CN201066198Y - Vertical type reverse-combusting coal-firing boiler - Google Patents

Abstract

The utility model relates to a coal-fired boiler, in particular to a vertical reversing-burning coal-fired boiler, which comprises a boiler body that comprises a coal-gas generation chamber, a combustion chamber and a re-burning chamber. The utility model is characterized in that the reversing-burning way is adopted, the boiler body is a vertical type, the upper part of the boiler body is provided with a chimney and an ash-removing door, and the lower part of the boiler body is provided with a water-returning pipe; the coal-gas generation chamber is provided with a coal storage cabin, a coal-feeding port, a ventilating port and a slag-removing port, wherein, air ducts are arranged at the coal-feeding port and the ventilating port; a fire-bar pipe is arranged inside the combustion chamber, the combustion chamber is divided by a plurality of water-jacket isolation plates, and the fuel-gas path presents two symmetrical double-S-shaped trends; a plurality of convection pipes are arranged inside the re-burning chamber. Compared with the prior art, the utility model has the advantages that the reversing-burning coal-combustion way is adopted and the fuel-gas path presents two symmetrical double-S-shaped trends, thereby improving the utilization rate of the fuel, the temperature loss is reduced from 300 DEG C to 130 DEG C; natural ventilation is adopted without a ventilating equipment and an air-inducing equipment, thereby greatly reducing the utilization cost; through the ventilation and the reversing-burning at multiple points, the fuel can be completely burned.

Description

Vertical flashback type coal burning boiler

Technical field

The utility model relates to a kind of coal-burning boiler, specifically a kind of vertical flashback type coal burning boiler.

Background technology

The small-sized multipurpose boiler that uses is generally direct-fired at present, the discharge flue that the burner hearth of the coal-burning boiler of direct combustion leads to the convection current heating section is generally in burner hearth above the fire grate, coal is on fire grate when work, to feed sufficient air in the burner hearth, allow coal that completing combustion under enough oxygen conditions is being arranged, air is to enter from fire grate below during coal burning, and coal is that discharge flue above the burner hearth enters the convection current heating section at the high-temperature flue gas after the burner hearth internal combustion.This direct-fired coal-burning boiler can produce a large amount of black smokes when burning, not only fuel availability is low, and contaminated environment.

The utility model content

For addressing the above problem, the utility model provides a kind of can play vertical flashback type coal burning boiler energy-conservation and minimizing fume emission effect.

For achieving the above object, the utility model is by the following technical solutions:

A kind of vertical flashback type coal burning boiler, body of heater comprise gas generating chamber, combustion chamber and secondary furnace, it is characterized in that: adopt the coal-fired mode of backfire, boiler furnace is vertical, upper of furnace body is provided with chimney and shoot door, and chimney is positioned at the furnace roof upper middle position, and shoot door is positioned at chimney both sides, furnace roof top; The bottom is provided with return pipe; Gas generating chamber is provided with coal store, coal filling hole, air inlet and breast hole, and coal filling hole is in the positive centre position of gas generating chamber; Coal filling hole and air inlet are equipped with the air channel; Be provided with furnace grate tube in the combustion chamber, by several water jacket partitions the combustion chamber separated, the combustion gas path becomes two S type trends of two symmetries; Be provided with a plurality of convection tubes in the secondary furnace.

Usefulness compared with prior art of the present utility model is:

Adopt the reverse combustion type coal combustion process, two S type trends that the combustion gas path becomes two symmetries have improved fuel availability, and the exhanst gas outlet temperature drops to 130 ℃ by 300 ℃; Adopt the nature air distribution,, greatly reduce use cost without equipment such as air blast, air inducing; By multiple spot air distribution and backfire, make fuel reach the purpose of completing combustion.

Description of drawings

Fig. 1 is the schematic diagram of vertical flashback type coal burning boiler.

Among the figure, 1 chimney, 2 shoot doors, 3 secondary furnaces, 4 combustion chambers, 5 coal filling holes, 6 air inlets, 7 convection tubes, 8 breast holes, 9 furnace grate tubes, 10 return pipes, 11 gas generating chamber, 12 coal stores, 13 water jacket partitions.

The specific embodiment

Below in conjunction with the accompanying drawing and the specific embodiment the utility model is described further:

A kind of vertical flashback type coal burning boiler, body of heater comprise gas generating chamber 11, combustion chamber 4 and secondary furnace 3, adopt the coal-fired mode of backfire, boiler furnace is vertical, upper of furnace body is provided with chimney 1 and two shoot doors 2, and chimney 1 is positioned at the furnace roof upper middle position, and shoot door 2 is positioned at chimney 1 both sides, furnace roof top; The bottom is provided with return pipe 10; Gas generating chamber 11 is provided with coal store 12, coal filling hole 5, two air inlets 6 and breast holes 8, and coal filling hole 5 is in the positive centre position of gas generating chamber 11; Coal filling hole 5 and two air inlets 6 are equipped with the air channel, wind at first enters the top of coal store 12 through the air channel, make and form backfire under the wind direction, wind is by breast hole 8 time, some wind enters in the stove from breast hole 8, form secondary air,, make fuel reach the purpose of completing combustion by multiple spot air distribution and backfire; Be provided with furnace grate tube 9 in the combustion chamber 4, combustion chamber 4 separated, improved combustion efficiency so greatly, make the combustion gas path become two S type trends of two symmetries by several water jacket partitions 13; Be provided with a plurality of convection tubes 7 in the secondary furnace 3, make full use of flue gas like this, increased the thermal efficiency.

Claims (2)

1. vertical flashback type coal burning boiler, body of heater comprises gas generating chamber (11), combustion chamber (4) and secondary furnace (3), it is characterized in that: adopt the coal-fired mode of backfire, boiler furnace is vertical, upper of furnace body is provided with chimney (1) and shoot door (2), chimney (1) is positioned at the furnace roof upper middle position, and shoot door (2) is positioned at furnace roof top chimney (1) both sides; The bottom is provided with return pipe (10); Gas generating chamber (11) is provided with coal store (12), coal filling hole (5), air inlet (6) and breast hole (8), and coal filling hole (5) is in the positive centre position of gas generating chamber (11); Be provided with furnace grate tube (9) in the combustion chamber (4), by several water jacket partitions (13) combustion chamber (4) separated, the combustion gas path becomes two S type trends of two symmetries; Be provided with a plurality of convection tubes (7) in the secondary furnace (3).

2. vertical flashback type coal burning boiler according to claim 1 is characterized in that: coal filling hole (5) and air inlet (6) are equipped with the air channel.

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