CN219099063U - Condensate-containing tail gas recovery system - Google Patents
Condensate-containing tail gas recovery system Download PDFInfo
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- CN219099063U CN219099063U CN202223538013.3U CN202223538013U CN219099063U CN 219099063 U CN219099063 U CN 219099063U CN 202223538013 U CN202223538013 U CN 202223538013U CN 219099063 U CN219099063 U CN 219099063U
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Abstract
The utility model relates to the technical field of condensate-containing tail gas recovery, and discloses a condensate-containing tail gas recovery system which comprises a gas buffer tank, a reactor, a heat exchanger, an oil-water separation tank and a fan, wherein the gas buffer tank is connected with the reactor; the gas buffer tank is provided with a first gas inlet and a first gas outlet; the lower end of the reactor is provided with a second air inlet, the upper end of the reactor is provided with a second air outlet, and a resin adsorbent is arranged in the reactor; the first air outlet is communicated with the second air inlet through a fan, and the second air outlet is communicated with an exhaust pipeline; the upper end of the reactor is also provided with a desorption gas inlet, and the lower end of the reactor is provided with a desorption gas outlet; the heat exchanger is provided with a third inlet and a third outlet; the desorption gas outlet is communicated with the third inlet; the oil-water separation tank is provided with a liquid inlet pipe, a liquid discharge pipe and an oil discharge pipe; the third outlet is communicated with the liquid inlet pipe. The utility model realizes the reutilization of the natural gas condensate, solves the pollution problem of the breathing tail gas of the natural gas condensate, and has simple recovery process and high recovery treatment efficiency.
Description
Technical Field
The utility model relates to the technical field of condensate oil-containing tail gas recovery, in particular to a condensate oil-containing tail gas recovery system.
Background
In the production of natural gas fields, because the oil remover, the storage tank and other equipment have the breathing function, the discharged tail gas contains condensate volatile organic compounds with higher concentration, and the direct discharge of the substances can cause environmental pollution and energy waste.
At present, the tail gas of oil removers, storage tanks and the like of natural gas fields is mostly treated by active carbon adsorbents or burnt. However, the activated carbon adsorbent has lower treatment efficiency on organic matters such as high-concentration organic waste gas of a gas field and condensate oil mainly containing C4 to C10 and above, and has the defects of unstable treatment efficiency and frequent maintenance and replacement of activated carbon; the burning treatment process is complex, the fire protection design specification requirement can not be met on the existing gas field, the burning device is difficult in process arrangement, and the burning causes the waste of condensate oil energy.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model aims to provide a condensate oil-containing tail gas recovery system which has high treatment efficiency and simple process, realizes the recovery of natural gas condensate oil and solves the pollution problem of the natural gas condensate oil-containing tail gas.
In order to achieve the above purpose, the present utility model is realized by the following technical scheme.
A condensate-containing tail gas recovery system comprises a gas buffer tank, a reactor, a heat exchanger, an oil-water separation tank and a fan;
the lower part of the side wall of the gas buffer tank is provided with a first gas inlet, and the middle part of the side wall is provided with a first gas outlet; the lower end of the reactor is provided with a second air inlet, the upper end of the reactor is provided with a second air outlet, and a resin adsorbent is arranged in the reactor; the first air outlet is communicated with an air inlet of the fan through a connecting pipeline, the air outlet of the fan is communicated with the second air inlet through a tail gas inlet pipeline, and an air inlet valve is arranged on the tail gas inlet pipeline; the second air outlet is communicated with an exhaust pipeline, and an exhaust valve is arranged on the exhaust pipeline;
the upper end of the reactor is also provided with a desorption gas inlet which is communicated with a desorption gas inlet pipeline, and the desorption gas inlet pipeline is provided with a valve; the lower end of the reactor is provided with a desorption gas outlet;
the upper part of the side wall of the heat exchanger is provided with a third inlet, and the lower part of the side wall is provided with a third outlet; the desorption gas outlet is communicated with the third inlet through a desorption gas outlet pipeline, and the desorption gas outlet pipeline is provided with a valve; the heat exchanger is used for condensing the mixture of the desorbed organic matters and the vapor;
the top of the oil-water separation tank is provided with a liquid inlet pipe, the bottom of the oil-water separation tank is provided with a liquid discharge pipe, and the side wall of the oil-water separation tank is provided with an oil discharge pipe; the third outlet is communicated with the liquid inlet pipe; the liquid discharge pipe is communicated with the water inlet of the outer discharge pump.
Preferably, a baffle is vertically arranged between the liquid inlet pipe and the liquid outlet pipe of the oil-water separation tank, the lower end of the baffle is fixedly connected with the upper surface of the bottom wall of the oil-water separation tank, and the upper end of the baffle is flush and is not contacted with the top wall of the oil-water separation tank; the baffle divides the oil-water separation tank into a liquid inlet area where the liquid inlet pipe is positioned and a separation area where the liquid discharge pipe is positioned; the upper part of the separation area is horizontally provided with an overflow groove which is communicated with the oil discharge pipe.
Further preferably, the upper surface of the bottom wall of the liquid inlet area is provided with a wash-out plate, and the wash-out plate is positioned right below the liquid inlet pipe.
Preferably, the resin adsorbent is a hydrophobic macroporous resin.
Preferably, the reactor is a fixed bed reactor.
Preferably, the heat exchanger is a gas-liquid heat exchanger, and the gas-liquid heat exchanger is of a fin tube type or plate type structure.
Preferably, the number of reactors is 2; the second air inlet of each reactor is communicated with a tail gas inlet pipeline; the second air outlet of each reactor is communicated with an exhaust pipeline; the desorption gas inlet of each reactor is communicated with a desorption gas inlet pipeline, and the desorption gas outlet of each reactor is communicated with a desorption gas outlet pipeline.
Preferably, the number of the oil-water separation tanks is 2, namely a first oil-water separation tank and a second oil-water separation tank; the first oil-water separation tank is arranged above the second oil-water separation tank, a liquid inlet pipe of the first oil-water separation tank is communicated with the third outlet, a liquid discharge pipe of the first oil-water separation tank is communicated with a liquid inlet pipe of the second oil-water separation tank, and a liquid discharge pipe of the second oil-water separation tank is communicated with a water inlet of the outer discharge pump.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the natural gas condensate tail gas is recovered through the adsorption-desorption process, so that the reutilization of the natural gas condensate is realized, and the pollution problem of the natural gas condensate tail gas is solved.
The utility model has simple recovery process and high recovery treatment efficiency.
Drawings
The utility model will now be described in further detail with reference to the drawings and to specific examples.
FIG. 1 is a schematic diagram of a condensate containing tail gas recovery system;
FIG. 2 is a schematic structural view of a reactor;
FIG. 3 is a schematic cross-sectional view of an oil-water separator tank;
the reference numerals are:
1. a gas buffer tank; 2. a reactor; 3. a heat exchanger; 4. an oil-water separation tank; 5. a blower; 6. an external pump;
22. a tail gas inlet pipe; 23. an exhaust duct; 24. a desorption gas inlet pipeline; 25. a desorption gas outlet pipeline; 41. a liquid inlet pipe; 42. a liquid discharge pipe; 43. an oil drain pipe; 44. a baffle; 45. a liquid inlet area; 46. a separation zone; 47. an overflow trough; 48. and a wash-out plate.
Detailed Description
Embodiments of the present utility model will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only for illustrating the present utility model and should not be construed as limiting the scope of the present utility model.
Referring to fig. 1, a schematic structure of a condensate tail gas recovery system according to the present utility model is shown. The condensate-containing tail gas recovery system comprises a gas buffer tank 1, a reactor 2, a heat exchanger 3, an oil-water separation tank 4 and a fan 5;
the lower part of the side wall of the gas buffer tank 1 is provided with a first gas inlet, and the middle part of the side wall is provided with a first gas outlet;
the gas buffer tank is used for carrying out homogenization average adjustment on the condensate-containing tail gas, so that the concentration and flow of volatile organic compounds are kept relatively balanced, the reliable operation of subsequent equipment is facilitated, and the volume is adjusted to be 3-30 min for discharging the tail gas flow.
The lower end of the reactor 2 is provided with a second air inlet, the upper end of the reactor is provided with a second air outlet, and a resin adsorbent is arranged in the reactor 2; the first air outlet is communicated with the air inlet of the fan 5 through a connecting pipeline, the air outlet of the fan is communicated with the second air inlet through a tail gas inlet pipeline 22, and an air inlet valve is arranged on the tail gas inlet pipeline 22; the second air outlet is communicated with an exhaust pipeline 23, and an exhaust valve is arranged on the exhaust pipeline 23. The reactor is used for adsorbing condensate oil in tail gas and desorbing the adsorbed condensate oil, in the embodiment, the reactor 2 is a fixed bed reactor, and the resin adsorbent forms a stacked bed layer with a certain height in the reactor, so that the condensate oil can be efficiently adsorbed.
The upper end of the reactor 2 is also provided with a desorption gas inlet which is communicated with a desorption gas inlet pipeline 24, and the desorption gas inlet pipeline 24 is provided with a valve; the lower end of the reactor 2 is provided with a desorption gas outlet;
the upper part of the side wall of the heat exchanger 3 is provided with a third inlet, and the lower part of the side wall is provided with a third outlet; the desorption gas outlet is communicated with the third inlet through a desorption gas outlet pipeline 25, and the desorption gas outlet pipeline 25 is provided with a valve; the heat exchanger is used for condensing the mixture of the desorbed organic matters and the vapor;
the top of the oil-water separation tank 4 is provided with a liquid inlet pipe 41, the bottom is provided with a liquid discharge pipe 42, and the side wall is provided with an oil discharge pipe 43; the third outlet is communicated with a liquid inlet pipe 41; the drain pipe 42 communicates with the water inlet of the discharge pump 6. The oil-water separation tank is used for separating oil from water of the oil-water mixture.
In the above embodiment, the tail gas containing condensate oil enters the gas buffer tank, passes through the fan, enters the reactor from the gas buffer tank, the condensate oil is adsorbed by the adsorbent layer in the reactor, and the adsorbed tail gas is discharged from the exhaust pipeline at the upper end of the reactor. And after the adsorption is carried out for a period of time, a valve of a desorption gas inlet pipeline is opened, low-pressure steam is introduced into the reactor to desorb the adsorbent, condensate oil adsorbed by the adsorbent is flushed and desorbed by the low-pressure steam, and the condensate oil is discharged from the desorption gas outlet pipeline along with the low-pressure steam from the reactor and enters the heat exchanger. The heat exchanger condenses the low-pressure steam and condensate oil to form an oil-water mixture, the oil-water mixture is separated by the oil-water separator, the condensate oil is recovered, and the wastewater is discharged.
Further, a baffle plate 44 is vertically arranged between the liquid inlet pipe 41 and the liquid outlet pipe 42 of the oil-water separation tank 4, the lower end of the baffle plate 44 is fixedly connected with the upper surface of the bottom wall of the oil-water separation tank, and the upper end of the baffle plate 44 is flush and is not contacted with the top wall of the oil-water separation tank; the baffle divides the oil-water separation tank into a liquid inlet area 45 where the liquid inlet pipe 41 is positioned and a separation area 46 where the liquid discharge pipe 42 is positioned; the upper part of the separation area is horizontally provided with an overflow groove 47, the installation height of the overflow groove is 50-150 mm lower than the elevation of the baffle 44, and the overflow groove 47 is communicated with the oil discharge pipe 43. The liquid inlet pipe stretches into the lower part in the oil-water separation tank, in order to prevent the oil-water mixture from impacting the tank bottom, the upper surface of the bottom wall of the liquid inlet area 43 is provided with an anti-flushing plate 48, and the anti-flushing plate 48 is positioned right below the liquid inlet pipe 41.
In the above embodiment, the oil-water mixture enters the oil-water separation tank from the liquid inlet pipe, first, preliminary separation is performed in the liquid inlet area, the condensate floats on the surface of the wastewater, the liquid level in the liquid inlet area gradually rises along with the continuous entry of the oil-water mixture, the condensate and part of the wastewater pass through the baffle plate to enter the separation area, secondary separation is performed in the separation area, and the condensate floats on the surface of the wastewater. Along with the rise of the liquid level in the separation area, condensate enters the overflow groove and then enters the oil discharge pipe to be discharged, so that the recovery of the condensate is realized. The waste water is discharged from the drain pipe through the discharge pump.
Furthermore, the resin adsorbent is hydrophobic macroporous resin, is spherical in shape and has a particle size of about 1mm, and the resin has a better condensate oil adsorption effect.
Furthermore, the heat exchanger 3 is a gas-liquid heat exchanger, the gas-liquid heat exchanger is of a fin tube type or plate type structure, the heat exchange efficiency is high, the condensation effect is good, and the condensation efficiency is improved.
Further, the number of the reactors 2 is 2; the second inlet of each of the reactors is in communication with an exhaust gas inlet conduit 22; the second air outlet of each reactor is communicated with an exhaust pipeline; the desorption gas inlet of each reactor is communicated with a desorption gas inlet pipeline 24, and the desorption gas outlet of each reactor is communicated with a desorption gas outlet pipeline 25. When one reactor needs to carry out a desorption process, an air inlet valve and an air outlet valve of the reactor are closed, a valve of a desorption air inlet pipeline and a valve of a desorption air outlet pipeline of the reactor are opened, an air inlet valve and an air outlet valve of the other reactor are opened, a valve of a desorption air inlet pipeline and a valve of a desorption air outlet pipeline of the other reactor are closed, and the two reaction tanks respectively carry out adsorption and desorption, so that continuous treatment of tail gas is realized.
Further, the number of the oil-water separation tanks 4 is 2, namely a first oil-water separation tank and a second oil-water separation tank; the first oil-water separation tank is arranged above the second oil-water separation tank, the liquid inlet pipe of the first oil-water separation tank is communicated with the third outlet, the liquid outlet pipe of the first oil-water separation tank is communicated with the liquid inlet pipe of the second oil-water separation tank, and the liquid outlet pipe of the second oil-water separation tank is communicated with the water inlet of the discharge pump 6. And the second oil-water separation tank carries out oil-water separation on the wastewater of the first oil-water separation tank again, so that the recovery efficiency of condensate oil is further improved.
According to the utility model, the natural gas condensate tail gas is recovered through the adsorption-desorption process, so that the reutilization of the natural gas condensate is realized, and the pollution problem of the natural gas condensate tail gas is solved. The utility model has simple recovery process and high recovery treatment efficiency.
While the utility model has been described in detail in this specification with reference to the general description and the specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the utility model and are intended to be within the scope of the utility model as claimed.
Claims (8)
1. The condensate oil-containing tail gas recovery system is characterized by comprising a gas buffer tank (1), a reactor (2), a heat exchanger (3), an oil-water separation tank (4) and a fan (5);
the lower part of the side wall of the gas buffer tank (1) is provided with a first gas inlet, and the middle part of the side wall is provided with a first gas outlet; the lower end of the reactor (2) is provided with a second air inlet, the upper end of the reactor is provided with a second air outlet, and a resin adsorbent is arranged in the reactor (2); the first air outlet is communicated with the air inlet of the fan (5) through a connecting pipeline, the air outlet of the fan is communicated with the second air inlet through a tail gas inlet pipeline (22), and an air inlet valve is arranged on the tail gas inlet pipeline (22); the second air outlet is communicated with an exhaust pipeline (23), and an exhaust valve is arranged on the exhaust pipeline (23);
the upper end of the reactor (2) is also provided with a desorption gas inlet which is communicated with a desorption gas inlet pipeline (24), and the desorption gas inlet pipeline (24) is provided with a valve; the lower end of the reactor (2) is provided with a desorption gas outlet;
the upper part of the side wall of the heat exchanger (3) is provided with a third inlet, and the lower part of the side wall is provided with a third outlet; the desorption gas outlet is communicated with the third inlet through a desorption gas outlet pipeline (25), and the desorption gas outlet pipeline (25) is provided with a valve;
the top of the oil-water separation tank (4) is provided with a liquid inlet pipe (41), the bottom of the oil-water separation tank is provided with a liquid discharge pipe (42), and the side wall of the oil-water separation tank is provided with an oil discharge pipe (43); the third outlet is communicated with the liquid inlet pipe (41); the liquid discharge pipe (42) is communicated with a water inlet of the outer discharge pump (6).
2. The condensate tail gas recovery system according to claim 1, wherein a baffle plate (44) is vertically arranged between a liquid inlet pipe (41) and a liquid outlet pipe (42) of the oil-water separation tank (4), the lower end of the baffle plate (44) is fixedly connected with the upper surface of the bottom wall of the oil-water separation tank, and the upper end of the baffle plate (44) is flush and is not contacted with the top wall of the oil-water separation tank; the baffle separates the oil-water separation tank into a liquid inlet region (45) where the liquid inlet pipe (41) is positioned and a separation region (46) where the liquid outlet pipe (42) is positioned; an overflow groove (47) is horizontally arranged at the upper part of the separation zone, and the overflow groove (47) is communicated with the oil discharge pipe (43).
3. The condensate tail gas recovery system according to claim 2, wherein the upper surface of the bottom wall of the liquid inlet zone (45) is provided with an anti-flushing plate (48), said anti-flushing plate (48) being located directly below the liquid inlet tube (41).
4. The condensate containing tail gas recovery system of claim 1 wherein the resin adsorbent is a hydrophobic macroporous resin.
5. The condensate containing tail gas recovery system of claim 1, wherein the reactor (2) is a fixed bed reactor.
6. The condensate-containing tail gas recovery system according to claim 1, wherein the heat exchanger (3) is a gas-liquid type heat exchanger, and the gas-liquid type heat exchanger is a fin tube type or plate type structure.
7. The condensate containing tail gas recovery system of claim 1, wherein the number of reactors (2) is 2; the second air inlet of each reactor is communicated with a tail gas inlet pipeline (22); the second air outlet of each reactor is communicated with an exhaust pipeline (23); the desorption gas inlet of each reactor is communicated with a desorption gas inlet pipeline (24), and the desorption gas outlet of each reactor is communicated with a desorption gas outlet pipeline (25).
8. The condensate tail gas recovery system according to claim 1, wherein the number of oil-water separation tanks (4) is 2, namely a first oil-water separation tank and a second oil-water separation tank; the first oil-water separation tank is arranged above the second oil-water separation tank, the liquid inlet pipe of the first oil-water separation tank is communicated with the third outlet, the liquid outlet pipe of the first oil-water separation tank is communicated with the liquid inlet pipe of the second oil-water separation tank, and the liquid outlet pipe of the second oil-water separation tank is communicated with the water inlet of the outer discharge pump (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223538013.3U CN219099063U (en) | 2022-12-29 | 2022-12-29 | Condensate-containing tail gas recovery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223538013.3U CN219099063U (en) | 2022-12-29 | 2022-12-29 | Condensate-containing tail gas recovery system |
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| Publication Number | Publication Date |
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| CN219099063U true CN219099063U (en) | 2023-05-30 |
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| CN202223538013.3U Active CN219099063U (en) | 2022-12-29 | 2022-12-29 | Condensate-containing tail gas recovery system |
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- 2022-12-29 CN CN202223538013.3U patent/CN219099063U/en active Active
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