Efficient compact primary surface heat regenerator with low pressure loss

Abstract

The invention discloses an efficient compact primary surface heat regenerator with low pressure loss. The heat regenerator comprises a core, a shell, a flue gas inlet / outlet pipeline and an air inlet / outlet pipeline; the shell is sleeved outside the core; the flue gas inlet / outlet pipeline and the air inlet / outlet pipeline are arranged at the upper and lower ends of the shell; the core is formed by sequentially stacking a plurality of corrugated sheets; and a flue gas chamber and an air chamber spaced by layers are formed between the corrugated sheet layers. Each corrugated sheet comprises a corrugated plate and a planar plate; the corrugated plate is arranged on the planar plate, positioned in the center of the planar plate and fixed; the upper and lower ends of the planar plate are provided with a first diversion area and a second diversion area, the first diversion area is provided with a flue gas or air inlet, and the second diversion area is provided with a flue gas or air outlet; the air chamber and the flue gas chamber are formed by stacking the corrugated sheets; and the air chamber passage has no staggered included angles. By adopting the improved corrugated plates, the heat regenerator has the advantages of compact structure, high heat transfer efficiency and uniform flowing distribution of fluid, greatly reduces the flow resistance, and is difficult to scale.

Description

technical field [0001] The invention relates to a regenerator used in the technical field of gas turbines, in particular to a compact primary surface regenerator with high efficiency and low pressure loss applied to the thermal power system of the gas turbine. Background technique [0002] The gas turbine regenerator is one of the key components to improve the thermal efficiency of the gas turbine. The regenerator effectively uses the waste heat of the flue gas discharged from the turbine to heat the compressed air and then guide it into the combustion chamber, thereby improving the thermal efficiency of the device. At present, the regenerator generally adopts corrugated plates stacked staggeredly, the corrugated channels form a certain angle, the plane area between two adjacent corrugated plates is welded and sealed with side strips, and the cold and hot fluids are separated up and down at intervals. [0003] After retrieval, there are currently three representative regener...

AI Technical Summary

Problems solved by technology

However, the fluid flow distribution of the regenerator is not uniform, especially there is a "dead zone" where air and flue gas are difficult to reach at the side of the air or flue gas inlet of the regenerator. In the diversion area, there is no guide strip or Deflector, resulting in a decrease in the stiffness of the deflector area. When the pressure is high, the plane areas of adjacent plates are easily stacked together to block the entry and exit of airflow. In addition, the corrugated plates are cross-stacked, and the corrugated channel forms a 30° included angle, which causes an increase in flow resistance

The remaining two invention patents are the invention patent with the publication number CN1560437A and the invention patent with the publication number CN1696482A. The air inlet pipes of the two patents are perpendicular to the plane of the diversion area, and the corrugated plates are cross-stacked, and the corrugated channels A certain angle is formed, which not only increases the pressure loss, but also the regenerator is easy to foul and block

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