Anti-blocking jet aeration device

Abstract

The invention relates to an anti-blocking jet aeration device which comprises a jet circulating pump, an aeration system and an air inlet system leading to the aeration system which are sequentially connected with a mud-water mixing pipe, the air inlet system comprises an air blower, a pipeline check valve, a blowoff valve and a backflushing valve which are connected in sequence, an aeration main pipe is connected between the blowoff valve and the backflushing valve, the blowoff valve and the backflushing valve lead to the aeration system through the aeration main pipe, the aeration system is provided with multiple paths in parallel, and each path comprises a jet aeration device and a regulating valve; an air inlet of the jet aeration device is connected with the aeration main pipe through a matched aeration branch pipe, and the regulating valve is arranged at a joint of the aeration branch pipe and the aeration main pipe; sewage enters the water inlet end of the jet aerator after being pressurized by the jet circulating pump and a pipeline thereof, and is released by the mixing pipe; air is pressurized by the air blower and the aeration branch pipe and then enters the air inlet end of the jet aerator, the air and sewage converge at the tail end of the sewage throat pipe, air-dissolved water is formed through the mixing pipe and released into the aeration tank, and the functions of aeration and stirring of sewage in the aerobic tank are completed.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an anti-clogging jet aeration device. Background Art

[0002] The aerobic process of sewage treatment is to use aerobic microorganisms (including facultative anaerobic microorganisms) to carry out biological metabolism under aerobic conditions to remove degradable pollutants such as COD, BOD, ammonia nitrogen, and phosphorus in sewage. The activated sludge method is a commonly used method for aerobic biological treatment of sewage. This method is to continuously mix and culture sewage and various microbial groups under artificial oxygenation conditions to form activated sludge. The biological coagulation, adsorption and oxidation of activated sludge are used to decompose and remove organic pollutants in sewage.

[0003] In the aerobic tank, the jet aeration device not only supplements and increases the dissolved oxygen content in the sewage, but also makes the activated sludge and sewage in the aerobic tank fully mixed and stirred, and the sludge is in a suspended state. Therefore, in the aerobic system, the integrity of the jet aeration device is very important.

[0004] During actual operation, the jet aeration device is exposed to materials such as sludge, sewage, and impurities, which makes it easy to clog the jet aeration device, thus affecting the aeration uniformity and process effect of the aerobic tank. Especially after the sewage treatment system is shut down, sludge settles and accumulates inside the aeration device, which is more likely to cause the aeration device to clog. At the same time, the jet aeration device is fixed at the bottom of the aerobic tank, and the system sewage needs to be pumped out after stopping production to dismantle and clean the aeration device, which is a lot of work.

[0005] The invention with announcement number CN118359323A discloses a butterfly-type jet aeration device, the key points of its technical solution include an outer chamber, an inner chamber located in the outer chamber, a top pipe connected to the outer chamber, an air inlet pipe connected to the top pipe, and a water inlet pipe connected to the inner chamber; the top of the top pipe has a top plate, the water inlet pipe passes through the top plate and is fixedly connected to the top plate; a plurality of outer nozzles are connected to the outer chamber, and a plurality of inner nozzles are connected to the inner chamber, and the number of the outer nozzles and the number of the inner nozzles are equal, both being 6-8; the plurality of outer nozzles are distributed in a circular shape with equal spacing, and the plurality of inner nozzles are distributed in a circular shape with equal spacing, but the internal structure of the jet aeration device still needs to be improved to enhance the aeration effect.

[0006] Therefore, it is necessary to provide a jet aeration device with simple structure, convenient operation and adjustable and controllable aeration volume. Summary of the invention

[0007] The purpose of the present invention is to provide an anti-clogging jet aeration device to prevent the aeration device from being blocked and to facilitate and quickly clear the aeration device after being blocked, thereby achieving the purpose of improving the aeration efficiency and reducing the aeration dead zone.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is: An anti-clogging jet aeration device comprises a mud-water mixing pipe connected to a water outlet of an aerobic system, a jet circulation pump, an aeration system and an air intake system leading to the aeration system, which are sequentially connected to the mud-water mixing pipe; The air intake system includes a blower, a pipeline check valve, a drain valve and a recoil valve connected in sequence, and an aeration main pipe is connected between the drain valve and the recoil valve and leads to the aeration system through the aeration main pipe, and a drain pipe is also provided at the drain valve; The aeration system is provided with multiple paths in parallel, and each path includes a jet aeration device and a regulating valve, and the air inlet of the jet aeration device is connected to the aeration main pipe through an aeration branch pipe, and the regulating valve is arranged at the interface between the aeration branch pipe and the aeration main pipe; The water inlet of the jet aeration device is connected to the jet circulation pump through a provided water pipe.

[0009] The jet aeration device includes an air inlet chamber connected to the air inlet, a water inlet channel connected to the water inlet, and a mixing tube for gas-liquid mixing, and a partition body is provided between the air inlet chamber and the water inlet channel, and a plurality of mixing tubes are provided at intervals along the circumferential direction and extend downwardly and obliquely from the inside to the outside, and the partition body is provided with corresponding air ducts arranged one by one therewith, and each of the air ducts is provided with a one-way valve.

[0010] The mixing tube includes a contraction section, a throat, a mixing section and a diffusion section which are arranged in sequence from the inside to the outside, and an air passage is opened between the mixing section and the throat. The gas entering through the air passage is mixed with the liquid entering through the throat and discharged through the mixing section and the diffusion section.

[0011] The inlet of the contraction section is wide, and the outlet thereof is narrowed and consistent with the width of the throat; The mixing section is located outside the airway and its width becomes larger.

[0012] The mixing section comprises an equal width section and a flared section, wherein the width of the equal width section is greater than the width of the throat section, and the flared section gradually widens from the inside to the outside until the end has the same width as the diffusion section.

[0013] A recoil pipe is also connected to the outer side of the recoil valve.

[0014] The regulating valve is a manual valve.

[0015] The beneficial effects of the present invention are: (1) The anti-clogging jet aeration device comprises a jet circulation pump, an aeration system and an air intake system leading to the aeration system which are sequentially connected to the mud-water mixing pipe; the air intake system comprises a blower, a pipeline check valve, a drain valve and a recoil valve which are sequentially connected, and an aeration main pipe is connected between the drain valve and the recoil valve and leads to the aeration system through the aeration main pipe, and the aeration system is provided with multiple channels in parallel, and each channel comprises a jet aeration device and a regulating valve, and the air intake of the jet aeration device It is connected to the aeration main pipe through the provided aeration branch pipe, and the regulating valve is arranged at the interface between the aeration branch pipe and the aeration main pipe; the sewage enters the water inlet end of the jet aerator after being pressurized by the jet circulation pump and its pipeline, and is released through the mixing pipe; at the same time, the air enters the air inlet end of the jet aerator after being pressurized by the blower and the aeration branch pipe, meets the high-speed flowing sewage at the end of the sewage pipe, forms dissolved air through the mixing pipe, and is released into the aeration tank to complete the functions of oxygenation and stirring of the aerobic tank sewage.

[0016] (2) After the aeration main pipe leads to the aeration branch pipes, although the aeration branch pipes are connected in parallel, they are at different distances from the blower, and there will be pressure differences in each branch. By adjusting the opening of each branch regulating valve, the aeration pressure of each branch can be adjusted to be uniform, and the aeration can be good. This can avoid weak aeration of some aeration equipment during daily operation, increase the risk of blockage, and eliminate hidden dangers in daily operation.

[0017] (3) When there is a slight blockage somewhere, increase the blower frequency, increase the air pressure in the pipeline, close other branch valves, blow air, and clear the blockage. The aeration pressure of each aeration branch can be controlled by the regulating valve to flush the sludge and other impurities in the air inlet chamber of the jet aeration device to prevent blockage, so as to achieve continuous and stable operation of the jet aeration device and achieve the purpose of preventing blockage.

[0018] (4) Installing a one-way valve in the air duct in the air inlet chamber can prevent sludge, sewage, etc. from flowing back into the air inlet chamber after the equipment stops running, increasing the risk of blockage. At the same time, by regularly adding high-pressure water to the backwash pipeline, the air inlet chamber of the jet aerator can be cleaned, and the jet aeration device can be operated continuously and stably, thereby preventing blockage.

[0019] (5) The mixing tube includes a contraction section, a throat, a mixing section and a diffusion section which are arranged in sequence from the inside to the outside, and the air passage is opened between the mixing section and the throat. The gas entering through the air passage is mixed with the liquid entering through the throat and discharged through the mixing section and the diffusion section. The inlet of the contraction section is wide, and its outlet is narrowed and consistent with the width of the throat, which can pressurize the incoming fluid, increase the flow rate, increase the dissolved gas pressure, and increase the gas-water mixing efficiency; The mixing section is located outside the air passage and has a larger width. It includes an equal-width section and a flared section. The width of the equal-width section is greater than the width of the throat section, which can extend the pressure holding time of the soda-water mixing and improve the structural strength.

[0020] (6) The integral anti-clogging jet aeration device can be operated with water or dredged during daily operation, reducing the probability of blockage without the need to evacuate the pool or manually enter the pool for dismantling operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial structural schematic diagram of the present invention; Figure 3 It is a structural schematic diagram of the jet aeration device. DETAILED DESCRIPTION

[0022] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0023] The present invention provides an anti-clogging jet aeration device, such as Figures 1 to 3 shown.

[0024] An anti-clogging jet aeration device comprises a mud-water mixing pipe 11 connected to a water outlet of an aerobic system, a jet circulation pump 10, an aeration system and an air intake system leading to the aeration system, which are sequentially connected to the mud-water mixing pipe 11; The air intake system includes a blower 12, a pipeline check valve 14, a drain valve 15 and a recoil valve which are connected in sequence, and an aeration main pipe is connected between the drain valve and the recoil valve and leads to the aeration system through the aeration main pipe; the drain valve 15 is connected to a drain pipe.

[0025] The aeration system is provided with multiple paths in parallel, and each path includes a jet aeration device 20 and a regulating valve 17, and the air inlet 1 of the jet aeration device 20 is connected to the aeration main pipe through the aeration branch pipe 13, and the regulating valve 17 is arranged at the interface between the aeration branch pipe 13 and the aeration main pipe.

[0026] The water inlet 1 of the jet aeration device 20 is connected to the jet circulation pump 10 through a water pipe. In this embodiment, the regulating valve 17 is a manual valve, and a backflush pipe 18 is connected to the outer side of the backflush valve 19.

[0027] The jet aeration device 20 includes an air inlet chamber 2 connected to the air inlet 1, a water inlet channel connected to the water inlet 4, and a mixing tube 5 for gas-liquid mixing, and a partition body is provided between the air inlet chamber 1 and the water inlet channel, and a plurality of mixing tubes 5 are provided at intervals along the circumferential direction and extend downwardly from the inside to the outside, and the partition body is provided with corresponding air ducts, and the air ducts are provided with one-to-one corresponding ones.

[0028] The mixing tube 5 includes a contraction section 6, a throat 7, a mixing section 8 and a diffusion section 9 arranged in sequence from the inside to the outside, and the airway is opened between the mixing section 8 and the throat 7, and the gas entering through the airway is mixed with the liquid entering through the throat 7 and discharged through the mixing section 8 and the diffusion section 9. The inlet of the contraction section 6 is wide, and its outlet is narrowed and consistent with the width of the throat; the mixing section 8 is located outside the airway and its width becomes larger; the mixing section 8 includes an equal width section and an expanded section, and the width of the equal width section is greater than the width of the throat section, and the expanded section gradually widens from the inside to the outside until the end is the same as the width of the diffusion section 9.

[0029] In order to prevent the aeration device from being blocked and to facilitate and quickly clear the aeration device after being blocked, and to achieve continuous and stable control of the aeration system, the specific operation method is as follows: When the liquid level in the aerobic pool is higher than the inlet height of the mud-water mixing pipe 11 of the jet circulation pump, the jet circulation pump 10 is started, and the mud-water mixture entering through the mud-water mixing pipe 11 is pressurized and enters the jet aeration device of each aeration system; then the blower 12 is started, and the pressurized air enters the jet aeration device 20 through the aeration main pipe 21 and the aeration branch pipe 13. The pressurized mud-water mixture continues to increase the pressure and flow rate in the contraction section of the jet aeration device mixing pipe 5, and at the same time, it is combined with the pressurized air at the end of the throat pipe 7, and after mixing, it enters the mixing section 8 and the diffusion section 9 to form dissolved air water that is sprayed into the aerobic system.

[0030] When the aeration system stops, the one-way valve 3 installed in the air passage of the jet aeration device 20 is used to prevent sludge, sewage, etc. from flowing back into the air inlet chamber 2 after the equipment stops running, thereby increasing the risk of blockage.

[0031] When the jet aeration device is unevenly aerated and slightly blocked, the aeration of the aeration system is shut down by closing the regulating valves 17 of the aeration systems of the other branches, and only one branch is opened. By increasing the pressure of the aeration device of a single branch, high-pressure air is used to flush the sludge and other impurities in the air inlet chamber of the aeration device to prevent blockage.

[0032] In addition, the aeration of the aeration system can be closed by closing the regulating valves 17 of the aeration systems of the other branches, and only opening the regulating valve of a certain branch, and adding high-pressure cleaning water into the recoil pipe 18. The high-pressure water enters the air inlet 1 of the jet aeration device through the regulating valve 17, and enters through the one-way valve 3 in the air passage of the air inlet chamber 2, and cleans the sludge and other impurities inside the aeration device, and finally discharges through the mixing pipe 5; then repeat this operation in sequence to clean each branch. When the cleaning is completed, the accumulated water is discharged through the drain pipe at the drain valve 15 in the air intake system, thereby realizing the continuous and stable operation of the jet aeration device and achieving the purpose of preventing blockage.

[0033] If the words "first", "second" and the like are used in this patent to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the present invention and simplifying the description, and the above words have no special meaning.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the invention claimed for protection. The scope of protection claimed for the present invention is defined by the attached claims and their equivalents.

[0035] In the description of the present invention, it is necessary to understand that the terms "front", "rear", "left", "right", "center", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the protection content of the present invention.

Claims

1. An anti-clogging jet aeration device, characterized in that: It includes a mud-water mixing pipe connected to the water outlet of the aerobic system, a jet circulation pump, an aeration system and an air intake system leading to the aeration system which are sequentially connected to the mud-water mixing pipe; The air intake system includes a blower, a pipeline check valve, a drain valve and a recoil valve connected in sequence, and an aeration main pipe is connected between the drain valve and the recoil valve and leads to the aeration system through the aeration main pipe, and a drain pipe is also provided at the drain valve; The aeration system is provided with multiple paths in parallel, and each path includes a jet aeration device and a regulating valve, and the air inlet of the jet aeration device is connected to the aeration main pipe through an aeration branch pipe, and the regulating valve is arranged at the interface between the aeration branch pipe and the aeration main pipe; The water inlet of the jet aeration device is connected to the jet circulation pump through a provided water pipe.

2. The anti-clogging jet aeration device according to claim 1, characterized in that: The jet aeration device includes an air inlet chamber connected to the air inlet, a water inlet channel connected to the water inlet, and a mixing tube for gas-liquid mixing, and a partition body is provided between the air inlet chamber and the water inlet channel, and a plurality of mixing tubes are provided at intervals along the circumferential direction and extend downwardly and obliquely from the inside to the outside, and the partition body is provided with corresponding air ducts arranged one by one therewith, and each of the air ducts is provided with a one-way valve.

3. The anti-clogging jet aeration device according to claim 2, characterized in that: The mixing tube includes a contraction section, a throat, a mixing section and a diffusion section which are arranged in sequence from the inside to the outside, and an air passage is opened between the mixing section and the throat. The gas entering through the air passage is mixed with the liquid entering through the throat and discharged through the mixing section and the diffusion section.

4. The anti-clogging jet aeration device according to claim 3, characterized in that: The inlet of the contraction section is wide, and the outlet thereof is narrowed and consistent with the width of the throat; The mixing section is located outside the airway and its width becomes larger.

5. The anti-clogging jet aeration device according to claim 3, characterized in that: The mixing section comprises an equal width section and a flared section, wherein the width of the equal width section is greater than the width of the throat section, and the flared section gradually widens from the inside to the outside until the end has the same width as the diffusion section.

6. The anti-clogging jet aeration device according to claim 1, characterized in that: A recoil pipe is also connected to the outer side of the recoil valve.

7. The anti-clogging jet aeration device according to claim 1, characterized in that: The regulating valve is a manual valve.

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