GB/T 34912-2024Guide for the energy-saving design of industrial boiler systems (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 34912-2017 "Guidelines for Energy-saving Design of Industrial Boiler Systems".

In addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) The scope was changed and "Energy-saving Design for Plateau Environment" was added (see Chapter 1, Chapter 1 of the 2017 edition);

b) Added the application principles of new materials, new technologies and new processes, and changed the energy efficiency rating principles of industrial boiler system energy-using equipment (See 4.1.8, 4.1.8~4.1.14 of the 2017 edition);

c) Added fuel quality principles for circulating fluidized bed boilers and biomass pellet fuel boilers (see 4.3.6 and 4.3.7);

d) Added the principles of multi-energy complementary systems of renewable energy and fossil energy, and energy storage systems (see 4.6);

e) Added the principle of "giving priority to renewable energy and clean fuels based on local policies and resource endowments" (see 5.1.3);

f) Deleted "Table 1 Requirements for coal quality of chain furnace" (see Table 1 of the 2017 edition);

g) The basic principles for boiler selection, the selection of layer-fired boilers, circulating fluidized bed boilers, pulverized coal industrial boilers, and oil and gas boilers have been changed.

Principles (see 5.1 to 5.5, 5.1 to 5.9 of the 2017 edition);

h) Added the selection principles for electrode-type electric heating boilers, electric thermal energy storage boilers, and biomass fuel boilers (see 5.6 to 5.8);

i) Added the principles of heating methods for steam heating systems (see 6.1.3);

j) The principle of continuous wastewater recycling of steam boilers has been changed (see 6.1.8, 6.1.8 of the 2017 edition);

k) Added the principle of heat recovery of exhaust steam from deaerator (see 6.2.5);

l) Added the principle of circulating water pump speed control (see 6.4.3);

m) Changes have been made to the operation of dual belt conveyors, the total coal consumption coefficient, the selection of silo pump systems in pneumatic ash conveying systems, and the use of vibrating conveyors for bottom ash conveying.

Principles of conveyor, oil tank heating and oil tank insulation (see 7.2.1, 7.2.8, 7.4.1, 7.4.3, 7.6.5, 7.6.7, 2017 edition 7.2.1, 7.2.8, 7.4.1, 7.4.3, 7.6.5, 7.6.7);

n) Changed the straight pipe lengths at the fan inlet and outlet, the selection of rated capacity of the desulfurization system, and the dust removal process principles (see 8.3.5, 8.4.1, 8.4.3, 8.3.5, 8.4.1, 8.4.3 of the 2017 edition);

o) The principle of waste heat recovery has been changed (see 9.2, 9.2 of the 2017 edition);

p) Changed the temperature of the outer surface of thermal insulation of thermal equipment, pipelines and accessories, and the principle of the maximum allowable heat dissipation loss on the outer surface of the insulation structure.

(See 10.1.2, 10.2.2, 10.3.2, and 10.1.2, 10.2.2, 10.3.2 of the 2017 edition);

q) The functional principles of the energy monitoring and management center have been changed (see 11.1, 11.2, 11.1, 11.2 of the 2017 edition);

r) Added energy-saving design for plateau environment (see Chapter 12);

s) Added the calculation method for carbon emissions from industrial boiler systems (see 13.4).

1 Scope

This document provides the general principles for energy-saving design of industrial boiler systems, boilers, steam-water systems and equipment, fuel and ash storage and transportation systems and Equipment, air and smoke systems and equipment selection, waste heat recovery, equipment and pipeline insulation, monitoring and control, plateau environment energy-saving design and industrial boilers Guidance on calculation methods of system energy-saving indicators, etc.

This document is applicable to single boilers with water as the medium, rated outlet steam pressure of 0.1MPa~3.8MPa, and rated steam temperature less than Industrial steam boiler systems with a rated outlet water pressure of 0.1 MPa to 2.5 MPa and industrial hot water boiler systems with a rated outlet water pressure of 450°C or above can design and transform.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

GB/T 150.1 Pressure vessels Part 1: General requirements GB/T 1576 Industrial boiler water quality GB/T 2900.48 Electrical terminology boiler GB/T 4272 General technical rules for thermal insulation of equipment and pipelines GB/T 8175 Guidelines for thermal insulation design of equipment and pipelines GB/T 13283 Accuracy grades of test instruments and display instruments for industrial process measurement and control GB/T 14285 Technical specification for relay protection and safety automatic devices GB/T 15317 Energy-saving monitoring of coal-fired industrial boilers GB/T 17954 Economic Operation of Industrial Boilers GB/T 18342 Commercial coal quality chain furnace coal GB 18613-2020 Energy efficiency limit values and energy efficiency grades for electric motors GB 19761-2020 Energy efficiency limit values and energy efficiency grades for ventilators GB 19762-2007 Energy efficiency limit values and energy saving evaluation values for clean water centrifugal pumps GB/T 20626.1 Special environmental conditions for plateau electrical and electronic products Part 1: General technical requirements GB 24500-2020 Energy efficiency limit values and energy efficiency grades for industrial boilers GB/T 26126 Commercial coal quality pulverized coal for industrial boilers GB 28381-2012 Energy efficiency limit values and energy saving evaluation values for centrifugal blowers GB/T 29052 Technical Guidelines for Water Saving and Consumption Reduction of Industrial Steam Boilers GB/T 32224 Heat meter GB/T 36699 Technical requirements for liquid and gas fuel burners for boilers GB 50016 Code for Fire Protection Design of Buildings GB 50041 Boiler room design standard GB 50049-2011 Design specification for small thermal power plants GB 50057 Code for Lightning Protection Design of Buildings