CN103301641A - Reduced pressure and evaporation concentrator capable of circularly utilizing heat energy - Google Patents
Reduced pressure and evaporation concentrator capable of circularly utilizing heat energy Download PDFInfo
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- CN103301641A CN103301641A CN2013102837800A CN201310283780A CN103301641A CN 103301641 A CN103301641 A CN 103301641A CN 2013102837800 A CN2013102837800 A CN 2013102837800A CN 201310283780 A CN201310283780 A CN 201310283780A CN 103301641 A CN103301641 A CN 103301641A
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Abstract
The invention discloses a reduced pressure and evaporation concentrator capable of circularly utilizing heat energy and belongs to the field of chemical equipment of energy-conservation and emission-reduction technologies. Particularly, two hydraulic jet pumps which are connected in series are used for recycling and reutilizing water steam heat energy formed by evaporation; fresh steam is transformed into high-temperature saturated water to be used as a supplementary heat source or solar hot water which is used as the supplementary heat source; an efficient heat exchanger is used as a heating unit to transiently heat in a flowing process; and the temperature of an evaporation and concentration process is subjected to combined control by adopting an adjusting valve and a frequency-variable feed pump. According to the evaporation concentrator disclosed by the invention, residual heat energy can be circularly utilized except heat radiation loss and part of heat brought away by discharged water; and no waste gas is discharged, so that the very good energy-conservation and emission-reduction effects can be realized.
Description
Technical field
The present invention relates to a kind of evaporation concentration equipment, belong to energy-conserving and emission-cutting technology chemical industry equipment field, especially a kind of reduction vaporization inspissator for chemical industry, medicine, the recycling heat energy of food production equipment.
Background technology
At present, the equipment that mainly adopts in the evaporation concentration technique field have the normal formula evaporator, outside fall liquid evaporator, external heating type evaporator, rise the film-type evaporation jar, falling film type evaporation jar etc.Wherein the outer circulation type vacuum concentrating apparatus is mainly used in the recovery of industrial organic solvents (as alcohol) such as Chinese medicine, Western medicine, glucose, wine brewing, starch, oral liquid, food, chemical industry, is applicable to that in batches the cryogenic vacuum of little heat sensitive material wide in variety concentrates.
Reduction vaporization concentrator always divides single-action and multiple-effect two big classes, and it is multiple that the latter is subdivided into two, three, four, five effects again.Single-action is simple in structure, low cost of manufacture, but energy consumption is big; Multiple-effect has certain energy-saving effect, but complex structure, and along with the increase of imitating number, manufacturing cost and floor space increase substantially, and cause power consumption to increase because flow resistance strengthens.No matter be single-action or multiple-effect, finally still have a large amount of waste steam exhaustings, both wasted energy, again atmosphere pollution.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of reduction vaporization inspissator of recycling heat energy, and this apparatus structure is simple, floor space is little, can be with the vapor evaporated heat energy recycling, not to any waste gas of airborne release.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of reduction vaporization inspissator of recycling heat energy, comprise evaporator and heat exchanger that feed liquid to be concentrated is housed, it is characterized in that also comprising feed liquid closed circuit and water-flow circuit, described feed liquid closed circuit and water-flow circuit are arranged in parallel; Described evaporator bottom is communicated with the import of heat exchanger by pipeline, the outlet of heat exchanger is communicated with the top of evaporator by pipeline, form the feed liquid closed circuit, pipeline between evaporator and heat exchanger is provided with the evaporator bottom valve, the export pipeline of heat exchanger is provided with feed pump, is provided with the sampling arm between heat exchanger and the feed pump.
Said structure is described further, described water-flow circuit comprises hydraulic jet pump and the water tank of two cover series connection, the bottom pipeline of described water tank is through water pump, two cover hydraulic jet pump and heat exchangers, be back to the top of water tank, form water-flow circuit, described evaporator top is communicated with hydraulic jet pump one by pipeline, and hydraulic jet pump two is communicated with the high temperature heat source in the external world.The effect of the hydraulic jet pump one among the present invention is that the Steam Recovery that will be evaporated is used to water-flow circuit, and the effect of hydraulic jet pump two right extraneous supplemental heat source belongs in the water-flow circuit, and recirculated water is further heated.
Said structure is described further, described water-flow circuit comprises hydraulic jet pump, water tank and the solar energy hot-water tank of two cover series connection, the bottom pipeline of described water tank is through water pump, two cover hydraulic jet pump, heat exchanger and solar energy hot-water tanks, be back to the top of water tank, the solar energy hot-water tank outlet pipe of solar water pot bottom is communicated with hydraulic jet pump two.
Said structure is described further, the described automatic temperature control system that also comprises, described automatic temperature control system comprises and is provided with evaporator temperature inside sensor, the temperature signal of the temperature sensor in the control valve of hydraulic jet pump two import departments, described evaporator is passed to frequency converter and FEEDBACK CONTROL control valve and feed pump.Automatic temperature control system among the present invention is the rotating speed that preferentially passes through frequency converter FEEDBACK CONTROL feed pump according to the measurement of feed temperature in the evaporator, and the open degree of auxiliary FEEDBACK CONTROL control valve, and feed pump wherein is variable frequency pump.
Said structure is described further, and the pipeline between described water tank and the water pump is provided with the draining branch road, and described draining branch road is provided with draining valve.
Said structure is described further, on the described feed liquid closed circuit terminal pipeline atomizer is installed, described atomizer places the top of evaporator inside, feed liquid to be concentrated.Atomizer is installed in evaporator can increase evaporation surface, improves evaporation efficiency.
Said structure is described further, and the inside of described evaporator is equipped with steam-water separator, and described steam-water separator places the top of feed liquid to be concentrated, and is connected with feed liquid closed circuit terminal pipeline.Use steam-water separator can reduce the water vapour that is evaporated and carry feed liquid secretly, improve concentrated recovery rate.
Said structure is described further, and described heat exchanger is spiral heat exchanger.Heat exchanger can be any efficient partition heat transfer heat exchangers such as spiral plate type, board-like, helix tube type, shell and tube, bushing type, preferentially selects spiral heat exchanger among the present invention for use, can moment with the feed liquid heating of flow regime, flow and the material stock dead angle invariably in its inside.
Said structure is described further, and described water tank top is provided with overflow pipe.Water tank top is provided with overflow pipe, ever-increasing condensed water in the water tank can be discharged by the overflow pipe automatic overflow behind canful.
The running of two closed circuits among the present invention, in water tank, add a certain amount of soft water earlier, start water pump then, softened water pump in the water tank is gone in the waterpower jet pump one, the formed negative pressure of high velocity jet is introduced vapor evaporated in the evaporator, and the compression back becomes saturated hot-water that water temperature is risen.The negative pressure that hydraulic jet pump two forms further rises water temperature outside high-temperature vapour or solar water introducing, by high-performance heat exchanger feed liquid is heated, and hot water self then is cooled and gets back to water tank.Open feed pump, feed liquid is accelerated evaporation after entering evaporator under the effect of negative pressure, at the bottom of the feed liquid that is not evaporated then is cooled and flow to jar, through with pump into atomizer or steam-water separator by feed pump again after the high-performance heat exchanger that is connected at the bottom of the jar reheats.So by two cycle heat exchanges and the negative pressure injection of feed liquid and hot water, make feed liquid reach the purpose that constantly concentrates.After confirming that by sample analysis feed liquid reaches required concentration, get final product shut-down operation, collect concentrate.Because the water level in the continuous increase of steam condensate, water tank will constantly rise, and on the water tank top overflow pipe will be housed, and the condensate water that overfills is discharged automatically for this reason.
Automatic temperature control system in this device can be realized the control of steam or hot water control valve temperature and the control of variable frequency pump temperature, and these two control forms can be distinguished independent operating, and the feed temperature in the evaporator is carried out single control; Also can cooperation, the feed temperature in the evaporator is jointly controlled.When jointly controlling, be preferential with the VFC.
Above running is evaporation operation intermittently in batches, installs feed-inputing branched pipe at the feed liquid closed circuit, and carries out flow-control in a suitable manner, then running can be converted into continued operation.
The beneficial effect that adopts technique scheme to produce is: the present invention is that a kind of two hydraulic jet pumps of series connection that utilize are with the water vapour energy recovery recycling that is evaporated, and initial steam is converted into high temperature saturation water thermal source or with solar water thermal source as a supplement as a supplement, and with high-performance heat exchanger as heating unit, carry out instantaneous heating in flow process, the temperature of its evaporating concentration process adopts control valve and variable frequency pump to jointly control.This evaporation concentrator is taken away the part heat except radiation loss and draining, and its waste heat energy all is recycled, and does not have toxic emission, therefore can reach well energy-conservation, emission reduction effect.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is embodiments of the invention one;
Fig. 2 is embodiments of the invention two;
Fig. 3 is embodiments of the invention three;
Wherein: 1-hydraulic jet pump, one, 2-atomizer, 3-evaporator, 4-hydraulic jet pump two, 5-control valve, 6-temperature sensor, 7-overflow pipe, 8-water tank, 9-draining valve, 10-water pump, 11-frequency converter, 12-evaporator bottom valve, 13-heat exchanger, 14-sample valve, 15-feed pump, 16-solar energy hot-water tank, 17-solar energy heat absorption pipe, 18-solar energy hot-water tank feed pipe, 19-solar energy hot-water tank overflow pipe, 20-solar energy hot-water tank outlet pipe, 21-steam-water separator.
The specific embodiment
The present invention is specifically related to a kind of reduction vaporization inspissator of recycling heat energy, and mainly the automatic temperature control system that has steam or hot water control valve and a variable frequency pump by an evaporator 3, water tank 8, high-performance heat exchanger 13, two hydraulic jet pumps, two check (non-return) valves, two water pumps and a cover is formed.
1 as can be known with reference to the accompanying drawings, in evaporator 3, be equipped with as the atomizer 2 of feed liquid jet to be concentrated or the temperature sensor 6 of steam-water separator 21 and measurement feed temperature, atomizer 2 or steam-water separator 21 are connected with evaporator 13 bottom material liquid outlets by a passage of pipeline, feed pump 15 and heat exchanger 13, form a feed liquid closed circuit.Two hydraulic jet pumps are connected in series, the outlet of hydraulic jet pump 24 links to each other with water tank 8 by another passage of pipeline and heat exchanger 13, import with hydraulic jet pump 1 is connected with water pump 10 by pipeline again in the outlet of water tank 8 bottoms, forms a water-flow circuit.
Below, by reference to the accompanying drawings to implementation example explanation of the present invention, but not as restriction of the present invention.
Embodiment one:With the steam reduction vaporization inspissator of the recycling heat energy of thermal source as a supplement
With reference to accompanying drawing 1, in evaporator 3, add certain Chinese medicine extract of tank volume 3/4, effective active matter content 1.82%, add the normal temperature demineralized water of tank volume 1/4 in the water tank 8.Open evaporator bottom valve 12, open feed pump 15, this Chinese medicine extract is circulated between heat exchanger 13 and evaporator 3.Open water pump 10, make in the water tank 8 demineralized water through hydraulic jet pump 1,4 and heat exchanger 13 return water tank 8 and circulate.The negative pressure that hydraulic jet pump 1 causes is accelerated the Chinese medicine extract evaporation in the evaporator 3, and the water vapour that is evaporated is sucked through check (non-return) valve, and the compressed hot water that condenses in hydraulic jet pump 1 is with original demineralized water heating.Hydraulic jet pump 24 sucks initial steam and be compressed into hot water through check (non-return) valve, and demineralized water is further heated up.After entering heat exchanger 13, hot water and Chinese medicine extract carry out heat exchange Chinese medicine extract are heated, and return after self is cooled in the water tank 8.Heated Chinese medicine extract pumps in the evaporator 3, and through atomizer 2 spraying and vapourisation under reduced pressure, concentrate, concentrate drops down onto at the bottom of 3 jars of the evaporators, concentrates through heat exchanger 13 heating, atomizer 2 sprayings, decompression again.So move in circles, until reaching needed concentration.In this example, the concentrate sample that is taken out by sample valve 14 stops circulation after effective active matter content reaches 12% after testing, and concentrate is all emitted through sample valve 16, and finally detecting effective active matter content is 12.56%, and cycles of concentration reaches 6.9.
In above-mentioned whole evaporating concentration process, the temperature of the Chinese medical extract in the evaporator 3, all the time the measuring-signal by temperature sensor 6 is preferentially regulated via the rotating speed of frequency converter 11 feedback regulation feed pumps 15 and the open degree that is aided with control valve 5, and accurately control is at 39～40 ℃.
The continuous increase that the steam that sucked by hydraulic jet pump 1,4 condense moisture storage capacity in the water tank 8 that is caused can be discharged by overflow pipe 7 automatic overflows behind the canful.In this example, the moisture storage capacity in the water tank 8 (comprising the water that overflows automatically) increases number to be compared with the water yield of evaporation, have more 11.2%, that is steam consumption is 11.2% of evaporation capacity.This consumption significantly is lower than the existing conventional evaporation concentrator.
Embodiment two:With the solar water reduction vaporization inspissator of the recycling heat energy of thermal source as a supplement
With reference to accompanying drawing 2, in evaporator 3, add certain Chinese medicine extract of tank volume 3/4, effective active matter content 1.75%, adding in the water tank 8 a certain amount ofly still has normal temperature demineralized water more than needed after solar energy hot-water tank 16 is filled.Open water pump 10, the demineralized water in the water tank 8 through hydraulic ejector 1,4 and heat exchanger 13, solar energy hot-water tank feed pipe 18, is pumped in the solar energy hot-water tank 16 termination of pumping when to solar energy hot-water tank overflow pipe 19 the hot water overflow being arranged.Hot water temperature in the solar energy hot-water tank 16 to be confirmed rises to more than 70 ℃, opens evaporator bottom valve 12, opens feed pump 15, and Chinese medicine extract to be concentrated is circulated between heat exchanger 13 and evaporator 3.Open water pump 30, and start the automatic temperature control system of evaporator 3, make in the water tank 8 remaining demineralized water through hydraulic jet pump 1,4 and heat exchanger 13, solar energy hot-water tank 16, solar energy hot-water tank overflow pipe 19 return water tank 8 and circulate.The negative pressure that hydraulic jet pump 1 causes is accelerated the Chinese medicine extract evaporation in the evaporator 3, and the water vapour that is evaporated is sucked through check (non-return) valve, and the compressed hot water that condenses into heats demineralized water in hydraulic jet pump 1.Hydraulic jet pump 24 sucks solar water through solar energy hot-water tank outlet pipe 20, check (non-return) valve, demineralized water is further heated up.After entering heat exchanger 13, hot water and Chinese medicine extract carry out heat exchange Chinese medicine extract are heated, and self are cooled and deliver to solar energy hot-water tank 16 by solar energy hot-water tank feed pipe 18, return in the water tank 8 through solar energy hot-water tank overflow pipe 19 again.Heated Chinese medicine extract pumps in the evaporator 3, and through atomizer 2 spraying and vapourisation under reduced pressure, concentrate, concentrate drops down onto at the bottom of 3 jars of the evaporators, enters heat exchanger 13 heating, atomizer 2 sprayings, decompression again and concentrates.So move in circles, until reaching needed concentration.In this example, the concentrate sample that is taken out by sample valve 14 stops circulation after effective active matter content reaches 12% after testing, and concentrate is all emitted through sample valve 36, and finally detecting effective active matter content is 12.37%.
In this evaporating concentration process, the traditional Chinese medicine extraction liquid temp in the evaporator 3 is accurately controlled at 39 ~ 40 ℃ by the temperature control system that temperature sensor 6, control valve 5, frequency converter 11 and feed pump 15 are formed all the time.Ever-increasing condensate water is discharged by overflow pipe 19 automatic overflows to canful in the water tank 8.
Embodiment three:The reduction vaporization inspissator that replaces the recycling heat energy of atomizer with steam-water separator
With reference to accompanying drawing 3, implementation process is with embodiment one, the atomizer 3 that different is in the evaporator is replaced by steam-water separator 21, Chinese medical extract carries out carbonated drink separation in evaporation after entering evaporator, carry soup secretly with minimizing and enter possibility in the hydraulic ejector, concentrate recovery rate thereby improve.In this example, recovery rate has improved 3.2% than embodiment one, is 11.9% with respect to the steam consumption of evaporation capacity.
Claims (9)
1. the reduction vaporization inspissator of a recycling heat energy, comprise evaporator (3) and heat exchanger (13) that feed liquid to be concentrated is housed, it is characterized in that also comprising feed liquid closed circuit and water-flow circuit, described feed liquid closed circuit and water-flow circuit are arranged in parallel;
Described evaporator (3) bottom is communicated with by the import of pipeline with heat exchanger (13), the outlet of heat exchanger (13) is communicated with by the top of pipeline with evaporator (3), form the feed liquid closed circuit, pipeline between evaporator (3) and heat exchanger (13) is provided with evaporator bottom valve (12), the export pipeline of heat exchanger (13) is provided with feed pump (15), is provided with the sampling arm between heat exchanger (13) and the feed pump (15).
2. the reduction vaporization inspissator of recycling heat energy according to claim 1, it is characterized in that described water-flow circuit comprises hydraulic jet pump and the water tank (8) of two cover series connection, the bottom pipeline of described water tank (8) is through water pump (10), two cover hydraulic jet pump and heat exchangers (13), be back to the top of water tank (8), form water-flow circuit, described evaporator (3) top is communicated with hydraulic jet pump one (1) by pipeline, and hydraulic jet pump two (2) is communicated with the high temperature heat source in the external world.
3. the reduction vaporization inspissator of recycling heat energy according to claim 1, it is characterized in that described water-flow circuit comprises hydraulic jet pump, water tank (8) and the solar energy hot-water tank (16) of two cover series connection, the bottom pipeline of described water tank (8) is through water pump (10), two cover hydraulic jet pump, heat exchanger (13) and solar energy hot-water tanks (16), be back to the top of water tank (8), the solar energy hot-water tank outlet pipe (20) of solar energy hot-water tank (16) bottom is communicated with hydraulic jet pump two (2).
4. according to the reduction vaporization inspissator of claim 2 or 3 described recycling heat energy, it is characterized in that the described automatic temperature control system that also comprises, described automatic temperature control system comprises and is provided with evaporator (3) temperature inside sensor (6), and the control valve (5) of hydraulic jet pump two (2) import departments, the temperature signal of the temperature sensor (6) in the described evaporator (3) is passed to frequency converter (11) and FEEDBACK CONTROL control valve (5) and feed pump (15).
5. the reduction vaporization inspissator of recycling heat energy according to claim 4 is characterized in that the pipeline between described water tank (8) and the water pump (10) is provided with the draining branch road, and described draining branch road is provided with draining valve (9).
6. the reduction vaporization inspissator of recycling heat energy according to claim 1, it is characterized in that on the described feed liquid closed circuit terminal pipeline atomizer (2) being installed, described atomizer (2) places the top of evaporator (3) inside, feed liquid to be concentrated.
7. the reduction vaporization inspissator of recycling heat energy according to claim 1, the top that it is characterized in that described evaporator (3) is equipped with steam-water separator (21), and described steam-water separator (21) places the top of evaporator (3) inside, feed liquid to be concentrated.
8. according to the reduction vaporization inspissator of claim 2 or 3 described recycling heat energy, it is characterized in that described water tank (8) top is provided with overflow pipe (7).
9. the reduction vaporization inspissator of recycling heat energy according to claim 1 is characterized in that described heat exchanger (13) is spiral heat exchanger.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106365407A (en) * | 2016-10-03 | 2017-02-01 | 辛后安 | MVR (mechanical vapor recompression) drying system |
| CN108619745A (en) * | 2017-03-24 | 2018-10-09 | 天津邦特磁性材料有限公司 | A kind of full-automatic concentration systems of neodymium iron boron waste material filtrate |
| CN109432809A (en) * | 2018-12-28 | 2019-03-08 | 深圳市鼎深科技有限公司 | A kind of efficient cryogenic vapo(u)rization system |
| CN116216732A (en) * | 2023-05-09 | 2023-06-06 | 福建德尔科技股份有限公司 | Lithium tetrafluoroborate preparation system and control method thereof |
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| CN108619745A (en) * | 2017-03-24 | 2018-10-09 | 天津邦特磁性材料有限公司 | A kind of full-automatic concentration systems of neodymium iron boron waste material filtrate |
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| CN116216732A (en) * | 2023-05-09 | 2023-06-06 | 福建德尔科技股份有限公司 | Lithium tetrafluoroborate preparation system and control method thereof |
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