Coal fired chain grate hot-blast stove and application thereof

Abstract

The invention provides a coal fired chain grate hot-blast stove. The coal fired chain grate hot-blast stove comprises a combustion chamber, a chain grate and a heat exchanger. The hot-blast stove is a horizontal stove; a combustion fan is arranged below one fuel adding end of the chain grate; a deslagging machine is mounted below the other end of the chain grate; the heat exchanger is a tube type clean air heat exchanger; a tube pass of the heat exchanger is a clean air channel; a smoke outlet and a clean air outlet are formed in the stove wall of the same side of the hot-blast stove; the smoke outlet is sequentially connected with a cyclone dust collector, a water dust scrubber, a smoke guiding fan and a chimney through pipelines. The coal fired chain grate hot-blast stove is simple in structure and convenient to operate by workers, the combustion chamber temperature is easy to control, and temperature fluctuation of hot air generated by the clean air heat exchanger is stable.

Description

technical field [0001] The invention belongs to the field of combustion equipment, and in particular relates to a combustion equipment used for drying medicine and its application. Background technique [0002] Ascorbic acid-2-phosphate is a white or light yellow solid, odorless, slightly acidic, easily soluble in water, and is a stable animal feed additive. The industrial synthesis of ascorbic acid-2-phosphate is to carry out phosphorylation reaction with raw materials of vitamin C powder, sodium trimetaphosphate, and lime milk. After the reaction, the reaction mixture is dried with hot air to obtain powdered ascorbic acid-2-phosphate . [0003] At present, the production of ascorbic acid-2-phosphate by airflow drying in the industry mainly adopts steam preheating and electric heating tube to assist supplementary heating, so that the clean air can reach 200-230°C as the heat source, so as to achieve the purpose of drying the material. This method needs to burn coal into s...

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Problems solved by technology

[0003] At present, the production of ascorbic acid-2-phosphate by airflow drying in the industry mainly adopts steam preheating and electric heating tube to assist supplementary heating, so that the clean air can reach 200-230°C as the heat source, so as to achieve the purpose of drying the material. This method needs to burn coal into steam through a steam boiler and then transport it to the heat exchanger of the dryer as preheating. The temperature of the 0.6-0.7Mpa steam produced by the boiler is 140-150°C, and then supplemented by electric heating tubes to make it clean. If the air temperature is raised to 220-230°C, such a drying method requires a large amount of labor, and the thermal efficiency of coal combustion cannot be brought into play. It also causes waste of energy for auxiliary heating of the electric heating tube, and consumes a lot of energy.

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