SU1177351A2 - Blast furnace gas heating arrangement - Google Patents

Abstract

DEVICE OF HEATING OF DOMAIN GAS, according to ed. St. No. 1027220, characterized in that, in order to increase the degree of heat utilization of steam, the heat exchanger-heat exchanger consists of sections that are connected separately to steam pipelines of evaporative cooling systems of the domain and open-hearth furnaces, as well as the selection of turbines.

Description

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The invention relates to ferrous metallurgy and is intended to preheat the purified gas and to cool the vapor of evaporative cooling units.

The purpose of the invention is to increase the degree of heat recovery of steam.

The drawing shows a schematic diagram of the device being intended. ,

The device contains heat exchanger section 1, installed on the gas pipeline 2 from the blast furnace 3 and wet gas cleaning 4 to the utilizer 5, which is, for example, an energy steam generator

The device works as follows.

Heat exchanger-heat exchanger 1 has sections q уВ and b, connected to steam pipelines with a pressure of 1.2-13 at. For example, in the section AND blast furnace gas. It is heated by the steam of an evaporative cooling plant for blast furnaces with a pressure of 1.2 atmospheres to 105 s. the blast furnace gas is heated by steam.

Novokova evaporative cooling of open-hearth furnaces with pressure of 7 ATA to bАС. In section S - with steam pressure of 12-13 at to 187 ° С. Thus, along the course of blast furnace gas, the sections are connected to an ever higher vapor pressure,

In general, the number of sections depends on the scheme of low steam lines

the pressure of a particular metallurgical plant and the parameters of steam generated by the evaporative cooling of furnaces and the selection of turbines;

In the summertime, steam of the evaporative cooling units and part of the turbine extraction is used to heat the blast furnace gas. In wintertime, depending on the heat balance of the specific production, heat exchangers 1 remain in operation or part of the steam sections are disconnected. Thus, the partitioning of the heat exchanger I allows more

flexibly use it throughout the year.

Claims (1)

DEVICE FOR HEATING DOMAIN GAS, by author. St. No. 1027220, characterized in that, in order to increase the degree of steam heat recovery, the heat exchanger-recuperator consists of sections that are connected separately to the steam pipelines of the evaporative cooling systems of blast and open-hearth furnaces, as well. selection of turbines.