CN201128697Y - Membrane method bubble-free aerator - Google Patents

Abstract

The membrane method bubble-free aerator belongs to the technical field of sewage treatment equipment, including a bubble-free aeration diaphragm group, a liquid oxygenation circulation system, an air supply system, an online ultrasonic cleaning system for the diaphragm, an electrical control system, a base and a bracket; The bubble-free aeration diaphragm group is installed and fixed in the water tank of the liquid oxygenation circulation system, and the liquid oxygenation circulation system, air supply system, diaphragm online ultrasonic cleaning system, and electrical control system are respectively installed and fixed on the bracket and machine base. The utility model has the characteristics of high degree of automation, high efficiency of dissolved oxygen, low energy consumption, low cost and thorough online membrane cleaning.

Description

Membrane method bubble-free aerator

technical field

The utility model relates to a membrane method bubble-free aerator, which belongs to the technical field of sewage treatment equipment.

Background technique

The scarcity of water resources is the basic national condition of our country. With the sustained and rapid development of the national economy, the shortage of water resources and the pollution of the environment by industrial wastewater and domestic sewage have become more and more important issues to be solved urgently. For this reason, my country will integrate environmental governance and environmental Protection is included in the legal management system as a basic national policy. It has also become one of the important tasks of governments at all levels to increase revenue and reduce expenditure and control pollution. Therefore, it is urgent to look forward to the innovative development and application of sewage resource treatment and reuse technology and equipment suitable for the development of the times and in line with my country's national conditions, so as to alleviate the shortage of water resources and protect the environment. Since the 1980s, people have been exploring and researching the problem of sewage treatment and reuse. Among them, the research, development and application of new processes and technologies for sewage biological treatment have been rapidly developed around the world, and many new sewage biological treatment process technologies have emerged. For example, activated sludge method, contact oxidation method, oxidation ditch method, facultative hydrolysis process and the combination of the above processes, etc. Most of these technologies have been widely used in engineering practice in various parts of our country. At present, the commonly used sewage treatment technologies mainly include "activated sludge method", etc., but these methods have disadvantages such as low treatment efficiency and high energy consumption. Most of the existing sewage treatment adopts the secondary treatment process, that is, the sewage is drained after passing through the coarse screen, the water collection adjustment tank, the grit chamber, the flocculation sedimentation tank, the activated sludge aeration tank, and the secondary sedimentation tank.

The core treatment unit of the activated sludge sewage treatment process is the activated sludge aeration tank (aerobic oxidation reaction tank). It uses bubble aeration to enhance the dissolution of oxygen into the sludge mixture, which is used by aerobic microorganisms to degrade organic matter in sewage. It is easy to remove the soluble and fast-degradable COD in sewage, but it is difficult to remove the COD caused by insoluble and insoluble substances. In order to remove this part of COD, it must be aerated for a long time. The land area, infrastructure investment and operating costs have greatly increased. In the bubble aeration method commonly used at present, both perforated aeration and microporous aeration have many disadvantages: (1) The bubble aeration method uses the continuous generation of bubbles to expand the size of the bubbles and The contact time and area of the liquid can increase the concentration of dissolved oxygen in the water liquid, but due to the effect of air bubbles and liquid interface resistance, the oxygen utilization efficiency is low and the energy consumption is high; (2) The activated sludge aeration tank contains volatile or sewage containing sulfur compounds, due to the strong bubble aeration, the volatile gas rises to the water surface and then enters the air, causing air pollution and resulting in incomplete treatment; (3) In addition to the above-mentioned bubble aeration method In addition to the shortcomings of the "membrane oxygenation device" that we have declared (patent application number: 200720019241.6), it has been found through practice that the hollow fiber membrane is not cleaned online, which affects its oxygen dissolution performance and application efficiency. Cylindrical membrane modules have disadvantages such as high cost.

Contents of the invention

Aiming at the technical defects of the above existing products, the utility model provides a membrane method bubble-free aerator with high degree of automation, high efficiency of dissolved oxygen, low energy consumption, low cost, and thorough online membrane cleaning.

A membrane method bubble-free aerator, including a bubble-free aeration membrane group, a liquid oxygenation circulation system, an air supply system, an online ultrasonic cleaning system for the membrane, an electrical control system, a machine base and a bracket; the bubble-free aeration membrane The film group is installed and fixed in the water tank of the liquid oxygenation circulation system, and the liquid oxygenation circulation system, air supply system, diaphragm online ultrasonic cleaning system, and electrical control system are respectively installed and fixed on the bracket and machine base.

The bubble-free aeration membrane group is the core component of the membrane-type bubble-free aerator, and its structure is a curtain-shaped submerged type. Each membrane is composed of tens to hundreds of hollow fiber membranes to form fiber bundles, and is composed of Composed of a number of fiber bundles, each fiber bundle is bonded to a special pipe fitting through epoxy resin glue, the upper and lower ends are symmetrical, and the structure is the same; the center hole of each hollow fiber membrane and the center hole of the special pipe fitting are vertically intersected and communicated to form a diaphragm inlet and outlet channels.

The liquid oxygenation circulation system is composed of a sewage pump, a solenoid valve, a circulating water tank, a manual stop valve and corresponding pipelines. The sewage pump is installed and fixed on the machine base, and the circulating water tank is installed and fixed on the bracket above the machine base. The solenoid valve, A manual shut-off valve is installed on the system piping.

The air supply system is composed of an air compression pump, an air processor, a pressure gauge, a throttle valve and corresponding pipelines. The air compression pump and the air processor are respectively installed and fixed on the base, and the air outlet of the air compression pump is equipped with For the air processor, a throttle valve is installed on the pipeline after the compressed air passes through the diaphragm group, which is used to adjust the working pressure of the compressed air in the system, and a pressure gauge is installed at the front and rear ends of the ventilation pipeline connected to the diaphragm group.

The diaphragm on-line ultrasonic cleaning system is composed of a cleaning pump, an ultrasonic transducer, a solenoid valve, a cleaning water tank, a liquid level gauge, a respirator, a sewage valve and corresponding pipelines. The lower part of the water tank, the cleaning water tank is installed and fixed on the bracket above the base, and the cleaning liquid inlet and outlet pipelines of the cleaning pump are equipped with four solenoid valves that control the flow direction conversion of the cleaning liquid between the cleaning tank and the circulating water tank. It is equipped with a liquid level gauge, a respirator, and a drain valve; there are also green, yellow, and red signal lights on the top of the cleaning water tank.

The electrical control system is composed of two parts, the control box and the electrical component box, which are installed in the bracket on the machine base. The control box is equipped with pressure gauges, control buttons, indicator lights and microcomputer controllers; the electrical component box is equipped with Power electrical components, ultrasonic generators, PLC controllers and electrical protection components.

The innovation of the utility model mainly contains the following five aspects:

1. Using polymer strong hydrophobic hollow fiber membrane material and its gas separation characteristics to make a curtain-shaped submerged membrane module to achieve the purpose of large membrane surface area per unit volume, high gas flux of the membrane, and low manufacturing price. At the same time, the membrane fiber can float in the circulating water tank with the water flow during use, which can effectively improve the mass transfer process of the liquid phase and reduce the pollution of sediments on the outer surface of the membrane.

2. The application of bubble-free oxygenation technology not only solves the secondary air environmental pollution caused by bubble aeration, but also greatly improves the efficiency of liquid oxygen dissolution. It is suitable for bubble-free oxygenation in aquaculture, industrial wastewater and domestic sewage treatment of various water depths. Membrane bubble-free aerator is completely different from other traditional aeration equipment, which must generate bubbles and contact with liquid to carry out oxygenation. It can achieve 100% dissolved oxygen rate, which is 8 times higher than that of bubble oxygenation. above.

3. The liquid oxygenation circulation system of the utility model adopts a self-overflow return water design, which can realize the oxygenation effect on the liquid to the greatest extent. The liquid to be treated enters from the bottom of the circulating water tank through the sewage pump, reaches the top of the water tank on the water surface and enters the return pipe by self-overflow, and then is discharged into the aeration tank. The inner water flow is relatively gentle, which increases the oxygenation time of the liquid and is conducive to the full oxygenation of the liquid.

4. The online cleaning system of this utility model adopts the ultrasonic cleaning design, which effectively solves the technical problem of incomplete online cleaning of the membrane module, and can maintain the good gas separation characteristics of the hollow fiber membrane for a long time, thereby realizing its long-term oxygenation capacity.

5. There is no phase change of any materials during the operation of the utility model, and the application of microcomputer control in electrical control has a high degree of automation, which can minimize energy consumption, save electricity by more than 60%, and can greatly reduce waste water treatment. Cost, in order to improve the economic and social benefits of operating enterprises.

The membrane method bubble-free aerator of the utility model is realized through the following measures:

Bubble-free aeration diaphragm group: This piece is the core component of the membrane-type non-bubble aerator. Its structure is a curtain-shaped submerged type, and its function is to conditionally separate the oxygen in the air and dissolve it into its surroundings. in liquid.

Liquid oxygenation circulation system: the function is to provide a certain flow rate of treated liquid to be pumped out from the aeration tank through the circulating water tank for oxygenation and then return to the aeration tank to realize liquid circulation. The solenoid valve a is used to control the backflow of the liquid in the circulating water tank and facilitate the connection between the pump and the water tank; the solenoid valve b is used to control the liquid in the circulating water tank to be fully discharged before the diaphragm group is cleaned; the manual stop valve is used to control the liquid in the circulating water tank Liquid discharge and easy connection of pipelines.

Air supply system: the function is to provide air with a certain flow rate and pressure to pass through the diaphragm assembly to realize oxygenated air supply. The air processor is used to filter the compressed air and heat the working environment when the temperature is too low; the throttle valve is used to adjust the working pressure of the compressed air in the system; the pressure gauge is used to monitor the gas pressure before and after the diaphragm group.

Diaphragm online ultrasonic cleaning system: the function is to provide a certain amount of cleaning liquid into the circulating water tank, and turn on the ultrasonic cleaning of the diaphragm assembly to realize online cleaning of the outer surface of the diaphragm assembly, so as to maintain the good gas separation characteristics of the diaphragm assembly. After cleaning the diaphragm assembly, turn on the pump set and switch the corresponding solenoid valve again, and pump the cleaning liquid back into the cleaning tank. The cleaning tank is also equipped with a liquid level gauge, a respirator, and a drain valve, which are used to monitor the amount of cleaning liquid, the normal entry and discharge of cleaning liquid, and the discharge of cleaning liquid after contamination.

Electrical control system: the role is to provide automatic control of the liquid oxygenation circulation system, air supply system, and diaphragm online ultrasonic cleaning system. The system is divided into two parts, the control box and the electrical component box. The pressure gauge, control button, indicator light, microcomputer controller on the control box and the power electrical components, ultrasonic generator, PLC controller, etc. in the electrical component box form a complete electrical control system.

In addition, there are also green, yellow and red signal lights to indicate the operating status of each system.

working principle:

The utility model can realize automatic operation, and can also realize individual control according to each system, respectively start and coordinate operation. The automatic operation mode and the individual control operation mode are switched and controlled by a transfer switch.

1. Automatic operation mode: each system operates automatically under the control of the microcomputer controller according to the set operation program. Press the start button, the liquid oxygenation circulation system is turned on, and the liquid to be treated starts to be pumped into the circulation water tank. After about 5 minutes, the air supply system is automatically opened to supply compressed air to the diaphragm assembly. The gas pressure is adjusted by the manual throttle valve. The whole equipment enters the normal operation state. At this time, the solenoid valve a is opened, the solenoid valve b is closed, and the green signal is on; under the control of the microcomputer setting program, after the equipment runs for 23 hours in 24 hours, the liquid oxygenation circulation system and the air The supply system stops running automatically, and the diaphragm on-line ultrasonic cleaning system turns on the ultrasonic cleaning to start working. At this time, the solenoid valves c and f are opened, and the solenoid valves d and e are closed. After cleaning for 1 hour, the solenoid valves c and f are closed, the solenoid valves d and e are opened, the cleaning liquid is pumped from the circulating water tank back to the cleaning tank, and the yellow signal lights up; a working cycle is completed and the next working cycle is automatically entered. During the operation, if there are failures such as system pressure rise, motor overload, pipeline blockage, etc., the electrical control system will automatically cut off the power supply and give an alarm, and the red signal light will be on at this time.

2. Independent control operation mode: Each system is started by manual control. When you want to start any system, you can manually press the corresponding button to start it.

The utility model has the characteristics of high degree of automation, high efficiency of dissolved oxygen, low energy consumption, low cost and thorough online membrane cleaning.

Description of drawings

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

Fig. 2 is the rear view of the utility model.

Fig. 3 is a working principle diagram of the utility model.

Fig. 4 is a schematic structural diagram of the diaphragm assembly of the present invention.

Among them: 1. Circulating water tank, 2. Diaphragm assembly, 3. Throttle valve, 4. Breather, 5. Cleaning box, 6. Signal light, 7. Liquid level gauge, 8. Drainage valve, 9. Electrical control box, 10. Engine base, 11. Cleaning pump, 12. Air processor, 13. Air compressor pump, 14. Sewage pump, 15. Solenoid valve (a, b, c, d, e, f), 16. Ultrasonic transducer Device, 17. Manual shut-off valve, 18. Electrical component box, 19. Bracket, 20. Pressure gauge, 2-1. Special fittings for diaphragm assembly, 2-2. Hollow fiber membrane, 2-3. Epoxy resin, A. Sewage inlet, B. Treated sewage outlet.

Detailed ways

Example:

The structure of the utility model is shown in Figures 1 to 4, including a bubble-free aeration diaphragm group, a liquid oxygenation circulation system, an air supply system, an online ultrasonic cleaning system for the diaphragm, an electrical control system, a base and a bracket, etc.; The bubble-free aeration diaphragm group is installed and fixed in the water tank of the liquid oxygenation circulation system, and the liquid oxygenation circulation system, air supply system, diaphragm online ultrasonic cleaning system, and electrical control system are respectively installed and fixed on the bracket and machine base.

The bubble-free aeration membrane group is the core component of the utility model, and its shape is a curtain-shaped submerged type. Each membrane group 2 is composed of tens to hundreds of hollow fiber membranes 2-2 to form fiber bundles, and is composed of Composed of several fiber bundles, each fiber bundle is bonded to the special pipe fitting 2-1 through epoxy resin glue 2-3, the upper and lower ends are symmetrical, and the structure is the same. The central hole of each hollow fiber membrane 2-2 and the central hole of the special pipe fitting 2-1 vertically intersect and communicate with each other, forming the air inlet and outlet channels for the membrane.

The liquid oxygenation circulation system is composed of a sewage pump 14, solenoid valves 15 (a, b), a circulating water tank 1, a manual stop valve 17 and corresponding pipelines. The sewage pump 14 is installed and fixed on the support 10 , and the circulating water tank 1 is installed and fixed on the support 19 above the support 10 . Solenoid valve 15 (a, b) and manual cut-off valve 17 are housed in its system pipeline.

The air supply system is composed of an air compression pump 13, an air handler 12, a pressure gauge 20 (two in total), a throttle valve 3 and corresponding pipelines. The air compression pump 13 and the air processor 12 are respectively installed and fixed on the base 10, the air outlet of the compressed air is equipped with the air processor 12, and the throttle valve 3 is installed on the pipeline, before and after the connection between the ventilation pipeline and the diaphragm group. The end is equipped with a pressure gauge 20.

The diaphragm on-line ultrasonic cleaning system consists of cleaning pump 11, ultrasonic transducer 16, electromagnetic valve 15 (c, d, e, f), cleaning tank 5, liquid level gauge 7, respirator 4, blowdown valve 8 and Corresponding pipeline composition. Cleaning pump 11 is installed in the bottom of cleaning box 5 by its connecting pipeline suspended in the air. The cleaning box 5 is installed and fixed on the support 19 above the support 10 the same as the circulating water tank 1 . Four electromagnetic valves 15 (c, d, e, f) are housed on the cleaning liquid inlet and outlet pipeline of cleaning pump 11, and liquid level gauge 7, respirator 4, drain valve 8 are also housed on cleaning box 5.

The electrical control system The electrical control system is composed of two parts, the control box 9 and the electrical component box 18 . They are installed vertically side by side in the bracket 19 on the machine base 10 . Control box 9 is equipped with pressure gauge, control button, indicator light and microcomputer controller etc., and electrical component box 18 is equipped with power electrical components, ultrasonic generator, PLC controller and electrical protection element etc., and the top of cleaning box 5 is equipped with Green, yellow and red signal lights 6.

Claims (6)

1, a kind of embrane method bubble-free aeration machine is characterized in that, comprises bubble-free aeration diaphragm group, the liquid oxygen charging recycle system, air supply system, the online ultrasonic cleaning system of diaphragm, electric control system, support and support; Bubble-free aeration diaphragm group is fixed in the water tank of the liquid oxygen charging recycle system, and the liquid oxygen charging recycle system, air supply system, the online ultrasonic cleaning system of diaphragm, electric control system are fixed on respectively on support, the support.

2, embrane method bubble-free aeration machine as claimed in claim 1, it is characterized in that, described bubble-free aeration diaphragm group is the core component of embrane method bubble-free aeration machine, its structure is a curtain shape immersion, each diaphragm is formed fibrous bundle by tens of extremely hundreds of hollow-fibre membranes, and is made up of some fibrous bundles, and each fibrous bundle is by epoxy resin glue and special pipe fitting bonding, two ends symmetry up and down, structure is identical; The centre hole of every hollow-fibre membrane and the centre hole of special pipe fitting intersect vertically and communicate, and constitute diaphragm-operated air inlet and outlet passageway.

3, embrane method bubble-free aeration machine as claimed in claim 1, it is characterized in that, the described liquid oxygen charging recycle system is made up of sump pump, magnetic valve, cyclic water tank, hand stop valve and corresponding pipeline, sump pump is fixed on the support, cyclic water tank is fixed on the support above the support, and magnetic valve, hand stop valve are installed on the system pipeline.

4, embrane method bubble-free aeration machine as claimed in claim 1, it is characterized in that, described air supply system is made up of air compressor pump, air processor, tensimeter, throttling valve and respective line, air compressor pump, air processor are fixed on the support respectively, air processor is equipped with in the air outlet of air compressor pump, on the pipeline of pressurized air after throttling valve is installed by the diaphragm group, be used for the pneumatically operated pressure of regulation system, with the front and back end that the diaphragm group is connected tensimeter be housed at vent line.

5, embrane method bubble-free aeration machine as claimed in claim 1, it is characterized in that, the online ultrasonic cleaning system of described diaphragm is by scavenging pump, ultrasonic transducer, magnetic valve, clean water tank, liquidometer, respiratory organ, wash water valve and respective line are formed, scavenging pump is by the unsettled bottom of cleaning water tank that is installed in of its connecting pipeline, cleaning water tank is fixed on the support above the support, the scavenging solution of scavenging pump is imported and exported the magnetic valve that the flow direction conversion of four control scavenging solutions between cleaning case and cyclic water tank is housed on the pipeline, and liquidometer also is housed on the cleaning case, respiratory organ, wash water valve; At the top of cleaning water tank green, yellow, red trichromatism signal lamp is housed also.

6, embrane method bubble-free aeration machine as claimed in claim 1, it is characterized in that, described electric control system is made up of controlling box and electric elements case two portions, and their are listed as in the support that is installed on the support, and controlling box is equipped with tensimeter, push button, pilot lamp and microcomputer controller; The electric elements case is equipped with power electric elements, ultrasonic generator, PLC controller and electric prospection element.

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