An oil slurry antiscalant injection device

Abstract

The invention discloses an oil slurry scale inhibitor injection device which comprises a scale inhibitor injection pipeline (1-5) and a nozzle (1-8) arranged at a port of the scale inhibitor injection pipeline (1-5), wherein the nozzle (1-8) stretches into an oil slurry pipe (1-1); and the spray direction of the nozzle is the same as the flow direction of oil slurry in the oil slurry pipe (1-1). The device also comprises a heater (1-4) arranged on the scale inhibitor injection pipeline (1-5); and the heater (1-4) is positioned outside the oil slurry pipe (1-1) and connected with the scale inhibitor pipeline (1-5) through a flange (1-3). According to the device disclosed by the invention, the scale inhibitor is heated by the heater in advance while the cap structure is thickened and stabilized, so that the leakage resulting from the scour of equipment caused by low-temperature medium encountering cavitation of high-temperature medium is avoided, and the production continuity is realized.

Description

technical field [0001] The invention relates to the field of oil slurry equipment, in particular to an oil slurry antiscalant injection device. 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 briefly described as follows: [0003]...

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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