Multi-connected intelligent gas supply system

Abstract

The utility model relates to a multi-connected intelligent air supply system, which is characterized in that a plurality of magnetic suspension fans respectively supply air to a biochemical pool, an aerated grit chamber and a filter pool through a first output branch air pipe, a second output branch air pipe and a third output branch air pipe, and a flow switch on the first output branch air pipe feeds back flow in pipes to a controller; the controller controls the flow regulating valve to achieve precise gas supply to the biochemical pool, pressure switches on the second output branch gas pipe and the third output branch gas pipe feed pressure in the pipes back to the controller, and the controller controls the pressure reducing valve to achieve precise gas supply to the biochemical pool and the filter pool. The controller controls the stop valve on the third output branch air pipe to meet intermittent air supply to the filter tank, only one fan is started during working, and when the controller detects that the flow switch on the input branch air pipe at the outlet of the fan reaches the maximum load of the fan, the second fan and the stop valve corresponding to the second fan are turned on to supply air to the filter tank. According to the whole system, intelligent control over the three treatment ponds can be achieved only through one draught fan, and manpower and material resource cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas supply systems in sewage treatment plants, in particular to a multi-connected intelligent gas supply system. Background Art

[0002] Biochemical tanks, aerated grit chambers and filter tanks are three common facilities in sewage treatment plants. Among them, biochemical tanks use the life activities of microorganisms to convert soluble and partially insoluble organic matter in wastewater into harmless substances to purify water quality. Biochemical tanks are generally divided into anaerobic and aerobic zones. The aerobic zone requires uninterrupted and precise air supply to the microorganisms to ensure their efficient work; aerated grit chambers exist in the form of working corridors, and their main functions are aeration and grit settling. The corridor is set along the entire length of one side of the channel wall, and a series of An aeration device is installed, and a sand collecting hopper with a certain slope is set at the bottom. On the one hand, under the action of aeration, the heavier sand particles are deposited at the bottom. On the other hand, the sand suction pump in this corridor pumps the sand and water at the bottom of the pool to the sand-water separator as the traveling pump sand suction machine moves. The aerated sand settling tank is continuously supplied with air for 24 hours. The filter tank is used to remove fine suspended matter in the wastewater, especially some fine suspended particles and colloidal substances that cannot be removed by biochemical treatment and coagulation sedimentation. Air supply is also required during the backwashing process, but according to the nature of the work, it is intermittent air supply.

[0003] At present, sewage treatment plants generally have multiple biochemical pools, which require a large amount of air supply. Multiple magnetic levitation fans are often used for air supply, while aeration settling tanks and filter tanks require a smaller amount of air supply, and generally use separate Roots blowers for air supply. However, according to field experience, magnetic levitation fans have a large surplus of air volume and the fan air pressure is the highest in the whole plant, which can meet the air supply needs of any process section. Roots blowers are noisy, and the energy consumption and subsequent maintenance costs are relatively high. At the same time, the valves of each air supply system are manually controlled on site, which relies too much on human observation and on-site management. Therefore, how to combine the air supply systems of the three treatment pools and perform intelligent control to achieve the purpose of energy saving and consumption reduction has become a technical problem to be solved in the industry. Utility Model Content

[0004] To this end, the technical problem to be solved by the utility model is to overcome the problem in the prior art that the air supply of the biochemical tank, aerated grit tank and filter tank of the sewage treatment plant is independent of each other and has a low degree of intelligence, resulting in energy waste and increased equipment use costs and labor costs.

[0005] In order to solve the above technical problems, the utility model provides a multi-connected intelligent air supply system for centralized air supply to biochemical pools, aerated grit chambers and filter tanks, including:

[0006] A plurality of magnetic suspension fans, wherein the outlet of the magnetic suspension fans is provided with an input bronchial pipe, the input bronchial pipe is provided with a first stop valve and a first flow switch, and the plurality of magnetic suspension fans are arranged in parallel;

[0007] A main air pipe, the main air pipe being connected to the input bronchial pipes of the outlets of the plurality of magnetic suspension fans;

[0008] A first output bronchus, connected to one end of the main bronchus away from the input bronchus, a flow regulating valve and a second flow switch are sequentially arranged on the first output bronchus, and the first output bronchus leads to a biochemical pool;

[0009] A second output bronchus is also connected to one end of the main air pipe away from the input bronchus, a first pressure reducing valve and a first pressure switch are sequentially arranged on the second output bronchus, and the second output bronchus leads to an aeration grit chamber;

[0010] A third output bronchus is also connected to the end of the main air pipe away from the input bronchus, and a second stop valve, a second pressure reducing valve and a second pressure switch are sequentially arranged on the third output bronchus, and the third output bronchus leads to the filter tank;

[0011] A controller is connected to the multiple magnetic levitation fans, the first stop valve, the first flow switch, the flow regulating valve, the second flow switch, the first pressure reducing valve, the first pressure switch, the second stop valve, the second pressure reducing valve and the second pressure switch, the controller is used to read the data of the first flow switch and then control the opening and closing of the magnetic levitation fans and the first stop valve, the controller is also used to read the data of the second flow switch and then control the opening of the flow regulating valve, the controller is also used to read the data of the first pressure switch and then control the opening of the first pressure reducing valve, the controller is also used to read the data of the second pressure switch and then control the opening of the second pressure reducing valve, and the controller is also used to control the opening and closing of the second stop valve.

[0012] In one embodiment of the present utility model, a third stop valve is provided on the second output bronchus, and the third stop valve is also connected to the controller.

[0013] In one embodiment of the present invention, a plurality of the first output bronchus are provided, and the plurality of the first output bronchus are arranged in parallel.

[0014] The above technical solution of the utility model has the following advantages compared with the prior art:

[0015] The multi-connected intelligent air supply system described in the utility model utilizes a controller to realize the centralized and unified distribution of the air supply control process. The magnetic levitation fan draws air from the outside and supplies air to the biochemical pool through the first output bronchus. The second flow switch on the first output bronchus feeds back the gas flow in the pipeline to the controller in real time. The controller realizes precise air supply to the biochemical pool by controlling the flow regulating valve. At the same time, the magnetic levitation fan draws air from the outside and supplies air to the aeration sand settling tank through the second output bronchus. The first pressure switch on the second output bronchus feeds back the gas pressure in the pipeline to the controller in real time. The controller realizes precise air supply to the biochemical pool by controlling the first pressure reducing valve. The magnetic levitation fan also supplies air to the filter tank through the third output bronchus after drawing air from the outside. The third pressure switch on the third output bronchus feeds back the gas pressure in the pipeline to the controller in real time. Real-time feedback is given to the controller, and the controller realizes precise air supply to the filter tank by controlling the second pressure reducing valve. In addition, the controller satisfies the intermittent air supply to the filter tank according to the preset time setting and by controlling the second stop valve on the third output bronchus. There are multiple magnetic levitation fans, and only one of them can be started during operation. When the controller detects that the first flow switch on the input bronchus at the outlet of the magnetic levitation fan reaches the maximum load of the fan, the second magnetic levitation fan and the corresponding first stop valve are turned on. Conversely, when so much air is not needed, the first stop valves on the corresponding input bronchus are closed in turn and the magnetic levitation fan is turned off at the same time. The whole system realizes the intelligent control of three treatment pools using only one fan, which not only achieves the purpose of energy saving and consumption reduction, but also greatly improves the degree of intelligence and saves manpower and material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein

[0017] Figure 1 The utility model is a schematic diagram of the gas pipeline and circuit connection of the multi-connected intelligent gas supply system.

[0018] Explanation of the reference numerals in the drawings in the specification: 1. Biochemical pool; 2. Aerated grit chamber; 3. Filter tank; 4. Magnetic levitation fan; 5. Input bronchus; 6. First stop valve; 7. First flow switch; 8. Main air pipe; 9. First output bronchus; 10. Flow regulating valve; 11. Second flow switch; 12. Second output bronchus; 13. First pressure reducing valve; 14. First pressure switch; 15. Third output bronchus; 16. Second stop valve; 17. Second pressure reducing valve; 18. Second pressure switch; 19. Controller; 20. Third stop valve. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0020] Reference Figure 1 As shown, the utility model provides a multi-connected intelligent air supply system for centrally supplying air to a biochemical pool 1, an aerated grit chamber 2 and a filter tank 3, including:

[0021] A plurality of magnetic suspension fans 4, the outlet of the magnetic suspension fans 4 is provided with an input bronchial pipe 5, the input bronchial pipe 5 is provided with a first stop valve 6 and a first flow switch 7, and the plurality of magnetic suspension fans 4 are arranged in parallel;

[0022] A main air pipe 8, the main air pipe 8 is connected to the input bronchial pipe 5 of the outlets of the plurality of magnetic suspension fans 4;

[0023] A first output bronchus 9 is connected to an end of the main bronchus 8 away from the input bronchus 5. A flow regulating valve 10 and a second flow switch 11 are sequentially arranged on the first output bronchus 9. The first output bronchus 9 leads to the biochemical pool 1.

[0024] A second output bronchial pipe 12 is also connected to the end of the main air pipe 8 away from the input bronchial pipe 5. A first pressure reducing valve 13 and a first pressure switch 14 are sequentially arranged on the second output bronchial pipe 12. The second output bronchial pipe 12 leads to the aeration grit chamber 2.

[0025] A third output bronchus 15 is also connected to the end of the main air pipe 8 away from the input bronchus 5. A second stop valve 16, a second pressure reducing valve 17 and a second pressure switch 18 are sequentially arranged on the third output bronchus 15. The third output bronchus 15 leads to the filter tank 3;

[0026] The controller 19 is connected to multiple magnetic levitation fans 4, a first stop valve 6, a first flow switch 7, a flow regulating valve 10, a second flow switch 11, a first pressure reducing valve 13, a first pressure switch 14, a second stop valve 16, a second pressure reducing valve 17 and a second pressure switch 18. The controller 19 is used to read the data of the first flow switch 7 and then control the opening and closing of the magnetic levitation fan 4 and the first stop valve 6. The controller 19 is also used to read the data of the second flow switch 11 and then control the opening of the flow regulating valve 10. The controller 19 is also used to read the data of the first pressure switch 14 and then control the opening of the first pressure reducing valve 13. The controller 19 is also used to read the data of the second pressure switch 18 and then control the opening of the second pressure reducing valve 17. The controller 19 is also used to control the opening and closing of the second stop valve 16.

[0027] This multi-connected intelligent air supply system uses a controller 19 to achieve centralized and unified distribution of the air supply control process. The magnetic levitation fan 4 draws air from the outside and supplies air to the biochemical pool 1 through the first output bronchus 9. The second flow switch 11 on the first output bronchus 9 feeds back the gas flow in the pipeline to the controller 19 in real time. The controller 19 controls the flow regulating valve 10 to achieve precise air supply to the biochemical pool 1; at the same time, the magnetic levitation fan 4 draws air from the outside and supplies air to the aeration sand settling tank 2 through the second output bronchus 12. The first pressure switch 14 on the second output bronchus 12 feeds back the gas pressure in the pipeline to the controller 19 in real time. The controller 19 controls the first pressure reducing valve 13 to achieve precise air supply to the biochemical pool 1; the magnetic levitation fan 4 draws air from the outside and also supplies air to the filter tank 3 through the third output bronchus 15. The third pressure switch on the third output bronchus 15 feeds back the gas in the pipeline to the controller 19. The pressure is fed back to the controller 19 in real time, and the controller 19 realizes precise air supply to the filter tank 3 by controlling the second pressure reducing valve 17. In addition, the controller 19 satisfies the intermittent air supply to the filter tank 3 according to the preset time setting and by controlling the second stop valve 16 on the third output bronchus 15. There are multiple magnetic levitation fans 4, and only one of them can be started during operation. When the controller 19 detects that the first flow switch 7 on the input bronchus 5 at the outlet of the magnetic levitation fan 4 reaches the maximum load of the fan, the second magnetic levitation fan 4 and the corresponding first stop valve 6 are turned on. Conversely, when so much air is not needed, the first stop valve 6 on the corresponding input bronchus 5 is closed in turn and the magnetic levitation fan 4 is turned off at the same time. The whole system realizes the intelligent control of three treatment pools using only one fan, which not only achieves the purpose of energy saving and consumption reduction, but also greatly improves the degree of intelligence and saves manpower and material costs.

[0028] Specifically, multi-way pipe fittings are used to connect the main air pipe 8 and the input and output bronchial pipes, and a PLC controller is used for the controller 19. The intermittent air supply time for the filter tank 3 is set in advance, and the number of magnetic levitation fans 4 is determined according to the required maximum load to meet the economic requirements. Moreover, when the filter tank 3 uses air, the air supply adjustment control of the biochemical pool 1 can also be stopped to keep the current state unchanged. The air source preferentially responds to the air supply demand of the filter tank 3 (the magnetic levitation fan 4 can also automatically adjust the air volume). After the filter tank 3 finishes using air, the air supply of the biochemical pool 1 resumes the automatic adjustment state, so as to achieve the best utilization of the air volume of the magnetic levitation fan 4 and achieve energy saving and consumption reduction.

[0029] Furthermore, a third stop valve 20 is provided on the second output bronchus 12 , and the third stop valve 20 is also connected to the controller 19 .

[0030] Specifically, the third stop valve 20 is used to control the on-off of the second output bronchial pipe 12 . When it is necessary to temporarily stop the air supply to the aeration grit chamber 2 , it is only necessary to close the third stop valve 20 through the controller 19 .

[0031] Furthermore, a plurality of first output bronchus tubes 9 are provided, and the plurality of first output bronchus tubes 9 are arranged in parallel.

[0032] Specifically, when there are multiple biochemical pools 1, multiple first output bronchial pipes 9 can be set to supply gas to the multiple biochemical pools 1 separately. The flow regulating valve 10 on each separate first output bronchial pipe 9 controls the gas flow of each branch to ensure uniform gas supply to each biochemical pool 1. Moreover, when the required gas supply of the multiple biochemical pools 1 is different, the multiple first output bronchial pipes 9 can also meet different gas supply needs.

[0033] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A multi-connected intelligent air supply system for centralized air supply to biochemical pools, aerated grit chambers and filter tanks, characterized in that: include: A plurality of magnetic suspension fans, wherein the outlet of the magnetic suspension fans is provided with an input bronchial pipe, the input bronchial pipe is provided with a first stop valve and a first flow switch, and the plurality of magnetic suspension fans are arranged in parallel; A main air pipe, the main air pipe being connected to the input bronchial pipes of the outlets of the plurality of magnetic suspension fans; A first output bronchus, connected to one end of the main bronchus away from the input bronchus, a flow regulating valve and a second flow switch are sequentially arranged on the first output bronchus, and the first output bronchus leads to a biochemical pool; A second output bronchus is also connected to one end of the main air pipe away from the input bronchus, a first pressure reducing valve and a first pressure switch are sequentially arranged on the second output bronchus, and the second output bronchus leads to an aeration grit chamber; A third output bronchus is also connected to the end of the main air pipe away from the input bronchus, and a second stop valve, a second pressure reducing valve and a second pressure switch are sequentially arranged on the third output bronchus, and the third output bronchus leads to the filter tank; A controller is connected to the multiple magnetic levitation fans, the first stop valve, the first flow switch, the flow regulating valve, the second flow switch, the first pressure reducing valve, the first pressure switch, the second stop valve, the second pressure reducing valve and the second pressure switch, the controller is used to read the data of the first flow switch and then control the opening and closing of the magnetic levitation fans and the first stop valve, the controller is also used to read the data of the second flow switch and then control the opening of the flow regulating valve, the controller is also used to read the data of the first pressure switch and then control the opening of the first pressure reducing valve, the controller is also used to read the data of the second pressure switch and then control the opening of the second pressure reducing valve, and the controller is also used to control the opening and closing of the second stop valve.

2. The multi-connected intelligent gas supply system according to claim 1, characterized in that: The second output bronchus is provided with a third stop valve, and the third stop valve is also connected to the controller.

3. The multi-connected intelligent gas supply system according to claim 1 is characterized in that: There are multiple first output bronchus, and the multiple first output bronchus are arranged in parallel.

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