Tube type and heat storage type combined heat exchanger based on high-low-temperature segmented heat exchange

Abstract

The invention discloses a tube type and heat storage type combined heat exchanger based on a high-low-temperature segmented heat exchange. The heat exchanger comprises a tube type heat exchanger body and a heat storage heat exchange body, wherein the tube type heat exchanger body enables flue gas flowing outside a tube to flow along an S-type path through a partition board, air flowing in the tube also flows along the S-type path and opposite to the direction of the flue gas so that violent heat exchange between the flue gas in the tube type heat exchanger body and the air can be achieved, the utilization rate of heat is improved, and the flue gas flows away from the tube type heat exchanger body when the temperature of the flue gas is higher than a dew point temperature; the heat storage type heat exchanger body comprises four heat storage cylinders which are provided with heat storage bodies and made of ceramic, heat exchange between flue gas flowing outside the cylinders and air flowing in the cylinders enables the temperature of the flue gas to be lower than the dew point temperature, corrosion is caused, ceramics has strong corrosion resistance so that the heat exchanger can have anti-corrosion performance, and the ceramics has good heat storage capacity so that fluctuation of air flow temperature can be effectively prevented and stability of the air flow temperature can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of heat exchange and transfer, and relates to a tube-tube and regenerative combined heat exchanger based on high-low temperature segmental heat exchange, and is especially suitable for heat exchangers inside barns, ovens, and drying rooms. Background technique [0002] At present, the cost of using domestic ovens is still very high. Coal is the main fuel for baking flue-cured tobacco in my country. In the situation of energy shortage and rising fuel prices, it is particularly important to improve the utilization rate of energy. As one of the key equipment in the heating system of the curing barn, the performance of the heat exchanger directly affects the quality of tobacco leaf curing and the unit energy consumption. [0003] At present, the domestic heat exchangers used for baking in the barn mainly have the following problems: (1) The efficiency of the heat exchanger is not high, which makes the amount of...

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Problems solved by technology

[0003] At present, the domestic heat exchangers used for baking in the barn mainly have the following problems: (1) The efficiency of the heat exchanger is not high, which makes the amount of coal used for baking large, which greatly increases the cost of using the barn, making Tobacco farmers' income decreases

(2) Dust is adsorbed on the inner wall of the heat exchanger, which greatly increases the heat transfer resistance and reduces the heat transfer efficiency of the heat exchanger sharply

(3) When the flue gas exchanges heat in the heat exchanger, the temperature of the flue gas may be lower than the dew point temperature, resulting in corrosion problems. The heat exchanger has poor anti-corrosion ability, which greatly reduces the service life of the heat exchanger

(4) The output temperature is unstable and fluctuates greatly. The barn has very high requirements for temperature control and stability. The temperature is unstable and fluctuates too much, which will greatly affect the quality and quality of flue-cured tobacco curing.

(5) It is difficult to clean the heat exchanger, the flue gas flows in the pipe, and the dust in the flue gas adheres to the wall of the inner pipe, so it is difficult to clean the dust

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