GB 25960-2010Rules for steam coal blending (English PDF)

Foreword

4.2.3,4.2.5,4.3,6.1,6.2 this standard is mandatory, the rest are recommended.

Appendix A of this standard is a normative appendix.

The standard proposed by China Coal Industry Association.

This standard by the National Standardization Technical Committee of Coal.

This standard was drafted. Coal Research Institute Beijing Coal Chemical Research Branch, Shanxi Coal Transportation and Marketing Group Co., Ltd., Beijing Shenhua Chang Yun blending high-tech Co., Ltd., China University of Mining (Beijing).

Introduction

Blending power is defined according to the needs of industrial production, mixing several different quality coal uniformly together to give a new Coal products to meet all kinds of boilers or furnaces specified requirements. Blending power use help to improve combustion efficiency and reduce pollutants Emissions, promote the comprehensive utilization of coal resources.

This standard of power coal blending technology development, production status and market demand for trade as the main basis, taking full account of the variety of use Uses of steam coal blending quality. The development of standards is of great significance for promoting the development of power coal blending technology, improve the management level, can as steam coal blending quality control and regulate power blending market guidance.

Blending power specification

1 Scope

This standard specifies the quality requirements of raw materials blending power, coal blending and product quality requirements of steam coal blending.

This standard applies to utility boilers, industrial boilers, industrial furnaces, etc. used in production, quality control and sale of steam coal blending product.

This standard does not apply to coal gangue power plant.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB 474 coal sample preparation GB 475 coal samples of goods taken by artificial methods GB/T 5751 Chinese coal classification GB/T 7562 power pulverized coal boiler technology Condition GB/T 7563 Technical condition of coal for cement rotary kiln GB/T 15224.1 coal quality - Part 1. Ash GB/T 15224.2 coal quality - Part 2. sulfur GB/T 15224.3 coal quality - Part 3. heat GB/T 18342 Stoker Technical condition of coal GB/T 18666 commercial coal quality sampling and inspection methods GB/T 19494.1 coal mechanization sampling - Part 1. Sampling GB part/T 19494.2 coal mechanization sampling 2. Preparation of coal sample

3 Terms and Definitions

The following terms and definitions apply to this standard.

Coal coal

coal

Mainly from plant remains through coalification turned into a solid combustible organic carbon-rich sediments, a certain amount of minerals, corresponding the ash content of less than or equal to 50% (dry mass).

[GB/T 5751-2009, Definition 3.1].

Coal fuelcoal; steamcoal to take advantage of the calorific value of coal by burning coal known as thermal coal. Mainly for power generation pulverized coal boilers, industrial boilers and industrial furnaces and the like.

Steam Coal Blending According to the needs of industrial production, according to scientific calculations or blending ratio by the combustion test obtained in which two or more different quality thermal coal Mixed together or with the additive according to the environmental needs of the production process of a new thermal coal product uniformly.

Steam coal blending product steamcoalblendingproducts A mixture of coal products produced according to a certain target depending on the quality of coal.

Blending ratio coalblendingratio Various quality coal blending ratio scores.

Product quality steam coal blending target qualitytargetofsteamcoalblendingproduct Coal quality index value steam coal blending product to be achieved in order to calorific value of coal, sulfur and volatile into the main reference index.

Product quality steam coal blending theoretical value qualitycomputationofsteamcoalblendingproduct by blending various coal quality index value than the calculated power blending products.

Blending quality Found qualitydeterminationofsteamcoalblendingproduct the actual measured value of power coal quality blending product.

4 Blending power quality requirements of raw materials

5 Steam coal blending

6 Quality steam coal blending product requirements

6.1 Blending power quality products should meet the requirements of the user, wherein.

--- Pulverized coal boiler for the generation of power quality products should meet the blending of GB/T 7562's;

--- For quality Stoker Coal Blend products should comply with GB/T 18342 requirements;

--- Quality steam coal blending for cement rotary kilns products should comply with GB/T 7563 requirements of.

6.2 All power quality should be consistent with the use of blending products to the environmental protection department of the coal quality requirements.

6.3 Dynamic blending the product should be mixed. Coal quality steam coal blending product of the measured value and the relative value of the difference should be less than the target value 10%. Coal quality indicators may include ash (Ad), volatile (Vdaf), heat (Qgr, d) and sulfur (St, d) and the like.

7 Quality inspection and acceptance

7.1 GB 475 coal samples press or GB/T 19494.1 provisions taken or prepared according to the provisions of GB 474 GB/T 19494.2 of.

7.2 Special steam coal blending product sales should be accompanied by instructions, special instructions to add the amount of material and the main characteristics of indicators.

7.3 product quality inspection and acceptance by the implementation of the provisions of GB/T 18666 of.

Appendix A

(Normative)

QUALITY theoretical value steam coal blending computing products QUALITY A.1 to receive theoretical values based blending ratio of steam coal blending computing products A.1.1 coal quality data as received value, according to the formula (A.1) calculated as follows.

Xar = Xar, 1 × alpha1 Xar, 2 × alpha2 Xar, n × alphan (A.1) where.

Xar --- represents steam coal blending product Aar (%), Var (%), St, ar (%) or Qnet, ar (MJ/kg);

Xar, 1, Xar, 2,, Xar, n --- represents n kinds of raw coal corresponding Aar, 1, Aar, 2,, Aar, n (%), Var, 1, Var, 2,, Var, n (%), St, ar, 1, St, ar, 2,, St, ar, n (%) or Qnet, ar, 1, Qnet, ar, 2,, Qnet, ar, n (MJ/kg);

alpha1, alpha2,, alphan --- n kinds of raw coal as received blending mass ratio,%.

A.1.2 dried coal quality data for the base value, according to equation (A.2) calculated as follows.

Xd = Xd, 1 × alpha1 × (100-Mar, 1) Xd, 2 × alpha2 × (100-Mar, 2) Xd, n × alphan × (100-Mar, n) alpha1 × (100-Mar, 1) alpha2 × (100-Mar, 2) alphan × (100-Mar, n) (A.2) where.

Xd --- represents steam coal blending product Ad (%), Vd (%), St, d (%) or Qgr, d (MJ/kg);

Xd, 1, Xd, 2,, Xd, n --- represents n kinds of raw coal corresponding Ad, 1, Ad, 2,, Ad, n (%), Vd, 1, Vd, 2,, Vd, n (%), St, d, 1, St, d, 2,, St, d, n (%) or Qgr, d, 1, Qgr, d, 2,, Qgr, d, n (MJ/kg);

Received Mar, 1, Mar, 2,, Mar, n --- n kinds of raw coal base moisture,%;

alpha1, alpha2,, alphan --- n kinds of raw coal as received blending mass ratio,%.

A.1.3 coal quality data for the dry ash-free basis volatile time division Vdaf, according to equation (A.3) calculated as follows.

Vdaf = Vdaf, 1 × alpha1 × (100-Mar, 1-Aar, 1) Vdaf, 2 × alpha2 × (100-Mar, 2-Aar, 2) Vdaf, n × alphan × (100-Mar, n-Aar, n) alpha1 × (100-Mar, 1-Aar, 1) alpha2 × (100-Mar, 2-Aar, 2) alphan × (100-Mar, n-Aar, n) (A.3) where.

Vdaf --- dried ash-free basis volatile steam coal blending product,%;

Vdaf, 1, Vdaf, 2,, Vdaf, n --- n kinds of dried raw coal ash-free basis volatile,%;

Received Mar, 1, Mar, 2,, Mar, n --- n kinds of raw coal base moisture,%;

Aar, 1, Aar, 2,, Aar, n --- n kinds of raw coal ash as received,%;

alpha1, alpha2,, alphan --- n kinds of raw coal as received blending mass ratio,%.

A.2 to dry basis blending ratio of the theoretical value of power coal quality blending computing products A.2.1 coal quality data for the dry base value, according to equation (A.4) calculated as follows.

Xd = Xd, 1 × beta1 Xd, 2 × beta2 Xd, n × betan (A.4) where.

Xd --- represents steam coal blending product Ad (%), Vd (%), St, d (%) or Qgr, d (MJ/kg);

Xd, 1, Xd, 2,, Xd, n --- represents n kinds of raw coal corresponding Ad, 1, Ad, 2,, Ad, n (%), Vd, 1, Vd, 2,, Vd, n (%), St, d, 1, St, d, 2,, St, d, n (%) or Qgr, d, 1, Qgr, d, 2,, Qgr, d, n (MJ/kg);

beta1, beta2,, betan --- n kinds of raw coal quality blending dry basis ratio,%.

A.2.2 coal quality data for the dry ash-free basis volatile time division Vdaf, according to equation (A.5) calculated as follows.

Vdaf = Vdaf, 1 × beta1 × (100-Ad, 1) Vdaf, 2 × beta2 × (100-Ad, 2) Vdaf, n × betan × (100-Ad, n) beta1 × (100-Ad, 1) beta2 × (100-Ad, 2) betan × (100-Ad, n) (A.5) where.

Vdaf --- dried ash-free basis volatile steam coal blending product,%;

Vdaf, 1, Vdaf, 2,, Vdaf, n --- n kinds of dried raw coal ash-free basis volatile,%;

Ad, 1, Ad, 2,, Ad, n --- n kinds of raw coal ash dry basis,%;

beta1, beta2,, betan --- n kinds of raw coal quality blending dry basis ratio,%.

Theory A.3 steam coal blending product ash fusion temperature of calculation Ash fusion temperature of steam coal blending product according to formula (A.6) calculated as follows.

T = T1 × Ad, 1 × beta1 T2 × Ad, 2 × beta2 Tn × Ad, n × betan Ad, 1 × beta1 Ad, 2 × beta2 Ad, n × betan (A.6) where.

Ash fusion temperature T --- steam coal blending products, namely DT, ST, HT, FT, °C;

T1, T2,, Tn --- n kinds of raw coal and steam coal blending product corresponding to the ash fusion temperature, °C;

Ad, 1, Ad, 2,, Ad, n --- n kinds of raw coal ash dry basis,%;

beta1, beta2,, betan --- n kinds of raw coal quality blending dry basis ratio,%.