CN105484107A

CN105484107A - Drying process of super-thick insulating pressboard

Info

Publication number: CN105484107A
Application number: CN201510801169.1A
Authority: CN
Inventors: 闾传胪
Original assignee: NANTONG ZHONGLING INSULATION MATERIALS Co Ltd
Current assignee: NANTONG ZHONGLING INSULATION MATERIALS Co Ltd
Priority date: 2015-11-18
Filing date: 2015-11-18
Publication date: 2016-04-13

Abstract

The present invention belongs to a drying process of a super-thick insulating pressboard. The process comprises the steps of: preparing 0.5-0.7% pulp by insulating wood pulp through conventional processing to enter a pulp stabilization box; sending the pulp into a wet raw paper shaper via a pulp pump; sending the prepared wet raw paper into a die with an inner net sleeved; sending the wet raw paper into a pressurizer together with the die for water extrusion, the pressure being 0.7-0.9 Mpa; pumping water by assistance of a vacuum pump; taking out the wet raw paper when water content reaching 40-50%; sending the wet raw paper into a microwave drying box through a conveyer belt for drying until the water content reaching 25-35%; pulling out the raw paper into a hot press for drying until the water content of the pressboard reaching 4-6%, the temperature being 115-125 DEG C and the drying time being determined by thickness; unlading the pressboard and sending the pressboard into a semi-finished product chamber with balance processing for 3-5 days; trimming and finishing; and packing the pressboard after the pressboard is inspected and qualified and putting the pressboard in storage.

Description

The drying process of ultrathick insulating paperboard

Technical field

The present invention relates to the drying process of ultrathick insulating paperboard, belong to paper technology and transformer insulating materials manufactures field.

Background technology

Ultrathick insulating paperboard mainly displacement thickness >=12mm laminated cardboard be used for transformer do insulation fabric part.Current transformer is all process with paperboard bonding, drying for making the laminated cardboard of insulation fabric part, this processing method is complicated, production efficiency is low, cardboard easily produces secondary pollution in transport, keeping, process, affect withstand voltage properties, ultrathick insulating paperboard quality and applicability are better than laminated cardboard and lamination wood.

Summary of the invention

The object of this invention is to provide the drying process of disposal molding ultrathick insulating paperboard.

The present invention is achieved in that high chemical pure insulation pulps through preliminary treatment, carry out pulping, be concentrated into stock tank, with pump, paper pulp is delivered to fiberizer and wears into beating 30 ± 2 ° of SR meeting technological requirement, the slurry of weight in wet base 13 ± 2g, the slurry of milled is made into the concentration of 0.6 ± 0.1%, after low dense high efficiency slag remover removing impurity, enter slurry-stablizing case, again by pipeline and pump, paper pulp is sent into l Water Paper base former, making certain thickness l Water Paper base sends in the mould of surrounding and bottom belt mesh, mould is built with Intranet, when paper thinkness reaches setting thickness, one deck screen cloth is covered again above ground paper, then the mould installing ground paper is sent into pressuring machine, grinding tool outer wall connects vavuum pump, top pressurization while opening vavuum pump suction paper pulp moisture, pressuring machine operating pressure 0.8 ± 0.1MPa, pressing time is depending on the thickness of ground paper, when ground paper moisture reaches 40-50%, ground paper is taken out from mould together with Intranet, send into large-scale microwave oven dry, when to be dried to moisture of paper board be 30 ± 5%, again ground paper is taken out and deliver to hot press continuation drying, baking temperature is 120 ± 5 DEG C, hot pressing time apparent thickness and moisture and determine, until cardboard reaches moisture standards required value, release, 2-5 days Balance Treatment in the semifinished product warehouse of taking-up cardboard placement freeze-day with constant temperature, trimming ornamenting again, packaging and warehousing.

Advantage of the present invention:

1, one-shot forming, reduces processing link, reduces secondary pollution, economize energy and reduction labour productive forces.

2, ultrathick insulating paperboard comparatively laminated cardboard (multiple insulating boards gummed form) owing to there is no gluing thing, fiber fineness is high, with the fused process of transformer oil, intermiscibility is better, in process of osmosis, penetration power is stronger, show oil absorbency much larger than laminated cardboard, thus improve electrical insulation properties, be applicable to high voltage transformer and use.

3, ultrathick insulating paperboard is due to fiber high purity, less than laminated cardboard dielectric loss, can improve the quality safety assurance coefficient of transformer.

4, ultrathick insulating paperboard is Creative product, and technology difficulty is large, with high content of technology, can bring economic benefit and brand benefit to enterprise.

Accompanying drawing explanation

Fig. 1 is the drying process of disposal molding ultrathick insulating paperboard

Detailed description of the invention

Embodiment 1 and 2, the parameter of embodiment 2 is the data in bracket.

By wood pulp 1 through purification preliminary treatment 2, concentrated 4 to concentration 3.5 (4.5) % of the slurry after pulper 3 size degradation enters brown stock chest 5, by stock pump 6, slurry is delivered to fiberizer 7, wears into beating degree 28 (32).SR, machine chest 8 sent to by the slurry that weight in wet base is 11 (15) grams, the slurry of milled being made into concentration is that the slurry of 0.5 (0.7) % sends into efficient low dense scummer 10 by stock pump 9 again, slurry-stablizing case 11 is entered after slagging-off, l Water Paper base former 13 is sent into again by stock pump 12, ready-made l Water Paper base 14 is sent into be packaged in the mould 15 of Intranet 16, pressuring machine 17 water squeezing is sent into together with mould, pressure is 0.7 (0.9) MPa, vavuum pump 18 auxiliary suction water, moisture takes out l Water Paper base when reaching 40 (50) %, microwave drying oven 20 is sent into dry by conveyer belt 19, be dried to moisture when 25 (35) %, it is dry that hot press 21 sent into by pull-out ground paper, temperature is 115 (125) DEG C, drying time apparent thickness and determining, be dried to cardboard moisture 4 (6) %, release 22, take out cardboard and put semi-finished product room balance 23 process 3 (5) skies into, trimming ornamenting 24 again, 25 qualified through checking, vacuum packing 26 warehouse-in 27.

Claims

1. the drying process of a ultrathick insulating paperboard, it is characterized in that: the slurry that insulation pulps is made into 0.5-0.7% through conventional treatment enters slurry-stablizing case (11), l Water Paper base former (13) is sent into again by stock pump (12), ready-made l Water Paper base (14) feeding has been packaged in the mould (15) of Intranet (16), pressuring machine (17) water squeezing is sent into together with mould, pressure is 0.7-0.9MPa, start vavuum pump (18) auxiliary suction water, moisture takes out l Water Paper base when reaching 40-50%, microwave drying oven (20) is sent into dry by conveyer belt (19), be dried to moisture when 25-35%, it is dry that hot press (21) sent into by pull-out ground paper, temperature is 115-125 DEG C, be dried to cardboard moisture 4-6%, release (22), take out cardboard and put semi-finished product room balance (23) process 3-5 days into, trimming ornamenting again (24), through inspection (25) packing (26) warehouse-in (27).