SU364822A1 - DEVICE FOR DISTRIBUTION OF CONSUMER GAS CONSUMER \ - Google Patents

Description

one

The invention relates to the field of ferrous metallurgy, in particular, to devices for distributing blast furnace gas to consumers and has a rational supply of gas to consumers operating at different gas pressures.

The available pressure of the blast furnace gas before entering the plant-wide network is quenched in throttle groups of blast furnaces up to 800-1UOO mm of water. Art.

At the same time, buffer consumers of low-pressure blast-furnace gas — a boiler plant and excess gas candles — are connected to the plant-wide gas distribution network.

To supply consumers working at elevated pressure, as well as consumers located at a considerable distance from the blast furnace shop, the blast furnace gas distribution system is equipped with special gas-raising stations, in which the pressure of blast furnace gas is additionally increased to 2000-225 ml of water. Art.

The known device for distributing blast furnace gas has the following disadvantages;

- energy loss with decreasing pressure of the blast furnace gas in the throttle group;

-the presence of special gas-exploring stations, requiring high costs for their construction, maintenance and maintenance;

-significant energy consumption for

additional pressure increase of the blast furnace gas.

In order to eliminate these drawbacks, the proposed device is equipped with an additional low-pressure manifold, laid along the blast furnaces, and each furnace is connected to both collectors interconnected by a bypass gas pipeline having an automatic regulator to itself. In this case, the useful pressure of the blast-furnace gas within 2 ((} 0 mm of water. From the throttle group is used, and the entire presence of the blast-furnace gas is distributed into two streams: the first (with pressure up to 1000 mm of vacuum) is low pressure; the second (with a pressure of 2000–2.0 mm of water) —for the high-pressure manifold.

The schematic diagram shows the proposed distribution system of blast furnace gas to consumers.

The proposed device includes dust collectors 1, which are connected by a gas pipeline 2 of dirty gas to pressure scrubbers 3 used to pre-clean and cool the blast furnace gas, throttle group 4, a droplet separator 5, and a gas distribution system consisting of a high-pressure manifold 6 and a collector 7 low pressure. Both manifolds are interconnected by an overflow gas pipeline 8 with a pressure regulator up to them and each domain furnace is connected to them.

Buffer consumers 9 and excess gas plugs 10 remain connected to the low pressure gas manifold.

The proposed device works as follows.

In normal operation, all blast furnaces or a part are connected to a high-pressure collector 6 and from it are supplied with clean blast-furnace gas (without a preliminary increase) of all consumers (a e, c) operating at an increased gas pressure. To consumers of low pressure gas (a, b, c), gas comes from low pressure manifold 7. Gas is transferred to this collector from a high-pressure collector through an overflow gas pipeline 8 by means of a pressure regulator up to and from the rest of the furnaces included in it.

The excess gas entering the high-pressure manifold through the regulator goes up to the low-pressure manifold, and the excess gas in this manifold goes to the buffer consumer in the usual order.

If it is necessary to stop or switch one of the furnaces to a reduced pressure, more furnaces should normally be connected to the high-pressure collector than is required by the gas balance for high-pressure gas consumers. 2 I ГЯ (3) ффCJ д7 5) Ф фм (5 7 J7-1 Г1 К К h

In the event of an emergency stop of one of the furnaces operating in the high-pressure manifold, the discharge of gas into the low-pressure manifold is automatically reduced by the regulator to itself at the bypass gas pipeline. In this case, the lack of gas in the low-pressure manifold is also compensated for by reducing the gas supply to the buffer consumer in the usual order.

When converting one of the furnaces to a low pressure (0, 15 bar), it automatically switches the operation to the low pressure gas collector. The proposed device is fully suitable for installation behind blast furnaces gas-expansion turbines. In this case, the gas-expansion turbines of the furnaces operating in the high-pressure manifold are maintained;

2500 mm waters. Art.

Subject invention

A device for distributing blast furnace gas to consumers, comprising a high pressure clean gas collector, branch pipes with valves, characterized in that, in order to simultaneously provide high and low pressure gas to consumers, it is equipped with a low pressure collector connected to the high pressure collector by means of an overflow gas pipeline throttle pressure regulator. R-Vu YuOOmmZod. cm P 2Sh 2Shmm Sad. cms