Method for preparing clean water by using oil field sewage and for utilizing waste heat
A technology for oilfield sewage and clear water, applied in the direction of heating water/sewage treatment, etc., can solve problems such as unstable operation, membrane fouling and membrane damage, corrosion and scaling of heat transfer surfaces, and achieve resource utilization and energy saving and emission reduction Effect
Active Publication Date: 2012-05-09
CHINA PETROCHEMICAL CORP +2
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Problems solved by technology
However, these technical processes have problems such as membrane fouling and membrane damage, corrosion and scaling on the heat transfer surface, and unstable operation.
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[0011] In order to further disclose the technical solutions of the present invention, the following will be described in detail through examples in conjunction with the accompanying drawings in the description;
[0012] The present invention utilizes the flash tower system to flash vaporize and condense the oilfield sewage within a certain negative pressure range, collect the condensed clear water, and discharge the unflash vaporized concentrated sewage from the bottom of the flash tower into the sewage system through a vacuum pump. Vacuumize to maintain the negative pressure range of flash vaporization and the flash vaporization depth and flash vaporization treatment capacity of sewage, absorb the heat of the working medium in the heat exchanger through condensation heat exchange, and then heat the medium that needs to be heated in other systems to carry out waste heat use.
[0013] The flash tower system is mainly composed of a sewage pump 1, a flash tower 2, a compressor 14...
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The invention relates to a method for preparing clean water by using oil field sewage and for utilizing waste heat, which is characterized by comprising the following steps of: controlling a certain negative pressure range in a flash evaporation tower in a flash evaporation process by a flash evaporation vaporization method, carrying out flash evaporation vaporization and condensation on the oil field sewage, collecting the condensed clean water, settling the concentrated sewage without flash evaporation vaporization, and discharging into a sewage system from the bottom of the flash evaporation tower; keeping the negative pressure range of flash evaporation vaporization and the control for the flash evaporation vaporization depth and the flash evaporation vaporization amount of the oil field sewage through the vacuum pumping of a vacuum pump, absorbing the heat of a heat exchange working fluid through condensation heat exchange and then heating a medium needing heating of other systems for utilizing waste heat.
Description
1. Technical field [0001] The invention relates to a method for treating oilfield sewage and utilizing heat generated in the treatment process. Specifically, it is a method for preparing clean water from oilfield sewage and utilizing waste heat. 2. Background technology [0002] A large amount of sewage is produced during the development and production of oil and gas fields, which is one of the main industrial pollution. The temperature of these oily sewage is often high and the volume is large. If the sewage is discharged directly, it will cause serious pollution to the land and the surrounding environment, and directly affect the location of the oil field. ecological environment. High-temperature oilfield wastewater carries a large amount of available heat energy. How to make resource utilization of oilfield wastewater to achieve the goal of "energy saving and emission reduction" in oilfields is undoubtedly a key problem to be solved urgently in the sustainable developme...
Claims
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IPC IPC(8): C02F1/06
Inventor 李清方赵海培祝威张建赵守明张新军张宁宁桂召龙刘海丽李毅谷梅霞
Owner CHINA PETROCHEMICAL CORP