GB/T 29722-2021Commercial coal quality—Coal for entrained-flow gasification (English PDF)

4.1 General

Coal for entrained-flow gasification is classified into categories by volatile, classified into grades by ash and total sulfur, and expressed in the form of "category + ash grade + total sulfur grade". At the same time, the technical requirements for the slurry ability of water-coal slurry are proposed for coal used in water-coal slurry gasification.

4.2 Product category

Coal for entrained-flow gasification is divided into 4 categories according to coal type, namely anthracite for entrained-flow gasification, low volatile bituminous coal for entrained-flow gasification, medium-high volatile bituminous coal for entrained-flow gasification, and lignite for entrained-flow gasification; the abbreviated codes are QLQH-WY, QLQH-LVYM, QLQH-MHVYM, QLQH-HM, respectively. The

5.1 Total moisture

The determination of the total moisture of coal shall be carried out in accordance with GB/T 211.

5.2 Ash and volatile

The determination of ash and volatile of coal shall be carried out in accordance with

GB/T 212 or GB/T 30732. The arbitration of the ash of coal shall be performed in accordance with the slow ashing method in GB/T 212.

5.3 Calorific value

The calorific value of coal shall be measured according to GB/T 213.

5.4 Total sulfur

The determination of total sulfur of coal shall be carried out in accordance with GB/T 214 or GB/T 25214 and shall be carried out in accordance with the Eschka method in

GB/T 214 during the arbitration.

5.5 Phosphorus content

The determination of phosphorus content in coal shall be carried out in accordance with GB/T 216.

5.6 Chlorine content

The determination of chlorine content in coal shall be carried out in accordance with GB/T 3558.

5.7 Arsenic content

The determination of arsenic content in coal shall be carried out in accordance with GB/T 3058.

5.8 Mercury content

The determination of mercury content in coal shall be carried out in accordance with

GB/T 16659 or SN/T 3511.

5.9 Grindability index

The grindability index of coal (Hardgrove method) shall be determined in accordance with GB/T 2565.

6.4 Type inspection

6.4.1 Type inspection shall be carried out in the following cases:

a) Appraisal of new product design profile and appraisal of trial-batch production definition;

b) Raw materials, processes, and equipment change during formal production;

c) During formal production, an inspection shall be carried out every half a year or every batch of raw materials changed;

d) Production is resumed after batch production had been interrupted and stopped;

e) The national or local quality supervision and management department proposes type inspection requirements.

6.4.2 Type inspection items shall meet the requirements of Table 4.

6.5 Judgment rules

The quality of coal used for entrained-flow gasification shall be judged according to the provisions in Tables 1~Table 3. When the results of the factory inspection and type inspection meet the requirements, the batch of products shall be judged as qualified.

7.1 Identification

7.1.1 The commercial coal produced and sold shall be marked according to the provisions of GB/T 25209.

7.1.2 The accompanying documents for the circulation of coal marked as commercial shall include but not be limited to the following:

--- Product name;

--- Quantity;

--- Place of origin;