Heating system of large-scale pure condensing-type steam turbine generator set and heating method

A technology of steam turbine generator set and heating system, which is applied in the direction of steam central heating system, heating system, heating method, etc., can solve the problem of high unit load requirements, limited heating operation mode, incomplete heating system, etc. problems, to achieve the effect of increasing the temperature of the steam supply and preventing the damage of the blades

Pending Publication Date: 2018-11-23
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
View PDF8 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modified heating systems mentioned in these documents are not comprehensive, and focus on the introduction of the application of a single device, the heating s...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Heating system of large-scale pure condensing-type steam turbine generator set and heating method
  • Heating system of large-scale pure condensing-type steam turbine generator set and heating method
  • Heating system of large-scale pure condensing-type steam turbine generator set and heating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Take the steam turbine model N300-16.7 / 538 / 538-9 subcritical, one-time intermediate reheat, two-cylinder, two-exhaust, pure condensing gas unit for heat supply transformation project application as an example. The requirements for heating steam are: the pressure of the steam header 25 is 0.75 MPa (gauge pressure, the pressure unit in the text is gauge pressure); the temperature of the steam supply is required to be greater than 280 °C; the design steam flow rate of the steam supply is 150 t / h. Since the steam supply pressure requirement is not high, steam can be extracted from the medium and low pressure cylinder Unicom pipe for heating. This project adopts the steam supply header 25, the Unicom pipe disc valve 38, the corresponding pipelines, valves and flow, pressure, temperature measuring devices, such as image 3 shown.

[0069] During the test, under the premise that the pressure and temperature of the steam supply meet the requirements of the heating steam paramet...

Embodiment 2

[0073] Take the steam turbine model N320-16.7 / 537 / 537-2 subcritical, one-time intermediate reheat, two-cylinder two-exhaust, pure condensing gas unit for heat supply transformation project application as an example. The requirements for heating steam are: steam header 25 pressure 1.50 MPa, steam supply temperature requirement 355 °C; design heat supply flow rate 150 t / h; terminal steam supply parameters: 1.00 MPa, 240 °C. When the maximum output of the unit is 330MW, the maximum exhaust pressure of the medium-pressure cylinder is 0.84 MPa, so the steam extraction from the connecting pipe of the medium-low pressure cylinder cannot reach the 1.50 MPa pressure required by the 25 pressure of the steam header. The cold section or hot section of the heater extracts steam. For this reason, the project adopts a pressure distributor 22, a steam supply header 25, and corresponding pipelines, valves, and flow, pressure, and temperature measurement devices, such as Figure 4 shown. Durin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a heating system of a large-scale pure condensing-type steam turbine generator set and a heating method. The heating system of the large-scale pure condensing-type steam turbine generator set comprises two high-pressure steam extraction pipelines, a steam mixer, a pressure matcher, two low-pressure steam extraction pipelines, a steam supply header, a high-pressure cylinder,a medium-pressure cylinder and a low-pressure cylinder; the cold section and hot section of a boiler reheater are connected to the steam mixer through two high-pressure steam extraction pipelines respectively, the situation that the overtemperature or excessively-low temperature phenomenon of the boiler reheater is caused by single steam extraction from the cold section or hot section of the boiler reheater is avoided, and meanwhile the problems are solved that due to the single steam extraction from the cold section or hot section of the boiler reheater, the steam feeding and discharging amount of a steam turbine is unbalanced, and the axial force change of a rotor of the steam turbine is large, and the safety of the steam turbine is endangered; the combined steam extraction is achievedthrough the two high-pressure steam extraction pipelines, so that when the steam supply temperature does not meet the steam supply temperature requirement due to the steam extraction of the cold section of the boiler reheater, the effect of increasing the steam supply temperature can be achieved by increasing the steam supply ratio of the hot section of the boiler reheater.

Description

technical field [0001] The invention belongs to the technical field of thermal power generation equipment, and in particular relates to a heat supply system and a heat supply method for a large-scale pure condensing steam turbine generator set. Background technique [0002] Energy saving and emission reduction require central heating to close scattered coal-fired small boilers. The main measure to achieve central heating is to transform large-scale pure condensing steam turbine generator sets. One large generating set can satisfy multiple heat users. The production steam demand of the enterprise. Domestically, pure condensing steam generating units have been carried out for the transformation and application of heating technology. [0003] In a traditional large-scale pure condensing steam turbine generator set, the high-pressure cylinder, medium-pressure cylinder and low-pressure cylinder are sequentially connected on the same axis through their respective rotors; the boil...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F01K11/02F01K17/02F01D15/10F24D1/02
CPCF01D15/10F01K11/02F01K17/02F24D1/02
Inventor 文立斌吴健旭廖卫国
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap