CN102329834A - End-efficiency juice steam recovery method in starch sugar production - Google Patents
End-efficiency juice steam recovery method in starch sugar production Download PDFInfo
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- CN102329834A CN102329834A CN201110292407A CN201110292407A CN102329834A CN 102329834 A CN102329834 A CN 102329834A CN 201110292407 A CN201110292407 A CN 201110292407A CN 201110292407 A CN201110292407 A CN 201110292407A CN 102329834 A CN102329834 A CN 102329834A
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Abstract
The invention belongs to recovery of end-efficiency juice steam, and particularly relates to an end-efficiency juice steam recovery method in starch sugar production. The end-efficiency juice steam recovery method comprises the following steps of: importing starch milk into an evaporation-jet type direct heat exchanger, and then entering a liquefying mixing tank added with amylase; and carrying out heat exchange on the evaporated end-efficiency juice steam in the starch sugar production with the starch milk to rise the temperature, and importing the starch milk after temperature rise into the liquefying mixing tank added with the amylase in the liquefying procedure. In the end-efficiency juice steam recovery method, the problems that the energy waste is large, the energy consumption is high, the environmental pollution is caused and the like in the prior art are solved; and the end-efficiency juice steam recovery method has the advantages that the consumption of water resource and energy brought by circulating water can be effectively saved, the pollution caused by discharge is greatly reduced, the energy consumption of the starch milk in the subsequent temperature-rising liquefying process is effectively reduced, the investment cost is less, and the like.
Description
Technical field
The invention belongs to the recovery of final-effect juice steam, be meant the final-effect juice steam recovery method in the Dian Fentang production especially.
Background technology
In the production of Dian Fentang; The degree Beaume of milk of starch generally is controlled at 18-18.5, and the solid substance of saccharification liquid is 33%-35% after liquefaction and saccharification like this, and the solid substance that the Dian Fentang finished product requires is generally more than 71%; So will utilize multiple-effect evaporator that the water in the liquid glucose is evaporated a part on the technology; And evaporative process will be used HP steam, and the moisture that steams also will become steam, and this steam is called juice vapour; Also be secondary steam, the secondary steam of imitating generation at the end of vapo(u)rization system is final-effect juice steam.Evaporated final-effect juice steam recycles drain into the cooling tower cooling through the Water Jet Condenser condensation and with water coolant after.Evaporated final-effect juice steam is containing a large amount of heats; Existing technology is to absorb with a large amount of cooling circulating waters; The problem of four aspects below above-mentioned existing technology exists: the one, the final-effect juice steam temperature generally at 50 ℃-60 ℃, is containing great amount of heat energy, absorbs with water coolant and has caused great energy dissipation.The 2nd, final-effect juice steam has micro sugar and small organic molecule, pollutes recirculated cooling water, causes COD increase in the recirculated water, causes circulating water quality to degenerate, and the consequence that causes is constantly to come water coolant by turns with fresh water, has increased the consumption of water resources.The 3rd, because the evaporated final-effect juice steam heat is huge,, move in circles like this so must absorb with a large amount of recirculated cooling waters, use large-scale centrifugal water pump that power is provided, consume a large amount of electric energy.Also will use cooling tower to the recirculated cooling water cooling, the use of blower fan has also increased the consumption of electric energy.The 4th, a large amount of heats that recirculated water absorbs will pass through the cooling tower cooling, and a large amount of heats and steam will enter in the atmosphere, cause atmospheric pollution.
Summary of the invention
The object of the present invention is to provide a kind of Dian Fentang final-effect juice steam recovery method in producing, when effectively addressing the above problem, improved the temperature of milk of starch, thereby reduced the heat up heat energy loss of required consumption of milk of starch.
Overall technology design of the present invention is:
Evaporated final-effect juice steam recovery method during Dian Fentang is produced comprises milk of starch is imported evaporation injection formula direct heat exchanger, reentered and add in the diastatic liquefaction modulation jar; Evaporated final-effect juice steam in the Dian Fentang production and milk of starch are carried out heat exchange heat exchange intensification, the milk of starch input liquefaction after heating up is added diastatic liquefaction modulation jar.
Process step and process method concrete among the present invention are:
For stablizing the temperature of final-effect juice steam, improve the utility value of final-effect juice steam, optimized technical scheme is, the vacuum tightness that produces the last evaporator of evaporated final-effect juice steam is-0.084MPa～-0.088MPa.
For increasing the contact area of final-effect juice steam and milk of starch; To realize heat exchange effect preferably, effectively improve the temperature rise of milk of starch, optimized technical scheme is; Evaporated final-effect juice steam is through the jet-type direct heat exchanger, with the direct contact heat-exchanging of milk of starch of delivering to the shower nozzle injection with dehvery pump.
As the main raw material in the Dian Fentang production, the milk of starch temperature before heating up is 24 ℃～30 ℃.
Diastatic liquefaction modulation jar is sized mixing, added to milk of starch after the intensification through the input of milk of starch transferpump, is warmed up to 105 ℃～110 ℃ again and liquefies.
For further improving the utility value of final-effect juice steam, make full use of it and contain afterheat utilization value, optimized technical scheme is that remaining uncooled evaporated final-effect juice steam input condensing surface carries out condensation after the heat exchange.
For ease of collecting condensed product, optimized technical scheme is that condensing surface is provided with condensation-water drain and non-condensable gases drain.
The substantive distinguishing features that the present invention obtained is with significant technical progress:
Adopt the final-effect juice steam that produces in the method recycling Dian Fentang of the present invention production; The energy consumption that brings of conserve water resource and recirculated water effectively; Reduced the pollution that brings because of discharging significantly; Improved the temperature of milk of starch, the energy consumption of milk of starch in follow-up intensification liquefaction process effectively reduced, and input cost is little.
Embodiment
Below in conjunction with embodiment the present invention is done and to further describe; But conduct is not to qualification of the present invention; Protection scope of the present invention is as the criterion with the content of claim record, and any equivalence techniques means replacement of having done according to this specification sheets does not all break away from protection category of the present invention.
Evaporated final-effect juice steam recovery method during Dian Fentang is produced comprises diastatic liquefaction modulation jar is sized mixing, added in the milk of starch input; Evaporated final-effect juice steam in the Dian Fentang production and milk of starch are carried out heat exchange heat exchange intensification, the milk of starch input liquefaction after heating up is added diastatic liquefaction modulation jar.
The vacuum tightness that produces the last evaporator of evaporated final-effect juice steam is-0.084MPa～-0.088MPa, the temperature of final-effect juice steam is about about 62 ℃.
Evaporated final-effect juice steam is through the jet-type direct heat exchanger, with the direct contact heat-exchanging of milk of starch of delivering to the shower nozzle injection with dehvery pump.
Milk of starch temperature before heating up is 25 ℃.
Diastatic liquefaction modulation jar is sized mixing, added to milk of starch after the intensification through the input of milk of starch transferpump, is warmed up to 105 ℃～110 ℃ again and liquefies.
Remaining uncooled evaporated final-effect juice steam input condensing surface carries out condensation after the heat exchange.Condensing surface is provided with condensation-water drain and non-condensable gases drain.
The Economic and Efficiency Analysis of present embodiment is following:
The steady-state evaporation technological operation is imitated vaporization temperature with the end and is controlled at about 62 ℃, adopts the jet-type direct heat exchanger, and the heat energy with milk of starch absorption evaporated final-effect juice steam can rise to the milk of starch temperature about 60 ℃ from 25 ℃.To handle the milk of starch amount day is that the Dian Fentang production line of 300t/d is an example, and the milk of starch specific heat of 18 Baumes is pressed 0.8 times of calculating of water, and getting 25 ℃～60 ℃ specific heat of waters is 4.178 KJ/kg. ℃.The 300t milk of starch is risen to 60 ℃ from 25 ℃, efficient recovery and utilize the heat of evaporated final-effect juice steam to be:
Q=?cw（t
2-t
1）
=4.178×0.8×300000×（60-25）
=35095200?KJ/d
The performance analysis of economizing on coal of used heat utilization (consumption of standard coal equivalent)
The fuel of boiler mainly is coal, and the net calorific value of standard coal equivalent is 29300kJ/kg, and the thermo-efficiency of boiler is 65%, and year stream day was by 330 days.Utilizing the heat of waste heat of evaporated final-effect juice steam heating milk of starch is 35095200KJ/h, amounts to the standard coal equivalent amount and is:
T=35095200×330÷29300÷0.65=608108kg
Common coal (heat is 24244 kJ/kg) valency is by 780 yuan of calculating per ton, and the standard coal price of amounting to is 942 yuan per ton, and therefore, annual fuel cost of practicing thrift is:
F
1=942 * 608.108=572837.74 (unit)
Claims (7)
1. the evaporated final-effect juice steam recovery method during Dian Fentang is produced comprises milk of starch is imported evaporation injection formula direct heat exchanger, added diastatic liquefaction modulation jar by sizing mixing; It is characterized in that evaporated final-effect juice steam in the Dian Fentang production and milk of starch are carried out heat exchange heat exchange intensification, the milk of starch input liquefaction operation after heating up is added diastatic liquefaction modulation jar.
2. the evaporated final-effect juice steam recovery method during Dian Fentang according to claim 1 is produced, it is characterized in that producing evaporated final-effect juice steam last evaporator vacuum tightness for-0.084MPa～-0.088MPa.
3. the evaporated final-effect juice steam recovery method during Dian Fentang according to claim 1 and 2 is produced is characterized in that evaporated final-effect juice steam passes through the jet-type direct heat exchanger, with the direct contact heat-exchanging of milk of starch of delivering to the shower nozzle injection with dehvery pump.
4. the evaporated final-effect juice steam recovery method during Dian Fentang according to claim 1 is produced is characterized in that the milk of starch temperature before the described intensification is 24 ℃～30 ℃.
5. the evaporated final-effect juice steam recovery method in producing according to the described Dian Fentang of claim 1 is characterized in that the milk of starch after the described intensification adds diastatic liquefaction modulation jar through milk of starch transferpump input liquefaction.
6. the evaporated final-effect juice steam recovery method during Dian Fentang according to claim 1 is produced, it is characterized in that heat exchange after remaining uncooled evaporated final-effect juice steam input condensing surface carry out condensation.
7. the evaporated final-effect juice steam recovery method during Dian Fentang according to claim 6 is produced is characterized in that condensing surface is provided with condensation-water drain and non-condensable gases drain.
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| CN201110292407A CN102329834A (en) | 2011-09-29 | 2011-09-29 | End-efficiency juice steam recovery method in starch sugar production |
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| CN201110292407A CN102329834A (en) | 2011-09-29 | 2011-09-29 | End-efficiency juice steam recovery method in starch sugar production |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103031388A (en) * | 2012-12-21 | 2013-04-10 | 菱花集团有限公司 | Recycling method of liquefied waste heat during starch sugar production process |
| CN106916864A (en) * | 2017-02-17 | 2017-07-04 | 武汉中粮食品科技有限公司 | A kind of method and system of sugaring |
| CN108286908A (en) * | 2018-01-25 | 2018-07-17 | 中山中珠环保科技有限公司 | A kind of method of Waste Heat Recovery and recycling in starch sugar production process |
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| CN101012467A (en) * | 2007-01-04 | 2007-08-08 | 李安民 | Processes and apparatus for hidden-heat recovery and utilization of liquefied fermented glutinous rice |
| CN201470391U (en) * | 2009-09-01 | 2010-05-19 | 兆光生物工程(邹平)有限公司 | Starch sugar manufacturing liquefying evaporating integrated machine |
| CN101857906A (en) * | 2010-06-02 | 2010-10-13 | 钮德明 | Method for recycling hot water of sugar refinery and waste heat of evaporated final-effect juice steam |
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2011
- 2011-09-29 CN CN201110292407A patent/CN102329834A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101012467A (en) * | 2007-01-04 | 2007-08-08 | 李安民 | Processes and apparatus for hidden-heat recovery and utilization of liquefied fermented glutinous rice |
| CN201470391U (en) * | 2009-09-01 | 2010-05-19 | 兆光生物工程(邹平)有限公司 | Starch sugar manufacturing liquefying evaporating integrated machine |
| CN101857906A (en) * | 2010-06-02 | 2010-10-13 | 钮德明 | Method for recycling hot water of sugar refinery and waste heat of evaporated final-effect juice steam |
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| 钮德明: "淀粉糖蒸发末效汁汽的废热回收及利用", 《食品工业》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103031388A (en) * | 2012-12-21 | 2013-04-10 | 菱花集团有限公司 | Recycling method of liquefied waste heat during starch sugar production process |
| CN106916864A (en) * | 2017-02-17 | 2017-07-04 | 武汉中粮食品科技有限公司 | A kind of method and system of sugaring |
| CN106916864B (en) * | 2017-02-17 | 2020-03-17 | 武汉中粮食品科技有限公司 | Method and system for making sugar |
| CN108286908A (en) * | 2018-01-25 | 2018-07-17 | 中山中珠环保科技有限公司 | A kind of method of Waste Heat Recovery and recycling in starch sugar production process |
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Application publication date: 20120125 |