High-temperature waste gas washing device and implementation method thereof

Abstract

The invention relates to a high-temperature waste gas washing device and an implementation method thereof. The high-temperature waste gas washing device comprises a waste gas purification tower, a spraying mechanism arranged on the waste gas purification tower, a water collecting well communicated with the spraying mechanism, and a sedimentation circulation pool communicated with the waste gas purification tower, and the sedimentation circulation pool is communicated with the water collecting well. The waste gas purification tower, the spraying mechanism, the water collecting well and the sedimentation circulation pool form a heat preservation water circulation system, on one hand, sprayed water of the spraying mechanism is kept at the temperature roughly the same as that of high-temperature waste gas, the sprayed water can be heated through an external heat source when necessary, on the other hand, the high-temperature waste gas is washed through the high-temperature water of the spraying mechanism, dust in the high-temperature waste gas can be washed out through the high-temperature water, a large amount of gasification latent heat is still reserved in the high-temperature waste gas, conditions are created for subsequent waste gas heat recovery, and meanwhile a large amount of condensation waste water can be prevented from being generated in the high-temperature waste gas washing process.

Description

technical field [0001] The invention relates to the technical field of high-temperature exhaust gas washing, in particular to an improvement of a high-temperature exhaust gas washing device and its implementation method. Background technique [0002] In the waste treatment industry, especially the drying industry (including the treatment of sludge, wood, fruits and vegetables, industrial waste residues, etc.), while drying the waste, a large amount of waste gas (the waste gas) generated in the drying process will be produced It is not dry, but the waste gas rich in water vapor is produced during the drying process), and the composition of the dried waste gas is complex, including air, water vapor, dust and trace volatile organic gases, etc. Among them, water vapor contains a large amount of latent heat of vaporization, which is basically close to the energy consumed in the drying process. If this heat is to be recovered, heat exchange is required, but since the exhaust gas ...

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Problems solved by technology

[0003] In the prior art, the dedusting process of washing and spraying the exhaust gas is usually sprayed with normal temperature water to wash out the dust in the exhaust gas. In this way, because the dust washing process is lower than the temperature of the exhaust gas, the heat energy of the exhaust gas will be reduced. The heat is exchanged into the washing water, and the low temperature causes the water vapor in the exhaust gas to condense, which further loses the carrier of heat energy. What is more serious is that the exhaust gas washing process of the prior art not only consumes a large amount of water, but also because of the condensed water It will condense, which will further increase the amount of sewage generated after dust cleaning, which will increase the difficulty of subsequent sewage treatment, and almost make it impossible to clean the exhaust gas according to the standard requirements.

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