Washing flotation tank

Abstract

The utility model discloses a washing flotation tank which comprises a tank body, and a stirring main shaft is arranged in the tank body. A feeding hole I and a feeding hole II are formed in the tank body, the feeding hole I is used for feeding fly ash slurry, and the feeding hole II is used for feeding waste engine oil; a flotation scraping plate is arranged on the stirring main shaft and is used for scraping out a mixture of waste engine oil and activated carbon foam; a first discharging opening is formed in the position, close to the flotation scraping plate, of the tank body and used for discharging a mixture of waste engine oil and activated carbon foam. The waste engine oil can be used as a flotation agent through the washing flotation tank, activated carbon in fly ash can be efficiently recycled in cooperation with a washing method, more activated carbon can be effectively floated out, resource waste is reduced, and the device is more environmentally friendly. Meanwhile, due to recycling of the waste engine oil, dependence on other chemicals is reduced, and secondary pollution possibly generated in the wastewater treatment process is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of domestic waste utilization, and particularly relates to a water washing flotation tank. BACKGROUND

[0002] The domestic waste incineration fly ash is listed as "HW18 incineration disposal residue" in the "National Hazardous Waste List", and the fly ash contains heavy metals, dioxin and other characteristic pollutants. The distribution of these pollutants in the fly ash is not uniform, but mainly concentrates on the activated carbon particles. The activated carbon has strong adsorption capacity due to its porosity and high specific surface area, and can adsorb a large amount of pollutants. The domestic waste incineration flue gas treatment adopts the combination technology of activated carbon adsorption and bag dust collector to remove the heavy metals and dioxin in the flue gas. The micropores of the activated carbon as a kind of high-efficiency adsorbent are between 0.5-1.4mm, and the specific surface area is large, so the activated carbon has large adsorption capacity and fast adsorption rate for various inorganic and organic gases, heavy metal ions and the like, and is used to adsorb dioxin and heavy metals in the flue gas in the industry. According to the estimation, the production amount of the fly ash is about 2%-3% of the domestic waste (for the grate furnace), and the industry generally restricts that the addition amount of the activated carbon should reach the standard of not less than 0.25kg / t of waste, so the amount of the activated carbon accounts for about 1% of the fly ash. However, the content of the heavy metals and dioxin in the activated carbon is much higher than that in the fly ash, so the recovery of the activated carbon from the fly ash not only helps the recycling of the fly ash resources, but also effectively reduces the environmental pollution. However, there is a lack of equipment for effectively recovering the activated carbon in the fly ash in the prior art. SUMMARY

[0003] The utility model discloses a water washing flotation tank.

[0004] The utility model discloses a water washing flotation tank to realize the following technical scheme in order to realize the above-mentioned purpose:

[0005] A water washing flotation tank, comprising a tank body, a stirring main shaft is arranged in the tank body;

[0006] A first feeding port and a second feeding port are arranged on the tank body, the first feeding port is used for feeding fly ash slurry, and the second feeding port is used for feeding waste engine oil;

[0007] A flotation scraper is arranged on the stirring main shaft, and the flotation scraper is used for scraping out the waste engine oil and activated carbon foam mixture;

[0008] A first discharging port is arranged on the tank body and close to the height of the flotation scraper, and the first discharging port is used for discharging the waste engine oil and activated carbon foam mixture.

[0009] As a further description of the above technical scheme, the overflow control angle is arranged on the tank body, and the liquid level in the tank body is arranged at 50mm below the liquid level control angle.

[0010] As a further description of the above technical scheme, the second discharging port is arranged on the tank body, and is used for discharging supernatant.

[0011] As a further description of the above technical scheme, the bottom layer scraper is arranged below the stirring main shaft.

[0012] As a further description of the above technical scheme, the third discharging port is arranged at the bottom of the tank body, and is used for discharging the washed fly ash slurry.

[0013] As a further description of the above technical scheme, one end of the floatation scraper is in a square sheet shape, and the other end is in a circular arc shape.

[0014] As a further description of the above technical scheme, the ratio of fly ash to water in the fly ash slurry is 1:3.

[0015] As a further description of the above technical scheme, the overflow control angle comprises a tank body part and an inclination part, and the inclination part is arranged in a downward slope.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. In the present application, the water washing floatation tank can use waste engine oil as a floatation agent, and cooperates with the water washing method to efficiently recycle the activated carbon in the fly ash, so that more activated carbon can be effectively floated out, resource waste is reduced, and the present application is more environmentally friendly. Meanwhile, the recycling of waste engine oil reduces the dependence on other chemicals, and reduces the secondary pollution possibly generated in the wastewater treatment process.

[0018] In order to more clearly illustrate the structural features and effects of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic view of the water washing floatation tank provided by the present application.

[0020] Reference signs: 1, tank body; 2, stirring main shaft; 3, fly ash slurry inlet pipe; 4, waste engine oil inlet pipe; 5, floatation scraper; 6, bottom layer scraper; 7, floatation activated carbon outlet; 8, supernatant discharge pipe after washing; 9, fly ash slurry outlet after washing; 10, overflow control angle. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0022] like Figure 1 As shown, in one embodiment, a water washing flotation tank includes a tank body 1, a stirring shaft 2 is provided inside the tank body 1, and a drive motor (not shown in the figure) can be provided above the stirring shaft 2, which can drive the stirring shaft 2 to rotate.

[0023] The tank body 1 is equipped with inlet 1 and inlet 2. Inlet 1 is used for feeding fly ash slurry, and inlet 2 is used for feeding waste engine oil. Specifically, inlet 1 is the fly ash slurry inlet pipe 3, and inlet 2 is the waste engine oil inlet pipe 4. Both inlet 1 and inlet 2 are equipped with valves to control the amount of feed into the tank.

[0024] A flotation scraper 5 is provided on the stirring shaft 2. In some embodiments, one end of the flotation scraper 5 is square and the other end is arc-shaped, with the arc-shaped design facilitating the flow of materials. When the scraper moves, the arc-shaped end can better push the material along the tank wall or in a specific direction. The flotation scraper 5 is used to scrape out the mixture of waste oil and activated carbon foam. The flotation scraper 5 is located in the upper part of the stirring shaft 2. Since the mixture of waste oil and activated carbon foam has a low density, it will float on the upper layer. Therefore, by setting the flotation scraper 5, the mixture can be scraped out quickly, which is more convenient and the process is simpler.

[0025] A discharge port 1, which is the activated carbon outlet 7, is provided on the tank body 1 at a height close to the flotation scraper 5. The discharge port 1 is used to discharge the mixture of waste oil and activated carbon foam.

[0026] Optionally, the tank body 1 is provided with an overflow control angle 10. The liquid level in the tank body 1 is set 50mm below the liquid level control angle. The overflow control angle 10 includes the tank body 1 and the inclined part. The inclined part is set at an angle downward. When the liquid level exceeds the overflow control angle 10, it can be discharged outward from the overflow control angle 10 to avoid too much liquid inside the tank body 1, which would prevent normal water washing and flotation from being carried out.

[0027] Optionally, the tank body 1 is provided with a discharge port 2, which is used for the discharge of supernatant. The discharge port 2 is the supernatant discharge pipe 8 after water washing. The supernatant can be discharged through the supernatant discharge pipe 8 and then put into other processes for recycling, which is more environmentally friendly.

[0028] Optionally, the lower part of the stirring spindle 2 is provided with a bottom scraper 6, and the bottom of the tank 1 is provided with a third discharge port, i.e. a washed slurry outlet 9, for discharging the washed slurry, so that the slurry is prevented from being blocked in front of the slurry outlet, thereby affecting the normal slurry discharge.

[0029] Working principle:

[0030] The fly ash and water are prepared into a fly ash slurry in a mass ratio of 1:3, the fly ash slurry is fed into the tank 1 through the fly ash slurry feeding pipe 3, the liquid level is at a position 50 mm below the overflow control angle 10, and the scraper is started to stir under the driving of the stirring spindle 2, so that the fly ash slurry is fully mixed, which helps the chlorides in the fly ash to dissolve in water.

[0031] The waste engine oil is added into the tank 1 through the waste engine oil feeding pipe 4, the liquid level is at the overflow control angle 10, and the waste engine oil is mixed and stirred with the fly ash slurry in the tank.

[0032] Flotation: the waste engine oil acts as a capturing agent and a flotation agent in the tank, and the activated carbon has oleophilicity, so that the waste engine oil and the activated carbon are mixed and then float on the upper part of the slurry.

[0033] The flotation scraper 5 scrapes off the waste engine oil and activated carbon foam mixture through the flotation activated carbon outlet 7 by using centrifugal force, and then the waste engine oil and activated carbon foam mixture are collected for joint treatment.

[0034] After the waste engine oil and activated carbon foam mixture are fully floated, the stirring is stopped, and the washed supernatant discharge pipe 8 is opened after the tank is left to stand, so that the washed supernatant is discharged for sewage treatment and then recycled.

[0035] The slurry after removing the supernatant is discharged from the washed slurry outlet 9 for drying, so as to be used for resource utilization in the next step.

[0036] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, the circuit connection adopts the conventional connection mode in the prior art, and details are not described herein, and the contents not described in detail in the description belong to the prior art known to the person skilled in the art.

[0037] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the utility model. Various modifications of these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied without departing from the spirit of the utility model.

Claims

1. A water wash flotation tank characterized in that, Including the tank body, the tank body is provided with stirring main shaft inside; The tank body is provided with inlet one and inlet two, the inlet one is used for fly ash slurry feeding, the inlet two is used for waste oil feeding; The stirring main shaft is provided with flotation scraper, the flotation scraper is used for mixing waste oil and activated carbon foam mixture; The tank body is provided with discharge port one near the height of the flotation scraper, the discharge port one is used for waste oil and activated carbon foam mixture discharge.

2. The water wash flotation tank of claim 1, wherein, The tank body is provided with overflow control angle, the liquid level in the tank body is set at 50mm below the overflow control angle.

3. The water wash flotation tank of claim 1, wherein, The tank body is provided with discharge port two, the discharge port two is used for supernatant discharge.

4. The water wash flotation tank of claim 1, wherein, The bottom of the stirring main shaft is provided with bottom scraper.

5. The water wash flotation tank of claim 1, wherein, The bottom of the tank body is provided with discharge port three, the discharge port three is used for washing fly ash slurry discharge.

6. The water wash flotation tank of claim 1, wherein, One end of the flotation scraper is square sheet, the other end is circular arc.

7. The water wash flotation tank of claim 1, wherein, The ratio of fly ash and water in the fly ash slurry is 1:

3.

8. The water wash flotation tank of claim 2, wherein, The overflow control angle includes tank body part and inclination part, the inclination part is set to be inclined downward.

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