RU2042631C1 - Device for cleaning water of mechanical impurities - Google Patents

Abstract

FIELD: water treatment. SUBSTANCE: device comprises a casing, liquid admission and discharge branch pipes, a gaseous agent admission branch pipe, a screen installed at an angle in the casing and dividing it into the above-screen and under-screen parts, and a settling hopper with a branch pipe for discharging the sediment to the lower part. Installed outside of the casing opposite each other are liquid receiving and discharge boxes. Lower end of receiving box is disposed in settling hopper so that large heavy particles contained in the liquid before is reaches the screen are separated on the turn of the liquid and fall out into the settling hopper. Owing to the liquid and foam discharge boxes with thresholds the small light particles are entrained by foam and do not get into the liquid discharge box. EFFECT: improved design. 3 cl, 4 dwg

Description

 The invention relates to a device for purifying water from mechanical impurities and can be used in the chemical or energy industry for purifying circulating water from coarse and fine particles with a specific gravity greater and less than the specific gravity of water.

A device is known that contains a housing equipped with nozzles for supplying and discharging a gaseous agent, a receiving and draining box for liquid, installed opposite the other from the housing and equipped with nozzles for supplying and discharging liquid, a horizontal grating installed in the housing dividing its space into the sublattice and sublattice parts, while both boxes are in communication with the superlattice part of the casing, and in the lower end of the sublattice part of the casing along its axis there is an additional pipe for draining the liquid [1]
However, purification of water in such devices from particles with a high specific gravity is possible only when the device operates with a strong leakage of water through the holes of the grate, which is ineffective especially in the absence of an overflow threshold. Water purification from particles with a low specific gravity is impossible, since there are no devices for separating the foam from the bulk of the water.

The closest to the invention in technical essence and the achieved effect is a device for purifying water from mechanical impurities, comprising a housing, nozzles for supplying and discharging liquid, a nozzle for supplying a gaseous agent, a grating installed with an inclination to the housing, separating it into the sublattice and sublattice parts, precipitating hopper with a nozzle for removing sediment in the lower part, while nozzles for supplying and discharging liquids are attached directly to the housing, the first of which is higher than the inclined grating, and the second others like it precipitator hopper is located outside the housing at the same level with them nadreshetochnoy communicates with the housing part via an overflow tube [2]
However, this device has a low efficiency, due to the following reasons.

 Due to the fact that the nozzles for supplying and discharging water are attached directly to the housing above and below the inclined grate, large heavy particles enter the apparatus, pass through the inclined grate and are removed through the water outlet. Water purification from large heavy particles does not occur.

 Due to the fact that the precipitating bunker is located on the outside of the casing at the same level with it and is communicated with the superlattice part of the casing using an overflow pipe, foam with trapped small light particles enters it, and since the removal pipe is located in the lower part of the precipitating bunker, then the removal of small light particles from the apparatus will be difficult, which will also lead to unreliable operation and frequent stops, since small light particles will float in the upper part of the precipitating hopper.

 The aim of the invention is the creation of an effective liquid purification from both large heavy particles and small light particles.

 To achieve this goal, in a device for purifying water from mechanical impurities, comprising a housing, nozzles for supplying and discharging liquid, a nozzle for supplying a gaseous agent, a grating installed with an inclination in the housing, separating it into the sublattice and sublattice parts, a hopper-precipitator with a nozzle for sediment discharge in the lower part, according to the invention, a receiving and drainage ducts for liquid are connected opposite to each other on the outside of the housing, communicating with the superlattice part of the housing, and a drainage duct for foam m threshold, while the lower end of the receiving housing is located in the hopper-precipitator, above which the grate is located, the drain box for liquid has an overflow threshold, the upper end of which is located below the upper end of the overflow threshold of the drain box for foam, and the nozzles for supplying and discharging liquid are connected respectively with a reception and drain boxes for liquid.

 The grill can be installed with an inclination towards the receiving box for the liquid.

 The grill can be installed in the direction of the drain box with a gap to it.

 Due to the fact that in the proposed device, a receiving box is installed, to which a nozzle for supplying liquid is connected, and the lower end of this box is placed in the precipitating hopper, large heavy particles that are in the liquid before it enters the grate are separated when the liquid is rotated and fall into silo bunker.

 Due to the fact that the proposed device has drain boxes for liquid and foam, which are equipped with thresholds, and the upper end of the threshold for liquid is located below the upper end of the threshold for foam, small light particles picked up by the foam are carried away with it and do not fall into the box for drainage of fluid.

 Figure 1 shows a longitudinal section of a device with a lattice tilted towards the receiving box; figure 2 section aa in figure 1; figure 3 is a longitudinal section of a device with a grid tilted towards the overflow threshold; in Fig.4 a section bB in Fig.3.

 A device for purifying water from impurities comprises a housing 1 with nozzles 2 and 3 for supplying and discharging a gaseous agent, respectively, a receiving 4 and drain 5 duct with nozzles 6 and 7 for supplying and discharging liquid, respectively, a grill 8 dividing the space bounded by the housing 1, to the sublattice 9 and sublattice 10 parts, the main overflow threshold 11 in front of the drain box 5, the hopper-precipitator 12 under the sublattice part 10 of the housing 1, equipped with a pipe 13, an additional drain box 14 with a pipe 15 and an additional one installed in front of it overflow threshold 16.

 The device operates as follows.

 A pipe 6 supplies circulating water containing coarse and fine particles with a large and small specific gravity (scale, welding slag, sand, dirt, wood chips from a wooden tower nozzle, etc.). Having passed through the receiving box 4, the water loses speed, and when it is rotated in the precipitating hopper 12, large particles of large specific gravity fall out of it. Next, the water enters the grating 8. A nozzle 2 feeds a gaseous agent, for example air, into the sublattice space 10, from where it enters through the openings of the grating 8 into the superlattice space 9, foaming the water. In this case, directly above the grate there is a layer of water penetrated by jets of gas. Here large particles with large specific gravity that have slipped onto the grate accumulate, which, due to the tilt of the grate, gradually slide into the precipitating hopper 12. The threshold 11 serves to create a guaranteed level of non-foamed water above the grate. Above the level of threshold 11, there is a layer of dynamic foam, which picks up small particles of large specific gravity and all particles of small specific gravity (for example, wood chips) by the flotation method, and carries them through threshold 16. The bulk of the water through threshold 11 enters drain box 5 and removed through pipe 7. An insignificant part of the water with foam and trapped particles enters through a drain 16 into a drain box 14 and is removed together with particles through pipe 15. A gaseous agent is removed from the apparatus through pipe 3.

 The main advantage of the device is the ability to effectively clean water with it from both large and small particles of large and small specific gravity while increasing the reliability of its operation.

Claims (3)

 1. DEVICE FOR CLEANING WATER FROM MECHANICAL IMPURITIES, comprising a housing, nozzles for supplying and discharging liquid, a nozzle for supplying a gaseous agent, a grill installed in the housing, dividing it into the supra and sublattice parts, a precipitating hopper with a nozzle for sediment discharge in the lower parts, characterized in that it is equipped with receiving and drainage boxes for liquid, which are installed on the outside of the body and opposite each other, communicating with the superlattice part of the body, and a drainage box for foam with an overflow threshold, while the lower torus The receiving box is placed in the precipitating hopper above which the grate is located, the drain box for liquid has an overflow threshold, the upper end of which is located below the upper end of the overflow threshold of the drain box for foam, and the nozzles for supplying and discharging liquid are connected respectively to the reception and drain boxes for liquid.  2. The device according to claim 1, characterized in that the grill is installed with an inclination towards the receiving box for liquid.  3. The device according to claim 1, characterized in that the grill is installed with an inclination towards the overflow threshold of the drain box for liquid with a gap to it.

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