| 摘要 |
PCT No. PCT/DE83/00006 Sec. 371 Date Sep. 21, 1983 Sec. 102(e) Date Sep. 21, 1983 PCT Filed Jan. 19, 1983 PCT Pub. No. WO83/02658 PCT Pub. Date Aug. 4, 1983.The invention relates to a process and to a heat exchanger (8) intended in particular for performing the process, for operating a high-pressure boiler (1), having consuming units (3', 3'', 3''') connected to the high-pressure boiler (1), the condensate from which units is returned to a condensate tank (5). By means of a feed water pump (7), feed water is fed to the boiler (1) and the condensate and the feed water are then fed to a heat exchanger (8) upstream of the condensate tank (5). According to the invention, the hot condensate is fed to the free space of the heat exchanger (8), and the feed water which is to be heated is pumped to the heat exchanger (8), passed helically from the cold to the warm zone in the heat exchanger (8) and carried from the heat exchanger (8) into the boiler (1). As a result of this heating up of the feed water, the heat contained in the condensate becomes economically useable, resulting in substantial savings in heat medium for the boiler. The invention also relates to a heat exchanger (8), comprising a tank (5) with a pipeline disposed therein for one medium and a connection for the second medium. The process according to the invention and the apparatus according to the invention are particularly advantageously applicable to boiler installations for dry-cleaning establishments, laundries and so forth. |
