US 12,018,860 B2
Integrated pressure condensing boiler
Guoling Ye, Langfang (CN); Xijun Zhang, Langfang (CN); Hui Ye, Langfang (CN); Qing Ye, Langfang (CN); Bing Zhang, Langfang (CN); Xin Zhao, Langfang (CN); Guolei Wang, Langfang (CN); Weidong Yao, Langfang (CN); Jianzhong Wu, Langfang (CN); Yimin Wu, Langfang (CN); and Liang Du, Langfang (CN)
Assigned to Langfang Jinhua Boiler Co., Ltd., Langfang (CN)
Filed by LANGFANG JINHUA BOILER CO., LTD., Langfang (CN)
Filed on Jul. 6, 2022, as Appl. No. 17/858,837.
Application 17/858,837 is a continuation of application No. PCT/CN2021/112442, filed on Aug. 13, 2021.
Claims priority of application No. 202110809174.2 (CN), filed on Jul. 16, 2021.
Prior Publication US 2023/0027757 A1, Jan. 26, 2023
Int. Cl. F24H 8/00 (2022.01); F24H 1/46 (2022.01); F24H 9/00 (2022.01); F24H 9/16 (2022.01); F24H 9/1832 (2022.01)
CPC F24H 8/006 (2013.01) [F24H 1/46 (2013.01); F24H 9/0005 (2013.01); F24H 9/16 (2013.01); F24H 9/1832 (2022.01)] 18 Claims
OG exemplary drawing
 
1. An integrated pressure condensing boiler comprising:
a pressure-bearing housing;
a combustion chamber arranged in the pressure-bearing housing;
a heat-exchange furnace arranged in the pressure-bearing housing communicating with the heat-exchange furnace; and
cooling tube groups fixed in the heat-exchange furnace;
wherein
the pressure-bearing housing is provided with a flue gas outlet pipe, a heat-exchange medium inlet and a heat-exchange medium outlet, wherein the flue gas outlet pipe is configured to communicate with the heat-exchange furnace;
heat-exchange medium flows upward in the pressure-bearing housing and in the cooling tube groups, and exchanges heat with high-temperature flue gas flowing downward in the heat-exchange furnace, thereby achieving a counterflow heat exchanging;
the heat-exchange furnace comprises a multi-stage heat-exchange chamber that includes heat-exchange chambers with each heat-exchange chamber being cylindrical, two adjacent heat-exchange chambers are configured to communicate with each other through a flue gas turning channel, and each heat-exchange chamber comprises a cooling tube group of the cooling tube groups vertically arranged within;
the heat-exchange chambers are arranged one upon another from top to bottom, such that the high-temperature flue gas diffuses from a center part of a heat-exchange chamber to a periphery of the heat-exchange chamber and gathers from a periphery of an adjacent heat-exchange chamber of the heat-exchange chamber to a center part of the adjacent heat-exchange chamber, the adjacent heat-exchange chamber being under the heat-exchange chamber, and in each heat-exchange chamber, the high-temperature flue gas laterally scouring the cooling tube group arranged in each heat-exchange chamber;
the heat-exchange medium is driven upward to enter each cooling tube group in a heat-exchange chamber and exchange heat with the high-temperature flue gas in the heat-exchange chamber, and to discharge from an upper part of each cooling tube group and mix with the heat-exchange medium that in the pressure-bearing housing and outside the heat-exchange chambers;
each heat-exchange chamber comprises a cylindrical peripheral wall, an upper tube plate and a lower tube plate, wherein the upper tube plate and the lower tube plate are hermetically connected with the peripheral wall, thereby enclosing an inner cavity of each heat-exchange chamber;
the upper tube plate is provided with a flue gas inlet, and the lower tube plate is provided with a flue gas outlet;
the flue gas outlet of a bottom-most heat-exchange chamber of the multi-stage heat-exchange chamber is arranged at the peripheral wall of the bottom-most heat-exchange chamber, and is configured to communicate with the flue gas outlet pipe;
a first heat-exchange chamber of the multi-stage heat-exchange chamber is configured to communicate with the combustion chamber, and a second heat-exchange chamber of the multi-stage heat-exchange chamber is configured to communicate with the first heat-exchange chamber;
the flue gas inlet of the first heat-exchange chamber is a first flue gas inlet arranged in a center part of the upper tube plate of the first heat-exchange chamber, and the flue gas outlet of the first heat-exchange chamber is a first flue gas outlet arranged close to a peripheral wall of the first heat-exchange chamber;
the flue gas inlet of the second heat-exchange chamber is a second flue gas inlet corresponding to the first flue gas outlet, and the flue gas outlet of the second heat-exchange chamber is a second flue gas outlet arranged in a center part of the lower tube plate of the second heat-exchange chamber;
the second flue gas outlet is used to communicate with a third heat-exchange chamber or communicate with the flue gas outlet pipe provided on the pressure-bearing housing; and
the high-temperature flue gas enters the first heat-exchange chamber from a center part of the first heat-exchange chamber and diffuses to a periphery of the first heat-exchange chamber, the high-temperature flue gas enters the second heat-exchange chamber from a periphery of the second heat-exchange chamber and gathers to the second flue gas outlet arranged at the center part of the lower tube plate of the second heat-exchange chamber, thereby laterally scouring the cooling tube group in the second heat-exchange chamber.