DE8314231U1 - CENTRIFUGAL FORCE FILTER WITH SCREEN INSERT - Google Patents

Description

Serhard Bodendorfer '. , ' ",. * ,,. * ' ·. ''"' 75o5 Ettlingen 4 Engineer VDI Mittelbergstr. 23

CENTRIFUGAL POWER FILTER WITH SCREEN INSERT Field of use;

The invention relates to a bypass flow filter, in which a targeted and controllable pre-separation of the impurities in the main flow by centrifugal force in channels that are threaded around a screen body (f ₂ ' ^f ₃ > ···) / ^the main separation of a partial flow by a filter insert with a self-cleaning effect ( Item 3) and the residual separation of the very fine particles in a sludge separation room (f) takes place.

Areas of application are, for example: cleaning of contaminated product flows in shaft seals or intermediate bearings of centrifugal pumps, cleaning of liquids and gases in the industrial sector, etc.

Purpose:

In the presence of contaminated. In the industrial sector, cleaned partial flows are often required for special purposes. It depends on the highest possible degree of separation of the solids of all grain sizes and low clogging of the filter. The purpose of this invention is to improve and optimize these characteristics.

State of the art:

It is known that the following products have so far been used to meet these requirements: Straight-through filter (in the main stream)

- Dq loo % of the filter strot is passed through the filter, it tends to become clogged, as the filtered product collects in the filter.

- 100 % of the fine impurities that are in the product and that can pass through the sieve due to the size of the mesh are removed from the cleaned product.

- A differential pressure monitor and a reserve filter with the appropriate fittings are required for reliable operation.

Zyclone (bypass)

- Require high differential pressures for a good degree of separation

- Wear quickly with abrasive dirt particles, as they are for a

good degree of separation a high peripheral speed of the product need in the cyclone room.

- Can clog with products with a high solid content.

- Do not have a good degree of separation with fine impurities.

- Only work with solid particles with a higher specific weight than the liquid.

- Depending on the spec. Weight of the solid particles greatly different degrees of separation.

Self-cleaning filters (in the bypass flow)

The self-cleaning filters available on the market lead the main flow to a point of lower pressure and branch off the cleaned product in the secondary flow. For the use for shaft seals and bearings of centrifugal pumps, this filter version requires a main current of Io - 2o times higher than my invention, so that the self-cleaning effect of the sieve is achieved. This amount reduces the efficiency u ^f * d leads to energy losses. Solid particles that pass through the sieve are not separated out. A targeted and controllable pre-separation of the solids does not take place.

task

The invention is based on the object of freeing contaminated liquids and gases with a higher degree of separation than before from their contaminants while at the same time maintaining freedom from clogging, low maintenance and economic efficiency.

solution

This object is achieved according to the invention in that the contaminated main flow is passed into thread-like channels around a sieve insert (item 3). This creates a stratification of the contaminants in the channels Cf ^ f ₃ ..) due to the existing centrifugal forces. The sieve insert (item 3) itself thus receives a pre-cleaned product. The effect of the pre-cleaning can be influenced by the specific shape and size of the channels. The sieve openings are kept free by the turbulent flow in the vicinity of the sieve insert (item 3). The guide tube (item 4) calms down the cleaned partial flow passing through the sieve insert (item 3) and relieves it! .with: l'iniparous flow downwards

in the sludge separator (f), where the fine particles are

can settle. The partial flow of the main flow Q, enriched with solids, leaves the filter at Q and has to go to a point lower pressure (usually the suction side of centrifugal pumps).

In the case of solids that have a higher specific weight than the liquid (or the gas), the thread-like channels are arranged around the outside of the sieve insert (item 3). In the case of solids that have a lower specific gravity than the liquid (or the gas), the thread-like channels are arranged on the inside of the sieve insert (item 3).

Achievable benefits

The advantages that can be achieved with the invention are that:

a) by the flow velocity in the thread-like shaped Channels exerted a centrifugal force on the solid particles which keeps them away from the sieve surface. This results in a pre-cleaning of the contaminated product and the degree of separation of the filter is increased

b) the sieve insert (item 3) through the surrounding flow and its Turbulence is cleaned and thus works self-cleaning,

c) in the sludge separator (f, -) through the sieve insert (item 3) fine solid particles passed through to a large extent are separated, whereby the overall degree of separation is further increased,

d) the filter is very low-maintenance and works reliably,

e) the invention contributes to the fact that the dangerous products The environment is less polluted.

f) Larger solids (up to 7 mm diameter) and sometimes also textile thread can pass through the filter without clogging it.

g) the filter has the high differential pressure even if there is a small differential pressure Does not lose the degree of separation,

h) the effect of the filter through the design and shape of the channels can be adapted to the different requirements of soiled products.

description An exemplary embodiment is shown in drawing 46 005-4

and is described in more detail below. It means:

β = contaminated main stream

Q = partial flow enriched with impurities (Return to the point of lower pressure)

Q = cleaned partial flow

Part 1

^; Part 2 K Part 3 (| Part 4; ^r Part 5 Part 6

Filter cover Filter body Sieve insert

Guide stirrer

seal Housing screws Distribution room for main stream

f., £., ...: thread-like shaped channels (n-thread) Sludge separator Sludge discharge opening

f_: sludge separation room

The contaminated main flow enters the distribution room f at "Q".

ο ι

a. There the flow becomes single or multi-threaded Channels f_, f ... distributed. The predeterminable flow velocity prevailing in these channels causes:

a) Enrichment of the outer flow threads with the existing dirt particles, which have a higher spec. Have weight than the liquid or gas, due to centrifugal forces.

b) One part of the flow flows around the filter insert Pos. The flow is in the area of the filter insert pos. 3 in the turbulent area and prevents the filter openings from being clogged.

c) A predeterminable partial flow of the main flow, which has been pre-cleaned by the centrifugal forces, passes through the sieve openings of the sieve insert Pos. 3 into space f

d) The guide tube Pos. 4 calms the cleaned partial flow and leads the now laminar flow downwards. This removes the very fine residual dirt particles that are still present through the filter due to the existing hole, slot or mesh size, in

• - "5 -

Sludge separating chamber (f} of the filter separated. The accumulated Mud can be drained through the mud drain hole "E".

e) The partial flow cleaned in this way leaves the filter at "Q."

f) The partial flow enriched with impurities leaves the filter at "Q".

g) The ratio between the partial flows Q. and Q can be predetermined and can be adapted to requirements.

Claims (2)

Claims 1. Zer.trifugalkraftfilter with sieve insert (pos. 3), with a Pre-separation of the impurities by centrifugal force, filtering of a pre-cleaned partial flow through a Filter insert, separation of the residual contamination in an integrated dirt separator. Identifying part (according to No. 46 oo5-4) Claim 1 is characterized in that: - on the outside of a sieve insert (item 3) thread-like shaped channels (f ₂ ' ^f ^ etc.) are arranged, - the channels tangential with an inlet opening (Q) and one Outlet opening (Q} are connected, - The interior of the filter has a guide tube (item 4), the filter has a sludge drain
drain opening (E). - the filter has a sludge separation room (f, -) and a sludge Subclaim 2. centrifugal force filter with sieve insert according to claim 1, characterized by: (not shown) - thread-like shaped channels on the inside of the sieve insert ; the channels are tangentially, radially or axially connected to the inlet opening Q and the outlet opening Q;