CN117685698B - Vertical low-pressure circulation barrel and vertical barrel pump refrigerating system - Google Patents
Vertical low-pressure circulation barrel and vertical barrel pump refrigerating system Download PDFInfo
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- CN117685698B CN117685698B CN202410156106.4A CN202410156106A CN117685698B CN 117685698 B CN117685698 B CN 117685698B CN 202410156106 A CN202410156106 A CN 202410156106A CN 117685698 B CN117685698 B CN 117685698B
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- 239000007788 liquid Substances 0.000 claims abstract description 177
- 238000000926 separation method Methods 0.000 claims abstract description 74
- 239000006260 foam Substances 0.000 claims abstract description 44
- 239000003507 refrigerant Substances 0.000 claims abstract description 37
- 230000005484 gravity Effects 0.000 claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 238000005057 refrigeration Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 4
- 238000004781 supercooling Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 14
- 230000000694 effects Effects 0.000 description 13
- 230000009286 beneficial effect Effects 0.000 description 10
- 239000003921 oil Substances 0.000 description 10
- 238000001914 filtration Methods 0.000 description 9
- 229910021529 ammonia Inorganic materials 0.000 description 7
- 239000003595 mist Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000003116 impacting effect Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011555 saturated liquid Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 239000013526 supercooled liquid Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The invention relates to a vertical low-pressure circulating barrel and a vertical barrel pump refrigerating system, and belongs to the technical field of gas-liquid separation devices. The vertical low-pressure circulating barrel comprises a barrel body, and the air inlet pipe is eccentrically arranged at the upper part of the barrel body; a porous plate is arranged in the cylinder body and divides the cylinder body into an upper cylinder body and a lower cylinder body; the upper cylinder is internally provided with a separation cylinder, a fine wire mesh foam remover and a coarse wire mesh foam remover, a baffle is arranged at the bottom end of the fine wire mesh foam remover, the separation cylinder is sleeved outside the fine wire mesh foam remover, a coil pipe is arranged between the separation cylinder and the fine wire mesh foam remover, a cyclone separation space is arranged between the separation cylinder and the inner wall of the cylinder, the coarse wire mesh foam remover is arranged at the bottom of the separation cylinder, and a gravity separation space is arranged between the fine wire mesh foam remover and the coarse wire mesh foam remover; the vertical barrel pump refrigerating system comprises a compressor, a condenser, a liquid storage device, an evaporator, a refrigerant conveying pump and a vertical low-pressure circulating barrel. The low-pressure circulation barrel adopts gravity separation, impact separation and cyclone separation technologies, and can effectively separate liquid drops and gas.
Description
Technical Field
The invention relates to a vertical low-pressure circulating barrel and a vertical barrel pump refrigerating system, and belongs to the technical field of gas-liquid separation devices.
Background
The low-pressure circulation barrel is used in a barrel pump liquid supply refrigerating system, fully supplies liquid to the shielding pump, and simultaneously plays a role of a gas-liquid separator to ensure that gaseous refrigerating working medium flows into the air suction of the compressor.
However, both conventional horizontal and vertical low pressure circulation tanks have some problems. The horizontal low-pressure circulation barrel is usually separated by gravity separation or combined impact separation, which results in long separation distance and huge container volume, thereby occupying a large amount of equipment space and increasing the complexity of equipment initial investment and civil engineering planning.
For vertical low pressure circulation barrels, gravity separation or combined impact separation is also commonly adopted, but due to the need of arranging a shielding pump and considering the height of cavitation residue, the height of a container can be very high, which can be limited by the whole height of equipment, so that the separation space is insufficient, the separation effect is poor, and a large number of liquid drops are carried in the separated gas.
In addition, the existing low-pressure circulation tanks are mostly focused on solving the separation problem, but neglecting the liquid storage amount. In an ammonia refrigeration system, the filling amount of ammonia is strictly limited according to the regulations of major hazard source identification, and in order to ensure the safe operation of the system, the storage amount of ammonia should be reduced as much as possible on the premise that the operation condition is met. Currently, the problem of stock solution has become a new concern for safe operation. Since the conventional low pressure circulation tank focuses only on the separation problem, two problems are caused. First, many vertical low pressure circulation tanks employ the same diameter designs from top to bottom, and for vertical tanks employing gravity separation, the upper portion may require a larger diameter to achieve better separation results, resulting in an excessive lower liquid holding volume. Second, to reduce the liquid storage space, the lower part needs to be changed into a liquid bag with smaller diameter, which requires more complex process, such as opening holes of the end socket, and increases the cost.
Disclosure of Invention
The invention aims to provide a new technical scheme for improving or solving the technical problems that the separation effect is poor and a large number of liquid drops are contained in the separated gas in the prior art.
The technical scheme provided by the invention is as follows: the vertical low-pressure circulating barrel comprises a barrel body, wherein a flange is arranged above the barrel body, a lower sealing head is arranged below the barrel body, the flange and the lower sealing head are connected together to form a sealing cavity, an air inlet pipe, an air outlet pipe, a liquid inlet pipe and a liquid outlet pipe are further arranged on the barrel body, and the air inlet pipe is eccentrically arranged on the upper part of the barrel body; a porous plate is arranged in the cylinder body and divides the cylinder body into an upper cylinder body and a lower cylinder body; the utility model discloses a cyclone separator, including upper cylinder, fine wire mesh foam remover, coarse wire mesh foam remover, fine wire mesh foam remover is cylindric, the baffle is installed to the bottom of fine wire mesh foam remover, the spacer sleeve is established outside the fine wire mesh foam remover, the spacer with set up the coil pipe between the fine wire mesh foam remover, the spacer with form cyclone separation space between the inner wall of cylinder, the coarse wire mesh foam remover is installed the bottom of spacer, gravity separation space between fine wire mesh foam remover and the coarse wire mesh foam remover.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
1. The vertical low-pressure circulation barrel adopts a gravity separation technology and an impact separation technology, also adopts a cyclone separation technology, can very effectively separate liquid drops and gas, ensures that the suction of a compressor does not carry liquid, and has better separation effect and high separation efficiency compared with the conventional vertical low-pressure circulation barrel.
2. Compared with the conventional gravity separation technology, the cyclone separation technology has the advantages that the diameter of the vertical barrel needed by the cyclone separation technology is much smaller than that of the vertical barrel in a gravity separation mode from theoretical calculation and actual measurement verification, so that the same separation effect is achieved. Compared with the existing common vertical low-pressure liquid storage device and horizontal low-pressure circulating barrel, the invention has great advantages in the aspects of separation efficiency and occupied space, can obviously simplify the system design and civil engineering difficulty, and reduces the initial investment requirement.
3. The coil is arranged in the vertical low-pressure circulation barrel, and high-temperature and high-pressure refrigerant condensed liquid is connected into the coil in the operation process, so that supercooling of the refrigerant liquid can be realized, and micro liquid drops contained in gas to be filtered in the fine wire mesh demister are heated and evaporated at the same time, so that the separation efficiency of the gas is further improved.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the porous plate is provided with a central hole, the diameter of the central hole is smaller than the outer diameter of the coarse silk screen foam remover, and a plurality of through holes are arranged around the central hole in a divergent mode.
The adoption of the further scheme has the beneficial effect that the porous plate plays a role in impact separation.
Further, the diameter of the through hole gradually increases from the center to the outer edge.
The further scheme has the beneficial effects that the diameter of the through hole which is closer to the cylinder wall is larger, so that not only can the air flow not blow the liquid level directly, but also the liquid drop can be ensured to smoothly flow down along the cylinder wall and not be accumulated.
Further, the vertical distance between the porous plate and the separation cylinder is 50 mm-100 mm.
The adoption of the further scheme has the beneficial effects that the interval between the porous plate and the separation barrel is too large, the impact separation effect is not achieved, liquid drops are not easy to drop, the interval is too small, larger resistance is easy to cause, and the impact separation effect can be effectively exerted by the porous plate through the adoption of the arrangement, so that the liquid drops smoothly drop. Meanwhile, the excessive resistance is avoided in the distance range, and the normal operation of the system is ensured.
Further, the coarse silk screen foam remover adopts a double-layer porous plate, and stainless steel screens are filled between the plates.
Further, the ratio of the eccentricity of the air inlet pipe to the radius of the cylinder is 0.5-0.6.
Further, one end of the liquid inlet pipe extending into the cylinder body is bent to the inner wall of the cylinder body.
The adoption of the further scheme has the beneficial effects that the gas-liquid two-phase refrigerant entering from the liquid inlet pipe is prevented from directly impacting the liquid level, and the liquid drops are ensured to flow down along the inner wall.
Further, the mesh number of the fine wire mesh demister is smaller than 200 meshes, and the mesh number of the coarse wire mesh demister is smaller than 100 meshes.
The adoption of the further scheme has the beneficial effects that the filtering effect of removing mist carried in the gas-phase refrigerant is best under the filtering precision, and the transmittance of the gas-phase refrigerant can be ensured.
Further, an anti-vortex plate is further arranged in the lower cylinder body, and the anti-vortex plate is arranged at a position where the liquid outlet pipe stretches into the cylinder body.
The beneficial effect of adopting above-mentioned further scheme is, prevent vortex board is used for preventing refrigerant delivery pump from taking impurity or lubricating oil away from in the barrel.
Further, a drain pipe and an oil drain pipe are arranged on the lower seal head, the drain pipe is located at the lowest point of the lower seal head and used for removing impurities, and the oil drain pipe is higher than the drain pipe.
The oil drain pipe has the beneficial effects that the oil drain pipe is matched with the sewage drain pipe for use, so that the oil storage at the bottom of the cylinder body is convenient to collect.
Further, a liquid level collecting pipe communicated with the inner cavity of the cylinder body is arranged on the cylinder body, a liquid level transmitter and a liquid level meter are arranged on the liquid level collecting pipe, the liquid level transmitter is used for controlling the liquid level height, and the liquid level meter is used for displaying the liquid level height in real time.
The liquid level transmitter and the liquid level meter control the liquid level of the stored liquid together, so that the liquid level does not exceed the limit height, the suction liquid is prevented from being carried by too high liquid level, the liquid level is prevented from being too low, and the liquid outlet shielding pump is prevented from being pumped out and cavitation is prevented.
The utility model provides a vertical barrel pump refrigerating system, includes compressor, condenser, reservoir, evaporimeter and refrigerant delivery pump, still includes vertical low pressure circulation bucket, the outlet duct of vertical low pressure circulation bucket with the sunction inlet intercommunication of compressor, the discharge port of compressor the condenser with the inlet of reservoir is series connection intercommunication in proper order, the pipeline outside the liquid outlet of reservoir divide into first branch road and second branch road, first branch road with the feed liquor pipe intercommunication of vertical low pressure circulation bucket, coil pipe in the vertical low pressure circulation bucket includes coil pipe inlet and coil pipe liquid outlet, the second branch road with coil pipe inlet intercommunication, the coil pipe liquid outlet pass through the return liquor pipe with first branch road intercommunication, the drain pipe of vertical low pressure circulation bucket the refrigerant delivery pump the evaporimeter is connected with the intake pipe of vertical low pressure circulation bucket is series connection in proper order and is linked together.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
the vertical barrel pump refrigerating system adopts the vertical low-pressure circulating barrel, and the barrel adopts the cyclone separation original technology, so that the barrel pump refrigerating system is more suitable for the barrel pump refrigerating system, and the liquid ratio in common return air is higher because the barrel pump refrigerating system has larger circulation multiplying power, and large liquid drops are easier to separate when cyclone separation is adopted; because the upper cylinder body and the lower cylinder body of the cylinder body are integrally designed up and down, the liquid storage space volume of the lower cylinder body is smaller than that of a conventional vertical or horizontal low-pressure circulating barrel, but the liquid storage height is high, and the cavitation allowance height of a shielding pump can be met.
Further, a liquid supply regulating valve group is also arranged on the liquid inlet pipe of the vertical low-pressure circulating barrel.
The adoption of the further scheme has the beneficial effects that the flow rate of the liquid entering the vertical low-pressure circulation barrel can be accurately controlled through the throttling function of the liquid supply regulating valve group, and the utilization rate and the treatment efficiency of the liquid are improved; meanwhile, the liquid supply adjusting valve group can be flexibly adjusted according to actual requirements so as to meet different process requirements.
Further, the first branch and/or the second branch are/is provided with flow regulating valves.
The flow regulating valve can be used for precisely controlling the flow distribution of the refrigerant on the first branch and/or the second branch so as to meet different process requirements; by adjusting the flow regulating valve, the refrigerant can be uniformly distributed or distributed according to a specific proportion, so that the stability and the reliability of the system are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only embodiments of the present invention, and other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the structure of a vertical low pressure circulation tank of the present invention;
FIG. 2 is a schematic view of the cross-sectional structure of the A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic view of the B-B cross-sectional structure of FIG. 1 according to the present invention;
FIG. 4 is a schematic view of the cross-sectional C-C structure of FIG. 1 in accordance with the present invention;
FIG. 5 is a schematic diagram of a vertical barrel pump refrigeration system according to the present invention;
in the figure, 1, a flange; 2. fine screen foam remover; 3. a cylinder; 4. a separation cylinder; 5. a porous plate; 51. a central bore; 52. a through hole; 6. a liquid inlet pipe; 7. a lower end enclosure; 8. an oil drain pipe; 9. a blow-down pipe; 10. a liquid outlet pipe; 11. a liquid level gauge; 12. a liquid level transmitter; 13. an air inlet pipe; 14. an air outlet pipe; 15. a coiled pipe; 151. a liquid inlet of the coil pipe; 152. a coil pipe liquid outlet; 16. a coarse screen demister; 17. an anti-vortex plate; 18. a compressor; 19. a condenser; 20. a reservoir; 21. an evaporator; 22. a refrigerant delivery pump; 23. a first branch; 24. a second branch; 25. a liquid supply regulating valve group; 26. a first flow regulating valve; 27. a second flow regulating valve; 28. a liquid return pipe; 29. and a baffle.
Detailed Description
The principles and features of the present invention are described below in connection with examples, which are set forth only to illustrate the present invention and not to limit the scope of the invention.
As shown in fig. 1-4, the vertical low-pressure circulation barrel comprises a barrel body 3, wherein a flange 1 is arranged above the barrel body 3, a lower seal head 7 is arranged below the barrel body 3, the flange 1 and the lower seal head 7 are connected together to form a sealed cavity, an air inlet pipe 13, an air outlet pipe 14, a liquid inlet pipe 6 and a liquid outlet pipe 10 are also arranged on the barrel body 3, and the air inlet pipe 13 is eccentrically arranged at the upper part of the barrel body 3; a porous plate 5 is arranged in the cylinder 3, the porous plate 5 plays a role in impact separation, and the porous plate 5 divides the cylinder 3 into an upper cylinder and a lower cylinder; be equipped with separating tube 4, smart silk screen foam remover 2 and coarse silk screen foam remover 16 in the last barrel, smart silk screen foam remover 2 is cylindric, outlet duct 14 below is equipped with baffle 29, baffle 29 installs the bottom of smart silk screen foam remover 2, separating tube 4 cover is established outside smart silk screen foam remover 2, separating tube 4 with set up coil 15 between the smart silk screen foam remover 2, separating tube 4 with form whirlwind separation space between the inner wall of barrel 3, coarse silk screen foam remover 16 is installed the bottom of separating tube 4, be the gravity separation space between smart silk screen foam remover 2 and the coarse silk screen foam remover 16.
The perforated plate 5 has a central hole 51, the diameter D2 of the central hole 51 is smaller than the outer diameter D1 of the coarse wire mist eliminator 16, and a plurality of through holes 52 are provided divergently outward around the central hole 51. The diameter of the through hole 52 gradually increases from the center to the outer edge, and the diameter of the through hole 52 which is closer to the cylinder wall is larger, so that not only can the air flow not blow the liquid level directly, but also the liquid drop can be ensured to smoothly flow down along the cylinder wall and not accumulate.
In this embodiment, the vertical distance d3 between the porous plate 5 and the separation cylinder 4 is 50mm to 100mm, the space between the porous plate 5 and the separation cylinder 4 is too large, so that the impact separation effect is not achieved, the drops are not easy to fall, and the space is too small, so that larger resistance is easily caused, and by adopting the arrangement, the porous plate 5 can more effectively exert the impact separation effect, so that the drops fall smoothly. Meanwhile, the excessive resistance is avoided in the distance range, and the normal operation of the system is ensured.
The coarse silk screen foam remover 16 adopts a double-layer porous plate 5, stainless steel wire nets are filled between the plates, and the mesh number of the coarse silk screen foam remover 16 is smaller than 100 meshes, namely the mesh number of the stainless steel wire nets in the coarse silk screen foam remover 16 is smaller than 100 meshes. The stainless steel wire mesh is also filled in the plate of the fine wire mesh demister 2, and the mesh number of the fine wire mesh demister 2 is smaller than 200 meshes, namely the mesh number of the stainless steel wire mesh in the fine wire mesh demister 2 is smaller than 200 meshes. Under the filtering precision, the filtering effect of removing mist carried in the gas-phase refrigerant is best, and the transmittance of the gas-phase refrigerant can be ensured.
In the embodiment of the present invention, the ratio of the eccentricity d1 of the air inlet pipe 13 to the radius of the cylinder 3 is in the range of 0.5-0.6.
One end of the liquid inlet pipe 6 extending into the cylinder body 3 is bent towards the inner wall of the cylinder body 3. The distance d2 between the end of the liquid inlet pipe 6 extending into the cylinder body 3 and the inner wall of the cylinder body 3 is 30-50 mm. The arrangement can prevent the gas-liquid two-phase refrigerant entering from the liquid inlet pipe 6 from directly impacting the liquid level, and ensures that liquid drops flow down along the inner wall.
The lower cylinder is also internally provided with an anti-vortex plate 17, the anti-vortex plate 17 is arranged at a position where the liquid outlet pipe 10 stretches into the cylinder 3, and the anti-vortex plate 17 is used for preventing the refrigerant conveying pump 22 from pumping impurities or lubricating oil out of the cylinder 3.
The lower seal head 7 is provided with a drain pipe 9 and an oil drain pipe 8, the drain pipe 9 is positioned at the lowest point of the lower seal head 7 and used for removing impurities, the oil drain pipe 8 is higher than the drain pipe 9, and the oil drain pipe 8 is matched with the drain pipe 9 for use, so that the oil storage at the bottom of the cylinder body 3 is convenient to collect.
The liquid level collecting pipe communicated with the inner cavity of the cylinder body 3 is arranged on the cylinder body 3, a liquid level transmitter 12 and a liquid level meter 11 are arranged on the liquid level collecting pipe, the liquid level transmitter 12 is used for controlling the liquid level height, and the liquid level meter 11 is used for displaying the liquid level height in real time. The liquid level transmitter 12 and the liquid level meter 11 jointly control the liquid level of the stored liquid, so that the stored liquid does not exceed the limit height, the suction liquid is prevented from being carried by too high liquid level, the liquid level is prevented from being too low, and the liquid outlet shielding pump is prevented from being pumped out and cavitation is prevented.
As shown in fig. 5, a refrigeration system of a vertical barrel pump comprises a compressor 18, a condenser 19, a liquid storage device 20, an evaporator 21 and a refrigerant delivery pump 22, and further comprises a vertical low-pressure circulation barrel, an air outlet pipe 14 of the vertical low-pressure circulation barrel is communicated with a suction inlet of the compressor 18, a discharge outlet of the compressor 18, the liquid storage device 19 and a liquid inlet of the liquid storage device 20 are sequentially connected in series, a pipeline outside a liquid outlet of the liquid storage device 20 is divided into a first branch 23 and a second branch 24, the first branch 23 is communicated with a liquid inlet pipe 6 of the vertical low-pressure circulation barrel, a coil 15 of the vertical low-pressure circulation barrel comprises a coil liquid inlet 151 and a coil liquid outlet 152, the second branch 24 is communicated with the coil liquid inlet 151, the coil liquid outlet 152 is communicated with the first branch 23 through a liquid return pipe 28, and a liquid outlet pipe 10 of the vertical low-pressure circulation barrel, the refrigerant delivery pump 22, the evaporator 21 are sequentially connected with the liquid inlet pipe 6 of the vertical low-pressure circulation barrel in series.
The liquid inlet pipe 6 of the vertical low-pressure circulation barrel is also provided with a liquid supply regulating valve group 25.
The first branch 23 and the second branch 24 are respectively provided with a first flow regulating valve 26 and a second flow regulating valve 27.
The working principle of the vertical low-pressure circulation barrel is as follows:
The air inlet pipe 13 of the vertical low-pressure circulation barrel is connected with the air return pipe of the evaporator 21, the air outlet pipe 14 is connected with the air suction pipe of the compressor 18, and the gas-liquid two-phase refrigerant from the air return pipe of the evaporator 21 enters the cyclone separation space outside the separation barrel 4 from the air inlet pipe 13 of the cyclone separator and flows in a rotating way under the action of centrifugal force. Due to the spacing effect of the separating cylinders 4, the air flow flows downwards while rotating, and the liquid drops with larger diameters are thrown down onto the inner wall of the cylinder 3 due to the centrifugal force effect and then flow into the liquid storage at the bottom of the cylinder 3 along the inner wall of the cylinder 3. And a part of liquid drops impact the liquid surface at the bottom of the cylinder body 3 in the process of downward flowing of the air flow, and then the gas-liquid two-phase refrigerant sequentially passes through impact separation of the porous plate 5 and first mechanical filtering separation of the coarse wire mesh foam remover 16 from the lower liquid storage space upwards and then continuously flows into the gravity separation space upwards. In the gravity separation space, gravity separation is carried out once due to gravity and speed reduction, the separated liquid drops fall into the bottom of the cylinder 3, airflow continues to rise, as indicated by an arrow in fig. 1, the airflow hits a baffle 29 below the air outlet pipe 14 and turns, the airflow is subjected to secondary mechanical filtering separation through the cylindrical fine wire mesh demister 2, part of refrigerant mist carried by the gas-phase refrigerant is separated, the gas-phase refrigerant enters the air outlet pipe 14 and is pumped by the compressor 18, and most of mist is settled to the bottom of the cylinder 3 under the action of gravity after the filtering impact action of the fine wire mesh demister 2.
In addition, be provided with coil pipe 15 between separating section of thick bamboo 4 and smart silk screen demister 2, with the refrigerant condensate liquid of high temperature high pressure access coil pipe 15 in the operation in-process, can realize the supercooling of refrigerant liquid, will get into the micro-droplet heating evaporation that contains in the gas of second mechanical filtration simultaneously, further promote gaseous separation efficiency.
Compared with the prior art, the invention can effectively separate the gas-liquid two-phase refrigerant entering the vertical low-pressure circulation barrel, remove liquid drops and mist, prevent the liquid from being carried by the air suction of the compressor 18, cause the liquid impact accident of the compressor 18 and improve the safety. Compared with the existing common vertical low-pressure liquid storage device and horizontal low-pressure circulating barrel, the device has great advantages in separation efficiency and occupied space, can obviously simplify system design and civil engineering difficulty, and reduces initial investment requirements. In addition, with existing ammonia refrigeration systems, the filling amount of ammonia is limited by the country according to the requirements of significant hazard source identification. In order to ensure safe operation of the system, the storage type container should minimize the storage amount of ammonia on the premise of meeting the operation conditions. However, the vertical low-pressure liquid reservoir and the horizontal low-pressure circulating barrel which are common at present have thick barrel diameters and long lengths under the condition of meeting the requirement of separation performance, so that the storage capacity is far beyond that of the invention. In most cases, excess ammonia storage is an unnecessary over-design. Therefore, the design of the patent has the functions of reducing the filling amount and improving the safety of the system in an intangible way.
The working principle of the vertical barrel pump refrigerating system of the invention is as follows:
The high-temperature high-pressure refrigerant condensed liquid is divided into two paths of liquid supply from the liquid storage 20, one path is communicated with the liquid inlet pipe 6 of the vertical low-pressure circulation barrel through the first branch 23, the other path is communicated with the coil pipe 15 through the second branch 24, the refrigerant liquid flowing into the coil pipe 15 is generally at condensation temperature, liquid drops which are not separated completely in the vertical low-pressure circulation barrel are saturated liquid at evaporation temperature, the two paths form the effect of heat exchange of the coil pipe 15, the heat emitted by the liquid drop absorption coil pipe 15 is evaporated, and the phase change latent heat of the liquid drop evaporation needs to absorb the heat of the condensed liquid, so that the liquid is supercooled and the temperature is reduced. The supercooled liquid is connected to the front of the liquid supply regulating valve group 25 of the vertical low-pressure circulation barrel from the coil liquid outlet 152, and then enters the vertical low-pressure circulation barrel from the liquid inlet pipe 6 of the vertical low-pressure circulation barrel. The flow distribution of the refrigerant between the first branch 23 and the second branch 24 is regulated by a first flow regulating valve 26 and a second flow regulating valve 27 to ensure that the requirements of the terminal liquid supply amount can be satisfied at the same time.
The high-pressure liquid is throttled by the liquid supply regulating valve group 25, and then the refrigerant which becomes gas-liquid two phases enters the vertical low-pressure circulation barrel. The gas is mixed with the gas in the gas-liquid two-phase refrigerant returned by the evaporator 21, the gas is separated, filtered, regenerated and the like to form saturated gas, the saturated gas passes through the gas outlet of the vertical low-pressure circulating barrel, is pumped and compressed by the compressor 18 to form high-pressure high-temperature gas, and then is condensed into liquid by the condenser 19, and the liquid flows into the liquid storage device 20 to be stored and circulated next time; the liquid is mixed with the liquid in the gas-liquid two-phase refrigerant returned by the evaporator 21, falls into the liquid storage space of the vertical low-pressure circulation barrel in a separation, filtration and other modes, is pumped away and pressurized by the refrigerant circulation pump, is supplied to the evaporator 21 to absorb the heat of the frozen goods for evaporation, and is circulated in multiple times, so that the refrigerant fluid forming the gas-liquid two-phase returns to the vertical low-pressure circulation barrel and then is circulated next time.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (12)
1. The vertical low-pressure circulation barrel comprises a barrel body (3), wherein a flange (1) is arranged above the barrel body (3), a lower seal head (7) is arranged below the barrel body (3), the flange (1) and the lower seal head (7) are connected together to form a sealed cavity, an air inlet pipe (13), an air outlet pipe (14), a liquid inlet pipe (6) and a liquid outlet pipe (10) are further arranged on the barrel body (3),
The air inlet pipe (13) is eccentrically arranged at the upper part of the cylinder body (3); a porous plate (5) is arranged in the cylinder (3), the porous plate (5) plays a role in impact separation, and the porous plate (5) divides the cylinder (3) into an upper cylinder and a lower cylinder; the separator is characterized in that a separation cylinder (4), a fine wire mesh foam remover (2) and a coarse wire mesh foam remover (16) are arranged in the upper cylinder, the fine wire mesh foam remover (2) is cylindrical, a baffle (29) is arranged at the bottom end of the fine wire mesh foam remover (2), the separation cylinder (4) is sleeved outside the fine wire mesh foam remover (2), a coil pipe (15) is arranged between the separation cylinder (4) and the fine wire mesh foam remover (2), high-temperature and high-pressure refrigerant condensed liquid is connected into the coil pipe (15) in the operation process, supercooling of the refrigerant liquid can be realized, micro liquid drops contained in gas to be filtered in the fine wire mesh foam remover (2) are heated and evaporated, a cyclone separation space is formed between the separation cylinder (4) and the inner wall of the cylinder (3), and the coarse wire mesh foam remover (16) is arranged at the bottom of the separation cylinder (4), and a gravity separation space is formed between the fine wire mesh foam remover (2) and the coarse wire mesh foam remover (16);
the porous plate (5) is provided with a central hole (51), the diameter of the central hole (51) is smaller than the outer diameter of the coarse silk screen foam remover (16), and a plurality of through holes (52) are arranged around the central hole (51) in a divergent mode;
The diameter of the through hole (52) is gradually increased from the center to the outer edge, and the diameter of the through hole (52) which is closer to the cylinder wall is larger, so that not only can the air flow not blow the liquid level directly, but also the liquid drops can be ensured to smoothly flow down along the cylinder wall and not be accumulated.
2. The vertical low pressure circulation tank according to claim 1, characterized in that the vertical distance between the perforated plate (5) and the separation cylinder (4) is 50-100 mm.
3. The vertical low-pressure circulation tank according to claim 1 or 2, characterized in that the coarse wire mesh demister (16) adopts a double-layer porous plate (5), and stainless wire meshes are filled between the plates.
4. A vertical low pressure circulation tank according to claim 3, characterized in that the ratio of the eccentricity of the inlet pipe (13) to the radius of the cylinder (3) is 0.5-0.6.
5. The vertical low-pressure circulation tank according to claim 4, wherein one end of the liquid inlet pipe (6) extending into the tank body (3) is bent toward the inner wall of the tank body (3).
6. The vertical low pressure circulation tank according to claim 1, characterized in that the mesh number of the fine wire mesh demister (2) is less than 200 mesh and the mesh number of the coarse wire mesh demister (16) is less than 100 mesh.
7. The vertical low-pressure circulation barrel according to claim 1, wherein an anti-vortex plate (17) is further arranged in the lower barrel body, and the anti-vortex plate (17) is arranged at a position where the liquid outlet pipe (10) stretches into the barrel body (3).
8. The vertical low-pressure circulation tank according to claim 1, wherein a drain pipe (9) and an oil drain pipe (8) are arranged on the lower seal head (7), the drain pipe (9) is located at the lowest point of the lower seal head (7) and is used for removing impurities, and the oil drain pipe (8) is higher than the drain pipe (9).
9. The vertical low-pressure circulation barrel according to claim 1, wherein a liquid level header communicated with the inner cavity of the barrel (3) is arranged on the barrel (3), a liquid level transmitter (12) and a liquid level meter (11) are arranged on the liquid level header, the liquid level transmitter (12) is used for controlling the liquid level height, and the liquid level meter (11) is used for displaying the liquid level height in real time.
10. The utility model provides a vertical barreled pump refrigerating system, includes compressor (18), condenser (19), reservoir (20), evaporimeter (21) and refrigerant delivery pump (22), its characterized in that still includes vertical low pressure circulation bucket according to any one of claims 1 ~ 8, outlet duct (14) of vertical low pressure circulation bucket with the sunction inlet intercommunication of compressor (18), the discharge port of compressor (18) condenser (19) with the inlet of reservoir (20) is series connection intercommunication in proper order, the pipeline outside the liquid outlet of reservoir (20) divide into first branch road (23) and second branch road (24), first branch road (23) with the feed liquor pipe (6) intercommunication of vertical low pressure circulation bucket, coil pipe (15) in the vertical low pressure circulation bucket include coil pipe inlet (151) and coil pipe liquid outlet (152), second branch road (24) with coil pipe inlet (151) intercommunication, coil pipe liquid outlet (152) pass through return liquor pipe (28) with first branch road (23) and vertical low pressure circulation bucket (13), feed liquor inlet (24) and vertical low pressure circulation bucket (13) are in proper order linked together.
11. The vertical barrel pump refrigeration system according to claim 10, wherein the liquid inlet pipe (6) of the vertical low-pressure circulation barrel is further provided with a liquid supply regulating valve group (25).
12. A vertical barrel pump refrigeration system according to claim 11, wherein flow regulating valves are provided on the first branch (23) and/or the second branch (24).
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| CN202410156106.4A CN117685698B (en) | 2024-02-04 | 2024-02-04 | Vertical low-pressure circulation barrel and vertical barrel pump refrigerating system |
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| CN202410156106.4A CN117685698B (en) | 2024-02-04 | 2024-02-04 | Vertical low-pressure circulation barrel and vertical barrel pump refrigerating system |
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| CN117685698B true CN117685698B (en) | 2024-04-30 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2319730A1 (en) * | 1972-04-19 | 1973-10-31 | Holima Bv James H | OIL SEPARATOR |
| US4054424A (en) * | 1974-06-17 | 1977-10-18 | Shell Internationale Research Maatschappij B.V. | Process for quenching product gas of slagging coal gasifier |
| CN102853591A (en) * | 2012-09-03 | 2013-01-02 | 梁嘉麟 | Structural form of small-volume low-pressure circulating barrel structure in application of liquid pump in high-rise refrigeration air conditioner system set |
| CN105258373A (en) * | 2015-10-29 | 2016-01-20 | 松下压缩机(大连)有限公司 | Ejecting oil return refrigerating system with oil liquid separator |
| CN111023607A (en) * | 2019-12-27 | 2020-04-17 | 薛辉 | Cold energy generation equipment and cryogenic system |
| WO2021132857A1 (en) * | 2019-12-23 | 2021-07-01 | 김헌목 | Low-temperature oil-feed-type air compressor system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06281298A (en) * | 1993-03-30 | 1994-10-07 | Kubota Corp | Refrigerant separator |
-
2024
- 2024-02-04 CN CN202410156106.4A patent/CN117685698B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2319730A1 (en) * | 1972-04-19 | 1973-10-31 | Holima Bv James H | OIL SEPARATOR |
| US4054424A (en) * | 1974-06-17 | 1977-10-18 | Shell Internationale Research Maatschappij B.V. | Process for quenching product gas of slagging coal gasifier |
| CN102853591A (en) * | 2012-09-03 | 2013-01-02 | 梁嘉麟 | Structural form of small-volume low-pressure circulating barrel structure in application of liquid pump in high-rise refrigeration air conditioner system set |
| CN105258373A (en) * | 2015-10-29 | 2016-01-20 | 松下压缩机(大连)有限公司 | Ejecting oil return refrigerating system with oil liquid separator |
| WO2021132857A1 (en) * | 2019-12-23 | 2021-07-01 | 김헌목 | Low-temperature oil-feed-type air compressor system |
| CN111023607A (en) * | 2019-12-27 | 2020-04-17 | 薛辉 | Cold energy generation equipment and cryogenic system |
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| CN117685698A (en) | 2024-03-12 |
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