SU74175A1 - Apparatus for chemical purification of water with filtration - Google Patents

Description

The proposed apparatus is intended for cleaning and softening water.

The apparatus is shown schematically in FIG. 1 and 2 with the following designations: / - filter housing; 2 - downpipe; 3 - mixing, reaction and air release chambers; 4 - water distributor in the filter section; 5 - drainage system; 6 - recirculation line; 7 is a recirculation pump; 5- recirculation chute; 9 - overflow gutters; W-yield of purified water; 11 - lines of purified water; 12 and 13 - lines for the supply of reagent solutions to the apparatus; 14 - the line of the upper level of the contact mass; V5 and 16 — variant of withdrawal of suspensions for recirculation; 18 — drainage section of the recirculation circuit; 19 - drainage line; 20 - slots in the system of troughs water distributor 4.

The filter operates as follows.

Water and reagents flow through lines 11, 12 and 13 into the mixing, reaction and air separation chambers. The liquid mixture and precipitates precipitated are drained into the drain pipe 2, pass it and then the water distributor 4 is evenly distributed over the entire cross section of the filter.

This water dispenser consists of a battery of gutters with slit-like holes 20 in the lower part. Water, forcibly passing these gutter batteries, rises upward at an ever-decreasing rate, which greatly contributes to precipitation from it discharging under the chute and periodically removed through the drainage system 19-5.

The presence of this system allows the use of flat filter bottoms and the rejection of expensive and space-consuming conical bottoms.

Passing the slit-like holes in the gutters and climbing to the upper part of the filter, the water being treated along with the remnants of the unreacted reagents and with the precipitates interacts closely with the contact mass. The passage of this mass, the treated water reaches the overflow gutters 9 and is completely purified and the gchenn mind leaves the apparatus along line 10.

As the filter works, more and more precipitates are released in it, gradually rising upwards, seeking to fill the entire upper space. These precipitations are distribution

The height of the filter depends on the specific gravity.

At the bottom, the largest and heaviest, fully formed sediments with minimal free surface are collected. These sludges are completely spent and are no longer suitable for the water clarification reaction.

As the particles move upward, the size of the precipitation particles and their specific gravity gradually decrease and, at the same time, their adsorption-active brightening capacity increases.

The most active adsorbent is dispersed suspensions concentrated near the upper level 14 of the contact mass of the filter. It is usually these layers of the lightest suspensions that descend into the gutter to maintain the contact mass at the same level. This method of operating the filter leads to its premature depletion.

According to this proposal, the top layer of contact mass, most valuable as a strong adsorbent, is not only not lost by discharging it into the drain, but is discharged for re-work along the recirculation circuit 8, 7 and 6 or 15 and 16 (here, chute 15 and discharge section 16 are shown by a dotted line as a modification of the corresponding parts 5 and

/ 5) in the mixing and reaction chamber 3 to the raw water to be cleaned by the filter.

To prevent precipitation from rising in a weighted filter above normal level 14, the filter is blown. For this, the purge body of the drainage system 19-5, not shown in the drawing, is opened.

Recirculation of the active suspension is carried out by the action of a heat siphon or thermosyphon as it flows along the contour 15-16- / 7-21-22- 23 -3-2-1-15 (Fig. 1 and 2).

Subject invention

An apparatus for chemical purification of water by filtration, in which: the movement of water is carried out from the top down along the central tube and then from the bottom up along the main part of the tank, characterized in that the second bottom installed between the central tube and the walls of the tank in order to evenly distribute the flow of water - at its exit from the central pipe and to facilitate the creeping of sediments, for the removal of which the drainage pipes located under the gutters serve.

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