Pulse type aeration head, use method, membrane module and sewage treatment method

Abstract

The invention belongs to the field of membrane modules, and particularly relates to a pulse type aeration head, a use method, a membrane module and a sewage treatment method. The pulse type aeration head comprises an aeration head, an air inlet chamber arranged in the aeration head and a plurality of pulse generators arranged in the aeration head; the aeration head is divided into a plurality of aeration chambers by partition plates; a pulse generator is arranged in each aeration chamber; a plurality of air distribution holes are formed in the air inlet chamber; one end of the pulse generator is positioned at the highest position of the aeration chamber, and the other end of the pulse generator is communicated with an air outlet hole formed in the aeration disc. The pulse aeration head disclosed by the invention can realize a pulse type aeration effect, and can realize a high-strength flushing effect under a low air flow; high dissolved oxygen efficiency can be realized; the problem that air flow is influenced by dirt blockage is avoided; the method can be used in the fields of gas scrubbing process of the membrane module, aerobic and oxidized oxygen dissolving process and the like.

Description

Technical Field

[0001] The invention belongs to the field of membrane components, and in particular relates to a pulse aeration head and a use method thereof, a membrane component and a sewage treatment method. Background Art

[0002] Aeration devices are a common method for effectively contacting air with water in the field of water treatment. The purpose of aeration devices varies according to different application scenarios. For example, in aerobic process scenarios, aeration is to dissolve oxygen in the air into water and increase the concentration of dissolved oxygen in the water. In membrane separation process scenarios, aeration uses the buoyancy of bubbles in the water to drive the flow of water. Under the action of gas and liquid two-phase flow, the hollow fiber membrane is continuously flushed, thereby effectively removing the activated sludge attached to the surface of the hollow fiber membrane. Regardless of the aeration method or the purpose of aeration, the prior art has many problems such as high energy consumption of aeration devices, internal fouling, unsatisfactory aeration effect, and short life of aeration devices. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a pulse aeration head and a method of using the same, a membrane assembly and a sewage treatment method.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A pulse aeration head comprises an aeration head, an air inlet chamber arranged in the aeration head and a plurality of pulse generators arranged in the aeration head; the aeration head is divided into a plurality of aeration chambers by a partition; a pulse generator is arranged in each aeration chamber; a plurality of air distribution holes are arranged on the air inlet chamber; one end of the pulse generator is located at the highest position of the aeration chamber, and the other end is connected to the air outlet hole arranged on the aeration disk.

[0006] The air distribution holes correspond to the aeration chambers one by one.

[0007] The aeration plate is arc-shaped.

[0008] The pulse generator is V-shaped or L-shaped.

[0009] The air inlet, air distribution holes, aeration chamber, pulse generator and air outlet holes sequentially form an air flow channel.

[0010] The volume of the aeration chamber is 0.2-4L.

[0011] The present invention also includes a method for using the pulse aeration head, comprising the following steps:

[0012] 1) Connect and fix an aeration head and multiple pulse generators to complete the assembly; preferably, ultrasonic welding or gluing

[0013] 2) Fix the assembled pulse aeration head to the pipe of the air inlet network through the air inlet at the lower end;

[0014] 3) The compressed space is collected in the air intake chamber through the air inlet. As the compressed air enters the air intake chamber and is collected, the sewage in the air intake chamber is squeezed out through the air distribution holes and the liquid level in the air intake chamber also drops;

[0015] 4) When the compressed air level in the air inlet chamber drops to the air distribution holes, the compressed air overflows through the air distribution holes and rises to be collected in the corresponding aeration chamber.

[0016] 5) As compressed air continuously flows into the air holes, the sewage in the aeration chamber is squeezed out by the compressed air;

[0017] 6) When the compressed air level in the aeration chamber drops to the lowest point of the pulse aeration structure, the excess air is overflowed and a siphon effect is generated for the air in the aeration chamber, instantly releasing the air in the aeration chamber to complete the aeration process;

[0018] 7) As the compressed air in the aeration chamber is released, it is refilled with sewage as the compressed air in the aeration chamber decreases, completing a pulse process;

[0019] As compressed air is continuously injected into the aeration chamber through the air holes, steps 5-7 are repeated, thereby achieving a pulse aeration process at regular intervals.

[0020] The present invention also includes a membrane assembly, including a membrane assembly body and an aeration device arranged below the membrane assembly body; the aeration device includes an air inlet mesh pipe and a plurality of pulse aeration heads connected to the air inlet mesh pipe;

[0021] The membrane assembly body is a pressure membrane assembly or an immersed membrane assembly.

[0022] The invention also comprises a sewage treatment method using the membrane assembly.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The pulse aeration head of the present invention can achieve a pulse aeration effect and a high-intensity flushing effect at a low gas volume; it can achieve a high dissolved oxygen efficiency; there will be no problems such as fouling and blockage that affect the airflow; it can be used in the fields of air scrubbing process of membrane components, aerobic and oxidative dissolved oxygen processes, etc.

[0025] The pulse aeration head used in sewage treatment can replace existing aeration methods such as perforated aeration tubes and aeration disks, while reducing the gas volume by 1 / 3 to improve the fluidity of the water body and increase the dissolved oxygen concentration of the water body, ensuring that it reaches 5-7 mg / l. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the main structure of the pulse aeration head of the present invention;

[0027] Figure 2 It is a schematic diagram of the top view of the pulse aeration head of the present invention;

[0028] Figure 3 It is a schematic diagram of the cross-sectional structure of the pulse aeration head of the present invention;

[0029] Figure 4 It is a schematic diagram of the air flow direction of the pulse aeration head of the present invention;

[0030] Figure 5 This is a schematic diagram of a membrane module using a pulse aeration head according to the present invention. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and the best embodiments.

[0032] Figure 1-4 A pulse aeration head is shown, comprising an aeration head 1, an air inlet chamber 3 arranged in the aeration head, and a plurality of pulse generators 2 arranged in the aeration head; the aeration head is divided into a plurality of aeration chambers by a partition; a pulse generator 2 is arranged in each aeration chamber; a plurality of air distribution holes 4 are arranged on the air inlet chamber; one end of the pulse generator is located at the highest position of the aeration chamber as an air inlet 5, and the other end is connected to an air outlet 6 arranged on the aeration disk. The air distribution holes correspond to the aeration chambers one by one. The aeration disk is arc-shaped. The pulse generator is V-shaped or L-shaped. The air inlet chamber 3, air distribution holes 4, aeration chamber, pulse generator 2, and air outlet 6 sequentially form an air flow channel. The size of the aeration chamber varies according to different application scenarios, and the general volume of the aeration chamber is 0.2-4L.

[0033] The method for using the pulse aeration head specifically comprises the following steps:

[0034] 1) An aeration head 1 and a plurality of pulse generators 2 are connected and fixed correspondingly by ultrasonic welding or gluing to complete the assembly;

[0035] 2) Fix the assembled pulse aeration head to the pipe of the air inlet network 7 through the air inlet at the lower end ( Figure 5 shown);

[0036] 3) The compressed air is collected in the air inlet chamber 3 through the air inlet. As the compressed air continues to enter the air inlet chamber, the sewage in the air inlet chamber is squeezed out through the air distribution holes 4 and the liquid level in the air inlet chamber also decreases;

[0037] 4) When the compressed air level in the air inlet chamber drops to the air distribution holes 4, the compressed air overflows through the air distribution holes 4 and rises to be collected in the corresponding aeration chamber. At this time, the air distribution holes 4 are controlled by the liquid level in the air inlet chamber 3, which can ensure that the air output of all the air distribution holes is basically uniform;

[0038] 5) As compressed air continuously flows into the air holes, the sewage in the aeration chamber is squeezed out by the compressed air;

[0039] 6) When the compressed air level in the aeration chamber drops to the lowest point H1 of the pulse aeration structure ( Figure 3 As shown, when the excess air is overflowed, a siphon effect is generated for the air in the aeration chamber, and the air in the aeration chamber is released instantly to complete the aeration process;

[0040] 7) As the compressed air in the aeration chamber is released, it is refilled with sewage as the compressed air in the aeration chamber decreases, completing a pulse process;

[0041] As compressed air is continuously injected into the aeration chamber through the air holes, steps 5-7 are repeated, thereby achieving a pulse aeration process at regular intervals.

[0042] Figure 5 A membrane module is shown, comprising a membrane module body 8 and an aeration device arranged below the membrane module body; the aeration device comprises an air inlet mesh pipe 7 and a plurality of pulse aeration heads connected to the air inlet mesh pipe; the membrane module body is a pressure membrane module or an immersed membrane module. A water production mesh pipe 9 is arranged above the membrane module.

[0043] The membrane assembly was used for sewage treatment, and the results showed that it can replace existing aeration methods such as perforated aeration tubes and aeration plates, and can increase the fluidity of the water body while reducing the gas volume by 1 / 3, and can also increase the dissolved oxygen concentration of the water body to ensure that it reaches 5-7 mg / l.

[0044] In summary, the pulse aeration head of the present invention can achieve a pulse aeration effect and a high-intensity flushing effect at a low gas volume; it can achieve a high dissolved oxygen efficiency; there will be no problems such as fouling and blockage that affect the airflow; it can be used in the fields of air scrubbing process of membrane components, aerobic and oxidative dissolved oxygen processes, etc.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A pulse aeration head, characterized in that: It includes an aeration head, an air inlet chamber arranged in the aeration head, and multiple pulse generators arranged in the aeration head; the aeration head is divided into multiple aeration chambers by a partition; each aeration chamber is provided with a pulse generator; the air inlet chamber is provided with multiple air distribution holes; one end of the pulse generator is located at the highest position of the aeration chamber, and the other end is connected to the air outlet hole provided on the aeration disk.

2. The pulse aeration head according to claim 1, characterized in that: The air distribution holes correspond to the aeration chambers one by one.

3. The pulse aeration head according to claim 1, characterized in that: The aeration plate is arc-shaped.

4. The pulse aeration head according to claim 1, characterized in that: The pulse generator is V-shaped or L-shaped.

5. The pulse aeration head according to claim 1, characterized in that: The air inlet, air distribution holes, aeration chamber, pulse generator and air outlet holes sequentially form an air flow channel.

6. The pulse aeration head according to claim 1, characterized in that: The volume of the aeration chamber is 0.2-4L.

7. A method for using the pulse aeration head according to any one of claims 1 to 6, characterized in that: The steps include: 1) Connect and fix an aeration head and multiple pulse generators to complete the assembly; preferably, by ultrasonic welding or gluing 2) Fix the assembled pulse aeration head to the pipe of the air inlet network through the air inlet at the lower end; 3) The compressed air is collected in the air inlet chamber through the air inlet. As the compressed air enters the air inlet chamber and is collected, the sewage in the air inlet chamber is squeezed out through the air distribution holes and the liquid level in the air inlet chamber also drops. 4) When the compressed air level in the air inlet chamber drops to the air distribution holes, the compressed air overflows through the air distribution holes and rises to be collected in the corresponding aeration chamber. 5) As compressed air continuously flows into the air holes, the sewage in the aeration chamber is squeezed out by the compressed air; 6) When the compressed air level in the aeration chamber drops to the lowest point of the pulse aeration structure, the excess air is overflowed and a siphon effect is generated for the air in the aeration chamber, instantly releasing the air in the aeration chamber to complete the aeration process; 7) As the compressed air in the aeration chamber is released, it is refilled with sewage as the compressed air in the aeration chamber decreases, completing a pulse process; As compressed air is continuously injected into the aeration chamber through the air holes, steps 5-7 are repeated, thereby completing a pulse aeration process at regular intervals.

8. A membrane module, characterized in that It comprises a membrane assembly body and an aeration device arranged below the membrane assembly body; the aeration device comprises an air inlet mesh pipe and a plurality of pulse aeration heads according to any one of claims 1 to 6 connected to the air inlet mesh pipe.

9. The membrane module according to claim 8, characterized in that The membrane assembly body is a pressure membrane assembly or an immersed membrane assembly.

10. A sewage treatment method, characterized in that: The membrane module according to claim 8 or 9 is used.

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