Multi-shell-pass shell-and-tube type flue gas heat exchange device
A flue gas heat exchange, multi-shell pass technology, applied in the field of heat treatment, can solve the problems of no further recovery of high-temperature flue gas waste heat, reduced gas combustion efficiency, and high nozzle temperature, and achieves increased temperature, reduced nitrogen oxide emissions, and improved contact. area effect
Active Publication Date: 2020-12-01
炬鼎热能科技(苏州)有限公司
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Problems solved by technology
Due to the limitation of the structure and size of the burner itself, the temperature of the nozzle is high, and the waste heat of the high-temperature flue gas is not further recovered, but is directly mixed with cold air and discharged outside the plant, which causes a waste of energy
In addition, the combustion-supporting fan directly sends the air in the air duct to the combustion-supporting air duct of the burner, and the air directly participates in combustion-supporting without preheating, which will reduce the combustion efficiency of the gas. Based on this, the present invention proposes a multi-shell-side tube shell Type flue gas heat exchange device, which can reduce the temperature of flue gas discharge and at the same time realize the preheating of combustion air
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[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.
[0024] Examples of embodiments are shown in the drawings, wherein like or similar reference numerals denote like or similar elements or elements having same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the invention and should not be construed as limitations of the invention.
[0025] In describing the invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The...
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The invention discloses a multi-shell-pass shell-and-tube type flue gas heat exchange device. The Multi-shell-pass shell-and-tube type flue gas heat exchange device comprises a shell with the exteriorbeing rectangular and the interior being of a cavity structure, the side walls of the two sides of the shell are connected with an air inlet pipe and an air outlet pipe correspondingly, a flue gas inlet pipe is installed at the bottom of the rear wall of the shell, a flue gas outlet is formed in the top of the shell, a flue gas channel and a multi-shell-pass air channel which are used for heat exchange and do not communicate with each other are formed in the shell, and the flow direction of flue gas in the flue gas channel is opposite to the flow direction of air in the multi-shell-pass air channel. Specially arranged flue gas pipelines are arranged in a heat exchange device to form the flue gas channel, an area formed by the interior of the shell and the flue gas pipelines serves as a combustion-supporting gas channel, combustion-supporting air and high-temperature flue gas exchange heat through the pipe walls, the temperature of the combustion-supporting air can be increased, thus the combustion efficiency is improved, meanwhile, local overheating of flames can be reduced, nitrogen oxide emission can be reduced, and the workshop environment can be improved.
Description
technical field [0001] The invention relates to the technical field of heat treatment, in particular to a multi-shell-side shell-and-tube flue gas heat exchange device. Background technique [0002] The combustion of the existing heat treatment furnace is mainly composed of a combustion air system and a smoke exhaust system. The combustion air system includes a combustion air fan, a combustion air main pipe, a combustion air branch pipe and a burner combustion air pipe. The furnace burner participates in combustion, and the flue gas generated by the combustion of the heat treatment furnace is exhausted from the burner of the heat treatment furnace to the outside of the plant through the smoke exhaust system. Due to the limitation of the structure and size of the burner itself, the temperature of the nozzle is high, and the waste heat of the high-temperature flue gas is not further recovered, but is directly mixed with cold air and discharged outside the plant, which causes a...
Claims
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IPC IPC(8): F28D7/16F23L15/04F23J15/06
CPCF23J15/06F23L15/04F28D7/1661Y02E20/34
Inventor 皮大成张晓峰
Owner 炬鼎热能科技(苏州)有限公司