On-line purity detection device, control device and detection method of vinyl acetate rectification products
A vinyl acetate, purity detection technology, applied in the direction of distillation adjustment/control, fractionation, phase influence characteristics measurement, etc., can solve the problems of monitoring data lag, inability to adjust, lower product qualification rate, etc., to achieve simple detection method and timely guarantee Sex, the effect of improving the product qualification rate
Inactive Publication Date: 2019-04-16
YUNNAN YUNTIANHUA
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Problems solved by technology
In the prior art, in the production process of vinyl acetate, in order to ensure that the purity of the final product can meet the standard, the quality control is generally carried out by manual sampling at regular intervals; manual sampling for detection is cumbersome to operate and the monitoring data lags behind , cannot reflect the product quality and the process conditions in the rectification tower in real time, so that the operator cannot adjust the process in time according to the final purity of the product, resulting in unqualified products flowing into the next process, which in turn makes the entire production unstable and reduces the quality of the product. Rate
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[0027] figure 1 It is a schematic diagram of the application of the control device of the present invention; figure 2 It is a structural schematic diagram of the detection device of the present invention; as shown in the figure, the on-line purity detection device for vinyl acetate rectification products of the present invention includes a liquid introduction tank 10 and a refractometer 9, and the liquid introduction tank is communicated with the vinyl acetate tower The inlet pipeline of the top product liquid storage tank 7 introduces the medium (vinyl acetate) in the inlet pipeline 8 into the liquid introduction tank 7 in real time and establishes a liquid level, and the medium flows back to the inlet pipeline by the liquid introduction tank 10 in real time; the refractometer Set in the liquid introduction tank to detect the refractive index of the medium that establishes the liquid level in the liquid introduction tank; the refractive index of vinyl acetate with different ...
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The invention discloses a vinyl acetate rectified product purity online detection device, control device and detection method; the detection device comprises a liquid guiding tank and a refractive index instrument; the liquid guiding tank communicates with an inlet pipeline of a product liquid storage tank of a vinyl acetate tower top, a medium in the inlet pipeline is real-timely guided into the liquid guiding tank, a liquid level is built, and the medium real-timely flows back to the inlet pipeline from the liquid guiding tank; the refractive index instrument is arranged in the liquid guiding tank and is used for detecting the refractive index of the medium building the liquid level in the liquid guiding tank; the online detection structure is formed, and the purity of a vinyl acetate rectified product can be real-timely detected; with use of obtained purity parameters, process parameters in a rectification tower are timely adjusted, so as to ensure the purity of final products, enable the production to be stably carried out and improve the rate of qualified products; and moreover, the detection method is simple, simple calculation and treatment are achieved with use of a computer, the detection result can be obtained, real-time detection is achieved, and the timeliness of product quality control is ensured.
Description
technical field [0001] The invention relates to a detection device for rectification products of vinyl acetate, a control device and a detection method using the detection device. Background technique [0002] Vinyl acetate is one of the more commonly used chemical raw materials. At present, industrial production mainly adopts acetylene gas phase method and ethylene gas phase method. To obtain refined vinyl acetate raw materials, it is necessary to use a rectification tower for separation and purification. During the rectification process Among them, the purity of vinyl acetate is the main indicator of control, which affects the final product quality. In the prior art, in the production process of vinyl acetate, in order to ensure that the purity of the final product can meet the standard, the quality control is generally carried out by manual sampling at regular intervals; manual sampling for detection is cumbersome to operate and the monitoring data lags behind , cannot r...
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IPC IPC(8): G01N21/41B01D3/14B01D3/42
CPCB01D3/14B01D3/42G01N21/41
Inventor 丁丽婷吕新坤胡明源李承龙古文正
Owner YUNNAN YUNTIANHUA