Reuse treatment system and treatment method for high-temperature separated water of steam injection boiler

Abstract

The invention discloses a reuse treatment system and treatment method for high-temperature separated water of a steam injection boiler, and belongs to the technical field of water treatment. The system comprises the steam injection boiler, a four-stage heat exchange unit, a chemical silicon removal unit, a flash tank, a TVC unit, a buffer tank, a boiler feed water tank, and a crystallization separation unit; the fourth-stage heat exchange unit comprises a first heat exchanger, a second heat exchanger, a third heat exchanger, and a fourth heat exchanger. After silicon, salt and organic mattersare removed from the high-temperature and high-salt separated water of the steam injection boiler, the separated water is returned to the steam injection boiler, so that the quality of dry steam generated by the steam injection boiler meets the requirement of steam injection production; moreover, the waste water and the heat energy contained therein are recycled, so that cooling water is used little or not used, and near zero emission disposal and low-cost operation of the high-temperature and high-salt separated water of the steam injection boiler are achieved. The system and the method improve the ecological environment, and are of great significance on energy conservation, water conservation and sustainable use of the auxiliary gravity drainage technology.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a high-temperature separation water reuse treatment system and treatment method of a steam injection boiler. Background technique [0002] In 1978, Dr. R.M.Bulter, based on the principle of water injection and salt extraction, combined heat conduction and fluid heat convection, steam as a heat source, and relied on the gravity of asphalt and condensate to mine heavy oil, proposed the auxiliary gravity drainage for extra heavy oil development technology. Thermal recovery of heavy oil is currently the main technical means for the development of unconventional heavy oil. It has been widely used in the United States, Venezuela, and Canada. my country has successively promoted and applied it in heavy oil fields such as Liaohe, Xinjiang, Shengli, and Henan. [0003] The steam injection boiler provides a heat source for the heavy oil recovery technology, which is a very impor...

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Problems solved by technology

[0006] 2) Steam injection boilers are rich in silicon, which can easily cause blockage of traditional membrane processes

At the same time, the membrane process requires the temperature of the treated water to be 30-40°C. Using the membrane process not only requires a large amount of cooling water, but also the heat energy in the high-temperature and high-salt separation water generated in the steam injection boiler cannot be effectively utilized as a resource, and the economy is poor.

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