JPS6129445Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is a method for removing floating matter and suspended solids contained in wastewater.
Relating to a device for separation of precipitates.

In various applications, wastewater must be purified of its contaminants. Particularly in the case of circulating water supplies required in industrial processing or treatment processes, rapid and complete purification of process water is important. This is especially difficult when the wastewater contains particles not only of different sizes but also of different densities. An example of this is the waste water generated in car body painting shops, which contains abrasive particles as well as especially paint particles. Prior to purification, this wastewater is treated with a coagulant that coagulates the paint particles into larger aggregates. Coagulation takes place in a chamber through which the wastewater flows horizontally. At the end of the chamber the particles are collected by the sloping bottom and are continuously discharged from there. The water flowing under the bottom, especially the water containing smaller particles or particles that are difficult to coagulate or do not coagulate at all, is sucked through a further fine screen before the return pump. This screen very often gets clogged and must be cleaned when the equipment is shut down.

This invention solves the problem of providing a device which avoids the operational interruptions forced by this clogging and which also allows flexible adaptation to wastewater with highly variable volumes and degrees of pollution. The solution to this problem is to have a large number of chambers arranged at different heights on the outlet side and whose flow cross-section can be controlled, such that the wastewater flows through horizontally and, by reducing the flow rate, flotation and settling actually occur. It consists in having an exit. Indoors, laminar flow can be generated by adjusting various cross-sections at the outlet. Therefore, for example, if the generation of floating particles is predominant, the top water layer can be withdrawn preferentially relative to the other water layers.
If the sedimentation material grows, it is advantageous to remove an additional layer near the bottom to increase the velocity and prevent the sedimentation material from settling out. The chamber, which is always required for this process, can, according to the concept of the invention, have a width that gradually decreases towards the bottom of the chamber.

The device according to this invention makes it possible to separate the filth that collects in the flow bed according to its properties and to direct it to a number of screen devices adapted to these properties. These screen devices are thereby substantially less occlusive. The possibility of individual control of the discharge ports and the piping arranged at each discharge port are as follows:
Furthermore, even if the water level in the room fluctuates, it is possible to always guide the solids to the appropriate screening device. So that solid particles, once moved to a certain height in the chamber based on their density, are not moved upwards or downwards in the discharge area due to different flow velocities prevailing upwards or downwards. According to the idea of another embodiment of the invention, a horizontally extending separating plate can be arranged at the outlet to prevent the cross flow.

The longitudinal cross-sectional view shows that the chamber 1 has an inlet 2 with a baffle plate 3 located approximately one third below the chamber 1, and an outlet 4, 4' arranged at approximately equal distances above and below on the outlet side.
4'', 4. In the discharge zone 1', the discharge openings are screened from one another by horizontal plates 5, 5', 5''. The horizontal plate extends approximately the same width as the discharge zone 1' which gradually narrows in width in the direction of the discharge outlet. The lowest section 1'' of the chamber reaching the lowest horizontal plate is somewhat reduced in cross-section by side slopes 11, 12. Outlets 4, 4',
4'', 4 are screen devices 8, 8', 8'', 8 arranged in parallel on the same horizontal plane via control valves 6, 6', 6'', 6 and pipes 7, 7', 7'', 7.
It is connected to the. Between the pipes there are further connecting pipes 9, 9', 9'', which make it possible to feed the water/solids mixture exiting from a particular outlet to an adjacent screen device.

In this embodiment, the screen device, which is formed as a drum screen passing from the outside to the inside, removes the solids stored outside with one scraper and one scraper.
The clean water is discharged through the respective chutes 10, 10', 10'', 10, while the clean water is collected in a sump 11, from where it is suctioned by a pump 13.
This leads to reuse.

In operating conditions, in which the chamber is normally filled to an upper limit 14, particles exposed to flotation or settling during the flow through collect at a certain height. The chamber volume is also divided into several layers 15, 1 whose flow rate can be controlled differently through the adjustment of control valves 6, 6', 6'', 6.
It can also be divided into 5', 15'', and 15. The screen devices arranged in various ways can drive the optimum separation efficiency. If the liquid level in the room is , the particles that would otherwise be found in the highest layer 15 collect in the second layer 15', which is the uppermost layer in this case. connecting pipe 9,
9', 9'' is nevertheless this top layer 1
5' to the rearmost screen device 8 whose gap width or sieve width is tuned to this group of particles. This requires another shutoff valve, which is not shown in the drawings for the sake of simplicity. Instead of having two sloped surfaces 11, 12 and a horizontal surface, the chamber floor can also have the shape of an acute V or U-shape or a combination of both. The purpose of such a shape is in any case an effort to prevent the settling of sediments within the room, which are discharged in a further sorted form and subsequently separated by screening devices. be done.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of one embodiment, and FIG. 2 is a cross-sectional view of the same. Symbols in the figure: 1...chamber, 4, 4', 4'', 4...exhaust port.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A wastewater system having a chamber through which wastewater flows horizontally and a screen device to which the wastewater taken out from the chamber is supplied, such that floating and settling occur due to a decrease in the flow velocity. In a device for removing contained dirt, the chamber 1 has a number of outlets 4, 4', 4'', 4 with a controllable flow cross section arranged at different heights on the outlet side, and
a screen device 8 adapted to the characteristics of the waste discharged from each outlet 4, 4', 4'', 4;
8′, 8″, 8 are connected to the outlet. 2. The device according to claim 1, in which the width of the chamber 1 is larger than the outlet 4 in the discharge end region 1′. , 4', 4'', 4. 3. In the device according to claim 1 or 2 of the utility model registration, the discharge ports 4, 4', 4", 4 are provided with separating plates 5, 5', 5" extending horizontally in the discharge end region 1'. A device characterized by: 4 In the device according to claim 3 of the utility model registration, the separation plates 5, 5', and 5'' are respectively connected to the discharge port and
4′, 4″, 4. 5. The device according to claim 1 of the utility model registration, at least the lower part 1 of the chamber 1 opposed to the sediment. ″ has a width that gradually decreases toward the bottom of the chamber.