RU69613U1 - FIRE OF A BOILING LAYER WITH A FIRE MASS - Google Patents

Abstract

The utility model relates to energy, in particular to devices for burning wood waste in the wood processing industry. The technical task of the utility model is the expansion of the technological capabilities of the furnace, the use of various raw materials, including those with high humidity and, as a result, an increase in the efficiency of its operation. Grid-irons in the form of a hollow body are made of sections installed one after another, while two sections are located at an angle to the horizontal plane. 2 pf, 1 ill.

Description

The utility model relates to energy, in particular to devices for burning wood waste in the wood processing industry.

Known furnace for burning wood waste, which contains a loading hopper, a heat exchanger, a smoke exhauster, a vertical shaft with a perforated bottom, equipped with one or more perforated cups and a device to prevent arching. The glasses are arranged vertically and are supported by the open part on the grate. The afterburning chamber is made of an annular cross-section, it is bounded inside by the wall of a vertical shaft, on the outside by a secondary air heater, made in the form of two vertical collectors with horizontal pipe rings between them. One of the collectors is equipped with nozzles for supplying heated secondary air to the combustion chamber (RF patent No. 2134040 IPC F23G 5/24).

Also known is a device for burning solid fuel, comprising a housing in the form of a cylindrical combustion chamber equipped with a tangentially located nozzle, a gas outlet window and a grate, a fuel hopper, a fuel supply device, a blower fan, characterized in that the combustion chamber is provided with an outer coaxially arranged an air jacket and an inner cylindrical screen mounted on the gas outlet, and the fuel supply device is made in the form of an ejector installed between the nozzle and then Livni hopper, and is connected through an air blow fan shirt (RF patent for utility model №7470 IPC F23V 1/38).

The disadvantage of the above devices is the low efficiency and rapid burnout of the grate.

The closest technical solution is a fluidized bed furnace with a fire mass, which contains a combustion chamber, in the lower part of which there is an air distribution device made in the form of a hollow body with vertical nozzles, which is connected to a blower fan, and a layer of insulating material and a layer of fine fraction are laid between the nozzles material (patent for utility model of the Russian Federation No. 46557, published on July 10, 2005) - a prototype.

The technical task of the claimed utility model is to expand the technological capabilities of the furnace, the use of various raw materials, including those with high humidity and, as a result, increase its efficiency.

The technical problem is achieved in that the device contains a combustion chamber, in the lower part of which there is an air distribution device made in the form of a hollow body with vertical nozzles, which is connected to the blower fan, and a layer of insulating material is laid between the nozzles, the hollow body made of sections installed one after another, with two sections located at an angle to the horizontal plane. A feeder hopper is installed in the upper part of the air distribution device, which has the ability to supply fuel in batches.

Comparison of the proposed solutions with the prototype shows that it differs in the following features:

- the hollow body is made of sections;

- sections are installed one after another;

- sections are located at an angle to the horizontal plane;

- In the upper part of the air distribution device, a hopper-feeder is installed, which has the ability to supply fuel in batches.

Therefore, the claimed solution meets the criterion of "novelty."

The inventive utility model can be manufactured on standard equipment using well-known technological processes, therefore, it meets the criterion of "industrial applicability".

The figure schematically shows a firebox.

The device comprises a combustion chamber 1, with a grate, which is made of sections 2, 3, 4 installed one after the other, and sections 2 and 3 are installed at an angle to the horizontal plane. The sections are made in the form of hollow housings with vertical nozzles 5, between which a layer of insulating material 6 is located. Hollow housings have an air supply for fans 7 and 8. In the upper part of the combustion chamber, there is a hopper-feeder 9, which has the possibility of portioned fuel supply. Fuel to the hopper feeder 9 is fed by a scraper conveyor 10. In the lower part of the combustion chamber behind the grate, an ash pan 11 is installed.

The device operates as follows.

Fuel in the form of wood waste (sawdust, shavings, bark, wood chips) is fed by a scraper conveyor 10 to the hopper-feeder 9, which supplies fuel in batches to the red-hot section 2 of the grate, from which sharp nozzles 5 under high pressure created by fan 7 carry out sharp blowing hot air. That allows under the influence of powerful thermal radiation and sharp blast to immediately break a portion of wet fuel into small fragments,

which dry out at high speed, and, moving further down to section 3, ignite in the entire volume. In this case, hot air blowing from the nozzles is carried out both in section 3 and in section 4. The combustion of fuel occurs on the horizontal section 4, and the resulting ash is removed from the combustion chamber using an ash pan 11.

Thus, the claimed design allows you to burn fuel of various compositions with high humidity, which increases the efficiency of its work.

Claims (2)

1. A fluidized bed furnace with a fire mass containing a combustion chamber, in the lower part of which there is an air distribution device made in the form of a hollow body with vertical nozzles, which is connected to a blower fan, and a layer of insulating material is laid between the nozzles, characterized in that the hollow body made of sections installed one after the other, with two sections located at an angle to the horizontal plane. 2. The furnace according to claim 1, characterized in that a hopper-feeder is installed in the upper part of the air distribution device, which has the possibility of portioned fuel supply.