SU1281812A1 - Waste heat-recovery station - Google Patents

Abstract

The invention relates to a power system and can be used in installations utilizing the heat of industrial furnaces. The invention allows to increase the reliability and efficiency. In accordance with the cycle operation of the converter production and the variable mode of operation of the waste-heat boilers (KU), 1 part of the steam from the drums (B) 2 working KU 1 passes through control valves (K) 18, overflow collector 17, return valves K 19 and accumulates in B 2 non-performing KU 1. Excess number of a pair of B 2 pa-.

Description

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boiling KU 1 through regulating K 20, reverse K 21, collector 4 enters heat accumulators 5. A portion of the saturated steam is directed to the intake pipe 8 of the steam jet compressor 6, to the inlet 7 of which steam of energy parameters is supplied from the pipe 11. The averaged steam after the compressor 6 through the regulator 22 enters the regenerative heater 10 and to the steam consumers. Regulation of steam and steam pressure is carried out by varying the flow rate of superheated steam after compressor 6 by regulator 22 and steam saturated by regulator 24. Purge and drainage water from B 2 by pump 13 is directed to system 15 network or process water system 16. 2 hp f-ly, 1 ill.

The invention relates to a power system and can be used in installations for the recovery of heat from industrial furnaces and other heat sources, such as converters.

The aim of the invention is to increase reliability and efficiency by more efficient heat recovery.

The drawing shows a schematic diagram of the heat recovery station

The station contains waste heat boilers 1, equipped with drums 2, connected via steam lines 3 and vapor collector 4 to heat accumulators 5, steam jet compressor 6 with inlet, suction and outlet nozzles 7–9, respectively, and regenerative heater 10 connected to the collector 4 is saturated and the pipeline 11 superheated steam, the averager 12 purging and draining the boiler water, equipped with a drain pump 13, consumers 14 steam, systems 15 and 16 of the network and process water. The station is also equipped with a bypass manifold 17 connected to the drums 2 of each of the boilers 1 through parallel installed regulating and non-return valves 18 and 19, and regulating and non-return valves 20 and 21 are installed in series in each steam pipe 3. Steam-jet compressor 6 with an intake pipe 8 - is connected to the collector 4 of the overhead steam, with the inlet 7 to the pipeline 11 of the superheated steam, and the outlet 9 through the regulator 22 to the regenerative heater 10 and

consumers 14 pair. The drain pump 13 of the averager 12 purging and draining the boiler water communicated with systems 15 and 16 of the network and process water. A conduit 23 connecting the regenerative heater 10 to the saturated steam collector 4 is provided with a regulator 24.

The heat recovery station operates as follows.

In accordance with the cycle operation of converter production and the variable mode of operation of waste heat boilers 1 part steam from the drums 2 of the operating waste heat boilers 1 passes through control valves 18, the overflow collector 17, check valves 19 and accumulates in the drums 2 of the non-operating waste heat boilers 1 . Excess steam from the reels 2 of the operating waste-heat boilers 1 through the control valves 20, check valves 21 and the collector 4 enters the heat accumulators 5. Part of the saturated steam is directed to the suction inlet 8 of the steam-jet compressor 6, to the inlet nozzle 7 of which from the pipeline 11 enters a pair of energy parameters.

The averaged steam after the steam-jet compressor 6 through the regulator 22 enters the regenerative heater 10 and to the consumers 14 steam. The temperature and pressure of the steam is controlled by varying the flow rate of the superheated steam after the steam-jet compressor 6 by the regulator 22 and the saturated steam by the regulator 24.

The purge and drainage water from the drums 2 of the waste-heat boilers 1 of various pressures is supplied to the averager. 12, where it is expanded to the required pressure, and the pump 13 is sent to the system 15 of the network or system 16 of the process water.

The heat recovery station allows the drums 2 of the non-operating waste heat boilers 1 to be maintained in a hot condition without an external source of steam, to use them as additional heat accumulators, to increase the reliability of steam supply to consumers 14 and to use the heat of purge water.

Claims (3)

1. A heat recovery station containing at least two waste-heat boilers equipped with drums connected via steam lines and a saturated steam collector to heat accumulators, a steam-jet compressor with inlet, suction and discharge nozzles and a regenerative heater connected to pipe collector and pipeline heated steam, blowdown averager and boiler water drain, equipped with a drain pump, steam consumers, as well as network and technical water systems, which, in order to increase reliability and efficiency by more efficient heat recovery, the station also contains regulating and non-return valves and overflow manifold connected to the drums of each of the boilers through parallel installed regulating and non-return valves - and regulating and return valves are installed in each steam line Ana. 2, Station POP.1, characterized in that it additionally contains a regulator, and the steam-jet compressor is suction-in nozzle connected to a saturated steam collector, inlet - to the superheated steam pipeline, and an outlet nozzle - through the regulator to the regenerative heater and consumers couple. 3. Station POP.1, characterized in that the drain pump communicates with the network and technical water systems.