A horizontal thermal plasma ship waste treatment system

Abstract

This invention discloses a horizontal thermal plasma ship waste treatment system, comprising a crushing and conveying device, a plasma pyrolysis gasification combustion device, and a waste heat recovery device. The plasma pyrolysis gasification combustion device is arranged horizontally, positioned below and connected to the crushing and conveying device. The waste heat recovery device includes a flue gas waste heat recovery unit and a cooling unit, both arranged horizontally. The flue gas waste heat recovery unit is connected to the plasma pyrolysis gasification combustion device, and both the flue gas waste heat recovery unit and the plasma pyrolysis gasification combustion device are located within the cooling unit. According to this invention, the horizontal thermal plasma ship waste treatment system can effectively reduce the space occupied on the ship, effectively lower the center of gravity of the plasma pyrolysis gasification combustion device, enhance the anti-sway capability and efficiency of the horizontal thermal plasma ship waste treatment system, and effectively recover the heat generated by waste combustion, thereby improving energy utilization efficiency.

Description

Technical Field

[0001] This invention belongs to the field of ship solid waste treatment technology, and specifically relates to a horizontal thermal plasma treatment system for ship waste. Background Technology

[0002] Ships generate a large amount of solid waste during navigation. This waste not only occupies limited space on board, leading to environmental degradation, but is also subject to various marine protection laws and regulations, such as the MARPOL 73 / 78 Convention on Pollution Prevention and Control, preventing its arbitrarily discharged into the ocean. With increasing global emphasis on marine environmental protection, research into ship solid waste treatment technologies has received widespread attention.

[0003] Currently, ship solid waste is typically classified and treated. General solid waste such as paper, textiles, and wood is usually incinerated in ship incinerators, and the resulting slag is directly discharged into the sea. Hazardous waste such as plastics, oily sludge, and medical waste is usually stored in specific holds and then recycled ashore. Non-incinerable solid waste, such as food waste, metals, and glass, is typically collected and recycled separately for recyclable parts, while the remaining parts are crushed, dried, and discharged into the sea.

[0004] With the rapid development of society and the economy, the number of ocean voyages and the duration of voyages are increasing year by year, leading to a corresponding increase in the amount of ship solid waste, especially hazardous waste such as plastics, oil sludge, and medical waste. Existing ship solid waste treatment technologies suffer from problems such as incomplete combustion, the generation of leachate, toxic exhaust gases, and fly ash, as well as the inability to recover and utilize waste heat from incineration. These issues easily cause secondary environmental pollution and energy waste, and pose potential hazards to cabin environment and crew health. Furthermore, existing ship solid waste treatment systems occupy a large amount of space, and are constrained by ship space, treatment costs, and various marine protection laws and regulations. Therefore, existing ship solid waste treatment systems and technologies can no longer meet the needs of ship solid waste treatment.

[0005] Therefore, there is a need to provide a horizontal thermal plasma ship waste treatment system to at least partially solve the problems in the relevant technologies. Summary of the Invention

[0006] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0007] To at least partially solve the above problems, the present invention provides a horizontal thermal plasma ship waste treatment system, the horizontal thermal plasma ship waste treatment system comprising:

[0008] Crushing and conveying equipment;

[0009] A plasma pyrolysis gasification combustion device is arranged horizontally, located below the crushing and conveying device, and connected to the crushing and conveying device.

[0010] A waste heat recovery device includes a flue gas waste heat recovery unit and a cooling unit. Both the flue gas waste heat recovery unit and the cooling unit are arranged in a horizontal direction. The flue gas waste heat recovery unit is connected to the plasma pyrolysis gasification combustion device, and both the flue gas waste heat recovery unit and the plasma pyrolysis gasification combustion device are located in the cooling unit.

[0011] According to the horizontal thermal plasma ship waste treatment system of the present invention, the plasma pyrolysis gasification combustion device is arranged horizontally, which can effectively reduce the occupation of the plasma pyrolysis gasification combustion device in the limited height space of the ship, and can effectively lower the center of gravity of the plasma pyrolysis gasification combustion device, enhance the anti-sway capability of the horizontal thermal plasma ship waste treatment system, and thus effectively improve the efficiency of the horizontal thermal plasma ship waste treatment system. The waste heat recovery device can effectively recover the heat generated by waste combustion, improving energy utilization efficiency. Furthermore, by placing both the flue gas waste heat recovery unit and the plasma pyrolysis gasification combustion device in the cooling unit, the compactness of the horizontal thermal plasma ship waste treatment system can be effectively improved, reducing the space occupied by the horizontal thermal plasma ship waste treatment system on the ship.

[0012] Optionally, the horizontal thermal plasma ship waste treatment system further includes:

[0013] A smoke exhaust device, which is connected to the flue gas waste heat recovery unit;

[0014] A denitrification device, which is connected to the tail end of the plasma pyrolysis gasification combustion device;

[0015] A desulfurization device, which is connected to the flue gas exhaust device.

[0016] Optionally, the plasma pyrolysis gasification combustion device includes:

[0017] Thermal plasma torch;

[0018] A pyrolysis gasification device is arranged horizontally and connected to the crushing and conveying device. The ignition end of the thermal plasma torch extends into the head of the pyrolysis gasification device to inject a high-temperature plasma jet into the pyrolysis gasification device.

[0019] A fluidized gas supply device is provided below the pyrolysis gasification device, and the fluidized gas supply device includes a gas inlet for supplying a fluidized gas medium into the pyrolysis gasification device.

[0020] A combustion device is provided at the tail end of the pyrolysis gasification device and is arranged in a horizontal direction;

[0021] A reburning device is provided at the tail of the combustion device and connected to the denitrification device of the horizontal thermal plasma ship waste treatment system.

[0022] Optionally, the flue gas waste heat recovery unit includes a high-temperature flue gas waste heat recovery unit and a flue gas rapid cooling waste heat recovery unit, wherein the high-temperature flue gas waste heat recovery unit is disposed between the high-temperature flue gas waste heat recovery unit and the plasma pyrolysis gasification combustion device.

[0023] Optionally, the horizontal thermal plasma ship waste treatment system further includes a water supply device connected to the water inlet of the cooling unit.

[0024] Optionally, a secondary air inlet is provided at the lower part of the combustion device.

[0025] Optionally, the fluidized gas supply device further includes a slag discharge port, which is located at the bottom of the fluidized gas supply device.

[0026] Optionally, the pyrolysis gasification device and / or the combustion device include a corrugated structure.

[0027] Optionally, the cooling unit includes a vent, through which the cooling unit communicates with the outside.

[0028] Optionally, the cooling unit includes a lifting ring and a drain outlet, with the lifting ring located at the top of the cooling unit and the drain outlet located at the bottom of the cooling unit. Attached Figure Description

[0029] The following drawings, which illustrate embodiments of the present invention, are incorporated herein by reference as part of the invention and are used to understand the invention. The drawings show embodiments of the invention and their descriptions, serving to explain the principles of the invention.

[0030] In the attached image:

[0031] Figure 1This is a horizontal thermal plasma ship waste treatment system according to a preferred embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100: Horizontal thermal plasma ship waste treatment system; 110: Crushing and conveying device.

[0034] 111: Crusher 112: Conveyor

[0035] 120: Plasma pyrolysis gasification combustion device; 121: Thermal plasma torch

[0036] 122: Cracking and gasification unit; 123: Fluidized gas supply unit

[0037] 124: Combustion device; 125: Recirculation device

[0038] 126: Gas inlet; 127: Slag discharge port

[0039] 128: Secondary air inlet; 130: Waste heat recovery device

[0040] 131: Flue gas waste heat recovery unit; 132: Cooling unit

[0041] 133: High-temperature flue gas waste heat recovery unit; 134: Flue gas rapid cooling waste heat recovery unit

[0042] 135: Water inlet; 136: Air vent

[0043] 137: Hanging ring; 138: Drain outlet

[0044] 139: Water outlet; 140: Smoke exhaust device

[0045] 141: Exhaust port; 150: Denitrification device

[0046] 160: Desulfurization unit; 170: Water supply unit

[0047] 180: Corrugated structure; 190: Slag pool Detailed Implementation

[0048] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with embodiments of the invention.

[0049] To fully understand the present invention, a detailed description will be set forth below to illustrate the intercooler of the present invention. Obviously, the implementation of the present invention is not limited to the specific details familiar to those skilled in the art of intercoolers. Preferred embodiments of the present invention are described in detail below; however, in addition to these detailed descriptions, the present invention may have other embodiments.

[0050] The ordinal numbers such as "first" and "second" used in this invention are merely identifiers and do not have any other meaning, such as a specific order. Furthermore, for example, the term "first component" does not imply the existence of a "second component," and the term "second component" does not imply the existence of a "first component." The terms "upper," "lower," "front," "rear," "left," "right," and similar expressions used in this invention are for clarification only and are not intended to be limiting.

[0051] Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings, which illustrate representative embodiments of the present invention and are not intended to limit the present invention.

[0052] refer to Figure 1 According to a preferred embodiment of the present invention, a horizontal thermal plasma ship waste treatment system 100 includes a crushing and conveying device 110, a plasma pyrolysis gasification and combustion device 120, and a waste heat recovery device 130.

[0053] The crushing and conveying device 110 includes a crusher 111 and a conveyor 112. Solid waste from the ship is fed into the crusher 111 and crushed into particles with a diameter no greater than 50 mm, preferably no greater than 10 mm. The conveyor 112 is located below the crusher 111. One end of the conveyor 112 is connected to the crusher 111, and the other end is connected to the plasma pyrolysis gasification combustion device 120. Waste particles in the crusher 111 are conveyed to the plasma pyrolysis gasification combustion device 120 via the conveyor 112. The conveyor 112 can be configured as a screw conveyor.

[0054] The plasma pyrolysis gasification combustion device 120 is located below the crusher 111 and is connected to the crusher 111 via a conveyor 112. For example, the feed inlet of the plasma pyrolysis gasification combustion device 120 is connected to the discharge outlet of the crusher 111 via the conveyor 112. The plasma pyrolysis gasification combustion device 120 is arranged horizontally, which effectively reduces its occupation of the limited vertical space of the ship, thereby lowering the center of gravity of the plasma pyrolysis gasification combustion device 120, enhancing the anti-sway capability of the horizontal thermal plasma ship waste treatment system 100, and thus effectively improving the efficiency of the horizontal thermal plasma ship waste treatment system 100.

[0055] The plasma pyrolysis gasification combustion device 120 preferably includes a thermal plasma torch 121, a pyrolysis gasification device 122, a fluidized gas supply device 123, and a combustion device 124.

[0056] The pyrolysis gasification unit 122 is arranged horizontally and connected to the crusher 111 via a conveyor 112, such that the feed inlet of the pyrolysis gasification unit 122 is connected to the discharge outlet of the crusher 111 via the conveyor 112. Waste particles in the crusher 111 are transported to the pyrolysis gasification unit 122 via the conveyor.

[0057] The thermal plasma torch 121 is arranged horizontally, and its ignition end extends into the head of the pyrolysis gasification device 122 to inject a high-temperature plasma jet, such as compressed air or nitrogen, into the pyrolysis gasification device 122. The temperature of the plasma jet can reach over 1200°C.

[0058] A fluidized bed gas supply device 123 is disposed below the pyrolysis gasification device 122 and includes a gas inlet 126 for supplying a gaseous medium, such as air, to the pyrolysis gasification device 122. The gaseous medium and waste particles are mixed in the pyrolysis gasification device 122. The organic combustible components in the waste particles are pyrolyzed and gasified into syngas under the high temperature of the plasma jet, while the inorganic components form molten residue under the high temperature of the plasma jet.

[0059] The fluidized gas supply device 123 has a special orifice plate structure inside, which allows the gas medium delivered to the pyrolysis gasification device 122 to be in a fluidized state. The fluidized gas medium can suspend the waste particles delivered from the crusher 111 to the pyrolysis gasification device 122 in the high-temperature region of the plasma jet of the thermal plasma torch 121, preventing the occurrence of "dead zones" in the pyrolysis gasification device 122. This effectively improves the rate and efficiency of pyrolysis and gasification of the organic combustible components in the waste particles under the high temperature of the plasma jet, increases the calorific value of the syngas, and reduces tar formation.

[0060] It can also relax the requirements for the particle size of waste particles to a certain extent, thereby reducing the requirements for the crusher 111.

[0061] The fluidized gas supply device 123 preferably also includes a slag discharge port 127, and the horizontal thermal plasma ship waste treatment system 100 also includes a molten slag pool 190. The inorganic components in the waste particles, under the high temperature of the plasma jet, form molten residue that can be discharged into the molten slag pool 190 through the slag discharge port 127. The slag discharge port 127 is preferably located at the bottom of the fluidized gas supply device 123 to facilitate the discharge of residue.

[0062] Combustion device 124 is located at the tail end of pyrolysis gasification device 122 and is arranged horizontally. Syngas produced by the pyrolysis and gasification of organic combustible components in waste particles under the high temperature of the plasma jet enters combustion device 124 from pyrolysis gasification device 122 for combustion. To ensure complete combustion of the syngas, a secondary air inlet 128 is preferably provided at the lower part of combustion device 124 to supply air into combustion device 124. A blower can be installed at secondary air inlet 128 to improve the efficiency of air supply into combustion device 124.

[0063] Both the pyrolysis gasification device 122 and the combustion device 124 are made of steel with good thermal conductivity. In order to effectively reduce the thermal stress caused by temperature difference in the pyrolysis gasification device 122 and / or the combustion device 124, effectively increase the rigidity of the pyrolysis gasification device 122 and / or the combustion device 124, and improve the safety of the pyrolysis gasification device 122 and / or the combustion device 124, the pyrolysis gasification device 122 and / or the combustion device 124 preferably include a corrugated structure 180.

[0064] To further ensure the sufficiency of syngas combustion, the plasma pyrolysis gasification combustion device 120 preferably also includes a reburning device 125, which is located at the tail of the combustion device 124. The flue gas generated by the combustion device 124 enters the reburning device 125 for further combustion.

[0065] To recover and utilize the heat generated during syngas combustion, the horizontal thermal plasma ship waste treatment system 100 preferably includes a waste heat recovery device 130. The waste heat recovery device 130 includes a flue gas waste heat recovery unit 131 and a cooling unit 132. Both the flue gas waste heat recovery unit 131 and the cooling unit 132 are arranged horizontally to effectively reduce their occupation of the ship's limited vertical space, and to effectively lower the center of gravity of the horizontal thermal plasma ship waste treatment system 100, enhancing its anti-sway capability and thus effectively improving its efficiency.

[0066] The flue gas waste heat recovery unit 131 is connected to the plasma pyrolysis gasification combustion device 120, and both the flue gas waste heat recovery unit 131 and the plasma pyrolysis gasification combustion device 120 are located in the cooling unit 132, so as to effectively improve the compactness of the horizontal thermal plasma ship waste treatment system 100 and reduce the space occupied by the horizontal thermal plasma ship waste treatment system 100 on the ship.

[0067] The cooling unit 132 is preferably constructed as a fully immersed water-cooled device. Both the flue gas waste heat recovery unit 131 and the plasma pyrolysis gasification combustion device 120 are immersed in the cooling water within the cooling unit 132. This allows the cooling water to fully absorb the heat from the flue gas in the flue gas waste heat recovery unit 131 and the plasma pyrolysis gasification combustion device 120, thereby effectively improving the efficiency of waste heat recovery. Data shows that using a fully immersed water-cooled device in the cooling unit 132 can increase the efficiency of flue gas waste heat recovery to over 90%.

[0068] Specifically, the flue gas waste heat recovery unit 131 includes a high-temperature flue gas waste heat recovery unit 133 and a flue gas rapid cooling waste heat recovery unit 134. The high-temperature flue gas waste heat recovery unit 133 is located between the high-temperature flue gas waste heat recovery unit 133 and the plasma pyrolysis gasification combustion device 120.

[0069] In the illustrated embodiment, the high-temperature flue gas waste heat recovery unit 133 is positioned above the plasma pyrolysis gasification combustion device 120 and arranged horizontally. The flue gas quenching waste heat recovery unit 134 is positioned above the high-temperature flue gas waste heat recovery unit 133 and arranged horizontally. The inlet of the high-temperature flue gas waste heat recovery unit 133 is connected to the outlet of the combustion device 125, and the outlet of the high-temperature flue gas waste heat recovery unit 133 is connected to the inlet of the flue gas quenching waste heat recovery unit 134. After being cooled by the high-temperature flue gas waste heat recovery unit 133, the high-temperature flue gas in the combustion device 125 enters the flue gas quenching waste heat recovery unit 134 for rapid cooling. The flue gas temperature can drop from 500°C to below 199°C within one second, effectively reducing the generation of highly carcinogenic pollutants such as dioxins and furans.

[0070] The horizontal thermal plasma ship waste treatment system 100 also includes a flue gas exhaust device 140, which is connected to a flue gas waste heat recovery unit 131, specifically a flue gas quenching waste heat recovery unit 134, to exhaust the flue gas generated from syngas combustion. The flue gas exhaust device 140 is provided with an exhaust port 141, which can be formed by a component such as an exhaust pipe seat installed on the exhaust device 140. An induced draft fan can be installed at the exhaust port 141 to improve the efficiency of flue gas exhaust.

[0071] To effectively reduce pollutants in flue gas and alleviate environmental pollution, the horizontal thermal plasma ship waste treatment system 100 also includes a denitrification device 150 and a desulfurization device 160. The denitrification device 150 is connected to the tail end of the plasma pyrolysis gasification combustion device 120, specifically to the reburning device 125. The denitrification device 150 can inject urea into the reburning device 125 to react with the flue gas in the reburning device 125 to reduce the nitrogen oxide content in the flue gas.

[0072] The denitrification unit 150 can employ SNCR (selective non-catalytic reduction) technology to effectively reduce denitrification costs while ensuring denitrification efficiency. Data shows that using SNCR technology, the denitrification efficiency can exceed 60%.

[0073] The desulfurization unit 160 is connected to the flue gas exhaust unit 140. The desulfurization unit 160 can spray alkaline solution into the flue gas exhaust unit 140 to perform direct contact desulfurization on the flue gas in the flue gas exhaust unit 140. Data shows that the desulfurization efficiency of this method can reach over 90%.

[0074] The horizontal thermal plasma ship waste treatment system 100 preferably further includes a water supply device 170, the outlet of which is connected to the inlet 135 of the cooling unit 132 to supply cooling water to the cooling unit 132. The inlet 135 is preferably located at the lower part of the cooling unit 132 to facilitate the delivery of cooling water into the cooling unit 132.

[0075] The cooling unit 132 preferably also includes an outlet 139 to discharge hot water from the cooling unit 132 for use in ship heating, hot water supply, or domestic hot water. The outlet 139 may be formed by a component such as an outlet pipe fitting installed to the cooling unit 132.

[0076] To ensure the safety of the cooling unit 132, the cooling unit 132 preferably also includes a vent 136, so that the interior of the cooling unit 132 can be connected to the outside through the vent 136, allowing the gas generated inside the cooling unit 132 to be discharged in a timely manner, thus maintaining the cooling unit 132 at normal pressure. The vent 136 can be located at the top of the cooling unit 132 to facilitate the discharge of gas inside the cooling unit 132.

[0077] To remove scale and other deposits generated within the cooling unit 132 and prevent deterioration of heat transfer in the cooling unit 132, the cooling unit 132 preferably also includes a drain port 138 for periodic drainage of the cooling unit 132. The drain port 138 is preferably located at the bottom of the cooling unit 132 to facilitate the removal of scale and other deposits.

[0078] Preferably, a lifting ring 137 is also provided on the top of the cooling unit 132 to realize the overall hoisting of the cooling unit 132, as well as the flue gas waste heat recovery unit 131 and the plasma pyrolysis gasification combustion device 120 installed inside it, thereby effectively reducing the installation workload of the horizontal thermal plasma ship waste treatment system 100 in the narrow space of the ship.

[0079] Furthermore, the horizontal thermal plasma ship waste treatment system 100 according to the present invention also includes a control device, which may include a control program, enabling control of the operation of the horizontal thermal plasma ship waste treatment system 100. The horizontal thermal plasma ship waste treatment system 100 is also equipped with valves and instruments, etc., and the control device can control the valve opening degree by monitoring the instruments, thereby controlling the operation of the horizontal thermal plasma ship waste treatment system 100.

[0080] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the invention. Terms such as “set” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0081] The present invention has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the present invention to the described embodiments. Those skilled in the art will understand that many variations and modifications can be made based on the teachings of the present invention, and all such variations and modifications fall within the scope of protection claimed by the present invention.

Claims

1. A horizontal thermal plasma ship waste treatment system, characterized in that, The horizontal thermal plasma ship waste treatment system includes: Crushing and conveying equipment; A plasma pyrolysis gasification combustion device is arranged horizontally, located below the crushing and conveying device, and connected to the crushing and conveying device. A waste heat recovery device includes a flue gas waste heat recovery unit and a cooling unit, both arranged horizontally. The flue gas waste heat recovery unit is connected to the plasma pyrolysis gasification combustion device, and both the flue gas waste heat recovery unit and the plasma pyrolysis gasification combustion device are located within the cooling unit. The flue gas waste heat recovery unit includes a high-temperature flue gas waste heat recovery unit and a flue gas quenching waste heat recovery unit. The high-temperature flue gas waste heat recovery unit is vertically arranged between the flue gas quenching waste heat recovery unit and the plasma pyrolysis gasification combustion device. The cooling unit is constructed as a fully immersed water-cooled device, and includes a water outlet to discharge hot water from the cooling unit; and wherein The plasma pyrolysis gasification combustion device includes: Thermal plasma torch; A pyrolysis gasification device is arranged horizontally and connected to the crushing and conveying device. The ignition end of the thermal plasma torch extends into the head of the pyrolysis gasification device to inject a high-temperature plasma jet into the pyrolysis gasification device. A fluidized gas supply device is provided below the pyrolysis gasification device. The fluidized gas supply device includes a gas inlet for supplying a fluidized gas medium into the pyrolysis gasification device. The fluidized gas supply device has an orifice plate structure inside.

2. The horizontal thermal plasma ship waste treatment system according to claim 1, characterized in that, The horizontal thermal plasma ship waste treatment system also includes: A smoke exhaust device, which is connected to the flue gas waste heat recovery unit; A denitrification device, which is connected to the tail end of the plasma pyrolysis gasification combustion device; A desulfurization device, which is connected to the flue gas exhaust device.

3. The horizontal thermal plasma ship waste treatment system according to claim 1, characterized in that, The plasma pyrolysis gasification combustion device further includes: A combustion device is provided at the tail end of the pyrolysis gasification device and is arranged in a horizontal direction; A reburning device is provided at the tail of the combustion device and connected to the denitrification device of the horizontal thermal plasma ship waste treatment system.

4. The horizontal thermal plasma ship waste treatment system according to claim 1, characterized in that, The horizontal thermal plasma ship waste treatment system also includes a water supply device connected to the water inlet of the cooling unit.

5. The horizontal thermal plasma ship waste treatment system according to claim 2, characterized in that, A secondary air inlet is provided at the bottom of the combustion device.

6. The horizontal thermal plasma ship waste treatment system according to claim 3, characterized in that, The fluidized gas supply device also includes a slag discharge port, which is located at the bottom of the fluidized gas supply device.

7. The horizontal thermal plasma ship waste treatment system according to claim 3, characterized in that, The pyrolysis gasification device and / or the combustion device include a corrugated structure.

8. The horizontal thermal plasma ship waste treatment system according to any one of claims 1-7, characterized in that, The cooling unit includes a vent, through which it communicates with the outside world.

9. The horizontal thermal plasma ship waste treatment system according to any one of claims 1-7, characterized in that, The cooling unit includes a lifting ring and a drain outlet. The lifting ring is located at the top of the cooling unit, and the drain outlet is located at the bottom of the cooling unit.

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