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Multiple effect concentration swap de-scaling system

A subsystem, salt concentration technology, applied in multi-effect evaporation, multi-effect/segregation, control/manipulation systems, etc., to solve problems such as performance degradation, blocked flow paths, and reduced heat transfer effectiveness

Active Publication Date: 2015-12-02
SALTWORKS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, saturated operation increases the tendency for solids and scale to accumulate on the interior surfaces, reducing heat transfer effectiveness and clogging flow paths leading to performance degradation and reliability challenges

Method used

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  • Multiple effect concentration swap de-scaling system
  • Multiple effect concentration swap de-scaling system
  • Multiple effect concentration swap de-scaling system

Examples

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Embodiment Construction

[0067] Embodiments described herein relate to a multiple-effect thermal desalination system configured to change the order in which physical thermal desalination subsystems are applied in the multiple-effect thermal desalination system. The term "multi-effect thermal desalination system" is used herein to describe a thermal desalination system that includes more than one thermal desalination subsystem and thus includes more than one associated desalination process stage. One exemplary embodiment of the systems and methods disclosed herein is based on a multiple-effect humidification-dehumidification (HDH) thermal desalination system. At least some of the embodiments described herein are directed to reducing the frequency or need to wash a desalination system, as well as mitigating the adverse consequences of adding fresh water to a solution being concentrated.

[0068] figure 1 A first exemplary embodiment of a four-stage multi-effect HDH thermal desalination system 101 is sh...

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Abstract

A multistage thermal desalination system, together with its associated method of use, allows de-scaling of subsystems exposed to saturated saltwater by alternating the saturation stage of the process between two neighboring physical desalination stages. The desalination system is provided with at least one transfer conduit, at least one pump, and valving to permit saltwaters being desalinated by higher and lower stage desalination subsystems to be swapped. By replacing the saturated saltwater in a higher salt concentration desalination subsystem with lower salt concentration saltwater, the scaling in higher salt concentration desalination subsystem is reduced while the saturation load is placed on another of the desalination subsystems.

Description

technical field [0001] The present invention provides a method for increasing the reliability of multiple effect evaporation or flash desalination processes. More specifically, the method periodically exchanges the concentration of brine treated with each effect so that descaling is achieved during operation. Background technique [0002] Treating spent brine to reduce volume is becoming increasingly important, especially for mining, oil and gas, and inland desalination systems. Mines produce tailings water which is often ponded. Oil and gas extraction operations produce brines within oil and gas reservoirs or during processing. Desalination is increasingly used in both industries because of regulatory requirements to treat damaged water. Desalination is also used in coastal areas to produce freshwater from seawater, with more of the spent brine being returned to the ocean. Inland brackish brine can be desalinated; however, there is often no convenient way of disposing o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/26C02F1/00C02F1/04
CPCC02F1/04B01D1/26C02F1/06C02F2103/08C02F2103/10C02F2209/005C02F2209/006C02F2209/03C02F2209/05C02F2209/40C02F2301/08C02F2303/22Y02A20/124Y02A20/131B01D3/065B01D3/143B01D3/146B01D3/42B01D5/0036C02F1/008C02F1/042C02F1/265
Inventor B·斯帕罗S·纳维德
Owner SALTWORKS TECH INC
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