Novel wastewater light component removal tower structure

Abstract

The utility model discloses a novel wastewater light component removal tower structure which comprises a light component removal tower, the bottom end of the light component removal tower is connected with a reboiler, the light component removal tower is in the shape of a cylindrical tank, the light component removal tower is formed by sequentially connecting a top shell, an adsorption shell, a plurality of slow flow shells and a bottom shell from top to bottom, the top shell is in the shape of a cylindrical shell with an opening in the bottom end, and the adsorption shell is connected with the slow flow shells. The adsorption shell and the flow slowing shells are each in a cylindrical shell shape with openings in the upper end and the lower end, and the bottom shell is in a cylindrical shell shape with an opening in the top end. The edge of the bottom end of the top shell, the edges of the two axial ends of the adsorption shell, the edges of the two axial ends of the slow flow shell and the edge of the top end of the bottom shell are all provided with connecting flanges and are in bolt connection through the connecting flanges. An adsorption assembly is arranged in the adsorption shell, and a flow guide part is arranged below the adsorption assembly; a plurality of blocking pieces are arranged in the flow slowing shell and arranged at equal intervals in the axis direction of the flow slowing shell.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, and in particular to a novel wastewater light-weight removal tower structure. Background Technology

[0002] Wastewater light component removal towers mainly utilize the property that the components in organic solvent wastewater have different volatility, i.e., different vapor pressures at the same temperature. This allows the light components in the liquid phase to transfer to the gas phase, while the heavy components in the gas phase transfer to the liquid phase, thereby achieving the purpose of separation.

[0003] Patent No. ZL202323263996.9 discloses a wastewater light component removal system, which can effectively remove light components from wastewater through a light component removal tower. However, during use, it was found that the light component removal tower is an integral structure with a large volume, which makes transportation and installation time-consuming and labor-intensive, affecting the effectiveness of the light component removal tower. At the same time, although its light component removal effect has been improved to a certain extent, there is still room for further improvement. Therefore, it is necessary to study a new type of wastewater light component removal tower structure to improve it. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a novel wastewater light-weight removal tower structure that is easy to assemble and improves the light-weight removal effect of wastewater.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A novel wastewater light-light emission removal tower structure includes a light-light emission removal tower connected to a reboiler at its bottom. The light-light emission removal tower is cylindrical and consists of a top shell, an adsorption shell, several slow-flow shells, and a bottom shell connected sequentially from top to bottom. The top shell is a cylindrical shell with an open bottom, the adsorption shell and the several slow-flow shells are all cylindrical shells with open top and bottom ends, and the bottom shell is a cylindrical shell with an open top end. Connecting flanges are provided at the bottom edge of the top shell, the axial edges of the adsorption shell, the axial edges of the slow-flow shell, and the top edge of the bottom shell, and are bolted together. An adsorption assembly is provided inside the adsorption shell, and a flow guide is provided below the adsorption assembly. Several blocking components are provided inside the slow-flow shell, and the blocking components are evenly spaced along the axial direction of the slow-flow shell.

[0007] Furthermore, the adsorption assembly includes a uniform distribution plate and a support plate, both of which are disposed within the adsorption shell, with the support plate located below the uniform distribution plate. The edges of the uniform distribution plate and the support plate are fixedly connected to the inner wall of the adsorption shell. The uniform distribution plate has a plurality of longitudinally penetrating water flow holes evenly arranged therethrough, and the support plate has a plurality of longitudinally penetrating water permeable holes evenly arranged therethrough, with a filter screen fixedly connected inside the water permeable holes. Activated carbon granules are disposed above the support plate, and the activated carbon granules are piled on the support plate.

[0008] Furthermore, the support plate is inclined, and the side wall of the adsorption shell is provided with a discharge port and a feed port. The discharge port is located above the lower end of the support plate, and a discharge plug is provided inside the discharge port to control the opening and closing state of the discharge port. The feed port is located between the discharge port and the uniform distribution plate, and a feed plug is provided in the feed port to control the opening and closing state of the feed port.

[0009] Furthermore, the flow guide is a spherical panel with a high center and low edges. The flow guide is provided with a mounting bracket and is fixedly connected to the inner wall of the adsorption shell through the mounting bracket. The flow guide and the adsorption shell are coaxially arranged. A flow guide gap is provided between the bottom edge of the flow guide and the inner wall of the adsorption shell. The width of the flow guide gap is smaller than the outer diameter of the water droplet.

[0010] Furthermore, the bottom end of the adsorption shell is provided with an outwardly inclined conical expansion portion, which is located below the flow guide.

[0011] Furthermore, the top of the top shell is provided with an exhaust port, which is connected to the collection tank pipeline through a condenser; the side wall of the top shell is provided with a liquid inlet and a cleaning port, the liquid inlet is connected to the wastewater tank pipeline, and the cleaning port is connected to the external cleaning pipeline.

[0012] Furthermore, the plurality of slow-flow shells are stacked sequentially from top to bottom. The top of the top slow-flow shell is connected to the bottom of the adsorption shell by connecting flange bolts. Adjacent slow-flow shells are connected by connecting flange bolts. The bottom of the bottom slow-flow shell is connected to the top of the bottom shell by connecting flange bolts. A nitrogen port is provided on the side wall of the slow-flow shell, and the nitrogen port is connected to a nitrogen pipeline.

[0013] Furthermore, the blocking component includes a base plate and a guide plate. One end of the base plate is fixedly connected to the inner wall of the flow-slowing shell, and a gap is provided between the other end of the base plate and the inner wall of the flow-slowing shell. The guide plate is longitudinally arranged within the gap. One side of the top of the guide plate is fixedly connected to the end of the base plate near the gap, and the height of the top of the guide plate is higher than the end face height of the base plate. The upper end of the guide plate is vertically arranged, and the bottom end of the guide plate is inclined, tilting away from the base plate. A buffer groove is provided at the end of the base plate away from the gap.

[0014] Furthermore, among the plurality of blocking members, the gaps between adjacent blocking members located at one end of the base plate are staggered; among adjacent blocking members, the bottom end of the guide plate of the upper blocking member extends into the buffer groove of the lower blocking member, and a water flow gap is provided between the bottom end of the guide plate of the upper blocking member and the bottom end of the buffer groove of the lower blocking member.

[0015] Furthermore, the top of the bottom shell is connected to the slow-flow shell, and the bottom of the bottom shell is fixedly connected to the ground by a support frame. A steam inlet is provided on one side of the top of the bottom shell, and the steam inlet is connected to the steam outlet pipe provided at the top of the reboiler. An overflow port is provided on the other side of the top of the bottom shell, and the overflow port is located below the steam inlet. A liquid outlet is provided at the bottom of the bottom shell. Both the overflow port and the liquid outlet are connected to the heating port pipe provided on one side of the bottom of the reboiler. A heating element for heating the liquid is provided inside the reboiler, and a drain port for discharging the liquid is provided at the bottom of the reboiler.

[0016] Compared with the prior art, the advantages and positive effects of this utility model are:

[0017] In wastewater treatment, this invention first introduces a light component removal tower into a reboiler. The reboiler heats the wastewater, and the resulting steam and light component mixture enter the light component removal tower through the steam inlet. The steam is then discharged as condensate from the exhaust port at the top of the tower, thus completing the treatment of the light component mixture in the wastewater. The light component removal tower is constructed from top to bottom, consisting of a top shell, an adsorption shell, several slow-flow shells, and a bottom shell. The tower is disassembled using a connecting flange assembly structure, saving time and effort during transportation and installation, and improving its performance.

[0018] On the other hand, the light component removal tower in this invention adds an adsorption shell and adsorption components to the existing technology. This allows steam to pass through activated carbon granules piled on the support plate as it exits the tower. The activated carbon granules adsorb the light component mixture in the steam to a certain extent. Furthermore, wastewater entering the tower from the wastewater tank passes through the activated carbon granules and falls to the bottom of the tower. The wetted activated carbon granules prolong the time it takes for steam to pass through them, thus extending the adsorption time of the light component mixture and further improving the light component removal effect. At the same time, the prolonged contact between the wastewater and steam in the activated carbon granules effectively improves the preheating effect of the wastewater, thereby effectively improving the heating efficiency of the wastewater, reducing the energy consumption of the reboiler and the operating cost of wastewater treatment, and further improving the effectiveness of this invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the light tower.

[0022] Figure 3 This is a cross-sectional view of the connection structure between the top shell and the adsorption shell;

[0023] Figure 4 This is a partial structural cross-sectional view of the slow-flow shell. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art to all other embodiments obtained without creative effort should be included within the protection scope of the present utility model.

[0025] like Figures 1 to 4 As shown, this embodiment discloses a novel wastewater light-light-removal tower structure, including a light-light-removal tower 2, the bottom of which is connected to a reboiler 1;

[0026] The light-light removal tower 2 is in the shape of a cylindrical tank. The light-light removal tower 2 is composed of a top shell 21, an adsorption shell 22, several slow-flow shells 23, and a bottom shell 24 connected from top to bottom. The top shell 21 is a cylindrical shell with an open bottom. The adsorption shell 22 and several slow-flow shells 23 are all cylindrical shells with open top and bottom ends. The bottom shell 24 is a cylindrical shell with an open top. The bottom edge of the top shell 21, the axial edges of the adsorption shell 22, the axial edges of the slow-flow shells 23, and the top edge of the bottom shell 24 are all provided with connecting flanges 214 and bolted together.

[0027] The top of the top shell 21 is provided with an exhaust port 211, which is connected to the collection tank pipeline through a condenser; the side wall of the top shell 21 is provided with a liquid inlet 212 and a cleaning port 213, the liquid inlet 212 is connected to the wastewater tank pipeline, and the cleaning port 213 is connected to the external cleaning pipeline.

[0028] An adsorption assembly is provided inside the adsorption housing 22, and a flow guide 29 is provided below the adsorption assembly;

[0029] The adsorption assembly includes a uniform distribution plate 27 and a support plate 28. Both the uniform distribution plate 27 and the support plate 28 are disposed inside the adsorption shell 22, with the support plate 28 located below the uniform distribution plate 27. The edges of the uniform distribution plate 27 and the support plate 28 are fixedly connected to the inner wall of the adsorption shell 22. The uniform distribution plate 27 has a plurality of longitudinally penetrating water holes 271 evenly arranged on it, and the support plate 28 has a plurality of longitudinally penetrating water permeable holes evenly arranged on it. A filter screen 281 is fixedly connected inside the water permeable holes. Activated carbon granules 225 are disposed above the support plate 28 and are piled up on the support plate 28.

[0030] After the wastewater enters the light component removal tower through the inlet, it is dispersed by the uniform distribution plate and enters the activated carbon granules through the water flow holes. After passing through the filter screen again, it falls onto the guide component below, which achieves uniform wetting of the activated carbon granules. At the same time, the water flows slowly into the bottom of the light component removal tower, achieving an initial slow flow effect of wastewater. Furthermore, the wetted activated carbon granules come into contact with the upward-moving steam and adsorb the light component mixture in the steam, improving the light component removal effect of the wastewater.

[0031] The support plate 28 is inclined. The side wall of the adsorption shell 22 is provided with a discharge port 221 and a feed port 223. The discharge port 221 is located above the lower end of the support plate 28. A discharge plug 222 is provided inside the discharge port 221 to control the opening and closing state of the discharge port 221. The feed port 223 is located between the discharge port 221 and the uniform distribution plate 27. A feed plug 224 is provided in the feed port 223 to control the opening and closing state of the feed port 223.

[0032] The inclined design of the support plate facilitates the removal of activated carbon granules that have been used for adsorption for a long time. When replacing activated carbon granules, the outlet plug can be opened directly to allow the activated carbon granules to flow out, and then new activated carbon granules can be added to the inlet. Its simple structure and convenient operation further improve the effectiveness of this invention.

[0033] The flow guide 29 is a spherical panel with a high center and low edges. A mounting bracket 291 is provided on the flow guide 29 and is fixedly connected to the inner wall of the adsorption shell 22 through the mounting bracket 291. The flow guide 29 and the adsorption shell 22 are coaxially arranged. A flow guide gap 292 is provided between the bottom edge of the flow guide 29 and the inner wall of the adsorption shell. The width of the flow guide gap 292 is smaller than the outer diameter of the water droplet.

[0034] The bottom end of the adsorption shell 22 is provided with a tapered expansion portion 226 that is inclined outward, and the tapered expansion portion 226 is located below the flow guide 29.

[0035] The guide vane directs the water entering the light-light ...

[0036] The plurality of slow-flow shells 23 are stacked sequentially from top to bottom. The top of the top slow-flow shell 23 is connected to the bottom of the adsorption shell 22 by bolts through connecting flanges 214. Adjacent slow-flow shells 23 are connected to each other by bolts through connecting flanges 214. The bottom of the bottom slow-flow shell 23 is connected to the top of the bottom shell 24 by bolts through connecting flanges 214. A nitrogen port 231 is provided on the side wall of the slow-flow shell 23. The nitrogen port 231 is connected to a nitrogen pipeline. During the light-light removal operation, nitrogen needs to be supplied into the light-light removal tower through the nitrogen port 231 to replace the air inside the light-light removal tower and achieve a safety protection effect.

[0037] The slow-flow housing 23 is provided with a plurality of blocking elements 26, which are arranged at equal intervals along the axial direction of the slow-flow housing 23.

[0038] The blocking member 26 includes a base plate 261 and a guide plate 262. The base plate 261 is horizontally disposed inside the flow-retarding housing 23. One end of the base plate 261 is fixedly connected to the inner wall of the flow-retarding housing 23, and a gap 264 is provided between the other end of the base plate 261 and the inner wall of the flow-retarding housing 23. The guide plate 262 is longitudinally disposed within the gap 264. One side of the top of the guide plate 262 is fixedly connected to the end of the base plate 261 near the gap 264, and the top height of the guide plate 262 is higher than the end face height of the base plate 261. The upper end of the guide plate 262 is vertically disposed, and the bottom end of the guide plate 262 is inclined, with the bottom end of the guide plate 262 inclined away from the base plate 261. A buffer groove 263 is provided at the end of the base plate 261 away from the gap 264.

[0039] Among the plurality of blocking members 26, the gaps 264 between adjacent blocking members 26 located at one end of the base plate 261 are staggered; among adjacent blocking members 26, the bottom end of the guide plate 262 of the upper blocking member extends into the buffer groove 263 of the lower blocking member, and a water flow gap 265 is provided between the bottom end of the guide plate 262 of the upper blocking member and the bottom end of the buffer groove 263 of the lower blocking member.

[0040] The steam generated in the reboiler rises in the light-weight removal tower. When the high-temperature steam comes into contact with the wastewater entering the light-weight removal tower, it will raise the temperature of the wastewater. The design of the baffle can effectively extend the contact time and contact area between the high-temperature steam and the wastewater, thereby further increasing the temperature of the wastewater, reducing the heating time of the wastewater in the reboiler, increasing the light-weight removal rate of the wastewater, and further reducing the operating energy consumption of the reboiler.

[0041] As the wastewater falls from the baffle, it first falls into the buffer groove of the bottom plate, then slowly overflows from the buffer groove after passing through the water flow gap, and flows along the bottom plate towards the interval gap. When the overflow height is higher than the top height of the guide plate, it flows down the guide plate and into the buffer groove of the next baffle. This process is repeated until it falls into the bottom shell of the light-light removal tower. This effectively slows down the flow speed of the wastewater in the light-light removal tower, increases the contact time and contact area between the wastewater and the high-temperature steam, improves the temperature rise effect of the wastewater, and thus further improves the light-light removal efficiency of the wastewater.

[0042] The top of the bottom shell 24 is connected to the bottom end 23 of the lowest slow-flow shell. The bottom end of the bottom shell 24 is fixedly connected to the ground by a support frame 25. A steam inlet 242 is provided on one side of the top of the bottom shell 24, and the steam inlet 242 is connected to the steam outlet 102 pipe provided at the top of the reboiler 1. An overflow port 243 for limiting the height of wastewater in the light-duty removal tower is provided on the other side of the top of the bottom shell 24. The overflow port 243 is located below the steam inlet 242. A liquid outlet 241 is provided at the bottom of the bottom shell 24. Both the overflow port 243 and the liquid outlet 241 are connected to the heating port 101 pipe provided on one side of the bottom of the reboiler 1. A heating element for heating the liquid is provided inside the reboiler 1. A drain port 103 for discharging the liquid is provided at the bottom of the reboiler 1.

[0043] The liquid inlet and cleaning port on the top shell, the nitrogen port on the buffer shell, the liquid outlet on the bottom shell, and the liquid drain port on the reboiler are all equipped with control valves to control their opening and closing status. At the same time, a water pump is installed on the pipeline between the liquid outlet and the reboiler to realize the power transmission of wastewater.

[0044] Wastewater enters the light component removal tower from the wastewater tank, and then enters the reboiler through the liquid outlet at the bottom of the bottom shell. Under the action of the heating element of the reboiler, steam and the mixture of light components enter the steam inlet of the light component removal tower from the steam outlet at the top of the reboiler. Part of the steam condenses and flows back after contacting the inner wall of the light component removal tower, while the other part of the steam is discharged from the exhaust port at the top of the top shell and condensed and recovered. By repeating the above operation, the wastewater is circulated and heated, and the light component mixture in the wastewater is treated. Finally, the treated wastewater that meets the standards is discharged from the liquid outlet at the bottom of the light component removal tower or the liquid outlet at the bottom of the reboiler.

[0045] In wastewater treatment, this invention first introduces a light component removal tower into a reboiler. The reboiler heats the wastewater, and the resulting steam and light component mixture enter the light component removal tower through the steam inlet. The steam is then discharged as condensate from the exhaust port at the top of the tower, thus completing the treatment of the light component mixture in the wastewater. The light component removal tower is constructed from top to bottom, consisting of a top shell, an adsorption shell, several slow-flow shells, and a bottom shell. The tower is disassembled using a connecting flange assembly structure, saving time and effort during transportation and installation, and improving its performance.

[0046] On the other hand, the light component removal tower in this invention adds an adsorption shell and adsorption components to the existing technology. This allows steam to pass through activated carbon granules piled on the support plate as it exits the tower. The activated carbon granules adsorb the light component mixture in the steam to a certain extent. Furthermore, wastewater entering the tower from the wastewater tank passes through the activated carbon granules and falls to the bottom of the tower. The wetted activated carbon granules prolong the time it takes for steam to pass through them, thus extending the adsorption time of the light component mixture and further improving the light component removal effect. At the same time, the prolonged contact between the wastewater and steam in the activated carbon granules effectively improves the preheating effect of the wastewater, thereby effectively improving the heating efficiency of the wastewater, reducing the energy consumption of the reboiler and the operating cost of wastewater treatment, and further improving the effectiveness of this invention.

Claims

1. A novel wastewater light-light emission removal tower structure, comprising a light-light emission removal tower, the bottom end of which is connected to a reboiler, characterized in that: The light-weight removal tower is shaped like a cylindrical tank and consists of a top shell, an adsorption shell, several slow-flow shells, and a bottom shell connected sequentially from top to bottom. The top shell is a cylindrical shell with an open bottom, the adsorption shell and several slow-flow shells are all cylindrical shells with open top and bottom ends, and the bottom shell is a cylindrical shell with an open top end. The bottom edge of the top shell, the axial edges of the adsorption shell, the axial edges of the slow-flow shell, and the top edge of the bottom shell are all provided with connecting flanges and are bolted together. An adsorption assembly is provided inside the adsorption shell, and a flow guide is provided below the adsorption assembly. Several blocking components are provided inside the slow-flow shell, and the blocking components are evenly spaced along the axial direction of the slow-flow shell.

2. The novel wastewater light metal removal tower structure as described in claim 1, characterized in that: The adsorption assembly includes a uniform distribution plate and a support plate, both of which are disposed inside the adsorption shell, with the support plate located below the uniform distribution plate. The edges of the uniform distribution plate and the support plate are fixedly connected to the inner wall of the adsorption shell. The uniform distribution plate has a plurality of longitudinally penetrating water flow holes evenly arranged therethrough, and the support plate has a plurality of longitudinally penetrating water permeable holes evenly arranged therethrough. A filter screen is fixedly connected inside the water permeable holes. Activated carbon granules are disposed above the support plate and are piled on the support plate.

3. The novel wastewater light-weight wastewater removal tower structure as described in claim 2, characterized in that: The support plate is inclined, and the side wall of the adsorption shell is provided with a discharge port and a feed port. The discharge port is located above the lower end of the support plate, and a discharge plug is provided inside the discharge port to control the opening and closing state of the discharge port. The feed port is located between the discharge port and the uniform distribution plate, and a feed plug is provided in the feed port to control the opening and closing state of the feed port.

4. The novel wastewater light-weight wastewater removal tower structure as described in claim 3, characterized in that: The flow guide is a spherical panel with a high center and low edges. A mounting bracket is provided on the flow guide and it is fixedly connected to the inner wall of the adsorption shell through the mounting bracket. The flow guide and the adsorption shell are coaxially arranged. A flow guide gap is provided between the bottom edge of the flow guide and the inner wall of the adsorption shell. The width of the flow guide gap is smaller than the outer diameter of the water droplet.

5. The novel wastewater light-weight wastewater removal tower structure as described in claim 4, characterized in that: The bottom end of the adsorption shell is provided with an outwardly inclined conical expansion section, which is located below the flow guide.

6. The novel wastewater light metal removal tower structure as described in claim 1, characterized in that: The top of the top shell is provided with an exhaust port, which is connected to the collection tank pipeline through a condenser; the side wall of the top shell is provided with a liquid inlet and a cleaning port, the liquid inlet is connected to the wastewater tank pipeline, and the cleaning port is connected to the external cleaning pipeline.

7. The novel wastewater light-weight wastewater removal tower structure as described in claim 1, characterized in that: The plurality of slow-flow shells are stacked sequentially from top to bottom. The top of the top slow-flow shell is connected to the bottom of the adsorption shell by connecting flange bolts. Adjacent slow-flow shells are connected by connecting flange bolts. The bottom of the bottom slow-flow shell is connected to the top of the bottom shell by connecting flange bolts. A nitrogen port is provided on the side wall of the slow-flow shell, and the nitrogen port is connected to a nitrogen pipeline.

8. The novel wastewater light-weight wastewater removal tower structure as described in claim 1, characterized in that: The blocking component includes a base plate and a guide plate. One end of the base plate is fixedly connected to the inner wall of the flow-slowing shell, and a gap is provided between the other end of the base plate and the inner wall of the flow-slowing shell. The guide plate is longitudinally arranged in the gap. One side of the top of the guide plate is fixedly connected to the end of the base plate near the gap, and the height of the top of the guide plate is higher than the end face height of the base plate. The upper end of the guide plate is vertically arranged, and the bottom end of the guide plate is inclined and tilted away from the base plate. A buffer groove is provided at the end of the base plate away from the gap.

9. The novel wastewater light metal removal tower structure as described in claim 8, characterized in that: Among the plurality of blocking components, the gaps between adjacent blocking components located at one end of the base plate are staggered; among adjacent blocking components, the bottom end of the guide plate of the upper blocking component extends into the buffer groove of the lower blocking component, and a water flow gap is provided between the bottom end of the guide plate of the upper blocking component and the bottom end of the buffer groove of the lower blocking component.

10. The novel wastewater light-weight wastewater removal tower structure as described in claim 1, characterized in that: The top of the bottom shell is connected to the slow-flow shell, and the bottom of the bottom shell is fixed to the ground by a support frame. A steam inlet is provided on one side of the top of the bottom shell, and the steam inlet is connected to the steam outlet pipe provided at the top of the reboiler. An overflow port is provided on the other side of the top of the bottom shell, and the overflow port is located below the steam inlet. A liquid outlet is provided at the bottom of the bottom shell. Both the overflow port and the liquid outlet are connected to the heating port pipe provided on one side of the bottom of the reboiler. The reboiler is equipped with a heating element for heating the liquid, and a drain port for discharging the liquid is provided at the bottom of the reboiler.

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