pipeline 3 is connected to the stripping vents 9 of the two decolorization tanks 1, and two independent valves are provided correspondingly;

[0038] The regeneration pipeline includes a steam supply pipeline 18 and a sewage pipeline 19; the steam supply pipeline 18 is respectively connected to the steam inlet 8 of the two decolorization tanks 1, and two independent valves are respectively provided; the sewage pipeline 19 is respectively connected to the discharge port 10 of the two decolorization tanks 1, and two independent valves are respectively provided. The outlet end of the sewage pipeline 19 is connected to the heat medium flow channel of the heat exchanger 2 and then connected to the external sewage treatment system;

[0039] The drying pipeline includes a compressed air supply pipeline 20 and a venting pipeline 21; the outlet end of the compressed air supply pipeline 20 is connected to the cold medium flow channel of the heat exchanger 2, and then connected to the vents 11 of the two decolorization tanks 1 respectively, and two independent valves are set correspondingly; there are two venting pipelines 21, each of which is connected to the blow-off vent 9 of the two decolorization tanks 1, and both are equipped with valves.

[0040] The working process of the recyclable decolorization device in the production of methylene methanedisulfonate described in the utility model is as follows:

[0041] Decolorization: Open the valve on the feed and discharge pipelines, and the reaction liquid is fed into the feed port 7 through the reaction liquid feed pipeline 16, flows into the decolorization tank 1, and after being decolorized by the packing layer 12, is discharged from the drain port 10, flows into the discharge pipeline 17, and is sent to the next process;

[0042] After the packing layer 12 is saturated with adsorption, regeneration is carried out: the valves on the feed and discharge pipelines are closed, the valves on the stripping pipeline 3 and the sewage pipeline 19 are opened, and the inert gas enters the decolorization tank 1 through the stripping pipeline 3 and the stripping vent 9 to blow away the remaining liquid in the decolorization tank 1; the valve on the stripping pipeline 3 is closed, the valve on the steam supply pipeline 18 is opened, and high-temperature steam enters the decolorization tank 1 through the steam supply pipeline 18 and the steam inlet 8 to desorb and regenerate the packing layer 12, and the sewage generated during the regeneration process enters the sewage pipeline 19 through the drain port 10 and is discharged; after the regeneration is completed, the valve on the regeneration pipeline is closed, the valve on the drying pipeline is opened, and compressed air enters the decolorization tank 1 through the compressed air supply pipeline 20 and the vent 11 to dry the packing layer 12, and the blown air is discharged through the vent line 21; after the end, the valve on the drying pipeline is closed to complete the regeneration of the decolorization device.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A recyclable decolorization device in the production of methylene methanedisulfonate, characterized in that: include: A decolorizing tank, wherein the top of the decolorizing tank is provided with a feed port, a steam inlet and a blow-off vent, the bottom is provided with a drain port and a vent, and the inner cavity is filled with a filler layer; Feed and discharge pipelines, the feed and discharge pipelines comprising a reaction completion liquid feed pipeline connected to the feed port and a discharge pipeline connected to the discharge port; valves are provided on both the reaction completion liquid feed pipeline and the discharge pipeline; A stripping pipeline, wherein the outlet end of the stripping pipeline is connected to the stripping vent, and a valve is provided on the stripping pipeline; A regeneration pipeline, comprising a steam supply pipeline connected to the steam inlet and a sewage discharge pipeline connected to the liquid discharge port; valves are provided on both the steam supply pipeline and the sewage discharge pipeline; The blow-drying pipeline includes a compressed air supply pipeline connected to the vent and a venting pipeline connected to the blow-off vent; valves are provided on the compressed air supply pipeline and the venting pipeline.

2. The recyclable decolorizing device in the production of methylene methanedisulfonate according to claim 1, characterized in that: The decolorization tank includes a tank body, a tank cover detachably mounted on the top of the tank body, and a bottom cover detachably mounted on the bottom of the tank body; the feed port, the steam inlet, and the stripping vent are all arranged on the tank cover; the drain port and the vent are both arranged on the bottom cover.

3. The recyclable decolorizing device in the production of methylene methanedisulfonate according to claim 2, characterized in that: The inner cavity of the tank body is provided with an installation slot along the circumferential direction; the filler layer includes a detachable outer ring support layer inserted on the installation slot and an activated carbon particle filler layer filled in the outer ring support layer; the upper end surface and the lower end surface of the outer ring support layer are both filter structures.

4. The recyclable decolorizing device in the production of methylene methanedisulfonate according to claim 3, characterized in that: A plurality of installation slots are arranged in the tank body at equal intervals along the vertical direction; and there are a plurality of filler layers, which are installed in the installation slots in a one-to-one correspondence.

5. The recyclable decolorization device for the production of methylene methanedisulfonate according to any one of claims 1 to 4, characterized in that: It also includes a heat exchanger; the outlet end of the sewage pipeline is connected to the hot medium flow channel of the heat exchanger and then connected to an external sewage treatment system; the outlet end of the compressed air supply pipeline is connected to the cold medium flow channel of the heat exchanger and then connected to the vent.

6. The recyclable decolorization device in the production of methylene methanedisulfonate according to claim 5, characterized in that: There are two decolorization tanks, which are arranged in parallel; the reaction completion liquid feed pipeline is respectively connected to the feed ports of the two decolorization tanks, and two independent valves are respectively set correspondingly; the discharge pipeline is respectively connected to the discharge ports of the two decolorization tanks, and two independent valves are respectively set correspondingly; the stripping pipeline is respectively connected to the stripping vent ports of the two decolorization tanks, and two independent valves are respectively set correspondingly; the steam supply pipeline is respectively connected to the steam inlet of the two decolorization tanks, and two independent valves are respectively set correspondingly; the sewage pipeline is respectively connected to the discharge ports of the two decolorization tanks, and two independent valves are respectively set correspondingly; the compressed air supply pipeline is respectively connected to the vents of the two decolorization tanks, and two independent valves are respectively set correspondingly; there are two vent pipelines, each of which is connected to the stripping vent ports of the two decolorization tanks, and both are provided with valves.

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