SU339216A1 - FEEDER FOR FEEDING OF RAW BULK MATERIALS - Google Patents

Description

The invention relates to feeders for the supply of raw bulk materials and can be used to supply, for example, high-moisture coal with clay inclusions from the bunker to the place of entry into the mill in the pulverization systems of boilers of thermal power plants.

There are known feeders for feeding raw granular materials, nalimer of high lignite coal with clay inclusions, containing a suction inlet and a scraper feeder installed under it with a web in the form of tension on the drive sprockets and guide rollers of the multi-chain with the scraper.

The chain (canvas) forms two branches located one above the other.

The upper working branch has a table installed under it, along which the material is moved with the help of scrapers, and the lower one, which is free-hanging, serves to tension the chain.

The known feeders are of considerable size due to the large height and width of the bottom outlet pipe from the feeder material. In addition, they are not very reliable due to the “sticking of the material to the walls of the outlet nozzle.

The purpose of the described invention is to reduce the size and increase the reliability of the feeder. To achieve this goal, the lower branch of the chain (web) is divided.

in two parts: a worker — with a table set under her and sagging freely — to create tension on the web. The table under the lower branch has a slope of no more than 15 °, the length / J of the table under the lower branch is from 1/3 to V distance 4 between the axles of the sprockets and rollers, and the height AI from the point of contact A of the chain with the roller to the vanishing point B its € 0 table below the lower branch is between 1 and 1.5 heights / 12 between the axles of the sprockets and

commercials.

FIG. 1 shows a schematic of a feeder, vertical section; in fig. 2 - feeder, in plan; in fig. 3 shows an embodiment of the assembly (tensioning roller), front view; on

FIG. 4 - the same, side view.

The feeder includes a housing 1 with a receiving pipe 2 suspended from a bunker (not shown in the drawing) and a discharge pipe 3 connected to the conveyor 4 feeding

material from the feeder to the place of consumption (mill, etc.), scraper feeder with blade 5, having two branches located one above the other with scrapers 6, upper table 7, TABLE 8 under the lower branch, rippers

control of their position with respect to the canvas, 10-layer controller with remote control, agitators 11, upper shaft with guide rollers 12, lower shaft with direct sprockets 13, gear 14 and motor 15 of the canvas 5, gear 16 and motor 17 tra "€ Porter 4.

Powered feeder as follows.

The raw material (fuel) flows from the bunker through the receiving pipe 2 onto the inclined upper table 7, is moved along it by scrapers 6 of the upper working branch of the blade 5 and is dropped onto the table 8 by the lower branch from which it enters the conveyor 4. Wet fuel with clay inclusions before entering the table 8 is loosened by rotary-type rippers 9, which are mounted above the upper branch of the blade 5. To prevent fuel from being dragged onto the drive sprockets 13 and guide rollers 12 above the metering blade 5 across the entire width lenses agitators 11. A scraper doser blade 5 and a trans orter 4 are driven by self-contained drives, the movement of which can be synchronized if necessary. Performance control is carried out by varying the speed of the motor.

The thickness of the fuel layer coming out of the inlet pipe is set by the 10 layer regulator, which is remotely controlled.

FIG. 3 and 4, an embodiment of the tensioning rollers in the form of fixed half-discs 18 with grooves 19 for guiding the chain is shown.

Subject invention

Claims (5)

1. A feeder for feeding raw bulk materials, for example, high-moisture coal with clay inclusions, containing a suction inlet and an installed beneath it is a scraper batcher with a web in the form of tensioned on drive sprockets and guide rollers of a multi-link chain with a scraper arrangement of a scraper having two located one above the other branches, characterized in that, in order to reduce overall dimensions and increase reliability, the lower branch is divided into two parts: a worker — with a table underneath and free sagging — to create a web tension. 2. A feeder according to claim 1, characterized in that the table under the branch has a slope to the horizon of not more than 15 °. 3. Feeder on PP. I and 2, characterized in that the length of the table under the lower branch is from 1/3 to 1/2 the distance between the axes of the sprockets and the rollers. 4. A feeder according to claim 1 and 2, characterized in that the height from the point of contact of the chain with the roller to the point of its descent from the table under the lower branch is from 1 to 1.5 times the height between the axles of the sprocket and the roller. 5. The feeder on PP. 1-4, characterized in that the rollers are made in the form of fixed half-discs with grooves for guiding the chain. . GZh4 / 3 2 12 2 t ± il -f Fig.z /eight .