Distributed condensation system

Abstract

The utility model belongs to the technical field of waste gas condensation, and particularly relates to a distributed condensation system which comprises a gas supply unit, a cooling unit, a heating unit, a reflux unit and a nitrogen supply unit, the gas supply unit is used for providing waste gas; the cooling unit is used for cooling and condensing the waste gas provided by the gas supply unit; the heating unit is used for heating the non-condensable gas discharged by the cooling unit; the reflux unit is used for collecting condensate in the cooling unit; the nitrogen supply unit is used for absorbing cold energy of the heating unit through nitrogen provided by the nitrogen supply unit when the heating unit is used for heating, and is used for absorbing heat of the cooling unit through liquid nitrogen provided by the nitrogen supply unit when the cooling unit is used for cooling; the air supply unit comprises a storage kettle and a breather valve, and the breather valve is arranged at the output end of the storage kettle; through cooperation of the structure, targeted treatment of different components in waste gas is achieved, the treatment risk is reduced, meanwhile, non-condensable gas in the condensation cavity can be directly treated, and the risk of liquid accumulation is prevented.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas condensation technology, specifically a distributed condensation system. Background Technology

[0002] Among the process methods for purifying process exhaust gases, including those from storage tanks, chemical reactors, and distillation towers, liquid nitrogen condensation is a common treatment method. The typical emission characteristics of this type of waste gas are: high concentration, small volume, and large fluctuations.

[0003] Conventional liquid nitrogen condensation processes employ centralized treatment. This involves collecting exhaust gases from various chemical and oil storage tanks, reaction vessels, or distillation column tail gases, and then centrally condensing and purifying them using a liquid nitrogen condensation unit. The VOCs solvent mixture condensed and precipitated is then treated in the following ways: 1. Outsourced hazardous waste disposal; 2. Incineration on-site; 3. Recycling and reuse through processes such as distillation and extraction.

[0004] The above-mentioned common treatment methods have various constraints, such as high outsourcing costs, management and safety risks associated with waste liquid incineration, or high recycling costs.

[0005] Because exhaust gases from each emission point need to be collected and aggregated, there is a risk of backflow and cross-contamination at the collection points, such as storage tanks and reactors. At the same time, the VOCs at the emission points also need to consider chemical safety compatibility, which places higher management requirements on the production and operation management of chemical storage tanks. It is necessary to ensure reliable chemical safety compatibility analysis and management. If the composition of exhaust gases from storage tanks and reactors changes, there are significant safety risks. This places higher demands on the management of changes in the types of substances stored in storage tanks and the uses of reactors, and reduces the flexibility of the configuration management of storage tanks and reactors.

[0006] In addition to the above, the method of collecting and centrally condensing and purifying VOCs through pipelines also requires the configuration of exhaust gas transmission pipelines. Besides increasing the cost of pipeline construction and management, the long-distance transmission of high-concentration VOCs exhaust gas may lead to liquid accumulation or polymerization of VOCs in the pipelines, posing certain safety risks.

[0007] Therefore, this utility model provides a distributed condensation system. Utility Model Content

[0008] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0009] The technical solution adopted by this utility model to solve its technical problem is: a distributed condensation system of this utility model, including a gas supply unit, a cooling unit, a heating unit, a reflux unit and a nitrogen supply unit;

[0010] The gas supply unit is used to supply exhaust gas;

[0011] The cooling unit is used to cool and condense the exhaust gas supplied by the gas supply unit.

[0012] The heating unit is used to heat the non-condensable gas discharged from the cooling unit;

[0013] The reflux unit is used to collect the condensate from the cooling unit.

[0014] The nitrogen supply unit absorbs the cooling energy of the heating unit by supplying nitrogen gas during the heating phase and absorbs the heat of the cooling unit by supplying liquid nitrogen during the cooling phase.

[0015] Preferably, the gas supply unit includes a storage vessel and a breather valve, with the breather valve located at the output end of the storage vessel;

[0016] The cooling unit includes a cooling heat exchanger and a ninth pipe. The cooling heat exchanger is connected to the breather valve through the ninth pipe.

[0017] The heating unit includes a heating heat exchanger and a seventh pipe. Non-condensable gases in the heating heat exchanger are discharged through the seventh pipe.

[0018] The reflux mechanism includes a first storage tank and a first level gauge. The first level gauge detects the liquid level in the inner cavity of the first storage tank. The first storage tank is connected to the condensate discharge end of the cooling heat exchanger through a first pipe.

[0019] The nitrogen supply unit includes a liquid nitrogen storage tank, a vaporizer, and a second storage tank. The liquid nitrogen output from the liquid nitrogen storage tank is vaporized by the vaporizer and discharged to the hot end of the heating heat exchanger. The second storage tank is used to store the nitrogen discharged from the heating heat exchanger, and the liquid nitrogen and nitrogen gas in the second storage tank are mixed and then supplied to the cooling heat exchanger.

[0020] Preferably, the cooling heat exchanger includes a housing shell, an exhaust gas inlet pipe, a condenser plate, and a refrigerant pipe;

[0021] The exhaust gas inlet pipe is fixedly installed at one end of the housing and connected to the ninth pipe;

[0022] The condenser plate is fixedly installed on the inner wall of the housing, and the refrigerant pipes are installed on the inner wall of the condenser plate, with both ends extending to the outer wall of the condenser plate.

[0023] Preferably, a filter plate is fixedly installed on the side of the housing near the exhaust gas inlet pipe, and a collection box is fixedly installed on the outer wall of the housing. The inner cavity of the collection box is connected to the inner cavity of the housing, and the collection box is located directly below the filter plate.

[0024] An installation box is fixedly installed on the outer wall of the housing. There are two installation boxes, which are symmetrically arranged on the outer wall of the housing.

[0025] The inner walls of the mounting boxes are inclined, and the inclined surfaces inside the two mounting boxes are in opposite positions.

[0026] A control motor is fixedly installed on the outer wall of the mounting box, and the output shaft of the control motor extends to the inner wall of the mounting box, where control fan blades are fixedly installed.

[0027] Preferably, a transmission rod is slidably installed on the outer wall of the housing, one end of the transmission rod extends to the inner wall of the housing and is fixedly installed with a cleaning scraper, the outer wall of the cleaning scraper slidingly fitting against the outer wall of the condensation plate;

[0028] The cleaning scraper has an inclined sidewall.

[0029] Preferably, a control cylinder is provided on one side of the housing, a control plug is slidably installed on the inner wall of the control cylinder, a control shaft is fixedly installed on one side of the control plug, and the end of the control shaft away from the control plug is elastically connected to the outer wall of the transmission rod.

[0030] The outer wall of the control cylinder is provided with a delivery pipe, which is spirally distributed on the outer wall of the control cylinder, and one end of the delivery pipe is connected to the input end of the refrigeration pipe.

[0031] Preferably, a mounting plate is fixedly installed on the outer wall of the housing, and a limit wedge is fixedly installed on the outer wall of the mounting plate;

[0032] The outer wall of the transmission rod is elastically fitted with a locking plate for engaging with the limiting inclined block via a torsion spring;

[0033] A top-pressing wedge is fixedly installed at the axial end of the control shaft. The bottom surface of the top-pressing wedge slides against the outer wall of the transmission rod and is used to press down the end of the locking plate away from the limit wedge.

[0034] Preferably, a transmission sleeve is rotatably installed on the inner wall of the housing, the transmission sleeve passes through the filter plate, and a cleaning plate is fixedly installed thereon, the outer wall of the cleaning plate being in contact with the side of the filter plate near the exhaust gas inlet pipe.

[0035] Preferably, a housing cylinder is fixedly installed on the inner wall of the housing, a transmission plug is slidably installed on the inner wall of the housing cylinder, and a transmission shaft is rotatably installed on one side of the transmission plug.

[0036] A transmission frame is fixedly installed on the inner wall of the container, and the transmission shaft passes through the transmission frame;

[0037] The radial outer wall of the drive shaft is provided with an annular groove, which is inclined, and the drive frame is provided with a spherical protrusion that slides in conjunction with the annular groove.

[0038] The end of the drive shaft away from the drive plug is fixedly equipped with a connector rod that slides into the drive sleeve.

[0039] 1. This utility model uses a cooling unit to cool and condense the waste gas supplied by the gas supply unit, and a heating unit to heat the non-condensable gas discharged from the cooling unit. When the heating unit heats up, nitrogen supplied by the nitrogen supply unit absorbs the cooling energy of the heating unit. When the cooling unit cools down, liquid nitrogen supplied by the nitrogen supply unit absorbs the heat of the cooling unit. The first storage tank is connected to the condensate discharge end of the cooling heat exchanger through the ninth pipe. The non-condensable gas is heated in the heating heat exchanger to recover the cooling energy it carries, and then discharged cleanly to the atmosphere through the seventh pipe. This achieves targeted treatment of different components in the waste gas, reduces treatment risks, and at the same time, it can directly treat the non-condensable gas in the condensation chamber to prevent the risk of liquid accumulation.

[0040] 2. This utility model uses point-to-point condensation treatment, eliminating the possibility of mixed pollution in the condensate. The condensate can be directly recycled and reused. In addition to eliminating the cost of outsourcing waste disposal, it can also generate economic benefits from recycling. At the same time, for the treatment of tank exhaust gas, a centralized condensation system is adopted. Since the exhaust gas from multiple tanks is combined, the uncertainty of the exhaust gas emissions from the tanks means that the liquid nitrogen condensation system needs to be designed with one in use and one on standby. The point-to-point distributed treatment method allows the condensation system to use fixed intermittent exhaust for defrosting without the need for a standby system, thus reducing system investment.

[0041] 3. In this utility model, the distributed liquid nitrogen design adopts atmospheric pressure evaporation, which results in a lower evaporation temperature compared to pressurized evaporation. This feature provides a larger heat exchanger temperature difference for the system, reducing heat exchanger costs. On the other hand, the lower condensation temperature provides a lower saturated vapor concentration in the VOCs exhaust gas, which is more conducive to achieving emission standards. For example, butadiene, tetrafluoroethylene, chloromethane, and most refrigerants can achieve direct emission standards without further deep treatment. Since it is a point-to-point treatment method, there is no need to collect exhaust gas pipelines. When changing or adjusting products in production equipment such as storage tanks and reaction vessels, there is no need to consider chemical safety compatibility issues, which facilitates enterprise management and operation.

[0042] 4. This utility model, by setting up a transmission rod and a cleaning scraper, allows the cleaning scraper to slide after condensation, scraping away the liquid on the outer wall of the condenser plate. This facilitates the recovery of condensate and prevents the condensate from adhering to the outer wall of the condenser plate and forming a sticky film after drying, which would affect subsequent cold chain operations. Simultaneously, a control cylinder and a control plug are set up. The temperature difference in the pipes before and after condensation is adjusted to slide the control plug, which in turn drives the transmission rod to slide via the control shaft, thereby scraping away the outer wall of the condenser plate. This enables the reuse of waste resources and further improves energy utilization efficiency. Attached Figure Description

[0043] The present invention will be further described below with reference to the accompanying drawings.

[0044] Figure 1 This is a component distribution diagram when the storage vessel in this utility model is a chemical storage tank;

[0045] Figure 2 This is a component distribution diagram when the storage vessel in this utility model is a tail gas reaction vessel;

[0046] Figure 3 This is a component distribution diagram when the condensate needs to be recovered independently in this utility model;

[0047] Figure 4 This is a schematic diagram of the overall structure of the cooling condenser in this utility model;

[0048] Figure 5 This is a schematic diagram of the installation of the condenser plate in this utility model;

[0049] Figure 6 This is a schematic diagram of the internal structure of the mounting box in this utility model;

[0050] Figure 7 This is a schematic diagram of the structure of the refrigeration pipe in this utility model;

[0051] Figure 8 This is a schematic diagram of the cleaning scraper in this utility model;

[0052] Figure 9 yes Figure 8 Enlarged view of a portion of point A in the middle;

[0053] Figure 10 This is a schematic diagram of the installation of the accommodating cylinder in this utility model;

[0054] Figure 11 This is a schematic diagram of the transmission shaft in this utility model;

[0055] Figure 12 This is a flowchart of the distributed condensation process in this utility model.

[0056] In the diagram: 1. Cooling heat exchanger; 001. Housing shell; 002. Collection box; 003. Exhaust gas inlet pipe; 004. Mounting box; 005. Control motor; 006. Refrigeration pipe; 007. Control cylinder; 008. Conveying pipe; 009. Mounting plate; 010. Condensing plate; 011. Cleaning scraper; 012. Control fan blade; 013. Housing cylinder; 014. Transmission sleeve; 015. Filter plate; 016. Control plug; 017. Control shaft; 018. Transmission rod; 019. Top pressure inclined block; 020. Locking plate; 021. Limiting inclined block; 022. Cleaning plate; 023. Connecting rod; 024. Annular groove; 025. Transmission plug; 026. Transmission shaft; 027. Transmission frame;

[0057] 2. Heating heat exchanger; 21. Second liquid level; 22. First liquid level gauge; 23. Flow meter; 24. Second temperature sensor; 25. First temperature sensor; 3. Second storage tank; 303. Third pipeline; 304. Fourth pipeline; 305. Fifth pipeline; 306. Sixth pipeline; 307. Ninth pipeline; 308. Second pipeline; 309. Seventh pipeline; 310. First pipeline; 312. Eighth pipeline; 4. Vaporizer; 5. Liquid nitrogen storage tank; 6. First storage tank; 7. Control pump; 8. Storage vessel; 11. Second valve; 12. Third valve; 13. First valve; 14. Breathing valve. Detailed Implementation

[0058] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0059] like Figure 1 As shown in the embodiment of this utility model, a distributed condensation system includes a gas supply unit, a cooling unit, a heating unit, a reflux unit, and a nitrogen supply unit.

[0060] The gas supply unit is used to supply exhaust gas. The gas supply unit includes a storage vessel 8 and a breather valve 14, which is located at the output end of the storage vessel 8.

[0061] The cooling unit is used to cool and condense the exhaust gas supplied by the gas supply unit. The cooling unit includes a cooling heat exchanger 1 and a ninth pipe 307. The cooling heat exchanger 1 is connected to the breather valve 14 through the ninth pipe 307.

[0062] The heating unit is used to heat the non-condensable gas discharged from the cooling unit. The heating unit includes a heating heat exchanger 2 and a seventh pipe 309. The non-condensable gas in the heating heat exchanger 2 is discharged through the seventh pipe 309.

[0063] The reflux unit is used to collect the condensate in the cooling unit. The reflux mechanism includes a first storage tank 6 and a first level gauge 22. The first level gauge 22 detects the liquid level in the cavity of the first storage tank 6. The first storage tank 6 is connected to the condensate discharge end of the cooling heat exchanger 1 through a first pipe 310.

[0064] The nitrogen supply unit absorbs the cooling energy of the heating unit by supplying nitrogen gas during the heating phase and absorbs the heat of the cooling unit by supplying liquid nitrogen during the cooling phase. The nitrogen supply unit includes a liquid nitrogen storage tank 5, a vaporizer 4, and a second storage tank 3. The liquid nitrogen output from the liquid nitrogen storage tank 5 is vaporized by the vaporizer 4 and discharged to the hot end of the heating heat exchanger 2. The second storage tank 3 is used to store the nitrogen gas discharged from the heating heat exchanger 2, and the liquid nitrogen and nitrogen gas mixed in the second storage tank 3 are then supplied to the cooling heat exchanger 1.

[0065] When the storage vessel 8 is a chemical storage tank, the exhaust gas discharged from the breather valve 14 of the storage vessel 8, including the VOCs exhaust gas, enters the cooling heat exchanger 1 to be cooled, and the VOCs components are condensed and precipitated. The exhaust gas is then discharged from the first pipeline 310 to the first storage tank 6. The first storage tank 6 is equipped with a first level gauge 22. If the liquid level reaches a certain height, the first valve 13 is opened, and the pump 7 is started to run. The condensate temporarily stored in the storage tank is then pumped to the storage vessel 8 for recovery.

[0066] The VOCs solvent discharged with the gas is 100% recycled and reused. The system has no waste liquid discharge. The cooled low-temperature non-condensable gas is transported to the heating heat exchanger 2 through the second pipe 308. A first temperature sensor 25 is installed on the second pipe 308. The non-condensable gas is heated in the heating heat exchanger 2 to recover the cold energy it carries. Then it is discharged cleanly into the atmosphere through the seventh pipe 309.

[0067] The liquid nitrogen supplied by the liquid nitrogen storage tank 5 is vaporized into nitrogen gas in the vaporizer 4. The ambient temperature nitrogen gas enters the hot side of the heating heat exchanger 2 through the third pipe 303 and the third valve 12 to recover the cooling capacity of the non-condensable vapor. Since the nitrogen gas in the above process comes from the evaporation of liquid nitrogen, a certain amount of liquid nitrogen needs to be consumed (this nitrogen gas source can also be nitrogen gas from the nitrogen pipeline network, without consuming liquid nitrogen). When the nitrogen gas in the nitrogen pipeline network comes from pipeline nitrogen or PSA gas production, since the cost of nitrogen gas produced by liquid nitrogen is higher than that of pipeline nitrogen and PSA nitrogen production, considerable liquid nitrogen consumption and operating costs can be saved.

[0068] Nitrogen gas, which has been initially cooled on the hot side of the heating heat exchanger 2, enters the second storage tank 3 through the fourth pipe 304. In the second storage tank 3, the nitrogen gas mixes with the liquid nitrogen in the second storage tank 3 and exchanges heat to cool down. At the same time, some of the liquid nitrogen in the storage tank is vaporized into low-temperature nitrogen gas. The second storage tank 3 is equipped with a second liquid level gauge 21, which is used to monitor the liquid nitrogen level in the second storage tank 3. When the liquid nitrogen level drops, the second valve 11 opens to replenish the second storage tank 3 with liquid nitrogen.

[0069] The cooled low-temperature nitrogen gas in the second storage tank 3, as well as the vaporized low-temperature nitrogen gas (through the fifth pipe 305), are discharged from the second storage tank 3 and enter the cooling heat exchanger 1 to provide a cold source for the condensation of VOCs.

[0070] After being heated in the cooling heat exchanger 1, the low-temperature nitrogen gas is discharged from the system through the sixth pipe 306. The sixth pipe 306 is designed with a second temperature sensor 24 and a flow meter 23. The second temperature sensor 24 is used to limit the opening of the third valve 12 to prevent excessive nitrogen supply.

[0071] When the second temperature sensor 24 detects that the temperature is too low, typically below 0°C or below the process gas inlet temperature of -40°C, the opening of the third valve 12 is limited to a certain degree. The first temperature sensor 25 is used to monitor the temperature of the condensed exhaust gas.

[0072] The temperature needs to be adjusted according to different VOCs components to ensure that the corresponding saturated vapor concentration is lower than the allowable concentration for compliant emissions. The value detected by the second temperature sensor 24 is compared with the gas control setpoint. If the detected value is higher than the setpoint, the third valve 12 reduces the valve opening according to the PID parameters to reduce the supply of nitrogen. If the detected value is lower than the setpoint, the control is reversed.

[0073] The nitrogen discharged from the sixth pipe 306 is either directly vented to the outside or pressurized by a fan or compressor and then recycled.

[0074] Since nitrogen exhaust gas is discharged at atmospheric pressure, the evaporation of nitrogen in the second storage tank 3 is atmospheric pressure evaporation. The low-temperature nitrogen discharged from the second storage tank 3 is -196°C. This temperature, compared to conventional pressurized evaporation, provides a larger heat exchange temperature difference for the condensation system and a lower condensation temperature. Correspondingly, the exhaust concentration of VOCs can reach a lower level. This characteristic allows for direct condensation to meet emission standards when dealing with VOC components with very high saturated vapor concentrations, without the need for further deep treatment. Typical components in this category include butadiene, tetrafluoroethylene, chloromethane, and refrigerants.

[0075] Besides being used for treating exhaust gases from storage vessels, another very practical and typical application is for treating exhaust gases from chemical reaction vessels.

[0076] like Figure 2 As shown, when the storage vessel 8 is a tail gas reactor, the tail gas from the chemical reactor is condensed and purified by the same system, and the condensate can be directly returned to the reactor according to the actual situation.

[0077] like Figure 3 As shown, when the condensate needs to be recovered independently, the output of the control pump 7 is directly discharged to the condensate storage container through the eighth pipe 312.

[0078] In this invention, since the condensation system is used in a distributed manner, its processing capacity is usually small. The most typical gas flow rate range is 2~50m3 / h but not limited to 50m3 / h. Therefore, the liquid nitrogen consumption of a single system is also small. Based on this situation, the liquid nitrogen storage tank 5 adopts a mobile liquid nitrogen storage tank, and the capacity of a single storage tank is less than 2 tons.

[0079] like Figure 4-11 As shown, in a preferred embodiment of the present invention, the cooling heat exchanger 1 includes a housing 001, a waste gas inlet pipe 003, a condenser plate 010, and a refrigeration pipe 006.

[0080] The exhaust gas inlet pipe 003 is fixedly installed at one end of the housing 001 and connected to the ninth pipe 307. During condensation operation, the exhaust gas enters the inner cavity of the housing 001 through the exhaust gas inlet pipe 003.

[0081] The condenser plate 010 is fixedly installed on the inner wall of the housing 001. The refrigeration pipe 006 is installed on the inner wall of the condenser plate 010 and extends to the outer wall of the condenser plate 010 at both ends. Both the refrigeration pipe 006 and the condenser plate 010 are made of copper. The flow of liquid nitrogen in the inner cavity of the refrigeration pipe 006 is controlled to achieve the cooling of the condenser plate 010. After the exhaust gas in the housing 001 comes into contact with the outer wall of the low temperature condenser plate 010, part of it condenses into liquid.

[0082] To facilitate the collection of condensate, a conduit for condensate discharge is provided at the bottom of the housing 001. This conduit is connected to the first storage tank 6 via a first pipe 310 so that the first storage tank 6 can collect condensate.

[0083] During the condensation process, some non-condensable gas remains in the inner cavity of the housing 001. In order to facilitate the discharge of non-condensable gas, a non-condensable gas discharge pipe is provided on the outer wall of the housing 001. The opening of the discharge pipe needs to be no lower than the liquid level in the inner cavity of the housing 001.

[0084] A filter plate 015 is fixedly installed on the side of the housing 001 near the exhaust gas inlet pipe 003. When exhaust gas is input into the inner cavity of the housing 001 through the exhaust gas inlet pipe 003, dust particles in the exhaust gas are filtered through the filter plate 015. During the condensation process, the filter plate 015 prevents particles in the exhaust gas from adhering to the outer wall of the condenser plate 010 as much as possible. During the condensation process, the filter plate 010 maintains the contact area with the exhaust gas, thereby maintaining the condensation efficiency.

[0085] Meanwhile, the filter plate 015 faces the exhaust gas inlet pipe 003, which can heat the filter plate 015 during the exhaust gas input process, thereby preventing water droplets from condensing on the outer wall of the filter plate 015 and improving the service life of the filter plate 015.

[0086] A collection box 002 is fixedly installed on the outer wall of the housing 001. The inner cavity of the collection box 002 is connected to the inner cavity of the housing 001. The collection box 002 is located directly below the filter plate 015. As dust particles adhere, they fall off the outer wall of the filter plate 015 and fall into the inner cavity of the collection box 002. At this time, the dust is collected by the collection box 002.

[0087] To facilitate the cleaning of dust inside the collection box 002, the collection box 002 is designed to be detachable, with its bottom and top detachably connected (using bolts). By removing the bottom of the collection box 002, the dust inside the collection box 002 can be emptied and cleaned.

[0088] An installation box 004 is fixedly installed on the outer wall of the housing 001. There are two installation boxes 004, which are symmetrically arranged on the outer wall of the housing 001. The inner cavity of the installation box 004 is connected to the inner cavity of the housing 001.

[0089] like Figure 6 As shown, the inner wall of the mounting box 004 is inclined, and the inclined surfaces inside the two mounting boxes 004 are in opposite positions. A control motor 005 is fixedly installed on the outer wall of the mounting box 004, and the two control motors 005 are installed in opposite positions and rotate in opposite directions.

[0090] The output shaft of the control motor 005 extends to the inner wall of the mounting box 004 and is fixedly mounted with control fan blades 012. The control motor 005 drives the control fan blades 012 to rotate, thereby generating airflow. Through the opposite rotation directions of the two control fan blades 012 and the guide of the inclined surfaces of the two mounting boxes 004, an internal circulating airflow is generated in the inner cavity of the housing 001, so that the exhaust gas inside the housing 001 can evenly contact the outer wall of the condenser plate 010 and keep the exhaust gas evenly cooled.

[0091] It should be noted that, in order to maintain the sealing of the inner cavity of the housing 001 as much as possible, a sealed bearing is provided at the contact position between the output shaft of the control motor 005 and the housing 001.

[0092] In a preferred embodiment of the present invention, a transmission rod 018 is slidably installed on the outer wall of the housing 001. One end of the transmission rod 018 extends to the inner wall of the housing 001 and a cleaning scraper 011 is fixedly installed thereon. The transmission rod 018 slides outside the housing 001, thereby driving the cleaning scraper 011 to slide.

[0093] The outer wall of the cleaning scraper 011 slides and adheres to the outer wall of the condenser plate 010. After condensation is completed, the cleaning scraper 011 is slid to scrape off the liquid on the outer wall of the condenser plate 010. This facilitates the recovery of condensate and prevents condensate from adhering to the outer wall of the condenser plate 010 and forming a sticky film after drying, which would affect subsequent cold chain operations.

[0094] To improve the cleaning efficiency of the cleaning scraper 011, the side wall of the cleaning scraper 011 is inclined, which makes it easier to scrape off impurities from the outer wall of the condensation plate 010 when the cleaning scraper 011 slides.

[0095] In a preferred embodiment of the present invention, a control cylinder 007 is provided on one side of the housing 001, and a control plug 016 is slidably installed on the inner wall of the control cylinder 007. Adjusting the pressure inside the control cylinder 007 causes the control plug 016 to slide.

[0096] A control shaft 017 is fixedly installed on one side of the control plug 016. The end of the control shaft 017 away from the control plug 016 is elastically connected to the outer wall of the transmission rod 018. A spring is provided on the outer wall of the control shaft 017, and it is elastically connected to the transmission rod 018 through the spring. When the control plug 016 slides, the transmission rod 018 is driven to slide through the control shaft 017, thereby achieving the scraping of the outer wall of the condenser plate 010.

[0097] The outer wall of the control cylinder 007 is provided with a conveying pipe 008. The conveying pipe 008 is spirally distributed on the outer wall of the control cylinder 007, and one end of the conveying pipe 008 is connected to the input end of the refrigeration pipe 006. The material of the conveying pipe 008 is the same as that of the refrigeration pipe 006.

[0098] In this embodiment, the input end of the delivery pipe 008 is connected to the fifth pipe 305, and low-temperature nitrogen and liquid nitrogen are provided through the second storage tank 3. When the low-temperature nitrogen and liquid nitrogen flow inside the delivery pipe 008, the temperature of the inner cavity of the control cylinder 007 is reduced, thereby causing the gas volume inside the control cylinder 007 to decrease. At this time, the control plug 016 slides into the control cylinder 007, driving the cleaning scraper 011 to slide to fit against the outer wall of the housing 001.

[0099] After condensation is complete, nitrogen is no longer supplied to the inner cavity of the delivery pipe 008. At this time, the temperature inside the control cylinder 007 gradually rises, causing the gas inside the control cylinder 007 to gradually expand. At this time, the control plug 016 drives the control shaft 017 and the transmission rod 018 to reset. During this process, the cleaning scraper 011 scrapes off the condensate on the outer wall of the condensation plate 010.

[0100] In a preferred embodiment of the present invention, an installation plate 009 is fixedly installed on the outer wall of the housing 001, and a limiting inclined block 021 is fixedly installed on the outer wall of the installation plate 009. The installation plate 009 is located on one side of the transmission rod 018, and multiple limiting inclined blocks 021 are evenly arranged along the outer wall of the installation plate 009.

[0101] A locking plate 020 for engaging with a limiting inclined block 021 is elastically mounted on the outer wall of the transmission rod 018 via a torsion spring. A bracket is provided on the outer wall of the transmission rod 018. The middle part of the locking plate 020 is connected to the bracket via a torsion spring. One end of the locking plate 020 tends to engage with the limiting inclined block 021.

[0102] By cooperating with the locking plate 020 and the limiting wedge block 021, the sliding of the transmission rod 018 can be unidirectionally limited. During the gas expansion process inside the control cylinder 007, the position of the transmission rod 018 is fixed by engaging the outer wall of the locking plate 020 and the limiting wedge block 021.

[0103] A top-pressing wedge 019 is fixedly installed at the axial end of the control shaft 017. The bottom surface of the top-pressing wedge 019 slides against the outer wall of the transmission rod 018 and is used to press the end of the locking plate 020 away from the limiting wedge 021. After the transmission rod 018 is fixed, the control shaft 017 continues to slide and compresses the spring between the control shaft 017 and the transmission rod 018 until the control shaft 017 pushes up the locking plate 020 through the top-pressing wedge 019, causing the locking plate 020 to separate from the limiting wedge 021. At this time, the spring releases elastic potential energy to drive the transmission rod 018 to accelerate. The cleaning scraper 011 is controlled to scrape by accelerating, thereby improving the cleaning efficiency of the condenser plate 010.

[0104] In this embodiment, since the spring performs simple harmonic motion when it returns to its original position, the cleaning scraper 011 moves synchronously and scrapes back and forth on the outer wall of the condenser plate 010, thereby improving cleaning efficiency.

[0105] In a preferred embodiment of the utility model, a transmission sleeve 014 is rotatably installed on the inner wall of the housing 001. The transmission sleeve 014 passes through the filter plate 015 and a cleaning plate 022 is fixedly installed thereon. The transmission sleeve 014 drives the cleaning plate 022 to rotate synchronously.

[0106] The outer wall of the cleaning plate 022 is attached to the side of the filter plate 015 near the exhaust gas inlet pipe 003. After condensation, the cleaning plate 022 is rotated to scrape off the dust on the outer wall of the filter plate 015 to prevent the filter plate 015 from clogging and make it easy to reuse.

[0107] A container cylinder 013 is fixedly installed on the inner wall of the container housing 001. A transmission plug 025 is slidably installed on the inner wall of the container cylinder 013. A transmission shaft 026 is rotatably installed on one side of the transmission plug 025. The container cylinder 013 is located inside the container housing 001 near the exhaust gas inlet pipe 003. When exhaust gas is introduced, the heat energy in the exhaust gas heats the outer wall of the container cylinder 013, causing the gas inside the container cylinder 013 to expand. This controls the sliding of the transmission plug 025 and the transmission shaft 026. After condensation, the exhaust gas stops flowing in, and the inside of the container cylinder 013 gradually returns to room temperature. At this time, the gas volume inside the container cylinder 013 decreases, controlling the transmission plug 025 and the transmission shaft 026 to reset.

[0108] A transmission frame 027 is fixedly installed on the inner wall of the accommodating cylinder 013. The transmission shaft 026 passes through the transmission frame 027. The inner wall of the transmission frame 027 is in contact with the radial outer wall of the transmission shaft 026, providing support for the transmission shaft 026.

[0109] The radial outer wall of the drive shaft 026 is provided with an annular groove 024, which is inclined. The drive frame 027 is provided with a spherical protrusion that slides with the annular groove 024. When the drive shaft 026 is slidable, the drive shaft 026 is driven to rotate through the cooperation between the spherical protrusion and the inclined annular groove 024.

[0110] The end of the drive shaft 026 away from the drive plug 025 is fixedly equipped with a plug rod 023 that slides into the drive sleeve 014. When the drive shaft 026 rotates, the drive sleeve 014 is driven to rotate through the plug rod 023 (the plug rod 023 is a regular hexagonal prism), thereby controlling the rotation of the cleaning plate 022 and realizing the scraping and cleaning of the filter plate 015.

[0111] like Figure 12 The diagram shows the process steps of this distributed condensation, including the following steps:

[0112] A1. Input exhaust gas;

[0113] A2. Condense the exhaust gas and discharge the condensate;

[0114] A3. No condensation occurs when the temperature rises;

[0115] A4. Recover nitrogen and deliver it for refrigeration.

[0116] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0117] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0118] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A distributed condensation system, characterized in that: It includes a gas supply unit, a cooling unit, a heating unit, a reflux unit, and a nitrogen supply unit; The gas supply unit is used to supply exhaust gas; The cooling unit is used to cool and condense the exhaust gas supplied by the gas supply unit. The heating unit is used to heat the non-condensable gas discharged from the cooling unit; The reflux unit is used to collect the condensate from the cooling unit. The nitrogen supply unit absorbs the cooling energy of the heating unit by supplying nitrogen gas during the heating phase and absorbs the heat of the cooling unit by supplying liquid nitrogen during the cooling phase.

2. A distributed condensation system according to claim 1, characterized in that: The gas supply unit includes a storage vessel (8) and a breather valve (14), wherein the breather valve (14) is located at the output end of the storage vessel (8); The cooling unit includes a cooling heat exchanger (1) and a ninth pipe (307), and the cooling heat exchanger (1) is connected to the breather valve (14) through the ninth pipe (307); The heating unit includes a heating heat exchanger (2) and a seventh pipe (309). The non-condensable air in the heating heat exchanger (2) is discharged through the seventh pipe (309). The reflux unit includes a first storage tank (6) and a first level gauge (22). The first level gauge (22) detects the liquid level in the inner cavity of the first storage tank (6). The first storage tank (6) is connected to the condensate discharge end of the cooling heat exchanger (1) through a first pipe (310). The nitrogen supply unit includes a liquid nitrogen storage tank (5), a vaporizer (4), and a second storage tank (3). The liquid nitrogen output from the liquid nitrogen storage tank (5) is vaporized by the vaporizer (4) and discharged to the hot end of the heating heat exchanger (2). The second storage tank (3) is used to store the nitrogen discharged from the heating heat exchanger (2), and the liquid nitrogen and nitrogen gas in the second storage tank (3) are mixed and then supplied to the cooling heat exchanger (1).

3. A distributed condensation system according to claim 2, characterized in that: The cooling heat exchanger (1) includes a housing (001), an exhaust gas inlet pipe (003), a condenser plate (010), and a refrigeration pipe (006). The exhaust gas inlet pipe (003) is fixedly installed at one end of the housing (001) and connected to the ninth pipe (307); The condenser plate (010) is fixedly installed on the inner wall of the housing (001), and the refrigeration pipe (006) is disposed on the inner wall of the condenser plate (010) and extends to the outer wall of the condenser plate (010) at both ends.

4. A distributed condensation system according to claim 3, characterized in that: A filter plate (015) is fixedly installed on the side of the housing (001) near the exhaust gas inlet pipe (003). A collection box (002) is fixedly installed on the outer wall of the housing (001). The inner cavity of the collection box (002) is connected to the inner cavity of the housing (001), and the collection box (002) is located directly below the filter plate (015). An installation box (004) is fixedly installed on the outer wall of the housing (001). There are two installation boxes (004), which are symmetrically arranged on the outer wall of the housing (001). The inner wall of the mounting box (004) is inclined, and the inclined surfaces inside the two mounting boxes (004) are in opposite positions; A control motor (005) is fixedly installed on the outer wall of the mounting box (004). The output shaft of the control motor (005) extends to the inner wall of the mounting box (004) and is fixedly installed with control fan blades (012).

5. A distributed condensation system according to claim 4, characterized in that: A transmission rod (018) is slidably installed on the outer wall of the housing (001). One end of the transmission rod (018) extends to the inner wall of the housing (001) and is fixedly installed with a cleaning scraper (011). The outer wall of the cleaning scraper (011) is slidably attached to the outer wall of the condensation plate (010). The sidewall of the cleaning scraper (011) is inclined.

6. A distributed condensation system according to claim 5, characterized in that: A control cylinder (007) is provided on one side of the housing (001). A control plug (016) is slidably installed on the inner wall of the control cylinder (007). A control shaft (017) is fixedly installed on one side of the control plug (016). The end of the control shaft (017) away from the control plug (016) is elastically connected to the outer wall of the transmission rod (018). The outer wall of the control cylinder (007) is provided with a delivery pipe (008), which is spirally distributed on the outer wall of the control cylinder (007), and one end of the delivery pipe (008) is connected to the input end of the refrigeration pipe (006).

7. A distributed condensation system according to claim 6, characterized in that: An installation plate (009) is fixedly installed on the outer wall of the accommodating shell (001), and a limit wedge (021) is fixedly installed on the outer wall of the installation plate (009). The outer wall of the transmission rod (018) is elastically fitted with a locking plate (020) for engaging with the limiting inclined block (021) by a torsion spring. A top-pressing inclined block (019) is fixedly installed at the axial end of the control shaft (017). The bottom surface of the top-pressing inclined block (019) slides against the outer wall of the transmission rod (018) and is used to press the locking plate (020) away from the end of the limiting inclined block (021).

8. A distributed condensation system according to claim 7, characterized in that: The inner wall of the housing (001) is rotatably mounted with a transmission sleeve (014), which penetrates the filter plate (015) and is fixedly mounted with a cleaning plate (022). The outer wall of the cleaning plate (022) is attached to the side of the filter plate (015) near the exhaust gas inlet pipe (003).

9. A distributed condensation system according to claim 8, characterized in that: The inner wall of the housing (001) is fixedly installed with a housing cylinder (013), and a transmission plug (025) is slidably installed on the inner wall of the housing cylinder (013). A transmission shaft (026) is rotatably installed on one side of the transmission plug (025). A transmission frame (027) is fixedly installed on the inner wall of the accommodating cylinder (013), and the transmission shaft (026) passes through the transmission frame (027). The outer radial wall of the drive shaft (026) is provided with an annular groove (024), the annular groove (024) is inclined, and the drive frame (027) is provided with a spherical protrusion that slides with the annular groove (024); The drive shaft (026) is fixedly mounted with a plug rod (023) that slides into the drive sleeve (014) at one end away from the drive plug (025).

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