The invention discloses an on-line detection system for preparing ethylene glycol with synthetic gas in the industrial production. The on-line detection system comprises an analyzing cabin, an intermediate infrared analyzer, an IPC, a PLC, a DCS, an SIS, a gas alarm, an anti-explosion draught fan, a police whistle and an alarm lamp, wherein the PLC is used for controlling the anti-explosion draught fan, the police whistle and the alarm lamp to work according to the gas concentration in the analyzing cabin measured by the gas alarm to take explosion precautions; the intermediate infrared analyzer is used for detecting the content of process gas and transmitting detection results to the IPC; the IPC is used for displaying and calculating the detection results and transmitting the detection results and calculation results to the PLC; the PLC is used for storing and judging the detection results and the calculation results, sending controlling signals to the SIS and sending data results to the DCS; the SIS is used for controlling an interlocking device according to the controlling signals; the DCS is used for displaying the data results and operated by operators to adjust and control the production technology according to displayed data. According to the invention, the problems in the prior art that the production technology for preparing the ethylene glycol with the synthetic gas is severely backward in detection and analysis, low in reaction efficiency, poor in security and stability, and the like are solved.

On-line detection system for preparing ethylene glycol with synthetic gas in industrial production

The invention discloses a test analysis system. The test analysis system comprises a box and multiple test vessels stored in the box, the test analysis system further comprises a test gas preparationmodule, a test reaction environment management module, a test sample flow path selection and management module, a test sample analysis and pretreatment module, a test sample analysis instrument moduleand a test control module, wherein the test gas preparation module is used for preparing test gas and injecting the test gas into the box; the test reaction environment management module is used formanaging and controlling a test environment in the box; the test sample flow path selection and management module is used for selecting a flow path and enabling test samples after tests into the flowpath; the test sample analysis and pretreatment module is used for analyzing and pretreating the test samples; the test sample analysis instrument module is used for analyzing the test samples; the test control module is used for controlling the test gas preparation module, the test reaction environment management module, the test sample flow path selection and management module and the test sample analysis and pretreatment module. According to the test analysis system, man-machine automation is realized, and a test sample degradation process can be completely recorded.

Test analysis system

The invention discloses a gas drying system in the technology of preparing ethylene glycol from synthesis gas. The system comprises an oxidation and esterification tower (1), a condenser (2), a drying device and a cooler (5) all connected in sequence through pipelines, wherein the bottom of the drying device is connected with a heater (6) and a circulator (7) in sequence; a gas outlet is formed in the upper part of the cooler (5) connected with the circulator (7); the drying device is connected with a carbonylation reaction unit; a storage tank is connected onto a pipeline between the drying device and the cooler (5), and is internally filled with alkali liquor. According to the invention, poisonous gas is not emptied to the atmosphere in the blowing and replacing during the regenerative process of the device, so that the emission of harmful gas is avoided, and the environment is protected; besides, the nitrogen consumption is reduced, and the production is reduced; in addition, the control process of the whole technology is comparatively stable, and the production operation of chemical industry personnel is convenient.

Gas drying system and method in technology of preparing ethylene glycol from synthesis gas

The utility model discloses a real-time esterification and carbonylation reaction on-line analysis system for ethylene glycol production industry through synthesis gas. The system comprises an esterification tower and a carbonylation reactor, wherein the tower top outlet of the esterification tower is connected to the tower bottom inlet of the carbonylation reactor through a reaction gas pipeline; a process gas outlet pipeline is connected to the tower top outlet of the esterification tower and the tower top outlet of the carbonylation reactor; a sampling analysis pipe branch connected with an infrared spectrometric analyzer is arranged on the reaction gas pipeline; a gas pretreatment device is arranged on the sampling analysis pipe branch; a gas heater is arranged on the sampling analysis pipe branch between the gas pretreatment device and the infrared spectrometric analyzer. Recycle gas on the esterification and carbonylation sections is quantitatively analyzed on line by utilizing the infrared adsorption spectrum, the hysteresis quality of manual sampling and chromatographic analysis is solved, and the system has a good effect of guiding the normal production adjustment. The safe and stable production of the device is promoted, and manpower and time can be saved.

Zhang Hongliu

Papers

Real-time esterification and carbonylation reaction on-line analysis system for ethylene glycol production industry through synthesis gas