Questions about DZL boilers?

2016-04-18View Original

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How is the size of the downcomer determined for DZL boilers? How is it calculated?

Reply #22016-04-19

It is determined based on the cross-sectional area ratio of the downcomer to the upcomer, with different values for hot water boilers and steam boilers.

Reply #32016-04-19

Is it the ratio of the total cross-sectional area of all downcomers to the total cross-sectional area of all water wall tubes? What is the appropriate range for the ratio (DZL6-1.25)?

Reply #42016-04-19

We generally use 0.2 to 0.3 to calculate the ratios of downcomers to water walls for the front header and the side header respectively.

Reply #52016-04-19

Based on this calculation, for my 139 water wall tubes with dimensions of 51*3.5, 4 tubes of size 133*6 or 159*6 will suffice. Would a larger one, 159, be better?

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