CN210826106U - Oil ester refining retort of multistage heating - Google Patents
Oil ester refining retort of multistage heating Download PDFInfo
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- CN210826106U CN210826106U CN201921487994.9U CN201921487994U CN210826106U CN 210826106 U CN210826106 U CN 210826106U CN 201921487994 U CN201921487994 U CN 201921487994U CN 210826106 U CN210826106 U CN 210826106U
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Abstract
The utility model relates to the technical field of liquid chemical processing and insulating oil refining treatment, in particular to a multi-section heating oil ester refining reaction tank, which comprises a heat source inlet, a heat source outlet and n heating pipelines, wherein n is more than or equal to 3; the heat source inlet is positioned at the lower part of the reaction tank, and the heat source outlet is positioned at the upper part of the reaction tank; the n heating pipelines comprise n-1 inner heating pipelines and 1 outer heating pipeline, each inner heating pipeline is sequentially arranged in the tank body of the reaction tank from top to bottom, and the outer heating pipelines are arranged around the double-layer gap of the outer wall of the reaction tank; valves are respectively arranged between the inlets of the heating pipelines and the heat source inlets so as to control the heat source to enter the corresponding heating pipelines; the outlet of each heating pipeline is respectively connected with the outlet of the heat source. Different valves can be opened according to the quality or the volume of the oil sample in the reaction tank by the device, the optimal heating mode is selected, the multistage heating control is carried out, the working efficiency can be effectively improved, the energy consumption is saved, and the service life of a heating pipeline is prolonged.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a processing of liquid chemicals and insulating oil refining treatment technical field especially relate to a concise retort of oil ester of multistage heating.
[ background of the invention ]
The insulating oil is used as a liquid insulating medium and is an important insulating material in oil-filled electrical equipment, and the quality of the insulating oil has important influence on the insulating performance of the electrical equipment. The natural ester insulating oil is mainly composed of triglyceride (abbreviated as triglyceride), and further contains a small amount of higher alcohol, higher hydrocarbon, free fatty acid, vitamin, pigment, etc. As the chemical components of the natural ester insulating oil have weak polarity and large acid value, the conditions of dielectric loss and over-standard acid value are easy to occur in the production process of the vegetable insulating oil, and the acid value and the impurities are reduced by refining processes such as alkali refining, water washing and the like. The conventional oil treatment reaction tank heats the tank body integrally, and the heat source consumption cannot be flexibly selected according to the quantity of reaction samples. When the oil appearance is less, on the one hand the energy waste is great, and on the other hand the heating pipeline is not soaked completely to the oil appearance, causes the pipeline surface to expose in the air when heating state, and is ageing easily.
In view of the above, it is an urgent problem in the art to overcome the above-mentioned drawbacks of the prior art.
[ Utility model ] content
The utility model discloses the technical problem that needs to solve is:
the conventional reaction tank heats the tank body integrally, the heat source consumption is difficult to flexibly select according to the amount of reaction samples, when the oil sample is less, on one hand, the energy waste is large, on the other hand, the heating pipeline is not soaked completely by the oil sample, and the outer surface of the pipeline is exposed in the air and is easy to age in a heating state.
The utility model discloses a following technical scheme reaches above-mentioned purpose:
the utility model provides a multi-section heating oil ester refining reaction tank, which comprises a heat source inlet 7, a heat source outlet 8 and n heating pipelines, wherein the heat source inlet 7 is positioned at the lower part of the reaction tank, and the heat source outlet 8 is positioned at the upper part of the reaction tank;
the n heating pipelines comprise n-1 inner heating pipelines and 1 outer heating pipeline, the n-1 inner heating pipelines are sequentially arranged inside the tank body of the reaction tank from bottom to top or from top to bottom, and the outer heating pipelines are arranged around the double-layer gap of the outer wall of the reaction tank; wherein n is more than or equal to 3;
valves are respectively arranged between the inlets of the n heating pipelines and the heat source inlet 7 so as to control a heat source to enter the corresponding heating pipelines; and outlets of the n heating pipelines are respectively connected with the heat source outlet 8.
Preferably, the internal heating pipeline is formed by connecting an input pipeline 401, an output pipeline 402, an upper circular pipeline 403, a lower circular pipeline 404 and a plurality of upright pipeline 405 in a penetrating way;
the input pipeline 401 is connected with the lower circular pipeline 404, and the output pipeline 402 is connected with the upper circular pipeline 403; the upper circular pipe 403 and the lower circular pipe 404 are coaxially arranged up and down, and the plurality of upright pipes 405 are longitudinally arranged between the upper circular pipe and the lower circular pipe.
Preferably, the device also comprises a stirring motor 12 and n stirrers connected with the stirring motor 12; wherein, agitator motor 12 sets up outside the retort, n agitator sets gradually in the internal portion of jar of retort according to from the bottom up or from the top down order.
Preferably, each stirrer comprises one or more blades; in the n stirrers, the blade of the stirrer at the lowest position is V-shaped, and the blades of the rest stirrers are all linear.
Preferably, the reactor further comprises a first feeding hole 13, a second feeding hole 14 and a discharging hole 15, wherein the first feeding hole 13 and the second feeding hole 14 are positioned at the top of the reaction tank, and the discharging hole 15 is positioned at the bottom of the reaction tank;
wherein, the first feed inlet 13 is used for inputting an oil sample to be treated, and the second feed inlet 14 is used for inputting alkali liquor or soft water.
Preferably, when n is 3, the heating pipelines include a first heating pipeline 4, a second heating pipeline 5 and a third heating pipeline 6;
the first heating pipeline 4 and the second heating pipeline 5 are internal heating pipelines, the first heating pipeline 4 is arranged at the lower half part in the reaction tank, and the second heating pipeline 5 is arranged at the upper half part in the reaction tank; the third heating pipeline 6 is an external heating pipeline and is arranged around the double-layer gap of the outer wall of the reaction tank;
the first heating pipeline 4 is connected with the heat source inlet 7 through a first heating pipeline valve 1, the second heating pipeline 5 is connected with the heat source inlet 7 through a second heating pipeline valve 2, and the third heating pipeline 6 is connected with the heat source inlet 7 through a third heating pipeline valve 3.
Preferably, the stirring device further comprises a stirring motor 12, and a first stirrer 9, a second stirrer 10 and a third stirrer 11 which are connected with the stirring motor 12;
the first stirrer 9 is located below the first heating pipeline 4, the second stirrer 10 is located between the first heating pipeline 4 and the second heating pipeline 5, and the third stirrer 11 is located above the second heating pipeline 5.
Preferably, when the volume of the oil sample to be treated in the reaction tank is smaller than a first preset volume, the first heating pipeline valve 1 is opened, so that a heat source is filled in the first heating pipeline 4, and only the lower part in the tank body is heated;
when the volume of the oil sample to be treated in the reaction tank exceeds a second preset volume, the first heating pipeline valve 1 and the second heating pipeline valve 2 are simultaneously opened, so that a heat source is filled in the first heating pipeline 4 and the second heating pipeline 5, and the oil sample is simultaneously heated up and down in the tank body;
preferably, when the volume of the oil sample to be treated in the reaction tank exceeds a second preset volume, the valve 3 of the third heating pipeline is opened, so that a heat source is filled in the third heating pipeline 6, and the oil sample is heated up and down outside the tank body simultaneously;
or, when the volume of the oil sample to be processed in the reaction tank exceeds the second preset volume, the first heating pipeline valve 1, the second heating pipeline valve 2 and the third heating pipeline valve 3 are simultaneously opened, so that the heat source is full of the first heating pipeline 4, the second heating pipeline 5 and the third heating pipeline 6, and the oil sample is simultaneously heated up and down in the tank body.
Preferably, the heat source in the n heating pipelines is steam or heat conducting oil.
The utility model has the advantages that:
the utility model provides an among the retort, a plurality of heated tube way have set gradually according to upper and lower order in the retort, are corresponding to different oil appearance volumes respectively, and each heated tube way is by the entering of the valve control heat source that corresponds, can select to open different valves according to the quality or the volume of pending oil appearance in the retort when consequently using, and then select the best heating methods. The device can carry out multistage heating control, and the flexible operation, reaction are abundant, can effectively improve work efficiency, energy saving consumption, extension heating pipeline's life-span.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic structural diagram of a multi-stage heating oil ester refining reaction tank according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an internal heating pipeline according to an embodiment of the present invention;
wherein the reference numbers are as follows:
the device comprises a first heating pipeline valve 1, a second heating pipeline valve 2, a third heating pipeline valve 3, a first heating pipeline 4, a second heating pipeline 5, a third heating pipeline 6, a heat source inlet 7, a heat source outlet 8, a first stirrer 9, a second stirrer 10, a third stirrer 11, a stirring motor 12, a first feeding hole 13, a second feeding hole 14 and a discharging hole 15; an input conduit 401, an output conduit 402, an upper annular conduit 403, a lower annular conduit 404, and a plurality of column conduits 405.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The present invention will be described in detail with reference to the accompanying drawings and examples.
The embodiment of the utility model provides a multistage heating oil ester refining retort, as shown in figure 1, including heat source inlet 7, heat source outlet 8 and n heating pipes, heat source inlet 7 is located retort lower part, heat source outlet 8 is located retort upper portion;
the n heating pipelines comprise n-1 inner heating pipelines and 1 outer heating pipeline, and the n-1 inner heating pipelines are sequentially arranged inside the tank body of the reaction tank from bottom to top or from top to bottom, and further respectively correspond to different volumes in the reaction tank; the outer heating pipeline is arranged around the double-layer gap of the outer wall of the reaction tank; wherein n is more than or equal to 3;
valves are respectively arranged between the inlets of the n heating pipelines and the heat source inlet 7, so that the heat source is controlled to enter the corresponding heating pipelines through the corresponding valves; and outlets of the n heating pipelines are respectively connected with the heat source outlet 8.
The heat source in the n heating pipelines is steam or heat conducting oil, and is not limited herein.
When the reaction tank is used for oil sample treatment, the larger the volume of an oil sample to be treated is, the more valves need to be opened, and the valves corresponding to the inner heating pipelines at the lowest positions are preferentially opened, so that the inner heating pipelines at the lowest positions begin to be heated firstly; with the increase of the volume of the oil sample to be treated, the valves corresponding to the inner heating pipelines can be sequentially opened from bottom to top, so that the number of the inner heating pipelines in a heating state is gradually increased from bottom to top; when the volume of the oil sample to be treated reaches a certain larger preset value, the corresponding valves of the external heating pipelines can be simultaneously opened, so that the internal part of the tank body is heated, and the external layer of the tank body is also synchronously heated.
The embodiment of the utility model provides an among the above-mentioned retort, a plurality of heating tube have set gradually according to upper and lower order in the retort, are corresponding to different oil appearance volumes respectively, and each heating tube is by the entering of the valve control heat source that corresponds, can select to open different valves according to the quality or the volume of pending oil appearance in the retort when consequently using, and then select the best heating methods. The device can carry out multistage heating control, and the flexible operation, reaction are abundant, can effectively improve work efficiency, energy saving consumption, extension heating pipeline's life-span.
Further, in order to ensure that the internal heating pipeline can uniformly and comprehensively heat the oil sample in the tank, the internal heating pipeline may be designed as shown in fig. 2, and is formed by connecting an input pipeline 401, an output pipeline 402, an upper circular pipeline 403, a lower circular pipeline 404 and a plurality of upright pipelines 405 in a through manner. The input pipeline 401 is connected with the lower circular pipeline 404, and the output pipeline 402 is connected with the upper circular pipeline 403; the upper circular pipe 403 and the lower circular pipe 404 are coaxially arranged up and down, and the plurality of upright pipes 405 are longitudinally arranged between the upper circular pipe and the lower circular pipe. Therefore, after the heat source enters from the input pipe 401, the lower circular pipe 404, the plurality of column pipes 405 and the upper circular pipe 403 can be filled, and finally, the heat source is output from the output pipe 402. Wherein the outer diameters of the upper circular pipe 403 and the lower circular pipe 404 can be coupled with the inner diameter of the reaction tank.
With continued reference to FIG. 1, a complete retort apparatus typically further comprises a stirring motor 12 and n stirrers connected to the stirring motor 12; wherein, agitator motor 12 sets up in the retort outside, n a stirrer sets gradually in the internal portion of jar of retort according to from the bottom up or from the top down order for stir jar interior liquid, make the reaction more even, abundant. Each agitator comprises one or more blades; among the n stirrers, the stirrer blade positioned at the lowest position is V-shaped so as to be coupled with the shape of the bottom of the reaction tank, and the blades of the other stirrers are all linear. Further, the complete reaction tank equipment also comprises a first feeding hole 13, a second feeding hole 14 and a discharging hole 15, wherein the first feeding hole 13 and the second feeding hole 14 are positioned at the top of the reaction tank, and the discharging hole 15 is positioned at the bottom of the reaction tank; wherein, the first feed inlet 13 can be used for inputting an oil sample to be treated, and the second feed inlet 14 can be used for inputting lye or soft water.
With further reference to fig. 1, in a specific embodiment, assuming that n is 3, the heating conduits include a first heating conduit 4, a second heating conduit 5, and a third heating conduit 6; the first heating pipeline 4 and the second heating pipeline 5 are internal heating pipelines, the first heating pipeline 4 is arranged at the lower half part in the reaction tank, and the second heating pipeline 5 is arranged at the upper half part in the reaction tank; the third heating pipeline 6 is an outer heating pipeline and is arranged around the double-layer gap of the outer wall of the reaction tank. The first heating pipeline 4 and the second heating pipeline 5 have the same pipeline structure, and are formed by connecting an input pipeline 401, an output pipeline 402, an upper circular pipeline 403, a lower circular pipeline 404 and a plurality of upright pipelines 405 in a penetrating manner, as shown in fig. 2.
The heat source inlet 7 is located at the lower part of the reaction tank, the first heating pipeline 4 is connected with the heat source inlet 7 through a first heating pipeline valve 1, the second heating pipeline 5 is connected with the heat source inlet 7 through a second heating pipeline valve 2, and the third heating pipeline 6 is connected with the heat source inlet 7 through a third heating pipeline valve 3 so as to control the heat source to enter from the corresponding valves respectively. The heat source outlet 8 is located at the upper part of the reaction tank, and outlets (i.e. the corresponding output pipelines 402) of the first heating pipeline 4, the second heating pipeline 5 and the third heating pipeline 6 are respectively connected with the heat source outlet 8.
Correspondingly, the number of the stirrers is also 3, namely a first stirrer 9, a second stirrer 10 and a third stirrer 11, which are respectively connected with the stirring motor 12. The first stirrer 9 is positioned below the first heating pipeline 4, the second stirrer 10 is positioned between the first heating pipeline 4 and the second heating pipeline 5, and the third stirrer 11 is positioned above the second heating pipeline 5, so that the liquid in the tank body is stirred in the upper layer, the middle layer and the lower layer. Wherein the blades of said first stirrer 9 of the bottom layer are V-shaped so as to be coupled with the shape of the bottom of the reaction tank, and the blades of said second stirrer 10 and said third stirrer 11 are linear.
Based on the above reaction tank structure, when the volume of the oil sample to be processed in the reaction tank is smaller than a first preset volume (for example, the volume of the oil sample to be processed is less than half of the tank body) during the alkali refining or water washing of the natural ester, the valve 1 of the first heating pipeline can be only opened, so that the first heating pipeline 4 is filled with a heat source (steam or heat conducting oil), and only the lower part in the tank body is heated. Wherein, the oil sample to be treated can be added from the first feed inlet 13, the alkali liquor or the soft water can be added from the second feed inlet 14, the heat and different liquids are uniformly mixed by the stirrer, and the reaction is complete.
When the volume of the oil sample to be processed in the reaction tank exceeds a second preset volume (for example, the volume of the oil sample to be processed exceeds the tank 2/3), the first heating pipeline valve 1 and the second heating pipeline valve 2 can be opened simultaneously, so that the first heating pipeline 4 and the second heating pipeline 5 are filled with a heat source, and thereby the simultaneous heating up and down in the tank body is realized. Wherein, the oil sample to be treated can be added from the first feed inlet 13, the alkali liquor or the soft water can be added from the second feed inlet 14, the heat and different liquids are uniformly mixed by the stirrer, and the reaction is complete.
When the volume of the oil sample to be treated in the reaction tank exceeds a second preset volume (for example, the volume of the oil sample to be treated exceeds the tank 2/3), the third heating pipeline valve 3 can be opened only, so that the third heating pipeline 6 is filled with the heat source, and the simultaneous heating up and down on the outer layer of the tank body is realized. Wherein, the oil sample to be treated can be added from the first feed inlet 13, the alkali liquor or the soft water can be added from the second feed inlet 14, the heat and different liquids are uniformly mixed by the stirrer, and the reaction is complete.
When the volume of the oil sample to be processed in the reaction tank exceeds a second preset volume (for example, the volume of the oil sample to be processed exceeds the tank 2/3), and the processing temperature requirement is high, in order to shorten the time for reaching the target heating temperature, the first heating pipeline valve 1, the second heating pipeline valve 2 and the third heating pipeline valve 3 can be simultaneously opened, so that the first heating pipeline 4, the second heating pipeline 5 and the third heating pipeline 6 are filled with a heat source, and the inside and the outside of the tank can be simultaneously heated up and down. Wherein, the oil sample to be treated can be added from the first feed inlet 13, the alkali liquor or the soft water can be added from the second feed inlet 14, the heat and different liquids are uniformly mixed by the stirrer, and the reaction is complete.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The multi-section heating oil ester refining reaction tank is characterized by comprising a heat source inlet (7), a heat source outlet (8) and n heating pipelines, wherein the heat source inlet (7) is positioned at the lower part of the reaction tank, and the heat source outlet (8) is positioned at the upper part of the reaction tank;
the n heating pipelines comprise n-1 inner heating pipelines and 1 outer heating pipeline, the n-1 inner heating pipelines are sequentially arranged inside the tank body of the reaction tank from bottom to top or from top to bottom, and the outer heating pipelines are arranged around the double-layer gap of the outer wall of the reaction tank; wherein n is more than or equal to 3;
valves are respectively arranged between the inlets of the n heating pipelines and the heat source inlet (7) so as to control the heat source to enter the corresponding heating pipelines; the outlets of the n heating pipelines are respectively connected with the heat source outlet (8).
2. The multi-stage heating oil ester refining reaction tank of claim 1, wherein the internal heating pipeline is formed by connecting an input pipeline (401), an output pipeline (402), an upper circular pipeline (403), a lower circular pipeline (404) and a plurality of upright pipelines (405) in a penetrating way;
wherein the input pipeline (401) is connected with the lower circular pipeline (404), and the output pipeline (402) is connected with the upper circular pipeline (403); the upper circular pipeline (403) and the lower circular pipeline (404) are coaxially arranged up and down, and the plurality of upright column pipelines (405) are longitudinally arranged between the upper circular pipeline and the lower circular pipeline.
3. The multi-stage heated oil ester refinery reaction tank of claim 1, further comprising a stirring motor (12) and n stirrers connected to the stirring motor (12);
wherein, agitator motor (12) set up outside the retort, n agitator sets gradually in the internal portion of jar of retort according to from the bottom up or from the top down order.
4. The multi-stage heated oil ester refinery retort of claim 3, wherein each agitator comprises one or more blades; in the n stirrers, the blade of the stirrer at the lowest position is V-shaped, and the blades of the rest stirrers are all linear.
5. A multi-stage heated oil ester refining reactor according to claim 1, further comprising a first inlet (13), a second inlet (14) and an outlet (15), wherein the first inlet (13) and the second inlet (14) are located at the top of the reactor, and the outlet (15) is located at the bottom of the reactor;
wherein, the first feed inlet (13) is used for inputting an oil sample to be treated, and the second feed inlet (14) is used for inputting alkali liquor or soft water.
6. A multi-stage heated oil ester refining retort as claimed in claim 1, characterized in that when n-3, the heating conduits comprise a first heating conduit (4), a second heating conduit (5) and a third heating conduit (6);
the first heating pipeline (4) and the second heating pipeline (5) are internal heating pipelines, the first heating pipeline (4) is arranged at the lower half part in the reaction tank, and the second heating pipeline (5) is arranged at the upper half part in the reaction tank; the third heating pipeline (6) is an external heating pipeline and is arranged around the double-layer gap of the outer wall of the reaction tank;
the first heating pipeline (4) is connected with the heat source inlet (7) through a first heating pipeline valve (1), the second heating pipeline (5) is connected with the heat source inlet (7) through a second heating pipeline valve (2), and the third heating pipeline (6) is connected with the heat source inlet (7) through a third heating pipeline valve (3).
7. The multi-stage heated oil ester refinery reaction tank of claim 6, further comprising a stirring motor (12), and a first stirrer (9), a second stirrer (10) and a third stirrer (11) connected to the stirring motor (12);
the first stirrer (9) is located below the first heating pipeline (4), the second stirrer (10) is located between the first heating pipeline (4) and the second heating pipeline (5), and the third stirrer (11) is located above the second heating pipeline (5).
8. A multi-stage heated oil ester refining reactor tank as claimed in claim 6, wherein when the volume of the oil sample to be treated in the reactor tank is less than a first preset volume, the first heating pipe valve (1) is opened to fill the first heating pipe (4) with a heat source and heat only in the lower part of the tank body;
when the volume of the oil sample to be processed in the reaction tank exceeds the second preset volume, the first heating pipeline valve (1) and the second heating pipeline valve (2) are simultaneously opened, so that a heat source is filled in the first heating pipeline (4) and the second heating pipeline (5), and the oil sample is simultaneously heated up and down in the tank body.
9. A multi-stage heated oil ester refining reaction tank as claimed in claim 6, wherein when the volume of the oil sample to be treated in the reaction tank exceeds a second preset volume, the third heating pipeline valve (3) is opened to fill the third heating pipeline (6) with the heat source, and the oil ester refining reaction tank is heated up and down outside the tank body simultaneously;
or, when the volume of the oil sample to be processed in the reaction tank exceeds the second preset volume, the first heating pipeline valve (1), the second heating pipeline valve (2) and the third heating pipeline valve (3) are simultaneously opened, so that the heat source is full of the first heating pipeline (4), the second heating pipeline (5) and the third heating pipeline (6), and the oil sample is simultaneously heated up and down in the tank body.
10. The multi-stage heated oil ester refining reactor according to any one of claims 1 to 9, wherein the heat source in the n heating pipes is steam or heat conducting oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921487994.9U CN210826106U (en) | 2019-09-09 | 2019-09-09 | Oil ester refining retort of multistage heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921487994.9U CN210826106U (en) | 2019-09-09 | 2019-09-09 | Oil ester refining retort of multistage heating |
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| Publication Number | Publication Date |
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| CN210826106U true CN210826106U (en) | 2020-06-23 |
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| CN201921487994.9U Active CN210826106U (en) | 2019-09-09 | 2019-09-09 | Oil ester refining retort of multistage heating |
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- 2019-09-09 CN CN201921487994.9U patent/CN210826106U/en active Active
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Denomination of utility model: A multi-stage heating oil ester refining reaction tank Effective date of registration: 20220224 Granted publication date: 20200623 Pledgee: Wuhan area branch of Hubei pilot free trade zone of Bank of China Ltd. Pledgor: WUHAN ZEDIAN NEW MATERIAL CO.,LTD. Registration number: Y2022420000045 |
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