RU221796U1 - Indirect heating heat generator for grain dryer - Google Patents

Abstract

The utility model relates to heat generators used as part of devices for drying fine-grained food and seed raw materials, in particular grain, legumes and oilseeds, and can be used at agricultural enterprises when preparing grain for storage, transportation or processing.

The technical result of the claimed utility model is to increase the maintainability of the heat exchanger of an indirect heating heat generator for a grain dryer, ensuring ease of manufacture of an indirect heating heat generator for a grain dryer.

An indirect heating heat generator for a grain dryer, containing a housing, a burner, a combustion chamber, a flue gas outlet pipe and a heat exchanger, characterized in that the heat exchanger is made in the form of a separate block and is installed at the exit of the combustion chamber with the possibility of its placement in the vertical shaft of the grain dryer.

Description

The utility model relates to heat generators used as part of devices for drying fine-grained food and seed raw materials, in particular grain, legumes and oilseeds, and can be used at agricultural enterprises when preparing grain for storage, transportation or processing.

A gas air heater is known from the prior art (patent RU159497U1, IPC F24H 3/00, publ. 28/10/2064), mounted in a single housing, also containing a burner, a cylindrical combustion chamber, a flue gas exhaust pipe, and a heat exchanger made of flame tubes , installed evenly around the combustion chamber parallel to its axis.

An air heater for a grain dryer is known from the prior art (patent RU58203U1, IPC F24H 3/00, published on November 10, 2006), mounted in a single housing, also containing a burner, a combustion chamber, a flue gas exhaust pipe and a heat exchanger made in the gap between the chamber combustion and housing walls.

A combustion unit with the possibility of direct and indirect heating is known from the prior art (patent RU197727U1, IPC F26B 23/02, F24H 3/00 publ. 05/25/2020), mounted in a single housing, containing a burner, combustion chamber, flue gas exhaust pipe , heat exchanger, and adopted as a prototype.

The disadvantage of analogues and the prototype is the difficulty of repairing the heat exchanger, since usually in a heat generator its heat exchanger and combustion chamber are made as a single unit and are placed in grain dryers in a limited space directly in front of the vertical shaft of the grain dryer, as a result there is no way to get close only to the heat exchanger, and in case of breakdown the heat exchanger has to be disassembled and the entire heat generator taken out and sent to the manufacturer for repairs.

Grain dryers use a vertical shaft into which heated air passes through a heat exchanger. Heated air is supplied to dry the grain. The space of the vertical shaft is used only for the passage and direction of heated air.

The technical result of the claimed utility model is to increase the maintainability of the heat exchanger of an indirect heating heat generator for a grain dryer, ensuring ease of manufacture of an indirect heating heat generator for a grain dryer.

The specified technical result is achieved due to the fact that in an indirect heating heat generator for a grain dryer, containing a housing, a burner, a combustion chamber, a flue gas outlet pipe and a heat exchanger, according to the utility model, the heat exchanger is made in the form of a separate block and is installed at the outlet of the combustion chamber with the possibility of placement in the vertical shaft of a grain dryer.

In an indirect heating heat generator for a grain dryer, the heat exchanger can be installed at the outlet of the combustion chamber via a pipe.

Making the heat exchanger in the form of a separate block and fixing it at the outlet of the combustion chamber with the possibility of placing it in the vertical shaft of the grain dryer allows, if necessary, to dismantle only the heat exchanger or its elements, and there is no need to dismantle and send the entire heat generator to a plant that carries out maintenance and repair of this design of heat generators, which increases the maintainability of the heat exchanger, and, as a consequence, the entire heat generator.

Also, fixing the heat exchanger at the outlet of the combustion chamber with the possibility of placing it in the vertical shaft of the grain dryer makes it possible to simplify the design of the heat exchanger and ensure ease of manufacture of the entire heat generator by eliminating from the design the body parts that create the heated air supply channel, since their function is performed by the walls of the vertical shaft of the grain dryer, which also increases the maintainability of the heat generator.

The utility model is illustrated by drawings, where in Fig. An indirect heating heat generator for a grain dryer is presented, which contains a housing 1, a burner 2, a combustion chamber 3, a flue gas outlet pipe 4 and a heat exchanger 5, which is made in the form of a separate block and is fixed at the outlet of the combustion chamber 3 and is located inside the vertical shaft 6 of the grain dryer.

Heat exchanger 5 of the heat generator can be installed at the outlet of the combustion chamber using a pipe (position not shown in Fig.).

Burner 2 heats the walls of the combustion chamber 3. Combustion products pass through the heat exchanger 5, made in the form of a separate block installed at the outlet of the combustion chamber 3 and placed in the vertical shaft 6 of the grain dryer, heat it and are discharged through the flue gas exhaust pipe 4. Atmospheric air first is fed into the gap between the combustion chamber 3 and the housing 1, where, removing heat from the walls of the combustion chamber 3, it heats up. The atmospheric air heated in this way then enters the vertical shaft 6 of the grain dryer, where, removing heat from the heat exchanger 5 installed in the vertical shaft 6, it is heated to the required temperature. Next, the heated air moves directly to the product being processed in the grain dryer.

In the event of a breakdown of the heat exchanger 5, made in the form of a separate block and installed at the outlet of the combustion chamber 3 and located in the vertical shaft 6 of the grain dryer, or the breakdown of one or more elements of the heat exchanger 5, it is possible to dismantle only the heat exchanger or its elements from the vertical shaft 6 of the grain dryer, if In this case, there is no need to dismantle and send the entire heat generator to a plant that carries out maintenance and repair of this design of heat generators, which increases the maintainability of the heat exchanger, and, as a result, the entire heat generator.

Claims (2)

1. An indirect heating heat generator for a grain dryer, containing a housing, a burner, a combustion chamber, a flue gas outlet pipe and a heat exchanger, characterized in that the heat exchanger is made in the form of a separate block and is installed at the exit of the combustion chamber with the possibility of its placement in the vertical shaft of the grain dryer. 2. An indirect heating heat generator for a grain dryer according to claim 1, characterized in that the heat exchanger is installed at the outlet of the combustion chamber through a pipe.