CN113893653A - Flue gas component adjusting equipment and working method thereof - Google Patents
Flue gas component adjusting equipment and working method thereof Download PDFInfo
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- CN113893653A CN113893653A CN202111494593.8A CN202111494593A CN113893653A CN 113893653 A CN113893653 A CN 113893653A CN 202111494593 A CN202111494593 A CN 202111494593A CN 113893653 A CN113893653 A CN 113893653A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
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Abstract
The invention discloses a flue gas component adjusting device and a working method thereof, belonging to the technical field of mechanical equipment, wherein the flue gas component adjusting device comprises a flue gas injection device, wherein one end of the flue gas injection device is provided with a flue gas inlet, the other end of the flue gas injection device is provided with a flue gas outlet and a flue gas adjusting port, and flue gas enters a supercharger through the flue gas outlet and is injected into an oil reservoir in a pressurizing manner; the gas inlet of the flue gas separation membrane component is communicated with the flue gas adjusting port; the gas inlet of the first pressure regulating valve is communicated with the gas outlet of the flue gas separation membrane component; the back mixing discharge regulating valve has a gas inlet connected to the first pressure regulating valve and a gas outlet communicated to the fume inlet and the outside environment; and the monitoring controller is electrically connected with the first pressure regulating valve and the back mixing discharge regulating valve and is used for monitoring and regulating and controlling the flue gas parameters. The technical problem that the proportion of carbon dioxide in flue gas can not be adjusted and then injected into different oil reservoirs in the prior art is solved.
Description
Technical Field
The invention belongs to the technical field of mechanical equipment, and particularly relates to smoke component adjusting equipment and a working method thereof.
Background
At present, a steam injection boiler for heavy oil thermal recovery development takes natural gas as fuel, and the main components of flue gas generated by combustion are nitrogen, carbon dioxide, water vapor, and a small amount of oxygen, nitrogen oxide and inert gas. Wherein the content of N2 is about 70% -75%, and the content of CO2 is about 10% -20%.
Since carbon dioxide and nitrogen oxide are pollutants controlled by national environmental standards, if the flue gas is discharged into the atmosphere, the environment can be seriously damaged. However, the ratio of carbon dioxide and nitrogen in the flue gas is adjusted after the flue gas is collected and injected into different oil reservoirs, so that the swept volume can be enlarged, the pressure of the oil reservoir can be increased, the viscosity of thick oil can be reduced, and the steam channeling can be inhibited, thereby improving the thermal recovery effect.
The invention is provided in view of the above.
Disclosure of Invention
The invention aims to provide flue gas component adjusting equipment to solve the technical problem that the proportion of carbon dioxide in flue gas cannot be adjusted and then the flue gas is injected into different oil reservoirs in the prior art.
In order to realize the purpose, the invention adopts the following technical scheme:
a flue gas component adjusting device comprises a flue gas component adjusting device,
the device comprises a smoke injection device, a smoke inlet, a smoke outlet and a smoke adjusting port, wherein one end of the smoke injection device is provided with the smoke inlet, the other end of the smoke injection device is provided with the smoke outlet and the smoke adjusting port, and smoke is injected into an oil reservoir through the smoke outlet;
the gas inlet of the flue gas separation membrane component is communicated with the flue gas adjusting port;
the gas inlet of the first pressure regulating valve is communicated with the gas outlet of the flue gas separation membrane component;
the back mixing discharge regulating valve has a gas inlet connected to the first pressure regulating valve and a gas outlet communicated to the fume inlet and the outside environment;
and the monitoring controller is electrically connected with the first pressure regulating valve and the back mixing discharge regulating valve and is used for monitoring and regulating and controlling the flue gas parameters.
In some of these embodiments, the flue gas separation membrane module comprises,
an air inlet of the separation membrane group is communicated with the smoke regulating port,
the first separation membrane group gas outlet is communicated with the first pressure regulating valve, and the separated first flue gas component sequentially passes through the first separation membrane group gas outlet, the first pressure regulating valve and the back-mixing discharge regulating valve and flows into a flue gas inlet;
and the second gas component flows to the external environment sequentially through the second separation membrane group gas outlet, the first pressure regulating valve and the back-mixing discharge regulating valve.
In some embodiments, the flue gas separation membrane module further comprises a second pressure regulating valve, wherein the gas inlet of the second pressure regulating valve is communicated with the flue gas regulating port, and the gas outlet of the second pressure regulating valve is communicated with the gas inlet of the flue gas separation membrane module.
In some of the embodiments, a flue gas flow regulating valve is arranged between the flue gas separation membrane module and the second pressure regulating valve.
In some of these embodiments, the flue gas injection means comprises,
the air inlet end of the supercharging device is communicated with the flue gas inlet;
the air inlet end of the buffer device is communicated with the air outlet end of the supercharging device;
the air inlet end of the temperature adjusting device is connected with the air outlet end of the buffer device, and the air outlet end of the temperature adjusting device is communicated with the flue gas adjusting port;
wherein, the flue gas passes through buffer divides into two the tunnel, and wherein flue gas of the same way injects into the oil reservoir through the exhanst gas outlet, and another way flue gas flow direction temperature regulation apparatus just passes through the flue gas is adjusted the mouth and is flowed to flue gas separation membrane subassembly department.
In some of these embodiments, the temperature regulating device comprises a freeze dryer, a gas heat exchanger in series with the freeze dryer.
In some embodiments, the temperature adjusting device further comprises a temperature compensation electric heater connected with the gas heat exchanger, and an air outlet of the temperature compensation electric heater is communicated with the second pressure adjusting valve.
In some of these embodiments, the monitoring controller includes,
a control unit;
the component monitoring unit is electrically connected with the control unit and is used for collecting the component proportion of the flue gas of the gas outlet of the back-mixing emission regulating valve communicated with the flue gas inlet and the gas outlet of the first separation membrane group;
and the pressure monitoring unit is electrically connected with the control unit and is used for acquiring pressure data of the gas inlet of the flue gas separation membrane group, the gas outlet of the first separation membrane group and the gas outlet of the second separation membrane group.
A method of operating a flue gas composition conditioning apparatus as claimed in any preceding claim, comprising,
flue gas injection: the flue gas enters the flue gas injection device and then is divided into two paths of flue gas, wherein one path of flue gas flows into the oil reservoir through the flue gas outlet, and the other part of flue gas flows to the flue gas adjusting port;
flue gas separation: the flue gas flowing to the flue gas adjusting opening flows into a flue gas separation membrane component, the flue gas is divided into a first path of flue gas component and a second path of flue gas component after passing through the flue gas separation membrane component, the first path of flue gas component flows into the flue gas inlet through a back-mixing discharge adjusting valve for back mixing, and the second path of flue gas component flows into the external environment through the back-mixing discharge adjusting valve;
adjusting and back-doping smoke components: respectively collecting the flue gas component proportions of a gas outlet and a flue gas outlet which are communicated with a flue gas inlet by a back-mixing discharge regulating valve, and comparing the collected flue gas component proportions with preset flue gas component proportions:
when the component proportion of the carbon dioxide in the collected flue gas is smaller than a preset value, adjusting a first pressure regulating valve to increase the concentration of the carbon dioxide in the first flue gas component, and/or adjusting a back-mixing discharge regulating valve to increase the back-mixing amount of the first flue gas component;
and when the component proportion of the carbon dioxide in the collected flue gas is larger than a preset value, adjusting the first pressure regulating valve to reduce the concentration of the carbon dioxide in the first flue gas component, and/or adjusting the back-mixing discharge regulating valve to reduce the back-mixing amount of the first flue gas component.
In some embodiments, the method further comprises a flue gas separation membrane module regeneration step, which specifically comprises,
collecting pressure P1 at the air inlet of the separation membrane group, pressure P2 at the air outlet of the first separation membrane group and pressure P3 at the air outlet of the second separation membrane group, and the difference between the pressure P1 and the pressure P2 is recorded as Δ P1, the difference between the pressure P1 and the pressure P3 is recorded as Δ P2, and the size of the Δ P1, the Δ P2 and a preset value P0 is judged;
when the Δ P1 is P0 and/or the Δ P2 is P0, the first pressure adjusting valve, the second pressure adjusting valve and the back-mixing discharge adjusting valve are adjusted to enable the flue gas to reversely flow, and the reverse flushing of the flue gas separation membrane component is realized.
Compared with the prior art, the invention has the advantages and positive effects that:
the application designs a flue gas component adjusting equipment, make the flue gas can flow into the oil reservoir through this device through setting up flue gas injection device, set up the flue gas separation membrane subassembly simultaneously, first pressure regulating valve, back-mixing discharge control valve and monitor controller, gather the flue gas parameter of relevant position through monitor controller, and contrast with preset flue gas parameter, when the flue gas component proportion that flows to flue gas import department by back-mixing discharge control valve is greater than or is less than when presetting flue gas component proportion promptly, monitor controller is through adjusting first pressure regulating valve and back-mixing discharge control valve, make flue gas component proportion can reach the default, thereby realize adjusting the carbon dioxide proportion in the flue gas, and then can adjust the component proportion of oil reservoir flue gas according to the difference, make the flue gas can pour into to different oil reservoirs from this. The technical problem that the proportion of carbon dioxide in flue gas can not be adjusted and then injected into different oil reservoirs in the prior art is solved.
Drawings
Fig. 1 is a schematic structural diagram of a flue gas component adjusting apparatus provided in this embodiment;
fig. 2 is a diagram illustrating a normal flow state of flue gas when the flue gas separation membrane module provided in this embodiment separates flue gas;
FIG. 3 is a state 1 of the membrane module for flue gas separation provided in this embodiment under a backwashing condition;
FIG. 4 is a state 2 of the membrane module for flue gas separation provided in this embodiment under a backwashing condition;
in the above figures: 1. a pressure boosting device; 2. a buffer device; 3. a freeze dryer; 4. a gas heat exchanger; 5. a temperature compensated electric heater; 6. a flue gas separation membrane module; 7. a first pressure regulating valve; 8. a second pressure regulating valve; 9. back mixing discharge regulating valve; 10. a flow regulating valve.
Detailed Description
The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", "first", "second", etc. indicate orientations or positional relationships based on the positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present application, the terms "mounted," "connected," "fixed," "connected," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; either directly or through an intermediary profile. "joined" may refer to two separate elements being joined together, joined, or the like. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Technical scheme in the embodiment of this application for can't realize among the above-mentioned prior art adjusting the back and injecting into the technical problem of different oil reservoirs the carbon dioxide proportion in the flue gas, the general thinking is as follows:
the invention provides a flue gas component adjusting device, which is characterized in that a flue gas injection device is arranged to enable flue gas to flow into an oil reservoir through the device, a flue gas separation membrane component, a first pressure adjusting valve, a back-mixing discharge adjusting valve and a monitoring controller are arranged, flue gas parameters of corresponding positions are collected through the monitoring controller and are compared with preset flue gas parameters, namely when the ratio of the flue gas components flowing to a flue gas inlet from the back-mixing discharge adjusting valve is larger than or smaller than the preset flue gas component ratio, the monitoring controller enables the flue gas component ratio to reach the preset value by adjusting the first pressure adjusting valve and the back-mixing discharge adjusting valve, so that the ratio of carbon dioxide in the flue gas is adjusted, the component ratio of the flue gas can be adjusted according to different oil reservoirs, and the flue gas can be injected into different oil reservoirs.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
A flue gas component adjusting device comprises a flue gas component adjusting device,
the device comprises a flue gas injection device, a flue gas inlet, a flue gas outlet and a flue gas adjusting port, wherein one end of the flue gas injection device is provided with the flue gas inlet, the other end of the flue gas injection device is provided with the flue gas outlet and the flue gas adjusting port, and flue gas flows into an oil reservoir through the flue gas outlet;
the gas inlet of the flue gas separation membrane component 6 is communicated with the flue gas adjusting port;
a first pressure regulating valve 7, the air inlet of which is communicated with the air outlet of the flue gas separation membrane component 6;
the back mixing discharge regulating valve, its air inlet connects with said first pressure regulating valve 7, its air outlet communicates with air inlet of the flue gas and external environment separately;
and the monitoring controller is electrically connected with the first pressure regulating valve 7 and the back mixing discharge regulating valve and is used for monitoring and regulating and controlling the smoke parameters.
As shown in fig. 1 to 4, the flue gas component adjusting device comprises a flue gas injection device and a flue gas separation device.
The smoke injection device is used for injecting smoke into a corresponding oil reservoir, so that swept volume is enlarged, oil reservoir pressure is improved, thick oil viscosity is reduced, steam channeling is inhibited, and thermal recovery effect is improved.
Specifically, the flue gas injection device comprises a pressurizing device 1, a buffering device 2 and a temperature adjusting device.
Supercharging device 1 is used for providing the power of flue gas separation, its one end is connected with the flue gas import, its other end is connected with buffer 2, this buffer 2 is used for stabilizing the air current, make the flue gas after the pressure boost can cushion in this buffer 2, thereby can more stable outflow, buffer 2's one end is provided with temperature regulation apparatus simultaneously, this temperature regulation apparatus is used for adjusting the temperature of flue gas, thereby make the temperature of flue gas can satisfy the requirement all the time, and then make flue gas separation membrane module 6 can be in best operating temperature.
In this embodiment, the temperature adjusting device includes a freeze dryer 3, a gas heat exchanger 4, and a temperature compensation electric heater 5. Wherein, the gas heat exchanger 4 is connected with the freeze dryer 3 in series; the temperature compensation electric heater 5 is connected with the gas heat exchanger 4, and the gas outlet of the temperature compensation electric heater 5 is communicated with the flue gas separation membrane component 6. Therefore, after the flue gas flows out of the buffer device 2, the flue gas flows to the gas heat exchanger 4 and the freeze dryer 3, and the temperature of the flue gas is adjusted through the gas heat exchanger 4 and the freeze dryer 3, so that the temperature of the flue gas reaches the preset temperature requirement. More specifically, when the flue gas passes through the gas heat exchanger 4 and the freeze dryer 3, the flue gas is divided into two paths of gas, one path of gas flows into an oil reservoir through a flue gas outlet, the other path of gas flows to the flue gas separation membrane assembly 6 through a flue gas adjusting port, the one path of gas can flow through the temperature compensation electric heater 5 in the process of flowing to the flue gas separation membrane assembly 6, and when the temperature of the flue gas cannot meet the requirement after being adjusted by the gas heat exchanger 4 and the freeze dryer 3, the flue gas temperature is adjusted by starting the temperature compensation electric heater 5 intermittently, so that the optimum working temperature of the flue gas separation membrane assembly 6 is ensured.
The flue gas separation device comprises a flue gas separation membrane assembly 6, a first pressure regulating valve 7, a back-mixing discharge regulating valve 9 and a monitoring controller.
The flue gas separation membrane module 6 is used for separating components in flue gas, and the flue gas separation membrane module 6 in the embodiment is mainly used for separating carbon dioxide with higher concentration and mixing flue gas components containing carbon dioxide with higher concentration back, namely mixing the flue gas components with unseparated flue gas and then enabling the mixture to flow into the flue gas injection device through the flue gas inlet. The gas inlet of the flue gas separation membrane component 6 is communicated with the flue gas adjusting port, and the gas outlet thereof is communicated with the gas inlet of the first pressure adjusting valve 7. In this embodiment, the temperature compensation electric heater 5 is arranged between the flue gas separation membrane assembly 6 and the flue gas adjusting port, so that the gas inlet of the flue gas separation membrane assembly 6 is communicated with the gas outlet of the temperature compensation electric heater 5, the temperature of the flue gas is always at the preset temperature, and the flue gas separation membrane assembly 6 is further ensured to be at the optimal working temperature.
Specifically, the flue gas separation membrane module 6 comprises a separation membrane module air inlet, a first separation membrane module air outlet, and a second separation membrane module air outlet, and the flue gas separation membrane module 6 further comprises a plurality of membrane tubes through which flue gas is separated. In the embodiment, the gas inlet of the separation membrane group is communicated with the flue gas regulating port, the gas outlet of the first separation membrane group is communicated with the first pressure regulating valve 7, the separated first flue gas component sequentially passes through the gas outlet of the first separation membrane group and the back-mixing discharge regulating valve 9 to flow into the flue gas inlet, and the main component of the first flue gas component is carbon dioxide; the gas outlet of the second separation membrane group is communicated with the first pressure regulating valve 7, the separated second flue gas component sequentially flows to and back to the mixing discharge regulating valve 9 through the gas outlet of the second separation membrane group and is discharged to the external environment, and the second flue gas component is mainly nitrogen. The component proportion of the carbon dioxide delivered to the flue gas inlet is thereby adjusted by adjusting the back-mixed emission control valve 9 and/or the first pressure control valve 7. In other words, the flue gas enters the membrane tube through the gas inlet of the separation membrane group, and the flue gas is separated through the membrane tube, namely, carbon dioxide, nitrogen and other gas components are separated.
Further, a membrane group flow regulating valve 10 is arranged on one side of the flue gas separation membrane module 6, namely, the membrane group flow regulating valve 10 is connected with an air inlet of the separation membrane group, and the flow of flue gas flowing into the flue gas separation membrane module 6 can be controlled by arranging the membrane group flow regulating valve 10.
And the first pressure regulating valve 7 is used for regulating the pressure to realize the regulation of the component proportion after the flue gas is separated. Specifically, the first pressure regulating valve 7 is disposed between the flue gas separation membrane module 6 and the back-mixing discharge regulating valve 9, that is, the air inlet of the back-mixing discharge regulating valve 9 is respectively communicated with the air outlet of the first separation membrane module and the air outlet of the second separation membrane module, and the air outlet thereof is communicated with the back-mixing discharge regulating valve 9. The concentration of the carbon dioxide in the first flue gas component can be adjusted by adjusting the first pressure adjusting valve 7, so that when the component proportion of the carbon dioxide in the collected flue gas is smaller than a preset value, the first pressure adjusting valve 7 is adjusted to increase the concentration of the carbon dioxide in the first flue gas component for back mixing; when the component proportion of the carbon dioxide in the collected flue gas is larger than a preset value, adjusting a first pressure adjusting valve 7 to reduce the concentration of the carbon dioxide in the first flue gas component for back mixing; thereby realize adjusting the carbon dioxide proportion in the flue gas, and then can adjust the component proportion of flue gas according to the oil deposit of difference, make the flue gas can pour into different oil deposits from this. The technical problem that the proportion of carbon dioxide in flue gas can not be adjusted and then injected into different oil reservoirs in the prior art is solved.
And the back mixing discharge regulating valve 9 is used for regulating the proportion of the carbon dioxide in the back mixing smoke. Specifically, the back-mixing discharge regulating valve 9 is arranged between the first pressure regulating valve 7 and the flue gas inlet, namely, the gas inlet of the back-mixing discharge regulating valve 9 is connected with the gas outlet of the first pressure regulating valve 7, and the gas outlets of the back-mixing discharge regulating valve 9 are respectively communicated with the flue gas inlet and the outside, namely, the back-mixing discharge regulating valve 9 comprises two gas outlets, wherein one gas outlet is communicated with the flue gas inlet, so that the separated first flue gas component can be mixed into the flue gas which is not processed, the proportion of each component in the flue gas is changed, and the back-mixing discharge regulating valve 9 can be suitable for different oil reservoirs; and the other gas outlet is communicated with the outside and used for discharging the separated second flue gas component. And when the component proportion of the carbon dioxide in the collected flue gas is smaller than a preset value, adjusting the back-mixing discharge adjusting valve 9 to increase the back-mixing amount of the first flue gas component. Therefore, when the component proportion of the carbon dioxide in the collected flue gas is smaller than the preset value, the back-mixing discharge regulating valve 9 is regulated to increase the back-mixing amount of the first flue gas component; when the component proportion of carbon dioxide is greater than the default in the flue gas of collection, adjust back and mix and discharge governing valve 9 and reduce the back mixing volume of first flue gas component to the realization is adjusted the carbon dioxide proportion in the flue gas, and then can adjust the component proportion of flue gas according to the oil deposit of difference, makes the flue gas can pour into different oil deposits from this into. The technical problem that the proportion of carbon dioxide in flue gas can not be adjusted and then injected into different oil reservoirs in the prior art is solved.
The monitoring controller comprises a control unit, a component monitoring unit and a pressure monitoring unit, wherein the component monitoring unit is electrically connected with the control unit and is used for acquiring the component proportion of the flue gas at the gas outlet of the back-mixing discharge regulating valve 9 communicated with the flue gas inlet and the gas outlet of the first separation membrane group and sending flue gas parameters to the control unit, wherein the flue gas parameters comprise the proportion, the temperature and the like of the components in the flue gas; the pressure monitoring unit is electrically connected with the control unit and used for collecting pressure data of the air inlet of the separation membrane group, the air outlet of the first separation membrane group and the air outlet of the second separation membrane group and sending the pressure data to the control unit.
Further, a second pressure regulating valve 8 is also arranged, the air inlet of the second pressure regulating valve is communicated with the flue gas regulating port, and the air outlet of the second pressure regulating valve is communicated with the air inlet of the flue gas separation membrane component 6. The second pressure regulating valve 8 is mainly used for realizing the backwashing function of the flue gas separation membrane assembly 6, and because the flue gas separation membrane assembly 6 can generate the phenomena of pressure difference rising and obvious reduction of gas separation flux after long-term operation, the internal and external pressure switching mode and the flow reverse flushing mode are combined at the moment, so that the flue gas separation membrane assembly 6 is automatically cleaned and regenerated by utilizing gas, and the efficient operation working condition of a membrane tube is further ensured.
As shown in fig. 2 to 4, by adjusting the first pressure regulating valve 7 and the second pressure regulating valve 8, the following operation conditions can be achieved:
the first working condition is as follows: adjust first pressure regulating valve 7 and second pressure regulating valve 8 and make the pressure of separation membrane group air inlet be less than the pressure of first separation membrane group gas outlet, and the pressure of second separation membrane group gas outlet is less than the pressure of first separation membrane group gas outlet to make the flue gas flow to separation membrane group air inlet and second separation membrane group gas outlet respectively by first separation membrane group gas outlet, thereby the flue gas reverse flow realizes the reverse washing to the membrane pipe promptly.
The second working condition is as follows: by adjusting the first pressure regulating valve 7 and the second pressure regulating valve 8, the pressure of the air inlet of the separation membrane group can be smaller than the pressure of the air outlet of the second separation membrane group, and the pressure of the air outlet of the first separation membrane group is smaller than the pressure of the air outlet of the second separation membrane group, so that the flue gas flows from the air outlet of the second separation membrane group to the air inlet of the separation membrane group and the air outlet of the first separation membrane group, the flow path of the flue gas moves in the reverse direction, namely the flue gas flows in the reverse direction, and the reverse cleaning of the membrane tube is realized;
the third working condition is as follows: through adjusting first pressure regulating valve 7 and second pressure regulating valve 8, can be so that the pressure of separation membrane group air inlet is less than the pressure of second separation membrane group gas outlet and the pressure of first separation membrane group gas outlet simultaneously to make the flue gas flow to separation membrane group air inlet by first separation membrane group gas outlet and second separation membrane group gas outlet, make the flow reverse motion of flue gas, thereby the flue gas reverse flow realizes the reverse washing to the membrane pipe promptly.
Therefore, by the arrangement of the structure, the flue gas separation membrane assembly 6 can be automatically cleaned and regenerated by utilizing gas, and the efficient operation working condition of the membrane tube is further ensured.
Further, the flue gas separation membrane module 6 is also provided with a protection device, a sensor is arranged in the protection device and is electrically connected with the control unit, the sensor collects the flue gas pressure, temperature, oil content and water content data at the air inlet of the separation membrane, when the flue gas at the position is in an over-temperature and over-pressure condition, the control unit starts an audible and visual alarm system in the protection device and controls the second pressure regulating valve 8 to be closed, so that the flue gas cannot enter the flue gas separation membrane module 6, and a membrane tube is protected; meanwhile, when the sensors acquire that the oil content, the water content and the like of the smoke possibly damage the membrane tube, the control unit can also start an audible and visual alarm system in the protection device, the whole set of smoke component adjusting equipment is automatically stopped, the smoke outlet is closed, and operating personnel are reminded to carry out troubleshooting.
Further, the flue gas separation device and the flue gas injection device can realize the switching of two modes of parallel connection and series connection, when high-concentration components are required to be adjusted, the flue gas outlet can be closed, and the flue gas is subjected to a continuous circulation mode of primary pressurization, buffering, cold drying, membrane separation and back mixing until the components meet the design requirements.
In summary, by arranging the flue gas injection device, flue gas can flow into an oil reservoir through the device, and meanwhile, the flue gas separation membrane assembly 6, the first pressure regulating valve 7, the back-mixing discharge regulating valve 9 and the monitoring controller are arranged, flue gas parameters of corresponding positions are collected by the monitoring controller and are compared with preset flue gas parameters, namely, when the proportion of the flue gas components flowing from the back-mixing discharge regulating valve 9 to a flue gas inlet is larger than or smaller than the preset flue gas component proportion, the monitoring controller can adjust the first pressure regulating valve 7 and/or the back-mixing discharge regulating valve 9 to enable the flue gas component proportion to reach the preset value, so that the proportion of carbon dioxide in the flue gas can be adjusted, the component proportion of the flue gas in the oil reservoir can be adjusted according to different oil reservoir proportions, and the flue gas can be injected into different oil reservoirs. The technical problem that the proportion of carbon dioxide in flue gas can not be adjusted and then injected into different oil reservoirs in the prior art is solved.
Meanwhile, the backwashing function of the flue gas separation membrane assembly 6 is realized through the cooperation of the first pressure regulating valve 7 and the second pressure regulating valve 8, and the phenomena of pressure difference rising and obvious reduction of gas separation flux can occur after the flue gas separation membrane assembly 6 is operated for a long time, so that an internal and external pressure switching mode and a flow reverse flushing mode are combined, the flue gas separation membrane assembly 6 is automatically cleaned and regenerated by utilizing gas, and the efficient operation working condition of a membrane tube is ensured. In addition, the flue gas separation membrane module 6 is also provided with a protection device, so that the flue gas separation membrane module 6 is protected.
In order to more clearly illustrate the technical solution of the present invention, the working principle of the present invention is further illustrated below by taking the embodiments shown in fig. 1 to fig. 4 as examples:
flue gas enters from a flue gas inlet, the total amount is Q, wherein Q = Q1+ Q2, and the flue gas proportion is as follows: the nitrogen content is 80%, the carbon dioxide content is 17%, and other impurity gases are 3%, and the nitrogen content, the carbon dioxide content and the other impurity gases are divided into two paths through a buffer device:
1) one path directly flows to a smoke outlet after passing through a freeze dryer, and the flow rate is Q1;
2) the other path passes through a gas heat exchanger 4 and a temperature compensation electric heater 5, the flow rate is Q2 (the nitrogen content is 80%, the carbon dioxide content is 17%, and other impurity gases are 3%), the nitrogen components in the flue gas are mainly removed through a flue gas separation membrane module 6, the residual gas amount is Q2 ' (Q2 ' = Q2-Q2 "), namely the amount of the first flue gas component is Q2 ', and the amount of the second flue gas component is Q2"; wherein the first smoke component is constituted by (carbon dioxide a%, other gases b%) being incorporated back into Q, when the total gas content is Q + Q2 ', when the carbon dioxide concentration is (a% × Q2 ' +17% Q)/(Q2 ' + Q));
3) the total amount of the gas Q + Q2' is divided into two paths continuously through the original flow, one path directly flows to the flue gas outlet, and the other path continuously passes through the flue gas separation membrane component 6 and the back-mixing discharge regulating valve 9 for separation and back-mixing, thereby realizing the adjustment of the proportion of the components of the flue gas.
The invention also discloses a working method of the flue gas component adjusting equipment, which comprises the following steps,
flue gas injection: the flue gas enters the flue gas injection device, wherein one part of the flue gas flows into the oil deposit through the flue gas outlet, and the other part of the flue gas flows into the flue gas regulating port.
Specifically, the flue gas enters a supercharging device 1 to be supercharged and then flows to a buffer device 2, the buffer device 2 is used for stabilizing the airflow of the flue gas, the flue gas with stable airflow is divided into two paths to flow to a temperature adjusting device, and the temperature of the flue gas is adjusted through the temperature adjusting device, namely the temperature of the flue gas is adjusted through a freeze dryer 3 and a gas heat exchanger 4, so that the temperature of the flue gas can meet the preset temperature requirement; wherein, one path of flue gas flows into the oil reservoir through the flue gas outlet after passing through the temperature regulating device, and the other path of flue gas flows to the flue gas separation membrane component 6 through the flue gas regulating port after passing through the temperature regulating device; meanwhile, if the temperature of the flue gas cannot meet the requirement after the flue gas in the path is regulated by the gas heat exchanger 4 and the freeze dryer 3, the temperature of the flue gas is regulated by intermittently starting the temperature compensation electric heater 5, so that the optimum working temperature of the flue gas separation membrane assembly 6 is ensured.
Flue gas separation: the flue gas flowing to the flue gas adjusting opening flows into the flue gas separation membrane assembly 6, the flue gas is divided into a first path of flue gas component and a second path of flue gas component after passing through the flue gas separation membrane assembly 6, the first path of flue gas component flows into the flue gas inlet through the back-mixing discharge adjusting valve 9 for back mixing, and the second path of flue gas component flows into the external environment through the back-mixing discharge adjusting valve 9;
specifically, the flue gas in the flue gas adjusting port flows into the flue gas separation membrane module 6, and the flue gas components are separated by the flue gas separation membrane module 6. Namely, the separated first flue gas component sequentially passes through the gas outlet of the first separation membrane group and the back-mixing discharge regulating valve 9 to flow into the flue gas inlet, and the main component of the first flue gas component is mainly carbon dioxide; the gas outlet of the second separation membrane group is communicated with the first pressure regulating valve 7, the separated second flue gas component is discharged to the external environment through the gas outlet of the second separation membrane group and the back-mixing discharge regulating valve 9 in sequence, and the second flue gas component is mainly nitrogen. Therefore, the flue gas is separated by the flue gas separation membrane module 6.
Adjusting and back-doping smoke components: respectively collecting the flue gas component proportions of a gas outlet and a flue gas outlet which are communicated with the flue gas inlet by the back-mixing discharge regulating valve 9, and comparing the collected flue gas component proportions with the preset flue gas component proportions:
when the component proportion of the carbon dioxide in the collected flue gas is smaller than a preset value, adjusting a first pressure regulating valve 7 to increase the concentration of the carbon dioxide in the first flue gas component, and/or adjusting a back-mixing discharge regulating valve 9 to increase the back-mixing amount of the first flue gas component;
when the component proportion of the carbon dioxide in the collected flue gas is larger than the preset value, the first pressure regulating valve 7 is regulated to reduce the concentration of the carbon dioxide in the first flue gas component, and/or the back-mixing discharge regulating valve 9 is regulated to reduce the back-mixing amount of the first flue gas component.
Specifically, according to the collected flue gas component proportion, the flue gas component proportion of the flue gas separation membrane assembly 6 can be adjusted by adjusting the first pressure regulating valve 7, and when the component proportion of carbon dioxide in the collected flue gas is smaller than a preset value, the first pressure regulating valve 7 is adjusted to increase the concentration of the carbon dioxide in the first flue gas component for back mixing; when the component proportion of the carbon dioxide in the collected flue gas is larger than a preset value, adjusting a first pressure adjusting valve 7 to reduce the concentration of the carbon dioxide in the first flue gas component for back mixing; the back mixing amount of the flue gas can also be adjusted by adjusting the back mixing discharge adjusting valve 9, and when the component proportion of the carbon dioxide in the collected flue gas is smaller than a preset value, the back mixing discharge adjusting valve 9 is adjusted to increase the back mixing amount of the first flue gas component; when the component proportion of the carbon dioxide in the collected flue gas is larger than a preset value, adjusting a back-mixing discharge adjusting valve 9 to reduce the back-mixing amount of the first flue gas component; also can adjust first pressure regulating valve 7 and back mixing discharge control valve 9 simultaneously, adjust the concentration of carbon dioxide in the first flue gas component and the back mixing volume of first flue gas component simultaneously promptly, realize the regulation to carbon dioxide proportion in the flue gas, and then can adjust the component proportion of flue gas according to the oil deposit of difference, make the flue gas pour into different oil deposits from this. The technical problem that the proportion of carbon dioxide in flue gas can not be adjusted and then injected into different oil reservoirs in the prior art is solved.
Further comprises a regeneration step of the flue gas separation membrane component 6, which specifically comprises,
collecting pressure P1 at the air inlet of the separation membrane group, pressure P2 at the air outlet of the first separation membrane group and pressure P3 at the air outlet of the second separation membrane group, and the difference between the pressure P1 and the pressure P2 is recorded as Δ P1, the difference between the pressure P1 and the pressure P3 is recorded as Δ P2, and the size of the Δ P1, the Δ P2 and a preset value P0 is judged;
when the Δ P1 is P0 and/or the Δ P2 is P0, the first pressure regulating valve 7 and the second pressure regulating valve 8 are regulated to enable the flue gas to reversely flow, and the reverse flushing of the flue gas separation membrane component 6 is realized.
Specifically, after the flue gas separation membrane module 6 is operated for a long time, the phenomena of pressure difference increase and gas separation flux obvious reduction occur, and at the moment, an internal and external pressure switching mode and a flow reverse flushing mode are combined, so that the flue gas separation membrane module 6 is automatically cleaned and regenerated by using gas, and the efficient operation working condition of a membrane tube is ensured. Specifically, the control unit controls the first pressure regulating valve 7 and the second pressure regulating valve 8, so that the pressure P1 at the air inlet of the separation membrane group is smaller than the pressure P2 at the air outlet of the first separation membrane group, and the pressure P3 at the air outlet of the second separation membrane group is smaller than the pressure P2 at the air outlet of the first separation membrane group, so that the flue gas respectively flows to the air inlet of the separation membrane group and the air outlet of the second separation membrane group from the air outlet of the first separation membrane group, namely the flue gas reversely flows, thereby realizing the reverse cleaning of the membrane tubes. Meanwhile, through adjusting the first pressure adjusting valve 7 and the second pressure adjusting valve 8, the pressure P1 of the air inlet of the separation membrane group can be smaller than the pressure P3 of the air outlet of the second separation membrane group, and the pressure P2 of the air outlet of the first separation membrane group is smaller than the pressure P3 of the air outlet of the second separation membrane group, so that the flue gas flows to the air inlet of the separation membrane group and the air outlet of the first separation membrane group from the air outlet of the second separation membrane group, the flow of the flue gas moves in the reverse direction, namely the flue gas flows in the reverse direction to realize the reverse cleaning of the membrane tubes.
In summary, by arranging the flue gas injection device, flue gas can flow into an oil reservoir through the device, and meanwhile, the flue gas separation membrane assembly 6, the first pressure regulating valve 7, the back-mixing discharge regulating valve 9 and the monitoring controller are arranged, flue gas parameters of corresponding positions are collected through the monitoring controller and are compared with preset flue gas parameters, namely, when the proportion of the flue gas components flowing from the back-mixing discharge regulating valve 9 to the flue gas inlet is larger than or smaller than the preset flue gas component proportion, the monitoring controller enables the flue gas component proportion to reach the preset value by adjusting the first pressure regulating valve and the back-mixing discharge regulating valve, so that the proportion of carbon dioxide in the flue gas can be adjusted, and further the proportion of the flue gas components can be adjusted according to different oil reservoirs, and therefore, the flue gas can be injected into different oil reservoirs.
Claims (10)
1. A flue gas component regulating device is characterized by comprising,
the device comprises a smoke injection device, a smoke inlet, a smoke outlet and a smoke adjusting port, wherein one end of the smoke injection device is provided with the smoke inlet, the other end of the smoke injection device is provided with the smoke outlet and the smoke adjusting port, and smoke is injected into an oil reservoir through the smoke outlet;
the gas inlet of the flue gas separation membrane component is communicated with the flue gas adjusting port;
the gas inlet of the first pressure regulating valve is communicated with the gas outlet of the flue gas separation membrane component;
the back mixing discharge regulating valve has a gas inlet connected to the first pressure regulating valve and a gas outlet communicated to the fume inlet and the outside environment;
and the monitoring controller is electrically connected with the first pressure regulating valve and the back mixing discharge regulating valve and is used for monitoring and regulating and controlling the flue gas parameters.
2. The flue gas component conditioning apparatus of claim 1, wherein the flue gas separation membrane module comprises,
an air inlet of the separation membrane group is communicated with the smoke regulating port,
the first separation membrane group gas outlet is communicated with the first pressure regulating valve, and the separated first flue gas component sequentially passes through the first separation membrane group gas outlet, the first pressure regulating valve and the back-mixing discharge regulating valve and flows into a flue gas inlet;
and the second gas component flows to the external environment sequentially through the second separation membrane group gas outlet, the first pressure regulating valve and the back-mixing discharge regulating valve.
3. The flue gas component conditioning apparatus of claim 1 or 2, further comprising a second pressure regulating valve having an inlet in communication with the flue gas conditioning port and an outlet in communication with the inlet of the flue gas separation membrane assembly.
4. The flue gas component conditioning apparatus of claim 3, wherein a flue gas flow regulating valve is disposed between the flue gas separation membrane assembly and the second pressure regulating valve.
5. The flue gas component conditioning apparatus of claim 3, wherein the flue gas injection means comprises,
the air inlet end of the supercharging device is communicated with the flue gas inlet;
the air inlet end of the buffer device is communicated with the air outlet end of the supercharging device;
the air inlet end of the temperature adjusting device is connected with the air outlet end of the buffer device, and the air outlet end of the temperature adjusting device is communicated with the flue gas adjusting port;
wherein, the flue gas passes through buffer divides into two the tunnel, and wherein flue gas of the same way injects into the oil reservoir through the exhanst gas outlet, and another way flue gas flow direction temperature regulation apparatus just passes through the flue gas is adjusted the mouth and is flowed to flue gas separation membrane subassembly department.
6. The flue gas component conditioning apparatus of claim 5, wherein the temperature conditioning device comprises a freeze dryer, a gas heat exchanger, the gas heat exchanger being in series with the freeze dryer.
7. The flue gas component adjusting apparatus according to claim 6, wherein the temperature adjusting device further comprises a temperature compensation electric heater connected to the gas heat exchanger, and a gas outlet of the temperature compensation electric heater is communicated with the second pressure adjusting valve.
8. The flue gas composition conditioning apparatus of claim 1, wherein the monitoring controller comprises,
a control unit;
the component monitoring unit is electrically connected with the control unit and is used for collecting the component proportion of the flue gas of the gas outlet of the back-mixing emission regulating valve communicated with the flue gas inlet and the gas outlet of the first separation membrane group;
and the pressure monitoring unit is electrically connected with the control unit and is used for acquiring pressure data of the gas inlet of the flue gas separation membrane group, the gas outlet of the first separation membrane group and the gas outlet of the second separation membrane group.
9. A method of operating a flue gas composition conditioning apparatus according to any of claims 1 to 8, comprising,
flue gas injection: the flue gas enters the flue gas injection device and then is divided into two paths of flue gas, wherein one path of flue gas flows into the oil reservoir through the flue gas outlet, and the other part of flue gas flows to the flue gas adjusting port;
flue gas separation: the flue gas flowing to the flue gas adjusting opening flows into a flue gas separation membrane component, the flue gas is divided into a first path of flue gas component and a second path of flue gas component after passing through the flue gas separation membrane component, the first path of flue gas component flows into the flue gas inlet through a back-mixing discharge adjusting valve for back mixing, and the second path of flue gas component flows into the external environment through the back-mixing discharge adjusting valve;
adjusting and back-doping smoke components: respectively collecting the flue gas component proportions of a gas outlet and a flue gas outlet which are communicated with a flue gas inlet by a back-mixing discharge regulating valve, and comparing the collected flue gas component proportions with preset flue gas component proportions:
when the component proportion of the carbon dioxide in the collected flue gas is smaller than a preset value, adjusting a first pressure regulating valve to increase the concentration of the carbon dioxide in the first flue gas component, and/or adjusting a back-mixing discharge regulating valve to increase the back-mixing amount of the first flue gas component;
and when the component proportion of the carbon dioxide in the collected flue gas is larger than a preset value, adjusting the first pressure regulating valve to reduce the concentration of the carbon dioxide in the first flue gas component, and/or adjusting the back-mixing discharge regulating valve to reduce the back-mixing amount of the first flue gas component.
10. The method according to claim 9, further comprising a flue gas separation membrane module regeneration step, which comprises,
collecting pressure P1 at the air inlet of the separation membrane group, pressure P2 at the air outlet of the first separation membrane group and pressure P3 at the air outlet of the second separation membrane group, and the difference between the pressure P1 and the pressure P2 is recorded as Δ P1, the difference between the pressure P1 and the pressure P3 is recorded as Δ P2, and the size of the Δ P1, the Δ P2 and a preset value P0 is judged;
when the Δ P1 is P0 and/or the Δ P2 is P0, the first pressure adjusting valve, the second pressure adjusting valve and the back-mixing discharge adjusting valve are adjusted to enable the flue gas to reversely flow, and the reverse flushing of the flue gas separation membrane component is realized.
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Effective date of registration: 20230703 Address after: 100020 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Address before: No. 906 Xisi Road, Dongying District, Dongying City, Shandong Province, 257000 Patentee before: SHENGLI OIL FIELD SHENGJI PETROLEUM EQUIPMENT Co.,Ltd. |