Completely surrounded jacket leaking stopping method and structure for expansion joints of SO2 high-temperature smoke tubes

Abstract

The invention relates to the field of SO2 high-temperature smoke tube equipment, in particular to a completely surrounded jacket leaking stopping method and structure for expansion joints of SO2 high-temperature smoke tubes. According to the technical scheme, the completely surrounded jacket leaking stopping method for the expansion joints of the SO2 high-temperature smoke tubes comprises the following steps: a, machining at least one pair of annular rib plates and at least two fan-shaped cover plates according to sizes of the SO2 high-temperature smoke tubes in site; b, respectively welding the annular rib plates to outer surfaces of the two adjacent tubes, wherein an expansion joint between the two adjacent tubes is positioned between the annular rib plates; c, uniformly distributing the fan-shaped cover plates on the periphery of the expansion joint in the circumferential direction of the expansion joint, arranging the fan-shaped cover plates on the annular rib plates, connecting the adjacent fan-shaped cover plates in a closely attached manner, and completely sealing the expansion joint by closed space formed by the fan-shaped cover plates and the annular rib plates. The completely surrounded jacket leaking stopping method and structure for the expansion joints of the SO2 high-temperature smoke tubes are convenient and simple when constructed in site, and are safe, environmentally friendly, economical and practical, and time and labor are saved. The completely surrounded jacket leaking stopping method and structure are particularly suitable for a technology for repairing leaked SO2 high-temperature smoke tubes.

Description

technical field [0001] The present invention relates to SO 2 In the field of high-temperature flue gas pipeline equipment, especially a SO 2 A leak-stopping method and a leak-stopping structure for a fully-enclosed jacket of a high-temperature smoke pipe expansion joint. Background technique [0002] The flue gas produced by the copper smelter contains very heavy sulfur and cannot be discharged into the air, so pipes are used to collect the flue gas to make sulfuric acid. SO output from Kunpeng copper smelter to sulfuric acid plant 2 There are 13 expansion joints with a diameter of 3 meters installed on the high-temperature flue gas pipeline. In actual production, the expansion joints will be corroded and perforated by the condensed acid produced by the condensation of the flue gas in about 3 months, causing SO 2 Smoke leakage pollutes the environment. [0003] Because the cost of replacing a stainless steel expansion joint is very high, at least 2 to 3 days of productio...

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Problems solved by technology

[0003] Since the cost of replacing a stainless steel expansion joint is very high, at least 2 to 3 days of production shutdown is required, and the service life after replacement is too short. Therefore, when a leak occurs, it is generally used to make a half-joint jacket and fill it with cement to seal it. This method can quickly plug the leak but the service life is not long, and it cannot adjust the thermal expansion and contraction of the pipeline, which will affect production and pose a safety hazard

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