Filter element

ent Britis Patent son, S.D. Hopkins,

S.A. Gei-

Removing

bel and T. Wolff. Filter element In GB 2288751 describes for use in assembly, a pleated

P.A. Mullins

a filter element an air extraction which comprises filter membrane,

The spaces between the pleats on the downstream side of the membrane are

Treatment In

GE

of gas streams

2288343

Scientific

Innovations

describes

a closed

filter

canister.

and

Ltd hollow

It comprises

gas-impermeable

end walls

a gas-permeable

side

wall. Gas contaminated liquid

is

under

pressure through and flow-restricting into the interior canister

with

sprayed

a line orifice

space

where

of the

the contami-

nants become

atomised

and

are

retained

the

side

wall.

Gas free of liquid

con-

taminants

by

passes

atmosphere.

into

becomes

In one version,

which The

and the wall is of material which wetted

with

gradually filter

water

volatilises.

canister

may

used to treat streams

be

from a

gas compressor and an associated reservoir tank. Date of publication: 1995, Inventors:

18 Oct.

A.G. Hunter

and J.L. Oakton. Pleated

filter assembly

In GB 2288746 Pall Corporation describes a filter which includes

a cylindrical

element

with

longitudinal which The each

a pair

pleats

are

other

filter

a number pleats,

has

such

of

each

of

of legs. laid

over

that

the

ieg surfaces are in intimate contact with the corresponding adjoining

surfaces

on

an

leg over the entire

height of each leg, and over a continuous region extending for at least 50% of the axial length of the filter element. An impervious endcap is connected to the first end surface of the filter element. Date of application: 1 Nov. 1995, Inventors: R.C.

Stoyell,

K.M.

air to flow freely. The invention is particularly applicable to V-pleated filters. It also provides a filter assembly. In addition, the invention provides an air extraction device comprising a filter assembly incorporating

a filter

element.

The packing may be inert or chemically reactive to treat the air. Date of application: 1 Nov. 1995, fnventor: P.A. Mullins.

William-

oxides

In GB 2288754

Air filter for IC engine In GB 2288752 Mann & Hummel

Filterwerk GmbH de-

scribes an air filter, particularly for the intake air of an internal-combustion engine. It comprises with an air filter

a housing insert ar-

ranged in it, and a cover closing off the housing. The air filter insert consists essentially of a rectangular cartridge with a surrounding seal. This seal is clamped between the housing and the cover in such a manner that it separates the unfiltered-air space from the filtered-air addition, locking

render

&

Wilcox

scribes

Company

a method

space. In elements

are provided by means of the cover fastening the housing and at the same time, fastening the cartridge to the housing. The cover is only supported on the housing in the area of the locking elements, and simultaneously the seal has a very low Shore hardness. As a result, the cover no longer rests as previously on the housing over the whole length of the seal, but only in the area of the locking elements. Date of application: 1 Nov. 1995, Inventors: E. Vo/ker and A. Klotz.

high

de-

for remov-

ing sulphur oxides from a flue gas. Particulates are removed

from

the flue

by a particulate produce of

partially

calcium-,

sodium-

or

dry

sor-

size

1.0-2.0 the

larger

gas

the

into

to react

substantially flue

produce

a

with

remove

SO3 from

cleaned

a

than

pm, is injected

flue

and

with

the

and

sorbent.

unreacted

The

dry

flue

to a wet scrubber removal

produce

dry

be provided sired

is then

of SOP, to

cleaned

Sufficient

flue

sorbent

amounts

up reagent

a make-

may be provided

dry

both

the

the

remove

reacted dry

and

sorbent

substantially

flue

gas,

make

dry

reagent

the

sorbent

the

SOs-free

flue

gas to produce gas. 1 Nov.

D.W.

and

SOP from

substantially

tion:

with

the cleaned

Date

of applicaP.A.

Bhat

and T.R. Goots. Dewatering

mineral

forms

a

temperature.

process

The

is repeated

more

times

in

two or

order

to

desalt the slurry to a desired level of purity. Date of application:

15 Nov.

Inventor:

1995,

P.E. Adler. media for filtration,

GB

2289524

Wonders

Ltd

filtration,

mass

Wooden

describes

heat

exchange

It

comprises

tus. having

a

exchange apparaa tank

an inlet and an outlet

and a mass of buoyant floatable members in tank.

A means

for passing

or the

is provided

fluid through

tank. The buoyant

the

or floata-

ble members serve as a filter and/or a contact surface for heat or mass transfer for two The

or more

buoyant

or

members

should

take

form

the

pebbles. tration

fluids. flexible

preferably of

A process and/or

exchange

wooden for

utilises

apparatus.

fil-

mass or heat the

Date of applica1995, Inventor:

C. Hadfield. Air filter assembly !n

GB

2287664

AC

Delco

Systems Overseas Corporation describes an air filter for filtering air passing

1995, Inventors:

Johnson,

colloidal

It then

tion: 22 Nov.

unreacted

react

the

flue

for

The make-up

and

remove

the

sorbent

as a reagent

SOP removal.

unfrom

SOS-free

and

unreacted available

dry

to wet

sorbent,

reacted

de-

of SO3 and

to the wet scrubber the

gas. may

to remove

and

dis-

ensures that the slurry remains flowable at the ele-

or

substantially gas

a

water,

concentrated slurry. The amount of water removed

In

S03-free the

salts

particles.

the

to

conveyed for

solved

at a

remove

heat or mass exchange

substantially

and

of

Wooden

SOS-free flue gas containing reacted

to

oortion

partially

gas,

flowaole.

centrifuged

speed

vated

amount

60, preferably

particle

to

cleaned

magnesium-based bent

gas

collector,

flue gas. A sufficient

the slurry

It is then

the Babcock

SOa. Alternatively,

the

the gas is air contaminated with water, cellulosic

filled with a porous solid packing, with the packing sufficiently dense to prevent the pleats from collapsing as air is drawn through, yet sufficiently porous to permit

Process

sulphur

from fiue gas

slurry

into the engine or passenger compartment of an automotive vehicle. It in-

a

process for defining, dewatering and desalting a slurry

cludes a sheet of pleated filter material, a moulded urethane foam seal for sealing the filter within the housing of the air intake

of a mineral fine kaolin. initial step

such as ultraIt includes the of forming a

system, and a prefilter secured to the filter element so as to filter air prior to the

In GB 2289269 ploration

dilute,

NL

Venture

Ex-

describes

flocculated

aqueous

slurry containing mineral particles, water and one or more salts, a portion of the mineral particles being colloidal particles. The flocculated, dilute

slurry

is heated

to an elevated temperature, to dissolve the salts and

passage of air to the filter element. The prefilter collects and holds particles which would otherwise clog the filter element and reduce its operating life. Date of publication: 27 Sep. 1995, Inventors: S.W. Kemp and c. Cosby.