FR2495491A1 - DUST COLLECTOR - Google Patents

Abstract

THE PRESENT INVENTION CONCERNS A DEDUSTER APPARATUS. THE DUST COLLECTION OR DUST COLLECTION UNIT, INCLUDES, IN A HOUSING 1 HAVING AN INPUT 2 AND AN OUTPUT 3, A MEANS 8-9 FOR SUCTING A GAS CURRENT CONTAINING DUST THROUGH THE UNIT THROUGH THE FOREGOING INLET AND OUTLET, A MEANS 5-6 FOR HUMIDIFYING THE DUST WITH WATER, A MEANS 17 FOR REMOVING THE HUMIDIFIED DUST BY FILTRATION. THIS DEVICE IS USED PRIMARILY IN UNDERGROUND SITES.

Description

Apparatus dust collector.

  The present invention relates to a dust collector apparatus for

  air especially for underground construction sites.

  The problem of underground sites such as mining is the presence of respirable dust produced for example as a result of the high-speed work of modern hacks. This dust can be dangerous for health and safety. For example,

  dust reduces the degree of visibility of

  operation, if it is not collected or disposed of

adequate.

  The object of the present invention is to provide a dedusting unit or dust collection unit that applies

  especially but not exclusively to underground

  can be mounted directly on a machine such as a coal cutting machine or located in a machine

  convenient location where it does not interfere.

  Accordingly, the present invention relates to a dust collection or dust collection unit comprising, in a housing having an inlet and an outlet, means for drawing a gaseous stream containing dust, such as air, through the unit via said inlet and outlet, a means for moistening the dust with

  water and a way to filter out the

  moistened so that air sensibly without

  dust and without water is evacuated at the exit of the unit.

  The unit of the present invention may also include a

  water collection system in which water and, where

  the dust removed from the air by the filter medium

  are collected, preferably in a sump, and extracted from the unit. This water can be recycled to be

  used to humidify the air containing dust.

  Preferably the housing has a sectional shape generally

  rectangular and its entry and exit are aligned horizontally

  zontally. The means for drawing air through the unit may be an axial fan of the type in which the airfoil of said fan is mounted to be rotated on the output shaft of an electric motor, output shaft

  which passes through the leading edge of an aerodynamic support

  hollow shaft in which the engine is housed.

  The humidifying means may be a water centrifuge of the type described in British Patent No. 1,280,239 or

  it can be a water spray system.

  The filtering means preferably comprises a filter of the fibrous, woven or mesh type such as mesh in

stainless steel.

  According to a preferred embodiment, the fan

  axial axis and the humidifying means are housed in a first

  first part of the housing, the fan motor is housed in a hollow aerodynamic support in a second part

  of the housing and the filtering means is housed in a third

part of the crankcase.

  The third portion of the housing preferably contains in series a filter for separating out important solid pieces passing through the unit, the main filter of fibrous, woven or mesh material to remove most of the dust and separate the water and a means to stop the remaining water that has passed through the main filter. The main filter can be removable and the third part of the housing can be provided with hatches or

  similar to access the filter. The traps are pre-

  watertight, the bottom of the housing may be provided with orifices to allow the outlet of the water, possibly

towards a sump.

  The unit of the present invention can be constructed as a compact unit so that it can be mounted on a machine or placed in a place where it does not interfere. The present invention will now be described in more detail in the form of an embodiment with reference to the accompanying drawings in which: Figure 1 is a general sectional view of a dust collector unit; Figure 2 illustrates a sump for the unit of Figure 1; Figure 3 is a partial side elevational view of the unit of Figures 1 and 2; Figure 4 illustrates a provision for the recycling of water and

  Figure 5 illustrates a variant of the humi-

  midification represented in the unit of Figure 1.

  With reference to FIGS. 1 to 3, reference numeral 1 denotes a casing as a whole which delimits a passage for a gaseous flow such as air, the casing 1 having an inlet 2 of generally circular shape and an outlet 3 of shape general rectangular. The outlet 3 may be provided with a part 4 for converting the rectangular section

in a circular section.

  A water centrifuge 5 of the type described in the patent

  Tannic N0 1.280.239 is mounted in inlet 2, centrifugally

  This creates a uniformly distributed web of finely pulverized water to ensure perfect humidification of the dust particles. The rotating part of the centrifuge

  water 5 supplied with water by a tube 6, is mounted on the

  output 7 of an electric motor 8 and a turbo

  9. The turbine 9 made of high-strength steel is mounted concentrically in the inlet and has aerodynamically fixed pitch fins. The hub 14 of the turbine 9 has a cylindrical portion having a bore so that it can be engaged and keyed on.

  the output shaft of the electric motor.

  The electric motor itself is fixed on an aerodynamic support

  dynamic hollow 10 by means of a vertical base plate

  11. The output shaft 7 passes through the leading edge of the

  port 10 through a suitable sealing device 12.

  The section of passage between the support 10 at its maximum depth and the upper and lower walls of the housing is preferably at least substantially equal to

  section section of the turbine 9.

  Downstream of the support 10 is placed a secondary set of mixing nozzles 16 supplied with water by a tube 30 to ensure

  additional humidification of the dust particles

  re and clean that part of the unit. After the additions

  16 is placed a metal mesh protector.

  15 to catch solids in chunks passing

through the unit.

  Following the protective device 15 is removably mounted a

  main filter panel 17 for capturing the majority of

dust particles.

  The filter 17 may be either of the fibrous type or of the stainless steel mesh type. Access to the filter 17 is

  by traps 31 waterproof water.

  The water and dust collected in this part of the unit fall into the bottom of the crankcase and, through

slots 19, in the sump 18.

  The water that has passed through the filter 17 is captured in a

  Elimination 20 which is also removable, the access being via a bolted panel 21. The water collected here falls to the bottom of the housing and is discharged to

  the sump 17 through the slots 22.

  A relatively dust-free air leaves the unit through

the exit 3.

  The aqueous sludge collected in the sump 18 can be discharged via a valve 23 or can be transferred to a recycling system via a pump 24 (see Figure 4) which can also be driven

  by the electric motor through a trans-

belt mission 25.

  Instead of the water centrifuge 25, a spraying system 26 as illustrated in the figure with swirling nozzles 27 for fine pulverization can be used, these being supplied via

driving 28.

  The dust collector unit of the present invention has

  many advantages. It can be carried out under

  small enough to be mounted on machines used in underground mining and to be

  thus able to eliminate dust near its source.

  It has been shown to be very effective because it provides good wetting of dust particles and eliminates air, 90% or more of respirable dust particles

  and it can handle air volumes irmport-ants by

wearing at his waist.

  It can be realized as an autonomous unit without any water supply and can be adapted for

recycling the water used.

  It is relatively easy to maintain because the engine

  electrical power can be kept out of the flow of air con-

  screened, access may be provided for the inspection, the net-

  cleaning and removal of the filters and the installation of an auxiliary ramp of nozzles spraying water

means of cleaning the unit.

Claims (17)

claims   1. A dust collection or dust collection unit,   characterized in that it comprises, in a housing 1 pre-   sensing an input 2 and an output 3, a means 8-9 for vacuum   a gaseous stream containing the dust through the uni-   through said inlet and outlet, a means -6 for moistening the dust with water, a means 17   to filter out the humidified dust.   2. A unit according to claim 1.   characterized in that it further comprises a system 18 for collecting water in which the water and optionally the   dust removed from the gaseous stream by means of trage 17-20 are collected.   3. A unit according to claim 2,   characterized in that it comprises a means 24 for recy-   cler the collected water to the humidifying means 5-6.   4. A unit according to any one of claims 1 to 3,   characterized in that the inlet 2 and the outlet 3 are horizontally. -   5. A unit according to any one of claims 1 to 4,   characterized in that the means for sucking air through the unit is a fan 9.   6. A unit according to claim 5, characterized in that the fan 9 is a fan   axial axis, whose wing is mounted to be rotated   on the output shaft 7 of the motor 8.   7. A unit according to claim 6, characterized in that the motor 8 is housed in a hollow aerodynamic support 10, the motor shaft passing through the leading edge of the support.   8. A unit according to any one of claims 6 and 7,   characterized in that the motor 8 is an electric motor.   9. A unit according to any one of claims 1 to 8,   characterized in that the humidifying means is a central water thief 5.   10. A unit according to any one of claims 1 to 8,   characterized in that the humidifying means is a   water spray system 27.   11. A unit according to any one of claims 1 to 10,   characterized in that the filtering means 17 comprises a   fibrous, woven or mesh type filtering material.   12. A unit according to claim 11, characterized in that the material of the filter 17 is of the stainless steel mesh.   13. A unit according to claim 8, characterized in that the axial fan 9 and the humidifying means 5 are housed in a first part of the   casing, the motor 8 of the fan being housed in a housing   hollow aerodynamic port 10 in a second part of the car-   ter and the filter means 17 in a third portion of the housing. 14. A unit according to claim 13,   characterized in that the third portion of the housing   A filter 15 is provided in series to separate solid pieces passing through the circuit, a main filter 17 of fibrous, woven or mesh material to remove most of the dust and separate the water and medium.   to capture the remaining water that has passed through the main filter.   pal. 15. A unit according to claim 14,   characterized in that the main filter 17 is removable.   16. A unit according to any one of claims 14   and 15, characterized in that the bottom of the housing has original   19-22 to allow the evacuation of water.   17. A unit according to claim 16, characterized in that it comprises a sump 18 for collect the evacuated water.