Sea sand desalination-based processing process

Abstract

The invention discloses a sea sand desalination-based processing process. The sea sand desalination-based processing process comprises the following steps that (1) an offshore sea sand collecting ship collects sea sand in an offshore collecting area; (2) after being collected, the sea sand is transported to an offshore desalination ship; (3) a transport ship transports fresh water to a desalination device of the offshore desalination ship to perform desalination on the sea sand; and (4) after desalination is finished, the sea sand is transported by the transport ship to a land sea sand finished product stacking area to be treated by a non-shore-based production line, and finished sand is stacked on a shore or directly sold on the shore. As a treatment process is added in a sea sand collecting and transporting process, and compared with shore-based treatment, the treatment process of the sea sand desalination-based processing process is advanced, process steps are reduced, the shore-based transshipment amount is reduced, shore-based treatment emission is reduced, on the premise that the quality is guaranteed, the process flow of sea sand desalination treatment is shortened, the whole efficiency of sea sand desalination treatment is improved, and cost of a technical scheme is reduced; and as the fresh water can be provided through transshipment after the transportation ship takes the fresh water from a fresh water area, land pollution discharge is reduced, land occupation area is reduced, and affection to sea sand desalination treatment by field limitation is avoided.

Description

technical field [0001] The invention relates to the technical field of sea sand desalination, in particular to a sea sand desalination treatment process. Background technique [0002] At present, my country's annual production of cement concrete is about 2.5 billion m3, plus mortar and other uses, more than 3 billion tons of construction sand are needed every year. As concrete fine aggregate, the contradiction that the supply of river sand resources exceeds demand has become increasingly prominent. The shortage of river (river) sand resources has appeared in many places; at the same time, in order to prevent the excessive exploitation of river (river) sand from causing serious damage to the natural landscape and ecological environment, various localities have gradually taken measures to limit it. [0003] In order to solve the contradiction between the supply and demand of river sand, people have turned their attention to the ocean, which accounts for 70.8% of the earth's a...

AI Technical Summary

Problems solved by technology

The conventional sea sand desalination treatment process belongs to the shore-based treatment. All the treatment processes, including removing mud, shells and stones, desalination, etc., are all realized on the shore. There is almost no treatment link in the process of sea sand collection and transportation to the shore. , resulting in problems: the cost is relatively high, first of all, a larger site must be set up, and in order to meet the requirements for processing sea sand or semi-fresh salty sand, infrastructure construction is required; secondly, sea sand or semi-fresh salty sand is produced from Underwater mining usually needs to be turned around when it is transported to the site, and each turnaround will inevitably increase the operating cost

The site has specific requirements, and the site that meets the requirements is not necessarily close to the project site and mining area, resulting in rising transportation costs; thirdly, the disposal of impurities generated by shore-based processes

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