Rod, device and method for detecting dust position

Abstract

The invention discloses a rod, a device and a method for detecting a dust position. The rod for detecting the dust position is provided with a plurality of enlarged radio frequency admittance level gage probes, a sheathed temperature gauge and gas spray equipment; and the outer surface of the rod is covered with an insulation protection jacket, a supporting protection sleeve and the like. The device for detecting the dust position consists of a material detection controller which comprises operation display equipment, an external gas source device and the like. In the method for detecting the dust position, three gas spray automatic control modes are set; the first detection of a material signal and a temperature signal is a core event; a mutual checking working manner of a dust position confirmation signal is sent out until at least two material signals are stably consistent with each other after triggering and spraying is finished; and two manual modes protect the safety of a person in a special working state. The arrangement mode of the enlarged detection probes and the plurality of level gauges enlarges the contact area and is very favorable for materials having poor flowability; and then, due to the equal arrangement area, the detection and the sampling are more typical.

Description

technical field [0001] The invention relates to a device and method for measuring the position of solid materials. Background technique [0002] It has long been a technical problem to detect the material level of dusty materials with poor fluidity and easy compaction, which is caused by the characteristics of dusty materials. Taking the ash level detection in the process of gas dry dust removal in the field of environmental protection as an example, a brief description is given. [0003] After the high-temperature and high-pressure gas containing a large amount of dust is filtered and dedusted by a cloth bag, the clean gas is recycled, and the collected dust falls into the ash tank after being blown back. When the dust collector is working, the lower ash discharge valve is closed. At this time, the collected dust continues to accumulate, and the ash level continues to rise. When the material level is low, the ash discharge valve should be closed immediately in order to pr...

AI Technical Summary

Problems solved by technology

The structural form of a single level gauge without protection measures is almost impossible to work in a fluctuating and harsh environment for a long time, and it is extremely easy to damage and fail

[0015] In addition, actively intervene in the initial natural stacking state of dusty materials with non-uniform density, undulating stacking, dust coagulation, and easy compaction, improve the external working environment of ash level detection, and overcome poor ash discharge. There are several methods as follows, but none of them can achieve the desired effect well

[0016] For example, the vibration of the wall of the ash tank can change the arrangement of the dust to a certain extent in the early stage, smoothen the peaks of the stacking, and eliminate the voids caused by hardening or suspension, but another problem is that the stacking of dust is random As the vibration continues, it will become denser and easier to harden, which is extremely unfavorable for subsequent ash unloading operations, so this method has been used with caution in many occasions

[0017] There is also gas purging from the outside to the inside. The local effect of blowing and agitating the dust is more obvious, but the area that cannot be purged by the gas becomes a dead angle; at the same time, the purging gas is limited by pressure, temperature, nozzle characteristics, material particle size, density, etc. , the effective distance blown in the dust is limited

[0018] In order to increase the blowing distance, an air (nitrogen) cannon is used to make use of the characteristics of more destructive shocks generated by the pulsed gas, to stir the dust material as much as possible, and to cooperate with the change of the shape of the nozzle and the adjustment of the launch angle, and other measures have been achieved. Good expected effect, but when the gaps of dust particles contain moisture, resulting in hardening, the effect is greatly reduced compared with the dry dust state, because the area of ​​the gas of various nozzles directly contacting the dust material is very small, making the actual effective agitation The area of ​​the dust material is limited, and the result of the gas injection in the above-mentioned heavily compacted dust containing more water is to form a slender cavity similar to the shape of the cross-sectional area of ​​the nozzle, commonly known as "mouse hole".

[0019] Mechanical agitation is the most direct and effective, but energy consumption and wear cause high operating costs. In addition, sparks and flying dust caused by it will directly increase the risk of explosion, and the places where it can be applied are limited.

[0020] Shaking or tipping the tank to re-accumulate and arrange the dust structure will be very difficult to achieve in front of industrial large-scale equipment

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