GB/T 29374-2022Grain and oils storage—Code of practice for applicative technology of grain chiller (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting.

This document replaces GB/T 29374-2012 "Technical Regulations for the Application of Grain Coolers for Grain and Oil Storage", and GB/T 29374-2012 In comparison, except for structural adjustments and editorial changes, the main technical changes are as follows.

--- Changed the configuration requirements related to the horizontal valley cooling ventilation (see 4.1.1, 4.1.2, 4.1.1, 4.1.2, 4.1.3 of the 2012 edition);

--- Added the requirements for the warehouse when the horizontal valley cooling ventilation is used (see 4.2.2, 4.2.4);

--- Increased operating conditions for horizontal valley cooling ventilation (see 4.3.2.5, 4.3.3.2);

--- Increased valley cold ventilation operating procedures (see Chapter 6);

--- Changed the speed requirement when the grain cooler moves (see 7.1.1.1, 6.1.1.1 of the 2012 edition);

--- Added other preparations related to horizontal valley cooling ventilation (see 7.2.3, 7.2.5, 7.2.6, 7.2.7);

--- Increased the connection requirements of the split grain cooler and the ventilation system (see 7.3.2, 7.3.3, 7.3.5);

--- Changed the cooling ventilation parameters (see 7.4.3, 7.4.4, 6.1.3.3, 6.1.3.4 of the 2012 edition);

--- Added cross ventilation cooling ventilation parameters and other related requirements (see 7.4.5, 7.4.7);

--- Added instructions for operation and management during valley cold ventilation (see 7.5.1.2, 7.5.1.3, 7.5.1.5, 7.5.3.1, 7.5.3.4, 7.5.3.5);

---Changed the grain cooler low-temperature grain storage operation card (see Appendix E, Appendix E of the 2012 edition).

1 Scope

This document specifies the configuration requirements for the application of grain coolers and the requirements for equipment operators, and establishes the operating procedures for grain cooler ventilation.

It stipulates the preparation before the valley cold ventilation, the operation and management during the ventilation period, the management after the ventilation is over, and other operation instructions, as well as the start of the valley cold ventilation. and the end conditions, describe the low-temperature grain storage operation record of the grain cooler, the setting of the air relative humidity at the air outlet of the grain cooler, the grain cold ventilation Corresponding verification methods such as unit energy consumption assessment of wind and unit cost calculation of reducing grain temperature.

This document is applicable to the vertical grain cooling and ventilation of room-type silos, shallow round silos and vertical silos for storing various raw grains, oil crops and non-powder finished grains, and horizontal valley cooling ventilation for room-type warehouses with a span of 24m or less.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 18835 Grain cooler

GB/T 25229 Airtightness requirements for grain and oil storage bungalows

GB/T 26882.1 Grain and Oil Storage Grain Situation Monitoring and Control System Part 1: General Rules

GB/T 29890 Technical Specifications for Grain and Oil Storage

LS/T 1202 Technical Regulations for Mechanical Ventilation of Grain Storage

LS/T 1220 Technical specification for horizontal ventilation of one-storey warehouse

3 Terms and Definitions

The following terms and definitions defined in GB/T 29890 apply to this document.