Method for starting and operating of offshore airlift and system for its implementation

FIELD: mining.

SUBSTANCE: group of inventions relates to mechanical engineering and can be used directly in development of subsea mineral deposits, where mineral components are pumped out by airlift. Method for starting and operating of offshore airlift includes pumping out of components from subsea mineral deposits as a part of hydromixture, supply of compressed air into mixer of lifting pipe, creation of multicomponent mixture after the compressed air is injected into hydromixture flow, and transporting of multicomponent mixture flow in lifting pipe of offshore airlift. In this method pressure value of air-water mixture is pre-defined in operating mixer of lifting pipe, where compressed air is supplied from compressor during airlift operation at its operating performance rate. Then compressed air is supplied from compressor into lifting pipe mixer, which is located above operating mixer, the air localised in accumulator is additionally compressed up to the pressure in operating mixer by supplying sea water into said accumulator under its static pressure. Then this additionally compressed air is supplied into operating mixer, pressure of sea water in operating mixer is monitored during the process of compressed air supply into it, measured pressure value is compared with pre-defined target value and as soon as they become equal supply of compressed air into said mixer is stopped, as well as supply of sea water into accumulator, while compressed air from compressor is supplied simultaneously into operating mixer through accumulator. After that, during offshore airlift operation, accumulator is charged with compressed air from compressor by means of parallel supply of sea water from said accumulator into operating mixer, when a difference is established between supply of compressed air from compressor to accumulator and supply of compressed air from accumulator to operating mixer.

EFFECT: improvement of method for starting and operating of offshore airlift, as well as system for its implementation.

3 cl, 4 dwg

 

The invention relates to mechanical engineering and can be used directly in the development of underwater mineral deposits, lifting elements which are using the airlift.

A known method of running the airlift, which includes the compressed high pressure air in the air-gate the upper part of the riser pipe, displacement of water through the receiving device, followed by compressed air working pressure in the mixer, and the displacement of water do to achieve the lifting pipe working pressure, then open the gate and simultaneously start the supply of compressed air working pressure in the mixer, (ed. St. USSR №1629625 A1, CL F04F 1/18, 1991).

The disadvantages of this method are: insufficient to start reducing the pressure in the mixer riser pipe marine airlift at significant depths and locations of the mixer, which corresponds to a large depth development of underwater mineral deposits, and the low efficiency of the start of the airlift in a known manner, due to the rapid filling of the offshore ocean water riser pipe when opening installed on it the gate that will lead to a rapid increase in pressure in the mixer, which may lead to the termination of receipt of his compressed air from the compressor.

Known airlifting installation with how it starts airlift, which contains a source of compressed air, lifting the pipe with a gate valve, a receiver, a mixer, and is equipped with a controlled valve and pressure gauge becoming the pipeline, which is a source of compressed air is communicated with the upper part of the riser pipe, (ed. St. USSR №1629625 A1, CL F04F 1/18, 1991).

The disadvantages of the known airlifting installation is insufficient to start the reduction of pressure in the mixer riser pipe marine airlift at significant depths and locations of the mixer, which corresponds to a large depth development of underwater mineral deposits, and low efficiency start the installation, due to the rapid filling of the offshore ocean water riser pipe when opening installed on it the gate that will lead to a rapid increase in pressure in the mixer, which may lead to the termination of receipt of his compressed air from the compressor.

The closest technological solution is the way of lifting the pulp, which includes the supply of compressed air to the mixer via the air duct in the composition of the water-air mixture, the regulation of the pressure in the mixer by varying the ratio of water and air, with pre-set the desired amount of air pressure in sosite is e, and in the process of lifting the pulp support this value by adjusting the ratio of water and air, followed by the abstraction of water in the annulus at the bottom of the vertical section of the duct (patent of Ukraine №A. CL ES 45/00, F04F 1/20, 2000).

The disadvantage is the closest technological solutions is the use of high-performance pump for boosting up the pressure in the mixer of the riser pipe and pre-compressed by the air compressor that provides the start of the airlift.

The closest technical solution is airlifting installation for lifting the pulp, which contains the lifting pipe, the camera feed to the pipe, inlet pipe, faucet riser pipe, pump and discharge piping, installed on the lifting pipe air-purge drum, a compressor with a corresponding discharge piping, installed in the intermediate cross-section of the pressure line from the pump to the separator provided with the environment and the separator tube, the sensors determine the cost of liquid and compressed gas, while the discharge line of the pump is communicated with mixer riser pipe and the discharge pipe of the compressor is communicated through an additional mixer to the discharge tube of the pump (patent RBM is ins No. 30137 And, CL ES 45/00, F04F 1/20, 2000).

The disadvantage is the closest technical solution is the use of high performance pump for boosting up the pressure in the mixer of the riser pipe and pre-compressed by the air compressor that provides start airlifting installation.

The basis of the invention the task is improving the way you start and functioning of marine airlift, in which, by monitoring during start-up of air pressure water-air mixture in the working faucet of the riser pipe, which is compressed by the air compressor during operation of the airlift on its operating characteristics, it is possible to reduce the arrangement of the working faucet of the riser pipe, that is necessary at considerable depths in the development of underwater mineral deposits and in order to secure the admission of compressed air in all faucets of the riser pipe at the start of the airlift using the resource static pressure of the sea water of the ocean for the boosting of the compressed air compressor until the pressure in the working mixer except in the technological processes of pumps and energy-intensive high-capacity compressors.

The problem is solved in such a way that there is a method of launching and functioning of marine airlift, including the store lifting elements of underwater mineral deposits in the composition of the slurry, the compressed air in the mixer of the riser pipe, the creation of a multicomponent mixture after the admission of compressed air into the flow of slurry and transporting flow of multicomponent mixtures in lifting the pipe marine airlift, which is in accordance with the invention differs in that the pre-set pressure value water-air mixture in the working faucet of the riser pipe, which is compressed by the air compressor during operation of the airlift on its operating characteristics, serves compressed by the compressor air in the mixer of the riser pipe, which is located above the operation of the mixer, win localized in the battery compressed air to the pressure in the working mixer by filing in the battery Maritime waters under its static pressure, serves doraty the air in a working mixer, control the pressure of the sea water of the ocean in your mixer at the time of filing it dogalogo air, comparing the monitored value with the set and achieve their compliance with the cease compressed by the air compressor in the mixer and marine waters in the battery while simultaneously compressed by the air compressor through the battery in a working mixer, and then in the process of marine airlift charge the battery compressed by the compressor vozduhopotok parallel flow concentrated in the battery Maritime waters of the ocean in a working mixer when establishing the difference between compressed by the air compressor to the battery and compressed air battery in working the mixer.

The basis of the invention the task is improving the system for launching and functioning of marine airlift, in which, by introducing additional elements and compounds known in the design concept, it is possible to reduce the arrangement of the working faucet of the riser pipe, which is compressed by the air compressor during operation of the airlift on its operating characteristics, that is necessary at considerable depths in the development of underwater mineral deposits, and guaranteed admission of compressed air in all faucets of the riser pipe at the start of the airlift using the resource static pressure of the sea water of the ocean for the boosting of the compressed air compressor until the pressure in the working mixer, except that in the technological processes of pumps and energy-intensive high-capacity compressors with rational configuration of technical means.

The problem is solved in such a way that a known system for launching and functioning of marine airlift containing lifting and inlet pipe, the compressor discharge piping that is installed on the lifting pipe air-purge drum connected to the discharge pipe of the compressor, the battery provided with credo and battery separate tube and communicated with the discharge pipe of the compressor mixer riser pipe, in accordance with the invention differs in that the lifting pipe contains a working mixer, a separate nozzle is equipped with a controlled valve, the top and bottom of the battery is connected through equipped with controllable valves nozzles with a working mixer, the suction pipe of the compressor contains a filter and communicated with the air-purge drum, the battery contains a level switch liquid, the discharge line is equipped with controllable valves and non-return valves through which the compressor is communicated with the mixers of the riser pipe, the sensor pressure gauge communicated with a working mixer, and the level of immersion in a pool of sea water ocean mixer exceeds the level of immersion of the working of the mixer, which, in its the queue exceeds the level of immersion of the battery. In addition, the battery system is located on the composition of the inlet pipe marine airlift.

In figures 1, 2, 3 and 4 shows a diagram of a system for implementing the method of launching and functioning of marine airlift.

System for launching and functioning of marine airlift contains lifting 1 and inlet 2 pipe, the compressor 3 to the discharge pipe 4 mounted on the lifting tube 1 air-purge drum 5 provided with the discharge pipe 4 and is the first on the composition of the inlet pipe 2 (see 3, 4) battery 6 communicated with the environment and battery 6 separate pipe 7 provided with a discharge pipe 4 mixer 8 of the riser pipe 1, and the lifting tube 1 contains a working mixer 9, a separate nozzle 7 is equipped with a controlled valve 10, the top and bottom of the battery 6 is communicated through equipped with controllable valves 11, 12 nozzles 13, 14 with a working mixer 9, the suction pipe 15 of the compressor 3 includes a filter 16 and is communicated with the air-purge drum 5, a battery 6 is an indicator of the liquid level 17, the discharge pipe 4 is equipped with controllable valves 18, 19 and check valves 20, 21, through which the compressor 3 is communicated with the mixers 8, 9 of the riser pipe 1, respectively, the sensor pressure gauge 22 is communicated with a working mixer 9, and the level of immersion in a pool of sea water ocean mixer 8 exceeds the level of immersion of the working of the mixer 9, which, in turn, exceeds the level of immersion of the battery 6. The system further comprises a control unit 23.

The method using a system for launching and functioning of marine airlift is implemented as follows.

Pre-set pressure value water-air mixture in the working mixer 9 of the riser pipe 1, as the main breadboard the th parameter. Before launching system for launching and functioning of marine airlift all managed valves 10, 11, 12, 18 and 19 is fully closed, and the battery 6 is filled with air.

The control unit 23 opens managed valves 18 and 19, and runs the compressor 3. Compressed by the compressor 3, the air flows through the discharge pipe 4 through a controlled valve 18, the check valve 20 into the mixer 8 and managed through the valve 19, the check valve 21 in the battery 6. Consequently, there is a flow of compressed air compressor 3 to the lifting tube 1 through the mixer 8, which provides a partial reduction in pressure in the working mixer 9, and the charge compressed by the compressor 3 air battery 6.

After distribution of the water-air mixture in the lifting tube 1 from the mixer 8 to the air-purge drum 5, the control unit 23 opens managed valves 10 and 11, and the flow of sea water ocean under static pressure supplied to the battery 6, where he digimet compressed by the compressor 3 the air pressure in your mixer 9. While check valves 20 and 21 prevent the formation of a column of sea water ocean in the vertical portion of the discharge pipe 4. Partial reduction in operating the mixer 9 pressure achieved thanks to the inlet compressed by the compressor 3 of the air through the mixer 8 to the lifting tube 1, and de is appropriate to focus on battery 6 compressed air power Archimedes provides assured flow of compressed air in deeply located at significant depths in the development of subsea fields minerals work mixer 9 of the riser pipe 1 at the start of the airlift using the resource static pressure of the sea water of the ocean for the boosting compressed by the compressor 3 air until the pressure in the working mixer 9, except that in the technological processes of pumps and energy-intensive high-capacity compressors.

Simultaneously with the opening of the controlled valve 10 and 11, the control unit 23 using 22 gauge begins to control the pressure in the working mixer 9 and comparing the monitored value with a preset. With the increase in receipts from the battery 6 through the working of the mixer 9 to the lifting tube 1 compressed air, the pressure in the working mixer 9 is reduced. When pressure air / water mix in your mixer 9 a specified value, the control unit 23 stops compressed by the compressor 3 of the air in the mixer 8 and marine waters in the battery 6, coming from the environment, managed by closing valves 18 and 10 respectively. As a consequence, the entire volume compressed by the compressor 3 of the air passing through the discharge pipe 4, through the working volume of the battery 6 and communicated with the upper part of the pipe 13 enters the work mixer 9 of the riser pipe 1.

During operation of the system for launching and functioning of marine airlift on its working Hara is the characteristics fulfill the battery 6 with compressed air compressor 3 as follows.

When receiving compressed by the compressor 3 of the air through the discharge pipe 4, the working volume of the battery 6 and communicated with the upper part of the pipe 13 into the working of the mixer 9, the control unit 23 increases the resistance to the passage of compressed air through the pipe 13 by reducing the size of the opening of the controlled valve 11 and partially opens the controllable valve 12, which is equipped with a pipe 14 through which the bottom part of the battery 6 is communicated with a working mixer 9. Consequently concentrated in the accumulator 6 sea ocean water starts to enter the work mixer 9, and the feed rate is compressed by the compressor 3 air battery 6 exceeds the amount of compressed air from the battery 6 to the working mixer 9, which provides charging of the battery 6 is compressed by the compressor 3 by air. Compressed air supply from the battery 6 to the working mixer 9 in the process of charging the battery 6 is compressed by the compressor 3 provides a reduced air pressure in the working mixer 9, which supports airlifting effect in lifting the pipe 1. After a decrease in marine waters in the battery 6 is below the stated level switch liquid level 17, the control unit 23 stops charging the battery 6 is compressed by the compressor 3 air by completely closing the controlled valve 12 and pornolaetitia controlled valve 11 with the following operation systems on their performance.

Concentration is connected with the rod inlet pipe 2 battery 6 compressed air can partially compensate for the weight lifting 1 and inlet 2 pipe system.

Immediately before the stop of the system for launching and functioning of marine airlift control unit 23 completely covers all managed valves 10, 11, 12, 18 and 19, with subsequent stop of the compressor 3.

Re-launching system for launching and functioning of marine airlift is not different from the above technology system startup.

Thus, the use of the claimed invention will improve the efficiency of the development of underwater mineral deposits at great depths of the oceans by increasing the magnitude of the dip in the swimming pool of sea water ocean desktop mixer 9 of the riser pipe 1 and increase productivity airlifting rise.

1. The method of launching and functioning of marine airlift, including the lifting of items of underwater mineral deposits in the composition of the slurry, the flow of compressed air into the mixer of the riser pipe, the creation of a multicomponent mixture after the admission of compressed air into the flow of slurry and transporting flow of multicomponent mixtures in lifting the pipe marine airlift, wherein the pre-set Velich the well pressure water-air mixture in the working faucet of the riser pipe, which is compressed by the air compressor during operation of the airlift on its operating characteristics, serves compressed by the compressor air in the mixer of the riser pipe, which is located above the operation of the mixer, win localized in the battery compressed air to the pressure in the working mixer by filing in the battery Maritime waters under its static pressure, serves doraty the air in a working mixer, control the pressure of the sea water of the ocean in your mixer at the time of filing it dogalogo air, comparing the monitored value with the set and achieve their compliance with the cease compressed by the air compressor in the mixer and marine waters in the battery is simultaneously compressed by the air compressor through the battery in a working mixer, and then in the process of marine airlift charge the battery with compressed air compressor by parallel flow concentrated in the battery Maritime waters of the ocean in a working mixer when establishing the difference between compressed by the air compressor to the battery and compressed air supply from the battery to work the mixer.

2. System for launching and functioning of marine airlift containing lifting and inlet pipe, the compressor discharge Trou what prevodom, mounted on the lifting pipe air-purge drum connected to the discharge pipe of the compressor, the battery provided with the environment and battery separate tube and communicated with the discharge pipe of the compressor mixer riser pipe, characterized in that the lifting pipe contains a working mixer, a separate nozzle is equipped with a controlled valve, the top and bottom of the battery is connected through equipped with controllable valves nozzles with a working mixer, the suction pipe of the compressor contains a filter and communicated with the air-purge drum, the battery contains a level switch liquid, the discharge line is equipped with controllable valves and non-return valves through which the compressor is communicated with the mixers of the riser pipe, the sensor pressure - the pressure gauge is in communication with a working mixer, and the level of immersion in a pool of sea water ocean mixer exceeds the level of immersion of the working of the mixer, which, in turn, exceeds the level of immersion of the battery.

3. The system according to claim 2, wherein the battery is positioned on the rod supply pipe marine airlift.



 

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FIELD: mechanical engineering, particularly underwater mineral deposit mining.

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EFFECT: increased efficiency of continuous underwater mineral deposit element lifting due to increased marine hydraulic rams.

2 cl, 5 dwg

FIELD: mechanical engineering, particularly underwater mineral deposit mining.

SUBSTANCE: method involves lifting underwater mineral deposit members included in hydraulic mixture; creating multi-component mixture; injecting compressed air into hydraulic mixture flow; transporting multi-component mixture flow inside lifting pipe of marine airlift; supplying compressed air into separate water flow along with following conveyance of compressed air included in water-air mixture and supplying compressed air extracted from water-air mixture flow to lifting pipe of marine airlift. First of all hydraulic mixture flow rate in airlift supply pipe is set. Ocean stream energy is converted into electric power to be supplied to electric drives of airlift compressor and pump. Hydraulic mixture rate in marine airlift supply pipe is controlled and said controlled value is compared with predetermine value to provide equality between both values by regulation of depth of electric power station submersion in ocean. Said electric power station converts ocean stream energy into electric power.

EFFECT: increased lifting efficiency and ecological safety of underground mineral mining due to possibility of supplementary natural energy source usage.

2 cl, 6 dwg

FIELD: obtaining minerals from underwater, particularly to produce ferromanganesian concretions from Baltic sea shelf in the case of low concretion depth.

SUBSTANCE: concretion production device comprises main watercraft, receiving means and winch mounted on the watercraft, as well as angle pulleys, head and rear haulage ropes, perforated vessel having rectangular cross-section and provided with cutting edges and locking means. Device also has movable means for rear haulage rope angle pulley fixation in space. The movable means is made as supplementary watercraft fastened to main one by means of two steel wire rope branches. The steel rope passes over additional angle pulley arranged on supplementary watercraft. Free steel rope ends are fastened to drum of additional winch installed on main watercraft. Running wheels are arranged in upper vessel part by means of holders so that they may cooperate with both steel wire rope branches in top and bottom parts thereof and displace above branches in longitudinal direction. Vessel locking means is made as rotary sector connected with crank installed on vessel side wall through connecting-rod. Crank may cooperate with curvilinear strap supported by main watercraft. Rear haulage rope is fastened to upper sector edge. Both winches are secured to rotary platform, which may rotate in horizontal plane with respect to main watercraft body. Distance between steel wire rope branches exceeds vessel width. Additional angle pulley diameter exceeds that of angle pulley of rear haulage rope. Both pulleys are in axial alignment with each other and provided with means, which prevents rope dislodgement.

EFFECT: increased efficiency of concretion production equipment due to decreased labor inputs and increased concretion output.

6 dwg

FIELD: mineral mining, particularly obtaining minerals from underwater.

SUBSTANCE: rig comprises frame provided with floating pontoon supports, compressor, electromagnetic valves, concretion accumulation vessel, drum reels fixed with electric drives and endless chains with buckets. Each bucket comprises gas and float chambers and chamber filling device. Each float chamber has bellows hermetically connected to float chamber bottom and metal plate. Bellow interiors are communicated with armored continuous gas-distribution pipe passing over drums. Float chambers may reduce bellows volumes from one side of the chain and increase bellow volumes from another side thereof. Rig also has additional frames provided with propeller screws, air harness including poles and automatic harness control device. The automatic harness control device comprises force transducer and wind direction sensor. Wind direction sensor includes distinguishing plate provided with constant magnet, which cooperates with reed switches by means of magnetic field. The reed switches are arranged on annular fixed support. Wind force transducer includes pipe, cylindrical vessel, float and rod cooperating with microswitch. The cylindrical vessel is connected with pipe.

EFFECT: decreased power inputs for rig moving over water area and mineral lifting from ocean bed and extended range of technological capabilities.

9 cl, 37 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining industry and can be used in dredging of thawed placers. Method includes removal of dead ground from dredging site, digging of drainage trench, pre-dredging of sand layer, removal of boulders, flooding and dredging of sands. Pre-dredging is performed over the uncovered area through sand blading by backhoe excavator, which draws transverse juds in travelling trench.

EFFECT: improved dredger performance, reduced loss of mineral in the soil, and lower unit costs of dredging of hard-dredging placers.

2 cl, 2 dwg

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