CN201058829Y - A high-efficiency sewage treatment gas mixing device - Google Patents

Abstract

The utility model provides a simple and high-efficiency gas-liquid mixing device for continuously generating fine air bubbles, which is used in aeration systems for sewage or waste water treatment, fish ponds and other occasions. It includes a gas introduction component 1, a gas-water mixing component 2, and a bubble decompression refinement component 3. The raw water to be treated introduces air or oxygen into the water at the jet nozzle of the gas introduction part; the gas and water are uniformly mixed through the gas-water mixing part; and then passes through the secondary rotary decompression bubble release device to mix very fine bubbles into the raw water .

Description

A high-efficiency sewage treatment gas mixing device

technical field

The utility model relates to water treatment technology, to be precise, it is a high-efficiency sewage treatment aeration device, which can generate fine air bubbles in water during the aeration process of sewage or industrial waste water and fish ponds, thereby increasing the Rotary Mixed Aeration Device for Dissolved Oxygen.

Background technique

For domestic sewage and industrial wastewater treatment, the most effective method to remove organic matter in water is biochemical method. At present, methods such as contact oxidation and activated sludge commonly used in biochemical methods all need to diffuse and transport air into the sewage through aeration to oxygenate and increase the dissolved oxygen in the water. Dissolved oxygen is required to maintain microbial metabolism in activated sludge and to promote the formation of new biofilms by microorganisms that contact the walls of the oxidized filler. Biochemical sewage treatment is to use microbial bacteria to metabolize and reproduce organic matter in sewage as nutrients to degrade organic pollutants and purify water, that is, biodegradation technology. In addition, artificially cultured fish and shrimp and other aquatic products must also increase dissolved oxygen into the pond through aeration to maintain the survival needs of aquatic organisms. Therefore, the aeration and diffusion technology that evenly mixes air or oxygen into the water plays an extremely important role in sewage treatment and aquaculture.

In the past, the mixed air aeration methods in water mainly include blast aeration, high-speed stirring aeration, and jet dissolved air. Blast aeration is to use the blower to diffuse the gas-phase fluid into the water through the aeration head arranged at the end of the pipeline to produce a three-dimensional continuous gas-liquid contact interface, which is the main way of aeration. However, if the pores of the aeration head are too large, the generated bubbles will be large and affect the gas-liquid contact area. If the pores are too small, the pressure resistance will increase and the power consumption will be increased, and it will be easily blocked, making maintenance difficult; Uniform flaky bubbles are not ideal; while the efficiency of direct jet dissolved air is low, and the number of bubbles produced is small and not dense.

Contents of the invention

The purpose of the utility model is to provide a gas-liquid mixing device that is simple, cheap, low in energy consumption, high in reliability and capable of continuously generating fine air bubbles, aiming at the deficiencies of the existing aeration equipment.

The utility model is technically realized in the following manner. The raw water to be treated is pressurized by the water pump and enters a pipe with a diameter ranging from thick to thin. The water flows faster in the thin pipe and forms a negative pressure with the atmosphere. A conduit communicating with the atmosphere is provided at the expanded part of the thin pipe outlet, and under the action of negative pressure, the air is naturally sucked into the raw water. The water dissolved in the air is collided, disturbed and blocked by the mixer to form tiny bubbles, and then through the decompression, diversion and swirl of the two-stage rotating decompression bubble release device, a mist-like gas-liquid containing fine bubbles is formed mixed with water. When the gas-liquid mixed water enters the pool, the fine bubbles diffuse and rise to contact the water with a large specific surface area, effectively increasing the dissolved oxygen in the water.

The utility model is an efficient sewage treatment gas mixing device, which is characterized in that the components include a gas introduction component 1, a gas-water mixing component 2 and a bubble decompression and refinement component 3.

The gas introduction component 1 is a circular tubular body. The raw water injected by the water pump enters the jet flow area 16 through the threaded pipe connection chamber 14 and the variable diameter chamber 15; The raw water is in the negative pressure area at the expansion chamber 17, and the air or oxygen is sucked into the raw water through the inlet pipe nozzle 12.

The air-water mixing assembly 2 is a circular tube-type device with threaded pressure caps at both ends, and the pressure caps 23 and 28 connect the connecting pipes 13 and 39 through sealing rings 24 and 27; the air-water mixing assembly 2 is placed inside Mixer 25 and first-stage rotary decompression bubble release device 26 .

The air-water mixer 25 is a round tube whose inner surface is processed into a plurality of discontinuous thread-like protrusions 21, and the round tube is packed into the inside of the air-water mixer 25.

Rotating decompression bubble release device, inside the circular tube with the same diameter as the air-water mixer 25, two or more fan blade-shaped fins 22 are welded, and the height of the fins exceeds the center line.

The air bubble decompression refinement assembly 3 is a round pipe 32 clamped by two flanges, and a second-stage rotating decompression air bubble release device 37 is placed inside the round pipe; The bolts are clamped securely.

The gas mixing device provided by the utility model is structurally mainly composed of a gas introduction component, a gas-water mixing component, and a bubble decompression and refinement component. The raw water to be treated introduces air or oxygen into the water at the jet nozzle of the gas introduction part; the gas and water are uniformly mixed through the gas-water mixing part; and then passes through the secondary rotary decompression bubble release device to mix very fine bubbles into the raw water . Below in conjunction with accompanying drawing, the utility model is described further.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Gas introduction component 1; gas-water mixing component 2; bubble decompression refinement component 3; air intake pipe 11; air intake pipe nozzle 12; connecting pipes 13, 39, 35; Cavity 17; threaded protrusions 21; fins 22, 36; pressure caps 23, 28; sealing rings 24, 27; air-water mixer 25; decompression bubble release devices 26, 37; 32; bolts 34, 38;

Fig. 2 is a schematic diagram of a specific embodiment of the present invention.

Pool 51; water inlet pipe 52; high-efficiency sewage treatment gas mixing device 53; water pump 54; water outlet pipe 55; dissolved air water 56; water distribution pipe 57

In the gas mixing device provided by the utility model, the gas introduction component 1 , the gas-water mixing component 2 and the air bubble decompression refinement component 3 are three parts that are combined together and independent of each other. Raw water is pressurized and lifted by the water pump, and enters the gas introduction component 1. The internal connection cavity 14 of the component transitions through the variable diameter chamber 15, and the diameter becomes thinner at the jet area 16, and the diameter reduction ratio is between 5:1-3:1. The flow velocity of water increases in the jet flow area, and the increase value is inversely proportional to the square of the diameter change, and the high flow velocity area is negative pressure relative to the atmosphere. Raw water is decompressed at the expansion chamber 17, where an inlet pipe 11 communicating with the atmosphere or an oxygen cylinder is set, and air or oxygen is sucked into the raw water through the nozzle 12 of the inlet pipe.

The gas introduction component 1 and the gas-water mixing component 2 are connected through a connecting pipe 13 . The water dissolved in the gas collides and stirs with the threaded protrusion 21 at a high speed in the gas-water mixer 25 to form a turbulent flow state and form a uniform gas-water mixture containing tiny bubbles. Pressure caps 23 and 28 seal both ends of the mixing assembly through seal rings 24 and 27 . A rotating decompression bubble release device 26 is also installed in the air-water mixing assembly 2 , which is a circular pipe section whose outer diameter is movably matched with the inner diameter of the air-water mixing assembly 2 . At least two fan blade-like fins 22 are welded on its inner surface, the height of the fins exceeds the center line, and there must be a certain distance between the two fins in the axial direction, which is more than twice the geometric dimension of the fins. Prevent clogging from happening. The air-mixed water is in contact with the fins, and under the action of diversion and swirl of the fins, the fluid form is changed after rotation and decompression. The swirling effect makes the bubbles dissolved in the water accelerate toward the pipe wall along the diameter direction, and after colliding with the pipe wall at high speed, the bubbles are further refined and the water flow is rotated; the blocking effect of the fins reduces the pressure of the water flow by about 0.1-0.3Mpa , the pressure drop makes the air bubbles in the water mist and become finer.

Through the connecting pipe 39 , the gas-water mixture enters the decompression refinement assembly 3 . One end of the connecting pipe 39 is connected with the air-water mixing assembly 2 with the pressure cap 28, and the other end is connected with the flange through threads. A circular tube 32 is clamped between two flanges, and a second-stage rotating decompression air bubble release device 37 is placed inside the circular tube. Decompression effect. The two flanges are clamped and fixed with bolts. The aerated water that comes out through the connecting pipe 39 can be introduced into an aeration tank, an air flotation tank or a pond, and has a high oxygen content and a large amount of fine air bubbles.

The high-efficiency sewage treatment gas mixing device provided by the utility model has a unique structural design. Due to the use of various structural effects and large hole exhaust, the pressure loss is small and the power consumption is small, and it is not easy to block. Its structure is simple and easy to install, and at the same time, bulky air compression and gas storage equipment can be saved, and the practical effect is obvious.

Detailed ways

Fig. 2 is a schematic diagram of a specific embodiment of the present invention.

The water pump 54 absorbs water from the pool 51 through the water inlet pipe 52 and enters the high-efficiency sewage treatment aeration device 53 provided by the utility model. The outlet pressure of the water pump is not less than 0.4Mpa. The aeration water after passing through the aeration device 53 is connected with the water distribution pipe 57 through the water outlet pipe 55 . The length of the water distribution pipe depends on the length of the pool. The water distribution pipe is from near to far away from the outlet pipe, and according to the diameter from small to large, a row of holes is opened at a certain distance, and the diameter of the smallest hole is not less than 5mm to avoid blockage. The water distribution pipe 57 is not less than 100mm away from the bottom of the pool, and the opening is downward so that the sludge will not immerse in the water distribution pipe during pump stop. Connect multiple water distribution pipes in parallel to make the water distribution in the whole pool even. A water retaining weir is arranged near the water inlet of the water pump in the pool, and its function is to prevent the dissolved air water from entering the water pump to cause cavitation. After adding the air mixing device, very fine air bubbles can be seen on the surface of the dissolved air water 56, and the dissolved oxygen value in the water has increased by 87%.

Claims (5)

1. a high-efficiency sewage is handled gas mixing device, it is characterized in that, introduces assembly (1), air water electric hybrid module (2) and bubble decompression refinement assembly (3) by gas and forms; Gas is introduced the helicitic texture of assembly (1) by pipe connecting (13) and pressure cap (23), is connected with air water electric hybrid module (2); The screw thread of the other end of air water electric hybrid module (2) by pressure cap (28), and pipe connecting (39), flange (31) link to each other with bubble decompression refinement assembly (3).

2. gas mixing device according to claim 1 is characterized by: it is a round tubular body that gas is introduced assembly (1), and the former water that water pump is squeezed into enters fluerics (16) by threaded tube connection chamber (14), reducing chamber (15); The inlet pipe (11) that communicates with atmosphere or oxygen cylinder is established in the exit, fluerics, and the negative pressuren zone that the former water of mobile is located at expansion cavity (17) is drawn into air or oxygen in the former water by inlet pipe nozzle (12).

3. gas mixing device according to claim 1 is characterized by: air water electric hybrid module (2) is the tubular type device of the threaded pressure cap in two ends, and pressure cap (23) and (28) are tightly connected pipe connecting (13) and (39) by sealing-ring (24) and (27); Gas-water mixer (25) and first step rotation decompression bubble releasing device (26) are placed in the inside of air water electric hybrid module (2).

4. gas mixing device according to claim 3 is characterized by: gas-water mixer (25) is the pipe that an internal surface is processed into many discontinuous screw shape projectioies (21), pipe gas-water mixer (25) inside of packing into.

5. gas mixing device according to claim 3 is characterized by: rotation decompression bubble releasing device, with the isodiametric pipe of gas-water mixer (25) inside, weld two or more fan blade shape fins (22), fin height surpasses medullary ray.

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