High-temperature switching device for sampling flow paths for multiple organic pollutants in incineration flue gas

Abstract

The invention relates to a high-temperature gas sampling technology, and aims to provide a high-temperature switching device for sampling flow paths for multiple organic pollutants in incineration flue gas. The device comprises at least two high-temperature-resistant ball valves each with one end connected to a sampling port in a flue and the other end connected with a gas analyzer, and at least two motors each with the output end connected with a valve rod of one high-temperature-resistant ball valve through a coupler. A heat preservation cavity provided with the high-temperature-resistant ball valves and a heating device, and a non-heat-preservation cavity provided with the motors and a motor control module are arranged in the device shell. The device is simple in structure and concise in layout. The heating device, the temperature sensor and the high-temperature-resistant ball valves are arranged in the heat preservation cavity, constant-temperature heating of the ball valves can be achieved, and the problem caused by uneven heating is effectively solved. Meanwhile, heat dissipation is reduced, and energy consumption is reduced. The motors and the motor control module are arranged in the non-heat-preservation cavity, on the premise that it is guaranteed that the motors are not affected by high temperature, on-off control over the high-temperature-resistant ball valves can be achieved, and then automatic switching is achieved according to needs.

Description

technical field [0001] The invention relates to high-temperature gas sampling technology, in particular to a high-temperature switching device for sampling flow paths of various organic pollutants in incineration flue gas. Background technique [0002] Incineration is the main way of solid waste and garbage disposal, and the organic pollutants (benzene, naphthalene, chlorobenzene and dioxin, etc.) produced by solid waste incineration have attracted much attention. Based on the above requirements, the inventor team once proposed a simultaneous online detection technology for multiple organic pollutants in the flue gas, by exploring the emission of inorganic pollutants and trace organic pollutants such as benzene, naphthalene, chlorobenzene, and dioxins in the flue gas Process characteristics, analyze the influence of temperature, humidity, flow rate, pressure and other factors; adopt high-efficiency continuous non-destructive sampling and transmission, no time blind spot conc...

AI Technical Summary

Problems solved by technology

However, the current high-temperature switching valves commonly used in the market have the following defects: usually a single valve; need to wind heating wire heating; need manual switch

The single valve has scattered valve body layout; the heating wire heating has uneven heating and winding, which is easy to form condensation points and affects the detection accuracy; manual switch valves cannot meet the needs of continuous operation of the equipment

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