JPH0452671Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] Industrial field of application The invention is based on the following: For example, by extracting fly ash discharged from a combustion device such as a boiler that burns coal and determining the value of unburned content in the fly ash. The present invention relates to an automatic fly ash collection device for knowing the combustion state of the above-mentioned combustion equipment and using it as data for combustion optimization and for quality control of fly ash to be sold as an industrial product.

Conventional technology Conventionally, the discharge system for the collected ash of an electrostatic precipitator was a batch type, so a new sample of ash could only be taken out immediately after the ash was discharged from the dust collector, that is, once every few hours. There was nothing I could do.

Problems that the invention aims to solve: The actual combustion state changes from moment to moment, and the unburned content value also changes constantly during fly ashing. The reality was that even if combustion management was implemented, it did not make much sense due to the time lag.

This invention was developed to solve the above-mentioned conventional problems, and its purpose is to make it possible to easily take out the new fly ash immediately after collecting dust at any time without affecting the performance of the dust collector. The purpose of the present invention is to provide an automatic fly ash collecting device.

[Structure of the invention] Means for solving the problem The automatic fly ash sampling device of the invention continuously takes out the fly ash immediately after dust collection from the inclined part of the electrostatic precipitator hopper, and transfers it to the sampling hopper via a rotary feeder. send.

When sampling, insert the ash box into the sampling hopper and take out the required amount of fly ash sample.

When not sampling, fly ash enters the ejector through the hole at the bottom of the sampling hopper and is pneumatically transported into the dust collector hopper via the ash return line by compressed air accelerated by the air mover.

The hopper mounting positions of the fly ash take-out part and the ash return line are staggered so as not to interfere with each other.

In addition, a collecting plate for collecting fly ash is installed in the hopper on the upstream side of the collection hole in a manner that expands toward the end to improve fly ash collection efficiency.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a lower hopper of an electrostatic precipitator, and a sampling hole 1a is bored at an appropriate position on an inclined part of the lower hopper. As shown in FIG. 2, a collecting plate 2 for fly ash dust collection is attached to the upstream side of the sampling hole 1a in the hopper so as to spread outward.

The fly ash collected by the collecting plate 2 enters a collecting hopper 3 and drops into a sampling hopper 5 via a rotary leaf order 4.

When collecting fly-assembly samples,
Insert the assembly receiving box 3 into the sampling hopper 5 and take out the required amount of sample fly assembly.

When not collecting sample fly-assets,
The fly ash in the sampling hopper 5 enters the ejector 7, and is returned to the hopper 1 from the return port 9a via the ash return line 9 by compressed air for air transport accelerated by the air mover 8. The position of the sampling hole 1a of the fly ash take-out part and the position of the return port 9a of the ash return line 9 are installed so as to be shifted from each other so as not to interfere with each other.

Incidentally, the vibrator 10 is operated intermittently to prevent fly ash clogging or bridging from occurring within the sampling hopper 5.

It is conceivable that clogging or bridging of the fly ash may occur in the collecting hopper 3 when the machine is restarted. In this case, the pulsed air 11 releases the clogging in the collecting hopper 3 to facilitate starting.

[Effects of the invention] (1) Fly ash samples immediately after dust collection are taken out continuously from the inclined part of the electrostatic precipitator hopper of a coal-fired boiler, and new fly ash samples immediately after dust collection are quickly collected, so that the boiler etc. can be monitored in real time. It is possible to understand the combustion situation, and as a result,
Economical combustion can be carried out.

(2) The position of the return port of the ash return line is shifted from the position of the sampling hole, so new fly ash constantly flows into the sampling area.

(3) A collecting plate for collecting fly ash is installed in the hopper on the upstream side of the collection hole in a way that it spreads out toward the end, so it is possible to improve the collection efficiency of fly ash.

[Brief explanation of the drawing]

FIG. 1 is an explanatory view showing an embodiment of the automatic fly ash collecting device of the present invention, and FIG. 2 is a partially enlarged view taken in the direction of arrow A. 1... hopper, 1a... collection hole, 2... collecting plate, 3... collecting hopper, 4... rotary feeder, 5... sampling hopper, 6... attachment box, 7... Ejector, 8... Air mover, 9... Ash return line,
9a... Return port, 10... Vibrator, 11...
...Pulse Air.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Drilling a sampling hole at an appropriate position on the sloping part of the hopper of an electrostatic precipitator and continuously taking out the flyash immediately after dust collection, and transferring it to the sampling hopper via a rotary feeder. An ash receiving box is inserted into the sampling hopper to collect the required amount of fly ash samples, and the fly ash that is not to be sampled is sent through the ash return line using compressed air from an ejector installed at the bottom of the sampling hopper. This automatic fly ash collecting device is characterized by pneumatically transporting fly ash into a dust collector hopper and returning it. (2) The automatic fly ash collection device according to claim 1, wherein the collection hole and the return port of the ash return line are arranged at different positions. (3) The automatic fly ash collection device according to claim 1 or 2 of the above-mentioned utility model registration claim, characterized in that a collecting plate for collecting fly ash is installed in a hopper on the upstream side of the collection hole in a manner that spreads out toward the end. .