Triethylene glycol dehydration regeneration tail gas emission device

Abstract

The utility model discloses a triethylene glycol dehydration regeneration tail gas emission device, which is applied to a triethylene glycol dehydration regeneration device, and comprises a chimney arranged on a triethylene glycol reboiler and communicated with an exhaust port of the triethylene glycol reboiler; one end of the emptying pipeline is communicated with a condensate water recovery tank, and the other end of the emptying pipeline is communicated with the chimney, so that gas in the condensate water recovery tank is exhausted through the chimney. Therefore, the waste gas treatment device is small in occupied area, convenient to transport and capable of treating the discharged waste gas and reducing pollution to the environment.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas emission, in particular to a triethylene glycol dehydration and regeneration tail gas emission device. Background Art

[0002] During the dehydration and regeneration process of triethylene glycol, some flammable gases are cooled along with the water vapor in the steam cooler and then enter the condensate recovery tank. As the gas in the recovery tank continues to increase, the pressure continues to rise, and it is necessary to discharge the gas from the recovery tank. Conventional processes use local venting or centralized venting to achieve this.

[0003] Currently, to vent these flammable gases on-site, a separate vent riser is typically installed to reduce the risk to people on the ground from direct flammable gas emissions. The vent port is located above the highest point of the equipment, allowing the gases to be discharged high into the air. This reduces the risk to people on the ground during the discharge. However, installing a separate vent riser requires a large footprint and is inconvenient to transport. Furthermore, direct gas discharge to the air can cause environmental pollution. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, one purpose of the present invention is to provide a triethylene glycol dehydration regeneration tail gas emission device, which occupies a small area, is easy to transport, and can treat the discharged waste gas to reduce pollution to the environment.

[0006] To achieve the above-mentioned purpose, the utility model proposes a triethylene glycol dehydration regeneration tail gas emission device, which is applied to a triethylene glycol dehydration regeneration device, comprising:

[0007] a chimney, the chimney being arranged on the triethylene glycol reboiler and being connected to the exhaust port of the triethylene glycol reboiler;

[0008] A vent pipe, one end of which is connected to the condensate recovery tank, and the other end of which is connected to the chimney, so as to discharge the gas in the condensate recovery tank through the chimney.

[0009] The triethylene glycol dehydration and regeneration tail gas emission device of the present invention utilizes a chimney to discharge the gas generated in the triethylene glycol reboiler, and the vent pipe is connected to the chimney, so that the chimney is also used to discharge the gas discharged from the condensate recovery tank through the vent pipe, and the gas in the triethylene glycol reboiler can also heat the chimney during the discharge process, so that a high-temperature environment is formed inside the chimney. The gas discharged from the vent pipe, such as flammable gas, reduces the emission of harmful substances under high-temperature purification, thereby reducing the pollution caused by the exhaust gas to the environment. At the same time, under the action of the chimney effect, the emission of gas will be accelerated, making the gas discharge more unobstructed. At the same time, the height and diameter of the chimney are both larger than those of conventional vent risers, thereby achieving the purpose of improving the venting effect and enhancing safety performance. The vent pipe merges into the chimney, completely abandoning the tediousness and inconvenience of setting up a separate on-site vent riser in the traditional mode. This change not only simplifies the installation process and reduces the floor space, but also greatly improves the convenience of transportation, achieving the purpose of convenient transportation and saving floor space.

[0010] In addition, the triethylene glycol dehydration and regeneration tail gas emission device proposed in the application may also have the following additional technical features:

[0011] Specifically, a solenoid valve and / or a first manual ball valve is installed on the vent pipeline.

[0012] Specifically, a flame arrester is installed on the vent pipeline.

[0013] Specifically, the flame arrester is arranged near the connection point between the vent pipe and the chimney.

[0014] Specifically, it also includes a vent pipeline, one end of which is connected to the vent pipeline, and the other end of which is connected to the main vent pipeline in the station, and a stop valve is installed on the vent pipeline.

[0015] Specifically, the venting pipeline has a first branch and a second branch. The air outlet of the first branch is communicated with the air inlet of the safety valve, and the air inlet of the second branch is communicated with the air outlet of the safety valve.

[0016] Specifically, the shut-off valve is arranged between the air inlet of the first branch path and the air outlet of the second branch path.

[0017] Specifically, a second manual ball valve is provided on the first branch road; or a second manual ball valve is provided on the first branch road and the second branch road respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 The figure is a schematic structural diagram of a triethylene glycol dehydration and regeneration tail gas emission device according to one embodiment of the present invention.

[0021] As shown in the figure: 1. Chimney; 2. Vent pipe; 3. TEG reboiler; 4. Condensate recovery tank; 5. Vent pipe; 6. TEG regeneration tower; 7. Delivery pipe; 8. Steam cooler; 20. Solenoid valve; 21. First manual ball valve; 22. Flame arrester; 50. First branch; 51. Safety valve; 52. Second branch; 53. Stop valve. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] The following describes the tail gas emission device for dehydration and regeneration of triethylene glycol in accordance with an embodiment of the present invention in conjunction with the accompanying drawings.

[0025] The utility model discloses a triethylene glycol dehydration regeneration tail gas emission device, which can be used in a triethylene glycol dehydration regeneration device. Figure 1The triethylene glycol regeneration tower 6 and the chimney 1 are respectively connected and arranged on the triethylene glycol reboiler 3. The triethylene glycol regeneration tower 6 is connected to the condensate recovery tank 4 through a delivery pipeline 7, and a steam cooler 8 is installed on the delivery pipeline 7. Among them, the triethylene glycol reboiler 3 provides the necessary heat for the triethylene glycol regeneration tower 6, and the triethylene glycol regeneration tower 6 provides an environment for the regeneration reaction of the triethylene glycol rich liquid. The triethylene glycol rich liquid first undergoes a series of pretreatments and enters the triethylene glycol regeneration tower 6. In the triethylene glycol regeneration tower 6, the triethylene glycol reboiler 3 heats the rich liquid to promote the occurrence of the dehydration reaction. The water in the rich glycol is vaporized to form water vapor. The water vapor is liquefied by the steam cooler 8 and enters the condensate recovery tank 4. During the dehydration and regeneration process of triethylene glycol, part of the flammable gas passes through the steam cooler 8 together with the water vapor and enters the condensate recovery tank 4. The gas in the condensate recovery tank 4 continues to increase and the pressure continues to rise. At this time, the gas in the condensate recovery tank 4 needs to be discharged through a separately provided venting riser.

[0026] However, setting up a separate venting riser has the problems of occupying a large area and being inconvenient to transport, and the direct discharge of exhaust gas through the venting riser will also cause environmental pollution.

[0027] In order to solve the above problems, the embodiment of the present invention provides a triethylene glycol dehydration and regeneration tail gas emission device which occupies a small area, is easy to transport, and can treat the discharged waste gas to reduce the pollution to the environment. Figure 1 As shown, the triethylene glycol dehydration regeneration tail gas emission device of the embodiment of the utility model includes: a chimney 1 and a venting pipeline 2.

[0028] Among them, the chimney 1 is arranged on the triethylene glycol reboiler 3 and is connected to the exhaust port of the triethylene glycol reboiler 3. One end of the vent pipe 2 is connected to the condensate recovery tank 4, and the other end of the vent pipe 2 is connected to the chimney 1 to transfer the gas in the condensate recovery tank 4 to the chimney 1 for discharge. Among them, the chimney 1 is used to discharge the gas generated in the triethylene glycol reboiler 3 (such as water vapor, a small amount of alkane alcohol gas), and the vent pipe 2 is connected to the chimney 1, so that the chimney 1 is also used to discharge the gas discharged from the condensate recovery tank 4 from the vent pipe 2, and the gas in the triethylene glycol reboiler 3 can also heat the chimney 1 during the discharge process, so that a high-temperature environment is formed inside the chimney 1, and the gas discharged from the vent pipe 2, such as flammable gas, reduces the emission of harmful substances under high-temperature purification, thereby reducing the pollution caused by the exhaust gas to the environment.

[0029] Secondly, under the action of the chimney 1 effect, the gas discharge will be accelerated, making the gas discharge smoother. At the same time, the height and diameter of the chimney 1 are larger than those of the conventional venting riser, thus achieving the purpose of improving the venting effect and enhancing safety performance.

[0030] At the same time, vent pipe 2 merges into chimney 1, completely eliminating the cumbersome and inconvenient need for a separate local vent riser in the traditional model. This change not only simplifies the installation process and reduces the floor space, but also greatly improves transportation convenience, achieving the goal of convenient transportation and saving floor space.

[0031] In one embodiment of the present invention, Figure 1 As shown, a solenoid valve 20 and / or a first manual ball valve 21 are installed on the vent line 2. For example, the solenoid valve 20 can be separately provided on the vent line 2. The solenoid valve 20 can be used to precisely control the discharge of gas from the vent line 2. Closing the solenoid valve 20 can prevent smoke in the chimney 1 from flowing back into the condensate recovery tank 4 when no gas is discharged from the condensate recovery tank 4.

[0032] It should be noted that the solenoid valve 20 described in this embodiment can be connected to the station control system, thereby realizing remote control / automatic control of on-site venting of the gas in the condensate recovery tank 4, reducing the degree of manual intervention and improving the system's degree of automation and operating efficiency.

[0033] As a possible scenario, a pressure transmitter can be installed on the vent pipe 2, and the pressure transmitters are connected to the station control system respectively. The pressure in the vent pipe 2 can be detected by the pressure transmitter. If the pressure in the condensate recovery tank 4 gradually increases, the pressure in the vent pipe 2 will also increase. When the pressure is greater than the preset pressure value of the pressure transmitter, the station control system controls the solenoid valve 20 to automatically open, relieve the pressure and exhaust, thereby preventing the smoke in the chimney 1 from flowing back into the condensate recovery tank 4.

[0034] For another example, a first manual ball valve 21 can also be separately provided in the vent line 2, wherein the first manual ball valve 21 allows the operator to directly control the opening and closing of the valve by rotating the handle, without relying on electricity or other external energy sources, and instantly cuts off or opens the vent line 2. Moreover, the mechanical structure of the first manual ball valve 21 is relatively simple, without complex electronic components or control systems, and therefore has high reliability and is not prone to failure.

[0035] For another example, the vent line 2 is provided with a solenoid valve 20 and a first manual ball valve 21 at the same time. The first manual ball valve 21 and the solenoid valve 20 are two different types of valves and can serve as backups for each other. When one of the valves fails or needs maintenance, the other valve can still work normally, ensuring the smooth flow and safety of the vent line 2. The dual control mechanism greatly improves the reliability and stability of the system and reduces the risk of system shutdown or accidents caused by a single valve failure.

[0036] The first manual ball valve 21 provides direct manual control capability, while the solenoid valve 20 can achieve remote or automatic control. This design allows operators to flexibly choose the control method according to actual conditions to meet the needs of different working conditions.

[0037] In one embodiment of the present invention, Figure 1 As shown, a flame arrester 22 is installed on the vent line 2. It is understood that the flame arrester 22 can prevent possible flames in the chimney 1 from entering the vent line 2, ensuring that the vent line 2 is protected from direct thermal shock and combustion threats. Its efficient flame-retardant performance protects the vent line 2 and increases its service life.

[0038] In one embodiment of the present invention, Figure 1 As shown, the flame arrester 22 is arranged near the connection point between the vent pipe 2 and the chimney 1. The design near the connection point makes the flame arrester 22 closer to the chimney 1, and the response time is shorter, which can effectively block the spread of flames, further enhance the protection of the vent pipe 2, and make it safer.

[0039] Furthermore, if Figure 1 As shown, the above-mentioned triethylene glycol dehydration and regeneration tail gas emission device also includes a vent pipe 5, one end of the vent pipe 5 is connected to the vent pipe 2, and the other end of the vent pipe 5 is connected to the main vent pipe in the station, and a stop valve 53 is installed on the vent pipe 5. When the triethylene glycol dehydration and regeneration device encounters maintenance and the like, it is necessary to discharge the combustible gas in the triethylene glycol dehydration and regeneration device, so the stop valve 53 is opened and the combustible gas is transported to the main vent pipe through the vent pipe 5 to be discharged.

[0040] In one embodiment of the present invention, Figure 1 As shown, the venting pipeline 5 has a first branch 50 and a second branch 52 . The air outlet of the first branch 50 is connected to the air inlet of the safety valve 51 , and the air inlet of the second branch 52 is connected to the air outlet of the safety valve 51 .

[0041] Specifically, under normal conditions, the stop valve 53 is in a closed state. When the internal pressure of the condensate recovery tank 4 rises abnormally, that is, exceeds the preset threshold of the safety valve 51, the safety valve 51 will automatically start, and the gas in the condensate recovery tank 4 passes through the first branch 50, the safety valve 51 and the second branch 52 in turn, and is finally safely discharged to the vent main pipeline through the vent pipe 5, thereby effectively realizing the pressure relief function and improving safety.

[0042] In one embodiment of the present invention, Figure 1As shown, the stop valve 53 is arranged between the air inlet of the first branch 50 and the air outlet of the second branch 52. This unique layout ensures that the stop valve 53 can play its due role without affecting the normal function of the pressure relief path formed by the first branch 50, the safety valve 51 and the second branch 52. That is, when the triethylene glycol dehydration regeneration device encounters inspection and maintenance, it is necessary to discharge the internal gas. Since the internal pressure of the condensate recovery tank 4 is lower than the preset threshold of the safety valve 51, the safety valve 51 is in a closed state. At this time, the stop valve 53 can be opened to transport the combustible gas to the vent main pipeline through the vent pipe 5 to discharge the combustible gas.

[0043] In one embodiment of the present invention, Figure 1 As shown, a second manual ball valve is provided on the first branch 50. The second manual ball valve can be quickly closed when the safety valve 51 is damaged, effectively blocking the gas inside the first branch 50, thereby strictly preventing gas leakage and ensuring the safe and stable operation of the triethylene glycol dehydration regeneration device.

[0044] Alternatively, a second manual ball valve (not shown) is provided on each of the first branch 50 and the second branch 52. The dual ball valve design allows for more flexible response to various operating conditions and emergencies. For example, if both the second manual ball valve and the safety valve 51 on the first branch 50 malfunction, the second manual ball valve on the second branch 52 can be closed to ensure safe and stable operation of the TEG dehydration and regeneration device.

[0045] In summary, the triethylene glycol dehydration and regeneration tail gas emission device of the embodiment of the present invention occupies a small area, is easy to transport, and can treat the discharged waste gas to reduce pollution to the environment.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0047] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments described herein, but rather to be embodied in the broadest possible manner consistent with the principles and novel features disclosed herein.

Claims

1. A triethylene glycol dehydration and regeneration tail gas emission device, used in a triethylene glycol dehydration and regeneration device, characterized in that: include: a chimney, the chimney being arranged on the triethylene glycol reboiler and being connected to the exhaust port of the triethylene glycol reboiler; A vent pipe, one end of which is connected to the condensate recovery tank, and the other end of which is connected to the chimney, so as to transmit the gas in the condensate recovery tank to the chimney for discharge.

2. The triethylene glycol dehydration and regeneration tail gas emission device according to claim 1, characterized in that: A solenoid valve and / or a first manual ball valve is installed on the vent pipeline.

3. The tail gas emission device for dehydration and regeneration of triethylene glycol according to claim 1, characterized in that: A flame arrester is installed on the vent pipeline.

4. The triethylene glycol dehydration and regeneration tail gas emission device according to claim 3, characterized in that: The flame arrester is arranged adjacent to the connection point between the vent pipe and the chimney.

5. The triethylene glycol dehydration and regeneration tail gas emission device according to claim 1, characterized in that: It also includes a vent pipeline, one end of which is connected to the vent pipeline, and the other end of which is connected to the main vent pipeline in the station, and a stop valve is installed on the vent pipeline.

6. The triethylene glycol dehydration and regeneration tail gas emission device according to claim 5, characterized in that: The venting pipeline has a first branch and a second branch. The air outlet of the first branch is communicated with the air inlet of the safety valve, and the air inlet of the second branch is communicated with the air outlet of the safety valve.

7. The tail gas emission device for dehydration and regeneration of triethylene glycol according to claim 6, characterized in that: The shut-off valve is arranged between the air inlet of the first branch path and the air outlet of the second branch path.

8. The tail gas emission device for dehydration and regeneration of triethylene glycol according to claim 7, characterized in that: A second manual ball valve is provided on the first branch line; or A second manual ball valve is provided on the first branch path and the second branch path respectively.

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