CN102031316B - Method for heating cane juice by using waste heat of flue gas of boiler - Google Patents
Method for heating cane juice by using waste heat of flue gas of boiler Download PDFInfo
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- CN102031316B CN102031316B CN 201110001384 CN201110001384A CN102031316B CN 102031316 B CN102031316 B CN 102031316B CN 201110001384 CN201110001384 CN 201110001384 CN 201110001384 A CN201110001384 A CN 201110001384A CN 102031316 B CN102031316 B CN 102031316B
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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
The present invention relates to a kind of method of utilizing boiler flue waste heating sugarcane juice.
Background technology
At present, the boiler in most of sugar refinery is all take bagasse as fuel, the boiler flue temperature is between 160 ℃ to 180 ℃, contain 50% moisture content due to bagasse, the water vapor that produces after burning is blended in stack gas, therefore, the heat enthalpy value of sugar refinery boiler flue is very high, but does not have a sugar refinery to utilize it.The common way in sugar refinery is boiler flue directly to be discharged into after the water spraying and dedusting in atmosphere, and such treatment process makes the heat of boiler flue discharged to atmosphere, has caused very large waste.Studying the low grade heat energy how the recycle boiler flue is taken away, is the energy-saving and cost-reducing important topic in sugar refinery.
Bagasse is the biomass fuel that belongs to environment-friendly type, can not produce the objectionable impurities of polluted product after burning, thus can with processing in sugarcane juice directly contact.Relevant open source literature has been reported and has directly been utilized CO in the boiler flue of sugar refinery
2Method, such as: the people such as He Huazhu are at " stack gas CO
2Full charge, sugarcane juice slag foam isolation technique is in application and the discussion of sulfitation sugar mill clarification process " mention in (periodical name " Guangxi Cane Sugar " .2009 (2) .37-40): CO in boiler flue
2Generate nonsugar in precipitation of calcium carbonate absorption liquid glucose with lime reaction, remove effectively that sugarcane is cured, starch, protein and soluble silicon compound etc., improve cane juice clarification efficient, finally reach the purpose that syrup is purified.This method be with boiler flue after the cold water spraying and dedusting, recycled CO in boiler flue
2, in fact do not utilize the used heat of boiler flue.
Above-mentioned document is not mentioned the problem of the waste heating sugarcane juice that utilizes boiler flue.
Summary of the invention
The purpose of this invention is to provide a kind of method that can effectively utilize boiler flue waste heating sugarcane juice.
For achieving the above object, the present invention adopts the stack gas fly-ash separator, and dust in stack gas is removed, and the stack gas after dedusting enters jet-type direct contact heat transfer tower, directly contacts with the sugarcane juice of spray form, sugarcane juice is heated to the requirement of technique.
The above-mentioned equipment of the method employing of boiler flue waste heating sugarcane juice that utilizes comprises stack gas fly-ash separator, jet-type direct contact heat transfer tower, gas-liquid separator, sugarcane juice pump, wherein boiler flue is received the stack gas fly-ash separator, dust in stack gas is removed, then enter jet-type direct contact heat transfer tower, directly contact with the sugarcane juice of spray form, sugarcane juice is heated to the requirement of technique, the stack gas after cooling enters gas-liquid separator through tower top, separates the backward airborne release of sugarcane juice of carrying secretly; Sugarcane juice is received the sugarcane juice pump, then enters jet-type direct contact heat transfer tower, and the sugarcane juice after heating goes to follow-up workshop section through jet-type direct contact heat transfer tower lower part outlet.
The above-mentioned method of utilizing boiler flue waste heating sugarcane juice be applicable to the to refine sugar technique of the sugarcane juice heating in processing.
The above-mentioned fly-ash separator of the method employing of boiler flue waste heating sugarcane juice that utilizes is selected Wet smoke washing tower, dry type flue gas
The water column that the jet-type direct contact heat transfer tower that the above-mentioned method of utilizing boiler flue waste heating sugarcane juice the adopts vaporific water curtain that to be boiler flue spray with shower nozzle and combined sprinkler spray with reflect the water curtain multiple tracks of splashing and directly contact a kind of heat-exchange equipment that carries out heat exchange.
The present invention compared with prior art, substantive distinguishing features that it is outstanding and significant progress are:
1, the low grade heat energy taken away of recycle boiler flue, remarkable in economical benefits.
2, the method advantages such as maturation, reduced investment, working cost are low, stable operation that possess skills.
Description of drawings
Fig. 1 is the process flow sheet that utilizes the method for boiler flue waste heating sugarcane juice of the present invention.
As shown in Figure 1, utilize the equipment of the method employing of boiler flue waste heating sugarcane juice to comprise: stack gas fly-ash separator 1, jet-type direct contact heat transfer tower 2, gas-liquid separator 3, sugarcane juice pump 4, wherein stack gas fly-ash separator 1 exports the stack gas import of receiving jet-type direct contact heat transfer tower 2, the flue gas outlet on jet-type direct contact heat transfer tower 2 tops is received gas-liquid separator 3 imports, gas-liquid separator 3 top exits lead to atmosphere, sugarcane juice pump 4 is received the sugarcane juice import of jet-type direct contact heat transfer tower 2, and sugarcane juice exports in jet-type direct contact heat transfer tower 2 bottoms.
idiographic flow is as follows: boiler flue is introduced into stack gas fly-ash separator 1, dust in stack gas is removed, stack gas after dedusting enters jet-type direct contact heat transfer tower 2, directly contact with the sugarcane juice of spray form, sugarcane juice is heated to the requirement of technique, and the stack gas after cooling enters gas-liquid separator 3 through tower top, separate after the sugarcane juice carry secretly by gas-liquid separator 3 tops to airborne release, sugarcane juice after separation flows back to jet-type direct contact heat transfer tower 2 through gas-liquid separator 3 bottoms, sugarcane juice is delivered to the sugarcane juice import of jet-type direct contact heat transfer tower 2 by sugarcane juice pump 4, sugarcane juice after heating goes to follow-up workshop section through jet-type direct contact heat transfer tower 2 lower part outlets.
Embodiment
Boiler flue enters Wet smoke washing tower 1, directly contacts with hot water, and dust in stack gas is removed, and hot wash-water recycles after filtering, and the loss part is replenished by hot water more than 90 ℃.stack gas after dedusting enters jet-type direct contact heat transfer tower 2, with directly contact with sugarcane juice in spray form, sugarcane juice is heated to 100 ℃, and the stack gas after cooling enters gas-liquid separator 3 through tower top, separate after the sugarcane juice carry secretly by gas-liquid separator 3 tops to airborne release, sugarcane juice after separation flows back to jet-type direct contact heat transfer tower 2 through gas-liquid separator 3 bottoms, the sugarcane juice that 60 ℃ of sulphur smoke after neutralization is delivered to the sugarcane juice import of jet-type direct contact heat transfer tower 2 by sugarcane juice pump 4, sugarcane juice after heating goes to sedimentation follow-up workshop section through jet-type direct contact heat transfer tower 2 lower part outlets.
Boiler flue enters Wet smoke washing tower 1, directly contacts with hot water, and dust in stack gas is removed, and hot wash-water recycles after filtering, and the loss part is replenished by hot water more than 90 ℃.Stack gas after dedusting enters jet-type direct contact heat transfer tower 2, with directly contact with sugarcane juice in spray form, sugarcane juice is heated to 60 ℃, and the stack gas after cooling enters gas-liquid separator 3 through tower top, separate after the sugarcane juice carry secretly by gas-liquid separator 3 tops to airborne release, sugarcane juice after separation flows back to jet-type direct contact heat transfer tower 2 through gas-liquid separator 3 bottoms, the sugarcane juice that 25 ℃ of sulphur smoke after neutralization is delivered to the sugarcane juice import of jet-type direct contact heat transfer tower 2 by sugarcane juice pump 4, the sugarcane juice after heating goes to follow-up workshop section through jet-type direct contact heat transfer tower 2 lower part outlets.
boiler flue enters dry type smoke duster 1, dust in stack gas is removed, stack gas after dedusting enters jet-type direct contact heat transfer tower 2, with directly contact with sugarcane juice in spray form, sugarcane juice is heated to 100 ℃, and the stack gas after cooling enters gas-liquid separator 3 through tower top, separate after the sugarcane juice carry secretly by gas-liquid separator 3 tops to airborne release, sugarcane juice after separation flows back to jet-type direct contact heat transfer tower 2 through gas-liquid separator 3 bottoms, the sugarcane juice that 60 ℃ of sulphur smoke after neutralization is delivered to the sugarcane juice import of jet-type direct contact heat transfer tower 2 by sugarcane juice pump 4, sugarcane juice after heating goes to sedimentation follow-up workshop section through jet-type direct contact heat transfer tower 2 lower part outlets.
Claims (2)
1. method of utilizing boiler flue waste heating sugarcane juice, it is characterized in that: adopt dry type stack gas fly-ash separator, dust in stack gas is removed, stack gas after dedusting enters jet-type direct contact heat transfer tower, directly contact with the sugarcane juice of spray form, sugarcane juice is heated to the requirement of technique, idiographic flow is as follows: boiler flue is introduced into dry type stack gas fly-ash separator (1), dust in stack gas is removed, stack gas after dedusting enters jet-type direct contact heat transfer tower (2), directly contact with the sugarcane juice of spray form, sugarcane juice is heated to the requirement of technique, and the stack gas after cooling enters gas-liquid separator (3) through tower top, separate after the sugarcane juice carry secretly by gas-liquid separator (3) top to airborne release, sugarcane juice after separation flows back to jet-type direct contact heat transfer tower (2) bottom gas-liquid separator (3), sugarcane juice is delivered to the sugarcane juice import of jet-type direct contact heat transfer tower (2) by sugarcane juice pump (4), sugarcane juice after heating goes to follow-up workshop section through the outlet of jet-type direct contact heat transfer tower (2) bottom,
Described jet-type direct contact heat transfer tower (2) is that boiler flue directly contacts with vaporific water curtain and the water column of combined sprinkler injection and the water curtain multiple tracks that reflection is splashed of shower nozzle injection a kind of heat-exchange equipment that carries out heat exchange.
2. the method for utilizing boiler flue waste heating sugarcane juice according to claim 1, is characterized in that: the technique of the sugarcane juice heating in processing that is applicable to refine sugar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110001384 CN102031316B (en) | 2011-01-06 | 2011-01-06 | Method for heating cane juice by using waste heat of flue gas of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110001384 CN102031316B (en) | 2011-01-06 | 2011-01-06 | Method for heating cane juice by using waste heat of flue gas of boiler |
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| Publication Number | Publication Date |
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| CN102031316A CN102031316A (en) | 2011-04-27 |
| CN102031316B true CN102031316B (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110001384 Expired - Fee Related CN102031316B (en) | 2011-01-06 | 2011-01-06 | Method for heating cane juice by using waste heat of flue gas of boiler |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102703610A (en) * | 2012-05-31 | 2012-10-03 | 韦东 | Method and equipment for utilizing waste heat of evaporated last-effect juice vapor in sugar mill |
| CN103884203B (en) * | 2014-03-25 | 2016-01-20 | 钮德明 | Gas-liquid contact type waste-heat recoverer |
| CN103882155B (en) * | 2014-03-25 | 2015-09-23 | 钮德明 | A kind of method of boiler flue waste heating sugarcane juice |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280344A (en) * | 2008-01-11 | 2008-10-08 | 曾仪飞 | Clarification method for sugarcane juice |
| CN101294227A (en) * | 2008-06-16 | 2008-10-29 | 广西南宁华鑫糖业技术有限责任公司 | Sugar juice air-float clearing method |
| CN101358250A (en) * | 2008-09-25 | 2009-02-04 | 广西永鑫华糖集团有限公司 | Clarification method of flue gas saturated with mixed liquid |
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2011
- 2011-01-06 CN CN 201110001384 patent/CN102031316B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280344A (en) * | 2008-01-11 | 2008-10-08 | 曾仪飞 | Clarification method for sugarcane juice |
| CN101294227A (en) * | 2008-06-16 | 2008-10-29 | 广西南宁华鑫糖业技术有限责任公司 | Sugar juice air-float clearing method |
| CN101358250A (en) * | 2008-09-25 | 2009-02-04 | 广西永鑫华糖集团有限公司 | Clarification method of flue gas saturated with mixed liquid |
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| CN102031316A (en) | 2011-04-27 |
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Granted publication date: 20131106 Termination date: 20160106 |