Movable defoaming spraying device for sewage treatment
By designing a movable defoaming spray device for sewage treatment, the foam is impacted by using the water pump and the defoaming pump head to form a fountain-like droplet to impact the foam, the problem of foam affecting the treatment efficiency in the existing sewage treatment system is solved, and an efficient and low-cost defoaming effect is achieved.
Patent Information
- Application Number
- CN202421865132.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-03
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-03
AI Technical Summary
In existing sewage treatment systems, the foam generated by the aeration tank affects the sewage treatment efficiency, and existing defoaming methods such as water spraying and chemical defoaming have problems such as low efficiency, high cost and easy blockage.
A movable defoaming spraying device is designed, including a water pump, a float, a defoaming pump head, a pull loop, a traction rope and a fixing frame. The device extracts sewage through a water pump, sprays water into a fountain-shaped body with a defoaming pump head, forming dense droplets that produce impact on the foam surface, achieving the purpose of defoaming.
The device can effectively eliminate foam in the sewage treatment system, reduce operating costs, reduce the possibility of device blockage, improve defoaming efficiency, and be easy to move and repair.
Smart Images
Figure CN222877679U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sewage treatment, in particular to a movable defoaming spray device for sewage treatment. Background Art
[0002] In the process of biological sewage treatment, aeration tanks are often accompanied by a large amount of foam. When the foam covers the surface of the aeration tank, it will affect the contact between the aeration tank and oxygen, thereby reducing the sewage treatment efficiency. Foam generation is generally divided into three situations: (1) In the early stage of aeration tank commissioning, the sludge growth rate is slow, the sludge concentration in the tank is relatively low, while the treatment volume is large and the sludge load is relatively high. The sludge is not adapted to the growth environment and is prone to produce a large amount of foam; (2) Sewage contains detergents and some industrial surfactants. These substances have unique amphiphilic properties, with one end being a hydrophilic polar group and the other end being a hydrophobic non-polar group. Under aeration conditions, one end of the non-polar group extends into the bubble, while the polar group is selectively adsorbed by the hydrophilic substance, causing the surface of the hydrophilic substance to be converted into a hydrophobic substance and adhere to the bubble water film, floating to the water surface with the bubble. Surfactant substances can make foam easy to generate, and after generation, they also play a certain stabilizing role, making the foam more difficult to dissipate; (3) The expansion of filamentous bacteria can also trigger foam generation. The density of filamentous bacteria is smaller than that of water and they repel each other, so they can float on the water surface. The erupted filamentous bacteria mix with the air bubbles and sludge to form foam, which covers the surface of the air bubbles, protecting the foam and making it stable and not easy to break.
[0003] The foam produced by the aeration tank is not conducive to the normal operation of the sewage treatment system. On the one hand, a large amount of foam accumulates and covers the surface of the aeration tank, which will reduce the oxygen transfer efficiency of the mechanical aeration method, affect the sewage treatment effect, and cause the deterioration of the effluent water quality. On the other hand, too much foam overflows from the aeration tank and spreads to the surrounding area, which not only pollutes the outside of the equipment, but also affects the normal use of monitoring instruments, which is not conducive to the operation of the sewage treatment system. In serious cases, it will also affect the surrounding environment and increase the operating cost.
[0004] At present, there are two ways to achieve sewage defoaming:
[0005] (1) Physical defoaming
[0006] Water spraying is the most commonly used physical method. High-speed spraying of water or water droplets can break up the bubbles floating on the water surface. Some of the sludge particles that have been broken up can regain their sedimentation properties, which can reduce foam. Generally, water is sprayed on the foam surface by manually connecting pipes and using water guns and other equipment to eliminate foam. This is a temporary defoaming measure. You can also choose to set up a spray defoaming system for the entire aeration area, that is, install spray pipes and nozzles on the pool surface, choose tap water as the spray water source or recycle the effluent from the sewage treatment system, and use a water pump as a power device to transport water to the spray pipes and nozzles for spraying to achieve a long-term defoaming effect. Although water spraying cannot fundamentally eliminate foam, it is the simplest and most commonly used physical method.
[0007] (2) Chemical defoaming
[0008] Chemical defoaming uses the method of adding defoamers. The definition of defoamers is relatively broad. All chemical reagents that can destroy the stability of foam can be called defoamers. When defoamers are added to sewage, the surface tension of the foam in the area in contact with the defoamer is reduced, while the surface tension of the foam in other areas hardly changes. The part with reduced surface tension is strongly pulled and extended to the surroundings, and then the foam is broken to achieve the purpose of defoaming. The effect of defoamers can only reduce the growth of foam, and it cannot eliminate the formation of foam. However, some defoamers have negative effects. Excessive addition or improper addition position will greatly reduce the total amount of organisms in the reaction tank.
[0009] However, the above defoaming methods have the following problems:
[0010] (1) Water spray defoaming is carried out by manual water sprinkling, which takes a long time to defoam, has low efficiency and ineffective effect. The spray defoaming system is arranged for the entire pool, which requires a large amount of spray water and is costly. If the effluent from the sewage treatment system is recycled as a water source, the spray pipes and nozzles are prone to blockage and are difficult to repair.
[0011] (2) The chemical defoaming method of adding defoaming agents has the disadvantage of high operating costs. Improper addition will affect the growth of microorganisms, reduce the total amount of organisms in the reaction tank, and be detrimental to the normal operation of the biochemical treatment system.
[0012] Therefore, there is an urgent need to develop a low-cost, easy-to-maintain, and effective defoaming spray device. Utility Model Content
[0013] The technical problem to be solved by the utility model is to overcome the existing defects and provide a movable defoaming spray device for sewage treatment, which can effectively eliminate the foam problem in the aeration tank of the sewage treatment system and ensure the normal operation of the biochemical treatment system. At the same time, it has low investment, low operating cost, reliable effect, and easy maintenance, and is applicable to various foam problems in sewage treatment.
[0014] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a movable defoaming spray device for sewage treatment, the device is installed in an aeration tank, and includes a water pump, a float, and a defoaming pump head. The water outlet of the water pump faces upward, the float is arranged on the outside of the water pump, and the defoaming pump head is arranged at the water outlet of the water pump.
[0015] Furthermore, the buoy is an annular structure, the interior of the buoy is a hollow structure, and the buoy is made of plastic material, so that the entire device can float on the water.
[0016] Furthermore, the defoaming pump head is a trumpet-shaped structure, which is installed at the water outlet of the water pump, and can make the water spread in a fountain shape, effectively increasing the spraying range and defoaming efficiency.
[0017] Furthermore, two pull rings are symmetrically arranged on the outer side of the buoy.
[0018] Furthermore, the device also includes a traction rope and a fixing frame, wherein the fixing frame is installed around the top surface of the aeration tank, one end of the traction rope is connected to the pull ring, and the other end is tied to the fixing frame.
[0019] Furthermore, the fixing frame may be replaced by an embedded part.
[0020] Furthermore, the traction rope is a steel wire rope or a corrosion-resistant nylon rope, one end of which is connected to the pull ring on the buoy and the other end is tied to the fixing frame to ensure that the water pump can float stably on the water surface.
[0021] Through the two pull rings provided on the outside of the buoy, one end of the traction rope is passed through one of the pull rings for tying, and the other end is tied to the fixing frame around the top surface of the aeration tank, and the other pull ring is also tied to the fixing frame using the traction rope. The traction rope pulls the buoy from the opposite direction, so that the working state of the water pump is not disturbed by wind or hydraulic fluctuations, ensuring that the spray defoaming can be carried out continuously and stably.
[0022] Furthermore, the water pump is cylindrical.
[0023] Furthermore, the buoy is sleeved on the outside of the water pump and is arranged at 1 / 3 of the water pump body.
[0024] The ring-shaped float is sleeved on the outside of the cylindrical water pump and is set at 1 / 3 of the pump body. The water pump is placed in the aeration tank. Through the buoyancy of the float, 2 / 3 of the pump body can be placed below the water surface, and the water pump changes with the change of the water surface under the drive of the float, ensuring that the water pump can continuously and stably pump sewage.
[0025] Furthermore, the water pump also includes a water pump housing, which is made of engineering plastic injection molding. The water pump housing has a protective effect on the water pump, and the engineering plastic housing is light in weight.
[0026] Principle of the utility model: A movable defoaming spray device for sewage treatment comprises a water pump, a float, a defoaming pump head, a pull ring, a traction rope and a fixed frame. The float of the ring structure is sleeved on the cylindrical water pump and is arranged at 1 / 3 of the water pump body. The water pump is placed in the aeration tank. Through the buoyancy of the float, 2 / 3 of the pump body can be placed below the water surface, and the water pump changes with the change of the water surface height under the drive of the float, ensuring that the water pump can continuously and stably extract sewage. The water outlet of the water pump faces upward, connected to the defoaming pump head, and is located above the water surface; the water inlet faces downward, is located below the water surface, and is in direct contact with the sewage. The sewage in the aeration tank is pumped by the water pump, and is sprayed into the air in a fountain shape through the defoaming pump head, forming dense droplets. The droplets exert impact force on the foam surface to achieve the purpose of defoaming.
[0027] There are two pull rings on the outside of the buoy. One end of the traction rope passes through one of the pull rings for tying, and the other end is tied to the fixed frame around the aeration tank. The other pull ring is also tied to the fixed frame with the traction rope. The traction rope pulls the buoy from the opposite direction so that the working state of the water pump is not disturbed by wind or hydraulic fluctuations, ensuring that the spray defoaming can be carried out continuously and stably. The defoaming device can be moved freely according to the defoaming needs of various areas of the aeration tank. Just untie the traction rope tied to the fixed frame, move the defoaming device to the new area, and re-tie the traction rope.
[0028] Compared with the prior art, the beneficial effects of the movable defoamer for sewage treatment of the present application are:
[0029] 1. Use the raw water from the aeration tank for spraying to save water resources and reduce operating costs;
[0030] 2. No need to use pipes and nozzles, greatly reducing the possibility of device clogging;
[0031] 3. Compared with defoaming methods such as water gun defoaming and adding defoaming agent, this device can achieve continuous spray defoaming with high defoaming efficiency;
[0032] 4. Connect the buoy to the water pump, use the traction rope to pull the buoy and the water pump, tie them to the fixed frame, untie the traction rope on the fixed frame, and then move or repair them freely;
[0033] 5. The device is easy to install and disassemble, convenient for maintenance and to eliminate foam in the entire area. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] Figure 1 It is a schematic diagram of the structure of the utility model;
[0035] Figure 2 It is a top view of the utility model;
[0036] In the figure: 1-water pump, 2-buoy, 3-defoaming pump head, 4-pull ring, 5-traction rope, 6-fixed frame. DETAILED DESCRIPTION
[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0038] For example, see Figures 1 to 2 The utility model provides a technical solution: a movable defoaming spray device for sewage treatment, the device is installed in an aeration tank, and includes a water pump 1, a float 2, and a defoaming pump head 3. The float 2 is arranged on the outside of the water pump 1, and the defoaming pump head 3 is arranged at the water outlet of the water pump 1, and the water outlet of the water pump 1 faces upward. The water outlet of the water pump 1 faces upward, connected to the defoaming pump head 3, and is located above the water surface; the water inlet faces downward, is located below the water surface, and is in direct contact with the sewage. The sewage in the aeration tank is extracted by the water pump 1, and is sprayed into the air in a fountain shape through the defoaming pump head 3, forming dense droplets. The droplets exert impact force on the foam surface to achieve the purpose of defoaming.
[0039] Furthermore, the buoy 2 is an annular structure, the interior of the buoy 2 is a hollow structure, and the buoy 2 is made of plastic material, so that the entire device can float on the water.
[0040] Furthermore, the defoaming pump head 3 is a trumpet-shaped structure, which is installed at the water outlet of the water pump 1, and can make the outlet water diffuse in a fountain shape, effectively increasing the spraying range and defoaming efficiency.
[0041] Furthermore, two pull rings 4 are symmetrically arranged on the outer side of the buoy 2 .
[0042] Furthermore, the device also includes a traction rope 5 and a fixing frame 6. The fixing frame 6 is installed around the aeration tank. One end of the traction rope 5 is connected to the pull ring 4, and the other end is tied to the fixing frame 6.
[0043] Furthermore, the traction rope 5 is a steel wire rope, one end of which is connected to the pull ring 4 on the buoy 2, and the other end is tied to the fixing frame 6, so as to ensure that the water pump 1 can float stably on the water surface.
[0044] Through two pull rings 4 provided on the outside of the buoy 2, one end of the traction rope 5 passes through one of the pull rings 4 for tying, and the other end is tied to the fixing frame 6 around the aeration tank, and the other pull ring 4 is also tied to the fixing frame 6 using the traction rope 5. The traction rope 5 pulls the buoy 2 from the opposite direction, so that the working state of the water pump 1 is not disturbed by wind or hydraulic fluctuations, ensuring that the spray defoaming can be carried out continuously and stably.
[0045] The device of the present application can be freely moved according to the defoaming needs of various areas of the aeration tank. It only needs to untie the traction rope 5 tied to the fixing frame 6, move the device to a new area, and re-tie the traction rope 5.
[0046] Furthermore, the water pump 1 is cylindrical.
[0047] Furthermore, the buoy 2 is sleeved on the outside of the water pump 1 and is arranged at 1 / 3 of the pump body of the water pump 1 .
[0048] The ring-shaped float 2 is sleeved on the outside of the cylindrical water pump 1 and is arranged at 1 / 3 of the water pump body. The water pump 1 is placed in the aeration tank. Through the buoyancy of the float 2, 2 / 3 of the pump body can be placed below the water surface. The water pump 1 changes with the change of the water surface height under the drive of the float 2, ensuring that the water pump 1 can continuously and stably pump sewage.
[0049] Furthermore, the water pump 1 also includes a water pump 1 shell, which is made of engineering plastic injection molding. The water pump 1 shell has a protective effect on the water pump 1, and the engineering plastic shell is light in weight.
[0050] For example 2, please refer to Figures 1 to 2 , which is different from the first embodiment, the device further includes a traction rope 5 and an embedded part, the embedded part is installed around the aeration tank, one end of the traction rope 5 is connected to the pull ring 4, and the other end is fixed to the embedded part.
[0051] Furthermore, the traction rope 5 is a corrosion-resistant nylon rope.
[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0053] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A movable defoaming spray device for sewage treatment, characterized in that: The device is installed in an aeration tank and comprises a water pump, a float and a defoaming pump head. The water outlet of the water pump faces upward, the float is arranged outside the water pump, and the defoaming pump head is arranged at the water outlet of the water pump.
2. The movable defoaming spray device for sewage treatment according to claim 1 is characterized in that: The buoy is an annular structure, and the interior of the buoy is a hollow structure.
3. The movable defoaming spray device for sewage treatment according to claim 2 is characterized in that: Two pull rings are symmetrically arranged on the outer side of the buoy.
4. The movable defoaming spray device for sewage treatment according to claim 3 is characterized in that: It also includes a traction rope and a fixing frame, wherein the fixing frame is installed around the top surface of the aeration tank, one end of the traction rope is connected to the pull ring, and the other end is tied to the fixing frame.
5. The movable defoaming spraying device for sewage treatment according to claim 1 is characterized in that: The defoaming pump head is a trumpet-shaped structure.
6. The movable defoaming spraying device for sewage treatment according to claim 5 is characterized in that: The water pump is cylindrical.
7. The movable defoaming spray device for sewage treatment according to claim 6 is characterized in that: The buoy is sleeved on the outside of the water pump and is arranged at 1 / 3 of the water pump body.
8. The movable defoaming spray device for sewage treatment according to claim 4 is characterized in that: The traction rope is a steel wire rope or a corrosion-resistant nylon rope.
9. The movable defoaming spraying device for sewage treatment according to claim 2 is characterized in that: The buoy is made of plastic material.
10. The movable defoaming spray device for sewage treatment according to claim 1, characterized in that: The water pump also includes a water pump housing, and the water pump housing is formed by injection molding of engineering plastics.