RU2106178C1 - Device for continuous automatic filtering of liquids - Google Patents

Abstract

FIELD: filtering of various liquids, aggressive, easily flammable and explosive ones inclusive, applicable in various branches of industry. SUBSTANCE: the device uses a filter, ejector, compressed air line, additional pipeline whose upper part is connected to the ejector passive nozzle through a pipeline, and the lower part is dipped in a vessel with filtered liquid, and pipelines with control cocks. The intake pipe of the additional pipeline is installed above the liquid level it is connected through the filter and pipeline to the vessel with liquid to be filtered. EFFECT: simplified design, reduced cost of manufacture and enhanced reliability of operation. 1 dwg

Description

 The invention relates to the field of filtering various liquids, including aggressive, flammable and explosive, and can be used in various industries.

 A device is known (ed. St. N 850139, class B 01 D 29/60, 35/12, priority from 1981), including a filter, an intermediate tank, an ejector and a coupled float valve located in an additional tank. The intermediate tank is connected through a pipeline to the lower filter chamber and to the galvanic bath with a hose, which can easily be transferred to similar containers. Adjusting valves and vacuum gauges for measuring vacuum are provided.

 The ejector is connected to a compressed air source by a pipeline and to a ventilation system. The lower chamber is equipped with a float valve. The upper and lower chambers are connected by a filter partition.

 The installation works as follows: when compressed air passes through the ejector in the additional and intermediate containers and in the lower filter chamber, a vacuum is created by which liquid is pumped from the galvanic bath through the hose to the intermediate and additional container, the two-way valve rises and opens the lower valve, through which the liquid is drained through the pipeline into the upper filter chamber.

 The liquid passes through the filter baffle and enters the lower chamber of the filter, from where it flows through the float valve into a galvanic bath.

 When the intermediate and additional tanks are filled with electrolyte, the float valve in the intermediate tank floats up and closes the upper valve, preventing the filtered fluid from entering through the ejector into the ventilation system. If there is no electrolyte in the tanks, the float valve goes down, closes the bottom valve and stops the communication of these tanks with the atmosphere.

 The float valve installed in the lower filter chamber plays the same role. A float valve installed in its upper chamber prevents overflow of liquid into it.

 The disadvantages of this device include the complexity of the design. It contains intermediate and additional tanks, interconnected with the filter by pipelines, and three float valves, so the manufacturing cost and its unreliability in work are high.

 The closest in technical essence is the device (RF patent N 2069074, CL B 01 D 29/60, 35/12, priority from 12/27/93). It contains a vacuum filter with an upper chamber and a filtrate chamber, separated by a mesh partition with filter elements. As the latter, filter cloths, paper, etc. can be used.

 An additional pipeline is mounted vertically and fixed in a container filled with filtered liquid, connected in its upper part by a pipeline with a passive nozzle of the ejector. Compressed air is connected to the active nozzle from the compressed air line. The drain pipe of the vacuum filter is connected by a pipe to the top of this additional pipe. The liquid to be filtered is fed into the upper chamber of the vacuum filter through a pipeline, and a float valve is installed in its upper chamber to prevent overflow. Pipelines are equipped with control valves.

 The lower end of the drain pipe of the vacuum filter is installed above the liquid level, which the suction force of the ejector can raise in it. And the lower end of the additional pipeline is immersed in a container with filtered fluid.

 The device operates as follows. Before starting work, close the taps in the auxiliary pipe and the drain pipe, open the valve in the pipe through which the liquid to be filtered is introduced into the upper chamber of the vacuum filter. Then open the valve in the compressed air line. Compressed air, passing through the ejector, creates a vacuum in the additional pipe and filter filtrate chamber.

 Filtration is initially carried out using a vacuum filter. After filling the filtrate chamber with filtered fluid, it is manually drained using a crane in the drain pipe into a container for filtered fluid. After filling it, they switch to continuous automatic filtering. To do this, close the tap in the drain pipe and open it in an additional pipe. Under the influence of atmospheric pressure, the liquid from the drained tank fills the additional pipeline to a certain height. This lift height depends on the suction force of the ejector and the density of the liquid. The filtered liquid from the chamber of the filtrate of the vacuum filter installed above the tank into which the filtered liquid is drained will merge into the upper part of the additional pipeline and from it into the drained tank.

 The disadvantage of this device is that the liquid that needs to be filtered, enters the upper chamber of the vacuum filter through the pipeline, and this requires a pump with a drive and a float valve that prevents overflow of liquid. All this complicates its design and increases the manufacturing cost, and the float valve is often clogged, which causes the filtered fluid to overflow into the upper chamber of the vacuum filter, which reduces the reliability of this device.

 The purpose of the invention is to simplify the design of the device, reduce the cost of its manufacture and increase reliability in operation.

 This goal is achieved by the fact that the intake pipe of the additional pipeline is installed above the liquid level, which the suction force of the ejector can raise in it, is connected through the filter and pipelines to the container and the liquid in it, which must be filtered.

 This allows you to refuse to use in the device a pipeline through which the liquid intended for filtering is supplied to the upper chamber of the vacuum filter and from the float valve, which simplifies the design of the device, reduces the cost of manufacture and increases its reliability.

 This is the novelty and significant differences of the proposed device.

 The drawing shows a device, General view. It contains a filter 1 with a suction hose 2 mounted on the pipe 3 of the vertical additional pipe 4, which is installed above the liquid level, which can be lifted by the suction force of the ejector 5, connected through its passive nozzle 6 by a pipe 7 to the top of this additional pipe 4, and its lower part - with a container 8 with filtered liquid 9. In the tank 8 there is a pipeline 10 for draining the filtered liquid from it. And to the ejector 5, through the compressed air line 11, compressed air is supplied. In all these pipelines and pipeline 4 there are control valves 12.

 The intake hose 2 is installed in a container 13 with a liquid 14. which must be filtered. This tank is installed above the tank 8.

 The device operates as follows.

 Before starting work, close the valve 12 in the auxiliary pipe 4 and open in the compressed air line 11. Compressed air, passing through the ejector 5, creates a vacuum, vacuum, in the additional pipe 4, with which the liquid 13 under the influence of atmospheric pressure, passing through the filter 1 will merge into this pipeline. After filling it with filtered liquid, open the valve 12, pour it into the container 8 and switch to automatic operation. Under the influence of atmospheric pressure, the liquid from the tank 8 fills the pipeline 4 to a certain height. This height depends on the suction force of the ejector and the density of the liquid. And the liquid 13 from the tank 14 installed above the tank 8, passing through the filter 1, will merge into an additional pipe 4, and from it into the tank 8, from which it can be diverted through the pipe 10.

 Adjusting the operation of the device is carried out using valves 12. At the end of the operation, it is necessary to close the valve 12 in the compressed air line 11. The choice of materials from which the device is made is determined by the properties of the liquids to be filtered.

Claims (1)

 A device for continuous automatic filtering of liquids, containing a filter, an ejector, a compressed air line, an additional pipeline, the upper part of which is connected by a pipe to a passive nozzle of the ejector, and the lower one is immersed in a container with filtered fluid, pipelines and control valves, characterized in that the intake pipe of the additional a pipe installed above the liquid level, which the suction force of the ejector can raise in it, is connected through the filter and pipelines to the container and liquid feature in it that needs to be filtered.