Closed sampling system suitable for diethyl zinc
By designing a closed sampling system with a vacuum system and nitrogen inlet, the alternating control of multiple ball valves is used to achieve pollution-free and sample freshness during the diethyl zinc sampling process, solving the problem of ordinary closed sampling devices affecting sample accuracy.
Patent Information
- Application Number
- CN202422454932.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-10-11
AI Technical Summary
When performing sampling operations on diethyl zinc, existing ordinary sealed samplers inevitably contact air or retain the last sampled liquid in the pipeline, affecting the accuracy of the second sampled sample.
A closed sampling system including a vacuum system, a nitrogen inlet and multiple ball valves is designed to avoid contact with air or pipe residue during diethyl zinc sampling through vacuum removal and nitrogen flushing.
It effectively avoids contact with air or pipe residue during diethyl zinc sampling, improving the accuracy of secondary sampling samples.
Smart Images
Figure CN223307928U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of closed sampling, and in particular to a closed sampling system suitable for diethyl zinc. Background Art
[0002] In the existing technology, diethyl zinc has the dangerous characteristics of spontaneous combustion in air and violent reaction with water. Sampling and analysis of the reaction process or finished product are unavoidable during the production process. Ordinary closed samplers inevitably come into contact with air during the sampling process or the previous sampling liquid remains in the pipeline, affecting the accuracy of the second sampling sample. Therefore, how to design a closed sampling system that can take into account both the sampling process to avoid contamination and the freshness of the sample to prevent the residue of the previous sample. Utility Model Content
[0003] The problem to be solved by the present application is that when the existing common closed sampler is sampling diethyl zinc, it is inevitable that it will come into contact with air or the last sampled liquid will remain in the pipeline, thereby affecting the accuracy of the second sampling sample.
[0004] To solve the above technical problems, the present application provides a closed sampling system suitable for diethyl zinc, comprising a pipeline for connecting to a reactor or a container, a plurality of ball valves for opening and closing the pipeline are arranged at intervals on the upper part of the pipeline, a conical flask for sampling operations is threadedly connected to the upper part of the pipeline, one end of the pipeline is connected to a vacuum system, and the other end of the pipeline is connected to the reactor or the container, and a nitrogen inlet for blowing nitrogen is also arranged at the end of the upper part of the pipeline close to the vacuum system.
[0005] Since the closed sampling system of the present application is designed with a pipeline equipped with a vacuum system, a nitrogen inlet, a conical flask, and a ball valve, vacuum impurity removal and nitrogen flushing operations can be achieved inside the pipeline by alternately controlling the multiple ball valves, thereby preventing diethyl zinc from coming into contact with air or remaining in the upper part of the pipeline during the sampling process. This solves the problem in the conventional closed sampler of the prior art that, when sampling diethyl zinc, it is inevitable that it will come into contact with air or that liquid from the previous sampling will remain in the pipeline, thereby affecting the accuracy of the second sampling. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Figure 1 Schematic diagram of the process flow of the embodiment.
[0007] Figure 2 for Figure 1 A partial enlarged schematic diagram.
[0008] In the figure: 1. sight glass; 2. first ball valve; 3. second ball valve; 4. pressure gauge; 5. third ball valve; 6. fourth ball valve; 7. fifth ball valve; 8. conical flask. DETAILED DESCRIPTION
[0009] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application. Example
[0010] This application relates to a closed sampling system suitable for diethyl zinc, such as Figure 1-2 As shown, the closed sampling system includes a pipeline for connecting to a reactor or a container, a plurality of ball valves for opening and closing are arranged at intervals on the upper part of the pipeline, a conical flask 8 for sampling operation is threadedly connected to the upper part of the pipeline, a toluene solution is pre-added inside the conical flask 8 and weighed, diethyl zinc can be stably stored in the toluene solution and is non-hazardous, one end of the pipeline is connected to a vacuum system, and the other end of the pipeline is connected to the reactor or the container, and a nitrogen inlet for blowing nitrogen is also arranged at one end of the upper part of the pipeline near the vacuum system. In order to be able to determine whether there is gas inside the pipeline, a pressure gauge 4 for monitoring the pressure inside the pipeline is also added to the upper part of the pipeline.
[0011] There are five ball valves, which are respectively divided into the first ball valve 2, the second ball valve 3, the third ball valve 5, the fourth ball valve 6 and the fifth ball valve 7. The first ball valve 2 is arranged at the upper part of the pipe between the sight glass 1 and the pressure gauge 4, the second ball valve 3 is arranged at the upper part of the pipe between the first ball valve 2 and the conical flask 8, the third ball valve 5 is arranged at the upper part of the pipe near the pressure gauge 4, the fourth ball valve 6 is arranged at the upper part of the pipe near the vacuum system, and the fifth ball valve 7 is arranged at the upper part of the pipe near the nitrogen inlet.
[0012] The sampling method is as follows:
[0013] (1) Toluene solution is pre-added to the sampling conical flask 8 and weighed, and the conical flask 8 is connected to the pipeline through a thread;
[0014] (2) Keep the first ball valve 2 and the fifth ball valve 7 closed, and open the second ball valve 3, the third ball valve 5 and the fourth ball valve 6. Observe the pressure gauge 4 and use the vacuum system to pump the pipeline to the ultimate negative pressure state. Then close the fourth ball valve 6 and open the fifth ball valve 7 to replenish nitrogen. Repeat the replacement three times.
[0015] (3) Keep the first ball valve 2 and the fifth ball valve 7 closed again, and open the second ball valve 3, the third ball valve 5 and the fourth ball valve 6. After the pipeline is pumped to the ultimate negative pressure, close the second ball valve 3, slowly open the first ball valve 2 and observe the sight glass 1 at the same time until liquid flows into the pipeline and until there is a slight pressure on the pressure gauge 4. Close the first ball valve 2, slowly open the second ball valve 3, observe the sampling volume, collect a sufficient amount of liquid sample into the sampling bottle, and then close the second ball valve 3;
[0016] (4) Keep the first ball valve 2 and the third ball valve 5 open. After balancing the pressure, open the fifth ball valve 7 and backflush the liquid into the reactor or container. When no liquid flows into the sight glass 1, close the first ball valve 2 and the fifth ball valve 7 at the same time.
[0017] In summary, the above sampling method can effectively prevent diethyl zinc from coming into contact with air or remaining on the pipeline during the sampling process, thereby effectively improving the accuracy of the secondary sampling samples.
[0018] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" can also be understood to convey either singular or plural usage, depending at least in part on the context.
[0019] It should be readily understood that “on,” “above,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).
[0020] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be in other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.
[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A closed sampling system for diethyl zinc, comprising a pipeline for communicating with a reactor or a container, characterized in that: A plurality of ball valves for opening and closing are arranged at intervals on the upper part of the pipeline. A conical flask for sampling operation is threadedly connected to the upper part of the pipeline. One end of the pipeline is connected to the vacuum system, and the other end of the pipeline is connected to the reactor or container. A nitrogen inlet for blowing nitrogen is also arranged at the end of the upper part of the pipeline close to the vacuum system.
2. A closed sampling system suitable for diethyl zinc according to claim 1, characterized in that: A pressure gauge is also installed on the upper part of the pipeline to monitor the pressure inside the pipeline.
3. A closed sampling system suitable for diethyl zinc according to claim 2, characterized in that: There are five ball valves, which are sequentially divided into a first ball valve, a second ball valve, a third ball valve, a fourth ball valve and a fifth ball valve.
4. A closed sampling system suitable for diethyl zinc according to claim 3, characterized in that: The first ball valve is arranged at the upper part of the pipeline between the sight glass and the pressure gauge.
5. A closed sampling system suitable for diethyl zinc according to claim 4, characterized in that: The second ball valve is arranged on the upper part of the pipeline between the first ball valve and the conical flask.
6. A closed sampling system suitable for diethyl zinc according to claim 4, characterized in that: The third ball valve is arranged at the upper part of the pipeline near the pressure gauge.
7. A closed sampling system suitable for diethyl zinc according to claim 4, characterized in that: The fourth ball valve is arranged at the upper part of the pipeline close to the vacuum system.
8. A closed sampling system suitable for diethyl zinc according to claim 4, characterized in that: The fifth ball valve is arranged at a position on the upper part of the pipeline close to the nitrogen inlet.