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A flue gas waste heat recovery system and its recovery method and application

A flue gas waste heat and recovery system technology, applied in the field of flue gas waste heat recovery, can solve problems such as cost increase, achieve the effects of improving efficiency, improving economic benefits, and optimizing heat utilization methods

Active Publication Date: 2017-03-08
SHANGHAI YOUHUA PROCESS INTEGRATED TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the above systems improve the thermal efficiency of the heating furnace, they all need to add additional equipment, which increases the cost

Method used

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  • A flue gas waste heat recovery system and its recovery method and application
  • A flue gas waste heat recovery system and its recovery method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment adopts as figure 1 The system shown in the figure recovers waste heat from the flue gas. The fuel and the air heated by the air preheater 4 from the blower 6 enter the radiant chamber 1 of the heating furnace, and the flue gas leaving the radiant chamber 1 of the heating furnace passes through the flue gas from the convection chamber 2 of the heating furnace. The inlet enters the furnace body 8, and the material is directly added to the material inlet of the steam drum 7. Part of the liquid in the steam drum 7 enters the evaporation section 9 from the downcomer of the steam drum 7 to be heated and starts to produce steam, and a part of the liquid material becomes steam to form a gas-liquid mixture. , the gas-liquid mixture leaves the evaporation section 9 and enters the steam drum 7, where gas-liquid separation is carried out in the steam drum 7, and the liquid falls into the liquid space in the steam drum 7; another part of the liquid in the steam drum 7...

Embodiment 2

[0039] Except that the coal-saving section 11 in the convection chamber 2 of the heating furnace is extracted while one furnace tube in the evaporation section 9 in the convection chamber 2 of the heating furnace is extracted, other processes are uniformly the same as in Example 1.

[0040] It raises the temperature of flue gas at the exit of the convection chamber 2 of the heating furnace to 250-350°C, which in turn can effectively increase the temperature of the air entering the radiation chamber of the heating furnace, and finally achieve the purpose of rationally optimizing the heat energy distribution of the flue gas and reducing the fuel consumption of the heating furnace.

Embodiment 3

[0042] Except that the coal-saving section 11 in the convection chamber 2 of the heating furnace is extracted and three furnace tubes in the evaporation section 9 in the convection chamber 2 of the heating furnace are extracted, other processes are uniformly the same as in Example 1.

[0043] It raises the temperature of flue gas at the exit of the convection chamber 2 of the heating furnace to 250-350°C, which in turn can effectively increase the temperature of the air entering the radiation chamber of the heating furnace, and finally achieve the purpose of rationally optimizing the heat energy distribution of the flue gas and reducing the fuel consumption of the heating furnace.

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Abstract

The invention provides a flue gas waste heat recovery system and a recovery method and application thereof. The flue gas waste heat recovery system comprises a heating furnace radiation chamber, a heating furnace convection chamber, an air pre-heater, an induced draft fan, an air blower and a chimney. The heating furnace radiation chamber, the heating furnace convection chamber, the air pre-heater, the induced draft fan and the chimney are connected in sequence, and an outlet of the air blower is connected with the air inlet of the air pre-heater and the air inlet of the heating furnace radiation chamber. A material is fed into a steam pocket, a steam pocket downtake pipe is connected with an evaporation section inlet and a steam pocket inlet, an evaporation section outlet is connected with a steam pocket steam inlet, and a steam pocket steam outlet is connected with a superheat section inlet. The air pre-heater is added between the heating furnace convection chamber and the chimney of the flue gas waste heat recovery system, a flue gas heat utilization mode is reasonably optimized between a heating furnace and a waste heat boiler according to the situations of public works in the whole system under the situation that change of an original convection chamber is very small, and heat utilization value and economic benefit are improved.

Description

technical field [0001] The field of flue gas waste heat recovery of the present invention, in particular, relates to a flue gas waste heat recovery system and its recovery method and application for transforming a heating furnace, and particularly relates to a flue gas waste heat recovery system based on transforming a heating furnace that generates steam in a convection chamber Recycling systems and their recycling methods and uses. Background technique [0002] Flue gas waste heat resources belong to secondary energy, which is the product of primary energy or combustible material conversion, or the heat generated during fuel combustion after completing a certain process. [0003] In the process of using the heating furnace to provide heat for the process, the liquid (gas) fuel is burned in the radiation chamber (hearth) of the heating furnace to generate high-temperature flue gas and use it as a heat carrier, flow to the convection chamber, and then discharge from the chim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22B1/18F22D1/36
Inventor 王剑峰孙虎良沈雪松
Owner SHANGHAI YOUHUA PROCESS INTEGRATED TECH CO LTD
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