CN202250270U

CN202250270U - Steam turbine condensing system

Info

Publication number: CN202250270U
Application number: CN201120291216XU
Authority: CN
Inventors: 钱刚; 安德刚; 杨晓平
Original assignee: FUJIAN DAYUAN ENERGY-SAVING ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
Current assignee: FUJIAN DAYUAN ENERGY-SAVING ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
Priority date: 2011-08-11
Filing date: 2011-08-11
Publication date: 2012-05-30
Anticipated expiration: 2021-08-11

Abstract

The utility model discloses a steam turbine condensing system, which comprises a compressor, a heater, an expansion reliever, a steam condenser and pipelines, wherein the outlet of the compressor is connected to the inlet of the heater; the outlet of the heater is connected to the inlet of the expansion reliever; the outlet of the expansion reliever is connected to the inlet of the steam condenser; the outlet of the steam condenser is connected to the inlet of the compressor; dead steam of the steam turbine is connected to the condensed steam inlet of the steam condenser; the condensed steam outlet of the steam condenser is connected to the cold water port of the heater; and the hot water port of the heater is connected to a boiler. According to the utility model, the waste heat of the work-applying dead steam of the steam turbine is comprehensively utilized, the temperature of low-pressure feed water is increased by 20 DEG C, the exhaust temperature of the steam turbine is lowered by 10-15 DEG C, the vacuum is increased by 4-5 kPa, the generating efficiency is increased by more than 10%, the efficiency of the low-parameter steam turbine is greatly improved, the occupied area of the equipment is reduced and the engineering investment is saved.

Description

The steam turbine condenser system

Technical field

The utility model relates to a kind of steam turbine condenser system, relates in particular to the condensation of small capacity exhaust steam in steam turbine, belongs to steam turbine manufacturing and UTILIZATION OF VESIDUAL HEAT IN technical field.

Background technique

The small capacity steam turbine of China is more, especially cogeneration industry, and along with the continuous exhaustion of primary energy, high energy consumption enterprise reduces cost in the hope of increasing competitive ability, and small capacity UTILIZATION OF VESIDUAL HEAT IN steam turbine can increase gradually.By the end of the year 2010; China has more than 200 floatation glass production line to put into operation, and the average energy consumption of float glass is 6500kJ/kg～7500kJ/kg glass liquid, and enterprises such as a large amount of cement production lines, iron and steel, chemical industry, metallurgy are in order to enhance competitiveness; Reduce cost, cogeneration one after another starts.Energy-saving potential is huge.

The small capacity steam turbine is backheat because most not consideration is drawn gas, and the steam turbine energy loss is bigger, primary Calculation; Steam turbine below the single-machine capacity 10000kW, cold source energy reaches more than 30%, if the heat of exhaust steam in steam turbine is used; Can increase substantially steam turbine vacuum, improve generating efficiency, the heat that from exhaust steam in steam turbine, absorbs simultaneously comes low pressure feed water is heated; Improve feed temperature, improve efficiency of boiler.China lacks turbine condenser UTILIZATION OF VESIDUAL HEAT IN technology at present, and the waste heat of steam turbine acting exhaust steam seldom fully utilizes.

The model utility content

The purpose of the utility model is to provide a kind of steam turbine condenser system, makes the waste heat of steam turbine acting exhaust steam obtain comprehensive utilization.

In order to reach above-mentioned purpose, the solution of the utility model is:

A kind of steam turbine condenser system comprises compressor, heater, expansion decompressor, vapour condenser and pipeline; The outlet of compressor is connected to the import of heater through pipeline; The outlet of heater is connected to the inlet of expansion decompressor through pipeline; The outlet of expansion decompressor is connected to the inlet of vapour condenser through pipeline, and the outlet of vapour condenser is connected to the inlet of compressor through pipeline; Exhaust steam in steam turbine is connected to the condensing inlet of vapour condenser, and the condensing outlet of vapour condenser is connected to the cold water outlet of heater, and the hot water mouth of heater is connected to boiler.

Above-mentioned each pipeline is provided with valve.

Adopt such scheme; The utility model utilizes the low boiling point working medium characteristic; Promptly after the high temperature and high pressure gas heating, become a large amount of heat releases of medium temperature and medium pressure liquid meeting, the low pressure feed water temperature in the heating electrical production technology becomes low-temp low-pressure gas after the heat absorption of low-temp low-pressure liquid; Because the temperature of low boiling point working medium boiling and condensation is lower, therefore low-quality thermal source is had broad prospects.After adopting this device, the low pressure feed water temperature improves about 20 ℃, simultaneously the turbine discharge temperature is reduced by 10～15 ℃; Vacuum improves 4～5kpa, and generating efficiency improves more than 10%, increases substantially the low parameter Efficiency of Steam Turbine; Simultaneously; Changing the traditional design mode is the mode that pure condensate formula steam turbine adopts the circulating water cooling, reduces occupation area of equipment, practices thrift construction investment.

Description of drawings

Fig. 1 is the structure and the process flow diagram of the utility model.

Label declaration

Heater 1 low boiling high temperature and high pressure gas medium 2

Low boiling medium temperature and medium pressure liquid medium 3 pipelines 4

Expansion decompressor 6 low boiling low-temp low-pressure liquid mediums 7

Pipeline 8 vapour condenser 10

Low boiling low-temp low-pressure gas medium 11 pipelines 13

Compressor 14 pipelines 15

The condensing 17 condensings outlet 18 that enters the mouth

Cold water outlet 19 hot water mouths 20.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is explained further details.

What need explanation in advance is that the moving direction of all kinds of materials when the arrow among Fig. 1 is represented the utility model operation will detail below no longer one by one.

Technological process when Fig. 1 shows schematic structure and the utility model operation of the utility model.

The steam turbine condenser system of the utility model comprises compressor 14, heater 1, expansion decompressor 6, vapour condenser 10 and pipeline 4, pipeline 8, pipeline 13, pipeline 15.

The outlet of compressor 14 is connected to the import of heater 1 through pipeline 15; The outlet of heater 1 is connected to the inlet of expansion decompressor 6 through pipeline 4; The outlet of expansion decompressor 6 is connected to the inlet of vapour condenser 10 through pipeline 8, and the outlet of vapour condenser 10 is connected to the inlet of compressor 14 through pipeline 13.

Exhaust steam in steam turbine is connected to the condensing inlet 17 of vapour condenser 10, and the condensing outlet 18 of vapour condenser 10 is connected to the cold water outlet 19 of heater 1, and the hot water mouth 20 of heater 1 is connected to boiler.

Pipeline 4, pipeline 8, pipeline 13 and pipeline 15 are provided with valve.

The steam turbine control condensation method of the utility model is:

Exhaust steam after the steam turbine acting gets into vapour condenser 10 through the condensing inlet 17 of vapour condenser 10, and after 7 coolings of low boiling low-temp low-pressure liquid medium, getting into the low pressure feed water systems from the condensing outlet 18 of vapour condenser 10 is the cold water outlet 19 of heater 1.After the low boiling high temperature and high pressure gas medium 2 heat releases heating, by hot water mouth's 20 entering boilers of heater 1, the water that gets into boiler becomes superheated vapor and gets into the steam turbine acting once more, gets into vapour condenser 10 coolings, the water cycle completion in the heater via 1.

Compressor 14 is collapsed into low boiling high temperature and high pressure gas medium 2 with low boiling low-temp low-pressure gas medium 11 in the pipeline 13; Get into heater 1 through pipeline 15, in heater 1, become low boiling medium temperature and medium pressure liquid medium 3 after 2 heat releases of low boiling high temperature and high pressure gas medium, get into expansion decompressor 6 through pipeline 4; Further become low boiling low-temp low-pressure liquid medium 7 after the decompression; Get into vapour condenser 10 through pipeline 8, the heat of steam turbine acting back exhaust steam is taken away in heat absorption, becomes low boiling low-temp low-pressure gas medium 11 after the heat absorption; Get into compressor 1 through pipeline 13 and further pressurize, as next circulation beginning.

The utility model makes full use of the characteristic of low boiling point working medium, and the heat in the exhaust steam in steam turbine is taken away in the heat absorption vaporization in turbine condenser; Improve the unit vacuum; Low boiling low-temp low-pressure gas behind the sucking-off heat becomes the low boiling high temperature and high pressure gas through compressor pressurizes, and the heat that will in vapour condenser, absorb heat release in heater improves boiler feed temperature; Realization is taken away the steam turbine cold source energy and is improved the unit vacuum and then improve unit generation efficient; The heat of taking out of through low boiling point working medium simultaneously improves boiler feed temperature to the further heat release of boiler feed water, and then improves boiler operating efficiency.

In sum, the utility model can reduce the turbine discharge temperature through novel vapour condenser is set, and improves vacuum, through outer heating load heat exchanger is set, improves boiler feed temperature.This model utility can improve generating efficiency more than 10%, but using water wisely 4.2kg during per kilowatt practice thrift 400 yuan of engineering cost during per kilowatt, so this model utility has very huge economic benefit and social benefit.

Can know that by technological general knowledge the utility model can be realized through other the embodiment that does not break away from its spirit or essential feature.Therefore, above-mentioned disclosed embodiment with regard to each side, all just illustrates, and is not only.All in the utility model scope or the change that is being equal in the scope of the utility model all comprised by the utility model.

Claims

1. a steam turbine condenser system is characterized in that: comprise compressor, heater, expansion decompressor, vapour condenser and pipeline; The outlet of compressor is connected to the import of heater through pipeline; The outlet of heater is connected to the inlet of expansion decompressor through pipeline; The outlet of expansion decompressor is connected to the inlet of vapour condenser through pipeline, and the outlet of vapour condenser is connected to the inlet of compressor through pipeline; Exhaust steam in steam turbine is connected to the condensing inlet of vapour condenser, and the condensing outlet of vapour condenser is connected to the cold water outlet of heater, and the hot water mouth of heater is connected to boiler.

2. a kind of steam turbine condenser system as claimed in claim 1 is characterized in that: above-mentioned each pipeline is provided with valve.