Oily sewage tank with oil-water separation function

Abstract

The utility model relates to the technical field of oily sewage treatment equipment, in particular to an oily sewage tank with an oil-water separation function. Comprising a tank body, and an oil-water separation assembly and a heat tracing assembly are arranged in the tank body; the oil-water separation assembly comprises a guide rod, an oil collecting disc, an oil guide hose and an oil discharge port formed in the top of the tank body; the oil collecting disc comprises a floating body part and a connecting part; a cavity is formed in the floating body part; the connecting part is provided with a guide hole, and the guide rod penetrates through the guide hole; an oil receiving hole extending downwards is formed in the center of the upper surface of the connecting part, and the oil receiving hole is fixedly communicated with the oil discharge outlet through an oil guide hose; a horn hole is formed in the center of the lower surface of the connecting part, and a narrow opening in the top end of the horn hole communicates with the oil collecting hole. The device is stable in operation and easy to repair and maintain, can stably operate for a long time in the petrochemical production process, and meets the safety requirement of the chemical production process.

Description

Technical Field

[0001] This utility model relates to the technical field of oily wastewater treatment equipment, specifically to an oily wastewater tank with oil-water separation function. Background Technology

[0002] Oil refining, petrochemical, coking, and steel industries generate oily wastewater at multiple stages of production.

[0003] In existing technologies, the collection and regulation of oily wastewater is carried out using closed storage tanks. This approach has two advantages: firstly, it meets environmental protection requirements and reduces the pollution of the atmosphere by oily wastewater; secondly, it can improve the resistance to the impact of the incoming flow of oily wastewater and play a buffering role.

[0004] After oily wastewater is left to settle in the tank, it will separate into layers due to the density difference between water and oil, with oil on top and water at the bottom. Since the oily wastewater outlet is located at the bottom of the tank, heating is required before discharging the wastewater to ensure even mixing of oil and water. However, a significant amount of oil remains in the tank. When the residual oil in the tank reaches a certain level, it poses a safety hazard, necessitating timely inspection and cleaning. Furthermore, the high oil content of the untreated oily wastewater discharged from the tank will negatively impact treatment efficiency and quality if directly introduced into subsequent processes. Utility Model Content

[0005] This utility model provides an oily wastewater tank with oil-water separation function. Its purpose is to solve the technical problems in the prior art where oily wastewater tanks pose safety hazards due to a large amount of oil residue in the tank body, and the high oil content of the oily wastewater discharged from the tank leads to low efficiency and quality of subsequent process flow.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] This utility model provides an oily wastewater tank with oil-water separation function, comprising: a tank body, wherein an oil-water separation component and a heat tracing component are disposed inside the tank body;

[0008] The oil-water separation assembly includes a guide rod, an oil collection tray, an oil guiding hose, and an oil drain port located at the top of the tank. The guide rod is vertically positioned at the center of the tank. The side view of the oil collection tray is U-shaped, and it includes floats on both sides and a connecting portion between the two floats. Each float has an internal cavity. The connecting portion has a through guide hole, through which the guide rod passes. The oil collection tray can slide freely vertically on the guide rod as the oily wastewater level in the tank changes.

[0009] An oil collection hole extending downwards is provided at the center of the upper surface of the connecting part, and the oil collection hole is fixedly connected to the oil drain port through an oil guide hose; a flared hole is provided at the center of the lower surface of the connecting part, and the narrow opening at the top of the flared hole is connected to the oil collection hole.

[0010] Furthermore, the top of the tank is provided with an oily wastewater inlet, a flash vapor outlet, a vent, a manhole, and a pressure gauge port. The upper and lower middle parts of the side wall of the tank are respectively provided with a liquid level gauge port, and the bottom of the tank is provided with an oily wastewater outlet.

[0011] Furthermore, the tank body is equipped with an inclined ladder inside, and a support is provided at the bottom of the tank body.

[0012] Furthermore, a pressure gauge is sealed and installed on the pressure gauge port, two level gauge ports are used to install level gauges, a valve one is provided on the flash vapor outlet, a valve two is provided on the vent port, and a manhole cover is provided on the manhole.

[0013] Furthermore, the lower surface of the connecting part is provided with a plurality of guide grooves, all of which are connected to the horn hole.

[0014] Furthermore, a density sensor is installed on the oil collection hole.

[0015] Furthermore, the oil guide hose is arranged around the guide rod.

[0016] Furthermore, the heat tracing assembly includes a heat tracing steam inlet, a heating coil, and a heat tracing condensate outlet. The heat tracing steam inlet and the heat tracing condensate outlet are both located at the lower part of the same end wall of the tank body. The heating coil is arranged in a serpentine manner inside the tank body. One end of the heating coil is connected to the heat tracing steam inlet, and the other end is connected to the heat tracing condensate outlet.

[0017] The beneficial effects achieved by this utility model are as follows:

[0018] This invention employs a technical measure of installing an oil-water separation component inside the tank. Utilizing the stratification characteristic of water and oil due to their density difference, it can effectively separate the oil from the upper layer of oily wastewater stored in the tank, effectively reducing the oil content of the wastewater. This not only alleviates the technical problem of safety hazards caused by large amounts of residual oil in oily wastewater tanks, but also effectively simplifies the process flow for subsequent treatment of oily wastewater, thereby significantly improving the treatment efficiency and quality of oily wastewater and effectively reducing the treatment cost of oily wastewater in the entire process.

[0019] The oil collection tray of this utility model is made of lightweight material. Its side view projection shape is an inverted U-shape, with floating parts on both sides and a connecting part in the middle. The floating parts are hollow structures, which can provide greater buoyancy to offset the sum of the weight of the oil collection tray itself and the downward force exerted on the oil collection tray by the oil guide hose and other structures. This ensures that no matter how the oil collection tray floats up and down, its flared hole is always located in the oil layer above the oily wastewater, which is convenient for oil pump extraction.

[0020] The oil collection tray of this utility model has a flared hole on the lower surface of the connecting part that communicates with the oil collection hole. This hole can collect sludge oil to a certain extent and make it easier to form a stable vacuum chamber, thereby improving the pumping efficiency of the oil pump.

[0021] The lower surface of the connecting part of this utility model is provided with several guide grooves that communicate with the horn hole. These guide grooves can guide the sludge oil to flow towards the horn hole, forming an orderly guide path, which can effectively capture a wider range of sludge oil and improve the oil absorption speed.

[0022] This invention employs a technical measure of installing a heat tracing component at the bottom of the tank. Before discharging oily wastewater, the oily wastewater is heated by the heat tracing component to ensure uniform mixing. After the oil and water are evenly mixed, the wastewater is discharged. This design further reduces the technical problem of safety hazards caused by a large amount of oil remaining in the tank, thereby effectively improving the safety of storing oily wastewater in the tank.

[0023] This invention is stable in operation and easy to maintain. It can operate stably for a long time in the petrochemical production process and meets the safety requirements of the chemical production process. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a cross-sectional structural schematic diagram (front view) of this utility model.

[0026] Figure 2 This is a top view (partial cross-sectional view) of the structure of this utility model.

[0027] Figure 3 This is a schematic diagram of the left-side structure of this utility model.

[0028] Figure 4 This is a schematic diagram of the oil-water separation component of this utility model.

[0029] Figure 5 yes Figure 4 A schematic diagram of the structure from the perspective of A in the middle.

[0030] Figure 6 yes Figure 5 Schematic diagram of the structure from the perspective of B.

[0031] Figure 7 yes Figure 5 Cross-sectional view of the middle CC section.

[0032] Figure 8 yes Figure 5 Cross-sectional view of DD.

[0033] Figure 9 yes Figure 5 Cross-sectional view of the EE.

[0034] Figure 10 yes Figure 9 Schematic diagram of the structure from the perspective of the F-axis.

[0035] In the diagram, 1. Tank body; 1-1. Oily wastewater inlet; 1-2. Flash steam outlet; 1-3. Vent; 1-4. Manhole; 1-5. Pressure gauge port; 1-6. Level gauge port; 1-7. Oily wastewater outlet; 1-8. Inclined ladder; 2. Oil-water separation assembly; 2-1. Guide rod; 2-2. Oil collection tray; 2-2-1. Float part; 2-2-2. Connecting part; 2-2-3. Guide hole; 2-2-4. Oil collection hole; 2-2-5. Horn hole; 2-2-6. Cavity; 2-2-7. Flow guide channel; 2-3. Oil guide hose; 2-4. Oil outlet; 2-5. Density sensor; 3. Heating assembly; 3-1. Heating steam inlet; 3-2. Heating coil; 3-3. Heating condensate outlet; 4. Support. Detailed Implementation

[0036] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0037] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] like Figures 1-10 As shown in the attached drawings, this application discloses an oily wastewater tank with oil-water separation function. It includes a tank body 1, with a support 4 at the bottom; an oily wastewater inlet 1-1 at the top of the tank body 1, which is fixedly connected to an oily wastewater inlet pipeline; a flash vapor outlet 1-2, a vent 1-3, a manhole 1-4, and a pressure gauge port 1-5 at the top of the tank body 1; a level gauge port 1-6 at the upper and lower middle parts of the side wall of the tank body 1; an oily wastewater outlet 1-7 at the bottom of the tank body 1, which is fixedly connected to an oily wastewater outlet pipeline; an inclined ladder 1-8 inside the tank body 1, which facilitates personnel entering and exiting the tank body 1 through the manhole 1-4 for maintenance work; and an oil-water separation assembly 2 inside the tank body 1.

[0040] A pressure gauge is sealed and installed on the pressure gauge port 1-5 to detect the internal pressure of the tank 1; two level gauge ports 1-6 are used to install level gauges to detect the liquid level in the tank 1; a valve is installed on the flash vapor outlet 1-2, the main function of which is to discharge the vapor generated by flash vapor from the tank 1 to prevent excessive pressure; a valve is installed on the vent port 1-3, which can be opened to vent the gas in the tank 1 when maintenance, inspection or cleaning is required, to ensure the safety of the personnel; a manhole cover is installed on the manhole 1-4 to seal the tank 1 when not in use.

[0041] Furthermore, both the pressure gauge and valve 1 are connected to the control module; when the pressure inside tank 1 is too high, the control module controls valve 1 to open and promptly discharge flash steam to prevent safety accidents.

[0042] The specific models of pressure gauges, level gauges, and valves mentioned in this article should be determined based on the actual situation of each factory. Since these can be determined through experience, they will not be elaborated upon here.

[0043] The oil-water separation assembly 2 includes a guide rod 2-1, an oil collection tray 2-2, an oil guide hose 2-3, and an oil outlet 2-4 located at the top of the tank body 1. The guide rod 2-1 is vertically positioned at the center inside the tank body 1. The oil collection tray 2-2 has a rectangular shape when viewed from above (e.g., ...). Figure 5 As shown), the side view projection shape of the oil receiving pan 2-2 is an inverted U-shape (as shown). Figure 6 As shown in the diagram, the oil collection tray 2-2 includes float parts 2-2-1 on both sides and a connecting part 2-2-2 between the two float parts 2-2-1; each of the two float parts 2-2-1 has a cavity 2-2-6 inside to increase buoyancy; the connecting part 2-2-2 has a guide hole 2-2-3 that runs vertically through it, and the guide rod 2-1 passes through the guide hole 2-2-3. The inner diameter of the guide hole 2-2-3 2-2-1 of the oil collection tray 2-2 is consistent with the guide rod 2-2-3. The outer diameters of the guide rods 2-1 are matched; because the oil collection tray 2-2 is made of lightweight materials (such as plastic, foam, etc., and various openings of the oil collection tray 2-2 need to be structurally reinforced, which is a conventional technical means and will not be described in detail here) and the structure is specially designed, the oil collection tray 2-2 can slide freely vertically on the guide rod 2-1 as the oily wastewater level in the tank 1 changes; and during this process, the trumpet hole 2-2-5 is always located in the oil layer above the oily wastewater, which is convenient for collection.

[0044] In addition, the design of the dimensions of each part of the oil collection tray 2-2 and the selection of materials need to be combined with the actual situation of each factory so that the oil collection tray 2-2 can provide suitable buoyancy. Since this can be obtained with only experience and experiments, it will not be elaborated on here.

[0045] An oil collection hole 2-2-4 extending downward is provided at the center of the upper surface of the connecting part 2-2-2. The oil collection hole 2-2-4 is fixedly connected to the oil outlet 2-4 through the oil guide hose 2-3. The oil outlet 2-4 is fixedly connected to the liquid inlet end of the oil pump through a pipeline. A flared hole 2-2-5 is provided at the center of the lower surface of the connecting part 2-2-2. The narrow opening at the top of the flared hole 2-2-5 is connected to the oil collection hole 2-2-4. The flared hole 2-2-5 is provided to facilitate the expansion of the extraction range and to facilitate the formation of a stable vacuum chamber 2-2-6. This design allows the oil pump to extract the oil from the upper layer of oily wastewater inside tank 1 during operation, effectively reducing the oil content of the wastewater. This not only alleviates the technical problem of safety hazards caused by large amounts of oil remaining in tank 1, but also simplifies the process of processing oily wastewater for subsequent treatment, thereby significantly improving the treatment efficiency and quality of oily wastewater and effectively reducing the treatment cost of oily wastewater in the entire process.

[0046] Furthermore, the lower surface of the connecting part 2-2-2 is provided with a plurality of guide grooves 2-2-7, all of which are connected to the horn hole 2-2-5. The guide grooves 2-2-7 are used to form an orderly guide path, which can effectively capture a wider range of sludge and oil.

[0047] Furthermore, a density sensor 2-5 is installed on the oil collection hole 2-2-4. The density sensor 2-5 is used to detect the density of the liquid entering the oil guide hose 2-3 through the oil collection hole 2-2-4. The density sensor 2-5 is connected to the control module. When the oil pump is working, the density sensor 2-5 constantly detects the density of the liquid in the oil guide hose 2-3 and sends information to the control module. When the detected density is lower than the threshold, it means that the oil layer may have been evacuated, and at this time the control module controls the oil pump to shut down. The density sensor 2-5 can be a resonant liquid density sensor 2-5, a vibrating tube liquid density sensor 2-5, or an ultrasonic density sensor 2-5, etc. The specific model is selected according to the actual situation, and will not be elaborated further in this article.

[0048] Furthermore, the oil guide hose 2-3 is arranged around the guide rod 2-1.

[0049] The tank body 1 is also equipped with a heat tracing assembly 3, which includes a steam inlet 3-1, a heating coil 3-2, and a condensate outlet 3-3. The steam inlet 3-1 and the condensate outlet 3-3 are both located at the lower part of the same end wall of the tank body 1. The heating coil 3-2 is arranged in a serpentine manner inside the tank body 1. One end of the heating coil 3-2 is connected to the steam inlet 3-1, and the other end is connected to the condensate outlet 3-3. The steam inlet 3-1 is fixedly connected to a steam pipeline, and the condensate outlet 3-3 is fixedly connected to a condensate pipeline. With this design, the heat tracing assembly 3 is turned on to heat the oily wastewater before discharging it, so that the oil and water are evenly mixed. After the oil and water are evenly mixed, the oily wastewater is discharged. This design further reduces the safety hazard caused by a large amount of oil remaining in the tank body 1, thereby effectively improving the safety of storing oily wastewater in the tank.

[0050] The water pressure test pressure of the heating coil 3-2 is 1.5MPa, the operating temperature is 250℃, and the heating area is 1㎡.

[0051] This utility model also includes a control module (not shown in the figure), which includes a PLC controller, several relays, a display screen, and several control buttons. The PLC controller is connected to each sensor, and the PLC controller controls the opening and closing of the oil pump and each valve through the relays. For those skilled in the art, it is obvious that the control module can be implemented through the functions described herein, without any creative effort required. Therefore, the specific structure of the control module will not be described in detail.

[0052] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An oily wastewater tank with oil-water separation function, characterized in that: It includes a tank (1), and the tank (1) is provided with an oil-water separation component (2) and a heat tracing component (3); The oil-water separation assembly (2) includes a guide rod (2-1), an oil collection tray (2-2), an oil guide hose (2-3), and an oil outlet (2-4) located at the top of the tank (1). The guide rod (2-1) is vertically positioned at the center of the tank (1). The side view projection shape of the oil collection tray (2-2) is an inverted U-shape. The oil collection tray (2-2) includes floats (2-2-1) on both sides and floats located on the two floats. The connecting part (2-2-2) between (2-2-1); the interior of each of the two floating parts (2-2-1) is provided with a cavity (2-2-6); the connecting part (2-2-2) is provided with a guide hole (2-2-3) that runs vertically through it, the guide rod (2-1) passes through the guide hole (2-2-3), and the oil collection plate (2-2) can slide freely vertically on the guide rod (2-1) as the oily sewage liquid level in the tank (1) changes; An oil collection hole (2-2-4) extending downward is provided at the center of the upper surface of the connecting part (2-2-2), and the oil collection hole (2-2-4) is connected to the oil drain port (2-4) through the oil guide hose (2-3); a flared hole (2-2-5) is provided at the center of the lower surface of the connecting part (2-2-2), and the narrow opening at the top of the flared hole (2-2-5) is connected to the oil collection hole (2-2-4).

2. The oily wastewater tank with oil-water separation function according to claim 1, characterized in that: The top of the tank (1) is provided with an oily wastewater inlet (1-1), a flash vapor outlet (1-2), a vent (1-3), a manhole (1-4), and a pressure gauge port (1-5). The upper and lower middle parts of the side wall of the tank (1) are respectively provided with a liquid level gauge port (1-6), and the bottom of the tank (1) is provided with an oily wastewater outlet (1-7).

3. An oily wastewater tank with oil-water separation function according to claim 1 or 2, characterized in that: The tank (1) is provided with an inclined ladder (1-8) inside, and a support (4) is provided at the bottom of the tank (1).

4. The oily wastewater tank with oil-water separation function according to claim 2, characterized in that: A pressure gauge is sealed and installed on the pressure gauge port (1-5), and two level gauge ports (1-6) are used to install level gauges. A valve is installed on the flash steam outlet (1-2), a valve is installed on the vent port (1-3), and a manhole cover is installed on the manhole (1-4).

5. The oily wastewater tank with oil-water separation function according to claim 1, characterized in that: The lower surface of the connecting part (2-2-2) is provided with a plurality of guide grooves (2-2-7), and the guide grooves (2-2-7) are all connected to the horn hole (2-2-5).

6. The oily wastewater tank with oil-water separation function according to claim 1, characterized in that: A density sensor (2-5) is installed on the oil collection hole (2-2-4).

7. The oily wastewater tank with oil-water separation function according to claim 1, characterized in that: The oil guide hose (2-3) is arranged around the guide rod (2-1).

8. The oily wastewater tank with oil-water separation function according to claim 1, characterized in that: The heat tracing assembly (3) includes a heat tracing steam inlet (3-1), a heating coil (3-2), and a heat tracing condensate outlet (3-3). The heat tracing steam inlet (3-1) and the heat tracing condensate outlet (3-3) are both located at the lower part of the same end wall of the tank body (1). The heating coil (3-2) is arranged in a serpentine manner inside the tank body (1). One end of the heating coil (3-2) is connected to the heat tracing steam inlet (3-1), and the other end is connected to the heat tracing condensate outlet (3-3).

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