CN212722175U - Reboiling device convenient for sampling - Google Patents
Reboiling device convenient for sampling Download PDFInfo
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- CN212722175U CN212722175U CN202021563462.1U CN202021563462U CN212722175U CN 212722175 U CN212722175 U CN 212722175U CN 202021563462 U CN202021563462 U CN 202021563462U CN 212722175 U CN212722175 U CN 212722175U
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- reboiler
- sampling
- valve
- stainless steel
- downstream
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- 238000005070 sampling Methods 0.000 title claims abstract description 53
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 15
- 239000010935 stainless steel Substances 0.000 claims abstract description 15
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 13
- 230000000007 visual effect Effects 0.000 claims abstract description 12
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 16
- 239000000463 material Substances 0.000 description 15
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 8
- 238000001514 detection method Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000007818 Grignard reagent Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 150000004795 grignard reagents Chemical class 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000282326 Felis catus Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
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- Sampling And Sample Adjustment (AREA)
Abstract
本申请涉及一种便于取样的再沸装置，其特征在于，包括：(i)再沸器；(ii)在该再沸器底部外依次设置的第一阀门、视盅、不锈钢管和第二阀门；(iii)循环泵，该循环泵的入口通过上游循环管路与所述不锈钢管连接、出口通过下游循环管路与所述再沸器顶部连接；以及(iv)取样管，该取样管突出设置在下游循环管路上接近该循环管路与再沸器顶部的连接口的位置。
The present application relates to a reboiler device that facilitates sampling, which is characterized by comprising: (i) a reboiler; (ii) a first valve, a visual cup, a stainless steel pipe and a second valve, which are sequentially arranged outside the bottom of the reboiler. valve; (iii) a circulation pump, the inlet of which is connected to the stainless steel pipe through an upstream circulation line, and the outlet is connected to the top of the reboiler through a downstream circulation line; and (iv) a sampling pipe, the sampling pipe The protrusion is arranged on the downstream circulation line at a position close to the connection port between the circulation line and the top of the reboiler.
Description
Technical Field
The present application relates to a reboiling device that facilitates sampling.
Background
Tetrahydrofuran is a common solvent for preparing the grignard reagent, and because the grignard reagent is not sensitive to water, the moisture content of the tetrahydrofuran is strictly controlled, and the moisture content is generally controlled within 0.05%. In the production of tetrahydrofuran, the economic cost is considered to be usually rectified and recycled, and after rectification is finished, sampling is needed before discharging to detect whether the moisture of the tetrahydrofuran reaches the standard or not.
The conventional sampling operation of the reboiler of the rectifying tower is to sample from a valve under a visual cup at the bottom of the reboiler of the rectifying tower, but the bottom of the reboiler is as high as about 3m away from the ground, so that the reboiler needs to climb a staircase to sample, and the operation is inconvenient and potential safety hazards exist; in addition, when the material is discharged from a valve below a viewing cup at the bottom of the reboiler, the material can contact with air in a large area, the temperature of the material in the reboiler of the rectifying tower is up to 70 ℃, and the moisture in the air is easily absorbed by tetrahydrofuran, so that the detection result is greatly influenced; further, need the blowing 3 times before the sample to wash the pipeline between the cauldron bottom and the sample connection, avoid last batch material to remain and influence the detection in the pipeline, complex operation not only like this, 3 times of the material of discharging has caused the waste in order to wash the pipeline moreover.
SUMMERY OF THE UTILITY MODEL
It is an object of the present application to provide a reboiling apparatus that facilitates sampling. The device has an improved sampling system, and can well solve the problems of potential safety hazards caused by inconvenient sampling operation, potential quality hazards caused by influence of factors such as external air or moisture on detection results and material waste.
In particular, the present application relates to:
(1) reboiling apparatus for facilitating sampling, comprising:
(i) a reboiler;
(ii) the reboiler is characterized in that a first valve, a visual cup, a stainless steel pipe and a second valve are sequentially arranged outside the bottom of the reboiler;
(iii) the inlet of the circulating pump is connected with the stainless steel pipe through an upstream circulating pipeline, and the outlet of the circulating pump is connected with the top of the reboiler through a downstream circulating pipeline; and
(iv) and the sampling pipe is arranged on the downstream circulating pipeline in a protruding way and is close to the connecting port of the circulating pipeline and the top of the reboiler.
(2) The reboiling apparatus of (1) above, wherein the sampling tube is a 90 degree arc bend.
(3) The reboiling device described in the above (1) or (2), wherein the length of the vertical part of the sampling tube is 4 to 10cm, preferably about 5 to 8 cm.
(4) The reboiling device as described in any one of (1) to (3) above, wherein the sampling tube has a tube diameter of 1 to 2cm, preferably about 1 cm.
(5) The reboiling apparatus as claimed in any one of (1) to (4) above, wherein the upstream and downstream circulation lines and the sampling pipe are both made of stainless steel.
(6) The reboiling device according to any one of (1) to (5) above, which is used in rectification of tetrahydrofuran.
Drawings
FIG. 1 is a schematic diagram of one of the preferred embodiments of the reboiling apparatus for facilitating sampling according to the present application.
FIG. 2 is a schematic structural view of a preferred embodiment of the sampling tube.
Description of reference numerals:
1: a reboiler;
2: a first valve;
3: a visual cup;
4: a stainless steel tube;
5: a second valve;
6: an upstream circulation line;
7: a circulation pump;
8: a downstream circulation line;
9: a sampling tube;
10: a connecting port of the circulating pipeline and the top of the reboiler;
11: the vertical portion of the sampling tube.
Detailed Description
The structure of the reboiling device of the present application will be described in more detail with reference to the accompanying drawings, but the present application is not limited to the specific embodiment, and any modification and change that do not depart from the gist of the present application fall within the scope of the present application.
As shown in fig. 1, the reboiling apparatus of the present application includes a reboiler 1, a first valve 2, a sight cup 3, a stainless steel pipe 4, a second valve 5, an upstream circulation line 6, a circulation pump 7, a downstream circulation line 8, and a sampling pipe 9.
The reboiler 1 may have a known structure, and is not particularly limited.
The bottom of the reboiler 1 is externally provided with a first valve 2, a visual cup 3, a stainless steel tube 4 and a second valve 5 from top to bottom in sequence.
The reboiler has the sampling system now to be composed of first valve 2, visual cup 3 and second valve 5, implements static sample, namely, opens first valve 2 blowing to visual cup 3, then closes first valve 2, opens second valve 5 and emits the sample in visual cup 3. In such a static sampling method, the composition of the material in the whole reboiler may not be uniform, and the sample discharged from the bottom of the reboiler cannot represent the composition of the whole material, thereby affecting the accuracy of the detection result. In addition, as the pipeline in the industrial production is thick, the amount of the sample put into the visual cup 3 each time at least needs to reach 2kg, so that the observation and the operation are convenient, and the material consumption is high.
One of the main characteristics of the application lies in that a stainless steel pipe 4 is arranged between the visual cup 3 and the second valve 5, a circulating pipeline is led out from the stainless steel pipe 4 and connected with a circulating pump 7, before sampling, the circulating pump 7 is started to make the materials dynamically circulate for a certain time, preferably 10-20 minutes, more preferably 15-20 minutes, and then discharging is carried out, so that the sample obtained by dynamic sampling is more uniform in composition than the sample obtained by the existing static sampling, and the measuring result is more accurate.
The circulating pipeline comprises an upstream section and a downstream section, the upstream section is arranged between the stainless steel pipe 4 and the circulating pump 7, the downstream section is arranged between the circulating pump 7 and a connecting port 10 at the top of the circulating pipeline and the reboiler, and the upstream section and the downstream section are respectively called an upstream circulating pipeline 6 and a downstream circulating pipeline 8. The length ratio of the two stages is not particularly limited, but the upstream stage is generally shorter than the downstream stage in view of the tube resistance.
Another essential feature of the present application is that a sampling tube 9 is provided in the downstream circulation line 8. The sampling tube 9 is placed close to the connection 10 of the circulation line to the top of the reboiler. The reboiler 1 is typically erected at a height, typically about 3 meters from the ground at the bottom, and typically slightly above the platform for human walking operation at the top. Compare with the mode that need the cat ladder to ascend a height just can take a sample in the past, this application through circulating pump 7 with the material pump to reboiler top, the people can stand and take a sample on the platform, has improved sample convenience and security greatly.
As mentioned above, the sampling and detection of tetrahydrofuran requires that the sample be prevented from contacting air and water as much as possible to ensure the accuracy of the result. In the present application, the sampling tube 9 preferably uses a 90 degree arc elbow as shown in FIG. 2. The vertical portion 11 of the sampling tube 9 preferably has a length, preferably a length of 4 to 10cm, more preferably about 5 to 8 cm. The vertical part 11 is extended into the bottom of the sampling bottle during sampling, so that the contact of the sample and air can be better reduced. Further, the sampling tube 9 preferably has a small tube diameter, more preferably the tube diameter is 1-2 cm, and further preferably about 1 cm. Such a small diameter allows the use of a small bore sampling vial, and also helps to reduce the contact of the sample with air in the vial.
The sampling quantity can be reduced to about 10ml by arranging the sampling tube 9, and compared with the prior art that at least 2kg of materials need to be discharged every time when the samples are taken through the visual cup 3, the sampling quantity is greatly reduced, so that the material waste is reduced.
The circulating pump 7 is started immediately after sampling, the material in the reboiler 1 can be circulated to form uniform components after running for 10-20 minutes, preferably about 15-20 minutes, and sampling can be started at the moment. And after sampling, the circulating pump 7 is closed.
Preferably, the upstream circulation line 6, the downstream circulation line 8 and the sampling tube 9 are made of stainless steel.
The reboiling device of the present application is particularly preferably used in the rectification of tetrahydrofuran, but is not limited thereto, and can also be widely used in the rectification of solvents with similar problems.
Industrial applicability
It is an object of the present application to provide a reboiling apparatus that facilitates sampling. The device has the modified sampling system, can solve the inconvenient potential safety hazard that brings of sampling operation, the quality hidden danger and the extravagant problem of material that factors such as outside air or moisture influence the testing result and bring well.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021563462.1U CN212722175U (en) | 2020-07-31 | 2020-07-31 | Reboiling device convenient for sampling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021563462.1U CN212722175U (en) | 2020-07-31 | 2020-07-31 | Reboiling device convenient for sampling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212722175U true CN212722175U (en) | 2021-03-16 |
Family
ID=74911463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021563462.1U Active CN212722175U (en) | 2020-07-31 | 2020-07-31 | Reboiling device convenient for sampling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212722175U (en) |
-
2020
- 2020-07-31 CN CN202021563462.1U patent/CN212722175U/en active Active
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| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 061100 east side of South jingsan Road, chemical Avenue, Lingang Development Zone, Cangzhou City, Hebei Province Patentee after: Hebei lanrun Plant Protection Technology Co.,Ltd. Country or region after: China Patentee after: Hebei Chengxi Technology Co.,Ltd. Address before: 061100 east side of South jingsan Road, chemical Avenue, Lingang Development Zone, Cangzhou City, Hebei Province Patentee before: Hebei lanrun Plant Protection Technology Co.,Ltd. Country or region before: China Patentee before: Hebei Jiacheng Chemical Co.,Ltd. |