RU2069074C1 - Device for continuous automatic filtration of liquids - Google Patents

Abstract

FIELD: continuous automatic filtration of liquids, including aggressive, easily inflammable and combustible liquids. SUBSTANCE: device has vacuum filter with upper chamber and filtrate chamber, ejector, compressed air main, pipe lines for feeding the liquid to upper chamber, reservoir for draining filtered liquid and adjusting cocks fitted in pipe lines; provision is made for mounting additional pipe line whose upper portion is connected with ejector passive nozzle by means of pipe line. Lower end of drain branch pipe of vacuum filter is mounted above level of liquid which may be raised by suction force of ejector. Lower end of additional pipe line is immersed in reservoir filled with filtered liquid. EFFECT: enhanced efficiency. 1 dwg

Description

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

 The closest in technical essence is a device for AS N 850139, CL B 01 D 29/60, 1981, comprising a filter, an intermediate tank, an ejector, and a twin float valve housed 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, with the help of 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, therefore, the high cost of manufacture and its unreliability in operation.

 The technical result of the proposed device is to simplify its design, lower manufacturing costs and increase its reliability.

 In FIG. 1 shows a General view of the device.

 It contains a vacuum filter 1 with an upper chamber 2 and a filtrate chamber 3, divided by a mesh partition 4 with filter elements 5. As the latter, filter cloths, paper, etc. can be used.

 An additional pipe 8 is mounted vertically in the tank 6, which is filled with filtered liquid 7, and an additional pipe 8 is connected in its upper part by a pipe 9 with a passive nozzle 10 of the ejector 11. Compressed air is connected to the active nozzle 12 from the compressed air line. The drain pipe 14 of the vacuum filter 1 is connected by a pipe 15 to the upper part of the pipeline 8. The fluid to be filtered is supplied to the upper chamber of the vacuum filter through the pipe 16. A float valve 17 is installed in the upper chamber to prevent overflow. In the tank 6 is a pipe 18 for draining from the tank of the filtered liquid. The pipelines are equipped with control valves 19.

 The lower end of the drain pipe 14 of the vacuum filter is installed above the liquid level, which can be raised in it by the suction force of the ejector. The lower end of the additional pipe 8 is immersed in a container with filtered fluid.

 The device operates as follows.

 Before starting work, close the control valves 19 in the pipe 8 and in the drain pipe 14. Open the valve 19 in the pipe 16 and bring the liquid to be filtered into the upper chamber 2 of the vacuum filter. Then open the valve 19 of the compressed air line 13. Compressed air passing through the ejector creates a vacuum in the pipe 8 and the filtrate chamber 3.

 Initially, the filtering is carried out using a vacuum filter after filling the filtrate chamber with the filtered liquid, it is manually drained using a valve 19 in the drain pipe 14 into a container 6. After filling, they switch to continuous automatic filtering. To do this, close the valve 19 in the pipe 14 and open the valve 19 in the pipe 8. Under the influence of atmospheric pressure, the liquid from the tank 6 fills the pipe 8 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 3 of the vacuum filter 1 installed above the container 6 will be discharged into the upper part of the pipeline 8 and from it into the container 6, and then through the pipe 18 the liquid will be discharged from the container 6.

 Adjustment of the operation of the device is carried out using taps 19. After the work is completed, it is necessary to close the taps 19 in pipelines 16, 13 and 8. The choice of materials from which the device is made is determined by the properties of the liquid to be filtered. Such materials may be: vinyl plastic, polyethylene, ftoroplast, etc.

 This device simplifies the design, reduces its cost and increases the reliability of its operation.

Claims (1)

 A device for continuous automatic filtering of liquids containing a vacuum filter with an upper chamber and a filtrate chamber, between which filter elements are installed, an ejector, a compressed air line, pipelines for supplying fluid to the upper chamber, in which a safety valve, pipelines and control valves are installed, and a tank for draining filtered liquid into it, characterized in that an additional pipeline is vertically installed in the device, the upper part of which is connected by a pipeline at the same time with the passive nozzle of the ejector, while the lower end of the drain pipe of the vacuum filter is installed above the height of 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 liquid.