Steam boiler water treatment system applied to various water sources

Abstract

The utility model discloses a steam boiler water treatment system applied to various water sources, which comprises the following devices which are sequentially connected according to the flowing direction of the water sources: a water source temperature adjusting device used for adjusting the water temperature of the water sources to the temperature required by a follow-up treatment mechanism; the solid particle filtering mechanism is used for removing large-particle impurities in a water source; the inorganic ultrafiltration membrane is used for removing small-particle suspended matters and colloids in a water source; the water quality treatment mechanism is used for removing ions in a water source; and the thermal deaerator is used for removing dissolved oxygen in water. According to the utility model, the water source well water is firstly selected as a water source, so that the water source can be converted into seawater from the water source well water through simple pipeline switching when the water source well water contains oil or other system faults are found, and the normal operation of the boiler water treatment system is maintained.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, and in particular relates to a steam boiler water treatment system applied to various water sources. Background Art

[0002] With the development of economy, the demand for oil and gas resources in modern industry and life is gradually increasing. The effective development of oil and gas resources can play a strong role in protecting the national economy and life. As the progress of oil extraction gradually advances, the oil and gas resources that are easier to extract, such as light oil, are gradually decreasing, and the extraction of heavy oil and heavy oil has gradually come into people's view. The characteristics of heavy oil are high density, high viscosity and high freezing point, which increase the difficulty of its extraction. Efficient extraction of heavy oil is one of the problems people face.

[0003] Steam huff and puff technology or steam flooding technology are the two main technologies for thermal recovery of heavy oil. Both require the injection of high-temperature and high-pressure steam into the formation to increase the temperature of the formation crude oil, reduce the viscosity of the crude oil, and increase the fluidity of the crude oil. Steam has relatively strict requirements on the quality of the water source. Due to its special nature, offshore platforms are short of fresh water resources and can only use seawater or well water as the water source.

[0004] Seawater and well water each have their own unique characteristics: seawater resources are abundant, but it is very difficult to process; the treatment process of well water is simple, but it also has the risk of containing oil.

[0005] Chinese patent document CN112125462A discloses a thermal recovery boiler feed water treatment device for an offshore thermal recovery platform; Chinese patent document CN213237490U discloses a multi-fuel steam injection boiler system suitable for offshore heavy oil development. The above patents do not consider the applicability of the boiler from the perspective of water sources, fail to better adapt to the current situation of lack of fresh water resources on offshore platforms and the possibility of oil in formation water, and fail to enhance the adaptability of the boiler to different water sources. Utility Model Content

[0006] The utility model is proposed to overcome the shortcomings in the prior art, and its purpose is to provide a steam boiler water treatment system applicable to a variety of water sources.

[0007] The utility model is realized by the following technical solutions:

[0008] A steam boiler water treatment system applied to multiple water sources, comprising:

[0009] A water source temperature regulating device, which is used to adjust the water source temperature to the temperature required by the subsequent processing mechanism;

[0010] Solid particle filtering mechanism, which is used to remove large particle impurities in the water source;

[0011] Inorganic ultrafiltration membrane unit, which is used to remove small suspended particles and colloids in water sources;

[0012] A water treatment mechanism for removing ions from a water source;

[0013] Thermal deaerator, which is used to remove dissolved oxygen from water;

[0014] The water source temperature regulating device, the solid particle filtering mechanism, the inorganic ultrafiltration membrane, the water quality treatment mechanism and the thermal deaerator are connected in sequence according to the water flow direction.

[0015] In the above technical solution, the water source temperature regulating device is a heat exchanger and a cooler.

[0016] In the above technical scheme, when the water source is seawater, the water source temperature regulating device is a heat exchanger, seawater enters from the cold fluid inlet of the heat exchanger, and the cold fluid of the heat exchanger is connected to the solid particle filtering mechanism after it exits; when the water source is well water, the water source temperature regulating device is a cooler, well water enters from the hot fluid inlet of the cooler, and the hot fluid of the cooler is connected to the solid particle filtering mechanism after it exits, and the cooling medium of the cooler is seawater.

[0017] In the above technical solution, the solid particle filtering mechanism includes a sedimentation tank and a dual-media filter which are sequentially connected according to the water flow direction, and the outlet of the dual-media filter is connected to the inorganic ultrafiltration membrane unit.

[0018] In the above technical solution, the water treatment mechanism is a combination of a reverse osmosis unit and an electrodialysis device or a combination of a reverse osmosis unit and a sodium ion exchanger.

[0019] In the above technical solution, when the water source is seawater, the water quality treatment mechanism includes a primary seawater reverse osmosis unit, a secondary seawater reverse osmosis unit, a tertiary seawater reverse osmosis unit and an EDI device connected in sequence according to the water flow direction.

[0020] In the above technical solution, the concentrate of the first-stage seawater reverse osmosis unit is directly discharged into the sea, the concentrate outlet of the second-stage seawater reverse osmosis unit is connected to the inorganic ultrafiltration membrane unit, and the concentrate outlet of the third-stage seawater reverse osmosis unit is connected to the first-stage seawater reverse osmosis unit.

[0021] In the above technical solution, when the water source is well water, the water quality treatment mechanism includes a primary well water reverse osmosis unit, a primary sodium ion exchanger and a secondary sodium ion exchanger which are sequentially connected according to the water flow direction.

[0022] In the above technical solution, when the water source is well water, the well water is connected to the hot fluid inlet of the heat exchanger after being treated by a thermal deaerator.

[0023] The beneficial effects of the utility model are:

[0024] The utility model provides a steam boiler water treatment system applicable to various water sources, wherein well water is preferably used as the water source, and when the well water contains oil or other system failures are found, the water source can be converted from well water to sea water through a simple pipeline switch to maintain the normal operation of the boiler water treatment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the utility model (the dotted line is the processing route of the steam boiler water treatment system when the water source is well water; the solid line is the processing route of the steam boiler water treatment system when the water source is seawater).

[0026] in:

[0027] 1 Heat exchanger 2 Sedimentation tank

[0028] 3 Dual media filter 4 Inorganic ultrafiltration membrane unit

[0029] 5. Primary seawater reverse osmosis unit 6. Secondary seawater reverse osmosis unit

[0030] 7Three-stage seawater reverse osmosis unit 8 EDI device

[0031] 9 Thermal deaerator 10 Cooler

[0032] 11. Primary well water reverse osmosis unit 12. Primary sodium ion exchanger

[0033] 13 Secondary sodium ion exchanger.

[0034] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0036] like Figure 1 As shown, a steam boiler water treatment system applicable to multiple water sources includes:

[0037] A water source temperature regulating device, which is used to adjust the water source temperature to the temperature required by the subsequent processing mechanism;

[0038] Solid particle filtering mechanism, which is used to remove large particle impurities in the water source;

[0039] Inorganic ultrafiltration membrane unit, which is used to remove small suspended particles and colloids in water sources;

[0040] A water treatment mechanism for removing ions from a water source;

[0041] Thermal deaerator is used to remove dissolved oxygen in water, which enters the boiler system after meeting the boiler supply water index requirements.

[0042] The water source temperature regulating device is a heat exchanger 1 and a cooler 10:

[0043] When the water source is seawater, the water source temperature regulating device is a heat exchanger 1, and the seawater enters from the cold fluid inlet of the heat exchanger 1. The cold fluid of the heat exchanger 1 is connected to the solid particle filtering mechanism after exiting. The temperature of the seawater is increased to above 10°C after being processed by the heat exchanger 1.

[0044] When the water source is well water, the water source temperature regulating device is a cooler 10. The well water enters from the hot fluid inlet of the cooler 10. The hot fluid of the cooler 10 is connected to the solid particle filtering mechanism after exiting. The cooling medium of the cooler 10 adopts seawater. The well water is cooled to 25°C to 35°C after being processed by the cooler 10.

[0045] The solid particle filtering mechanism includes a sedimentation tank 2 and a dual-media filter 3 which are connected in sequence according to the water flow direction, and the outlet of the dual-media filter 3 is connected to an inorganic ultrafiltration membrane unit; the sedimentation tank 2 removes a portion of solid particles in the water source; the dual-media filter 3 is used to remove larger particle impurities in the water source.

[0046] The inorganic ultrafiltration membrane unit 4 is used to remove small suspended particles and colloids in the water source, meet the water quality index of NTU<1, and enter the reverse osmosis device of the water quality treatment mechanism after reaching the reverse osmosis membrane inlet index.

[0047] The water treatment mechanism is a combination of a reverse osmosis unit and an electrodialysis device or a combination of a reverse osmosis unit and a sodium ion exchanger:

[0048] When the water source is seawater, the water quality treatment mechanism includes a primary seawater reverse osmosis unit 5, a secondary seawater reverse osmosis unit 6, a tertiary seawater reverse osmosis unit 7 and an EDI device 8 connected in sequence according to the direction of water flow; the primary seawater reverse osmosis unit 5, the secondary seawater reverse osmosis unit 6 and the tertiary seawater reverse osmosis unit 7 are combined to remove most of the Na in the seawater. + The concentrated water of the primary seawater reverse osmosis unit 5 is directly discharged into the sea, the concentrated water outlet of the secondary seawater reverse osmosis unit 6 is connected to the inorganic ultrafiltration membrane unit 4, and the concentrated water outlet of the tertiary seawater reverse osmosis unit 7 is connected to the primary seawater reverse osmosis unit 5; the EDI device 8 is used to effectively remove various inorganic salts in the seawater, and the use of an electrodialysis device can further reduce the salt content in the water, which can further ensure the operation of the thermal recovery boiler;

[0049] When the water source is well water, the water quality treatment mechanism includes a primary well water reverse osmosis unit 11, a primary sodium ion exchanger 12 and a secondary sodium ion exchanger 13 connected in sequence according to the water flow direction; the primary well water reverse osmosis unit 11 removes most of the Na + , Cl - , Ca 2+ Mg 2+ The concentrated water from the primary well water reverse osmosis unit 11 is directly discharged into the sea; the primary sodium ion exchanger 12 and the secondary sodium ion exchanger 13 thoroughly remove the remaining Ca 2+ Mg 2+ Ions of equal hardness.

[0050] When the water source is well water, the well water is treated by a thermal deaerator and then connected to the hot fluid inlet of the heat exchanger. The treated well water exchanges heat with seawater that needs to be heated, thereby heating the seawater and making full use of the heat.

[0051] The use of the utility model:

[0052] (a) When the water source well does not contain oil, the water source well water is used as the water source, and the water treatment system adopts Figure 1 As shown by the middle dotted line, the control method is to connect the settling tank 2 with the cooler 10, and connect the secondary sodium ion exchanger, the thermal deoxidation device and the thermal recovery boiler;

[0053] When the water source is well water, the steam water treatment process adopts pretreatment system (cooler + filter + inorganic ultrafiltration) + reverse osmosis system (primary / secondary reverse osmosis) + desalination (sodium ion exchanger / EDI electric desalination) + deoxygenation (thermal deoxygenation) to meet the water quality index requirements of the thermal recovery boiler inlet;

[0054] (b) When the water source well contains oil, the water source can be converted from the water source well to seawater. The water treatment system adopts Figure 1 As shown by the solid line, the control method is to connect the settling tank 2 with the heat exchanger 1, and connect the electrodialysis device 8, the thermal deoxygenation device 9, the heat exchanger 1 and the thermal recovery boiler;

[0055] Due to the complex composition of seawater, different contents of soluble solids and suspended matter, and high mineralization and hardness, seawater filtration, water softening and desalination are difficult. The steam water treatment process adopts a pretreatment system (sedimentation tank + multi-stage filter + inorganic ultrafiltration) + reverse osmosis system (three-stage reverse osmosis) + desalination (electrodialysis desalination) + deoxygenation (thermal deoxygenation) to meet the water quality index requirements at the inlet of the thermal recovery boiler.

[0056] (c) In case of system failure or other emergencies, the water source will be switched between seawater and well water to maintain the normal operation of the boiler water treatment system.

[0057] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0058] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0059] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0060] The applicant declares that the above is only a specific implementation method of the present utility model, but the protection scope of the present utility model is not limited thereto. The technicians in the relevant technical field should understand that any changes or substitutions that can be easily thought of by the technicians in the relevant technical field within the technical scope disclosed in the present utility model fall within the protection scope and disclosure scope of the present utility model.

Claims

1. A steam boiler water treatment system applied to multiple water sources, characterized by: include: A water source temperature regulating device, which is used to adjust the water source temperature to the temperature required by the subsequent processing mechanism; Solid particle filtering mechanism, which is used to remove large particle impurities in the water source; Inorganic ultrafiltration membrane unit, which is used to remove small suspended particles and colloids in water sources; A water treatment mechanism for removing ions from a water source; Thermal deaerator, which is used to remove dissolved oxygen from water; The water source temperature regulating device, the solid particle filtering mechanism, the inorganic ultrafiltration membrane, the water quality treatment mechanism and the thermal deaerator are connected in sequence according to the water flow direction.

2. The steam boiler water treatment system for multiple water sources according to claim 1, characterized in that: The water source temperature regulating device comprises a heat exchanger (1) and a cooler (10).

3. The steam boiler water treatment system for multiple water sources according to claim 2, characterized in that: When the water source is seawater, the water source temperature regulating device is a heat exchanger (1), and seawater enters from the cold fluid inlet of the heat exchanger (1), and the cold fluid of the heat exchanger (1) is connected to the solid particle filtering mechanism after exiting; when the water source is well water, the water source temperature regulating device is a cooler (10), and the well water enters from the hot fluid inlet of the cooler (10), and the hot fluid of the cooler (10) is connected to the solid particle filtering mechanism after exiting, and the cooling medium of the cooler (10) is seawater.

4. The steam boiler water treatment system for multiple water sources according to claim 1, characterized in that: The solid particle filtering mechanism comprises a sedimentation tank (2) and a dual-medium filter (3) which are connected in sequence according to the direction of water flow, and the outlet of the dual-medium filter (3) is connected to an inorganic ultrafiltration membrane unit.

5. The steam boiler water treatment system for multiple water sources according to claim 1, characterized in that: The water treatment mechanism is a combination of a reverse osmosis unit and an electrodialysis device or a combination of a reverse osmosis unit and a sodium ion exchanger.

6. The steam boiler water treatment system for multiple water sources according to claim 5, characterized in that: When the water source is seawater, the water quality treatment mechanism comprises a primary seawater reverse osmosis unit (5), a secondary seawater reverse osmosis unit (6), a tertiary seawater reverse osmosis unit (7) and an EDI device (8) which are sequentially connected according to the direction of water flow.

7. The steam boiler water treatment system for multiple water sources according to claim 6, characterized in that: The concentrated water of the primary seawater reverse osmosis unit (5) is directly discharged into the sea, the concentrated water outlet of the secondary seawater reverse osmosis unit (6) is connected to the inorganic ultrafiltration membrane unit (4), and the concentrated water outlet of the tertiary seawater reverse osmosis unit (7) is connected to the primary seawater reverse osmosis unit (5).

8. The steam boiler water treatment system for multiple water sources according to claim 5, characterized in that: When the water source is well water, the water quality treatment mechanism comprises a primary well water reverse osmosis unit (11), a primary sodium ion exchanger (12) and a secondary sodium ion exchanger (13) which are sequentially connected according to the direction of water flow.

9. The steam boiler water treatment system for multiple water sources according to claim 1, characterized in that: When the water source is well water, the well water is treated by the thermal deaerator (9) and then connected to the hot fluid inlet of the heat exchanger (1).

Images