Ship clearance oil dehydrating agent and preparation method thereof

Abstract

The invention discloses a ship clearance oil dehydrating agent and a preparation method thereof and relates to clearance oil. The ship clearance oil dehydrating agent comprises the following components in percentage by mass: 25-60 percent of three-block-polyether, 1-5 percent of a demulsifying compound and 35-70 percent of a solvent. The three-block-polyether can be selected from imidazoline poly-oxypropylene polyoxyethylene polyoxypropylene ethers and polyethylene polyamine poly-oxypropylene polyoxyethylene polyoxypropylene ethers by mixing; the demulsifying compound can adopt NaCl aqueous solution; and methanol or ethanol can serve as the solvent. The preparation method comprises the following steps: heating and dissolving the three-block-polyether, uniformly mixing with the demulsifying compound and the solvent, thereby obtaining the ship clearance oil dehydrating agent. The amount of the ship clearance oil dehydrating agent is small and is about 100-250ppm. The dehydration effect is good, the dehydration rate can be over 99.5 percent, the oil-water interface is clear, and the water is clear and transparent. The dehydration speed is high, and the time from the operation of adding the ship clearance oil dehydrating agent to the operation of allowing an oil-water transition layer to completely disappear is only 15 minutes. The broad spectrum property is high, and the cost is low.

Description

technical field [0001] The invention relates to clearance oil, in particular to a ship clearance oil dehydrating agent and a preparation method thereof. Background technique [0002] Clearance oil is the heavy oil (ship fuel oil) that is artificially cleaned out from the ship's oil tank, of which 180 # Mostly heavy oil. Heavy oil is the remaining heavy oil after gasoline and diesel oil are extracted from crude oil, which is characterized by large molecular weight and high viscosity. The specific gravity of heavy oil is generally 0.82-0.95, and the specific heat is about 10,000-11,000kcal / kg. Its composition is mainly hydrocarbons. In addition, it contains a part (about 0.1-4%) of sulfur and a trace amount of inorganic compounds. According to the classification method of international conventions, heavy oil is called persistent oil. As the name suggests, this kind of oil is relatively viscous and difficult to volatilize. So once it lands, it is very difficult to remove. ...

AI Technical Summary

Problems solved by technology

The separated oil-water mixture contains more colloids and asphaltenes in the system, which will emulsify a large amount of water in the heavy oil, forming a stable water-in-oil (w / o) emulsion, and in the normal operation of the machine With a large amount of waste engine oil falling into the oil tank, and some unscrupulous traders artificially blending waste chemical raw materials, the composition of the cleared oil is extremely complex, which brings great difficulty to the dehydration in the future

Water in heavy oil will reduce the heat transfer temperature, which not only increases the load on equipment and fuel consumption, but also affects normal operation

If the water content is too large, it will also cause tower flushing and other accidents. For example, in the process of heavy oil refining, when water and heavy oil are heated together, the water will rapidly vaporize and expand, and the pressure will rise, affecting the normal operation of the refinery and product quality. will explode

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