JPS6055640B2 - Leakage slurry recovery device from paper making machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a leakage slurry recovery device for a papermaking machine, and its gist is that a felt conveyor 2 for papermaking is slidably disposed on the upper surface of a suction box 1; Outflow prevention plates 4 for the papermaking slurry 3 that come into sliding contact with the papermaking slurry 3 are installed upright along the longitudinal direction at both ends of the felt conveyor 2, and receiving troughs 6 for collecting leaked slurry 5 flowing out from the felt conveyor 2 are installed on both sides of the suction box 1. A return path 7 is provided between the receiving gutter 6 and the slurry supplying section B for returning the leaked slurry 5 collected in the receiving gutter 6 to the slurry supplying section of the paper making machine A. It is in the leakage slurry recovery device of the paper making machine.

Conventionally, there was no equipment to collect leaked slurry in the deck section of the paper making machine (the part where paper is made using the felt conveyor), and the slurry was left to leak, resulting in severe material loss and contamination of the paper making machine and its surrounding equipment due to leaked slurry. It was.

The present invention has been made in view of such conventional examples, and its purpose is to provide a paper making machine that can recover leaked slurry from the decking section, prevent material loss, and prevent staining of the paper machine and peripheral equipment. The present invention provides a leakage slurry recovery device.

The present invention will be described in detail below with reference to illustrated embodiments.

The figure is a cross-sectional view of the paper making machine A cut in the direction perpendicular to the flow, with the slurry supply section B provided downstream on the front side of the paper, and the felt conveyor 2 ascending from the front side of the paper toward the back of the paper. It is arranged at an angle and is designed to slide toward the back of the page. The felt conveyor 2 is formed in the shape of an endless belt, which passes under the suction box 1 and returns from the back of the page to the front of the page, and includes a drive roll, a driven roll, and a tension roll (all of which are not shown). It is rotated by the A plurality of suction boxes 1 are arranged below the felt conveyor 2 along the longitudinal direction of the felt conveyor 2, and the felt conveyor 2 slides on the top surface of the suction boxes 1 from the front side to the back side in the paper. I'm starting to do that. Further, on both side edges of the felt conveyor 2, two outflow prevention plates are arranged parallel to each other, and a deckle packing 8 attached to the lower edge of the outflow prevention plate 4 is slid onto the top surface of the felt conveyor 2. There is. Furthermore, a receiving gutter 6 is arranged in the longitudinal direction on both sides of the suction hox 1, and a recovery hose 9 is arranged at the downstream end of the receiving gutter 6 (i.e., the end on the front side in the drawing). The discharge end of the hose 9 is connected to the slurry supply section B. Furthermore, this recovery hose 9 has a water pump 10.
is provided. However, when the felt conveyor 2 of the papermaking machine A is moved from the front side of the paper toward the back, and the pressure inside the suction box 1 is reduced, the moisture in the papermaking slurry 3 is suctioned away through the felt conveyor 2, and the fibers are removed. is deposited thickly on the felt conveyor 2.
Further, at this time, a part of the papermaking slurry 3 leaks from the side edge of the felt conveyor 2 and the sliding contact surface between the felt conveyor 2 and the deck packing 8, and this leaked slurry 5 flows into the receiving gutter 6. The leaked slurry 5 that has flowed into the receiving gutter 6 flows down to the downstream side of the receiving gutter 6 (i.e., the front side in the paper), enters the recovery hose 9, and is returned to the slurry supply section B by the hot water pump 10. . Here, the recovery hose 9 and the water pump 10 constitute the return path 7 in the present invention. Reference numeral 11 denotes a water sprinkling nozzle, which may be disposed in the longitudinal direction above the receiving gutter 6 if necessary. Water may be sprinkled into the receiving gutter 6 with the nozzle 11, and in this way, even if the leaked slurry 5 has a high concentration, it can be collected without accumulating in the receiving gutter 6. As mentioned above, the present invention collects the leaked slurry leaking from the felt conveyor section in the receiving troughs arranged on both sides of the suction box, and returns it to the slurry supply section of the papermaking machine through the return path. This has the advantage of not wasting leaked slurry and preventing material loss.
In addition, there is the advantage that the paper making machine and its peripheral equipment can be prevented from being contaminated by leaked slurry.

[Brief explanation of the drawing]

The figure is a schematic cross-sectional view of the paper-making machine according to the present invention when cut in a direction perpendicular to the felt conveyor. A is the paper-making machine, B is a slurry supply section, 1 is a suction box, 2 is a felt conveyor, and 3 is a paper-making machine. 4 is an outflow prevention plate, 5 is a leakage slurry, 6 is a receiving gutter, and 7 is a return path.

Claims (1)

[Claims] 1. A felt conveyor for papermaking is slidably disposed on the top surface of the suction box, and plates for preventing papermaking slurry from flowing out that come into sliding contact with the top surface of the felt conveyor are erected along the longitudinal direction at both ends of the felt conveyor. Receiving troughs for collecting leaked slurry flowing out from the conveyor are arranged on both sides of the suction box, and a return channel is installed to return the leaked slurry collected by the receiving troughs to the slurry supply section of the paper making machine. A leakage slurry recovery device for a papermaking machine, characterized in that it is provided between the