阅读说明：本技术 一种用于地热能双循环发电的传热装置 (Heat transfer device for geothermal energy double-cycle power generation ) 是由 黄长涛 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种用于地热能双循环发电的传热装置,包括传热装置,所述传热装置的外表面固定连接有降热损装置,所述传热装置的顶部固定连接有处理加压装置,所述传热装置的底部固定连接有进气块,所述降热损装置包括导热装置和外循环管,所述外循环管的内部开设有循环通孔,所述循环通孔相对面之间固定连接有导热装置,本发明涉及地热能发电技术领域。该用于地热能双循环发电的传热装置,通过将地下底部的高温蒸汽进行传导降温可以有效达到装置外侧的蒸汽二次利用,达到装置保温功能,并提高内部热转换效率,同时外循环管为密封管,在传输过程中不会将内部有害气体释放,提高装置安全性,保护工作人员作业。(The invention discloses a heat transfer device for geothermal energy double-cycle power generation, which comprises a heat transfer device, wherein a heat loss reducing device is fixedly connected to the outer surface of the heat transfer device, a processing and pressurizing device is fixedly connected to the top of the heat transfer device, an air inlet block is fixedly connected to the bottom of the heat transfer device, the heat loss reducing device comprises a heat conduction device and an outer circulation pipe, a circulation through hole is formed in the outer circulation pipe, and the heat conduction device is fixedly connected between opposite surfaces of the circulation through hole. This a heat transfer device for geothermal energy dual cycle electricity generation, the steam reutilization that can effectively reach the device outside through the high-temperature steam with secret bottom conducts the cooling reaches the device heat preservation function to improve inside heat conversion efficiency, the while extrinsic cycle pipe is the sealed tube, can not release inside harmful gas in transmission process, improves the device security, the operation of protection staff.)

1. A heat transfer device for geothermal energy double-cycle power generation comprises a heat transfer device (2), a heat loss reducing device (3) is fixedly connected to the outer surface of the heat transfer device (2), a processing and pressurizing device (1) is fixedly connected to the top of the heat transfer device (2), and an air inlet block (4) is fixedly connected to the bottom of the heat transfer device (2), and is characterized in that: the heat loss reducing device (3) comprises a heat conducting device (36) and an external circulating pipe (31), a circulating through hole (32) is formed in the external circulating pipe (31), and the heat conducting device (36) is fixedly connected between opposite surfaces of the circulating through hole (32);

the heat conducting device (36) comprises a condensing sheet (365) and a contact plate (361), a heat conducting sheet (363) is arranged at the concave position of the contact plate (361), and one side, close to the contact plate (361), of the heat conducting sheet (363) is fixedly connected to the side of the condensing sheet (365);

the heat transfer device (2) comprises a spiral pipe (23), the air inlet end of the spiral pipe (23) is communicated with the air inlet block (4), the middle of the outer surface of the spiral pipe (23) is fixedly connected with a flow limiting device (22), and the outer side of the spiral pipe (23) is provided with a pressurizing pipe (24);

the flow limiting device (22) comprises a connecting shaft (223) and a vibration cone block (221), the connecting shaft (223) is fixedly connected between opposite surfaces of the outer surface of the spiral pipe (23), and a double-layer flow limiting ring (224) is fixedly connected to the surface of the inner cavity of the spiral pipe (23).

2. A heat transfer unit for geothermal energy dual cycle power generation according to claim 1, wherein: the left side fixedly connected with transmission piece (34) of air inlet block (4), transmission piece (34) are linked together with air inlet block (4), the top fixedly connected with splitter box (35) of transmission piece (34), splitter box (35) fixed connection is in the left side of outer circulating pipe (31), and splitter box (35) are linked together with outer circulating pipe (31).

3. A heat transfer unit for geothermal energy dual cycle power generation according to claim 1, wherein: the front of contact plate (361) fixedly connected with fixed block (362), and the surface of fixed block (362) runs through outer circulating pipe (31) and extends to the inner chamber department of circulation through-hole (32), one side fixedly connected with water conservancy diversion bent plate (364) that contact plate (361) are kept away from in fixed block (362), the bottom fixedly connected with condensing disc (365) of water conservancy diversion bent plate (364).

4. A heat transfer unit for geothermal energy dual cycle power generation according to claim 1, wherein: the both ends of forcing pipe (24) are all fixed connection in the bottom of handling pressure device (1), and spiral pipe (23) set up the inboard position at forcing pipe (24), the surface fixed connection of forcing pipe (24) has heat transfer shell (21), the sunken department fixed connection of heat transfer shell (21) surface is in the surface department of outer circulating pipe (31).

5. A heat transfer unit for geothermal energy dual cycle power generation according to claim 1, wherein: the utility model discloses a vibration cone block, including vibration cone block (221), double-deck current-limiting ring (224), the intermediate layer of double-deck current-limiting ring (224) is overlapped and is established in the surface department of vibration cone block (221), the spacing short piece of department fixedly connected with (222) of vibration cone block (221) surface, the upper and lower fixed surface of double-deck current-limiting ring (224) is connected with stop button (225), and stop button (225) set up the upper and lower side department at vibration cone block (221).

6. A heat transfer unit for geothermal energy dual cycle power generation according to claim 1, wherein: the treatment pressurizing device (1) comprises a pressurizing shell (11), the bottom of the pressurizing shell (11) is fixedly connected to the upper surface of the heat transfer device (2), the top of the pressurizing shell (11) is fixedly connected with a liquid inlet pipe (16), and the liquid inlet pipe (16) is communicated with the lower end of a pressurizing pipe (24).

7. A heat transfer unit for geothermal energy dual cycle power generation according to claim 1, wherein: the left side fixedly connected with of pressurization shell (11) butt joint piece (15), the inner wall department fixedly connected with blast pipe (13) of pressurization shell (11), blast pipe (13) are linked together with butt joint piece (15), and blast pipe (13) are linked together with the higher one end of pressurized tube (24), the inside fixedly connected with inscription seal ring (14) of blast pipe (13), the interval department of inscription seal ring (14) is equipped with vibrating device (12).

8. A heat transfer unit for geothermal energy dual cycle power generation according to claim 1, wherein: vibrating device (12) are including vibrating mass (121), the surface cover of vibrating mass (121) is established in the outside of blast pipe (13), side recess (125) have been seted up to the surface of vibrating mass (121), the inner wall fixedly connected with pivot (122) of department of side recess (125), the surface rotation of pivot (122) is connected with rotatory piece (124), the one end fixedly connected with closure plate (123) of pivot (122) are kept away from in rotatory piece (124), closure plate (123) and the surperficial department looks adaptation of inscription closed ring (14).

Technical Field

The invention relates to the technical field of geothermal energy power generation, in particular to a heat transfer device for geothermal energy double-cycle power generation.

Background

A dual-cycle geothermal power generation system utilizes underground hot water or water vapor to heat a certain low-boiling point working medium, so that the working medium enters a geothermal power generation system with a steam turbine working, and the system is also called an intermediate medium method or low-boiling point working medium cycle. The system is a circulating system which is used for overcoming the defects of a flash evaporation geothermal power generation system.

In the existing heat transfer device for geothermal energy double-cycle power generation, because the heat transfer device is not provided with a good heat insulation material, when underground high-temperature and high-pressure water or water vapor comes, the heat transfer device cannot be well insulated, so that great heat energy loss is caused; meanwhile, as the underground high-temperature and high-pressure water or water vapor contains a lot of impurities, the impurities are adsorbed around the pipeline when entering the field in the guiding process, so that the blockage is caused, and the efficiency of the dual-cycle geothermal power generation system is reduced.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a heat transfer device for geothermal energy double-cycle power generation, which solves the problem of heat energy loss of underground high-temperature high-pressure water or water vapor.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a heat transfer device for geothermal energy double-cycle power generation comprises a heat transfer device, wherein a heat loss reducing device is fixedly connected to the outer surface of the heat transfer device, a processing and pressurizing device is fixedly connected to the top of the heat transfer device, an air inlet block is fixedly connected to the bottom of the heat transfer device, the heat loss reducing device comprises a heat conducting device and an outer circulating pipe, a circulating through hole is formed in the outer circulating pipe, and the heat conducting device is fixedly connected between opposite surfaces of the circulating through hole; the high-temperature steam at the bottom of the underground can be conducted and cooled to effectively achieve the steam secondary utilization outside the device, the heat preservation function of the device is achieved, the internal heat conversion efficiency is improved, and energy is saved. Meanwhile, the outer circulating pipe is a sealed pipe, so that harmful gas in the outer circulating pipe cannot be released in the transmission process, the safety of the device is improved, and the operation of workers is protected.

The heat conduction device comprises a condensation sheet and a contact plate, a heat conduction sheet is arranged at the concave part of the contact plate, and one side of the heat conduction sheet close to the contact plate is fixedly connected to the side of the condensation sheet;

the heat transfer device comprises a spiral pipe, the air inlet end of the spiral pipe is communicated with an air inlet block, the middle of the outer surface of the spiral pipe is fixedly connected with a flow limiting device, and a pressurizing pipe is arranged on the outer side of the spiral pipe;

the flow limiting device comprises a connecting shaft and a vibrating cone block, the connecting shaft is fixedly connected between opposite surfaces of the outer surface of the spiral pipe, and a double-layer flow limiting ring is fixedly connected to the surface of the inner cavity of the spiral pipe.

Preferably, the left side of the air inlet block is fixedly connected with a transmission block, the transmission block is communicated with the air inlet block, the top of the transmission block is fixedly connected with a diversion trench, the diversion trench is fixedly connected to the left side of the external circulation pipe, and the diversion trench is communicated with the external circulation pipe.

Preferably, the front surface of the contact plate is fixedly connected with a fixing block, the outer surface of the fixing block penetrates through the outer circulation pipe and extends to the inner cavity of the circulation through hole, one side of the fixing block, which is far away from the contact plate, is fixedly connected with a flow guide bent plate, and the bottom of the flow guide bent plate is fixedly connected with a condensation sheet. The water conservancy diversion bent plate is the S type setting, can increase circulation through-hole inner wall and underground high-temperature gas' S area of contact, reaches high-efficient heat conduction effect, and underground high-temperature gas is when the cooling liquefaction simultaneously, and the water conservancy diversion bent plate can reach certain water conservancy diversion effect, improves the inside circulation effect of circulation through-hole.

Preferably, both ends of the pressurizing pipe are fixedly connected to the bottom of the processing and pressurizing device, the spiral pipe is arranged at the inner side of the pressurizing pipe, the outer surface of the pressurizing pipe is fixedly connected with the heat transfer shell, and the concave part of the outer surface of the heat transfer shell is fixedly connected to the outer surface of the outer circulation pipe.

Preferably, the surface department at the vibration awl piece is established to the cover in the intermediate layer of double-deck current-limiting ring, the spacing short block of department fixedly connected with of middle of vibration awl piece surface, the upper and lower fixed surface of double-deck current-limiting ring is connected with the stop button, and the stop button setting is in the upper and lower side department of vibration awl piece. When underground high-temperature high-pressure gas passes through the double-layer flow limiting ring, the size of the air flow received by the vibration cone block is different from the direction of the cross section, so that the internal vibration cone block achieves an irregular vibration effect, and the underground high-temperature high-pressure gas is prevented from forming impurities on the inner wall of the circulating through hole when being liquefied, and a pipeline is plugged.

Preferably, the treatment pressurizing device comprises a pressurizing shell, the bottom of the pressurizing shell is fixedly connected to the upper surface of the heat transfer device, the top of the pressurizing shell is fixedly connected with a liquid inlet pipe, and the liquid inlet pipe is communicated with the lower end of the pressurizing pipe.

Preferably, the left side fixedly connected with butt joint piece of pressurization shell, the inner wall department fixedly connected with blast pipe of pressurization shell, the blast pipe is linked together with the butt joint piece, and the blast pipe is linked together with the higher one end of pressurized line, the inside fixedly connected with inscription closed loop of blast pipe, the interval department of inscription closed loop is equipped with vibrating device. The internal connection sealed ring is sealed when contacting the surface of the vibrating device, so that the pressurizing effect can be achieved, the heated gas circulates at the time, the pressurizing effect is achieved, and a pressure environment is provided for subsequent gas power generation.

Preferably, vibrating device includes the vibrating mass, the surface cover of vibrating mass is established in the outside of blast pipe, the side recess has been seted up to the surface of vibrating mass, the inner wall fixedly connected with pivot of department of side recess, the surface of pivot is rotated and is connected with rotatory piece, the one end fixedly connected with closure plate of pivot is kept away from to rotatory piece, closure plate and inscription sealed ring's surface department looks adaptation. When the vibrating block is subjected to the action of gas pressure, the rotating block rotates outwards to release the pressure gas, and when the vibrating block is subjected to the action of gas pressure, the rotating block rotates inwards to plug the exhaust pipe, so that the internal pressure of the pressurizing shell is kept uniform.

(III) advantageous effects

The invention provides a heat transfer device for geothermal energy double-cycle power generation. The method has the following beneficial effects:

the heat transfer device for geothermal energy double-cycle power generation can effectively achieve secondary utilization of steam outside the device by conducting and cooling high-temperature steam at the bottom of the underground, achieves the heat preservation function of the device, improves the internal heat conversion efficiency and saves energy. Meanwhile, the outer circulating pipe is a sealed pipe, so that harmful gas in the outer circulating pipe cannot be released in the transmission process, the safety of the device is improved, and the operation of workers is protected.

(II), this a heat transfer device for geothermal energy dual cycle electricity generation, be the setting of S type through the water conservancy diversion bent plate, can increase circulation through-hole inner wall and underground high-temperature gas' S area of contact, reach high-efficient heat conduction effect, underground high-temperature gas is when the cooling liquefaction simultaneously, and the water conservancy diversion bent plate can reach certain water conservancy diversion effect, improves the inside circulation effect of circulation through-hole.

(III), this a heat transfer device for geothermal energy dual cycle electricity generation, through when underground high temperature high pressure gas passes through double-deck restriction ring, because of the air current size that the vibration awl piece received is different with the cross-section direction for inside vibration awl piece reaches irregular vibration effect, prevents that underground high temperature high pressure gas can form impurity at the circulation through hole inner wall when the liquefaction, thereby plugs up the pipeline.

And (IV) the heat transfer device for the geothermal energy double-cycle power generation is sealed when the inner-connected sealed ring is in contact with the surface of the vibrating device, so that the pressurizing effect can be achieved, the heated gas is circulated for the time, the pressurizing effect is achieved, and a pressure environment is provided for the subsequent gas power generation.

According to the heat transfer device for geothermal energy double-cycle power generation, when the vibrating block is subjected to the action of gas pressure to be increased, the rotating block rotates outwards to achieve the action of releasing pressure gas, and when the vibrating block is subjected to the action of gas pressure to be decreased, the rotating block rotates inwards to achieve the effect of plugging the exhaust pipe, so that the internal pressure of the pressurizing shell is kept uniform.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a schematic cross-sectional view of the structure of the heat loss reducing device of the present invention;

FIG. 3 is a schematic structural diagram of a heat conducting device according to the present invention;

FIG. 4 is a schematic cross-sectional view of a heat transfer unit according to the present invention;

FIG. 5 is a schematic view of a current limiting device according to the present invention;

FIG. 6 is a schematic view of the structure of the processing press of the present invention;

fig. 7 is a schematic structural diagram of the vibration device of the present invention.

In the figure: 1. a treatment pressurization device; 11. a pressurized housing; 12. a vibrating device; 121. vibrating the block; 122. a rotating shaft; 123. a plugging plate; 124. rotating the block; 125. side grooves; 13. an exhaust pipe; 14. internally connecting a closed ring; 15. a butt joint block; 16. a liquid inlet pipe; 2. a heat transfer device; 21. a heat transfer shell; 22. a current limiting device; 221. vibrating the cone block; 222. a short limiting block; 223. a connecting shaft; 224. a double-layer flow-limiting ring; 225. a limit button; 23. a spiral tube; 24. a pressurizing pipe; 3. a heat loss reducing device; 31. an external circulation pipe; 32. a circulation through hole; 34. a transmission block; 35. a shunt slot; 36. a heat conducting device; 361. a contact plate; 362. a fixed block; 363. a heat conductive sheet; 364. a diversion bent plate; 365. a condensation sheet; 4. an air inlet block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

As shown in fig. 1-3, the present invention provides a technical solution: a heat transfer device for geothermal energy double-cycle power generation comprises a heat transfer device 2, wherein a heat loss reducing device 3 is fixedly connected to the outer surface of the heat transfer device 2, a processing and pressurizing device 1 is fixedly connected to the top of the heat transfer device 2, an air inlet block 4 is fixedly connected to the bottom of the heat transfer device 2, the heat loss reducing device 3 comprises a heat conducting device 36 and an external circulating pipe 31, a circulating through hole 32 is formed in the external circulating pipe 31, and the heat conducting device 36 is fixedly connected between opposite surfaces of the circulating through hole 32; the high-temperature steam at the bottom of the underground can be conducted and cooled to effectively achieve the steam secondary utilization outside the device, the heat preservation function of the device is achieved, the internal heat conversion efficiency is improved, and energy is saved. Meanwhile, the outer circulation pipe 31 is a sealed pipe, so that harmful gas in the outer circulation pipe cannot be released in the transmission process, the safety of the device is improved, and the operation of workers is protected.

The heat conducting device 36 comprises a condensing sheet 365 and a contact plate 361, a heat conducting sheet 363 is arranged at a concave position of the contact plate 361, and one side of the heat conducting sheet 363, which is close to the contact plate 361, is fixedly connected to the side of the condensing sheet 365;

the left side fixedly connected with transmission piece 34 of air intake block 4, transmission piece 34 is linked together with air intake block 4, the top fixedly connected with splitter box 35 of transmission piece 34, splitter box 35 fixed connection is in the left side of extrinsic cycle pipe 31, and splitter box 35 is linked together with extrinsic cycle pipe 31.

The front surface of the contact plate 361 is fixedly connected with a fixing block 362, the outer surface of the fixing block 362 penetrates through the external circulation pipe 31 and extends to the inner cavity of the circulation through hole 32, one side of the fixing block 362 far away from the contact plate 361 is fixedly connected with a flow guide bent plate 364, and the bottom of the flow guide bent plate 364 is fixedly connected with a condensing sheet 365. The water conservancy diversion bent plate 364 is the setting of S type, can increase circulation through hole 32 inner wall and underground high-temperature gas' S area of contact, reaches high-efficient heat conduction effect, and underground high-temperature gas is when the cooling liquefaction simultaneously, and water conservancy diversion bent plate 364 can reach certain water conservancy diversion effect, improves the inside circulation effect of circulation through hole 32.

The first embodiment has the following working steps:

step one, conducting and cooling high-temperature steam at the bottom of the underground can effectively achieve secondary utilization of the steam outside the device, achieve the heat preservation function of the device, improve the internal heat conversion efficiency and save energy. Meanwhile, the outer circulation pipe 31 is a sealed pipe, so that harmful gas in the outer circulation pipe cannot be released in the transmission process, the safety of the device is improved, and the operation of workers is protected.

And step two, the flow guide bent plate 364 is arranged in an S shape, so that the contact area between the inner wall of the circulating through hole 32 and the underground high-temperature gas can be increased, the high-efficiency heat conduction effect is achieved, meanwhile, when the underground high-temperature gas is cooled and liquefied, the flow guide bent plate 364 can achieve a certain flow guide effect, and the circulating effect inside the circulating through hole 32 is improved.

Example two

As shown in fig. 4-5, on the basis of the first embodiment, the present invention provides a technical solution: the heat transfer device 2 comprises a spiral pipe 23, the air inlet end of the spiral pipe 23 is communicated with the air inlet block 4, the middle of the outer surface of the spiral pipe 23 is fixedly connected with a flow limiting device 22, and a pressurizing pipe 24 is arranged on the outer side of the spiral pipe 23.

The flow limiting device 22 comprises a connecting shaft 223 and a vibration cone block 221, the connecting shaft 223 is fixedly connected between the opposite surfaces of the outer surface of the spiral pipe 23, and a double-layer flow limiting ring 224 is fixedly connected to the surface of the inner cavity of the spiral pipe 23.

Both ends of the pressurizing pipe 24 are fixedly connected to the bottom of the treatment pressurizing device 1, the spiral pipe 23 is arranged at the inner side of the pressurizing pipe 24, the outer surface of the pressurizing pipe 24 is fixedly connected with the heat transfer shell 21, and the concave part of the outer surface of the heat transfer shell 21 is fixedly connected to the outer surface of the outer circulation pipe 31.

The outer surface department at vibration awl piece 221 is established to the cover in the intermediate layer of double-deck restriction ring 224, the middle department fixedly connected with of vibration awl piece 221 surface is spacing short block 222, the last lower surface fixedly connected with limit button 225 of double-deck restriction ring 224, and limit button 225 sets up the upper and lower side department at vibration awl piece 221. When underground high temperature high pressure gas passes through double-deck restriction ring 224, because of the air current size that vibration awl piece 221 received is different with the cross-sectional direction for inside vibration awl piece 221 reaches irregular vibration effect, prevents that underground high temperature high pressure gas can form impurity at circulation through hole 32 inner wall when the liquefaction, thereby plugs up the pipeline.

The second embodiment has the following working steps:

when underground high temperature high pressure gas passes through double-deck restriction ring 224, because of the air current size that vibration awl piece 221 received is different with the cross-sectional direction for inside vibration awl piece 221 reaches irregular vibration effect, prevents that underground high temperature high pressure gas can form impurity at circulation through hole 32 inner wall when the liquefaction, thereby plugs up the pipeline.

EXAMPLE III

As shown in fig. 6-7, on the basis of the first embodiment and the second embodiment, the present invention provides a technical solution: the treatment pressurizing device 1 comprises a pressurizing shell 11, the bottom of the pressurizing shell 11 is fixedly connected to the upper surface of the heat transfer device 2, the top of the pressurizing shell 11 is fixedly connected with a liquid inlet pipe 16, and the liquid inlet pipe 16 is communicated with the lower end of a pressurizing pipe 24.

The left side fixedly connected with butt joint piece 15 of pressurization shell 11, the inner wall department fixedly connected with blast pipe 13 of pressurization shell 11, blast pipe 13 is linked together with butt joint piece 15, and blast pipe 13 is linked together with the higher one end of pressurized tube 24, the inside fixedly connected with inscription closed ring 14 of blast pipe 13, the interval department of inscription closed ring 14 is equipped with vibrating device 12. The internal connection sealed ring 14 is sealed when contacting the surface of the vibration device 12, so that the pressurization effect can be achieved, the heated gas circulates at the time, the pressurization effect is achieved, and a pressure environment is provided for subsequent gas power generation.

The vibrating device 12 includes the vibrating mass 121, the outer surface cover of vibrating mass 121 is established in the outside of blast pipe 13, side recess 125 has been seted up to the surface of vibrating mass 121, the inner wall fixedly connected with pivot 122 of side recess 125 department, the surface of pivot 122 rotates and is connected with rotatory piece 124, the one end fixedly connected with closure plate 123 of pivot 122 is kept away from to rotatory piece 124, closure plate 123 and the surperficial department looks adaptation of inscription closed ring 14. When the vibrating mass 121 is subjected to the action of gas pressure, the rotating mass 124 rotates outwards to release the pressure gas, and when the vibrating mass 121 is subjected to the action of gas pressure, the rotating mass 124 rotates inwards to block the exhaust pipe 13, so that the internal pressure of the pressurizing shell 11 is kept uniform.

The third embodiment has the following working steps:

in the first step, the inner connecting sealed ring 14 is sealed when contacting with the surface of the vibration device 12, so that the pressurizing effect can be achieved, the heated gas is circulated at the time, the pressurizing effect is achieved, and a pressure environment is provided for the subsequent gas power generation.

And step two, when the vibrating block 121 is subjected to the action of gas pressure to be increased, the rotating block 124 rotates outwards to achieve the action of releasing pressure gas, and when the vibrating block 121 is subjected to the action of gas pressure to be decreased, the rotating block 124 rotates inwards to achieve the action of blocking the exhaust pipe 13, so that the internal pressure of the pressurizing shell 11 is kept uniform.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.