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LST1220-2020: Technical regulation of transverse ventilation for stored grain in warehouses
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| LS/T 1220-2020 | English | 529 |
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Technical regulation of transverse ventilation for stored grain in warehouses
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LS/T 1220-2020
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Basic data | Standard ID | LS/T 1220-2020 (LS/T1220-2020) | | Description (Translated English) | Technical regulation of transverse ventilation for stored grain in warehouses | | Sector / Industry | Food & Beverage Industry Standard (Recommended) | | Classification of Chinese Standard | B20 | | Classification of International Standard | 65.040.20 | | Word Count Estimation | 23,284 | | Date of Issue | 2020-01-21 | | Date of Implementation | 2020-07-21 | | Issuing agency(ies) | National Grain and Material Reserves Administration | LST1220-2020: Technical regulation of transverse ventilation for stored grain in warehouses---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Technical regulation of transverse ventilation for stored grain in warehouses
ICS 65.040.20
B20
People's Republic of China Food Industry Standard
Technical regulations for horizontal ventilation of warehouse
2020-01-21 release
2020-07-21 implementation
Issued by the National Grain and Material Reserve Bureau
Contents
Foreword Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 System composition 2
5 Basic requirements 2
5.1 Requirements for warehouses and grain storage 2
5.2 Grain pile sealing and air tightness requirements 2
5.3 Basic requirements for design and installation of horizontal ventilation pipe network 3
5.4 Basic fan installation requirements 3
5.5 Requirements for grain condition detection in ventilation operations 4
6 Determination of process parameters 4
6.1 Unit ventilation 4
6.2 Ventilation per unit area of grain heap 4
6.3 Total ventilation 4
6.4 Wind speed 4
6.5 System resistance 4
6.6 Path ratio 4
6.7 Spacing of branch ducts 4
7 Operating conditions 5
7.1 Cooling and ventilation 5
7.2 High-moisture grain precipitation and ventilation 5
8 Operation and management 6
8.1 Preparation before ventilation 6
8.2 Ventilation facility preparation 6
8.3 Safety inspection before ventilation 6
8.4 Management and maintenance 6
8.5 Food condition inspection before and after ventilation and during ventilation 7
8.6 Management and maintenance after the end of ventilation 7
Appendix A (Normative Appendix) Calculation Method of Process Parameters of Lateral Ventilation System 8
Appendix B (informative appendix) Method for determining the parameters of grain ventilation conditions 11
Appendix C (Informative Appendix) Safety Checklist for Operation and Use of Horizontal Ventilation System of Bungalow 20
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the National Grain and Material Reserve Bureau.
This standard is under the jurisdiction of the National Grain and Oil Standardization Technical Committee (SAC/TC270).
This standard was drafted by. Scientific Research Institute of National Grain and Material Reserve Bureau, International Trade Engineering Design Institute, Zhejiang Grain Reserve Management Company, Liaoning
Ning Provincial Institute of Grain Science, Wuhan University of Light Industry, Hebei Qingyuan National Grain Reserve, Southwest Suburb Grain Collection and Storage, Henan Future Machinery
Electric Engineering Co., Ltd.
The main drafters of this standard. Li Fujun, Zhao Huiyi, Shi Tianyu, Wei Lei, Cao Yang, Wu Zidan, Qiu Ping, Li Xingjun, Yu Lei, Huang Zhijun, Li Yong,
Gao Binbin, Cao Yi, Shu Zaixi, Jin Jiande, Ji Zhenjiang, Gao Yushu.
Technical regulations for horizontal ventilation of warehouse
1 Scope
This standard specifies the terms and definitions, system composition, basic requirements, process parameters, operating conditions, and operations of horizontal ventilation technology for warehouses
And management etc.
This standard applies to the horizontal ventilation of bulk warehouses with a span of no more than 27m.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document.
GB/T 25229-2010 Airtightness requirements for grain and oil storage cottages
GB/T 29890 Technical Specification for Grain and Oil Storage
GB 50320 Design Specification for Grain Storehouse
JB8523 explosion-proof ventilator technical conditions
LS/T 1201 Phosphine Circulation Fumigation Technical Regulations
LS/T 1202-2002 Technical regulations for ventilation of grain storage machinery
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Bungalow warehouse horizontal ventilationtransverse ventilation for stored graininwarehouse
Use the suction fan installed on the vent on the side of the warehouse, through the horizontal ventilation pipe network to make the air flow from the vent on the side opposite the warehouse
Inhale and laterally pass through the film-covered grain pile and discharge it from the fan, thereby changing the gas state parameters in the grain pile and adjusting the temperature and humidity of the grain pile
Etc., to achieve a safe way to store grain or improve the quality of grain storage processing technology.
3.2
Airflowrateperunitareaofgrain
The amount of air passing through a unit area in a direction perpendicular to the ventilation airflow per unit time, also known as the apparent wind speed, is expressed by a V meter, and the unit is m3 /
(s · m2) or m/s.
3.3
Unit ventilation airflowratepertonofgrain
The volume of air passing through the unit mass of grain per unit of time is denoted by q and the unit is m3/(h · t).
Note. Rewrite LS/T 1202-2002, definition 3.2.
3.4
Total air quantity
The total volume of air passing through the lateral ventilation system per unit time, expressed as Q total, in m3/h.
Note. Rewrite LS/T 1202-2002, definition 3.3.
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