Petrochemical wastewater efficient pretreatment device

Abstract

The utility model relates to the technical field of petrochemical wastewater treatment, in particular to an efficient pretreatment device for petrochemical wastewater. Comprising a horizontal tank body, a fixed weir plate is arranged in an inner cavity of the tank body, and the fixed weir plate is vertically arranged between a water phase outlet and an oil phase outlet; an inlet baffle plate, a gas rectifier, a gas phase passing screen mesh mist catcher, a down-flow pipe, a plurality of partition plates and two vortex prevention devices are respectively arranged in the inner cavity of the tank body; the plurality of partition plates are arranged between the plug at the rear end of the tank body and the water phase outlet at intervals; the heights of the plurality of partition plates are sequentially reduced from back to front, and are all higher than the height of the fixed weir plate; each partition plate comprises an upper part and a lower part, and a plurality of through holes are evenly formed in each lower part. According to the utility model, the efficient separation of gas, water and oil in petrochemical wastewater generated in the production process of a hydrogenation device is realized, and the operation stability and efficiency of a sewage treatment device are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to petrochemical wastewater treatment technical field, concretely relates to a petrochemical wastewater efficient pretreatment device. BACKGROUND

[0002] In the production process of petrochemical enterprises, a variety of key devices promote raw material conversion and product synthesis, and also inevitably produce wastewater containing complex chemical components. Among them, the hydrogenation device as an important part of petrochemical enterprise production device, in the process of treating heavy oil, hydrocarbon raw material hydrocracking to improve product quality, often produces petrochemical wastewater rich in gas, water, oil three-phase mixture.

[0003] This kind of petrochemical wastewater not only contains high concentration of suspended solids (such as catalyst particles, unreacted materials, etc.), emulsified oil and fat and dissolved organic matter and inorganic salt, but also may entrain gas components such as hydrogen and nitrogen, and its complexity poses a severe challenge to subsequent treatment. If the solid suspended matter and oil in this kind of petrochemical wastewater are not pretreated and directly sent to the sewage treatment plant, it will seriously affect the normal operation of the sewage treatment device, reduce the treatment efficiency, and even block the pipeline and equipment, increase the maintenance cost. And the treatment technology of this kind of petrochemical wastewater has obvious defects in resource utilization. Many by-products produced in the process, such as salts, acids and bases, cannot be effectively recycled and utilized, not only wasting valuable resources, but also increasing the difficulty and cost of subsequent treatment, which is largely due to the insufficient separation and recovery capacity of the existing technology for each component in petrochemical wastewater.

[0004] Therefore, the pretreatment step, the effective separation of gas, water and oil three-phase contained in petrochemical wastewater, is crucial for reducing the subsequent treatment load, separating and recycling the valuable components contained in petrochemical wastewater, and ensuring stable operation of the device. INVENTION CONTENTS

[0005] The utility model aims at the technical problems existing in the current petrochemical wastewater treatment technical field, and proposes an innovative pretreatment scheme. Specifically, the core purpose of the utility model is to solve the technical problems of low treatment efficiency, high cost and difficulty in effectively separating and recycling potential valuable components in petrochemical wastewater caused by directly entering the subsequent treatment process without sufficient pretreatment.

[0006] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0007] The utility model provides a kind of petrochemical wastewater efficient pretreatment device, including the tank body of horizontal, the upper portion of the rear end head of tank body is provided with import, the upper portion of the cylinder of tank body is provided with gas phase export, the lower portion of the cylinder of tank body is sequentially provided with water phase export and oil phase export from back to front between them;

[0008] The inner cavity of the tank body is provided with a fixed weir plate, which is vertically arranged between the water phase outlet and the oil phase outlet.

[0009] The inner cavity of the tank body is also provided with an import baffle, a gas rectifier, a gas phase screen mist eliminator, a downcomer, several partitions and two vortex preventers. The import baffle is arranged above the rear end of the cylinder of the tank body, and the gas rectifier is arranged at the middle position above the cylinder of the tank body. The gas phase screen mist eliminator is arranged on the gas phase outlet, which is fixedly connected to the downcomer downward. The several partitions are arranged between the rear end plug of the tank body and the water phase outlet. The two vortex preventers are arranged on the water phase outlet and the oil phase outlet, respectively.

[0010] The heights of the several partitions decrease from back to front, and are higher than the height of the fixed weir plate. The partitions each include an upper part and a lower part, and the lower part is uniformly provided with several through holes.

[0011] Further, the bottom of the cylinder of the tank body is provided with a bottom baffle.

[0012] Further, the import baffle has a double-arc structure, the upper arc thereof protrudes forward, and the lower arc thereof protrudes backward.

[0013] Further, the horizontal distance between the top end of the import baffle and the import is 20 cm.

[0014] Further, the partitions are five in total.

[0015] Further, the lower part of the partition includes a front plate and a rear plate, a cavity is arranged between the front plate and the rear plate, several through holes are arranged on the front plate and the rear plate, and the through holes on the front plate and the rear plate are staggered.

[0016] Further, the bottom of the cylinder of the tank body is provided with a saddle for supporting the tank body.

[0017] Further, a nameplate bracket is arranged at the center position of the rear end head of the tank body.

[0018] The utility model achieves the following beneficial effects:

[0019] The utility model discloses a technical means of optimization design and innovative combination to fixed weir plate, import baffle, gas rectifier, gas phase silk screen mist eliminator, downcomer, baffle and anti-vortex device etc. functional components are adopted, realize the efficient separation of the gas, water, oil three phases in the petrochemical wastewater generated in the production process of hydrogenation device, and the wastewater quality after pretreatment is greatly promoted, and then the subsequent sewage treatment plant processing flow can be significantly simplified, the petrochemical wastewater processing difficulty is reduced, the overall processing efficiency of sewage treatment device is promoted, and then the petrochemical wastewater processing cost is effectively reduced.

[0020] The utility model discloses a technical means of optimization design and innovative combination to fixed weir plate, import baffle, gas rectifier, gas phase silk screen mist eliminator, downcomer, baffle and anti-vortex device etc. functional components are adopted, realize the efficient separation of the gas, water, oil three phases in the petrochemical wastewater generated in the production process of hydrogenation device, and the wastewater quality after pretreatment is greatly promoted, and then the subsequent sewage treatment plant processing flow can be significantly simplified, the petrochemical wastewater processing difficulty is reduced, the overall processing efficiency of sewage treatment device is promoted, and then the petrochemical wastewater processing cost is effectively reduced.

[0021] The utility model discloses a technical means of optimization design and innovative combination to fixed weir plate, import baffle, gas rectifier, gas phase silk screen mist eliminator, downcomer, baffle and anti-vortex device etc. functional components are adopted, realize the efficient separation of the gas, water, oil three phases in the petrochemical wastewater generated in the production process of hydrogenation device, and the wastewater quality after pretreatment is greatly promoted, and then the subsequent sewage treatment plant processing flow can be significantly simplified, the petrochemical wastewater processing difficulty is reduced, the overall processing efficiency of sewage treatment device is promoted, and then the petrochemical wastewater processing cost is effectively reduced. ACCURACY

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, below will be to the drawing used in the embodiment or prior art description briefly introduced, obviously, the drawing in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying the creative labor, can also obtain other drawings according to the structure shown in these drawings.

[0023] Fig. 1 It is the front view cross section structure schematic diagram (working condition) of the utility model.

[0024] Fig. 2 It is the front view cross section structure schematic diagram of the utility model.

[0025] Fig. 3 It is the front view structure schematic diagram of the utility model.

[0026] Fig. 4 It is the cross section structure schematic diagram of the baffle of the utility model.

[0027] Fig. 5 It is the cross section of the baffle of the utility model.

[0028] In the drawing, X direction defines front and back (longitudinal direction), and the arrow direction defines front;Y direction defines left and right (transverse direction), and the arrow direction defines right;Z direction defines up and down (vertical direction), and the arrow direction defines up.

[0029] In the diagram, 1. Tank body; 2. Inlet; 3. Gas phase outlet; 4. Water phase outlet; 5. Oil phase outlet; 6. Fixed weir plate; 7. Inlet baffle; 8. Gas rectifier; 9. Gas phase mist eliminator via wire mesh; 10. Downstream pipe; 11. Baffle plate; 111. Upper half; 112. Lower half; 112a. Front plate; 112b. Rear plate; 112c. Through hole; 12. Anti-vortex device; 13. Saddle; 14. Nameplate bracket; 15. Bottom baffle. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] 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.

[0032] 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.

[0033] like Figs. 1-5 As shown, this utility model provides a high-efficiency pretreatment device for petrochemical wastewater, including a horizontal tank 1. An inlet 2 is provided above the rear end cap of the tank 1, a gas phase outlet 3 is provided above the cylinder of the tank 1, and a water phase outlet 4 and an oil phase outlet 5 are provided sequentially from back to front on the lower half of the cylinder of the tank 1.

[0034] The inner cavity of the tank body 1 is provided with a fixed weir plate 6, which is a non-porous integral structure, vertically arranged between the water phase outlet 4 and the oil phase outlet 5, and forms an oil-water sedimentation separation area with the rear end head of the tank body 1, and forms an oil phase containing area with the front end head of the tank body 1.

[0035] The inner cavity of the tank body 1 is also provided with an inlet baffle 7, a gas rectifier 8, a gas phase screen mist eliminator 9, a downcomer 10, a partition plate 11 and a vortex inhibitor 12. The inlet baffle 7 is arranged above the rear end of the cylinder of the tank body 1, and is spaced apart from the inlet 2 for guiding the petrochemical wastewater to flow downward in the tank body 1. The gas rectifier 8 is arranged at the middle position above the cylinder of the tank body 1, which is used to convert irregular or rotating gas flow into regular flow along the axial vertical upward. The gas phase screen mist eliminator 9 is arranged on the gas phase outlet 3, which is fixedly connected to the downcomer 10 downward; the gas phase screen mist eliminator 9 is used to separate the water vapor contained in the gas, so that it condenses into water and then enters the water phase area through the downcomer 10. The bottom end of the downcomer 10 extends to the water phase area, which is designed to make the water separated by the gas phase screen mist eliminator 9 directly flow to the water phase area. The partition plate 11 is several pieces, which are vertically arranged at the middle position below the cylinder of the tank body 1. Specifically, the several partition plates 11 are all arranged in the oil-water sedimentation separation area and are all arranged on the rear side of the water phase outlet 4. One is to prevent the impact of liquid fluctuation on the inside of the tank body 1, and the other is to effectively guide and control the flow of liquid, thereby realizing effective separation of oil phase and water phase in the oil-water sedimentation separation area. The vortex inhibitor 12 is arranged on the water phase outlet 4 and the oil phase outlet 5 respectively, which is used to prevent the formation of vortex of the fluid.

[0036] The height of the several partition plates 11 decreases from back to front, and is higher than the height of the fixed weir plate 6; the partition plate 11 includes an upper part and a lower part, the upper part is a non-porous integral structure, and the lower part is uniformly provided with a plurality of through holes 112c. The through holes 112c of the lower part are used for the water phase to pass through, and the upper part is used for purifying the oil phase; specifically, under the joint action of gravity and water flow, the liquid in the tank is generally divided into water phase, water-oil mixture and oil phase from bottom to top, and the purity of the oil phase becomes higher and higher as it goes up; the present application includes several partition plates 11, which divide the oil-water sedimentation separation area into several small areas; during the working process, the oil phase with the highest purity in the uppermost layer of a small area will overflow to the next small area, and the oil phase is purified step by step and finally flows into the oil phase containing area.

[0037] In addition, due to the separation and blockage of the partition plate, the water wave is greatly weakened, the disturbance is reduced, and several relatively calm sedimentation areas are formed in the oil-water sedimentation separation area, so that the oil in the water phase gradually floats upward to the oil phase, and the oil-water separation is accelerated.

[0038] Specifically, the working principle of the utility model is as follows: firstly, the petrochemical wastewater composed of gas, water and oil three-phase mixture enters the inside of the tank body 1 through the inlet 2, the gas phase in the petrochemical wastewater rises and is discharged from the tank body 1 through the gas phase outlet 3 due to the smallest density, and the mixture of the water phase and the oil phase in the petrochemical wastewater flows to the oil-water sedimentation separation area formed between the fixed weir plate 6 and the front end head of the tank body 1 under the guidance of the inlet baffle 7, in the process, the two gradually stratify and flow under the action of gravity due to the density difference, wherein the oil phase is located in the upper layer and the water phase is located in the lower layer, the oil phase enters the area for containing the oil phase formed between the fixed weir plate 6 and the rear end head of the tank body 1 after overflowing the fixed weir plate 6, and the water phase and the oil phase can be discharged respectively by controlling the control valves at the water phase outlet and the oil phase outlet.

[0039] Further, the bottom baffle 15 is provided at the bottom of the cylinder of the tank body 1, and is arranged between the inlet baffle 7 and the partition plate 11 located at the last end; when the petrochemical wastewater enters the tank body 1 through the inlet 2, the water flow falls along the inlet baffle 7, and the maximum water wave caused thereby can be blocked by the bottom baffle 15 to weaken the influence of the water wave on the oil-water separation and improve the separation efficiency.

[0040] Further, the bottom baffle 15 is a non-porous integral structure, and is completely immersed in the water phase.

[0041] Further, the inlet baffle 7 is a double-arc structure, the upper arc thereof protrudes forward, and the lower arc thereof protrudes backward to better guide the water flow to fall between the bottom baffle 15 and the rear end plug of the tank body 1.

[0042] The height of the fixed weir plate 6 is lower than the height of the partition plate 11 located at the frontmost position, and is used for the oil phase liquid level to overflow the fixed weir plate 6 and enter the area for containing the oil phase formed between the fixed weir plate 6 and the front end head of the tank body 1.

[0043] The horizontal interval between the top end of the inlet baffle 7 and the inlet 2 is 20 cm.

[0044] The partition plate 11 has five pieces in total; the partition plate 11 comprises an upper part and a lower part, the upper part is a non-porous integral structure; the lower part comprises a front plate 112a and a rear plate 112b, a cavity is arranged between the front plate 112a and the rear plate 112b, a plurality of through holes 112c are arranged on the front plate 112a and the rear plate 112b, and the through holes 112c on the front plate 112a and the rear plate 112b are arranged staggeredly to weaken the water wave and prevent the water flow from being disturbed.

[0045] The bottom of the cylinder of the tank body 1 is provided with a saddle 13 for supporting the tank body 1.

[0046] A nameplate support 14 is arranged at the center of the rear end head of the tank body 1.

[0047] The above is only optional embodiments of the present application, and does not limit the patent scope of the present application, any equivalent structural transformation made under the inventive concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A device for efficient pretreatment of petrochemical wastewater, characterized in that: The application relates to a horizontal tank (1) which is provided with an inlet (2) above the rear end head, a gas phase outlet (3) above the cylinder body, a water phase outlet (4) and an oil phase outlet (5) from rear to front below the front half of the cylinder body in sequence. A fixed weir plate (6) is arranged in the inner cavity of the tank (1) and is arranged vertically between the water phase outlet (4) and the oil phase outlet (5). The inner cavity of the tank (1) is further provided with an inlet baffle (7), a gas rectifier (8), a gas phase screen mist eliminator (9), a downcomer (10), a plurality of partitions (11) and two vortex preventers (12); the inlet baffle (7) is arranged above the rear end of the cylinder body of the tank (1), the gas rectifier (8) is arranged at an intermediate position above the cylinder body of the tank (1), the gas phase screen mist eliminator (9) is arranged on the gas phase outlet (3) and is fixedly connected to the downcomer (10) downward, the plurality of partitions (11) are arranged at intervals between the rear end plug of the tank (1) and the water phase outlet (4), and the two vortex preventers (12) are arranged on the water phase outlet (4) and the oil phase outlet (5) respectively. The heights of the plurality of partitions (11) decrease from rear to front and are higher than the height of the fixed weir plate (6); the partitions (11) each comprise an upper part and a lower part, and the lower part is provided with a plurality of through holes (112c).

2. The device for high-efficiency pretreatment of petrochemical wastewater according to claim 1, characterized in that: The bottom of the cylinder body of the tank (1) is provided with a bottom baffle (15).

3. The device for high-efficiency pretreatment of petrochemical wastewater according to claim 1, characterized in that: The inlet baffle (7) is a double-arc structure, the upper arc of which protrudes forward, and the lower arc of which protrudes backward.

4. The device for high-efficiency pretreatment of petrochemical wastewater according to claim 1, characterized in that: The horizontal interval between the top end of the inlet baffle (7) and the inlet (2) is 20 cm.

5. The device for high efficiency pretreatment of petrochemical wastewater according to claim 1, characterized in that: The partitions (11) are five in total.

6. The device for efficient pretreatment of petrochemical wastewater according to claim 1, characterized in that: The lower part of the partition (11) comprises a front plate (112a) and a rear plate (112b), a cavity is arranged between the front plate (112a) and the rear plate (112b), a plurality of through holes (112c) are arranged on the front plate (112a) and the rear plate (112b), and the through holes (112c) on the front plate (112a) are arranged staggeredly with the through holes (112c) on the rear plate (112b).

7. The device for efficient pretreatment of petrochemical wastewater according to claim 1, characterized in that: The bottom of the cylinder body of the tank (1) is provided with a saddle (13) for supporting the tank (1).

8. The device for high efficiency pretreatment of petrochemical wastewater according to claim 1, characterized in that: A nameplate support (14) is arranged at the central position of the rear end head of the tank (1).

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