| 摘要 |
<p>A steam generator provided with a combustion chamber or gas heated, of the type having a feed water preheater or economizer. A branch-off line equipped with a throttling element communicates a branch-off point between the economizer and the evaporator with the feed water tank. The temperature sensing device near the branch-off point is arranged to govern the amount of feed water flowing through the preheater to prevent steam formation in the economizer. Compared with known prior art, the generator according to the invention improves fuel utilization and is less expensive to produce.</p> |
