Pneumatic transport facility for chlorine bypass dust, and cement kiln exhaust gas treatment system equipped with the facility

Abstract

Provided is a transport facility for chlorine bypass dust, in which the occurrence of a blockage in a pipe can be reduced during the transport of the chlorine bypass dust. A pneumatic transport facility for dust collected from a cement kiln exhaust gas, comprises: a first dust collection tank which is equipped with an inlet port and a discharge port for a cement kiln exhaust gas, a dust collector for collecting dust from the cement kiln exhaust gas, and a discharge port for the collected dust; a pressurized tank which is equipped with an inlet port for the dust from the first dust collection tank, an inlet port for air and an discharge port for pneumatic transport of the dust and which enables the pneumatic transport of the dust by means of compressed air; an air supply source which supplies dried and compressed air having an atmospheric dew point of -35 DEG C or lower to the pressurized tank; and a second dust collection tank which is equipped with an inlet port for dust that is pneumatically transported from the pressurized tank through a second pipe, a dust collector for collecting dust, and a discharge port for air.

Description

technical field [0001] The invention relates to pneumatic conveying equipment for chlorine bypass dust. In addition, the present invention also relates to a cement kiln exhaust gas treatment system equipped with the pneumatic conveying equipment for chlorine bypass dust of the present invention. Background technique [0002] The exhaust gas of cement kiln equipment contains volatile components such as alkaline chloride and alkaline sulfate. These volatile components circulate in the cement kiln equipment between the preheater and the kiln, while gradually concentrating and blending into the clinker, which adversely affects the quality of cement, and also adheres to the preheater, etc. as a coating Therefore, part of the waste gas is extracted from the volatile component concentration area near the kiln tail of the cement kiln (Japanese Patent Application Publication No. 9-175847, Japanese Patent Application Publication No. 11- 35355, Japanese Patent Laid-Open No. 2001-3353...

AI Technical Summary

Problems solved by technology

However, since the chlorine bypass dust has deliquescence properties, there is a problem that if the wall surface temperature of these storage tanks is lowered, the deliquescence will cause clogging of the pipes, making it difficult to remove the chlorine bypass dust from the storage tanks.

[0013] However, the method of slurrying chlorine bypass dust as described in JP 2000-354838 A is considered to easily cause corrosion and clogging of the water spray nozzles in the mill.

As a result, it is difficult to control the amount of sprayed water from the nozzle, and fluctuations in the amount of sprayed water are likely to cause fluctuations in the temperature at the outlet of the mill, which may also affect fluctuations in cement quality

Images