Pretreatment device for oily sewage
By introducing air flotation and stirring mechanisms into the oily wastewater treatment device, the scum is automatically scraped off and the inner wall is cleaned, solving the problems of oil deposition and insufficient automation, and achieving efficient oil-water separation and effluent quality compliance.
Patent Information
- Application Number
- CN202423221272.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Existing oily wastewater treatment devices suffer from problems such as reduced equipment operating efficiency due to oil deposits, insufficient automation, and incomplete scum collection, which affect the normal operation of the biological system and the quality of the effluent.
An oily wastewater pretreatment device is adopted, which includes a collection mechanism, a stirring mechanism and an air flotation system in the oil storage device. The Roots blower generates fine bubbles to achieve oil-water separation. Combined with a sludge scraper, the scum is automatically scraped off. The stirring mechanism prevents oil from depositing and a cleaning component is set up to automatically clean the inner wall of the wastewater.
It achieves efficient oil-water separation, has a high degree of automation, centrally recovers scum, reduces manual intervention, extends equipment life, and ensures that the effluent water quality meets requirements.
Smart Images
Figure CN223950775U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sewage treatment technical field especially relates to oily sewage's pretreatment device. BACKGROUND
[0002] With the rapid development of industrialization and urbanization, the discharge of oily sewage has increased significantly, especially in the petrochemical industry, fine chemical industry, mechanical processing and marine engineering industries, sewage contains a large amount of oil and emulsified oil droplets. If these oily sewage is not effectively pretreated and directly enters the biochemical system, oil substances will form an oil film on the water surface, which will seriously affect the oxygen transfer efficiency, reduce the activity of microorganisms in the activated sludge, and inhibit the normal biological metabolism process, ultimately leading to the failure of the effluent quality to meet the discharge standards.
[0003] Oil pollutants in sewage can be divided into lipids formed by animal and plant fats and oil substances according to their composition, among which oil substances are particularly harmful to the sewage treatment system. When the oil concentration of oily sewage exceeds 30-50mg / L, it will significantly affect the normal metabolism of microorganisms in the activated sludge and biofilm in the biochemical system, and destroy the stable operation of the subsequent treatment unit. Therefore, the pretreatment of oily sewage is crucial.
[0004] At present, the commonly used oil-water separation methods mainly include oil separation tank, coarse granulation oil removal method and air flotation oil removal method, etc. Among them, the air flotation method has been widely used in oily sewage pretreatment due to its advantages in removing small oil droplets (such as oil droplets greater than 10μm). However, there are still some technical bottlenecks in the operation of existing air flotation devices, such as the decrease of equipment operation efficiency caused by oil deposition, the difficulty in cleaning the attachments on the inner wall of the storage device, and the incomplete collection of dregs, etc. which further increases the maintenance cost of the equipment. In addition, the system lacks automation, and the sewage flow regulation and dregs cleaning process rely too much on manual operation, making it difficult to achieve efficient and continuous treatment of oily sewage.
[0005] Therefore, the oily sewage pretreatment device is proposed to solve the above problems. UTILITY MODEL CONTENTS
[0006] In order to make up for the above shortcomings, the utility model provides an oily sewage pretreatment device, which aims to improve the problem of oil sewage directly entering the biochemical system and the influence of oil deposition on equipment operation efficiency.
[0007] In order to achieve the above object, the utility model discloses the following technical scheme: the pretreatment device of oily sewage, including oil dirt storage device, the inside collection mechanism and agitating mechanism of oil dirt storage device are provided with, the outside oil dirt storage device is provided with roots blower, booster pump house and booster pump, the output of roots blower is fixedly connected in the outside oil dirt storage device, the water pump is arranged between booster pump house and oil dirt storage device, the input of water pump is fixedly connected in the outside oil dirt storage device, the output of water pump is fixedly connected in the outside booster pump house, the output of booster pump is fixedly connected with the connecting pipe,
[0008] The collection mechanism includes a fixed plate, a mud scraper is arranged in the middle of the fixed plate, a fertilizer port is arranged on the outside of the oil dirt storage device, and a collection tank is arranged directly below the fertilizer port.
[0009] As a further description of the above technical solution:
[0010] The agitating mechanism includes an extension shaft, the top of the extension shaft is fixedly connected to the bottom of the mud scraper, a plurality of main stirring rods are fixedly connected to the outside of the extension shaft, a plurality of auxiliary stirring rods are fixedly connected between the upper and lower main stirring rods, and a cleaning assembly is arranged at the end of the main stirring rod away from the extension shaft.
[0011] As a further description of the above technical solution:
[0012] The cleaning assembly includes a hollow shell, a plurality of springs are arranged in the hollow shell, a limiting plate is slidably connected in the hollow shell, and a scraper is fixedly connected to the outside of the limiting plate.
[0013] As a further description of the above technical solution:
[0014] The input end of the booster pump is fixedly connected with a water inlet pipe, and the connecting pipe is fixedly connected with an electromagnetic valve.
[0015] As a further description of the above technical solution:
[0016] The end of the extension shaft away from the mud scraper is rotatably connected to the inner bottom wall of the oil dirt storage device, and the main stirring rod and the auxiliary stirring rod are rotatably connected in the oil dirt storage device.
[0017] As a further description of the above technical solution:
[0018] The scraper is slidably connected in the limiting plate, and the side of the scraper away from the limiting plate abuts against the inner wall of the oil dirt storage device.
[0019] As a further description of the above technical solution:
[0020] One end of the spring is fixedly connected to the limiting plate away from the side of the scraper, and the other end of the spring is in abutment with the inner wall of the hollow shell.
[0021] As a further description of the above technical solutions:
[0022] The hollow shell and the scraper are both rotationally connected inside the oil stain storage device.
[0023] The utility model has the following beneficial effects:
[0024] 1、 in the utility model, through the roots blower to the oil stain storage device introduction fine bubble, utilize the air support principle to make the emulsified oil particle rapidly and the bubble combine and float to the water surface, realize efficient oil water separation, significantly reduce the oil concentration in the sewage, ensure that the effluent water quality meets the follow-up process requirement.
[0025] 2、 in the utility model, the device top is provided with the mud scraper, can automatically scrape off the water surface dregs, and through the fertilizer mouth is discharged into the collection jar, realizes the centralized recovery of dregs, reduces manual intervention, facilitates the reuse of waste oil resources, improves the automation degree and economic benefit of device operation.
[0026] 3、 in the utility model, set up stirring mechanism, through the extension shaft drive main stirring rod and vice stirring rod carry out wide range and meticulous stirring, prevent oil stain deposition, keep the uniform flowability of sewage, accelerate the combination process of oil particle and bubble, effectively improve oil water separation efficiency.
[0027] 4、 in the utility model, the cleaning assembly on stirring mechanism is through spring reset and scraper automatic adhesion inner wall, can dynamically clean the inner wall and bottom adherend of oil stain storage device, prevent dirt accumulation influence normal operation, prolong equipment service life, reduce maintenance frequency. BRIEF DESCRIPTION OF DRAWINGS
[0028] Figure 1 It is the first perspective three-dimensional schematic view of the oil-containing sewage pretreatment device provided by the utility model;
[0029] Figure 2 It is the second perspective three-dimensional schematic view of the oil-containing sewage pretreatment device provided by the utility model
[0030] Figure 3 It is the sectional structure schematic view of the oil-containing sewage pretreatment device provided by the utility model;
[0031] Figure 4 It is Figure 3 The enlarged schematic view of A in the middle.
[0032] Legend:
[0033] 1 mud scraper; 2 fixed plate; 3 lifting pump; 4 lifting pump house; 5 water pump; 6 oil sludge storage device; 7 Roots blower; 8 collection tank; 9 fertilizer port; 10 connecting pipe; 11 electromagnetic valve; 12 water inlet pipe; 13 auxiliary stirring rod; 14 main stirring rod; 15 extension shaft; 16 limiting plate; 17 scraper; 18 spring; 19 hollow shell. DETAILED DESCRIPTION
[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0035] Referring to Figures 1-4 An embodiment provided by the present application: the pretreatment device for oil-containing sewage, including oil sludge storage device 6, the oil sludge storage device 6 inside is provided with collecting mechanism and stirring mechanism, the oil sludge storage device 6 outside is provided with Roots blower 7, lifting pump house 4 and lifting pump 3, the output end of Roots blower 7 is fixedly connected to the outside of oil sludge storage device 6, water pump 5 is arranged between lifting pump house 4 and oil sludge storage device 6, the input end of water pump 5 is fixedly connected to the outside of oil sludge storage device 6, the output end of water pump 5 is fixedly connected to the outside of lifting pump house 4, the output end of lifting pump 3 is fixedly connected with connecting pipe 10;
[0036] The collecting mechanism comprises a fixed plate 2, a mud scraper 1 arranged in the middle of the fixed plate 2, a fertilizer port 9 arranged outside an oil stain storage device 6, a collecting tank 8 arranged below the fertilizer port 9, a water inlet pipe 12 fixedly connected to an input end of a lifting pump 3, and an electromagnetic valve 11 fixedly connected inside a connecting pipe 10. The oil stain storage device 6 is used for storing oil-containing sewage and serving as a treatment unit of air floatation oil removal. The collecting mechanism comprises the fixed plate 2 and the mud scraper 1. The fixed plate 2 serves as a support. The mud scraper 1 is used for scraping off floating dregs on the water surface in the oil stain storage device 6, so as to realize centralized collection of the floating dregs. The stirring mechanism is used for stirring the sewage, preventing oil stains from depositing, and improving the air floatation efficiency. A Roots blower 7 is arranged outside the oil stain storage device 6. The Roots blower 7 generates fine bubbles by outputting gas, so that oil particles in the sewage combine with the bubbles to float to the water surface, thereby enhancing the oil-water separation effect. A lifting pump house 4 provides a space for sending the treated sewage to a subsequent process for further treatment. The input end of the lifting pump 3 is fixedly connected with the water inlet pipe 12. The water inlet pipe 12 is used for introducing external oil-containing sewage into the oil stain storage device 6. The input end of a water pump 5 is fixedly connected outside the oil stain storage device 6. The output end of the water pump 5 is connected to outside the lifting pump house 4, and is used for providing power to transport the sewage. The connecting pipe 10 is fixed to the output end of the lifting pump 3, and is used for transporting the sewage. The electromagnetic valve 11 is fixedly connected inside the connecting pipe 10, and is used for controlling the flow of the sewage, so as to realize automatic adjustment of the system. The fertilizer port 9 is arranged outside the oil stain storage device 6. The collecting tank 8 is arranged below the fertilizer port 9, and is used for receiving the floating dregs collected by the mud scraper 1, so as to realize centralized recovery and storage of waste oil.
[0037] Reference Figures 1-4The stirring mechanism comprises an extension shaft 15 fixedly connected at the top to the bottom of the mud scraper 1, a plurality of main stirring rods 14 fixedly connected to the outer side of the extension shaft 15, a plurality of auxiliary stirring rods 13 fixedly connected between the upper and lower main stirring rods 14, and a cleaning assembly arranged at the end of the main stirring rod 14 away from the extension shaft 15. The end of the extension shaft 15 away from the mud scraper 1 is rotatably connected to the inner bottom wall of the oil stain storage device 6, and the main stirring rod 14 and the auxiliary stirring rod 13 are both rotatably connected to the inside of the oil stain storage device 6. In the stirring mechanism, the extension shaft 15 serves as a transmission and support, is fixedly connected at the top to the bottom of the mud scraper 1, rotates by the driving of the mud scraper 1, and enables the whole stirring mechanism to perform stirring operation. The main stirring rod 14 is fixedly connected to the outer side of the extension shaft 15, is mainly used for stirring the sewage in the oil stain storage device 6 in a large range, prevents oil stains from depositing, and accelerates the combination process of oil particles and bubbles in the sewage. The auxiliary stirring rod 13 fixedly connected between the upper and lower main stirring rods 14 is used for realizing fine stirring of the sewage, enhancing the flowability and uniformity of the sewage, and improving the oil-water separation effect. The cleaning assembly arranged at the end of the main stirring rod 14 away from the extension shaft 15 is used for removing the attachments on the inner wall or bottom of the oil stain storage device 6, avoids accumulation of dirt, and guarantees stable operation of the device. The bottom of the extension shaft 15 rotatably connected to the inner bottom wall of the oil stain storage device 6 at the end away from the mud scraper 1 is used for supporting the rotary motion of the extension shaft 15, and ensures smooth operation of the stirring mechanism. The main stirring rod 14 and the auxiliary stirring rod 13 are both rotatably connected to the inside of the oil stain storage device 6, so that the stirring mechanism can rotate synchronously under the driving, uniformly stirs the sewage, and improves the efficiency of oil particles floating in the sewage.
[0038] With reference to Figures 1-4The cleaning assembly comprises a hollow shell 19, a plurality of springs 18 arranged inside the hollow shell 19, a limiting plate 16 slidingly connected inside the hollow shell 19, a scraper 17 fixedly connected to the outside of the limiting plate 16, the scraper 17 being slidingly connected inside the limiting plate 16, the scraper 17 being in abutment with the inner wall of the oil stain storage device 6 on the side away from the limiting plate 16, one end of the spring 18 being fixedly connected to the side of the limiting plate 16 away from the scraper 17, the other end of the spring 18 being in abutment with the inner wall of the hollow shell 19, and the hollow shell 19 and the scraper 17 being both rotationally connected inside the oil stain storage device 6. In the cleaning assembly, the hollow shell 19 serves as a support and protection, internally accommodating other key components, and is rotationally connected inside the oil stain storage device 6 to rotate synchronously with the main stirring rod 14, thereby achieving dynamic cleaning. The spring 18 is arranged inside the hollow shell 19, one end of the spring 18 being fixedly connected to the side of the limiting plate 16 away from the scraper 17, and the other end of the spring 18 being in abutment with the inner wall of the hollow shell 19, thereby serving as an elastic reset function to ensure that the scraper 17 can automatically rebound when subjected to resistance and tightly adhere to the cleaning surface. The limiting plate 16 is slidingly connected inside the hollow shell 19, mainly serving as a guide and limiting function to control the extension and retraction of the scraper 17, thereby enabling the scraper 17 to flexibly adjust the contact state with the inner wall of the oil stain storage device 6. The outer side of the scraper 17 is in abutment with the inner wall of the oil stain storage device 6, thereby achieving the cleaning function of dirt through contact and friction with the inner wall, scraping off the oil stains and deposits adhering to the inner wall, and preventing the accumulation of dirt from affecting the normal operation of the device. The other side of the scraper 17 is slidingly connected inside the limiting plate 16, thereby enabling it to automatically and elastically adjust under the action of the spring 18, and ensuring the stability of the cleaning effect. The cleaning assembly drives the scraper 17 to abut against the inner wall for cleaning through the rotation of the hollow shell 19, the spring 18 provides elastic support, and the limiting plate 16 guides the sliding movement of the scraper 17, thereby ensuring that the scraper 17 tightly adheres to the inner wall during the cleaning process, effectively removing the adhering substances from the inner wall of the oil stain storage device 6, maintaining the cleanliness inside the storage device, and ensuring the stable operation of the equipment for a long time.
[0039] Working principle: The oil-contaminated water is transported into the oil stain storage device 6 by the lifting pump 3, the central control system controls the opening and closing of the electromagnetic valve 11 to adjust the inflow speed of the sewage, and to ensure the stable operation of the system. The Roots blower 7 introduces gas into the oil stain storage device 6, generating a large number of fine bubbles, which combine with the emulsified oil particles in the sewage, and make the oil particles float to the water surface under the action of air flotation, forming a scum layer.
[0040] The scum layer is collected by the mud scraper 1 at the top of the oil stain storage device 6, the mud scraper 1 is supported by the fixed plate 2, and the scum is scraped along the water surface and guided to the fertilizer port 9 outside the oil stain storage device 6, and finally discharged into the collection tank 8, thereby realizing the centralized recovery and storage of the scum, effectively recovering the waste oil resources, and preventing the accumulation of scum from affecting the oil-water separation effect.
[0041] In order to prevent the oil dirt from depositing at the bottom of the storage device and improve the oil-water separation efficiency, the stirring mechanism is arranged inside the device. The stirring mechanism is driven by the extension shaft 15, the top of which is connected with the mud scraper 1, and the rotation is realized by the driving of the mud scraper 1. A plurality of main stirring rods 14 are fixedly connected outside the extension shaft 15, the main stirring rods 14 are used for stirring the sewage in a large range, keeping the flowability of the sewage, accelerating the combination process of the oil particles and the bubbles, and promoting the oil-water separation effect. The auxiliary stirring rods 13 are fixedly connected between the main stirring rods 14, and are used for finely stirring the sewage, enhancing the uniformity of the sewage, and avoiding the deposition of the oil dirt and solid particles.
[0042] Meanwhile, in order to keep the inside of the oil dirt storage device 6 clean, the cleaning assembly is arranged at the end of the main stirring rod 14 away from the extension shaft 15. The cleaning assembly comprises a hollow shell 19, a spring 18, a limiting plate 16 and a scraper 17. During the rotation of the main stirring rod 14, the hollow shell 19 rotates synchronously, and drives the scraper 17 to contact the inner wall of the oil dirt storage device 6. The spring 18 provides elastic support, so that the scraper 17 can automatically rebound when encountering resistance, maintains the close contact with the inner wall, and realizes the dynamic cleaning. The limiting plate 16 plays a guiding and limiting role, controls the sliding movement of the scraper 17, and ensures the stability of the cleaning. The scraper 17 effectively scrapes off the oil dirt and deposits on the inner wall of the storage device through the contact friction with the inner wall, avoids the dirt accumulation affecting the normal operation of the equipment, and maintains the clean state of the storage device.
[0043] After the auxiliary treatment of the air floatation separation and the stirring mechanism, the treated sewage is discharged from the bottom of the oil dirt storage device 6, and is delivered to the lifting pump house 4 through the water pump 5, so that the sewage is delivered to the subsequent process unit for further treatment, and the effluent quality meets the discharge standard.
[0044] In summary, the device realizes the oil-water separation through the air floatation effect, the mud scraper 1 collects the dregs and discharges into the collecting tank 8, the stirring mechanism prevents the deposition of the oil dirt and improves the air floatation effect, the cleaning assembly automatically scrapes off the attachments on the inner wall, and the water pump 5 and the lifting pump 3 cooperate to realize the efficient delivery of the sewage. The whole system is reasonably designed and perfectly functional, ensures the long-time stable operation of the equipment, and realizes the efficient treatment and resource recovery of the oily sewage.
[0045] Finally, it should be noted that: the above only describes the preferred embodiments of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.
Claims
1. A device for pre-treatment of oil-contaminated water, comprising an oil-contaminated storage device (6), characterized in that: The oil dirt storage device (6) is internally provided with a collecting mechanism and a stirring mechanism, the oil dirt storage device (6) is externally provided with a Roots blower (7), a lifting pump house (4) and a lifting pump (3), the output end of the Roots blower (7) is fixedly connected to the outside of the oil dirt storage device (6), a water pump (5) is arranged between the lifting pump house (4) and the oil dirt storage device (6), the input end of the water pump (5) is fixedly connected to the outside of the oil dirt storage device (6), the output end of the water pump (5) is fixedly connected to the outside of the lifting pump house (4), and the output end of the lifting pump (3) is fixedly connected with a connecting pipe (10). The collecting mechanism comprises a fixed plate (2), a mud scraper (1) is arranged in the middle of the fixed plate (2), a fertilizer port (9) is arranged on the outside of the oil dirt storage device (6), and a collecting tank (8) is arranged directly below the fertilizer port (9).
2. The oil-containing wastewater pretreatment device according to claim 1, characterized in that: The stirring mechanism comprises an extension shaft (15), the top of the extension shaft (15) is fixedly connected to the bottom of the mud scraper (1), a plurality of main stirring rods (14) are fixedly connected to the outside of the extension shaft (15), a plurality of auxiliary stirring rods (13) are fixedly connected between the upper and lower main stirring rods (14), and cleaning assemblies are arranged at the ends, away from the extension shaft (15), of the main stirring rods (14).
3. The oil-containing wastewater pretreatment device according to claim 2, characterized in that: The cleaning assembly comprises a hollow shell (19), a plurality of springs (18) are arranged in the hollow shell (19), a limiting plate (16) is slidably connected in the hollow shell (19), and a scraper (17) is fixedly connected to the outside of the limiting plate (16).
4. The oil-containing wastewater pretreatment device according to claim 1, characterized by: The input end of the lifting pump (3) is fixedly connected with a water inlet pipe (12), and the connecting pipe (10) is fixedly connected with an electromagnetic valve (11) inside.
5. The oil-containing wastewater pretreatment device according to claim 2, characterized in that: The end, away from the mud scraper (1), of the extension shaft (15) is rotatably connected to the inner bottom wall of the oil dirt storage device (6), and the main stirring rods (14) and the auxiliary stirring rods (13) are both rotatably connected in the oil dirt storage device (6).
6. The oil-containing wastewater pretreatment device according to claim 3, characterized in that: The scraper (17) is slidably connected in the limiting plate (16), and the side, away from the limiting plate (16), of the scraper (17) abuts against the inner wall of the oil dirt storage device (6).
7. The oil-containing wastewater pretreatment device according to claim 3, characterized in that: One end of the spring (18) is fixedly connected to the side, away from the scraper (17), of the limiting plate (16), and the other end of the spring (18) abuts against the inner wall of the hollow shell (19).
8. The oil-containing wastewater pretreatment device according to claim 3, characterized in that: The hollow shell (19) and the scraper (17) are both rotatably connected in the oil dirt storage device (6).