Low-temperature pyrolysis unit

Abstract

This invention relates to a low-temperature pyrolysis apparatus, comprising a feeding element, a heating device, a first-stage heating space, a second-stage heating space, a discharging element, a cooling device, a gas supply device, a gas inlet element, a gas outlet element, and a control device. When dioxin treatment is to be performed on waste material, the waste material is fed into the heating device through the feeding element and controlled by the control device. It undergoes preliminary heating in the first-stage heating space to generate a first temperature, and then undergoes final heating in the second-stage heating space to generate a second temperature. Finally, it reaches the cooling device through the discharging element for cooling and to generate a third temperature. Simultaneously, the gas supply device provides non-oxidizing gas through the gas inlet element and discharges gas containing oxygen, nitrogen, and water vapor through the gas outlet element, creating a near-oxygen-free environment within the heating and cooling devices. This allows the dioxins in the waste material to undergo a pyrolysis reaction and be destroyed in a short time, improving processing efficiency and reducing costs.

Claims

1. A low-temperature pyrolysis apparatus, comprising: A feeding element for receiving waste material; a heating device disposed on one side of and connected to the feeding element, the heating device comprising: a first-stage heating space for preheating the waste material to a first temperature; a second-stage heating space disposed on one side of and connected to the first-stage heating space for final heating of the waste material passing through the first-stage heating space to a second temperature greater than the first temperature; a discharging element disposed on one side of and connected to the second-stage heating space for discharging the waste material; a cooling device disposed on one side of and connected to the discharging element for cooling the waste material to a third temperature less than or equal to the first temperature; a gas supply device comprising at least one inlet element and one outlet element, the inlet element being connected to the second-stage heating space and the cooling device, the outlet element being connected to the first-stage heating space; and a control device connected to the heating device, the cooling device, and the gas supply device.

2. The cryogenic pyrolysis apparatus as described in claim 1, wherein the cooling apparatus has a coolant inlet element, a cooling space is provided on one side of the coolant inlet element and the cooling space is connected to the coolant inlet element, and a coolant outlet element is provided on one side of the cooling space and the coolant outlet element is connected to the cooling space.

3. The cryogenic pyrolysis apparatus as described in claim 1, wherein a first oxygen content sensing element is provided in the second stage heating space.

4. The cryogenic pyrolysis apparatus as described in claim 1, wherein the cooling apparatus is provided with a second oxygen content sensing element.

5. The cryogenic pyrolysis apparatus as described in claim 1, wherein the gas supply device supplies non-oxidizing gases.

6. The low-temperature pyrolysis apparatus as described in claim 1, wherein the first temperature system is 150°C to 300°C.

7. The cryogenic pyrolysis apparatus as claimed in claim 1, wherein the second temperature is at most 600°C.

8. The cryogenic pyrolysis apparatus as described in claim 1, wherein the third temperature is less than or equal to 150°C.

9. The cryogenic pyrolysis apparatus as claimed in claim 1, wherein the waste material passes through the first stage heating space, the second stage heating space and the cooling device in a time of 1 hour to 2 hours.

10. The cryogenic pyrolysis apparatus as claimed in claim 1, wherein the oxygen content of the second-stage heating space is less than 1% before the waste material enters the second-stage heating space.

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