Device and method for measuring synthetic catalyst vapor concentration

Abstract

The invention discloses a device and a method for measuring the synthetic catalyst vapor concentration. The device comprises a water-acetylene conversion device and a gas chromatograph, wherein a gas inlet of the water-acetylene conversion device is communicated with an entrance of a tower; a gas outlet of the water-acetylene conversion device is communicated with a gas inlet of the gas chromatograph. The method comprises the following steps: blowing the water-acetylene conversion device with nitrogen having the purity being not less than 99% and removing moisture out of the water-acetylene conversion device; communicating the gas inlet of the water-acetylene conversion device to the entrance of the tower; analyzing the chromatography of acetylene gas with the gas chromatograph and calibrating on an acetylene standard curve to obtain the acetylene gas concentration; working out a vapor concentration according to a formula of (acetylene gas concentration-background value)*2. The device and the method have the beneficial effects that the device is simple, the measurement is rapid and the time and the cost are saved.

Description

technical field [0001] This patent designs the technical field of the measurement method of water vapor concentration, specifically the measurement method of the water vapor concentration in the synthesis catalyst. Background technique [0002] In the ammonia production workshop, in order to obtain a highly active ammonia synthesis catalyst, increase the production capacity of ammonia, prevent the moisture in the gas from entering the tower and act on the active iron as iron oxide, so that the active iron is reduced or loses its activity, especially in the synthesis The freshly filled iron oxide catalyst in the tower is filled with H 2 A large amount of water is generated during the flow reduction, which should be removed immediately. If the water generated by the reduction is too fast, the water concentration is too high. Although it has been separated, a small amount of water is still taken away and circulated into the tower to interact with the iron catalyst. There...

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Problems solved by technology

[0011] In this assay method, 5 kinds of solutions are used in common, and these solutions should be prepared as they are used. The unused solutions of the previous day must be poured out and cannot be reused. Cause waste of resources by pouring out the solution, causing environmental pollution

At the same time, 3 drying towers, 2 flow meters, 1 wet flow meter, 1 water potassium ball, 1 mixer, 4 calcium carbide drying tubes, 5 acetylene absorption tubes, etc. are needed, and the connection device is very complicated. It takes at least 4 people to participate and it takes 7 days to do 120 sets of data continuously to calibrate the colorimetric coefficient of this method, and then use the same device to take samples on site. This method is greatly affected by the weather

The sampling device of this method is complicated and the operation is cumbersome. One analysis requires the cooperation of three people, and it takes at least 20 minutes. In the process of operation, there are many human factors that cause errors, resulting in large errors and poor repeatability. The most important The problem is that the results of water vapor concentration cannot be made in time, which will affect the adjustment of production process parameters and further affect production consumption.

During the production process, it is required to analyze the water vapor concentration every half hour, but this method takes a long time and requires many people to participate, which cannot meet the requirements of the production process at all, so this method needs to be improved