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Boiler comprising water cooling system for variable-section hearth

A water-cooling system and technology in the furnace, which is applied in the boiler field, can solve the problem that the variable-section furnace cannot adopt the spiral tube water cooling system, and achieve the effect of simple structure

Active Publication Date: 2012-07-18
SHANGHAI BOILER WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a boiler including a water cooling system used in a variable-section furnace to overcome the defect that the variable-section furnace cannot use a spiral tube as a water cooling system in the prior art

Method used

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  • Boiler comprising water cooling system for variable-section hearth
  • Boiler comprising water cooling system for variable-section hearth
  • Boiler comprising water cooling system for variable-section hearth

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Embodiment Construction

[0020] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.

[0021] Such as Figure 4 and 5 As shown, the boiler comprising the water-cooling system used in the variable-section furnace of this embodiment includes a lower front wall 101, a lower rear wall 102, and a side wall 103. The lower front wall 101, the lower rear wall 102 and the side wall 103 The lower hearth 100 is enclosed. The lower front wall 101 extends upwards to form an upper front wall 201 , the lower rear wall 102 extends upwards to form an upper rear wall 202 , and the upper furnace 200 is surrounded by the upper front wall 201 , the upper rear wall 202 and the side walls 103 . The lower furnace 100 is divided into a transition zone 111 , a lower furnace 112 and an ash hopper 113 from top to bottom. The lower front wall 101, the lower rear wall 102, the side wall 103, the upp...

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Abstract

The invention discloses a boiler comprising a water cooling system for a variable-section hearth. The boiler comprises a lower hearth and an upper hearth, the lower hearth is divided into a transitional area, a lower hearth body and an ash hopper from top to bottom, lower front and back walls, side walls and upper front and back walls are film walls, pipes and flat steel are combined to form the film walls, the water cooling system consists of spiral tubes and vertical tubes corresponding to the spiral tubes one by one, and the film walls of the lower hearth completely or partially consist of spiral tubes. The water cooling system in the boiler is simple in structure, flow rate of working media in the tubes is constant, and the problem that original flow in one tube is distributed into two or more tubes, mass velocity in each tube is reduced, and accordingly a cooling effect of the spiral tubes and corresponding vertical tubes is affected is avoided.

Description

technical field [0001] The present invention relates to a boiler, in particular to a boiler comprising a water cooling system used in a variable-section furnace. Background technique [0002] For supercritical boilers, in order to make the boiler operate safely and reliably, it is necessary to limit the maximum metal temperature of the water wall tubes and the temperature difference between adjacent tubes. In a once-through furnace operating under supercritical pressure, there is no distinction between liquid and vapor phases, and the temperature of the medium continues to increase. Due to the uneven absorption of radiant heat (caused by the geometric position of the tube, the combustion heat release mode, and the cleanliness of the furnace) and the difference in mass flow rate (caused by the different fluid resistance of different tubes), the wall temperature of the tube is different, and the temperature difference is too large. Lead to increased thermal stress, if not res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23M5/08
Inventor 左德权蔡宏孟国超
Owner SHANGHAI BOILER WORKS
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