Dredging device applied to fused salt coil pipe of rectification equipment

Abstract

The utility model provides a dredging device applied to a fused salt coil pipe of rectification equipment. The dredging device comprises a salt inlet pipe, a salt outlet pipe, a connecting pipe and a liquid inlet pipe, wherein the salt inlet pipe is connected with the fused salt inlets of the coil pipes, the salt outlet pipe is connected with the fused salt outlets of the coil pipes, the connecting pipe is arranged in the heating tank, and the two ends of the connecting pipe are connected with the lower end of the salt inlet pipe and the lower end of the salt outlet pipe respectively, so that high-temperature liquid fused salt flowing out of the coil pipes can enter the salt inlet pipe from the salt outlet pipe to form circulation. When the coil pipes are heated by the heat tracing pipe to melt the fused salt, nitrogen is injected into the first gas pipe of the salt inlet pipe, the nitrogen enters the salt inlet pipe and then is injected into the coil pipes, in the process, the nitrogen is used for pushing the fused salt in the coil pipes to flow, the fused salt can be discharged from the coil pipes and enters the salt outlet pipe in an accelerated mode, and the interiors of the coil pipes are rapidly recovered to be smooth; therefore, the production start-up progress can be accelerated.

Description

Technical Field

[0001] The utility model relates to the field of net flow equipment structure, in particular to a dredging device applied to molten salt coils of distillation equipment. Background Art

[0002] The distillation equipment for producing coated asphalt is externally heated by molten salt coils. Since the solidification point of molten salt is 142°C, the molten salt in the coils needs to be drained after production is stopped to avoid residual molten salt solidifying in the coils and causing pipeline blockage. Since the coils are welded to the outside of the buffer kettle, it is time-consuming and laborious to deal with blocked pipelines, which seriously affects the production start-up progress. To solve this problem, the applicant applied for an easy-to-operate buffer kettle with application number 202321886979.8 on July 18, 2023. This buffer kettle uses a heating pipe arranged under the coil to heat the coil, so that the coil forms a high temperature to melt the solidified molten salt into a liquid state, so that the molten salt can flow out.

[0003] However, due to the spiral structure of the coil, the molten salt flows downward slowly, resulting in a very slow speed in unblocking the coil, which will affect the progress of production to a certain extent. Utility Model Content

[0004] In view of the deficiencies raised by the above background technology, the utility model provides a dredging device for molten salt coils of distillation equipment.

[0005] The utility model adopts the following technical solutions:

[0006] A dredging device for a molten salt coil of a distillation device, the dredging device comprising a salt inlet pipe, a salt outlet pipe, a connecting pipe and a liquid inlet pipe;

[0007] The salt inlet pipe and the salt outlet pipe are both arranged vertically, and the salt inlet pipe is connected to the molten salt inlet of each coil, and the salt outlet pipe is connected to the molten salt outlet of each coil, and the two ends of the connecting pipe are respectively connected to the lower end of the salt inlet pipe and the lower end of the salt outlet pipe, and the lower part of the salt inlet pipe is connected to the first pump body, and the first pump body draws the molten salt below the salt inlet pipe upward to each coil, and the upper end of the salt inlet pipe is connected to the first air pipe, and the first air pipe is connected to the air source;

[0008] The liquid inlet pipe is connected to each heating pipe, the lower end of the liquid inlet pipe is connected to the heating tank, and a second pump body is arranged at the lower end of the liquid inlet pipe near the heating tank, the liquid inlet pipe is bent at a position on the second pump body to form a C-shaped transition elbow, the transition elbow is connected to a second air pipe, the second air pipe is located within the range surrounded by the transition elbow, and the upper end of the second air pipe vertically penetrates into the transition elbow, and the lower end of the second air pipe is connected to an air source.

[0009] In a possible implementation, the second air pipe is provided with a second one-way valve outside the transition elbow.

[0010] In a possible implementation, the upper end of the salt inlet pipe is inserted into a first air pipe, one end of the first air pipe outside the salt inlet pipe is connected to the air source, and a first one-way valve is provided at the position of the salt inlet pipe.

[0011] In a possible implementation, the dredging device also includes an air compressor, and an air outlet of the air compressor outputs the air source.

[0012] In a possible implementation, the upper end of the salt outlet pipe is screwed to a sealing cover.

[0013] From the above description of the structure of the utility model, it can be seen that compared with the prior art, the utility model has the following advantages: when the heating pipe heats the coil to melt the molten salt, the air compressor allows nitrogen to enter the liquid inlet pipe from the second air pipe and circulate upward, thereby promoting the circulation of high-temperature liquid and improving the thermal conductivity of the heating pipe in transferring the temperature to the coil; then nitrogen is injected into the first air pipe, so that the nitrogen enters the salt inlet pipe and then into each coil. In this process, the flow of nitrogen is used to promote the flow of the molten salt in the coil, thereby accelerating the discharge of the molten salt from the coil and entering the salt outlet pipe, so that the inside of each coil is quickly restored to normal, which is conducive to speeding up the progress of production start-up. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the distillation equipment of the utility model from the front perspective.

[0015] Figure 2 for Figure 1 A is an enlarged schematic diagram.

[0016] Figure 3 It is a three-dimensional structural schematic diagram of the distillation equipment of the utility model from the back side perspective.

[0017] Figure 4 The utility model is a schematic diagram of a front view of a distillation device. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0019] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0020] In addition, in the present application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0021] The utility model provides a dredging device for a molten salt coil 2 of a distillation equipment, as shown in the attached Figure 1 and 3 As shown, the dredging device includes a salt inlet pipe 21, a salt outlet pipe 22, a connecting pipe 23, a liquid inlet pipe 31 and an air compressor. The salt inlet pipe 21 and the salt outlet pipe 22 are both arranged vertically, and the salt inlet pipe 21 is connected to the molten salt inlet of each coil 2, and the salt outlet pipe 22 is connected to the molten salt outlet of each coil 2. The connecting pipe 23 is arranged in the heating tank 4, and the two ends of the connecting pipe 23 are respectively connected to the lower end of the salt inlet pipe 21 and the lower end of the salt outlet pipe 22, so that the lower ends of the salt inlet pipe 21 and the salt outlet pipe 22 are connected, so that the high-temperature liquid molten salt flowing out of the coil 2 can enter the salt inlet pipe 21 from the salt outlet pipe 22. In addition, the first pump body 24 is also connected to the bottom of the salt inlet pipe 21, and the first pump body 24 draws the high-temperature liquid molten salt below the salt inlet pipe 21 upward to each coil 2, forming a circulation of the high-temperature liquid molten salt to continuously heat the distillation kettle 1.

[0022] Continue to refer to the attached Figure 1 and 3 , the upper end of the salt inlet pipe 21 is connected to the first air pipe 25, and the air source is injected into the salt inlet pipe 21 from the first air pipe 25. Specifically, a cover is welded to the port at the upper end of the salt inlet pipe 21, and the first air pipe 25 is inserted into the salt inlet pipe 21 through the cover, and the first air pipe 25 is also welded and fixed to the cover. One end of the first air pipe 25 outside the salt inlet pipe 21 is connected to the air outlet of the air compressor through a hose, so that the nitrogen generated by the air compressor can enter the inside of the salt inlet pipe 21. Further, the first air pipe 25 is provided with a first one-way valve 26 at the position of the salt inlet pipe 21, and the first one-way valve 26 is a one-way flow from the outside of the salt inlet pipe 21 to the inside of the salt inlet pipe 21, so that nitrogen can enter the salt inlet pipe 21, and the high-temperature liquid molten salt in the salt inlet pipe 21 cannot be discharged from the first air pipe 25 to the outside.

[0023] When the molten salt condenses and blocks the coil 2, a high-temperature medium of 200-300°C is introduced into the heating pipe 3 to heat the coil 2. When the temperature of the coil 2 reaches above 142°C, the solidified molten salt in the coil 2 gradually melts. At this time, nitrogen can be injected into the first air pipe 25, so that the nitrogen enters the salt inlet pipe 21, and then is poured into each coil 2, and then enters the salt outlet pipe 22 from the molten salt outlet of the coil 2. In this process, the flow of nitrogen is used to promote the flow of the molten salt in the coil 2, thereby accelerating the discharge of the molten salt from the coil 2 and entering the salt outlet pipe 22. It can be seen that this method of blowing is more conducive to quickly unblocking the coil 2 than the method of the molten salt flowing downward naturally.

[0024] It is worth mentioning that if the sealing degree of the first pump body 24 is not enough when it is closed, a two-way flow valve (not shown in the drawings) can be set on the salt inlet pipe 21. When the coil 2 heats the distillation equipment, the valve is opened so that the high-temperature liquid molten salt can circulate between the salt inlet pipe 21, the coil 2, the salt outlet pipe 22 and the connecting pipe 23. When the coil 2 is unblocked, the valve can be closed to prevent the nitrogen injected into the salt inlet pipe 21 by the first gas pipe 25 from being input downward into the connecting pipe 23.

[0025] Continue to refer to the attached Figure 1 and 3 The lower end of the liquid inlet pipe 31 is connected to the heating tank 4, and a second pump body 32 is arranged at the lower end of the liquid inlet pipe 31 near the heating tank 4. The second pump body 32 is used to input the high-temperature liquid in the heating tank 4 into the liquid inlet pipe 31, and then input it into each heating pipe 3, so that the heating pipe 3 transfers the high temperature to the coil 2. When the temperature of the coil 2 reaches above 142°C, the solidified molten salt in the coil 2 gradually melts and flows out, thereby restoring the unobstructed state of the coil 2.

[0026] As attached Figure 1 and 2 As shown, the liquid inlet pipe 31 is bent at a position on the second pump body 32 to form a C-shaped transition elbow 311, and the transition elbow 311 is connected to the second air pipe 33. The second air pipe 33 is located within the range surrounded by the transition elbow 311, and the upper end of the second air pipe 33 vertically penetrates into the transition elbow 311, and the lower end of the second air pipe 33 is connected to the air outlet of the air compressor, so that the nitrogen generated by the air compressor can enter the liquid inlet pipe 31 from the second air pipe 33 and flow upward, thereby promoting the circulation of high-temperature liquid, so as to improve the thermal conductivity of the heating pipe 3 in transferring the temperature to the coil 2. Furthermore, the second air pipe 33 is provided with a second one-way valve 34 outside the transition elbow 311, and the second one-way valve 34 is for one-way flow from the outside of the transition elbow 311 to the inside. At the same time, a one-way valve may also be provided between the transition elbow 311 and the second pump body 32 of the liquid inlet pipe 31, and the one-way valve is for one-way flow from the second pump body 32 to the transition elbow 311, so that the nitrogen entering the second air pipe 33 can only push the high-temperature liquid vertically upward to flow upward to each heating pipe 3.

[0027] In addition, the upper end of the salt outlet pipe 22 is spirally connected to a sealing cover. When the distillation kettle 1 needs to be used, the cover can be unscrewed, and the molten salt melted by heat is poured into the upper end of the salt outlet pipe 22, so that the molten salt quickly flows into the connecting pipe, the salt inlet pipe and each coil, directly close to overflowing, and then the cover can be tightened.

[0028] Preferably, the position of the salt outlet pipe 22 on the heating tank 4 can also be connected to a three-way valve (not shown in the drawings), the three-way valve is a one-inlet and two-outlet valve, and the upper end of the three-way valve is the inlet, and the lower end and the side of the three-way valve are outlets. The outlet on the side of the three-way valve can be connected to the discharge pipe, and the discharge pipe extends out of the side of the heating tank. During operation, by turning the knob of the three-way valve, the inlet of the three-way valve can be adjusted to be connected with the outlet on the side or the outlet at the lower end. When the three-way valve is adjusted to connect the inlet and the outlet at the lower end, the molten salt can enter the connecting pipe downward to form a circulation process; and when the three-way valve is adjusted to connect the inlet and the outlet on the side, the molten salt discharged from the coil to the salt outlet pipe 22 can be discharged from the discharge pipe.

[0029] In summary, when the heating pipe 3 heats the coil 2, the utility model injects nitrogen into the second air pipe 33 so that the nitrogen entering the liquid inlet pipe 31 from the second air pipe 33 can be pushed to circulate upward, thereby promoting the circulation of high-temperature liquid and improving the thermal conductivity of the heating pipe 3 in transferring temperature to the coil 2. Nitrogen is then injected into the first air pipe 25 so that the nitrogen enters the salt inlet pipe 21 and then is poured into each coil 2, and then enters the salt outlet pipe 22 from the molten salt outlet of the coil 2 and is discharged from the discharge pipe. In this process, the flow of nitrogen is used to push the flow of the molten salt in the coil 2, thereby accelerating the discharge of the molten salt from the coil 2 and entering the salt outlet pipe 22, so that the inside of each coil 2 is quickly restored to be unobstructed, which is conducive to speeding up the progress of production start-up.

[0030] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A dredging device for molten salt coils used in distillation equipment, characterized in that: The dredging device comprises a salt inlet pipe, a salt outlet pipe, a connecting pipe and a liquid inlet pipe; The salt inlet pipe and the salt outlet pipe are both arranged vertically, and the salt inlet pipe is connected to the molten salt inlet of each coil, and the salt outlet pipe is connected to the molten salt outlet of each coil, and the two ends of the connecting pipe are respectively connected to the lower end of the salt inlet pipe and the lower end of the salt outlet pipe, and the lower part of the salt inlet pipe is connected to the first pump body, and the first pump body draws the molten salt below the salt inlet pipe upward to each coil, and the upper end of the salt inlet pipe is connected to the first air pipe, and the first air pipe is connected to the air source; The liquid inlet pipe is connected to each heating pipe, the lower end of the liquid inlet pipe is connected to the heating tank, and a second pump body is arranged at the lower end of the liquid inlet pipe near the heating tank, the liquid inlet pipe is bent at a position on the second pump body to form a C-shaped transition elbow, the transition elbow is connected to a second air pipe, the second air pipe is located within the range surrounded by the transition elbow, and the upper end of the second air pipe vertically penetrates into the transition elbow, and the lower end of the second air pipe is connected to an air source.

2. The dredging device according to claim 1, characterized in that: The second air pipe is provided with a second one-way valve outside the transition elbow.

3. The dredging device according to claim 1, characterized in that: The upper end of the salt inlet pipe is inserted into the first air pipe, the first air pipe is connected to the air source at one end outside the salt inlet pipe, and the first air pipe is provided with a first one-way valve at the position of the salt inlet pipe.

4. The dredging device according to any one of claims 1 to 3, characterized in that: The dredging device also includes an air compressor, and the air outlet of the air compressor outputs the air source.

5. The dredging device according to claim 1, characterized in that: The pipe opening at the upper end of the salt outlet pipe is spirally connected to a sealing cover.

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