Circular pipeline full-area flow meter

Abstract

The invention belongs to the technical field of flue gas flow measurement equipment, and aims to provide a circular pipeline full-area flow meter which is not liable to block, clogging, high in measurement accuracy, long in life, stable and reliable. On the same cross section in the circular pipeline, two sets of sample tubes are orthogonally arranged, wherein each set of sample tube comprises a total pressure tube and a static pressure tube; the total pressure tubes and the static pressure tubes are arranged back to back; a plurality of total pressure sampling holes are formed in the total pressure tubes in the windward direction; a plurality of static pressure sampling holes are formed in the static pressure tubes in the opposite direction. The circular pipeline full-area flow meter is accurate in measurement result; a purging device is arranged to regularly purge the total pressure tubes, the static pressure tubes and various outlet pipes in the reverse direction, so that the circular pipeline full-area flow meter has the functions of preventing blockage and cleaning ashes, and is not liable to block, low in maintenance, stable, reliable, and long in service life; the flow meter can continuously and accurately measure the flue gas flow speed (flow rate) on line in the industrial waste gas pipeline which is of complex arrangement and disordered flow field to meet the requirement of the environmental protection department on online monitoring accuracy, continuity and reliability for exhaust emission.

Description

technical field [0001] The invention belongs to the technical field of flue gas flow measurement equipment, in particular to a circular pipe full-section flowmeter. Background technique [0002] At present, the general method of measuring the flow rate (flow rate) of industrial exhaust gas is to use the traditional one sampling point (point measurement) or several measurement points (line measurement) measurement method, which can only be used under the condition of uniform flow field or relatively uniform flow field. Accurately measure the flue gas flow. If the flow field is uneven or turbulent, neither point measurement nor line flow measurement can accurately measure the average flow velocity at the cross-section. However, due to the actual conditions of the industrial waste gas discharge pipelines in the electric power, petroleum and chemical industries, such as process and space constraints, it is difficult for the waste gas pipelines to achieve a uniform flow field or ...

AI Technical Summary

Problems solved by technology

However, in actual use, the flowmeter is easy to be blocked, has a large maintenance workload, is easily damaged, and has a short service life. Moreover, due to the chaotic arrangement of the total pressure pipe and the static pressure pipe, the measurement results still have large errors and low accuracy. question

Images