CN2384105Y - Vertical single-layer grate secondary air-feeding coal-burning fire tube steam boiler - Google Patents

Abstract

The utility model relates to a vertical secondary air-feeding coal-burning steam boiler with a single-layer grate and fire tubes, which comprises a skirt seat, a boiler body, a chimney and other boiler fittings, wherein, the boiler body is composed of a boiler casing (1), a boiler liner (3), transverse water tubes (4), fire tubes (2), etc. An air chamber is arranged in the skirt seat of the vertical secondary air-feeding coal-burning steam boiler with single-layer grate and fire tube, a plurality of fire tubes (2) are arranged on a lower sealing heat to a top sealing heat of the boiler liner (3) below which transverse water tubes (4) are obliquely arranged, the upper parts of the transverse water tubes (4) are provided with fireproof bricks, and a plurality of secondary air tubes (10) are also arranged in a secondary wind chamber of a combustion chamber (6). Secondary air enters the utility model from eight directions so that high-temperature fume forms rotary atmosphere to enhance the heat transfer and the mass transfer of fuel, and the utility model has little fly ash and realizes low discharge.

Description

The coal-fired fire tube steam boiler of vertical one-stor(e)y furnace deploying secondary wind

The utility model belongs to the Industrial Boiler field, refers in particular to the coal-fired fire tube steam boiler of vertical individual layer fire grate.

Boiler and the innovation and creation relevant with boiler thereof emerge in an endless stream, and the application case that Chinese patent relates to this field is thousands of.In order to improve the thermal efficiency, reduce air pollution, Chinese patent " secondary hot-air water-tube boiler " (ZL95227680), its furnace shell has the intermediate water wall, some hot-water lines are communicated with furnace sandwich water wall.Secondary air channel leads to the flame combustion zone of top, coal seam in the burner hearth after by the preheating of intermediate water wall, and the air-out aperture of secondary air channel is some small perforations, and this small perforations becomes camber line or straight line row example according to the burner hearth shape.But it is not suitable for multitubular boiler.

The purpose of this utility model is to provide a kind of vertical one-stor(e)y furnace deploying secondary wind coal-fired fire tube steam boiler, and it realizes coal-fired completing combustion, improves the thermal efficiency, and it is energy-conservation to economize on coal, and reaches white cigarette discharging, reduces air pollution, the protection environment.

For achieving the above object, the solution that the utility model is taked is: the coal-fired fire tube steam boiler of a kind of vertical one-stor(e)y furnace deploying secondary wind, comprise skirt, boiler body, chimney and other boiler fitting, boiler body is made of shell, flue, horizontal water tube, fire tube etc., at the mid-air compartment of boiler skirt, it is characterized in that: put some fire tubes on the flue low head to cover head, tilting horizontal water tube under the flue, block has refractory brick on horizontal water tube top, also is equipped with some secondary air channels in the secondary air chamber of combustion chamber.

Because the utility model also is provided with secondary air channel, secondary wind octahedral air intake makes high-temperature flue gas form rotation atmosphere, strengthens heat transfer, the mass transfer of fuel, therefore flying dust is few, has realized low emission, to the wide adaptability of fuel, applicable bituminous coal, anthracite, two class atures of coal, but and multifuel combustion combustiblerefuse.

Below in conjunction with embodiment and accompanying drawing thereof the beneficial effect of the utility model and generation thereof is remake description.

Fig. 1 is the schematic diagram of boiler body in the utility model.

Fig. 2 is the A-A view of Fig. 1.

The coal-fired fire tube steam boiler of a kind of vertical one-stor(e)y furnace deploying secondary wind, comprise skirt, boiler body, chimney and other accessory, boiler body comprises shell (1), flue (3), horizontal water tube (4), fire tube (2) etc., boiler body adopts spheroid pipe and the U type leftover bits and pieces circle with self-balancing function, need not design the stay bolt element; Convection heating surface is by being that screw-shaped fire tube (2) is formed, and some fire tubes (2) place the low head of flue (3) to cover head, realizes efficient heat transfer, reduces heating surface scaling phenomenon, has reduced water quality requirement; Flue (3) is tilting horizontal water tube (4) down, and building on horizontal water tube (4) top has refractory brick (11), and flame is risen around flue (3) wall, increases resistance, reduces cigarette ash and rises, and realizes low emission; Boiler is individual layer fire grate (8), and breast hole (7) and stoke hole (5) are arranged; The mid-air compartment of the skirt of boiler also is equipped with some secondary air channels (10) in the secondary air chamber (9) of combustion chamber (6).Secondary wind is blown into air blast from air inlet (12), and secondary wind octahedral air intake makes high-temperature flue gas form rotation atmosphere, guarantees full combustion of fuel, improves boiler thermal output, energy-conservation and minimizing environmental pollution.

Claims (2)

1, the coal-fired fire tube steam boiler of a kind of vertical one-stor(e)y furnace deploying secondary wind, comprise skirt, boiler body, chimney and other boiler fitting, boiler body is by shell (1), flue (3), horizontal water tube (4), fire tube formations such as (2), at the mid-air compartment of boiler skirt, it is characterized in that: put some fire tubes (2) to cover head on flue (3) low head, flue (3) is tilting horizontal water tube (4) down, block has refractory brick (11) on horizontal water tube (4) top, also is equipped with some secondary air channels (10) in the secondary air chamber (9) of combustion chamber (6).

2, the coal-fired fire tube steam boiler of a kind of vertical one-stor(e)y furnace deploying secondary wind according to claim 1 is characterized in that: the boiler convection heating surface is by being that screw-shaped fire tube (2) is formed.