Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Equivalent enthalpy drop determination method for two-path mixed feeding low-pressure coal economizer

A low-pressure economizer and a technology for determining methods, which are applied in feed water heaters, preheating, steam generation, etc., can solve the problem of inability to evaluate the optimal operation of economical power plants, and the inability to accurately and effectively confirm the thermal efficiency of low-pressure economizers after two-way mixing And other issues

Inactive Publication Date: 2013-07-31
SHANDONG ELECTRIC POWER RES INST +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing books related to equivalent enthalpy drop only introduce the analysis and calculation methods for the one-way inlet low-pressure economizer, but do not involve the system analysis and calculation method for the design of two-way mixing and backward low-pressure economizers, so it is impossible to accurately and effectively confirm the two The thermal efficiency of the low-pressure economizer after road mixing, so it is impossible to evaluate its economy and guide the optimal operation of the power plant

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
  • Equivalent enthalpy drop determination method for two-path mixed feeding low-pressure coal economizer
  • Equivalent enthalpy drop determination method for two-path mixed feeding low-pressure coal economizer
  • Equivalent enthalpy drop determination method for two-path mixed feeding low-pressure coal economizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0047] figure 1 The system diagram of the present invention is given, it connects the same low pressure economizer 1 at the outlet of #7 low plus 4 and the outlet of #8 low plus 5, and then the outlet of low pressure economizer is connected with the outlet of #5 low plus 2 After connecting, connect with deaerator 6 again.

[0048] Method of the present invention is:

[0049] 1. The #7 low-gas outlet is connected to the low-pressure economizer and connected to the #5 low-gas outlet, such as figure 2 Shown:

[0050] δη 1 =(α d1 *((h d -h 5 )*η 4 +T 6 *η 6 +T 5 *η 5 ) / H)*100%

[0051] δη 1 ----- Relative increase percentage of unit thermal efficiency

[0052] alpha d1 ------#7 Low feed low pressure economizer flow relative to main steam flow share

[0053] h d -------- Low pressure economizer outlet water enthalpy

[0054] h 5 --------...

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 relates to an equivalent enthalpy drop determination method for a two-path mixed feeding low-pressure coal economizer. The method is simple and has small operating amount. The method comprises the following steps of: calculating fractional flow of each path according to a thermal balance method; partitioning an entire system into two paths according to different low pressure heatersconnected with the inlet of the low-pressure coal economizer; calculating the benefits delta eta 1 and delta eta 2 of the two paths of low-pressure coal economizers respectively; adding the benefits delta eta 1 and delta eta 2 together so as to obtain total benefit delta eta=delta eta 1+delta eta 2 of the low-pressure coal economizer.

Description

technical field [0001] The invention relates to a method for determining the equivalent enthalpy drop of a two-way mixed-inlet low-pressure economizer. Background technique [0002] The low-pressure economizer of Unit #5 of Centennial Electric Power Development Co., Ltd. was designed and installed by Shandong Huate Company. After heating, go to the #5 low-load outlet, so that the waste heat of the flue gas can be used to improve the thermal efficiency of the unit. Existing books related to equivalent enthalpy drop only introduce the analysis and calculation methods for the one-way inlet low-pressure economizer, but do not involve the system analysis and calculation method for the design of two-way mixing and backward low-pressure economizers, so it is impossible to accurately and effectively confirm the two The thermal efficiency of the low-pressure economizer after road mixing cannot evaluate its economy and guide the optimal operation of the power plant. Contents of the...

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
Patent Type & Authority Patents(China)
IPC IPC(8): F22D1/32
Inventor 董洋
Owner SHANDONG ELECTRIC POWER RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com