CN100483054C

CN100483054C - Drying machines

Info

Publication number: CN100483054C
Application number: CNB2006100626858A
Authority: CN
Inventors: 车炳雷
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-09-19
Filing date: 2006-09-19
Publication date: 2009-04-29
Anticipated expiration: 2026-09-19
Also published as: CN1920456A

Abstract

The invention relates to a drier, for improving the drying speed and reducing crank and deformation, wherein it comprises drying bank with hot water cycle heating system; the drying bank is connected to vacuum system and condense water catcher; the drying bank contains anode and cathode for outputting electromagnetic wave power. Compared with present technique, when drying matter, the aluminum plate hot water inner circuit transmits heat to the matter, while part of its vaporized steam via vacuum pump is discharged outside the tank, and another part via condensing water catcher is discharged, then to be heated via high-frequency electromagnetic wave, to polarize the inner water molecule of matter, to quickly dry without damage.

Description

Drying machine

Technical field

The present invention relates to a kind of drying equipment, particularly a kind of dehumidification equipment to bamboo and wood, agricultural byproducts, paper, the non-conductive object of leather-like.

Background technology

The drying equipment of prior art adopts boiler to supply with steam, resistance heated, quartz ampoule thermal source, heat pump or directly burns thermals source such as bavin, burning coal and affacts object to be dried, make heat energy arrive interior of articles by the heat transmission, gradually whole object moisture is outwards evaporated.Aforesaid way all be with heat after the object external heat to interior of articles transmission or conduction, often body surface moisture evaporation earlier causes top layer contraction distortion, cracking like this, and is particularly serious to the wood type object.Some equipment has increased regular water spray steam unit for this reason, in order to humidification object to be dried surface, and progressively heat up in time of tens of days and progressively cooling reaching, however, because the body surface drying is faster than inside, still very serious as if the object moisture content being controlled to dry and cracked problem on deformation below 8%, and reach drying time more than 25～35 days.Behind the joint product gummed of bamboo and wood and other material, as the rectangular floor of wide specification, large format decoration composite plate, owing to be that two or more not same sex materials are compound, can occur bending and deformation when dry, material have to be shortened, changed narrow or static pressure, cause waste and shorten narrow meeting, static pressure can only solve the problem of part distortion, and the time needs 2 months to half a year.For this reason, Chinese patent application CN90210434.9, disclose a kind of Wood Vacuum Drying Plant, be provided with plenum chamber and flue at the hothouse two ends, the combustion chamber is located at the bottom of hothouse, the left side central portion of hothouse is equipped with axial flow blower, hot blast directly heats on timber, for ventilating, needs the parting bead advance expenditure of every layer in timber, need to stop heating after heating a period of time and vacuumize, so efficient is low.Chinese patent application CN02289168.4 discloses a kind of vacuum drier structure, adopts the heating of confined chamber hot water circuit, still belongs to from showing interior mode of heating, and the inequality of being heated inside and outside the object is so distortion, dry and crack problems still can not effectively solve.

Summary of the invention

The purpose of this invention is to provide a kind of drying machine, the technical problem that solve is to improve rate of drying, effectively reduce the dry and cracked distortion of object to be dried in the dry run.

The present invention adopts following technical scheme: design, make a kind of drying machine, comprise drying box and be arranged on the interior hot water circuit heating system of this drying box, and vacuum system that is connected with described drying box and condensation water capturing installation, especially, also comprise frequency electromagnetic waves power generator and the positive plate that is arranged on described drying box middle part; Described hot water circuit heating system comprises the hollow heat conduction aluminium sheet that is stratified and set in the described drying box, is separately positioned on branch overflow pipe, high-pressure rubber hose, heat-exchanger pump, hot-water boiler and the cooling water tank of each layer heat conduction aluminium sheet both sides, and is arranged on drying box outer the 17 valve, the 18 valve, the 19 valve, the 20 valve, the 28 valve and the 29 valve; Described two branch overflow pipes are connected with this heat conduction aluminium sheet by being arranged on each layer heat conduction aluminium sheet two ends high-pressure rubber hose separately respectively; Described heat conduction aluminium sheet insulate to casing; Branch overflow pipe one end that is arranged on each layer heat conduction aluminium sheet one side connects the 28 valve, and the other end connects described cooling water tank and hot-water boiler respectively through the 18 valve; Branch overflow pipe one end that is arranged on each layer heat conduction aluminium sheet opposite side connects the 29 valve, and the other end is connected with described heat-exchanger pump through the 20 valve; Described heat-exchanger pump is connected with hot-water boiler by the 17 valve, and this heat-exchanger pump also is connected with cooling water tank by the 19 valve, thereby described hot-water boiler is connected with cooling water tank with the 19 valve by the 17 valve; Described condensation water capturing installation comprises catches aquaporin, evaporimeter, expansion valve, compressor, transition water tank, the 8th valve and the 9th valve; Described transition water tank is arranged on the position that is lower than described drying box bottom, and is connected with this drying box by the 9th valve; Described aquaporin one end of catching is connected with drying box, and other end order is connected with the transition water tank with the 8th valve through evaporimeter; Described evaporimeter is connected with compressor by expansion valve; Described vacuum system is connected with drying box by catching aquaporin, finishes the operation to vacuumizing in the drying box.The anode of described frequency electromagnetic waves power generator is electrically connected with positive plate by introducing the utmost point, and the negative electrode of this frequency electromagnetic waves power generator connects drying box, and described drying box is electrically connected with the heat conduction aluminium sheet of top layer and bottom respectively by stube cable.

Further, the one deck at each heat conduction aluminium sheet middle part electrically contacts in described positive plate and the drying box.

Described vacuum system comprises booster pump, roughing pump, the tenth valve, the 11 valve and dry-air blast muffler; Described booster pump bleeding point connects catches aquaporin, and the exhaust outlet of this booster pump connects described roughing pump through the 11 valve, and the exhaust outlet of described booster pump also is connected drying box through the tenth valve with the dry-air blast muffler in proper order.Described booster pump is a lobe pump; Described roughing pump is a water-ring vacuum pump.

Described drying machine also comprises at least one electric field balance metallic plate, and described each electric field balance metallic plate is stratified and set in the drying box at interval, is used to make the Electric Field Distribution in the described drying box more even.

The present invention compared with prior art, be provided with the hot water circuit heating system in the drying box, the anode and the negative electrode of electromagnetic wave power output, drying box is connected with vacuum system and condensation water capturing installation, promptly object to be dried is carried out drying by hydro-thermal thermal source and two kinds of thermals source of electromagnetic field thermal source, early stage is by circulation conduction heat drying object in the aluminium sheet hot water in the drying box, the water vapour part of its evaporation is pumped to outside the case by the vavuum pump unit, another part is condensed into water by condensation water vessel device with steam and discharges, later stage is heated by frequency electromagnetic waves, thereby the whole from inside to outside heating of interior of articles hydrone dielectric polorization is reached the damaged drying objects purpose of quick nothing.

Description of drawings

Fig. 1 is the structural representation of drying machine embodiment of the present invention.

Fig. 2 is the hot schematic diagram of frequency electromagnetic waves added-time of drying machine embodiment of the present invention.

Schematic diagram when Fig. 3 is the two thermals source heating of drying machine embodiment of the present invention.

The specific embodiment

Below in conjunction with drawings and Examples the present invention is described in further detail.As shown in Figure 1, drying machine of the present invention has the drying box 30 of placing the thing 34 that is dried, is provided with the hot water circuit heating system in it, and drying box 30 is connected with condensation water capturing installation and vacuum system.

The hot water circuit heating system comprises the multilayered thermally-conductive aluminium sheet 25 that is arranged in the drying box 30, heat conduction aluminium sheet 25 is the hollow aluminium sheet, one end of each layer heat conduction aluminium sheet 25 is connected with hot-water boiler 23 with cooling water tank 22 through high-pressure rubber hose 24, branch overflow pipe the 27, the 18 valve 18 that is connected with high-

pressure rubber hose

24,30 insulation of 25 pairs of casings of described heat conduction aluminium sheet; The other end of each layer heat conduction aluminium sheet 25 is connected with hot-water boiler 23 through the 20th valve 20, heat-exchanger pump the 21, the 17 valve 17.Cooling water tank 22 is connected with hot-water boiler 23 through the 19 valve 19.

The evaporimeter 2 of condensation water capturing installation is arranged on catches in the aquaporin 1, catches aquaporin 1 and is connected with drying box 30, and evaporimeter 2 is connected with compressor by expansion valve 3.The water-ring vacuum pump 7 of vacuum system connects drying box 30 through the 11 valve 11, a tunnel through the tenth valve 10, and another road connects through lobe pump 6 and catches aquaporin 1.

Central authorities in drying box 30 are provided with the positive plate 33 of electromagnetic wave power output, be electrically connected by the introducing electrode 16 that passes drying box 30, the heat conduction aluminium sheet 25 that the one deck at drying box 30 middle parts and positive plate electrically contact also as anode, is introduced electrode 16 outer ends and is connected with electromagnetic wave generator 35 outputs that are arranged on drying box 30 respectively with drying box 30 housings when adopting frequency electromagnetic waves as heating source; Drying box 30 tops are provided with the metallic plate 26 of balance electric field when using 35 heating of electromagnetic wave power generator.

Outside drying box 30, be lower than its bottom and be provided with transition water tank 13, transition water tank 13 is connected with drying box 30 bottoms through the 9th valve 9, and the aquaporin 1 of catching of evaporimeter 2 bottoms is connected with transition water tank 13 through the 8th valve 8.

Drying machine of the present invention, 2.2 * 2.2 * 6 meters of drying box 30 inside dimensions, heat conduction aluminium sheet 25 has 10～20 layers, hot-water boiler 23 adopts 0.1 ton of water heater, electromagnetic wave generator 35 adopts power 40KW, the high-frequency electromagnetic wave producer that the load characteristic of frequency 2～20 megahertzes is adjustable, 2～6 of metallic plates being furnished with the balance electric field action, the refrigerating capacity 7.5KW of condensation water capturing installation, drying box 30 tops have the steam of 20 cm diameters and catch mouth and connecting pipe, water ring pump 7 adopts per hour 2 cubes of recirculated waters of 250W, and lobe pump 6 adopts 1.1KW speed of exhaust 70L/S.

During desiccated wood, moist object to be dried 34 in early days the stage by heat conduction aluminium sheet 25 heating of hot water circuit heating system, hot water burns waste material hot-water boiler 23 by the outside to be provided, provide to reduce drying cost with heat-exchanger pump 21, the dry middle and later periods also is the process of easy dry and cracked distortion of timber, stop heat-exchanger pump 21 during this, shut off

valve

18,20,

open discharging valve

28,29 flow out the water in branch overflow pipe 27 and the high-

pressure rubber hose

24,30 insulation of 25 pairs of drying box of heat conduction aluminium sheet, start high-frequency electromagnetic wave producer 35 then, its output is received positive plate 33 by introducing the utmost point 16, negative electrode is connected top layer by drying box 30 and stube cable 32 on it and 25 pairs of objects to be dried of bottom aluminium sheet, 34 integral body heat, object to be dried 34 is equivalent to the load of frequency electromagnetic waves power generator 35, the object hydrone is polarized under high-power alternating electromagnetism field action, friction absorbs electric field energy and converts the heat energy that self heats to, make the whole from inside to outside heating of object to be dried 34, moisture is outwards evaporation constantly, the moisture of these dry object 34 inside transmits to the surface and makes surperficial moisture content all the time a little more than inside simultaneously, has effectively prevented this dry object 34 surperficial dry and cracked contraction distortions.

In whole dry run, the water vapour that object to be dried 34 heatings produce evaporates outside this object to be dried 34, part box body wall around drying box 30 is condensed into water and flows into transition water tank 13, another part is by

vavuum pump

6,7 suction evaporimeters 2, part water condensation in the water vapour is entered transition water tank 13, and vent the air overboard, when vacuumizing, shut off valve 31, vacuum reaches 4000-10000Pa final vacuum pump and quits work, and vacuum is reduced to the setting value final vacuum pump gas clean-up of starting working in drying box.

Adopt booster pump 6 when vacuum is in saturated vapor in setting range, in the drying box 30 when denseer, open the tenth valve 10, close 11 valves 11, with case in steam suck evaporimeter 2, the evaporator surface temperature is higher than the frosting temperature, guaranteed the evaporimeter frost-free, enter circulation in the drying box 30 through condensed dry air again by dry-air blast muffler 14, thereby reach the purpose of dry object to be dried 34.But valve-off 8,9 is opened valve 12 and is discharged water not influence the vacuum in the drying box 30 after transition water tank 13 water are full.

When the aridity of object to be dried 34 has reached required value, stop to heat and object being lowered the temperature, shut off

valve

17,28,29 was opened

valve

18,19,20 heat-exchanger pumps 21 hot water in the heat conduction aluminium sheet 25 was squeezed into cooling water tank 22 circulation this moment, internal heat was discharged outside up to temperature then dry end that meet the requirements under the fan effect.

In addition, for the compound product of distortion such as the joint product of bamboo and wood and other material, the rectangular composite floor board of wide specification, the large format decoration composite plate etc. of causing of different materials, because dissymmetrical structure and moisture content difference, can produce flexural deformation unavoidably aborning, by behind cooling number under the high vacuum hour, getting final product complete equipilibrium after vacuum frequency electromagnetic waves heating a period of time dehumidifier.

2-30 megahertz electromagnetic wave is low-frequency range in radio frequency, again because of in the vacuum tank of steel plate sealing, working, compared with the microwave of nearly gigahertz to human body safety, surpass microwave because wavelength is long, frequency is low, penetrate thick object ability, the volume of object to be dried 34 size stacked require lowly, practical operation is easy.

Hydro-thermal heating source and electromagnetic wave heating source among the present invention all can use separately, object can be placed at the agricultural product that dry chrysanthemum, vegetables, potato chips class are not easy to stacking and use separately on the heat conduction aluminium sheet that loop heating system, vacuum system and condensation water capturing installation carry out vacuum drying in the hot water.If can stacking heating and with the conventional drying breakage rate high as high-grade ply, leather, paper buttress etc. then two thermal source drying modes that can adopt 25 heating of heat conduction aluminium sheet and frequency electromagnetic waves to heat not only reduce cost but also improve speed and quality.

As shown in Figure 2, when heating with frequency electromagnetic waves separately, heat conduction aluminium sheet 25 can be received and hang over the top and also can split out and be placed on outside the case.When heating with frequency electromagnetic waves separately, because object to be dried 34 density and moisture and inconsistent, Electric Field Distribution inequality when stacking is blocked up, object absorbs the electromagnetic wave energy difference, and object moisture content difference is bigger behind dry the end, so adopted electric field balance metallic plate 26 among the present invention.Electric field balance metallic plate 26 is not directly received the frequency electromagnetic waves male or female, adds one deck every certain thickness, effectively balance electric field.The out-put supply of frequency electromagnetic waves power generator 35 connects positive plate 33 by introducing electrode 16, negative electrode utilizes drying box 30, under the frequency electromagnetic waves effect,, be issued to the damaged drying objects purpose of quick nothing at vacuum condition with the whole from inside to outside heating of interior of articles hydrone dielectric polorization.Because the effect of electric field balance metallic plate 26 makes dry back object moisture content consistent more.

As shown in Figure 3, when adopting the two thermals source heating of the present invention, object to be dried 34 in early days the stage burn heat conduction aluminium sheet 25 heating that waste material hot-water boiler 23 usefulness heat-exchanger pumps 21 provide the hot water circuit heating system by the outside, with the reduction drying cost.The dry middle and later periods is the process of easy dry and cracked distortion of timber, stop heat-exchanger pump 21 during this, shut off

valve

18,20,

open discharging valve

28,29 and make water outflow in branch overflow pipe 27 and the high-pressure rubber hose 24, start frequency electromagnetic waves merit generator 35 then, its output is received positive plate 33 by introducing the utmost point 16, and negative electrode is connected top layer and the 34 whole heating of 25 pairs of objects to be dried of bottom heat conduction aluminium sheet by drying box with stube cable 32.Object to be dried 34 is equivalent to the load of frequency electromagnetic waves power generator 35, polarized, the friction of object hydrone absorbs the heat energy that electric field energy converts self heating under the alternating electromagnetism field action, the whole from inside to outside heating of object to be dried 34, moisture is outwards evaporation constantly, and inner simultaneously moisture content transmits to the surface and makes the moisture content on surface prevent surperficial dry and cracked contraction distortion a little more than inside all the time.

Claims

1. a drying machine comprises drying box (30) and is arranged on the interior hot water circuit heating system of this drying box (30), and the vacuum system and the condensation water capturing installation that are connected with described drying box (30); It is characterized in that:

Also comprise frequency electromagnetic waves power generator (35) and be arranged on the positive plate (33) at described drying box (30) middle part; Described hot water circuit heating system comprises hollow heat conduction aluminium sheet (25), the branch overflow pipe (27) that is separately positioned on each layer heat conduction aluminium sheet (25) both sides, high-pressure rubber hose (24), heat-exchanger pump (21), hot-water boiler (23) and the cooling water tank (22) that is stratified and set in the described drying box (30), and is arranged on drying box (30) outer the 17 valve (17), the 18 valve (18), the 19 valve (19), the 20 valve (20), the 28 Draw off valve (28) and the 29 Draw off valve (29); Two described minute overflow pipe (27) be connected with this heat conduction aluminium sheet (25) by being arranged on each layer heat conduction aluminium sheet (25) two ends high-pressure rubber hose (24) separately respectively; Described heat conduction aluminium sheet (25) insulate to drying box (30); Branch overflow pipe (27) one ends that are arranged on each layer heat conduction aluminium sheet (25) one sides connect the 28 Draw off valve (28), and the other end connects described cooling water tank (22) and hot-water boiler (23) respectively through the 18 valve (18); Branch overflow pipe (27) one ends that are arranged on each layer heat conduction aluminium sheet (25) opposite side connect the 29 Draw off valve (29), and the other end is connected with described heat-exchanger pump (21) through the 20 valve (20); Described heat-exchanger pump (21) is connected with hot-water boiler (23) by the 17 valve (17), this heat-exchanger pump (21) also is connected with cooling water tank (22) by the 19 valve (19), thereby described hot-water boiler (23) is connected with cooling water tank (22) with the 19 valve (19) by the 17 valve (17);

Described condensation water capturing installation comprises catches aquaporin (1), evaporimeter (2), expansion valve (3), compressor, transition water tank (13), the 8th valve (8) and the 9th valve (9); Described transition water tank (13) is arranged on the position that is lower than described drying box (30) bottom, and is connected with this drying box (30) by the 9th valve (9); Described aquaporin (1) one end of catching is connected with drying box (30), and other end order is connected with transition water tank (13) with the 8th valve (8) through evaporimeter (2); Described evaporimeter (2) is connected with compressor by expansion valve (3);

Described vacuum system is connected with drying box (30) by catching aquaporin (1), finishes the operation that vacuumizes in the drying box (30);

The anode of described frequency electromagnetic waves power generator (35) is electrically connected with positive plate (33) by introducing the utmost point (16), the negative electrode of this frequency electromagnetic waves power generator (35) connects drying box (30), and described drying box (30) is electrically connected with the heat conduction aluminium sheet (25) of top layer and bottom respectively by stube cable (32).

2. drying machine according to claim 1 is characterized in that:

Described positive plate (33) electrically contacts with the one deck at interior each heat conduction aluminium sheet (25) middle part of described drying box (30).

3. according to claim 1 or 2 described drying machines, it is characterized in that:

Described vacuum system comprises booster pump (6), roughing pump (7), the tenth valve (10), the 11 valve (11) and dry-air blast muffler (14); Described booster pump (6) bleeding point connects catches aquaporin (1), the exhaust outlet of this booster pump (6) connects described roughing pump (7) through the 11 valve (11), and the exhaust outlet of described booster pump (6) also is connected drying box (30) through the tenth valve (10) with described dry-air blast muffler (14) in proper order.

4. drying machine according to claim 3 is characterized in that:

Described booster pump (6) is a lobe pump; Described roughing pump (7) is a water-ring vacuum pump.

5. drying machine according to claim 1 is characterized in that:

Also comprise at least one electric field balance metallic plate (26), described each electric field balance metallic plate (26) is stratified and set in the described drying box (30) at interval.