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Method for heating cane juice by using waste heat of flue gas of boiler

A boiler flue and flue gas technology, applied in lighting and heating equipment, applications, cane sugar production, etc., can solve the problem of not mentioning heating cane juice, etc., and achieve the effects of significant economic benefits, low operating costs, and stable operation.

Inactive Publication Date: 2011-04-27
钮德明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned literature does not mention the problem of using the waste heat of boiler flue gas to heat cane juice

Method used

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  • Method for heating cane juice by using waste heat of flue gas of boiler
  • Method for heating cane juice by using waste heat of flue gas of boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Boiler flue gas enters the wet flue gas scrubber 1 and directly contacts with hot water to remove dust from the flue gas. The hot water for washing is filtered and recycled, and the lost part is replaced by hot water above 90°C. The flue gas after dedusting enters the spray type direct contact heat exchange tower 2, and directly contacts with the sprayed neutralized sugarcane juice to heat the sugarcane juice to 100°C, and the cooled flue gas enters the gas-liquid separator through the top of the tower 3. After separating the entrained sugarcane juice, it is discharged into the air from the top of the gas-liquid separator 3, and the separated sugarcane juice flows back to the jet-type direct contact heat exchange tower 2 through the bottom of the gas-liquid separator 3. After neutralizing by sulfur fumigation at 60°C The sugarcane juice is sent to the cane juice inlet of the jet direct contact heat exchange tower 2 by the cane juice pump 4, and the heated cane juice goes...

Embodiment 2

[0020] Boiler flue gas enters the wet flue gas scrubber 1 and directly contacts with hot water to remove dust from the flue gas. The hot water for washing is filtered and recycled, and the lost part is replaced by hot water above 90°C. The flue gas after dedusting enters the jet type direct contact heat exchange tower 2, and directly contacts with the sprayed neutralized sugarcane juice to heat the sugarcane juice to 60°C, and the cooled flue gas enters the gas-liquid separator through the top of the tower 3. After separating the entrained sugarcane juice, it is discharged into the air from the top of the gas-liquid separator 3, and the separated sugarcane juice flows back to the jet-type direct contact heat exchange tower 2 through the bottom of the gas-liquid separator 3. After neutralization by sulfur fumigation at 25°C The cane juice is sent to the cane juice inlet of the jet direct contact heat exchange tower 2 by the cane juice pump 4, and the heated cane juice goes to th...

Embodiment 3

[0022] The boiler flue gas enters the dry flue gas dust collector 1 to remove the dust in the flue gas, and the flue gas after dust removal enters the jet-type direct contact heat exchange tower 2, and directly contacts with the sprayed neutralized cane juice to remove the cane The juice is heated to 100°C, and the cooled flue gas enters the gas-liquid separator 3 through the top of the tower, the entrained sugarcane juice is separated and discharged from the top of the gas-liquid separator 3 to the air, and the separated sugarcane juice passes through the gas-liquid separator 3. The bottom flows back to the jet-type direct contact heat exchange tower 2. The cane juice neutralized by sulfur fumigation at 60°C is sent by the cane juice pump 4 to the cane juice inlet of the jet-type direct contact heat exchange tower 2. The heated cane juice is sprayed direct contact with the outlet of the lower part of the heat exchange tower 2 to settle the follow-up section.

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Abstract

The invention relates to a method for heating cane juice by using waste heat of flue gas of a boiler. The technical flow comprises the following steps of: introducing flue gas of the boiler into a flue gas dust collector 2; removing dust in the flue gas; introducing the flue gas from which dust is removed into a jet direct contact heat exchange tower 2; directly contacting the flue gas with mist cane juice; heating the cane juice until process requirement is met; introducing cooled flue gas into a gas and liquid separator 3 from the top of the tower; discharging separated and entrained cane juice from the top of the gas and liquid separator 3 to the air; allowing separated cane juice to flow from the bottom of the gas and liquid separator 3 back to the jet direct contact heat exchange tower 2; feeding the cane juice to the cane juice inlet of the jet direct contact heat exchange tower 2 by using a cane juice pump 4; and discharging heated cane juice from the lower outlet of the jet direct contact heat exchange tower 2 to a subsequent working section. The method recycles and uses a large amount of waste heat of the flue gas of the boiler for a sugar making enterprise and has the advantages of mature technology, small investment, remarkable economic benefit, stability in operation and the like.

Description

technical field [0001] The invention relates to a method for heating cane juice by utilizing waste heat of boiler flue gas. Background technique [0002] At present, most of the boilers in sugar factories use bagasse as fuel, and the temperature of the boiler flue gas is between 160°C and 180°C. Since bagasse contains 50% water, the water vapor generated after combustion is mixed in the flue gas. Therefore, the enthalpy value of flue gas from sugar factory boilers is high, but none of the sugar factories utilize it. The usual practice in sugar factories is to discharge the boiler flue gas directly into the atmosphere after water spraying and dedusting. This treatment method makes the heat of the boiler flue gas exhaust to the atmosphere, causing a lot of waste. Research on how to recover and utilize the low-grade heat energy taken away by boiler flue gas is an important topic for energy saving and consumption reduction in sugar factories. [0003] Bagasse is an environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13B50/00F28C3/06
Inventor 钮德明
Owner 钮德明
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