SU709687A1 - Device for pressure balancing in interconic blast furnace space - Google Patents

Description

The invention relates to ferrous metallurgy, in particular, to devices for filling gas in the inter-conical space of hollow furnaces of blast furnaces for pressure equalization. The closest to the described invention by its technical essence and the achieved result is a device for removing gas from the inter cone space of a blast furnace, containing air heaters with a smoke collector, a receiver with an irrigated liquid supply system and gas pipelines 1. When the lower cone is open, there is clean air in the cone space the gas uniformly fills the volume released above the lower cone after it is removed from the charge and then flows from the cone space to the furnace top. Before opening the upper cone in the inter-conical space, the gas pressure is relieved by withdrawing a part of the gas to the net blast-gas collector in order to reduce its losses. The said device is intended to reduce harmful emissions entering the atmosphere from the charging devices of the blast furnaces. The device operates by triggering a gas pressure differential between the cone space and the net blast furnace gas collector. This work is due to the cyclical operation of the loading devices, which are filled with semi-pure blast gas before lowering the lower cone; Before lowering the upper cone (during the intake flow), the pressure is relieved to atmospheric pressure. The cone space is the role of a lock chamber. The disadvantages of the known device are high residual toxic emissions into the atmosphere due to gas displacement of the inter-conical space by the charge during intake flow to the large cone; loss of calorie fuels, toxic emissions are jvn№; the need for the construction of gas disposal lines (the mouth of the cleaning).

The invention is to reduce fuel losses and toxic emissions into the atmosphere, as well as capital expenditures by eliminating the construction of gas treatment facilities.

The goal is achieved by the fact that the interconusal space is connected to the flue collector of gas air heaters - SUPPORTING path, which includes a compressor, a receiver with a liquid cooling supply system / equalizing valves and connecting pipelines The gas supply path at the section connecting the receiver to the interconnection zone has a cable with an interconnecting gas pipeline, with a gas pipeline connecting the receiver with the interconnection zone, with a gas distributor with a gas pipeline connecting the receiver with the interconnection zone, with a gas distributor with a gas pipeline connecting the receiver with the interconnecting gas pipeline, with a gas pipeline connecting the receiver with the interconnecting gas pipeline, with a gas tract connecting the receiver with the interconnecting gas pipeline, with a gas tract connecting the receiver with the interconnecting gas pipeline, with a gas pipeline with an interconnecting gas line connecting the receiver with the interconnecting gas pipeline, with a gas pipeline with an interconnecting gas pipeline connecting the receiver to the interconnecting gas pipeline, with a gas pipeline with an interconnecting gas pipeline connecting the receiver to the interconnecting gas pipeline, with a gas distributor with a gas pipeline connecting the receiver to the interconnecting gas supply system. With a choke.

In the drawing, the layout of the proposed device.

The inter cone space 1 of the furnace, which has a small cone 2 and a large cone 3, is connected to the smoke collector 4 of the air heaters 5. Consequently. KOMitpeccop 6 and receiver 7, equipped with coolant supply system 8, represent gas supply lines. Line 9 with bypass line 10 with throttle 11, installed at the section of route 9 that connects the receiver with spacer and equipped with equalization valve 12. .

The winding of the gas pressure in the cone space during the operation of the described device is carried out as follows.

After closing the small cone 2, when set-up is completed on the large cone 3, choke 11 closes. Valve 12 opens. Gas supply line 9 from the receiver 7 receives a gas-vapor mixture formed in the receiver due to the contact of hot gases with cooling liquid. coming from the system 8. The gases from the flue-gas collector 4 due to compression of them with the cox- pressor 6, I have at the outlet of the receiver 7 a heating block that exceeds the pressure of the blast-furnace gas under the shoe.

After lowering the sore cone and detaching the valve of 12 gadkravpeps from it, the overpressure from the mochconus space is poured with a mixture of gas through the atmosphere through the atmosphere and the set of the mixture begins on the large cone. During the set-up period for a large cone, i.e., for small cone robots, in order to prevent atmospheric air from entering the inter-conical space, the throttle 11 is constantly open and the moeconus space n): is blown by the gas-vapor mixture in the required amount.

The use of the proposed device allows:

reduce emissions of toxic gases and dust into the atmosphere;

ensure failure-free operation {work of the blast furnace safety apparatus;

to ensure operation of the safety device without steam supply of industrial parameters;

Claims (2)

1. A device for reducing the pressure in the inter cone space of a blast furnace, containing air heaters with a smoke collector, a compressor, a receiver with a system for supplying irrigating liquid and gas pipelines, so as to reduce fuel losses and toxic emissions gases and dust into the atmosphere, the device is equipped with a gas supply path, connecting the first inter-conical space with the smoke collector of the air heaters. 2. The device according to claim 1, which is based on the fact that the transmission line is equipped with a bypass with a throttle. Sources of information taken into account in the examination 1. USSR author's certificate No. 36О367, cl. C 21 V 7/22, 197О.