Steam heat treatment type drying method for whole bamboos

Abstract

The invention discloses a steam heat treatment type whole bamboo drying method. The method comprises the following steps: cooking the bamboo section perforated at the bamboo joint or bamboo wall at 100°C in a mixed solution of sodium chloride and acetic acid under normal pressure, and then neatly placing the whole bamboo section in a steam tank, using 0.14MPa to 0.25MPa Vapor pressure, temperature 110 ℃ ~ 140 ℃ for treatment. Then put the above-mentioned bamboo segments into a steam drying kiln with steam spraying function for low-temperature drying, and then perform dehumidification treatment on the drying kiln until the moisture content of the bamboo segments reaches 10%-18%. After such treatment, the drying and anti-cracking effects of the whole bamboo are better, the stability and weather resistance of the whole bamboo are improved, the strength of the whole bamboo is improved, and the service life is prolonged.

Description

technical field

[0001] The invention belongs to the field of bamboo modification methods, in particular to a steam heat treatment type whole bamboo drying method. Background technique

[0002] my country is rich in bamboo resources and is the world's largest bamboo resource country. Bamboo has the characteristics of rapid growth, short rotation period, hollow bamboo joints, strong shear resistance, good rigidity, wear resistance, and excellent physical properties. Whole bamboo refers to the bamboo stalks that have been cut down without processing or only undergoing simple processing, such as not destroying the original cross-sectional structure of the bamboo, but just cutting it into a suitable length of bamboo, which can be used for construction, industrial and agricultural production, decoration and handicraft materials. At present, the utilization of bamboo in my country is mainly recombination utilization, and there are few studies on the deep processing and utilization...

Examples

Embodiment 1

[0041] (1) Raw material preparation: Select 4-year-old fresh moso bamboo with a diameter of about 140mm, and cut the fresh moso bamboo into 1.2m bamboo segments. Using artificial methods, small holes are put on the bamboo joints of the bamboo segments. The size of the hole can be adjusted as required, and the diameter R of the hole in this embodiment is 8 mm.

[0042] (2) Cooking treatment: immerse the bamboo segments in a mixed solution of 0.8% sodium chloride and 1% acetic acid, raise the water temperature at normal pressure from the natural state to 90°C, heat up for 15 minutes, and boil for 4 hours.

[0043] (3) Steam heat treatment: place the whole bamboo section neatly in a steam tank, use a steam pressure of 0.18 Mpa, and a temperature of 116°C for a constant heat treatment of 90 minutes.

[0044] (4) Drying: Put the steam heat-treated bamboo section into a drying kiln with steam spray function for drying, which is divided into the following operation stages:

[0045]...

Embodiment 2

[0050] (1) Raw material preparation: Select 4-year-old fresh moso bamboo with a diameter of about 140mm, and cut the fresh moso bamboo into 1.2m bamboo segments. Using artificial methods, small holes are put on the bamboo joints of the bamboo segments. The size of the hole can be adjusted as required, and the diameter R of the hole is 8mm.

[0051] (2) Cooking treatment: immerse the bamboo segments in a mixed solution of 0.8% sodium chloride and 1% acetic acid, raise the water temperature at normal pressure from the natural state to 100°C, heat up for 20 minutes, and boil for 5 hours.

[0052] (3) Steam heat treatment: place the whole bamboo segment neatly in a steam tank, use a steam pressure of 0.20Mpa, and a temperature of 120°C for a constant heat treatment of 90 minutes.

[0053] (4) Drying: Put the steam heat-treated bamboo section into a drying kiln with steam spray function for drying, which is divided into the following stages:

[0054] a. Dry accumulation of the wh...

technical field

[0001] The invention belongs to the field of bamboo modification methods, in particular to a steam heat treatment type whole bamboo drying method. Background technique

[0002] my country is rich in bamboo resources and is the world's largest bamboo resource country. Bamboo has the characteristics of rapid growth, short rotation period, hollow bamboo joints, strong shear resistance, good rigidity, wear resistance, and excellent physical properties. Whole bamboo refers to the bamboo stalks that have been cut down without processing or only undergoing simple processing, such as not destroying the original cross-sectional structure of the bamboo, but just cutting it into a suitable length of bamboo, which can be used for construction, industrial and agricultural production, decoration and handicraft materials. At present, the utilization of bamboo in my country is mainly recombination utilization, and there are few studies on the deep processing and utilization...

Examples

Embodiment 1

[0041] (1) Raw material preparation: Select 4-year-old fresh moso bamboo with a diameter of about 140mm, and cut the fresh moso bamboo into 1.2m bamboo segments. Using artificial methods, small holes are put on the bamboo joints of the bamboo segments. The size of the hole can be adjusted as required, and the diameter R of the hole in this embodiment is 8 mm.

[0042] (2) Cooking treatment: immerse the bamboo segments in a mixed solution of 0.8% sodium chloride and 1% acetic acid, raise the water temperature at normal pressure from the natural state to 90°C, heat up for 15 minutes, and boil for 4 hours.

[0043] (3) Steam heat treatment: place the whole bamboo section neatly in a steam tank, use a steam pressure of 0.18 Mpa, and a temperature of 116°C for a constant heat treatment of 90 minutes.

[0044] (4) Drying: Put the steam heat-treated bamboo section into a drying kiln with steam spray function for drying, which is divided into the following operation stages:

[0045]...

Embodiment 2

[0050] (1) Raw material preparation: Select 4-year-old fresh moso bamboo with a diameter of about 140mm, and cut the fresh moso bamboo into 1.2m bamboo segments. Using artificial methods, small holes are put on the bamboo joints of the bamboo segments. The size of the hole can be adjusted as required, and the diameter R of the hole is 8mm.

[0051] (2) Cooking treatment: immerse the bamboo segments in a mixed solution of 0.8% sodium chloride and 1% acetic acid, raise the water temperature at normal pressure from the natural state to 100°C, heat up for 20 minutes, and boil for 5 hours.

[0052] (3) Steam heat treatment: place the whole bamboo segment neatly in a steam tank, use a steam pressure of 0.20Mpa, and a temperature of 120°C for a constant heat treatment of 90 minutes.

[0053] (4) Drying: Put the steam heat-treated bamboo section into a drying kiln with steam spray function for drying, which is divided into the following stages:

[0054] a. Dry accumulation of the wh...