Deep-water airlift start-up methods

FIELD: machine building.

SUBSTANCE: method involves lifting of elements of underwater mineral deposits consisting of flow of transporting medium, transportation of hydraulic fluid in supply airlift pipeline, supply of compressed air to mixer of lifting pipeline, creation of multicomponent mixture after compressed air is supplied to hydraulic fluid mixture and transportation of multicomponent mixture flow in lifting airlift pipeline. At that, first, phantom cross section is chosen in the flow intended for transportation of elements of underwater mineral deposits, and for chosen phantom cross section there specified is the range of change of pressure value. Flows of water and air-and-water mixture are created in supply and lifting pipelines by supplying compressed air with the compressor to mixer of lifting pipeline Value of actual pressure is monitored in the chosen phantom cross section, as well as actual range of change of the monitored value is determined. Compliance of the certain actual range to the specified one is checked, and elements of underwater mineral deposits are supplied to water flow of supply airlift pipeline in case certain actual range belongs to the specified one.

EFFECT: increasing development efficiency of underwater mineral deposits at big marine depths due to shortening the total start-up time of airlift plant; avoiding the disturbance of transportation of solid material and gumming of pipelines during airlift start-up.

2 cl, 3 dwg

 

The invention relates to mechanical engineering and can be used directly in the development of submarine mineral resources of the World ocean using airlifting units for the implementation of the rise of minerals with depth in the surface water of the pool.

There is a method of lifting the pulp, including the supply of compressed air compressor in the flow of water, further compression of the air during its transportation in the composition of the water-air mixture, the separation of members of the air flow of the mixture components, the flow extracted from the water-air mixture compressed air in the mixer airlift and disposal of generated water in the environment, and maintaining in the process of lifting the pulp of the desired value of the pressure in the mixer by adjusting the ratio of water and air in the air flow (patent of Ukraine # 30137 And class. AS 45/00, F04F 1/20, 2000).

The disadvantage of this method is the short duration of the operation of the airlift on performance due to the long course of the transients at the start of the airlift, which leads to low productivity and efficiency airlifting rise of the rock mass.

There is a method of lifting the pulp, including the supply of compressed air compressor in flow in the s, further compression of the air during its transportation in the composition of the water-air mixture, the separation of members of the air flow of the mixture components, the flow extracted from the water-air mixture compressed air in the mixer airlift and disposal of generated water in the environment, and maintaining in the process of lifting the pulp of the desired value of the pressure in the mixer by adjusting the ratio of water and air in the air flow (patent of Ukraine # 30137 And class. AS 45/00, F04F 1/20, 2000).

The disadvantage of this method is the short duration of the operation of the airlift on performance due to the long course of the transients at the start of the airlift, which leads to low productivity and efficiency airlifting rise of the rock mass.

The closest technological solution is the way to start the airlift, including overlapping messages lifting of the pipeline through the output section with the environment, the injection of compressed air into the upper part of the lifting pipe diverting water from the lifting of the pipeline through the supply line into the environment, stopping the discharge of compressed air in the lifting pipe when reaching into the upper part of the working pressure compressed in the spirit and resume messages lifting of the pipeline through the output section of the environment and simultaneously compressed air in the mixer lifting of the pipeline (ed. St. USSR №1629625 A1, CL F04F 1/18, 1991).

The disadvantage is the closest technological solutions is the short duration of the operation of the airlift on performance due to the long course of the transients at the start of the airlift, which leads to low productivity and efficiency airlifting rise of the rock mass.

The closest technological solution is the way to start the airlift, including overlapping messages lifting of the pipeline through the output section with the environment, the injection of compressed air into the upper part of the lifting pipe diverting water from the lifting of the pipeline through the supply line into the environment, stopping the discharge of compressed air in the lifting pipe when reaching into the upper part of the working pressure of the compressed air source and resume messages lifting of the pipeline through the output section of the environment and simultaneously compressed air in the mixer lifting of the pipeline (ed. St. USSR №1629625 A1, CL F04F 1/18, 1991).

The disadvantage is the closest technological solutions is the short duration of the operation of the airlift on performance due to the long course of the transients at the start of the airlift Thu what causes low productivity and efficiency airlifting rise of the rock mass.

The basis of the invention the task is improving the way you run deep-water airlift, in which, by monitoring during start-up of air pressure in transporting mineral feedstock stream, the efficiency of deep-water airlift-type of hydraulic lift of rock mass by increasing its productivity by extending the period of operation of the airlift on performance due to the reduced duration of the transients at the start of the airlift.

The problem is solved in such a way that the known method run deep-water airlift, including the lifting of items of underwater mineral deposits in the structure of the flow of the transporting medium, and the transportation of the slurry in the supply line of air, the compressed air in the mixer lifting of the pipeline, creating a multicomponent mixture after the admission of compressed air into the flow of slurry and transporting flow of multicomponent mixtures in lifting the pipeline airlift differs in accordance with the invention by the fact that pre-selects the conditional cross-section in the designated transportation elements of underwater mineral deposits flow and the selected conditional cross-sectional specify the range of the change of the pressure values create streams of water and water-air mixture in the inlet and lifting pipes by feeding compressed air compressor in the mixer lifting pipe, control the value of the actual pressure in the selected conditional cross-section, as well as determine the actual range of variation of the controlled value, check the compliance of a certain actual range given and served elements of underwater mineral deposits in the water flow of the inlet pipeline of the airlift in the case of certain facilities actual range to the target.

The basis of the invention the task is improving the way you run deep-water airlift, in which, by controlling the start of injection of the air speed of transporting raw materials flow, the efficiency of deep-water airlift-type of hydraulic lift of rock mass by increasing its productivity by extending the period of operation of the airlift on performance due to the reduced duration of the transients at the start of the airlift.

The problem is solved in such a way that the known method run deep-water airlift, including the lifting of items of underwater mineral deposits in the structure of the transport stream the existing environment, transporting the slurry in the supply line of air, the compressed air in the mixer lifting of the pipeline, creating a multicomponent mixture after the admission of compressed air into the flow of slurry and transporting flow of multicomponent mixtures in lifting the pipeline airlift differs in accordance with the invention by the fact that pre-selects the conditional cross-section in the designated transportation elements of underwater mineral deposits flow and the selected conditional cross-section set the velocity of flow, create streams of water and water-air mixture in the inlet and lifting pipes by feeding compressed air compressor in the mixer lifting pipe, control the magnitude of the actual velocity of the flow in the selected conditional cross-section, comparing the monitored value with the set and achieve their conformity with or exceeding the controlled value of the referenced elements serves underwater mineral deposits in the water flow of the inlet pipeline of the airlift.

Consider the implementation of the developed methods run deep-water airlift in case of using famous of the existing prior art configuration of technical means.

In the figure 1 image is of Agen scheme airlifting installation and on figures 2 and 3 revealed marked in sites I and II, respectively.

Airlifting the installation includes inlet 1 and lifting 2 pipelines, compressor 3 with 4 suction and discharge 5 piping that is installed on the lifting pipe 2 air-purge drum 6, is in communication with the discharge pipe 5 mixer 7 lifting pipe 1 installed in the composition of the suction pipe 4, the filter 8 connected to the supply line 1 pressure gauge 9 and the sensor determine the magnitude of the velocity of the stream 10, with the discharge line 5 is equipped with a check valve 11 and controlled by valves 12, 13.

Pre-select conditional cross-sections A-a and B-B are intended for the transportation elements of underwater mineral deposits pipeline system formed connected via the mixer 7 of the inlet 1 and lift 2 pipelines. For the selected conditional cross-sections A-a and B-B represent respectively the range of changes of the pressure and velocity of flow conveying medium as the main technological parameters. With regard to the functioning of airlifting install the control set values most appropriate to implement in the flow of the mixture of liquid and solid material of the slurry. Therefore, PR is the implementation of the developed methods to rationally choose conditional cross-section of the inlet pipe 1. Before you start airlifting install all managed valves 12 and 13 are completely closed.

Open controlled valves 12 and 13, as well as run the compressor 3. Compressed by the compressor 3, the air flows through the discharge pipe 5 through controlled valves 12, 13, the check valve 11 to the mixer 7. Consequently, lifting the pipeline 2 reduced pressure, and begins the process of forming the water-air mixture flow, which is transitive. A decrease in the pressure in the lifting pipe 2 ensures the supply of water under hydrostatic pressure in the inlet pipe 1 into the mixer 7. While the distribution of compressed air along the length of the lifting pipe 2 pressure continues to decrease.

Thus, there is a flow of the transporting medium, which in lifting the pipeline 2 presents the air / water mixture, and in the supply line 1 is water.

Simultaneously with the supply of compressed air to the mixer 7 through 9 gauge or sensor determine the magnitude of the velocity of the stream is 10 begin to control respectively the value of the actual pressure in the selected conditional cross-section a-a or the value of the actual velocity of the flow in the conditional cross-section B-B. Determine the actual range of essentiality pressure, and also check the compliance of a certain actual range to the specified range or compare the magnitude of the actual velocity of the stream with the set of its corresponding value. Perform the supply of mineral raw materials in the flow of the water supply pipe 1 when reaching toiletries actual range of pressure values to a specified range, or the correspondence between the actual and preset values of the flow velocity, or in case of exceeding the actual value of the flow velocity given its proper value. This organization run deep airlifting hydraulic lift of mineral raw materials leads to a reduction in the duration of the transients at the start of the airlift and the extension of the period of operation of the airlift on performance, which improves performance and efficiency of hydraulic lift.

In the case of considerable depth development of simultaneous compressed air supply to the mixer 7 and mineral raw materials in the supply line 1 will slow down the spread of compressed air along the length of the lifting of the pipeline 2 by reducing water flow in the supply line 1 due to the countercurrent movement of mineral raw materials in the lower conditional cross-section. This increases the period of formation of sustainable protractor is related threads in the inlet 1 and lifting 2 pipelines, necessary to ensure the operational efficiency of marine mining complex.

Thus, the use of the claimed invention will increase the efficiency of the development of underwater mineral deposits at great ocean depths by reducing the total time of start airlifting installation and guarantees the avoidance of disruption of transportation of solid material and, as a consequence, tastybaby transport pipeline during start-up of airlift.

1. Start deep-water airlift, including the lifting of items of underwater mineral deposits in the structure of the flow of the transporting medium, and the transportation of the slurry in the supply line of air, the compressed air in the mixer lifting of the pipeline, creating a multicomponent mixture after the admission of compressed air into the flow of slurry and transporting flow of multicomponent mixtures in lifting the pipeline airlift, wherein the pre-select conditional cross-section in the designated transportation elements of underwater mineral deposits flow and the selected conditional cross-sectional specify the range of change of the amount of pressure, creating streams of water and water-air mixture in the inlet and on yumnam pipelines by compressed air compressor in the mixer lifting of the pipeline, control the actual pressure in the selected conditional cross-section, as well as determine the actual range of variation of the controlled value, check the compliance of a certain actual range given and served elements of underwater mineral deposits in the water flow of the inlet pipeline of the airlift in the case of certain facilities actual range to the target.

2. Start deep-water airlift, including the lifting of items of underwater mineral deposits in the structure of the flow of the transporting medium, and the transportation of the slurry in the supply line of air, the compressed air in the mixer lifting of the pipeline, creating a multicomponent mixture after the admission of compressed air into the flow of slurry and transporting flow of multicomponent mixtures in lifting the pipeline airlift, wherein the pre-select conditional cross-section in the designated transportation elements of underwater mineral deposits flow and the selected conditional cross-section set the velocity of flow, create streams of water and water-air mixture in the inlet and lifting pipelines respectively by compressed by the compressor air in the mixer is themega pipeline control the magnitude of the actual velocity of the flow in the selected conditional cross-section, comparing the monitored value with the set and achieve their conformity with or exceeding the controlled value of the referenced elements serves underwater mineral deposits in the water flow of the inlet pipeline of the airlift.



 

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FIELD: mining.

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2 dwg

FIELD: mining.

SUBSTANCE: invention refers to mining and can be implemented at complex industrial development of mineral resources of world ocean. The package consists of a transport floating sea-based station in kind of a semi-submersible floating platform with an underwater hydraulic support-container. On the platform there is made a through vertical shaft and above-surface decks. The following is arranged on the station: a hydraulically hoisted installation consisting of a hoisted pipeline of interconnected pipes installed in the shaft of the hydraulic support-container. In its upper part the pipeline communicates with an unloading hopper and with a receiving chamber also connected with a cavity of the hydraulic support-container by means of the pipeline. In its lower part the pipeline is coupled with a collector. The installation also consists of an evaporating system connected to a condenser via a steam line and to the unloading hopper via an evacuating pipeline. The evaporating system is equipped with a heating battery and a brine chamber coupled with the unloading hopper by means of the pipeline. Further, the installation consists of a thermo-siphon of a nuclear plant connected with the heating battery of the evaporating system through the steam line. The thermo-siphon is connected with its own condenser by means of the steam line and pressure line. The condenser of the thermo-siphon is installed under the condenser of the evaporating system and coupled with the latter by means of a down-take pipeline. Also the installation consists of bottom excavating devices tied with the collector of the hoisted pipeline by means of slurry lines. The novelty of the invention is like follows: additional through shafts are made in the hydraulic support container. The additional shafts have inter-shaft through slit apertures communicating the additional shafts and the shaft of the hoisted pipeline. Also there are the thermo-siphon of the nuclear plant and bottom excavating devices installed in these shafts. Under water the excavating devices automatically retract from the shafts and enter into them together with connected pipelines, steam lines, slurry lines and other communications freely arranged in the inter-shaft through slit apertures. Notably, to eliminate clogging, equipped with valves branches of blow-off main are connected to hinged facilities. Novelty of the procedure of package operation and transport condition consists in retracting equipment, including the hoisted pipeline, from the shafts and under water lowering, in hoisting it back and receiving it into shafts together with communications coupled and connected to equipment. Thus, submerged floating stations are attributed with controlled, correspondingly, negative or positive buoyancy.

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7 cl, 10 dwg

FIELD: mining.

SUBSTANCE: invention refers to mining and can be implemented for under water development of rock. The procedure for under water development of rock consists in excavation, in piling rock on an ice floe, and in transporting the ice floe to a place of stock piling on basin bottom. The basin is limited with a dam constructed up to a coastal strip and having an opening from the side of the ice floe transported with rock. Further, the ice floe is driven to negative floatability. When part of the basin is filled with ice floes with rock, the opening is blocked; rock is excavated upon melting and supplied to a concentrating installation erected on a shore. Further, ice floes with rock are stacked in an adjacent part of the basin divided with a common dam between the basins.

EFFECT: raised efficiency, reduced power consumption for transport operations, and reduced ecological damage to water medium caused with mining operations.

2 dwg

FIELD: mining.

SUBSTANCE: method to extract materials from thick underground formations is carried out by means of formation opening with a well, placement of a well hydraulic monitor unit in it, creation of a naturally balanced vault above a production chamber within the productive horizon and washout of formation rocks with pulp delivery to the surface. In order to increase efficiency of well hydraulic production of minerals, excessive pressure is pulled in the production chamber, which meets the following condition: Pchamb.≥Pform.+0.03 MPa, where: Pchamb. - pressure of working fluid in the production chamber, Pform. - formation pressure. At the same time the pressure in the chamber is continuously monitored with sensor installed in lower and upper parts of a movable pipe of the hydraulic monitor unit, and the excessive pressure in the production chamber is provided by control of the working fluid supply into the well, with high-quality of hydraulic insulation of the annular space with mortars based on bentonite powders with specific viscosity from 50 sec. until "non-liquid" state.

EFFECT: higher efficiency of well hydraulic production of minerals.

2 cl, 1 dwg

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