RTO waste gas treatment system and method adopting electric heating

Abstract

The invention provides an electrical heating RTO waste gas treatment system and method.The system comprises an adsorption unit, an RTO direct combustion furnace, a desorption unit and an exhaust funnel, a VOCs waste gas inlet header pipe is connected to a VOCs concentration detector, the VOCs concentration detector is connected to the adsorption unit through an adsorption pipeline and connected to the RTO direct combustion furnace through a first gas inlet pipeline, and the adsorption unit is connected to the desorption unit through a second gas inlet pipeline; the adsorption unit is connected to the exhaust funnel through an adsorption unit exhaust pipeline, and a main exhaust fan is arranged on the adsorption unit exhaust pipeline; the RTO direct combustion furnace is connected to the exhaust funnel through an RTO exhaust pipeline, and a direct combustion fan is arranged on the RTO exhaust pipeline; the desorption unit is connected to the adsorption unit through a desorption pipeline, and the adsorption unit is connected to the RTO direct combustion furnace through a second gas inlet pipeline; a plurality of silicon carbide rods are arranged in a combustion chamber of the RTO direct combustion furnace and provide combustion temperature for the combustion chamber; the system further comprises a PLC (Programmable Logic Controller) control device for controlling each working condition.

Description

technical field [0001] The invention relates to an RTO waste gas treatment system and method using electric heating, and belongs to the technical field of organic waste gas treatment. Background technique [0002] Volatile Organic Compounds (VOCs) usually refer to organic compounds with a saturated vapor pressure greater than 70Pa at room temperature and a boiling point below 260°C at normal pressure, or with a vapor pressure greater than or equal to 10Pa and volatile at 20°C. of all organic compounds. VOCs form fine particulate matter (PM2.5), ozone (O 3 ) and other important precursors of secondary pollutants, which in turn lead to atmospheric environmental problems such as haze and photochemical smog. [0003] Regenerative combustion (RTO) technology is a common technology in the treatment of organic waste gas. The exhaust gas is first heated to a temperature close to the thermal oxidation temperature by the regenerator, and then enters the combustion chamber for therm...

AI Technical Summary

Problems solved by technology

However, some users are far away from the natural gas pipeline network, and there are problems such as the need to go through relevant account opening procedures and pay expensive account opening fees, so electric heating is used instead

[0005] However, in the RTO device using electric heating in the prior art, since the finned alloy material resistance wire is used, the thermal oxidation temperature in the RTO device usually needs to be about 800°C, and the metal resistance wire will generate heat when heated to such a high temperature. Oxidation and large thermal deformation lead to short circuit or open circuit, and the heating element must be installed on the top of the combustion chamber, and the finned electric heating wire will cause dangers such as bending and falling; furthermore, due to the high temperature operation of the metal resistance wire, resulting in Part of the heat is transferred to the external heating box, and the external heating box will also cause a circuit break due to insufficient heat dissipation, so the existing RTO devices that use electric heating have relatively large safety hazards

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