CN100450940C - High-concentration biochemical aerator - Google Patents

Abstract

The present invention discloses a high concentration biochemical aerator which comprises a pump, an inlet pipe, an outlet pipe, a gas-water mixing tube and a nozzle, and is fixed connected in an order of a gas-water mixing tube, a first compression pipe, a second expanding-contracting pipe, a gas-water spreading pipe and a nozzle, wherein the middle parts of the first compression pipe and the second expanding-contracting pipe are contracted, while the two ends of which have a bell-mouthed shape. The liquid level of the biochemical tank is generally more than 8 m, and the volume of the biochemical tank is increased, so that the travel of the air microbubble is doubled and the oxygen utilization ratio is up to 60% which is four times larger than that of the prior art, besides the generated biochemical sludge welters in the tank, and the investment is saved. The noise is low, so that rigorous soundproof device is not needed. The operation is convenient, the maintenance cost is low and the maintenance time is 90% shorter than that of the blower. The removal percentage is high and the removing effect is stable for removing CODcr and BOD5 from water.

Description

High concentration biochemical aerator

1. Technical field:

The high-concentration biochemical aerator of the present invention relates to the technical field of sewage treatment, in particular to the technical field of oxygenation devices, and is applied to sewage treatment projects, biochemical pools, regulating pools, etc. for oxygenation.

2. Background technology

At present, the biochemical oxygenation devices in sewage treatment projects all use blower devices, which generally exist: the general water level of the blower oxygenation is 4m~5m. If the pressure of the blower is not enough, its oxygenation stroke is short. Press down several pieces and put them together to form large bubbles with lighter specific gravity. The oxygen molecules in the oxygenation will quickly surface, resulting in waste of energy; Power consumption doubles the operating cost; due to the use of a blower, it must be equipped with an aeration head to supply air to a large area. It is carried out under the condition of removing the liquid in the sewage tank, resulting in long pipeline repair time, high maintenance cost and high maintenance technical requirements, which directly affects the use efficiency.

3. Contents of the invention:

The object of the present invention is to overcome above-mentioned defect, adopt the method of air-water mixing, air-water compression, air-water diffusion, design a kind of high-concentration biochemical aerator with pump as power source. Its technical solution is realized as follows: it includes a sludge pump, a sludge pump inlet pipe and a sludge pump outlet pipe whose inlet is located at the bottom of the biochemical tank, and is characterized in that it also includes negative pressure chambers that are fixedly connected in sequence from top to bottom , air-water mixing pipe, primary compression pipe, secondary expansion pipe, air-water diffusion pipe, nozzle at the bottom of the pool, the lower end of the air-water diffusion pipe is provided with a nozzle, and the output port of the sludge pumping pipe is connected to the negative pressure chamber top. There are 4 to 15 nozzles at the lower end of the air-water diffusion pipe, which are arranged in a plum blossom shape. The nozzles at the bottom of the pool are within the range of 1 to 3 nozzles. The obvious effect after the implementation of this technology is: the liquid level of the biochemical pool is generally above 8m, which increases the volume of the biochemical pool, doubles the stroke of air microbubbles, increases the utilization rate of oxygen, and makes water and air form primary dissolved air. shape, so that the oxygen in the air penetrates into the activated sludge layer, achieves the slow separation of mud, water and gas, fully improves the uniformity of dissolved oxygen, and improves the transfer rate and utilization rate of oxygen up to 45%. The gas is more than 4 times that of the tank. Due to the installation of the nozzle jet and a counter to the bottom of the pool, all the biochemical sludge is turned in the pool. There is no need to set up vertical, horizontal, pipes and aeration heads at the bottom of the pool, saving investment. Make sure that the upper, middle and lower parts of the biochemical pool are free from bad expansion of sludge due to lack of oxygen. Due to the use of water pumps as power, low noise, no need for strict sound insulation settings, easy operation, low maintenance costs, maintenance period is 90% less than that of blowers, high removal rate of CODcr, BOD ₅ in water, and stable removal effect.

4. Description of drawings:

Fig. 1 is the sectional structure schematic diagram of the present invention,

Among them, 1-negative pressure chamber, 1-1-air channel, 2-air-water mixing tube, 3-primary compression tube, 4-secondary expansion tube, 5-air-water diffusion tube, 6-nozzle, 7-pool bottom Nozzle, 8-sludge layer, 9-biochemical pool, 10-sludge pump, 10-1-sludge pump inlet pipe, 10-2-sludge pump outlet pipe.

5. Specific implementation methods:

Take the 8m pool as an example below in conjunction with accompanying drawing, the present invention will be further described:

As shown in Figure 1, the high-concentration biochemical aerator is installed in the 8m-deep biochemical tank 9, the sludge pump 10 and the sludge pump inlet pipe 10-1 enter the sludge layer 8 of the biochemical tank 9, and the sludge pump 10 pumps out the pipe 10-2 Connect the negative pressure chamber 1, the side of the negative pressure chamber 1 is provided with an air channel 1-1, the lower end of the negative pressure chamber 1 is connected to the air-water mixing pipe 2, the primary compression pipe 3, the secondary compression pipe 4, and the air-water diffusion pipe 5 The sequence is fixedly connected, and the lower end side of the air-water diffusion pipe 5 is provided with 4 spouts 6 evenly arranged on the circumference, and 1 spout 7 at the bottom of the pool faces the bottom of the pool.

As shown in Fig. 1, power on, sludge pump 10 starts, the mixture of sludge and sewage continuously pumped enters the negative pressure chamber 1 through the sludge pump inlet pipe 10-1, the sludge pump 10, and the sludge pump outlet pipe 10-2, The mixture of sludge and sewage is diffused in the negative pressure chamber 1 to form a negative pressure. The air enters the negative pressure chamber 1 through the air channel 1-1, and the mixture of sludge and sewage enters the air-water mixing pipe 2 for mixing. The final mixture enters the primary compression tube 3 for contraction and expansion, and then enters the secondary expansion tube 4 for secondary contraction and expansion. 6. One spout 7 at the bottom of the pool sprays out evenly, and the spout 7 at the bottom of the pool rolls the sludge in the sludge layer 8 without sedimentation for circular work; the mixture of sludge and sewage and the suction air are expanded and contracted through the 8m pipeline, Scattered aeration is sprayed at the bottom of the pool, with a spray distance of 2m, and the sprayed water and air form a primary dissolved air form, so that the oxygen in the air penetrates into the activated sludge layer, achieving slow separation of mud, water, and air, and fully improving Oxygen transfer rate and utilization rate, to achieve the purpose of sewage treatment.

Claims (3)

1. A high-concentration biochemical aerator comprises a sludge pump (10), a sludge pump inlet pipe (10-1) at the bottom of the biochemical tank, and a sludge pump outlet pipe (10-2), characterized in In that: it also includes a negative pressure chamber (1), an air-water mixing pipe (2), a primary compression pipe (3), a secondary expansion pipe (4), and an air-water diffusion pipe (5) fixedly connected in sequence from top to bottom. ), the spout (7) at the bottom of the pool, the primary compression tube (3) and the secondary expansion tube (4) are all contracted in the middle, and the two ends are a bell-shaped structure; the lower end of the air-water diffusion tube (5) A spout (6) is provided, and the output port of the sludge pumping pipe (10-2) is connected to the top of the negative pressure chamber (1). 2. The high-concentration biochemical aerator according to claim 1, characterized in that 4 to 15 nozzles (6) are arranged at the lower end of the air-water diffusion pipe (5), arranged in a plum blossom shape. 3. The high-concentration biochemical aerator according to claim 1, characterized in that: the nozzles (7) at the bottom of the pool are within the range of 1-3.

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