Methanol rectification waste heat recycling equipment

Abstract

The utility model discloses waste heat recycling equipment for methanol rectification, which relates to the technical field of methanol rectification and comprises a water sump column and a water storage tank, a water inlet and a water outlet are respectively mounted at the upper end and the lower end of the water storage tank, and a water distribution disc and a wet curtain disc are arranged in the water storage tank from top to bottom. The number of the wet curtain discs is multiple, a driving motor is installed at the center point of the bottom end of the water storage box, a transmission rod is installed at the output end of the driving motor, and the transmission rod penetrates through the wet curtain discs in the vertical upward direction; on the basis of cooling water used in the rectification process, heat in the cooling water is transferred into the water storage tank and stored in two heat exchange modes of liquid-to-gas and gas-to-liquid, on the basis, a wet curtain is formed in the flowing process of the cooling water, the contact time between gas and the cooling water is prolonged, and the heat exchange efficiency is improved in the mode.

Description

Technical Field

[0001] The utility model relates to the technical field of methanol distillation, in particular to a device for recovering and utilizing waste heat from methanol distillation. Background Art

[0002] The principle of methanol distillation is to vaporize / condense the methanol mixed solution multiple times to obtain methanol with higher concentration. During the preparation process, the methanol mixed solution is heated to form methanol vapor. After the methanol vapor passes through a low-temperature environment (cooling water), some of the substances in it condense into liquid. The main process is heat exchange, which includes the waste heat resource recovery and utilization process, using waste heat resources as a "new energy".

[0003] Different from the conventional waste heat recovery method of high-temperature flue gas, the temperature of methanol vapor does not exceed 76°C, and according to the distillation principle, part of the heat in the methanol vapor is transferred to the cooling water to "heat up" the cooling water. Because the temperature of the heat source of the cooling water (methanol vapor) is relatively low, the temperature of the cooling water is at a relatively low temperature. Its temperature is not high enough to be directly used as a direct water supply for industrial heating systems. However, a large amount of cooling water will be consumed during the continuous distillation of methanol vapor. If the cooling water is directly discharged and treated, the waste heat energy in it cannot be fully utilized.

[0004] To this end, this application proposes a solution. Utility Model Content

[0005] The utility model aims to provide a device for recovering waste heat from methanol distillation, which is used to solve the problem that the temperature of cooling water generated in the current methanol distillation is low and the heat therein cannot be directly recovered.

[0006] The purpose of the utility model can be achieved by the following technical scheme: a device for recovering waste heat from methanol distillation, comprising a water tank column and a water storage tank, wherein the upper and lower ends of the water storage tank are respectively provided with a water inlet and a water outlet, and a water distribution plate and a wet curtain plate are arranged inside the water storage tank from top to bottom, wherein the number of the wet curtain plates is multiple, and a driving motor is installed at the center point of the bottom end of the water storage tank;

[0007] A transmission rod is installed at the output end of the driving motor, and the transmission rod penetrates the wet curtain disc in a vertical upward direction, and the top of the transmission rod is fixedly connected to the water diversion disc. A ventilation pipe is installed on the water bin column, and the two ends of the ventilation pipe are respectively located on the upper outer wall and the lower outer wall of the water bin column, and the ventilation pipe is located inside the water tank. The cross-sections of the water diversion disc and the wet curtain disc are conical.

[0008] It is further configured as follows: a connector is installed at the upper end of the water distribution tray, the connector is rotatably connected to the water inlet, and a plurality of atomizing nozzles are installed on the connector, and the ends of the atomizing nozzles are located at the lower side of the water distribution tray.

[0009] It is further configured as follows: a plurality of wet curtain openings are provided on the wet curtain disc, the inclinations of the upper surfaces of the plurality of wet curtain discs increase from top to bottom, and the wet curtain discs are rotationally connected to the transmission rod.

[0010] It is further configured as follows: the upper end of the ventilation pipe is connected to the inside of the water tank column, and an interface seat is installed on the lower end of the ventilation pipe, and a booster pump is provided on the upper end of the ventilation pipe for rotational connection between the interface seat and the transmission rod.

[0011] It is further configured as follows: a plurality of air vents are provided on the transmission rod, and the air vents are arranged at positions corresponding to the middle position between the water distribution tray and the wet curtain tray, the middle position between every two adjacent wet curtain trays, and the setting position of the interface seat.

[0012] It is further configured as follows: a drain port is provided at a position of the transmission rod corresponding to the bottom end of the water tank column.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model is based on the cooling water used in the methanol distillation process, and forms two methods of liquid-to-gas and gas-to-liquid. Specifically, the cooling water is made to flow from top to bottom, and in the flow process, the cold air is made to flow from bottom to top. The cold air contacts the cooling water, and the heat of the cooling water is transferred to the cold air. Then, the cold air that "absorbs" the heat "passes" through the water in the water storage tank, and transfers the heat to the water stored in the water storage tank again. In this way, the heat in the cooling water is "transferred" to the water storage tank for storage;

[0015] 2. On the basis of the above, with regard to the flow process of cooling water, firstly, a rotatable water distribution plate and an atomizing nozzle are used to spray the cooling water in the form of mist. The cooling water in the form of "initial temperature" first contacts the cold air for heat exchange. After that, the cooling water passes through multiple wet curtains, flows along the curved surface of the wet curtains and forms a water curtain. The purpose is to increase the contact area between the cooling water and the cold air, and further limit the inclination angle of the wet curtains, so as to limit the contact time between the cooling water and the cold air according to the temperature gradient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of a device for recovering waste heat from methanol distillation proposed by the utility model;

[0018] Figure 2 The utility model proposes a device for recovering waste heat from methanol distillation. Figure 1 sectional view of

[0019] Figure 3 This is a cross-sectional view of a water silo column used in a methanol distillation waste heat recovery and utilization device proposed by the utility model;

[0020] Figure 4 The utility model proposes a device for recovering waste heat from methanol distillation. Figure 3 sectional view of .

[0021] In the figure: 1. water tank column; 2. water outlet; 3. ventilation pipe; 4. water inlet; 5. booster pump; 6. water storage tank; 7. water distribution tray; 8. wet curtain tray; 9. drive motor; 10. interface seat; 11. connector; 12. atomizing nozzle; 13. air vent; 14. transmission rod; 15. water vent. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment 1

[0024] Reference Figures 1 to 4 In this embodiment, a device for recovering waste heat from methanol distillation comprises a water tank column 1 and a water storage tank 6. A water inlet 4 and a water outlet 2 are respectively installed at the upper and lower ends of the water storage tank 6. A water separation tray 7 and a wet curtain tray 8 are arranged inside the water storage tank 6 from top to bottom. The number of wet curtain trays 8 is multiple. A driving motor 9 is installed at the center point of the bottom end of the water storage tank 6.

[0025] A transmission rod 14 is installed at the output end of the driving motor 9, and the transmission rod 14 passes through the wet curtain disc 8 in a vertically upward direction, and the top of the transmission rod 14 is fixedly connected to the water diversion disc 7. A ventilation pipe 3 is installed on the water bin column 1, and the two ends of the ventilation pipe 3 are respectively located on the upper outer wall and the lower outer wall of the water bin column 1, and the ventilation pipe 3 is located inside the water storage tank 6. The cross-sections of the water diversion disc 7 and the wet curtain disc 8 are conical. A connector 11 is installed on the upper end of the water diversion disc 7, and the connector 11 is rotatably connected to the water inlet 4, and a plurality of atomizing nozzles 12 are installed on the connector 11, and the end of the atomizing nozzle 12 is located at the lower side of the water diversion disc 7.

[0026] The upper end of the ventilation pipe 3 is connected to the interior of the water tank column 1, and an interface seat 10 is installed on the lower end of the ventilation pipe 3. The interface seat 10 and the transmission rod 14 are rotatably connected. A booster pump 5 is arranged on the upper end of the ventilation pipe 3.

[0027] Working principle: the water inlet 4 is used as the inlet of cooling water, and the water outlet 2 is used as the outlet of cooling water after heat exchange. During operation, cooling water with a certain temperature flows from the water inlet 4 in a direction from top to bottom. During the flow, cooling water is mainly sprayed downward in the form of mist through multiple atomizing nozzles 12. On this basis, the water distribution plate 7 is driven to rotate by starting the driving motor 9, thereby driving the multiple atomizing nozzles 12 to rotate, so that the initial form of cooling water spraying presents a large area of ​​mist;

[0028] At the same time, the water storage tank 6 is used to store clean water at room temperature, and the booster pump 5 is started to Figure 2 The position shown in the figure is used to illustrate: the gas in the water tank column 1 flows clockwise in the ventilation pipe 3. During the flow, when the gas "flows" into the water tank 6, the gas undergoes a heat exchange process with the clean water at room temperature in the water tank 6, thereby reducing the gas temperature. It can be understood that: the gas blown into the water tank column 1 is in a low-temperature state, and when the low-temperature gas contacts the cooling water, a heat exchange process occurs again, and the heat in the cooling water is transferred to the gas. The gas "flows" into the water tank again, and the heat in the gas is transferred to the water tank 6. In this way, a liquid-to-gas and gas-to-liquid heat exchange method is formed, so that the heat in the cooling water is slowly "accumulated" in the water tank 6.

[0029] Embodiment 2

[0030] A plurality of wet curtain openings are provided on the wet curtain disc 8, the inclination of the upper surfaces of the plurality of wet curtain discs 8 increases from top to bottom, and the wet curtain disc 8 is rotatably connected to the transmission rod 14, and a plurality of groups of air leakage openings 13 are provided on the transmission rod 14, and the setting positions of the air leakage openings 13 correspond to the middle position between the water distribution disc 7 and the wet curtain disc 8, the middle position of every two adjacent wet curtain discs 8, and the setting position of the interface seat 10, and a water leakage opening 15 is provided at the position of the transmission rod 14 corresponding to the bottom end of the inner part of the water silo column 1.

[0031] Working principle: Combination Figure 4 For example, when the cooling water flows out of the water distribution plate 7, its temperature is at a relatively high value. Then, as the cooling water slowly flows downward, its temperature gradually decreases. Therefore, at the relatively highest position (i.e., the position of the water distribution plate 7), the low-temperature gas first contacts the mist-like cooling water to complete the initial heat exchange process.

[0032] However, as mentioned above, the temperature of the cooling water gradually decreases until it is discharged from the water outlet 2, and the wet curtain disc 8 therein does not rotate in conjunction with the transmission rod 14, but the cooling water accumulated on the upper surface of the wet curtain disc 8 flows downward along the wet curtain outlet to form a water curtain shape, so as to increase the contact area between the cooling water and the cold gas by presenting the cooling water in the form of a water curtain and a mist. On this basis, the inclination angle of the upper end of the wet curtain disc 8 is limited. The purpose is: when the inclination angle of the curved surface on the wet curtain disc 8 is small, the flow speed of the cooling water on the upper surface of the wet curtain disc 8 is slow, and vice versa. In this regard, the inclination angle of the wet curtain disc 8 gradually increases from top to bottom, so as to limit the flow speed of the cooling water from top to bottom to gradually increase. The specific reason is: the temperature of the cooling water gradually decreases from top to bottom during the heat exchange process, so the flow speed of the cooling water on the wet curtain disc 8 at the upper side can be delayed, while the flow speed of the cooling water on the wet curtain disc 8 at the lower side can be accelerated.

[0033] To sum up: based on the cooling water used in the distillation process, the heat in the cooling water is transferred to the water storage tank through liquid-to-gas and gas-to-liquid heat exchange methods to store the heat. On the above basis, a wet curtain is formed in the cooling water flow process to increase the contact time between the gas and the cooling water, thereby improving the heat exchange efficiency.

[0034] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A device for recovering waste heat from methanol distillation, comprising a water silo column (1) and a water storage tank (6), characterized in that: The water storage tank (6) is provided with a water inlet (4) and a water outlet (2) at the upper and lower ends thereof, respectively, and a water distribution plate (7) and a wet curtain plate (8) are provided inside the water storage tank (6) from top to bottom, and a plurality of wet curtain plates (8) are provided, and a driving motor (9) is provided at the center point of the bottom end of the water storage tank (6); A transmission rod (14) is installed at the output end of the driving motor (9), the transmission rod (14) penetrates the wet curtain disc (8) in a vertically upward direction, and the top end of the transmission rod (14) is fixedly connected to the water distribution disc (7), a ventilation pipe (3) is installed on the water silo column (1), two ends of the ventilation pipe (3) are respectively located on the upper outer wall and the lower outer wall of the water silo column (1), and the ventilation pipe (3) is located inside the water storage tank (6), and the cross-sections of the water distribution disc (7) and the wet curtain disc (8) are conical.

2. The device for recovering waste heat from methanol distillation according to claim 1, characterized in that: A connector (11) is installed at the upper end of the water separation tray (7), the connector (11) is rotatably connected to the water inlet (4), and a plurality of atomizing nozzles (12) are installed on the connector (11), the ends of the atomizing nozzles (12) are located at the lower side of the water separation tray (7).

3. The device for recovering waste heat from methanol distillation according to claim 1, characterized in that: The wet curtain disc (8) is provided with a plurality of wet curtain openings, the inclination of the upper surfaces of the plurality of wet curtain discs (8) increases from top to bottom, and the wet curtain disc (8) is rotatably connected to the transmission rod (14).

4. The device for recovering waste heat from methanol distillation according to claim 1, characterized in that: The upper end of the ventilation pipe (3) is in communication with the interior of the water tank column (1), and an interface seat (10) is installed at the lower end of the ventilation pipe (3). The interface seat (10) and the transmission rod (14) are rotatably connected. A booster pump (5) is provided at the upper end of the ventilation pipe (3).

5. The device for recovering waste heat from methanol distillation according to claim 4, characterized in that: The transmission rod (14) is provided with a plurality of groups of air leakage ports (13), and the air leakage ports (13) are arranged at positions corresponding to the middle position between the water distribution plate (7) and the wet curtain plate (8), the middle position between every two adjacent wet curtain plates (8), and the setting position of the interface seat (10).

6. The device for recovering waste heat from methanol distillation according to claim 5, characterized in that: The transmission rod (14) is provided with a water drain port (15) at a position corresponding to the bottom end of the interior of the water bin column (1).

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