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Recycling system for heat and moisture in flue gas of coal-fired power plant and recycling method of recycling system

A coal-fired power plant, flue gas technology, applied in the field of power plant energy saving, can solve the problem of no recycling, achieve the effect of reducing water evaporation and solving the problem of applicability

Active Publication Date: 2014-12-03
HUADIAN ENVIRONMENTAL PROTECTION ENG & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no system and recovery method for recovering moisture and heat energy in the flue gas in the world at present.

Method used

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  • Recycling system for heat and moisture in flue gas of coal-fired power plant and recycling method of recycling system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1 of the present invention: as figure 1 As shown, a heat and moisture recovery system in the flue gas of a coal-fired power plant includes a boiler 1, an air preheater 2, an electrostatic precipitator 3, a desulfurization tower 4, and a chimney 5 connected in sequence. A primary heat exchanger 6 is arranged between them, and the primary heat exchanger 6 is connected to the boiler 1 through pipes; a secondary heat exchanger 7 is arranged between the desulfurization tower 4 and the chimney 5 . A blower 8 is provided on the secondary heat exchanger 7 . The primary heat exchanger 6 adopts a low-temperature economizer, and the secondary heat exchanger 7 adopts an air-cooled condenser.

[0022] A method for recovering heat and moisture in flue gas using the aforementioned system, comprising the following steps:

[0023] In step a, the high-temperature flue gas discharged from the boiler 1 passes through the air preheater 2 and the electrostatic precipitator 3 and...

Embodiment 2

[0026] Embodiment 2 of the present invention: as figure 1 As shown, a heat and moisture recovery system in the flue gas of a coal-fired power plant includes a boiler 1, an air preheater 2, an electrostatic precipitator 3, a desulfurization tower 4, and a chimney 5 connected in sequence. A primary heat exchanger 6 is arranged between them, and the primary heat exchanger 6 is connected to the boiler 1 through pipes; a secondary heat exchanger 7 is arranged between the desulfurization tower 4 and the chimney 5 . A blower 8 is provided on the secondary heat exchanger 7 . Both the primary heat exchanger 6 and the secondary heat exchanger 7 adopt low-temperature economizers.

[0027] A method for recovering heat and moisture in flue gas using the aforementioned system, comprising the following steps:

[0028] In step a, the high-temperature flue gas discharged from the boiler 1 passes through the air preheater 2 and the electrostatic precipitator 3 and then enters the primary heat...

Embodiment 3

[0031] Embodiment 3 of the present invention: as figure 1 As shown, a heat and moisture recovery system in the flue gas of a coal-fired power plant includes a boiler 1, an air preheater 2, an electrostatic precipitator 3, a desulfurization tower 4, and a chimney 5 connected in sequence. A primary heat exchanger 6 is arranged between them, and the primary heat exchanger 6 is connected to the boiler 1 through pipes; a secondary heat exchanger 7 is arranged between the desulfurization tower 4 and the chimney 5 . A blower 8 is provided on the secondary heat exchanger 7 . The primary heat exchanger 6 adopts a low-temperature economizer, and the secondary heat exchanger 7 adopts an air condenser.

[0032] A method for recovering heat and moisture in flue gas using the aforementioned system, comprising the following steps:

[0033]In step a, the high-temperature flue gas discharged from the boiler 1 passes through the air preheater 2 and the electrostatic precipitator 3 and then en...

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Abstract

The invention discloses a recycling system for heat and moisture in flue gas in a coal-fired power plant and a recycling method of the recycling system. The recycling system comprises a boiler (1), an air preheater (2), an electric dust collector (3), a desulphurization tower (4) and a chimney (5) which are sequentially connected, a primary heat exchanger (6) is arranged between the electric dust collector (3) and the desulphurization tower (4) and connected with the boiler (1) by a pipeline, and a secondary heat exchanger is disposed between the desulphurization tower (4) and the chimney (5). The moisture in the flue gas can be recycled, the waste heat in the flue gas can be sufficiently utilized, water consumption of the power plant can be effectively reduced, and energy utilization rate is effectively improved. In addition, partial sulfur dioxide and mercury elements in the flue gas can be removed, and pollution of the flue gas of the power plant to air is reduced.

Description

technical field [0001] The invention relates to a recovery system for heat and moisture in flue gas of a coal-fired power plant and a recovery method thereof, belonging to the field of power plant energy conservation. Background technique [0002] my country is a country that is extremely scarce in water resources. The total amount of fresh water resources is 2,800 billion cubic meters, and the per capita is only 2,300 cubic meters. Even less, only about 1.1 trillion cubic meters, and the per capita usable water resources are about 900 cubic meters. my country's per capita water resources are only equivalent to 1 / 4 of the world's per capita water resources. More than 400 of the more than 600 cities across the country have insufficient water supply. In 2003, 157 cities suffered from severe water shortages, and the annual total of water shortages in cities across the country reached 6 billion cubic meters. Experts predict that China's population will reach a peak of 1.6 billio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D17/00
CPCY02P10/25
Inventor 汪洋陶爱平谷吉林胡永锋沈煜晖孙路长李超金颖姗
Owner HUADIAN ENVIRONMENTAL PROTECTION ENG & TECH