CN103512324A - Absorption type lithium bromide rapid clean drying system - Google Patents
Absorption type lithium bromide rapid clean drying system Download PDFInfo
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- CN103512324A CN103512324A CN201310450423.9A CN201310450423A CN103512324A CN 103512324 A CN103512324 A CN 103512324A CN 201310450423 A CN201310450423 A CN 201310450423A CN 103512324 A CN103512324 A CN 103512324A
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- preheater
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Abstract
The invention discloses an absorption type lithium bromide rapid clean drying system. A spraying device (9), a first preheater (5), a second preheater (6), a circulating fan (8) and a third preheater (7) are sequentially arranged in a sealing cavity body (2) from a drying gas outlet in a drying box to a drying gas inlet in the drying box, a lithium bromide dilute solution storage groove (11) is further formed in the position, arranged below the spraying device (9), inside the sealing cavity body (2), the lithium bromide dilute solution storage groove (11) is communicated with a generator (10), a heating device (14) is arranged in the generator (10), a liquid outlet in the generator (10) is connected with the solution spraying device (9) sequentially through the first preheater (5) and a cooling tower (3), and a gas outlet in the generator (10) is connected into the third preheater (7) to conduct heating. According to the system, the defects that in the prior art, according to material drying with the stricter cleanliness requirement, the control over the cleanliness of materials is hard are overcome.
Description
Technical field
The invention belongs to energy-conservation and dry field, be specifically related to the quick clean dried system of a kind of absorption lithium bromide.
Background technology
Current common dry materials mainly adopts combustion of fossil fuels to produce hot flue gas or electrically heated mode adds hot-air, utilizes blower fan that hot flue gas or hot-air are sent into material to be dried, accelerates moisture evaporation in material, thereby realizes being dried material.Yet low-temperature flue gas (or hot-air) used heat that the more difficult direct recycling volume flow of above drying means is huge, adopts directly emptying method conventionally, not only exists a large amount of heat loss.And the open drying process of the many employings of above method, in external environment, unclean composition easily diffuses into, and can have influence on the quality of dried material, is therefore used for drying the comparatively wide in range occasion of cleanliness factor requirement.
Summary of the invention
The object of the invention is to provide a kind of absorption lithium bromide quick clean dried system, has well solved in prior art for the stricter dry materials of cleanliness factor requirement, exists material degree of purity to control the difficult defects such as deficiency.
In order to solve these problems of the prior art, technical scheme provided by the invention is:
The quick clean dried system of lithium bromide, comprises drying box, closed cavity, and described closed cavity one end communicates with the outlet of drying box dry gas, and the other end communicates with the import of drying box dry gas; In closed cavity, from drying box dry gas, be exported to the import of drying box dry gas spray thrower, the first preheater, the second preheater, circulating fan, the 3rd preheater are installed successively; In above-mentioned closed cavity, be positioned at described spray thrower below and also there is bromize lithium dilute solution storage tank; Described bromize lithium dilute solution storage tank is communicated with generator, in described generator, is provided with heater, and described generator liquid outlet is connected with solution spraying device by the first preheater, cooling tower successively; Generator gas vent is connected in the 3rd preheater and heats.
Preferred technical scheme is: on described drying box, bottom surface is offered the through hole being communicated with closed cavity, lays material to be dried in described drying box; The minimum grain size of described material to be dried is greater than the maximum gauge of through hole.
Preferred technical scheme is: described generator arranged outside interfacial agent gas-phase adding apparatus, described interfacial agent gas-phase adding apparatus is communicated with generator by pipeline.
Preferred technical scheme is: described interfacial agent is selected from the one or more kinds of any combination of isooctanol, octanol, enanthol or hexanol.
Utilize described absorption lithium bromide clean dried system to carry out dry method, comprise following process:
Above-mentioned drying box, closed cavity, the first preheater, the second preheater, the 3rd preheater and circulating fan form the dry subsystem of circulating current; Above-mentioned generator, the 3rd preheater, the second preheater, the first preheater, cooling tower, spray thrower and lithium-bromide solution storage tank, form lithium-bromide solution dilution and regeneration subsystem.
Circulating current dry run: the dry subsystem of circulating current is closed system, needs to pour the recyclegas with wettability power of certain pressure before startup in above-mentioned closed cavity; Circulating current is under the driving of circulating fan, by the import of drying box dry gas, enter drying box, after circulating current has absorbed the moisture evaporating in material in drying box, water capacity improves, then from the outlet of drying box dry gas, discharge and enter bromize lithium concentrated solution spray district, the bromize lithium concentrated solution of spray thrower ejection fully absorbs the water vapour in circulating current, drop to bromize lithium dilute solution storage tank and becomes weak solution; Circulating current water capacity behind this region reduces, and then, after the first preheater, the second preheater and the 3rd preheater preheating, again by dry gas import, enters drying box.
Lithium-bromide solution dilution and regenerative process: the weak solution from bromize lithium dilute solution storage tank is processed and become two-way at generator, the heater of leading up to adds thermosetting steam, from gas circuit outlet, be that the 3rd preheater heats discharge, another road is concentrated as bromize lithium concentrated solution; Bromize lithium concentrated solution is after the first preheater is cooling, pass through again cooling tower cooling, then by spray thrower, be sprayed onto spray district, after water vapour in circulating current is absorbed, drop to bromize lithium dilute solution storage tank, and then enter heat exchanger cold side and start next round circulation.
Above-mentioned sealing moisture absorption gas circulation subsystem, need to adopt the hygroscopicity gas with wettability power as recycle stock, by hygroscopicity gas in closed cavity circulation, carry, transit steam dehumidifies, and common can be used as circulatory moisture absorption gas as air, N2 etc.The moisture absorption gas of selecting need to be under hot conditions saturated water capacity higher than the water capacity under cryogenic conditions, thereby in can circulating by closed cavity, the variation of moisture absorption gas temperature realizes material and dehumidifies.And the water capacity difference under high/low temperature condition is larger, more favourable for dehumidification process.
Above-mentioned sealing moisture absorption gas circulation subsystem is closed cavity circulation, only has that hygroscopicity gas absorbs, carries in closed cavity circulation, transportation and condensed steam dehumidifies, and whole dry materials process does not have other mass exchange with external environment.Thereby can avoid the secondary pollution of unclean composition to dried material in external environment, therefore have the effect of clean dried, the occasion and the composition to be dried that are particularly suitable for dried and clean degree to have relatively high expectations have the material that environmental pollution affects.
The sealing moisture absorption gas circulation subsystem of above-mentioned absorption lithium bromide drying system is closed circulation, needs to pour the recyclegas with wettability power of certain pressure before startup in above-mentioned closed circulation passage.Therefore operating pressure and circulating flow rate can be controlled, and by controlling operating pressure and the moisture absorption gas circulation amount of this closed cavity circulation, thereby can strictly control dry materials speed.And the operating pressure that can seal moisture absorption gas circulation subsystem by adjusting adjusts the baking temperature of material, guarantee the quality of material.Therefore this system has the advantages that operating temperature can strictly be controlled, the dry occasion that is particularly suitable for low temperature and temperature range is had relatively high expectations.
Compare with the biphase equilibrium system that air forms with the pure water with uniform pressure, in the biphase equilibrium system that lithium-bromide solution and air form, airborne steam partial pressure is starkly lower than the former, and reduces along with the raising of lithium-bromide solution concentration.Lithium-bromide solution is a kind of solution with strong wettability power, and along with the raising of solution concentration, the reduction of solution temperature, the wettability power of lithium-bromide solution is stronger.Therefore reduce the temperature of spray thrower outlet bromize lithium concentrated solution and improve the effective way that its concentration is raising system drying efficiency as far as possible.But be subject to the impact of saturation degree, excessively improve lithium-bromide solution concentration and can cause its crystallization, blocking channel, so the concentration of this system bromize lithium concentrated solution used need to be subject to the impact of saturation degree.The present invention adds interfacial agent by gas phase form, directly acts on sorbent surface, and the effect that performance strengthening absorbs, can accelerate rate of drying; Being used in conjunction with of heater and generator, accelerates concentrated lithium-bromide solution in addition, improves drying effect.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the quick clean dried system of absorption lithium bromide.
Number in the figure title: 1, drying box, 2, closed cavity, 3, cooling tower, 4, interfacial agent gas-phase adding apparatus, the 5, first preheater, the 6, second preheater, 7, the 3rd preheater, 8, circulating fan, 9, spray thrower, 10, generator, 11, bromize lithium dilute solution storage tank, 12, material to be dried, 13, circulating current, 14, heater.
The specific embodiment
Below in conjunction with specific embodiment, such scheme is described further.Should be understood that these embodiment are not limited to limit the scope of the invention for the present invention is described.The implementation condition adopting in embodiment can be done further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in normal experiment.
As shown in Figure 1, the quick clean dried system of this absorption lithium bromide, comprises drying box 1, closed cavity 2, and described closed cavity 2 one end communicate with drying box 1 dry gas outlet, and the other end communicates with the import of drying box dry gas; In closed cavity 2, from drying box dry gas, be exported to the import of drying box dry gas spray thrower 9, the first preheater 5, the second preheater 6, circulating fan 8, the 3rd preheater 7 are installed successively; In above-mentioned closed cavity 2, be positioned at described spray thrower 9 belows and also there is bromize lithium dilute solution storage tank 11; Described bromize lithium dilute solution storage tank 11 is communicated with generator 10, in described generator 10, is provided with heater 14, and described generator 10 liquid outlets are connected with solution spraying device 9 by the first preheater 5, cooling tower 3 successively; Generator 10 gas vents are connected in the 3rd preheater 7 and heat.
On described drying box 1, bottom surface is offered the through hole being communicated with closed cavity 2, the interior laying material to be dried of described drying box 1; The minimum grain size of described material to be dried is greater than the maximum gauge of through hole.
Described generator 10 arranged outside interfacial agent gas-phase adding apparatus 4, described interfacial agent gas-phase adding apparatus 4 is communicated with generator 10 by pipeline.
The course of work of absorption lithium bromide drying system is described below with reference to Fig. 1.The course of work of this system is as follows: the recyclegas with wettability power 13 that first needs to pour certain pressure before startup in above-mentioned closed cavity 2.Then start the circulating fan 8 of sealing moisture absorption gas circulation subsystem, recyclegas 13 is after overdriving, by drying box 1 distribution of gas hole, bottom, send into material to be dried 12, in drying box 1, unsaturated circulating current 13 absorbs after the moisture of material to be dried 12 evaporations, humidity increases, and the temperature of circulating current decreases simultaneously.Then the circulating current 13 that, carries a certain amount of water vapour enters dense lithium-bromide solution spray district.By dense lithium-bromide solution, fully absorbed after steam wherein, the vapour content in circulating current 13 decreases, and after the passage of the first preheater 5 and the second preheater 6 regions, again through circulating fan 8, drives and starts next round circulation.
Then, start lithium-bromide solution moisture absorption and regeneration subsystem, control check valve bromize lithium dilute solution is flowed in generator 10, the bromize lithium concentrated solution after concentrating is sent to spray thrower 9 by the first preheater 5.In order to improve the wettability power of bromize lithium concentrated solution, after preheating, increase cooling tower 3 by cooling water, after being lowered the temperature, bromize lithium concentrated solution is sent to spray thrower 9.Spray thrower 9 sprays bromize lithium concentrated solution and contacts with the circulating current 13 that approaches saturated humidity, after most of water vapor is wherein absorbed, bromize lithium concentrated solution becomes bromize lithium dilute solution and enters bromize lithium dilute solution storage tank 11, then in being admitted to generator 10, start next round circulation.After lithium-bromide solution moisture absorption and regeneration subsystem operating parameter are stable, so far, this system enters stable operation stage.
When heater is had an effect, can concentrate rapidly lithium-bromide solution.Interior material 12 mass dryness fractions of case 1 to be dried reach after certain requirement, cut off generator 10, first close lithium-bromide solution moisture absorption and regeneration subsystem, close afterwards circulating fan 8, last, open material drying box 1, take out and have met the requirements of dried material 12.
Above-mentioned example is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalent transformations that Spirit Essence is done according to the present invention or modification, within all should being encompassed in protection scope of the present invention.
Claims (4)
1. the quick clean dried system of absorption lithium bromide, is characterized in that, comprises drying box (1), closed cavity (2), and described closed cavity (2) one end communicates with the outlet of drying box (1) dry gas, and the other end communicates with the import of drying box dry gas; In closed cavity (2), from drying box dry gas, be exported to the import of drying box dry gas spray thrower (9), the first preheater (5), the second preheater (6), circulating fan (8), the 3rd preheater (7) are installed successively; In above-mentioned closed cavity (2), be positioned at described spray thrower (9) below and also there is bromize lithium dilute solution storage tank (11); Described bromize lithium dilute solution storage tank (11) is communicated with generator (10), in described generator (10), be provided with heater (14), described generator (10) liquid outlet is connected with solution spraying device (9) by the first preheater (5), cooling tower (3) successively; Generator (10) gas vent is connected in the 3rd preheater (7) and heats.
2. the quick clean dried system of absorption lithium bromide according to claim 1, is characterized in that on described drying box (1), bottom surface is offered the through hole being communicated with closed cavity (2), lays material to be dried in described drying box (1); The minimum grain size of described material to be dried is greater than the maximum gauge of through hole.
3. the quick clean dried system of absorption lithium bromide according to claim 1, it is characterized in that described generator (10) arranged outside interfacial agent gas-phase adding apparatus, described interfacial agent gas-phase adding apparatus is communicated with generator (10) by pipeline.
4. the quick clean dried system of absorption lithium bromide according to claim 3, is characterized in that described interfacial agent is selected from a kind of or two or more combinations of isooctanol, octanol, enanthol or hexanol.
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| CN201310450423.9A CN103512324A (en) | 2013-09-28 | 2013-09-28 | Absorption type lithium bromide rapid clean drying system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104562595A (en) * | 2014-12-23 | 2015-04-29 | 珠海格力电器股份有限公司 | Clothes dryer |
| CN109489384A (en) * | 2018-11-28 | 2019-03-19 | 青岛理工大学 | A kind of fire hose drying device based on solution dehumidification and flue gas heat recovery |
| CN109489387A (en) * | 2018-11-28 | 2019-03-19 | 青岛理工大学 | A kind of fire hose drying device based on solution dehumidification |
| CN109489386A (en) * | 2018-11-28 | 2019-03-19 | 青岛理工大学 | A kind of direct-fired solution dehumidification and the fire hose drying device of recuperation of heat |
| CN112172469A (en) * | 2020-10-21 | 2021-01-05 | 陈冬阳 | Heat energy reduction system for cooling automobile cab and operation method thereof |
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| WO1999032841A2 (en) * | 1997-12-04 | 1999-07-01 | Fedders Corporation | Liquid desiccant dehumidifier and air conditioner |
| CN1757993A (en) * | 2005-10-29 | 2006-04-12 | 大连海事大学 | Lithium bromide absorption type refrigerator and its gas phase addition method of surfactant |
| EP1816397A1 (en) * | 2006-02-02 | 2007-08-08 | Fritz Egger GmbH & Co | Method and device for heat recovery, from humid exhaust air |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104562595A (en) * | 2014-12-23 | 2015-04-29 | 珠海格力电器股份有限公司 | Clothes dryer |
| CN109489384A (en) * | 2018-11-28 | 2019-03-19 | 青岛理工大学 | A kind of fire hose drying device based on solution dehumidification and flue gas heat recovery |
| CN109489387A (en) * | 2018-11-28 | 2019-03-19 | 青岛理工大学 | A kind of fire hose drying device based on solution dehumidification |
| CN109489386A (en) * | 2018-11-28 | 2019-03-19 | 青岛理工大学 | A kind of direct-fired solution dehumidification and the fire hose drying device of recuperation of heat |
| CN112172469A (en) * | 2020-10-21 | 2021-01-05 | 陈冬阳 | Heat energy reduction system for cooling automobile cab and operation method thereof |
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Application publication date: 20140115 |