System for continuous freezing and dehydration of biogas and mixed gas

Abstract

The present invention is characterized by comprising: first and second air conditioner / heaters (10, 20) which supply a low-temperature heat medium or a high-temperature heat medium to first and second heat exchangers (100, 200), respectively; an inflow gas supply pipe (30) which selectively supplies an external biogas or mixed gas to the first and second heat exchangers (100, 200) as inflow gas; a processed gas discharge pipe (40) which discharges, as processed gas, inflow gas removed of moisture while selectively passing through the first heat exchanger (100) and the second heat exchanger (200); the first and second heat exchangers (100, 200) which are composed of tubes / cells, supply a low-temperature heat medium or a high-temperature heat medium supplied from first and second heat medium inlet ports (120, 220) to the tubes, supply a high-temperature inlet gas to the cells to freeze or heat the inlet gas with a heat medium in the tubes, and have first and second processed gas / condensate discharge ports (150, 250) for discharging condensate when removing frost; first and second condensate processors (50, 60) which have one end connected to the lower end of one side of the first and second processed gas / condensate discharge ports (150, 250), receive passing condensate, and discharge the condensate to the other end connected to an external line; and a freezing / restoring control device (300) which manages whether inflow gas is supplied, whether processed gas is discharged, and whether condensate is introduced or discharged.

Description

Continuous biogas and mixed gas refrigeration and dehumidification system

[0001] The present invention relates to a continuous biogas and mixed gas freezing and dehumidification system that can continuously remove moisture contained in biogas or mixed gas by performing freezing and dehumidification of biogas or mixed gas in one heat exchanger using a pair of heat exchangers, performing a restoration process if the size of frost generated during moisture removal is greater than a standard, and performing a freezing process in the other heat exchanger.

[0002] As direct landfilling and ocean dumping of organic waste (food waste, sewage sludge, livestock manure, etc.) are currently prohibited, facilities for biogasification and waste treatment and production / utilization of new and renewable energy sources (hydrogen) through land treatment and recycling are attracting attention.

[0003] Biogas is generated through an anaerobic digestion process, and its main components are methane (CH4) and carbon dioxide (CO2), along with trace gases such as ammonia (NH3), nitrogen (N2), and carbon monoxide (CO). In order to produce hydrogen based on the methane (CH4) generated here, impurities such as carbon dioxide (CO2), hydrogen sulfide (H2S), siloxane, and moisture (H2O) must be separated and removed. This process is called a pretreatment process.

[0004] After the pretreatment process, the process of increasing the methane (CH4) concentration to 96±1% is called the purification process, and when combined with the pretreatment process, it is also called the purification process.

[0005] Among these, technology development was carried out to resolve the following problems occurring in the existing pretreatment process, increase dehumidification efficiency, and ensure compliance with city gas quality standards and hydrogen reforming standards.

[0006] 1. Solving problems caused by pressure loss of feed gas in existing processes (minimizing pressure loss)

[0007] 2. Problems with equipment shutdown during maintenance due to replacement of adsorbents, etc.

[0008] 3. Problem of reduced dehumidification efficiency due to foreign substances such as oil generated from the gas compressor.

[0009] 4. Stable gas supply to the rear-end high-temperature treatment facility.

[0010] The purpose of the present invention is to provide a continuous biogas and mixed gas freezing and dehumidification system that can continuously remove moisture contained in biogas or mixed gas by performing freezing and dehumidification of biogas or mixed gas in one heat exchanger using a pair of heat exchangers, performing a restoration process if the size of frost generated during moisture removal is greater than a standard, and performing a freezing process in the other heat exchanger.

[0011] A continuous biogas and mixed gas freezing and dehumidification system according to the present invention comprises: first and second cooling and heating units (10, 20) which supply low-temperature heat medium or high-temperature heat medium to first and second heat exchangers (100, 200), respectively; an inlet gas supply pipe (30) which has one end connected to the outside and the other end branched to selectively supply external biogas or mixed gas as inlet gas to the first and second heat exchangers (100, 200); a treated gas discharge pipe (40) which has one end branched and is connected to the treated gas / condensate discharge port (150, 250) of the first and second heat exchangers (100, 200) and the other end branched to the outside to selectively discharge the inlet gas from which moisture has been removed while passing through the first heat exchanger (100) and the second heat exchanger (200) as treated gas; First and second heat exchangers (100, 200) having tubes / cells and supplying low-temperature or high-temperature heat medium supplied from first and second heat medium inlets (120, 220) to the tubes, supplying high-temperature inlet gas supplied from first and second inlet gas inlets (140, 240) to the cells to freeze or heat the inlet gas with the heat medium in the tubes, and having first and second process gas / condensate discharge outlets (150, 250) for discharging condensate and low-temperature process gas generated when the inlet gas is frozen together and for discharging condensate when frost is removed; First and second condensate treatment devices (50, 60) which are connected to the lower end of one side of the first and second processing gas / condensate discharge ports (150, 250) to receive the passing condensate and discharge it through the other end connected to the external line, and in which first and second condensate inflow control valves (51, 61) for turning ON / OFF the inflow of condensate are formed at the upper end and first and second condensate discharge control valves (52, 62) for turning ON / OFF the discharge of condensate are formed at the lower end;It is characterized in that it includes a freezing / restoration control device (300) that manages the type of heat medium supplied from the first and second coolers (10, 20), whether the inflow gas is supplied to the first and second heat exchangers (100, 200), whether the process gas discharged from the first and second heat exchangers (100, 200) is discharged, and whether the condensate is introduced or discharged from the first and second condensate processors (50, 60) when freezing the inflow gas or restoring the first and second heat exchangers (100, 200).

[0012] Preferably, the freezing / restoration control device (300) is characterized by including: a frost size receiving unit (310) for checking the frost size transmitted from the first and second frost detection sensors (160, 260) of the first and second heat exchangers (100, 200); a frost size checking unit (320) for checking whether the frost size received from the frost size receiving unit (310) exceeds a standard size; a heat exchanger operation information management unit (330) for performing freezing, restoration, condensate pretreatment, condensate discharge, and heat exchanger freezing processes of the first and second heat exchangers (100, 200); and a restoration time management unit (340) for registering a high-temperature heat medium supply time, a condensate pretreatment time, a condensate discharge time, and a refrigerant supply time during heat exchanger freezing during restoration of the heat exchanger.

[0013] Preferably, the heat exchanger operation information management unit (330) includes: a first inlet gas freezing / second heat exchanger restoration management unit (331) that supplies inlet gas to the first heat exchanger (100) to freeze the inlet gas and manages the frost generated in the second heat exchanger (200) to be liquefied into condensate; a first inlet gas freezing / second condensate pretreatment management unit (332) that freezes the inlet gas in the first heat exchanger (100) and manages the second condensate treatment unit (60) to be isolated from the second heat exchanger (200); a first inlet gas freezing / second condensate discharge management unit (333) that freezes the inlet gas in the first heat exchanger (100) and manages the condensate of the second condensate treatment unit (60) to be discharged; A first inlet gas freezing / second heat exchanger freezing management unit (334) that freezes the inlet gas in the first heat exchanger (100) and manages the second heat exchanger (200) to be frozen; a second inlet gas freezing / first heat exchanger restoration management unit (335) that supplies the inlet gas to the second heat exchanger (200) to be frozen and manages the frost generated in the first heat exchanger (100) to be liquefied as condensate; a second inlet gas freezing / first condensate pretreatment management unit (336) that freezes the inlet gas in the second heat exchanger (200) and manages the first condensate processor (50) to be isolated from the second heat exchanger (200); a second inlet gas freezing / first condensate discharge management unit (337) that freezes the inlet gas in the second heat exchanger (200) and manages the condensate of the first condensate processor (50) to be discharged; It is characterized by including a second inlet gas refrigeration / first heat exchanger refrigeration management unit (338) that refrigerates the inlet gas in the second heat exchanger (200) and manages the first heat exchanger (100) to be frozen.

[0014] The continuous biogas and mixed gas freezing and dehumidification system of the present invention uses a pair of heat exchangers and carries out a freezing process in which biogas or mixed gas is frozen to -20°C to -40°C in one heat exchanger, significantly removing moisture contained in the gas and, if the frost generated during the freezing process exceeds a standard in size, performing a restoration process and simultaneously carrying out a freezing process in another heat exchanger, thereby having the effect of continuously removing moisture from biogas or mixed gas.

[0015] In addition, since the recovery process is performed while freezing is performed with a different heat exchanger based on the size of the frost generated during the freezing process, there is an effect of preventing the frost from becoming thicker than the standard and reducing the heat exchange efficiency.

[0016] Figure 1 is a schematic diagram of a continuous biogas and mixed gas refrigeration and dehumidification system according to the present invention.

[0017] Figure 2 is a block diagram of a freezing / restoration control device (300) according to the present invention.

[0018] Figure 3 is a block diagram of another heat exchanger operation information management unit (330) of the present invention.

[0019] Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.

[0020] As illustrated in FIG. 1, a continuous biogas and mixed gas freezing and dehumidification system that continuously performs freezing and restoration of a heat exchanger using a temperature sensor according to an embodiment of the present invention is configured to include a first cooling and heating unit (10), a second cooling and heating unit (20), an inlet gas supply pipe (30), a treated gas discharge pipe (40), a first heat exchanger (100), a first condensate treatment unit (50), a second heat exchanger (200), a second condensate treatment unit (60), and a freezing / restoration control device (300).

[0021] The first cooling / heating device (10) selectively supplies a low-temperature heat medium or a high-temperature heat medium to the first heat exchanger (100). The low-temperature heat medium supplied from the first cooling / heating device (10) is used in a freezing process to freeze the temperature of the inlet gas such as biogas or mixed gas to -20°C to -40°C in the first heat exchanger (100), and the high-temperature heat medium is used in a restoration process to remove frost generated in the first heat exchanger (100).

[0022] The second air conditioner (20) supplies a low-temperature heat medium or a high-temperature heat medium to the second heat exchanger (200). The low-temperature heat medium supplied from the second air conditioner (20) is used in a refrigeration process to freeze the temperature of the inflow gas in the second heat exchanger (200) to -20°C to -40°C, and the high-temperature heat medium is used in a restoration process to remove frost generated in the first heat exchanger (100).

[0023] The inlet gas supply pipe (30) has one end connected to an external biogas or mixed gas discharge device (not shown) and the other end branches off and is connected to a first heat exchanger (100) and a second heat exchanger (200), and selectively supplies inlet gas to the first heat exchanger (100) and the second heat exchanger (200). A first check valve (31) and a second check valve (32) for turning the supply of inlet gas ON / OFF are formed in the branched inlet gas supply pipe (30). Through this inlet gas supply pipe (30), biogas or mixed gas containing external high-temperature and humid methane, carbon dioxide, etc. can be selectively supplied to the first heat exchanger (100) or the second heat exchanger (200).

[0024] The treatment gas discharge pipe (40) has one branched end connected to the treatment gas / condensate discharge ports of the first heat exchanger (100) and the second heat exchanger (200), and the other end connected to the outside, so that the inlet gas, from which moisture has been removed while passing through the first heat exchanger (100) and the second heat exchanger (200), is discharged as treatment gas. A third check valve (41) and a fourth check valve (42) for turning the discharge of the treatment gas ON / OFF are formed in the branched treatment gas discharge pipe (40). The inlet gas, from which moisture has been removed while being frozen to -20°C to -40°C while selectively passing through the first heat exchanger (100) or the second heat exchanger (200) through the treatment gas discharge pipe (40), is discharged as dried treatment gas.

[0025] The first heat exchanger (100) has a plurality of tubes through which a heat medium flows, and an inlet gas is introduced into the cells between the tubes to freeze or heat the heat medium within the tubes. The first heat exchanger (100) includes a first heat exchange unit (110), a first heat medium inlet (120), a first heat medium outlet (130), a first inlet gas inlet (140), a first process gas / condensate outlet (150), and a first temperature detection sensor (160).

[0026] The first heat exchange unit (110) is composed of tubes / cells, and allows a low-temperature or high-temperature heat medium supplied to the tubes through the first heat medium inlet (120) to flow, and a high-temperature inlet gas is supplied to the cells through the first inlet gas inlet (140) to perform heat exchange. Accordingly, the low-temperature heat medium passing through the tubes is used to freeze the high-temperature inlet gas into a process gas of -20°C to -40°C, and the high-temperature heat medium is used to phase-change the frost formed on the outer surface of the tubes into condensate.

[0027] The first heat medium inlet (120) is located on one side of the upper portion of the first heat exchanger (110) and is connected to the tube of the first heat exchanger (110) to provide the low-temperature heat medium or high-temperature heat medium supplied from the first air conditioner (10) to the tube.

[0028] The first heat medium discharge port (130) is located on one side of the lower portion of the first heat exchanger (110) and is connected to a tube inside the first heat exchanger (110) to provide the heat-exchanged low-temperature heat medium or high-temperature heat medium discharged from the tube to the first air conditioner (10).

[0029] The first inlet gas inlet (140) is located at the upper part of the first heat exchanger (110) and is connected to the cell to receive high-temperature inlet gas from the inlet gas supply pipe (30).

[0030] The first processing gas / condensate discharge port (150) is located at the bottom of the first heat exchanger (110) and discharges the condensate generated during the freezing process of the inlet gas and the low-temperature processing gas together, and discharges the condensate generated during the removal of frost.

[0031] The first sexual sensation detection sensor (160) is located inside the first heat exchanger (110) and checks the size of the sexual sensation generated in the tube.

[0032] This first heat exchanger (100) freezes the inflow gas moving along the cells to a temperature of -20°C to -40°C when a low-temperature heat medium is supplied from the first air conditioner (10) to the tube during freezing, and condenses moisture above the saturation humidity. Accordingly, some of the condensed moisture liquefies into condensate and falls to the bottom, and some grows as frost on the surface of the tube. In addition, when the first heat exchanger (100) restores, when a high-temperature heat medium is supplied from the first air conditioner (10) to the tube, it heats the frost formed on the outer surface of the tube, liquefies it into condensate, and falls to the bottom of the heat exchanger.

[0033] The first condensate treatment device (50) is connected to the lower end of one side of the first treatment gas / condensate discharge port (150), receives the condensate passing through the first treatment gas / condensate discharge port (150), and discharges it through the other end connected to the external line. A first condensate inlet control valve (51) that turns the inflow of condensate ON / OFF is formed at the upper end of the first condensate treatment device (50), and a first condensate discharge control valve (52) that turns the discharge of condensate ON / OFF is formed at the lower end.

[0034] The second heat exchanger (200) has a plurality of tubes through which a heat medium flows, and an inlet gas is introduced between the tubes to freeze or heat the heat medium within the tubes. The second heat exchanger (200) includes a second heat exchange unit (210), a second heat medium inlet (220), a second heat medium outlet (230), a second inlet gas inlet (240), a second process gas / condensate outlet (250), and a second temperature detection sensor (260).

[0035] The second heat exchanger (210) is composed of tubes / cells, and a low-temperature heat medium or a high-temperature heat medium is supplied to the tubes from a second heat medium inlet (220), and a high-temperature inlet gas supplied from a second inlet gas inlet (240) is allowed to flow through the cells. Accordingly, the low-temperature heat medium passing through the tubes is used to freeze the high-temperature inlet gas into a process gas of -20°C to -40°C, and the high-temperature heat medium is used to phase-change the frost formed on the outer surface of the tubes into condensate.

[0036] The second heat medium inlet (220) is located on one side of the upper portion of the second heat exchanger (210) and is connected to the tube of the second heat exchanger (210) to provide the low-temperature heat medium or the high-temperature heat medium supplied from the second air conditioner (20) to the tube.

[0037] The second heat medium discharge port (230) is located on one side of the lower portion of the second heat exchanger (210) and is connected to a tube inside the second heat exchanger (210) to provide the heat-exchanged low-temperature heat medium or high-temperature heat medium discharged from the tube to the second air conditioner (20).

[0038] The second inlet gas inlet (240) is located at the upper part of the second heat exchanger (210) and is connected to the cell to receive high-temperature inlet gas from the inlet gas supply pipe (30).

[0039] The second processing gas / condensate discharge port (250) is located at the bottom of the second heat exchanger (210) and discharges the condensate generated during freezing of the inlet gas and the low-temperature processing gas together, and discharges the condensate generated during defrostering.

[0040] The second sexual sensation detection sensor (260) is located inside the second heat exchanger (210) and checks the size of the sexual sensation generated in the tube.

[0041] This second heat exchanger (200) freezes the inflow gas moving along the cells to a temperature of -20°C to -40°C when a low-temperature heat medium is supplied to the tube from the second air conditioner (20) during freezing, and condenses moisture above the saturation humidity. Accordingly, some of the condensed moisture liquefies into condensate and falls to the bottom, and some grows as frost on the surface of the tube. In addition, when the second heat exchanger (200) restores, when a high-temperature heat medium is supplied to the tube from the second air conditioner (20), it heats the frost formed on the outer surface of the tube, liquefies it into condensate, and falls to the bottom of the heat exchanger.

[0042] The second condensate treatment device (60) is connected to the lower end of one side of the second treatment gas / condensate discharge port (250), receives the condensate passing through the second treatment gas / condensate discharge port (250), and discharges it through the other end connected to the external line. A second condensate inlet control valve (61) that turns the inflow of condensate ON / OFF is formed at the upper end of the second condensate treatment device (60), and a second condensate discharge control valve (62) that turns the discharge of condensate ON / OFF is formed at the lower end.

[0043] The freezing / restoration control device (300) manages the type of heat medium supplied from the first and second coolers (10, 20) when freezing the inflow gas in the first and second heat exchangers (100, 200) or restoring the first and second heat exchangers (100, 200), whether the mixed gas supplied to the first and second heat exchangers (100, 200) is supplied, whether the treated gas discharged from the first and second heat exchangers (100, 200) is discharged, and whether the condensate is introduced or discharged from the first and second condensate processors (50, 60). As illustrated in Fig. 2, the freezing / restoration control device (300) includes a frost size receiving unit (310), a frost size confirmation unit (320), a heat exchanger operation information management unit (330), and a restoration time management unit (340).

[0044] The sexual size receiver (310) checks the size of the sexual sensation transmitted from the first and second sexual sensation detection sensors (160, 260) located in the first and second heat exchangers (100, 200).

[0045] The sexual size confirmation unit (320) checks whether the size of the sexual object received from the sexual size reception unit (310) exceeds the standard size.

[0046] The heat exchanger operation information management unit (330) performs the freezing, restoration, condensate pretreatment, condensate discharge, and heat exchanger freezing processes of the first and second heat exchangers (100, 200). At this time, if the size of the frost generated in the first and second heat exchangers (100, 200) is greater than a standard, it is preferable that the heat exchanger operation information management unit (330) change the freezing operation to restoration operation and proceed. As illustrated in FIG. 3, the heat exchanger operation information management unit (330) includes a first inlet gas refrigeration / second heat exchanger restoration management unit (331), a first inlet gas refrigeration / second condensate pretreatment management unit (332), a first inlet gas refrigeration / second condensate discharge management unit (333), a first inlet gas refrigeration / second heat exchanger refrigeration management unit (334), a second inlet gas refrigeration / first heat exchanger restoration management unit (335), a second inlet gas refrigeration / first condensate pretreatment management unit (336), a second inlet gas refrigeration / first condensate discharge management unit (337), and a second inlet gas refrigeration / first heat exchanger refrigeration management unit (338). At this time, it is preferable that the operation time during restoration of the heat exchanger proceeds as the time set in the restoration time management unit (340).

[0047] The first inlet gas refrigeration / second heat exchanger restoration management unit (331) supplies inlet gas to the first heat exchanger (100) to freeze the inlet gas, and manages the frost generated in the second heat exchanger (200) to be liquefied into condensate. Accordingly, the first heat exchanger (100) refrigerates the introduced high-temperature inlet gas to a low temperature and discharges it as a processed gas, and the second heat exchanger (200) liquefies the frost on the tube surface and discharges it to the second condensate treatment unit (60). The first inlet gas refrigeration / second heat exchanger restoration management unit (331) manages to maintain the following states: low-temperature heat medium supply of the first air conditioner (10), high-temperature heat medium supply of the second air conditioner (20), first check valve (31) ON, second check valve (32) OFF, third check valve (41) ON, fourth check valve (42) OFF, first condensate inlet control valve (51) ON, first condensate discharge control valve (52) OFF, second condensate inlet control valve (61) ON, second condensate discharge control valve (62) OFF.

[0048] The first inlet gas refrigeration / second condensate pretreatment management unit (332) freezes the inlet gas in the first heat exchanger (100) and manages the second condensate treatment unit (60) to be isolated from the second heat exchanger (200). Accordingly, the first heat exchanger (100) maintains the process of freezing the high-temperature inlet gas to a low temperature and discharging it as a treated gas, and the second heat exchanger (200) and the condensate treatment unit are separated so that the treated gas remaining inside the second heat exchanger (200) is maintained as is. The first inlet gas refrigeration / second condensate pretreatment management unit (332) manages to maintain the following states: low-temperature heat medium supply of the first air conditioner (10), second air conditioner (20) OFF, first check valve (31) ON, second check valve (32) OFF, third check valve (41) ON, fourth check valve (42) OFF, first condensate inlet control valve (51) ON, first condensate discharge control valve (52) OFF, second condensate inlet control valve (61) OFF, and second condensate discharge control valve (62) OFF.

[0049] The first inlet gas refrigeration / second condensate discharge management unit (333) freezes the inlet gas in the first heat exchanger (100) and manages the discharge of the condensate from the second condensate treatment unit (60). Accordingly, the first heat exchanger (100) maintains the process of freezing the high-temperature inlet gas to a low temperature and discharging it as treated gas, and discharges the condensate stored in the second condensate treatment unit (60) to the outside. The first inlet gas refrigeration / second condensate discharge management unit (333) maintains the following states: supply of low-temperature heat medium of the first air conditioner (10), OFF of the second air conditioner (20), ON of the first check valve (31), OFF of the second check valve (32), OFF of the third check valve (41), ON of the fourth check valve (42), ON of the first condensate inlet control valve (51), ON of the first condensate discharge control valve (52), OFF of the second condensate inlet control valve (61), and ON of the second condensate discharge control valve (62).

[0050] The first inlet gas refrigeration / second heat exchanger refrigeration management unit (334) refrigerates the inlet gas in the first heat exchanger (100) and manages the second heat exchanger (200) to be frozen. Accordingly, the first heat exchanger (100) maintains the process of freezing the high-temperature inlet gas to a low temperature and discharging it as a processed gas, and freezes the processed gas remaining in the second heat exchanger (200). The first inlet gas refrigeration / second heat exchanger refrigeration management unit (334) maintains the low-temperature heat medium supply of the first air conditioner (10), the low-temperature heat medium supply of the second air conditioner (20), the first check valve (31) ON, the second check valve (32) OFF, the third check valve (41) ON, the fourth check valve (42) OFF, the first condensate inlet control valve (51) ON, the first condensate discharge control valve (52) OFF, the second condensate inlet control valve (61) OFF, and the second condensate discharge control valve (62) OFF states.

[0051] The second inlet gas refrigeration / first heat exchanger restoration management unit (335) supplies the inlet gas to the second heat exchanger (200) to freeze it, and manages the frost generated in the first heat exchanger (100) to be liquefied into condensate. Accordingly, the second heat exchanger (200) refrigerates the introduced high-temperature inlet gas to a low temperature and discharges it as a processed gas, and the second heat exchanger (200) liquefies the frost on the tube surface and discharges it to the second condensate treatment unit (60). The second inlet gas refrigeration / first heat exchanger restoration management unit (335) manages to maintain the following states: low-temperature heat medium supply of the second air conditioner (20), high-temperature heat medium supply of the first air conditioner (10), first check valve (31) OFF, second check valve (32) ON, third check valve (41) OFF, fourth check valve (42) ON, first condensate inlet control valve (51) ON, first condensate discharge control valve (52) OFF, second condensate inlet control valve (61) ON, and second condensate discharge control valve (62) OFF.

[0052] The second inlet gas refrigeration / first condensate pretreatment management unit (336) freezes the inlet gas in the second heat exchanger (200) and manages the first condensate treatment unit (50) to be isolated from the second heat exchanger (200). Accordingly, the second heat exchanger (200) maintains the process of freezing the high-temperature inlet gas to a low temperature and discharging it as a treated gas, and the first heat exchanger (100) and the condensate treatment unit are separated so that the treated gas remaining inside the first heat exchanger (100) is maintained as is. The second inflow gas refrigeration / first condensate pretreatment management unit (336) manages the state of maintaining the low-temperature heat medium supply of the second air conditioner (20), the first air conditioner (10) OFF, the first check valve (31) OFF, the second check valve (32) ON, the third check valve (41) OFF, the fourth check valve (42) ON, the first condensate inflow control valve (51) OFF, the first condensate discharge control valve (52) OFF, the second condensate inflow control valve (61) ON, and the second condensate discharge control valve (62) OFF.

[0053] The second inlet gas refrigeration / first condensate discharge management unit (337) freezes the inlet gas in the second heat exchanger (200) and manages the discharge of the condensate from the first condensate treatment unit (50). Accordingly, the second heat exchanger (200) maintains the process of freezing the high-temperature inlet gas to a low temperature and discharging it as treated gas, and discharges the condensate stored in the first condensate treatment unit (50) to the outside. The second inlet gas refrigeration / first condensate discharge management unit (337) maintains the low-temperature heat medium supply of the second air conditioner (20), the first air conditioner (10) OFF, the first check valve (31) OFF, the second check valve (32) ON, the third check valve (41) OFF, the fourth check valve (42) ON, the first condensate inlet control valve (51) OFF, the first condensate discharge control valve (52) ON, the second condensate inlet control valve (61) ON, and the second condensate discharge control valve (62) OFF states.

[0054] The second inlet gas refrigeration / first heat exchanger refrigeration management unit (338) refrigerates the inlet gas in the second heat exchanger (200) and manages the first heat exchanger (100) to be frozen. Accordingly, the second heat exchanger (200) maintains the process of freezing the high-temperature inlet gas to a low temperature and discharging it as a process gas, and freezes the process gas remaining in the first heat exchanger (100). The second inlet gas refrigeration / first heat exchanger refrigeration management unit (338) maintains the low-temperature heat medium supply of the second air conditioner (20), the low-temperature heat medium supply of the first air conditioner (10), the first check valve (31) OFF, the second check valve (32) ON, the third check valve (41) OFF, the fourth check valve (42) ON, the first condensate inlet control valve (51) OFF, the first condensate discharge control valve (52) OFF, the second condensate inlet control valve (61) ON, and the second condensate discharge control valve (62) OFF states.

[0055] The restoration time management unit (340) registers the high-temperature heat medium supply time, condensate pretreatment time, condensate discharge time, and refrigerant supply time during heat exchanger freezing when restoring the heat exchanger.

[0056] As described above, although the present invention has been described by limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical idea of ​​the present invention and the equivalent scope of the claims to be described below by a person having ordinary skill in the art to which the present invention pertains.

Claims

1. The first and second cooling and heating units (10, 20) supplying low-temperature heat medium or high-temperature heat medium to the first and second heat exchangers (100, 200), respectively; An inlet gas supply pipe (30) which is connected to the outside at one end and branches off at the other end to selectively supply external biogas or mixed gas as inlet gas to the first and second heat exchangers (100, 200); A process gas discharge pipe (40) having one end connected to the process gas / condensate discharge port (150, 250) of the first and second heat exchangers (100, 200) and the other end connected to the outside to selectively discharge the inlet gas from which moisture has been removed as process gas while passing through the first heat exchanger (100) and the second heat exchanger (200); First and second heat exchangers (100, 200) having tubes / cells and supplying low-temperature or high-temperature heat medium supplied from first and second heat medium inlets (120, 220) to the tubes, supplying high-temperature inlet gas supplied from first and second inlet gas inlets (140, 240) to the cells to freeze or heat the inlet gas with the heat medium in the tubes, and having first and second process gas / condensate discharge outlets (150, 250) for discharging condensate and low-temperature process gas generated when the inlet gas is frozen together and for discharging condensate when frost is removed; First and second condensate treatment devices (50, 60) which are connected to the lower end of one side of the first and second processing gas / condensate discharge ports (150, 250) to receive the passing condensate and discharge it through the other end connected to the external line, and in which first and second condensate inflow control valves (51, 61) for turning ON / OFF the inflow of condensate are formed at the upper end and first and second condensate discharge control valves (52, 62) for turning ON / OFF the discharge of condensate are formed at the lower end; A continuous biogas and mixed gas freezing and dehumidification system characterized by including a freezing / restoration control device (300) that manages the type of heat medium supplied from the first and second coolers (10, 20), whether the inflow gas is supplied to the first and second heat exchangers (100, 200), whether the treated gas is discharged from the first and second heat exchangers (100, 200), and whether the condensate is introduced or discharged from the first and second condensate processors (50, 60) when freezing the inflow gas or restoring the first and second heat exchangers (100, 200).

2. A continuous biogas and mixed gas refrigeration and dehumidification system characterized in that, in claim 1, a first check valve (31) and a second check valve (32) for turning ON / OFF the supply of the inflow gas are formed in the branched inflow gas supply pipe (30), and a third check valve (41) and a fourth check valve (42) for turning ON / OFF the discharge of the process gas are formed in the branched processed gas discharge pipe (40).

3. In claim 1, the first heat exchanger (100) A first heat exchange unit (110) composed of tubes / cells, which receives a low-temperature heat medium or a high-temperature heat medium through the tubes and receives a high-temperature inlet gas through the first inlet gas inlet port (140) through the cells to exchange heat; A first heat medium inlet (120) located on one side of the upper portion of the first heat exchanger (110) and connected to the tube of the first heat exchanger (110) to receive a low-temperature heat medium or a high-temperature heat medium from the first air conditioner (10); A first heat medium discharge port (130) located on one side of the lower portion of the first heat exchanger (110) and connected to a tube inside the first heat exchanger (110) to discharge the heat-exchanged low-temperature heat medium or high-temperature heat medium discharged from the tube to the first air conditioner (10); A first inlet gas inlet (140) located at the upper part of the first heat exchanger (110) and connected to the cell to receive high-temperature inlet gas from the inlet gas supply pipe (30); A first processing gas / condensate discharge port (150) located at the bottom of the first heat exchanger (110) and discharging the condensate generated when the inlet gas is frozen and the low-temperature processing gas and condensate together, and discharging the condensate when the frost is removed; It includes a first sexual detection sensor (160) located inside the first heat exchanger (110) and checking the size of the sexual sensation generated in the tube, The second heat exchanger (210) A second heat exchange unit (210) composed of tubes / cells, which receives a low-temperature heat medium or a high-temperature heat medium through the tubes and receives a high-temperature inlet gas through a second inlet gas inlet (240) through the cells to exchange heat; A second heat medium inlet (220) located on one side of the upper portion of the second heat exchanger (210) and connected to the tube of the second heat exchanger (210) to receive a low-temperature heat medium or a high-temperature heat medium from the second air conditioner (20); A second heat medium discharge port (230) located on one side of the lower end of the second heat exchanger (210) and connected to a tube inside the second heat exchanger (210) to discharge the heat-exchanged low-temperature heat medium or high-temperature heat medium discharged from the tube to the second air conditioner (20); A second inlet gas inlet (240) located at the upper part of the second heat exchanger (210) and connected to the cell to receive high-temperature inlet gas from the inlet gas supply pipe (30); A second processing gas / condensate discharge port (250) located at the bottom of the second heat exchanger (210) and discharging the condensate generated when the inlet gas is frozen and the low-temperature processing gas and condensate together, and discharging the condensate when the frost is removed; A continuous biogas and mixed gas refrigeration and dehumidification system characterized by including a second condensation detection sensor (260) located inside a second heat exchanger (210) and configured to check the size of the condensation generated in the tube.

4. In claim 1 or claim 3, the freezing / restoration control device (300) A sexual size receiving unit (310) that checks the size of sexual sensation transmitted from the first and second sexual sensation detection sensors (160, 260) of the first and second heat exchangers (100, 200); A sexual size confirmation unit (320) that confirms whether the size of the sexual information received from the sexual size reception unit (310) exceeds the standard size; A heat exchanger operation information management unit (330) that performs the freezing, restoration, condensate pretreatment, condensate discharge, and heat exchanger freezing processes of the first and second heat exchangers (100, 200); A continuous biogas and mixed gas refrigeration and dehumidification system characterized by including a restoration time management unit (340) that registers the high-temperature heat medium supply time, condensate pretreatment time, condensate discharge time, and refrigerant supply time during heat exchanger freezing when restoring a heat exchanger.

5. A continuous biogas and mixed gas freezing and dehumidification system characterized in that, in claim 1, the heat exchanger operation information management unit (330) changes the freezing operation to restoration operation when the size of the slurry generated in the first and second heat exchangers (100, 200) is greater than a standard.

6. In claim 4, the heat exchanger operation information management unit (330) A first inlet gas freezing / second heat exchanger restoration management unit (331) that supplies inlet gas to the first heat exchanger (100) to freeze the inlet gas and manages the condensate generated in the second heat exchanger (200) to be liquefied into condensate; A first inlet gas freezing / second condensate pretreatment management unit (332) that freezes the inlet gas in the first heat exchanger (100) and manages the second condensate treatment unit (60) to be isolated from the second heat exchanger (200); A first inlet gas freezing / second condensate discharge management unit (333) that freezes the inlet gas in the first heat exchanger (100) and manages the discharge of condensate from the second condensate treatment unit (60); A first inlet gas refrigeration / second heat exchanger refrigeration management unit (334) that refrigerates the inlet gas in the first heat exchanger (100) and manages the second heat exchanger (200) to be frozen; A second inlet gas refrigeration / first heat exchanger restoration management unit (335) that supplies inlet gas to the second heat exchanger (200) to refrigerate it and manages the condensate generated in the first heat exchanger (100) to be liquefied into condensate; A second inlet gas freezing / first condensate pretreatment management unit (336) that freezes the inlet gas in the second heat exchanger (200) and manages the first condensate treatment unit (50) to be isolated from the second heat exchanger (200); A second inlet gas freezing / first condensate discharge management unit (337) that freezes the inlet gas in the second heat exchanger (200) and manages the discharge of the condensate from the first condensate treatment unit (50); A continuous inflow gas and mixed gas freezing and dehumidification system characterized by including a second inflow gas freezing / first heat exchanger freezing management unit (338) that freezes inflow gas in a second heat exchanger (200) and manages the first heat exchanger (100) to be frozen.

7. In claim 6, the first inlet gas refrigeration / second heat exchanger restoration management unit (331) maintains the low-temperature heat medium supply of the first air conditioner (10), the high-temperature heat medium supply of the second air conditioner (20), the first check valve (31) ON, the second check valve (32) OFF, the third check valve (41) ON, the fourth check valve (42) OFF, the first condensate inlet control valve (51) ON, the first condensate discharge control valve (52) OFF, the second condensate inlet control valve (61) ON, and the second condensate discharge control valve (62) OFF. The first inlet gas refrigeration / second condensate pretreatment management unit (332) maintains the low-temperature heat medium supply of the first air conditioner (10), the second air conditioner (20) OFF, the first check valve (31) ON, the second check valve (32) OFF, the third check valve (41) ON, the fourth check valve (42) OFF, the first condensate inlet control valve (51) ON, the first condensate discharge control valve (52) OFF, the second condensate inlet control valve (61) OFF, and the second condensate discharge control valve (62) OFF. The first inlet gas refrigeration / second condensate discharge management unit (333) maintains the low-temperature heat medium supply of the first air conditioner (10), the second air conditioner (20) OFF, the first check valve (31) ON, the second check valve (32) OFF, the third check valve (41) ON, the fourth check valve (42) OFF, the first condensate inlet control valve (51) ON, the first condensate discharge control valve (52) OFF, the second condensate inlet control valve (61) OFF, and the second condensate discharge control valve (62) ON. The first inlet gas refrigeration / second heat exchanger refrigeration management unit (334) maintains the low-temperature heat medium supply of the first air conditioner (10), the low-temperature heat medium supply of the second air conditioner (20), the first check valve (31) ON, the second check valve (32) OFF, the third check valve (41) ON, the fourth check valve (42) OFF, the first condensate inlet control valve (51) ON, the first condensate discharge control valve (52) OFF, the second condensate inlet control valve (61) OFF, and the second condensate discharge control valve (62) OFF. The second inlet gas refrigeration / first heat exchanger restoration management unit (335) maintains the low-temperature heat medium supply of the second air conditioner (20), the high-temperature heat medium supply of the first air conditioner (10), the first check valve (31) OFF, the second check valve (32) ON, the third check valve (41) OFF, the fourth check valve (42) ON, the first condensate inlet control valve (51) ON, the first condensate discharge control valve (52) OFF, the second condensate inlet control valve (61) ON, and the second condensate discharge control valve (62) OFF. The second inlet gas refrigeration / first condensate pretreatment management unit (336) maintains the low-temperature heat medium supply of the second air conditioner (20), the first air conditioner (10) OFF, the first check valve (31) OFF, the second check valve (32) ON, the third check valve (41) OFF, the fourth check valve (42) ON, the first condensate inlet control valve (51) OFF, the first condensate discharge control valve (52) OFF, the second condensate inlet control valve (61) ON, and the second condensate discharge control valve (62) OFF. The second inlet gas refrigeration / first condensate discharge management unit (337) maintains the low-temperature heat medium supply of the second air conditioner (20), the first air conditioner (10) OFF, the first check valve (31) OFF, the second check valve (32) ON, the third check valve (41) OFF, the fourth check valve (42) ON, the first condensate inlet control valve (51) OFF, the first condensate discharge control valve (52) ON, the second condensate inlet control valve (61) ON, and the second condensate discharge control valve (62) OFF. The second inlet gas refrigeration / first heat exchanger refrigeration management unit (338) is characterized by maintaining the low-temperature heat medium supply of the second air conditioner (20), the low-temperature heat medium supply of the first air conditioner (10), the first check valve (31) OFF, the second check valve (32) ON, the third check valve (41) OFF, the fourth check valve (42) ON, the first condensate inlet control valve (51) OFF, the first condensate discharge control valve (52) OFF, the second condensate inlet control valve (61) ON, and the second condensate discharge control valve (62) OFF states.

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