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Hot-method seawater desalination technology for solid-liquid separation

A solid-liquid separation and process technology, which is applied in the field of thermal seawater desalination process, can solve problems such as imperfect process, achieve the effects of saving equipment manufacturing costs and operating costs, increasing fresh water production, and improving fresh water quality

Inactive Publication Date: 2020-08-28
孔令斌
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Problems solved by technology

Now it seems that the process is not perfect and needs to be improved

Method used

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  • Hot-method seawater desalination technology for solid-liquid separation
  • Hot-method seawater desalination technology for solid-liquid separation

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Embodiment Construction

[0013] The embodiment is a set of seawater desalination device which uses oil and gas as fuel and has seven stages of seawater evaporation tanks. Such as figure 2 shown. The boiler in the heating process adopts the fuel-fired gas-fired boiler described in Chinese invention patent 201510379482.0. The salt making process includes 2-stage seawater evaporation tanks of the first stage and the second stage. The water production process includes 5-stage seawater evaporation tanks from the third stage to the seventh stage. The recovery process of salt-making wastewater is that the bottom of the condenser of the second-stage seawater evaporation tank is connected to the second-stage seawater evaporation tank. Salt wastewater recovery channels are simplified. The steam condensed water circulation loop 1 is from the steam outlet of the boiler, and returns to the water inlet of the boiler through the condenser of the first-stage seawater evaporation tank. The inlet of the flue gas ...

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Abstract

The invention provides a hot-method seawater desalination technology for solid-liquid separation. According to the principle of a communicating vessel, the bottom of a second-stage seawater evaporation tank condenser is communicated with the second-stage seawater evaporation tank, the second-stage seawater evaporation tank condenser is communicated with the upper space of a first-stage seawater evaporation tank, and the water level in the second-stage seawater evaporation tank condenser is inevitably the same as that of the first-stage seawater evaporation tank. A salt-making wastewater recovery process is set before a water-making process and after a salt-making process. Salt-making wastewater is recycled in the salt-making process, salt-making wastewater and heat loss are avoided, the seawater of the second-stage seawater evaporation tank is diluted, and the quality of fresh water is improved. A salt-making wastewater heat exchange channel, a salt-making wastewater recovery channel and a salt-making wastewater tank in the prior art are omitted, and the technological process is changed into a heating process, the salt-making process, the salt-making wastewater recovery process andthe water-making process. Theoretically, heat is discharged from a device along with salt and fresh water, and the heat utilization rate reaches the theoretical limit.

Description

[0001] Technical field [0002] The invention relates to a seawater desalination process, in particular to a solid-liquid separation thermal seawater desalination process. Background technique [0003] The comprehensive utilization of seawater resources is an important field of the future marine economy and an inevitable choice for the development of human society. The solid-liquid separation of seawater salt and freshwater is the only way for comprehensive utilization of seawater resources. However, the modern salt-making process and the seawater desalination process are in a situation where both salt and fresh water cannot have both. The salt-making wastewater produced by Sichuan salt-making enterprises does not meet the discharge standards and can only be reinjected into salt wells. The discharge of concentrated brine produced by large coastal desalination plants has adverse effects on the environment, and the salt has not been used rationally. Chinese invention patent 2...

Claims

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Application Information

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IPC IPC(8): C02F1/04C02F103/08
CPCC02F1/04C02F2103/08C02F2301/08C02F2303/10Y02A20/124
Inventor 孔令斌
Owner 孔令斌
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