Tunnel type hot air stove blowing torch

Abstract

A blow tube of a tunnel type hot blast stove comprises a horizontal communicating tube, a vertical electromagnet and stop pieces. The stop piece is in a right-angled-n shape and comprises a horizontal round iron plate and two vertical square ceramic plates. The two square plates move up and down in double grooves of the communicating tube. The distance between the downstream groove and the air outlet end of the communicating tube in the air flowing direction is 10 mm-20 mm. The electromagnet is perpendicularly and fixedly arranged over the air outlet end of the communicating tube. The extension line of the center line of the electromagnet passes the center of the round plate of the stop piece and is perpendicular to the central axis of the communicating tube. The electromagnet and a combustion fan power line are connected in parallel and connected into a 220V alternating-current power source wiring hole in a curing room controller, wherein the 220V alternating-current power source wiring hole is used for connection of a combustion fan. When the electromagnet is electrified, the bottom edges of the square plates of the stop piece rise to the highest position of the inner cavity of the communicating tube instantly. When the electromagnet is powered off, the bottom edges of the square plates of the stop piece fall back to the lowest position of the inner cavity of the communicating tube instantly. The blow tube can be applied to a tobacco curing tunnel stove with in-stove combustion being controlled through intermittent air supply. According to the blow tube of the tunnel type hot blast stove, a draught fan operates stably, and the hidden danger that the draught fan is burned out because the temperature rises and a high-temperature airflow is leaked is avoided.

Description

technical field [0001] The invention belongs to a tunnel-type heating furnace and an auxiliary air-supply device for a combustion-supporting fan of a hot-blast stove, in which a small amount of combustion-supporting air is supplied intermittently to control the combustion and heat supply in the furnace, and particularly relates to a tunnel-type hot-blast stove torch for a tobacco leaf curing factory. Background technique [0002] Due to the advantages of one-time coal charging and no need to watch the fire to add coal in the middle, the tunnel furnace is more and more popularized and applied in tobacco leaf curing factories. A small amount of combustion-supporting air is intermittently supplied to the tunnel furnace to maintain the furnace temperature required for tobacco leaf curing. The 1100-1300°C high-temperature combustion area in the furnace is adjacent to the combustion-supporting fan. The high-temperature area and the fan air outlet are only separated by a cast iron ...

AI Technical Summary

Problems solved by technology

Practice has shown that it is very difficult to design a baffle with low cost, can be lifted by small flow of combustion air, has good heat insulation performance, flexible operation, and good sealing and windproof performance, and has to be simplified to a thin metal plate in practical application

Non-metal refractory baffles usually have the disadvantages of bulkiness and inflexible rotation

Because all the leaked high-temperature airflow hits and corrodes the baffle at high speed, the baffle is prone to high-temperature deformation and burning, and more importantly, the metal hinge is prone to high-temperature deformation and burning and loses rotation flexibility.

The baffle cannot prevent the heat conduction to the fan coil, and the motor of the combustion-supporting fan will burn out if there is no air supply for a long time

Images