Dry ice tail gas liquefaction device

Abstract

The utility model relates to dry ice tail gas treatment technical field especially, relate to a kind of dry ice tail gas liquefaction device, comprising: air bag, compressor and first condenser, the import end of air bag is connected with the tail gas exhaust of dry ice making machine, the import end of compressor is connected with the export end of air bag, the import end of first condenser is connected with the export end of compressor, the import end of first condenser is connected with the liquid inlet end of dry ice making machine.The utility model is provided with the design mode that air bag is set on compressor, absorbs or releases carbon dioxide by the contraction and expansion of air bag, to adjust the pressure of compressor import end gas, to ensure that the pressure of gas in compressor does not fluctuate, so that dry ice tail gas liquefaction processing is not affected, simultaneously, by dynamic regulation to gas pressure in compressor, the pressure of gas in entire device can be ensured not to exceed threshold value, thereby avoiding carbon dioxide leakage or explosion.

Description

Technical Field

[0001] This utility model relates to the field of dry ice exhaust gas treatment technology, and in particular to a dry ice exhaust gas liquefaction device. Background Technology

[0002] Dry ice (i.e., solid carbon dioxide) is a white, ice-like solid with a density greater than ordinary ice, approximately 1.56 g / cm³. 3 Dry ice is widely used in petroleum, chemical, power, food, and pharmaceutical industries. Currently, dry ice is produced using a dry ice maker. The principle is that when liquid carbon dioxide passes through the dry ice maker, part of it releases heat and solidifies to form dry ice, while the other part absorbs heat and vaporizes to form gaseous carbon dioxide. This gaseous carbon dioxide is the exhaust gas from the dry ice maker. If this exhaust gas (i.e., gaseous carbon dioxide) is directly released into the atmosphere, it will contribute to the greenhouse effect and also waste the carbon dioxide raw material. Therefore, we urgently need a dry ice exhaust gas liquefaction device to recover and reuse the exhaust gas.

[0003] Currently, dry ice exhaust liquefaction devices include a compressor and a condenser. The exhaust gas from the dry ice maker is fed into the compressor and, after passing through the condenser, is finally returned to the dry ice as liquid carbon dioxide. However, during the dry ice exhaust liquefaction process, the exhaust gas from the dry ice maker is directly fed into the compressor, causing the internal pressure of the entire device to fluctuate significantly. This can affect the liquefaction of gaseous carbon dioxide. Furthermore, if the internal pressure of the entire device reaches a threshold, it can lead to carbon dioxide leakage or even an explosion. Utility Model Content

[0004] In response to the shortcomings of the existing production technology, the applicant provides a dry ice tail gas liquefaction device. By improving the structure of the dry ice tail gas liquefaction device, the internal gas pressure can be regulated to ensure that the internal gas pressure does not fluctuate, so as to facilitate the liquefaction of gaseous carbon dioxide.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A dry ice exhaust liquefaction device includes: a gas bladder, a compressor, and a first condenser. The inlet of the gas bladder is connected to the exhaust outlet of a dry ice maker. The gas bladder is used to store gaseous carbon dioxide produced by the dry ice maker. The inlet of the compressor is connected to the outlet of the gas bladder to compress the gaseous carbon dioxide produced by the dry ice maker. The inlet of the first condenser is connected to the outlet of the compressor, and the outlet of the first condenser is connected to the liquid inlet of the dry ice maker. The first condenser condenses the gaseous carbon dioxide compressed by the compressor to form liquid carbon dioxide, and the condensed liquid carbon dioxide is returned to the dry ice maker for recycling.

[0007] Therefore, by incorporating an airbag into the compressor, this method offers a simpler structure and easier operation compared to existing direct compression of exhaust gas. The airbag's contraction and expansion absorbs or releases carbon dioxide, regulating the pressure within the compressor to prevent pressure fluctuations and ensure uninterrupted liquefaction of the dry ice exhaust gas. Furthermore, dynamic pressure regulation ensures the overall pressure within the device does not exceed a threshold, preventing carbon dioxide leakage or explosion and improving operational safety. Additionally, when the device needs to be shut down or reaches its liquefaction limit, the airbag acts as a buffer to temporarily store unliquefied carbon dioxide.

[0008] As a further improvement to the above technical solution: the compressor includes a primary compression section and a secondary compression section. The inlet end of the primary compression section is connected to the outlet end of the gas bladder, the inlet end of the secondary compression section is connected to the outlet end of the primary compression section, and the outlet end of the secondary compression section is connected to the inlet end of the first condenser. The primary compression section is used to perform primary compression processing on the gaseous carbon dioxide produced by the dry ice maker, and the secondary compression section is used to perform secondary compression processing on the gaseous carbon dioxide produced by the dry ice maker. Therefore, the primary and secondary compression sections enable secondary compression processing of gaseous carbon dioxide, thereby improving the compression effect of carbon dioxide.

[0009] As a further improvement to the above technical solution, it also includes: a first oil separator and a second condenser. The inlet end of the first oil separator is connected to the outlet end of the first-stage compression section, the inlet end of the second condenser is connected to the outlet end of the first oil separator, and the outlet end of the second condenser is connected to the inlet end of the second-stage compression section. The first oil separator is used to remove oil from the gaseous carbon dioxide after the first-stage compression process, and the second condenser is used to condense the gaseous carbon dioxide after the first-stage compression process. Thus, the first oil separator can remove oil from the gaseous carbon dioxide after the first-stage compression process, preventing these oil contaminants from condensing into droplets or solid particles under low temperature or high pressure conditions, adhering to the inside of the compressor, and causing problems such as pipe blockage and valve jamming, thereby ensuring the normal operation of the compressor.

[0010] As a further improvement to the above technical solution, it also includes: a second oil separator, a third condenser, and a third oil separator. The inlet end of the second oil separator is connected to the outlet end of the secondary compression section. The inlet end of the third condenser is connected to the outlet end of the second oil separator. The inlet end of the third oil separator is connected to the outlet end of the third condenser. The outlet end of the third oil separator is connected to the liquid inlet end of the first condenser. The second oil separator is used to remove oil from the gaseous carbon dioxide after secondary compression. The third condenser is used to condense the gaseous carbon dioxide after secondary compression. The third oil separator is used to remove oil from the gaseous carbon dioxide after secondary compression. Therefore, the second and third oil separators can remove oil from the gaseous carbon dioxide after two-stage compression, preventing it from condensing into droplets or solid particles under low temperature or high pressure conditions and adhering to the inside of the compressor, causing problems such as pipe blockage and valve jamming, thus ensuring the normal operation of the compressor. The second and third oil separators can achieve two oil removal processes for the gaseous carbon dioxide after two-stage compression, ensuring that the oil in the gaseous carbon dioxide is fully removed so that it is free of impurities after being converted into liquid carbon dioxide.

[0011] As a further improvement to the above technical solution, the airbag is equipped with a vent valve. Therefore, periodically venting the airbag through the vent valve helps to check its condition, promptly detect any leaks or other problems, facilitates maintenance and upkeep, extends the airbag's lifespan, and simultaneously prevents the leakage of carbon dioxide exhaust gas from the dry ice generator.

[0012] As a further improvement to the above technical solution, it also includes: a cabinet, wherein the airbag, the compressor and the first condenser are all installed in the cabinet, and the airbag is located above the compressor and the first condenser.

[0013] As a further improvement to the above technical solution, it also includes: a first connecting pipe, wherein the inlet end of the airbag is connected to the exhaust outlet of the dry ice maker through the first connecting pipe, and a first mounting block is provided on the side of the first connecting pipe near the dry ice maker; a first snap-fit ​​block is provided on the side wall of the cabinet, and the first mounting block is adapted to the first snap-fit ​​block. Thus, through the cooperation of the first mounting block and the first snap-fit ​​block, the first connecting pipe can be fixed in place when the entire device is not in use, ensuring that the end of the first connecting pipe does not drag on the ground, thereby improving the service life of the first connecting pipe.

[0014] As a further improvement to the above technical solution, it also includes: a second connecting pipe, wherein the outlet end of the first condenser is connected to the inlet end of the dry ice maker via the second connecting pipe, and a second mounting block is provided on the side of the second connecting pipe near the dry ice maker; a second snap-fit ​​block is provided on the side wall of the cabinet, the second snap-fit ​​block and the first snap-fit ​​block are located on the same side of the cabinet, and the second mounting block is adapted to the first snap-fit ​​block. Thus, through the cooperation of the second mounting block and the second snap-fit ​​block, the second connecting pipe can be fixed in place when the entire device is not in use, ensuring that the end of the second connecting pipe does not drag on the ground, thereby improving the service life of the second connecting pipe.

[0015] The beneficial effects of this utility model are as follows:

[0016] By incorporating an air bladder into the compressor, this method offers a simpler structure and easier operation compared to existing direct compression of exhaust gas. The air bladder's contraction and expansion absorbs or releases carbon dioxide, regulating the pressure of the gas at the compressor inlet. This ensures that the pressure within the compressor remains stable, preventing fluctuations that could affect the liquefaction of dry ice exhaust gas. Furthermore, dynamic pressure regulation within the compressor ensures that the overall pressure within the device does not exceed a threshold, preventing carbon dioxide leakage or explosion and improving the safety of the entire system. Additionally, when the system needs to be shut down or reaches its liquefaction limit, the air bladder acts as a buffer to temporarily store unliquefied carbon dioxide.

[0017] This utility model also has the following advantages:

[0018] 1. This utility model can achieve secondary compression of gaseous carbon dioxide through a primary compression section and a secondary compression section, thereby improving the compression effect of carbon dioxide.

[0019] 2. This utility model uses a first oil separator to remove oil from gaseous carbon dioxide that has been compressed in one stage, thereby preventing oil stains from condensing into droplets or solid particles under low temperature or high pressure conditions and adhering to the inside of the compressor, causing problems such as pipe blockage and valve jamming, thus ensuring the normal operation of the compressor.

[0020] 3. This utility model uses a second and a third oil separator to perform oil removal on gaseous carbon dioxide after two-stage compression, thereby removing oil contaminants from the gaseous carbon dioxide. This prevents these oil contaminants from condensing into droplets or solid particles under low temperature or high pressure conditions, adhering to the inside of the compressor, and causing problems such as pipe blockage and valve jamming, thus affecting the normal operation of the compressor. The second and third oil separators enable two oil removal processes on the gaseous carbon dioxide after two-stage compression, ensuring that the oil contaminants in the gaseous carbon dioxide are fully removed so that it is free of impurities after being converted into liquid carbon dioxide. Attached Figure Description

[0021] Figure 1 This is a system diagram of the dry ice tail gas liquefaction device of this utility model;

[0022] Figure 2 This is a first-view structural schematic diagram of the dry ice tail gas liquefaction device of this utility model.

[0023] Figure 3 This is a second-view structural schematic diagram of the dry ice tail gas liquefaction device of this utility model.

[0024] Among them: 1. Airbag;

[0025] 101. Drain valve;

[0026] 2. Dry ice making machine;

[0027] 3. Compressor;

[0028] 301. Primary compression section; 302. Secondary compression section;

[0029] 4. First condenser;

[0030] 5. Cabinet;

[0031] 501, First card connector; 502, Second card connector;

[0032] 6. First connecting tube;

[0033] 601, First mounting block;

[0034] 7. Second connecting pipe;

[0035] 701, Second mounting block;

[0036] 8. First oil separator;

[0037] 9. Second condenser;

[0038] 10. Second oil separator;

[0039] 11. Third condenser;

[0040] 12. Third oil separator. Detailed Implementation

[0041] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0042] like Figures 1 to 3 The diagram shows the preferred embodiment of this utility model. The dry ice exhaust gas liquefaction device of this embodiment includes: an air bag 1, a compressor 3, and a first condenser 4. The inlet end of the air bag 1 is connected to the exhaust outlet of the dry ice making machine 2. The air bag 1 is used to store the gaseous carbon dioxide after the dry ice making machine 2 makes dry ice. The inlet end of the compressor 3 is connected to the outlet end of the air bag 1 to compress the gaseous carbon dioxide after the dry ice making machine 2 makes dry ice. The inlet end of the first condenser 4 is connected to the outlet end of the compressor 3. The outlet end of the first condenser 4 is connected to the liquid inlet end of the dry ice making machine 2. The first condenser 4 condenses the gaseous carbon dioxide after the compressor 3 compresses it to form liquid carbon dioxide, and the liquid carbon dioxide formed after condensation is returned to the dry ice making machine 2 for recycling. Therefore, by incorporating an airbag 1 into the compressor 3, compared to existing methods that directly compress exhaust gas, this approach is simpler in structure and easier to operate. The airbag 1 absorbs or releases carbon dioxide through contraction and expansion, regulating the gas pressure within the compressor 3 to ensure that pressure fluctuations do not affect the liquefaction of dry ice exhaust gas. Simultaneously, dynamic adjustment of the gas pressure at the compressor 3 inlet ensures that the overall gas pressure within the device does not exceed a threshold, preventing carbon dioxide leakage or explosion and improving the overall safety of the device's operation. Furthermore, when the device needs to be shut down or reaches its liquefaction limit, the airbag 1 can act as a buffer container to temporarily store unliquefied carbon dioxide.

[0043] In this embodiment, the compressor 3 includes a primary compression unit 301 and a secondary compression unit 302. The inlet end of the primary compression unit 301 is connected to the outlet end of the air bag 1, the inlet end of the secondary compression unit 302 is connected to the outlet end of the primary compression unit 301, and the outlet end of the secondary compression unit 302 is connected to the inlet end of the first condenser 4. The primary compression unit 301 is used to perform primary compression treatment on the gaseous carbon dioxide after the dry ice making machine 2 produces dry ice, and the secondary compression unit 302 is used to perform secondary compression treatment on the gaseous carbon dioxide after the dry ice making machine 2 produces dry ice. Thus, the primary compression unit 301 and the secondary compression unit 302 can achieve secondary compression treatment of gaseous carbon dioxide, thereby improving the compression effect of carbon dioxide.

[0044] In this embodiment, the system further includes a first oil separator 8 and a second condenser 9. The inlet of the first oil separator 8 is connected to the outlet of the primary compression unit 301, and the inlet of the second condenser 9 is connected to the outlet of the first oil separator 8. The outlet of the second condenser 9 is connected to the inlet of the secondary compression unit 302. The first oil separator 8 is used to remove oil from the gaseous carbon dioxide after primary compression, and the second condenser 9 is used to condense the gaseous carbon dioxide after primary compression. Thus, the first oil separator 8 removes oil from the gaseous carbon dioxide after primary compression, preventing it from condensing into droplets or solid particles under low temperature or high pressure conditions and adhering to the inside of the compressor 3, causing problems such as pipe blockage and valve jamming, thereby ensuring the normal operation of the compressor 3.

[0045] In this embodiment, the system further includes a second oil separator 10, a third condenser 11, and a third oil separator 12. The inlet end of the second oil separator 10 is connected to the outlet end of the secondary compression unit 302. The inlet end of the third condenser 11 is connected to the outlet end of the second oil separator 10. The inlet end of the third oil separator 12 is connected to the outlet end of the third condenser 11. The outlet end of the third oil separator 12 is connected to the liquid inlet end of the first condenser 4. The second oil separator 10 is used to remove oil from the gaseous carbon dioxide after secondary compression. The third condenser 11 is used to condense the gaseous carbon dioxide after secondary compression. The third oil separator 12 is used to remove oil from the gaseous carbon dioxide after secondary compression. Therefore, the second oil separator 10 and the third oil separator 12 can perform oil removal treatment on the gaseous carbon dioxide after two-stage compression to remove oil stains from the gaseous carbon dioxide. This prevents these oil stains from condensing into droplets or solid particles under low temperature or high pressure conditions and adhering to the inside of the compressor 3, causing problems such as pipe blockage and valve jamming inside the compressor 3, thus affecting the normal operation of the compressor 3. The second oil separator 10 and the third oil separator 12 can achieve two oil removal treatments on the gaseous carbon dioxide after two-stage compression to ensure that the oil stains in the gaseous carbon dioxide can be fully removed so that it will not contain impurities after being converted into liquid carbon dioxide.

[0046] In this embodiment, the airbag 1 is equipped with an air release valve 101. Therefore, periodically releasing air from the airbag 1 through the air release valve 101 helps to check the condition of the airbag 1, promptly detect any leaks or other problems, facilitate maintenance and upkeep of the airbag 1, extend its service life, and simultaneously prevent the leakage of carbon dioxide exhaust gas from the dry ice generator 2.

[0047] Specifically, the vent valve 101 is installed on top of the airbag 1 to more effectively vent the air inside the airbag 1.

[0048] In this embodiment, the system also includes: cabinet 5, airbag 1, compressor 3 and first condenser 4 are all installed inside cabinet 5, and airbag 1 is located above compressor 3 and first condenser 4.

[0049] In this embodiment, the device further includes: a first connecting pipe 6, through which the inlet end of the airbag 1 is connected to the exhaust outlet of the dry ice maker 2; a first mounting block 601 is provided on the side of the first connecting pipe 6 near the dry ice maker 2; and a first snap-fit ​​block 501 is provided on the side wall of the cabinet 5, with the first mounting block 601 and the first snap-fit ​​block 501 being compatible. Thus, through the cooperation of the first mounting block 601 and the first snap-fit ​​block 501, the first connecting pipe 6 can be fixed in place when the entire device is not in use, ensuring that the end of the first connecting pipe 6 does not drag on the ground, thereby improving the service life of the first connecting pipe 6.

[0050] In this embodiment, the device further includes: a second connecting pipe 7, through which the outlet end of the first condenser 4 is connected to the inlet end of the dry ice maker 2; a second mounting block 701 is provided on the side of the second connecting pipe 7 near the dry ice maker 2; a second locking block 502 is provided on the side wall of the cabinet 5, and the second locking block 502 and the first locking block 501 are located on the same side of the cabinet 5, with the second mounting block 701 adapted to the first locking block 501. Thus, through the cooperation of the second mounting block 701 and the second locking block 502, the second connecting pipe 7 can be fixed in place when the entire device is not in use, ensuring that the end of the second connecting pipe 7 does not drag on the ground, thereby improving the service life of the second connecting pipe 7.

[0051] The liquefaction process of gaseous carbon dioxide in this invention is as follows: First, the first connecting pipe 6 is connected to the exhaust outlet of the dry ice maker 2, and the second connecting pipe 7 is connected to the inlet end of the dry ice maker 2. Finally, the first-stage compression unit 301, the first oil remover 8, the second condenser 9, the second-stage compression unit 302, the second oil remover 10, the third condenser 11, the third oil remover 12, and the first condenser 4 are started to sequentially perform compression, oil removal, condensation, compression, oil removal, condensation, oil removal, and condensation on the gaseous carbon dioxide, and finally convert the gaseous carbon dioxide into liquid carbon dioxide, which is then returned to the dry ice maker 2 for recycling.

[0052] In summary, this invention, by incorporating an airbag 1 into the compressor 3, offers a simpler and easier-to-operate structure compared to existing methods that directly compress exhaust gas. The airbag 1 absorbs or releases carbon dioxide through contraction and expansion, regulating the gas pressure within the compressor 3 to ensure that the pressure at the compressor 3 inlet does not fluctuate, thus preventing interference with the liquefaction of dry ice exhaust gas. Furthermore, the dynamic adjustment of the gas pressure within the compressor 3 ensures that the overall gas pressure within the device does not exceed a threshold, preventing carbon dioxide leakage or explosion and improving the overall safety of the device. Additionally, when the device needs to be shut down or reaches its liquefaction limit, the airbag 1 can act as a buffer container to temporarily store unliquefied carbon dioxide.

[0053] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A dry ice tail gas liquefaction device, characterized in that, include: Airbag (1), the inlet end of the airbag (1) is connected to the exhaust outlet of the dry ice making machine (2), and the airbag (1) is used to store gaseous carbon dioxide after the dry ice making machine (2) makes dry ice; The compressor (3) is connected to the outlet of the air bag (1) to compress the gaseous carbon dioxide produced by the dry ice maker (2) after it produces dry ice. The first condenser (4) has its inlet end connected to the outlet end of the compressor (3) and its outlet end connected to the liquid inlet end of the dry ice maker (2). The first condenser (4) condenses the gaseous carbon dioxide compressed by the compressor (3) to form liquid carbon dioxide, and then returns the liquid carbon dioxide formed after condensation to the dry ice maker (2) for recycling.

2. The dry ice tail gas liquefaction device as described in claim 1, characterized in that: The compressor (3) includes: The primary compression unit (301) and the secondary compression unit (302) are configured such that the inlet end of the primary compression unit (301) is connected to the outlet end of the airbag (1), the inlet end of the secondary compression unit (302) is connected to the outlet end of the primary compression unit (301), and the outlet end of the secondary compression unit (302) is connected to the inlet end of the first condenser (4). The primary compression unit (301) is used to perform primary compression treatment on the gaseous carbon dioxide after the dry ice is produced by the dry ice maker (2), and the secondary compression unit (302) is used to perform secondary compression treatment on the gaseous carbon dioxide after the dry ice is produced by the dry ice maker (2).

3. The dry ice tail gas liquefaction device as described in claim 2, characterized in that: Also includes: The first oil separator (8) and the second condenser (9) are connected. The inlet end of the first oil separator (8) is connected to the outlet end of the first-stage compression unit (301). The inlet end of the second condenser (9) is connected to the outlet end of the first oil separator (8). The outlet end of the second condenser (9) is connected to the inlet end of the second-stage compression unit (302). The first oil separator (8) is used to remove oil from the gaseous carbon dioxide after the first-stage compression process. The second condenser (9) is used to condense the gaseous carbon dioxide after the first-stage compression process.

4. The dry ice tail gas liquefaction device as described in claim 2, characterized in that: Also includes: The system comprises a second oil separator (10), a third condenser (11), and a third oil separator (12). The inlet of the second oil separator (10) is connected to the outlet of the secondary compression unit (302). The inlet of the third condenser (11) is connected to the outlet of the second oil separator (10). The inlet of the third oil separator (12) is connected to the outlet of the third condenser (11). The outlet of the third oil separator (12) is connected to the liquid inlet of the first condenser (4). The second oil separator (10) is used to remove oil from gaseous carbon dioxide after secondary compression. The third condenser (11) is used to condense gaseous carbon dioxide after secondary compression. The third oil separator (12) is used to remove oil from gaseous carbon dioxide after secondary compression.

5. The dry ice tail gas liquefaction device as described in claim 1, characterized in that: The airbag (1) is equipped with an air release valve (101).

6. The dry ice tail gas liquefaction device as described in claim 1, characterized in that: Also includes: The cabinet (5), the airbag (1), the compressor (3) and the first condenser (4) are all installed inside the cabinet (5), and the airbag (1) is located above the compressor (3) and the first condenser (4).

7. The dry ice tail gas liquefaction device as described in claim 6, characterized in that: Also includes: The first connecting pipe (6) is connected to the exhaust outlet of the dry ice maker (2) through the inlet end of the airbag (1). A first mounting block (601) is provided on the side of the first connecting pipe (6) near the dry ice maker (2). A first snap-fit ​​block (501) is provided on the side wall of the cabinet (5), and the first mounting block (601) is adapted to the first snap-fit ​​block (501).

8. The dry ice tail gas liquefaction device as described in claim 7, characterized in that: Also includes: The second connecting pipe (7) connects the outlet end of the first condenser (4) to the inlet end of the dry ice maker (2) through the second connecting pipe (7). A second mounting block (701) is provided on the side of the second connecting pipe (7) near the dry ice maker (2). A second latching block (502) is provided on the side wall of the cabinet (5). The second latching block (502) and the first latching block (501) are located on the same side of the cabinet (5). The second mounting block (701) is adapted to the first latching block (501).

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