CN102743890A - Improved heating power vapor recompression process and special heating power vapor recompression system for same - Google Patents
Improved heating power vapor recompression process and special heating power vapor recompression system for same Download PDFInfo
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- CN102743890A CN102743890A CN2012102736307A CN201210273630A CN102743890A CN 102743890 A CN102743890 A CN 102743890A CN 2012102736307 A CN2012102736307 A CN 2012102736307A CN 201210273630 A CN201210273630 A CN 201210273630A CN 102743890 A CN102743890 A CN 102743890A
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Abstract
The invention belongs to material concentration and particularly relates to an improved heating power vapor recompression process and a special heating power vapor recompression system for the same. The improved heating power vapor recompression process includes steps of material input, external source vapor input, mechanical vapor recompression (MVR) vapor pressurization, post-pressurization vapor input, material output and the like. The special heating power vapor recompression system for the process comprises evaporators arranged at intervals and an MVR compressor. The upper portion of each evaporator is provided with a material inlet, a steam inlet at the top of each evaporator is communicated with external source vapor, and three ways of output are arranged on the lower portion of each evaporator and are respectively connected with inlets of a condenser water pump, a material outlet pump and a gas liquid separator. The gas liquid separator has two ways of output, the gas-phase output of the gas liquid separator is connected with the input end of the MVR compressor, the liquid-phase output of the gas liquid separator is connected with the material outlet pump, and the output end of the MVR compressor is respectively communicated with a compensation vapor inlet of each evaporator through a pipeline. The process and the system resolve the problem in the prior art of high energy consumption and have the advantages of being low in energy consumption, small in discharge, low in modification and operation cost and the like.
Description
Technical field
The invention belongs to concentrating of material, be meant a kind of improved thermodynamic steam recompression technology and special-purpose thermodynamic steam recompression system thereof especially.
Background technology
Evaporimeter is to make solution concentration or from solution, separate out the equipment of crystal grain through heating.Mainly form by heating clamber and vaporization chamber two parts.Heating clamber provides evaporation needed heat to liquid, impels the liquid boiling vaporization; Vaporization chamber separates gas-liquid two-phase fully.The steam that produces in the heating clamber has a large amount of liquid foams, arrived vaporization chamber than large space after, the effect of these liquid thereby self cohesions or demister etc. is able to separate with steam.Usually demister is located at the top of vaporization chamber.The groundwork of evaporimeter comprises thermodynamic steam recompression (TVR), mechanical vapour recompression (MVR).
Wherein thermodynamic steam recompression (TVR) be a separator indirect steam part of coming out under the drive of high-pressure work steam, after getting into injector and mixing increasing temperature and pressure, get into heating clamber and be used as heating steam and use, heat feed liquid.Another part gets into condenser, discharges after the condensation.Heating steam condenses into water and discharges in heating clamber.Solution evaporation and concentration under the heating of heating steam in the pipe is discharged after reaching requirement.
According to incompletely statistics, China has 50,000 multi-effect evaporators in industries such as medicine, sucrose, starch sugar, chemical industry at present, all belongs to the falling film type multi-effect evaporator.Multi-effect evaporator mainly consumes the steam energy consumption; This evaporimeter must adopt the external source air supply system to continue to provide steam; Be generally 5kg pressure, 125 ℃ steam evaporates the moisture in the material through the heat exchange mode of cascade utilization, on average whenever evaporates 1 ton of water and need consume 0.5 ton of steam; Evaporimeter also must be equipped with condenser system, material balance system, vacuum system in addition, on average whenever evaporates 1 ton of water and need consume the 135kg standard coal.Calculate by ton water consumption 135kg standard coal, then 50,000 multi-effect evaporators in the whole nation are pressed 10t/h, need power consumption 4.86 hundred million t standard coals every year.
Traditional multi-effect evaporator is that 5kg pressure, 125 ℃ steam imitate are got into vapo(u)rization system from one; Through the effect discharge from the end after the step heat exchange; Temperature is generally 85-90 ℃, and the steam of discharge promptly gets into condenser system and becomes condensed water and go out of use, and has wasted the heat energy of water greatly.
MVR technology system utilizes the energy of the indirect steam that it self produces, thereby reduces a power-saving technology of demands for energy to external world.As far back as the sixties, Germany and the successful fields such as chemical industry, food, papermaking, medicine, desalinization and sewage disposal that this technology is used for of France.In the Multi-effect Evaporation Processes, the indirect steam of a certain effect of evaporimeter can not be directly as this effect thermal source, can only be as the thermal source of inferior effect or inferior several effects.As must extraly giving its energy, its temperature (pressure) is improved as this effect thermal source.Steam jet pump can only the compression section indirect steam, all indirect steams in the then compressible evaporimeter of MVR evaporimeter.
Yun Shichang has proposed theoretical point view that MVR is directly combined with multi-effect evaporator in delivering document " mechanical vapour recompression (MVR) " (the 21st volume the 2nd phase P78-P81 in " Chinese dairy industry " April in 1993) in 1993; General MVR technology can raise vapor (steam) temperature 8 ℃ through compression; So for temperature difference 12-20 ℃ of reaching multi-effect evaporator; Two MVR are together in series, make recovered steam can promote 16 ℃ through second-compressed.Though should technology propose a new reducing energy consumption scheme; But at that time, only be confined to theoretical research stage, and himself exist certain defective: China's supply of electric power at that time is relatively more nervous, and the electric rate of exchange are high; Adopt this technology to reduce gas consumption; But power consumption increases, and under situation at that time, promotes limitedly, and the price of a cover MVR equipment is at 200-400 ten thousand in the market.Adopt many MVR equipment that TVR equipment is transformed, increased improvement expenses greatly.
Summary of the invention
The object of the present invention is to provide a kind of improved thermodynamic steam recompression technology and special-purpose thermodynamic steam recompression system thereof; Dexterously the MVR technology is transformed existing thermodynamic steam recompression technology; And provide adaptive with it special-purpose thermodynamic steam to recompress system; When cutting down the consumption of energy, scrap build expense and operating cost have significantly been reduced.
One of the object of the invention is achieved in that
Improved thermodynamic steam recompression technology comprises following processing step:
A, material input
Material is respectively through each evaporimeter of the material input port on each evaporimeter top input;
B, the input of external source steam
External source steam is inner through each evaporimeter of steam input port input at each evaporimeter top respectively, material is heated concentrated;
C, the supercharging of MVR steam
Steam after material concentrates in each evaporimeter is through gas-liquid separator separates, and liquid phase wherein connects the output of material rear pump respectively, and gas phase is wherein imported the MVR compressor compresses respectively;
Steam input after D, the supercharging
The steam of exporting after the MVR compressor compresses is inner through additional each evaporimeter of steam inlet input on each evaporimeter top;
E, material output
Repeating step C, D reach material and concentrate requirement, and the material after heating concentrates connects the discharge of material rear pump by the material outlet of each base of evaporator.
Second purpose of the present invention is achieved in that
The special-purpose thermodynamic steam recompression of improved thermodynamic steam recompression technology system comprises the evaporimeter that is provided with at interval, and the MVR compressor; Each evaporimeter top is provided with the material input port; The steam input port at each evaporimeter top is communicated with external source steam, and each evaporimeter bottom has three tunnel outputs, and its first via connects condensate pump; It the second the tunnel connects the material rear pump, and its Third Road connects the input port of gas-liquid separator; The total two-way output of gas-liquid separator, its gas phase output connects the input of MVR compressor, and its liquid phase output connects the material rear pump, and the output of MVR compressor is communicated with the additional steam inlet of each evaporimeter respectively by the road.
Concrete technical scheme of the present invention also has:
For ease of the material of importing each evaporimeter is measured, described steps A is that the material warp gets into each evaporimeter with the flowmeter that the material input port on each evaporimeter top is communicated with respectively.Corresponding with it structural design is that the material input port on each evaporimeter top is communicated with flowmeter respectively.
For the material that gets into evaporimeter is carried out preheating, further to be beneficial to concentrating of material.Optimized technical scheme is, described steps A be material earlier through the preheater preheating, the material warp after the preheating gets into each evaporimeter with the flowmeter that the material input port on each evaporimeter top is communicated with respectively.The structural design of correspondence is with it, also comprises a preheater, and the output of this preheater is communicated with the input of flowmeter, the input termination material input of this preheater.
Water for ease of to each evaporimeter middle and lower part discharges, and optimized technical scheme is, also comprises a step F behind described step B, C, D, the E, and the process conditions of this step are following:
The discharging of water in F, each evaporimeter
The water that each evaporimeter produces at work is through discharging with the condensate pump that its bottom is connected respectively.
The substantive distinguishing features that the present invention had is with the remarkable technological progress that obtains:
1, the MVR compressor adopts the mode of parallel connection to be connected with each evaporimeter in the improved thermodynamic steam recompression system; Be a kind of with one-to-multiple form; This is connected to original multi-effect evaporator after MVR is connected, save great deal of investment.The price of a cover MVR equipment is at 200-400 ten thousand in the market.So, can practice thrift a cover MVR equipment investment through reaching after this technological transformation under the same output condition.And enterprise need not discard existing multi-effect evaporator, on original multi-effect evaporator, transforms to get final product, and newly buys a whole set of apparatus in comparison and practiced thrift a large amount of equipment investments especially.
2, improved thermodynamic steam recompression technology is the indirect steam that the material boiling produces owing to what reuse; So whole system does not need the subsidiary condenser system of original multi-effect evaporator, vacuum system etc., the operating costs such as water resource and power consumption of enterprise have been reduced significantly.
3, the more traditional multi-effect evaporator of improved thermodynamic steam recompression system can save energy more than 61% before transforming after the water transformation of every evaporation equivalent.Traditional multi-effect evaporator needs the steam that provides that the external source air supply system continues; Need lasting external source steam be provided after the transformation to evaporimeter; Just when system opens, provide a certain amount of steam to get final product, get into heat-exchange system once more after the indirect steam of system's material generation capable of using afterwards heats it through the mechanical compress recovery and carry out recycle.
4, improved thermodynamic steam recompression system's employing parallel way is connected with multi-effect evaporator; Can make things convenient for enterprise to require to control the keying of the valve that is connected with each evaporimeter according to the output in dull season and busy season; Can make the balanced distribution of enterprise like this; Control production efficiency, this is that the multi-effect evaporator of the form of originally connecting is beyond one's reach.
5, the entire equipment running temperature is low than the multiple-effect evaporation equipment, will be less to the infringement of the nutritional labeling in the feed liquid.
Description of drawings
Accompanying drawing of the present invention has:
Fig. 1 is the structural representation of thermodynamic steam recompression system among the present invention.
Reference numeral in the accompanying drawing is following:
1, material rear pump; 2, preheater; 3, flowmeter; 4, steam input port; 5, condensate pump; 6, evaporimeter; 7, replenish the steam inlet; 8, gas-liquid separator; 9, MVR compressor.
The specific 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 does not all break away from protection scope of the present invention.
Embodiment 1
Evaporimeter among the present invention is four, and its overall technical architecture is following:
Improved thermodynamic steam recompression technology comprises following processing step:
A, material input
Material is earlier through preheater 2 preheatings, and the material warp after the preheating gets into each evaporimeter 6 with the flowmeter 3 that the material input port on each evaporimeter 6 top is communicated with respectively.
B, the input of external source steam
External source steam through steam input port 4 each evaporimeter 6 inside of input at each evaporimeter 6 top, heats concentrated respectively to material;
C, the supercharging of MVR steam
Steam after material concentrates in each evaporimeter 6 separates through gas-liquid separator 8, and liquid phase wherein connects 1 output of material rear pump respectively, and gas phase is wherein imported 9 compressions of MVR compressor respectively;
Steam input after D, the supercharging
The steam of MVR compressor 9 compression back outputs is through 7 each evaporimeter 6 inside of input, additional steam inlet on each evaporimeter 6 top;
E, material output
Repeating step C, D reach material and concentrate requirement, and the material after heating concentrates connects 1 discharge of material rear pump by the material outlet of each evaporimeter 6 bottom.
Also comprise a step F behind described step B, C, D, the E, the process conditions of this step are following:
The discharging of water in F, each evaporimeter
The water that each evaporimeter 6 produces at work is through discharging with the condensate pump 5 that its bottom is connected respectively.
The special-purpose thermodynamic steam recompression of improved thermodynamic steam recompression technology system comprises the evaporimeter 6 that is provided with at interval, and MVR compressor 9; Each evaporimeter 6 top is provided with the material input port, also comprises a preheater 2, and the output of this preheater 2 is communicated with the input of flowmeter 3, the input termination material input of this preheater 2; The steam input port 4 at each evaporimeter 6 top is communicated with the external source steam, and each evaporimeter 6 bottom has three tunnel outputs, and its first via connects condensate pump 5, and it the second the tunnel connects material rear pump 1, and its Third Road connects the input port of gas-liquid separator 8; Gas-liquid separator 8 total two-way outputs, its gas phase output connects the input of MVR compressor 9, and its liquid phase output connects material rear pump 1, and the output of MVR compressor 9 is communicated with the additional steam inlet 7 of each evaporimeter 6 respectively by the road.
Evaporimeter in the present embodiment is common 3-5, and its processing step and version are with embodiment 1.It is as shown in the table that the energy consumption of improved thermodynamic steam recompression system and traditional multi-effect evaporator contrasts situation.
Multi-effect evaporator that table 1 is traditional and the contrast of improved thermodynamic steam recompression system energy consumption
Annotate: steam signature coal measures number is 0.125; Electricity signature coal measures number is 0.35
Can know that from last table the traditional multi-effect evaporator of 1 ton of water of every evaporation need consume energy: 0.33 * 0.125 * 1000=41.25kgce, 0.5 * 0.125 * 1000=62.5kgce, i.e. power consumption is 41.25-62.5kgce.
1 ton of improved thermodynamic steam recompression of water of every evaporation system need consume energy: 30 * 0.35=10.5kgce
So the improved thermodynamic steam recompression of 1 ton of water of every evaporation system can save energy than multi-effect evaporator: (41.25-10.5) ÷ 41.25 * 100%=74.55%, (62.5-10.5) ÷ 62.5 * 100%=83.2% is so energy-saving efficiency is 74.55%-83.2%.
Claims (7)
1. improved thermodynamic steam recompression technology is characterized in that comprising following processing step:
A, material input
Material is respectively through the material input port on each evaporimeter (6) top input each evaporimeter (6);
B, the input of external source steam
External source steam is imported each evaporimeter (6) inside through the steam input port (4) at each evaporimeter (6) top respectively, material is heated concentrated;
C, the supercharging of MVR steam
Steam after material concentrates in each evaporimeter (6) separates through gas-liquid separator (8), and liquid phase wherein connects material rear pump (1) output respectively, and gas phase is wherein imported MVR compressor (9) compression respectively;
Steam input after D, the supercharging
The steam of MVR compressor (9) compression back output is imported each evaporimeter (6) inside through the additional steam inlet (7) on each evaporimeter (6) top;
E, material output
Repeating step C, D reach material and concentrate requirement, and the material after heating concentrates connects material rear pump (1) discharge by the material outlet of each evaporimeter (6) bottom.
2. improved thermodynamic steam recompression technology according to claim 1 is characterized in that described steps A is that the material warp gets into each evaporimeter (6) with the flowmeter (3) that the material input port on each evaporimeter (6) top is communicated with respectively.
3. improved thermodynamic steam recompression technology according to claim 2; It is characterized in that described steps A is material process preheater (2) preheating earlier, the material warp after the preheating gets into each evaporimeter (6) with the flowmeter (3) that the material input port on each evaporimeter (6) top is communicated with respectively.
4. improved thermodynamic steam recompression technology according to claim 1 is characterized in that also comprising a step F behind described step B, C, D, the E, and the process conditions of this step are following:
The discharging of water in F, each evaporimeter
The water that each evaporimeter (6) produces at work is through discharging with the condensate pump (5) that its bottom is connected respectively.
5. the special-purpose thermodynamic steam recompression of improved thermodynamic steam recompression technology system comprises the evaporimeter (6) that is provided with at interval, and MVR compressor (9); It is characterized in that each evaporimeter (6) top is provided with the material input port; The steam input port (4) at each evaporimeter (6) top is communicated with external source steam; Each evaporimeter (6) bottom has three tunnel outputs; Its first via connects condensate pump (5), and it the second the tunnel connects material rear pump (1), and its Third Road connects the input port of gas-liquid separator (8); The total two-way output of gas-liquid separator (8); Its gas phase output connects the input of MVR compressor (9); Its liquid phase output connects material rear pump (1), and the output of MVR compressor (9) is communicated with the additional steam inlet (7) of each evaporimeter (6) respectively by the road.
6. the special-purpose thermodynamic steam recompression of improved thermodynamic steam recompression technology according to claim 5 system is characterized in that the material input port on each evaporimeter (6) top is communicated with flowmeter (3) respectively.
7. the special-purpose thermodynamic steam recompression of improved thermodynamic steam recompression technology according to claim 6 system; It is characterized in that also comprising a preheater (2); The output of this preheater (2) is communicated with the input of flowmeter (3), the input termination material input of this preheater (2).
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272395A (en) * | 2013-06-17 | 2013-09-04 | 四川东联新能源科技有限公司 | MVR (mechanical vapor recompression) vaporization system |
| CN104645646A (en) * | 2015-02-15 | 2015-05-27 | 重庆奥钝费博医药机械设备有限公司 | Total heat and latent heat recovery type multi-effect vacuum evaporation and concentration device |
| CN105999750A (en) * | 2016-06-23 | 2016-10-12 | 广州中科鑫洲科技有限公司 | Evaporating system capable of conducting online descaling and working continuously and evaporating process |
| CN107050902A (en) * | 2017-02-23 | 2017-08-18 | 上海轻叶能源股份有限公司 | The energy-saving steam system and remodeling method of multiple-effect falling film evaporator |
| CN107162297A (en) * | 2016-03-08 | 2017-09-15 | 广州市心德实业有限公司 | One kind one imitates four body MVR mixed salts waste water separators and separation method |
| CN109022625A (en) * | 2018-09-18 | 2018-12-18 | 上海立足生物科技有限公司 | A method of producing the D-Psicose of concentration |
| CN109457058A (en) * | 2018-11-23 | 2019-03-12 | 中粮融氏生物科技有限公司 | Novel energy-conserving starch sugar four-effect evaporator |
| CN111359240A (en) * | 2020-03-30 | 2020-07-03 | 山东凯斯达机械制造有限公司 | Tubular falling film evaporator, concentration device and using method and process of concentration device |
| CN111375218A (en) * | 2020-03-30 | 2020-07-07 | 山东凯斯达机械制造有限公司 | Molasses concentrating device and using method and process thereof |
| CN114751476A (en) * | 2022-04-21 | 2022-07-15 | 启东神农机械有限公司 | Concentration process of wheat starch slurry and evaporation concentration system thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103272395A (en) * | 2013-06-17 | 2013-09-04 | 四川东联新能源科技有限公司 | MVR (mechanical vapor recompression) vaporization system |
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| CN109022625A (en) * | 2018-09-18 | 2018-12-18 | 上海立足生物科技有限公司 | A method of producing the D-Psicose of concentration |
| CN109457058A (en) * | 2018-11-23 | 2019-03-12 | 中粮融氏生物科技有限公司 | Novel energy-conserving starch sugar four-effect evaporator |
| CN111359240A (en) * | 2020-03-30 | 2020-07-03 | 山东凯斯达机械制造有限公司 | Tubular falling film evaporator, concentration device and using method and process of concentration device |
| CN111375218A (en) * | 2020-03-30 | 2020-07-07 | 山东凯斯达机械制造有限公司 | Molasses concentrating device and using method and process thereof |
| CN114751476A (en) * | 2022-04-21 | 2022-07-15 | 启东神农机械有限公司 | Concentration process of wheat starch slurry and evaporation concentration system thereof |
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Application publication date: 20121024 |