Negative pressure detector of alumina plant chamotte kiln

Abstract

The invention discloses a negative pressure detector of an alumina plant chamotte kiln. A constant air current system box (1) is respectively connected with pressure sweeping samplers (2) arranged on a kiln head (9) and a kiln tail (10) by a tee pipe coupling (8), a pressure line (6) and a differential pressure transmitter (5); an air source inlet pipe is provided with a stop valve (7); and a flow measurement controller (3) and a pressure regulator (4) are arranged in the constant air current system box (1), wherein the flow measurement controller (3) comprises a rotor flowmeter and an adjusting knob, and the pressure regulator (4) comprises a pressure maintaining valve and a pressure gauge. The invention fundamentally solves the problems that the measurement is inaccurate and the blockage of the pressure line can not be prevented, thereby avoiding underburnt subquality products, and can also effectively control the flow of fuel pulverized coal, thereby reducing the waste of the pulverized coal to a certain degree. Meanwhile, the invention avoids maintainers frequently detaching meters and manually sweeping the pipelines in high-temperature radiation environments, thereby greatly lightening the labour intensity for the maintainers.

Description

technical field [0001] The invention relates to a clinker kiln negative pressure detection device in an alumina plant. Background technique [0002] Clinker sintering is an important process in the process of producing alumina by the combined method. In this process, the clinker kiln is mainly used to process the raw slurry supplied by the raw material preparation process, and sintered to obtain clinker, which is then crushed by the secondary crushing system and transported to the clinker dissolution process. [0003] The clinker kiln is divided into a drying zone, a preheating zone, a decomposition zone, a sintering zone and a cooling zone from the kiln tail to the kiln head. Among them, the sintering zone is about 5 to 10 meters long. In this zone, the material is directly heated by the flame of pulverized coal combustion, so that the raw material is sintered into the clinker. In order to avoid the occurrence of "under-burning" of the product, the control of the flame te...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a clinker kiln negative pressure detection device in an alumina plant to overcome the frequent clogging phenomenon existing in the prior art, the inaccurate measurement of the pressure values ​​at the kiln head and the kiln tail, resulting in "clinker" Underburning" and other deficiencies

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