Pulsed aeration head and method of use, membrane module and wastewater treatment method

Abstract

The present application belongs to the field of membrane module, and particularly relates to a pulse type aeration head, a using 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 a partition; each aeration chamber is provided with a pulse generator; 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 communicated with an air outlet hole arranged on the aeration disc. The pulse aeration head can realize the pulse type aeration effect, and realize the high intensity scouring effect under low air volume; the pulse aeration head can realize the high efficient dissolved oxygen efficiency; the pulse aeration head will not cause the problems of air flow affected by dirt blocking and the like; and the pulse aeration head can be used in the fields of air scrubbing process of the membrane module, aerobic and oxidized dissolved oxygen process and the like.

Description

Technical Field

[0001] This invention belongs to the field of membrane modules, specifically relating to a pulse aeration head and its usage method, membrane modules, and wastewater treatment methods. Background Technology

[0002] Aeration devices are a common method in water treatment to effectively bring air into contact with water. Their purpose varies depending on the application. In aerobic processes, aeration dissolves oxygen from the air into the water, increasing the dissolved oxygen concentration. In membrane separation processes, aeration utilizes the buoyancy of air bubbles to drive water flow, continuously scouring the hollow fiber membrane fibers under the combined force of the gas and liquid flow, effectively removing activated sludge from their surface. However, regardless of the method or purpose of aeration, current technologies suffer from numerous problems, including high energy consumption, internal clogging, unsatisfactory aeration effects, and short lifespan. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pulse aeration head and its usage method, a membrane module and a wastewater treatment method.

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

[0005] A pulse aeration head includes an aeration head, an air inlet chamber disposed within the aeration head, and a plurality of pulse generators disposed within the aeration head; the aeration head is divided into a plurality of aeration chambers by a partition; a pulse generator is disposed in each of the aeration chambers; a plurality of air distribution holes are disposed 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 an air outlet hole disposed on the aeration disc.

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

[0007] The aeration disc is arc-shaped.

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

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

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

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

[0012] 1) Connect and fix one aeration head and multiple pulse generators to complete the assembly; preferably, this is done by ultrasonic welding or glue.

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

[0014] 3) The compressed space collects the air into the air intake chamber through the air inlet. As compressed air enters the air intake chamber, it is collected. The sewage in the air intake chamber is squeezed out through the air distribution hole, 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 hole, the compressed air overflows through the air distribution hole and rises to be collected in the corresponding aeration chamber.

[0016] 5) As compressed air continuously flows into the air distribution holes, the wastewater 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 at the same time, a siphon effect is generated on 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 by sewage as the compressed air in the aeration chamber decreases, completing one pulse process;

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

[0020] The present invention also includes a membrane module, comprising a membrane module body and an aeration device disposed below the membrane module body; the aeration device includes an air inlet pipe and a plurality of pulse aeration heads connected to the air inlet pipe.

[0021] The membrane module body is either a pressure-type membrane module or an immersion membrane module.

[0022] The present invention also includes a wastewater treatment method using the membrane module described above.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] The pulse aeration head of the present invention can achieve pulse aeration effect and achieve high-intensity scouring effect at low air volume; it can achieve high dissolved oxygen efficiency; it will not cause problems such as fouling that affect airflow; it can be used in the air scrubbing process of membrane modules, aerobic and oxidative dissolved oxygen processes, etc.

[0025] Using the pulse aeration head in wastewater treatment can replace existing aeration methods such as perforated aeration pipes and aeration discs. While reducing the air volume by 1 / 3, it can improve the water flowability and increase the dissolved oxygen concentration in the water, ensuring that it reaches 5-7 mg / L. Attached Figure Description

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

[0027] Figure 2 This is a top view of the pulse aeration head of the present invention.

[0028] Figure 3 This is a schematic cross-sectional view of the pulse aeration head of the present invention;

[0029] Figure 4 This is a schematic diagram of the airflow direction of the pulse aeration head of the present invention;

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

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0032] Figure 1-4 This diagram illustrates a pulse-type aeration head, comprising an aeration head 1, an air inlet chamber 3 disposed within the aeration head, and multiple pulse generators 2 disposed within the aeration head. The aeration head is divided into multiple aeration chambers by a partition. Each aeration chamber contains a pulse generator 2. Multiple air distribution holes 4 are provided on the air inlet chamber. One end of each pulse generator is located at the highest point of the aeration chamber as an air inlet 5, and the other end communicates with an air outlet 6 provided on an aeration disc. Each air distribution hole corresponds one-to-one with an aeration chamber. The aeration disc is arc-shaped. The pulse generators are V-shaped or L-shaped. The air inlet chamber 3, air distribution holes 4, aeration chambers, pulse generators 2, and air outlets 6 sequentially form an airflow channel. The size of the aeration chamber varies depending on the application scenario, with a typical volume of 0.2-4L.

[0033] The method of using the pulse aeration head specifically includes the following steps:

[0034] 1) Connect and fix one aeration head 1 and multiple pulse generators 2 to each other by ultrasonic welding or glue to complete the assembly;

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

[0036] 3) The compressed space is collected in the air inlet 3 through the air inlet. As compressed air continuously enters the air inlet, the sewage in the air inlet is squeezed out through the air distribution hole 4 and the liquid level in the air inlet also drops.

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

[0038] 5) As compressed air continuously flows into the air distribution holes, the wastewater 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 in the diagram, as excess air overflows, it creates a siphon effect on the air in the aeration chamber, instantly releasing the air from the aeration chamber to complete the aeration process.

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

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

[0042] Figure 5 A membrane module is shown, including a membrane module body 8 and an aeration device disposed below the membrane module body; the aeration device includes an air inlet pipe 7 and a plurality of pulse-type aeration heads connected to the air inlet pipe; the membrane module body is a pressure-type membrane module or a submerged membrane module. A permeate pipe 9 is disposed above the membrane module.

[0043] Wastewater treatment using the membrane module described above showed that it can replace existing aeration methods such as perforated aeration pipes and aeration discs. While reducing the amount of air by 1 / 3, it can improve the fluidity of the water and increase the dissolved oxygen concentration of the water, ensuring that it reaches 5-7 mg / L.

[0044] In summary, the pulse aeration head of the present invention can achieve pulse aeration effect and high-intensity scouring effect at low air volume; it can achieve high dissolved oxygen efficiency; it will not cause problems such as fouling that affect airflow; it can be used in the air scrubbing process of membrane modules, aerobic and oxidative dissolved oxygen processes, etc.

[0045] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within 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 disposed within the aeration head, and multiple pulse generators disposed within the aeration head; the aeration head is divided into multiple aeration chambers by a partition; each aeration chamber is provided with a pulse generator; multiple air distribution holes are provided 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 an air outlet on the aeration disc; the aeration disc is arc-shaped; The air distribution holes correspond one-to-one with the aeration chambers; the air inlet chamber, air distribution holes, aeration chambers, pulse generator, and air outlet holes sequentially form an airflow channel; The method of using the pulse aeration head includes the following steps: 1) Connect and fix one aeration head and multiple pulse generators to complete the assembly; 2) Fix the assembled pulse aerator head to the pipe of the air inlet network through the lower air inlet; 3) Compressed air is collected in the intake chamber through the air inlet. As the compressed air enters the intake chamber and is collected, the sewage in the intake chamber is squeezed out through the air distribution hole and the liquid level in the intake chamber also drops. 4) When the compressed air level in the air inlet chamber drops to the air distribution hole, the compressed air overflows through the air distribution hole and rises to be collected in the corresponding aeration chamber. 5) As compressed air continuously flows into the air distribution holes, the wastewater 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 at the same time, a siphon effect is generated on 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 by sewage as the compressed air in the aeration chamber decreases, completing one pulse process; As compressed air is continuously injected into the aeration chamber through the air distribution holes, steps 5)-7) are repeated, thus achieving a pulse aeration process at certain intervals.

2. The pulse aeration head of claim 1, wherein The pulse generator is either V-type or L-type.

3. The pulse aerator head of claim 1, wherein, The volume of the aeration chamber is 0.2-4L.

4. The pulse aerator head of claim 1, wherein, In step 1), the assembly is completed by connecting and fixing the parts using ultrasonic welding or glue.

5. A membrane module characterized by, It includes a membrane module body and an aeration device disposed below the membrane module body; the aeration device includes an air inlet network and a plurality of pulse aeration heads as described in any one of claims 1-4 connected to the air inlet network.

6. The membrane module according to claim 5, characterized in that, The membrane module body is either a pressure-type membrane module or an immersion membrane module.

7. A wastewater treatment method, characterized in that, Use the membrane module as described in claim 5 or 6.

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