SU1657851A1 - Systems of cooling boilers for converter gases - Google Patents

Abstract

The invention relates to power engineering, in particular to utilization boiler installations, and m. used for boiler-coolers (CO) of converter gases of steel-smelting converters. The goal is to increase maneuverability, efficiency and reliability. When the system in the case when one of the KO. For example, the first (left in the drawing) circuit is in operation, accompanied by blowing the converter of the left separator drum (BS) 1, and the other two QCs are in reserve, the valves 22 on the steam lines 21 of all BS 1 are open. In BS 1 of the middle and right circuits, a smaller pressure is established than in BS 1 of the left operating QD, the condensation of steam coming from BS 1 of the left contour occurs in them and the water level in these BS increases. When the water level exceeds the permissible level of the 2-level indicator axis, the control valves 16 and 20 open, and water from the BS 1 of the middle and right QDs enters the collector 8. When the working BS 1 starts charging, the control valve 15 opens, and water from the collector 8 flows through the bypass pipe 13 into the suction inlet 5 of the circulation pump 7 of the operating CO circuit. 1 il. AND

Description

The invention relates to energy, and in particular to recycling boiler plants, and can be used for boiler chillers of converter gases of steel converters.

The purpose of the invention is to increase maneuverability. profitability and reliability.

The drawing shows a schematic diagram of a system of boiler-coolers.

The converter gas boiler-cooler system contains at least two circulation circuits (three circuits are shown in the diagram), each of which includes a drum separator 1 connected with each other with a level indicator 2 and a feed pipe 3 and a heating surface 4 connected respectively to the suction 5 and pressure head 6 nozzles of the circulation pump 7, as well as a prefabricated manifold 8 connected via overflow pipes 9 and 10 with control valves 11 and 12 to pressure head 5 and suction 6 nozzles of the first and second circuits with responsibly and additional bypass pipes 13 and 14 with control valves 15 and 16, each of which is connected at one end 5 to the suction and discharge nozzles 6 of the first and second circuits respectively and their other ends to a collection manifold 8.

If the system contains more than two boiler-coolers with circulation circuits. the suction 5 and pressure 6 pipes of the circulation pump 7 of each additional circuit are connected by corresponding bypass pipes 17 and 18 with control valves 19 and 20 with manifolds 8.

All drum separators 1 of each circuit are connected via steam lines 21 with valves 22 to a common steam manifold 23. Flow meters 24 are installed on each feed pipe 3 of drum separators 1 and interlocked with control valves 12, 15 and 19. Level gauges 2 of each circuit are interlocked with control valves 11.16 and 20.

The system operates as follows.

In the case when one of the boiler-coolers, for example, the first left circuit in the drawing, is in operation, which is accompanied by a purge of the converter (not shown) under the left drum separator 1, and two other boiler-coolers are in standby mode with the loading of cast iron and charge or discharge of steel in the converters of the middle and right boilers, coolers, valves 22 on the steam lines 21 of all drum separators 1 are open. In the drum separators 1 of the middle and right circuits, the same pressure is set lower than the pressure in the drum separator 1 of the left circuit. Due to the cooling of water in the heating surfaces 4 of the middle and right circuits, which are in reserve, in their drum separators 1 there is condensation of steam coming from the drum-separator 1 in operation of the first left circuit through the steam line 21 and the collector 23. Moreover, the water level in the drum separators 1 of the middle and right circuits increases. If the water level is above the permissible level, the control valves 16 and 20 open automatically at the signal from the level 2 pointers and the water from the drum separators 1 through the bypass pipes 13 and 14 enters the collector 8. With the start of the recharge of the working drum separator 1 of the primary circuit according to the signal from the flow meter 24 of the pipe 3 opens the control valve 15 and water from the collector 8 enters through the bypass pipe 13 into the suction pipe 5 of the circulation pump 7 of the circuit of the working boiler-cooler. When the water level in the drum separators 1 of the inoperative boiler-coolers decreases, the control valves 16 and 20 are closed by a signal from the level 2 pointers and the water drain from the drum separators 1 of these circuits ceases.

The system works similarly when any of the boiler-coolers is turned on.

Such a connection of boiler-coolers can increase maneuverability, reduce the consumption of boiler and feed water, which also increases efficiency and reliability.

Claims (1)

Claim A system of converter gas boiler-coolers, containing two circulation circuits, each of which includes a drum separator with a level indicator and a feed pipe connected to each other and a heating surface, connected respectively to the suction and discharge nozzles of the circulation pump, as well as a collection manifold connected by bypass pipes with control valves to the pressure and suction nozzles of the first and second circuits, respectively, and additional bypass pipes with control valves, each of which is connected at its one end to the suction and discharge pipes of the first and second circuits, respectively, characterized in that, in order to improve maneuverability, economy and reliability, it is provided with a flowmeter, ustanov5 1657851 · located on each feed pipe of the drum separators of each circuit, additional bypass pipes with their other ends are also connected to the said collector, while the control valves of the bypass pipes of the suction pipes and pressure pipes of the pressure pipes of each circuit are blocked respectively with a flow meter and level indicator its contour.