Use sprays as suggested by Lyle. The collection tank will have to collect the debris shaken off by the beating action of the cleats. ■

Messy things cleated belts. There are rotating brushes with long 'bristles', beater rollers, air knives etc.

Don't think anything is a perfect solution. ■

Consider using a wider belt with a shallow "chevron" cleat pattern.

Use a motorized belt beater on the back of the belt followed by a motorized brush on the carrying side. This means you need a lot of room below the head end, like an open stockpile.

Even then you are asking for big trouble. The first time I did a wet ash belt, (uncleated), we just used a good quality scraper and put pans under the full length of the conveyor to collect the dribble which we intended to hose out "once in a while". That turned out to be every 8 hours or so or they would overflow & buckle. We put on a motorized cleaner on the carrying side & everything went OK afterwards. But, this was on a smooth belt!

I have used a brush on a chevron belt with fairly good results, but it wasn't on ash.

If you must used a belt with any kind of cleat, be prepared for the worst, and you will not be disappointed ■

Hello Adrian..

This is a case of deja-vu.

This problem has been going for years with some people putting in Pan conveyors (fatal), Pocket belts (fatal) Sicon conveyors (never again) Cleated conveyors (messy) etc...etc...

The problem is, as you indicate, the angle is 20 degrees which is just too much. We put our wet ash conveyors in at 11 degrees any steeper than that you either need to speed it up, or put a tight pipe conveyor which will do the 20 degees, as long as you don't have to handle the odd large clinker lump.

Often the best solution is a chain scraper conveyor.

Normally, the amount of wet (bottom) ash conveyed is quite low so a scraper can easily do it. We also use the scraper conveyor with a herring bone drainage system to de-water the ash further to help the downstream system.

Also, you could simply pump the the ash.. like the old days.

Regards

LSL Tekpro ■

Dos Santos Sandwich Belt High-Angle Conveyors have been used successfully to elevate wet bottom ash. Dos Santos Sandwich Belt systems use conventional smooth surfaced rubber belts that can be continuously scraped with conventional belt scrapers.

In the first such application the sandwich belt conveyor replaced a scraper type chain conveyor, with herringbone grooved drainage, as described by Mr. Graham Spriggs. Subsequent systems at the same power plant chose and installed sandwich belt systems and did not again consider the scraper chain type conveyor.

Joe Dos Santos ■

Dear SAE (?)

There are too many types of side wall belts! What type do you have?

If there is also a problem with the return rolls please give me an information!

In the case you have only side walls, you have rubber rings with big diameter inside and smaller rings in the area of the side wall.

I manage this problem with a special roll with three rolls on one axle ! in the middle for the big rings with about with diameter 400 and in the area of the side wall with diameter 110 mm. In the area of 110 it would be useful to get rings form "B" out of poliurethan If you have it please tell me that.

Best regards

Peter Blaha, Aschheim near Munich/Germany ■

Dear SAE (?)

There are too many types of side wall belts! What type do you have?

If there is also a problem with the return rolls please give me an information!

In the case you have only side walls, you have rubber rings with big diameter inside and smaller rings in the area of the side wall.

I manage this problem with a special roll with three rolls on one axle !

In the middle for the big rings with about diameter 400 mm and in the area of the side wall with diameter 110 mm.

In the area of 110 it would be useful to get rings form "B" out of poliurethan If you have it please tell me that.

Best regards

Peter Blaha, Aschheim near Munich/Germany ■