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Blast furnace gas preprocessing method and device

A treatment method and gas pre-treatment technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve problems such as blockage and corrosion of gas-gas heat exchangers, and achieve the effects of reducing emission pollution, increasing combustion calorific value, and improving dehydration rate.

Inactive Publication Date: 2013-02-27
NANJING SHENGNUO HEAT PIPE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention effectively improves the dehydration rate of the gas by adding a condensation process before the mechanical dehydration step, and further solves the problem of corrosion and blockage of the gas-gas heat exchanger caused by the high water content of the gas in the existing treatment method

Method used

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  • Blast furnace gas preprocessing method and device
  • Blast furnace gas preprocessing method and device
  • Blast furnace gas preprocessing method and device

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Embodiment Construction

[0037] Such as figure 1 As shown, the device of the present invention includes a gas pipeline 1, a condensation dryer 2, a demister 3, a heat pipe gas-gas heat exchanger 4, a cold water pipe 5, a hot water pipe 6, a flue gas pipe 7, a water pump 8, a cold shower 9 towers, 10 pools.

[0038] Such as figure 1 As shown: the gas pipeline 1 is sequentially connected to the upper layer of the condensation dryer 2, the demister 3, and the heat pipe gas-gas heat exchanger 4; the hot flue gas passes through the lower layer of the heat pipe gas-gas heat exchanger 4; the serpentine shape of the condensation dryer 2 The heat exchange pipes are connected to the cold water pipe 5 and the hot water pipe 6 respectively. The hot water pipe 6 is connected to the cold shower tower 9, and a pool 10 is arranged under the cold shower tower 9. When the hot water is used directly, no cooling tower is required. The cold water pipe 5 is connected with the pool 10 through a water pump 8 .

[0039] ...

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Abstract

The invention provides a preprocessing method and device which can effectively perform condensation and dehydration on high-moisture blast furnace gas from iron and steel plants, and can utilize waste heat of flue gas for heating. The method comprises the following steps of: performing heat exchange on water and the wet furnace gas entering a condensing dryer; removing part of saturated water in the furnace gas which is cooled after the heat exchange, and meanwhile, heating the cold water in the condensing dryer through the heat transfer; and removing mechanical water of the furnace gas from the condensing dryer in a demister; and warming the furnace gas through absorbing the waste heat of the flue gas in a flue gas waste heat recovery device after the furnace gas is subjected to cooling, condensation and dehydration as well as mechanical dewatering. The method and the device provided by the invention effectively solve the problems of erosion and blockage of the flue gas waste heat recovery and heat exchange device caused by high moisture of the blast furnace gas; and meanwhile, the combustion heat of the dried gas preprocessed by the method and the device is greatly improved, and thus the whole heat recovery efficiency is improved.

Description

technical field [0001] The present invention relates to the pretreatment method of blast furnace gas in iron and steel plant before combustion, in particular to the pretreatment method of blast furnace gas containing relatively high moisture and harmful substances such as sulfur and chlorine, including removing moisture in blast furnace gas and utilizing iron and steel The treatment method of heating the waste heat of the flue gas in the factory. [0002] The invention also relates to a device for implementing the above-mentioned pretreatment method. Background technique [0003] In order to save energy and make full use of the waste heat of flue gas to recover heat energy in iron and steel plants, the gas that enters the hot blast stove or power plant boiler usually first absorbs the waste heat of the flue gas from the hot blast stove or power plant boiler to increase the temperature of the gas to improve the gas combustion efficiency . When the water content of the gas i...

Claims

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Application Information

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IPC IPC(8): C10K1/04C21B5/06
CPCY02P10/25Y02P20/10Y02P20/129
Inventor 范红途徐德新黄海波叶莲彬郭宏新
Owner NANJING SHENGNUO HEAT PIPE
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