CN1045655C - High effective and energy saving boiler with two-layer fire grates - Google Patents

Abstract

The present invention relates to a novel plane wave-shaped reverse burning boiler provided with a double-layer fire grate. A water pipe fire grate at the upper layer of the present invention is designed into a plane wave shape, and accordingly, the air permeability of the reverse burning fire grate is enhanced; reverse burning intensity is enhanced so that the combustion intensity and the capacity of the whole boiler are both improved. The present invention is suitable for manufacturing a new generation vertical and horizontal reverse burning boiler provided with the double-layer fire grate.

Description

A kind of high effective and energy saving boiler with two-layer fire grates

The invention provides a kind of boiler with two-layer fire grates of high-strength burning.

There are following three defectives in the boiler with two-layer fire grates of extensively having been promoted at present:

1 combustion intensity is low, and it is low to exert oneself, and causes the waste of guiding principle material.

2 upper strata water pipe furnace grate ventilating air permeabilities are poor, and combustion intensity is low, force to mend on lower floor's fire grate to add soft coal, cause over-emitting black exhaust.

Fouling, plugging, burning damage accident easily take place in 3 upper grate water pipes.

Causing the main cause of these defectives, is because the gap of last layer plane water pipe furnace grate will be this plane limit ventilation gap of maximal clearance with the gap of freely not leaving out by mistake soft coal, makes this stove and accessory that above inherent shortcoming be arranged.

The present invention is according to the coal piling mechanics principle, the upper strata water pipe furnace grate is designed to the plane undaform, replaces plane clearance with bigger gap, inclined-plane, makes that freely to leave out by mistake the soft coal amount suitable with plane clearance, but strengthened ventilation gap, thereby improved the anti-combustion intensity of burning of upper grate.

In conjunction with being the accompanying drawing of example, the combustion mechanism of this structure is illustrated with vertical double fire grate back firing boiler.

Among the figure: (2) are plane, upper strata undaform water pipe furnace grate.

Essence for convenience of explanation, plane undaform fire grate is realized like this: all odd number fire bars of a plane fire grate are moved down a distance, promptly.

If the horizontal maximal clearance between the fire grate of plane is a, move down back this gap and become gap, inclined-plane a ', its angle is $\mathrm{\θ},a^{\′}=\frac{a}{\mathrm{COS\θ}}$ , to establish gap top coal piling x wire and heavily be W, the horizontal clearance a pressure of reaching the standard grade is P, then a ' the pressure of reaching the standard grade in gap, inclined-plane is $P^{\′}=\frac{W}{a^{\′}}$ =PCOSθ P′＜P

Though push away to such an extent that gap, inclined-plane a ' has increased thus, by the minimizing of coal piling pressure thereon, freely the amount of leaving out by mistake is roughly constant so can make coal piling, and then a '＞a increases ventilation gap, has therefore improved the combustion intensity of upper grate.Add that flat-wave and fixed fire grate has strong combustion intensity positive feedback.The combustion intensity of whole boiler gets a greater increase.

Double-layer grate of the present invention plane undaform back firing boiler can be made vertical or horizontal.

Claims (1)

1. A kind of vertical or horizontal double-layer grate plane undaform anti-burn grate boiler is characterized in that upper strata water pipe anti-burn grate is that the plane undaform is arranged.