Full-automatic real-time sampling system and method for calorific value instrument in coking industry

Abstract

The invention provides a real-time sampling system and method for a calorific value instrument in the coking industry. The system comprises a coke oven gas pipeline, a raw gas pipeline, the calorific value instrument, a sampling pipeline and a first differential pressure transmitter; and the first differential pressure transmitter is arranged on a differential pressure detection pipeline between the coke oven gas pipeline and the raw gas pipeline. The sampling pipeline comprises a flowing pipeline and an indoor sampling pipeline; the inlet of the flowing pipeline is connected with the coke oven gas pipeline, and the outlet of the flowing pipeline is connected with the raw gas pipeline; the middle section of the flowing pipeline is located in the calorific value instrument chamber and connected with an inlet of the indoor sampling pipeline, and the outlet of the indoor sampling pipeline is connected with the calorific value instrument. The method comprises the following steps: researching the problem of large time lag of sampling, establishing a flow pipeline by using pipeline pressure difference between raw gas and coke oven gas as a power source according to the actual site condition that the coke oven gas pipeline and the raw gas pipeline are positioned on the same pipe gallery in a coking enterprise, sampling a gas source on the pipeline, and giving a calculation formula of the sampling transmission delay time, so that the sampling delay is reduced.

Description

technical field [0001] The invention relates to the technical field of calorific value meter sampling in the coking industry, in particular to a fully automatic real-time sampling system and method for a calorific value meter in the coking industry. Background technique [0002] The gas calorific value refers to the heat released by the gas after complete combustion, which is the most important quality index of the gas. As the main gas source for coke oven heating, coke oven gas has a great influence on the coke oven temperature, and coke oven temperature is an important factor affecting coke output and chemical product yield. Therefore, accurate and real-time measurement of coke oven gas heat The value is of great significance for optimizing gas ratio and coking production. There are many methods for measuring the calorific value of coke oven gas. Generally can be divided into two categories: one is the direct method, and the other is the indirect method. The direct meth...

AI Technical Summary

Problems solved by technology

However, in the actual measurement process, the calorific value meter has high requirements for the installation location, and is generally equipped with a separate calorific value meter room, resulting in too long sampling pipelines

Due to the small amount of gas used by the calorific value meter and the slow coking reaction speed, there are more sampling gas sources in the sampling pipeline of the traditional method, resulting in a large time lag in calorific value measurement

Especially when it is used for gas proportioning, there is a serious lag, which cannot meet the real-time control requirements and affects coking production

Images