CN103301641B - 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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- CN103301641B CN103301641B CN201310283780.0A CN201310283780A CN103301641B CN 103301641 B CN103301641 B CN 103301641B CN 201310283780 A CN201310283780 A CN 201310283780A CN 103301641 B CN103301641 B CN 103301641B
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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 field of chemical equipment, especially a kind of reduction vaporization inspissator for recycling heat energy in chemical industry, medicine, food production equipment.
Background technology
At present, the equipment mainly adopted in evaporation concentration technique field has normal formula evaporator, falls liquid evaporator, external heating type evaporator outward, rises film-type evaporation tank, falling film type evaporation tank etc.Wherein outer circulation type vacuum concentrating apparatus is mainly used in the recovery of the industrial organic solvents (as alcohol) such as Chinese medicine, Western medicine, glucose, wine brewing, starch, oral liquid, food, chemical industry, and the cryogenic vacuum being applicable to the little heat sensitive material wide in variety of batch concentrates.
Reduction vaporization concentrator always, point single-action and the large class of multiple-effect two, it is multiple that the latter is subdivided into again two, three, four, five effects.Single-action structure is simple, low cost of manufacture, but energy consumption is large; Multiple-effect has certain energy-saving effect, but complex structure, and along with imitating the increase of 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 exhausting, both wasted energy, again atmosphere pollution.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of reduction vaporization inspissator of recycling heat energy, and this apparatus structure is simple, floor space is little, the steam heat energy recycling that can will be evaporated, 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, characterized by further comprising feed liquid closed circuit and water-flow circuit, described feed liquid closed circuit and water-flow circuit are arranged in parallel; By the inlet communication of pipeline and heat exchanger bottom described evaporator, the outlet of heat exchanger is communicated with the top of evaporator by pipeline, form feed liquid closed circuit, pipeline between evaporator and heat exchanger is provided with evaporator bottom valve, the export pipeline of heat exchanger is provided with feed pump, is provided with sampling arm between heat exchanger and 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 conduit 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 extraneous high temperature heat source.The effect of the hydraulic jet pump one in the present invention is used in the Steam Recovery be evaporated to water-flow circuit, and effect right the extraneous supplemental heat source of hydraulic jet pump two belongs in water-flow circuit, heats further recirculated water.
Said structure is described further, described water-flow circuit comprises hydraulic jet pump, water tank and the solar energy hot-water tank that two covers are connected, the bottom conduit 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, describedly also comprise automatic temperature control system, described automatic temperature control system comprises the temperature sensor being provided with evaporator inside, the control valve of hydraulic jet pump two import department, the temperature signal of the temperature sensor in described evaporator is passed to frequency converter and FEEDBACK CONTROL control valve and feed pump.Automatic temperature control system in the present invention is according to the measurement of feed temperature in evaporator preferentially by the rotating speed of frequency converter FEEDBACK CONTROL feed pump, and the open degree of additional feedback control and regulation valve, feed pump is wherein variable frequency pump.
Be described further said structure, the pipeline between described water tank and water pump is provided with draining branch road, and described draining branch road is provided with draining valve.
Be described further said structure, described feed liquid closed circuit terminal pipeline is provided with atomizer, and described atomizer is placed in the top of evaporator inside, feed liquid to be concentrated.Atomizer is installed in evaporator and can increases evaporation surface, improve evaporation efficiency.
Be described further said structure, the inside of described evaporator is provided with steam-water separator, and described steam-water separator is placed in 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 be evaporated and carry feed liquid secretly, improve concentrated recovery rate.
Be described further said structure, described heat exchanger is spiral heat exchanger.Heat exchanger can be any efficient partition-wall heat transfer heat exchanger such as spiral plate type, board-like, helix tube type, shell and tube, bushing type, preferentially selects spiral heat exchanger, can the feed liquid of flow regime be heated instantaneously in the present invention, flows and material stock dead angle invariably in its inside.
Be described further said structure, described water tank top is provided with overflow pipe.Water tank top is provided with overflow pipe, condensed water ever-increasing in water tank can be discharged by overflow pipe automatic overflow after canful.
The running of two closed circuits in the present invention, first in water tank, add a certain amount of soft water, then water pump is started, soft water in water tank is pumped in hydraulic jet pump one, the steam be evaporated in evaporator is introduced by the negative pressure that high velocity jet is formed, and becomes saturated hot-water to make water temperature increase after compression.External high temperature steam or solar water are introduced and are made water temperature increase further by the negative pressure that hydraulic jet pump two is formed, and feed liquid are heated by high-performance heat exchanger, and hot water self is then cooled gets back to water tank.Open feed pump, feed liquid accelerates evaporation after entering evaporator under the effect of negative pressure, and not then being cooled by the feed liquid of evaporating flow at the bottom of tank, pumps into atomizer or steam-water separator again after the high-performance heat exchanger through being connected with at the bottom of tank reheats by feed pump.So by two cycle heat exchanges and the negative-pressure ejecting of feed liquid and hot water, make the object that feed liquid reaches constantly concentrated.After confirming that feed liquid reaches required concentration by sample analysis, get final product shut-down operation, collect concentrate.Due to the continuous increase of steam condensate, the water level in water tank will constantly rise, and on water tank top, overflow pipe will be housed for this reason, make the condensate water automatic-discharging overfilled.
Automatic temperature control system in this device, can realize steam or hot water control valve temperature controls and variable frequency pump temperature controls, and these two control forms can independently run, and carry out single control to the feed temperature in evaporator; Also can cooperation, the feed temperature in evaporator is jointly controlled.When jointly controlling, be preferential with VFC.
Above running be in batches interval evaporation operation, feed liquid closed circuit installs feed-inputing branched pipe, and carries out flow-control in a suitable manner, then running can be converted into continued operation.
The beneficial effect adopting technique scheme to produce is: the present invention is a kind of water vapour energy recovery recycling utilizing two of series connection hydraulic jet pumps to be 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 using high-performance heat exchanger as heating unit, in flow process, carry out instantaneous heating, the temperature of its evaporating concentration process adopts control valve and variable frequency pump to jointly control.This evaporation concentrator is taken away except partial heat except radiation loss and draining, and its waste heat energy is all recycled, and does not have toxic emission, therefore can reach well energy-conservation, emission reduction effect.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
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.
Detailed description of the invention
The present invention is specifically related to a kind of reduction vaporization inspissator of recycling heat energy, forms primarily of 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 set of automatic temperature control system with steam or hot water control valve and variable frequency pump.
1 is known with reference to the accompanying drawings, at evaporator 3 built with as the atomizer 2 of feed liquid jet to be concentrated or steam-water separator 21 and the temperature sensor 6 measuring feed temperature, atomizer 2 or steam-water separator 21 are connected with material liquid outlet bottom evaporator 13 with a passage of heat exchanger 13 by pipeline, feed pump 15, form a feed liquid closed circuit.Two hydraulic jet pumps are connected in series, the outlet of hydraulic jet pump 24 is connected with water tank 8 by another passage of pipeline and heat exchanger 13, outlet bottom water tank 8 is connected with the import of water pump 10 with hydraulic jet pump 1 by pipeline again, forms a water-flow circuit.
Below, by reference to the accompanying drawings implementation example of the present invention is illustrated, but not as restriction of the present invention.
embodiment one:with the reduction vaporization inspissator of the steam 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%, in water tank 8, add the normal temperature demineralized water of tank volume 1/4.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 the demineralized water in water tank 8 return water tank 8 through hydraulic jet pump 1,4 and heat exchanger 13 and circulate.The negative pressure that hydraulic jet pump 1 causes accelerates the Chinese medicine extract evaporation in evaporator 3, and is sucked through check (non-return) valve by the water vapour be evaporated, and is condensed into hot water, heated by original demineralized water in hydraulic jet pump 1 by compression.Initial steam sucks through check (non-return) valve and is compressed into hot water by hydraulic jet pump 24, and demineralized water is heated up further.After entering heat exchanger 13, hot water and Chinese medicine extract carry out heat exchange and are heated by Chinese medicine extract, return in water tank 8 after self is cooled.Pumped in evaporator 3 by the Chinese medicine extract heated, to spray and vapourisation under reduced pressure, concentrated through atomizer 2, concentrate drops down onto at the bottom of evaporator 3 tank, then heat through heat exchanger 13, atomizer 2 is sprayed, reduced pressure concentration.So move in circles, until reach required concentration.In this example, the concentrate sample taken out by sample valve 14 stops circulation after effective active matter content reaches 12% after testing, is all released by concentrate through sample valve 16, and final to detect effective active matter content be 12.56%, and cycles of concentration reaches 6.9.
In above-mentioned whole evaporating concentration process, the temperature of the Chinese medical extract in evaporator 3, all the time preferentially regulated via the rotating speed of frequency converter 11 feedback regulation feed pump 15 and the open degree that is aided with control valve 5 by the measuring-signal of temperature sensor 6, accurately control at 39 ~ 40 DEG C.
By the steam condensation that hydraulic jet pump 1,4 sucks the continuous increase of moisture storage capacity in the water tank 8 that causes, can be discharged by overflow pipe 7 automatic overflow after canful.In this example, the moisture storage capacity (comprising the water automatically overflowed) in water tank 8 increases number compared with the water yield of evaporation, have more 11.2%, that is steam consumption is 11.2% of evaporation capacity.This consumption is significantly lower than existing conventional evaporation concentrator.
embodiment two:with the reduction vaporization inspissator of the solar water 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%, add in water tank 8 a certain amount of solar energy hot-water tank 16 can be made to fill after still have normal temperature demineralized water more than needed.Open water pump 10, by the demineralized water in water tank 8 through hydraulic ejector 1,4 and heat exchanger 13, solar energy hot-water tank feed pipe 18, pump in solar energy hot-water tank 16, termination of pumping when having hot water overflow to solar energy hot-water tank overflow pipe 19.Hot water temperature in solar energy hot-water tank 16 to be confirmed rises to more than 70 DEG C, opens evaporator bottom valve 12, opens feed pump 15, 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 remaining demineralized water in water tank 8 return water tank 8 circulate through hydraulic jet pump 1,4 and heat exchanger 13, solar energy hot-water tank 16, solar energy hot-water tank overflow pipe 19.The negative pressure that hydraulic jet pump 1 causes accelerates the Chinese medicine extract evaporation in evaporator 3, and is sucked through check (non-return) valve by the water vapour be evaporated, and is condensed into hot water, heated by demineralized water in hydraulic jet pump 1 by compression.Solar water sucks through solar energy hot-water tank outlet pipe 20, check (non-return) valve by hydraulic jet pump 24, and demineralized water is heated up further.After entering heat exchanger 13, hot water and Chinese medicine extract carry out heat exchange and are heated by Chinese medicine extract, deliver to solar energy hot-water tank 16, then return in water tank 8 through solar energy hot-water tank overflow pipe 19 after self is cooled through solar energy hot-water tank feed pipe 18.Pumped in evaporator 3 by the Chinese medicine extract heated, to spray and vapourisation under reduced pressure, concentrated through atomizer 2, concentrate drops down onto at the bottom of evaporator 3 tank, then enters that heat exchanger 13 heats, atomizer 2 is sprayed, reduced pressure concentration.So move in circles, until reach required concentration.In this example, the concentrate sample taken out by sample valve 14 stops circulation after effective active matter content reaches 12% after testing, is all released by concentrate through sample valve 36, and final to detect effective active matter content be 12.37%.
In this evaporating concentration process, the temperature control system that the traditional Chinese medicine extraction liquid temp in evaporator 3 is made up of temperature sensor 6, control valve 5, frequency converter 11 and feed pump 15 all the time accurately controls at 39 ~ 40 DEG C.Discharged by overflow pipe 19 automatic overflow after ever-increasing condensate water to canful in water tank 8.
embodiment three:the reduction vaporization inspissator of the recycling heat energy of atomizer is replaced with steam-water separator
With reference to accompanying drawing 3, implementation process is with embodiment one, replaced by steam-water separator 21 unlike the atomizer 3 in evaporator, while evaporation, carbonated drink separation is carried out after Chinese medical extract enters evaporator, carry liquid secretly enter possibility in hydraulic ejector to reduce, thus improve concentrated recovery rate.In this example, recovery rate improves 3.2% than embodiment one, is 11.9% relative to the steam consumption of evaporation capacity.
Claims (10)
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, characterized by further 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 by the inlet communication of pipeline and heat exchanger (13), the outlet of heat exchanger (13) is communicated with by the top of pipeline with evaporator (3), form 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 sampling arm between heat exchanger (13) and feed pump (15); Described water-flow circuit comprises hydraulic jet pump and the water tank (8) of two cover series connection, the bottom conduit 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 extraneous high temperature heat source.
2. the reduction vaporization inspissator of recycling heat energy according to claim 1, also automatic temperature control system is comprised described in it is characterized in that, described automatic temperature control system comprises the temperature sensor (6) being provided with evaporator (3) inside, and the control valve (5) of hydraulic jet pump two (2) import department, the temperature signal of the temperature sensor (6) in described evaporator (3) is passed to frequency converter (11) and FEEDBACK CONTROL control valve (5) and feed pump (15).
3. the reduction vaporization inspissator of recycling heat energy according to claim 1, it is characterized in that the pipeline between described water tank (8) and water pump (10) is provided with draining branch road, described draining branch road is provided with draining valve (9).
4. the reduction vaporization inspissator of recycling heat energy according to claim 1, is characterized in that described water tank (8) top is provided with overflow pipe (7).
5. the reduction vaporization inspissator of recycling heat energy according to claim 1, it is characterized in that described feed liquid closed circuit terminal pipeline is provided with atomizer (2), described atomizer (2) is placed in the top of evaporator (3) inside, feed liquid to be concentrated; The top of described evaporator (3) is provided with steam-water separator (21), and described steam-water separator (21) is placed in the top of evaporator (3) inside, feed liquid to be concentrated.
6. the reduction vaporization inspissator of recycling heat energy according to claim 1, is characterized in that described heat exchanger (13) is spiral heat exchanger.
7. the reduction vaporization inspissator of a recycling heat energy, comprise evaporator (3) and heat exchanger (13) that feed liquid to be concentrated is housed, characterized by further 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 by the inlet communication of pipeline and heat exchanger (13), the outlet of heat exchanger (13) is communicated with by the top of pipeline with evaporator (3), form 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 sampling arm between heat exchanger (13) and feed pump (15); Described water-flow circuit comprises hydraulic jet pump, water tank (8) and the solar energy hot-water tank (16) that two covers are connected, the bottom conduit 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).
8. the reduction vaporization inspissator of recycling heat energy according to claim 7, also automatic temperature control system is comprised described in it is characterized in that, described automatic temperature control system comprises the temperature sensor (6) being provided with evaporator (3) inside, and the control valve (5) of hydraulic jet pump two (2) import department, the temperature signal of the temperature sensor (6) in described evaporator (3) is passed to frequency converter (11) and FEEDBACK CONTROL control valve (5) and feed pump (15).
9. the reduction vaporization inspissator of recycling heat energy according to claim 7, it is characterized in that the pipeline between described water tank (8) and water pump (10) is provided with draining branch road, described draining branch road is provided with draining valve (9).
10. the reduction vaporization inspissator of recycling heat energy according to claim 7, is characterized in that described water tank (8) top is provided with overflow pipe (7).
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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 |
| CN109432809B (en) * | 2018-12-28 | 2024-02-27 | 深圳市鼎深科技有限公司 | Low-temperature efficient evaporation 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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