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Horizontal type waste heat boiler of zinc-containing dust recovery system of rotary hearth furnace

A technology of dust recovery and waste heat boiler, which is applied to boiler water pipes, furnaces, blast furnaces, etc., and can solve problems such as unsatisfactory cooling effects

Active Publication Date: 2012-09-05
SHANDONG IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in actual use, because the flue gas enters the rear heating surface directly in the large cavity, the cooling effect is not ideal

Method used

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  • Horizontal type waste heat boiler of zinc-containing dust recovery system of rotary hearth furnace
  • Horizontal type waste heat boiler of zinc-containing dust recovery system of rotary hearth furnace
  • Horizontal type waste heat boiler of zinc-containing dust recovery system of rotary hearth furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 , figure 2 , image 3 As shown, the horizontal waste heat boiler of the zinc-containing dust recovery system of the rotary hearth furnace consists of a furnace body and a furnace frame 30. The furnace body is arranged on the furnace frame 30. The cavity-like structure formed by the buried scraper machine 29, the water-cooled wall of the furnace body is composed of the water-cooled wall 2 of the front wall, the water-cooled wall of the left wall 3, the water-cooled wall of the right wall 4, and the water-cooled wall of the ceiling 5; the water-cooled wall of the front wall 2 is provided with smoke Gas inlet 1, rear wall water cooling wall 5 is provided with flue gas outlet 31, ceiling water cooling wall 5 is sequentially provided with flue gas radiation baffle 10, first radiant tube panel 13, second radiant tube panel 14, superheater 19; The top of 30 is provided with a steam drum 22, the inlet of the steam drum 22 passes through the outlet of the ris...

Embodiment 2

[0030] As described in Example 1, the horizontal waste heat boiler of the zinc-containing dust recovery system of the rotary hearth furnace is different in that the ceiling water wall 5 is provided with 3 sets of radiant tube screens, and the distance between the heat exchange tubes of the flue gas radiant baffle 10 is 120mm, the distance between the heat exchange tubes of the first radiant tube panel is 540mm, the distance between the heat exchange tubes of the second radiant tube panel is 320mm, and the distance between the heat exchange tubes of the superheater tube panel is 280mm.

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Abstract

The invention relates to a horizontal type waste heat boiler of a zinc-containing dust recovery system of a rotary hearth furnace, belonging to the technical field of steel-making waste gas processing devices. The horizontal type waste heat boiler of the zinc-containing dust recovery system the rotary hearth furnace comprises a boiler body and a boiler cradle, wherein the boiler body is arranged on the boiler cradle; the boiler body is a cavity-shaped structure consisting of a boiler body water-cooling wall and an embedded scraping plate mechanism arranged on the bottom of the boiler body water-cooling wall, the boiler body water-cooling wall consists of a front wall water-cooling wall, a left wall water-cooling wall, a right wall water-cooling wall and a ceiling water-cooling wall, wherein the front wall water-cooling wall is provided with a smoke gas inlet, a rear wall water-cooling wall is provided with a smoke gas outlet, and the ceiling water-cooling wall is sequentially provided with a smoke gas radiation baffle plate, a radiation tube panel and an overheater; and the boiler cradle is provided with a steam pocket and a circulating pump. The invention can not only solve the problem of tube wall dust adherence, but also recover heat contained in smoke gas as much as possible under harsh conditions.

Description

technical field [0001] The invention relates to a horizontal waste heat boiler of a zinc-containing dust recovery system for a rotary hearth furnace, and belongs to the technical field of steelmaking waste gas treatment devices. Background technique [0002] Steel mills produce a large amount of dust every day, most of which are mainly composed of iron and carbon, and also contain some zinc. These iron-containing dusts are generally sintered into pellets and returned to the blast furnace for ironmaking. However, during the sintering process, almost all the zinc in the dust remains, making the zinc content in the pellets higher and higher, which will generate zinc deposits in the blast furnace, seriously affecting the use of the blast furnace. Therefore, dust with high zinc content cannot be used as raw material for blast furnaces, and can only be thrown away and landfilled, which not only wastes resources, but also causes environmental pollution. In view of this situation,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22B1/18F22B37/10F23M9/10F23J3/02F23J1/00F22G3/00F27D17/00C22B1/00C21B5/00
CPCY02P10/25
Inventor 曾晖徐元生闫小卫王平姚朝胜徐建新陈锡明钱飞舟姜泽毅顾君健
Owner SHANDONG IRON & STEEL CO LTD
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