Installation of individualized branch aeration diffusers with automatic control

专利摘要:
The installation of individualized branch aeration diffusers with automatic control. The state and cleaning manual of each branch represents a significant advance in the operation of control and maintenance of the aeration installations using blowers and diffusers of the wastewater treatment plants. The main characteristics of this new form of installation is the continuity of the aeration pipe through the opposite wall of the reactor and the provision of a control valve at the outlet of that pipe. The most representative drawings of this patent are FIG.3 and FIG.4. Is it a matter of changing the traditional grating - network of diffusers located at the bottom of the reactor by the arrangement of individual branches and controlled in their state thanks to that continuity in the branch until it exits to the outside through the opposite part of the tank and the existence of a motorized and/or manual valve (Machine-translation by Google Translate, not legally binding)
公开号:ES2841428A1
申请号:ES202000004
申请日:2020-01-08
公开日:2021-07-08
发明作者:Villaverde Roberto Gonzalez
申请人:Villaverde Roberto Gonzalez；
IPC主号:

专利说明:

[0002] Installation of aeration diffusers by individualized branches with automatic-manual control of the status and cleaning of each branch
[0004] Technical sector
[0006] The present invention refers to a way of installing the branches of diffusers for aeration in the aerobic reactors of wastewater treatment plants. This new installation method is applicable to all aerobic reactors of treatment plants that are based on aerating with blowers and diffuser grills. Thus, it is valid for any aerobic treatment plant configuration (aeration in reinforced concrete tanks and in situ formwork, aeration in ponds waterproofed with plastic tarpaulin, aeration in precast concrete or steel tanks, etc ...). For this reason, this new way of installing diffuser grills is valid for any treatment plant that requires aeration by means of a blower and diffusers (urban treatment plants of any size, industrial treatment plants of any size, treatment plants for agri-food industries of any size, etc. ..)
[0007] Background of the invention
[0009] Aeration is a very common process in wastewater treatment. Mainly of importance is the aeration as a contribution of oxygen (02) necessary for the aerobic bacteria to metabolize organic pollutants (or others) dissolved in the water.
[0011] As such, throughout recent industrial history (last 150 years), many methods have been developed - equipment for supplying O2 in aerobic purification ponds.
[0012] We highlight some examples of current equipment:
[0013] 1. - Surface aeration turbines
[0014] 2. - Pumps - submerged ejectors
[0015] 3. - Contribution of pure O2
[0016] 4. - Aeration by blowers and diffuser grills
[0018] This fourth method is the most widespread, because it is efficient, in aerobic purification facilities that want to achieve adequate yields with the best optimization.
[0020] Aeration by means of blowers and diffusers is the one on which this improvement - invention is going to represent a clear improvement of the current state of the art. Currently, aeration installations with blowers and diffusers have an installation mode that varies to a greater / lesser degree, but that we could generalize:
[0021] 1. - The blower is the machine that takes the air from the environment and introduces it into the aeration system
[0022] 2. - The air that drives the blower is conducted by a suitable conduction (in dimensions and material) to the core of the tank (reactor) and the line is introduced into the tank itself full of water
[0023] 3. - At the bottom of the reactor tank, a grating of pipes is installed that distributes the air throughout the bottom of the reactor itself.
[0024] 4. - The diffusers that allow the air to escape to the surface from the bottom, in the form of small bubbles, are placed homogeneously distributed on the bottom grating. It is in these bubbles, and their way to the surface, where the transfer of O2 from the gas / air bubbles into the reactor / liquid takes place. Within diffusers, there are many models, highlighting two main categories which are tubular diffusers (in the form of a cross tube with its branch) and disk diffusers (in the form of a plate on the branch)
[0026] A first explanatory drawing of these elements and their most common placement is attached -Figure 1. This first drawing shows a grating with plate diffusers.
[0028] The diffuser grills are understood as a network of pipes tied to the bottom of the reactor, composing a closed circuit between them that prevents the entry of water into its interior. From the top comes a pipe - collector that feeds the entire framework tied to the bottom.
[0030] Biological reactors can have a large number of diffusers, so that sometimes there are several collectors that go down to feed all the diffusers in a single grating or in different grating.
[0032] During the operation of the treatment plant, over time, the entry of water - sludge will occur inside the grating and the diffusers. This entry of water, due to diffuser breakage, glue detachment, fortuitous accidents, aging ... implies a loss of aeration efficiency. Thus, the need to empty the reactor and clean the grating and correct - change diffusers must be considered from time to time. This maneuver can be a major disruption due to the need to empty that reactor and its inoperation for days. In addition to this inoperation, it is also necessary to have the capacity to receive the sludge that is withdrawn from the reactor to be repaired.
[0034] In order to avoid emptying the reactor, some systems have been developed that allow the mechanical lifting of small grating, so that the aforementioned maintenance tasks can be carried out outside.
[0036] Of course, aeration technology in treatment plants using blowers and diffusers is very widespread worldwide. For this reason, in order to check the State of the Art, it is enough to search the internet with any of the related keywords: "aeration diffusers" "diffuser grills" "removable diffuser grills" "aeration purifiers". Likewise, the state of the art can be assessed by searching on the internet for manufacturers - distributors of aeration diffusers: "Ecotec - aeration diffusers" "Barmatec - removable grills" "Xylem - Aeration" "Sulzer - ABS diffusers" "SSI - Aeration Finally, the State of the Art can also be assessed by searching for examples of installations carried out by numerous national and international water treatment plant installation companies: "Cadagua" "Veolía" "Grupo Soil" "ACS" "Pramar" "Degremont" "Dinotec" "Degremont" "Aema".
[0038] Explanation of the invention
[0040] In our case, the improvement is aimed at achieving control of the condition of the grating pipes and diffusers at all times, and with the reactor tank full of water - mud, and without moving or removable parts.
[0042] The invention consists of a new way of installing diffuser grills. The invention is made up of a triple condition:
[0043] 1.- Each branch of diffusers is supplied with air from the external collector independently from the rest of the branches of diffusers. There is a manual cut-off key in each branch, at the top, just at the outlet of the general collector
[0044] 2. - Each branch has continuity in its conduction pipe through the opposite wall until the top of the tank
[0045] 3. - At said termination of the branch at the top of the wall opposite the inlet, there is a motorized valve to control the opening and closing.
[0047] Thus, now, with this invention, we do not treat the installation of diffusers as a grating - a fixed pipe network - supported at the bottom of the aeration tank purification.
[0048] With this invention we treat each branch of diffusers as an independent element from the rest of the branches that will be distributed in the aeration tank.
[0050] The advantages in this new way of installing diffusers are many and varied:
[0051] -. When using a motorized valve at the end opposite the air inlet to the branch, the valve always opens some time before the blower stops. By doing so, the branch runs out of air in the diffusers when the blower stops. The diffusers are deflated when the blower stops. The durability of the diffusers is greater. The possibility of water-sludge entering the diffuser membranes is reduced, since they are deflated when the blower stops.
[0052] -. With this maneuver of the valve open when the blower stops, the blower is also protected as it will not have air load when driving to the stop. There is no risk of return of the air from the conduction on the blower
[0053] -. In the starting maneuver of the blower, now the behavior of the valve is also important. The motorized valve is always open when the blower starts to start. It closes some time after the blower starts. This maneuver at the start of the blower allows it to start without having to overcome the back pressure of the water column until the blower is not in adequate regime (until it has reached its operation at 50Hz).
[0055] In addition to the stop and start maneuvers, this invention represents a great control and maintenance capacity for the operators of the aeration basin:
[0056] -. It allows the operator to check the status of each branch with the blower running: air flow, back pressure, existence of water - mud inside the branch. The operator by opening the motorized valve of a branch allows much of the air to go through that exhaust and can measure and compare air flow rates and back pressure
[0057] -. Continuing with this maneuver of only 1 motorized valve open, with the blower running, the manual air inlet valves of some branches can be closed, significantly increasing the air flow through the branch with the motorized valve open. This allows the air to push the water - mud that might have that branch
[0058] -. Thus, it is possible to perfectly clean that branch of water - mud and assess in the future the behavior of the branch once it has been cleaned and how long it takes to get dirty again. Thus, the convenience of limiting the air flow that goes to a damaged branch can be assessed, even closing the air inlet to said branch so that performance is not lost in the installation of diffusers.
[0060] In addition to the possibilities of controlling the state of the jamming of branches, even reaching the closure of a branch due to the significant loss of air that its normal operation would suppose, this invention allows to reach the possible complete repair of a branch, without the need to act on the others, and without the need to drain the water from the reactor:
[0061] -. By using a professional diver, he can replace all the diffusers of a branch, with also a complete cleaning maneuver of the interior of the branch, so that at the end of the replacement maneuver of all the diffusers of a branch, it is available with the brand new diffuser conditions, ideal operating conditions - aeration performance
[0062] Brief description of the drawings
[0063] To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, a set of drawings is attached as an integral part of said description in which, with an illustrative and non-limiting nature, it has been represented the next.
[0064] The first two figures (Figure 1 and Figure 2) show a conventional installation of plate diffusers, in two variants depending on the number of diffusers.
[0065] Figure 1.- Shows a 3D view of a usual - conventional aeration installation by means of a fan and diffusers, with a single grating at the bottom, with a single air downpipe to the grating.
[0066] Figure 2.- Shows a 3D view of a conventional aeration installation using a fan and diffusers, in this case with a greater number of diffusers, with two grills at the bottom, with two air downpipes to the grills (one for each grille) The following three figures (Figure 3, Figure 4 and Figure 5) already show the development of the invention in its three most common variants.
[0067] Figure 3.- Shows a 3D view of an aeration installation by means of a fan and diffusers with the invention applied in its installation. In this case with individualized branches and with a motorized valve for each branch.
[0068] Figure 4.- Shows a 3D view of an aeration installation by means of a fan and diffusers with the invention applied in its installation. In this case, with individualized branches and with an outlet manifold so that there is a motorized valve in the outlet manifold that is used for all branches.
[0069] Figure 5.- Shows a 3D view of an aeration installation by means of a fan and diffusers with the invention applied in its installation. In this case with individualized branches and with a manual valve at the outlet of each branch. This would be a derivative application - simplified, replacing the motorized valve with a manual valve and, thus, making it a simpler installation, which allows manual control of the status of branches and diffusers, but does not have the advantages of the programmed actuation of the use of motorized valves.
[0070] Below is a list of the different elements represented in the figures that make up the invention.
[0071] 1 = aeration blower
[0072] 2 = General air collector pipe to reactor
[0073] 3 = Pipe Downpipe to grate
[0074] 4 = Grilled aeration pipes
[0075] 5 = Ventilation diffuser
[0076] 6 = Manual cut-off valve for air inlet to reactor
[0077] 7 = Individualized Downpipe for each branch
[0078] 8 = Pipe Branch of aeration
[0079] 9 = Individualized Rise Pipe for each branch
[0080] 10 = Motorized air outlet shut-off valve
[0081] 11 = General air outlet manifold pipe
[0082] 12 = Manual air outlet shut-off valve
[0083] Preferred embodiment of the invention
[0084] As already indicated, and as can be seen in Figure 3, the installation of aeration diffusers in the manner proposed by the invention, assumes that each branch pipe (8) with its diffusers (5) are independent within of the reactor tank. Each branch pipe (8) has its own air inlet downpipe (7) and, most importantly, each branch aeration pipe (8) has its continuity in its conduction (9) until the pipe exits through the crowning of the reactor on the wall opposite the entrance. At the end of this outlet pipe (9) there is a motorized valve (10), or in its simplest version, with a manual valve (12).
[0085] The full explanation of Figure 3 would be:
[0086] -. From the blower (1) the general collector pipe (2) for conducting air from the blower to the reactor tank leaves. This pipe - general collector (2) will be made of the usual material (generally metallic, resistant to the high Ta that the air driven by the blower can reach) and of sufficient diameter for the best air transport.
[0087] -. The general collector (2) runs along the top of the reactor tank along one of its walls, so that transversely to it, each one of the individualized downpipes (7) of air exit to each aeration branch (8).
[0088] -. In the general collector (2) individualized air downpipes (7) are mounted in the number and distribution that have been calculated based on the aeration installation in the reactor tank.
[0089] -. A manual shut-off valve (6) is installed at the beginning of each downspout, at the top of the reactor, accessible, never submerged. This manual shut-off valve (6) will be of great importance in the work of use and maintenance of that own aeration branch (8) and even use in the maintenance tasks of the other aeration branches (8).
[0090] -. The manual cut-off valve (6) will have the same section as the downpipe conduit (7). The manual cut-off valve (6) may be a ball, butterfly or even gate valve, with preference for full-flow cut-off keys.
[0091] -. The material and the diameter of the downpipe duct (7) will be of maximum suitability. The material may be metallic or in flexible material - plastic - rubber resistant to the temperature and air pressure that it carries inside and resistant to the elements. The diameter of the downpipe duct (7) will also be adequate to the need to have a low speed of circulation of the air conveyed by said downpipe (7).
[0092] -. Already at the bottom of the reactor tank, the air inlet downpipe (7) joins the aeration branch itself (8). The aeration branch (8) will be of adequate material and diameter and of sufficient length for the branch to travel along the entire bottom of the reactor tank. In this aeration branch (8) the aeration diffusers (5) are mounted in the number and distribution that have been calculated based on the aeration installation in the reactor tank.
[0093] At the other end of the aeration branch (8) the individualized rise for each branch (9) joins. This individualized rise (9) reaches the top of the reactor tank. This pipe can be made of the same material as the aeration branch (8) or another suitable material. The diameter of the individualized rise (9) for each branch will be the same or similar to that of the aeration branch (8).
[0095] -. At the outer end of the individualized riser pipe (9) for each branch the motorized shut-off valve will be located all - no air outlet (10)

权利要求:
Claims (4)
[1]
1. The main and most important claim is that each branch will have its continuity in an individualized air riser pipe up to the top of the reactor tank on the wall opposite to the air downpipe entering the branch. That is to say, the characterizing part of this invention is the arrangement of that riser - air outlet pipe on the wall opposite the inlet. This riser pipe comprises in its already external part a motorized valve that will be the one that allows the great utility of this new invention in the installation.
[2]
2. In a variation of claim 1, it is possible to have an air outlet collector pipe, outside the reactor tank, which contains a motorized valve at its end, so that all the air outlet pipes are connected to this manifold and its motorized valve is the one that allows automatic control at the start and stop of the aeration
[3]
3. In the case of this modification - claim 2, each riser - air outlet pipe will have a manual shut-off valve before its connection with the general outlet manifold.
[4]
4. Another possible arrangement of the invention is the installation described in claim 1 but with manual shut-off valves at the ends of the air outlet pipe. This modification allows a manual control of the state of branches and diffusers, without having the advantage of the automatic mode interlocked with the start and stop of the blower that supplies the air to the circuit. This arrangement of the invention is useful in simpler operating aeration installations, assuming the cost savings of motorized valves and their automation and control.

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同族专利:

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公开号 | 公开日

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ES2841428B2|2022-02-14|

引用文献:

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CN110386659A|2019-06-19|2019-10-29|盐城恒泽水环境治理有限公司|A kind of continuous cyclic aeration device for sewage treatment|

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ES202000004A|ES2841428B2|2020-01-08|2020-01-08|Installation of aeration diffusers by individual branches with automatic control - manual status and cleaning of each branch|ES202000004A| ES2841428B2|2020-01-08|2020-01-08|Installation of aeration diffusers by individual branches with automatic control - manual status and cleaning of each branch|