RU197727U1 - FUEL UNIT WITH DIRECT AND INDIRECT HEATING - Google Patents

Abstract

The utility model relates to the field of agriculture, namely, heaters for grain dryers, namely, an air heater with a burner operating on various types of fuel used in grain dryers for drying food, feed and seed grain material, legumes and oilseeds, and may be used at agricultural and grain processing enterprises in the preparation of grain for storage, as well as in animal feed, seed, cereals, flour mills, breweries and distilleries, as well as in other enterprises of the agro-industrial complex. The furnace block consists of a cylindrical body, inside of which there is a heat exchanger and a combustion chamber with a removable end cover mounted on it. The design is equipped with a chimney and an explosive valve. The removable end cap is attached to the combustion chamber using bolted connections. When drying fire-hazardous grain material, such as sunflower, rapeseed, a closed lid provides the required fire safety, the flue gases pass through the heat exchanger 5, heating the air, and are emitted through the chimney. When drying less flammable grain material, such as wheat, corn, an open lid ensures the flow of flue gases in a mixture with air heated directly in the grain material in the heat exchanger 5. The technical result of the claimed utility model is to increase the efficiency of the claimed device by combining maximum efficiency with fire safety. 1 ill.

Description

The utility model relates to the field of agriculture, namely, heaters for grain dryers, namely, an air heater with a burner that runs on various types of fuel used in grain dryers for drying food and seed grain of grain, leguminous and oilseeds, and can be used on large and small agricultural and grain processing enterprises in the preparation of grain for storage, as well as in enterprises of the agro-industrial complex.

The furnace block is known from the prior art (see RU 88784, 11/20/2009), selected as the closest analogue, consisting of a cylindrical body, inside which there is a combustion chamber with nozzles for the exit of flue gases and a two-way heat exchanger. The design is equipped with an explosive valve and a chimney. As elements of fastening and spacing, corners in contact with the shelves are used, welded in pairs and symmetrically to the walls of the heat exchanger and the combustion chamber by the second shelves, with the possibility of axial and radial movement of the structure during its thermal expansion.

The disadvantage of the closest analogue is the low efficiency when drying grain material.

High fire safety when using this device is compensated by large heat losses.

The technical result of the claimed utility model is to increase the efficiency of the claimed device, due to the combination of the maximum efficiency of the device with fire safety.

The claimed technical result is achieved by creating a furnace block, consisting of a cylindrical body, inside of which there is a heat exchanger and a combustion chamber, with a removable end cover mounted on it. The design is equipped with a chimney and an explosive valve. The end cover of the combustion chamber is attached to the combustion chamber with bolted connections, isolating the combustion products from interaction with the grain material. The closed lid of the furnace block provides the required fire safety required when drying fire-hazardous grain material, such as sunflower, rapeseed, while it has a low efficiency. The open lid of the furnace block provides the required fire safety when drying grain material, such as corn, wheat, less fire hazardous, the combustion products are not isolated from the grain material and are actively involved in the drying process, while the efficiency is increased by 15-20%.

The claimed utility model is illustrated by the following schematic representation:

FIG. 1 - general view

Referring to FIG. 1. Positions indicate the following:

1 - Burner;

2 - cylindrical housing;

3 - Combustion chamber;

4 - removable cover;

5 - heat exchanger;

6 - Air channel;

7 - Chimney;

8 - Explosion valve.

The furnace block with the possibility of direct (II) and indirect (I) heating comprises a cylindrical body 2 on which a burner 1 is installed, a combustion chamber 3, with a removable cover 4 mounted on it, a heat exchanger 5, an air duct 6. The structure is equipped with a chimney 7 and explosive valve 8.

The furnace unit with the possibility of direct (II) and indirect (I) heating works as follows.

I. Option with closed removable cover.

Fuel is burned in the combustion chamber 3 using the burner 1, the resulting flue gases are transferred from the combustion chamber 3 to the heat exchanger 5. The flue gases move through the channels of the heat exchanger 5 and heat the metal of the air channel 6. In turn, clean cold air moving through the channels 6 , is heated and fed to the mines of a grain dryer, where grain is dried. The flue gases are discharged through the chimney 7. The explosive valve is activated when the pressure in the combustion chamber rises above the permissible level, ensuring the safety of the operation of the firing block.

II. Option with open removable cover.

The fuel is burned in the combustion chamber 3 using the burner 1, the resulting flue gases are mixed with heated air and fed directly from the combustion chamber to the grain dryer.

Claims (1)

Direct and indirect heating unit, consisting of a cylindrical body, inside which there is a combustion chamber, a heat exchanger equipped with a chimney and an explosive valve, characterized in that it has a removable end cover in its design, which is attached to the combustion chamber with bolted connections .

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