Gas-phase rotary heat exchanger matched with grain drying machine

Abstract

The invention relates to a gas-phase rotary heat exchanger matched with a grain drying machine. The gas-phase rotary heat exchanger comprises a main heat exchanger and a waste heat recovery heat exchanger, which are connected in series, wherein a flue gas outlet of the main heat exchanger is connected to a tube-side inlet of the waste heat recovery heat exchanger through a flue gas pipeline; a shell-side outlet of the waste heat recovery heat exchanger is connected to a preheated air inlet of the main heat exchanger; a rotary drum-type heat exchange chamber is arranged in the middle of a housing of the main heat exchanger; air-flow distribution chambers comprise air collection chambers and air flow channels; the ends of a bundle of flue gas tubes are fixedly connected with the air collection chambers of the air flow distribution chambers at two ends of the housing respectively; the rotary drum type heat exchange chamber is provided with a rotary drum; spiral guide vanes are mounted on the inner side wall of the rotary drum; a driven gear ring is mounted on the outer side of the rotary drum; the driven gear ring is connected with a gear ring driving mechanism; drum rotation supporting mechanisms are symmetrically arranged on two sides of the driven gear ring; and magnetic fluid sealing mechanisms are arranged at the joints of the rotary drum and the gas distribution chambers. According to the gas-phase rotary heat exchanger, the heat exchange efficiency is improved by above 5%; and meanwhile cold air is preheated by residual heat of the waste heat recovery heat exchanger, so that the heat exchange gradient and the fuel consumption are reduced.

Description

1. Technical field: [0001] The invention relates to a heat exchange equipment matched with a bulk grain dryer in the northern region, in particular to a gas phase rotary heat exchanger matched with the grain dryer. 2. Background technology: [0002] Energy conservation and emission reduction is a major measure to implement the scientific outlook on development and build a harmonious socialist society. It is estimated that during the "13th Five-Year Plan" period, energy consumption per unit of GDP will be reduced by about 30%. At present, the efficiency of the vertical tube heat exchanger used in drying grain is about 70%. Especially in the northeast region, the grain drying coincides with the early winter season, and the average outdoor temperature reaches about -15°C, and the heat loss is even more serious. Therefore, improving the efficiency of energy utilization to reduce the consumption of primary energy and increase the output value of unit energy consumption is the key...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a gas-phase rotary heat exchanger matched with a grain dryer, which is used to solve the problem of low efficiency of the vertical tube heat exchanger currently used for drying grain in the north. The serious problem of heat loss

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