SU1291786A1 - System for stepwise heating,particularly steam turbine unit feed water - Google Patents

Abstract

This invention relates to a power system. EFFECT: higher efficiency. The feed water of the steam turbine plant passes successively stages 2 and 1, where it is heated by steam streams of different potential supplied through pipelines (t) 14 and 15 of the turbine extraction. Greuup condensate (its steam heater (L) 3 stages 1 through T 4 through the spreader 5 placed on the latter and the shut-off and control valves 12 enters the working nozzle of the ejector 11.) The mixing chamber of the last through T 10 from the spreader 9 stage 2 injects steam. At the exit of the ejector 11, the mixed stream enters T 4 of the preheating heating stage 2 in P 4. In P 7, the stream participates in heating the feed water supplied to it. 1 ill. (O (L Hofffyf and omSoff are heating z iodine) 4 Mnaensat .zhei J2 Vy

Description

112

The invention relates to heat and power engineering, and more specifically to the removal of heating steam condensate during its cascade discharge into the surfaces of regenerative heaters of steam turbines of thermal power plants (TPPs) and network water heaters for heating external consumers, and can also be used for similar purposes in other sources industry.

The aim of the invention is to improve the economy.

The drawing shows a diagram of the step heating system.

The system of step heating of predominantly feedwater of a steam turbine installation contains stages 1 and 2 sequentially connected along the course of the heated water (two stages of heating are conventionally shown),

The heating stage 1 contains a heater 3 with a pipe 4 to drain the condensate of heating steam into a stage 2 that is pre-included along the heated feedwater, on which the expander 5 is installed, equipped with a steam discharge pipe 6. The heating stage 2 contains the heater 7 with the pipeline 8 of the condensate fir tree either to the pre-heating stage or to the condenser or deaerator (not shown).

On the pipeline 3 drain placed expander 9, equipped with a pipe 10 of the steam outlet.

Each heating stage, except the last, is equipped with an ejector 11, pa

Claims (1)

Invention Formula Heating System a steam turbine plant, each heating stage of which contains a surface regenerative heater with drain pipes placed on the 4 drain pipe of the heating steam condensate into the pre-included 40 mainly feed water along the heated feed water, with ejector 11 of each stage (one ejector is conventionally designated) injected the medium is connected by a pipeline 10 to remove steam from the expanded-45 densitant of the heating steam to the steps that are pre-connected along the water course, and in each heating stage, except for the last minutes, to the condensate drain pipe disposed dilator 50 snab- adjoint pair conduit outlet, characterized in that. tel 9 upstream in step 2 of the feed water. Shut-off and regulating valves 12 are located on pipelines 4 and 8 of the condensate drain; they are controlled by a signal from the condensate level regulators 13 in expanders 5 and 9. Heaters 3 and 7 are connected in a heating medium to pipelines 14 and 15 of steam extraction from the turbine. The system works as follows. In order to increase efficiency, each stage, except for the last, is equipped with an ejector placed on the pipeline of the condensate drain after the expander and connected to the steam outlet from the expander of the preheating stage along the water flow through the injecting medium. 0 t5 - 0 five 35 The feed water of the steam turbine unit passes successively stages 2 and 1 of heating, where it is heated by steam streams of different potential supplied through pipelines 14 and 15 of steam extraction from a turbine (not shown). The heating steam condensate of the preheater of 3 stages 1 through pipe 4 through the spreader 5 and the shut-off and control valves 12 placed on the latter enters the working nozzle of the ejector 11, into the mixing chamber of which piping 10 from the dilator 9 of the pre-switched heating stage 2 injects the steam generated due to rarefaction appearing in the expander 9. At the outlet of the ejector 11, the mixed flow through conduit 4 enters the heater 7 of the preheat heating stage 2, where it participates in heating the feed water supplied to this heater 7. The degree of closing of the shut-off and control valves 12 on the condensate drain pipes 4 and 8 is automatically maintained by the signal from level controllers 13 in the expanders 5 and 9, while observing the required flow rate of the working flow (drain condensate) in the ejector 11 from the dilator 9 of the upstream stage 2, Invention Formula Heating System 40 predominantly feed water 45 of a heating steam condensate in a steam turbine unit, each heating stage which contains a surface regenerative heater with drain pipes of the heating steam condensate heating water in advance in order to increase efficiency, each level, except for the latter, is equipped with an ejector placed on the pipe. condensate drain after the expander and connected via an injecting medium to the steam discharge pipeline from the pre-switch on the ho do water heating stage.