Flue gas assisted steam flooding ground equipment heat energy comprehensive utilization system

Abstract

The utility model discloses a heat energy comprehensive utilization system of flue gas auxiliary steam flooding ground equipment. The heat energy comprehensive utilization system comprises a boiler, a flue gas drying and pressurizing pry, a sleeve, a heat exchanger and a softened water storage tank, a gas inlet of the flue gas drying and pressurizing pry is connected with an exhaust port of the boiler so as to dry and pressurize high-temperature and normal-pressure flue gas generated by the boiler; an exhaust port of the flue gas drying and pressurizing pry is connected with a sleeve, so that high-temperature and high-pressure dried flue gas subjected to drying and pressurizing treatment is injected into the sleeve; a steam exhaust port of the boiler is connected with the sleeve so as to inject steam generated by the boiler into the sleeve; a water outlet of the softened water storage tank is connected with a water inlet of the flue gas drying and pressurizing pry, a water outlet of the flue gas drying and pressurizing pry is connected with a primary water inlet of the heat exchanger, and a primary water outlet of the heat exchanger is connected with the softened water storage tank. According to the utility model, heat energy in the process can be recycled, and meanwhile, the equipment energy consumption of flue gas assisted steam oil displacement can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of comprehensive utilization of heat energy of flue gas assisted steam flooding ground equipment. More specifically, the utility model relates to a comprehensive utilization system of heat energy of flue gas assisted steam flooding ground equipment. Background Art

[0002] As green development becomes increasingly important, flue gas generated by boiler combustion is the main exhaust gas emitted by oil fields and is the focus of carbon dioxide emission reduction in the heavy oil production process of oil fields. China is in the initial stage of CCUS technology development. The flue gas high-pressure gas injection equipment and ground supporting process flow of heavy oil steam thermal recovery are not yet mature, and there is no mature energy-saving plan for comprehensive utilization of thermal energy. Utility Model Content

[0003] In order to achieve these purposes and other advantages according to the utility model, a preferred embodiment of the utility model provides a flue gas assisted steam flooding ground equipment heat energy comprehensive utilization system, including a boiler, a flue gas drying and boosting skid, a casing, a heat exchanger and a softened water storage tank;

[0004] The air inlet of the flue gas drying and pressurizing skid is connected to the exhaust port of the boiler to dry and pressurize the high-temperature and normal-pressure flue gas generated by the boiler;

[0005] The exhaust port of the flue gas drying and pressurizing skid is connected to the casing to inject the high-temperature and high-pressure dry flue gas that has been dried and pressurized into the casing; the steam exhaust port of the boiler is connected to the casing to inject the steam generated by the boiler into the casing;

[0006] The drain outlet of the softened water storage tank is connected to the water inlet of the flue gas drying and boosting skid, the drain outlet of the flue gas drying and boosting skid is connected to the primary water inlet of the heat exchanger, and the primary drain outlet of the heat exchanger is connected to the softened water storage tank.

[0007] According to a preferred embodiment of the utility model, a circulating water pump is further provided between the softened water storage tank and the flue gas drying and pressurizing skid.

[0008] According to a preferred embodiment of the utility model, the flue gas assisted steam oil recovery ground equipment thermal energy comprehensive utilization system also includes a water purification skid, whose secondary water inlet is connected to the softened water storage tank, and whose secondary discharge outlet is connected to the boiler through a heat exchanger.

[0009] According to a preferred embodiment of the present utility model, the water purification skid is also connected to the softened water storage tank to replenish the softened water into the softened water storage tank.

[0010] According to a preferred embodiment of the present invention, the casing is a downhole casing.

[0011] According to a preferred embodiment of the present utility model, a water level detector is installed in the softened water storage tank.

[0012] The utility model at least includes the following beneficial effects: the flue gas assisted steam flooding surface equipment heat energy comprehensive utilization system of the utility model can reduce the energy consumption of the flue gas assisted steam flooding equipment while realizing the recycling of heat energy in the process.

[0013] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the framework of the thermal energy comprehensive utilization system of the flue gas assisted steam oil recovery ground equipment in the utility model. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0016] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0017] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention 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. Therefore, the above terms should not be understood as limiting the present invention.

[0018] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0019] like Figure 1As shown, a flue gas assisted steam flooding ground equipment heat energy comprehensive utilization system of the utility model comprises a boiler 1, a flue gas drying and pressurizing skid 2, a casing 3, a heat exchanger 4, a softened water storage tank 5, and a water purification skid 6;

[0020] The air inlet of the flue gas drying and pressurizing skid 2 is connected to the exhaust port of the boiler 1 to dry and pressurize the high-temperature and normal-pressure flue gas generated by the boiler 1;

[0021] The exhaust port of the flue gas drying and pressurizing skid 2 is connected to the casing 3 to inject the high-temperature and high-pressure dry flue gas that has been dried and pressurized into the casing 3; the steam exhaust port of the boiler 1 is connected to the casing 3 to inject the steam generated by the boiler 1 into the casing 3; the casing 3 is a downhole casing.

[0022] The drain outlet of the softened water storage tank 5 is connected to the water inlet of the flue gas drying and boosting skid 2 , the drain outlet of the flue gas drying and boosting skid 2 is connected to the primary water inlet of the heat exchanger 4 , and the primary drain outlet of the heat exchanger 4 is connected to the softened water storage tank 5 .

[0023] The flue gas assisted steam flooding ground equipment heat energy comprehensive utilization system further includes a water purification skid 6, whose secondary water inlet is connected to the softened water storage tank 5, and whose secondary drain is connected to the boiler 1 through a heat exchanger, that is, the secondary water inlet of the heat exchanger 4 is connected to the secondary drain of the water purification skid 6, and the secondary drain of the heat exchanger 4 is connected to the boiler 1. The water purification skid 6 is also connected to the softened water storage tank 5, and the softened water is replenished into the softened water storage tank 5.

[0024] In the above technical scheme, the water in the softened water storage tank 5 is used as cooling water for the flue gas drying and pressurizing skid 2. The high-temperature and normal-pressure flue gas generated by the boiler 1 is compressed by the flue gas drying and pressurizing skid 2 and then pressurized and heated. The normal-temperature water in the softened water storage tank 5 exchanges heat with the pressurized and heated flue gas to cool the pressurized and heated flue gas. At the same time, the water is heated. The heated water exchanges heat with boiler water, or is directly purified by the water purification skid 6. The water source of the water purification skid 6 comes from boiler water. The purified boiler water is preheated by the heat exchanger 4. The whole process can not only cool the pressurized and heated flue gas, reduce the energy consumption of equipment that needs to be cooled by an air cooler after the compressed gas temperature rises, but also preheat the purified boiler water to reduce the energy consumption required for preheating the boiler water.

[0025] In another technical solution of the utility model, a circulating water pump 7 is further provided between the softened water storage tank 5 and the flue gas drying and pressurizing skid 2 to pump water into the flue gas drying and pressurizing skid 2 .

[0026] In another technical solution of the utility model, a water level detector is installed in the softened water storage tank 5. When the water level detector detects that the water level in the softened water storage tank 5 does not reach a preset value, it reminds the water purification skid to replenish and inject softened water into the softened water storage tank.

[0027] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A flue gas assisted steam flooding ground equipment thermal energy comprehensive utilization system, characterized in that: Includes boiler, flue gas drying and boosting skid, casing, heat exchanger and softened water storage tank; The air inlet of the flue gas drying and pressurizing skid is connected to the exhaust port of the boiler to dry and pressurize the high-temperature and normal-pressure flue gas generated by the boiler; The exhaust port of the flue gas drying and pressurizing skid is connected to the casing to inject the high-temperature and high-pressure dry flue gas that has been dried and pressurized into the casing; the steam exhaust port of the boiler is connected to the casing to inject the steam generated by the boiler into the casing; The drain outlet of the softened water storage tank is connected to the water inlet of the flue gas drying and boosting skid, the drain outlet of the flue gas drying and boosting skid is connected to the primary water inlet of the heat exchanger, and the primary drain outlet of the heat exchanger is connected to the softened water storage tank.

2. The flue gas assisted steam flooding ground equipment thermal energy comprehensive utilization system according to claim 1, characterized in that: A circulating water pump is also provided between the softened water storage tank and the flue gas drying and pressurizing skid.

3. The flue gas assisted steam flooding ground equipment thermal energy comprehensive utilization system according to claim 1, characterized in that: It also includes a water purification skid, whose secondary water inlet is connected to the softened water storage tank, and whose secondary water outlet is connected to the boiler through a heat exchanger.

4. The flue gas assisted steam flooding ground equipment thermal energy comprehensive utilization system according to claim 3, characterized in that: The water purification skid is also connected to the softened water storage tank to replenish and inject softened water into the softened water storage tank.

5. The flue gas assisted steam flooding ground equipment thermal energy comprehensive utilization system according to claim 1, characterized in that: The casing is a downhole casing.

6. The flue gas assisted steam flooding ground equipment thermal energy comprehensive utilization system according to claim 1, characterized in that: A water level detector is installed in the softened water storage tank.

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