Oily sewage treatment device

Abstract

The utility model relates to the technical field of oily sewage treatment, and discloses an oily sewage treatment device which comprises a sewage treatment tank, a water inlet pipeline, a gas outlet pipeline, a water outlet pipeline and a heat tracing assembly. The water inlet pipeline is communicated with the upper part of the sewage treatment tank and a sewage source; the gas outlet pipeline is communicated with the upper part of the sewage treatment tank and an external discharge medium; the water outlet pipeline is communicated with the lower part of the sewage treatment tank and an external storage medium; the heat tracing assembly is installed in the sewage treatment tank and used for heating the oily sewage, so that oil in the oily sewage is evaporated to form oil gas, and the oil gas is output through the gas outlet pipeline. According to the oily sewage treatment device disclosed by the utility model, the problems of harm to human health and environmental pollution caused by a large amount of organic gas when oily sewage is directly discharged to an external discharge medium are avoided, and meanwhile, the difficulty of subsequent sewage treatment is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oily sewage treatment, in particular to an oily sewage treatment device. Background Art

[0002] In the petrochemical industry, when products containing free water enter the oil tank, a certain amount of water will be deposited at the bottom of the tank. Before entering the next process, the water at the bottom of the tank must be removed to ensure normal production and thus ensure qualified product quality.

[0003] In the existing technology, the general dehydration operation method is to use a dehydration tank or a shower to remove the water from the bottom of the storage tank, then discharge it into a collection tank, and then transport it to the sewage treatment plant through underground sewage pipes. The discharged water not only contains a certain amount of oil that has not been completely separated, but also has a large amount of odor. Specifically, this dehydration operation method has the following disadvantages:

[0004] A large amount of organic gas contained in the waste oil water will volatilize into the air, polluting the air. Sometimes, when the hydrogen sulfide content in the waste oil water is high, it will threaten the life safety of the operators.

[0005] Once underground sewage pipes leak, they will pollute the soil and groundwater, causing irreparable pollution in the short term;

[0006] When the operator makes a mistake in the dehydration operation, a large amount of medium stored in the tank will leak out of the tank, polluting the environment and causing huge safety hazards;

[0007] The oil content in the removed water is high, which makes subsequent sewage treatment more difficult. Utility Model Content

[0008] In order to solve the shortcomings of the existing technology, the utility model provides an oily wastewater treatment device to avoid the problem of a large amount of organic gas being present when the oily wastewater is directly discharged into an external discharge medium, causing harm to human health and polluting the environment, while also reducing the difficulty of subsequent wastewater treatment.

[0009] The technical effects to be achieved by the present invention are achieved through the following technical solutions:

[0010] The utility model provides an oily wastewater treatment device, comprising:

[0011] sewage treatment tanks;

[0012] a water inlet pipe connected to the upper portion of the sewage treatment tank and a sewage source;

[0013] an air outlet pipe connected to the upper portion of the sewage treatment tank and an external discharge medium;

[0014] an outlet pipe connected to the lower portion of the sewage treatment tank and an external storage medium; and

[0015] The heating component is installed inside the sewage treatment tank and is used to heat the oily sewage so that the oil in the oily sewage evaporates to form oil gas and outputs it through the gas outlet pipeline.

[0016] In some implementations, the heating assembly includes a heating coil, an input control valve, and an output control valve, wherein the input end of the heating coil is connected to an external heating medium source through the input control valve, and the output end of the heating coil is connected to an external open space through the output control valve.

[0017] In this implementation, by controlling the switch of the input control valve, an external heating medium source is allowed to enter the heating coil in the sewage treatment tank, thereby heating and insulating the oily sewage, causing the oil in the oily sewage to evaporate into oil gas and be discharged from the gas outlet pipe, thereby achieving the effect of sewage degreasing.

[0018] In some implementations, the source of heating medium is steam.

[0019] In some implementations, the temperature of the steam is any value between 140°C and 170°C.

[0020] In some implementations, the output end of the heating coil is further connected to a steam trap.

[0021] In this implementation, the steam trap can automatically remove non-condensable gases such as air, thereby preventing the occurrence of steam lock and ensuring uniform heating of the heating coil.

[0022] In some implementations, it also includes a control module, a liquid level detection component connected to the sewage treatment tank, and a shut-off valve connected to the water inlet pipe, the input end of the control module is connected to the liquid level detection component, and the output end is connected to the shut-off valve.

[0023] In this implementation, the liquid level detection component is used to sense the liquid level in the sewage treatment tank and feed the liquid level value back to the control module. The control module controls the switch of the shut-off valve according to the liquid level value to prevent the liquid level from being too high and affecting the normal operation of the oily sewage treatment device.

[0024] In some implementations, the air outlet pipeline is connected to an air outlet control valve, and the air outlet pipeline extends downward at a preset angle.

[0025] In some implementations, a boosting component is further included, which includes a boosting medium input pipeline and a boosting control valve. The first end of the boosting medium input pipeline is connected to the sewage treatment tank, and the second end is connected to an external boosting medium source through the boosting control valve.

[0026] In this implementation, the pressurized medium source enters the interior of the sewage treatment tank through the pressurized medium input pipeline to supplement the pressure in the sewage treatment tank.

[0027] In some implementations, the source of pressurized medium is nitrogen.

[0028] In some implementations, an output pump is further included, and the output pump is connected to the water outlet pipeline.

[0029] In this implementation, the output pump drives the wastewater after oil removal to be transported to an external storage medium through an outlet pipe.

[0030] In summary, the present invention has at least the following advantages:

[0031] The oily wastewater treatment device provided by the utility model is configured such that when the oily wastewater enters a wastewater treatment tank, a heating component is installed within the tank to heat the oily wastewater, thereby increasing its temperature. This causes the oil in the wastewater to gradually evaporate, forming oil gas. The oil gas is then discharged to an external flare network through an outlet pipe connected to the upper portion of the wastewater treatment tank. The oil-free wastewater is then discharged to an external discharge medium through an outlet pipe. This prevents the generation of large amounts of organic gas when the oily wastewater is directly discharged into an external discharge medium, which could harm human health and pollute the environment. It also reduces the difficulty of subsequent wastewater treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of the oily wastewater treatment device of Example 1;

[0033] Figure 2 This is a schematic structural diagram of the oily wastewater treatment device of Example 2;

[0034] Figure 3 for Figure 2 The schematic diagram of the structure of the liquid level detection component and the shut-off valve shown;

[0035] Figure 4 This is a schematic structural diagram of the oily wastewater treatment device of Example 3.

[0036] Markings in the figure:

[0037] 1. Sewage treatment tank; 110. Liquid level detection component;

[0038] 2. Water inlet pipe; 21. Shut-off valve;

[0039] 3. Outlet pipe; 31. Outlet control valve;

[0040] 4. Water outlet pipe; 41. Output pump;

[0041] 5. Heating assembly; 51. Heating coil; 52. Input control valve; 53. Output control valve; 54. Steam trap;

[0042] 6. Control module;

[0043] 7. Booster assembly; 71. Booster medium input pipeline; 72. Booster control valve;

[0044] 8. Sewage source;

[0045] 9. External discharge medium;

[0046] 10. External storage medium;

[0047] 11. Heating medium source;

[0048] 12. Open space;

[0049] 13. Source of pressurized medium. DETAILED DESCRIPTION

[0050] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0051] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0052] Example 1:

[0053] Please see the attached Figure 1 The oily wastewater treatment device of the present invention includes a wastewater treatment tank 1, a water inlet pipeline 2, an air outlet pipeline 3, a water outlet pipeline 4 and a heating component 5.

[0054] Among them, see Figure 1 , Figure 1The diagram illustrates the structural relationship between the sewage treatment tank 1, water inlet pipe 2, air outlet pipe 3, water outlet pipe 4, and heating assembly 5 in an embodiment of the present invention. Specifically, the water inlet pipe 2 connects to the upper portion of the sewage treatment tank 1 and the sewage source 8; the air outlet pipe 3 connects to the upper portion of the sewage treatment tank 1 and the external discharge medium 9; the water outlet pipe 4 connects to the lower portion of the sewage treatment tank 1 and the external storage medium 10; and the heating assembly 5 is installed inside the sewage treatment tank 1 and is used to heat the oily wastewater, causing the oil in the oily wastewater to evaporate, forming oil vapor, which is then discharged through the air outlet pipe 3.

[0055] In this embodiment, oily wastewater from a wastewater source 8 enters a wastewater treatment tank 1 through an inlet pipe 2. A heating assembly 5 heats the oily wastewater within the wastewater treatment tank 1. By increasing the heating temperature of the heating assembly 5, the oil in the oily wastewater gradually evaporates to form oil gas, which is then discharged to an external discharge medium through an outlet pipe 3. In this embodiment, the external discharge medium is a flare network, allowing the discharged combustible gas to be safely and reliably burned in the flare facility and meet environmental emission requirements. The wastewater, after the oil and gas have been removed, is discharged to an external discharge medium 9 through an outlet pipe 4. The external discharge medium 9 can be a C5 separation oil-water regulating tank within a wastewater pretreatment station, thereby ensuring the safe discharge of the wastewater. It is understood that the outlet pipe 3 is connected to the upper portion of the wastewater treatment tank 1, which is more conducive to the discharge of oil and gas. The outlet pipe 4 is connected to the lower portion of the wastewater treatment tank 1 to prevent wastewater from accumulating within the wastewater treatment tank 1, thereby ensuring the reliability of the oily wastewater treatment device.

[0056] In the aforementioned oily wastewater treatment device, oily wastewater enters wastewater treatment tank 1. A heating assembly 5 is installed within tank 1 to heat the oily wastewater, raising its temperature. This causes the oil in the wastewater to gradually evaporate, forming oil vapor. This vapor is then discharged to an external flare network via an outlet pipe 3 connected to the upper portion of tank 1. The deoiled wastewater is then discharged to an external discharge medium via an outlet pipe 4. This prevents the generation of large amounts of organic gas when the oily wastewater is directly discharged into an external discharge medium, which could pose a threat to human health and pollute the environment. It also reduces the difficulty of subsequent wastewater treatment.

[0057] It can be understood that since the oily wastewater is heated by the heating component 5, the oil in the oily wastewater evaporates, and the wastewater with the oil removed can be discharged into the same pipe network as ordinary wastewater, thereby reducing wastewater treatment costs and making the treatment process simpler and more convenient. If the oily wastewater is discharged directly through the same pipe network as ordinary wastewater, it will increase the cost of wastewater treatment and cause certain damage to the environment. For example, the oily wastewater pipe of a certain factory is connected to the rainwater pipe, resulting in rainwater within fifteen minutes after rain cannot be discharged directly and must be treated as oily wastewater, thus incurring additional wastewater treatment costs. If the pipe network leaks, it will pollute the soil and produce a strong odor. In this embodiment, the oily wastewater is deoiled and can be discharged together with the rainwater, thereby reducing wastewater treatment costs and avoiding the problem of soil pollution caused by pipe network leakage.

[0058] Example 2:

[0059] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the oily wastewater treatment device of the utility model. Figures 2 and 3 .

[0060] Among them, see Figure 2 , Figure 2 The diagram illustrates the structural relationship between the heating coil 51, input control valve 52, and output control valve 53 in an embodiment of the present invention. Specifically, the heating assembly 5 includes the heating coil 51, the input control valve 52, and the output control valve 53. The input end of the heating coil 51 is connected to the external heating medium source 11 through the input control valve 52, and the output end of the heating coil 51 is connected to the external open space 12 through the output control valve 53.

[0061] In this embodiment, the input control valve 52 is controlled to allow an external heating medium source 11 to enter the heating coil 51 within the wastewater treatment tank 1, thereby heating and insulating the oily wastewater. This causes the oil in the oily wastewater to evaporate into oil vapor and be discharged through the gas outlet pipe 3, thereby achieving the effect of degreasing the wastewater. The output control valve 53 is controlled to allow the heating medium source 11 within the heating coil 51 to be discharged to the external open space 12. The heating medium source 11 is steam, which avoids the problem of steam gradually cooling within the heating coil 51 as the heating time increases. Used steam is discharged to the external open space 12 through the output end of the heating coil 51, allowing fresh high-temperature steam to be input to the input end of the heating coil 51 to ensure that the heating coil 51 is in the optimal heating state, thereby improving the oil removal efficiency of the oily wastewater.

[0062] In some preferred embodiments, the steam temperature is between 140°C and 170°C, so that the oil in the oily wastewater evaporates more quickly into oil gas, which is then discharged through the gas outlet pipe 3. It is understood that increasing the steam temperature can accelerate the vaporization of the oil in the oily wastewater, thereby reducing the oil content in the oily wastewater and ensuring that the oily wastewater meets discharge standards.

[0063] In some preferred embodiments, the output end of the heating coil 51 is further connected to a steam trap 54. The steam trap 54 automatically removes non-condensable gases, such as air, to prevent steam lock and ensure uniform heating of the heating coil 51. It also automatically removes condensed steam to prevent water hammer in the heating coil 51 and fully utilizes the latent heat of steam to improve the operating efficiency of the heating coil 51 and ensure its safe operation.

[0064] In some preferred embodiments, see Figure 3 , Figure 3 The diagram illustrates the structural relationship between the liquid level detection component 110 and the shut-off valve 21 in an embodiment of the present invention. Specifically, it also includes a control module 6, a liquid level detection component 110 connected to the sewage treatment tank 1, and a shut-off valve 21 connected to the water inlet pipe 2. The input end of the control module 6 is connected to the liquid level detection component 110, and the output end is connected to the shut-off valve 21. The liquid level detection component 110 is used to sense the liquid level in the sewage treatment tank 1 and feed the liquid level value back to the control module 6. The control module 6 controls the switch of the shut-off valve 21 according to the liquid level value to prevent the liquid level from being too high and affecting the normal operation of the oily sewage treatment device. Preferably, the liquid level detection component 110 can be a liquid level gauge, which can display the sewage level in the sewage treatment tank 1 remotely and / or on-site.

[0065] Furthermore, the first and second liquid level alarm values can be preset to remind the operator to close the shut-off valve 21 or to control the shut-off valve 21 to close automatically. Specifically, when the liquid level detection component 110 senses that the liquid level in the sewage treatment tank 1 has reached 80%, an alarm is issued to remind the operator to close the shut-off valve 21. When the liquid level detection component 110 senses that the liquid level in the sewage treatment tank 1 has reached 90%, the shut-off valve 21 is controlled to close automatically.

[0066] In some more preferred embodiments, the outlet pipe 3 is connected to an outlet control valve 31, and the outlet pipe 3 extends downward at a preset angle. This avoids the problem of oil and gas backflow when being discharged from the outlet pipe 3, reduces discharge resistance, and thus ensures normal discharge of oil and gas.

[0067] Example 3:

[0068] The difference between this embodiment and embodiment 2 is that this embodiment further optimizes the structure of the oily wastewater treatment device of the utility model. Figure 4 .

[0069] Among them, see Figure 4 , Figure 4 The diagram illustrates the structural relationship between the pressurized medium input pipeline 71, the pressure control valve 72, and the sewage treatment tank 1 in an embodiment of the present invention. Specifically, the oily sewage treatment device further includes a pressure boosting assembly 7, which includes a pressurized medium input pipeline 71 and a pressure control valve 72. The first end of the pressurized medium input pipeline 71 is connected to the sewage treatment tank 1, and the second end is connected to an external pressurized medium source 13 through the pressure control valve 72.

[0070] In this embodiment, the pressurizing medium source 13 enters the interior of the sewage treatment tank 1 through the pressurizing medium input pipeline 71 to replenish the pressure within the sewage treatment tank 1. The pressurizing medium source 13 is nitrogen, which allows the oily wastewater from the sewage source 8 to enter the interior of the sewage treatment tank 1 through the water inlet pipeline 2. When the pressure in the sewage treatment tank 1 reaches the target value, the boost control valve 72 is closed to prevent further nitrogen from entering the sewage treatment tank 1, thereby ensuring the reliability of the boosting assembly 7.

[0071] In some preferred embodiments, the oily wastewater treatment device further includes an output pump 41 connected to the outlet pipe 4 to drive the wastewater after oil removal to be transported to the external storage medium 10 through the outlet pipe 4, thereby ensuring the reliability of the oily wastewater treatment device.

[0072] In the oily wastewater treatment device of the present invention, oily wastewater enters a wastewater treatment tank 1. A heating assembly 5 is provided within the wastewater treatment tank 1 to heat the oily wastewater, thereby increasing its temperature. This causes the oil in the oily wastewater to gradually evaporate, forming oil gas. The oil gas is then discharged to an external flare network via an outlet pipe 3 connected to the upper portion of the wastewater treatment tank 1. The oil-free wastewater is then discharged to an external discharge medium via an outlet pipe 4. This prevents the generation of large amounts of organic gas when the oily wastewater is directly discharged into an external discharge medium, which could harm human health and pollute the environment. This also reduces the difficulty of subsequent wastewater treatment.

[0073] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0074] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0075] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0076] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0077] Although the present invention has been described with reference to the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included within the spirit and scope of the appended claims.

Claims

1. An oily wastewater treatment device, characterized in that: include: Sewage treatment tank (1); A water inlet pipe (2) connected to the upper portion of the sewage treatment tank (1) and a sewage source (8); An air outlet pipe (3) connected to the upper portion of the sewage treatment tank (1) and an external discharge medium (9); an outlet pipe (4) connected to the lower portion of the sewage treatment tank (1) and an external storage medium (10); and A heating component (5) is installed inside the sewage treatment tank (1) and is used to heat the oily sewage so that the oil in the oily sewage evaporates to form oil gas and is output through the gas outlet pipeline (3).

2. The oily wastewater treatment device according to claim 1, characterized in that: The heating assembly (5) comprises a heating coil (51), an input control valve (52) and an output control valve (53), wherein the input end of the heating coil (51) is connected to an external heating medium source (11) via the input control valve (52), and the output end of the heating coil (51) is connected to an external open space (12) via the output control valve (53).

3. The oily wastewater treatment device according to claim 2, characterized in that: The heating medium source (11) is steam.

4. The oily wastewater treatment device according to claim 3, characterized in that: The temperature of the steam is any value between 140°C and 170°C.

5. The oily wastewater treatment device according to claim 3, characterized in that: The output end of the heating coil (51) is also connected to a steam trap (54).

6. The oily wastewater treatment device according to claim 1, characterized in that: It also includes a control module (6), a liquid level detection component (110) connected to the sewage treatment tank (1), and a shut-off valve (21) connected to the water inlet pipeline (2); the input end of the control module (6) is connected to the liquid level detection component (110), and the output end is connected to the shut-off valve (21).

7. The oily wastewater treatment device according to claim 1, characterized in that: The air outlet pipeline (3) is connected to an air outlet control valve (31), and the air outlet pipeline (3) extends downwardly at a preset angle.

8. The oily wastewater treatment device according to claim 1, characterized in that: The system further comprises a pressurizing component (7), wherein the pressurizing component (7) comprises a pressurizing medium input pipeline (71) and a pressurizing control valve (72), wherein a first end of the pressurizing medium input pipeline (71) is connected to the sewage treatment tank (1), and a second end thereof is connected to an external pressurizing medium source (13) via the pressurizing control valve (72).

9. The oily wastewater treatment device according to claim 8, characterized in that: The pressurized medium source (13) is nitrogen.

10. The oily wastewater treatment device according to claim 1, characterized in that: It also includes an output pump (41), and the output pump (41) is connected to the water outlet pipeline (4).

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