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Method for recycling deoiled water using counterflow falling-film evaporators

A technology of falling film evaporator and evaporator, which is applied in the direction of chemical instruments and methods, evaporation, separation methods, etc., can solve the problems of high installation costs and achieve the effects of low cost, small installation costs, and reduced chemical consumption requirements

Inactive Publication Date: 2013-11-13
AQUATECH INT LLC
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  • Abstract
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Problems solved by technology

This is a serious disadvantage that requires the construction of extremely strong municipal foundations, making them even more expensive to install

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  • Method for recycling deoiled water using counterflow falling-film evaporators
  • Method for recycling deoiled water using counterflow falling-film evaporators
  • Method for recycling deoiled water using counterflow falling-film evaporators

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[0056] Various embodiments and aspects of the invention can be further understood by reference to the following examples. The examples should be understood to demonstrate exemplary aspects of the invention, and not to limit the claims.

[0057] For this example, assume a 5,000 bpd (barrel / day) SAGD production facility with a continuous boiler feed water requirement of 273m 3 / h. High pressure drum boilers generate steam for injection into subterranean formations. A mixture of oil and water is pumped through the production well to the surface. The oil is separated and removed as product. The separated water is further treated to remove oil to levels 3 / h and the evaporator system concentrates the deoiled water stream approximately 20 times to produce 273m 3 / h high-purity distillate stream (equal to boiler feed water requirements) and 14m 3 / h of brine blowdown flow.

[0058] Consider designing a conventional evaporator system with a process flow as described in the Heins...

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Abstract

We provide an evaporator technology for treatment of produced water that may be deoiled water. Systems described herein utilize a vertical tube heat exchanger bundle where the brine is distributed in a falling film along the inside of the tube wall. Condensing steam causes a portion of the deoiled water to evaporate; this water vapor travels upward in a counterflow direction relative to the deoiled water. This evaporator technology provides several design advantages over the conventional vertical tube co-current flow evaporators (where the vapor flows downward with the falling film). These advantages include a minimal total installed cost (TIC) as well as offering optimal design features for water chemistry management.

Description

[0001] Cross-references to related applications [0002] This application claims priority to US Provisional Patent Application No. 61 / 422,965, filed December 14, 2010. Said US Provisional Patent Application is incorporated herein by reference. technical field [0003] Embodiments of the invention relate to methods, systems, and apparatus for recycling deoiled water used in heavy oil production. Background technique [0004] Oil can be extracted from underground reservoirs using a number of processes. One of those processes is Steam-Assisted Gravity Drainage (SAGD). In a typical SAGD process, steam is injected downhole to increase the mobility of the oil and allow it to be extracted from the formation. The process produces large volumes of water, including oil and other contaminants, which flow to the surface through production wells. It is important to the process to recirculate this water for two main reasons. [0005] First, boilers producing steam for the SAGD proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F9/04
CPCC02F2101/32C02F1/40C02F1/048C02F1/20B01D1/065B01D5/006B01D1/28
Inventor D·P·比约克隆D·克尔赛G·J·曼迪戈C·蒂瓦里
Owner AQUATECH INT LLC
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