CN108331561A - The recovery method of common seabed surface combustible ice - Google Patents

Abstract

A kind of recovery method of common seabed surface combustible ice, has：The geologic aspects of combustible ice mineral reserve most common distribution wherein from top to bottom：Seawater, the combustible ice dew mineral reserve for being covered in seabed rock layer surface；It is characterized in that：The seabed combustible ice dew mineral reserve that one, is intended to exploitation by underwater shock vehicle hammer A smash；Combustible ice fragment that two, are crashed to pieces by the grab bucket digging of excavator B is simultaneously put on underwater conveyer belt C nearby, then the vertical positions collecting and distributing lifting point D of combustible ice dew mineral reserve are conveyed to, and the combustible ice fragment body row at underwater conveyer belt C-terminal is fallen into lifting seal box E temporarily store from top to bottom；Three, are waited for will be after seal box E sealings, you can are lifted transport out of mining area at any time；The running that the underwater shock vehicle hammers A, underwaterr excavator B, underwater conveyer belt C and lifting seal box E into shape is remotely controlled by the display of underwater camera F；All underwater utensils can accomplish deep diving and the regular maintenance work without periodically from water exclude infiltration.

Description

Common Mining Methods of Combustible Ice on Submarine Surface

technical field

The invention relates to a method for mining combustible ice on the common seabed surface.

Background technique

With the huge consumption of especially resources, human beings have been facing a huge crisis of especially resources since the beginning of the 21st century. As a big energy-consuming country, China’s annual crude oil imports have exceeded 100 million tons, and the output of domestic onshore oil and gas fields has barely remained stable. Experts It is estimated that there will be no major breakthroughs in the short term. As an alternative energy source, natural gas hydrate, that is, combustible ice, is being favored by countries all over the world, especially by developed countries.

Take the natural gas hydrate formed on the seabed as an example: at an ambient temperature of 1°C to 20°C, as long as the water depth is 300 meters, that is, the pressure reaches 30 atmospheres, natural gas hydrate will form, which is a combustible ice deposit; while the environment is high At the above-mentioned temperature or/and the environment lower than the above-mentioned pressure, the natural gas hydrate will be promoted to decompose into methane and water.

——The reserves of combustible ice minerals in the world are twice the reserves of combustible minerals such as petroleum, enough to be used by the global population for 1,000 years; theoretically, 1 m ³ of saturated natural gas hydrate can release 164 m ³ of methane under standard conditions Gas, while the combustion of natural gas hydrate only produces CO ₂ and H ₂ O, which is a rare green and clean energy.

China's South China Sea seabed is extremely rich in combustible ice deposits. However, like other sea areas in the world, the combustible ice deposits have not been exploited. The main reason is that the mining cost of combustible ice ores (gas hydrate) is very high. , about 200 US dollars/m ³ ; so far, many "laboratory" methods have been researched by people, but they are all in the exploration stage, and it is difficult to enter the stage of practical commercial exploitation that can be scaled up.

Contents of the invention

The object of the present invention is to: transplant the mining mode of the open-pit coal mine in the atmospheric air to the mining mode (method) of the combustible ice deposit directly in contact with the water body on the seabed surface.

In order to achieve the object of the present invention, it is proposed to adopt the following technologies:

There are: from top to bottom, the most common geological situation in which combustible ice deposits are distributed: seawater, combustible ice dew deposits covering the surface of seabed rock formations;

It is characterized by:

1. The underwater combustible ice dew deposits to be mined are crushed by the underwater hammer hammer A;

2. The crushed combustible ice fragments are excavated by the grab bucket of the excavator B and placed on the nearby underwater conveyor belt C, and then transported to the vertical collection and distribution lifting point D of the combustible ice dew deposit, and the Downwardly drop the combustible ice fragments located at the C end of the underwater conveyor belt into the lifting and sealing box E for temporary storage;

3. After the sealing box E is sealed, it can be hoisted and transported away from the mining area at any time;

The operation of the underwater impact car hammer A, underwater excavator B, underwater conveyor belt C and lifting sealing box E is remotely controlled by the display of the underwater camera F; Or, people in the submarine remotely control or supervise at close range;

The underwater impact car hammer A, underwater excavator B, underwater conveyor belt C, lifting sealing box E and underwater camera F all have the waterproof and sealing performance that can be achieved by deep diving, and do not need Like the submersible pumps of the prior art, it is necessary to regularly leave the water for routine maintenance work to eliminate water seepage;

The described waterproof sealing structure is the same as the patent application technology of "submarine electric propeller propeller capable of deep diving over 1,000 meters and free from maintenance to allow oil to waterproof and seal).

Features of the present invention:

Because all underwater appliances in the method of the present invention can solve the routine maintenance work that can dive deep and do not need to leave the water regularly to get rid of seepage, and the actions or behaviors of all underwater mining appliances must be effectively controlled by the water surface. Remote control, this has just created extremely favorable condition for the combustible ice mineral deposit that the present invention can implement commercial exploitation seabed surface cover.

Detailed ways

It is mainly to make necessary explanations for the main differences between the present invention and the prior art.

The whole underwater mining process (most of which are located on the seabed surface with a depth of more than one thousand meters) cannot obtain the direct participation of underwater divers. Therefore, the whole process of underwater mining of the present invention must be carried out under the premise that no one directly intervenes . ——For the mining process of combustible ice on the surface of the seabed, the main premise of the mining is to realize it through the remote control of the surface personnel, which is the easiest to think of, or the remote control of people in the submarine underwater.

Obviously, remote control belongs to the existing technology (not very difficult), the most difficult thing is the waterproof sealing principle and the structure design of the underwater appliance that can dive deep and does not need to go ashore regularly to get rid of seepage water maintenance. This example illustrates the difficulty:

Take the submersible pump as an example, because the existing submersible pump has not solved the key problem of its waterproof seal, generally it can only be used underwater a few meters away from the water surface to receive the best results, and it must be suspended regularly. Pull it ashore and disassemble it to remove the water seepage maintenance in the pump (not repair after damage). The interval of "regular landing maintenance" is related to the diving depth of the submersible pump, because it is necessary to "regularly go ashore to remove water seepage maintenance". One point, people dare not expect to use super-power (for example: millions of watts) submersible pumps for underwater projects, because the weight of a super-power submersible pump cannot be very light, and it is difficult to "lift and pull it ashore" frequently Carry out maintenance to eliminate water seepage".

——The maximum diving depth of a general-purpose submarine will not exceed the order of magnitude of the depth of several hundred meters (less than 500 meters), and the super-kilometre submarine is the most important and important tool to assist people in directly detecting seabed combustible ice mineral resources. The direct device is also the most important underwater movable manned device that is indispensable in the process of direct remote control or supervision of the mining of combustible ice deposits on the seabed surface.

It is not difficult to see that only after the above-mentioned underwater appliance related to the present invention and meeting the requirements is technically solved, can the commercial mining problem of combustible ice on the surface of the seabed (low cost and able to generate profits) be realized. For this reason, China and other countries in the world have regarded all kinds of issues that can be included in the commercial exploitation of combustible ice as key research projects. Make a bedding with ice.

However, when solving the above problems, you can refer to the following invention patents that have been applied for:

"Submarine Electric Propeller Propeller Capable of Deep Diving Over 1000 Meters and Maintenance-free Allowing Oil to Waterproof and Seal" (Application No.: 201611059867.X) - Once a manned submarine serving for commercial combustible ice mining can be Come out, so, should not be a problem even more for the coming out of various other underwater appliances of commercialization service. Because, the principle of its waterproof seal and its matching structure are basically the same.

Obviously, the new working principle and supporting new structure of the above-mentioned invention patents are the same as the top-level structures deliberately designed according to conventional principles in the world, including China, which are only 12 for deep water exploration and capable of diving 6,500 meters deep. Submarines are different (extremely expensive), and such "deliberately" built submarines are difficult to achieve commercially (must be low cost). ——With the implementation of the above-mentioned invention patent (application number: 201611059867.X), it is possible to create at a very low cost the above-mentioned invention patent products that can also dive 6,500 meters deep or deeper. If the conditions are met, it creates conditions for the commercial use of combustible ice mining very early.

Claims (1)

1. A method for mining combustible ice on the surface of the seabed, including: the most common geological situation in which combustible ice deposits are distributed from top to bottom: seawater, combustible ice dew deposits covering the surface of seabed rocks; It is characterized by: 1. The underwater combustible ice dew deposits to be mined are crushed by the underwater hammer hammer A; 2. The crushed combustible ice fragments are excavated by the grab bucket of the excavator B and placed on the nearby underwater conveyor belt C, and then transported to the vertical collection and distribution lifting point D of the combustible ice dew deposit, and the Downwardly drop the combustible ice fragments located at the C end of the underwater conveyor belt into the lifting and sealing box E for temporary storage; 3. After the sealing box E is sealed, it can be hoisted and transported away from the mining area at any time; The operation of the underwater impact car hammer A, the underwater excavator B, the underwater conveyor belt C and the lifting and sealing box E is remotely controlled by the display of the underwater camera F; The underwater impact car hammer A, underwater excavator B, underwater conveyor belt C, lifting sealing box E and underwater camera F all have the waterproof and sealing performance that can be achieved by deep diving, and do not need Like the submersible pumps of the prior art, it is necessary to regularly leave the water for routine maintenance work to eliminate water seepage; The described waterproof sealing structure is the same as the patent application technology of "submarine electric propeller propeller capable of deep diving over 1000 meters and maintenance-free allowing oil to seal waterproof".