CN103060480A - Plate-type evaporator and application thereof to evaporation system in refined sugar factory - Google Patents
Plate-type evaporator and application thereof to evaporation system in refined sugar factory Download PDFInfo
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- CN103060480A CN103060480A CN2011103155119A CN201110315511A CN103060480A CN 103060480 A CN103060480 A CN 103060480A CN 2011103155119 A CN2011103155119 A CN 2011103155119A CN 201110315511 A CN201110315511 A CN 201110315511A CN 103060480 A CN103060480 A CN 103060480A
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Abstract
In production of a refined sugar factory, a double-effect evaporation system with a three-effect preheater first heats a material by the three-effect plate-type preheater, so as to achieve an appropriate evaporation temperature; and then the material enters to a plate-type evaporator for evaporation and concentration. According to the double-effect evaporation in the invention, syrup after evaporation is separated by a gas-liquid separator for gas-liquid separation of syrup and juice steam. Separated juice is sent into a next effect evaporation (boiling by a sugar boiling section), and the juice steam is pumped as a heat source for a next effect evaporator or preheater. The evaporation system employs the plate-type evaporator, and has high heat utilization efficiency, so the system can use a heat source with low temperature, and has notable effect on improving the thermal utilization of the sugar factory. At the same time, the plate-type evaporator has the characteristics of high thermal efficiency, low fouling rate, long operation cycle and flexible and convenient operation; and the whole system has small area occupation, no high requirements on workshop space limitation, and wide range of application, and is a novel type of evaporation system worth popularizing.
Description
Technical field
The present invention relates to the improvement of Closed Circulation in Sugar Production equipment, particularly for the improvement and application of the sugar juice evaporation equipment in refining sugar refinery.
Background technology
Evaporation is the center of sugar refinery therrmodynamic system, is the consumer of high-temperature steam, also be the supply station of Low Temperature Steam, or boiler enters the main source of stove water and other process waters.Along with the fast development of industrial technology, the vapo(u)rization system in sugar refinery and equipment is improvement and bring new ideas constantly also, and kind is very various.Sugar refinery mainly is that shell and tube evaporating pot take non-membrane type is as main with evaporating pot for a long time.Outer circulation type evaporating pot and the multiple-downcomer evaporating pot of the standard type evaporating pot (also claiming Robert formula evaporating pot) that use in China sugar refinery and on its basis development all belong to non-film-type evaporation tank.And in the cane sugar factory of present China, the five effect vacuum-evaporation that mostly are based on the standard type evaporating pot that vapo(u)rization system is used.In recent years, the reason of economic aspect forces sugar refinery constantly to reduce steam consumption, and therefore, at present importance take multi-effect evaporation system as the basis, more efficiently evaporation equipment and vapo(u)rization system becomes increasingly conspicuous.From the viewpoint of the economy of energy, with regard to more effective vapo(u)rization system, its basis be have high K value, can be with the evaporating pot of Low Temperature Difference operation.And various plate-type evaporating tanks are exactly a kind of substitute products of traditional Robert's formula and common falling film type evaporation tank.Since 1987, sugar industry with regard to the sixth of the twelve Earthly Branches through having obtained the experience of using plate-type evaporating tank.The plate-type evaporating tank technology can be subdivided into and rise two kinds of membrane type and falling film types.Compare with the continuous flow evaporating pot with ordinary cycle, this new technology can guarantee sugarcane juice residence time of lacking, and low chromogenesis reduces maintenance work and has better heat transfer property, is a kind of equipment that can improve the economy of energy.
Summary of the invention
The purpose of this invention is to provide a kind of can energy-efficient evaporation equipment, solve the problem that steam consumption is high, the time is long, effect is bad of five effect vacuum-evaporation of the standard type evaporating pot that uses in present sugar refinery, and shorten the sugar juice evaporation time in refining sugar refinery.
Technical scheme of the present invention is achieved in that
The shell and tube evaporating pot (Robert formula evaporating pot) of the non-membrane type in existing sugar refinery or outer circulation type evaporating pot and multiple-downcomer evaporating pot are replaced with plate-type evaporator, and the five effect vacuum-evaporation that will have sugar refinery now become the two-effect evaporation system of triple effect preheater.
Refining sugar refinery of the present invention vapo(u)rization system, comprise vaporizer and steam separator, it is characterized in that: use plate-type evaporator to replace outer circulation type shell and tube evaporating pot and multiple-downcomer evaporating pot, five effect vacuum-evaporation are become the two-effect evaporation system of triple effect preheater, it comprises preheater, plate-type evaporator and steam separator, connect an effect preheater (PH1) after syrup is exported by pump, add hot vapour source and use the juice vapour of two effect plate-type evaporators after steam separator separates; One effect preheater syrup outlet pipe connects two effect preheaters, adds hot vapour source and uses the juice vapour of an effect plate-type evaporator after carbonated drink is separated; Two effect preheater syrup outlet pipes connect the triple effect preheater, and the triple effect preheater adds the mixing steam after hot vapour source uses decrease temperature and pressure; One effect plate-type evaporator connects the mixing steam pipe as adding hot vapour source, one effect plate-type evaporator outlet connects steam separator after separating, syrup is gone to two effect plate-type evaporators, juice vapour after the separation connects two effect plate-type evaporators and two effect preheaters use as adding hot vapour source, and two effect steam separator outlet pipes connect effect preheater and a condenser.
The two-effect evaporation system of described triple effect preheater, what preheater adopted is plate-type heat exchanger, plate-type heat exchanger is by one group of corrugated cardboard sheet, rubber gasket and a secondary metal frame form, consist of runner between the plate and by the gasket sealing, cold fluid and hot fluid under the guiding of gasket, alternately flow through respectively separately runner and by the plate transferring heat.
Described steam separator is a pressurized vessel, inside has relevant air inlet component and drop to capture member, gas is exported by top, liquid phase is collected by the bottom, saturated gas is in cooling or pressure process, part condensable gas component forms small droplets and flows with gas, realizes that lime set reclaims or gas phase purifying.
Described plate-type evaporator can be regarded as by a plate type heating chamber and the evaporating pot that juice vapour separating tank is combined into.Heating chamber is combined by the metal sheet of some amount.Replace passage and syrup passage as heating steam between two plates.Syrup can be the movement that rises film, falling liquid film or elevating membrane in passage.Pass through between the material slave plate, and be heated by steam and evaporate.Liquid-vapor mixture is discharged from the exit, then enters steam separator, in separator with vapor-liquid separation, thereby obtain concentrated material and secondary steam.In multistage evaporation, concentrated material and secondary steam will enter the next stage vaporizer, continue evaporation.
Adopt after the above-mentioned plate-type evaporator, the sugar juice evaporation technical process in sugar refinery is:
With the two-effect evaporation system of triple effect preheater, first with material through the heating of triple effect plate type preheater, make it the vaporization temperature that reaches suitable, then enter plate-type evaporator and carry out evaporation concentration.The present invention is two effect evaporations, all passes through gas-liquid separator at the syrup behind pervaporation syrup and juice vapour are carried out gas-liquid separation.Syrup after the separation enters lower effect evaporation (boiling the boiling-off of sugared workshop section), and juice vapour is taken out as lower 1st effective evaporator or preheater thermal source.
The beneficial effect of the refining sugar refinery of the present invention vapo(u)rization system:
The plate-type evaporator that vapo(u)rization system of the present invention adopts is a kind of novel high-efficiency and energy-saving evaporation equipment that developed recently gets up, and traditional tubular evaparator relatively has following characteristic and advantage:
(1) vapo(u)rization system of the present invention is used plate-type evaporator, and is high to utilization efficiency of heat energy, so can use the thermal source of lesser temps, for improving sugar refinery heating power utilization unusual effect arranged.Simultaneously, the characteristics such as plate-type evaporator has the thermo-efficiency height, and scaling rate is low, and the cycle of operation is long, and flexible operation is easy, and the whole system floor space is little, and less demanding for the factory building limited space, applied widely, be a kind of novel vapo(u)rization system that is worthy to be popularized.
(2) heat transfer efficiency is high, and the K value is generally 3500～5800kW/ (m
2K), higher 2～4 times than shell and tube evaporator, thereby under equal conditions required heat transfer area is little;
(3) compact construction, volume is little, and be specially adapted to modernize and expand the existing factory, technological transformation etc. takes full advantage of existing equipment, overcomes the occasion of limited space;
(4) quality is light, and heat transfer plate is thin, and it is few to consume amount of metal, and every square metre of heating-surface area consumes metal 10kg approximately, only is 1/3～1/4 of tube still heater;
(5) add thermal material residence time weak point in well heater, inner dead space is few, and sanitary condition is good, is applicable to the heating of heat-sensitive material;
(6) flexible operation, the equipment surplus is large, and the quantity that can increase as required or reduce plate to be changing its heating-surface area, or changes working conditions, and the amplitude of specification of equipment is very large, the size of every heat exchanger fin, little Dao 0.5m
2, large reached at 1.3m
2, the heat interchanging area of every equipment can be at 1～1000m
2Between;
(7) can use the thermal source of lesser temps, reclaim the heat in the low-temperature heat source, the heat transfer temperature difference between the cold and hot material can reduce to 4～5 ℃.
Because the rise of energy prices and the requirement of environmental protection, industrial demand growth to energy-efficient equipment is rapid, and the research of plate-type evaporator and application development in recent years are very fast.No matter be the home and abroad, as a kind of novel energy-conserving evaporation equipment, plate-type evaporator has been widely used in the industries such as metallurgy, food, papermaking, air-conditioning, chemical industry and sea water desaltination.
Description of drawings:
Fig. 1 is process flow diagram of the present invention.Wherein: 1 is an effect plate-type evaporator, and 2 is effect steam separators, and 3 is two effect plate-type evaporators, and 4 is two effect steam separators, and PH1 is an effect preheater, and PH2 is two effect preheaters, and PH3 is the triple effect preheater.
Fig. 2-the 4th, plate-type evaporator equipment drawing in the plate evaporation of the present invention system.Wherein: the 8th, the plate-type evaporator front end-plate.The 9th, the plate-type evaporator corrugated cardboard sheet.The 10th, the plate-type evaporator back head.The 11st, the steam inlet of vaporizer.The 12nd, the liquid glucose juice vapour mixture outlet after the evaporation.The 13rd, the evaporator condensation water out.The 14th, the import of vaporizer syrup.The 15th, the movable pressing board of plate-type evaporator framework, effect is fixing and compresses the vaporizer plate.The 16th, the column of plate-type evaporator framework.The 17th, the clamping screw of vaporizer.The 18th, the nut of the clamping screw of vaporizer.
Embodiment:
The present invention is take the two-effect evaporation system with triple effect preheater of plate-type evaporator as the basis, because plate-type evaporator has higher heat transfer K value, so volume is little, compact construction, floor space is little, has both reached energy-saving and cost-reducing effect, can also preferably resolve the problem of factory building limited space.
Now 1 embodiments of the invention are described by reference to the accompanying drawings:
As shown in Figure 1, entering vapo(u)rization system syrup temperature is 84 ℃, and the hammer degree is 62 ° of Bx, is heated to 95 ℃ through an effect preheater PH1 first, adds hot vapour source and uses the juice vapour of two effect plate-type evaporators 3 after steam separator separates.The syrup of one effect preheater after out uses the juice vapour of an effect plate-type evaporator 1 after an effect steam separator 2 separates as adding hot vapour source again through two effect preheater PH2 heating.Imitating steam separators 4 syrup temperature out from two effect plate-type evaporators 3 through two is 108 ℃, then enters triple effect preheater PH3 and heats, and in triple effect preheater PH3, the mixing steam after the use decrease temperature and pressure is as heat source.After the triple effect preheating, the syrup temperature reaches 112 ℃, can enter plate-type evaporator and evaporate.It is that 120 ℃ mixing steam evaporates that one effect plate-type evaporator 1 uses temperature after the decrease temperature and pressure, and the syrup after the evaporation enters in the steam separator separates.Syrup enters lower effect plate-type evaporator continuation evaporation after separating, and juice vapour can reach 110 ℃, enters lower effect plate-type evaporator and two effect preheater PH2 as heat source.After two effect evaporations, syrup hammer degree is 73 ° of Bx, and 106.19 ℃ of temperature can enter and boil sugared workshop section and carry out boiling-off, and is 100 ℃ from two effect steam separators juice stripping temperature out, and part is taken out as one and imitated the preheater thermal source, and remainder enters condenser.The vapo(u)rization system thermodynamic equilibrium is calculated as follows table:
Be not difficult to find out by upper table, because plate-type evaporator has higher hot transmission value, so that carry out that temperature head becomes very little between the medium of heat exchange, can use the thermal source of lesser temps, thereby increase economic benefit.
Shown in accompanying drawing 2-4: 8-plate-type evaporator front end-plate.9-plate-type evaporator corrugated cardboard sheet.10-plate-type evaporator back head.11-vaporizer steam inlet.Liquid glucose juice vapour mixture outlet after the 12-evaporation.13-evaporator condensation water out.The import of 14-vaporizer syrup.The movable pressing board of 15-plate-type evaporator framework, effect are fixing and compress the vaporizer plate.The column of 16-plate-type evaporator framework.The clamping screw of 17-vaporizer.The nut of the clamping screw of 18-vaporizer.Syrup enters plate-type evaporator from vaporizer syrup import 14, heating steam enters vaporizer from plate-type evaporator heating steam import 11, form the slit passage between the corrugated cardboard sheet 9 in the vaporizer, alternately be vapour passage and syrup passage between two plates, heating steam is carried out heat exchange with syrup in passage, syrup is heated to boiling point and transpiring moisture.Liquid glucose juice vapour mixture after evaporating enters and carries out vapor-liquid separation in the steam separator from exporting 12 out, thereby the concentrated syrup of acquisition and second steam are so-called juice vapour.Water of condensation then flows out from evaporator condensation water out 13.The plate heater volume that uses is little, compact construction, floor space is more much smaller than standard type evaporating pot, and has higher handiness, can change heating-surface area and volume by the quantity that increases or reduce heating plates, newly-built, enlarging or the technological transformation in sugar refinery all had very large advantage.
Claims (3)
1. refining sugar refinery vapo(u)rization system, comprise vaporizer and steam separator, it is characterized in that: use plate-type evaporator to replace outer circulation type shell and tube evaporating pot and multiple-downcomer evaporating pot, five effect vacuum-evaporation are become the two-effect evaporation system of triple effect preheater, it comprises preheater (PH1, PH2, PH3), plate-type evaporator (1,3) and steam separator (2,4), connect an effect preheater (PH1) after syrup is exported by pump, add hot vapour source and use the juice vapour of two effect plate-type evaporators (3) after steam separator (4) separates; One effect preheater (PH1) syrup outlet pipe connects two effect preheaters (PH2), adds hot vapour source and uses the juice vapour of an effect plate-type evaporator (1) after carbonated drink is separated; Two effect preheater (PH2) syrup outlet pipes connect triple effect preheater (PH3), and triple effect preheater (PH3) adds the mixing steam after hot vapour source uses decrease temperature and pressure; One effect plate-type evaporator (1) connects the mixing steam pipe as adding hot vapour source, one effect plate-type evaporator (1) outlet connects steam separator (2) after separating, syrup is gone to two effect plate-type evaporators (3), juice vapour after the separation connects two effect plate-type evaporators (3) and two effect preheaters (PH2) use as adding hot vapour source, and two effect steam separator (4) outlet pipes connect effect preheater and a condenser.
2. refining sugar refinery as claimed in claim 1 vapo(u)rization system, it is characterized in that: the two-effect evaporation vapo(u)rization system of triple effect preheater, what preheater adopted is plate-type heat exchanger, plate-type heat exchanger is by one group of corrugated cardboard sheet, rubber gasket and a secondary metal frame form, consist of runner between the plate and by the gasket sealing, cold fluid and hot fluid under the guiding of gasket, alternately flow through respectively separately runner and by the plate transferring heat.
3. refining sugar refinery according to claim 1 vapo(u)rization system, it is characterized in that: steam separator is a pressurized vessel, inside has relevant air inlet component and drop to capture member, gas is exported by top, liquid phase is collected by the bottom, saturated gas is in cooling or pressure process, and a part of condensable gas component forms small droplets and flows with gas, realizes that lime set reclaims or gas phase purifying.
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| CN201110315511.9A CN103060480B (en) | 2011-10-18 | 2011-10-18 | Evaporation system in refined sugar factory |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409564A (en) * | 2013-08-16 | 2013-11-27 | 开远华丰机电机械工贸有限公司 | Thermal system and technology for evaporation, heating and sugar boiling in sugar preparation |
| CN103896351A (en) * | 2014-04-02 | 2014-07-02 | 陕西胜利高原环保科技有限公司 | Compound evaporation device for continuously removing pollutants from water |
| CN106512458A (en) * | 2016-12-09 | 2017-03-22 | 南宁市黑晶信息技术有限公司 | Distillation system for sugar industry factory |
| CN107013898A (en) * | 2017-04-25 | 2017-08-04 | 荣海生物科技有限公司 | Water circulation system in a kind of Soybean Peptide candy production |
| CN115245687A (en) * | 2022-06-30 | 2022-10-28 | 内蒙古敕勒川糖业有限责任公司 | Five-effect evaporation system for sugar production and use method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104762417B (en) * | 2015-04-02 | 2018-04-10 | 广西大学 | A kind of sugar juice evaporation method |
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| CN1047885A (en) * | 1989-06-03 | 1990-12-19 | 宁夏回族自治区银川糖厂 | Four-effect pressure evaporation system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409564A (en) * | 2013-08-16 | 2013-11-27 | 开远华丰机电机械工贸有限公司 | Thermal system and technology for evaporation, heating and sugar boiling in sugar preparation |
| CN103409564B (en) * | 2013-08-16 | 2015-05-13 | 开远华丰机电机械工贸有限公司 | Thermal system and technology for evaporation, heating and sugar boiling in sugar preparation |
| CN103896351A (en) * | 2014-04-02 | 2014-07-02 | 陕西胜利高原环保科技有限公司 | Compound evaporation device for continuously removing pollutants from water |
| CN106512458A (en) * | 2016-12-09 | 2017-03-22 | 南宁市黑晶信息技术有限公司 | Distillation system for sugar industry factory |
| CN107013898A (en) * | 2017-04-25 | 2017-08-04 | 荣海生物科技有限公司 | Water circulation system in a kind of Soybean Peptide candy production |
| CN115245687A (en) * | 2022-06-30 | 2022-10-28 | 内蒙古敕勒川糖业有限责任公司 | Five-effect evaporation system for sugar production and use method |
| CN115245687B (en) * | 2022-06-30 | 2024-05-14 | 内蒙古敕勒川糖业有限责任公司 | Five-effect evaporation system for sugar production and use method |
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