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1. (WO2018065185) A SYSTEM AND A METHOD FOR COLLECTING AND HANDLING DUST IN A PAPER-MAKING ENVIRONMENT
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CLAIMS

1. A system (1) for collecting and handling dust in a paper- making environment wherein the system (1) comprises ; a source of underpressure (2); an elongated collector (4) that extends along a longitudinal axis and which elongated collector (4) is connected to the source of underpressure (2) through at least one suction duct (7) such that underpressure can be generated inside the elongated collector (4), the elongated collector (4) having an inlet (5) through which dust-laden air can enter the elongated collector (4) and an exit opening (6) leading to the suction duct (7) through which exit opening (6) dust-laden air can be evacuated from the elongated collector (4); a source of water (8) connected by at least one water supply duct (10) to the elongated collector (4) such that water from the source of water (8) can be introduced into the elongated collector so that dust in the dust-laden air can be exposed to and mix with the water introduced into the elongated collector (4), characterized in that a flow meter (12) is functionally connected to the system (1) to measure at least one of a flow of water from the source of water (8) to the elongated collector (4) or a flow of water exiting from the elongated collector (4) through the exit opening (6) of the elongated collector (4) and arranged to send a signal indicating a numerical value for a flow of water that reaches or leaves the elongated collector (4) such that this value can be compared to a predetermined minimum value.

2. A system according to claim 1, wherein the inlet (5) of the elongated collector (4) is disposed in such a relation to the longitudinal axis of the elongated collector (4) that upon drawing the dust-laden air into the elongated collector (4), an air vortex is induced with the dust-laden air wherein the induced air vortex flows between the collector inlet (5) and the collector exit opening (6).

3. A system according to claim 1, wherein at least one pump (9) is arranged to feed water from the source of water (8) through the at least one supply duct (10) to the elongated collector (4).

4. A system according to claim 1, wherein the flow meter (12) is arranged to send the signal to a display (13) that indicates the current value of the flow of water that reaches or leaves the elongated collector (4) such that a human operator can compare that value to the predetermined minimum value.

5. A system according to claim 1, wherein the flow meter (12) is connected to a logic control unit (14) and arranged to send the signal to the logic control unit

(14) , the logic control unit (14) being arranged to be able to control at least one of the source of underpressure (2) or a control valve (15) in the suction duct such that the logic control unit (14) is capable of reducing the underpressure that is generated inside the elongated collector (4) and the logic control unit (14) being set to reduce the underpressure that is generated in the elongated collector (4) when the signal from the flow meter (12) indicates that the flow of water is below a predetermined value.

6. A system according to claim 5, wherein the source of underpressure (2)

comprises a fan (3) and the logic control unit (14) is connected to the fan (3) and set to reduce the action of the fan (3) when the signal from the flow meter (12) indicates that the flow of water is lower than the predetermined minimum value.

7. A system according to claim 6, wherein the logical control unit (14) is set to completely interrupt the operation of the fan (3) when the signal from the flow meter (12) indicates that the flow of water is lower than the predetermined minimum value.

8. A system according to claim 6, wherein the flow meter (12) is placed in the water supply duct (10) that leads from the source of water (8) to the elongated collector (4).

9. A system according to claim 5, wherein the system (1) comprises a control valve

(15) located in the suction duct (7) and connected to the logical control unit (14) such that the logical control unit (14) can control the action of the control valve (15) and wherein the logical control unit (14) is set to activate the control valve (15) to reduce underpressure in the elongated collector (15).

10. A system according to claim 8, wherein the logical control unit (14) is set to completely interrupt the connection between the source of underpressure (2) and the elongated collector (4).

11. A method of collecting and handling dust in a paper-making environment

wherein the method comprises: providing a source of underpressure (2);

providing an elongated collector (4) that extends along a longitudinal axis and connecting the elongated collector (4) to the source of underpressure (2) through a suction duct (7) such that an underpressure is generated inside the elongated collector (4) that draws dust-laden air and into the elongated collector, the elongated collector (4) having an inlet (5) through which dust-laden air can enter the elongated collector and an exit opening (6) leading to the suction duct (7) through which exit opening (6) dust-laden air can be evacuated from the elongated collector (4), supplying water to the elongated collector through a water supply duct (10) connected to the elongated collector (4) such that water is introduced into the elongated collector (4) and mixes with the dust in the dust- laden air and leaves the elongated collector (4) through the exit opening (6) so that there will also be a flow of water leaving the elongated collector (4), characterized in that the method also comprises measuring at least one of the flow of water in the supply duct (10) or the flow of water leaving the elongated collector (4) and comparing the measured flow to a predetermined minimum value.

12. A method according to claim 11, wherein the method additionally comprises reducing the underpressure that is generated in the elongated collector (4) if the measurement indicates that the flow of water is lower than a predetermined minimum value.

13. A method according to claim 11, wherein the generation of underpressure in the elongated collector (4) is interrupted completely if the measurement indicates that the flow of water is lower than a predetermined minimum value.