RU2482070C1 - Apparatus for treating fat-containing waste water - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to equipment for treating fat-containing waste water and can be used at meat-processing plants, at public catering places for separating emulsions at temperature of 5-40°C. The apparatus has a cylindrical housing 1 with a coaxially lying hollow shaft 2, a perforated plate 4 on which an adsorbent 5 is placed, a cover 6 with holes for feeding the adsorbent, a pipe 8 for outlet of spent adsorbent, an overflow pipe 9, a bottom 10 with a pipe 11 for outlet of clarified liquid. A nozzle 3 for feeding contaminated liquid is placed perpendicular to the shaft 2 and is in form of tubes whose ends are bent at a right angle in a direction opposite the rotation of the shaft 2 through energy of the liquid flowing out of the nozzle. The length of the nozzle 3 increases from top downwards. Spent adsorbent is removed during rotation of the shaft 2 which is driven by an electric motor.

EFFECT: invention enables to intensify the waste water treatment process and reduce power consumption with maximally possible use of the adsorbent and bring food industry effluent in line with discharge regulations.

2 dwg

Description

The invention relates to equipment for the treatment of fat-containing wastewater. The device can be used in meat processing plants, catering establishments and other food industry enterprises for the separation of emulsions with a temperature of 5 to 40 ° C.

Known oil centrifugal filter separator used for the purification of oil liquids, consisting of a cylindrical body with a spherical cover and a bottom, filled with adsorbent. This device is intended for the purification of oily liquids by separating pre-heated emulsions by constantly mixing the adsorbent used. However, the complexity of the design leads to significant material costs in its manufacture, in addition, the operation of such an installation requires large energy costs (RU 2321547 C2).

A device for the separation of water-oil emulsions, containing a cylindrical body, a vertical pipe for entering the emulsion, made in the form of a perforated pipe. The inner space of the cylinder is filled with filter material, which is a combination of synthetic fibers of various structures. The emulsion passes through the adsorbent layer, the purified liquid exits through the side mesh walls, and the oil phase is discharged through the upper pipe (RU 2361640 C2). However, this design has a small performance. An additional challenge is the recovery of contaminated multilayer filter media.

The closest in technical essence and the achieved result is a device for purifying water from oil products. The installation comprises a vertical cylindrical body, a pipe for supplying water to be purified from oil products, a compressor, a pipe for supplying air, a pipe for removing oil products, a pipe for removing purified water. Inside the casing is installed a swirl made in the form of radial blades mounted at an angle to the axis of the casing in its lower part. A microporous plate is installed between the air supply pipe and the swirl. The disadvantage of this design is the long cleaning time due to the insignificant mass transfer surface and the presence of a “wall effect”. Also, difficulties are caused by unloading the spent adsorbent (RU 2337065 C1).

The objective of the invention is the intensification of the wastewater treatment process and reducing energy consumption with the maximum possible use of adsorbent and bringing the effluent of food industry enterprises to discharge standards.

The problem is solved in the proposed device for the treatment of fat-containing wastewater of food industry enterprises, including a cylindrical body, inside of which a hollow shaft for supplying contaminated liquid and a perforated plate on which the adsorbent is placed, a cover with a hole for loading clean adsorbent, a nozzle for unloading waste adsorbent, overflow pipe for draining excess liquid, a bottom with a nozzle for draining clarified liquid, which, according to the invention y, additionally contains nozzles for supplying contaminated liquid perpendicular to the shaft and made in the form of tubes bent at the end at a right angle in the direction opposite to the expected rotation of the shaft due to the energy flowing from the nozzles of the liquid, while the length of the nozzles increases from top to bottom, and the discharge of the spent adsorbent is carried out by rotation of the shaft, driven by an electric motor.

A sufficient degree of purification is achieved by increasing the mass transfer surface between the contaminated liquid and the adsorbent by constantly mixing and using the energy of the liquid flowing out of the nozzles. The nozzle ends are bent at right angles to create the maximum reactive force required to rotate the hollow shaft. The length of the nozzles increases from top to bottom to increase the mass transfer surface and minimize the near-wall effect.

At the end of the cleaning cycle, the supply of contaminated water stops and, accordingly, the rotation of the hollow shaft is stopped, therefore, for unloading the spent adsorbent, it is driven by an electric motor through a V-belt transmission.

The proposed device is illustrated in the drawing. 1 shows a main view and a sectional view.

A device for cleaning greasy wastewater includes a cylindrical body 1, inside of which a hollow shaft 2 is coaxially located, nozzles 3 for supplying contaminated liquid, perpendicularly mounted on the shaft 2 and made in the form of tubes bent at the end at a right angle in the direction opposite to the expected rotation of the shaft due to the energy of the liquid flowing out of the nozzles, while the length of the nozzles increases from top to bottom, the perforated plate 4 on which the adsorbent 5 is placed, the cover 6 with an opening 7 for loading clean adsorbent, pipe 8 with a flap for unloading the spent adsorbent, overflow pipe 9 for draining excess fluid, the bottom 10 with pipe 11 for draining clarified liquid. In the upper part of the shaft 2, a wheel 12 is fixed for a belt connection with an electric motor.

The proposed device operates as follows.

Contaminated water is supplied to the housing 1 through a hollow shaft 2, through which it is distributed in a perpendicularly mounted nozzle 3 and gives it a rotational movement around its axis. This contributes to the mixing and uniform use of the adsorbent 5. The process of cleaning the liquid. The clarified water passes through the holes of the perforated plate 4 and is discharged through the nozzle 11 of the bottom 10. Excesses of the supplied contaminated liquid are discharged through the overflow pipe 9 to the waste storage tank (not shown in the diagram). At the end of the cleaning cycle, the supply of contaminated water is stopped, the hollow shaft 2 is stopped, the damper on the nozzle 8 is opened. An electric motor is turned on (not shown in the diagram), which drives the shaft 2 to mix the adsorbent 5 used by V-belt transmission. During mixing, it is discharged through nozzle 8. After unloading the contaminated adsorbent 5 through the hole 7 of the cover 6 is loaded with a clean adsorbent. The cleaning cycle is repeated.

The small number of working elements and the simplicity of their design do not cause large material costs in the manufacture of this installation. The presence of a shaft that constantly mixes the filter load allows us to solve several problems: unloading the spent adsorbent for subsequent regeneration through a special pipe, reducing the influence of the “wall effect”.

Claims (1)

A device for the treatment of fat-containing wastewater from food industry enterprises, including a cylindrical body, inside of which a hollow shaft for supplying contaminated liquid and a perforated plate on which the adsorbent is placed, a cover with a hole for loading clean adsorbent, a nozzle for unloading the spent adsorbent, an overflow pipe for removal of excess liquid, the bottom with a pipe for draining clarified liquid, characterized in that it further comprises nozzles for supplying contaminated liquids perpendicularly mounted on the shaft and made in the form of tubes bent at the end at a right angle in the direction opposite to the expected rotation of the shaft due to the energy flowing from the nozzles of the liquid, while the length of the nozzles increases from top to bottom, and the spent adsorbent is unloaded when the shaft rotates driven by an electric motor.