Filling device of high-purity triethylene glycol regeneration system

Abstract

The utility model discloses a high-purity triethylene glycol regeneration system filling device which comprises a triethylene glycol buffer tank and a reboiler, the reboiler is connected with the triethylene glycol buffer tank, a preheating pipe is arranged in the triethylene glycol buffer tank, the preheating pipe is connected with a triethylene glycol filling pump, and the triethylene glycol filling pump is connected with the reboiler. The reboiler is connected with a triethylene glycol filling pump, fresh triethylene glycol is filled through the triethylene glycol filling pump, the reboiler is connected with a stripping tower, the stripping tower is connected with a triethylene glycol heat exchanger, and the triethylene glycol heat exchanger is connected to a triethylene glycol buffer tank, so that the fresh triethylene glycol is converted into high-purity lean triethylene glycol, and then the high-purity lean triethylene glycol is cooled and stored in the triethylene glycol buffer tank; the triethylene glycol buffer tank is connected with a high-purity poor triethylene glycol discharge pipe, so that the high-purity poor triethylene glycol is discharged out of the triethylene glycol buffer tank. According to the high-purity triethylene glycol regeneration system filling device provided by the utility model, the phenomenon that due to filling of low-temperature fresh triethylene glycol, temperature distribution in the reboiler is uneven, local high temperature is caused, and the triethylene glycol is thermally decomposed and deteriorated is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of triethylene glycol dehydration process equipment, in particular to a filling device for a high-purity triethylene glycol regeneration system. Background Art

[0002] As a traditional natural gas dehydration process technology, TEG natural gas dehydration technology is widely used in the development of natural gas in oil and gas fields due to its advantages of easy regeneration, high dehydration efficiency and low operating cost. TEG is widely used in the dehydration process of natural gas as a dehydration medium. The purpose of natural gas drying is achieved by absorbing water by lean TEG. At the same time, the rich TEG after water absorption is dehydrated and regenerated into lean TEG through the TEG regeneration system, so as to achieve the recycling of TEG, which greatly reduces the cost of natural gas extraction. The filling port of the traditional TEG dehydration system is located on the reboiler or buffer tank, without other special designs.

[0003] When the TEG filling port is located in the buffer tank, the filling process will affect the regeneration concentration of TEG. When the filling port is located in the reboiler, the fresh TEG will affect the temperature distribution in the reboiler during the filling process, which will have an adverse effect on the temperature control of the electric heater and even cause the reboiler to have excessive power, resulting in local high temperature, causing the TEG to thermally decompose and deteriorate.

[0004] Therefore, it is urgent to design a high-purity triethylene glycol regeneration system filling device to solve the above-mentioned triethylene glycol filling and dehydration problems. Utility Model Content

[0005] In order to solve the technical problems mentioned in the background technology that when the glycol filling port is located in the buffer tank, the filling process will affect the regeneration concentration of triethylene glycol, and when the filling port is located in the reboiler, fresh triethylene glycol will affect the temperature distribution in the reboiler, causing local high temperature, resulting in thermal decomposition and deterioration of triethylene glycol, a high-purity triethylene glycol regeneration system filling device is provided to solve the problems of triethylene glycol filling and dehydration.

[0006] In order to achieve the above-mentioned purpose, the specific technical scheme of the high-purity triethylene glycol regeneration system filling device of the utility model is as follows:

[0007] A high-purity triethylene glycol regeneration system filling device comprises a triethylene glycol buffer tank and a reboiler, wherein the reboiler is connected to the triethylene glycol buffer tank, a preheating pipe is arranged in the triethylene glycol buffer tank, the preheating pipe is connected to a triethylene glycol filling pump, so that fresh triethylene glycol is filled through the triethylene glycol filling pump, the reboiler is connected to a stripping tower, the stripping tower is connected to a triethylene glycol heat exchanger, the triethylene glycol heat exchanger is connected to the triethylene glycol buffer tank, so that fresh triethylene glycol is converted into high-purity lean triethylene glycol and then cooled and stored in the triethylene glycol buffer tank, and the triethylene glycol buffer tank is connected to a high-purity lean triethylene glycol discharge pipe, so that high-purity lean triethylene glycol is discharged from the triethylene glycol buffer tank.

[0008] Furthermore, a preheating pipe is arranged in the triethylene glycol buffer tank along the length direction of the triethylene glycol buffer tank to preheat fresh triethylene glycol.

[0009] Furthermore, both ends of the preheating tube are respectively connected with a filling port and a discharge port, a triethylene glycol filling pump is connected to the preheating tube filling port, and the preheating tube discharge port is connected to the reboiler so that the preheated fresh triethylene glycol flows into the reboiler.

[0010] Furthermore, a liquid diverter pipe is provided in the reboiler, one end of the liquid diverter pipe is connected to the reboiler, and one end of the liquid diverter pipe connected to the reboiler is connected to the discharge port of the preheating pipe.

[0011] Furthermore, a plurality of openings are evenly formed on the liquid diverter pipe, which is arranged in the reboiler along the length direction of the reboiler. Fresh triethylene glycol flows into the reboiler through the openings of the liquid diverter pipe to evenly heat the fresh triethylene glycol.

[0012] Furthermore, the reboiler is provided with a stripping gas inlet, which is connected to the stripping gas outlet of the stripping tower.

[0013] Furthermore, a drain pipe is connected to one end of the reboiler away from the stripping gas inlet, and the drain pipe is connected to one end of the stripping tower away from the air inlet, so that fresh triethylene glycol can be regenerated.

[0014] Furthermore, the stripping tower is connected to a stripping gas inlet, and the stripping gas outlet is connected to the reboiler so that the water vapor is discharged after passing through the reboiler.

[0015] Furthermore, one end of the stripping tower is connected to a triethylene glycol heat exchanger through a connecting pipe to cool the high-purity lean triethylene glycol.

[0016] Furthermore, the triethylene glycol heat exchanger is connected to the triethylene glycol buffer tank so that the high-purity lean triethylene glycol after cooling is stored in the triethylene glycol buffer tank.

[0017] The high-purity triethylene glycol regeneration system filling device of the utility model has the following advantages:

[0018] Fresh triethylene glycol is added to the preheating pipe in the triethylene glycol buffer tank through the triethylene glycol filling pump to preheat the fresh triethylene glycol. The preheated fresh triethylene glycol flows into the reboiler for heating to vaporize the water in the fresh triethylene glycol. The initially dehydrated triethylene glycol flows into the stripping tower for further deep dehydration to convert the fresh triethylene glycol into high-purity lean triethylene glycol. The high-purity lean triethylene glycol is cooled by the triethylene glycol heat exchanger and flows into the triethylene glycol buffer tank for storage. The present application reduces the impact of the triethylene glycol filling process on the regenerated concentration of triethylene glycol, reduces the power demand of the reboiler for the fresh triethylene glycol filling process, and reduces the probability of the regenerated concentration of triethylene glycol failing to meet the standard due to local low temperature; the diverter pipe design of the filling device avoids the failure of the regenerated concentration of high-purity lean triethylene glycol to meet the standard due to the filling of low-temperature fresh triethylene glycol, and even avoids the thermal decomposition and deterioration of fresh triethylene glycol due to local high temperature caused by uneven temperature distribution in the reboiler. The design utilizes the internal volume of the buffer tank to preheat the fresh triethylene glycol without occupying external space, thus achieving a compact structure, improving the platform space utilization rate, and reducing the overall construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the flow of the filling device of the high-purity triethylene glycol regeneration system of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the reboiler of the filling device of the high-purity triethylene glycol regeneration system of the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the triethylene glycol buffer tank of the filling device of the high-purity triethylene glycol regeneration system of the utility model.

[0022] Description of the markings in the figure:

[0023] 1. TEG buffer tank; 2. Reboiler; 3. Preheating tube; 4. TEG filling pump; 5. Stripping tower; 6. TEG heat exchanger; 7. High-purity lean TEG discharge pipe; 8. Liquid diversion pipe; 9. Stripping gas inlet. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0025] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0026] Please refer to the attached Figure 1 To Attachment Figure 3 The utility model is described as a filling device for a high-purity triethylene glycol regeneration system.

[0027] like Figure 1 and Figure 2 As shown, the high-purity triethylene glycol regeneration system filling device in the utility model includes a triethylene glycol buffer tank 1 and a reboiler 2, the reboiler 2 is connected to the triethylene glycol buffer tank 1, a preheating pipe 3 is provided in the triethylene glycol buffer tank 1, the preheating pipe 3 is connected to the triethylene glycol filling pump 4, so that fresh triethylene glycol is filled through the triethylene glycol filling pump 4, the reboiler 2 is connected to the stripping tower 5, the stripping tower 5 is connected to the triethylene glycol heat exchanger 6, the triethylene glycol heat exchanger 6 is connected to the triethylene glycol buffer tank 1, so that the fresh triethylene glycol is converted into high-purity lean triethylene glycol and then cooled and stored in the triethylene glycol buffer tank 1, the triethylene glycol buffer tank 1 is connected to the high-purity lean triethylene glycol discharge pipe 7, so that the high-purity lean triethylene glycol is discharged from the triethylene glycol buffer tank 1.

[0028] Fresh triethylene glycol is added to the preheating pipe 3 in the triethylene glycol buffer tank 1 through the triethylene glycol filling pump 4 to preheat the fresh triethylene glycol. The preheated fresh triethylene glycol flows into the reboiler 2 for primary heating to vaporize the water in the fresh triethylene glycol and flows into the stripping tower 5 for further vaporization and separation to convert the fresh triethylene glycol into high-purity lean triethylene glycol. The high-purity lean triethylene glycol is cooled by the triethylene glycol heat exchanger and flows into the triethylene glycol buffer tank 1 for storage. The present application reduces the impact of the triethylene glycol filling process on the regenerated concentration of triethylene glycol, reduces the power demand of the reboiler 2 for the fresh triethylene glycol filling process, and reduces the probability of the triethylene glycol regeneration concentration not meeting the standard due to local low temperature; the design of the liquid diversion pipe 8 of the filling device avoids the high-purity lean triethylene glycol regeneration concentration not meeting the standard due to the filling of low-temperature fresh triethylene glycol, and even avoids the uneven temperature distribution in the reboiler 2 causing local high temperature, resulting in the thermal decomposition and deterioration of triethylene glycol, and the design utilizes the internal volume of the buffer tank to preheat the fresh triethylene glycol without occupying external space, thereby realizing a compact structure, improving the platform space utilization rate, and reducing the overall construction cost.

[0029] Further, if Figure 1 and Figure 3As shown, the preheating tube 3 is arranged in the triethylene glycol buffer tank 1 along the length direction of the triethylene glycol buffer tank 1 to preheat the fresh triethylene glycol; the two ends of the preheating tube 3 are respectively connected with a filling port and a discharge port, the triethylene glycol filling pump 4 is connected to the filling port of the preheating tube 3, and the discharge port of the preheating tube 3 is connected to the reboiler 2, so that the preheated fresh triethylene glycol flows into the reboiler 2; a liquid diverter tube 8 is provided in the reboiler 2, one end of the liquid diverter tube 8 is connected to the reboiler 2, and one end of the liquid diverter tube 8 and the reboiler 2 is connected to the discharge port of the preheating tube 3.

[0030] In this embodiment, preferably, the preheating pipe 3 is arranged at the lower end of the inside of the triethylene glycol buffer tank 1 and is extended along the length direction of the triethylene glycol buffer tank 1 to fully preheat the fresh triethylene glycol added to the preheating pipe 3. A filling port and a discharge port are respectively provided at both ends of the preheating pipe 3. The filling port of the preheating pipe 3 is connected to the triethylene glycol filling pump 4 to allow fresh triethylene glycol to flow into the preheating pipe 3. The fresh triethylene glycol preheated by the preheating pipe 3 flows into the reboiler 2 through the discharge port to achieve preliminary dehydration of the fresh triethylene glycol.

[0031] A liquid diversion pipe 8 is provided at the upper end of the reboiler 2. Fresh triethylene glycol preheated by the preheating pipe 3 flows into the liquid diversion pipe 8 and then flows into the reboiler 2. The reboiler 2 performs preliminary vaporization and dehydration on the fresh triethylene glycol. The preheating pipe 3 reduces the influence of the regeneration concentration of high-purity lean triethylene glycol, reduces the power demand of the reboiler during the fresh triethylene glycol filling process, and reduces the probability of the regeneration concentration of triethylene glycol failing to meet the standard due to local low temperature.

[0032] Further, if Figure 1 and Figure 2 As shown, a plurality of openings are evenly provided on the liquid diverter pipe 8, and the liquid diverter pipe 8 is arranged inside the reboiler 2 along the length direction of the reboiler 2. Fresh triethylene glycol flows into the reboiler 2 from the openings of the liquid diverter pipe 8 to evenly heat the fresh triethylene glycol. The reboiler 2 is provided with a stripping gas inlet, which is connected to the stripping gas outlet of the stripping tower 5. The end of the reboiler 2 away from the stripping gas inlet is connected to a drain pipe, which is connected to the end of the stripping tower 5 away from the air inlet to regenerate the fresh triethylene glycol.

[0033] In this embodiment, the liquid diverter pipe 8 is provided with a plurality of openings, and the liquid diverter pipe 8 is arranged in the reboiler 2 along the length direction of the reboiler 2. The preheated fresh triethylene glycol flows into the reboiler 2 through the openings on the liquid diverter pipe 8, so that the fresh triethylene glycol is heated evenly, avoiding local low temperature and causing the regeneration concentration to fail to meet the standard.

[0034] A stripping gas inlet is provided at the top of the reboiler 2, which is connected to the stripping gas outlet of the stripping tower 5. A liquid discharge pipe is provided on the reboiler 2 to allow the liquid fresh triethylene glycol in the reboiler 2 to flow into the stripping tower 5, and the stripping tower 5 performs deep dehydration.

[0035] Further, if Figure 1 As shown, the stripping tower 5 is connected to a stripping gas inlet 9, and the stripping gas outlet is connected to the reboiler so that water vapor can be discharged after passing through the reboiler 2; one end of the stripping tower 5 is connected to the triethylene glycol heat exchanger 6 through a connecting pipe to cool the high-purity lean triethylene glycol; the triethylene glycol heat exchanger 6 is connected to the triethylene glycol buffer tank 1 so that the cooled high-purity lean triethylene glycol is stored in the triethylene glycol buffer tank 1.

[0036] In this embodiment, the stripping tower 5 is connected to a stripping gas inlet 9, and the stripping gas outlet is connected to the reboiler so that water vapor is discharged after passing through the reboiler. The stripping tower 5 is connected to the triethylene glycol heat exchanger 6, and the triethylene glycol heat exchanger 6 cools the high-purity lean triethylene glycol. The cooled high-purity lean triethylene glycol flows from the triethylene glycol heat exchanger 6 into the triethylene glycol buffer tank 1 to store the high-purity lean triethylene glycol.

[0037] The working principle of the high-purity triethylene glycol regeneration system filling device in the utility model is as follows:

[0038] Fresh triethylene glycol is added to the preheating pipe 3 in the triethylene glycol buffer tank 2 by the triethylene glycol filling pump 5. The preheating pipe 3 preheats the fresh triethylene glycol and then flows into the liquid diversion pipe 8. The fresh triethylene glycol in the liquid diversion pipe 8 flows evenly into the reboiler 2 for heating and dehydration. The fresh triethylene glycol after heating and dehydration flows into the stripping tower 5 for deep dehydration again into high-purity lean triethylene glycol. The water vapor is discharged from the stripping gas outlet connected to the top of the stripping tower 5 after passing through the reboiler. The high-purity lean triethylene glycol flows into the triethylene glycol heat exchanger 6 for cooling. The cooled high-purity lean triethylene glycol flows into the triethylene glycol buffer tank 1 for storage.

[0039] Based on the filling device of the high-purity triethylene glycol regeneration system, the utility model fills fresh triethylene glycol into the preheating pipe 3 in the triethylene glycol buffer tank 1 through the triethylene glycol filling pump 4, so that the fresh triethylene glycol is preheated, and the preheated fresh triethylene glycol flows into the reboiler 2 for heating to vaporize the water in the fresh triethylene glycol, and the initially dehydrated triethylene glycol flows into the stripping tower 5 for further deep dehydration, so that the fresh triethylene glycol is converted into high-purity lean triethylene glycol, and the high-purity lean triethylene glycol is cooled by the triethylene glycol heat exchanger 6 and flows into the triethylene glycol buffer tank 1 for storage. The present application reduces the impact of the triethylene glycol filling process on the regenerated concentration of triethylene glycol, reduces the power demand of the reboiler for the fresh triethylene glycol filling process, and reduces the probability of the triethylene glycol regeneration concentration not meeting the standard due to local low temperature; the design of the liquid diversion pipe 8 inside the reboiler 2 of the filling device avoids the high-purity lean triethylene glycol regeneration concentration not meeting the standard due to the filling of low-temperature fresh triethylene glycol, and even avoids the uneven temperature distribution in the reboiler 3 causing local high temperature, causing the fresh triethylene glycol to thermally decompose and deteriorate, and the design utilizes the internal volume of the buffer tank to preheat the fresh triethylene glycol without occupying external space, thereby realizing a compact structure, improving the platform space utilization rate, and reducing the construction cost of the entire device.

[0040] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A high-purity triethylene glycol regeneration system filling device, characterized in that: The invention comprises a triethylene glycol buffer tank and a reboiler, wherein the reboiler is connected to the triethylene glycol buffer tank, a preheating pipe is arranged in the triethylene glycol buffer tank, the preheating pipe is connected to a triethylene glycol filling pump, so that fresh triethylene glycol is filled through the triethylene glycol filling pump, the reboiler is connected to a stripping tower, the stripping tower is connected to a triethylene glycol heat exchanger, the triethylene glycol heat exchanger is connected to the triethylene glycol buffer tank, so that fresh triethylene glycol is converted into high-purity lean triethylene glycol and then cooled and stored in the triethylene glycol buffer tank, and the triethylene glycol buffer tank is connected to a high-purity lean triethylene glycol discharge pipe, so that high-purity lean triethylene glycol is discharged from the triethylene glycol buffer tank.

2. The high-purity triethylene glycol regeneration system filling device according to claim 1, characterized in that: The preheating pipe is arranged in the triethylene glycol buffer tank along the length direction of the triethylene glycol buffer tank to preheat the fresh triethylene glycol.

3. The high-purity triethylene glycol regeneration system filling device according to claim 2, characterized in that: Both ends of the preheating tube are respectively connected with a filling port and a discharge port, a triethylene glycol filling pump is connected to the preheating tube filling port, and the preheating tube discharge port is connected to the reboiler so that the preheated fresh triethylene glycol flows into the reboiler.

4. The high-purity triethylene glycol regeneration system filling device according to claim 3 is characterized in that: A liquid diverter pipe is arranged in the reboiler, one end of the liquid diverter pipe is connected to the reboiler, and one end of the liquid diverter pipe and the reboiler is connected to the discharge port of the preheating pipe.

5. The high-purity triethylene glycol regeneration system filling device according to claim 4, characterized in that: A plurality of openings are evenly provided on the liquid diverter pipe, which is arranged in the reboiler along the length direction of the reboiler. Fresh triethylene glycol flows into the reboiler through the openings of the liquid diverter pipe to evenly heat the fresh triethylene glycol.

6. The high-purity triethylene glycol regeneration system filling device according to claim 5, characterized in that: The reboiler is provided with a stripping gas inlet, which is connected to the stripping gas outlet of the stripping tower.

7. The high-purity triethylene glycol regeneration system filling device according to claim 6, characterized in that: The end of the reboiler away from the stripping gas inlet is connected with a drain pipe, and the drain pipe is connected to the end of the stripping tower away from the air inlet, so that fresh triethylene glycol can be regenerated.

8. The high-purity triethylene glycol regeneration system filling device according to claim 7, characterized in that: The stripping tower is connected with a stripping gas inlet, and the stripping gas outlet is connected with a reboiler so that water vapor can be discharged after passing through the reboiler.

9. The high-purity triethylene glycol regeneration system filling device according to claim 8, characterized in that: One end of the stripping tower is connected to the triethylene glycol heat exchanger through a connecting pipe to cool the high-purity lean triethylene glycol.

10. The high-purity triethylene glycol regeneration system filling device according to claim 9, characterized in that: The triethylene glycol heat exchanger is connected to the triethylene glycol buffer tank so that the high-purity lean triethylene glycol after cooling is stored in the triethylene glycol buffer tank.

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