CN212902242U - Nitrogen making device with single refrigerating unit tower - Google Patents
Nitrogen making device with single refrigerating unit tower Download PDFInfo
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- CN212902242U CN212902242U CN202021312837.7U CN202021312837U CN212902242U CN 212902242 U CN212902242 U CN 212902242U CN 202021312837 U CN202021312837 U CN 202021312837U CN 212902242 U CN212902242 U CN 212902242U
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
- F25J3/0423—Subcooling of liquid process streams
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04278—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using external refrigeration units, e.g. closed mechanical or regenerative refrigeration units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04333—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams
- F25J3/04339—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of air
- F25J3/04345—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of air and comprising a gas work expansion loop
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04375—Details relating to the work expansion, e.g. process parameter etc.
- F25J3/04393—Details relating to the work expansion, e.g. process parameter etc. using multiple or multistage gas work expansion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/044—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a single pressure main column system only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/72—Refluxing the column with at least a part of the totally condensed overhead gas
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
A nitrogen making device with a refrigerating unit single tower comprises a self-cleaning air filter, a turbine air compressor, an air precooling unit, a molecular sieve purifier group, a high-temperature turboexpander, a cooler, a main heat exchanger, a refrigerating unit, a rectifying tower, a condensing evaporator, a low-temperature turboexpander, a subcooler and an electric heater; also comprises nitrogen and liquid nitrogen preparation methods. The utility model discloses a freezing unit reduces the temperature of expander entrance point, improves main heat exchanger's heat transfer performance, guarantees to get into the effect of the definite rectifying column air separation of rectifying column and the efficiency arrival of condensation evaporimeter liquid nitrogen production and predetermines the requirement.
Description
Technical Field
The utility model relates to a take nitrogen generator of refrigerating unit single tower belongs to air separation plant technical field.
Background
The nitrogen product plays an important role in industrial production and manufacturing, the demand of the nitrogen and liquid nitrogen products is increased with the development of the society, and how to improve the production efficiency of the nitrogen and liquid nitrogen products is particularly important. The raw material air is separated at low temperature in the rectifying tower to obtain high-concentration nitrogen and then condensed to obtain a liquid nitrogen product, but when the temperature of the raw material air entering the rectifying tower does not reach the air liquefaction measuring range (or the air liquefaction degree is low), the yield of the nitrogen and the liquid nitrogen does not reach the preset requirement, and the working efficiency of the device is low.
Disclosure of Invention
An object of the utility model is to overcome the weak point of prior art's existence, provide a take nitrogen making device of refrigerating unit single tower, ensure that the air temperature who gets into the rectifying column reduces to predetermineeing the requirement, improve the work efficiency of device system nitrogen gas, liquid nitrogen.
The utility model aims at accomplishing through following technical scheme, a take nitrogen plant of refrigerating unit single tower, include self-cleaning formula air cleaner, turbine air compressor, precooling unit, molecular sieve clarifier group that connect gradually through the pipeline, high temperature expansion unit, cooler, main heat exchanger, refrigerating unit, rectifying column, condensation evaporator, subcooler, low temperature expander, electric heater.
The fuel air is filtered by a self-cleaning air filter and then enters a turbine air compressor, the turbine air compressor boosts the air and then sends the air into a precooler unit, the air after precooling enters a molecular sieve purifier group to adsorb moisture, CO2, C2H2 and other harmful impurities in the air, then enters a booster end of a high-temperature expansion unit to boost the air, a cooler in an outlet pipeline cools the boosted air and then enters a main heat exchanger, the main heat exchanger is connected with a refrigerating unit, the air after being refrigerated enters the main heat exchanger, wherein the air is divided into two paths in the main heat exchanger, and one path of the air enters the expansion end of the high-temperature expansion unit to be expanded and cooled and then passes through the main heat exchanger to reach an air inlet end; the other path reaches the lower part of the rectifying tower for air separation, an output pipeline is arranged at the top of the rectifying tower, high-concentration nitrogen is output and then divided into two paths, one path flows through the main heat exchanger and is supplied to the outside, the other path reaches the condensing evaporator for condensation, an output pipeline is arranged at the bottom of the rectifying tower, low-temperature oxygen-enriched liquid air is sent into the condensing evaporator to be used as a cold source for nitrogen condensation, an outlet pipeline is arranged at the bottom of the condensing evaporator, the liquid nitrogen flows out and is divided into two paths, one path is cooled by the subcooler and then is supplied to the outside, and the other path flows into the bottom;
the upper end of the condensation evaporator is provided with an outlet pipeline, sewage nitrogen on the upper part of the condensation evaporator flows out of the pipeline and enters the main heat exchanger to reach the expansion end of the low-temperature expansion machine, the sewage nitrogen after low-temperature expansion sequentially enters the subcooler and the main heat exchanger and then is divided into two paths, one path is discharged to the outside, and the other path enters the electric heater to be heated and then enters the molecular sieve purifier group.
The utility model has the characteristics of simple device, convenient use, good nitrogen making effect and the like.
Drawings
Fig. 1 is a flow chart of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings: as shown in figure 1, the nitrogen making device with the single tower of the refrigerating unit comprises an air filter AF, a turbine air compressor TC, a precooler unit RU and a molecular sieve purifier group MS, wherein the air filter AF sends filtered air into the turbine air compressor TC through a pipeline 01, the turbine air compressor TC pressurizes the air, then the air is sent into the precooler unit RU through a pipeline 02, and the air is sent into the molecular sieve purifier group MS through a pipeline 03 after being cooled so as to make the air in the air contain moisture and CO2、C2H2After harmful impurities are adsorbed, the air enters a pressurizing end of a high-temperature expansion unit ET1 through a pipeline 04 to be pressurized, the air is cooled and sent to a main heat exchanger E1 through a cooler WE in a pipeline 05 after being pressurized, the air reaches a refrigerating unit YU through a pipeline 06, the air after being refrigerated enters a main heat exchanger E1 again through a pipeline 07 and then is divided into two paths, one path enters an expansion end of the high-temperature expansion unit ET1 through a pipeline 08, and the air after being expanded and refrigerated enters a main exchange end through a pipeline 09The heat exchanger is reheated and then reaches a pipeline 01 at the TC inlet end of the turbine air compressor; the other path enters the lower part of a rectifying tower C1 through a pipeline 11 for air separation, high-purity nitrogen obtained at the top of the rectifying tower C1 is output from a pipeline 12 and then divided into two paths, one path reaches a main heat exchanger E1 through a pipeline 14 for reheating and then supplies finished nitrogen to the outside through a pipeline 15, the other path sends the nitrogen to a condensation evaporator K1 through a pipeline 13, meanwhile, a pipeline 16 sends oxygen-enriched liquid air at the lower part of the rectifying tower C1 to a condensation evaporator K1 to be used as a cold source for nitrogen condensation, the condensed liquid nitrogen is output from a pipeline 17 and then divided into two paths, the other path flows into the upper part of the rectifying tower C1 through a pipeline 18 to be left to participate in rectification, and the other path enters a subcooler E2 through a pipeline 19 to supply finished.
The upper part of the condensation evaporator K1 is provided with an outlet pipeline 21, dirty nitrogen enters a main heat exchanger E1 from the pipeline for reheating and enters a low-temperature expander ET2 through the pipeline 21, the dirty nitrogen enters a subcooler E2 through a pipeline 22 after expansion and refrigeration for heat exchange and enters a main heat exchanger E1 through a pipeline 23 for reheating, the dirty nitrogen after reheating is divided into two paths, one path of the dirty nitrogen is discharged to the outside through a pipeline 24, the other path of the dirty nitrogen enters an electric heater EH through the pipeline 25, and the dirty nitrogen after heating enters a molecular sieve purifier group MS through the pipeline 26 to serve as regeneration gas.
Wherein the molecular sieve purifier group MS comprises a first molecular sieve purifier MS1 and a second molecular sieve purifier MS2, and the first molecular sieve purifier MS1 and the second molecular sieve purifier MS2 alternately work.
A method for producing nitrogen by a single tower with a refrigerating unit comprises the steps that raw material air is filtered by a self-cleaning air filter AF and then enters an air compressor TC for pressurization, the pressure reaches 0.89MPa after pressurization, the raw material air enters a precooling unit RU for precooling, the temperature is reduced to 283K from 313K after precooling, the air after precooling reaches a molecular sieve purifier group MS, and the air after encountering cold absorbs moisture and CO in the air to adsorb the moisture and CO in the air2、C2H2After the harmful impurities are mixed, the mixture enters a supercharging end of a high-temperature expansion unit ET1 for supercharging, the pressure reaches 1.0MPa after the supercharging, the mixture is cooled by a cooler and enters a main heat exchanger E1, then enters a refrigerating unit YU for cooling, then enters a main heat exchanger E1, the air at an outlet end is divided into two paths, and one path of air enters the high-temperature expansion unit ET1 (an inlet port E1) after coming out of the main heat exchanger E1The temperature is 146K), the temperature after expansion and temperature reduction is 89K, the temperature after reheating in the main heat exchanger E1 is 311K, and the temperature finally flows into the inlet end of the air compressor TC for repeated circulation; the other path of the nitrogen-enriched liquid flows out of the main heat exchanger E1, the temperature of the nitrogen-enriched liquid is 105K, the nitrogen-enriched liquid enters the rectifying tower C1 for air separation, high-concentration nitrogen is obtained from the top of the rectifying tower C1, one part of the nitrogen-enriched liquid is heated by the main heat exchanger E1 and then directly supplies finished nitrogen to the outside, the other part of the nitrogen-enriched liquid reaches the condensing evaporator K1, meanwhile, oxygen-enriched liquid air at the bottom of the rectifying tower C1 is sent to the condensing evaporator K1 and serves as a cold source for nitrogen condensation, the generated liquid nitrogen flows out from an outlet at the lower end of the condensing evaporator K1 and then is divided into two paths, one path of the liquid nitrogen enters the subcooler E.
The upper end of the condensation evaporator K1 is provided with an outlet pipeline, the sewage nitrogen on the upper part of the condensation evaporator K1 flows out of the pipeline, enters the main heat exchanger E1 to reach the expansion end (inlet temperature 113K) of the low-temperature expansion machine ET2, enters the subcooler E2 and the main heat exchanger E1 after low-temperature expansion, and is divided into two paths, one path is discharged to the outside, and the other path enters the electric heater EH to be heated and then enters the molecular sieve purifier group MS.
The utility model discloses a freezing unit reduces the temperature of expander entrance point, improves main heat exchanger's heat transfer performance, guarantees to get into the effect of the definite rectifying column air separation of rectifying column and the efficiency arrival of condensation evaporimeter liquid nitrogen production and predetermines the requirement.
Claims (1)
1. The utility model provides a take nitrogen generator of refrigerating unit single tower, mainly include self-cleaning formula air cleaner (AF), turbine air compressor (TC), precooler group (RU), molecular sieve purifier group (MS), high temperature expander group (ET1), cooler (WE), main heat exchanger (E1), refrigerating unit (YU), rectifying column (C1), condensation evaporator (K1), subcooler (E2), low temperature expander (ET2), Electric Heater (EH), its characterized in that: the Air Filter (AF) is connected with a turbine air compressor (TC) through a pipeline, and the air filter filters the air and then pressurizes the air; the precooling unit (RU) is connected with the turbine air compressor (TC), and the pressurized air enters the precooling unit for precooling; the molecular sieveThe purifier set (MS) is connected with the precooler set (RU) and adsorbs water and CO in the air2、C2H2Harmful impurities; the expansion end of the high-temperature expansion unit (ET1) is connected with a molecular sieve purifier group (MS), the expansion end of the high-temperature expansion unit (ET1) is connected with the main heat exchanger (E1) to send fuel air into the main heat exchanger (E1), the main heat exchanger (E1) is connected with the refrigerating unit (YU), the refrigerated air enters the main heat exchanger (E1), the air is divided into two paths in the main heat exchanger (E1), and one path enters the expansion end of the high-temperature expansion unit (ET1) to be expanded and cooled and then passes through the main heat exchanger (E1) to reach the inlet end of the air compressor (TC); the other path reaches the lower part of a rectifying tower (C1) for air separation, an output pipeline is arranged at the top of the rectifying tower (C1), high-concentration nitrogen is output and then divided into two paths, one path flows through a main heat exchanger (E1) and is supplied to the outside, the other path reaches a condensation evaporator (K1) for condensation, an output pipeline is arranged at the bottom of the rectifying tower (C1), low-temperature oxygen-enriched liquid air is sent into the condensation evaporator (K1) and is used as a cold source for nitrogen condensation, an outlet pipeline is arranged at the bottom of the condensation evaporator (K1), liquid nitrogen flows out and is divided into two paths, one path is cooled by a subcooler (E2) and is supplied to the outside, and the other path flows down from the upper part of the rectifying tower (C1;
the upper end of the condensation evaporator (K1) is provided with an outlet pipeline, sewage nitrogen on the upper part of the condensation evaporator (K1) flows out from the pipeline and enters the main heat exchanger (E1) to reach the expansion end of the low-temperature expansion machine (ET2), the sewage nitrogen after low-temperature expansion enters the subcooler (E2) and the main heat exchanger (E1) in sequence and then is divided into two paths, one path is discharged to the outside, and the other path enters the Electric Heater (EH) to be heated and then enters the molecular sieve purifier group (MS).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021312837.7U CN212902242U (en) | 2020-07-07 | 2020-07-07 | Nitrogen making device with single refrigerating unit tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021312837.7U CN212902242U (en) | 2020-07-07 | 2020-07-07 | Nitrogen making device with single refrigerating unit tower |
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| CN212902242U true CN212902242U (en) | 2021-04-06 |
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| CN202021312837.7U Active CN212902242U (en) | 2020-07-07 | 2020-07-07 | Nitrogen making device with single refrigerating unit tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811211A (en) * | 2020-07-07 | 2020-10-23 | 杭州杭氧低温液化设备有限公司 | Nitrogen production device and method with refrigerating unit single tower |
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2020
- 2020-07-07 CN CN202021312837.7U patent/CN212902242U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811211A (en) * | 2020-07-07 | 2020-10-23 | 杭州杭氧低温液化设备有限公司 | Nitrogen production device and method with refrigerating unit single tower |
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Address after: 799 Xiangfu Road, Qingshanhu street, Lin'an District, Hangzhou City, Zhejiang Province Patentee after: HANGZHOU HANGYANG CRYOGENIC LIQUEFY EQUIPMENT Co.,Ltd. Address before: 311305 No.99, East Ring Road, Qingshanhu street, Lin'an, Hangzhou, Zhejiang Patentee before: HANGZHOU HANGYANG CRYOGENIC LIQUEFY EQUIPMENT Co.,Ltd. |
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| CP02 | Change in the address of a patent holder |