External discharge type continuous hydrate seawater desalination device

Abstract

The invention discloses an external discharge type continuous hydrate seawater desalination device, and belongs to the technical field of hydrate seawater desalination. The device comprises a high-pressure reaction kettle, a low-temperature seawater spraying system, a high-concentration seawater recycling system, a hydrate dissociation chamber and a gas intake and collection system. A gas hydration agent and seawater are introduced into the high-pressure reaction kettle to generate a hydrate, the hydrate is lifted out of the water surface for low-temperature seawater spraying by a hard filter screen, meanwhile, high-concentration seawater is discharged, seawater is reintroduced for next-step hydrate generation reaction, then a hydrate is discharged to the outer-layer hydrate dissociation chamber, dissociated fresh water is collected, and the gas hydration agent is collected and recycled, so as to implement highly concentrated production by virtue of a hydrate seawater desalination technology. At the same time of low-temperature seawater spraying, the high-concentration seawater is discharged and the seawater is reintroduced into the high-pressure reaction kettle to start a next-step hydrate generation process to implement continuous reaction for hydrate seawater desalination, so that the device is more compact in structure and more complete in function, and the economy is improved.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination by hydrate method, and relates to an external discharge type continuous hydrate method seawater desalination device. Background technique [0002] With the increasing consumption of fresh water resources around the world, the problem of fresh water has gradually become a serious problem that many countries and regions have to face. Seawater resources are very rich, and seawater desalination is an effective solution. Seawater desalination is more commonly used with low-temperature multiple-effect distillation, multi-stage flash evaporation and membrane reverse osmosis, while hydrate seawater desalination has the technical advantages of low energy consumption, simple equipment, and compactness, and has a good application prospect. [0003] Hydrate seawater desalination technology utilizes gas hydration agent and seawater to generate hydrate, and then decomposes ion-free hydrate crysta...

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Problems solved by technology

[0003] Hydrate seawater desalination technology utilizes gas hydration agent and seawater to generate hydrate, and then decomposes ion-free hydrate crystals separately to obtain fresh water. At present, the development of hydrate seawater desalination devices has achieved certain development results, but found that The existing devices generally have the problem that residual concentrated seawater on the surface of hydrates affects the quality of desalinated water

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