NB/T 34006-2020Specification for clean heating stoves (English PDF)

3.1 Clean heating stoves

Burning clean coal and biomass briquette fuels that meet the heating thermal efficiency and air pollutant emission level 2 indicators or more specified in this document Heating stove.

3.2 Rated heat power

The continuous and stable output of heat per unit time when the stove supplies heat under rated conditions.

3.3 Thermal efficiency

The percentage of the effective use of heat output by the stove to the heat input of the fuel.

3.4 Cooking power

A heating stove with a cooking function, the effective heat absorbed by the pot water per unit time, is also called the cooking fire intensity.

3.5 High-power

The stove runs under rated conditions, also known as fire.

3.6 Low-power

The heat output of the stove is the combustion condition when the rated heat supply is 30% to 40%, also called small fire.

3.7 Clean coal

Products that can reduce pollution emissions and improve utilization efficiency after coal is washed or processed. The clean coal in this document refers to briquette, anthracite, Wash bituminous coal and blue charcoal.

3.8 Densified biofuel

A solid fuel whose density is increased by compressing biomass raw materials into regular shapes through special equipment.

4.1 Classification

4.1.1 Divided by fuel type a) Clean coal stoves; b) Biomass stove.

4.1.2 According to the feeding and control method, it is divided into.

a) Manually control the stove;

b) Automatic control of stoves.

4.1.3 Divided by function type c) Heating stove;

d) Cooking and heating stoves.

4.2 Coding

The product code structure consists of stove type, fuel type, control method, rated heat supply and serial number, as shown in Figure 1.

6.1 Basic requirements

6.1.1 The stove structure should be designed reasonably, with good airtightness, convenient operation, safe and reliable. The appearance should be beautiful, with a smooth surface and no burrs glitch.

6.1.2 The auxiliary machinery and accessories of the stove shall comply with the corresponding national product standards.

6.1.3 A safety explosion-proof device should be installed on the back of the stove; the burst pressure should not exceed 0.2MPa when using bursting discs, and the inner diameter of the discharge hole should not be less than 25 mm, performance should meet the requirements of GB 567.

6.1.4 For automatic control stoves, electrical installations should be reliably grounded. The controller should meet the requirements of GB 14536.1 and have automatic feeding control And operation, automatic alarm, main room temperature display and other basic functions.

6.2 Manufacturing requirements

6.2.1 The surface of castings should be smooth and free of defects such as cracks, pores, and sand holes.

6.2.2 Welded parts should be flat and uniform, free of defects such as burn-through, slag inclusion, pores, and incomplete penetration.

6.2.3 The stamping parts shall be free of defects such as cracks, wrinkles, flashes, burrs and so on.

6.2.4 The surface of the sheet metal parts should be smooth and free of defects such as cracks, wrinkles, bumps, etc., and the machined surface should not have defects such as knocks, bumps, scratches, etc.

6.2.5 The riveted parts should be firm, and the rivets should not be loose or skewed.

6.2.6 Furnace tiles (blanks) should be resistant to high temperature and have no defects, and their size, shape and thickness should meet the design requirements.

6.2.7 The outer wall of the furnace shall be treated with rust prevention, and the rust prevention layer shall be waterproof and not easy to fall off.

6.2.8 When cast iron is used for the hot water absorbing jacket, the wall thickness should not be less than 4 mm; when carbon steel is used, the nominal thickness of the steel plate on the heated surface should not be less than 4 mm.

Less than 3 mm, and the nominal thickness of the non-heated surface steel plate shall not be less than 2 mm.

6.2.9 There should be sufficient circulating water cross-sectional area inside the hot water absorbing jacket, and the width of the interlayer of the hot water absorbing jacket (the net between the inner and outer walls of the hot water absorbing jacket) Distance) should meet the requirements of Table 2.