CN102012157A - Energy-efficient drying system - Google Patents
Energy-efficient drying system Download PDFInfo
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- CN102012157A CN102012157A CN 201010570239 CN201010570239A CN102012157A CN 102012157 A CN102012157 A CN 102012157A CN 201010570239 CN201010570239 CN 201010570239 CN 201010570239 A CN201010570239 A CN 201010570239A CN 102012157 A CN102012157 A CN 102012157A
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Abstract
The invention discloses an energy-efficient drying system which comprises a drying channel and a heat exchange device, wherein the drying tunnel consists of a cold air channel and a hot air channel; one end of the cold air channel is provided with an air inlet, and one end of the hot air channel is provided an air outlet; the air inlet and the air outlet are communicated through the cold air channel and the hot air channel; two ends of the hot air channel are respectively provided with a first fan and a second fan; the heat exchange device comprises a boiler, a main valve, a filter, a reducing valve, a solenoid valve, a first evaporator and a drain valve which are sequentially connected through pipelines; the air in the drying channel exchanges heat with the first evaporator and is circulated in the drying channel through the first fan and the second fan; and a phase recovery device is connected behind the drain valve and is connected with the boiler. In the energy-efficient drying system of the invention, the phase recovery device is utilized to reuse the heat exhausted by the drain valve and condense high-temperature vapor to valuable soft water, thereby improving the work efficiency of the boiler; and in addition, the recovery rate can be up to more than 95%.
Description
Technical field
The present invention relates to the drying plant technical field, particularly a kind of energy-saving drying system.
Background technology
At present, the oven dry of materials such as vegetables, squid class aquatic products is generally all carried out in drying tunnel or drying machine, the thermal source of drying tunnel provides by boiler water steam, and heat is dried material by using the blower fan forced air to circulate to bring in the drying tunnel between drying tunnel and heat-exchange device.Heat-exchange device is made up of steam pipework, it comprises boiler, steam pipe, main valve, filter, pressure-reducing valve, electric work magnetic valve, evaporimeter and the drain valve of series connection successively, the steam that boiler produces carries out heat exchange by cold air in evaporimeter and the drying tunnel, form hot-air, under fan action, hot and cold air circulates in drying tunnel, thus the oven dry material, and the soft water of condensation is drained by drain valve after the evaporimeter heat exchange.
Yet present domestic employing drying tunnel is the following problem of ubiquity during as drying plant:
1. the drain valve kind of heat-exchange device is more various, and can reduce two big classes: heat power type and mechanical type, result of use are generally undesirable.Homemade drain valve is hot power substantially, heat power type drain valve, since its structure and operating principle, the easy steam leakage of drain valve, water, vapour are discharged simultaneously, misoperation is many, in that do not have under the situation of water also can steam discharge, causes the waste of a large amount of living steam, slip is 6%～10%, not energy-conservation, and fragile, service life is short.And the mechanical type drain valve (as the full ball float of lever, hang upside down the bucket etc.) also because of structural reason, very easily wearing and tearing, cause steam leakage, generally 3%～6%.
2. the electronic steam valve of heat-exchange device job insecurity when steam pressure is excessive easily is not closed completely, and causes temperature fluctuation, continues the heating meeting in this case the quality of product is exerted an influence.
3. at the initial stage of drying materials, hot blast can be mingled with a lot of steam after in drying tunnel material being dried, and it is bad that the hot blast that has been mingled with steam carries out the circulation time drying effect again.
Summary of the invention
At the deficiencies in the prior art, the invention provides a kind of energy-saving drying system, it comprises drying tunnel and heat-exchange device, drying tunnel is made up of cold air duct and hot-air channel, one end of cold air duct is an air inlet, one end of hot-air channel is an exhaust outlet, air inlet communicates with exhaust outlet, the hot-air channel two ends are respectively equipped with first blower fan and second blower fan, heat-exchange device comprises the boiler that connects successively by pipeline, main valve, filter, pressure-reducing valve, magnetic valve, first evaporimeter and drain valve, the air and first evaporimeter in the drying tunnel carry out heat exchange, and in drying tunnel, circulate by first blower fan and second blower fan, be connected with the phase retracting device behind the drain valve, the phase retracting device is connected with boiler.
Further, the phase retracting device comprises second evaporimeter and recovery tank, and this recovery tank is connected with the water tank of boiler.
Further, the phase retracting device is a recovery tank, and recovery tank is connected with boiler.
Further, be provided with fluid level control device in the recovery tank.
Further, be provided with back water pump between recovery tank and the boiler.
Adopt the beneficial effect of technique scheme to be: second evaporimeter is installed behind drain valve can be cooled off the steam and the condensate water of leaking effectively once more, cooled water collects in the recovery tank, when water in the water tank reaches the water level of fluid level control device setting, back water pump is worked automatically, water is delivered to the water tank of boiler, utilize once more; Only install back water tank behind drain valve, collect in the recovery tank through the soft water of first evaporator condensation, when water reached the water level that fluid level control device sets in the water tank, back water pump was worked automatically, and water is delivered to the water tank of boiler, utilized once more.
Further, be provided with electronic deep bead between air inlet and the exhaust outlet.
Adopt the beneficial effect of technique scheme to be: advance, the exhaust outlet place installs electronic windshield plate additional, initial stage in drying is excessive owing to product moisture content, air is all discharged, can when reaching setting value, moisture manually electronic windshield plate be fallen according to production technology, this moment, a part of Hot air quilt sucked air inlet, thereby the load that has alleviated drying tunnel has been saved the energy.
Further, magnetic valve is an air-operated solenoid valve.
Adopt the beneficial effect of technique scheme to be: replaced electronic steam valve with pneumatic steam valve (pneumatic angle pedestal valve), can hundred-percent valve-off.
Further, also be connected with by-passing valve between the filter and first evaporimeter, this by-passing valve is in parallel with pressure-reducing valve and magnetic valve.
Further, the body of wall appearance of drying tunnel is surrounded by heat-insulation layer.
The invention has the beneficial effects as follows: the heat that the energy-saving drying system of the present invention adopts the phase retracting device that drain valve is discharged utilizes once more, high-temperature steam is condensed into valuable soft water, improve the boiler operating efficiency, the rate of recovery can reach more than 95%, not only save available in a large number " sensible heat ", and can significantly reduce boiler feed water and industrial water, also reduced the sewage emissions amount simultaneously.
Description of drawings
Fig. 1 is the structural front view of the energy-saving drying system of the present invention;
Fig. 2 is the structure upward view of the energy-saving drying system of the present invention.
In the accompanying drawing, the list of parts of each label representative is as follows:
1 cold air duct, 2 hot-air channels, 4 air inlets, 5 exhaust outlets, 6 first blower fans, 7 second blower fans, 8 electronic deep beads, 9 wind direction boards, 30 blowoff valves, 31 boilers, 32 main valves, 33 filters, 34 pressure-reducing valves, 35 air-operated solenoid valves, 36 first evaporimeters, 37 drain valves, 38 by-passing valves, 39 Pressure gauges, 41 second evaporimeters, 42 recovery tanks, 43 back water pumps.
The specific embodiment
Mode by the following examples further specifies the present invention, does not therefore limit the present invention among the described scope of embodiments.
As shown in Figure 1, a kind of energy-saving drying system, it comprises drying tunnel and heat-exchange device, the body of wall appearance of drying tunnel is surrounded by heat-insulation layer.Drying tunnel is made up of cold air duct 1 and hot-air channel 2, one end of cold air duct 1 is an air inlet 4, one end of hot-air channel 2 is an exhaust outlet 5, air inlet 4 is connected by cold air duct and hot-air channel with exhaust outlet 5, be provided with electronic deep bead 8 between air inlet 4 and the exhaust outlet 5, hot-air channel 2 two ends are respectively equipped with first blower fan 6 and second blower fan 7, the air outlet place of first blower fan 6 is provided with wind direction board 9, heat-exchange device comprises the boiler 31 of series connection successively, main valve 32, filter 33, pressure-reducing valve 34, air-operated solenoid valve 35, first evaporimeter 36 and drain valve 37, the steam that boiler 31 produces enters filter 33 by main valve 32 controls, the impurity that filters is discharged through blowoff valve 30, pressure-reducing valve 34 and air-operated solenoid valve 35 series connection backs are in parallel with by-passing valve 38,38 liang of lateral lines of by-passing valve are provided with Pressure gauge 39, when reaching certain value, the steam pressure after filtering enters first evaporimeter 36 through pressure-reducing valve 34 and magnetic valve 35, when the steam pressure value after filtering is excessive, steam enters first evaporimeter 36 by by-passing valve 38, the air and first evaporimeter 36 in the drying tunnel carry out heat exchange, and in drying tunnel, circulate by first blower fan 6 and second blower fan 7, the air outlet place of first blower fan 6 is provided with wind direction board 8, is connected with the phase retracting device behind the drain valve 37.
This phase retracting device comprises second evaporimeter 41 and recovery tank 42, one end of second evaporimeter 41 is connected with drain valve 37, the other end is connected with recovery tank 42, recovery tank 42 is connected with the water tank of boiler 31, first evaporimeter 36 passes through drain valve 37 exhaust steams and condensed water after heat exchange, in drain valve 37 backs second evaporimeter 41 being installed can cool off the steam and the condensate water of leaking effectively once more, cooled water collects in the recovery tank 42, simultaneously, the condensed water that drain valve 37 is discharged can directly collect in recovery tank 42 by pipeline, be provided with back water pump 43 between recovery tank 42 and the boiler 31, be provided with fluid level control device in the recovery tank 42.When the water in the recovery tank 42 reached the water level that fluid level control device sets, back water pump 43 was worked automatically, and water is delivered to the water tank of boiler 31, utilized once more.
No matter be drying tunnel, or the quantity of heat production of similar devices such as drying machine own is quite big, if the drying tunnel distance is too short, heat can not be absorbed fully, can cause very big waste, and the drying tunnel distance that suitably extends can reduce heat loss, improves heat utilization ratio.
Below by calculating the energy-saving benefit further specify the energy-saving drying system of the present invention.
The rate of recovery of condensed water in high temperature reaches more than 95%, and its water temperature can reach more than 85 ℃, if 85 ℃ condensed water in high temperature is recycled to the place that the boiler room softened water tank maybe need be used hot water, then its energy-saving benefit can calculate by heating power and learn:
Be heated to 85 ℃ of amounts that need the 0.2MPa saturated vapor as cold water 1 ton 20 ℃.
Q suction=Q is put,
Q is put=Q latent heat+Q sensible heat,
Wherein,
Q latent heat is condensed into 20 ℃ saturation water institute liberated heat for the 0.2MPa saturated vapor;
The Q sensible heat is that the 0.2MPa saturation water changes 85 ℃ of water time institute liberated heats at 20 ℃.
Therefore,
m
1×c×〔（273＋85）－（273＋20）〕×4.187
＝m
2×c′＋m
2×c×〔（273＋120）－（273＋85）〕×4.187
That is:
1000×1×（358－293）×4.187
＝m
2×〔2202＋1×（393－358）×4.187〕
The quality that obtains water vapour is:
m
2=(1000 * 1 * 65 * 4.187)/(2202+1 * 35 * 4.187)=116(kilogram)
This shows, 1 ton 20 ℃ cold water are heated to 85 ℃ need 116 kilograms of 0.2MPa saturated vapors, conversely, reclaim 1 ton 85 ℃ condensed water in high temperature and can save 116 kilograms of 0.2MPa saturated vapors.
Below by testing the energy-saving benefit that example illustrates the energy-saving drying system of the present invention.
Method of testing: under the identical condition of boiler supplying vapor (steam) temperature, in different time serviceability temperature meter layer position, the hot-air channel upper, middle and lower temperature of testing domestic existing drying tunnel drying system and the energy-saving drying system of the present invention simultaneously respectively, test data is as shown in table 1.
Domestic existing drying tunnel of table 1 and the energy-saving drying system temperature acquisition of the present invention data
As can be seen from Table 1, the heat that the energy-saving drying system of the present invention is discharged drain valve utilizes once more, saves available in a large number " sensible heat ".
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. energy-saving drying system, it comprises drying tunnel and heat-exchange device, described drying tunnel is made up of cold air duct and hot-air channel, one end of cold air duct is an air inlet, one end of hot-air channel is an exhaust outlet, air inlet is connected by cold air duct and hot-air channel with exhaust outlet, described hot-air channel two ends are respectively equipped with first blower fan and second blower fan, described heat-exchange device comprises the boiler that connects successively by pipeline, main valve, filter, pressure-reducing valve, magnetic valve, first evaporimeter and drain valve, the air and first evaporimeter in the described drying tunnel carry out heat exchange, and in drying tunnel, circulate by first blower fan and second blower fan, it is characterized in that: be connected with the phase retracting device behind the described drain valve, described phase retracting device is connected with boiler.
2. a kind of energy-saving drying system according to claim 1 is characterized in that: described phase retracting device comprises second evaporimeter and recovery tank, and described recovery tank is connected with boiler.
3. a kind of energy-saving drying system according to claim 1 is characterized in that: described phase retracting device is a recovery tank, and described recovery tank is connected with boiler.
4. according to claim 2 or 3 described a kind of energy-saving drying systems, it is characterized in that: be provided with fluid level control device in the described recovery tank.
5. according to claim 2 or 3 described a kind of energy-saving drying systems, it is characterized in that: be provided with back water pump between described recovery tank and the boiler.
6. according to claim 1 or 2 or 3 described a kind of energy-saving drying systems, it is characterized in that: be provided with electronic deep bead between described air inlet and the exhaust outlet.
7. according to claim 1 or 2 or 3 described a kind of energy-saving drying systems, it is characterized in that: described magnetic valve is an air-operated solenoid valve.
8. according to claim 1 or 2 or 3 described a kind of energy-saving drying systems, it is characterized in that: also be connected with by-passing valve between the described filter and first evaporimeter, this by-passing valve is in parallel with pressure-reducing valve and magnetic valve.
9. according to claim 1 or 2 or 3 described a kind of energy-saving drying systems, it is characterized in that: the body of wall appearance of described drying tunnel is surrounded by heat-insulation layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010570239 CN102012157A (en) | 2010-12-02 | 2010-12-02 | Energy-efficient drying system |
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| CN 201010570239 CN102012157A (en) | 2010-12-02 | 2010-12-02 | Energy-efficient drying system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109005746A (en) * | 2018-07-13 | 2018-12-18 | 湖南省农友机械集团有限公司 | A kind of steam heated constant temperature constant humidity generating device |
| CN115200348A (en) * | 2022-07-25 | 2022-10-18 | 冯鑫 | Starch clot drying and pulverizing equipment |
Citations (8)
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| US4580354A (en) * | 1983-05-18 | 1986-04-08 | Stora Kopparbergs Bergslags Ab | Method and device for measuring humidity |
| CN1195764A (en) * | 1997-04-04 | 1998-10-14 | 杨蒲义 | Equipment and method for quick drying tunnel |
| CN201093857Y (en) * | 2007-07-18 | 2008-07-30 | 刘奇贤 | Airflow drying energy saving apparatus |
| WO2008133583A1 (en) * | 2007-04-26 | 2008-11-06 | Valutec Ab | Method for dynamic control of the drying period in a drying tunnel |
| CN201373387Y (en) * | 2009-02-09 | 2009-12-30 | 浙江四通化纤有限公司 | Novel energy-saving oil-firing boiler |
| CN201429307Y (en) * | 2009-04-04 | 2010-03-24 | 迟永江 | Energy-saving dryer |
| CN201569268U (en) * | 2009-10-28 | 2010-09-01 | 山东华义玉米科技有限公司 | Thermal energy utilization device |
| CN201885537U (en) * | 2010-12-02 | 2011-06-29 | 蓬莱京鲁渔业有限公司 | Energy-saving type drying system |
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2010
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4580354A (en) * | 1983-05-18 | 1986-04-08 | Stora Kopparbergs Bergslags Ab | Method and device for measuring humidity |
| CN1195764A (en) * | 1997-04-04 | 1998-10-14 | 杨蒲义 | Equipment and method for quick drying tunnel |
| WO2008133583A1 (en) * | 2007-04-26 | 2008-11-06 | Valutec Ab | Method for dynamic control of the drying period in a drying tunnel |
| CN201093857Y (en) * | 2007-07-18 | 2008-07-30 | 刘奇贤 | Airflow drying energy saving apparatus |
| CN201373387Y (en) * | 2009-02-09 | 2009-12-30 | 浙江四通化纤有限公司 | Novel energy-saving oil-firing boiler |
| CN201429307Y (en) * | 2009-04-04 | 2010-03-24 | 迟永江 | Energy-saving dryer |
| CN201569268U (en) * | 2009-10-28 | 2010-09-01 | 山东华义玉米科技有限公司 | Thermal energy utilization device |
| CN201885537U (en) * | 2010-12-02 | 2011-06-29 | 蓬莱京鲁渔业有限公司 | Energy-saving type drying system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109005746A (en) * | 2018-07-13 | 2018-12-18 | 湖南省农友机械集团有限公司 | A kind of steam heated constant temperature constant humidity generating device |
| CN109005746B (en) * | 2018-07-13 | 2021-08-24 | 湖南省农友机械集团有限公司 | Steam heating constant temperature and humidity generating device |
| CN115200348A (en) * | 2022-07-25 | 2022-10-18 | 冯鑫 | Starch clot drying and pulverizing equipment |
| CN115200348B (en) * | 2022-07-25 | 2023-09-29 | 德州高峰淀粉有限公司 | Starch clot stoving powder process equipment |
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Application publication date: 20110413 |