Afterheat recycling device and method of high temperature flue gas containing high adhesive dust

A waste heat recovery device and high-temperature flue gas technology, applied in the steam generation method using heat carrier, waste heat treatment, energy efficiency improvement, etc., can solve the problems of unusable equipment, blockage of heat exchanger, and inability of continuous operation of rotary hearth furnace, etc.

Inactive Publication Date: 2013-02-13
NANJING SHENGNUO HEAT PIPE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cause the entire heat exchanger to be blocked and the equipment cannot be used
Th...

Method used

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  • Afterheat recycling device and method of high temperature flue gas containing high adhesive dust
  • Afterheat recycling device and method of high temperature flue gas containing high adhesive dust

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Embodiment Construction

[0029] Such as figure 1 As shown, the device of the present invention comprises: a steam output pipe 1, an ascending pipe 2, a descending pipe 3, an upper connecting pipe 4, a water jacket pipe 5, a lower connecting pipe 6, a heat pipe 7, a flue gas inlet 8, a scraper 9, a scraper Plate connecting pipe 10, steam drum 11, deoxygenated water inlet pipe 12, scraper driving mechanism 13, upper header pipe 14, lower header pipe 15, flue 16, flue gas outlet 17, airtight valve 18, ash collection bin 19.

[0030] Such as figure 1 As shown, the flue 16 of the waste heat recovery device is arranged horizontally. The waste heat recovery device uses heat pipes as heat exchange elements, and the outer side of the heat pipes is a bare pipe or a straight finned tube. The heat absorption section of the heat pipe 7 is vertically inserted into the flue 16, and the lower section of the heat pipe 7 is in a free state; the heat absorption section of the heat pipe 7 Scraper 9 is arranged on the ...

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Abstract

The invention provides a device and a method capable of effectively cleaning dust on the surface of a heat exchange pipe and continuously operating for recycling afterheat of high temperature flue gas containing high adhesive dust and generating stream. According to the invention, a fuel is horizontally arranged, a heat pipe is used as a heat exchange element, the heat pipe is vertically arranged, and the lower segment of the heat pipe is at a free state for conveniently cleaning the dust. The heat pipe transmits the high temperature heat in the fuel to the water in a sleeve to evaporate water to generate stream so as to recycle the afterheat. A scraping plate is used as a dust cleaning device of the heat pipe in contact with the fuel gas, the scraping plate periodically moves up and down to scrap the dust at the outside of the heat pipe into a dust collection bin below a heat exchanger, and a sealed valve is arranged between the heat exchanger and a dust hopper to clean the dust online. According to the invention, the property of the heat pipe and the special scraping plate dust cleaning structure is utilized to solve the problem of cleaning the dust on the surface of the heat exchanger when recycling the afterheat of high temperature flue gas containing high adhesive dust.

Description

technical field [0001] The invention relates to a flue gas waste heat recovery device and method in the industrial field, in particular to the waste heat recovery of high-temperature flue gas with a temperature range of 700-1200°C that produces a large amount of highly cohesive dust in kiln production. Background technique [0002] In some occasions in the industrial field, a large amount of flue gas will be produced, and the temperature of the flue gas is as high as 700~1200°C. It is necessary to recover its heat before discharging to achieve the purpose of energy saving and environmental protection. When iron and steel plants use rotary hearth furnaces to separate zinc from iron-containing dust, due to the strong cohesiveness of zinc oxide dust and the large amount of dust, a large amount of highly cohesive zinc oxide is bonded to the heat exchange during the waste heat recovery process. On the surface of the device, the scale gradually increases, and finally the waste hea...

Claims

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Application Information

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IPC IPC(8): F22B1/18F27D17/00
CPCY02P10/25
Inventor 陈金福徐德新陆桂清邵李忠王少云郭宏新
Owner NANJING SHENGNUO HEAT PIPE
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