SU373439A1 - PAROSIL-POWER INSTALLATIONVSES0503NAYA I | PAT? L1NO-TSH.: '. ""' 0 '^? | | 5th &; gis' '' • "--- ( - Google Patents

Description

one

The invention relates to a power system, in particular to powerful power units with flushing boilers, equipped with built-in separators, and containing a deployed regeneration system.

A steam-powered unit containing a steam boiler with an integrated separator, connected by a steam line to a superheater, high-pressure heaters with cascade drainage of drains and a deaerator.

However, a disadvantage of the known installations is the incomplete utilization of the heat of water discharged from the built-in separator, and the complication of the circuit due to the presence of a pilot extender.

In order to increase the efficiency of the start-up modes in the proposed steam-powered installation, the drain pipe from the separator is connected to the vapor space of the pref. last in the course of feedwater, the preheater, and the steam space of the first high pressure preheater (LDPE) is connected to the deaerator.

The drawing shows the scheme described steam power installation.

To ensure the start-up of the installation on sliding parameters of steam in the intermediate

The point of the path of the flow boiler after the flue screens is installed: an integrated valve 2 is installed with a medium outlet in front of it through conduit 3 with the throttle valve 4 into the built-in separator 5, steam from which is fed through conduit 6 with the throttle valve 7 to the steam superheater 8 of the boiler. Water from the built-in separator through the pipeline 9 with the throttle (regulating) valve 10 enters the second last space in the steam space along the LDPE // feedwater. Part of the steam from the built-in separator through the regulating valve 12 through the pipeline 13 is fed into the vapor space of the latter along the feedwater of the HPP M. Through pipelines 15 and 16 of the cascade drainage drain with control valves / 7 and 18, the steam condensate from the last PVF 14 and water supplied from of the built-in separator 5, in the penultimate one along the LDPE feedwater, is supplied to the vapor spaces of the remaining LDPE 19. The evaporation from the first LFW feedwater 19 is supplied through conduit 20 with a control valve 21 to the deaerator 22 dl deair feed water. The feed water from the deaerator is pumped by the feed pump 23 through the LDPE 19, 11 and 14 and fed through the boiler feed valve 24 to the boiler.

Water from the LDPE 19 through the pipeline 25 cascade draining the tree with a control valve 26 is sent in addition to the deaerator in the low pressure heater (HDPE) 27.

Then, water passes through pipelines 28 of cascade drainage (HDPE) with control valves 29 through these heaters and from the second 30 or first 31 along the main condensate, the HDPE is discharged through pipeline 32 with control valve 33 into the circulation channel, or through pipeline 34 with control valve 35 - in the capacitor 36 turbiva. It is also possible to supply water with a drain pump 37 from the HDPE to the main condensate path 38, through which the condensate pump 39 supplies condensate from the condenser 36 to the deaerator 22.

To protect the last 14 and next-to-last U / downstream of the supply water from the pressure of the heating medium in their vapor spaces, these heaters are equipped with safety valves 40. Pipe 41 with a control valve is also provided to allow water from the built-in separator 5 to be discharged into the turbine condenser 36, a pipeline 42 for supplying steam to the deaerator from an unauthorized source, and a pipeline 43 with a control valve and a valve for discharging water from the first LDPE 19 along the feedwater to the sewage system.

In addition, the following notation is used in the diagram: pipelines 44, turbine 45, generator 46, intermediate heater 47.

When starting the boiler in the separator mode, part of the steam from the built-in separator 5 is removed through the regulating valve 12 through the pipeline 13 to preheat the feed water entering the boiler in the latter along the PVD 14 feed water. The condensate of this steam is drained into the PVD 19 through the regulator 15 valve 17. Water from the built-in separator 5 through the pipeline 9 with the valve O | M 10 enters the steam chamber of the LDPE // for heating the feed water. From LDPE //, having given away some of the heat that has come from the separator, water through pipelines 16 with regulating valves 18 cascade draining drains LDPE passes through the steam space of LDPE 19, again partially gives off its heat to the feed water. In addition, the LDPE 19 works as an expander — the vapor from it through line 20 is supplied to deaerator 22 to deaerate the feed water. From the LDPE 19, water through the pipeline 25 through the control valve 26, which regulates the discharge of water, from the LDPE 19, is directed into the vapor space of the HDP 27. Passage through the steam spaces of the HDPE 27, 30 (31} connected by drainage pipelines 28, the water heats the main condensate entering the deaerator 22. Paving through high and low pressure regenerative heaters and supplying its heat to the feed water and condensate water from the integrated separator, cooled to a temperature close to the temperature of the main condensate after the condensate depending on its quality, it can either be discharged into the sewer (circulating water) through pipeline 32 with valve 33 (if the water quality does not allow mixing it with the main condenser), or supplied to condenser 36 through pipeline 34 with valve 35 (if the quality of water after treatment in the block desalting plant is satisfactory), or: be supplied by a drain pump 37 to the main condensate path 38, if no additional chemical treatment of this water is required. Depending on where the water is supplied, the regulation of water passing through the HDPE is performed by one of three valves 33, 35 or 48.

Thus, the scheme provides maximum utilization of the heat of water discharged from the built-in separator 5, and, therefore, heating the condensate and feed water to a temperature close to the saturation temperature in the built-in separator, without mixing the discharged water with the feed water entering the boiler. At the same time, the washing of iron oxides and salts from the steam rooms of the high-pressure polyethylene and HDPE is carried out intensively, since the water flow through the preheaters is greater than with steam-washing from turbine selections.

With a turbine load of about 15–20% of the nominal value, the latter is transferred to the feed 44 by steam supply from the turbine intake feedwater.

When switching to a continuous boiler operation mode - when the turbine reaches

1.1

--- Initial load - produced

3 6

transfer of LDPE and HDPE to steam supply from turbine selections through pipelines 44.

Subject invention

A steam-powered unit containing a continuous-flow boiler with an integrated separator, connected by a steam pipe with a superheater, high-pressure heaters with cascade drains, and a deaerator, which are connected to the the vapor space of the penultimate one is along the preheater feedwater, and the vapor space of the first high-pressure heater is connected to the deaerator.