CN1098351A - The fiberboard wet production line transform the dry medium density fibreboard process line method as - Google Patents
The fiberboard wet production line transform the dry medium density fibreboard process line method as Download PDFInfo
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- CN1098351A CN1098351A CN 94103625 CN94103625A CN1098351A CN 1098351 A CN1098351 A CN 1098351A CN 94103625 CN94103625 CN 94103625 CN 94103625 A CN94103625 A CN 94103625A CN 1098351 A CN1098351 A CN 1098351A
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Abstract
The fiberboard wet production line transform the method that dry process production line enables to produce the glue medium density fibre board (MDF) as.This method keeps and the most equipment that utilize former wet pressed hardboard production line, cancel decompression diluter, stock tank, stock pump, refiner, the continuous size vat of former wet processing, set up pneumatic conveying drying unit, spraying colloid system, dried fiber feed bin and blast system.Both can produce the high-grade glue medium density fibre board (MDF) that has, can thoroughly solve the serious waste water pollution problem that wet processing exists again, and investment in technological upgrading saved extremely.
Description
The present invention relates to a kind ofly, enable to produce the commercial run of glue medium density fibre board (MDF) with the existing wet pressed hardboard production line of dry process transformation.
The hardboard producer that domestic existing more than 400 families adopt conventional wet technology.Because its product specification is low, purposes is wideless, and energy consumption is higher, and water consumption and waste discharge amount are too big, and environmental pollution is serious.Therefore, many wet pressed hardboards enterprise is absorbed in a dilemma predicament, and some enterprise has been in half end-of-life state that stops production.In recent years, numerous and confused certain manpower and financial resources, the technological transformation of exploration on the wet pressed hardboard production line, the feasibility of the wet method of changing the line of production medium density fibre board (MDF) of dropping into of some institution of higher learning, scientific research institutions, equipment manufacturing and fiberboard enterprise.Though these have improved the class and the performance of enterprises of product to a certain extent, but still be confined in " controlling wet to wet " scope, can not thoroughly get rid of waste water pollution problem, and owing to executed phenol glue in the wet pulp, number of dropouts is bigger, waste water has been produced new pollution, increased the difficulty of waste water treatment, situation that can not the moderate water resource scarcity.
The objective of the invention is for a kind of wet pressed hardboard improvement of manufacturing line is provided is that dry method has glue medium density fibre board (MDF) process line method, it both can make full use of the equipment of former wet pressed hardboard production line, after carrying out the local techniques transformation, produce high-grade medium density fibre board (MDF), can thoroughly solve the serious waste water pollution problem that exists in the wet processing again, for an outlet that makes the best of both worlds is sought by the wet-process fiber board factory of numerous domestic.
Commercial run of the present invention is the most equipment that keep former wet pressed hardboard production line, reduce investment in technological upgrading, cancel the decompression diluter of former wet method fibreboard production line, stock tank and refiner, set up a pneumatic conveying drying unit, make in the former wet processing fiber that gushes out from defibrator without the thin up of decompression diluter become slurries and directly with enter the pneumatic drier group after sizing material (urea-formaldehyde glue or phenol glue) mixes and carry out fiber drying, the fiber moisture that drying finishes is 5～15%, and enter dried fiber feed bin, thereby realize that wet processing changes a step of most critical to dry process.The dried fiber of having executed glue is after the paving prefabricating machine is made slab, and hot pressing in temperature is lower than 170 ℃ hot press makes adhesive solidification, and making dry method has the glue medium density fibre board (MDF).
Below in conjunction with accompanying drawing technical process of the present invention is elaborated.
Fig. 1 is wet pressed hardboard technological process of production figure before transforming.Fig. 2 transforms back dry medium density fibreboard technological process of production figure.
According to method of the present invention, with reference to Fig. 1 and Fig. 2, most operations of former wet pressed hardboard production line all can keep or utilize. These operations have: get the raw materials ready, section, feed bin, defibrator process, slab, conveying, dress plate, hot pressing, unload plate, mitre saw limit, finished product stacking. Corresponding available equipment has: raw material belt fortune Defeated machine, slicer, chip blower, wood chip cyclone separator, vibratory sieve, chip bin, defibrator, fourdrinier machine, synchronous transporter, slab mitre saw, acceleration transporter, fast transportation machine, plywood transporter, caul circulating system unit, charging crane, hot press, finished product edging and trimming saw, dry plate transporter and finished product piler etc. all can keep use.
According to method of the present invention, cancel decompression diluter, applying glue case, stock tank, stock pump, the refiner of former wet processing, the substitute is pneumatic conveying drying unit, spraying colloid system, dried fiber feed bin and blast system.
According to method of the present invention, the fourdrinier machine in the former wet production line is undergone technological transformation, make it to become the paving prefabricating machine that is fit to dry production.
According to method of the present invention, hot press must be set up finger gauge, journey mechanism and simultaneous close mechanism, so that the product thickness tolerance meets the GB requirement.Loader and unloader can adopt backing plate mode (device that promptly keeps former wet production line), also can adopt no backing plate mode (being synchronous belt formula or pellet type).
Method of the present invention all is suitable for the various fibrous raw materials that come from agriculture and forestry plant, no matter is woody or draft, no matter also with bar, stalk, stem, shell etc.
Adopt the technological transformation of method of the present invention to existing wet pressed hardboard production line, greatly reduce the equipment investment of dry process production line, both can thoroughly solve serious waste water pollution problem, can produce again breadth 4 ' * 8 ' or 3 ' * 7 ', thickness is the medium density fibre board (MDF) of the following all size of 35mm, improves product specification and business economic benefit.In addition, hot press pressure is increased to 3.5～5.0MPa, but also production dry method hardboard, the designs and varieties of increase product.
Below in conjunction with embodiment, the present invention is further illustrated.
The embodiment medium density fibre board (MDF)
It is raw material that present embodiment adopts timber.Wood machining residues or hill logging residue are whittled into the wood chip of 25 * 35mm earlier, spray glue mixes (resin added 10%) after defibrator (vapour pressure 0.8MPa) resolves into fiber, this moment, fiber moisture was 70%, and moisture content is 8% behind pneumatic conveying drying (170 ℃ of temperature).Dried fiber is delivered to the moulding of paving prefabricating machine, deliver to hot pressing in the hot press through plate blank conveyer again, 180 ℃ of hot pressing temperatures, pressure: 3.5MPa makes the medium density fibre board (MDF) of 2440 * 1220 * 15mm.Its properties of product are as follows:
Density: 0.7kg/dm
3Moisture content: 3.0%
MOR: 34MPa plane tensile strength: 0.55MPa
Elastic modelling quantity: 3300MPa cold water soaks 24 hours thickness swellings: 11%
Claims (6)
1, a kind of commercial run that enables to produce the glue medium density fibre board (MDF) with the existing wet pressed hardboard production line of dry process transformation, it is characterized in that keeping and the most equipment that utilize existing wet pressed hardboard production line, cancel decompression diluter, stock tank, stock pump, refiner, the continuous size vat of former wet processing, set up pneumatic conveying drying unit, spraying colloid system, dried fiber feed bin and blast system.
2, in accordance with the method for claim 1, its step comprises:
(a) adopt earlier drying process behind the spray glue, make from the fiber of defibrator ejection with enter the pneumatic drier group after adhesive evenly mixes and carry out drying;
(b) fiber that finishes of drying is delivered to dried fiber feed bin, uses for next process paving prefabricating machine;
(c) dried fiber forms slab through sedimentation in the shaping box of spreading machine, and sends into hot press after precompressed;
(d) slab adhesive solidification after hot pressing has been made the glue medium density fibre board (MDF).
3, in accordance with the method for claim 1, its Fibreboard Production raw material comprises herbaceous plant and xylophyta and their bar, stalk, stem, shell.
4, in accordance with the method for claim 1, its paving prefabricating machine is to utilize the fourdrinier machine transformation of existing wet production line to form.
5, in accordance with the method for claim 1, its hot press is furnished with finger gauge, decides journey mechanism and simultaneous close mechanism.
6, in accordance with the method for claim 1, the product of producing when slab is accepted the pressure of 3.5～5.5MPa in hot press is a hardboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94103625A CN1035311C (en) | 1994-04-05 | 1994-04-05 | Method for transforming fibreboard wet production line into dry medium-density fibreboard production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94103625A CN1035311C (en) | 1994-04-05 | 1994-04-05 | Method for transforming fibreboard wet production line into dry medium-density fibreboard production line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1098351A true CN1098351A (en) | 1995-02-08 |
| CN1035311C CN1035311C (en) | 1997-07-02 |
Family
ID=5031171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94103625A Expired - Fee Related CN1035311C (en) | 1994-04-05 | 1994-04-05 | Method for transforming fibreboard wet production line into dry medium-density fibreboard production line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1035311C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102229158A (en) * | 2011-06-03 | 2011-11-02 | 冯水木 | Anaglyptic wooden board and manufacturing method thereof |
| CN102672785A (en) * | 2012-05-22 | 2012-09-19 | 文安县天华密度板有限公司 | Method for preparing multifunctional environment-friendly artificial board by fumigating vegetable fiber with ozone |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1008252B (en) * | 1985-08-06 | 1990-06-06 | 沈国镇 | Process for making composite from lignocellulosic materials |
| CN1067399A (en) * | 1991-06-05 | 1992-12-30 | 蛇口招商无胶人造板新技术有限公司 | Lignocellulosic materials is made glue-free artificial board's commercial run and equipment |
-
1994
- 1994-04-05 CN CN94103625A patent/CN1035311C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102229158A (en) * | 2011-06-03 | 2011-11-02 | 冯水木 | Anaglyptic wooden board and manufacturing method thereof |
| CN102672785A (en) * | 2012-05-22 | 2012-09-19 | 文安县天华密度板有限公司 | Method for preparing multifunctional environment-friendly artificial board by fumigating vegetable fiber with ozone |
| CN102672785B (en) * | 2012-05-22 | 2014-10-01 | 文安县天华密度板有限公司 | Method for preparing multifunctional environment-friendly artificial board by fumigating vegetable fiber with ozone |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1035311C (en) | 1997-07-02 |
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