Water removal device of liquefaction system
By setting up multi-stage dehydration devices in the liquefaction system and using a dew point detector to control the dehydration devices, the problem of icing and blockage caused by high dew points in the liquefaction system was solved, realizing automated dehydration and ensuring normal system operation and gas purity.
Patent Information
- Application Number
- CN202520414641.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-10
AI Technical Summary
The high dew point of gaseous carbon dioxide in existing liquefaction systems can easily lead to icing and blockage, affecting the normal operation of the system and even causing equipment damage.
Multi-stage dehydration devices are installed in the liquefaction system, and the opening and closing of the dehydration devices are controlled by a dew point detector to achieve automated dehydration, ensure good dehydration effect and prevent venting, thus avoiding freezing and blockage.
This effectively prevents icing and blockage in the liquefaction system, improves gas purity, and ensures the system operates in optimal condition.
Smart Images
Figure CN223925245U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to liquid carbon dioxide production technical field, concretely relates to a water removal device of liquefaction system. BACKGROUND
[0002] Carbon dioxide is a common compound in air, a carbon dioxide molecule is composed of two oxygen atoms and one carbon atom through covalent bond, is a colorless and odorless gas at normal temperature, the density is bigger than air, can dissolve in water, reacts with water to generate carbonic acid, does not support combustion. Solid carbon dioxide is commonly called dry ice after compression. It can be prepared by calcium carbonate decomposition under strong heat in industry.
[0003] A new carbon dioxide utilization technology - CO2 supercritical extraction technology is being developed at home and abroad. The technology can produce high value-added products, can extract substances that cannot be extracted by chemical methods in the past, and is cheap, non-toxic, safe and efficient. It is suitable for chemical, pharmaceutical, food and other industries. Carbon dioxide changes in nature when the temperature is higher than the critical temperature and the pressure is higher than the critical pressure, its density is close to liquid, its viscosity is close to gas, its diffusion coefficient is 100 times that of liquid, so it has amazing dissolving capacity. It can dissolve many substances, and then extract effective components, and has wide application.
[0004] At present, after the industrial preparation of carbon dioxide, due to the high dew point of gaseous carbon dioxide, it is easy to cause the icing blockage of liquefaction system, thereby affecting the normal operation of the system, and in serious cases, it will cause equipment damage. UTILITY MODEL CONTENT
[0005] The utility model aims at providing a water removal device of liquefaction system, adopting multistage automatic water removal, the water removal effect is good, can avoid the phenomenon of icing blockage of liquefaction system.
[0006] The technical scheme of the utility model is as follows:
[0007] The application discloses a water removal device of a liquefaction system, which comprises a carbon dioxide generator, a low-pressure compressor, a high-pressure compressor, a first purification tank, an adsorption drying pry, a second purification tank and a liquefaction purification system, wherein the output port of the carbon dioxide generator is connected with the input port of the low-pressure compressor through a first carbon dioxide conveying pipeline, the output port of the low-pressure compressor is connected with the input port of the high-pressure compressor through a second carbon dioxide conveying pipeline, the output port of the high-pressure compressor is connected with the input port of the first purification tank through a third carbon dioxide conveying pipeline, the third carbon dioxide conveying pipeline is provided with a first water removal device, the output port of the first purification tank is connected with the input port of the adsorption drying pry through a fourth carbon dioxide conveying pipeline, the fourth carbon dioxide conveying pipeline is provided with a second water removal device, the output port of the adsorption drying pry is connected with the input port of the second purification tank through a fifth carbon dioxide conveying pipeline, the fifth carbon dioxide conveying pipeline is provided with a third water removal device, and the output port of the second purification tank is connected with the input port of the liquefaction purification system through a sixth carbon dioxide conveying pipeline, and the sixth carbon dioxide conveying pipeline is provided with a fourth water removal device.
[0008] Further, the water removal rates of the first water removal device, the second water removal device, the third water removal device and the fourth water removal device are 20-30%.
[0009] Further, the fourth carbon dioxide conveying pipeline is further provided with a first dew point detector, the first dew point detector and the second water removal device are arranged in front of and behind the second water removal device, the signal output end of the first dew point detector is connected with the second water removal device, the first dew point detector starts the second water removal device when detecting that the dew point of carbon dioxide passing through the fourth carbon dioxide conveying pipeline is less than -74 DEG C and greater than -77 DEG C, and the first dew point detector does not start the second water removal device when detecting that the dew point of carbon dioxide passing through the fourth carbon dioxide conveying pipeline is -74 DEG C to -77 DEG C.
[0010] Further, the fifth carbon dioxide conveying pipeline is further provided with a second dew point detector, the second dew point detector and the third water removal device are arranged in front of and behind the third water removal device, the signal output end of the second dew point detector is connected with the third water removal device, the second dew point detector starts the third water removal device when detecting that the dew point of carbon dioxide passing through the fifth carbon dioxide conveying pipeline is less than -74 DEG C and greater than -77 DEG C, and the second dew point detector does not start the third water removal device when detecting that the dew point of carbon dioxide passing through the fifth carbon dioxide conveying pipeline is -74 DEG C to -77 DEG C.
[0011] Further, the sixth carbon dioxide conveying pipeline is also provided with a third dew point detector, the third dew point detector and the fourth water removal device are distributed in front and back, and the signal output end of the third dew point detector is connected with the fourth water removal device, the third dew point detector opens the fourth water removal device when detecting that the dew point of carbon dioxide passing through the sixth carbon dioxide conveying pipeline is less than -74℃ and greater than -77℃, and the third dew point detector does not open the fourth water removal device when detecting that the dew point of carbon dioxide passing through the sixth carbon dioxide conveying pipeline is between -74℃ and -77℃.
[0012] With respect to the prior art, the beneficial effects of the utility model lie in that the water removal device of the liquefaction system is provided with a set of water removal devices at the outlet of the high-pressure compressor, the outlet of the first purification tank, the outlet of the adsorption drying pry and the outlet of the second purification tank, and a set of dew point detectors are installed at the outlets of the first purification tank, the adsorption drying pry and the second purification tank, the water removal effect is good through multi-stage water removal, the phenomenon of ice blocking of the liquefaction system can be avoided, when the dew point detector detects that the dew point of carbon dioxide is within the qualified range, part of the water removal devices can be not opened, thereby realizing automatic water removal, the water removal device has the advantage of only discharging water but not discharging gas, the unorganized overflow of gas is greatly reduced, the purity of the gas is improved, and the system is ensured to operate in the optimal state. BRIEF DESCRIPTION OF DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor according to these drawings.
[0014] Figure 1 The structure diagram of the water removal device of the liquefaction system is provided. DETAILED DESCRIPTION
[0015] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail by combining with the drawings and embodiments of the utility model. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.
[0016] In order to illustrate the technical scheme described in the utility model, the following will be described by specific embodiments.
[0017] EMBODIMENT
[0018] Please refer to Figure 1The embodiment provides a water removal device of a liquefaction system, which comprises a carbon dioxide generator 1, a low-pressure compressor 2, a high-pressure compressor 3, a first purification tank 4, an adsorption drying pry 5, a second purification tank 6 and a liquefaction purification system 7, the output port of the carbon dioxide generator 1 is connected with the input port of the low-pressure compressor 2 through a first carbon dioxide conveying pipeline 8, the output port of the low-pressure compressor 2 is connected with the input port of the high-pressure compressor 3 through a second carbon dioxide conveying pipeline 9, the output port of the high-pressure compressor 3 is connected with the input port of the first purification tank 4 through a third carbon dioxide conveying pipeline 10, the third carbon dioxide conveying pipeline 10 is provided with a first water removal device 11, the output port of the first purification tank 4 is connected with the input port of the adsorption drying pry 5 through a fourth carbon dioxide conveying pipeline 12, the fourth carbon dioxide conveying pipeline 12 is provided with a first dew point detector 13 and a second water removal device 14 from front to back, the signal output end of the first dew point detector 13 is connected with the second water removal device 14, the output port of the adsorption drying pry 5 is connected with the input port of the second purification tank 6 through a fifth carbon dioxide conveying pipeline 15, the fifth carbon dioxide conveying pipeline 15 is provided with a second dew point detector 16 and a third water removal device 17 from front to back, the signal output end of the second dew point detector 16 is connected with the third water removal device 17, the output port of the second purification tank 6 is connected with the input port of the liquefaction purification system 7 through a sixth carbon dioxide conveying pipeline 18, the sixth carbon dioxide conveying pipeline 18 is provided with a third dew point detector 19 and a fourth water removal device 20 from front to back, the signal output end of the third dew point detector 19 is connected with the fourth water removal device 20.
[0019] The water removal device has the following process: gaseous carbon dioxide -> the low-pressure compressor 2 -> the high-pressure compressor 3 -> the first purification tank 4 -> the adsorption drying pry 5 -> the second purification tank 6 -> the liquefaction purification system 7.
[0020] The water removal device is provided with a set of water removal devices at the outlet of the high-pressure compressor 3, the outlet of the first purification tank 4, the outlet of the adsorption drying pry 5 and the outlet of the second purification tank 6 respectively, through multi-stage water removal, the water removal effect is good, and the phenomenon of ice blocking of the liquefaction system can be avoided.
[0021] The water removal rates of the first water removal device 11, the second water removal device 14, the third water removal device 17 and the fourth water removal device 20 are 20-30%. When the first dew point detector 13 detects that the dew point of the carbon dioxide passing through the fourth carbon dioxide conveying pipeline 12 is less than -74 DEG C and greater than -77 DEG C, the second water removal device 14 is started; when the first dew point detector 13 detects that the dew point of the carbon dioxide passing through the fourth carbon dioxide conveying pipeline 12 is -74 DEG C to -77 DEG C, the second water removal device 14 is not started; when the second dew point detector 16 detects that the dew point of the carbon dioxide passing through the fifth carbon dioxide conveying pipeline 15 is less than -74 DEG C and greater than -77 DEG C, the third water removal device 17 is started; when the second dew point detector 16 detects that the dew point of the carbon dioxide passing through the fifth carbon dioxide conveying pipeline 15 is -74 DEG C to -77 DEG C, the third water removal device 17 is not started; when the third dew point detector 19 detects that the dew point of the carbon dioxide passing through the sixth carbon dioxide conveying pipeline 18 is less than -74 DEG C and greater than -77 DEG C, the fourth water removal device 20 is started; when the third dew point detector 19 detects that the dew point of the carbon dioxide passing through the sixth carbon dioxide conveying pipeline 18 is -74 DEG C to -77 DEG C, the fourth water removal device 20 is not started. When the dew point detector detects that the dew point of the carbon dioxide is in the qualified range, part of the water removal devices can be not started, so that the automatic water removal is realized.
[0022] The water removal device has the advantages of only discharging water but not discharging gas, greatly reduces the unorganized overflow of gas, improves the purity of the gas, and ensures that the system operates in the optimal state.
[0023] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model, and any modification, equivalent replacement and improvement, etc. made in the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A water removal device for a liquefaction system, comprising: The carbon dioxide generator, the low-pressure compressor, the high-pressure compressor, the first purification tank, the adsorption drying pry, the second purification tank and the liquefied purification system are connected through the first carbon dioxide conveying pipeline, the second carbon dioxide conveying pipeline, the third carbon dioxide conveying pipeline, the fourth carbon dioxide conveying pipeline, the fifth carbon dioxide conveying pipeline and the sixth carbon dioxide conveying pipeline.
2. A water removal device for a liquefaction system as claimed in claim 1, characterized in that: The water removal rates of the first water removal device, the second water removal device, the third water removal device and the fourth water removal device are 20-30%.
3. A water removal device for a liquefaction system as claimed in claim 1, characterized in that: The fourth carbon dioxide conveying pipeline is provided with a first dew point detector, and the first dew point detector and the second water removal device are arranged in sequence, and the signal output end of the first dew point detector is connected with the second water removal device.
4. A water removal device for a liquefaction system as claimed in claim 1, characterized in that: The fifth carbon dioxide conveying pipeline is provided with a second dew point detector, and the second dew point detector and the third water removal device are arranged in sequence, and the signal output end of the second dew point detector is connected with the third water removal device.
5. A water removal device for a liquefaction system as claimed in claim 1, wherein: The sixth carbon dioxide conveying pipeline is provided with a third dew point detector, and the third dew point detector and the fourth water removal device are arranged in sequence, and the signal output end of the third dew point detector is connected with the fourth water removal device.