CS245335B1 - Pumping equipment for liquefying liquids - Google Patents

Abstract

The device is particularly suitable for aerating wastewater in activation tanks. It consists of a pump and a diagonal impeller with a channel distributor, 2 to 8 nozzles, suction chambers with air supply and outlet diffusers. The nozzles, suction chambers and outlet diffusers are connected to the axial openings of the channel distributor. The entire pump device is supported by a support pipe, in which there are holes for water supply and a sliding bearing. The support pipe is attached to the support plate of the pump device, in which there is a rolling bearing. The device is more efficient in aerating activation tanks than the devices used so far and ensures better use of oxygen as a result of the movement of air bubbles from the bottom of the tank to the surface, as well as better mixing of the tank volume and maintenance of sludge in buoyancy.

Description

245335 3 4

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump apparatus for aerating liquids suitable for aerating wastewater in an inactivation tank.

When aerating the water, it is especially used for wastewater treatment and water treatment! spit types of aeration equipment. These are mainly surface aerators, ejector aeration devices and the like.

Surface aerators have a number of disadvantages. This is particularly complex and heavy-duty, resulting in significant failure rates when rotating. Other disadvantages include the unevenness of aeration of the activation tanks, the high level of equipment noise, the investment costs and the aerosolization of the aeration waste water with the surrounding air, with the consequent expansion of the germs into the surrounding environment and health. endangering operators and eye-populations. The operation of the ejector devices is conditioned by the use of a pump as a source of pressure line. Thereby, the device consists of two separate elements connected together by pipes. The ejector itself has a relatively low efficiency and, in addition, additional losses are generated in the feed line through the pump, so that the overall efficiency of the device is very low. At the same time, this aeration device does not provide sufficient agitation in the entire tank volume.

Aerating devices that use compressed air also have a number of drawbacks. Those that operate at low air pressure create large bubbles, which causes little use of air oxygen. On the other hand, those that make fine bubbles use the air oxygen better, but need high air pressure to push through the airborne mass. and energy-intensive. They also have other shortcomings such as clogging of the porous mass, the need to use a high speed blower, which deteriorates the noise environment.

The above described drawbacks are largely prevented by the pump system for aerating the water, suitable especially for aerating the waste water in the activation tanks, consisting of a pump with a diaphragm with a channel distributor, 2 to 8 nozzles, suction chambers by air inlet and outlet diffusers according to the invention.

SUMMARY OF THE INVENTION The nozzles, suction chambers and outlet diffusers are connected directly to the axial openings of the channel distributor, the entire pump device carrying a support tube in which the water inlets and the sliding bearing are provided. The support is supported by the supporting end of the pump device, in which there is a rolling bearing.

The water stream emerging from the channel distributor through the axial openings is accelerated in the nozzles and air is drawn in at the end of the nozzles as a result of the pressure drop. The output diffusers ensure a reduction in the speed of the water-air mixture and its supply to the various locations of the tank. Their shape can be chosen by the tank sublayer. The aeration device is clamped above the surface at the top of the reservoir and supported by a support tube in which water inlets to the pump inlet are open. The size of the openings prevents the penetration of larger solids than the throughput of the device. The arrangement of the aeration device with a diagonal pump type compared to the devices used to aerate the wastewater treatment activator bins shows higher efficiency, better oxygen utilization due to the movement of air bubbles from the bottom to the bottom, better mixing of the ob -jem tank and keeping the sludge in the float. An example of a particular embodiment of the invention is shown in the drawing, where a schematic drawing is shown in a sectional view, which passes through the pumps. The basic element of the aeration device is a diagonal pump, the hydraulic part of which is the impeller 1, the channel distributor 2 and the suction disc 3. Nozzles 5, aeration chambers 6 and outlet diffusers 7 are connected to the 8 - 8 axial openings 4 of the channel distributor. The separate air supply to each suction chamber is by means of pipes 8 which exit above the water level. A support tube 9 is welded and ribbed to the pump suction disc, in which there are holes 10 for supplying waste water to the pump inlet. The pump shaft 11 is guided in a sliding bearing 12 located in the support tube and in a roller bearing 13 located in the support plate 14 of the device. The impeller is clamped by the nut 15, the torque transmission by the tongue 18 and the axial force is transferred to the roller bearing by means of a nut 17. The space behind the impeller is sealed by the lid 18.

The water emerging from the impeller 1 is directed by the channel distributor 2 of the doaxial openings 4, from which the nozzles 5t flow at the end of which, due to the increase in speed and pressure reduction, air is drawn out of the suction chambers. reducing the speed of the water mixture and the air to the bottom of the tank.

Claims (1)

SUBJECT Water aeration pump device suitable, in particular, for the aeration of waste water in activation tanks, consisting of a pump with diagonal impeller with channel distributor, 2 to 8 nozzles, air intake chambers and outlet diffusers, characterized in that the nozzles (5), suction chambers (6) a OF THE INVENTION outlet diffusers (7j) are directly connected to the axial openings (4) of the channel distributor (2), wherein the entire pump device is supported by a support tube (9) in which the water supply openings (10) and the plain bearing (12) are it is attached to a bearing thatch (14) of the pump device in which the roller bearing (13) is mounted.