Composite water treatment agent for thickened oil thermal recovery boiler and preparation method thereof

Abstract

The invention relates to a composite water treatment agent for a thickened oil thermal recovery boiler and a preparation method thereof. The composite water treatment agent for the thickened oil thermal recovery boiler comprises the following components according to weight percentage: 10%-25% of DTPMP (diethylene triamine penta methylene phosphonic acid), 10%-15% of sodium polyacrylate, 10%-12% of maleic acid acrylic copolymer, 5%-10% of 2-hydroxyphosphonoacetic acid, 5%-10% of acetone oxime, and the balance of water. The preparation method of the composite water treatment agent for the thickened oil thermal recovery boiler comprises the following steps of adding water into a reaction kettle, then stirring and simultaneously adding the DTPMP, the sodium polyacrylate, the maleic acid acrylic copolymer, the 2-hydroxyphosphonoacetic acid and the acetone oxime, then reacting for 30-40 minutes, and obtaining the composite water treatment agent for the thickened oil thermal recovery boiler. According to the composite water treatment agent for the thickened oil thermal recovery boiler, problems of corrosion and scaling of a steam drive thermal recovery are solved, and the requirement on production on site is met.

Description

technical field [0001] The invention relates to a composite water treatment agent for heavy oil thermal recovery boilers and a preparation method thereof, belonging to the technical field of preparation of water treatment agents. Background technique [0002] In the process of boiler water treatment, the main problems that are prone to occur in boiler equipment and pipelines are: corrosion, scaling, sediment, and boiler water entrainment. [0003] Evaporation from the boiler can lead to concentration of impurities. The deposition of scale in boilers on heat exchange surfaces, or the deposition of suspended matter on metal surfaces, becomes hard and sticky. The high temperatures in the boiler break down some minerals and cause others to become less soluble. [0004] When the boiler feed water contains iron, iron scale will be formed on the metal heating surface. Due to the potential difference between the metal surface and the iron scale deposits, it will cause localized co...

AI Technical Summary

Problems solved by technology

However, this is still not enough, because corrosion may still occur in the boiler system at high temperature and medium pressure due to the concentration of oxygen in the boiler. Therefore, it needs to be completely removed by chemical methods. If the dissolved oxygen exceeds 15ppb, it will reach 30 -50ppb, the corrosion of the thermal system will be very serious, manifested in the iron content of steam and condensate seriously exceeding the standard

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