SU897681A1 - Method of heating-up frozen soils - Google Patents

Description

(54) WAY OF WARMING UP DEADLESS CARGOES

one

The invention relates to auxiliary methods for loading and unloading operations and can be used to restore the flowability of crutches in freight wagons, such as ore and building materials, flux, crushed stone.

There is a method of warming up frozen cargoes, which means that the cargo is placed in a convective-type garage and is supplied with coolant. According to this method, the heating is performed with increased thermal loads. In the initial warm-up period when the car is cold, in order to reduce the time it takes for the sections to reach a temperature range of 130 ° C, the maximum possible amount of heat is supplied. The consumption of natural gas is up to 8800, the time for the temperature of the nodes to reach the maximum permissible level is 1.5 hours.

However, the known method is limited by the maximum thermal load, and when the combustion devices operate in forced modes, it leads to the destruction of the masonry masonry. With a continuous exit to the temperature mode of heating 130 ° C

in the section) 1 -1.5 hours, overheating of individual units of the cars may occur.

The aim of the invention is to reduce the duration of heating and increase the intensification of heat exchange processes.

This goal is achieved by the fact that a pulsed coolant with a temperature of 400-600 ° C and a speed of 250-300 m / s is additionally supplied to the chamber.

The method of heating is carried out as follows.

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After setting the cars and closing the open gate, the main burners are ignited and coolant is fed into the heating chamber through the lower nozzles and the ganers, and at the same time it starts up, for example, the jet engine. During the propagation of a jet of coolant from a jet engine, secondary flows are organized in the chamber, flowing around the walls of the cars and the exposed surfaces of the heated cargo, which intensifies 20 heat exchangers. The resulting vortex zones inside the body reduce the thermal resistance of the boundary layer over the heated load. Submission

a heat carrier with a higher potential reduces the time for the section to reach a temperature of 130 ° C in 3-6 minutes, after which the engine is automatically turned off and warming up is continued due to the heat energy of the heat transfer medium from the stationary installation. When the section temperature drops to 70-80 ° C, the jet engine is restarted. Thus, due to the additional supply of coolant to the chamber and the intensification of heat exchange, the warm-up time is reduced by an average of two hours, which allows the delivery time of cars to the garage to be increased to 8-12 hours. The total savings from the implementation of the invention is more than 300,000 rubles.

Claims (1)

Invention Formula The method of heating the frozen cargo is that the cargo is placed in a convective type garage, and a coolant is supplied, characterized in that, in order to reduce the duration of heating and increase the intensification of heat exchange processes, coolant is additionally pulsed into the chamber at a temperature of 400-600 ° C and speed of 250-300 m / s. Sources of information taken into account in the examination 1. "Industrial Transport, 1976, No. 2, p. 21 (prototype).