Isolated preheating device of granular material

Abstract

The invention discloses an isolated preheating device of a granular material. The device is characterized in that a preheating tube array is installed in the middle of a shell; an upper raw material chamber is located on the upper part of the shell, and a lower raw material chamber is located on the lower part of the shell; an upper gas collecting chamber is arranged between the preheating tube array and the upper raw material chamber, and a lower gas collecting chamber is arranged between the preheating tube array and the lower raw material chamber; the upper part of the upper raw material chamber is provided with a volatile matter outlet; a feeding auger and an eccentric up-and-down motion mechanism are located on the upper part of the upper raw material chamber; the upper and lower gascollecting chambers are communicated by the preheating tube array; a discharging auger is located at the bottom of the lower gas collecting chamber; the upper gas collecting chamber is provided with multiple upper raw material portholes; the lower gas collecting chamber is provided with lower raw material portholes corresponding to the upper raw material portholes; the lower gas collecting chamber is provided with a smoke inlet, and the upper gas collecting chamber is provided with a smoke outlet; the upper raw material portholes are communicated with the lower raw material portholes through a shell layer; a first motor is fixed on the lower part of the shell and connected with the discharging auger; and multiple up-and-down motion rods are installed on the eccentric up-and-down motion mechanism through a bracket. The device has low cost and high heat efficiency, is stable to operate and is simple to manipulate.

Description

technical field [0001] The invention belongs to the heating technology of granular materials, and in particular relates to a device for preheating granular materials by using the residual heat of combustion flue gas. Improve the energy conversion efficiency of biomass gasification. Background technique [0002] At present, improving energy efficiency is a common goal. With the continuous reduction of non-renewable energy, more and more biomass energy has been used, among which biomass gasification is a hot spot. [0003] Chinese patent document (patent number: ZL 190619147570.2) discloses "a cracking gasification reformer", which mainly includes a dust cloud combustion chamber, a cracking gasification chamber and a catalytic reforming chamber. The micron fuel enters the dust cloud combustion chamber and burns efficiently, providing the required heat source for cracking gasification and catalytic reforming. [0004] Its advantages are: ① It has the function of continuous f...

AI Technical Summary

Problems solved by technology

[0006] At present, the waste heat devices for materials such as biomass mainly include horizontal tube bundles and horizontal drums. The disadvantages are: 1. During operation, the flue gas flows into the horizontal tube bundles and horizontal drums, and the tube bundles and drums rotate as a whole under the drive of the motor. , to drive the entire equipment to move, the motor consumes a lot of energy; 2. Since the heating heat source directly passes through the hollow rotating shaft of the tube bundle heating device, the temperature of the heating heat source should not exceed 300°C, and for 700°C 3. The heat source inlet is connected to the bearing, and the bearing is easy to transfer heat to the foundation support, so the heat source loss is serious; 4. After the flue gas passes into the horizontal tube bundle and horizontal drum, the equipment expands due to heat And become longer, and the foundation supports on both sides are fixed, the expansion of the equipment and the foundation is not synchronized, and the long-term work will damage the equipment and the foundation supports

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