A methanamide condenser energy saving system for producing urea

Abstract

The application provides a methanamide condenser energy-saving system for producing urea, and belongs to the technical field of chemical equipment. The methanamide condenser energy-saving system for producing urea comprises a condensing tank and a condensing structure. The condensing tank comprises a tank body, an inlet distributor and a tube sheet which are respectively arranged at the bottom end and the top end of the tank body, a partition plate arranged in the tank body, a first baffle and a second baffle, the partition plate is fixedly installed at the middle part of the tank body, the first baffle and the second baffle are arranged below and above the partition plate respectively, the first baffle and the second baffle are both provided with a plurality of baffles which are uniformly distributed along the up-down direction, a plurality of air holes are arranged on the partition plate, liquid phase channels are arranged between the plurality of first baffles and the plurality of second baffles and the inner wall of the tank body, so that the liquid is baffle-flowed, a plurality of gas phase channels are arranged on the plurality of first baffles, and the heat exchange efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of chemical equipment, and particularly relates to a methanamide condenser energy-saving system for producing urea. BACKGROUND

[0002] The methanamide condenser is one of the key devices in the urea production process. In the urea production process, the synthetic reaction liquid recovered by the high-pressure scrubber is usually reacted to synthesize methanamide liquid. During the reaction, steam is used for heating. The methanamide liquid from the high-pressure scrubber and the mixed gas of CO2, NH3 and H2O from the stripping tower and the urea synthesis tower enter the high-pressure methanamide condenser together. These gas and liquid mixtures will undergo a synthesis reaction to produce urea methanamide solution. The reaction will release a large amount of heat. Since the reaction is a reversible reaction, if the heat is not discharged in time, it will affect the reaction. At the same time, part of the urea methanamide solution will be evaporated into gas due to the heat generated by the reaction, which needs to be recovered.

[0003] A high-pressure methanamide condenser is disclosed in Chinese Patent No. CN118856941A, which comprises a shell, a tube bundle and an inner part inside the shell. The shell is provided with a methanamide liquid inlet and a CO2 gas inlet at the bottom, and a reaction liquid outlet and a gas outlet at the upper part. The heat exchange tube bundle is in a U-shaped tube structure, and the heat conduction medium carries away the heat generated by the methanamide hydrolysis through the heat exchange tube bundle. The inner part includes a high-efficiency tray. The downcomer is supported by the high-efficiency tray.

[0004] The existing methanamide condenser directly inserts all the condensing pipes into the reaction liquid for condensation. However, during the reaction, part of the urea methanamide solution will be evaporated into gas due to the heat generated by the reaction. The gas cannot be condensed into liquid by the methanamide condenser, and will be discharged from the reactor into the high-pressure scrubber for washing and recovery, and then repeated reaction, causing energy waste and reducing the synthesis efficiency of the urea methanamide solution. SUMMARY

[0005] The purpose of the present application is to provide a methanamide condenser energy-saving system for producing urea, which aims to solve the problem that part of the urea methanamide solution will be evaporated into gas due to the heat generated by the reaction, which cannot be condensed into liquid by the methanamide condenser.

[0006] To achieve the above object, the present application provides the following technical scheme: a methanamide condenser energy-saving system for producing urea, comprising a condensing tank and a condensing structure, the condensing tank comprising a tank body, an inlet distributor and a tube sheet respectively located at the bottom end and the top end inside the tank body, a partition plate located inside the tank body, a first baffle plate and a second baffle plate, the partition plate being fixedly installed at the middle part of the tank body, the first baffle plate and the second baffle plate being located below and above the partition plate respectively, the first baffle plate and the second baffle plate each having a plurality of baffles and being uniformly distributed along the up-down direction, the partition plate being provided with air holes, the plurality of first baffles and the plurality of second baffles each being provided with a liquid phase channel between the tank body and the inner wall of the tank body for baffling the liquid, and the plurality of first baffles being provided with a plurality of gas phase channels.

[0007] The condensing structure comprises a lifting plate located above the tube sheet, a U-shaped condensing pipe extending in the vertical direction, a liquid vibration assembly located inside the U-shaped condensing pipe, and a driving assembly driving the lifting plate to lift, one end of the U-shaped condensing pipe being slidably sleeved on the tube sheet in the up-down direction, the other end of the U-shaped condensing pipe being slidably penetrated through the tube sheet and then fixedly installed on the lifting plate, the U-shaped condensing pipe being slidably penetrated through the partition plate, the first baffle plate and the second baffle plate in the up-down direction, and the U-shaped condensing pipe having a plurality of baffles and being uniformly distributed inside the tank body.

[0008] The liquid vibration assembly comprises a fixed rod sleeved in the U-shaped condensing pipe in the up-down direction and a liquid vibration mechanism sleeved on the outer wall of the fixed rod, the liquid vibration mechanism having a plurality of baffles and being uniformly distributed along the axis direction of the fixed rod, and the top end of the fixed rod being slidably penetrated through the lifting plate and fixedly connected with the top wall of the tank body.

[0009] The liquid vibration mechanism comprises a sealing sleeve slidably sleeved on the outer wall of the fixed rod, the inside of the sealing sleeve being provided with a flow guide hole extending along the axis direction of the fixed rod, the flow guide hole being slidably installed with a piston sleeve slidably sleeved on the outer wall of the fixed rod, the outer side wall of the piston sleeve being in abutment with the inner side wall of the flow guide hole, the bottom of the piston sleeve being installed with an elastic member sleeved on the outer wall of the fixed rod between the bottom of the piston sleeve and the bottom of the flow guide hole, the top middle part of the sealing sleeve being provided with a water inlet in communication with the top of the flow guide hole, the side wall middle part of the flow guide hole being provided with a communication groove, and the bottom wall edge of the sealing sleeve being provided with a water outlet in communication with the bottom of the flow guide hole, the communication groove and the water outlet each having a plurality of baffles and being uniformly distributed along the circumferential direction of the sealing sleeve.

[0010] The top middle part of the tank body is provided with a steam outlet, the driving assembly comprises a transmission plate fixedly installed on both sides of the top of the lifting plate and a steam turbine installed on the steam outlet, the top of each of the two transmission plates being slidably penetrated through the top wall of the tank body, the top of the side of each of the two transmission plates close to the steam turbine being provided with a transmission groove, the two side walls of the steam turbine close to the two transmission plates each being rotatably installed with a transmission shaft, one end of the transmission shaft being in transmission connection with the output shaft of the steam turbine, the other end of the transmission shaft extending into the transmission groove and being fixedly installed with a cam, and the bottom of the piston sleeve being provided with a limiting sleeve fixedly sleeved on the outer wall of the fixed rod.

[0011] The effect is that the liquid vibration mechanism can vibrate the cooling water between two adjacent liquid vibration mechanisms, so that the cooling water at the center of the U-shaped condensing pipe mixes with the cooling water at the inner wall of the U-shaped condensing pipe, and then all the cooling water in the U-shaped condensing pipe can uniformly exchange heat with the outside, improve the heat exchange efficiency, and speed up the evaporation of the cooling water into water vapor.

[0012] The side of the partition plate and the inner wall of the tank body are provided with a liquid leakage groove, the liquid leakage groove and the liquid phase channel on one of the second baffles close to the partition plate are located on the same side, and the top of the liquid leakage groove is fixedly installed with a baffle.

[0013] The effect is that the cooled liquid can be discharged through the liquid discharge pipe.

[0014] The outer wall bottom of the tank body is fixedly installed with a material inlet pipe on both sides, the outer wall middle of the tank body is fixedly installed with a liquid discharge pipe below the partition plate, the outer wall top of the tank body is fixedly installed with a cooling liquid inlet pipe between the tube plate and the lifting plate, the tube plate is fixedly installed with a gas discharge pipe, the bottom end of the gas discharge pipe penetrates the tube plate, the top end of the gas discharge pipe penetrates the top wall of the tank body and the lifting plate and is slidably connected with the lifting plate.

[0015] The top of the partition plate is fixedly installed with a heat preservation sleeve which is slidably sleeved on the outer wall of one end of the U-shaped condensing pipe connected with the lifting plate.

[0016] The effect is that the heat preservation sleeve avoids the heat exchange between the water vapor in the U-shaped condensing pipe and the cooling water, so that the water vapor is condensed into liquid water.

[0017] Compared with the prior art, the beneficial effects of the present application are:

[0018] The liquid vibration mechanism can vibrate the cooling water between two adjacent liquid vibration mechanisms, so that the cooling water at the center of the U-shaped condensing pipe mixes with the cooling water at the inner wall of the U-shaped condensing pipe, and then all the cooling water in the U-shaped condensing pipe can uniformly exchange heat with the outside, improve the heat exchange efficiency, and speed up the evaporation of the cooling water into water vapor, and the baffles can scrape off the condensed liquid droplets adhered to the outer wall of the U-shaped condensing pipe, avoid the influence of the liquid droplets on the heat exchange, and improve the heat exchange efficiency of the cooling water.

[0019] The partition plate 12 can exchange heat with the gas in the cavity between the partition plate 12 and the tube plate 13, so that the methanamine gas evaporated by the reaction heat is re-condensed into liquid, avoiding the discharged gas carrying more heat, thereby improving the utilization rate of the reaction heat and the energy-saving effect of the device. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of the specification, illustrate embodiments of the application and are used to explain the application, but are not intended to limit the application. In the drawings:

[0021] Figure 1 It is a structural schematic view of the condenser in the application;

[0022] Figure 2 It is a front view schematic view of the condenser in the application;

[0023] Figure 3 It is a structural schematic view of the condensing assembly in the application;

[0024] Figure 4 It is a structural schematic view of the lifting assembly in the application;

[0025] Figure 5 It is a structural schematic view of the condensing pipe in the application;

[0026] Figure 6 It is a structural schematic view of the liquid vibrating assembly in the application.

[0027] In the drawings: 1, condensing tank; 10, tank body; 101, steam outlet; 11, inlet distributor; 111, distribution hole; 12, partition plate; 121, liquid leakage groove; 122, baffle; 123, air hole; 13, tube plate; 14, first baffle; 141, gas phase channel; 15, second baffle; 16, material inlet pipe; 17, liquid discharge pipe; 18, cooling liquid inlet pipe; 19, gas discharge pipe; 2, base; 3, condensing structure; 31, lifting plate; 32, U-shaped condensing pipe; 321, heat preservation sleeve; 33, liquid vibrating assembly; 331, fixing rod; 332, sealing sleeve; 333, piston sleeve; 3321, flow guide hole; 3322, water inlet; 3323, communication groove; 3324, water outlet; 334, elastic member; 335, limiting sleeve; 34, transmission plate; 341, transmission groove; 35, steam turbine; 36, transmission shaft; 37, cam. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0029] Please refer to Figures 1-6The application provides the following technical scheme: a methanamide condenser energy-saving system for producing urea, which comprises a condensing tank 1, a base 2 for supporting the condensing tank 1 at the bottom of the condensing tank 1 and a condensing structure 3.

[0030] Reference Figure 1 And Figure 2 As shown in the figure, the condensing tank 1 comprises a tank body 10, an inlet distributor 11, a partition plate 12, a tube plate 13, a first baffle plate 14, a second baffle plate 15, a material inlet pipe 16, a liquid outlet pipe 17, a cooling liquid inlet pipe 18 and a gas outlet pipe 19.

[0031] The middle part of the top end of the tank body 10 is provided with a steam outlet 101.

[0032] The inlet distributor 11 is fixedly installed at the bottom end inside the tank body 10, and a plurality of distribution holes 111 are formed in the inlet distributor 11.

[0033] The partition plate 12 is fixedly installed at the middle part of the tank body 10, a liquid leakage groove 121 is arranged between one side of the partition plate 12 and the inner wall of the tank body 10, a baffle plate 122 is fixedly installed at the top of the liquid leakage groove 121, the top of the baffle plate 122 is inclined to the center direction of the tank body 10, and a gas hole 123 is formed in the partition plate 12.

[0034] The tube plate 13 is fixedly installed at the top of the tank body 10.

[0035] The first baffle plate 14 and the second baffle plate 15 are located below and above the partition plate 12 respectively, the first baffle plate 14 and the second baffle plate 15 are both a plurality of and are uniformly distributed in the up-down direction, a plurality of liquid phase passages are arranged between the plurality of first baffle plates 14 and the inner wall of the tank body 10 and between the plurality of second baffle plates 15 and the inner wall of the tank body 10, for deflecting the liquid, a plurality of gas phase passages 141 are formed in the plurality of first baffle plates 14, and the liquid phase passage of one of the second baffle plates 15 close to the partition plate 12 is located on the same side as the liquid leakage groove 121.

[0036] The material inlet pipe 16 has two and is fixedly installed at the bottom of the outer wall of the tank body 10 on both sides and below the inlet distributor 11, the two material inlet pipes 16 are both in communication with the inside of the tank body 10, and the two material inlet pipes 16 are respectively used for entering the methanamide liquid from the high-pressure scrubber and the mixed gas of CO2, NH3 and H2O from the stripping tower and the urea synthesis tower into the inside of the tank body 10.

[0037] The liquid outlet pipe 17 is fixedly installed at the middle part of the outer wall of the tank body 10 and below the partition plate 12, the liquid outlet pipe 17 is an L-shaped pipe, the pipe opening axis outside the tank body 10 extends horizontally, the pipe opening axis inside the tank body 10 extends horizontally upward, and the liquid outlet pipe 17 is used for easily discharging the reacted urea methanamide.

[0038] The cooling liquid inlet pipe 18 is fixedly installed at the top of the outer wall of the tank body 10 and between the tube plate 13 and the lifting plate 31.

[0039] A gas discharge pipe 19 is fixedly installed on the tube plate 13, the bottom end of the gas discharge pipe 19 penetrates the tube plate 13, the top end of the gas discharge pipe 19 penetrates the top wall of the tank body 10 and the lifting plate 31 and is in sliding connection with the lifting plate 31, and is used for discharging the gas that has not participated in the reaction after the reaction.

[0040] Referring to Figures 2-6 As shown, the condensing structure 3 comprises a lifting plate 31 located above the tube plate 13, a U-shaped condensing pipe 32 extending in the vertical direction, a liquid vibration assembly 33 located inside the U-shaped condensing pipe 32, and a driving assembly for driving the lifting plate 31 to lift and lower.

[0041] Referring to Figure 2 and Figure 3 As shown, one end of the U-shaped condensing pipe 32 is slidingly sleeved on the tube plate 13 in the up-down direction, the other end of the U-shaped condensing pipe 32 is slidingly penetrated through the tube plate 13 and then fixedly installed on the lifting plate 31, the U-shaped condensing pipe 32 is slidingly penetrated through the partition plate 12, the first baffle 14 and the second baffle 15 in the up-down direction, the U-shaped condensing pipe 32 has a plurality of pipes and is uniformly distributed in the tank body 10, and the top of the partition plate 12 is fixedly installed on the heat preservation sleeve 321 which is slidingly sleeved on the outer wall of the end of the U-shaped condensing pipe 32 connected with the lifting plate 31.

[0042] Referring to Figure 5 and Figure 6 As shown, the liquid vibration assembly 33 comprises a fixed rod 331 sleeved in the U-shaped condensing pipe 32 in the up-down direction and a liquid vibration mechanism sleeved on the outer wall of the fixed rod 331.

[0043] The top end of the fixed rod 331 is slidingly penetrated through the lifting plate 31 and is fixedly connected with the top wall of the tank body 10.

[0044] The liquid vibrating mechanism is multiple and is uniformly distributed along the axial direction of the fixed rod 331. The liquid vibrating mechanism comprises a sealing sleeve 332 which is slidingly sleeved on the outer wall of the fixed rod 331. The outer wall of the sealing sleeve 332 is in abutment with the inner portion of the U-shaped condenser tube 32. The inner portion of the sealing sleeve 332 is provided with a flow guide hole 3321 which extends along the axial direction of the fixed rod 331. The flow guide hole 3321 is slidingly provided with a piston sleeve 333 which is slidingly sleeved on the outer wall of the fixed rod 331. The outer side wall of the piston sleeve 333 is in abutment with the inner side wall of the flow guide hole 3321. The bottom portion of the piston sleeve 333 is provided with an elastic member 334 which is sleeved on the outer wall of the fixed rod 331 and is arranged between the bottom portion of the piston sleeve 333 and the bottom portion of the flow guide hole 3321. The top end middle portion of the sealing sleeve 332 is provided with a water inlet 3322 which is in communication with the top portion of the flow guide hole 3321. The side wall middle portion of the flow guide hole 3321 is provided with a communication groove 3323. The bottom wall edge portion of the sealing sleeve 332 is provided with a water outlet 3324 which is in communication with the bottom portion of the flow guide hole 3321. The communication groove 3323 and the water outlet 3324 are multiple and are uniformly distributed along the circumferential direction of the sealing sleeve 332. The bottom portion of the piston sleeve 333 is provided with a limiting sleeve 335 which is fixedly sleeved on the outer wall of the fixed rod 331.

[0045] Referring to Figure 2 and Figure 4 As shown in the figure, the driving assembly comprises two transmission plates 34 which are fixedly installed on the top portions of the two sides of the lifting plate 31 and a steam turbine 35 which is installed on the steam outlet 101.

[0046] The top portions of the two transmission plates 34 are slidingly penetrated through the top wall of the kettle body 10. The top portions of the two sides of the two transmission plates 34 which are close to the steam turbine 35 are each provided with a transmission groove 341.

[0047] The two side walls of the steam turbine 35 which are close to the two transmission plates 34 are each provided with a transmission shaft 36 which is rotatably installed. One end of the transmission shaft 36 is in transmission connection with the output shaft of the steam turbine 35. The other end of the transmission shaft 36 extends into the transmission groove 341 and is fixedly installed with a cam 37.

[0048] The implementation principle of the embodiment of the present application is as follows: when condensing, the methylamine solution from the high-pressure scrubber and the mixed gas of CO2, NH3 and H2O from the stripping tower and the urea synthesis tower are respectively discharged into the inner bottom of the tank body 10 through two material inlet pipes 16, and the methylamine solution and the mixed gas are uniformly distributed after passing through the inlet distributor 11 and then enter the space between the inlet distributor 11 and the baffle 12, at this time, the methylamine solution is deflected upward under the action of the first baffle 14, and the mixed gas rises along the gas phase channel 141 on the first baffle 14, at this time, the methylamine solution and the mixed gas react to generate methylamine, part of the methylamine is hydrolyzed to generate urea, and finally the urea methylamine solution generated by the reaction flows out through the liquid discharge pipe 17, and at the same time, a large amount of heat is released during the reaction, part of the urea methylamine solution is evaporated into gas by the heat generated by the reaction, the gas and the gas not participating in the reaction enter the cavity between the baffle 12 and the tube plate 13 through the air holes 123 on the baffle 12, and are deflected upward by the second baffle 15.

[0049] At the same time, cooling water is discharged into the inner top of the tank body 10 through the cooling liquid inlet pipe 18, and the cooling water enters the U-shaped condensing pipe 32 through the pipe opening on the tube plate 13, at this time, the cooling water exchanges heat with the gas-liquid mixed reactant below the baffle 12 through the U-shaped condensing pipe 32, and carries away the heat generated by the reaction, avoids the influence of heat on the reaction, and reduces the amount of urea methylamine solution evaporated into gas, the cooling water also exchanges heat with the gas in the cavity between the baffle 12 and the tube plate 13, so that the methylamine gas evaporated by the heat generated by the reaction is re-condensed into liquid, and re-enters the lower part of the baffle 12 through the liquid leakage groove 121 and the liquid discharge pipe 17 under the action of the second baffle 15 and the baffle 122, at this time, the cooling water is evaporated into water vapor after heat exchange on both sides, and is discharged into the steam outlet 101 through the other pipe opening of the U-shaped condensing pipe 32.

[0050] The water vapor enters into the steam turbine 35 through the steam outlet 101, drives the output shaft of the steam turbine 35 to rotate, and then the water vapor is discharged from the steam turbine 35 and enters into the high-pressure scrubber to heat the reaction of the synthetic reaction liquid. The output shaft of the steam turbine 35 drives the two transmission shafts 36 to rotate, the transmission shafts 36 drive the cam 37 to rotate, the rotation of the cam 37 drives the transmission plate 34 and the lifting plate 31 to reciprocatingly lift, at this time, the U-shaped condenser pipe 32 synchronously lifts with the lifting plate 31. Since the outer wall of the sealing sleeve 332 is in contact with the inside of the U-shaped condenser pipe 32, with the lifting of the U-shaped condenser pipe 32, the sealing sleeve 332 synchronously lifts under the friction force between the sealing sleeve 332 and the U-shaped condenser pipe 32. At this time, the piston sleeve 333 is lowered relative to the sealing sleeve 332 and compresses the elastic member 334 under the action of the cooling water. With the lowering of the sealing sleeve 332, the lowest part of the sealing sleeve 332 is lower than the bottom of the communication groove 3323, so that the cooling water cannot enter into the lower part of the piston sleeve 333 through the communication groove 3323, thereby relatively closing the two adjacent liquid vibrating mechanisms, and the cooling water cannot be supplemented. Therefore, with the lifting of the U-shaped condenser pipe 32, the cooling water between the two adjacent liquid vibrating mechanisms is vibrated, so that the cooling water at the center of the U-shaped condenser pipe 32 is mixed with the cooling water at the inner wall of the U-shaped condenser pipe 32, thereby enabling all the cooling water in the U-shaped condenser pipe 32 to uniformly exchange heat with the outside, improving the heat exchange efficiency and accelerating the speed of the cooling water being evaporated into water vapor.

[0051] Although the embodiments of the present application have been shown and described above, it should be understood by those skilled in the art that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A carboxyammonium condenser energy-saving system for producing urea, comprising a condensing tank and a condensing structure, wherein the condensing tank comprises a tank body and an inlet distributor and a tube sheet located at the bottom and top ends of the tank body, respectively, characterized in that: The condensation tank further includes a partition, a first baffle, and a second baffle located inside the tank body. The partition is fixedly installed in the middle of the tank body. The first baffle and the second baffle are respectively located below and above the partition. There are multiple first baffles and second baffles, and they are evenly distributed in the vertical direction. The partition is provided with air holes. The condensation structure includes a lifting plate located above the tube sheet, a U-shaped condenser tube extending in the vertical direction, a liquid vibrating assembly located inside the U-shaped condenser tube, and a driving assembly for driving the lifting plate to move up and down. One end of the U-shaped condenser tube is slidably sleeved on the tube sheet in the up-down direction, and the other end of the U-shaped condenser tube slides through the tube sheet and is then fixedly mounted on the lifting plate. The U-shaped condenser tube slides vertically through the partition, the first baffle, and the second baffle. The liquid vibrating assembly includes a fixed rod sleeved in the U-shaped condenser tube along the vertical direction and a liquid vibrating mechanism sleeved on the outer wall of the fixed rod. There are multiple liquid vibrating mechanisms and they are evenly distributed along the axis of the fixed rod. The top end of the fixed rod slides through the lifting plate and is fixedly connected to the top wall of the tank body. Material inlet pipes are fixedly installed on both sides of the bottom of the outer wall of the tank body, a drain pipe is fixedly installed in the middle of the outer wall of the tank body, the drain pipe is located below the partition, and a coolant inlet pipe located between the tube plate and the lifting plate is fixedly installed on the top of the outer wall of the tank body. A gas exhaust pipe is fixedly installed on the tube plate, the bottom end of the gas exhaust pipe passes through the tube plate, and the top end of the gas exhaust pipe passes through the lifting plate and the top wall of the tank body and is slidably connected to the lifting plate.

2. The energy-saving system for a methylammonium condenser for producing urea according to claim 1, characterized in that: The liquid vibrating mechanism includes a sealing sleeve that is slidably sleeved on the outer wall of the fixed rod, a guide hole extending along the axis direction of the fixed rod is opened inside the sealing sleeve, a piston sleeve that is slidably sleeved on the outer wall of the fixed rod is slidably installed in the guide hole, the outer wall of the piston sleeve is in contact with the inner wall of the guide hole, an elastic member that is sleeved on the outer wall of the fixed rod is installed between the bottom of the piston sleeve and the bottom of the guide hole, a water inlet connected to the top of the guide hole is opened in the middle of the top of the sealing sleeve, a connecting groove is opened in the middle of the side wall of the guide hole, and a water outlet connected to the bottom of the guide hole is opened at the edge of the bottom wall of the sealing sleeve.

3. The energy-saving system for a methylammonium condenser for producing urea according to claim 2, characterized in that: There are multiple communicating grooves and water outlets, and they are evenly distributed along the circumferential direction of the sealing sleeve.

4. The energy-saving system for a methylammonium condenser for producing urea according to claim 2, characterized in that: A steam outlet is provided in the middle of the top of the tank body, and the driving assembly includes transmission plates fixedly mounted on both sides of the top of the lifting plate and a steam turbine mounted on the steam outlet. The tops of the two transmission plates slide through the top wall of the tank body, and transmission grooves are provided on the tops of the two transmission plates on one side close to the steam turbine. Transmission shafts are rotatably mounted on the two side walls of the steam turbine close to the two transmission plates, one end of the transmission shaft is transmission-connected to the output shaft of the steam turbine, and the other end of the transmission shaft extends into the transmission groove and is fixedly mounted with a cam. The bottom of the piston sleeve is provided with a limiting sleeve fixedly sleeved on the outer wall of the fixed rod.

5. The energy-saving system for a methylammonium condenser for producing urea according to claim 1, characterized in that: There are multiple U-shaped condensing tubes evenly distributed in the tank body.

6. The energy-saving system for a methylammonium condenser for producing urea according to claim 1, characterized in that: Liquid phase channels are provided between the plurality of first baffles and the plurality of second baffles and the inner wall of the tank body for baffle the liquid, and a plurality of gas phase channels are provided on the plurality of first baffles.

7. The energy-saving system for a methylammonium condenser for producing urea according to claim 6, characterized in that: A leakage groove is provided between one side of the partition and the inner wall of the tank body. The leakage groove and the liquid phase channel on one of the second baffles close to the partition are located on the same side. A baffle is fixedly installed on the top of the leakage groove, and the top of the baffle is inclined toward the center of the tank body.

8. The energy-saving system for a methylammonium condenser for producing urea according to claim 1, characterized in that: The top of the partition is fixedly installed with a heat-insulating sleeve which is slidably sleeved on the outer wall of one end of the U-shaped condensing pipe connected to the lifting plate.

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