CN213514554U - Refrigeration house utilizing liquid oxygen cold energy for refrigeration - Google Patents
Refrigeration house utilizing liquid oxygen cold energy for refrigeration Download PDFInfo
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- CN213514554U CN213514554U CN202022272512.7U CN202022272512U CN213514554U CN 213514554 U CN213514554 U CN 213514554U CN 202022272512 U CN202022272512 U CN 202022272512U CN 213514554 U CN213514554 U CN 213514554U
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Abstract
The utility model relates to an utilize cryogenic freezer of liquid oxygen cold volume, including cold-storage coil pipe heat exchanger, fan, storehouse, interlocking control system, cold-storage coil pipe heat exchanger includes coil pipe and cold-storage container, and inside is equipped with the level gauge. The fan is connected with one end of the coil pipe, the storehouse is connected with the other end of the coil pipe and provided with an air inlet valve, and a thermometer is arranged in the storehouse. The outlet end of the coil is also communicated with the atmosphere through an emptying valve. The interlock control system is electrically connected with the liquid level meter, the fan, the thermometer, the air inlet valve and the emptying valve. The cold storage type coil heat exchanger is arranged, so that the cold energy of liquid oxygen is utilized to refrigerate the storehouse, energy is saved, and the cold storage type coil heat exchanger is green and environment-friendly; by arranging the air release valve and the pipeline where the air release valve is arranged, the liquid oxygen can be kept vaporized when refrigeration is not needed, and the liquid level is prevented from being too high; by arranging the interlocking control system, the refrigerating of the storehouse and the vaporization of the liquid oxygen can be ensured to be simultaneously and normally operated under different states.
Description
Technical Field
The utility model relates to a refrigeration technology field, more specifically relates to an utilize cryogenic freezer of liquid oxygen cold volume.
Background
In the air separation technique, since hydrocarbons that cannot be removed from the raw material may accumulate in the rectifying column, it is necessary to periodically extract liquid oxygen from the main cooling portion of the rectifying column to avoid explosion due to accumulation of hydrocarbons such as acetylene. The liquid oxygen has low temperature, and the direct discharge can cause the waste of cold energy, so that the cold energy needs to be recycled.
In the prior art, the refrigeration house which utilizes the cooling capacity of liquid oxygen is easy to cause excessive cooling because the temperature of the liquid oxygen is too low; the refrigeration house for refrigerating by taking liquid oxygen from the air separation rectifying tower has the problems that the temperature of the refrigeration house is increased due to too small amount of liquid oxygen in the interval time, the refrigeration house cannot refrigerate and the like because the liquid oxygen is periodically extracted.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides an utilize cryogenic freezer of liquid oxygen cold volume, including cold-storage coil heat exchanger 1, fan 2, storehouse 3, interlock control system 4, cold-storage coil heat exchanger 1 includes coil pipe 11 and cold-storage container 12. The upper part of the side wall of the cold accumulation container 12 is provided with a liquid oxygen inlet, the top wall is provided with an oxygen discharge port, and the inside is provided with a liquid level meter L1. The coil pipe 11 is arranged inside the cold accumulation container 12, the coil pipe 11 comprises an inlet end and an outlet end, and two ends of the coil pipe respectively penetrate through the side wall of the cold accumulation container 12 to extend out. The fan 2 is connected to the inlet end of the coil 11 and is used for inputting air into the coil 11. Storehouse 3 is connected the exit end of coil pipe 11, and the junction is equipped with admission valve V2, be equipped with thermometer T1 in the storehouse 3. The outlet end of the coil pipe 11 is also communicated with the atmosphere, and a vent valve V1 is arranged at the joint. And the interlocking control system 4 is electrically connected with the liquid level meter L1 and the fan and is used for controlling the liquid level of the cold storage coil heat exchanger 1. The interlock control system 4 is also electrically connected to the thermometer T1, the intake valve V2, and the emptying valve V1 for controlling the temperature of the storehouse 3.
According to the utility model discloses an embodiment, freezer, still include the gas distributor, the gas distributor is connected the exit end of coil pipe 11 sets up in the storehouse 3.
According to an embodiment of the utility model, freezer still include alarm device, the electricity is connected level gauge L1 and thermometer T1.
According to the utility model discloses an embodiment, fan 2 is connected storehouse 3 for the circulation is to the interior air cooling of storehouse 3.
According to the utility model discloses an embodiment, freezer still include liquid oxygen vaporizer 5, cold-storage container 12 diapire still opens the urgent discharge port of connecting liquid oxygen vaporizer 5, urgent discharge port department is equipped with urgent bleeder valve V3. The outlet end of the coil 11 is connected to the atmosphere via the liquid oxygen vaporizer 5.
According to one embodiment of the present invention, the coil 11 includes a primary coil 111 and a secondary coil 112, and the cold storage container 12 includes a primary cold storage container 121 and a secondary cold storage container 122. The primary coil 111 is arranged in the primary cold storage container 121, and the secondary coil 112 is arranged in the secondary cold storage container 122. The entry end of one-level coil pipe 111 is equipped with fan 2, the exit end of one-level coil pipe 111 is connected the entry end of second grade coil pipe 112, the exit end intercommunication of second grade coil pipe 112 storehouse 3 and atmosphere. The bottom of the primary cold accumulation container 121 is connected with the top of the secondary cold accumulation container 122, the upper part of the side wall of the secondary cold accumulation container 122 is provided with a liquid oxygen inlet, the inside of the secondary cold accumulation container is provided with a liquid level meter L1, and the top wall of the primary cold accumulation container 121 is provided with an oxygen discharge port.
According to an embodiment of the present invention, the ratio of the volumes of the primary cold storage container 121 and the secondary cold storage container 122 is greater than 10: 1.
According to an embodiment of the present invention, the ratio of the lengths of the primary coil 111 and the secondary coil 112 is greater than 10: 1.
According to the utility model discloses an embodiment, the pressure release mouth has still been opened to one-level cold-storage container 121 roof, the pressure release mouth is equipped with the relief valve, is used for reducing one-level cold-storage container 121 internal gas pressure.
By arranging the interlocking control system, the utility model can ensure that the storehouse refrigeration and the liquid oxygen vaporization can be simultaneously and normally operated under different states; by arranging the liquid oxygen vaporizer, liquid oxygen can be rapidly discharged under special conditions, and the safety of the refrigeration house is improved; by arranging the two-stage coil pipe and the two-stage cold accumulation container, the vaporized low-temperature oxygen is recycled after the cold energy of the liquid oxygen is utilized, the energy is saved, and the environment is protected
Drawings
FIG. 1 is a schematic view of a refrigerator for cooling by liquid oxygen cooling;
FIG. 2 is a schematic view of a refrigerated storage including a liquid oxygen vaporizer;
fig. 3 is a schematic view of a cold store including a two-stage coil and a two-stage cold storage container.
Detailed Description
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like elements and techniques of the present invention so that advantages and features of the present invention may be more readily understood when implemented in a suitable environment. The following description is an embodiment of the present invention, and other embodiments related to the claims that are not explicitly described also fall within the scope of the claims.
Fig. 1 is a schematic view of a refrigerator for cooling by liquid oxygen refrigeration.
As shown in fig. 1, a refrigeration house using liquid oxygen refrigeration capacity includes a cold storage type coil heat exchanger 1, a fan 2, a storage house 3, and an interlock control system 4. The cold-storage coil heat exchanger 1 includes a coil 11 and a cold-storage container 12. The upper part of the side wall of the cold accumulation container 12 is provided with a liquid oxygen inlet, and the top wall is provided with an oxygen discharge port. The coil pipe 11 is made of low-temperature resistant material, is arranged inside the cold accumulation container 12 and comprises an inlet end and an outlet end, two ends of the coil pipe respectively penetrate through the side wall of the cold accumulation container 12 and extend out, and a liquid level meter L1 is arranged in the cold accumulation container 12. The fan 2 is connected to the inlet end of the coil 11 and is used for inputting air into the coil 11. Storehouse 3 is connected the exit end of coil pipe 11, and the junction is equipped with admission valve V2, be equipped with thermometer T1 in the storehouse 3. The outlet end of the coil pipe 11 is also communicated with the atmosphere, and a vent valve V1 is arranged at the joint. And the interlocking control system 4 is electrically connected with the liquid level meter L1 and the fan and is used for controlling the liquid level of the cold storage coil heat exchanger 1. The interlock control system 4 is also electrically connected to the thermometer T1, the intake valve V2, and the emptying valve V1 for controlling the temperature of the storehouse 3. The liquid oxygen is liquid oxygen with the mass fraction of more than 90 percent.
The cold storage type coil heat exchanger 1 can be used for cold storage, and comprises a coil 11 and a cold storage container 12, and is used for exchanging heat of media inside and outside the coil, namely exchanging heat of media of a shell side and a tube side. Meanwhile, the cold storage container 12 also has the function of storing liquid oxygen, namely cold storage, and the outer wall is provided with cold insulation materials. The liquid oxygen inlet and the oxygen discharge port of the cold accumulation container 12 can be provided with valves for convenient control, and the oxygen discharge port can also be provided with a one-way valve and a flame arrester. When the freezer normally works, the liquid oxygen liquid level can guarantee that coil pipe 11 and liquid oxygen contact and heat transfer. The cold accumulation container 12 is internally provided with a liquid level meter L1 for detecting the liquid oxygen level in the cold accumulation container 12 and preventing the liquid level from being too low to cause refrigeration or the liquid level from being too high to cause accident danger under the combined action of the liquid level meter and the interlocking control system 4.
Fan 2 is connected the entry end of coil pipe 11, storehouse 3 is connected the exit end of coil pipe 11, fan 2 carries the air to refrigerate in the coil pipe 11, then gets into storehouse 3 promptly. A thermometer T1 is arranged in the storehouse 3 and is used for detecting the temperature in the storehouse 3 and the interlocking control system 4 is used for preventing the over-cooling caused by the over-low temperature or the damage of the articles in the storehouse 3 caused by the over-high temperature.
The interlocking control system 4, namely an interlocking instrument control system, can be linked with an air separation system, and the interlocking control system 4 is arranged in a control room of the air separation system. The interlock control system 4 is electrically connected with the liquid level meter L1, the thermometer T1, the air inlet valve V2 and the emptying valve V1, and is internally provided with a preset temperature state and a preset liquid level state for normal operation and actions corresponding to different states. When the temperature is high and the liquid level is high, the fan 2 is started, the air inlet valve V2 is opened, the emptying valve V1 is closed, the fan 2 conveys air to the coil pipe 11 for refrigeration, then the air enters the storehouse 3, and the liquid oxygen is gasified to reduce the liquid level and cool the storehouse 3 at the same time. When the temperature is low and the liquid level is high, the fan 2 is started, the air inlet valve V2 is closed, the emptying valve V1 is opened, the fan 2 conveys air to the coil pipe 11 for refrigeration, then the air is exhausted to the atmosphere, and the refrigeration of the storehouse 3 is stopped while the liquid level is reduced by gasifying the liquid oxygen. When the liquid level is low and the temperature is low, the fan 2 is turned off, the air inlet valve V2 is closed, the emptying valve V1 is opened, the gasification of the liquid oxygen is stopped, and the refrigeration of the storehouse 3 is stopped. When the liquid level is low and the temperature is high, the instrument gives an alarm and actively supplements liquid oxygen, the liquid oxygen is actively added to improve the liquid level, and then the fan 2 is started to refrigerate the storehouse 3 when the liquid level is high.
The cold accumulation type coil heat exchanger is arranged, so that a compressor with high power consumption is not needed for refrigeration, and the cold energy of liquid oxygen is utilized for refrigerating the storehouse, thereby saving energy and being green and environment-friendly; by arranging the air release valve and the pipeline where the air release valve is arranged, the liquid oxygen can be kept vaporized when refrigeration is not needed, and the liquid level is prevented from being too high; by arranging the interlocking control system, the refrigerating of the storehouse and the vaporization of the liquid oxygen can be ensured to be simultaneously and normally operated under different states.
According to the utility model discloses an embodiment, freezer still include gas distributor, gas distributor connects the exit end of coil pipe 11 sets up in the storehouse 3. The gas distributor helps the low-temperature gas to refrigerate the storehouse 3 better, and prevents the temperature of the storehouse 3 from being uneven.
According to an embodiment of the utility model, freezer still include alarm device, the electricity is connected level gauge L1 and thermometer T1. The alarm device reminds people to operate the interlocking control system 4 in time to reduce the loss caused by abnormal states.
According to the utility model discloses an embodiment, fan 2 is connected storehouse 3 for the air cooling in the circulation storehouse 3. The air in the storehouse 3 is circularly refrigerated, so that the cold energy resource is effectively saved, and the environment is protected.
Fig. 2 is a schematic view of a refrigerator including a liquid oxygen vaporizer.
As shown in fig. 2, the cold storage may further include a liquid oxygen vaporizer 5, the bottom wall of the cold storage container 12 is further opened with an emergency discharge port connected to the liquid oxygen vaporizer 5, and the emergency discharge port is provided with an emergency discharge valve V3. The outlet end of the coil 11 is connected to the atmosphere via the liquid oxygen vaporizer 5. When the liquid oxygen needs to be discharged quickly in an emergency, the fan 2 is started, the emergency discharge valve V3 and the emptying valve V1 are opened, the liquid oxygen enters the liquid oxygen vaporizer 5 through the emergency discharge port, the fan 2 conveys air into the liquid oxygen vaporizer 5 through the emptying valve V1, and the low-pressure air vaporizes the liquid oxygen quickly, so that the liquid level in the cold accumulation container 12 can be lowered as soon as possible, and the safety of the refrigeration house is improved.
Fig. 3 is a schematic view of a cold store including a two-stage coil and a two-stage cold storage container.
As shown in fig. 3, the coil 11 may include a primary coil 111 and a secondary coil 112, and the cold storage container 12 may include a primary cold storage container 121 and a secondary cold storage container 122. The primary coil 111 is arranged in the primary cold storage container 121, and the secondary coil 112 is arranged in the secondary cold storage container 122. The entry end of one-level coil pipe 111 is equipped with fan 2, the exit end of one-level coil pipe 111 is connected the entry end of second grade coil pipe 112, the exit end intercommunication of second grade coil pipe 112 storehouse 3 and atmosphere. The bottom of the primary cold accumulation container 121 is connected with the top of the secondary cold accumulation container 122, the upper part of the side wall of the secondary cold accumulation container 122 is provided with a liquid oxygen inlet, the inside of the secondary cold accumulation container is provided with a liquid level meter L1, and the top wall of the primary cold accumulation container 121 is provided with an oxygen discharge port.
The primary cold storage container 121 is used for storing oxygen at a temperature lower than the atmospheric temperature, and the secondary cold storage container 122 is used for storing liquid oxygen at a lower temperature. Because the liquid oxygen inlet is arranged in the secondary heat exchange container, the total amount of the liquid oxygen in the whole heat exchanger does not exceed the volume of the secondary cold accumulation container. The fan 2 conveys air to the primary coil 111 to perform first heat exchange with low-temperature oxygen, and then enters the secondary coil 112 to perform second heat exchange with lower-temperature liquid oxygen. The vaporized low-temperature oxygen is recycled after the cold energy of the liquid oxygen is utilized, so that the energy is saved, and the environment is protected.
According to an embodiment of the present invention, the ratio of the volumes of the primary cold storage container 121 and the secondary cold storage container 122 is greater than 10: 1. Because the volume change is great after the liquid oxygen vaporizes, the volume ratio of the primary cold accumulation container 121 to the secondary cold accumulation container 122 is more than 10, so that the safety of the utility model can be enhanced.
According to an embodiment of the present invention, the ratio of the lengths of the primary coil 111 and the secondary coil 112 is greater than 10: 1. The ratio of the lengths of the primary coil 111 and the secondary coil 112 is greater than 10:1, so that the cold energy of low-temperature oxygen can be utilized as far as possible, and the temperature of air in the secondary coil 112 can be reduced as far as possible, so that the temperature difference between liquid oxygen and air in the secondary coil 112 is reduced, and the dangers of bumping and the like caused by rapid vaporization of the liquid oxygen due to overlarge temperature difference are prevented.
According to the utility model discloses an embodiment, the pressure release mouth has still been opened to one-level cold-storage container 121 roof, the pressure release mouth is equipped with the relief valve, is used for reducing air pressure in one-level cold-storage container 121 prevents that air pressure in one-level cold-storage container 121 from too big causing danger.
By arranging the interlocking control system, the utility model can ensure that the storehouse refrigeration and the liquid oxygen vaporization can be simultaneously and normally operated under different states; by arranging the liquid oxygen vaporizer, liquid oxygen can be rapidly discharged under special conditions, and the safety of the refrigeration house is improved; by arranging the two-stage coil pipe and the two-stage cold accumulation container, the vaporized low-temperature oxygen is recycled after the cold energy of the liquid oxygen is utilized, the energy is saved, and the environment is protected.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.
Claims (9)
1. A refrigeration house utilizing liquid oxygen cold energy to refrigerate is characterized by comprising a cold storage type coil heat exchanger (1), a fan (2), a storage house (3) and an interlocking control system (4),
the cold accumulation type coil heat exchanger (1) comprises a coil (11) and a cold accumulation container (12),
the upper part of the side wall of the cold accumulation container (12) is provided with a liquid oxygen inlet, the top wall is provided with an oxygen discharge port, and a liquid level meter (L1) is arranged inside the cold accumulation container;
the coil pipe (11) is arranged in the cold accumulation container (12), the coil pipe (11) comprises an inlet end and an outlet end, and the two ends respectively penetrate through the side wall of the cold accumulation container (12) to extend out;
the fan (2) is connected with the inlet end of the coil (11) and is used for inputting air into the coil (11);
the storehouse (3) is connected with the outlet end of the coil pipe (11), an air inlet valve (V2) is arranged at the joint, and a thermometer (T1) is arranged in the storehouse (3);
the outlet end of the coil pipe (11) is also communicated with the atmosphere, and an emptying valve (V1) is arranged at the joint;
the interlocking control system (4) is electrically connected with the liquid level meter (L1) and the fan and is used for controlling the liquid level of the cold storage coil heat exchanger (1);
the interlock control system (4) is also electrically connected to the thermometer (T1), the air inlet valve (V2) and the air release valve (V1) for controlling the temperature of the warehouse (3).
2. The refrigeration storage according to claim 1, further comprising a gas distributor connected to the outlet end of the coil (11) and disposed in the storage room (3).
3. The freezer according to claim 1, further comprising an alarm device electrically connecting the level gauge (L1) and the thermometer (T1).
4. The refrigeration storage according to claim 1, characterized in that the fan (2) is connected with the storage room (3) and is used for circularly cooling air in the storage room (3).
5. Freezer according to claim 1, characterized in that further comprises a liquid oxygen vaporizer (5),
the bottom wall of the cold accumulation container (12) is also provided with an emergency discharge port connected with the liquid oxygen vaporizer (5), and the emergency discharge port is provided with an emergency discharge valve (V3);
the outlet end of the coil (11) is communicated with the atmosphere through the liquid oxygen vaporizer (5).
6. Freezer according to claim 1, characterized in that the coil (11) comprises a primary coil (111) and a secondary coil (112), the cold storage container (12) comprises a primary cold storage container (121) and a secondary cold storage container (122),
the primary coil (111) is arranged in the primary cold accumulation container (121), and the secondary coil (112) is arranged in the secondary cold accumulation container (122);
a fan (2) is arranged at the inlet end of the primary coil (111), the outlet end of the primary coil (111) is connected with the inlet end of the secondary coil (112), and the outlet end of the secondary coil (112) is communicated with the storehouse (3) and the atmosphere;
the bottom of one-level cold accumulation container (121) is connected with the top of second grade cold accumulation container (122), second grade cold accumulation container (122) lateral wall upper portion is equipped with liquid oxygen entry, and inside is equipped with level gauge (L1), one-level cold accumulation container (121) roof is equipped with the oxygen discharge port.
7. Freezer according to claim 6, characterized in that the ratio of the volumes of the primary cold storage container (121) and the secondary cold storage container (122) is greater than 10: 1.
8. The freezer according to claim 6, characterized in that the ratio of the lengths of the primary coil (111) and the secondary coil (112) is greater than 10: 1.
9. The refrigeration house according to claim 6, characterized in that the top wall of the primary cold accumulation container (121) is further opened with a pressure relief opening, and the pressure relief opening is provided with a pressure relief valve for reducing the air pressure in the primary cold accumulation container (121).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022272512.7U CN213514554U (en) | 2020-10-13 | 2020-10-13 | Refrigeration house utilizing liquid oxygen cold energy for refrigeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022272512.7U CN213514554U (en) | 2020-10-13 | 2020-10-13 | Refrigeration house utilizing liquid oxygen cold energy for refrigeration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213514554U true CN213514554U (en) | 2021-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022272512.7U Active CN213514554U (en) | 2020-10-13 | 2020-10-13 | Refrigeration house utilizing liquid oxygen cold energy for refrigeration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213514554U (en) |
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- 2020-10-13 CN CN202022272512.7U patent/CN213514554U/en active Active
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