HUT69455A - Processing plant for waste water treatment - Google Patents

Abstract

The invention relates to a processing plant for the treatment of waste water from cleaning and/or extraction works using very high pressure water jets, in which the waste water is taken through several chambers (3, 4, 5, 6) containing filter beds (9, 10) or filter inserts (11) and take the form of a transportable container (1). For pre-cleaning in a first cleaning stage there are at least two pre-chambers (3, 4) which can be connected alternately or at the same time to the waste water inlet (12). In addition, there are two separate end chambers (6, 7), the intake apertures (8) of which are permanently connected to a previous chamber (5). The end chambers (6, 7) can be cut off by blocking the relevant outlet (19, 20).

Description

BACKGROUND OF THE INVENTION The present invention relates to a treatment device for treating wastewater, in particular wastewater from purification operations using purification and / or high pressure jets, in which the wastewater is passed through a plurality of chambers containing filters or filter cartridges formed from one or more transportable containers.

Said pre-processing equipment of this type is known from DE 4-A-51 539 A1. This known device comprises a series of three chambers arranged in a row in a transportable container, the first chamber having a top sewer inlet, a through port located below the partitions of the center chamber, and an outlet located above but below the level of the inlet in the last chamber for purified water. The first and last chambers have horizontally arranged filter cartridges, while the middle chamber contains vertically positioned filter cartridges. The structure of this known preparation apparatus is proven in practice. However, it has been shown that cleaning the horizontal filters at regular intervals results in downtime, which is detrimental to continuous operation.

It is an object and object of the present invention to improve the operating conditions of the preparation apparatus of the type described in the introduction so as to allow continuous preparation for a prolonged period without interrupting operation.

The object of the present invention is solved by using at least two pre-chambers for pre-cleaning, which can be alternately or simultaneously connected to the waste water inlet. The invention makes it possible to regularly clean or replace the filters in the first purification step without interrupting operation, whereby the pre-chamber, which is always separated from the waste water inlet, can be cleaned while the other pre-chamber is supplied with the complete waste stream. Furthermore, the design of the pretreatment device according to the invention also provides the opportunity to better adapt to different operating situations. For example, if the wastewater to be treated is contamination! load is extremely high, both pre-chambers can be connected to the wastewater inlet at the same time, so that through this parallel operation the cleaning capacity of the first purification step or stage will increase accordingly.

In one embodiment of the invention, the two pre-chambers are connected sequentially, whereby the outlet side outlet of one of the pre-chambers extends into the other pre-chamber. Such an arrangement of the pre-chambers allows for a simple construction of the pre-treatment apparatus and, above all, it is advantageous if the apparatus consists of a single tank divided into chambers with partitions which can then be transported by road vehicles. It is also advantageous that the chamber connected after the two pre-chambers is always inflated to its full width regardless of which of the two pre-chambers is connected to the waste water inlet.

In a further preferred embodiment of the invention, it is envisaged that the two pre-chambers are connected in parallel to a group of post-cleaning end chambers.

In another embodiment, a charge status meter is used to automatically measure and control the discharge of wastewater, and when a predetermined uppermost position is exceeded in one of the pre-chambers, the valve is closed to the pre-chamber and opened to the second chamber. Further, a charge status transducer of an automatic overfill protection system can be located in the prefab, whereby, when the maximum filling state is reached, the waste water supply is interrupted by switching off the pump or closing the inlet valve. This will safely prevent overflow of the unit.

The operation of the treatment apparatus according to the invention can be further improved by using two separate end chambers for wastewater after-treatment, the inlet openings of which are continuously connected to the previous chamber of the plant and which can be shut off by closing the respective outlet opening. In the further development of the present invention, it is also possible to clean the horizontal filters in the end chambers during operation of the preparation apparatus, wherein the end chamber to be cleaned is switched off. As with the pre-chambers, the end chambers can be connected in parallel or in series.

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In order to allow the live cooking apparatus to be emptied through the end chambers, it is contemplated by the present invention to provide a closure outlet near the bottom of at least one of the two end chambers, which is covered with a filter element having the same effect as a filter in the end chamber. This ensures that the water to be drained is of the required purity when the system is drained, and that contaminant particles and contaminants are retained in the system.

When operating high pressure testers, the water exiting the radiators cannot be completely recaptured since, for example, a certain amount of water is lost due to evaporation and mist formation. Therefore, it is necessary to supplement the five volumes of wastewater captured and treated with the amount of fresh water corresponding to the loss of water. According to the present invention, this can be achieved in a simple manner by coupling, after the end chambers, a storage tank which is connected to a fresh water supply and from which the high pressure testers are fed. In addition, the control of the fresh water supply can be accomplished in a simple manner by measuring the filling status of the reservoir and, if it falls below a predetermined limit, opening the valve for the fresh water supply.

The first cleaning step with horizontal filters requires that the waste water inlet is distributed as evenly as possible over the surface of a pre-chamber. To achieve this, it is also contemplated in accordance with the present invention that the sewerage inlet has one or more distribution pipes with horizontally arranged pipe loops and vents, the pipes of which have alternately outlet openings in adjacent pipe sections. The wastewater returned by the return pump to the treatment plant through the sewage inlet according to the invention enters the chamber at several locations distributed across the chamber surface, thereby providing a uniform load on the filters and avoiding the formation of strong flow zones.

According to the invention, the sewerage pipes are made of elastically deformable structural material, have transverse slots parallel to the longitudinal axis and are formed by rotating each pipe section about their longitudinal axis so that the longitudinal slits are provided with outlet openings on alternating sides.

If the waste water contains impurities that are not or only difficult to separate by filtration or adsorption, such as heavy metals or hydrocarbons, two flocculation chambers are connected in parallel to each other before the device is discharged, with the addition of a flocculating agent. said impurities or contaminants may be removed by flocculation. The flocculation chambers are preferably provided with pumps for delivering the treated waste water to one of the pre-chambers of the plant after the road construction of the flakes has been sedimented. The use of pumps may be omitted if the flocculation chambers are placed at a higher level than the pre-chambers of the apparatus. Preferably, the flake removal chambers form a separate building unit that can be connected to the pre-chambers of the device by wires. This allows the unit to operate with or without prewashed flake chambers, depending on requirements. For effective flake formation, it is preferable that the flake removal chambers be equipped with mixing devices. For this purpose, holding devices according to the invention can be applied to the flake chambers for mixers. Further, the flocculation chambers are provided with a venting device connected to a compressed air source to allow water to circulate through the air and, if necessary, to supply oxygen.

By arranging two parallel flake decontamination chambers in an analogous manner to the two alternately connected prefabricated chambers, continuous sewage treatment is possible without interrupting the operation of the unit.

The flocculation chambers thus take over the same buffer function that comes with the parallel connected pre-chambers. If the installation has two flocculation chambers in the inlet, it is sufficient that the two flocculation chambers are followed by only one pre-cleaning chamber.

To purify wastewater in the flocculation chambers, after filling the flocculation chamber, the pH is first measured and brought to the required value. According to a prior analysis, a flocculating agent is then introduced into the wastewater and mixed with it while the incoming wastewater is fed to the other flocculation chamber. After the required residence time for the flakes to form and settle, the treated waste water is pumped from the first flocculation chamber to the pre-chamber of the apparatus. The same process is then repeated in the second flake decontamination chamber, which has been filled in the meantime.

The invention will now be described in more detail with reference to exemplary embodiments thereof, with reference to the accompanying drawings, in which:

Figure 1 is a schematic top plan view of the preparation apparatus according to the invention with five chambers interconnected;

Figure 2 is a schematic longitudinal sectional view of the preparation apparatus of Figure 1;

Figure 5 is a schematic top plan view of a further embodiment of the preparation apparatus, with chambers arranged in parallel and a stock container;

Figure 4 is a schematic longitudinal sectional view of the preparation unit of Figure 3;

Figure 5o is a top plan view of the sewage inlet according to the invention;

Figure 6 is a cross-sectional view along the line A-A of the sewage inlet pipe of Figure 5; finally

Figure 7 is a cross-sectional view of the sewage inlet pipe of Figure 5 'along line B-B.

Turning to the preparation apparatus shown in Figures 1 and 2, it comprises a block-shaped container 1, which is divided, by means of partitions 2, into a pre-chamber 5 and 4, an intermediate chamber 5 and two end chambers 6, 7. The partitions 2 are provided with openings 8 near the bottom of the container 1. The chambers 3-7 are sequentially arranged and communicating with each other through the passageways 8.

Horizontal filters 9 and 10 are provided in the pre-chambers 3 and 4 and in the end chambers 6 and 7, through which water flows in a vertical direction. The intermediate chamber 5 comprises two standing filters 11 spaced from the partitions 2. Do the filters 9, bottom filters, contain filter sieves that accept coarse particles, as well as filter materials such as glass wool, gravel and other filter materials? they contain the finer particles. In addition, the filters 9 also provide flow damping to facilitate the deposition of finer floating particles. A 11 • ·

The stationary filters 10 are preferably filled with filter materials for separating hydrocarbons and heavy metals. The waste water is supplied to the pre-chambers 5 and 4 via 12 inlets with two separate inlet pipes 15 and 14, which can be closed by means of valves 15 _t and 16, respectively. Distributor pipes 17 and 18 are connected to the outlet openings of the inlet pipes 15 and 14 and distribute the waste water therewith evenly across the horizontal inlet sections of the pre-chambers 5 and 4. The shape of the manifolds 17 and 18 may correspond to the shape shown in Figs.

To discharge purified water, the end chambers 6 and 7 are provided with outlet openings 19 and 20 which can be closed by valves 21 and 22. A storage or balancing tank (not shown or illustrated below) can be connected to the outlets 19 and 20, from which the high pressure radiator feed pump draws water.

The apparatus described enables the efficient and effective purification of water produced during operation with very high pressure radiators. To this end, the wastewater that is captured, collected and pumped to the inlet 12 is first introduced into only one pre-chamber, such as pre-chamber 5, with valve 15 open and valve 16 closed. The pre-chamber 5 then flows through the pre-chamber 4 to the intermediate chamber 5, where passes through the strainer 11 and then first enters the end chamber 6. If the valve 21 in the outlet 19 is open while the valve 22 in the outlet 20 is closed, the water only receives post-purification in the end chamber 6 and after passing through the filter 10 leaves the device through the outlet 19. Pre-chamber 4 and end chamber 7 do not participate in water purification in such a mode, so that their filters can be cleaned or replaced if necessary.

If, after a certain operating time, the flow resistance in the pre-chamber 5 and / or the end chamber 6 is too high due to the increasing contamination of the filters, the charge level in the pre-chamber 3 will increase beyond a certain degree. This increase in charge level is detected by a measuring device (not disclosed) and signaled by a suitable signal. This signal can then automatically or manually re-direct the device, whereby the valves 15 and 21 are closed and the valves 16 and 22 are opened. Thus, the front chamber 5 and the end chamber 6 are switched off so that the bottom filters therein can be cleaned without the need to interrupt the operation of the unit.

The cleaning and regeneration of the strainer 11 does not require the equipment to be shut down. Since two strainers 11 are used, one of the two can be bypassed, removed, and replaced with a purified or regenerated strainer without any drawbacks.

If the operation of the above described apparatus is not continuous, or if the required cleaning interruptions are sufficiently hot, the inlet 12 can be connected to both pre-chambers 4 simultaneously to increase the cleaning performance and to compensate for particularly high dirt loads. by opening valves 21 and 22. The device according to the invention thus enables simple adaptation to short-term peak loads.

For emptying the device, the end chamber 7 has a lockable outlet 25 in front of which a filter element 24 is connected. It is also possible to connect a recirculation line to the outlet 25.

5o and 4, the pre-settling apparatus shown in FIGS. 5o and 4 is provided with a transverse bulkhead 51 having transverse openings 52 in a columnar container 5θ and two longitudinally spaced pre-compartments 54 and 55, two intermediate compartments 56 and and are provided in parallel with end chambers 57 and 58 arranged side by side. The front chambers 54, 55 and the end chambers 57, 58 are provided with horizontal filters 59 and 40, bottom filters. The intermediate chamber 56 has a vertical standing filter 41 · · · arranged parallel to the partitions 51. The outlet openings 43, 44 located above the horizontal filters 40 connect the end chambers 57, 58 with a storage tank 45 connected to the tank 5θ, which is connected to the fresh water inlet 46. The fresh water inlet 46 is provided with a float valve 47 which controls the level of fluid in the reservoir 45

The equipment shown in Figures 5 and 4 provides the same operational capabilities as the equipment shown in Figures 1 and 2. Due to the arrangement of the pre-chambers 54 and 55 and the end chambers 57 and 58, it is desirable to have only one, e.g. the pre-chamber 54 is used, which is located diagonally with the end chamber 58, since this results in better flow than the stationary filter 41.

5-7. Figures 1 to 5 show the configuration of the manifold 50 connected to the inlet 12 according to the invention. The manifold 50 is a double pipe loop, approx. It is in the form of an eighth, which is in a horizontal plane and is connected by a flange 51 to the tank wall 52 and the inlet pipe 53. The manifold 50 consists of interconnected individual pipe sections 54-58 which have longitudinal slots 59 and 60 offset from one another on their upper side. The longitudinal slots 59 and 60 extend in the longitudinal direction, approx. They pass through a 90 ° pipe cross section and are always offset relative to one another. The longitudinal slots 59 »80 thus form outlet openings for the inlet water through which the water can exit in the direction of the arrows shown in Figure 5 · 4 4 ··· step out of manifold 50 <> In order to ensure a smooth discharge of water along the entire length of manifold 50, the widths of the longitudinal slots 59 and 60 increase in the direction of flow. For example, the longitudinal slots 59 and 60 in the tube section 56 are wider than in the tube section 54. The manifold described above is easy to produce and provides an even distribution of the amount of water delivered through the inlet 55 in a relatively large horizontal plane. Instead of the offset slots 59 and 60, each tube section may be provided with through slots and may be twisted about their longitudinal axis in accordance with the offset of the slots 59, 60.

The preparation apparatus described above is distinguished by its simple manufacture, its compact size and its easily adaptable mode of operation. The equipment can be designed to be easily transportable in size and to be constructed in a stationary form. The equipment must be capable of using different types of filter media. Different wastewater treatment methods can be used in each chamber to sequentially remove the various material contents from the water. Purified water can be reused as domestic and industrial water.

Although it is generally advantageous to have the individual chambers in a common container, they can be separated from one another in the event of unfavorable delivery conditions and may consist of only one chamber at a time, connected by pipes or hoses.

The preparation apparatus according to the invention is suitable for use in other purification processes, e.g. for the treatment of waste water from car washes. If the wastewater is heavily loaded with pollutants, such as when cleaning buildings that have been damaged by fire, a purge tank may be provided in front of the pre-chambers, in which the wastewater is pre-treated by changing the pH and adding flocculants and flocculants.

Claims (16)

Claims A treatment plant for treating wastewater, in particular wastewater from cleaning and / or high pressure jet removal operations, wherein the wastewater is passed through a plurality of chambers comprising filters or filter cartridges and comprising one or more transportable tanks. at least two pre-chambers for pre-cleaning / 3, 4; 34, 35 / which can be connected alternately or simultaneously to the wastewater inlet / 12 /. Preparation device according to Claim 1, characterized in that the two pre-chambers (3, 4) are connected one after the other, whereby the outlet side of one of the pre-chambers (3) extends to the next pre-chamber (4). Preparation apparatus according to claim 1, characterized in that the two pre-chambers (34, 35) are connected in parallel to a group (36 - 37, 38) of the after-cleaning end chambers (36, 37, 38). Preparation device according to one of claims 1 to 3, characterized in that a charge state control device is used for measuring the charge state in the pre-chambers (3,4), and in that a pre-setting valve (21) in a pre-chamber when the predetermined maximum position is exceeded. 22, the inlet closure for said pre-chamber and the inlet for the other chamber are opened. A treatment device according to claim 1, characterized in that it has two separate end chambers for post-treatment of wastewater / 6,7; 37, 38 / having openings / 8; 32 / are in permanent communication with the intermediate chamber (5, 36) located in front of the apparatus and which are the respective outlet (19, 20); 43, 44 / can be bypassed. Preparation device according to claim 5, characterized in that at least one of the end chambers (6, 7) has a lockable outlet (23) in the bottom of the end chambers (6, 7) which is provided with a filter element (24) / is covered. Preparation device according to Claim 5 or 6, characterized in that after the end chambers (37, 38) is connected a storage tank (45) which is connected to a fresh water inlet (46) and from which the high pressure boiler is fed. . Preparation device according to claim 7, characterized in that it has a means for measuring the filling status of the reservoir tank and for opening a fresh water inlet / 46 / valve / 47 / below a certain limit. 9. Preparation device according to one of Claims 1 to 18, characterized in that the waste water inlet has one or more distribution pipes (50) having a horizontally arranged pipe loop, of which pipe sections (54-58) are provided with alternating side outlets (59-80). . The living preparation device according to claim 9, characterized in that the sewerage pipes are made of elastically deformable material, are provided with continuous longitudinal slots parallel to their axis and are formed by rotating each pipe section about its longitudinal side so that the longitudinal slits are alternated. they form outlet openings. 11. Preparation device according to any one of claims 1 to 3, characterized in that a charge status transmitter of an automatic overfill protection is located in a pre-chamber, whereby when the maximum filling state is reached, the waste water supply is interrupted by switching off the pump or closing the inlet valve. 12. Preparation device according to any one of claims 1 to 3, characterized in that two flocculation chambers are connected in parallel to the waste water inlet into the apparatus, in which the impurities or contaminants can be separated by flocculation by the addition of a flocculating agent. 15. A serine according to any one of claims 1 to 5 - A pre-kneading apparatus, characterized in that the flocculation chambers are fitted with pumps for transferring the treated waste water to the pre-chamber of the apparatus after settling and sedimentation of the flakes. 14. Preparation device according to any one of claims 1 to 3, characterized in that the flocculation chambers form a separate unit which can be connected by wires to the pre-chambers of the device. Preparation apparatus according to any one of claims 1 to 14, characterized in that devices for holding agitators are applied to the flocculation chambers. 16. Preparation device according to any one of claims 1 to 3, characterized in that the flocculation chambers are provided with an aeration device which can be connected to a compressed air source. 17. Preparation device according to any one of claims 1 to 3, characterized in that there is a single pre-cleaning chamber after the two flocculation chambers.