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Boiler using waste heat generated after dry granulation of blast furnace slag

A technology of dry granulation and blast furnace slag, which is applied in furnaces, waste heat treatment, furnace components, etc., can solve problems such as large water consumption, failure to recover and utilize heat, and environmental pollution, and achieve low investment costs and real The effect of direct use and simplification of the process

Inactive Publication Date: 2016-06-01
SUZHOU HAILU HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, my country mainly adopts the water quenching method to treat blast furnace slag, which consumes a lot of water resources, not only cannot recover and utilize most of the heat, but also produces harmful gases such as hydrogen sulfide and sulfur oxides, causing environmental pollution

Method used

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  • Boiler using waste heat generated after dry granulation of blast furnace slag

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Embodiment Construction

[0018] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0019] Such as figure 1 As shown, the waste heat boiler after dry granulation of blast furnace slag according to the present invention includes a shell, and the shell 10 is sequentially provided with a slag homogenizer 4, a superheater 1, an evaporator 2, a province Coal burner 3, slag hopper 11 and screw slag extractor 5, steam drum 6, circulation pump 7 and feed water pump 13 are arranged outside the shell 10, snake-shaped Tube bundle, the inlet end of the serpentine tube bundle in the superheater 1 is connected with the steam drum 6, the inlet end of the serpentine tube bundle in the evaporator 2 is connected with the steam drum 6 through the circulating pump 7, and the outlet of the serpentine tube bundle in the evaporator 2 The end is connected with the steam drum 6, the inlet end of the serpentine tube bundle in the economizer 3 is conn...

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Abstract

The invention discloses a boiler using waste heat generated after dry granulation of blast furnace slag. The boiler is simple in structure and high in heat exchange efficiency and comprises a shell. A slag evening device, a superheater, an evaporator, an economizer, a slag hopper and a spiral slag extractor are sequentially arranged in the shell from top to bottom. A steam pocket, a circulation pump and a water feeding pump are arranged outside the shell. S-shaped pipe bundles are arranged in the superheater, the evaporator and the economizer correspondingly. The inlet end of the S-shaped pipe bundle in the superheater is connected with the steam pocket. The inlet end of the S-shaped pipe bundle in the evaporator is connected with the steam pocket through the circulation pump. The outlet end of the S-shaped pipe bundle in the evaporator is connected with the steam pocket. The inlet end of the S-shaped pipe bundle in the economizer is connected with the water feeding pump. The outlet end of the S-shaped pipe bundle in the economizer is connected with the steam pocket. The boiler using the waste heat generated after dry granulation of the blast furnace slag has the advantages of simplifying the process, being applicable to various kinds of blast furnace slag obtained after dry granulation, and being simple in structure, easy to build, low in investment cost and free of dust pollution in the whole process.

Description

technical field [0001] The invention relates to a waste heat boiler after dry granulation of blast furnace slag on the waste heat boiler. Background technique [0002] Blast furnace slag in a high-temperature molten state, with a temperature between 1350 and 1600 ° C, is a high-grade waste heat resource. For every ton of pig iron produced, 300-400kg of slag should be produced as a by-product, and its enthalpy is equivalent to the calorific value of 23.34kg of standard coal. [0003] At present, my country mainly adopts the water quenching method to treat blast furnace slag, which consumes a lot of water resources, not only cannot recover and utilize most of the heat, but also produces harmful gases such as hydrogen sulfide and sulfur oxides, causing environmental pollution. The dry granulation method of blast furnace slag and the relevant research on the waste heat recovery system have become domestic research hotspots recently, some process theories have emerged, and some ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/06F27D17/00
CPCC21B3/06F27D17/004F27D2017/006Y02P10/25Y02W30/50
Inventor 阚旭恒钱飞舟胡法议
Owner SUZHOU HAILU HEAVY IND
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