Pre-drying brown coal power generation system integrated with air heater and pre-drying brown coal power generation method

A technology of power generation system and air heater, which is applied in the direction of combustion method, dry solid material, dry gas arrangement, etc. It can solve the problems of power generation system efficiency decline, boiler exhaust temperature rise, steam turbine output reduction, etc., and achieve power regulation process The effect of continuous, efficient operation and shortened payback period

Active Publication Date: 2016-11-09
XI AN JIAOTONG UNIV
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional air heater uses steam extraction from the steam turbine as the heat source, but this will reduce the output of the steam turbine, and the operation of the air h

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
  • Pre-drying brown coal power generation system integrated with air heater and pre-drying brown coal power generation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings

[0027] like figure 1 As shown, the present invention is a pre-dried lignite power generation system with integrated air heater, including a boiler 1, a steam turbine 2, a generator 24, a condenser 3, a cooling tower 4, a condensate pump 5, a heat recovery system, a drying system and a heating system. The blower system, according to the water flow direction, the heat recovery system includes the first to third high pressure heaters 25-27, the deaerator 26 and the first to fourth low pressure heaters 29-32 connected in sequence, and the drying system includes raw coal preheating 9, coal crusher 10, fluidized bed dryer 11 with built-in heater, dust collector 12, fan 13, coal pulverizer 14, and the heater system includes a drying exhaust waste heat recovery device 6, a first valve 15, a first A pump 16 , a second pump 17 , a second valve 18 , a third pump 19 , a ...

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 pre-drying brown coal power generation system integrated with an air heater and a pre-drying brown coal power generation method. The system comprises a coal-fired power generation system body, a brown coal preheater, a superheated steam fluidized bed drier with an internal heater, an air heater system body and the like. An outlet of the brown coal preheater is connected with an inlet of the superheated steam fluidized bed drier with the internal heater, an outlet of the drier is connected with an inlet of a coal mill, and part of moisture in brown coal is removed in the drier. A heat source inlet of the internal heater is connected with a steam extraction opening of a certain level of a turbine, and an outlet of the internal heater is connected with the hydrophobic side of a corresponding reheating heater. The operation mode of the air heater system changes according to different loads of the air heater. The air heater system can safely and efficiently work in different seasons under different brown coal moisture contents and different dry degrees, waste heat of smoke exhausted from a boiler and waste heat of dried tail gas can be utilized at the same time, and the adverse influence of operation of the air heater on power generation efficiency is eliminated.

Description

Technical field: [0001] The invention belongs to the field of coal-fired thermal power generation, and in particular relates to a pre-dried lignite power generation system and method with an integrated air heater. Background technique: [0002] Lignite is a kind of inferior coal with high water content, high volatile content, high ash content, low calorific value and easy spontaneous combustion. Lignite reserves are huge, easy to mine and generally low in price. The total moisture of lignite is generally between 30% and 60%, and direct combustion will lead to low power generation efficiency, which restricts the application of lignite in the field of thermal power generation. my country's lignite is mainly distributed in the eastern part of Inner Mongolia, where the winter is cold and long. In order to ensure the safe operation of the air preheater, it is necessary to operate the air heater. The traditional air heater uses the steam extracted from the steam turbine as the h...

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): F26B3/08F26B21/00F26B23/00F26B25/00F23K1/00F22D1/34
CPCF22D1/34F23K1/00F26B21/001F26B21/005F26B23/001F26B25/005Y02P70/10
Inventor 车得福朱信王长安唐春丽
Owner XI AN JIAOTONG UNIV
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