CN100493383C - Method and equipment for continuously drying laver sheets - Google Patents

Abstract

A method for continuously drying the laver sheet includes such steps as filtering water while forming sheet, pressing it onto drying net by applying hot air to it, and drying. Its apparatus is composed of several drying net layers. Each layer consists of annular drying net, drive roller, driven roller, supporting roller and air cover with hot air inlet tube and used air outlet tube.

Description

Laver sheets method for continuous drying and equipment

Affiliated technical field

The present invention relates to a cover laver sheets method for continuous drying and an equipment, especially can carry out drying on the net, and prevent the method and apparatus of laver sheets contraction distortion being close to do by the hot blast applied pressure through the formed even laver sheets of drainage; The invention belongs to marine alga process technology and apparatus field.

Background technology

At present, the large-scale production plant that is shaped process technology and grows up on this basis the intermittence of Japan is mainly adopted in the processing of laver sheets, be characterized on the curtain sheet, realizing being shaped and dehydration by processes such as cast off and on, drainage, extruding, the curtain sheet that will adhere to wet laver sheets then is suspended in the baking oven, finishes process through 35～80 ℃ of heated-air dryings again; In dry run, laver adheres to the surface of curtain sheet, because the curtain sheet laterally is rigidity, vertically is subjected to the stretching of warp, thereby has limited the contraction of laver sheets.This process technology equipment needed thereby investment that intermittently is shaped is huge, and separate unit output is little, and finished product uniformity instability causes the processing cost height.Adopt the progressive forming technology of papermaking, though can obtain the good laver sheets of evenness, need 30～120 minutes but laver sheets is dry, and contraction distortion stress ratio wet web is much higher, causes existing wet web dry technology and equipment can't guarantee the dry mass of laver sheets.

Summary of the invention

Huge in order to solve existing laver sheets batch processed technology equipment needed thereby investment, separate unit output is little, finished product uniformity instability, cause processing cost high and problem, the invention provides a cover laver sheets method for continuous drying and an equipment.

The technical solution adopted for the present invention to solve the technical problems is: realized the progressive forming of the laver width of cloth by rotary screen cage and forming net, and on suction box to its dehydration, under the guiding of forming net, enter the drying that realizes the laver width of cloth in the multilayer net belt type drying box then, again through cutting the acquisition laver sheets.In drying box, every layer of dry guipure by the dried net of ring-type, driven roller, driven voller and be arranged at driven roller and driven voller between table roll and gas hood constitute, the driven roller of doing net is arranged on away from rotary screen cage one end, the driven roller of the second layer has vacuum and inhales shifting function, is called to inhale to move driven roller, and the 3rd layer driven voller also has vacuum and inhales shifting function, be called to inhale and move driven voller, the 4th layer is provided with to inhale and moves driven roller, and layer 5 is provided with to inhale and moves driven voller, and so circulation causes bottom; Driven roller is with to inhale diameter, the rotating speed move driven roller identical but switched in opposite makes adjacent dried network operation speed identical.What ring-type was done net is rigidity laterally, the spacing of the adjacent dried net of each layer is slightly larger than the thickness sum of wet laver and forming net, the tensioning limit of every layer of dried net mid portion of ring-type is supported by a row of horizontal table roll that is fixed on the left-right symmetry longeron, the highest point of this row's table roll and the upper end surface of longeron are in same plane, every layer of dried net all disposes gas hood, the sealed bottom that is fixed on this layer longeron, the upper end of gas hood side plate, the sealed upper surface that is fixed on down one deck longeron, side plate lower end, the width of gas hood bottom is slightly larger than the width of doing net, the end face of gas hood end plate and this layer longeron upper end surface are in same horizontal plane, the spacing of the bottom surface of gas hood end plate and lower floor longeron upper surface is slightly larger than the thickness sum of wet laver and forming net, the gas hood dividing plate is done the net inner space with every layer of ring-type and is divided into two parts up and down, top at the gas hood side plate is furnished with air intake duct, can drain steam and part hot blast, bottom at the gas hood side plate is furnished with air inlet pipe, and dry-heat air is introduced; For no reason after forming net held rotary screen cage from wite roll, enter multilayer net belt type drying box from the gap location of dry guipure of ground floor and the dry guipure of the second layer, walk around downwards to inhale from the other end of dry guipure again and move driven roller and oppositely enter between the dry guipure of the second layer and the 3rd layer of dry guipure, and behind the drying box that continues to move ahead out, realize the closed circuit of forming net at the wite roll place, suction box is set below the forming net between rotary screen cage and drying box; The wet laver width of cloth that adopts the drainage method to form at the forming net place that is positioned at rotary screen cage top after the suction flat box dehydration, enters drying box under the guiding of forming net, do the length of the width of the net and the wet laver width of cloth greater than table roll; The hot blast of introducing from air inlet pipe the longeron upper surface and above dried net, the laver width of cloth between form self-pressure-sealed, after hot blast also is subjected to the restriction of the wet laver width of cloth in table roll top and gas hood, mainly drain from the gap at gas hood two ends, be subjected to the retardation in gap, and the swabbing action of lower floor's air intake duct, do the pressure that produces 50～300 millimeters of water between the net at the laver width of cloth and lower floor, this pressure is close to the wet laver width of cloth and is done on the net, and preventing laver width of cloth contraction distortion in the dry run, the dried net that is positioned at laver width of cloth upper surface can prevent that hot blast from dispelling laver; The other end at drying box, the laver width of cloth is subjected to the power of blowing of hot blast to do online the separation from the upper strata, under moving the effect of driven roller, suction is close to forming net again, enter drying box once more and accept the heating of hot blast with dry, the other end in drying box is blown off from forming net by hot blast then, moves in suction under the effect of driven voller, and the laver width of cloth is close to the dried net of lower floor and enters drying box again, after the mass dryness fraction of laver reaches requirement, go out drying box and slitting.

The invention has the beneficial effects as follows, but laver sheets progressive forming is adapted to production in enormous quantities with dry, easy to operate, can improve production and processing efficient, cut down finished cost, improve the economic benefit of laver culture.

Description of drawings

Fig. 1 is the principle schematic of laver sheets continuous drying equipment;

Fig. 2 is a laver sheets continuous drying equipment schematic cross section;

1. rotary screen cages among the figure, 2. suction box, 3. forming net, 4. driven voller, 5. table roll, 6. air intake duct, 7. gas hood, 8. air inlet pipe, 9. dried net is 10. inhaled and is moved driven roller, 11. driven rollers, 12. inhale and move driven voller, 13. wite rolls, 14. longerons

The specific embodiment

Below in conjunction with accompanying drawing the present invention is done detailed description further.

Realize the progressive forming of the laver width of cloth by rotary screen cage 1 and forming net 3, and on suction box 2, it is dewatered, under the guiding of forming net 3, enter the drying that realizes the laver width of cloth in the multilayer net belt type drying box then, again through cutting the acquisition laver sheets.In drying box, every layer of dry guipure by the dried net 9 of ring-type, driven roller 11, driven voller 4 and be arranged at driven roller 11 and driven voller 4 between table roll 5 constitute with gas hood 7, the driven roller 11 of dried net 9 is arranged on away from rotary screen cage 1 one ends, the driven roller of the second layer has vacuum and inhales shifting function, be called to inhale and move driven roller 10, the 3rd layer driven voller has vacuum and inhales shifting function, be called to inhale and move driven voller 12, the 4th layer is provided with suction and moves driven roller 10, layer 5 is provided with to inhale and moves driven voller 12, so is circulated to bottom; Driven roller 11 is with to inhale diameter, the rotating speed move driven roller 10 identical but switched in opposite makes adjacent dried network operation speed identical.The horizontal of the dried net 9 of ring-type is rigidity, the spacing of the adjacent dried net 9 of each layer is slightly larger than the thickness sum of wet laver and forming net 3, the tensioning limit of every layer of dried net 9 mid portion is supported by a row of horizontal table roll 5 that is fixed on the left-right symmetry longeron 14, and the highest point of this row's table roll 5 and the upper end surface of longeron 14 are in same plane; The sealed bottom that is fixed on this layer longeron 14, the upper end of gas hood 7 side plates, the sealed upper surface that is fixed on down one deck longeron 14, side plate lower end, the width of gas hood 7 bottoms is slightly larger than the width of dried net 9, the end face of gas hood 7 end plates and this layer longeron 14 upper end surfaces are in same horizontal plane, the spacing of the bottom surface of gas hood 7 end plates and lower floor's longeron 14 upper surfaces is slightly larger than the thickness sum of wet laver and forming net 3, gas hood 7 dividing plates are divided into two parts up and down with every layer of dried net 9 inner space, top at gas hood 7 side plates is furnished with air intake duct 6, can drain steam and part hot blast, bottom at gas hood 7 side plates is furnished with air inlet pipe 8, and dry-heat air is introduced; For no reason after forming net 3 held rotary screen cage 1 from wite roll 13, enter multilayer net belt type drying box from the gap location of dry guipure of ground floor and the dry guipure of the second layer, walk around to inhale from the other end of drying box again and move roller 10 and oppositely enter the drying box between the dry guipure of the second layer and the 3rd layer of dry guipure, and behind the drying box that continues to move ahead out, realize the closed circuit of forming net 3 at wite roll 13 places, suction box 2 is set below the forming net 3 between rotary screen cage 1 and drying box; The wet laver width of cloth that adopts the drainage method to form at forming net 3 places that are positioned at rotary screen cage 1 top after suction flat box 2 dehydrations, enters drying box under the guiding of forming net 3, the width of the dried net 9 and the wet laver width of cloth is greater than the length of table roll 5; The hot blast of introducing from air inlet pipe 8 longeron 14 upper surfaces and above dried net 9, the laver width of cloth between form self-pressure-sealed, after hot blast also is subjected to the restriction of the wet laver width of cloth in table roll 5 tops and gas hood 7, hot blast is mainly drained from the gap at gas hood 7 two ends, be subjected to the retardation in gap, and the swabbing action of lower floor's air intake duct 6, do the uniform pressure that produces 50～300 millimeters of water between the net at the laver width of cloth and lower floor, this pressure is close on the dried net 9 the wet laver width of cloth, and prevents laver width of cloth contraction distortion in the dry run; The dried net 9 that is positioned at laver width of cloth upper surface can prevent that hot blast from dispelling laver; The other end at drying box, the laver width of cloth is subjected to the power of blowing dried net 9 separation from the upper strata of hot blast, under moving the effect of driven roller 10, suction is close to forming net 3 again, enter drying box once more and accept the heating of hot blast with dry, the other end in drying box is blown off from forming net by hot blast then, moves in suction under the effect of driven voller 12, and the laver width of cloth is close to the dried net of lower floor and is entered drying box again, after the mass dryness fraction of laver reaches requirement, go out drying box and slitting.

Claims (6)

1, a cover laver sheets method for continuous drying, the wet laver width of cloth that adopts the drainage method to form at the forming net place that is positioned at rotary screen cage top after the suction flat box dehydration, enters drying box under the guiding of forming net, do the length of the width of the net and the wet laver width of cloth, it is characterized in that greater than table roll; The hot blast of introducing from air inlet pipe the longeron upper surface and above dried net, the laver width of cloth between form self-pressure-sealed, after hot blast also is subjected to the restriction of the wet laver width of cloth in table roll top and gas hood, hot blast is mainly drained from the gap at gas hood two ends, be subjected to the retardation in gap, and the swabbing action of lower floor's air intake duct, do the pressure that produces 50～300 millimeters of water between the net at the laver width of cloth and lower floor.

2, a cover laver sheets method for continuous drying according to claim 1, it is characterized in that: the speed of service of adjacent dry net is identical, and the dried net that is positioned at laver width of cloth upper surface can prevent that hot blast from dispelling laver.

3, one cover laver sheets continuous drying equipment, realize the progressive forming of the laver width of cloth by rotary screen cage and forming net, and on suction box to its dehydration, under the guiding of forming net, enter the drying that realizes the laver width of cloth in the multilayer net belt type drying box then, in drying box, every layer of dry guipure is by the dried net of ring-type, driven roller, driven voller, and the table roll and the gas hood that are arranged between driven roller and the driven voller constitute, it is characterized in that: the driven roller of doing net is arranged on away from rotary screen cage one end, the second layer is provided with to inhale and moves driven roller, the 3rd layer is provided with suction and moves driven voller, the 4th layer is provided with to inhale and moves driven roller, and layer 5 is provided with to inhale and moves driven voller, so is circulated to bottom.

4, a cover laver sheets continuous drying equipment according to claim 3, it is characterized in that: what ring-type was done net laterally is rigidity, the spacing of the adjacent dried net of each layer is greater than the thickness sum of wet laver and forming net, the tensioning limit of every layer of dried net mid portion of ring-type is supported by a row of horizontal table roll that is fixed on the left-right symmetry longeron, and the highest point of this row's table roll and the upper end surface of longeron are in same plane.

5, a cover laver sheets continuous drying equipment according to claim 3, it is characterized in that: the sealed bottom that is fixed on this layer longeron, the upper end of gas hood side plate, the sealed upper surface that is fixed on down one deck longeron, side plate lower end, the width of gas hood bottom is greater than the width of doing net, the end face of gas hood end plate and this layer longeron upper end surface are in same horizontal plane, the spacing of the bottom surface of gas hood end plate and lower floor longeron upper surface is greater than the thickness sum of wet laver and forming net, the gas hood dividing plate is done the net inner space with every layer of ring-type and is divided into two parts up and down, top at the gas hood side plate is furnished with air intake duct, is furnished with air inlet pipe in the bottom of gas hood side plate.

6, a cover laver sheets continuous drying equipment according to claim 3, for no reason after forming net held rotary screen cage from wite roll, it is characterized in that: enter multilayer net belt type drying box from the gap location of dry guipure of ground floor and the dry guipure of the second layer, walk around downwards to inhale from the other end of dry guipure again and move driven roller and oppositely enter between the dry guipure of the second layer and the 3rd layer of dry guipure, and behind the drying box that continues to move ahead out, realize the closed circuit of forming net at the wite roll place.

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