SU1679986A1 - Manure fractionating device - Google Patents

Abstract

The invention relates to agriculture and provides increased operational reliability, quality separation of manure, as well as a reduction in the energy intensity of the process. In the perforated case on the drive shaft there is a multiple-entry auger. The body is made of a height equal to twice the value of its diameter. The turns of the screw do not reach the upper part of the pipe for the supply of the original manure. The protective device is made in the form of a cylindrical chamber 10. The inlet 11 nozzle has a slit 13 and communicates with the inlet pipe, the outlet 12 nozzle with the inlet pipe of the original manure. 1 h. the item of f-ly, 2 tab., 3 ill.

Description

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WITH

The invention relates to agriculture, in particular to devices for separating manure into solid and liquid fractions.

The purpose of the invention is to increase the operational reliability, quality of manure section, as well as reduce the energy intensity of the process.

FIG. 1. shows a device for separating manure into fractions; in fig. 2 - the same protective device; in fig. 3 shows section A-A in FIG. 2

A device for separating manure into fractions comprises a casing 1 in which a perforated vertical casing 2 is installed with a multiple-running screw 4 with an impeller 5 mounted on the drive shaft 3. A nozzle 8 for solids removal and a nozzle 9 for withdrawing the liquid fraction are associated with a case.

The device is equipped with a protective device, made in the form of a cylindrical chamber 10, in which the inlet 11 and outlet 12 nozzles are mounted. The inlet 11 has a slot 13 formed in its lower part and communicates with the inlet pipeline. The outlet nozzle 12 of the shielding device is in communication with the nozzle 6 for supplying the original manure.

In the upper part of the chamber 10, a window 14 is made to remove large inclusions, which is closed by a cover 15 with a handle 16 during operation.

Case 2 is made with a height equal to twice the value of the diameter of the diameter, and the turns of the multiple auger A do not reach the upper part of the nozzle 6 for supplying the original manure.

oh oh soo

The device is equipped with a flywheel 17. The device is driven by an electric motor 18.

The screw is chosen two-bladed: the experimental data are given in Table. 1 show that with an increase in the number of blades of the screw, productivity increases slightly, while power increases dramatically. Thus, in order to reduce the power consumption of the device, the number of rotor blades should be equal to two.

The height of the auger blade is selected from the condition of ensuring the laminar mode of movement of manure in the separation chamber, due to which the operation of the installation proceeds steadily and reliably. In addition, the choice of the laminar regime is explained by the fact that the mass movement in the turbulent regime always occurs with a significantly higher energy expenditure.

In order to obtain a laminar regime, the Reynolds criterion, which determines the nature of the mass movement, is taken equal to Re 3500 and has the form

 ()

Re

V

where J2 is the diameter of the blades, m;

di - diameter of the screw shaft, m

Whereas the height of the blade is equal

 d2 -ch

PP1 M

finally we have: 1

п х У35ШП17, m

p Pn

where rj is the dynamic viscosity of the manure, - c

p is the density of manure, kg / m3; gp

p is the auger screw speed, r / s; is in the range of 8-16 rev / s.

The perforated body is made equal to twice the diameter of this body.

The experimental data obtained at the pilot plant, provided that the solid fraction is moisture in the range of 80-82% with equal perforation height and the same diameter, is given in Table. 2

From tab. 1 it follows that in order to obtain the smallest value of specific energy capacity with the same quality of the solid fraction, it is rational to choose the ratio between the diameter of the shell and its height equal to two.

The plot of the screw, equal to the height of the inlet pipe, is made without blades.

Indeed, the instantaneous position of the auger blades relative to the input mass flow of the manure is continuously changing, so that an acceleration of the rotation of the auger or its deceleration can occur. As a result, torsional vibrations of the screw occur, which adversely affect the reliability of the bearing assemblies and the entire installation as a whole.

In order to eliminate this section of the screw at the height of the inlet pipe 6, it is performed without blades.

The separation device is equipped with a flywheel in order to level out the unevenness of the dynamic load, which appears as a result of the difference in the resistance forces of the masses of manure received in the space between the blades of the auger and the impeller. Thanks to the flywheel, the operational reliability of this

0 devices. The flywheel can be combined with the impeller or pulley.

The workflow in the device proceeds as follows.

The original manure through the protective method and the supply nozzle 6 enters the perforated body 2, in which the screw 4 rotates, creating centrifugal forces. They drop the initial mass to the inner surface of the perforated case 2, forming on it a layer of solid fraction with a thickness equal to the gap between the blades of the screw 4 and the inner surface of the perforation.

Due to the presence of the axial component

5, the centrifugal force generated by the screw surface of the screw 4 is removed and transported to the solid fraction, and the liquid fraction through the layer and the perforation enters the cavity 7 and is removed through

Claims (2)

0 pipe 9 outlet of the liquid fraction. Claims 1. A device for separating manure into fractions comprising a casing in which a perforated vertical is located 5 housing with a multiple screw and impeller mounted on the drive shaft, communicated with the cavity of the housing and the inlet pipe of the source manure supply pipe connected to the skin of the outlet pipe of the solid and liquid fraction, characterized in that, in order to increase operational reliability the quality of the separation of manure, as well as reducing the energy intensity of the process, 5 it is provided with a protective device made in the form of a cylindrical chamber in which the inlet and outlet pipes are mounted, the inlet pipe has a slot made in its lower part and communicates with the supply pipe, and the outlet pipe of the protective device is in communication with the outlet pipe of the original manure, moreover, the casing is made with a height equal to twice the value of its diameter, and the turns, which are replenished at the bottom of the drive shaft wedge screw, are not reaching up to. Table 1 ///// ys / s / s // ///// /// //////////// Figure 1 the upper part of the pipe to supply the source of manure. 2. The device according to claim 1, characterized in that it is equipped with a flywheel, a set of tires 2 Fig.Z