High temperature flue gas filter device

Abstract

The invention discloses a high-temperature flue gas filtering device, which comprises a filtering device shell, a filter element mounting plate is arranged inside the filtering device shell, and the inside of the filtering device is separated by a filter element mounting plate and several filter elements mounted on the filter element mounting plate It is a clean gas chamber and a raw gas chamber, the raw gas chamber is provided with an inlet of high-temperature flue gas to be filtered, the clean gas chamber is provided with a filtered gas outlet, and the inside of the raw gas chamber is provided with a first heating device, and / or the inside of the clean air chamber is provided with a second heating device, which heats the high-temperature flue gas entering the filter device through the present invention, preventing condensation of high-temperature flue gas in the filter device, tar precipitation, film sticking of the filter element, or high-temperature flue gas phase Variation phenomenon, thereby ensuring the filtering effect of high-temperature flue gas, and prolonging the service life of the filter element in the filtering device.

Description

technical field [0001] The invention relates to the field of high-temperature flue gas filtering, in particular to a high-temperature flue gas filtering device. Background technique [0002] General high-temperature flue gas is very sensitive to ambient temperature changes. Sensitivity to temperature usually means that since the flue gas comes out of the high-temperature kiln, the temperature is relatively high, generally above 200°C, once the temperature drops, condensation, tar precipitation or phase change will easily occur. Therefore, when the traditional high-temperature flue gas filtering device filters the above-mentioned flue gas, condensation, film paste, and phase change often occur. The life of the filter element is shortened, and this problem has always been a technical difficulty that is difficult to overcome in the field of high-temperature flue gas filtration. [0003] In order to solve the problems of dew condensation and tar precipitation during the high-t...

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Problems solved by technology

Therefore, when the traditional high-temperature flue gas filtering device filters the above-mentioned flue gas, condensation, film paste, and phase change often occur. The life of the filter element is shortened, which has always been a difficult technical difficulty in the field of high-temperature flue gas filtration

[0004] The applicant has found in practice that the above-mentioned filter device with a jacket has the following problems: first, because the jacket is arranged on the outside of the filter device, the heat medium needs to pass through the filter device shell to transfer heat to heat, and the internal flue gas, therefore The heating process of the internal flue gas is very slow, and the heat energy is lost during the transfer process, resulting in a decrease in thermal efficiency; second, the internal flue gas is heated unevenly, and the temperature gradually decreases from the shell of the filter device to the interior of the filter device, which will still lead to condensation and tar precipitation Third, the filter device has high requirements for heat preservation, and it needs to be equipped with a corresponding heat medium supply system and fan circulation system, which increases the area occupied by the device and the difficulty of construction, and increases the cost of high-temperature flue gas filtration to a certain extent

[0005] For example, the yellow phosphorus furnace gas itself is very sensitive to temperature. The yellow phosphorus furnace gas coming out of the yellow phosphorus furnace is generally higher than 350 ° C. During the filtering process, condensation and tar precipitation will occur if the temperature changes slightly. Whether to control the above problems is a crucial point that affects the filtration effect of yellow phosphorus furnace gas. When using a jacketed filter device to filter yellow phosphorus furnace gas, condensation and tar precipitation will still occur, which will cause the filter element to stick to the film, resulting in The final filtering effect is not ideal

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