SU852209A1 - Device for dewatering material - Google Patents

Description

one

The invention relates to a device for dewatering materials, preferably swine manure.

A device for dewatering pig manure is known, comprising a manure receiver connected by means of a pipeline to a settling tank, a sludge collector, a filtering centrifuge and an additional settling tank communicated with a collecting centrifuge 1.10.

However, such a device has a complex structure.

Closest to the present invention is a device for dewatering materials, including a casing in which 15 a perforated vertical casing is made with a narrowing downward with a screw placed in it, and filtrate chambers located between the casing and the casing and divided between each other in height. through partitions 2.

A disadvantage of this device is its low efficiency in dewatering pig manure and obtaining an impure liquid fraction.

The purpose of the invention is to increase the efficiency of dehydration.

This is achieved by the fact that the device is equipped with a vacuum pump, suction

The connecting pipe of which is in communication with the upper chamber for the filtrate and with scrapers for removing the sediment, having the form of a spiral and attached to the upper part of the screw shaft at a length equal to the height of the said chamber.

 The drawing shows schematically a device for dewatering materials, mainly pig manure, a general view.

The device comprises successively installed storage tank 1 with a stirrer 2 and a pump 3, a settling tank 4 with a horizontal screw conveyor 5 and a vertical screw pump 6 placed in a chamber 7 located outside the settling zone. The sump 4 is provided with an inlet stream 8 and a tray 9 for draining the liquid fraction and is connected to a filter press 10 consisting of a perforated vertical casing AND made with a downward constriction, a chamber 12 for supplying manure, a pressing screw 13 and a casing 14 divided in height by means of the partition 15 to the hermetic chambers 16 and 17 for the filtrate. Moreover, the upper chamber 17 is connected to the suction pipe of the vacuum pump 18 and is equipped with a hydraulic lock 19, which prevents it from communicating with the atmosphere when the filtrate is drained. Scrapers 20 are mounted on the screw shaft 13 in the zone of location of the upper filtrate chamber 17 for removing sediment from the inner surface of the housing And, having the form of a spiral.

The device works as follows.

The source manure entering the storage tank 1 is periodically mixed with a stirrer 2 and pumped by pump 3 to a settling tank 4, entering it through a damper 8 of flow. Separated liquid is discharged from the upper layers of tray 9. The suspended solids accumulate in the lower part of the settler, where they are transported by conveyor 5 to chamber 7. Then the sediment is fed to the second stage of dehydration by means of conveyor 5 and the sediment is fed through chamber 12, which prevents the inner cavity of the housing from communicating with the atmosphere. Sludge dehydration in the upper part of the body occurs due to the pressure difference created by the vacuum pump 18. The sediment accumulating on the inner surface of the body is continuously removed from it by scrapers 20 and fed to the screw 13, which carries out the final spin of the sludge. The filtrate from chambers 16 and 17 is removed for further processing. The location of the chamber 7 outside the settling zone, the supply of sediment into it by a low-speed screw conveyor 5 and the depth of the chamber relative

the bottom of the sump 4 prevents the suspension of the spawning mass in the sump when pumping it with a screw pump 6.

By such an embodiment of the device, the efficiency of manure dewatering is significantly increased.

Claims (2)

1. Badanov I.N. and others. Cleaning and utilization of manure at pig-breeding complexes. M., Rosselkhozizdat, 1977, p. 100, fig. 31. 2. USSR author's certificate number 217214, cl. In the call 9/14, 1966 (prototype).