SU83790A1 - Feeder for loading pulping boilers for chips - Google Patents

Description

When continuously cooking pulp in a row of cooking boilers in series or in a single continuous cooking cooker, it is necessary to regularly feed the chips with acid into the pressure cooker, and sometimes under vacuum.

At the same time, it is necessary to remove excess gases and steam from the cooking apparatus, the amount of which must regulate. In known feeders, the loading of pulping pulp boilers with chips is carried out by injection of the chips with steam under pressure.

A specific feature of the described feeder is the use of a cylinder with two guns, equipped at one end with a receiving hole and at the other end - with an outlet hole connected to the feed unit. An automatic relay was used to automatically regulate the stroke of the axes in the cylinder, which allows the excess gas and steam to be removed from the digester by adjusting the radius stroke.

FIG. 1 shows a feeder for charging pulping boilers for chips, a longitudinal section; in fig. 2 is a section along A-A in FIG. one; in fig. 3 is a view according to BB in FIG. one.

Chips are dry or with acid from the hopper / supplied by their own weight to the receiving part of the cylinder 2 of the feeder; Using two simultaneously moving front 3 and rear 4 chips, it moves to the middle part 5 of cylinder 2, which is at that moment divisible from the nutritious part and then fed to the outlet open 6, which has a message to the digester where the chips fall.

During the return stroke of the pistons, the rear piston 4 begins to move earlier than the front piston 3, therefore the distance between these pistons No. 83790

it decreases, and the volume between them, filled with stripping gases and steam, decreases simultaneously. The size of this volume is regulated depending on the required number of blows.

When returning to the receiving part of cylinder 2, the rear piston 4 stops before the front piston 3 and thus the volume of the feeder is restored to its full size, then the cycle of movement of the pistons is repeated.

The movement of the pistons 5 and 4 comes from two motors synchronously operating through gears (not shown in the drawing). Gears 7 and S are mounted on piston 9 rods 3. Gear hub 8 and piston rod are screwed, due to which, when gear 5 rotates, piston rod 9 with piston 5 receives a forward movement, using a similar mechanism, piston piston rod 10 moves.

The regulation of the stroke of the pistons, as well as the reduction of the distance between them, are performed by an electrical relay (not shown in the drawing).

To separate the chips entering the cylinder 2 from the chips located in the hopper 1, a shutter 11 is provided. By moving the pistons 3 and 4 in the forward direction, the gate bars // using a hydraulic cylinder 12 and the gear sectors 13 raise and lift the necks in the bunker / over the outlet. During the reverse movement, the grate bars of the bolt 11 lower and open access to the chips in the cylinder 2.

To ensure smooth travel and ease the operation of electric motors as they move forward to the rear of cylinder 2, steam is given through pipe 14, and when moving backward, steam through the same pipe is released. A hole 15 serves to exit the condensate from the cylinder.

Due to the tight fit of the contact surfaces, the feeder maintains the pressure present in the digester and allows the excess steam and gases to be removed from it regularly.

Subject invention

Claims (2)

1. A feeder for charging pulping boilers with chips, characterized in that it uses a two-piston cylinder for regular supply of chips, equipped at the one end with a receiving hole and at the other end - an outlet opening connected to the fed aggregate. 2. A feeder according to claim 1, characterized in that an electric relay is used to automatically regulate the piston stroke in the cylinder. i cs