CN211784486U - Sampling device of dimethyl oxalate - Google Patents
Sampling device of dimethyl oxalate Download PDFInfo
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- CN211784486U CN211784486U CN201922428386.7U CN201922428386U CN211784486U CN 211784486 U CN211784486 U CN 211784486U CN 201922428386 U CN201922428386 U CN 201922428386U CN 211784486 U CN211784486 U CN 211784486U
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Abstract
The utility model provides a sampling device of dimethyl oxalate, which comprises a sampling bottle, a sampling tube, a recovery bottle and a heating mechanism, wherein the heating mechanism comprises a heater, a liquid outlet tube and a liquid return tube, the liquid outlet tube is provided with a first liquid outlet end and a second liquid outlet end, the first liquid outlet end is connected with the sampling bottle through the sampling tube, the sampling tube is sequentially provided with a first valve, a first three-way valve and a second three-way valve, the valve port of the first three-way valve, which is far away from the sampling tube, is connected with a production line pipeline through the sample inlet tube, the valve port of the second three-way valve, which is far away from the sampling tube, is connected with the recovery bottle through the recovery tube, the two ends of the heat exchange tube are respectively connected with the heater and the second liquid outlet end, the heat exchange tube is arranged close to the sampling tube, the second valve is arranged on the heat exchange tube, the recovery bottle is used for containing the heat exchange liquid dissolved with the dimethyl oxalate, so that the problems of dimethyl oxalate waste and influence on human health are avoided.
Description
Technical Field
The utility model relates to a chemical industry equipment technical field, concretely relates to dimethyl oxalate's sampling device.
Background
At present, sampling detection needs to be carried out at fixed points on pipelines of an enterprise dimethyl oxalate production line, a sampler in the prior art is arranged near a detection point of the pipeline of the production line and is connected with the pipeline of the production line through a connecting pipe, but because the melting point of dimethyl oxalate is 54 ℃, namely the dimethyl oxalate is solid at normal temperature, a heating mechanism is needed to heat the sampling pipe.
The patent application No. 201821587294.2, china utility model discloses a sampling device of dimethyl oxalate, it can melt the replacement to the solid-state dimethyl oxalate that leaves over in the connecting pipe before the sample, guarantee the unobstructed of sampling tube, adopt steam heat tracing pipeline to ensure the temperature of sampling tube to keep above the dimethyl oxalate melting point in the sampling process, avoid the condition that the temperature drops below the melting point in the sampling tube, utilize the compressed air after the sample finishes to replace the sampling tube, avoid remaining dimethyl oxalate to block up the sampling tube, it adopts compressed air to replace dimethyl oxalate, because dimethyl oxalate and air can not dissolve each other, therefore adopt compressed air can not clear away the interior remaining dimethyl oxalate of sampling tube totally, can bring harmful effects for subsequent detection, secondly, the compressed air mixed with dimethyl oxalate directly discharges into the environment chance and leads to the waste of dimethyl oxalate, in addition, dimethyl oxalate is irritating to eyes and skin of a human body, and causes discomfort when directly discharged into the environment.
SUMMERY OF THE UTILITY MODEL
The utility model provides a dimethyl oxalate sampling device to solve the above-mentioned technical problem that sampling device exists among the prior art.
The utility model provides a scheme as follows of above-mentioned technical problem: a sampling device for dimethyl oxalate comprises a sampling bottle, a sampling tube, a recovery bottle and a heating mechanism, wherein the heating mechanism comprises a heater, a liquid outlet tube and a liquid return tube, the heater is used for heating heat exchange liquid and then sending out the heat exchange liquid from the liquid outlet tube, the liquid outlet tube is provided with a first liquid outlet end and a second liquid outlet end, the first liquid outlet end is connected with the sampling bottle through the sampling tube, a first valve, a first three-way valve and a second three-way valve are sequentially arranged on the sampling tube, a valve port of the first three-way valve, which is far away from the sampling tube, is connected with a production line pipeline through a sample inlet tube, a valve port of the second three-way valve, which is far away from the sampling tube, is connected with the recovery bottle through a recovery tube, two ends of a heat exchange tube are respectively connected with the heater and the second liquid outlet end and are used for backflow circulation of the heat, the sampling tube is used for heating, the heat exchange tube is provided with a second valve, and dimethyl oxalate can be dissolved in the heat exchange liquid.
The utility model provides a sampling device, when the sampling operation, close first valve, open the second valve, adjust the first three-way valve and make sample tube and sampling tube communicate, adjust the second three-way valve and make sampling tube and sampling bottle communicate, liquid dimethyl oxalate from the production pipeline through the sample tube gets into the sampling tube, the heat transfer liquid after being heated by the heat exchanger gets into in the heat transfer tube, heats the dimethyl oxalate in the sampling tube, ensures that dimethyl oxalate can not solidify, contains the dimethyl oxalate who takes out with the sampling bottle; after the sample is accomplished, open first valve, close the second valve, adjust first three-way valve and make sampling tube and sampling tube disconnection, adjustment second three-way valve makes sampling tube and recovery tube intercommunication, and in heat transfer liquid got into the sampling tube, the dimethyl oxalate that dissolves on the sampling tube pipe wall dissolved, dissolved dimethyl oxalate's heat transfer liquid got into in the recovery bottle for use, the utility model discloses a can dissolve dimethyl oxalate's heat transfer liquid and can clear away the interior remaining dimethyl oxalate of sampling tube totally, dissolve dimethyl oxalate's heat transfer liquid with the recovery bottle splendid attire simultaneously, avoided taking place that dimethyl oxalate is extravagant and influence the problem of health.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
fig. 1 is a schematic structural diagram of a sampling device for dimethyl oxalate according to an embodiment of the present invention.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.
As shown in figure 1, the utility model provides a sampling device of dimethyl oxalate, including sampling bottle 1, sampling tube 2, recovery bottle 3, heating mechanism 4, sample inlet pipe 5, sample return pipe 6 and recovery tube 7.
The heating mechanism 4 comprises a heater 41, a liquid outlet pipe 42, a heat exchange pipe 43 and a liquid inlet pipe 44, wherein the heater 41 is used for heating the heat exchange liquid and then sending the heat exchange liquid out from the liquid outlet pipe 42.
Wherein, the liquid outlet pipe 42 has a first liquid outlet end 421 and a second liquid outlet end 422, the first liquid outlet end 421 is connected with the sampling bottle 1 through the sampling pipe 2, the sampling pipe 2 is sequentially provided with a first valve 21, a first three-way valve 22 and a second three-way valve 23, a valve port of the first three-way valve 22 far away from the sampling pipe 2 is connected with a production line pipeline (not shown in the figure) through a sample inlet pipe 5, a valve port of the second three-way valve 22 far away from the sampling pipe 2 is connected with the recovery bottle 3 through a recovery pipe 7, two ends of the heat exchange pipe 43 are respectively connected with the heater 41 and the second liquid outlet end 422 for the reflux circulation of the heat exchange liquid, the heat exchange pipe 43 is arranged close to the sampling pipe 2 and used for heating the sampling pipe 2, the heat exchange,
preferably, the sampling pipe 2 is further provided with a third three-way valve 24, the third three-way valve 24 is arranged between the first three-way valve 22 and the second three-way valve 23, and a valve port of the third three-way valve 24, which is far away from the sampling pipe 2, is communicated with the production line pipeline through a return pipe 6.
In the embodiment of the present invention, the dimethyl oxalate is dissolved in the heat exchange liquid, preferably, the heat exchange liquid is an alcohol solution.
The liquid inlet pipe 44 is used for adding heat exchange liquid into the heater 41, the third valve 441 is installed on the liquid inlet pipe, and when the heat exchange liquid needs to be added into the heater 41, the third valve 441 is opened, and the heat exchange liquid flows into the heater 41 through the liquid inlet pipe 44.
It should be noted that, in the embodiment of the present invention, the three-way valve refers to a valve having an inlet and two outlets, and when the valve core is rotated, three ports of the valve are opened when any one of the three ports is closed, and the other two ports are communicated with each other.
The present embodiment is divided into three stages in use:
1. before sampling, adjusting a first three-way valve 22 to enable a sampling pipe 5 to be communicated with a sampling pipe 2, adjusting a third three-way valve 24 to enable the sampling pipe 2 to be communicated with a sample return pipe 6, keeping a second three-way valve 23 closed, and replacing dimethyl oxalate remaining in the sampling pipe 2 after last sampling by sequentially passing the dimethyl oxalate in a production line pipeline through the sampling pipe 5, the sampling pipe 2 and the sample return pipe 6;
2. then, the sampling operation is carried out, the first valve 21 is kept closed, the second valve 431 is opened, the second three-way valve 23 is adjusted to enable the sampling tube 2 to be communicated with the sampling bottle 1, liquid dimethyl oxalate enters the sampling tube 2 from the production line pipeline through the sampling tube 5, meanwhile, heat exchange liquid heated by the heat exchanger 41 enters the heat exchange tube 43 to heat the dimethyl oxalate in the sampling tube 2, the dimethyl oxalate is ensured not to be solidified, and the sampling bottle 2 is used for containing the dimethyl oxalate to finish the sampling.
3. After sampling, the first valve 21 is opened, the second valve 431 is closed, the first three-way valve is adjusted to disconnect the sampling pipe 5 and the sampling pipe 2, the second three-way valve 23 is adjusted to connect the sampling pipe 2 and the recovery pipe 7, the heat exchange liquid enters the sampling pipe 2, dimethyl oxalate on the pipe wall of the sampling pipe 2 is dissolved, and the heat exchange liquid with the dimethyl oxalate dissolved therein enters the recovery bottle 3 for standby.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; the present invention can be smoothly implemented by those skilled in the art according to the drawings and the above description; however, those skilled in the art should understand that changes, modifications and variations made by the above-described technology can be made without departing from the scope of the present invention, and all such changes, modifications and variations are equivalent embodiments of the present invention; meanwhile, any changes, modifications, evolutions, etc. of the above embodiments, which are equivalent to the actual techniques of the present invention, still belong to the protection scope of the technical solution of the present invention.
Claims (4)
1. A sampling device for dimethyl oxalate is characterized by comprising a sampling bottle, a sampling tube, a recovery bottle and a heating mechanism, wherein the heating mechanism comprises a heater, a liquid outlet tube and a heat exchange tube, the heater is used for heating heat exchange liquid and then sending out the heat exchange liquid from the liquid outlet tube, the liquid outlet tube is provided with a first liquid outlet end and a second liquid outlet end, the first liquid outlet end is connected with the sampling bottle through the sampling tube, a first valve, a first three-way valve and a second three-way valve are sequentially arranged on the sampling tube, a valve port of the first three-way valve, which is far away from the sampling tube, is connected with a production line pipeline through a sample inlet tube, a valve port of the second three-way valve, which is far away from the sampling tube, is connected with the recovery bottle through the recovery tube, two ends of the heat exchange tube are respectively connected with the heater and the second liquid outlet end and are used for backflow circulation of the heat, the sampling tube is used for heating, the heat exchange tube is provided with a second valve, and dimethyl oxalate is dissolved in the heat exchange liquid.
2. The dimethyl oxalate sampling device of claim 1, wherein the sampling tube is further provided with a third three-way valve, the third three-way valve is arranged between the first three-way valve and the second three-way valve, and a valve port of the third three-way valve, which is far away from the sampling tube, is communicated with a production line pipeline through a sample returning tube.
3. The dimethyl oxalate sampling device of claim 1, wherein the heat exchange liquid is an alcohol solution.
4. The dimethyl oxalate sampling device of claim 1, wherein the heating mechanism further comprises a liquid inlet pipe, and the liquid inlet pipe is used for adding a heat exchange liquid into the heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922428386.7U CN211784486U (en) | 2019-12-30 | 2019-12-30 | Sampling device of dimethyl oxalate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922428386.7U CN211784486U (en) | 2019-12-30 | 2019-12-30 | Sampling device of dimethyl oxalate |
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| Publication Number | Publication Date |
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| CN211784486U true CN211784486U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922428386.7U Active CN211784486U (en) | 2019-12-30 | 2019-12-30 | Sampling device of dimethyl oxalate |
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| CN (1) | CN211784486U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113029682A (en) * | 2021-01-27 | 2021-06-25 | 中船重工（邯郸）派瑞特种气体有限公司 | Device and method for hermetically sampling toxic liquid |
-
2019
- 2019-12-30 CN CN201922428386.7U patent/CN211784486U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113029682A (en) * | 2021-01-27 | 2021-06-25 | 中船重工（邯郸）派瑞特种气体有限公司 | Device and method for hermetically sampling toxic liquid |
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