摘要:
The invention relates to an arrangement for cleaning, airflow control and where appropriate pushing away melt in air ports of recovery boilers within the paper and pulp industry. By inclining the regulating device (10) at an angle to the horizontal plane and at the same time making the piston of the regulating device run in contact with the side and upper walls (24a, 24b) and, respectively, (22) of the air port, optimum airflow control and a more compact installation can be achieved. The airflow can be adjusted more rapidly with a small regulating movement at the same time as very good penetration of the air into the furnace (4) is achieved. The regulating device is allowed to penetrate into and down into the furnace so that the regulating device can push away any melt/slag in the event of a high level of melt (3) in front of the opening (30) of the air port into the furnace (4).
摘要:
A blower for a high efficiency furnace is provided with an increased interior space for accommodating an impeller of maximum practicable diameter. The blower includes a blower motor and a blower housing having a bottom piece and a top piece assembling with the bottom piece to define an interior of the blower housing. The top piece includes an annular lower support portion for supporting the blower motor and an annular upper portion extending above and around the lower portion. The upper portion has an outer peripheral edge and lugs extending outward beyond the outer peripheral edge. The lugs have lug holes to receive mechanical fasteners to secure the blower housing to an external device. The head of the mechanical fasteners are positioned above the lugs on the upper portion of the top piece. In this arrangement the diameter of the bottom piece is not limited by a need to accommodate spacing for the head of the mechanical fastener. Additionally, the top piece and bottom piece have interlocking internal seals that provide positive engagement when the blower housing is assembled.