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Electric heating vacuum drying process for poplar fiber bricks

A poplar fiber, vacuum drying technology, used in manufacturing tools, ceramic molding machines, etc., can solve the problems of low efficiency and long drying time, and achieve the effect of improving drying speed, improving drying efficiency and good touch.

Inactive Publication Date: 2018-11-27
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology generally adopts natural drying and hot air drying, the drying time is long and the efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0024] (1) Purpose: to dry wet bricks whose three-dimensional size is 235mm×110mm×50mm, so that the moisture content of the dried bricks can reach 14.15%~36.65%.

[0025] (2) Accurately weigh poplar fiber and calcium hydroxide with a mass ratio of 1.0:6.0; after the mixture is fully stirred, wet bricks with a three-dimensional size of 235mm×110mm×50mm are pressed on a cold press.

[0026] (3) After the cold pressing is finished, demould at 25°C.

[0027] (4) Weigh the weight of the wet brick on the balance, 2024g.

[0028] (5) Dry the bricks in an electric vacuum air drying environment at 170°C.

[0029] (6) When drying for 0.5h, weigh the brick on a balance, and the weight is 1827g.

[0030] (7) Bricks are baked to absolute dryness in a hot air drying oven, and the moisture content of the bricks is 30.59%. .

[0031] (8) Determine the drying process. The molded bricks of poplar wood and calcium hydroxide are dried for 0.5h in a vacuum drying environment with a vacuum degr...

specific Embodiment 2

[0032] (1) Purpose: to dry wet bricks whose three-dimensional size is 235mm×110mm×50mm, so that the moisture content of the dried bricks can reach 14.15%~36.65%.

[0033] (2) Accurately weigh poplar fiber and calcium hydroxide with a mass ratio of 1.0:6.0; after the mixture is fully stirred, wet bricks with a three-dimensional size of 235mm×110mm×50mm are pressed on a cold press.

[0034] (3) After the cold pressing is finished, demould at 25°C.

[0035] (4) Weigh the weight of the wet brick on the balance, 2014g.

[0036] (5) Dry the bricks in an electric vacuum air drying environment at 170°C.

[0037] (6) When drying for 1.0h, weigh the brick on a balance, and the weight is 1738g.

[0038] (7) Bricks are baked to absolute dryness in a hot air drying oven, and the moisture content of the bricks is 34.31%. .

[0039](8) Determine the drying process. The molded bricks of poplar wood and calcium hydroxide are dried for 1.0 h in a vacuum drying environment with a vacuum degr...

specific Embodiment 3

[0040] (1) Purpose: to dry wet bricks whose three-dimensional size is 235mm×110mm×50mm, so that the moisture content of the dried bricks can reach 14.15%~36.65%.

[0041] (2) Accurately weigh poplar fiber and calcium hydroxide with a mass ratio of 1.0:6.0; after the mixture is fully stirred, wet bricks with a three-dimensional size of 235mm×110mm×50mm are pressed on a cold press.

[0042] (3) After the cold pressing is finished, demould at 25°C.

[0043] (4) Weigh the weight of the wet brick on the balance, 2001g.

[0044] (5) Dry the bricks in an electric vacuum air drying environment at 170°C.

[0045] (6) When drying for 1.5 hours, weigh the brick on a balance, and the weight is 1674g.

[0046] (7) Bricks are baked to absolute dryness in a hot air drying oven, and the moisture content of the bricks is 27.10%.

[0047] (8) Determine the drying process. Bricks molded with poplar wood and calcium hydroxide are dried for 1.5 hours in a vacuum drying environment with a vacuu...

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Abstract

The invention relates to an electric heating vacuum drying process for poplar fiber bricks. Poplars and calcium hydroxide are briquetted into wet bricks on a cold pressing machine, and demoulding is conducted after cold pressing is finished; drying is conducted for 0.5-3.0 h in an environment of which the vacuum degree is 0.06-0.08 MPa and the temperature is 170 DEG C. By means of the method, themould-pressing bricks are subjected to vacuum drying, and the moisture content of the dried bricks reaches 14.15%-36.65%. Compared with the methods of natural drying and hot air drying in the prior art, the electric heating vacuum drying process has the advantages that on the premise that the drying condition guarantees the drying quality, the drying efficiency is improved, and the drying speed isincreased; the dried bricks can be directly used as light wall brick materials, and are similar to light wood, and good in touch feeling, warm feeling and decorativeness; a built wall has good heat preservation, heat insulation, energy conservation, sound insulation and sound absorption; through the porous structure, the bricks have the desorbing and moisture absorption effects, thus the functionof adjusting the indoor air humidity is achieved, the indoor environment quality is improved, and the livability of houses is improved.

Description

technical field [0001] The invention belongs to the technical field of drying technology, and in particular relates to an electrothermal vacuum drying technology for poplar fiber bricks. Background technique [0002] The area of ​​poplar plantations in my country is more than 10.1 million hm 2 , with a storage capacity of 549 million m 3 , with the world's first, rich poplar resources. At present, poplar is mainly used to make wood-based panels, the processing method is single, the added value is low, and the profit rate is 7.5%. [0003] In order to increase the added value of poplar wood, it is an effective way to mold light weight wall brick materials with poplar wood fiber. The new bricks are similar to light wood, with good touch, warmth and decoration; the wall made of masonry has good thermal insulation, heat insulation, energy saving, sound insulation and sound absorption performance, and the porous structure makes it desorb and absorb moisture. , so as to realiz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B3/02B28B1/52B28B11/24C04B28/10
Inventor 王萌路则光董荣丹贾万达
Owner SHANDONG AGRICULTURAL UNIVERSITY
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