Computer aided calibration method for coal flow meter in shell coal gasification process

Abstract

The invention relates to the technical field of meter calibration, and discloses a computer aided calibration method for a coal flow meter in the shell coal gasification process, which includes: acquiring production information related to a coal circulation phase online to automatically divide coal circulation load intervals and automatically search stable flow intervals; estimating reliability of data of the stable intervals; and finally giving linear regression, quadratic regression and cubic regression functions according to the calibration requirement, and giving a selection standard for regression ways. The computer aided calibration method can be used for effectively avoiding errors occurring in manual reading and calculation in calibration of a traditional coal flow meter, improving flexibility of data processing, and increasing calibration speed and improving calibration precision evidently.

Description

technical field [0001] The invention relates to the technical field of meter calibration, in particular to a computer-aided calibration method for coal flow meters in the Shell coal gasification process. Background technique [0002] Coal gasification converts coal to hydrogen-containing 2 , CO synthesis gas, which provides production raw materials for downstream processes, and can be called the leader in the field of coal chemical industry. As a second-generation coal gasification technology, Shell Coal Gasification (SCGP) has the advantages of high efficiency, energy saving, and low pollution. It is currently one of the cleanest coal comprehensive utilization technologies. From the perspective of process characteristics, SCGP belongs to dry powder feeding and entrained bed gasification. In this process, pulverized coal and oxygen flow into the gasifier in parallel, and complete temperature rise, volatile matter removal, cracking, combustion and gasification in a very shor...

AI Technical Summary

Problems solved by technology

[0006] (1) The calibration process is completed manually by the operator, usually by transcribing data from the historical trend of DCS (distributed control system) at a certain sampling interval (usually 5 minutes) for calculation, which is not only time-consuming, laborious, inefficient, but also prone to transcription or miscalculation

[0007] (2) The sampling period of the production data of the pulverized coal pipeline is 1s. Manual transcription can not make full use of the production data, and also makes the data processing lose flexibility

[0008] (3) Due to limited energy, operators generally only calibrate the flow meters used for control on the four pulverized coal pipelines, but the meters used for interlocking have not been calibrated, which makes it difficult to effectively use the redundant information provided by the interlocking meters , which is not conducive to the implementation of the pulverized coal pipeline data correction and fault diagnosis scheme

[0009] (4) The existing meter calibration adopts the linear regression method, which does not fully consider the nonlinear factors in the static characteristics of the coal flow meter, resulting in low calibration accuracy, and the manual calibration method is not easy to achieve high-order regression

Images