Slurry antiscalant injection device with preheating structure

Abstract

The invention discloses an oil slurry antifouling agent injecting device provided with a preheating structure. The device comprises an antifouling agent injecting pipeline (1), wherein a nozzle (4) is arranged on the end port of the antifouling agent injecting pipeline (1); the nozzle (4) extends into an oil slurry pipe (6); the spraying direction of the nozzle is same with the flowing direction of oil slurry in the oil slurry pipe (6); the oil slurry antifouling agent injecting device is characterized by further comprising an oil slurry antifouling agent preheating structure; the oil slurry antifouling agent preheating structure is the extension part of the antifouling agent injecting pipeline (1); and the extension part is a spiral pipeline (2) adhered to the outside of the oil slurry pipe (6). According to the oil slurry antifouling agent injecting device disclosed by the invention, through double actions that an antifouling agent is heated in advanced by heat of the oil slurry pipe and a thickened module is added in a welding part for stabilizing, leakage caused by the flushing of a low-temperature medium on equipment due to the cavitation of a high-temperature medium is avoided, and production continuity is achieved.

Description

technical field [0001] The invention relates to the field of oil slurry equipment, in particular to an oil slurry antiscalant injection device provided with a preheating structure. Background technique [0002] The oil slurry at the bottom of the catalytic cracking fractionation tower has a high density, high operating temperature, high content of polycyclic aromatic hydrocarbons and a certain amount of catalyst dust. During the long-term operation of the unit, high-temperature condensation and coking of heavy components or deposition of solid particles are prone to occur. Scale will affect the heat transfer effect and normal operation of the oil slurry system. At present, the oil slurry scale inhibitor widely used in the oil slurry system is specially added to slow down or avoid the scaling of the oil slurry system. The reason why the scale inhibitor has the function of preventing or slowing down the scaling of the oil slurry system. The process of adding antiscalant is br...

AI Technical Summary

Problems solved by technology

[0004] In actual production, the antiscalant injection pipeline and the crude oil slurry pipeline are connected by socket welding. Long-term use will cause leakage at the weld joint, resulting in parking for treatment of leaks, seriously affecting production, and causing unnecessary losses to the enterprise.

The main reasons for the leakage point are as follows: First, the oil slurry contains a small amount of catalyst flow wear, which has a serious impact on the pipeline erosion; The welded part is relatively fragile, so it is easy to form a leak point, which brings trouble to production

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