SU926185A1 - Device for cleaning sand trap from deposit - Google Patents

Description

one

The invention relates to the field of wastewater purification from mineral impurities and can be used in various sectors of the industry whose wastewater contains undissolved mineral inclusions.

The closest in technical essence and the achieved result to the proposed is a device for cleaning sand traps from sediment, including an open tray at the bottom of the sand trap with sediment flush piping lines fitted with GP nozzles adjacent to the tray walls.

A disadvantage of this device is the use of a large amount of wash water, the high humidity of the discharged sediment, and the sedimentation of sediment due to the formation of zones of rupture of water jets due to the presence of resistance during the transportation of sand through the tray.

The purpose of the invention is to save wash water and reduce the moisture of the discharged sediment.

The goal is achieved in that the device is provided with metal positive and negative electrodes installed along the tray.

We will take a positive electrode that has the shape of a groove and is installed at the bottom of the tray, while the negative one is made in the form of a set of round rods located at a distance not less than the diameter of the rod, and mounted above the positive electrode.

FIG. 1 shows a device

15 view from above; in fig. 2 shows section A-A in FIG. one.

Claims (2)

The device includes an open tray 1 made at the bottom of the sand trap with sludge washes 2, provided with adjoining adjoining walls of the tray and IB nozzles 4 with nozzles 3 directed to the side. (not shown). The lower (positive) 5 electric genus has the shape of a groove, and the upper (negative) 6. made in the form of round rods with a diameter of 3-5 cm, spaced from each other at a distance of at least the diameter of the rod. The distance between the negative 6 and the positive 5 electrodes is between 30 - 0 cm. The device works as follows. At the preparatory stage of the operation, the sediment deposited on the bottom of the sand trap creeps toward tray 1, the passage through the openings between the rod electrodes 6 fills the interelectrode space. At a certain level of sediment in tray 1, pipelines 2 supply water, which flows through the nozzles into the tray, where the expansion and transition of the sediment from a dense stationary state to a fluidized one occurs. Thereafter, the water supply is stopped. The main stage of the device operation is the supply of high voltage to electrodes 5 and 6. Under the action of a constant electric current, a film of water located in close proximity to the electric power supply begins to self-propel. A local stream is formed along the electrodes in the total rest of the fluidized bed of sediment. The velocity of water in the near-electrode area, depending on the polarity of the electrodes (it is much higher at the anode), causes a decrease in pressure and sediment leakage into the total flow of the moving mixture, which is directed to the sand trap. The flow rate at the negative electrode 6 for the purpose of eliminating the sedimentation of sediment is minimal. This is achieved by a certain current density, which is caused by the distance between the rod electrodes 6 (not less than the diameter of the rods). The width of the cavities between the rod electrodes 6 also takes into account the prevention of their clogging by sediment. 5 The device allows you to remove sediment from the sand trap without disconnecting it from work and without violating the established modes of operation. The use of the proposed invention will allow saving up to 90 Wash water washing technology, reducing the moisture of the discharged sediment from 99 to 96-97, i.e. reduce the volume of subsequent sludge dewatering facilities (for example, seals 3 times, and also exclude the possibility of sediment agitating due to the nonsignificant flow rates of the mixture at the negative electrodes. other products of production. Claim 1. Devices for cleaning a sand trap from sediment, including an open tray at the bottom of the sand trap with pipelines yva precipitate stocked adjacent to the walls of the tray and directed toward at microamperes nozzles, characterized in that, in order to save the washing types and reducing moisture discharged sludge is provided with a tray mounted along the positive and negative metal electrode. 2. The device according to claim 1, that is, that the positive electrode has the shape of a groove and is installed at the bottom of the tray, and the negative is made as a set of round rods spaced from each other at a distance not less than the diameter of the rod, and above the positive electrode. 1 Sources of information taken into account during the examination 1. USSR author's certificate No. 29671, cl. C 02 C 1/36, 02.03-71. X S. 6 I / T 17 Ib HS / / / FIG.