Energy-saving pre-polycondensation tower

Abstract

The invention discloses an energy-saving pre-polycondensation tower, and relates to the technical field of chemical equipment, the energy-saving pre-polycondensation tower comprises a cylinder body, a tower tray and a gas collecting pipe, the tower tray and the gas collecting pipe are arranged in the cylinder body, and a heating medium for heating materials circulates in the cylinder wall of the cylinder body; the cylinder body comprises an upper cylinder body and a lower cylinder body which are connected, and a pre-polycondensation chamber is formed between the upper cylinder body and the lower cylinder body; a preheating chamber for preheating materials is arranged in the upper cylinder body, and a coil heating device is arranged in the preheating chamber; the tower tray is provided with multiple layers and comprises an upper tower tray and a lower tower tray which are oppositely arranged; a blanking pipe penetrating through the upper and lower surfaces of the upper tray is arranged in the center of the upper tray; a second blanking channel is formed between the gas collecting pipe and the blanking pipe; the gas collecting pipe is connected with a heating medium input port of the coil heating device; the gas collecting pipe can heat the materials through hot gas circulating in the gas collecting pipe when the materials flow through the second blanking channel and make contact with the outer wall of the gas outlet pipe. The device has the effects of reducing the heat loss of the tower body, improving the heating efficiency and reducing the energy consumption.

Description

Technical Field

[0001] The present application relates to the technical field of chemical equipment, and in particular to an energy-saving precondensation tower. Background Art

[0002] Precondensation is an important process in polyester synthesis. Precondensation is a transition process from the esterification stage to the final polycondensation. It is the intermediate link of the whole process. Its main task is to precondense the esterified product after the reaction flowing through the esterification reactor to meet the technical index requirements, thereby ensuring that the final polycondensation reactor produces qualified products.

[0003] In the related art, for example, a Chinese patent with announcement number CN116351327A discloses a vertical integrated reaction device and method for continuous synthesis of polyamide, wherein the device comprises a concentrating distillation tower and a vertical polycondensation reaction tower; the vertical polycondensation reaction tower comprises a central circulation reactor, a first multi-stage tray reactor and a second multi-stage tray reactor connected in sequence from top to bottom; after the polyamide salt solution is concentrated in the concentrating distillation tower, it enters the central circulation reactor for polycondensation, and the generated polyamide product is discharged from the conical bottom of the central circulation reactor, enters the first multi-stage tray reactor to continue the polycondensation reaction, and obtains the polyamide product through the bottom of the second multi-stage tray reactor.

[0004] With regard to the above-mentioned related technologies, there is a defect that the heat loss of the tower body is large when heating materials, resulting in low heating efficiency and high energy consumption. Summary of the invention

[0005] In order to reduce heat loss from the tower body, improve heating efficiency and reduce energy consumption, the present application provides an energy-saving precondensation tower.

[0006] The energy-saving precondensation tower provided in this application adopts the following technical solution: An energy-saving precondensation tower, comprising: A cylinder, wherein a heating medium for heating materials flows in the cylinder wall of the cylinder; the cylinder comprises an upper cylinder and a lower cylinder, wherein the upper cylinder and the lower cylinder are connected and a pre-condensation chamber is formed between the upper cylinder and the lower cylinder; a pre-heating chamber for pre-heating materials is arranged in the upper cylinder, and the on-off and flow rate between the pre-heating chamber and the pre-condensation chamber are controlled by a control valve, and a coil heating device is arranged in the pre-heating chamber; A tower plate is arranged in the lower cylinder, and the tower plate is provided with multiple layers along the height direction at a preset spacing; the tower plate comprises an upper tower plate and a lower tower plate, the outer edge of the upper tower plate is sealed and connected to the inner wall of the lower cylinder, the lower tower plate is arranged opposite to the upper tower plate, and a first material dropping channel is formed between the lower tower plate and the inner wall of the lower cylinder; a material dropping pipe is provided at the center of the upper tower plate, which passes through the upper and lower surfaces of the upper tower plate and is connected to the lower tower plate, and the material dropping pipe and the first material dropping channel can allow the material on the upper tower plate to flow from the material dropping pipe to the lower tower plate and then flow from the first material dropping channel to the upper tower plate of the next layer; The gas collecting pipe is arranged in the lower cylinder, and the gas collecting pipe runs through the multiple layers of lower tower plates and the dropping pipes of the multiple layers of upper tower plates, and a second dropping channel for materials to flow through is formed between the gas collecting pipe and the dropping pipe; one end of the gas collecting pipe extends to the bottom surface of the lowest tower plate, and the other end is connected to the heat medium input port of the coil heating device; the gas collecting pipe is provided with a plurality of vents connecting the pre-condensation chamber and the inner cavity of the gas collecting pipe for discharging the hot air in the pre-condensation chamber; the gas collecting pipe can heat the material by using the hot air flowing in the gas collecting pipe when the material flows through the second dropping channel and contacts the outer wall of the outlet pipe.

[0007] By adopting the above technical scheme, the energy-saving precondensation tower can effectively improve the heating efficiency and heat utilization rate of the material; specifically, the design of the gas collecting pipe can not only enable the hot air generated by the heating of the material in the precondensation chamber to be effectively discharged through the gas collecting pipe, but also can further perform secondary heating on the material flowing through the second material dropping channel, thereby improving energy utilization rate and reducing energy consumption; by setting a preheating chamber in the upper cylinder and equipping it with a coil heating device, connecting the gas collecting pipe with the input port of the coil heating device, and using the hot air in the gas collecting pipe to preheat the material, the material can be fully preheated before entering the precondensation chamber, thereby shortening the time of the entire process; the flow rate of the material entering the precondensation chamber is accurately regulated by the control valve; at the same time, the design of the multi-layer tower plate enables the material to be evenly dispersed among the various levels and fall step by step, so that the material can fully react in the precondensation chamber.

[0008] Optionally, the upper cylinder includes a first inner cylinder and a first jacket, the first jacket is arranged outside the first inner cylinder to form a first heating chamber between the inner wall of the first jacket and the outer wall of the first inner cylinder, the first inner cylinder is provided with a spiral first guide plate along its outer wall to divide the first heating chamber into a spiral shape, and the upper cylinder is located at both ends of the first heating chamber and is respectively provided with a first heating medium input port and a first heating medium output port connected to the first heating chamber.

[0009] By adopting the above technical solution, the upper cylinder design of the precondensation tower enables the heating medium to flow along the spiral first guide plate, thereby increasing the heat exchange area and heat exchange time between the heating medium and the first inner cylinder, and improving the heat transfer efficiency; this structure not only ensures that the material is evenly heated in the preheating chamber, but also effectively reduces energy consumption and improves the energy efficiency of the system; at the same time, the heating medium input and output ports arranged at both ends of the first heating chamber ensure the continuous circulation of the heating medium, further enhancing the stability and reliability of the heating effect.

[0010] Optionally, the lower cylinder includes a second inner cylinder and a second jacket, the second jacket is arranged outside the second inner cylinder to form a second heating chamber between the inner wall of the second jacket and the outer wall of the second inner cylinder, the second inner cylinder is provided with a spiral second guide plate along its outer wall to divide the second heating chamber into a spiral shape, and the lower cylinder is provided with a second heating medium input port and a second heating medium output port connected to the second heating chamber at both ends of the second heating chamber.

[0011] By adopting the above technical solution, the lower cylinder design of the precondensation tower enables the heating medium to flow along the spiral second guide plate, thereby increasing the heat exchange area and heat exchange time between the heating medium and the second inner cylinder, and improving the heat transfer efficiency; this structure not only ensures that the material is evenly heated in the preheating chamber, but also effectively reduces energy consumption and improves the energy efficiency of the system; at the same time, the heating medium input and output ports arranged at both ends of the first heating chamber ensure the continuous circulation of the heating medium, further enhancing the stability and reliability of the heating effect.

[0012] Optionally, one end of the first guide plate facing away from the first inner cylinder is infinitely close to the inner wall of the first jacket but does not contact the inner wall of the first jacket; one end of the second guide plate facing away from the second inner cylinder is infinitely close to the inner wall of the second jacket but does not contact the inner wall of the second jacket.

[0013] By adopting the above technical solution, the heat loss between the first guide plate and the first jacket and between the second guide plate and the second jacket can be effectively reduced, ensuring that the heat transfer of the heating medium during the flow process is more uniform and efficient, thereby improving the working efficiency and energy utilization of the entire precondensation tower.

[0014] Optionally, a first feed pipe and a first discharge pipe connected to the preheating chamber are provided on the wall of the upper cylinder, a second feed pipe and a second discharge pipe connected to the precondensation chamber are provided on the wall of the lower cylinder, one end of the control valve is connected to the first discharge pipe, and the other end is connected to the second feed pipe.

[0015] By adopting the above technical scheme, the material flow control between the preheating chamber and the precondensation chamber can be achieved, ensuring that the material has been fully preheated before entering the precondensation chamber, thereby improving the efficiency and energy utilization of the precondensation process; at the same time, through the setting of the control valve, the flow rate and residence time of the material can be flexibly adjusted, thereby optimizing the reaction conditions and improving the quality and output of the product.

[0016] Optionally, the first discharge pipe includes a first inner tube and a first outer tube, one end of the first inner tube is connected to the first inner cylinder and connected to the preheating chamber, and the other end extends to the outside of the first jacket; the first outer tube is sleeved on the outside of the first inner tube, and one end of the first outer tube is fixed on the first jacket, and the other end is sealed and connected to the end of the first inner tube away from the first inner cylinder to form a first insulation chamber connected to the first heating chamber between the first inner tube and the first outer tube.

[0017] By adopting the above technical solution, the design of the first discharge pipe can effectively reduce heat loss; specifically, the first insulation chamber between the first inner tube and the first outer tube is connected to the first heating chamber, ensuring that the material in the preheating chamber can still maintain a high temperature during the transportation process, thereby improving the energy utilization efficiency of the entire system, thereby achieving energy saving effects; at the same time, this design also ensures the continuity and stability of the material, avoiding process problems caused by temperature fluctuations.

[0018] Optionally, the second feed pipe includes a second inner tube and a second outer tube, one end of the second inner tube is connected to the second inner cylinder and connected to the pre-condensation chamber, and the other end extends to the outside of the second jacket; the second outer tube is sleeved on the outside of the second inner tube, and one end of the second outer tube is fixed on the second jacket, and the other end is sealed and connected to one end of the second inner tube away from the second inner cylinder to form a second insulation chamber connected to the second heating chamber between the second inner tube and the second outer tube.

[0019] By adopting the above technical solution, the design of the second discharge pipe can effectively reduce heat loss; specifically, the second insulation chamber between the second inner tube and the second outer tube is connected to the second heating chamber, ensuring that the material transported from the preheating chamber can still maintain a high temperature during the transportation process, thereby improving the energy utilization efficiency of the entire system, thereby achieving energy saving effects; at the same time, this design also ensures the continuity and stability of the material, avoiding process problems caused by temperature fluctuations.

[0020] Optionally, the blanking pipe is provided with a spiral third guide plate along its inner wall to divide the second blanking channel into a spiral shape.

[0021] By adopting the above technical solution, the material in the blanking pipe flows downward along the spiral path under the action of the spiral third guide plate, which increases the residence time and heat exchange area of ​​the material in the second blanking channel and improves the heating efficiency and uniformity of the material.

[0022] Optionally, the ventilation holes are all located on a side of the lower tower tray away from the upper tower tray of the same layer and are higher than an upper end pipe opening of an upper material drop pipe of the lower tower tray.

[0023] By adopting the above technical solution, the position design of the vent hole can ensure that the gas generated during the precondensation process in the precondensation chamber is smoothly discharged into the gas collecting pipe, while also preventing the vent hole from being blocked by materials to the greatest extent.

[0024] Optionally, a plurality of blisters are provided on the surface of the upper tray and the lower tray for receiving materials.

[0025] By adopting the above technical solution, the contact area between the material and the heating medium can be effectively increased, the heat transfer efficiency can be improved, thereby accelerating the preheating process of the material and improving the working efficiency of the precondensation tower.

[0026] In summary, this application includes the following beneficial technical effects: 1. The energy-saving precondensation tower can effectively improve the heating efficiency and heat utilization rate of the material; specifically, the design of the gas collecting pipe can not only effectively discharge the hot air generated by the material heating in the precondensation chamber through the gas collecting pipe, but also further perform secondary heating on the material flowing through the second material dropping channel, thereby improving the energy utilization rate and reducing energy consumption; by arranging a preheating chamber in the upper cylinder and equipping it with a coil heating device, connecting the gas collecting pipe with the input port of the coil heating device, and using the hot air in the gas collecting pipe to preheat the material, the material can be fully preheated before entering the precondensation chamber, thereby shortening the time of the entire process; the flow rate of the material entering the precondensation chamber is accurately controlled by the control valve; at the same time, the design of the multi-layer tower tray allows the material to be evenly dispersed between each layer and fall step by step, so that the material can fully react in the precondensation chamber; 2. By adopting the above technical solution, the upper cylinder of the precondensation tower is designed so that the heating medium can flow along the spiral first guide plate, thereby increasing the heat exchange area and heat exchange time between the heating medium and the first inner cylinder, and improving the heat transfer efficiency; this structure not only ensures that the material is evenly heated in the preheating chamber, but also effectively reduces energy consumption and improves the energy efficiency ratio of the system; at the same time, the heating medium input and output ports arranged at both ends of the first heating chamber ensure the continuous circulation of the heating medium, further enhancing the stability and reliability of the heating effect; 3. The design of the first discharge pipe can effectively reduce heat loss; specifically, the first insulation chamber between the first inner tube and the first outer tube is connected to the first heating chamber, ensuring that the material in the preheating chamber can still maintain a high temperature during the transportation process, thereby improving the energy utilization efficiency of the entire system, thereby achieving energy saving effects; at the same time, this design also ensures the continuity and stability of the material, avoiding process problems caused by temperature fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0028] Figure 2 yes Figure 1 A partial enlarged view of part A.

[0029] Figure 3 It is a schematic diagram of the overall structure of Example 2 of the present application.

[0030] Description of the accompanying drawings: 1, cylinder; 11, upper cylinder; 111, first inner cylinder; 112, first jacket; 113, first heating chamber; 1131, first heating medium input port; 1132, first heating medium output port; 114, first guide plate; 115, first feed pipe; 116, first discharge pipe; 1161, first inner tube; 1162, first outer tube; 1163, first insulation chamber; 117, inspection port; 118, exhaust port; 12, lower cylinder; 121, second inner cylinder; 122, second jacket; 123, second heating chamber; 1231, second heating medium input port 1. outlet; 1232. second heating medium outlet; 124. second guide plate; 125. second feed pipe; 1251. second inner pipe; 1252. second outer pipe; 1253. second insulation chamber; 126. second discharge pipe; 13. precondensation chamber; 14. preheating chamber; 2. control valve; 3. coil heating device; 4. tray; 41. upper tray; 42. lower tray; 43. first blanking channel; 44. blanking pipe; 5. gas collecting pipe; 51. second blanking channel; 52. vent; 6. third guide plate; 7. reinforcement ring; 8. temperature detector; 9. pressure detector; 10. skirt. DETAILED DESCRIPTION

[0031] The following combination Figure 1-Figure 3 This application is described in further detail.

[0032] The embodiment of the present application discloses an energy-saving pre-condensation tower. Example 1

[0033] Reference Figure 1 and Figure 2In this embodiment, the energy-saving pre-condensation tower includes a cylinder 1, a tower plate 4 and a gas collecting pipe 5. The cylinder 1 is vertically arranged in a cylindrical shape, and a skirt 10 for supporting the cylinder 1 is connected to the bottom of the cylinder 1. The cylinder 1 includes an upper cylinder 11 and a lower cylinder 12, which are sealed by flanges and a pre-condensation chamber 13 for heating the material is formed between the upper cylinder 11 and the lower cylinder 12; a separate pre-heating chamber 14 for pre-heating the material is formed in the upper cylinder 11 by partitioning the pre-condensation chamber 13, and a coil heating device 3 is arranged in the pre-heating chamber 14; the top and side walls of the upper cylinder 11 are also respectively provided with an exhaust port 118 and an inspection port 117 connected to the pre-heating chamber 14, the exhaust port 118 is used to discharge the waste gas generated when the material is heated in the pre-heating chamber 14, and the inspection port 117 allows personnel to enter the pre-heating chamber 14 for maintenance or overhaul work.

[0034] The upper cylinder 11 includes a first inner cylinder 111 and a first jacket 112, and the first jacket 112 is sleeved outside the first inner cylinder 111; the first jacket 112 and the first inner cylinder 111 are sealed and connected through one end of the exhaust port 118 and one end of the flange to form a first heating chamber 113 between the inner wall of the first jacket 112 and the outer wall of the first inner cylinder 111; the first inner cylinder 111 is provided with a spiral first guide plate 114 along its outer wall, and the first guide plate 114 divides the first heating chamber 113 into a spiral shape; the upper and lower ends of the upper cylinder 11 located at the first heating chamber 113 are respectively provided with a first heating medium input port 1131 and a first heating medium output port 1132 connected to the first heating chamber 113.

[0035] In this embodiment, after the heating medium flows into the first heating chamber 113 from the first heating medium input port 1131, it spirally flows around the outer wall of the first inner cylinder 111 in the first heating chamber 113 for heat exchange, thereby increasing the temperature of the preheating chamber 14 to preheat the material, and finally the heating medium after heat exchange flows out from the first heating medium output port 1132. In other embodiments, the upper cylinder 11 and the lower cylinder 12 can be independent of each other, the preheating chamber 14 is provided in the upper cylinder 11, and the precondensation chamber 13 is provided in the lower cylinder 12; the first guide plate 114 can also be provided on the inner wall of the first jacket 112; the first heating medium input port 1131 and the first heating medium output port 1132 can be provided in multiple numbers according to the material heating needs, and the positions of the first heating medium input port 1131 and the first heating medium output port 1132 can also be flexibly adjusted according to the situation that the first heating chamber 113 is intercepted by other openings or pipelines.

[0036] Preferably, one end of the first guide plate 114 facing away from the first inner cylinder 111 is infinitely close to the inner wall of the first jacket 112 but does not contact the inner wall of the first jacket 112. This design can prevent the first guide plate 114 from directly contacting the first jacket 112, thereby causing the heat of the first inner cylinder 111 to be quickly transferred to the first jacket 112.

[0037] Reference Figure 1 and Figure 2 In this embodiment, a first feed pipe 115 and a first discharge pipe 116 connected to the preheating chamber 14 are provided on the wall of the upper cylinder 11, the height of the first feed pipe 115 is higher than the first discharge pipe 116, and the first discharge pipe 116 is located at the bottom end of the preheating chamber 14; the first discharge pipe 116 includes a first inner tube 1161 and a first outer tube 1162, one end of the first inner tube 1161 is connected to the first inner cylinder 111 and connected to the preheating chamber 14, and the other end extends to the outside of the first jacket 112; the first outer tube 1162 is sleeved on the outside of the first inner tube 1161, one end of the first outer tube 1162 is fixed on the first jacket 112, and the other end is sealed and connected to one end of the first inner tube 1161 away from the first inner cylinder 111 to form a first insulation chamber 1163 connected to the first heating chamber 113 between the first inner tube 1161 and the first outer tube 1162.

[0038] Specifically, the material enters the preheating chamber 14 from the first feed pipe 115, and after being preheated, flows out from the first inner tube 1161 to the precondensation chamber 13, and the heating medium flows in the first heat preservation chamber 1163 to keep the first inner tube 1161 warm. In other embodiments, the first feed pipe 115 can also adopt a sandwich insulation structure similar to the first discharge pipe 116; the number of the first feed pipe 115 and the first discharge pipe 116 can be adjusted as needed; the first heat preservation chamber 1163 can also be independently set to a vacuum state, and is not connected to the first heating chamber 113.

[0039] Reference Figure 1 and Figure 2 In this embodiment, the lower cylinder 12 includes a second inner cylinder 121 and a second jacket 122; the second jacket 122 is sleeved outside the second inner cylinder 121, and one end of the second jacket 122 close to the flange is sealed and connected to one end of the second inner cylinder 121 close to the flange to form a second heating chamber 123 between the inner wall of the second jacket 122 and the outer wall of the second inner cylinder 121; the second inner cylinder 121 is provided with a spiral second guide plate 124 along its outer wall, and the second guide plate 124 divides the second heating chamber 123 into a spiral shape; the lower cylinder 12 is provided with a second heating medium input port 1231 and a second heating medium output port 1232 communicating with the second heating chamber 123 at the upper and lower ends of the second heating chamber 123, respectively.

[0040] In this embodiment, after the heating medium flows into the second heating chamber 123 from the second heating medium input port 1231, it spirally flows around the outer wall of the second inner cylinder 121 in the second heating chamber 123 for heat exchange, thereby increasing the temperature of the pre-condensation chamber 13 to perform the pre-condensation reaction of the material, and finally the heating medium after heat exchange flows out from the second heating medium output port 1232. In other embodiments, the second guide plate 124 can also be arranged on the inner wall of the second jacket 122; the second heating medium input port 1231 and the second heating medium output port 1232 can be arranged in multiple numbers according to the material heating needs, and the positions of the second heating medium input port 1231 and the second heating medium output port 1232 can also be flexibly adjusted according to the situation that the second heating chamber 123 is intercepted by other openings or pipelines; the first heating medium output port 1132 can also be directly connected to the second heating medium input port 1231.

[0041] Reference Figure 1 and Figure 2 In this embodiment, one end of the second guide plate 124 facing away from the second inner cylinder 121 is infinitely close to the inner wall of the second jacket 122 but does not contact the inner wall of the second jacket 122. This design can prevent the second guide plate 124 from directly contacting the second jacket 122 and causing the heat of the second inner cylinder 121 to be quickly transferred to the second jacket 122.

[0042] Preferably, a reinforcement ring 7 is provided between the second jacket 122 and the second inner cylinder 121 for strengthening the connection strength between the second jacket 122 and the second inner cylinder 121. One end of the reinforcement ring 7 is connected to the outer wall of the second inner cylinder 121, and the other end is connected to the inner wall of the second jacket 122 and passes through the outer wall of the second jacket 122. The reinforcement ring 7 and the second guide plate 124 are arranged in parallel to prevent the second heating chamber 123 from being cut off.

[0043] Reference Figure 1 and Figure 2 In this embodiment, a second feed pipe 125 and a second discharge pipe 126 connected to the pre-condensation chamber 13 are provided on the wall of the lower cylinder 12. The height of the second feed pipe 125 is higher than the second discharge pipe 126. The second feed pipe 125 is connected to the first discharge pipe 116, and the second discharge pipe 126 is located at the bottom of the pre-condensation chamber 13.

[0044] The second discharge pipe 126 includes a second inner tube 1251 and a second outer tube 1252, one end of the second inner tube 1251 is connected to the second inner cylinder 121 and connected to the pre-condensation chamber 13, and the other end extends to the outside of the second jacket 122 and is connected to the first inner tube 1161; the second outer tube 1252 is sleeved on the outside of the second inner tube 1251, one end of the second outer tube 1252 is fixed on the second jacket 122, and the other end is sealed and connected to the end of the second inner tube 1251 away from the second inner cylinder 121 to form a second insulation chamber 1253 connecting to the second heating chamber 123 between the second inner tube 1251 and the second outer tube 1252; specifically, the material flows from the first inner tube 1161 to the second inner tube 1251 and then enters the pre-heating chamber 14 for pre-condensation reaction, and a heating medium circulates in the second insulation chamber 1253 to insulate the second inner tube 1251. In other embodiments, the second discharge pipe 126 may also adopt a sandwich insulation structure similar to the second feed pipe 125; the number of second feed pipes 125 and second discharge pipes 126 may be adjusted as needed; the second insulation chamber 1253 may also be independently set to a vacuum state and not connected to the second heating chamber 123.

[0045] Preferably, a control valve 2 is provided between the second feed pipe 125 and the first discharge pipe 116 , and the flow rate of the material input into the pre-condensation chamber 13 can be controlled by adjusting the opening size of the control valve 2 .

[0046] Reference Figure 1 and Figure 2 In this embodiment, the tower tray 4 is arranged in the lower cylinder 12, and multiple layers of the tower tray 4 are arranged along the height direction at a preset interval. The interval between adjacent tower trays 4 can be set according to actual needs; the shape of the tower tray 4 matches the cross-sectional shape of the lower cylinder 12.

[0047] The tower plate 4 includes an upper tower plate 41 and a lower tower plate 42 which are arranged opposite to each other. Both the upper tower plate 41 and the lower tower plate 42 are made of stainless steel. The upper tower plate 41 is arranged horizontally and the outer edge of the upper tower plate 41 is sealed and connected to the inner wall of the lower cylinder 12. A drop pipe 44 is provided in the central part of the upper tower plate 41, which passes through the upper and lower surfaces of the upper tower plate 41 and connects to the lower tower plate 42. The outer wall of the drop pipe 44 is sealed and connected to the upper tower plate 41. The upper end of the drop pipe 44 protrudes from the upper surface of the upper tower plate 41 by a certain height, and the lower end of the drop pipe 44 is higher than the upper surface of the lower tower plate 42. In this way, the upper tower plate 41 forms an annular space for accommodating materials.

[0048] The lower tray 42 is connected to the upper tray 41, and a circle of raised structures are provided at the edge of the lower tray 42, which makes the lower tray 42 also form a ring-shaped space for accommodating materials; a first material drop channel 43 is formed between the lower tray 42 and the inner wall of the lower cylinder 12; the material on the upper tray 41 flows over the upper end of the drop pipe 44 and flows to the lower tray 42 through the drop pipe 44, and then flows to the upper surface of the upper tray 41 of the next layer through the first drop channel 43. In other embodiments, the lower tray 42 can also be connected to the inner wall of the second inner cylinder 121.

[0049] Preferably, multiple second feed pipes 125 are provided along the height direction of the lower cylinder 12, and the multiple second feed pipes 125 are all connected to the first discharge pipe 116, and a control valve 2 is provided between the multiple second feed pipes 125 and the first discharge pipe 116. The multiple second feed pipes 125 can transport materials to tower plates 4 at different heights to meet the control of the reaction time of the material in the pre-condensation chamber 13.

[0050] Reference Figure 1 and Figure 2 In this embodiment, the gas collecting pipe 5 is arranged in the lower cylinder 12. The gas collecting pipe 5 can be made of a stainless steel pipe. The gas collecting pipe 5 passes through the multi-layer lower tower plate 42 and the drop pipe 44 of the multi-layer upper tower plate 41. A second drop channel 51 for materials to flow through is formed between the gas collecting pipe 5 and the drop pipe 44. One end of the gas collecting pipe 5 extends to the bottom surface of the lowest tower plate 4, and the other end is connected to the heat medium input port of the coil heating device 3; the gas collecting pipe 5 is provided with a plurality of vents 52 that connect the pre-condensation chamber 13 with the inner cavity of the gas collecting pipe 5 and are used to discharge the hot air in the pre-condensation chamber 13. The vents 52 are all located on the side of the lower tower plate 42 away from the upper tower plate 41 of the same layer and are higher than the upper end of the upper drop pipe 44 of the lower tower plate 4; such a design can effectively collect and discharge the steam generated during the pre-condensation process, and at the same time use the waste heat of the steam to further heat the material, thereby improving the energy utilization efficiency.

[0051] Reference Figure 1 and Figure 2 In this embodiment, the upper cylinder 11 and the outer wall of the upper cylinder 11 are also provided with multiple temperature detectors 8 and pressure detectors 9 for detecting the temperature, air pressure and hydraulic pressure in the preheating chamber 14 and / or the precondensation chamber 13; the multiple temperature detectors 8 and pressure detectors 9 are all arranged at different heights. Such a design can detect the material temperature or gas temperature at different positions and stages through multiple temperature detectors 8, and detect the air pressure or hydraulic pressure at different positions through multiple pressure detectors 9, so that the reaction state of the material can be monitored more intuitively and in real time.

[0052] Preferably, the upper tray 41 and the lower tray 42 are provided with a plurality of bubble caps on one side for receiving the material, and these bubble caps can enhance the turbulence of the material and promote the mass transfer and heat transfer process. Specifically, the bubble caps can be made of stainless steel or ceramic. In addition, microporous nozzles can be added under the bubble caps to further stir the material by spraying gas or liquid to improve the reaction efficiency.

[0053] The implementation principle of Example 1 is: through reasonable design and efficient heat transfer methods, energy consumption is significantly reduced, heat transfer efficiency is improved, and good economic and environmental benefits are achieved. Specifically, the material first enters the preheating chamber 14 through the first feed pipe 115, and is heated by the coil heating device 3 in the preheating chamber 14; the heating medium in the first heating chamber 113 is evenly distributed through the spiral first guide plate 114, ensuring sufficient heat exchange between the heating medium and the first inner cylinder 111, thereby improving the preheating efficiency; the preheated material enters the precondensation chamber 13 through the first discharge pipe 116; in order to reduce heat loss during transmission, the first discharge pipe 116 adopts a double-layer structure, and the internal heating medium is effectively insulated by the first insulation chamber 1163; at the same time, the setting of the control valve 2 allows precise adjustment of the speed at which the material enters the precondensation chamber 13, ensuring the stable operation of the system. After the material enters the precondensation chamber 13, it descends step by step through the multi-layer tower tray 4; the material on each layer of the tower tray 4 first falls into the next layer of the tower tray 4 through the drop pipe 44, and then is redistributed through the first drop channel 43; this process not only ensures the uniform distribution of the material, but also promotes the mixing and reaction between the materials; during the entire precondensation process, the gas collecting pipe 5 not only collects the steam generated during the precondensation process, but also recycles this part of the steam through the coil heating device 3, further heating the material, and significantly improving the energy utilization rate; in addition, multiple temperature detectors 8 and pressure detectors 9 are distributed at different heights in the preheating chamber 14 and the precondensation chamber 13, which can monitor the status of the material in real time to ensure the efficiency and stability of the production process. Example 2

[0054] Reference Figure 3 The difference between the present embodiment 2 and the embodiment 1 is that: the blanking pipe 44 is provided with a spiral third guide plate 6 along its inner wall, and the third guide plate 6 divides the second blanking channel 51 into a spiral shape.

[0055] Preferably, an anti-scaling coating may be coated on the surface of the first guide plate 114 to reduce the occurrence of scaling and extend the service life.

[0056] The advantages of this embodiment 2 over embodiment 1 are that the material can flow downward along the spiral path under the action of the third guide plate 6, thereby increasing the residence time and heat exchange area of ​​the material in the second material delivery channel 51 and improving the heating efficiency and uniformity of the material.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An energy-saving precondensation tower, characterized in that: include: A cylinder (1), wherein a heating medium for heating materials flows through the cylinder wall of the cylinder (1); the cylinder (1) comprises an upper cylinder (11) and a lower cylinder (12), wherein the upper cylinder (11) and the lower cylinder (12) are connected and a pre-condensation chamber (13) is formed between the upper cylinder (11) and the lower cylinder (12); a pre-heating chamber (14) for pre-heating materials is provided in the upper cylinder (11), and the on-off and flow rate between the pre-heating chamber (14) and the pre-condensation chamber (13) are controlled by a control valve (2), and a coil heating device (3) is provided in the pre-heating chamber (14); A tower tray (4) is arranged in a lower cylinder (12), and the tower tray (4) is provided with multiple layers along a height direction at a preset interval; the tower tray (4) comprises an upper tower tray (41) and a lower tower tray (42); the outer edge of the upper tower tray (41) is sealedly connected to the inner wall of the lower cylinder (12); the lower tower tray (42) is arranged opposite to the upper tower tray (41), and a first material dropping channel (43) is formed between the lower tower tray (42) and the inner wall of the lower cylinder (12); a material dropping pipe (44) is provided at the center of the upper tower tray (41), which passes through the upper and lower surfaces of the upper tower tray (41) and is connected to the lower tower tray (42); the material dropping pipe (44) and the first material dropping channel (43) allow materials on the upper tower tray (41) to flow from the material dropping pipe (44) to the lower tower tray (42) and then flow from the first material dropping channel (43) to the upper tower tray (41) of the next layer; A gas collecting pipe (5) is arranged in the lower cylinder (12), the gas collecting pipe (5) penetrates the multiple layers of lower tower trays (42) and passes through the drop pipes (44) of the multiple layers of upper tower trays (41), and a second drop channel (51) for materials to flow through is formed between the gas collecting pipe (5) and the drop pipe (44); one end of the gas collecting pipe (5) extends to the bottom surface of the lowest tower tray (4), and the other end is connected to the heat medium input port of the coil heating device (3); the gas collecting pipe (5) is provided with a plurality of vents (52) that communicate with the pre-condensation chamber (13) and the inner cavity of the gas collecting pipe (5) for discharging hot air in the pre-condensation chamber (13); the gas collecting pipe (5) can heat the material by using the hot air flowing in the gas collecting pipe (5) when the material flows through the second drop channel (51) and contacts the outer wall of the gas outlet pipe.

2. The energy-saving precondensation tower according to claim 1, characterized in that: The upper cylinder (11) comprises a first inner cylinder (111) and a first jacket (112); the first jacket (112) is sleeved outside the first inner cylinder (111) to form a first heating chamber (113) between the inner wall of the first jacket (112) and the outer wall of the first inner cylinder (111); the first inner cylinder (111) is provided with a spiral first guide plate (114) along its outer wall to divide the first heating chamber (113) into a spiral shape; and the upper cylinder (11) is provided with a first heating medium input port (1131) and a first heating medium output port (1132) communicating with the first heating chamber (113) at two ends of the first heating chamber (113), respectively.

3. An energy-saving precondensation tower according to claim 2, characterized in that: The lower cylinder (12) comprises a second inner cylinder (121) and a second jacket (122); the second jacket (122) is sleeved outside the second inner cylinder (121) to form a second heating chamber (123) between the inner wall of the second jacket (122) and the outer wall of the second inner cylinder (121); the second inner cylinder (121) is provided with a spiral second guide plate (124) along its outer wall to divide the second heating chamber (123) into a spiral shape; and the lower cylinder (12) is provided with a second heating medium input port (1231) and a second heating medium output port (1232) at two ends of the second heating chamber (123) respectively connected to the second heating chamber (123).

4. The energy-saving precondensation tower according to claim 3, characterized in that: One end of the first guide plate (114) facing away from the first inner cylinder (111) is infinitely close to the inner wall of the first jacket (112) but does not contact the inner wall of the first jacket (112); and one end of the second guide plate (124) facing away from the second inner cylinder (121) is infinitely close to the inner wall of the second jacket (122) but does not contact the inner wall of the second jacket (122).

5. The energy-saving precondensation tower according to claim 4, characterized in that: A first feed pipe (115) and a first discharge pipe (116) communicating with the preheating chamber (14) are provided on the wall of the upper cylinder (11); a second feed pipe (125) and a second discharge pipe (126) communicating with the precondensation chamber (13) are provided on the wall of the lower cylinder (12); one end of the control valve (2) is connected to the first discharge pipe (116), and the other end is connected to the second feed pipe (125).

6. The energy-saving precondensation tower according to claim 5, characterized in that: The first discharge pipe (116) comprises a first inner tube (1161) and a first outer tube (1162); one end of the first inner tube (1161) is connected to the first inner cylinder (111) and communicates with the preheating chamber (14), and the other end extends to the outside of the first jacket (112); the first outer tube (1162) is sleeved on the outside of the first inner tube (1161), and one end of the first outer tube (1162) is fixed to the first jacket (112), and the other end is sealed and connected to an end of the first inner tube (1161) away from the first inner cylinder (111) to form a first heat preservation chamber (1163) connected to the first heating chamber (113) between the first inner tube (1161) and the first outer tube (1162).

7. The energy-saving precondensation tower according to claim 5, characterized in that: The second feed pipe (125) comprises a second inner tube (1251) and a second outer tube (1252); one end of the second inner tube (1251) is connected to the second inner cylinder (121) and communicates with the pre-condensation chamber (13), and the other end extends to the outside of the second jacket (122); the second outer tube (1252) is sleeved on the outside of the second inner tube (1251), and one end of the second outer tube (1252) is fixed to the second jacket (122), and the other end is sealed and connected to one end of the second inner tube (1251) away from the second inner cylinder (121) to form a second heat preservation chamber (1253) communicating with the second heating chamber (123) between the second inner tube (1251) and the second outer tube (1252).

8. The energy-saving precondensation tower according to claim 1, characterized in that: The material dropping pipe (44) is provided with a spiral third guide plate (6) along its inner wall to divide the second material dropping channel (51) into a spiral shape.

9. The energy-saving precondensation tower according to claim 1, characterized in that: The vent holes (52) are all located on a side of the lower tray (42) away from the upper tray (41) of the same layer and are higher than the upper end of the upper material drop pipe (44) of the lower tray (4).

10. The energy-saving precondensation tower according to claim 1, characterized in that: A plurality of bubble caps are provided on a surface of the upper tower plate (41) and the lower tower plate (42) for receiving materials.

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