Electric heating dehydration device for ethylene glycol of oil gas and natural gas

Abstract

The utility model discloses an electric heating dehydration device for ethylene glycol in oil gas, natural gas and the like. The electric heating dehydration device comprises a reboiling assembly, a rectification assembly, a heating assembly and a rich liquid backflow assembly, the rectification assembly is arranged above the reboiling assembly, the heating assembly is connected with the rectification assembly, and the rich liquid backflow assembly is connected with the tail end of the heating assembly and the rectification assembly; the rectification assembly comprises a rectification tower, a rich liquid collection and ventilation assembly is arranged in the rectification tower, the rich liquid collection and ventilation assembly is arranged at the position, close to the reboiling assembly, of the lower end of the rectification tower, and the rich liquid collection and ventilation assembly is used for collecting rich liquid triethylene glycol at the bottom of the rectification tower, so that the rich liquid triethylene glycol enters the heating assembly through gravity to be heated and dehydrated; a rich liquor collecting and ventilating assembly is arranged in a rectifying tower of the rectifying assembly and used for collecting rich liquor triethylene glycol at the bottom of the rectifying tower, the rich liquor enters a heating assembly through gravity to be heated and dehydrated, circulating rectification of the rich liquor is achieved, and therefore water vapor in the rich liquor triethylene glycol is separated.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas refining, and in particular relates to an oil and gas glycol electric heating dehydration device. Background Art

[0002] The natural gas glycol dehydration device in oil and gas fields usually uses a natural gas open flame heating furnace to heat glycol, and its thermal efficiency is generally less than 70%. The generally equipped negative pressure induced draft burner will cause the local temperature of the furnace tube to be too high due to the atmospheric environment. Since the decomposition temperature of triethylene glycol is 206℃, a large amount of triethylene glycol will decompose and deteriorate, which will lead to damage to the furnace tube. At the same time, with the vigorous development of new energy such as photovoltaic power generation and wind power generation in oil and gas fields, the cost of electricity has been greatly reduced. The original gas heating furnace in the oil and gas field has been replaced by electric heating, which will significantly reduce the production cost. The traditional electric heating furnace has a complex structure, high production cost, and cannot reflux the rich liquid, resulting in unsatisfactory glycol dehydration effect. Utility Model Content

[0003] The utility model aims to provide an oil and gas natural gas glycol electric heating dehydration device, which realizes the cyclic distillation of rich liquid by cooperating with a reboiler component, a distillation component, a heating component and a rich liquid reflux component, thereby separating the water vapor in the glycol.

[0004] The utility model is realized by the following technical solutions:

[0005] An oil, gas and natural gas glycol electric heating dehydration device comprises a reboiling component, a distillation component, a heating component and a rich liquid reflux component; the distillation component is arranged above the reboiling component, the heating component is connected to the distillation component, and the rich liquid reflux component is respectively connected to the end of the heating component and the distillation component; the distillation component comprises a distillation tower, a rich liquid collection and ventilation component is arranged in the distillation tower at the lower end of the distillation tower close to the reboiling component, and the rich liquid collection and ventilation component is used to collect the rich liquid triethylene glycol at the bottom of the distillation tower so that it enters the heating component by gravity for heating and dehydration.

[0006] Furthermore, a water vapor outlet is provided at the top of the distillation tower, and a cold night outlet, a cold night inlet and a rich liquid distillation inlet are sequentially provided below the water vapor outlet, and the rich liquid collection and ventilation component is provided between the rich liquid distillation inlet and the reboiler component.

[0007] Furthermore, the rich liquid collection and ventilation assembly includes a barrel cover, a liquid collection tank, and a liquid collection and ventilation umbrella cap. The barrel cover is connected to the end of the distillation tower. A liquid collection and ventilation umbrella cap is arranged inside the barrel cover. The liquid collection and ventilation umbrella cap is an inverted conical structure. A liquid collection tank is arranged below the liquid collection and ventilation umbrella cap. The liquid collection tank is an annular groove structure, and its edge is connected to the barrel cover. A gas inlet and a rich liquid outlet are arranged on the side of the barrel cover. The gas inlet is arranged on the side wall of the barrel cover above the liquid collection and ventilation umbrella cap, and the rich liquid outlet is arranged on the side wall of the barrel cover on the side of the liquid collection tank.

[0008] Furthermore, the heating assembly includes a heating power control unit, a kettle-type electric heater and a liquid level gauge, the heating power control unit is arranged at the end of the kettle-type electric heater, the liquid level gauge is arranged at the tail of the kettle-type electric heater, and the kettle-type electric heater is provided with an electric heating tube and a liquid baffle plate, the liquid baffle plate is arranged behind the electric heating tube, and the top of the liquid baffle plate is spaced apart from the top inner wall of the kettle-type electric heater.

[0009] Furthermore, a gas phase balance pipe is provided at the top of the kettle type electric heater, and the gas phase balance pipe is connected to the gas inlet.

[0010] Furthermore, a rich liquid inlet pipe is provided on the kettle-type electric heater below the electric heating pipe, the rich liquid inlet pipe is connected to the rich liquid outlet, and a shut-off valve is provided on the rich liquid inlet pipe.

[0011] Furthermore, a heating rich liquid inlet is provided on the cylinder cover below the liquid accumulation tank; the rich liquid reflux assembly includes a rich liquid outflow pipe and a lifting pump, the lifting pump is arranged in the middle of the rich liquid outflow pipe, and the rich liquid outflow pipe is respectively connected to the heating rich liquid inlet and the end of the kettle electric heater.

[0012] Furthermore, one end of the lift pump is connected to a frequency conversion controller.

[0013] Furthermore, the reboiler assembly includes a reboiler and a stripping column, wherein the stripping column is arranged at one end of the reboiler, and a chimney is arranged at the other end of the reboiler, and a burner interface is arranged below the chimney.

[0014] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0015] 1) In the utility model, a reboiling component, a distillation component, a heating component and a rich liquid reflux component are matched, and a rich liquid collecting and venting component is provided in the distillation tower of the distillation component. The rich liquid collecting and venting component is provided at the lower end of the distillation tower near the reboiling component. The rich liquid collecting and venting component is used to collect the rich liquid triethylene glycol at the bottom of the distillation tower, so that it enters the heating component by gravity for heating and dehydration, thereby realizing the cyclic distillation of the rich liquid, thereby separating the water vapor in the rich liquid triethylene glycol.

[0016] 2) In the utility model, a liquid baffle plate and an electric heating tube are provided in the kettle type electric heater, and the liquid baffle plate is used to control the liquid level at the position of the electric heating tube in the kettle type electric heater, so that the electric heating tube is heated below the liquid level, and a rich liquid inlet pipe is provided at the bottom of the kettle type electric heater, and a shut-off valve is provided on the rich liquid inlet pipe, which can control the supply and on-off of the rich liquid and maintain the heating efficiency of the kettle type spot heating furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a schematic diagram of the structural principle of the utility model oil, gas and natural gas glycol electric heating dehydration device.

[0019] Wherein: 1-reboiler, 11-stripping column, 12-chimney, 2-distillation tower, 21-water vapor outlet, 22-cold night inlet, 23-cold night outlet, 24-rich liquid distillation inlet, 3-rich liquid collection and ventilation assembly, 31-cylinder cover, 32-liquid collection and ventilation umbrella cap, 33-liquid accumulation tank, 34-gas inlet, 35-rich liquid outlet, 4-kettle type electric heater, 41-electric heating tube, 42-liquid baffle, 43-liquid level gauge, 5-gas phase balance tube, 6-rich liquid inlet pipe, 61-shut-off valve, 7-rich liquid outlet, 8-rich liquid outflow pipe, 9-lifting pump. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0021] Embodiment 1:

[0022] The main structure of this embodiment is an oil, gas, natural gas and glycol electric heating dehydration device, such as Figure 1As shown, it includes a reboiling component, a distillation component, a heating component and a rich liquid reflux component; the distillation component is arranged above the reboiling component, the distillation component is used for rich liquid collection and gas separation, the heating component is connected to the distillation component, and the rich liquid reflux component is connected to the end of the heating component and the distillation component respectively; the distillation component includes a distillation tower 2, and a rich liquid collecting and venting component 3 is arranged in the distillation tower 2, the rich liquid collecting and venting component 3 is arranged at the lower end of the distillation tower 2 near the reboiling component, the side of the rich liquid collecting and venting component is connected to the heating component, and the rich liquid collecting and venting component 3 is used to collect the rich liquid triethylene glycol at the bottom of the distillation tower 2, so that it enters the heating component by gravity for heating and dehydration;

[0023] A water vapor outlet 21 is provided at the top of the distillation tower 2, and a cold night outlet 23, a cold night inlet 22 and a rich liquid distillation inlet 24 are sequentially provided below the water vapor outlet 21. The cold night inlet 22 and the cold night outlet 23 are connected with a cold liquid pipe inside the distillation tower 2. The cold liquid pipe condenses the evaporated glycol water vapor and then enters the heating evaporation cycle for purification. The excess water vapor can evaporate through the water vapor outlet 21; the rich liquid flows into the reboiling component from the rich liquid distillation inlet 24 for continuous heating and evaporation purification; the rich liquid collection and ventilation component 3 is arranged between the rich liquid distillation inlet 24 and the reboiling component; the rich liquid collection and ventilation component 3 includes a barrel cover 31, a liquid accumulation tank 33, and a liquid collection and ventilation umbrella cap 32. The barrel cover 31 is a cylindrical structure, and the barrel cover 31 is connected to the terminal end of the distillation tower 2. The barrel cover 31 is provided with a liquid collection and ventilation umbrella cap 32. The cap 32 is an inverted conical structure, and a liquid accumulation groove 33 is arranged below the liquid collection and ventilation umbrella cap 32. The liquid accumulation groove 33 is an annular groove structure, and its edge is connected to the cylinder cover 31. A small amount of evaporated water vapor and glycol gas can enter the liquid accumulation groove 33 after being collected by the liquid collection and ventilation umbrella cap 32, and flow into the heating component to be heated and separated from the water vapor; a gas inlet 34 and a rich liquid outlet 735 are arranged on the side of the cylinder cover 31, the gas inlet 34 is arranged on the side wall of the cylinder cover 31 above the liquid collection and ventilation umbrella cap 32, and the rich liquid outlet 735 is arranged on the side wall of the cylinder cover 31 on one side of the liquid accumulation groove 33 and is connected to the liquid accumulation groove 33; the reboiler assembly includes a reboiler 1 and a stripping column 11, the stripping column 11 is arranged at one end of the reboiler 1, and a chimney 12 is arranged at the other end of the reboiler 1, and a burner interface is arranged below the chimney 12 for plugging in the burner.

[0024] Embodiment 2:

[0025] On the basis of the above embodiments, the present embodiment further defines a heating component, which includes a heating power supply control unit, a kettle electric heater 4 and a liquid level gauge 43. The heating power supply control unit is arranged at the end of the kettle electric heater 4, and is used to control the on and off of the circuit of the kettle electric heater 4. When the incoming liquid is cut off, the kettle electric heater 4 is powered off to prevent the kettle electric heater 4 from being damaged by high temperature. The liquid level gauge 43 is arranged at the tail of the kettle electric heater 4. An electric heating tube 41 and a liquid baffle plate 42 are arranged in the kettle electric heater 4. The liquid baffle plate 42 is arranged behind the electric heating tube 41, and the top of the liquid baffle plate 42 is spaced from the inner wall of the top of the kettle electric heater 4. The liquid baffle plate 42 is used to control the height of the liquid level at the position of the electric heating tube 41, so that the electric heating tube 41 is always below the liquid level for heating; the rich liquid that is heated and boiled will splash over the liquid baffle plate 42 and enter the chamber at the tail of the kettle electric heater 4. The liquid level gauge 43 is arranged In the chamber at the tail of the kettle type electric heater 4 behind the baffle, the liquid level gauge 43 can judge the liquid level of the chamber at the tail of the liquid baffle 42 of the kettle type electric heater 4 according to the liquid level. If the page height exceeds the preset value, the rich liquid will flow into the reboiler 1 through the rich liquid reflux component for recirculation; a gas phase balance pipe 5 is arranged at the top of the kettle type electric heater 4, and the gas phase balance pipe 5 is connected to the gas inlet 34. The water vapor evaporated by heating by the kettle type point heater will enter the distillation tower 2 through the gas phase balance pipe 5 for separation; a rich liquid inlet pipe 6 is arranged below the electric heating pipe 41 on the kettle type electric heater 4, and the rich liquid inlet pipe 6 is connected to the rich liquid outlet 735, and the rich liquid outlet 735 is connected to the liquid accumulation tank 33. A shut-off valve 61 is arranged on the rich liquid outflow pipe 8. When there is more rich liquid in the electric heating pipe 41 in the kettle type electric heater 4, the shut-off valve 61 can be closed to prevent the rich liquid from continuing to flow in. When there is less rich liquid, the shut-off valve 61 is opened to continue to supply liquid. The other parts of this embodiment are the same as those of the above embodiment and will not be described again here.

[0026] Embodiment 3:

[0027] On the basis of the above embodiment, this embodiment further defines the rich liquid reflux component, a heating rich liquid inlet is provided on the barrel cover 31 below the liquid accumulating tank 33; the rich liquid reflux component includes a rich liquid outflow pipe 8 and a lifting pump 9, the lifting pump 9 is provided in the middle of the rich liquid outflow pipe 8, and the rich liquid outflow pipe 8 is respectively connected to the heating rich liquid inlet and the end of the kettle electric heater 4; one end of the lifting pump 9 is connected to a frequency conversion controller, and the lifting pump 9 is used to increase the speed of the rich liquid reflux. The other parts of this embodiment are the same as the above embodiment, and will not be repeated here.

[0028] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. used to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when used. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0029] In addition, if the terms "horizontal" or "vertical" appear in the description of the present invention, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. An oil, gas, natural gas glycol electric heating dehydration device, characterized in that: It includes a reboiling component, a distillation component, a heating component and a rich liquid reflux component; the distillation component is arranged above the reboiling component, the heating component is connected to the distillation component, and the rich liquid reflux component is respectively connected to the end of the heating component and the distillation component; the distillation component includes a distillation tower, and a rich liquid collection and ventilation component is arranged in the distillation tower at the lower end close to the reboiling component, and the rich liquid collection and ventilation component is used to collect the rich liquid triethylene glycol at the bottom of the distillation tower so that it enters the heating component through gravity for heating and dehydration.

2. The oil, gas and natural gas glycol electric heating dehydration device according to claim 1, characterized in that: A water vapor outlet is arranged at the top of the distillation tower, and a cold night outlet, a cold night inlet and a rich liquid distillation inlet are arranged in sequence below the water vapor outlet. The rich liquid collection and ventilation component is arranged between the rich liquid distillation inlet and the reboiler component.

3. The oil, gas and natural gas glycol electric heating dehydration device according to claim 2, characterized in that: The rich liquid collecting and ventilation component includes a barrel cover, a liquid collection tank, and a liquid collection and ventilation umbrella cap. The barrel cover is connected to the end of the distillation tower. A liquid collection and ventilation umbrella cap is arranged inside the barrel cover. The liquid collection and ventilation umbrella cap is an inverted conical structure. A liquid collection tank is arranged below the liquid collection and ventilation umbrella cap. The liquid collection tank is an annular groove structure, and its edge is connected to the barrel cover. A gas inlet and a rich liquid outlet are arranged on the side of the barrel cover. The gas inlet is arranged on the side wall of the barrel cover above the liquid collection and ventilation umbrella cap, and the rich liquid outlet is arranged on the side wall of the barrel cover on the side of the liquid collection tank.

4. The oil, gas and natural gas glycol electric heating dehydration device according to claim 3, characterized in that: The heating component includes a heating power control unit, a kettle electric heater and a liquid level meter, wherein the heating power control unit is arranged at the end of the kettle electric heater, the liquid level meter is arranged at the tail of the kettle electric heater, an electric heating tube and a liquid baffle plate are arranged in the kettle electric heater, the liquid baffle plate is arranged behind the electric heating tube, and the top of the liquid baffle plate is spaced apart from the top inner wall of the kettle electric heater.

5. The oil, gas and natural gas glycol electric heating dehydration device according to claim 4, characterized in that: A gas phase balance pipe is arranged at the top of the kettle type electric heater, and the gas phase balance pipe is connected to the gas inlet.

6. The oil, gas and natural gas glycol electric heating dehydration device according to claim 4, characterized in that: A rich liquid inflow pipe is arranged below the electric heating pipe on the kettle-type electric heater, the rich liquid inflow pipe is connected to the rich liquid outlet, and a cut-off valve is arranged on the rich liquid inflow pipe.

7. The oil, gas and natural gas glycol electric heating dehydration device according to claim 4, characterized in that: A heating rich liquid inlet is arranged on the cylinder cover below the liquid accumulation tank; the rich liquid reflux assembly comprises a rich liquid outflow pipe and a lifting pump, the lifting pump is arranged in the middle of the rich liquid outflow pipe, and the rich liquid outflow pipe is respectively connected to the heating rich liquid inlet and the end of the kettle electric heater.

8. The oil, gas and natural gas glycol electric heating dehydration device according to claim 7, characterized in that: One end of the lift pump is connected with a frequency conversion controller.

9. The oil, gas and natural gas glycol electric heating dehydration device according to claim 1, characterized in that: The reboiler assembly comprises a reboiler and a stripping column, wherein the stripping column is arranged at one end of the reboiler, a chimney is arranged at the other end of the reboiler, and a burner interface is arranged below the chimney.

Images