CN209098368U - A high-concentration sewage treatment air flotation equipment - Google Patents

Abstract

The utility model relates to a kind of high-concentration sewages to handle airfloat equipment, including pond body, interconnected contact chamber and separation chamber are equipped in pond body, further include being connected to contact chamber for launching the adding of agent mouth of flocculant or coagulant, is additionally provided with the release for discharging dissolved air water and the agitating device for stirring liquid in contact chamber.The high-concentration sewage processing airfloat equipment wadding body of the utility model is not easy, sewage treating efficiency is high.

Description

A high-concentration sewage treatment air flotation equipment

technical field

The utility model relates to an air flotation device for sewage treatment, in particular to an air flotation device for high-concentration sewage treatment.

Background technique

In the water supply and drainage treatment process, the solid and liquid separation technology and its equipment are one of the key items. Conventional air flotation is mainly used for the separation of suspended matter with a density similar to that of water, and the treatment of wastewater with poor sedimentation performance of the suspended matter.

The main working principle of conventional air flotation is to dissolve air and water into the water to the greatest extent under certain pressure and conditions, and then release the pressure of the formed pressure-dissolved water through the dissolved air releaser arranged in the contact chamber. , a large number of microbubbles are rapidly generated. These microbubbles fill the contact chamber to form "white water" similar to milk. Sewage produces "flocs" under the chemical action of flocculants and coagulants, commonly known as "alum flowers". "Flocs" flow into the mixing and contact chamber inside the air flotation tank with the water flow, where they bond with a large number of micro-bubbles to form "air-stained flocs" (the outer surface of the flocs is covered with air bubbles), and its apparent density is lower than that of water, " The air-dipped flocs quickly rise to the water surface, and the suspended matter condenses on the liquid surface to form scum, and the purpose of solid-liquid separation is achieved by scraping the scum. The surface load of conventional load air flotation can be 2～7M ³ /M ² /h. Therefore, the conventional air flotation design has an external dimension of 10000×3800 when the processing capacity is 100 tons/hour, which has reached the limit of transportation and cannot be enlarged any more. According to the design specification, the aspect ratio in the separation zone reaches 1:2 or even 1: 3 There is little or no dissolved gas and water at the end of the separation zone. Therefore, the effluent treatment effect is also poor. Conventional air flotation has low efficiency and poor water discharge effect, and can only achieve 100 tons/hour. Air flotation equipment exceeding this value cannot be transported due to its large size. In terms of conventional air flotation treatment capacity, the density of suspended solids in the influent water is within 1000 mg/L. If the concentration of pollutants in the influent water exceeds this value, the treatment capacity cannot reach 100 tons/hour, and can only be reduced to 60-70 tons/hour.

At present, in the industrial wastewater market, there are many wastewaters with a flow rate of more than 300 tons/hour and influent suspended solids exceeding 3000 mg/L. Conventional air flotation needs to be equipped with 4 sets of 100 tons/hour air floats, which increases the cost and cost of sewage treatment equipment. Therefore, it is necessary to develop a high-efficiency dissolved air flotation with a processing flow rate of more than 300 tons/hour and a suspended solids of more than 3000 mg/L in the influent and a volume of 11000×3800 that can be transported to replace conventional air flotation. float.

At present, the factors that affect the treatment capacity of conventional air flotation include the dosing method of flocculants and coagulants. When the conventional load air flotation works, the sewage completes the chemical reaction in the mixing reaction zone outside the air flotation tank, and the reaction product is "flocculation". The "flocs" are transported to the contact chamber through structural parts such as pipes, and the "flocs" and tiny air bubbles interact and bond together in the contact chamber to form "air-stained flocs". During this process, tiny air bubbles are adhered to the outside of the body of the "floc". The number of air bubbles and the firmness of the bonding are determined by the water quality and the composition of the agent. So different water quality will have different effects. Because the particle size of "flocs" is very different, the speed of particles floating is very different, so the apparent density of "air-dipped flocs" varies greatly. Some rise quickly, some very slowly. In addition, the water flow disturbance in the separation zone will make the air bubbles outside the "air-dipped flocs" fall off again, causing the flocs to flow out with the water flow in the water body. Make the effluent worse and fail to meet the owner's treatment requirements.

In view of the above-mentioned defects, the inventors of the present invention have actively carried out research and innovation, in order to create a new type of high-concentration sewage treatment air flotation equipment, which has more industrial value.

Utility model content

In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a high-concentration sewage treatment air flotation device with which the flocs are not easy to sink and the sewage treatment efficiency is high.

The high-concentration sewage treatment air flotation device of the utility model comprises a pool body, wherein the pool body is provided with a contact chamber and a separation chamber which are communicated with each other, and also includes a medicament feeding port which is communicated with the contact chamber and is used for feeding flocculant or coagulant. , the contact chamber is also provided with a releaser for releasing dissolved gas water and a stirring device for stirring liquid.

Preferably, in the high-concentration sewage treatment air flotation equipment of the present invention, the stirring device includes a driving motor arranged on the tank body, a connecting shaft connected to the output shaft of the driving motor, and a stirring blade arranged on the connecting shaft and located in the contact chamber.

Preferably, in the high-concentration sewage treatment air flotation equipment of the present invention, one end of the pool body is provided with a sewage pool, the middle of the pool body is provided with a sewage water inlet pipe that communicates with the sewage pool, and the two ends of the pool body are symmetrically provided with contact chambers And the separation chamber, the sewage water inlet pipe is connected with the contact chamber through the sewage water distribution pipe, the bottom of the contact chamber is provided with a water distribution plate, the surface of the water distribution plate is provided with a plurality of water distribution holes, and the outlet end of the sewage water distribution pipe is located below the water distribution plate.

Preferably, in the high-concentration sewage treatment air flotation equipment of the present invention, a releaser is also arranged in the separation chamber.

Preferably, in the high-concentration sewage treatment air flotation equipment of the present invention, one end of the pool body is provided with a bubble generator, and the output end of the bubble generator is communicated with the releaser through a pipeline.

Preferably, in the high-concentration sewage treatment air flotation equipment of the present invention, a clean water collection device is provided at the bottom of the separation chamber. The clean water collection device includes a main pipe and a collection assembly symmetrically arranged at both ends of the main pipe. The collection assembly includes one end that communicates with the main pipe and the other end The main pipe communicated with the connecting pipe, the upper and lower ends of the connecting pipe are respectively symmetrically provided with two branch pipes located on the left and right sides of the connecting pipe, and the branch pipes are provided with water collecting holes.

With the above solution, the present invention has at least the following advantages: the high-concentration sewage treatment air flotation equipment of the present invention is filled with small bubbles smaller than micron level released by the releaser in the contact chamber area. Because the total number of bubbles is very large, it appears to be poured into this area like a glass of milk. The coagulant and sewage react chemically under the action of the stirring device to produce "flocs". During the growth process of "flocs" from small to large, the surrounding tiny air bubbles will gradually "envelope" inside the "flocs". Forms a floc with air in the body. Referred to as "air-filled flocs". The particle size of "air-inclusion flocs" is larger than that of conventional air flotation, and its body contains air bubbles, and its overall apparent density is much smaller than that of water. The purpose of solid-liquid separation is achieved by scraping the scum into scum.

In conclusion, the flocs of the high-concentration sewage treatment air flotation equipment of the present invention are not easy to sink, and the sewage treatment efficiency is high.

The above description is only an overview of the technical solution of the present utility model. In order to understand the technical means of the present utility model more clearly, and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the present utility model and the accompanying drawings as follows: back.

Description of drawings

Fig. 1 is the structural representation of the high-concentration sewage treatment air flotation equipment of the present invention;

Figure 2 is a schematic top view of a high-concentration sewage treatment air flotation device, wherein parts such as a slag scraper are not shown;

Figure 3 is a schematic structural diagram of the sewage water distribution pipe, water distribution plate and other structures in the tank body;

Fig. 4 is the top view schematic diagram of sewage water distribution pipe, water distribution plate and other structures and sewage pool;

Fig. 5 is the structural representation of clear water collecting device;

FIG. 6 is a partial enlarged view of part A in FIG. 1 .

In the figure, 1: tank body; 2: contact chamber; 3: separation chamber; 4: chemical injection port; 5: releaser; 6: drive motor; 7: connecting shaft; 8: stirring blade; 9: sewage pool ;10: Sewage inlet pipe; 11: Sewage water distribution pipe; 12: Water distribution plate; 13: Water distribution hole; 14: Bubble generator; 15: Main pipe; 16: Collection component; 17: Main pipe; 18: Branch pipe; hole; 20: connecting pipe.

Detailed ways

The specific embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

Referring to FIGS. 1 to 6 , a high-concentration sewage treatment air flotation device according to a preferred embodiment of the present invention includes a pool body 1, and the pool body is provided with a contact chamber 2 and a separation chamber 3 that communicate with each other, and also includes a contact chamber 2 and a separation chamber 3 that communicate with each other. The chamber is connected to a medicament feeding port 4 for feeding flocculant or coagulant, and the contact chamber is also provided with a releaser 5 for releasing dissolved gas water and a stirring device for stirring liquid.

Specifically, the medicament feeding port may be a pipe port of a pipe whose top end protrudes from the liquid level of the contact chamber, and the bottom end of the pipe is located at the bottom of the contact chamber.

The air flotation equipment for high-concentration sewage treatment is filled with small air bubbles smaller than micron level released by the releaser in the contact chamber area. Because the total number of bubbles is very large, it appears to be poured into this area like a glass of milk. The coagulant and sewage react chemically under the action of the stirring device to produce "flocs". During the growth process of "flocs" from small to large, the surrounding tiny air bubbles will gradually "envelope" inside the "flocs". Forms a floc with air in the body. Referred to as "air-filled flocs". The particle size of "air-inclusion flocs" is larger than that of conventional air flotation, and its body contains air bubbles, and its overall apparent density is much smaller than that of water. The purpose of solid-liquid separation is achieved by scraping the scum into scum.

The high-concentration sewage treatment air flotation equipment produces "air-inclusion flocs" in the mixed contact area. The tiny air bubbles are "wrapped" inside the "floc". The number of bubbles "wrapped" inside the "air-entrained flocs" is much more than the "air-impregnated flocs" produced by conventional load flotation. The reliability of "air-entrained flocs" is also better than that of "air-impregnated flocs" produced by conventional air flotation. The apparent density of "air-entrained flocs" is also much smaller than that of "air-impregnated flocs". The difference in the rising speed of the two in the air flotation separation area is very large, so the air flotation efficiency of the high-concentration sewage treatment air flotation equipment is very high, and one can be used as four conventional air flotations.

Based on the above description, the surface load of air flotation equipment for high-concentration sewage treatment can reach 12-20M3/M2/h. The surface load of conventional dissolved air flotation can only achieve 3 ~ 7M3/M2/h. The difference between the two is 3 to 5 times. The high-concentration sewage treatment air flotation equipment on the floor area is 1/3 to 1/5 of the conventional load air flotation.

Preferably, in the high-concentration sewage treatment air flotation equipment of the present invention, the stirring device includes a driving motor 6 arranged on the tank body, a connecting shaft 7 connected to the output shaft of the driving motor, and a stirring paddle arranged on the connecting shaft and located in the contact chamber. Leaf 8.

Preferably, in the high-concentration sewage treatment air flotation equipment of the present invention, one end of the pool body is provided with a sewage pool 9, the middle part of the pool body is provided with a sewage water inlet pipe 10 that communicates with the sewage pool, and both ends of the pool body are symmetrically provided with The contact chamber and the separation chamber, the sewage water inlet pipe is communicated with the contact chamber through the sewage water distribution pipe 11, the bottom of the contact chamber is provided with a water distribution plate 12, the surface of the water distribution plate is provided with a plurality of water distribution holes 13, and the outlet end of the sewage water distribution pipe is located on the water distribution plate below.

The shape of the conventional air flotation tank is generally rectangular, and the aspect ratio is mostly 3:1, and some even reach 5:1. The water inlet method is generally the short side of the water, and the water flows along the long side to the opposite short side. The water flow flows to the end of the tank body along the long side direction. In the process of scraping the slag with this type of pool structure, due to the long distance, too much scum falls to the bottom of the pool along the way, which will seriously affect the quality of the effluent. The high-concentration sewage treatment air flotation equipment changes the water inlet mode to the water inlet in the middle of the pool body, which is divided into two parts through the pipeline and enters the contact chambers at both ends. This improvement is equivalent to splitting the conventional dissolved air flotation in two from the middle. The conventional dissolved air flotation separation zone is divided into two parts, and the flow distance of sewage and flocs in the separation zone is shortened by half.

The water distribution plate is equipped with water distribution holes of different sizes according to the size of the water head, so that the water flow in the contact room can rise evenly.

Preferably, in the high-concentration sewage treatment air flotation equipment of the present invention, a releaser is also arranged in the separation chamber.

Preferably, in the high-concentration sewage treatment air flotation device of the present invention, a bubble generator 14 is provided at one end of the pool body, and the output end of the bubble generator is communicated with the releaser through a pipeline.

The shape of the conventional air flotation tank is generally rectangular, and the aspect ratio is mostly 3:1, and some even reach 5:1. The water inlet method is generally the short side of the water, and the water flows along the long side to the opposite short side. The water flow flows to the end of the tank body along the long side direction. In the process of scraping the slag with this type of pool structure, due to the long distance, too much scum falls to the bottom of the pool along the way, which will seriously affect the quality of the effluent. The high-concentration sewage treatment air flotation equipment changes the water inlet mode to the water inlet in the middle of the pool body, which is divided into two parts through the pipeline and enters the contact chambers at both ends. This improvement is equivalent to splitting the conventional dissolved air flotation in two from the middle. The conventional dissolved air flotation separation zone is divided into two parts, and the flow distance of sewage and flocs in the separation zone is shortened by half.

The water distribution plate is equipped with water distribution holes of different sizes according to the size of the water head, so that the water flow in the contact room can rise evenly.

Preferably, in the high-concentration sewage treatment air flotation equipment of the present invention, a clean water collecting device is provided at the bottom of the separation chamber. The clean water collecting device includes a main pipe 15 and a collection assembly 16 symmetrically arranged at both ends of the main pipe. The collecting assembly includes one end that communicates with the main pipe, The other end of the main pipe 17 communicates with the connecting pipe 20. The upper and lower ends of the connecting pipe are symmetrically provided with two branch pipes 18 located on the left and right sides of the connecting pipe respectively, and the branch pipes are provided with water collecting holes 19.

The overall length of the clean water collection device used in the high-concentration sewage treatment air flotation equipment is only half of the conventional air flotation, so it greatly avoids the unevenness of the water volume caused by the pressure loss of the holes. The collected clean water is transported by a T-shaped pipe. The advantage is to increase the pressure head of the entire water collection system, which can greatly improve the uniformity of water collection in the entire water collection system, so that the entire separation area can collect clean water evenly over the entire area, without short-circuiting, which will cause local hydraulic loads. If it is too large, it will affect the floating of "air-entrained flocs", and even directly bring the flocs out, which will affect the water effluent effect in serious cases.

For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that those skilled in the art can implement the present invention in other specific forms without departing from the spirit or essential characteristics of the present invention. Utility model. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the protection scope of the present invention is defined by the appended claims rather than the foregoing description.

In addition, the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principles of the present invention, the Several improvements and modifications are made, and these improvements and modifications should also be regarded as the protection scope of the present invention. At the same time, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. a kind of high-concentration sewage handles airfloat equipment, including pond body, interconnected contact chamber and separation chamber are equipped in pond body, It is characterized by also including being connected to contact chamber for launching the adding of agent mouth of flocculant or coagulant, gone back in contact chamber Equipped with the release for discharging dissolved air water and the agitating device for stirring liquid.

2. high-concentration sewage according to claim 1 handles airfloat equipment, it is characterised in that: the agitating device includes setting In in pond body driving motor, with driving motor output shaft connection connecting shaft, set on connecting shaft and be located at contact indoor stir Mix blade.

3. high-concentration sewage according to claim 1 handles airfloat equipment, it is characterised in that: one end of the pond body is arranged Have a cesspool, the middle part of pond body is equipped with the sewage water inlet pipe being connected to cesspool, the both ends of pond body be symmetrically equipped with contact chamber and Separation chamber, the sewage water inlet pipe are connected to by sewage sparge pipe with the contact chamber, and the bottom of contact chamber is provided with water dispensing board, The surface of the water dispensing board is equipped with multiple distributing holes, and the water outlet of the sewage sparge pipe is located at the lower section of the water dispensing board.

4. high-concentration sewage according to claim 1 handles airfloat equipment, it is characterised in that: be also provided in the separation chamber There is release.

5. high-concentration sewage according to claim 4 handles airfloat equipment, it is characterised in that: one end of pond body is equipped with bubble The output end of generator, the bubble generator is connected to by pipeline with the release.

6. high-concentration sewage according to claim 1 handles airfloat equipment, it is characterised in that: the bottom of the separation chamber is set There is clear water collection device, the clear water collection device includes general pipeline and the collection assembly for being symmetrically set in the both ends general pipeline, the collection Component includes the supervisor that one end is connected to general pipeline, the other end is connected to connecting tube, and the upper and lower ends of the connecting tube are respectively symmetrically Ground is equipped with two branch pipes being located at left and right sides of connecting tube, and the branch pipe, which is equipped with, receives water hole.