CN111853534A - Device for recycling CNG cold energy by using circulating water - Google Patents
Device for recycling CNG cold energy by using circulating water Download PDFInfo
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- CN111853534A CN111853534A CN202010720702.2A CN202010720702A CN111853534A CN 111853534 A CN111853534 A CN 111853534A CN 202010720702 A CN202010720702 A CN 202010720702A CN 111853534 A CN111853534 A CN 111853534A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0337—Heat exchange with the fluid by cooling
- F17C2227/0341—Heat exchange with the fluid by cooling using another fluid
- F17C2227/0348—Water cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0337—Heat exchange with the fluid by cooling
- F17C2227/0365—Heat exchange with the fluid by cooling with recovery of heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0367—Localisation of heat exchange
- F17C2227/0388—Localisation of heat exchange separate
- F17C2227/0395—Localisation of heat exchange separate using a submerged heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/04—Methods for emptying or filling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/03—Treating the boil-off
- F17C2265/032—Treating the boil-off by recovery
- F17C2265/033—Treating the boil-off by recovery with cooling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The invention discloses a device for recycling CNG cold energy by using circulating water, which comprises a multi-stage pressure reducing pipe, wherein one end of the multi-stage pressure reducing pipe is provided with a pressure reducing valve, and the outer side of the pressure reducing pipe is sleeved with a circulating water pipe; a rotating pipe is rotatably arranged in the pressure reducing pipe, and a plurality of blades are arranged on the rotating pipe along the circumferential direction; one end of the rotating pipe is connected with a driving bevel gear; the impeller is rotatably arranged in the circulating water pipe and positioned outside the pressure reducing pipe, a circle of bevel gear is arranged on the impeller, and the bevel gear is in meshing transmission with the driving bevel gear; a spiral pushing blade is arranged in the rotating pipe, a plurality of water flow channels are arranged in the blade, and the water flow channels are communicated with the rotating pipe; the blades are arranged in the pressure reducing pipe, so that the pressure energy in the CNG pressure reducing process is effectively recycled; meanwhile, a circulating water pipe is arranged outside the pressure reducing pipe to recover cold energy generated in the CNG pressure reducing process; in addition, through setting up the impeller, can effectively provide the power of carrying of the water in the circulating water pipe, effectively realize reducing energy consumption and saving manufacturing cost.
Description
Technical Field
The invention relates to the technical field of compressed natural gas cold energy recovery, in particular to a device for recovering CNG cold energy by using circulating water.
Background
In order to facilitate transportation of natural gas, natural gas is usually compressed to form CNG (compressed natural gas), the compressed natural gas has a pressure of 20-25MPa, while the natural gas pressure really needed in the process of use by a user is only about 0.6MPa, which requires depressurization of the high-pressure natural gas; because natural gas absorbs heat in the process from high pressure to low pressure and releases a large amount of cold energy, the problem of condensation in the pressure reducing pipe in the pressure reducing process is caused, and pressure energy generated in the pressure reducing process cannot be recovered, so that the waste of resources is caused; meanwhile, the cold energy recovery process in the prior art needs to be recovered through circulating water, but because the pressure reduction is generally multi-stage pressure reduction, the pressure difference of each stage also causes different flow rates of the circulating water, the water flow rate cannot be matched according to the change of the pressure energy, and the cold energy absorption efficiency is greatly reduced.
Disclosure of Invention
The invention aims to provide a device for recovering CNG cold energy by using circulating water aiming at the defects in the technology, and aims to solve the problems that the cold energy and pressure generated in the pressure reduction process of high-pressure natural gas cannot be recovered and converted, and the flow rate of the circulating water cannot be adjusted according to the pressure energy.
The invention provides a device for recycling CNG cold energy by using circulating water, which comprises a multi-stage pressure reducing pipe, wherein one end of the multi-stage pressure reducing pipe is provided with a pressure reducing valve, and the outer side of the pressure reducing pipe is sleeved with a circulating water pipe; a rotating pipe is rotatably arranged in the pressure reducing pipe, and a plurality of blades are arranged on the rotating pipe along the circumferential direction; one end of the rotating pipe is connected with a driving bevel gear; the impeller is rotatably arranged in the circulating water pipe and positioned outside the pressure reducing pipe, a circle of bevel teeth are arranged on the impeller, and the bevel teeth are in meshing transmission with the driving bevel gear; the spiral pushing blade is arranged in the rotating pipe, a plurality of water flow channels are arranged in the blade, and the water flow channels are communicated with the rotating pipe.
Furthermore, the device also comprises a one-way limiting device, wherein the one-way limiting device is provided with one end of the rotating pipe so as to limit the rotating direction of the rotating pipe, so that the rotating pipe can rotate anticlockwise or clockwise.
Furthermore, bosses are arranged on two sides of the pressure reducing pipe, and two ends of the rotating pipe are rotatably connected into the bosses through sealing bearings.
Furthermore, the one-way limiting device comprises a ratchet wheel and a pawl, the ratchet wheel is connected to the rotating pipe, the pawl is hinged to the boss, and the pawl and the ratchet wheel are in one-way locking fit.
Further, the circulating water pipe is provided with an annular part, the limiting bearing is located in the annular part, and an inner ring of the limiting bearing is sleeved on an outer ring of the impeller, so that the impeller can be rotatably arranged in the circulating water pipe.
Furthermore, water inlet ends are arranged on two sides of the circulating water pipe, and the water inlet ends are located at the front end of the pressure reducing pipe.
Further, the anti-leakage device further comprises a sealing sleeve cover, wherein the sealing sleeve cover is sleeved on the boss on one side of the pressure reducing pipe to seal the one-way limiting device.
Further, the spring is further included, one end of the spring is connected to the boss, and the other end of the spring is connected to the pawl.
Further, the spiral pushing blade penetrates through the rotating pipe, and the water flow channel is arranged in the impeller in an arc shape.
Furthermore, a flow-limiting round block is arranged in the middle of the rotating pipe, the spiral pushing blades are positioned on two sides of the flow-limiting round block, the water flow channel is arranged in the impeller in an arc shape, so that the water inlet end of the water flow channel is positioned on one side of the flow-limiting round block, and the water outlet end of the water flow channel is positioned on the other side of the flow-limiting round block.
Compared with the prior art, the method has the following beneficial effects:
1. the blades are arranged in the pressure reducing pipe, so that the pressure energy in the CNG pressure reducing process is effectively recycled;
2. the cold energy generated in the CNG pressure reduction process is recovered by arranging a circulating water pipe outside the pressure reduction pipe;
3. the driving bevel gear is driven by the blades to drive the impeller to rotate so as to improve the water flow speed in the circulating water pipe, thereby quickly recovering cold energy generated in the pressure reduction process of CNG and effectively reducing the problem of condensation in the pressure reduction pipe;
4. the driving bevel gear is driven by the blades to drive the impeller to rotate so that the pressure energy of pressure reduction is matched with the rotating speed of the impeller, and therefore when multi-stage pressure reduction is realized, under the condition of different pressure levels, the rotating speeds of the impellers are different, the circulating water flow speed is different, the water flow speed is automatically adjusted according to the pressure energy generated in the pressure reduction process, and the recovery efficiency of cold energy is greatly improved;
5. the problem that the impeller rotates reversely to slow down the water flow speed is solved by arranging the one-way limiting device;
6. the spiral pushing blades are arranged in the rotating pipe, and the water flow channels are arranged on the blades, so that water flows in the rotating pipe and the blades, cold energy is recovered for the rotating pipe and the blades in the pressure reducing pipe, and the problem of condensation of the rotating pipe and the blades is solved;
7. by arranging the impeller, the conveying power of water in the circulating water pipe can be effectively provided, and energy loss is effectively reduced and production cost is saved;
8. through the arrangement of the blades, the natural gas can be further depressurized by recycling pressure energy, so that the number of stages of depressurization is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic view of an apparatus for recovering CNG cold energy using circulating water according to the present invention;
fig. 2 is an axial view of an apparatus for recovering CNG cold energy using circulating water according to the present invention;
FIG. 3 is a sectional view of a pressure reducing pipe of the apparatus for recovering CNG cold energy using circulating water according to the present invention;
fig. 4 is a top view of an apparatus for recovering CNG cold energy using circulating water according to the present invention;
fig. 5 is a sectional view of a-a of an apparatus for recovering CNG cold energy using circulating water according to the present invention;
fig. 6 is a partially enlarged schematic view a of an apparatus for recovering CNG cold energy using circulating water according to the present invention;
fig. 7 is a schematic enlarged partial view B of an apparatus for recovering CNG cold energy using circulating water according to the present invention;
fig. 8 is a schematic view of part C of an apparatus for recovering CNG cold energy using circulating water according to the present invention;
fig. 9 is a schematic enlarged partial view D of an apparatus for recovering CNG cold energy using circulating water according to the present invention;
fig. 10 is a schematic diagram of an apparatus for recovering CNG cold energy using circulating water according to embodiment 4 of the present invention.
In the figure, 1-a pressure reducing pipe; 2-a pressure reducing valve; 3-a circulating water pipe; 4-pipe rotation; 5-blade; 6-drive bevel gear; 7-an impeller; 8-spiral leaf pushing; 9-one-way limiting device; 10-sealing the bearing; 11-a boss; 20-limit bearing; 30-sealing sleeve cover; 31-a ring-shaped portion; 32-water inlet end; 41-current limiting round block; 51-a water flow channel; 71-bevel gear; 91-ratchet wheel; 92-a pawl; 93-spring.
Detailed Description
For a better understanding of the present invention, its structure, and the functional features and advantages attained by its structure, reference is made to the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings, in which:
example 1:
as shown in fig. 1 to 9, the invention provides a device for recovering CNG cold energy by using circulating water, which comprises a multistage pressure reducing pipe 1, wherein one end of the multistage pressure reducing pipe 1 is provided with a pressure reducing valve 2, so that natural gas with 20-25MPa is reduced to the use pressure of 0.6MPa by the multistage pressure reducing pipe 1; the outer side of the pressure reducing pipe 1 is sleeved with a circulating water pipe 3 so as to absorb cold energy generated in the pressure reducing process in the pressure reducing pipe 1 through the circulating water pipe 3; a rotating pipe 4 is rotatably arranged in the pressure reducing pipe 1, a plurality of blades 5 are arranged on the rotating pipe 4 along the circumferential direction, and the blades 5 are of a semicircular structure so that the blades 5 can rotate along the airflow direction; specifically, when the pressure reducing valve 2 can be opened, natural gas can rapidly flow to the pressure reducing pipe 1 under the action of pressure to push the blades 5 to rotate, and the pressure energy in the CNG pressure reducing process is effectively recycled by arranging the blades 5 in the pressure reducing pipe 1; one end of the rotating pipe 4 is connected with a driving bevel gear 71 wheel 6 so as to drive the blades 5 to rotate through the air pressure flow velocity, so that the rotating pipe 4 is driven to rotate, and the driving bevel gear 71 wheel 6 connected to the rotating pipe 4 rotates; the water circulation device also comprises an impeller 7, wherein the impeller 7 is rotatably arranged in the water circulation pipe 3 and positioned outside the pressure reducing pipe 1, a circle of bevel teeth 71 are arranged on the impeller 7, the bevel teeth 71 are in meshing transmission with the driving bevel teeth 71 and the driving bevel teeth 6, so that the driving bevel teeth 71 and the driving bevel teeth 6 are meshed with each other to rotate together when the rotating pipe 4 rotates, so that the speed of water flow in the water circulation pipe 3 is increased, and the conveying power of; meanwhile, the blades 5 drive the driving bevel gear 71 and the gear 6 to drive the impeller 7 to rotate so as to improve the water flow speed in the circulating water pipe 3, thereby quickly recovering cold energy generated in the pressure reduction process of the CNG and effectively reducing the problem of condensation in the pressure reduction pipe 1; in addition, through setting up impeller 7, can effectively provide the power of carrying of the water in circulating pipe 3, effectively realize reducing energy consumption and saving manufacturing cost. A spiral pushing blade 8 is arranged in the rotating pipe 4, so that water in the circulating water pipe 3 is introduced into the rotating pipe 4 through the spiral pushing blade 8 to reduce the problem of condensation of the rotating pipe 4; a plurality of water flow passages 5151 are arranged in the blade 5, and the water flow passages 5151 are communicated with the rotating pipe 4 so as to flow into the blade 5 through the water flow in the rotating pipe 4, thereby reducing the occurrence of the problem of condensation of the blade 5.
Specifically, circulating water pipe 3 on multistage pressure reducing pipe 1 accessible sets up blade 5 in first order pressure reducing pipe 1 and drives impeller 7 and rotate, and at this moment, all be connected with circulating water pipe 3 between the multistage pressure reducing pipe 1. Further, the multistage pressure reducing pipe 1 can be provided with blades 5 at each stage to drive the impeller 7 to rotate, at the moment, the multistage pressure reducing pipe 1 needs to recover cold energy through the independent circulating water pipe 3 so as to prevent the problem of water flow impact caused by different rotating speeds of the impeller 7 at different stages, and the single blade 5 is arranged on the first stage pressure reducing pipe 1 in the multistage pressure reducing pipe 1 to drive the impeller 7 to rotate; all set up blade 5 drive impeller 7 and rotate in multistage pressure reduction pipe 1, can effectively reduce the condensation problem in the pressure reduction pipe 1, and still effectively improve cold energy recovery efficiency. Meanwhile, after the circulating water pipes 3 on the pressure reducing pipes 1 at different stages are independently opened, the recovery efficiency of cold energy can be improved, so that the cold energy recovery of the pressure reducing pipe 1 at the next stage by the water absorbed by the preceding stage is prevented, the recovery amount of the cold energy is effectively improved, and the problem of condensation of the pressure reducing pipe 1 at the next stage is effectively prevented; in addition, the pressure energy can be recycled to realize the further pressure reduction effect on the natural gas so as to reduce the pressure reduction stage number.
Specifically, the water circulation device further comprises a limiting bearing 20, the water circulation pipe 3 is provided with an annular part 31, the limiting bearing 20 is positioned in the annular part 31, and an inner ring of the limiting bearing 20 is sleeved on an outer ring of the impeller 7, so that the impeller 7 can be rotatably arranged in the water circulation pipe 3; the driving bevel gear 71 is driven by the blades 5 to drive the impeller 7 to rotate so as to improve the water flow speed in the circulating water pipe 3, thereby quickly recovering cold energy generated in the pressure reduction process of CNG and effectively reducing the problem of condensation in the pressure reduction pipe 1.
Specifically, water inlet ends 32 are arranged on two sides of the circulating water pipe 3, and the water inlet ends 32 are positioned at the front end of the pressure reducing pipe 1, so that the cold energy absorption and recovery efficiency of the pressure reducing pipe 1 is improved by water inlet on two sides; the recovered cold energy flows into the equipment needing temperature reduction or the cold energy storage equipment through the circulating water pipe 3.
Example 2:
as shown in fig. 3 and fig. 6, in combination with the technical solution of embodiment 1, in this embodiment, the device for recovering CNG cold energy by using circulating water further includes a one-way limiting device 9, the one-way limiting device 9 is provided with one end of the rotating pipe 4 to limit the rotating direction of the rotating pipe 4, so that the rotating pipe 4 rotates counterclockwise or clockwise, the driving bevel gear 71 at one end of the rotating pipe 4 rotates to drive the impeller 7 to rotate, and the impeller 7 rotates to drive the water velocity in the circulating water pipe 3 to increase; and through setting up one-way stop device 9 to prevent impeller 7 reversal and slow down the problem of water velocity.
Specifically, the bosses 11 are arranged on two sides of the pressure reducing pipe 1, and two ends of the rotating pipe 4 are rotatably connected in the bosses 11 through the sealing bearings 10, so that the problem that natural gas enters the circulating water pipe 3 from the joint of the rotating pipe 4 and the bosses 11 is solved.
Specifically, the one-way limiting device 9 comprises a ratchet wheel 91 and a pawl 92, the ratchet wheel 91 is connected to the rotating pipe 4, and the pawl 92 is hinged to the boss 11, so that the pawl 92 does not clamp the ratchet wheel 91 in the process of clockwise or counterclockwise rotation of the ratchet wheel 91, the clockwise or counterclockwise rotation freedom of the ratchet wheel 91 is released, the rotation freedom of the ratchet wheel 91 in the other direction is restricted, one-way locking matching between the pawl 92 and the ratchet wheel 91 is realized, namely, the impeller 7 can only rotate in one direction, and the problem that the impeller 7 rotates reversely and impacts water flow to slow down water flow is solved.
Specifically, the reverse locking device further comprises a spring 93, one end of the spring 93 is connected to the boss 11, the other end of the spring 93 is connected to the pawl 92, and by arranging the spring 93, the flexibility of the pawl 92 can be effectively improved, so that the reverse locking efficiency of the rotary pipe 4 is improved.
Example 3:
as shown in fig. 7 to 9, in combination with the technical solutions of embodiment 1 and embodiment 2, in this embodiment, the device for recovering CNG cold energy by using circulating water further includes a sealing cover 30, and the sealing cover 30 is sleeved on the boss 11 on one side of the depressurization pipe 1 to seal the one-way limiting device 9, so as to reduce the water flow in the circulating water pipe 3 from entering the one-way limiting device 9.
Specifically, the middle of the rotating pipe 4 is provided with a flow-limiting circular block 41, the spiral pushing blades 8 are located on two sides of the flow-limiting circular block 41, the water flow channel 51 is arranged in the impeller 7 in an arc shape, so that the water inlet end 32 of the water flow channel 51 is located on one side of the flow-limiting circular block 41, the water outlet end of the water flow channel 51 is located on the other side of the flow-limiting circular block 41, and the flow-limiting circular block 41 is provided with a through hole for limiting the flow of water flowing into the rotating pipe 4, so that the spiral pushing blades 8 at the water inlet end 32 of the rotating pipe 4 push a part of water into the water flow channel 51, and then the water in the water flow channel 51 is pushed into the circulating water pipe 3 by the spiral pushing blades 8 at the water outlet end of the rotating pipe 4, so as to improve the flow rate of the water in the blades 5, thereby greatly.
Example 4:
as shown in fig. 10, the difference between this embodiment and embodiment 3 is that the spiral pushing blade 8 passes through the rotary pipe 4, the water flow channel 51 is arranged in the impeller 7 in an arc shape, and the water flow channel 51 is communicated with the front end and the rear end of the rotary pipe 4, so that water can flow through the water flow channel 51, thereby reducing the occurrence of the problem of condensation of the blade 5; through set up spiral propelling movement leaf 8 in the rotating pipe 4 and set up rivers passageway 5151 on blade 5 to realize rivers and flow in rotating pipe 4 and blade 5, thereby carry out cold energy to rotating pipe 4 and blade 5 that are located depressurization pipe 1 and retrieve, with the problem that reduces rotating pipe 4 and blade 5 and appear the condensation.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Those skilled in the art can make many possible variations and modifications to the disclosed solution, or modify equivalent embodiments using the teachings set forth above, without departing from the scope of the claimed solution. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technology of the present invention are within the protection scope of the present invention, unless the content of the technical solution of the present invention is departed from.
Claims (10)
1. A device for recycling CNG cold energy by using circulating water is characterized by comprising a multi-stage pressure reducing pipe (1), wherein one end of the multi-stage pressure reducing pipe (1) is provided with a pressure reducing valve (2), and the outer side of the pressure reducing pipe (1) is sleeved with a circulating water pipe (3); a rotating pipe (4) is rotatably arranged in the pressure reducing pipe (1), and a plurality of blades (5) are arranged on the rotating pipe (4) along the circumferential direction; one end of the rotating pipe (4) is connected with a driving bevel gear (71) wheel (6); the water circulation pipe is characterized by further comprising an impeller (7), wherein the impeller (7) is rotatably arranged in the water circulation pipe (3) and located outside the pressure reducing pipe (1), a circle of bevel teeth (71) are arranged on the impeller (7), and the bevel teeth (71) are in meshing transmission with the driving bevel teeth (71) and the wheel (6); the spiral pushing blade (8) is arranged in the rotating pipe (4), a plurality of water flow channels (51) are arranged in the blades (5), and the water flow channels (51) are communicated with the rotating pipe (4).
2. The device for recovering CNG cold energy by using circulating water according to claim 1, further comprising a one-way limiting device (9), wherein the one-way limiting device (9) is provided with one end of the rotary pipe (4) to limit the rotation direction of the rotary pipe (4) so as to enable the rotary pipe (4) to rotate anticlockwise or clockwise.
3. The device for recovering CNG cold energy by using circulating water as claimed in claim 2, wherein bosses (11) are arranged on two sides of the pressure reducing pipe (1), and two ends of the rotating pipe (4) are rotatably connected in the bosses (11) through sealing bearings (10).
4. A device for recovering CNG cold energy by using circulating water according to claim 3, wherein the one-way limiting device (9) comprises a ratchet wheel (91) and a pawl (92), the ratchet wheel (91) is connected to the rotary pipe (4), the pawl (92) is hinged to the boss (11), and the pawl (92) is in one-way locking fit with the ratchet wheel (91).
5. The device for recovering CNG cold energy by using circulating water according to claim 1, further comprising a limit bearing (20), wherein the circulating water pipe (3) is provided with an annular part (31), the limit bearing (20) is located in the annular part (31), and an inner ring of the limit bearing (20) is sleeved on an outer ring of the impeller (7) so that the impeller (7) can be rotatably arranged in the circulating water pipe (3).
6. The device for recovering CNG cold energy by using circulating water according to claim 1, wherein water inlet ends (32) are arranged on two sides of the circulating water pipe (3), and the water inlet ends (32) are positioned at the front end of the pressure reducing pipe (1).
7. The device for recycling CNG cold energy by using circulating water as claimed in claim 5, further comprising a sealing cover (30), wherein the sealing cover (30) is sleeved on the boss (11) on one side of the depressurization pipe (1) to seal the one-way limiting device (9).
8. An apparatus for recovering CNG cold energy by using circulating water according to claim 4, further comprising a spring (93), wherein one end of the spring (93) is connected to the boss (11), and the other end of the spring (93) is connected to the pawl (92).
9. An apparatus for recovering CNG cold energy using circulating water according to any one of claims 1 to 8, wherein said spiral push blades (8) pass through said rotary pipe (4), and said water flow passage (51) is arcuately provided in said impeller (7).
10. An apparatus for recovering cold energy of CNG (compressed natural gas) by using circulating water according to any one of claims 1 to 8, wherein the middle of the rotary pipe (4) is provided with a flow-limiting circular block (41), the spiral propelling blades (8) are arranged at two sides of the flow-limiting circular block (41), the water flow channel (51) is arranged in the impeller (7) in an arc shape, so that the water inlet end (32) of the water flow channel (51) is arranged at one side of the flow-limiting circular block (41), and the water outlet end of the water flow channel (51) is arranged at the other side of the flow-limiting circular block (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010720702.2A CN111853534B (en) | 2020-07-24 | 2020-07-24 | Device for recycling CNG cold energy by using circulating water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010720702.2A CN111853534B (en) | 2020-07-24 | 2020-07-24 | Device for recycling CNG cold energy by using circulating water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111853534A true CN111853534A (en) | 2020-10-30 |
| CN111853534B CN111853534B (en) | 2022-01-25 |
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| CN203881182U (en) * | 2014-04-25 | 2014-10-15 | 武汉工程大学 | Automatic mechanical water-saving heat exchange device |
| CN204070221U (en) * | 2014-07-08 | 2015-01-07 | 宁波海宝渔具有限公司 | A kind of spool can the fishing reel of unidirectional spline |
| CN209623009U (en) * | 2019-03-04 | 2019-11-12 | 常德市鼎城九申管道燃气有限公司 | Heat exchange blower fan is used in a kind of recycling of LNG cold energy |
| CN209705712U (en) * | 2019-02-25 | 2019-11-29 | 常德市鼎城九申管道燃气有限公司 | A kind of LNG-CNG gas station cold energy utilization system |
| CN211005436U (en) * | 2019-10-30 | 2020-07-14 | 内蒙古华禹农牧机械有限公司 | Horizontal type crystallization aid |
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| US20080080139A1 (en) * | 2006-09-29 | 2008-04-03 | Stanley Gavin D | Impeller and aligned cold plate |
| CN203881182U (en) * | 2014-04-25 | 2014-10-15 | 武汉工程大学 | Automatic mechanical water-saving heat exchange device |
| CN204070221U (en) * | 2014-07-08 | 2015-01-07 | 宁波海宝渔具有限公司 | A kind of spool can the fishing reel of unidirectional spline |
| CN209705712U (en) * | 2019-02-25 | 2019-11-29 | 常德市鼎城九申管道燃气有限公司 | A kind of LNG-CNG gas station cold energy utilization system |
| CN209623009U (en) * | 2019-03-04 | 2019-11-12 | 常德市鼎城九申管道燃气有限公司 | Heat exchange blower fan is used in a kind of recycling of LNG cold energy |
| CN211005436U (en) * | 2019-10-30 | 2020-07-14 | 内蒙古华禹农牧机械有限公司 | Horizontal type crystallization aid |
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| CN111853534B (en) | 2022-01-25 |
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