Treatment device for comprehensively treating organic waste liquid

Abstract

The utility model discloses a treatment device for comprehensively treating organic waste liquid, and relates to the technical field of organic waste liquid treatment, the treatment device comprises efficient demulsification and air floatation integrated equipment, an oil-water lifting pump and evaporation equipment, the efficient demulsification and air floatation integrated equipment consists of three oil-water separation areas, a floating oil collecting tank and an oil-water collecting tank, a paddle type stirrer and a plate type stirrer are respectively mounted on the inner side of the oil-water separation area, and a scraping plate is arranged at the upper end of the inner side of the oil-water separation area. According to the treatment device for comprehensively treating the organic waste liquid, demulsification and air flotation integrated equipment and a comprehensive evaporation method are adopted for pretreatment, the use of a Fenton reagent is reduced, the treatment cost is greatly reduced, meanwhile, unsafe risk factors caused by the filter pressing process are reduced, single-effect evaporation is adopted, operation is easy, control is convenient, and the treatment device is suitable for large-scale popularization and application. And oil and water cannot be slowly adhered to the tube nests to block the tube nests due to high temperature, so that the heat exchange efficiency is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of organic waste liquid treatment, in particular to a treatment device for comprehensively treating organic waste liquid. Background Technique

[0002] Organic waste liquid belongs to hazardous waste. For the treatment of high-concentration organic waste liquid, common methods such as biological method, physicochemical method, and chemical method are used in combination. The biological method generally requires good biodegradability of the waste liquid for treating low-concentration organic waste liquid. The physicochemical method and chemical method use a large amount of chemicals and have high disposal costs. When using incineration for disposal, the concentration of organic waste liquid needs to be very high, above 300000 mg / L, to ensure a calorific value above 2000 kcal / kg, and generally companies cannot all configure incineration disposal device equipment;

[0003] At present, the pretreatment process of organic waste liquid and emulsion generally selects demulsification + air flotation + Fenton + multi-effect evaporation. The Fenton process has high treatment costs, many steps and complex operations. After treatment, pressure filtration clogs the filter cloth, posing a great safety risk. When the multi-effect evaporation system evaporates organic waste liquid, the organic waste liquid is prone to sticking to the cracking tubes, resulting in blockage of the evaporation system and reduced heat exchange efficiency.

[0004] At present, most high-concentration organic waste liquids adopt the Fenton process after demulsification and oil separation. The Fenton process has problems such as a large amount of chemicals (ferrous sulfate, hydrogen peroxide) used, high chemical costs, high storage requirements for hydrogen peroxide, and the risk of filter cloth clogging during pressure filtration after Fenton process treatment. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a treatment device for comprehensively treating organic waste liquid, which solves the problems that most high-concentration organic waste liquids adopt the Fenton process after demulsification and oil separation, with a large amount of chemicals (ferrous sulfate, hydrogen peroxide) used in the Fenton process, high chemical costs, high storage requirements for hydrogen peroxide, and the risk of filter cloth clogging during pressure filtration after Fenton process treatment.

[0006] To achieve the above objectives, the utility model is realized through the following technical solutions: A treatment device for comprehensively treating organic waste liquid, including a high-efficiency demulsification and air flotation integrated device, an oil-water lift pump, and an evaporation device. The high-efficiency demulsification and air flotation integrated device consists of three oil-water separation zones, an oil collection pool, and an oil-water collection pool. A paddle stirrer and a plate stirrer are respectively installed inside the oil-water separation zones. A scraper is arranged at the upper end inside the oil-water separation zones. The three oil-water separation zones are connected to each other through waste liquid flow channels, and the waste liquid flow channels are arranged in a staggered manner. The right side at the upper end of the oil-water separation zone is connected to the oil collection pool, and the left side at the upper end of the oil-water collection pool is connected to the oil collection pool. Pump inlet control valves and pump outlet control valves are respectively arranged on the left and right sides of the surface of the oil-water lift pump;

[0007] The evaporation device consists of an evaporation kettle and a steam shell layer. The lower end of the evaporation kettle is fixedly connected to the steam shell layer. A steam inlet is arranged on the surface of the steam shell layer. An evaporation stirrer is installed at the upper end of the evaporation kettle. An oil-water inlet of the evaporation system and a distilled water outlet are respectively arranged on the left and right sides at the upper end of the evaporation kettle.

[0008] Preferably, there are two paddle stirrers. Motors are arranged at the upper ends of the paddle stirrers and the plate stirrer, and the motors are fixedly connected to the upper end of the high-efficiency demulsification air flotation integrated device.

[0009] Preferably, the lower end of the floating oil collection tank is designed in a funnel shape, and a floating oil outlet is arranged at the lower end of the floating oil collection tank.

[0010] Preferably, an emptying pipeline is installed at the bottom of the high-efficiency demulsification air flotation integrated device. One end of the emptying pipeline is provided with a discharge port. The other end of the emptying pipeline is respectively connected to the oil-water separation area and the oil-water collection tank through branch pipes, and valves are arranged on the branch pipes.

[0011] Preferably, an oil-water outlet is arranged at the bottom of the oil-water collection tank. The oil-water outlet is connected to the pump inlet control valve through a pipeline, and the pump outlet control valve is connected to the oil-water inlet of the evaporation system through a pipeline.

[0012] Preferably, a steam heating chamber is arranged between the steam shell layer and the evaporation kettle, and the steam heating chamber is connected to the steam inlet.

[0013] Preferably, the stirring rod of the evaporation stirrer extends to the bottom of the evaporation kettle and is fixedly installed with stirring blades. An evaporation concentrated organic matter outlet and a steam condensate outlet are arranged at the lower end of the steam shell layer, and the evaporation concentrated organic matter outlet and the steam condensate outlet are respectively connected to the bottom of the evaporation kettle.

[0014] The beneficial effects are as follows:

[0015] The utility model provides a treatment device for comprehensively treating organic waste liquid. Compared with the prior art, the following beneficial effects are achieved:

[0016] The treatment device for comprehensively treating organic waste liquid. After demulsification, the organic waste liquid enters the integrated demulsification and air flotation device. In the multiple oil-water separation zones of the integrated demulsification and air flotation device, it is convenient to add demulsifying agents and compressed air. Thus, through rapid stirring by the paddle stirrer, the oil and water are separated. The slow stirring of the plate stirrer causes the upper sludge to be sent into the floating oil collection tank through the scraper. The floating oil is sent into the evaporation kettle through the floating oil outlet for distillation and recycling. The oil and water are collected in the oil-water collection tank and pumped to the evaporation kettle through the oil-water lift pump. After evaporation and concentration, the distilled water enters the biochemical system from the distilled water outlet for further treatment, while the concentrated organic matter is utilized resourcefully. By using the comprehensive method of the integrated demulsification and air flotation device and evaporation for pretreatment, the use of Fenton agents is reduced, and the treatment cost is greatly reduced. At the same time, the unsafe risk factors brought by the pressure filtration process are reduced. Single-effect evaporation is adopted, with simple operation and convenient control, and it will not cause problems such as the oil and water sticking to the tube bundles due to high temperature and blocking, resulting in reduced heat exchange efficiency, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall structural schematic diagram of the present utility model.

[0018] In the figure: 1. Integrated high-efficiency demulsification and air flotation device; 2. Paddle stirrer; 3. Waste liquid flow trough; 4. Oil-water separation zone; 5. Plate stirrer; 6. Scraper; 7. Floating oil collection tank; 8. Oil-water collection tank; 9. Vent pipe; 10. Floating oil outlet; 11. Oil-water outlet; 12. Oil-water lift pump; 13. Pump inlet control valve; 14. Pump outlet control valve; 15. Oil-water inlet of evaporation system; 16. Evaporation stirrer; 17. Evaporation equipment; 171. Evaporation kettle; 18. Steam inlet; 19. Evaporation and concentration of organic matter outlet; 20. Steam condensate outlet; 21. Steam shell; 211. Steam heating chamber; 22. Distilled water outlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figure 1, the present utility model provides a technical solution: a treatment device for comprehensively treating organic waste liquid, including a high-efficiency demulsification and air flotation integrated device 1, an oil-water lift pump 12 and an evaporation device 17. The high-efficiency demulsification and air flotation integrated device 1 is composed of three oil-water separation zones 4, an oil collection tank 7 and an oil-water collection tank 8. Inside the oil-water separation zones 4, a paddle mixer 2 and a plate mixer 5 are respectively installed. There are two paddle mixers 2. Motors are arranged at the upper ends of the paddle mixer 2 and the plate mixer 5, and the motors are fixedly connected to the upper end of the high-efficiency demulsification and air flotation integrated device 1. A scraper 6 is arranged at the upper end inside the oil-water separation zones 4. The three oil-water separation zones 4 are connected to each other through waste liquid flow channels 3, and the waste liquid flow channels 3 are arranged in a staggered manner. The right side at the upper end of the oil-water separation zone 4 is connected to the oil collection tank 7. The lower end of the oil collection tank 7 is designed in a funnel shape, and an oil outlet 10 is arranged at the lower end of the oil collection tank 7. The multiple oil-water separation zones 4 and the paddle mixer 2 facilitate the separation of oil and water. The residence time of oil and water in the oil-water separation zones 4 is long enough for the organic waste liquid to complete demulsification and oil-water separation in the oil-water separation zones 4. The paddle mixer 2 can make the oil-water mixture fully react and stir for separation. The stirring rate of the plate mixer 5 is slow, so that the oil layer will not be stirred to the lower layer at the end of the oil-water separation zone 4, resulting in good oil-water stratification. The upper layer is the oil layer and the lower layer is the oil-water layer. At the same time, it is matched with the scraper 6. The scraper 6 is arranged 5 cm below the liquid level, which is convenient to scrape the upper oil layer into the oil collection tank 7. The motor control of the scraper 6 is variable frequency, and the oil scraping frequency can be adjusted;

[0021] The left side at the upper end of the oil-water collection tank 8 is connected to the oil collection tank 7. On the left and right sides of the surface of the oil-water lift pump 12, a pump inlet control valve 13 and a pump outlet control valve 14 are respectively arranged. A vent pipe 9 is installed at the bottom of the high-efficiency demulsification and air flotation integrated device 1. One end of the vent pipe 9 is provided with a discharge port, and the other end of the vent pipe 9 is respectively connected to the oil-water separation zones 4 and the oil-water collection tank 8 through branch pipes. Valves are arranged on the branch pipes. An oil-water outlet 11 is arranged at the bottom of the oil-water collection tank 8. The oil-water outlet 11 is connected to the pump inlet control valve 13 through a pipeline. The pump outlet control valve 14 is connected to the oil-water inlet 15 of the evaporation system through a pipeline. The liquid level of the oil-water collection tank 8 is interlocked with the oil-water lift pump 12 to prevent the lift pump from being evacuated, so as to send the oil and water into the evaporation device 17;

[0022] The evaporation device 17 consists of an evaporation kettle 171 and a steam shell 21. The lower end of the evaporation kettle 171 is fixedly connected to the steam shell 21. A steam inlet 18 is provided on the surface of the steam shell 21. A steam heating chamber 211 is arranged between the steam shell 21 and the evaporation kettle 171. The steam heating chamber 211 is connected to the steam inlet 18. An evaporation stirrer 16 is installed at the upper end of the evaporation kettle 171. An evaporation system oil-water inlet 15 and a distilled water outlet 22 are respectively arranged on the left and right sides at the upper end of the evaporation kettle 171. The stirring rod of the evaporation stirrer 16 extends to the bottom of the evaporation kettle 171 and is fixedly installed with stirring blades. An evaporation concentrated organic matter outlet 19 and a steam condensate outlet 20 are arranged at the lower end of the steam shell 21. The evaporation concentrated organic matter outlet 19 and the steam condensate outlet 20 are respectively connected to the bottom of the evaporation kettle 171. Steam is sent into the steam heating chamber 211 through the steam inlet 18 to heat the oil and water in the evaporation kettle 171. After evaporation and concentration, the distilled water is discharged from the distilled water outlet 22 and enters the biochemical system for further treatment, while the evaporation concentrated organic matter is discharged from the evaporation concentrated organic matter outlet 19 to realize the resource utilization of the concentrated organic matter. At the same time, the evaporation stirrer 16 can be used to judge and confirm the evaporation concentration multiple. When the concentration multiple of the organic mixture is getting higher and higher, the organic waste liquid becomes more and more viscous, and the current of the evaporation stirrer 16 becomes larger and larger. When it reaches a certain value, the heating is stopped, the discharge valve is opened, and indirect heating of steam and the oil-water mixture is carried out. The evaporation condensate can be reused as the raw material of steam, improving the practicability.

[0023] During operation, the high-efficiency demulsification and air flotation integrated device 1 includes three parts: an oil-water separation area 4, an oil skimming pool 7, and an oil-water collection pool 8. After the organic waste liquid is demulsified and the oil and water are separated by air flotation, there are still a lot of organic substances in the water. Therefore, the demulsified organic waste liquid is fed into the oil-water separation area 4. In order to quickly separate the demulsified organic waste liquid, the paddle stirrer 2 realizes the oil-water separation through rapid stirring, and the plate stirrer 5 slowly stirs to separate the oil and water. The oil is on the upper layer and the water is on the lower layer. The oil can be scraped to the oil skimming pool 7 by the scraper 6. The oil and water after oil separation are stored in the oil-water collection pool 8. When the high-efficiency demulsification and air flotation integrated device 1 is out of use, the liquid inside needs to be completely discharged and cleaned, and discharged through the emptying pipeline 9;

[0024] When a certain amount of oil and water is collected, it is pumped to the evaporation equipment 17 through the oil-water lift pump 12. The pump inlet control valve 13 is closed for the maintenance of the oil-water lift pump 12, and the pump outlet control valve 14 is used to control the pump flow rate, so as to send the floating oil into the evaporation kettle 171 through the oil-water inlet 15 of the evaporation system. And steam is sent into the steam heating chamber 211 through the steam inlet 18. The steam heats the oil and water, and the generated steam condensate is discharged from the steam condensate outlet 20, and the distilled water is discharged from the distilled water outlet 22 and collected and then sent to the next-stage biochemical system for treatment. The evaporation agitator 16 judges the evaporation and concentration situation through the current of the agitator. When the current reaches a certain value, the blanking valve is opened, and the evaporated and concentrated organic matter is discharged from the evaporated and concentrated organic matter outlet 19.

[0025] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. A comprehensive treatment device for treating organic waste liquid, comprising a high-efficiency demulsification and flotation integrated device (1), an oil-water lifting pump (12) and an evaporation device (17), characterized in that: The high-efficiency demulsification and flotation integrated equipment (1) is composed of three oil-water separation zones (4) and a floating oil collection pool (7) and an oil-water collection pool (8). A paddle stirrer (2) and a plate stirrer (5) are installed on the inner side of the oil-water separation zone (4), respectively. A scraper (6) is arranged at the upper end of the inner side of the oil-water separation zone (4). The three oil-water separation zones (4) are connected to each other through waste liquid circulation grooves (3), and the waste liquid circulation grooves (3) are arranged in a staggered manner. The right side of the upper end of the oil-water separation zone (4) is connected to the floating oil collection pool (7), and the left side of the upper end of the oil-water collection pool (8) is connected to the floating oil collection pool (7). The left and right sides of the surface of the oil-water lifting pump (12) are respectively provided with a pump inlet control valve (13) and a pump outlet control valve (14); The evaporation device (17) is composed of an evaporation kettle (171) and a steam shell (21). The lower end of the evaporation kettle (171) is fixedly connected to the steam shell (21). A steam inlet (18) is provided on the surface of the steam shell (21). An evaporation stirrer (16) is installed at the upper end of the evaporation kettle (171). The left and right sides of the upper end of the evaporation kettle (171) are respectively provided with an evaporation system oil and water inlet (15) and a distilled water outlet (22).

2. A comprehensive treatment device for organic waste liquid according to claim 1, characterized in that: Two paddle agitators (2) are provided, and motors are provided at the upper ends of the paddle agitators (2) and the plate agitators (5), and the motors are fixedly connected to the upper end of the high-efficiency demulsification and air flotation integrated equipment (1).

3. The comprehensive treatment device for organic waste liquid according to claim 1 is characterized in that: The lower end of the floating oil collection tank (7) is designed as a funnel-shaped structure, and the lower end of the floating oil collection tank (7) is provided with a floating oil outlet (10).

4. The comprehensive treatment device for treating organic waste liquid according to claim 1 is characterized in that: A venting pipe (9) is installed at the bottom of the high-efficiency demulsification and air flotation integrated equipment (1), one end of the venting pipe (9) is provided with a discharge port, and the other end of the venting pipe (9) is connected to the oil-water separation area (4) and the oil-water collection tank (8) through branch pipes, respectively, and valves are provided on the branch pipes.

5. The comprehensive treatment device for treating organic waste liquid according to claim 1 is characterized in that: An oil-water outlet (11) is provided at the bottom of the oil-water collection pool (8); the oil-water outlet (11) and the pump inlet control valve (13) are connected via a pipeline; and the pump outlet control valve (14) and the evaporation system oil-water inlet (15) are connected via a pipeline.

6. A comprehensive treatment device for organic waste liquid according to claim 1, characterized in that: A steam heating chamber (211) is provided between the steam shell layer (21) and the evaporation kettle (171), and the steam heating chamber (211) is connected to the steam inlet (18).

7. The comprehensive treatment device for organic waste liquid according to claim 1 is characterized in that: The stirring rod of the evaporation stirrer (16) extends to the bottom of the evaporation kettle (171) and is fixedly provided with a stirring blade. The lower end of the steam shell (21) is provided with an evaporation concentrated organic matter outlet (19) and a steam condensed water outlet (20). The evaporation concentrated organic matter outlet (19) and the steam condensed water outlet (20) are respectively connected to the bottom of the evaporation kettle (171).

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