Oilfield produced water low-boiling pressurized condensation heat exchange equipment and technology

Abstract

The invention relates to oilfield produced water low-boiling pressurized condensation heat exchange equipment and technology. According to the technology, the method includes the following steps that 1 oilfield produced water is put into a low-pressure steam generator to be vaporized partly under 5-10 KPa by an oilfield produced water inlet valve, and after the oilfield produced water is vaporized, the oilfield produced water passes into an efflux reinjection pipeline through an oilfield produced water efflux booster pump after releasing heat; 2 low-pressure steam is vaporized by the low-pressure steam generator, after the low-pressure steam is pressurized by a steam booster pump and is transported to a steam condensation heat exchanger tube pass, after heat is released, the low-pressure steam is coagulated to be water, and the water is discharged to a hot-water cylinder after being pressurized by a condensation water efflux pump; 3 one side of the steam condensation heat exchanger tube pass is provided with heating water coming from a heating pump, after the heating water absorbs heat and is warmed, the heating water passes into a heating pipe network through a heating water outlet valve; less amount of non-condensable gas is discharged to the atmosphere through a non-condensable gas sucking pump. The equipment and technology have the advantages that the system is relatively simple and stable, the energy efficiency ratio is high, the operating cost is low, the corrosion resistance is achieved, scale formation and polymeride of the oilfield produced water are not fear to block, and heating or oilfield crude oil dehydration heat sources can be provided stably.

Description

technical field [0001] The invention relates to a process and equipment for utilizing low-grade heat energy, in particular to a low-boiling pressurized condensation heat exchange equipment and process for oil field produced water. Background technique [0002] There are a large number of oilfields in my country that reinject sewage after separating crude oil, and Shengli Oilfield alone has more than 300 million tons per year; over the past two years, booster heat pumps and absorption heat pumps in major oilfields in my country have been greatly promoted and applied, and the energy-saving effect Significantly, it has made a greater contribution to energy saving and emission reduction. However, in use, the scaling problem has always plagued engineers and technicians, especially the polymer contained in the tertiary oil recovery fluid, which often blocks the heat exchanger and affects the heat exchange efficiency of the heat exchanger, making the heating coefficient of the h...

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Problems solved by technology

[0003] In the patent application documents and heat pump heating processes of major oilfields in recent years, a variety of oilfield sewage waste heat-driven heat pump heating or crude oil dehydration processes and equipment are described. There are many ingredients, which will block the heat exchanger during use, and have not been widely used in recent years

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