Some standard content:
ICS23.160
Machinery Industry Standard of the People's Republic of China
JB/T10277-2001www.bzxz.net
Box type wood dryer with hot-ain
Published on 2001-06-04
China Machinery Industry Federation
Implemented on 2001-10-01
JB/T10277—2001
Appendix A, Appendix B and Appendix C of this standard are all appendices of the standard. This standard is proposed and managed by the Mechanical Industry Drying Equipment Standardization Technical Committee. The drafting units of this standard are: Longquan Shuangyi Co., Ltd., Zhejiang Province, and Wuhan Institute of Chemical Technology. The main drafters of this standard are: Ye Shengyi, Wu Yuan, Li Feng, and Wu Huiming. This standard is released for the first time.
1 Scope
Machinery Industry Standard of the People's Republic of China
Box type wood dryer with hot-air
Box type wood dryer with hot-air
JB/T10277—2001
This standard specifies the structural type, basic parameters, technical requirements, test methods, inspection rules and packaging, transportation, storage and other requirements of box type hot-air wood dryer (hereinafter referred to as dryer). This standard is applicable to box type hot-air wood dryer with biomass (wood scraps, etc.) as the main fuel, and can also be implemented by reference to box type hot-air wood dryer with liquefied petroleum gas, coal and fuel oil as fuel. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest version of the following standards. GB191—2000
GB/T1931—1991
GB/T6491—1999
GB/T133061991
SJ/T106741995
3 Type and basic parameters
3.1 Structural type
Packaging, storage and transportation diagrams
Method for determining the moisture content of wood
Drying quality of sawn timber
General technical conditions for coating
3.1.1 The dryer is box-type (single box or multiple boxes) and uses forced circulating hot air as the drying medium. 3.1.2 The dryer is mainly composed of an oven, a built-in combustion furnace, a heat exchanger, an exhaust pipe, an axial flow fan, etc. 3.1.3 When it is necessary to humidify and dry the unfinished timber, a steam furnace can be added. 3.2 Model
3.2.1 Model Indication Method
Improved Design Sequence Code (A, B, C.) Effective Stacking Volume of Drying Oven, m
Auxiliary Features (Drying Method Code). Indicated by the first capital letter Q of the Chinese Pinyin of the word "气" in "热气"
Indicated by the first capital letter M of the Chinese Pinyin of the word "木" in "木头"Indicated by the first capital letter G of the Chinese Pinyin of the word "干" in "干设备"Approved by China Machinery Industry Federation on June 4, 2001, implemented on October 1, 2001
3.2.2 Marking Example
JB/T10277—2001
The effective stacking volume of the drying oven is 16m2. The first design of the box-type hot air wood dryer: GMQ-16. The effective stacking volume of the drying oven is 16m3. The first improved design of the box-type hot air wood dryer: GMQ-16A. 3.3 Basic parameters
The basic parameters of the dryer should comply with the provisions of Table 1. Table 1 Basic parameters
Overall dimensions
(length×width×height)
3.5×2.2×2.1
4.5×3.0X26
5.2X3.0×26
6.2X3.4×2.8
Effective stacking volume
Calculated material loading
Note: Other specifications of dryers shall be used according to the oven volume for reference 4 Requirements
Maximum hot air
Working temperature
Drying intensity
kg(H,o）/(m2-h)
Heat consumption
/kg（HO)
≤9000
4.1 The dryer shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved through the prescribed procedures or the requirements of the agreement between the supply and demand parties. 4.2 When the dryer is unloaded, it can evenly deliver hot air into the oven, and the temperature difference of each point in the oven is not more than 4℃C. The temperature difference of each oven of the multi-box dryer is not more than 5℃.
4.3 The surface temperature of the built-in motor of the axial fan is not higher than 65℃, and the temperature rise of the external motor is not more than 35℃. 4.4 The cold insulation resistance of the live parts is greater than 1M2. 4.5 The appearance quality of the metal surface coating shall comply with the appearance quality requirements of Class I coating in 1.3.1 of SJ/T106741995. 4.6 After the sawn timber is dried by the dryer, its drying quality shall comply with the drying quality requirements of Class II in GB/T6491 (or meet the quality requirements specified in the contract between the supply and demand parties).
4.7 The drying intensity of the dryer shall comply with the provisions of Table 1. 4.8 The unit heat consumption of the dryer shall comply with the provisions of Table 1. 4.9 Under the condition that the user complies with the maintenance and correct operation rules of the dryer, the reliable working time of the dryer host shall be greater than 5000h. 5 Test methods
5.1 The test conditions and process requirements for the dryer type shall be carried out in accordance with the provisions of Appendix A. 5.2 The temperature difference of the dryer oven shall be measured with a thermometer with an accuracy of not less than 1.5. The temperature difference in the oven shall be measured at more than 5 evenly distributed measurement points. For the temperature difference of multiple ovens, 3 measurement points shall be evenly distributed at the hot air inlet of each oven. The temperature difference of each oven shall be calculated by the average value of the temperatures measured at the three points.
5.3 The size of the oven shall be measured with a steel tape measure. 5.4 The maximum working temperature of the hot air shall be measured with a thermometer (meter) with an accuracy of not less than 1.5. 5.5 The surface temperature and temperature rise of the axial fan motor shall be measured with a thermometer with an accuracy of not less than 1.5. After the dryer has been working for 2 hours, the measurements shall be taken at the front cover, rear cover and middle part of the motor and the average value shall be taken. 2
JB/T10277—2001
5.6 The cold insulation resistance of live parts shall be measured by an insulation tester with an accuracy of not less than 1.5. The appearance quality of metal surface coating shall be visually inspected. 5.7
The moisture content of sawn timber shall be measured in accordance with the provisions of GB/T1931. 5.9
The quality of sawn timber after drying shall be tested in accordance with the requirements of Class II in GB/T6491. 5.10 The drying intensity of the dryer shall be calculated in accordance with the provisions of Appendix B. 5.11 The heat consumption of the dryer shall be calculated in accordance with the provisions of Appendix C. 6 Inspection rules
6.1 The dryer shall be inspected and qualified by the quality inspection department of the manufacturer and accompanied by a product quality certificate before it can leave the factory. 6.2 Factory inspection and type inspection of dryers 6.2.1 Factory inspection
6.2.1.1 Each dryer must be inspected, that is, a no-load running test of not less than 2 hours, and an inspection of the dimensions in Table 1 and the provisions of 4.3, 4.4, and 4.5 (the dryer is not ignited). 6.2.1.2 If any of the factory inspection items is unqualified, the product is unqualified. 6.2.2 Type inspection
6.2.2.1 Type inspection should be carried out when the product has any of the following conditions: a) When a new product is trial-produced or transferred to another factory; b) When the product is produced again after being discontinued for two years;
C) Every 100 units (referring to the same specifications) produced during normal production; d) When there are major changes in the structure, material, and process of the product; e) When the national quality supervision agency proposes a type inspection requirement. 6.2.2.2 In addition to the contents of factory inspection, type inspection also requires inspection of 4.2, 4.6, 4.7, and 4.8. 6.2.2.3 During type inspection, if one of the provisions of 4.2, 4.3, 4.4, 47, and 4.8 fails to meet the requirements, double sampling shall be conducted for re-inspection of the failed items. If the requirements are still not met, the product shall not be accepted. 7 Marking, packaging, storage and transportation, and graphic marking
7.1 Marking
7.11 Each product shall be fixed with a sign in a conspicuous place. Its type, size and technical requirements shall comply with the provisions of GB/T13306, and its contents shall include: a) Factory address and factory name;
b) Product name and model;
c) Registered trademark:
d) Product factory number or production batch number:
e) Product main parameters:
f Manufacturing date.
7.1.2 Warning signs (words) should be eye-catching.
7.1.3 Product packaging, storage and transportation, and graphic signs should comply with GB191. 7.1.4 Transportation, packaging, and shipping and receiving signs should comply with GB/T6388. 7.2 Packaging
JB/T10277—2001
7.2.1 The dryer does not need an outer package. If the user requires it, it shall be agreed upon by both parties. 7.2.2 The accompanying documents of the dryer include:
a) Product certificate;
b) Product instruction manual;
c) Packing list.
7.3.1 The dryer shall be covered with a canopy or rainproof cover when stored. 2 The dryer shall be maintained once if the storage time exceeds 12 months. 7.3.2
There shall be a canopy or rainproof measures during transportation.
Test conditions
JB/T10277—2001
Appendix A
(Appendix of the standard)
Type test conditions and process requirements of box-type hot air wood dryer The test object shall be fresh wet pine (including white pine, red pine, and masson pine). The average temperature of the test environment is 10~30℃, the relative humidity of the air is not more than 90%, and the ventilation conditions are good. A12
During the test, the dryer should operate continuously without interruption. A1.3
The amount of wood loaded in the dryer during the test should meet the design requirements. A1.4
The thickness of the sawn timber during the test should be between 15~25mm. The initial moisture content of the wood is required to be between 75%~100% (wet basis). Process requirements
According to the dehydration mechanism and biological characteristics of pine wood, the drying process is carried out according to the curve in Figure A1. -
Ten Ye Initial Stage
10--14
Middle Stage of Drying
[Late Stage of Drying
12 ~ 1h
Drying time and temperature conditions
Completion period
Environmental conditions
Drying time
JB/T10277—2001
Appendix B
(Appendix to the standard)
Calculation method of drying intensity of box-type hot air wood dryer The volumetric drying intensity of the dryer is calculated according to formula (B1): m(ww)
tv(l-w2)
Where: Pv—drying intensity, kg (H,O)/(m·h); V
-effective stacking volume of the dryer, m:
Working time of the dryer for each batch of materials, h:||tt ||Wood mass before drying, kg:
Wood moisture content before drying, %
Wood moisture content after drying, %
JB/T10277—2001
Appendix C
(Appendix to the standard)
Calculation method of unit heat consumption of box-type hot air wood dryer The unit heat consumption of the dryer is the heat required to vaporize each kg of water during the drying time. The heat consumption is calculated according to formula (CI):
Where: g——unit heat consumption, kJ/kg(H,O):B——fuel consumption during the test time, kg:Q——low calorific value of fuel, kJ/kg:△w—amount of water dehydrated during the test time, kg.
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Mechanical Industry Standard
Box-type hot air wood dryer
JB/T10277-2001
Published and issued by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2, Shouti South Road, Beijing: Postal Code 100044)*
Book size 880X12301/16 Printing sheet 3/4
4 Word count 18000
First edition in September 2001
First printing in September 2001
Print run 1-500
Price 1200 yuan
2001-094
Mechanical Industry Standard Service Network: http/AvwwJB.ac.cn10z
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