Movable high-temperature sampling probe capable of automatically cleaning ash

Abstract

The invention belongs to the technical field of cement gas analysis devices. The invention provides a movable high-temperature sampling probe capable of automatically cleaning ash. The movable high-temperature sampling probe comprises an ash cleaning movable device, a filter, an outermost interlayer, a middle interlayer and an innermost interlayer. The probe can realize the following effects: (1) the probe can automatically clean ash and purge without withdrawing out of the kiln; (2) the probe is light in weight, high in heat exchange efficiency and free of deformation after long-term use; (3) the probe is directly butted with the high-temperature filter through a flange, so that cold points and blockage are avoided, and the sealing performance is good; and (4) a sample gas channel is narrow, and large-particle dust cannot enter the probe.

Description

technical field [0001] This patent belongs to the technical field of cement gas analysis device. Background technique [0002] In the cement production process, it is necessary to treat various gases CO, O in the cement kiln 2 , NO, CO 2 On-line analysis can be carried out to realize real-time monitoring of the combustion status. By adjusting the air intake and other measures, the combustion efficiency can be improved, the energy consumption can be controlled, the quality of cement clinker can be optimized, and safety warning can be realized. The high-temperature sampling probe is a gas sampling device used in the cement production process. It can be inserted into the kiln through the smoke chamber to continuously sample the high-temperature, corrosive and dust-containing process gas from the rotary kiln and ensure subsequent The normal analysis of the gas analysis system extends into a total length of about 1700-2000mm. The samples taken can more truly reflect the composi...

AI Technical Summary

Problems solved by technology

The dust content in the cement rotary kiln can reach 2000g / m 3 ,The sample gas containing high dust passes through the probe and enters the sample filter. The probe and filter will be blocked by so much dust in a short period of time. Generally, the probe will be withdrawn from the kiln after several hours of use. Perform purging and cleaning. With the exit of the probe, the temperature of these high-density dust and other media drops rapidly, and it is easy to stick to the inner wall of the probe and the inner and outer surfaces of the filter. Sometimes it cannot be purged and needs to be dismantled and cleaned manually , which brings great inconvenience to the use on site

The existing sampling probes: (1) The efficiency of the cooling circuit is low, the temperature of the outer wall of the probe is high, and it will be deformed after long-term use; (2) The inside of the probe is blocked, and it is difficult to clean the dust, so it cannot be continuously sampled for a long time; (3) The probe and high-temperature filtration The sensor is connected through a stainless steel tube, and the cold spot of the stainless steel tube is often blocked and cannot be cleaned; (4) In addition, the connection between the stainless steel tube, the probe, and the high-temperature filter is prone to air leakage

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