Method for treating high-temperature oil sludge waste gas

Abstract

The invention relates to a method for treating high-temperature oil sludge waste gas. The method comprises the following steps: firstly, the unstructured oil sludge waste gas in the production processis captured to form structured flue gas, the flue gas is sent to a flue, at the same time, preheated treatment powder is sprayed into the flue to make the powder be in full contact with the oil sludge waste gas to form mixed gas, solid particles with a particle size of 10 [mu]m or more in the mixed gas are firstly removed by a gravity dust collector to preliminarily reduce the solid particle content, and finally, the waste gas is sent to a high-temperature filter type dust collector to further remove fine particles, wherein the high-temperature filter type dust collector adopts a high-temperature resistant film-coated filter tube or film-coated filter bag. The method has the following advantages: the method is suitable for treatment of the oil sludge waste gas with a small emission, a high flue temperature, high humidity and a high methane total hydrocarbon concentration, and can guarantee the treatment effect under the condition that the temperature loss of the oil sludge waste gas is minimized, and the treated waste gas can enter waste-heat utilization in a subsequent process, so that the energy utilization efficiency is improved.

Description

technical field [0001] The invention relates to a method for treating high-temperature oil sludge waste gas. Background technique [0002] Iron and steel, petrochemical, organic chemical and other industries will produce a large amount of sludge mixture containing organic matter with different carbon chain lengths. In order to recover the valuable components, direct or indirect high-temperature steam distillation is usually used to separate the long and short carbon chain organic matter entrained in the sludge. During the separation process, exhaust gas will be discharged, which generally refers to such exhaust gas as sludge exhaust gas . [0003] This kind of sludge waste gas is usually discharged in a low amount, about 50m3 / h~30000m 3 / h, the temperature can reach above 350°C, and the water content is greater than 10%. The exhaust gas contains a variety of oil components with different carbon chain structures such as straight and ring, and the total non-methane hydrocarb...

AI Technical Summary

Problems solved by technology

However, for high-temperature exhaust gas, there are not many options for treatment devices. Usually, filter treatment technology is required to meet the emission concentration of particulate matter less than 10mg / Nm 3 However, the oil contained in this kind of exhaust gas can easily cause the filter material of the filter dust collector to be clogged and compacted. Under high humidity conditions, the tiny particles in the exhaust gas are easy to adhere to the surface of the filter medium, resulting in excessive resistance of the dust removal system and affecting the equipment. The stability of the operation, and it is easy to cause damage to the dust collector, so the conventional single filter dust removal technology cannot effectively deal with this kind of sludge waste gas

In addition, the technologies such as direct incineration, activated carbon adsorption and analysis, and RTO, which are conventionally used for VOC waste gas treatment, are not suitable to be extended to the treatment of this kind of sludge waste gas.