A vapor-liquid separation condenser for kitchen waste recycling treatment

Abstract

The application discloses a kind of vapor-liquid separation condensers for kitchen garbage recycling treatment, belong to kitchen garbage processing equipment field.The device includes condensing tank, separation tank and separate pipe group.Condensing tank is installed at the top of garbage processing device, inside is equipped with condensing pipe, and the flow tank of condensed liquid is communicated with separation tank.Separation tank is divided into communicating bin, front separation bin, rear separation bin, exhaust bin, oil discharge bin and water discharge bin inside, and high-low difference is formed by front oil baffle, rear oil baffle and overflow plate, realize the automatic gravity separation of oil and water, effectively prevent "run oil" and "with water".The exhaust pipe of separate pipe group is connected in turn with sub-cooler and filter pipe group, and waste gas is separated and purified by activated carbon adsorption for two times.The application integrates condensation, oil-water separation and waste gas purification, has compact structure, high separation efficiency, no odor diffusion, and has low-temperature anti-blocking ability, and is especially suitable for resource treatment of high-temperature multiphase fluid generated by kitchen garbage heat treatment.

Description

Technical Field

[0001] This invention relates to the technical field of kitchen waste treatment equipment, specifically to a vapor-liquid separator condenser for kitchen waste recycling and treatment, which is particularly suitable for the multiphase separation and recycling of high-temperature vaporized wastewater generated after the thermal treatment of kitchen waste. Background Technology

[0002] With increasingly stringent environmental protection requirements and the deepening of waste sorting policies, the resource utilization and harmless treatment of kitchen waste has become a hot topic in the industry. Currently, mainstream kitchen waste treatment methods include aerobic composting, anaerobic fermentation, and thermal treatment (such as drying, carbonization, and pyrolysis). Among these, thermal treatment technology can effectively reduce volume and weight, kill pathogens, and convert organic matter into usable fuel or charcoal materials.

[0003] However, food waste has a high water content (typically 70%-90%), generating a large amount of high-temperature mixed steam during heat treatment. This steam is not pure water vapor, but a complex multiphase fluid containing water vapor, volatile organic gases, grease vapor, and fine solid particles. Direct discharge not only wastes heat energy but also produces serious odors and air pollution. Current technologies typically use simple condensers to condense the steam into liquid, which is then processed through a gravity-type oil-water separator.

[0004] However, the existing equipment has the following prominent problems: First, the function is limited. Condensation and separation are often set up separately, the equipment occupies a large area, the pipeline connection is complicated, and high-temperature steam is prone to secondary condensation during long-distance transportation.

[0005] Secondly, traditional oil-water separators are sensitive to liquid level fluctuations. When the oil content or flow rate in kitchen wastewater changes, "oil spillage" or "water carryover" can easily occur, resulting in low separation efficiency.

[0006] Third, non-condensable gases (such as hydrogen sulfide, ammonia, and low-molecular-weight hydrocarbons) generated during heat treatment are often emitted directly without treatment, causing serious odor pollution.

[0007] Fourth, in low-temperature winter conditions, the separated sludge and oil are prone to solidify and block the pipelines, affecting the continuous operation of the system.

[0008] Therefore, there is an urgent need for an integrated gas-liquid separation and condensation device that is compact in structure, has high separation efficiency, combines gas purification function, and can adapt to harsh working conditions. Summary of the Invention

[0009] To address the shortcomings of the prior art, this invention provides a vapor-liquid separator condenser for kitchen waste recycling and treatment, aiming to achieve integrated treatment of vaporized wastewater condensation, efficient three-phase separation of oil, water and gas, and waste gas purification after kitchen waste heat treatment.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: A vapor-liquid separator condenser for food waste recycling and treatment is installed on a food waste treatment device and includes: a condensation box, a separation box, and a distribution pipe assembly.

[0011] The condenser is installed on top of the waste treatment unit and directly connected to the heat treatment chamber. A steam inlet is located at the bottom of one end of the condenser, and condenser pipes connecting to an external refrigeration system are installed inside. High-temperature mixed steam enters the condenser and exchanges heat with the condenser pipes, condensing water vapor and oil vapor into a liquid mixture. A collection trough is formed at the bottom of the other end of the condenser to collect the condensed liquid. An exhaust port is located at the top of the condenser, through which uncondensed non-condensable gases enter the top of the separation chamber.

[0012] One side of the separator is connected to the condenser's collection channel, and the other side is connected to the distribution pipe assembly. The separator's interior is cleverly divided into a connecting chamber, a front separator, a rear separator, an exhaust chamber, an oil drain chamber, and a drainage chamber by partitions, baffles, and overflow plates. The mixture in the collection channel first enters the connecting chamber and then flows smoothly into the front separator. In the front separator, due to the density difference between oil and water, the oil rises and the water sinks. A front baffle is installed between the front and rear separators, forming a front separation port at its bottom; a rear baffle is installed between the rear separator and the drainage chamber, forming a rear separation port at its bottom. The key design feature is that the height of the front separation port is lower than that of the rear separation port. When the liquid level is low, only the lower layer of water can enter the rear separator through the front separation port, while the upper layer of oil is blocked. As the liquid level rises further, the water passes through the front and rear separation ports sequentially, and finally enters the drainage chamber after being filtered by the primary filter plate. Simultaneously, the front and rear separators are separated from the drainage chamber by overflow plates. When the oil layer thickens and the liquid level approaches the top of the spill plate, the oil automatically overflows into the drain tank, achieving "automatic skimming at high oil levels".

[0013] The exhaust chamber faces the connecting chamber, and its top is connected to other chambers to collect gases generated from various locations. An intake baffle can be installed on the top of the exhaust chamber to prevent debris from entering.

[0014] The separation pipe assembly includes a drain pipe, an oil drain pipe, and an exhaust pipe. The drain pipe connects to the drain chamber, discharging the separated wastewater to the subsequent treatment unit. The oil drain pipe connects to the oil drain chamber, and its bottom is equipped with a heating pipe to prevent freezing and solidification of sludge and oil when the temperature is too low. The upper end of the oil drain pipe connects to the top of the exhaust pipe, guiding the exhaust gas emitted from the sludge and oil into the exhaust pipe. The exhaust pipe connects to the exhaust chamber, and its bottom connects to the exhaust mechanism (such as a fan). Specifically, a redistributor and a filter pipe assembly are installed sequentially between the exhaust pipe and the exhaust mechanism.

[0015] The re-separator is used for secondary gas-liquid separation of the gas discharged from the condenser and separator. After the gas enters the re-separator, residual water vapor is intercepted by the filter element, guided into the water collection pipe through the hydrophobic umbrella, and discharged into the drain pipe through the hose; while the dried gas passes through the filter element and enters the filter tube assembly. The filter tube assembly includes a filter duct and multiple filter screens. The filter screens are installed at key nodes through connecting sleeves, and the filter duct is filled with adsorption materials such as activated carbon to deeply adsorb and filter malodorous components and trace organic matter in the gas. Finally, the gas is exhausted outdoors or to subsequent treatment devices by the exhaust mechanism.

[0016] Through the above structure, the present invention realizes the integrated treatment of vaporized wastewater through multiple processes, including condensation, oil-water separation, gas purification, and low-temperature anti-clogging. Beneficial effects

[0017] Compared with the prior art, the present invention has the following outstanding advantages: Highly integrated and compact: It integrates condensation, oil-water separation, gas purification and discharge functions into one unit, and is directly installed on the top of the waste treatment device, which shortens the transportation distance of high-temperature steam, reduces heat loss and the risk of secondary pollution, and saves floor space.

[0018] High oil-water separation efficiency and strong resistance to liquid level fluctuations: By setting the height difference between the front and rear separation ports and the oil overflow plate, passive automatic separation is achieved by utilizing gravity and density difference. The design of the front separation port being lower than the rear separation port ensures that oil will not enter the drainage area when the liquid level is low; when the liquid level is high, oil will automatically overflow into the oil discharge tank, avoiding "oil spillage" and "water carryover" phenomena, and the separation effect is stable.

[0019] Thorough gas purification with no odor diffusion: The system collects exhaust gases generated from the condenser, separator, oil drain pipe, and other sources, and uses a re-distributor for secondary dehumidification. Then, through multi-stage filtration with activated carbon, it effectively removes odorous components such as hydrogen sulfide and ammonia, resulting in high exhaust cleanliness and improved working environment.

[0020] Anti-freeze design with strong adaptability: A heating element is installed at the bottom of the oil drain pipe, which can be automatically or manually started in winter or cold regions to prevent sludge from condensing and clogging the pipes, ensuring reliable operation of the system all year round and in all weather conditions.

[0021] Simple operation and maintenance: The entire system mainly relies on gravity, pressure difference, and simple fan power, with no complex moving parts. The filter element and activated carbon of the re-distributor and filter tube assembly are easy to replace, and the primary filter plate can be cleaned regularly, resulting in low maintenance costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 3 This is a top view of the present invention; Figure 4 Cross-sectional view of the present invention Figure 1 ; Figure 5 For the purposes of this invention, a cross-sectional view is required. Figure 6 Cross-sectional view of the present invention Figure 3 ; Figure 7 Cross-sectional view of the present invention Figure 4 ; Figure 8 This is an exploded view of the present invention.

[0023] The numbers on the map are: 1-Condenser; 11-Steam Inlet; 12-Condenser Pipe; 13-Collector; 14-Exhaust Port; 2-Separation box; 21-Connecting compartment; 22-Front separation compartment; 23-Rear separation compartment; 24-Exhaust compartment; 241-Intake baffle; 25-Oil drain compartment; 26-Drainage compartment; 261-Primary filter plate; 27-Front oil baffle; 271-Front separation port; 28-Rear oil baffle; 281-Rear separation port; 29-Oil overflow plate; 3-Divider pipe assembly; 31-Drain pipe; 32-Oil drain pipe; 321-Heating pipe; 33-Exhaust pipe; 34-Exhaust mechanism; 4-Redistributor; 41-Distributor head; 411-Distributor port; 412-Air vent; 42-Filter element; 421-Filter cover; 422-Hydrophobic umbrella; 43-Connector; 44-Water collection pipe; 5-Filter tube assembly; 51-Filter duct; 52-Filter screen; 53-Connecting sleeve. Detailed Implementation

[0024] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0025] like Figures 1 to 8 As shown, a certain kitchen waste resource recovery equipment uses an indirect thermal drying process to treat dehydrated kitchen waste (with a moisture content of approximately 75%). The vapor-liquid separator condenser of this invention is installed on top of the mixing dryer.

[0026] Equipment installation and initial status: The condenser box 1 is fixed to the steam outlet at the top of the dryer via a flange, and the steam inlet 11 is connected to the interior of the dryer. The external refrigeration unit's Freon refrigeration system is connected to the condenser pipe 12. The separator box 2 is located below the side of the condenser box 1, and the collection trough 13 is connected to the connecting chamber 21. The drain pipe 31 of the branch pipe group 3 is connected to the sewage regulating tank, the oil drain pipe 32 is connected to the sludge oil collection tank, and the exhaust pipe 33 is connected to the exhaust fan mechanism 34 via the redistributor 4 and the filter pipe group 5. The exhaust fan outlet leads to the main exhaust gas treatment pipe. Check that there are no foreign objects in each compartment. The primary filter plate 261 is a 100-mesh stainless steel filter screen, the filter element 42 is a polytetrafluoroethylene hydrophobic microporous filter element, and the filter pipe group 5 is filled with columnar activated carbon with a particle size of 4mm. The heating pipe 321 is a self-regulating temperature tracing tape with a preset start-up temperature of 5℃.

[0027] Operation process: Condensation and collection stage The mixing dryer starts, heating the kitchen waste to 120°C. A large amount of mixed steam (containing 70% water vapor, 15% oil vapor, 15% non-condensable gases, and trace amounts of dust) enters the condenser 1 through the steam inlet 11. The refrigeration unit maintains the surface temperature of the condenser tubes 12 at 8-10°C. Upon contact with the condenser tubes, the steam rapidly condenses into droplets, sliding down the tube walls and the inner wall of the chamber to the bottom. The uncondensed non-condensable gases, due to their lower density, rise and exit from the exhaust port 14 at the top. The condensed mixed liquid, at a temperature of approximately 30-35°C, collects along the sloping bottom of the chamber in the lowest collecting trough 13, and flows continuously into the connecting chamber 21 of the separator 2 by gravity.

[0028] Gravity oil-water separation stage The mixture flows smoothly from the connecting chamber 21 into the front separation chamber 22. Within the front separation chamber 22, due to the density difference between oil and water, a distinct stratification forms after approximately 2-3 minutes: the upper layer is floating oil containing a small amount of light oil and emulsified oil, while the lower layer is an aqueous phase containing dissolved substances and suspended solids. Initially, when the liquid level is low, the lower layer of water enters the rear separation chamber 23 through the front separation port 271 located at the bottom of the front oil baffle 27. The height of the front separation port 271 is designed to be approximately 50mm lower than the rear separation port 281, thus effectively blocking the oil layer from entering the rear separation chamber. As condensate continues to flow in, the liquid level gradually rises. The water in the rear separation chamber 23 passes through the rear separation port 281 and is filtered by the primary filter plate 261, where large solid particles are intercepted. The clean water then flows into the drainage chamber 26 and is finally discharged into the wastewater equalization tank via the drainage pipe 31. When the oil layer thickness increases to approximately 10mm from the top of the overflow plate 29, the floating oil, due to its lower density, automatically overflows the overflow plate 29 and enters the discharge chamber 25. The sludge in the drain hopper 25 flows slowly into the sludge collection tank through the drain pipe 32. When the ambient temperature is 3℃, the heating pipe 321 is automatically energized with a heating power of 25W / m to ensure that the inner wall temperature of the drain pipe 32 is maintained above 10℃, and the sludge remains in a flowing state.

[0029] Waste gas collection and purification stage The waste gas generated within the system mainly originates from three sources: first, non-condensable gases discharged from exhaust port 14 of the condenser 1; second, gases evaporating above the liquid surface in the front separation chamber 22 and the rear separation chamber 23; and third, odors emanating from the sludge in the oil discharge chamber 25. These gases all enter the exhaust chamber 24 through the interconnected structure at the top of the separation chamber 2, and then converge via the exhaust pipe 33. The induced draft fan exhaust mechanism 34 is activated to maintain a slight negative pressure (approximately -200 Pa) within the system, preventing waste gas leakage.

[0030] The gas first enters the re-divider 4 through the exhaust pipe 33. The gas then passes through the connecting sleeve 53 and the filter screen 52 into the distribution port 411 of the distribution head 41, and subsequently enters the inner side of the filter element 42. Due to the hydrophobic properties of the filter element 42, residual water vapor in the gas (relative humidity of approximately 40%-50%) is intercepted and condensed, forming droplets that are then guided by gravity along the hydrophobic umbrella 422 to the bottom of the water collection pipe 44. The bottom of the water collection pipe 44 is connected to the drain pipe 31 via a flexible hose, allowing condensate to be drained away nearby. The dried gas, with a relative humidity below 10%, passes through the filter element 42 into the top area of ​​the water collection pipe 44, then through the air guide hole 412 on the distribution head 41 into the connector 43, and finally downwards into the filter tube assembly 5.

[0031] The gas passes sequentially through the filter assembly 5: the first filter 52 intercepts particulates, the activated carbon layer (approximately 300 mm thick) adsorbs hydrogen sulfide and organic matter, and the second filter 52 prevents carbon powder from being carried out. After the above treatment, the odor concentration in the exhaust gas is reduced to below the limit of the "Odor Pollutant Emission Standard" (GB14554-93), and is finally discharged into the main pipe by the induced draft fan.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A vapor-liquid separator condenser for kitchen waste recycling and treatment, installed on a kitchen waste treatment device, for the recycling and treatment of wastewater from the evaporation or vaporization of kitchen waste after thermal treatment, characterized in that... include: The condenser (1) condenses and collects vaporized wastewater, the separator (2) separates the collected wastewater into oil and water, and the drain pipe assembly (3) separates the separated oil, water and gas phases. The condenser (1) is installed on top of the waste treatment device and is connected to the waste treatment device. One side of the separator (2) is connected to the collection end of the condenser (1), and the other side is connected to the corresponding branch pipe group (3). The condenser box (1) is equipped with a condenser pipe (12) connected to an external refrigeration system. A steam inlet (11) is opened at the bottom of one end of the condenser box (1), and a collection groove (13) is formed by sloping down at the bottom of the other end. The collection groove (13) is connected to the separation box (2), and an exhaust port (14) is opened at the top. The exhaust port (14) is connected to the top of the separation box (2). The separation chamber (2) includes a connecting chamber (21), a front separation chamber (22), a rear separation chamber (23), an exhaust chamber (24), an oil drain chamber (25), and a drainage chamber (26). The connecting chamber (21) is connected to the collection trough (13) of the condenser (1). The front separation chamber (22) is separated from the connecting chamber (21) and the rear separation chamber (23) by a partition. The front separation chamber (22) and the rear separation chamber (23) are directly opposite the oil drain chamber (25). A front oil baffle (27) is provided between the front separation chamber (22) and the rear separation chamber (23). The bottom of the front oil baffle (27) is shaped similarly to the bottom of the front separation chamber (22). The front separation port (271) is formed. The rear separation chamber (23) and the drainage chamber (26) are separated by a rear oil baffle (28), and the rear oil baffle (28) and the bottom of the drainage chamber (26) form a rear separation port (281). The height of the front separation port (271) is lower than the height of the rear separation port (281). The front separation chamber (22), the rear separation chamber (23) and the oil discharge chamber (25) are separated by an overflow plate (29). The exhaust chamber (24) is directly opposite the connecting chamber (21). The top of the exhaust chamber (24) is connected to other chambers for exhaust. A primary filter plate (261) is installed at the rear separation port (281) of the drainage chamber (26).

2. The vapor-liquid separator condenser for kitchen waste recycling and treatment according to claim 1, characterized in that, The drain pipe assembly (3) includes a drain pipe (31), an oil drain pipe (32), and an exhaust pipe (33). The drain pipe (31) is connected to the drain chamber (26), the oil drain pipe (32) is connected to the oil drain chamber (25), a heating pipe (321) is installed at the bottom of the oil drain pipe (32), the upper end of the oil drain pipe (32) is connected to the top of the exhaust pipe (33), the exhaust pipe (33) is connected to the exhaust chamber (24), the bottom of the exhaust pipe (33) is connected to the ventilation mechanism (34), and a re-divider (4) and a filter pipe assembly (5) are installed between the exhaust pipe (33) and the ventilation mechanism (34).

3. A vapor-liquid separator and condenser for kitchen waste recycling and treatment according to claim 1, characterized in that, The resealant (4) separates the water vapor contained in the gas discharged from the condenser (1) and the separator (2) again, filters out the water vapor separated again and introduces it into the drain pipe (31), and the gas separated again enters the filter pipe group (5) for filtration.

4. A vapor-liquid separator and condenser for kitchen waste recycling and treatment according to claim 2, characterized in that, The resealant (4) separates the water vapor contained in the gas discharged from the condenser (1) and the separator (2) again, filters out the water vapor separated again and introduces it into the drain pipe (31), and the gas separated again enters the filter pipe group (5) for filtration.

5. A vapor-liquid separator and condenser for kitchen waste recycling and treatment according to claim 4, characterized in that, The resplitter (4) is installed on the top of the filter pipe assembly (5) and connected to the exhaust pipe (33). The resplitter (4) includes a distributor head (41), a filter element (42) and a connector (43). The distributor head (41) is connected to the connecting sleeve (53) at the bottom of the exhaust pipe (33). The upper end of the connector (43) is inserted into the bottom of the distributor head (41). The filter element (42) is sleeved on the lower end of the distributor head (41). The top of the distributor head (41) and the bottom of the connector (43) are sealed together by a water collection pipe (44). The water collection pipe (44) is located outside the filter element (42) and its bottom is connected to the drain pipe (31) by a hose.

6. A vapor-liquid separator and condenser for kitchen waste recycling and treatment according to claim 5, characterized in that, The top of the filter element (42) is fitted with a filter cover (421), and the bottom of the filter element (42) is connected to the connector (43) through a hydrophobic umbrella (422). The bottom of the connector (43) is connected to the connecting sleeve (53) at the top of the air duct (51).

7. A vapor-liquid separator and condenser for kitchen waste recycling and treatment according to claim 5, characterized in that, The guide head (41) has a guide port (411) inside, which connects the exhaust pipe (33) and the inside of the filter element (42). The guide head (41) also has an air guide hole (412), which connects the connector (43) and the water collection pipe (44).

8. A vapor-liquid separator and condenser for kitchen waste recycling and treatment according to claim 1, characterized in that, An air intake baffle (241) can be installed on the top of the exhaust chamber (24) to prevent flying insects and debris from entering.

9. A vapor-liquid separator and condenser for kitchen waste recycling and treatment according to claim 1, characterized in that, The height of the front separation port (271) is lower than that of the rear separation port (281) to prevent oil from entering the rear separation chamber (23) and the drainage chamber (26) when the liquid level is too low.

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