RU2375314C1 - Method of cleaning of liquids and utilisatoion of magnetic slimes and device for its implementation - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: method includes passing of cleaned liquid through magnetic separators with following dewatering of slime products. Liquid purification is implemented on pressure magnetic separators of closed type, and cleaned liquid is collected in tank-collector and it is used in the capacity of cleaning fluid for purification of pressure magnetic separators of closed type against slime. Received slime is thickened in magnetic separator of open type and fed to dewatering. Liquid extracted during dewatering of slime product is directed into tank of magnetic separator of open type and cleaned in magnetic separator of open type flushing liquid - into pressure magnetic separator of close type. Device includes source of liquid pollution by magnetic inclusions, which by means of pump and pipeline of liquid supply is connected to as minimum two pressure magnetic separators of close type. Pressure magnetic separators of close type by means of pipelines and slide valves are connected to tank-collector and magnetic separators of open type which is by means of conveyor is connected to filter of dewatering.

EFFECT: upgrading of liquids purification, reduction of cost price of cleaning, power inputs, reduction of device's overall dimentions.

5 cl, 1 dwg

Description

The invention relates to the field of magnetic cleaning of process fluids (TFA), cutting fluids (coolant), washing solutions and can be used in metal processing industries for metal forming, cutting and rolling.

A known method of magnetic liquid separation, implemented by the device "Magnetic filter - separator" (see AC No. 915897. Cl. B01D 35/06, B03C 1/00. Publ. March 30, 1982, Bull. No. 12), which consists in that magnetic inclusions are removed from the liquid by deposition of the latter on magnetic rods located coaxially with the movement of the liquid being cleaned, and regenerative flushing of the magnetic inclusions deposited on the magnetic rods is carried out by the fluid pressure directed perpendicularly to the magnetic rods from pipes located coaxially around the gnithic rods.

The reasons that impede the achievement of the technical result indicated below when using the known method include the fact that the liquid being cleaned is separated in the filter housing in a turbulent mode, which significantly reduces the quality of its cleaning, and the regenerative flushing of magnetic inclusions deposited on the magnetic rods is carried out by the fluid pressure directed perpendicular to the magnetic rods of pipes arranged coaxially around the magnetic rods, is ineffective due to the fact that the main stream itself is regenerative liquid in the housing is directed downward coaxially with the magnetic rods. In this case, the main flow of the regeneration fluid changes the flushing force vector, and thus the removal of magnetic inclusions from the magnetic rods is not completely ensured.

It should be noted that in the case of using the cleaned liquid itself as a regeneration liquid, the problem arises of further purification of the regeneration liquid, thickening and dehydration of the sludge product, which is not solved in the frame of the indicated copyright certificate.

In addition, the design of the known device does not allow the use of powerful magnets, magnetic rods of considerable length, and also to arrange magnetic rods close to each other, since magnetic forces due to different polarity contribute to the attraction of magnetic rods to each other, and ultimately "sticking together »Them among themselves.

A more efficient way to clean the liquid and thicken the slurry product is solved in the device "Magnetic separator" (see patent No. 2207913. Cl. B01D 35/06, B03C 1/00, C10M 175/04. Publish. July 10, 2003 Bull. No. 19), which consists in the fact that the removal of magnetic inclusions from the liquid is carried out by the deposition of magnetic particles from the liquid on magnetic cartridges, followed by the removal of sludge from the magnetic cartridges using sludge removal elements into the conveyor.

The operation of such a device showed that the efficiency of cleaning liquids from magnetic inclusions increases with increasing concentration of inclusions in the liquid, i.e. The well-known magnetic separator works efficiently with liquid contaminants from 1.0 g / dm ³ or more, which is not always the case in cleaning systems.

These circumstances drastically reduce the quality of the cleaning fluid and limit the performance of the cleaning device.

The essence of the invention lies in the fact that the liquid is cleaned in pressure magnetic separators of a closed type (NMSZT), and the purified liquid is collected in a storage tank and used as a washing liquid to clean the NMSZT from sludge, the resulting sludge is concentrated in an open type magnetic separator (UITP) and served for dehydration. The liquid released in the process of dewatering the sludge product is sent to the UHMW tank, and the washing liquid purified in the UHMW is sent to the NWSS.

A device for implementing a method for cleaning liquids and disposing of magnetic sludge is connected, as a rule, to a source of liquid contamination by magnetic inclusions, and then, through a pump and a liquid supply pipe, is connected to at least two NMSZT, which, in turn, are connected to the tank through pipelines and valves -accumulator and MOT, which is connected via a conveyor to a dehydration filter. The dehydration filter through a pipeline is connected to the MOTO tank, which, in turn, is connected through a pipeline to the liquid supply pipeline to the NMSZT.

The storage tank by means of a pump and pipelines is connected to the source of contamination of the liquid by magnetic inclusions and through an adjustable valve is connected to the NMSZT.

Using the proposed invention provides the following technical result: improving the quality of cleaning liquids, reducing the cost of cleaning, including energy consumption, reducing the size of the device.

The specified technical result in the implementation of the invention is achieved by the fact that the proposed method includes passing the cleaned liquid through magnetic separators, followed by dehydration of the sludge product.

The peculiarity lies in the fact that the liquid is cleaned in a NSCW, and the purified liquid is collected in a storage tank and used as a washing liquid to clean the NSCW from sludge, the resulting sludge is concentrated in the UHMWF and fed to dehydration. The liquid released in the process of dewatering the sludge product is sent to the UHMW tank, and the washing liquid purified in the UHMW is sent to the NWSS.

A device for implementing a method for cleaning liquids and disposing of magnetic sludge, including magnetic separators, a dehydration filter, a storage tank, a conveyor, pipelines, valves, pumps.

The peculiarity lies in the fact that the source of liquid contamination by magnetic inclusions through a pump and a liquid supply pipe is connected to at least two NMSZTs, which, in turn, are connected to the storage tank and the MOTS via pipelines and valves, which is connected to the dehydration filter via a conveyor. The dehydration filter through a pipeline is connected to the MOTO tank, which, in turn, is connected through a pipeline to the liquid supply pipeline to the NMSZT.

The storage tank by means of a pump and pipelines is connected to the source of contamination of the liquid by magnetic inclusions and through an adjustable valve is connected to the NMSZT.

The analysis of the prior art by the applicant, including a search by patents and scientific and technical sources of information and identification of sources containing information about analogues of the claimed invention, allowed to establish that the applicant did not find an analogue characterized by features identical to all the essential features of the claimed invention. The definition from the list of identified analogues of the prototype as the closest in the set of essential features of the analogue made it possible to identify the set of essential distinguishing features in relation to the applicant's technical result in the claimed invention set forth in the claims.

Therefore, the claimed invention: a method and apparatus for its implementation meets the condition of "novelty."

A design of the invention that implements the claimed method is presented in the drawing.

The device includes:

- liquid purification unit - A,

- block thickening slurry product - B,

- sludge product dewatering unit - B.

The device for cleaning liquids and disposing of magnetic sludge consists of closed magnetic pressure separators (NMSZT) 1, open magnetic separator (MOTS) 2, dehydration filter 3, storage tank 4, conveyor 5, pumps 6, 7 and 8, valves 9, 10, 11, 12 and 13, a source of liquid contamination - for example, a rolling mill 14, oil tanks 15 and sludge 16, pipelines 17 ... 22.

The device operates as follows.

In cleaning mode. The liquid contaminated with magnetic inclusions from the rolling mill 14 by pump 6 through the valve 17 through the valves 10 is pumped into the housing of the NMSZT 1. Flowing through the separator in the laminar motion mode through gratings drawn from magnetic rods, the liquid is cleaned of magnetic inclusions by sticking magnetic particles to the magnetic rods . The liquid purified in the NMSZT 1 through the valves 12 through the pipeline 18 is discharged into the storage tank 4, from where it is pumped through the pipeline 19 to the rolling mill 14.

In device flushing mode. With the accumulation of magnetic sludge on the magnetic rods in NMSZT 1 there is a need for washing NMSZT. In this case, the valves 10, 12 are closed and the valves 9, 11 of one of the NMSZT 1 open (the rest of the NMSZT operate in the cleaning mode). In addition, the valve 13 opens, and the cleaned liquid from the storage tank 4 is pumped through the pipeline 20 under pressure 20 to the NMSZT 1 body. The liquid pumped into the NMSZT 1 body (being from this moment a washing liquid) in a turbulent mode flushes the magnetic the sludge is discharged through the pipe 21 into the tank of MOTO 2. It should be noted that the concentration of sludge in the washing liquid at this moment is 10-100 times higher than the concentration of sludge in the liquid being cleaned during the cleaning process. In addition, due to the short washing time (1-2 min), the volume of drained washing liquid in the MOTO 2 tank is insignificant, thereby the MOTO 2 capacity is 30-60 times lower than the total capacity of the NMST 1.

After flushing NMSZT 1, the valves 9, 11, 13 are closed and the valves 10, 12 open.

The mode of cleaning the washing fluid and thickening the sludge product.

In this mode, in the UITF 2 tank, the washing liquid is cleaned of magnetic sludge using magnetic rods and a bottom conveyor (for the operation of the device, see "220"). The removed sludge is discharged onto the conveyor 5, and the foreign oil is discharged into the tank 15. The cleaned flushing fluid through the pipe 22 with the pump 8 is periodically pumped into the pipe 17 for cleaning in the NMSZT GNMS 1.

Thus, a closed fluid purification system is proposed.

Sludge product dehydration mode. From the conveyor 5, the sludge is discharged into the dehydration filter 3, from where with a moisture content of 25-35% to the tank 16. The flushing fluid squeezed out of the sludge is discharged through the pipe 23 into the MSOT 2 tank.

The use of the proposed cleaning device in the first stage NMSZT 1 with a laminar mode of operation improves the quality of cleaning.

The absence of pumps between the cleaning, thickening and dewatering units reduces the cost of cleaning, including energy costs.

The proposed arrangement of cleaning, thickening and dewatering devices reduces the overall size of the system.

Thus, the foregoing description indicates the fulfillment of the following set of conditions when using the claimed invention:

- a tool embodying the claimed invention, in its implementation is intended for magnetic cleaning of process fluids (TJ), cutting fluids (coolant), washing solutions and can be used in metalworking industries for metal forming, cutting and rolling;

- for the claimed method in the form as described in the claims, the possibility of its implementation using the means and methods described in the application is confirmed;

- a tool embodying the claimed invention in the implementation, is able to ensure the achievement, seen by the applicant, of the technical tasks. Therefore, the claimed invention meets the condition of "industrial applicability".

Claims (5)

1. The method of purification of liquids and disposal of magnetic sludge, including passing the cleaned liquid through magnetic separators followed by dewatering of the sludge product, characterized in that the liquid is cleaned in pressure magnetic closed separators (NMSZT), and the purified liquid is collected in a storage tank and used it as a washing liquid to clean the NSCW from sludge, the resulting sludge is concentrated in an open magnetic separator (UHMWT) and fed to dehydration. 2. The method according to claim 1, characterized in that the liquid separated in the process of dewatering the sludge product is sent to the UHMW tank, and the washing liquid purified in the UHW is sent to the NWSS. 3. A device for cleaning liquids and disposing of magnetic sludge, including magnetic separators, a dewatering filter, a storage tank, conveyor, pipelines, valves, pumps, characterized in that the source of liquid contamination by magnetic inclusions through a pump and a liquid supply pipe is connected to at least two NMSZT, which, in turn, are connected via pipelines and valves to the storage tank and MOT, which is connected via a conveyor to the dewatering filter. 4. The device according to claim 3, characterized in that the dewatering filter is connected via a pipeline to an MOTO tank, which, in turn, is connected via a pipeline to a liquid supply pipeline to a NMSZT. 5. The device according to claim 3, characterized in that the storage tank by means of a pump and pipelines is connected to a source of liquid contamination by magnetic inclusions and is connected to a NSCW through an adjustable gate valve.

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