A feed feeding device for crude methanol distillation

Abstract

This utility model discloses a feed guiding device for crude methanol distillation, belonging to the field of crude methanol synthesis technology. It includes: a feed pipe, with both ends connected to the outlet of the synthesis section and the inlet of the distillation section, respectively; a heating component disposed on the surface of the feed pipe; and a heat insulation component disposed on the surface of the feed pipe. Both ends of the heat insulation component are sealed to the surface of the feed pipe. By directly connecting the outlet of the synthesis section and the inlet of the distillation section through the feed pipe, the intermediate tank area in the traditional process is eliminated, completely avoiding the methanol loss problem caused by flash evaporation of the breather valve when crude methanol is stored in the intermediate tank area, effectively improving the raw material utilization rate.

Description

Technical Field

[0001] This utility model relates to the field of crude methanol synthesis technology, specifically a feed guiding device for crude methanol distillation. Background Technology

[0002] Traditional processes require that crude methanol produced in the synthesis section be depressurized and then transported to the intermediate tank area, where it undergoes buffering, regulation, and initial flash evaporation before being pumped to the distillation section for purification. However, this process has significant drawbacks. For example, when crude methanol is stored in the intermediate tank area, some methanol will flash out through the breather valve at the top of the tank, resulting in raw material loss and reduced system resource utilization. In view of this, a feed pipe was designed to reduce methanol loss and directly deliver crude methanol to the distillation section instead of the intermediate tank. Utility Model Content

[0003] To address the problems of existing technologies, this utility model provides a feed guiding device for crude methanol distillation, comprising: The feed pipe is connected at both ends to the outlet of the synthesis section and the feed end of the distillation section, respectively. A heating element is disposed on the surface of the feed tube; A heat insulation component is disposed on the surface of the feed tube; Both ends of the insulation component are respectively sealed to the surface of the feed tube.

[0004] Furthermore, the heating component is a heating tube, which is spirally disposed on the surface of the feed tube and connected to an external controller.

[0005] Furthermore, the surface of the feed tube is provided with a spiral groove adapted to the position of the heating tube, and the heating tube is disposed in the spiral groove.

[0006] Furthermore, the insulation component includes: a first insulation shell, a second insulation shell, and a third insulation shell; The first heat-insulating shell is arranged along the spiral trajectory of the heating tube, and the size of the first heat-insulating shell is larger than the size of the heating tube. The first heat-insulating shell is sealed to the material guide tube. The two ends of the second insulation shell are respectively sealed to the surface of the feed tube, and the second insulation shell covers the first insulation shell; The two ends of the third insulation shell are respectively sealed to the surface of the feed tube, and the third insulation shell covers the second insulation shell.

[0007] Furthermore, there is a gap between the first insulation shell and the second insulation shell, a gap between the second insulation shell and the third insulation shell, and foam board is filled between the second insulation shell and the third insulation shell.

[0008] Furthermore, the first and third insulation shells are made of metal, while the second insulation shell is made of vacuum insulation board material.

[0009] Furthermore, a flow guide shell is provided on the surface of the third insulation shell, and the two ends of the flow guide shell are sealed to the third insulation shell; A flow guide tube is provided inside the flow guide shell. The two ends of the flow guide tube pass through the third insulation shell and the second insulation shell in sequence. One end of the flow guide tube is located in the middle of the material guide tube, and the other end of the flow guide tube is located near the end of the material guide tube.

[0010] The beneficial effects of this utility model are: By directly connecting the discharge end of the synthesis section and the feed end of the distillation section through the feed pipe, the intermediate tank area in the traditional process is eliminated, which completely avoids the methanol loss caused by flash evaporation of the breather valve when crude methanol is stored in the intermediate tank area, and effectively improves the utilization rate of raw materials.

[0011] The device is equipped with a spirally arranged heating tube, and the surface of the feed pipe has a spiral groove adapted to the heating tube, so that the heating tube and the feed pipe have a closer contact and more uniform heating. At the same time, the heating tube is connected to an external controller, which can flexibly adjust the temperature and effectively prevent the crude methanol from condensing and clogging the pipeline due to the temperature drop during long-distance transportation.

[0012] The three-layer structure of the first, second, and third insulation shells, with gaps between the layers, and foam board filling the gap between the second and third insulation shells, wherein the second insulation shell is made of vacuum insulation board material, and the first and third insulation shells are made of metal, the multi-layer insulation design can minimize heat loss in the feed pipe, reduce the energy consumption of the heating component, and ensure the strength of the insulation component.

[0013] The third insulation shell has a flow guide shell and an internal flow guide tube on its surface. One end extends to the middle of the feed tube and the other end is close to the end of the feed tube. This can guide the hot air in the middle of the heat conduction tube to the end, thereby reducing the heat loss at the end connection of the feed tube and reducing the risk of uneven temperature inside the feed tube, which is conducive to the normal operation of the distillation section. Attached Figure Description

[0014] Fig. 1 This is a cross-sectional structural diagram of the material guiding device provided by this utility model; Fig. 2This is a three-dimensional structural diagram of the material guiding device provided by this utility model.

[0015] Figure label: In the diagram: 1 is the feed pipe, 2 is the heating pipe, 3 is the first insulation shell, 4 is the second insulation shell, 5 is the third insulation shell, 6 is the flow guide shell, and 7 is the flow guide pipe. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figs. 1-2 This utility model provides a feeding device for crude methanol distillation, comprising: The feed pipe 1 is detachably connected at both ends to the outlet end of the synthesis section and the feed end of the distillation section, respectively. A heating component is detachably mounted on the surface of the feed tube 1; The heat insulation component is detachably mounted on the surface of the feed pipe 1; Both ends of the insulation component are respectively sealed to the surface of the feed pipe 1.

[0018] In some embodiments, the heating component is a heating tube 2, which is spirally fixed to the surface of the feed tube 1 and connected to an external controller.

[0019] Among them, the feed pipe directly connects the synthesis section and the distillation section, replacing the traditional transportation path of synthesis section-intermediate tank area-distillation section, and completely avoiding the problem of methanol feedstock loss caused by flash evaporation of the breather valve at the top of the storage tank when crude methanol is stored in the intermediate tank area.

[0020] A heating component is disposed on the surface of the feed pipe to heat the crude methanol being transported in the feed pipe, thereby preventing the crude methanol from cooling down due to ambient temperature during long-distance transport and thus avoiding condensation and precipitation of crude methanol that could block the pipeline.

[0021] The insulation component is used to reduce heat loss from the feed pipe to the outside, reduce the energy consumption of the heating component, and ensure the stable temperature of crude methanol in the feed pipe. Both ends of the insulation component are sealed to the surface of the feed pipe to prevent cold air from entering the insulation area through the connection gap between the insulation component and the feed pipe, thus preventing damage to the insulation effect.

[0022] In some embodiments, the surface of the feed tube 1 is provided with a spiral groove adapted to the position of the heating tube 2, and the heating tube 2 is disposed in the spiral groove.

[0023] The heating tube uses a spiral winding structure to ensure full contact between the heating tube and the outer wall of the feed tube, increasing the heat transfer area and achieving uniform heating of the crude methanol in the feed tube, thus avoiding insufficient local heating that could lead to condensation of the crude methanol. Furthermore, the heating tube is electrically connected to an external controller, which can adjust the heating power and temperature of the heating tube according to the crude methanol delivery status.

[0024] In some embodiments, the thermal insulation component includes: a first thermal insulation shell 3, a second thermal insulation shell 4, and a third thermal insulation shell 5; The first heat-insulating shell 3 is arranged along the spiral trajectory of the heating tube 2, and the size of the first heat-insulating shell 3 is larger than the size of the heating tube 2. The first heat-insulating shell 3 is sealed to the material guide tube 1. The two ends of the second insulation shell 4 are respectively sealed to the surface of the feed pipe 1, and the second insulation shell 4 covers the first insulation shell 3; The two ends of the third insulation shell 5 are respectively sealed to the surface of the feed tube 1, and the third insulation shell 5 covers the second insulation shell 4.

[0025] The spiral groove serves two purposes: firstly, it ensures precise positioning of the heating tube on the surface of the feed tube, preventing displacement during transportation, installation, or use of the device and guaranteeing the stability of the fit between the heating tube and the feed tube; secondly, it reduces the gap between the heating tube and the feed tube, improving heat transfer efficiency and allowing the heat generated by the heating tube to be transferred to the inside of the feed tube more quickly and evenly, thus enhancing the heating effect on crude methanol.

[0026] The first insulation shell is sealed to the outer wall of the feed tube, forming a primary insulation space for the heating tube, thus achieving primary insulation against heat leakage.

[0027] The second insulation shell is a cylindrical structure, with its two ends sealed to the surface of the feed pipe, further enhancing the insulation effect and achieving secondary insulation against heat loss.

[0028] The third insulation shell is also a cylindrical structure, with its two ends sealed to the surface of the feed pipe. The third insulation shell completely covers the second insulation shell, forming a three-level insulation protection. Through the multi-layer insulation structure of the first, second and third levels, the heat loss of the feed pipe and heating pipe is minimized. At the same time, the superposition of the multi-layer shell structure enhances the overall impact resistance and deformation resistance of the insulation component.

[0029] In some embodiments, a gap is left between the first insulation shell 3 and the second insulation shell 4, a gap is left between the second insulation shell 4 and the third insulation shell 5, and a foam board is filled between the second insulation shell 4 and the third insulation shell 5.

[0030] The first and second insulation shells are spaced 5-10mm apart, and the second and third insulation shells are spaced 8-15mm apart. A static air layer is formed within the gaps, which utilizes the low thermal conductivity of air to further block heat transfer and enhance the insulation effect. Furthermore, the gap between the second and third insulation shells is filled with flame-retardant foam board. The foam board not only further reduces the heat conduction efficiency but also provides support and protection for the second insulation shell, preventing it from deforming due to external pressure and avoiding heat loss caused by airflow within the gaps.

[0031] In some embodiments, the first insulation shell 3 and the third insulation shell 5 are made of metal, and the second insulation shell 4 is made of vacuum insulation board material.

[0032] The first and third insulation shells are made of 304 stainless steel, which can withstand the vibration, impact and acid and alkali environment of the industrial site, and prevent insulation failure due to structural damage. The second insulation shell is made of vacuum insulation board, which greatly reduces the efficiency of heat conduction and heat convection through the internal vacuum structure, and can effectively reduce the heat transfer from the material guide tube to the outside. Together with the structural support of the first and third metal shells, it achieves the dual functions of high strength protection and efficient insulation.

[0033] In some embodiments, a flow guide shell 6 is fixedly disposed on the surface of the third insulation shell 5, and the two ends of the flow guide shell are sealed to the third insulation shell 5; A flow guide tube 7 is provided inside the flow guide shell 6. The two ends of the flow guide tube 7 pass through the third insulation shell 5 and the second insulation shell 4 in sequence. One end of the flow guide tube 7 is located in the middle of the material guide tube 1, and the other end of the flow guide tube 7 is located near the end of the material guide tube 1.

[0034] Among them, an arc-shaped flow guide shell is fixedly installed on the outer surface of the third insulation shell, and the two ends of the flow guide shell are sealed to the outer wall of the third insulation shell by sealant to form a closed flow guide channel; A high-temperature resistant guide tube is installed inside the guide shell. The two ends of the guide tube pass through the side walls of the third and second insulation shells in sequence and extend into the gap between the first and second insulation shells. One end of the guide tube is located in the middle of the feed tube (corresponding to the middle area of ​​the spiral trajectory of the heating tube), and the other end of the guide tube is located near the end of the feed tube that connects to the distillation section and the synthesis section. With the above structure, the hot air (generated by the heat dissipation of the heating tube) in the gap between the first and second insulation shells can flow from the middle to the end of the feed tube through the guide tube, which can make up for the heat loss caused by the connection of the feed tube end to the external equipment, balance the temperature distribution of the entire feed tube, avoid the crude methanol condensation due to the low temperature at the end of the feed tube, reduce the risk of pipeline blockage, and ensure the stable temperature of the crude methanol entering the distillation section, thus providing a guarantee for the normal operation of the distillation and purification process.

[0035] High-temperature resistant fans or pumps can be installed on the guide pipes for faster flow of hot air. In addition, the guide pipes can be staggered on opposite sides of the feed pipe. One end of each guide pipe is connected to the middle of the corresponding two sides of the feed pipe, and the other end is set near the distillation section and the synthesis section, respectively.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A feed feeding device for crude methanol distillation, characterized in that, include; The feed pipe is connected at both ends to the outlet of the synthesis section and the feed end of the distillation section, respectively. A heating element is disposed on the surface of the feed tube; A heat insulation component is disposed on the surface of the feed tube; Both ends of the insulation component are respectively sealed to the surface of the feed tube.

2. The feed feeding device for crude methanol distillation according to claim 1, characterized in that, The heating component is a heating tube, which is spirally arranged on the surface of the feed tube and connected to an external controller.

3. The feed feeding device for crude methanol distillation according to claim 2, characterized in that, The surface of the feed tube is provided with a spiral groove adapted to the position of the heating tube, and the heating tube is disposed in the spiral groove.

4. The feed feeding device for crude methanol distillation according to claim 2, characterized in that, The thermal insulation component includes: a first thermal insulation shell, a second thermal insulation shell, and a third thermal insulation shell; The first heat-insulating shell is arranged along the spiral trajectory of the heating tube, and the size of the first heat-insulating shell is larger than the size of the heating tube. The first heat-insulating shell is sealed to the material guide tube. The two ends of the second insulation shell are respectively sealed to the surface of the feed tube, and the second insulation shell covers the first insulation shell; The two ends of the third insulation shell are respectively sealed to the surface of the feed tube, and the third insulation shell covers the second insulation shell.

5. The feed feeding device for crude methanol distillation according to claim 4, characterized in that, There is a gap between the first insulation shell and the second insulation shell, and a gap between the second insulation shell and the third insulation shell. Foam board is filled between the second insulation shell and the third insulation shell.

6. The feed feeding device for crude methanol distillation according to claim 4, characterized in that, The first and third insulation shells are made of metal, while the second insulation shell is made of vacuum insulation board.

7. The feed feeding device for crude methanol distillation according to claim 4, characterized in that, The surface of the third insulation shell is provided with a flow guide shell, and the two ends of the flow guide shell are sealed to the third insulation shell; A flow guide tube is provided inside the flow guide shell. The two ends of the flow guide tube pass through the third insulation shell and the second insulation shell in sequence. One end of the flow guide tube is located in the middle of the material guide tube, and the other end of the flow guide tube is located near the end of the material guide tube.

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