Methanol tail gas recovery device

Abstract

The methanol tail gas recovery device comprises a pretreatment box, a distillation still arranged on one side of the pretreatment box, a condensation recovery box arranged on one side of the distillation still, a liquid inlet pipe arranged on one side of the pretreatment box, and a flow guide pipe A arranged in the pretreatment box. The filter grating is used for filtering and is matched with the motor and the fixed scraping plate, so that the fixed scraping plate scrapes impurities filtered from the filter grating, the permeability of the filter grating is kept, the filtered impurities are intercepted through the filter frame, a worker can conveniently clean the impurities in a centralized mode, and under the cooperation of the communicating pipe B, the filtering effect is good. The heat in the distillation kettle cavity is guided into the pretreatment box to preheat the filtered methanol solution, resources are fully utilized, the rectification and purification efficiency of the methanol solution is improved, the filtered methanol solution is uniformly sprayed under the action of the high-pressure pump, and the methanol gasification efficiency is improved; the methanol gasification efficiency is accelerated.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment, and in particular to a methanol tail gas recovery device. Background Technology

[0002] Electric furnace exhaust gas typically refers to the waste gas generated during metal smelting or heating using an electric furnace. Converting electric furnace exhaust gas into methanol is a way to recover and utilize resources, especially for exhaust gases containing high concentrations of carbon monoxide and hydrogen. The process of synthesizing methanol from electric furnace exhaust gas requires dust removal, compression, purification, shift reaction, decarbonization, synthesis, and distillation to achieve methanol recovery. This method not only helps reduce greenhouse gas emissions but also enables the effective utilization of resources.

[0003] Chinese Patent Publication No. CN217041347U discloses a methanol distillation recovery device, including a distillation kettle. A fixing ring is fixedly connected to the outer surface of the distillation kettle, a fixing plate overlaps the lower surface of the fixing ring, and a support column is fixedly connected to the lower surface of the fixing plate. A motor bracket, a feed pipe, and a distillation connecting pipe are fixedly connected to the upper surface of the distillation kettle. A stirring motor is fixedly connected to the upper surface of the motor bracket, and a stirring shaft is fixedly connected to the output end of the stirring motor. Stirring blades are threaded onto the outer surface of the stirring shaft. A cooling pipe is fixedly connected to the outer surface of the distillation kettle. This methanol distillation recovery device, by setting up a motor bracket, stirring motor, stirring shaft, and stirring blades, facilitates the stirring of the waste liquid in the distillation kettle, allowing for complete methanol evaporation. By setting up a distillation connecting pipe, cooling pipe, cooling chamber, condensation chamber, inlet pipe, and outlet pipe, it facilitates the cooling and collection of vaporized methanol, thus enabling the entire device to conveniently recover methanol through distillation.

[0004] The existing technical solutions described above have the following shortcomings: when the recycling device distills the liquid, a large amount of liquid is added at one time, making it difficult to ensure that the liquid is free of impurities from other processes. If the liquid containing impurities is used to distill and recover methanol, it may affect the quality of the methanol. Therefore, it is necessary to design a methanol tail gas recovery device to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this invention is to overcome the defects of the existing technology. This invention proposes a methanol tail gas recovery device to solve the problem mentioned in the background technology that the quality of methanol may be affected when liquid containing impurities is distilled to recover methanol.

[0006] To solve the above-mentioned technical problems, the technical solution adopted in this utility model is: a methanol tail gas recovery device, comprising: a pretreatment tank, a distillation kettle arranged on one side of the pretreatment tank, a condensation recovery tank arranged on one side of the distillation kettle, an inlet pipe arranged on one side of the pretreatment tank, a guide pipe A arranged inside the pretreatment tank, a baffle plate arranged on the upper surface of the pretreatment tank, a motor arranged on one side of the pretreatment tank, a filter grid arranged between the baffle plate and the inner wall of the pretreatment tank, a filter frame slidably connected to one side of the pretreatment tank, the filter frame being located below one side of the filter grid, a high-pressure pump arranged between the pretreatment tank and the distillation kettle, and the inner wall of the distillation kettle being... The unit is equipped with a guide pipe B. A high-pressure pump connects the pretreatment tank to the interior of guide pipe B through the guide pipe. The interior of the distillation vessel is equipped with a heating plate and a heat conduction cavity. Guide pipe B is located between the heating plate and the heat conduction cavity. An annular connecting sleeve is rotatably connected to the lower surface of guide pipe B. Spray pipes are provided on both sides of the annular connecting sleeve, and a nozzle is provided on one side of the spray pipe. A connecting pipe B is provided at the top of the distillation vessel. The end of the connecting pipe B away from the distillation vessel is connected to the interior of the condensation recovery tank. The interior of the condensation recovery tank is equipped with a condensation plate. The two ends of one side of the outer surface of the condensation recovery tank are respectively provided with outlet A and outlet B.

[0007] Preferably, an installation plate is fixed between the pretreatment tank and the inlet pipe, and a fixed scraper is provided on the upper surface of the installation plate. The fixed scraper has an arc-shaped cross-section, and the upper surface of the fixed scraper is in contact with the lower surface of the filter grid.

[0008] Preferably, there are two sets of nozzles, which are arranged in parallel. The nozzles are distributed at equal intervals with the annular connecting sleeve as the center. The nozzles of the two sets are arranged in opposite directions. The nozzles are connected to the inside of the guide pipe B through the annular connecting sleeve.

[0009] Preferably, a connecting plate is fixed on one side of the nozzle, and the two sets of connecting plates are located on the same horizontal line. A limiting scraper is fixed on the side of the connecting plate near the distillation vessel, and the inner wall of the distillation vessel is in contact with the side of the limiting scraper away from the connecting plate.

[0010] Preferably, the lower surface of the connecting plate is provided with a heating rod, and the lower surface of the heating rod is arranged in the shape of a parallelogram.

[0011] Preferably, a connecting pipe A is provided between the pretreatment box and the distillation kettle, and the connecting pipe A connects the heat conduction cavity to the interior of the pretreatment box.

[0012] Preferably, temperature sensors are installed inside both the distillation vessel and the condensation recovery box, a control panel is installed on one side of the condensation recovery box, and solenoid valves are installed on the outside of the connecting pipe B, outlet A, and outlet B.

[0013] Compared with existing technologies, the beneficial effects of this utility model include:

[0014] The methanol solution is filtered through a filter grid. A motor and a fixed scraper remove impurities from the grid, maintaining its permeability. The filtered impurities are then intercepted by a filter frame for easy cleaning. Through connecting pipe B, heat from the distillation vessel is directed to the pretreatment tank to preheat the filtered methanol solution, maximizing resource utilization and accelerating the distillation process. Simultaneously, the filtered methanol solution is pumped into pipe B via a high-pressure pump. The nozzles, evenly spaced around a ring-shaped connecting sleeve with opposite nozzle orientations, move in a circular motion below pipe B under the high-pressure pump. This ensures uniform spraying of the filtered methanol solution, allowing it to contact the heated air inside the distillation vessel. The presence of a limiting scraper further accelerates methanol vaporization. This combination of preheating and rotating spraying reduces energy consumption and lowers overall operating costs. Attached Figure Description

[0015] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0016] Figure 1 The schematic diagram shows a three-dimensional structural schematic of a recycling device according to one embodiment of the present invention;

[0017] Figure 2 The schematic diagram shows a three-dimensional cross-sectional view of a recycling device according to one embodiment of the present invention;

[0018] Figure 3 The schematic diagram shows a three-dimensional structural diagram of a filter grid distribution according to one embodiment of the present invention;

[0019] Figure 4 The schematic diagram shows a three-dimensional structural diagram of the distribution of the guide tube B according to one embodiment of the present invention;

[0020] Figure 5 The schematic diagram shows a three-dimensional top view of the annular connecting sleeve according to one embodiment of the present invention;

[0021] Figure 6 The diagram schematically illustrates a three-dimensional structural diagram of the limiting scraper distribution according to one embodiment of the present invention.

[0022] The diagram is labeled as follows: 1. Pretreatment tank; 11. Inlet pipe; 12. Guide pipe A; 13. Baffle plate; 2. Distillation vessel; 21. Heating plate; 22. Heat conduction chamber; 221. Connecting pipe A; 23. Connecting pipe B; 3. Condensation recovery tank; 31. Condensation plate; 32. Outlet A; 33. Outlet B; 4. Motor; 41. Filter grid; 42. Filter frame; 43. Mounting plate; 44. Fixed scraper; 5. High-pressure pump; 6. Guide pipe B; 61. Annular connecting sleeve; 62. Spray pipe; 621. Nozzle; 63. Connecting plate; 631. Limiting scraper; 632. Heating rod. Detailed Implementation

[0023] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this utility model and should not be considered as the entirety of this utility model or as a limitation or restriction of its technical solution.

[0024] According to one embodiment of this utility model, combined with Figures 1-6 The diagram shows a methanol tail gas recovery device, comprising: a pretreatment tank 1, a distillation vessel 2 disposed on one side of the pretreatment tank 1, a condensation recovery tank 3 disposed on one side of the distillation vessel 2, an inlet pipe 11 disposed on one side of the pretreatment tank 1, a guide pipe A12 disposed inside the pretreatment tank 1, a partition 13 disposed on the upper surface of the pretreatment tank 1, a motor 4 disposed on one side of the pretreatment tank 1, a filter grid 41 disposed between the partition 13 and the inner wall of the pretreatment tank 1, a filter frame 42 slidably connected to one side of the pretreatment tank 1, the filter frame 42 being located below one side of the filter grid 41, a high-pressure pump 5 disposed between the pretreatment tank 1 and the distillation vessel 2, and a guide pipe B6 disposed inside the distillation vessel 2. The pretreatment tank 1 is connected to the interior of the guide pipe B6 through the guide pipe. The interior of the distillation vessel 2 is equipped with a heating plate 21 and a heat conduction cavity 22. The guide pipe B6 is located between the heating plate 21 and the heat conduction cavity 22. The lower surface of the guide pipe B6 is rotatably connected to an annular connecting sleeve 61. The annular connecting sleeve 61 is equipped with spray pipes 62 on both sides. The spray pipe 62 is equipped with a nozzle 621 on one side. The top of the distillation vessel 2 is equipped with a connecting pipe B23. The end of the connecting pipe B23 away from the distillation vessel 2 is connected to the interior of the condensation recovery tank 3. The interior of the condensation recovery tank 3 is equipped with a condensation plate 31. The two ends of one side of the outer surface of the condensation recovery tank 3 are respectively equipped with an outlet A32 and an outlet B33.

[0025] An installation plate 43 is fixed between the pretreatment tank 1 and the inlet pipe 11. A fixed scraper 44 is provided on the upper surface of the installation plate 43. The fixed scraper 44 has an arc-shaped cross-section. The upper surface of the fixed scraper 44 is in contact with the lower surface of the filter grid 41. Two sets of spray pipes 62 are provided. The two sets of spray pipes 62 are arranged in parallel. The nozzles 621 are evenly distributed with the annular connecting sleeve 61 as the center. The nozzles 621 are arranged in opposite directions. The spray pipes 62 are connected to the inside of the guide pipe B6 through the annular connecting sleeve 61. A connecting plate 63 is fixed on one side of each spray pipe 62. The two sets of connecting plates 63 are located on the same horizontal line. A limiting scraper 631 is fixed on one side near the distillation vessel 2. The limiting scraper 631 is in contact with the inner wall of the distillation vessel 2 on the side away from the connecting plate 63. A heating rod 632 is provided on the lower surface of the connecting plate 63. The lower surface of the heating rod 632 is arranged in the shape of a parallelogram. A connecting pipe A221 is provided between the pretreatment box 1 and the distillation vessel 2. The connecting pipe A221 connects the heat conduction chamber 22 to the inside of the pretreatment box 1. Temperature sensors are provided inside the distillation vessel 2 and inside the condensation recovery box 3. A control panel is provided on one side of the condensation recovery box 3. Solenoid valves are provided on the outside of the connecting pipe B23, outlet A32 and outlet B33.

[0026] In this embodiment, when the recovery device needs to be used, the compressed crude methanol liquid is introduced into the pretreatment tank 1 through the inlet pipe 11 and the guide pipe A12. The distillation kettle 2 and motor 4 are turned on through the control panel. The crude methanol is filtered through the filter grid 41. With the help of the motor 4 and the fixed scraper 44, the fixed scraper 44 scrapes off the impurities filtered down the filter grid 41, maintaining the permeability of the filter grid 41. The filtered impurities are intercepted by the filter frame 42, which is convenient for the staff to clean. With the help of the connecting pipe A221, the heat inside the distillation kettle 2 is directed to the interior of the pretreatment tank 1 to preheat the filtered methanol solution, making full use of resources and accelerating the efficiency of methanol solution distillation and purification. At the same time, the filtered methanol solution is introduced into the guide pipe B through the guide pipe connected to the high-pressure pump 5. Inside the flow guide tube B6, the nozzles 621 are evenly spaced around the annular connecting sleeve 61, with the two sets of nozzles 621 having opposite spray directions. Under the action of the high-pressure pump 5, the nozzles 621 move in a circular motion around the annular connecting sleeve 61 below the flow guide tube B6, so that the filtered methanol solution is evenly sprayed and comes into uniform contact with the hot air inside the heated distillation vessel 2. With the limit scraper 631 in contact with the solution, the methanol vaporization efficiency is accelerated. When the temperature inside the distillation vessel 2 is above the boiling point of methanol, the solenoid valve outside the connecting pipe B23 is opened through the control panel, so that the vaporized methanol enters the condensation recovery tank 3 for condensation, which facilitates the recovery of the methanol solution and improves the purity of methanol. Through preheating and uniform spraying by rotation, the efficiency of methanol vaporization is accelerated, the use of electricity is reduced, and the overall operating cost is lowered.

[0027] The scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A methanol tail gas recovery device, characterized in that, include: The pretreatment tank includes a distillation vessel on one side, a condensation recovery tank on one side of the distillation vessel, an inlet pipe on one side of the pretreatment tank, a flow guide pipe A inside the pretreatment tank, a partition on the upper surface of the pretreatment tank, a motor on one side of the pretreatment tank, a filter grid between the partition and the inner wall of the pretreatment tank, a filter frame slidably connected to one side of the pretreatment tank, the filter frame being located below the filter grid on one side, a high-pressure pump between the pretreatment tank and the distillation vessel, and a flow guide pipe B inside the distillation vessel. The high-pressure pump is connected to the flow guide pipe. The pretreatment tank is connected to the interior of the guide pipe B. The interior of the distillation vessel is equipped with a heating plate and a heat conduction cavity. The guide pipe B is located between the heating plate and the heat conduction cavity. An annular connecting sleeve is rotatably connected to the lower surface of the guide pipe B. Spray pipes are provided on both sides of the annular connecting sleeve, and a nozzle is provided on one side of the spray pipe. A connecting pipe B is provided at the top of the distillation vessel. The end of the connecting pipe B away from the distillation vessel is connected to the interior of the condensation recovery box. A condensation plate is provided inside the condensation recovery box. Outlet A and outlet B are respectively provided at both ends of one side of the outer surface of the condensation recovery box.

2. The methanol tail gas recovery device according to claim 1, characterized in that, An installation plate is fixed between the pretreatment tank and the inlet pipe, and a fixed scraper is provided on the upper surface of the installation plate. The fixed scraper has an arc-shaped cross-section, and the upper surface of the fixed scraper is in contact with the lower surface of the filter grid.

3. The methanol tail gas recovery device according to claim 1, characterized in that, The nozzle is provided in two sets, which are arranged in parallel. The nozzles are distributed at equal intervals with the annular connecting sleeve as the center. The nozzles of the two sets are arranged in opposite directions. The nozzles are connected to the inside of the guide pipe B through the annular connecting sleeve.

4. The methanol tail gas recovery device according to claim 1, characterized in that, A connecting plate is fixed to one side of each nozzle. The two sets of connecting plates are located on the same horizontal line. A limiting scraper is fixed to the side of each connecting plate near the distillation vessel. The side of the limiting scraper away from the connecting plate is in contact with the inner wall of the distillation vessel.

5. The methanol tail gas recovery device according to claim 4, characterized in that, The lower surface of each connecting plate is provided with a heating rod, and the lower surface of the heating rod is arranged in the shape of a parallelogram.

6. The methanol tail gas recovery device according to claim 1, characterized in that, A connecting pipe A is provided between the pretreatment box and the distillation vessel, and the connecting pipe A connects the heat conduction cavity to the interior of the pretreatment box.

7. The methanol tail gas recovery device according to claim 1, characterized in that, Temperature sensors are installed inside both the distillation vessel and the condensation recovery box. A control panel is installed on one side of the condensation recovery box. Solenoid valves are installed on the outside of the connecting pipe B, outlet A, and outlet B.

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