RU63034U1 - HEATER WITH LOW-TEMPERATURE VORTEX COMBUSTION - Google Patents

Abstract

The utility model relates to heat engineering and can be used in industrial energy boilers burning fuel with a high windage. The technical effect of the proposed utility model is that the design of the furnace provides for complete burnout of the fuel, which means that its environmental friendliness is increased. The technical effect is achieved by the fact that the furnace is equipped with only two tiers of nozzles, the lower and upper, and the lower tier is represented by two slotted rectangular nozzles, and the upper tier is located in the pinch of the rear wall, in addition, the lower part of the walls of the furnace is covered with fireclay brick, so that they form a slope to the horizontal: frontal at 60 °, rear at 45 °, below 10 °.

Description

The utility model relates to heat engineering and can be used in industrial energy boilers burning fuel with a high windage.

An analogue of the proposed utility model is a furnace for low-temperature vortex combustion of coarse-ground fuel (Methodological guidelines for the design of furnace devices for power boilers, St. Petersburg, 1996, developed by VTI and AOOT NPO TSNTI by a team of authors, pp. 138-140), containing a furnace a prismatic chamber, in which the front and rear screens in the lower (vortex part) have front and rear aerodynamic protrusions. The lower part of the combustion chamber is made of gas-tight screen panels. The lower blast nozzles are installed under the rear screen protrusion.

The design of such a furnace does not allow to organize sufficiently the burning of fuel with high windage in a whirlwind. Part of the fuel remains unburned.

As a prototype of the proposed utility model "The furnace with a low-temperature vortex combustion" adopted low-temperature

a vortex shielded firebox for burning solid fuel, which has a high windage according to RF patent No. 2251641, which includes front, rear and side screens, on the respective walls of the firebox, the firebox is divided into lower and upper chambers, air blast nozzles are installed in the lower chamber, made in in the form of ovals, they are installed in longitudinal rows sequentially between the pipes of the front, hearth and rear screens, and the nozzles of each longitudinal row are installed in one vertical plane, and on the side walls of the furnace in e boundary between the lower and upper chambers installed additional blowing nozzles final afterburning under coated fireclay bricks.

The disadvantage of this design is that it does not allow the formation of a vortex, providing complete burnout of fuel, because The jet of air from many nozzles has an increased resistance. Ultimately, unburned fuel and large emissions of nitrogen oxides remain.

The technical effect of the proposed utility model is that the design of the furnace provides for complete burnout of the fuel, which means that its environmental friendliness increases.

The technical effect is achieved by the fact that the furnace is equipped with only two tiers of nozzles, the lower and upper, and the lower tier is represented by two slotted rectangular nozzles, and the upper tier is located in the pinch of the rear wall, in addition, the lower part of the walls of the furnace is closed

fireclay bricks so that they form a slope to the horizontal: front 60 °, rear 45 °, below 10 °.

This design delivers air into the furnace in stages, and a stepwise air supply allows you to have a low temperature of the vortex and, as a result, low emissions of nitrogen oxides into the atmosphere, in addition, the vortex returns unburned fuel particles to burn.

The drawing shows the design of the furnace.

A furnace with a low-temperature vortex burning includes: front 1, rear 2, side 3 walls covered with gas-tight screens, under 4. Front 1, rear 2 walls, side walls 3 and under 4 are covered with fireclay brick 5. Burners are located on front wall 1 6. On the back wall 2, pinch 7 is made, on which the upper tier 8 of the nozzles is located. The lower tier 9 of the nozzles is located on the lower part of the front wall 1.

To describe the operation of the furnace as a type of fuel, consider a husk. The furnace works as follows. In the operation mode of the burners 6 on gas, they are kindled, while air is supplied only through the nozzles of the burners 6, while the nozzles of the lower tier 9 and the upper tier 8 are closed. When the required gas temperature is reached, the nozzles of the lower tier 9 on the lower part of the front wall 1 of the furnace and the upper tier 8 on the clamp 7 of the furnace are opened and the air supply through these nozzles is gradually increased, followed by an increase in husk supply. The design of the burners 6 provides the dispersion of husks in the volume of the furnace.

Since the husk has a heterogeneous fractional composition, larger and heavier particles fall on it under the 4 fireboxes, covered by fireclay brick 5, and burn out on it. The location of the nozzles 9 on the lower part of the front wall 1 of the furnace allows a directed stream of air to blow under 4 and carry the dying husk into the furnace volume. The presence of the lining in the lower part of the furnace 3, and its inclination allow to maintain stable combustion in the volume of the furnace.

Claims (1)

A furnace with a low-temperature vortex burning, containing front, rear and side walls, closed by horizontal screens, under, a burner and tiers of nozzles, characterized in that the furnace is equipped with only two tiers of nozzles, lower and upper, and the lower tier is represented by two slot-like rectangular nozzles, and the upper the tier is located in the rear wall pinch, in addition, the lower part of the furnace walls is covered with fireclay bricks, so that they form a slope to the horizontal: front 60 °, rear 45 °, 10 ° below.