CN201373698Y - Combined secondary steam heat energy recovery device for conventional phase change heat exchanger of combined heat pump - Google Patents
Combined secondary steam heat energy recovery device for conventional phase change heat exchanger of combined heat pump Download PDFInfo
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- CN201373698Y CN201373698Y CN200920078829U CN200920078829U CN201373698Y CN 201373698 Y CN201373698 Y CN 201373698Y CN 200920078829 U CN200920078829 U CN 200920078829U CN 200920078829 U CN200920078829 U CN 200920078829U CN 201373698 Y CN201373698 Y CN 201373698Y
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Abstract
The utility model discloses a combined secondary steam heat energy recovery device for a conventional phase change heat exchanger of a combined heat pump, which aims at solving the technical problems that the existing secondary steam heat energy either cannot be utilized, or has low utilization rate or can effectively utilize secondary steam but has narrow application range. The technical scheme adopted is that: the recovery device consists of a conventional phase change heat exchanger, a vapor-water separator and a heat pump; the middle part of the conventional phase change heat exchanger is provided with a heat exchange pipe header; the upper end and the lower end of the heat exchange pipe header are respectively provided with an upper steam header and a lower water collecting and supplying tank; a heat exchange pipe in the heat exchange pipe header is respectively communicated with the upper steam header and the lower water collecting and supplying tank; the upper steam header is connected with a new steam connecting pipe; and the vapor-water separator is connected with the new steam connecting pipe of the upper steam header and connected with the lower water supplying tank by a down comer pipe. The combined heat pump is the combination of a mechanical compression heat pump and a steam jet heat pump. The recovery device has the advantages of high heat energy utilization rate and wide application range.
Description
Technical field
The utility model belongs to heat energy conversion and utilizes technical field, specifically relates to the heat energy recycle device of indirect steam.
Background technology
The generation of first and second steam:
In industries such as metallurgy, chemical industry, food, papermaking, weaving, pharmacy, daily use chemicals, desalinization, feed and environmental protection, in the production process with steam distill, concentrate, evaporation, boiling, drying, all to produce a large amount of indirect steams:
1, with steam to wet stock indirect dry run in, heating steam discharges heat of evaporation, conduction is heated material and condensation; Be heated material and absorb heat of evaporation, temperature rises, and when material temperature rise during to the boiling point of moisture content wherein, is heated material moisture content and absorbs a large amount of heat of evaporations, breaks away from material thereby be evaporated to indirect steam, and wet stock obtains drying.
2, with steam feed liquid (or solution) is being carried out in the indirect concentration and evaporation process, heating steam discharges heat of evaporation, and conduction is heated material (molten) liquid and condensation; Be heated material (molten) liquid and absorb the rising of heat of evaporation temperature, when material (molten) liquid temperature rise reaches the boiling point of moisture content wherein, be heated material (molten) liquid moisture content and absorb a large amount of heat of evaporations, be evaporated to the indirect steam that has a large amount of heat energy and break away from material (molten) liquid, make material (molten) liquid be able to evaporation and concentration.
3, with steam to many compositions part separated from solvent, carry out in direct (or indirectly) heating still-process, low boiling point solvent at first reaches boiling point, and absorb the heat of evaporation that a large amount of heating steams discharge, be evaporated to low boiling point solvent indirect steam high concentration, that have a large amount of heat energy, make the solvent component be able to separated.
Two, indirect steam heat energy recycle present situation
1, dry indirect steam utilizes present situation:
Because the indirect steam that dry run produces contains dust, the part indirect steam has corrosion and stench, and the indirect steam grade is lower, can't directly recycle, so prior art is done following processing to dry indirect steam:
A, indirect steam directly emptying after dedusting to not having corrosion and stench;
B, to after having the corrosion and the indirect steam of stench with cooling water condensation, condensate liquid decontamination water factory;
2, the concentration and evaporation indirect steam utilizes present situation:
The utilization of a, multiple-effect concentration evaporator indirect steam: the indirect steam that concentration and evaporation produces, stronger corrosivity is generally arranged, use after can not directly the indirect steam compression being improved temperature, pressure with the mechanical compression type heat pump, so adopt the multiple-effect concentration evaporator, with some evaporator series, except that first single-effect evaporator operates under the barotropic state, all the other evaporimeters all are in than the low negative pressure state of a last effect and move, 1st effective evaporator adopts heat supply network for steam, and the indirect steam of going up 1st effective evaporator is all adopted in all the other each single-effect evaporator heating; Influenced by the concentrate feed fluid viscosity, multi-effect evaporator generally is no more than 6 and imitates, and a unit heat supply network steam can evaporate and be no more than 5 unit moisture approximately basically;
B, mechanical compression type heat pump are to the recycling of indirect steam heat energy: if do not contain dust and corrosive gas in the indirect steam, can adopt the mechanical compression type heat pump directly to being back to the feed liquid evaporation after the indirect steam pressurization; This method secondary steam utilization is most effective, and 1 unit heat supply network steam can evaporate that to be not less than be the moisture of 100 units, the above moisture content of every KWH power consumption evaporation 22kg;
3, returning of distillation indirect steam utilized present situation:
A, the solvent indirect steam is reclaimed heat energy with soft water cooling; But, heat energy can not be made full use of because boiler is limited with soft water.
B, differential distillation utilize indirect steam heat energy: with two cover distilling apparatus series connection, and the first covering device operation under positive pressure, with Steam Heating that heat supply network is supplied, the solvent indirect steam of its generation is as the heating source of the second cover distilling apparatus; Because the indirect steam temperature of solvent is lower, so the second cover distilling apparatus must move under negative pressure and could reliably distill; The solvent indirect steam temperature that the second cover distilling apparatus produces is lower, and heat energy can not utilize again, but this device can make the distillation energy consumption reduce about 40%.
Three, in sum: the heat energy recycle of prior art indirect steam, maybe can not utilize, or the heat energy utilization rate is low, though or can efficiently utilize indirect steam heat energy, range of application is very little.And the technical products that the phase-change heat-exchange type secondary steam heat energy recycle method and apparatus that the utility model proposes is developed at general efficient utilization of indirect steam just.
The utility model content
Though the utility model maybe can not utilize at existing indirect steam heat energy or the heat energy utilization rate is low or can efficiently utilize indirect steam heat energy, but the present situation that range of application is very little, the conventional phase-change heat-exchanger combination of a kind of combined heat-pump indirect steam heat-energy recovering apparatus is proposed, to overcome the problems referred to above that prior art exists.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is as follows:
The conventional phase-change heat-exchanger combination of combined heat-pump indirect steam heat-energy recovering apparatus is characterized in that: be made of conventional phase-change heat-exchanger, steam-water separator, heat pump; There is a heat exchange bobbin carriage at described conventional phase-change heat-exchanger middle part, and two ends are provided with respectively and collect steam chest, next part supply tank about the heat exchange bobbin carriage; Be connected with indirect steam air inlet pipe, indirect steam condensation wastewater drainage pipe on the heat exchange bobbin carriage, noncondensing gas blast pipe; Heat-exchanging tube bundle in the heat exchange bobbin carriage is communicated with last collection steam box, next part supply tank respectively; Last collection steam chest is connected with the initial steam tube connector; Described steam-water separator is that drum is connected with the initial steam tube connector of last collection steam chest, the initial steam blast pipe is set on it, and is connected with supply tank through down-comer; Described combined heat-pump is the combination of mechanical compression type heat pump and steam jet heat pump.
Adopt the saturated condensed water of drying machine, distiller or inspissator to be used for evaporation as phase-change heat-exchanger, steam-water separator can doublely be made the elevated tank of water supply.
The inlet end of described mechanical compression type heat pump is connected with the initial steam blast pipe of steam-water separator, the outlet side is connected with the suction end of steam jet heat pump, the outlet side of steam jet heat pump connects the heating steam pipeline, or the suction end of described steam jet heat pump is connected with the initial steam blast pipe of steam-water separator, the outlet side is connected with the inlet end of mechanical compression type heat pump, and the outlet side of mechanical compression type heat pump connects the heating steam pipeline.
The beneficial effects of the utility model show:
One, is applied to drying for phase-change heat-exchange type secondary steam heat energy recycle device
The processing mode of existing dry indirect steam all can not reclaim the dry indirect steam that produces, and has wasted a large amount of heat energy, and has caused environmental thermal pollution.After having adopted phase-change heat-exchange type secondary steam heat energy recycle device, avoid indirect steam to contain dust fully or corrosion has been arranged and stench and the problem that can't recycle has been saved a large amount of heat energy, reduced thermal pollution.
Two, be applied to concentrate for phase-change heat-exchange type secondary steam heat energy recycle device
The existing mechanical compression type heat pump that adopts is to concentrating the recycling of indirect steam heat energy, and because of not containing dust and corrosivity composition in the indirect steam, therefore, its scope of application is extremely limited.Adopt phase-change heat-exchange type secondary steam heat energy recycle device, avoided to contain the problem of dust and corrosivity composition in the indirect steam, thereby enlarged the scope of application of the highest concentrated mode of this indirect steam utilization ratio greatly.
Three, be applied to distillation for phase-change heat-exchange type secondary steam heat energy recycle device
Adopt phase-change heat-exchange type secondary steam heat energy recycle device, avoided differential distillation need use two problems of overlapping distilling apparatus, and the steam thermal energy utilization rate is higher; Simultaneously, solvent need not pass through the mechanical compression type heat pump again, needn't worry to be polluted, and has guaranteed quality; And the heat energy utilization of the initial steam that produces is convenient, can use the heat pump of various ways to utilize.
Four, adopt technical indicator of the present utility model:
A, the every KWH electric energy of mechanical compression type heat pump reclaim indirect steam greater than 20kg (steam)/KWH;
B, steam jet heat pump: do not consume effective heat energy substantially;
C, indirect steam loss＜10%;
D, vapour pressure can increase: 30 ~ 150Kpa;
E, per unit steam can evaporate＞90 unit moisture content;
Below by specific embodiment the utility model is further elaborated.
Description of drawings
Fig. 1 adopts the structure principle chart of mechanical compression type heat pump before steam jet heat pump for the utility model
Fig. 2 adopts the structure principle chart of mechanical compression type heat pump behind steam jet heat pump for the utility model
Fig. 3 is a conventional phase-change heat-exchanger structural representation among the utility model Fig. 1, Fig. 2
Fig. 4 is applied to the drying equipment schematic diagram for the utility model
Fig. 5 is applied to the distillation equipment schematic diagram for the utility model
The specific embodiment
Embodiment 1: phase-change heat-exchange type secondary steam heat energy recycle device:
Phase-change heat-exchange type secondary steam heat energy recycle device by phase-change heat-exchanger, steam-water separator, take out negative pressure machinery compression heat pump or steam jet heat pump or their combination and connect to form through pipeline and (see Fig. 1-Fig. 3);
1) conventional phase-change heat-exchanger
Conventional phase-change heat-exchanger is formed schematic diagram as shown in Figure 3, by the heat exchange bobbin carriage, the next part supply tank, on collect steam chest, indirect steam condensed water and noncondensing gas comb constitute; It mainly acts on is that vapour phase (dirty, the corrosion) indirect steam that will enter the heat exchange bobbin carriage is condensed into the liquid phase saturation water, and discharges a large amount of thermal energy conduction in the water that enters through the next part case in the heat exchanger tube, water is heated is evaporated to vapour phase clean water steam; Because hot conduction must be to carry out under certain temperature difference condition, therefore must take to take out the mode of negative pressure, make the interior steam saturation pressure of heat exchanger tube be lower than the saturation pressure of indirect steam, the boiling point of water is lower than the saturation temperature of indirect steam in the heat exchanger tube, thereby reliably promptly finishes phase-change heat-exchange; The evaporation water can be used industrial soft water, but preferably adopts the condensed water of dry and distillation or concentrated heating steam, to reclaim the sensible heat of condensed water;
2) steam-water separator: also claim drum, it mainly acts on is that upper collecting chamber is separated through the steam that the rising tube connector enters drum, moisture content is stayed in the drum liquid phase and through the decline tube connector and is delivered in the next part case for the evaporation use, adopt the saturated condensed water of drying machine, distiller or inspissator to be used for evaporation as phase-change heat-exchanger, drum can doublely be made the elevated tank of water supply;
3) take out the combination (seeing Fig. 1-2, Fig. 4-6) of negative pressure machinery compression heat pump or steam jet heat pump, its effect has two: one, the steam that phase-change heat-exchanger produces is all extracted out, and boosted to spendable steam quality, heating network or with hot equipment use; The 2nd, must make the boiling point of water in the heat exchanger tube be lower than the indirect steam saturation temperature more than 5 ℃, thereby indirect steam phase inversion heat energy is normally carried out in the built-in upright certain negative pressure value that is lower than the indirect steam saturation pressure of phase inversion heat pipe;
4) operation principle
Take out in the combination of mechanical compression type heat pump and steam jet heat pump under the effect of negative pressure, in the steam-water separator, phase-change heat-exchanger heat exchanger tube, upper and lower collection case and tube connector, all be in the subnormal ambient that is lower than the indirect steam saturation pressure; Enter evaporation water in the heat exchange evaporator tube from phase-change heat-exchanger next part case, boiling point is brought down below the level of indirect steam saturation temperature more than 5 ℃; Continuously feed indirect steam at phase-change heat-exchanger heat exchange bobbin carriage (outside the heat exchanger tube) this moment, because the saturation temperature of indirect steam is higher than the boiling temperature of evaporation water, indirect steam is condensed and discharges a large amount of evaporation latent heats, evaporation water in the heat exchanger tube is given in conduction, after the evaporation water temperature rises to boiling point in the heat exchanger tube, absorb the heat of evaporation of a large amount of indirect steams and be evaporated to water vapour, swabbing action by heat pump, this steam is through phase-change heat-exchange evaporimeter upper collecting chamber, the rising tube connector enters heat pump after steam-water separator separates moisture content, under the compression of heat pump, but become the clean steam heating network of using character or use with hot equipment.
Embodiment 2: phase-change heat-exchange type secondary steam heat energy recycle device is applied to drying equipment
Phase-change heat-exchange type secondary steam heat energy recycle device is applied to drying principles as shown in Figure 4: be phase-change heat-exchange type secondary steam heat energy recycle device among the figure in the frame of broken lines.
A heating steam is carried out indirect to wet stock, and a heating steam discharges heat of evaporation, and material is given in conduction and condensation is expelled to phase-change heat-exchange type secondary steam heat energy recycle device from drain valve; Wet stock absorbs heat of evaporation, when temperature rises to the boiling point of moisture content wherein, is evaporated to indirect steam and breaks away from material and enter phase-change heat-exchange type secondary steam heat energy recycle device, and the wet stock drying is a dry material.
After indirect steam and saturated condensed water enter phase-change heat-exchange type secondary steam heat energy recycle device, indirect steam is condensed into secondary wastewater and discharges, clean saturated condensed water is transformed to clean heating steam output, this steam can use for other thermal hardwares, or can be used as the use of primary steam supply drying machine self.
Embodiment 3: phase-change heat-exchange type secondary steam heat energy recycle device is applied to concentrator
Primary steam carries out the indirect concentration and evaporation to weak solution in concentration tank, a heating steam discharges heat of evaporation, and conduction is condensed into condensed water one time to being heated solution; Weak solution absorbs the heat of evaporation temperature and rises when reaching the boiling point of moisture content wherein, absorbs a large amount of heat of evaporations, is evaporated to the indirect steam that has a large amount of heat energy and breaks away from solution, and making solution be able to evaporation and concentration is concentrated solution.
After indirect steam and a condensed water enter phase-change heat-exchange type secondary steam heat energy recycle device, indirect steam is condensed into secondary wastewater and discharges, a clean condensed water is transformed to clean heating steam output, this steam is re-used as primary steam and supplies with concentration tank self use, only need the outer primary steam that supplies seldom, concentration process is proceeded, this method steam utilization is most effective, 1 unit primary steam can evaporate that to be not less than be the moisture content of 100 units, the above moisture content of every KWH power consumption evaporation 22kg.
Embodiment 4: phase-change heat-exchange type secondary steam heat energy recycle device is applied to distillation equipment
Phase-change heat-exchange type secondary steam heat energy recycle device is applied to distill principle as shown in Figure 5, is phase-change heat-exchange type secondary steam heat energy recycle device in the frame of broken lines among the figure.
Primary steam heats in the still-process many compositions part solvent, low boiling point solvent at first reaches boiling point, and absorb the heat energy that a large amount of heating steams discharge, and be evaporated to low boiling point solvent indirect steam high concentration, that have a large amount of heat energy, make the solvent component be able to separated.
After solvent indirect steam and a condensed water enter phase-change heat-exchange type secondary steam heat energy recycle device, the solvent indirect steam is condensed into secondary solvent liquid and discharges, a clean condensed water is transformed to clean heating steam output, this steam is re-used as primary steam and supplies with distiller self use, only need the outer primary steam that supplies seldom, still-process is proceeded; Also can make heating steam uses for other thermal hardwares.
Claims (3)
1, the conventional phase-change heat-exchanger combination of combined heat-pump indirect steam heat-energy recovering apparatus is characterized in that: be made of conventional phase-change heat-exchanger, steam-water separator, heat pump; There is a heat exchange bobbin carriage at described conventional phase-change heat-exchanger middle part, and two ends are provided with respectively and collect steam chest, next part supply tank about the heat exchange bobbin carriage; Be connected with indirect steam air inlet pipe, indirect steam condensation wastewater drainage pipe on the heat exchange bobbin carriage, noncondensing gas blast pipe; Heat-exchanging tube bundle in the heat exchange bobbin carriage is communicated with last collection steam box, next part supply tank respectively; Last collection steam chest is connected with the initial steam tube connector; Described steam-water separator is that drum is connected with the initial steam tube connector of last collection steam chest, the initial steam blast pipe is set on it, and is connected with supply tank through down-comer; Described combined heat-pump is the combination of mechanical compression type heat pump and steam jet heat pump.
2, the conventional phase-change heat-exchanger combination of combined heat-pump according to claim 1 indirect steam heat-energy recovering apparatus, it is characterized in that: the inlet end of described mechanical compression type heat pump is connected with the initial steam blast pipe of steam-water separator, the outlet side is connected with the suction end of steam jet heat pump, and the outlet side of steam jet heat pump connects the heating steam pipeline.
3, the conventional phase-change heat-exchanger combination of combined heat-pump according to claim 1 indirect steam heat-energy recovering apparatus, it is characterized in that: or the suction end of described steam jet heat pump is connected with the initial steam blast pipe of steam-water separator, the outlet side is connected with the inlet end of mechanical compression type heat pump, and the outlet side of mechanical compression type heat pump connects the heating steam pipeline.
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| CN200920078829U CN201373698Y (en) | 2009-01-22 | 2009-01-22 | Combined secondary steam heat energy recovery device for conventional phase change heat exchanger of combined heat pump |
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| CN200920078829U CN201373698Y (en) | 2009-01-22 | 2009-01-22 | Combined secondary steam heat energy recovery device for conventional phase change heat exchanger of combined heat pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777874A (en) * | 2012-08-30 | 2012-11-14 | 郑州大学 | Phase change heat accumulation system for generating steam directly and preparation method of phase change heat accumulation agent |
| CN106838853A (en) * | 2016-12-16 | 2017-06-13 | 哈尔滨工大金涛科技股份有限公司 | The regeneration device of non-clean steam |
-
2009
- 2009-01-22 CN CN200920078829U patent/CN201373698Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777874A (en) * | 2012-08-30 | 2012-11-14 | 郑州大学 | Phase change heat accumulation system for generating steam directly and preparation method of phase change heat accumulation agent |
| CN102777874B (en) * | 2012-08-30 | 2015-02-04 | 郑州大学 | Phase change heat accumulation system for generating steam directly and preparation method of phase change heat accumulation agent |
| CN106838853A (en) * | 2016-12-16 | 2017-06-13 | 哈尔滨工大金涛科技股份有限公司 | The regeneration device of non-clean steam |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DONGFANG ELECTRIC GROUP DONGFANG MOTOR CO., LTD. Free format text: FORMER OWNER: DFEM CONTROL EQUIPMENT CO., LTD. Effective date: 20130614 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130614 Address after: 618000 the Yellow River West Road, Sichuan, China, No. 188, No. Patentee after: Dongfang Electric Group Dongfang Motor Co., Ltd. Address before: 618000 the Yellow River West Road, Sichuan, China, No. 188, No. Patentee before: DFEM Control Equipment Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20091230 |
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| CX01 | Expiry of patent term |