SE1230114A1 - System and method for measuring and reporting fluid level oil and grease separators. - Google Patents

Abstract

SUMMARY Procedure for aft India water level in oil and grease traps (11) using a tar monitoring system, which carried food units (30 & 20) located in each separator, and a central unit (40) located adjacent to the separators, and a pH distance data storage unit located from the separators (43). The feed unit has feed heads (30) connected, a processor, a radio transmitter and a pulse circuit. The method comprises the step of the pulse circuit initiating a food sequence by sending an initiation signal to the processor, which food sequence carried the steps or with the food head feeding water level and converting them to physical math unit. The procedure further carries the step of initiating a reporting sequence which takes the steps of compiling a data message which includes physical math at level 116.0 and a unique identification number for the food unit, since the data message is sent to the radio transmitter which sends the data message as a radio signal inside the separator. from there and to the central unit, which receives the radio signal and forwards the level value and the identification number to the data storage unit which stores these in a database.

Description

Systems and procedures for feeding and reporting water levels in oil and grease traps.

The present invention relates to a system and method for maintaining the level of the oil layer in an oil separator or the level of the grease layer in a grease separator and also other water levels in the separator.

Oil, field and sludge separators are used to separate unwanted substances out of wastewater before the wastewater is let further into the pipe network which leads on to the sewage treatment plants.

The water that is to be led through an oil separator is expected to be polluted by petroleum-based products and can come from, for example, a car water, a so-called "do-it-yourself-hall" where attachments themselves perform simpler service on their vehicles, a workshop or service depot, a car scrapping plant, from industries of various kinds but also from parking lots, street intersections or heavily trafficked roads.

Water that is to be led through a grease trap is expected to be contaminated with animal and vegetable oils as well as fats, but also food residues of various kinds. The water can come from, for example, a restaurant, restaurant, a hotel, a hospital or a food industry, such as a charcuterie, a slaughterhouse or a fish industry.

The separators' operating principles, construction, design, installation and operation and dishes are described and regulated in Swedish Standard SS-EN 858 for oil separators and SS-EN 1825 for grease separators.

The separation principle is simple according to the gravimetric principle, it basically means that a container must be large enough to give a slow and calm flow of the wastewater so that initially heavy particles and solid components can sink to the bottom to accumulate as so-called sludge. Thereafter, lighter, non-emulsified or dissolved liquids, in the form of droplets of varying size, should be able to float to the surface so that they accumulate in the form of a liquid layer of oil or grease. The separators can be one or more consecutive with different mechanical construction and disposition.

In the following description, according to Figures 1 and 4, the construction and disposition of the separator is only described in principle, the design of the separator may vary depending on size and make but is not at all important for the invention described here intended to feed water levels inside separators. The method according to the invention for feeding water level is applicable in all types and designs of oil and grease separators which are based on the basic gravimetric principle.

The water flow out of the separator is formed on such a salt that neither sludge, oil nor grease should be able to fol. * With out. Sludge and oil and sludge and grease, respectively, must remain in the separator.

Over time, the accumulated separated substances will increase in quantity and must eventually be removed by oil, grease and sludge suction of the separator. In order to monitor that the separator is not used so that it is filled beyond what is intended for normal operation, some separators are equipped with usual equipment as a trigger signal in the event of abnormal conditions.

These existing alarm sensors are intended to detect two abnormal conditions, either layer alarms or dust alarms, separately with different devices.

Layer alarm is an alarm device that emits an alarm signal if the oil layer becomes abnormally thick, which can occur if the separator is not bundled regularly according to bulkhead instructions or if incoming wastewater contains a large amount of oil for which the separator is dimensioned.

Sensing alarm is an alarm device that emits an alarm signal if the static level in the separator has risen to a certain abnormal level. The cause of flooding in the separator can be a blockage in the drain pipe downstream. Some separators are equipped with a float-controlled shut-off valve to prevent the outflow of already separated oil if the amount of separated oil becomes too large. The complete stop of the effluent from the separator also leads to a flood in the separator.

Regarding the function of these occurring alarms, it can be said that all the enclasts are intended to emit light in operating conditions outside the normal, in emergency situations. Normal operation is not indicated in any way. As long as a catastrophic situation does not raid, no knowledge of the conditions in the separator is obtained. Furthermore, it is the case that if and when a catastrophic situation has arisen, existing technology provides no other information than just the indication that a catastrophic situation is imminent.

The invention has, in contrast to what has hitherto occurred, its function at present in that it constantly measures the levels expressed in height, for example millimeters. Thus, knowledge of the exact conditions is obtained at all times during all operation of the separator. You thus get a picture of the plant's normal function, how it is dimensioned in relation to the flowing volume of wastewater and the amount of oil or felt that is to be separated from the flowing water.

For the agar / user of the separation plant, the invention meant an opportunity to check that a newly delivered separator works as it should and is correctly dimensioned, and then to monitor and optimize the operation.

The invention also offers a plurality of freely selectable level limits in combination with a plurality of freely selectable time limits for creating attention, perception and alarm signals of various kinds such as sound, light, signaling via fire, data messages and SMS to mobile phones. If and when a condition in the separation process has been detected by the invention, by feeding, transferring the food result, analyzing it, and transferring it to one or more persons, another advantage is realized: When aitgard is to be performed, the invention provides information on how the situation has arisen , at what speed, as well as information about father moment prevailing conditions.

The invention also makes it possible to obtain monitoring and alarm emission from a single level supply with only one feed head and one feed unit for two independent operating cases, each of which can lead to two different abnormal conditions leading to the cessation of the separator function. According to the invention, a food head located above the part where the "static level" is located can detect different conditions, namely "dusting" and "lacquering". Leakage is detected by accumulations of the static level below the reference value can be observed, during normal or planned or for the purpose specially interrupted operating interruptions. Lowering of the static level below the reference value is an unambiguous indication of damage with the resulting leakage from the separator. With regard to the speed of the lowering of the static level, the invention also provides an opportunity to calculate the discharge rate of the lacquer. Delta is information that otherwise the agar / user of the separation plant can only obtain by calling in special consultants to leave a survey / investigation of whether the paint is paying. Such an examination is usually ordered by the environmental authority to be carried out at least every fifth hr.

With the invention, the operation and operation of the separation can be monitored continuously during normal operation and that emptying can be done proactively at the best opportunity. Furthermore, ordering of thinning can be done with knowledge of the conditions in the separator, ie. how much needs to be emptied, and that the result of the emptying with the invention can be checked before the invoice for the emptying makes sense for payment.

The cost of thinning is high, several kronor per kilo for "environmentally hazardous waste". It is common for even large amounts of water to be drained from the separator, with a subsequent charge of several females per kilo, even for a large part of the deli separator's existing water. Invoicing in the order of 50,000 females for a normal normal-sized petrol station oil separator from car water is not uncommon. With the invention, knowledge of the conditions is obtained, which can give the agar / user knowledge of whether the actual amount of "environmentally hazardous waste" has in fact been 20-50% of the stated amount. The contractor has sucked with a large amount of water and the invoice thus becomes popularly expressed "watered". It could be said that for a user / agar of a separation plant, a cup of an equipment according to the invention can be a profit already at the first sludge suction. Sludge suction is often, depending on the scope and type of activity, offered by the environmental authority as mandatory with an interval of 6-12 months, the invention offers the mentioned benefit of these offers Regarding the occurrence of alarms principle for detection so can be initially said that the detection is "water present "or" do not wash present ". It can be made with different types of mechanical floats that affect electrical devices to be closed or broken. There is also a type of electrical sensing that is based on whether water connects contact pins or contact wires and thus changes the resistance between them. Finally, there is also a probe that detects the presence of conductive liquid without galvanic connection through so-called capacitive detection.

Existing detection techniques are thus digital (onioff), the installation of where alarms are to be issued for whether the operation is abnormal or has ceased takes place exclusively through the suspension device. You feed in and hang the alarm sensor at the height where the oil layer is judged to be too thick in deep mat and for the dust land you hang the sensor at the height where the water level reaches when there is a total stop to the function. The invention measures, in contrast to what is customary, the level of liquid analogously and provides a quantitative mat represented by a food value in millimeters which expresses the thickness of the liquid oil or fat layer or the height of the water in the separator. The suspension of the feeding part of the invention, the feeding head itself, is used more to calibrate or one of the input levels with some physical reference level in the separator. Alarms are created from the input level secondarily and separately by comparing in a central unit whether the input value of the invention is above or below one or more set spruce values for a certain period of time, or periods of time. The different level and time limit values are also linked to different priorities, so that different degrees of attention can be given to, for example, remark value, abnormal or catastrophic operating conditions.

The most advanced kanda technology consists of externally current-filled electronic devices that can capacitively detect the presence, or not, of ambient water. They can not feed or emit the food value representing a level. These units have a composite structure because the electronics are assembled with the sensing elements. Power supply based on demand and power consumption is typically 5 or 15 milliamps, the valley presence of surrounding water is indicated by one or the other power consumption. Battery operation is excluded as the operating stick would be for a week, the life of using the best available batteries, and that in addition the power supply cables are needed for the unit to remove its result.

There are also known techniques which can detect sludge present or sludge not present under water by steaming a continuous ultrasound signal whether the feed head has been ignited by sludge or not. Power consumption based on demand and power consumption is typically 25 or 35 milliamps, where the presence of surrounding sludge is indicated by one or the other power consumption. Also for these, battery operation is excluded because the operating time would be a couple of days, and that the power supply cables are needed for the unit to slow down its output.

There is also known technology that measures with the help of sound or sound pulses, radar or radar pulses, but that technology is so expensive, complicated and sophisticated that it is not used for oil or grease traps. Furthermore, the invention differs from this technology by its non-existent power consumption, the abolition of connections to external TIMs for power supply and the delivery of the results. The invention already uses known physical properties for propagation of a sound pulse air and liquid, but this is done by a new and simple method and device which has not hitherto existed. The invention is easy to install, and then automatically in its function.

Compared with prior art, the invention meant that it did not need a power supply for its function, nor a connection to external units in order to deliver its result. The result is also a feed that is delivered as a quantitative millimeter mat, which in a number of subsequent steps can be processed, analyzed, generate newly created information and attention signals with escalating priority.

The feed of the invention is based on a feed head 30, which in a cable hangs above a layer whose level one wishes to feed, or which in a cable hangs down in the liquid oil or grease layer, alternatively that it hangs down through another liquid or water surface in the separator. The food head is completely passive and does not need 4 power supplies, the food head includes a unit that can emit a few individual sound waves, in the form of a shock wave or pulse, and a unit that receives echoes of these sound waves. In between there are steaming materials that separate these two units, and some of the bearing substrate is designed for salt so that vibrations from the unit emitting sound waves should not be propagated to the receiving unit. A feeding unit 20, sends some waves through the feeding head 30 and listens to and analyzes echoes received at the feeding head 30. If one or more echoes are filtered out as an input of distance and level, the feed unit 20 rakes them back to physical matte. These mats are digitally filtered to be stable and reliable. These filtered mats are sent off with a radio signal. The feeding unit is constructed on a special salt according to the invention, so that an average power consumption of only a few millionths of an ampere is required. This means that power supply can take place from a built-in bath with a high degree of maintenance freedom. In some cases, no external connections need to be made, which leads to a number of additional traditional problems and complications being eliminated, which will be further developed in the following. In practical experiments, the invention has been shown to be able to function and continuously deliver the food value for 5-17 years without supervision.

The separators are often coated Mom zon clar risk of explosion by ignition of explosive gases firms. All electrical installations, connections and networks involved risks, problems and complications with regard to the risk of explosion. Delta is regulated by the Swedish standard SS-EN 600079-0. By realizing the method of the invention in the delta described technical embodiment, all traditionally occurring problems and risks are eliminated.

The invention does not need a power supply from the outside for its function, part eliminates the need for connection to external power supply. Furthermore, the invention does not require galvanic connection to signal lines or networks for relieving its input level of the oil layer thickness or water level. In addition to part, the invention feeds liquid or slurry miva without all being in galvanic connection with the liquid. These Irish conditions make it possible to avoid problems with electrical potential differences between different electrical natures, as well as risks of sparking and heat generation in the event of loose or defective electrical connections. Connections and relays of electrical cables are black or down in the dirty congestive humid environment that raids in a separator, which may contain explosion-prone gases.

Furthermore, the invention eliminates the risks that exist when lightning strikes cause large potential differences Mom hundreds of meters away in the surrounding ground, which can be led into the separators by cable routing and ignite explosive gases through sparking. The invention eliminates all these risks and associated traditional problems with earthing etc. to avoid these risks.

Finally, the invention eliminates the need for digging, channeling and cable routing to bring supply voltage to the separator and for all cables laid to carry the input signals and feed values. The purpose of the present invention is to solve the above-mentioned problems, to create the above-mentioned improvements and to provide a system which allows a continuous supply of layer thickness, water level and slamnica. which allows a proactive handling of the non-nal operation of an oil or grease separator. As well as a better detection of abnormal and catastrophic operational cases and the transmission of various types of escalating attention signals.

The system according to the invention is characterized in that, for each separator, it comprises one or more feed units which are anonymous in the upper part of the separator above the water surface. This feeding unit has connected to it one or more feeding heads, which for feeding the level below the liquid or sludge are designed to have a sound pulse sent out, after which the echoes of that pulse are analyzed in time by a feeding unit to determine levels of water sludge and sludge. . The feed head can be hung above a liquid to feed its level, or immersed in a liquid such as the oil layer, to feed its thickness and the underlying sludge level, or submerged in the water to feed the sludge level.

Usually, the level of the boundary between the oil or grease layer and the underlying water is of interest as a measure of the amount of oil or grease separated. Furthermore, its so-called static level is of interest, as raising it indicates a downstream stop, as well as lowering it indicates damage to the separator which has resulted in subsequent environmentally hazardous leakage out of the separator.

The feeding head does not need to be adapted to the type of feeding to be done, the suspension determines what is to be fed. If feed is paired above or below a water slide, the sound speed is different, which can be detected automatically by the feed unit. Furthermore, there is a temperature supply for a fine adjustment of the sound speed.

The method according to the invention can be characterized by the steps: that the at least one level is monitored with the aid of at least one feed head which is connected to a feed unit, which is arranged to feed and analyze echo signals from the pulse receiver's pulse receiver. that each feeding unit with its one or more feeding heads is a completely independent unit that does not need to be connected to anything for voltage supply or for its function, nor does it need to be connected to anything for delivering its information. that the food unit or food units via radio forwards made measurements to one or more central units which, with radio receivers, collect all messages with information about individual feeds. The entries made are individually identifiable and unambiguously economical. that in one or more of these central units storage and comparison of the value for the input level takes place with a plurality of spruce values with associated time limits. In the central unit, the measurement value from each individual food head can be treated separately and compared with one or more boundaries, both in terms of level and time. The time for how long a value is greater or less than that of a spruce mat and if the time exceeds an individual predetermined time interval, signals or alarms can be issued. On central units, individual levels can also be read locally on a display.

It must be observed that no additional installations of power supply, signal or network cables need to be made to or at the disconnector or disconnectors. This meant a great installation advantage. Furthermore, a practical embodiment of the feeding unit of the invention with strong magnetic fastening which with 6 usually 2x10 kilos of traction fastens to the manhole cast iron set is preferable, where installation of a feeding unit with associated feeding head has been shown to take only 10 minutes.

Hitherto, without the invention, it is not uncommon for a petrol station manager to invest in an excavation contract between an oil separator and a station building with cable routing, where the cost can typically be in the order of SEK 50,000.

Preferably, the central unit can be placed in the station building at a gas station, practical tests have shown that the invention can communicate reliably from a feed unit under a cast iron manhole cover to the cash register or office in a station building 30 meters away. The invention also allows the use of so-called repeaters for retransmission and thus amplification of signals from feed units into central units. Each step that follows a message via a repeater adds an additional 100-200 meters range, with a clear view between the antennas.

Preferably, the central unit is arranged to forward the received information to a data storage unit, where a database containing current as well as historical information about and from each individual food head is maintained. Preferably, this database is accessible from ordinary computers and mobile phones with web browsers via the Internet, so that one can easily see from any computer connected to the Internet any level of the disconnectors connected to the system. Since all levels are reported, their snail significant changes intrader sit receive a complete picture in time of all processes, this up to the instantaneous value in real time. This information can be used to obtain knowledge about the individual dimensioning, load and function of the separators. Based on this knowledge, you can adjust the emptying of them to the range and quantity and it is possible to save large amounts. In the event of abnormal and catastrophic operational situations, one can easily and quickly go back in time and see how the situation has arisen and how it develops, in order to make informed decisions about appropriate measures.

In addition, as the year progresses, all stone requirements are set for quality assurance, documentation and follow-up of self-inspection in accordance with directives for businesses that have mandatory oil or grease separation of their sewage discharged to the municipal sewer network. The system by the invention offers all this, which has not hitherto existed.

Knowledge according to the above about range] and quantity expressed in levels, can with the aid of the invention be obtained about each individual separator's individual levels and their dynamics in time. With this knowledge, it is possible to enter a number of spruce swords in the central unit, which are individual for each separator. On the one hand, you can set the spruce guard that acts as an "order point"; From now on, ordering of thinning must be done, partly you can set a limit for "full", partly you can set a limit for "alarm, downtime". The invention allows this gradual escalation in attracting attention to be achieved.

As is often the case today, a petrol station can have a stop in the drain from car water because the separator has become full, or due to operational disturbances in the drain it has not been noticed before it has been stopped, with the result that car water has to be shut off. A petrol station's laundry traditionally accounts for a large proportion of the station's financial refueling allowance, and a shutdown at the station is conducive to the station's finances. The invention gives the station manager the opportunity to avoid these downtimes.

The invention will be described in more detail below with reference to the accompanying patent drawings, referred to in Figures 1 to 4.

Figure 1 schematically shows a preferred embodiment and location of the feeding units in a system according to the invention.

The separation tank 11 is challenged for gravimetric separation of sludge by sedimentation, as well as fat or oil by flotation. The separator receives a flood of contaminated water, which during a slow flow sediments and accumulates sludge 13 and oil or grease droplets which float to the surface and accumulate to an oil or grease layer 16. The water continues slowly towards the outlet 19. Finally, the water, freed from the stone part sludge and grease or oil, leaves the separator through the outlet 19.

Inside the oil separator is the static water level 15, which is determined by the outlet 19 Mid and which under normal operating conditions is relatively unchanged. The static water level rises at the stop necistroms outlet 19, or if the separator is designed to meet high government requirements, by blocking the outlet with rafts if the oil layer becomes too sufficient. Mechanics for blocking the outlet are not provided in this principal Figure 1, since for the purposes of the invention it is tantamount to a stop downstream of the outlet 19.

Often an oil or grease separator 11 is placed underground and is often due to a manhole cover resting in a collar or sate 12 which is made of cast iron. In practical terms, it may be a good place to place the feeding unit 20 of the invention, which can advantageously be fixed with magnetic fastening 27 with a large% of naafi.

From the feed unit 20 hangs a cable 21 which partly functions as a suspension for the feed head 30 of the invention and partly functions as an electrical connection for sending pulses to and receiving signals from the feed head to obtain information about the distance to the underlying liquid, as well as its level.

In order to roughly adjust and calibrate the height of the feed head 30, a loop can be made on the cable 21, or alternatively it can be hung on it with a fork. the fastening devices 27 of the food unit 20 can then be fine-tuned to millimeter accuracy by sliding the food unit 20 up or down on the cast iron set 12 until the exact desired height of the food head 30 is obtained.

The feed head 30 is designed so that very weak signals are detected, it is therefore advantageous for the cable 21 to choose a shielded or coaxial cable which by its construction is not affected by external factors such as deposited condensation, moisture and dirt outside the cable and This type of cable shields external electrical signals and fait.

From the feed unit 20, radio messages are sent out with input level information to one or more central units 40. 9 In the event that the feed unit is placed as 20a, with the feed head 30 hanging as 30a, then the "static level" will be maths. Elevations in that level beyond the "static level" proactively indicate downstream stops during formation or operational disturbances as well as occasional extreme floods in addition to dimensioning and level increases due to stops caused by any shut-off mechanism activated by overcrowded separators. The food unit 20 or the central unit 40 is programmed so that decreasing distance between the food head and the liquid below meant a rising static level 15. In the central unit 40 the monitoring of the level can be programmed so that for example if the level rises to the level 18 an alarm is issued for dusting. The invention can also proactively emit an alert signal at levels between 15 and 18 in combination with time indicating that a stop is about to develop.

In the event that the food unit placed as 20a with the food head hanging as 30a reports a level below the static level 15, then alarm for "leakage" can be issued, which is a double function from the location 30a of the food head, otherwise only specially called consultants with special equipment has been able to give the user user that control in the event of a downtime that has been introduced for delta andamhl. Equipment according to the invention with programmed charging limits for the seven-static static level will automatically check the leakage at each natural downtime that occurs, for example, on nights and major weekends. The location of the feed unit according to 20a with the feed head according to 30a shall be such that the feed head 30 rises above the dust level 18. If the static level 15 falls below the level 15L which is reached during leakage with the minimum volume flow to be detected during the downtime take, then the central unit 40 emits an alarm for it, with the indoor tables "lackage".

The invention comes with the above location where the food head 30a hangs in the air, in practice probably will not be able to provide any information about the conditions below the water level 15, which on the other hand will be obtainable with any of the locations b and c explained below. manual adjustments in the feed unit 20 to handle distance feeding in air and distance feeding in a liquid, so the design of the invention allows the feeding head 30 to detect the difference between air and liquid by feeding the incoming signals from the pulse receiver 33 while the pulse is emitted from the pulse sensor 32. If the direct response comes earlier, it indicates the liquid, otherwise the surrounding media is air, after which fine adjustment of the conversion from the eco-time to distance takes place based on the temperature which is also fed with the food body for temperature which is coated in the food head 30. the food unit is placed as 20b , with the food head 30 hanging like 30b s, the thickness of the oil or grease layer will be reduced. The condition for the feeding arises when a part of the pulse emitted by the feeding head is reflected in the spruce layer 14 between the layer of separated oil 16 and the underlying water. This reflection forms a weak echo whose time delay is converted to a thickness of oil. or the fat layer. The feed unit 20 or the central unit 40 is programmed so that the lid for returning the echo meant a row thickness of the oil or grease layer 16. In the central unit 40 alarm limits can be set which give the desired attention signals, for example that thinning should be ordered and that the separator is full and downtime.

In order to ensure a maximum exact feeding of exactly the thickness of the oil or grease layer, a placement of the feed head 30 according to location 30b must be made so that the cable 21b must not be suspended from the feed head 30b.

Instead, the cable is attached to salt salt which is partly drawn in Fig. 1, namely all the cable 2 lb is slightly too long and the middle head 30b is fixed in a float or floating body resting on the water surface 17. The floating body is not important for the invention, therefore the dashed line indicates that it is a possible alternative in the practice of the invention, the invention together with a floating body allowing the highest possible accuracy in the feeding of accumulated amount of oil in an oil separator. A buoyancy body is as salty as possible. Easy to increase the yield of the invention A part of the pulse from the feed head 30b then continues neatly through the spring layer 14, further through the underlying water to be finally reflected against sludge 13 lying in the bottom of the separator. is arranged all identify and feed in two consecutive echoes so the measuring unit reports not only the thickness of the oil layer 16, but also the distance down to the bottom of the separator accumulated sludge 13.

When the unit of measurement 20b analyzes the variation of the strength of the echo signals in time shaved from the emitting south of the pulse, not only maxima representing strong echoes from jump layers are of interest, but also intermediate minima These minimum signal strengths represent the amount of impurity between the jump layers lying water. With the placement 20b and 30b, a coarse matt pt underlying water quality can be obtained.

The possibility of usably feeding these conditions depends on signal strength and the less clear the jump layer into the sludge 13 is, the weaker and more defined the echo response becomes. If the quality of the water is of great interest, or if part of the deposited sludge 13 is of a fraction with a fine and also varying grain size, then available signal strength is decisive. In some cases, the measuring unit and the measuring head according to the invention can be placed as 20c and 30c.

Maximum strength is obtained in the valley on the echo from the still water-dripping oil and grease droplets as well as sludge particles as well as underlying possibly diffuse leaking layers partly on the bottom deposited sludge 13.

Feeds through the reception of echoes are choices with applications such as radar, sonar, sonar, etc. The invention contains a method and apparatus which, in contrast to hitherto known technology and applications, enable a significant improvement of the feed-offs for all practically able to handle these measurements inside the separators, with small effects, with Invisibility to echoes, without connections to external nds or cables, without risk of explosion with high degree of automation and maintenance freedom.

The invention emits the measured value at the height of sludge 13 accumulated in oil and grease separators, where different graded attention signals can be emitted. The ground for these alert signals is programmed into the central unit 40 based on the manufacturer of separator 11 recommended values for degree of filling.

The central unit 40 compares all received values with land boundaries that have an associated time limit and priority, all conditions of interest for the operation of the separator can be monitored and from the outside, attention can be paid with escalating priority. The invention offers the possibility, with one and the same equipment, of measuring, monitoring, journal forums and attentive and finally teachers; Amount of oil or barrel accumulated in the separator 16.

Dusting indicating fleet shutdown or outlet 19 downstream stop.

With water filled 18 separators.

Lacquer 15L due to damage to the separator.

The amount in the separator accumulated sludge 13.

Lots of oil and felt drops and liquid sludge particles in the water.

Temperature lime in the separator or in the sinks.

Without the invention, it is customary to manually "gauge" the sludge content of oil or grease separators by simply stopping down a long stair stick and karma after, partly it is a manually required effort, partly no knowledge is obtained before such bearing Ors and also not daremellan. Figure 2 schematically shows a preferred embodiment of the food unit 20 according to the invention. The food unit or food units are mounted in the separator above the water surface or outside the separator near it. It is practical to prefer if the distance between the feed unit 20 and the feed head 30 can be kept shorter than 5-10 meters in order to keep the self-capacitance and signal damping of the cable 21 as small as possible. The signals to the feed head Or weak and from the feed head even weaker and a long cable gives pre-assembly of the signals. The weak signals have the advantage of explosion safety, which will all be developed separately in the future.

It can often be practical to mount the feed unit 20 against the cast iron set 12 which is usually present for the manhole cover which thanks to the manila of the separator]. For this anclamal, fastening devices 27 of strong magnetic type can be practical. There is the magnetic fastener with a hall force of 350 Newton against smooth surfaces that can give a hall force of 100 Newton against the large radius curved cast iron set.

The food unit 20 comprises a batten in 22 which is arranged to drive the parts included in the food unit 20.

The feed unit 20 further comprises a feed circuit 26 which is designed so that it partly generates the pulse which is transmitted, and partly receives and amplifies the echoes which arrive shortly after the pulse is transmitted.

The emitted pulse is initiated by the processor 28 and is very short, only a few oscillations, to enable a high resolution in the feed. The emission in water or liquid is done by the feed head 30.

Initially, an immediate direct signal comes from the feed head 30 which, due to the design of the feed head according to the invention, is the weakest possible and where the lack of direct waveguide in the substrate allows a detection for the processor of whether surrounding media is air or water.

Then weak echo signals return from the feed head 30 to be amplified in the feed circuit 26 and then analyzed by the processor 28. The processor looks for peaks which result from reflections against different boundary layers in the separator. These peaks can be determined by the processor in time by the processor noting the time between transmitting the pulse until the echo peak returns. In between, minima can be identified, whose signal strength constitutes a measure of the amount of loose particles and droplets in, for example, the water. Wining of distance, boundary layers and content through echoes Or kand itself and will not be described further has. However, the invention places demands on the design of this supply and the arrangement of the apparatus.

The invention means that the said feeds can be made with low energy access, so that external supply of current is not required. The electronics that supply the supply must be completely passive between the food incidents, but must when activated very quickly carry out their supply and that with a low power consumption. For example, the supply circuit 26 is active for only 30 milliseconds and consumes only 5-50 mA during this time.

Furthermore, the invention contains radio transmission 23 to deliver the result 24 so that no signal cables or connection to the network are needed. The combination of the features of the invention means that the supply becomes independent of external connections, which in turn leads to the invention being designed to offer Iva additional pitches; No risk of explosion, and a simple installation procedure.

The feed head 30 is also completely passive, it contains no active electronics and does not need to be supplied with power. The signals to and from the feed head 30 passing through the cable 21 must have a weakness which means that they cannot ignite explosion-prone gases should the cable 21 be damaged, cut off or short-circuited.

The feed unit also contains the temperature feed circuit 29 for being able to feed the temperature at the feed head 30 which can be used as information about the separator process, and for the processor 28 to be able to correct the speed of sound in the calculations made by the processor. The temperature supply can also be important for the agars / users of the separation plant, as problems caused by freezing can occur in winter. Temperature feeding can proactively help avoid these problems.

The supply unit 20 further comprises a processor 28, which is connected to the supply circuit 26 and the temperature supply circuit 29 for receiving signals which reflect the water level and the temperature value, respectively. The processor 28 is programmed to, at each measurement time, shake the received signal to a physical level, preferably in millimeters, between the feed head 30 and the underlying spring layers 18, 17, 15, 15L, 14 or 13.

The shaking can be arranged in such a way that a calibration is performed at the time of production. During calibration, the processor feeds kanda levels and saves in its memory constants and parameters that are subsequently used for the recurrence of future food cases. After this reshuffling, the input value is still not usable as a value representative of the level, the values fluctuate in practice and have superimposed noise and hum. Dad & Ors a digital filtering of the input values to obtain a type of rolling average value, after this filtering the invention provides a stable, accurate and thus usable level value.

The processor 28 is further programmed to compare the level value and the temperature value from the current food event with the level value and the temperature value from the previous food events, respectively. If the current level value differs from the previous level value by more than a predetermined level, which may be, for example, 5 millimeters, the processor is programmed to report the current level value and the current temperature value by compiling according to data message, which includes said current level value and temperature value and eft for the food unit 20 unique identification number.

Likewise, the processor 28 is programmed to compile such a data message when the integral of the difference between the level value last reported by the processor 28, i.e. the level value that the processor 28 last included in a data message, and the current level value exceeds a predetermined level threshold value, which may, for example, be in the range 5-10 mm. This salt to monitor the level meant a communication saving without the latest reporting level values in the central unit 40 being misleading. In the case of small changes in the level value, a report thus takes place, even if the level change between two food cases is very small, as long as it is persistent and thus significant to report. 14 The above-mentioned reporting caused by level changes will in the following be further elucidated with the aid of an example, where it is assumed that the most recently reported temperature value is 100 mm and the level limit value is 7 mm.

Assume that the measured level at the next measurement supplement after reporting is 105 mm. The difference between the last reported level value and the current level value is then 105-100 = 5 mm and the integral Over the difference values, ie. the above-mentioned integral value, is consequently 5 mm The integral Over the difference values is thus smaller than the level limit value and no reporting takes place.

Assume that the measured level value at the next measuring fill is 98 mm. The difference between the most recently reported level value and the current level value is then 98-100 = -2 mm and the integral over the difference values is consequently 5-2 = 3 mm. The integral Over the difference values is thus still smaller than the level limit value and no reporting takes place.

Now assume that the measured level value for the next food case is 106 mm. The difference between the last reported level value and the current level value is then 106-100 = 6 mm. The integral Over difference values are consequently 5-2 + 6 = 9 mm, ie. stone an nivagransvardet, and reporting takes place.

The invention thus has a reporting, which is controlled by the input course of action in level and temperature, takes place from the feed unit 20 in such a way that the last received value in the central unit 40 can be considered to represent a radiating situation in the separator 11. this latest report. This feature of the invention makes it possible to dispense with food topicality as follows; A small amount of reporting of the food value, which in turn allows a small power consumption, which in turn allows battery operation, which in turn provides independence from connection to power supply and signal cables, which in turn eliminates slimming of risks of explosion.

The only physical relationship that could nullify participation so far described in the invention are variations in the process dynamics of the Iran time to time relationships within a separator or between different separators. Popularly speaking, one can say that the process dynamics could vary from "roller coaster" to "quiet street". Methods of the Invention Wen steps in dealing with and eliminating problems of such differences in process dynamics. The food unit's processor 28 calculates the number of reports sent per unit of time, preferably per day, and compares the number of reports sent with a pre-stored drill value of the number of reports per day that are equal to the number of copies sent. If, at the turn of the day or comparable, the number of reports in the last 24 hours exceeds the drilling value for many reports that are quarterly all emitted from the food unit 20, then it indicates that all process dynamics are volatile, lively, agile, or too dynamic in relation to the above level level reporting. Darfbr rams nivagransvardet up, ie. the food unit 20 Ors less probable for variations in temperature and level values. Delta adapts the food unit's trade-driven reporting to a process that has a high dynamic range, which is rich in business.

On the other hand, if there is too little number of reports per day in the same way as before, the probability of the food unit 20 is increased by lowering the level threshold for reporting. Delta adapts the food unit's trade-driven reporting to a process that has a small dynamic, such as trade-free.

This change in the level threshold can be carried out on the basis of empirical knowledge that ar- value and drill value in a simple line mathematical pre-equation gives the change in level value, and that in practice it has proved quite possible that Ora a "dead-beat" regulation, i.e. that in a single conjugation the whole difference is "killed", given that no further changes in the process dynamics take place during the next unit of time.

Practical tests have shown that in production the level limits for reporting quickly, Mom some days, Mom the framework of the invention adapts well to process dynamics of essentially different kinds, and that food units 20 in practical operation follow their food object's 11 variations in dynamics pit one good sat. In conclusion, it can be said that an object's 11 differences in dynamics over time in general are significantly smaller than the dynamics of different objects, ie. all the individual differences itr avsevart stone an differences in the same individual 11 Over time. The invention addresses and addresses these two variations with a minimum of reporting as a result. Delta expressed on the above pages is formalized in claim number 5.

Preferably, the live processor 28 is programmed in each data message to include a unique message number for the current data message, information about the battery voltage of the battery 22 and a so-called CRC sum (cyclic redundancy check), ie. a cyclic checksum, which is intended to enable control in the central unit 40 of whether the data message is correct in content or large.

The processor 28 is further programmed to send the composite data message to a radio transmitter 23 included in the feed unit 20, which in turn is arranged to send out the data message as a radio signal 24 intended by one or more central units 40.

If the current level value or temperature value does not differ from the previous level value and the temperature value, respectively, the processor 28 will not normally compile the above-mentioned data message, in which case the radio transmitter 23 will also not receive any data message to send out. On sale, the food unit avoids consuming energy by reporting that no change in levels in the separator has occurred. However, if no change in level or temperature is detected over a long period of time, for example Mom 1-4 hours, the processor 28 is programmed to compile a control message, which includes information on all of the importance of reporting, but of the feed unit 20 functioning properly. .

The feed unit 20 further comprises a pulse circuit 25, which is connected to the above-mentioned bat 22. The pulse circuit 25 is also connected to the feed circuit 26 for level, the temperature feed circuit 29 and the processor 28 so that at predetermined intervals, which may be once per minute, once each tenth minute or some other interval, initiate a food sequence and possibly a report sequence by sending an initialization signal to the processor 28. A food sequence which, after initialization of the pulse circuit 25, is controlled by the processor 28, thus consists of reading the temperature food circuit 29 and then signals from the food circuit. 26 obtained commodity change is extracted and then the so-called ravardet is converted to physical nivavarde. After that, a digital filtering takes place. The processor then makes comparisons of the changes in temperature and level values, respectively, to assess whether reporting should be made. A reporting sequence which, in accordance with the above description, is performed only if there is a significant level or temperature change or if a predetermined time has elapsed since the previous reporting, thus consists of the processor 28 compiling the above-mentioned data message or control message and the radio transmitter 23, after voltage from the processor, transmits the above-mentioned radio signal 24 including the data message or the control message. After transmitting, the processor removes the voltage from the radio transmitter 23.

The processor 28 is also arranged aft after the food sequence and the possible report sequence continued the level food circuit 26, the temperature food circuit 29, the radio transmitter 23 and itself 28 in a passive idle state as they have performed their respective tasks, which idle state continues until the pulse circuit 25 initiates the next food sequence. The time required for a feed sequence is about 30 ms and the time required for a report sequence is about 300 ms. Thus, the time from the pulse circuit 25 initiating feeding until the processor 28 continues the level feed circuit 26, the temperature feed circuit 29 and the radio transmitter 23 in idle state is normally 30 ms if nothing is reported and about 300 ms if a radio message is sent. Since the timing of a food and reporting sequence is only a fraction of a second, and since the sensor circuits 29 and 26, the processor 28 are energized via the pulse circuit 25, which consumes only about one millionth of an ampere frail the battery 22 during the idle state, the energy requirement of the food unit 20 is extremely low.

The function of the pulse circuit 25 for saving the bat is thus preferably supplemented by logic in the processor 28, so that radio messages 24 are transmitted only when significant changes have occurred or when a predetermined time from previous reporting has elapsed. In this way, the feed unit 20 needs to be active only for a very short time, typically 30 ms, and only exceptionally slightly longer during radio transmission, typically 300 ms. The battery 22 thus has a lifespan of four to seventeen years. This in turn is the basis for a number of further features of the invention which are described in the following, as well as in the claims.

After emitting from the radio transmitter 23, the radio signal 24 bounces against the separator's internal cracks and water surface 14, 15, 17, 18 and also the manhole cover with cast iron set 12. The radio signal thereby affects the manhole cover, often of cast iron, which in turn retransmits the radio signal. The signal is therefore sent out by the radio transmitter 23 with great strength in the enclosure which the separator entailed, in order to be detectable by one or more central units outside the separator within a reasonable distance of usually about 50 meters. If the distance should be stone, or if the radio signal becomes unusually much steamed, then one or more repeating units, which receive and retransmit the message in pre-amplified condition, can be placed between the separator and the central units. For this type of data message, for example, any of the frequencies 916.5 MHz, 868.35 MHz, 433.92 MHz, 418.0 MHz, 318.0 MHz, 315.0 MHz or 303.825 MHz can be used. In Sweden, it is preferable to use any of the license-free so-called ISM (Instrumental, Scientific, Medical) frequencies, 434 MHz, 868 MHz or 2.4 GHz, and most preferred is to use the lowest 17 frequency, ie. 434 MHz, since it is retransmitted from any intermediate metal form such as manhole covers with the least evaporation of the signal level.

Figure 3 shows a drawing of a preferred embodiment of the feeding head 30 according to the invention. The drawing is scaled with the scale 1: 1 and challenge in Irish projections.

It can be that practical experience leads to a wider head being made wider, with a stone distance between the pulse sensor 32 and the pulse receiver 33 if even better properties are sought and / or needed. Figure 3 can be said to be a drawing for a construction of the invention which provides small outer mats while maintaining desirable properties according to the invention.

The overall invention has unique properties in that only low voltages and currents are present, which provides explosion safety, furthermore because exceptionally low power consumption leads to the boat being usable. The implementation of delta is made possible, among other things, by how the construction of the food head 30 of the invention is realized. Della is realized by the fact that the feed head is a completely passive construction which contains only a pulse sensor 32, a pulse receiver 33 and a component for temperature sensing, according to the so-called NTC resistor, not drawn.

The emitted pulses are very weak in relation to kand technology. In order to enable the reception of the even weaker echoes from these weak emitting pulses, the invention is thus, as far as the food head is concerned, that emitting a pulse in the least possible manner must increase the reception of echoes from the emitted pulse. According to the invention, a pulse is emitted which is so short, only 3 cycles, or it can hardly be characterized as sound or a fluctuation in traditional sense. Despite this, the pulse-emitting component 32 will continue to vibrate, and the goods to which it is attached will all vibrate and also propagate the vibrations. The embodiment of the invention is intended to minimize the possibilities of the resulting vibrations of the transmitted pulse from reaching the pulse receiving unit 33 as these would large or drown out the weak echoes to be amplified, detected and analyzed by the level food circuit 26 and the processor 28.

According to the invention, the pulse sensor 32 and the pulse receiver 33 are mounted on a thin substrate which, as far as possible, conducts mechanical shock waves, high-frequency vibrations or sound waves. In addition to the fact that the substrate is thin with in practice a thickness ph only one or eft a few millimeters, so it has a specie]] design as an "M". Partly there are Iva sentences with that utfonuning, partly the physical wave between the pulse transmitter 32 and the pulse receiver 33 becomes long, given the outer mat 70x80 millimeters, sh becomes a "wave" wave in the substrate at least 140 millimeters long. On the one hand, the design which, according to the "M" shdan de Ire lcnan "which exists between the pulse sensor 32 and the pulse receiver 33, stops, or at least substantially steams, further vaginal spread. Part first knob 34 can be taken as an example: A wave from the pulse sensor 32 which propagates backwards and up in the substrate comes to part the first knuckle according to the arrow 34. The scales are concentrated by forming the substrate to the tip of the knuckle, where it partly continues out into the surrounding liquid in a radiant shape, partly is reflected back to a smaller part. which is a fraction of the wagon that approached the knuckle, takes only half of the wagon towards the middle, towards the continuation of the substrate leading to the pulse receiver 33. Furthermore, on the same salt a reduction takes place in another Iva knuckle, where the middle knuckle also has the design aft lead a reflected wave completely away, up jams with the cable 21. The result is the design of the invention of the substrate which fixes the pulse emitter 32 and p The pulse receiver 33 provides, as little as possible, a wave for shock waves, high-frequency vibrations or sound waves to reach the pulse receiver and thus increase its reception of the weak echoes to be analyzed and converted to the level food values.

Remains a direct vague for the pulse emitted from the pulse sensor 32 to go directly to the pulse receiver 33 through the media consisting of air, water, oil, grease or other liquid present in the separator surrounding the food head 30, and into the pulse receiver 33.

The embodiment according to the invention and Figure 3 are all the substrate 31 designed to be at all at the same time a holder of a vaginal propagation shield 35. The shield is located between the pulse sensor 32 and the pulse receiver 33, in the surrounding medium for pulse / vaginal propagation, and shields direct vaginal propagation from the pulse transmitter 32 to the pulse receiver 33.

In this way, the pulse receiver 33 is isolated or shielded as far as possible from direct influences from the pulse emitted by the pulse transmitter 32, to the shape of the pulse receiver 33 receiving the weak echoes returning from the pulse propagating outward and its wave reflected against different strata.

The embodiment of the invention is such that all listening for echoes can be started at the same time as the pulse is transmitted. Della together with the above-mentioned design of the entire feed head means that the pulse receiver will first be affected by a direct signal, where the displacement and strength of this direct signal Or so that the processor 28 can determine the surrounding media's sound speed with an accuracy that Or lillrOcklig for alt be able to determine what type of media surrounding the mahu head. Thereafter, in the programming 28 done, the temperature supply 29 can be used to adjust the speed of sound for air and water, respectively, which varies by 0.18 and 0.29% per degree, respectively.

A practical embodiment according to the drawing Or aft the substrate 31 may in addition contain line connections 36 for the necessary electrical connections between the cable 21 and the pulse sensor 32 and the pulse receiver 33. On the same salt the component for temperature sensing on the substrate is suitably arranged.

The cable 21 is suitably selected to all contain two pairs of individually shielded cables, one pair for outgoing pulse, one pair for the extremely weak pulse echo, and one pair for the temperature sensing. With the practice of the invention, it is important to eliminate at all costs the impact of external disturbances, hums, and noise.

Furthermore, Or said a preferred embodiment to fix components such as the cable 21, the pulse transmitter 32, the pulse receiver 33 and the carriage spread shield 35 with cable ties 37 in accordance with the drawing. The embodiment can finally be taken and fixed by all dipping in a viscous hardening rubber mass.

Overall, it can be said of the embodiment of the feed unit 20, with its cable 21 connecting the feed head 30, described in Figures 2 and 3, that it is advantageous from an explosion safety point of view that the whole arrangement has a surface which has low conductivity, no connections for ground potential equalization need be made. . However, on the other hand, the conductivity of the invention is not lower than 1 GOhm according to the Swedish standard SS-EN 60079-0 section 7.3.2 in order to avoid static charging. A feature of the invention is that the now mentioned units 20, 21, and 30 do not need to be connected to power supply nor to any form of signal cable or network for delivering the food results. The invention, as described in claim 8, is furthermore given an embodiment so that the Irish units 20, 21 and 30 cannot be connected to ice, because the battery is encapsulated, inaccessible and protected from damage and pentianently connected, and all circuit breakers are missing and the feed unit is openable. encapsulated and filled with grout. Participate in obtaining after execution where there is no risk that explosions may be initiated by the invention. This design makes it possible to consider these three coherent parts of the invention as a so-called "simple product" which is so simple in its construction and operation and has no risk of ignition of a surrounding explosive gas because it does not have to undergo such a process. called EX classification. That "simple products" are not covered by Directive 94/9 / EC, and why, is described in more detail in the Directive, especially in section 5.2.1. In some cases, the combined parts 20, 21 and 30 of the invention may not be realized in practice as "sufficiently simple" from the point of view of explosion classification, which means that EX classification will still be needed, then the embodiment of the invention and a gain in classification will be simplest. possible and according to the invention the best possibilities should be classified in the most advantageous possible group affiliation in the groups Group I Apparatus, Group IIA Apparatus, Group IIB Apparatus, or Group IIC Apparatus. In the same way, the invention in the described embodiment has the greatest possibility of being approved for use in the most explosive environment, as categorized by Zone 0, Zone I or Zone 3.

Figure 4 shows a system according to the invention in which one or more feed units 20 according to figure 2 form in each separation tank 11, where also a plurality of separation tanks can none, with reporting up to a central unit 40 and further up to data storage unit 43 ph Internet.

It is common for a plurality of separation tanks 11 of different types and with different functions together to form a chain for water treatment and also as is the case with, for example, washing plants for vehicles with a recirculation of water through a subsequent treatment plant for reuse of the water in the washing process.

Examples of such a water chain can be a coarse sludge separator, followed by a fine sludge separator, then an oil separator and finally a treatment plant that provides a water of such quality that it can be reused in the process for specific washing tasks such as underbody wash. The invention gives the agar and the user of such a plant both the opportunity to meet the purification and recycling requirements stipulated by the authorities and the opportunity to avoid costly problems in the water plant by feeding and observing the process. Similarly, spleen gains are obtained in optimizing the purification and all water management with the help of the invention can be quality assured.

At the bottom of Figure 4 a practical application of the invention is shown where the different separators are named 11d, 11e, 11f and llg in co-current order, with different combinations of the components of the invention.

The system according to the invention filters a plurality of feed heads 30, a plurality of feed units 20, and also a plurality of central units 40 in a structured structure so that one or more feed heads 30 and / or feed units 20 feed in a separator, and that a central unit 40 serves one or more food counters 20 which are located at the same place or facility, and finally that a data storage unit 43 which serves one or more central units 40 of the facility.

Near the separation tanks 11, usually in a station building or in an office, is a central unit 40 which comprises a radio receiver 41 for receiving the radio signals from the feed units 20 inside the separation tank or tanks 11. The central unit 40 comprises a processor 42 which is arranged to extract and record the data message in each radio signal 24 received by the radio receiver 41 Since each data message contains the unique identity of the sanding food unit 20, it appears from the data message to which separator the information in the data message threat The processor 42 is further arranged to forward the information in the data message. may be a server in which a database 44 is arranged to receive and store the information. The processor 42 may, for example, be arranged to transmit the information to the database 44 over the Internet 45 via a gateway 46.

In the data storage unit 43, which is thirdly accessible via the Internet from ordinary computers or mobile telephones with web browsers, the agars / users of the separators 11 can study hall / al history as current information about degree of filling, levels and temperature in the various separators 11, which information can 21 is used to plan the thinning of the separators 11. The food units 20 with their feed heads 30 inside the various separators 11, the central units 40 and the data storage unit 43 thus form a system for simple and automatic monitoring of the degree of filling, levels and temperature of the separators 11.

According to an earlier description of the central unit, the challenge is that Ora comparisons about the entered values are below or above boundaries, and whether the boundaries are below or exceeded for a longer period of time. If this is the case, alarms can be issued locally at the central unit 40 with sound and light signaling and that relay outputs are closed for issuing alarms to third-party equipment. The processor 42 of the central unit 40 thus creates, with the aid of pre-programmed regulations as well as a multitude of level and time limit values, additional information to the operational information which comes in real time from the various food units 20.

Notifications of operating conditions of varying severity are also sent from the central unit 40, via gateway 46 to the Internet 45 to the data storage unit 43 for storage in the database 44. The data storage unit can, according to the individual customer's wishes, address one or more of the customer's mobile phones 48 with SMS message 47. of importance to inform about.

Connection of one or more feed units 20 to one or more central units 40 as well as live disconnection or switching can advantageously be done according to the method described in the Swedish patent 0601964-0. The system according to the invention can thus be given a hierarchical structure, but the Swedish patent 0601964-0 together with the invention is not limited to it, but an arbitrary structure with elements of parallel transfer and parallel structure can be built.

The invention has been described above on the basis of some specific embodiments. However, it will be appreciated that other embodiments and variants fall within the scope of the invention.

Claims (21)

A method for remote monitoring of levels inside one or more oil separators (11) or grease separators (11) characterized by the steps of a tar monitoring system, which tar monitoring system comprises: 1. one or more arranged feeding units (20), in or at each separator (11) whose levels are to be mains, 2. one or more feed heads (30) connected to each feed unit (20), 3. a central unit (40) located adjacent to the separators (11), which feed unit ( 20) is fixed inside the separator (11) pa. a level which is above the maximum permissible water level (18) of the separator (11) or outside the separator (11) adjacent to it and comprises: 4. an electrical supply circuit (26) for transmitting a pulse and amplifying and converting the received echo signals amplitude to a food value in any electrically feedable quantity, 5. a processor (28), 6. a bat (22), 7. a radio transmitter (23) and 8. a pulse circuit (25), which feed head (30), which is suspended above that whose levels are to be maim, comprises: 9. a pulse sensor (32) and 10. eft pulse receiver (33) which method comprises a supplying step: 11. aft the pulse circuit (25) at predetermined intervals initiates a feed sequence by aft sending an initiation signal to the processor (28), the food sequence comprising the steps of: 12. the processor (28) causes the food circuit (26) to transmit a short pulse to a pulse sensor (32), 13. the processor (28) then inputs echo signals intercepted by a pulse receiver (33) and reinforced by matk the clock (26), 14. aft the processor (28) based on time and strength of the first received signal, which is not an echo, roughly determines the speed of sound, 15. aft the processor (28) analyzes the variation of the received echo signal in time to find maxima and minima, 16. aft maxima with the aid of time since the pulse emitting on edge salt is converted to levels in a physical quantity and minima to turbidity in intermediate liquid, 17. aft these levels are then digitally filtered by the processor (28) pt sh salt that a stable and level entails reflecting the level of the jump layers identified, further comprising a reporting step: 18. the processor (28) initiates a reporting sequence comprising the steps: 19. the processor (28) compiles a data message comprising the at the food sequence the level value obtained and a unique identification number for the food unit (20), 20. aft the processor (28) energizes the radio transmitter (23) and sends the data message to the radio The radio transmitter (23) sends out the data message as a radio signal (24) inside the oil separator (11) or the grease separator (11) so that the radio signal (24) pushes out of the separator (11) and when one or several central units (40), which process leads to the following receiving steps in each central unit (40): the central unit (40) in its radio receiver (41) receives the radio signal (24), possibly projecting from within an oil separator (11) or a grease separator ( 11), 22. or the processor (42) of the central unit (40) decodes the radio signal received by the radio receiver (41) into a data message containing the unique number of the food unit (20) and one or more level values from and connected to the respective food head (30), 23. the central unit on a display (49) shows the level value together with the unique identification number of the food unit (20), 24. the processor (42) compares the information just received with the limit value stored in the memory of the processor (42) with the corresponding t IDsgranser, 25. & rater creates the central unit's processor (42) fly information that reflects different operating conditions inside the separator (11) based on the outcome of the comparison, and how long a value has been outside a spruce value, 26. if said comparative step leads to any abnormal or catastrophic operating condition in the separator (11) is detected, then perform the following steps on the processor (42): 27. bring the display (49) on the central unit indicates the following: 28. that alarm condition lines, 29. severity, 30. which separator or food unit (20) part is the question of, 31. which level or food head (30) feeds a remark value or abnormal or catastrophic level and, 32. part of the level value, 33. aft bring the central unit (40) aft gives a selection of the following signals for aft pakalla attention: light signal, sound signal, data message sent via radio containing information about the alarm, and a relay connection that can be forwarded to third-party equipment ing. Method according to claim 1, characterized in that the remote monitoring system comprises a feed head (30) which is arranged as follows: 1. aft the feed head (30) is belt passive and does not need to be supplied with power, and 2. aft it emits from the pulse transmitter (32) the pulse in the form of a short acoustic pulse is separated and shielded from all with its emitted mechanical shock waves, high-frequency vibrations, sound waves or the like affect the reception of the echo of the emitted pulse in the pulse receiver (33) by arranging the feed head (30) through, 3. aft the substrate in which the pulse sensor (32) and the pulse receiver (33) are fixed is designed as follows: 4. that the material thickness of the substrate is arranged to have a thickness which does not substantially exceed that required for the feed head (20) to obtain the required mechanical strength, and that the substrate is given a pleated shape which leads to: 6. a vaginal propagation wave from the pulse emitter (32) to the pulse receiver (33) which is substantially longer than the shortest distance between them, 7. a fo loss of carriage energy to the surrounding media in the folds, 8. a vaporization of quantifying carriage energy which after folding continues in the direction of the pulse receiver (33), and further 9. that the substrate may be more inclined to the carriage propagation shield (35), and 10. aft the device of said vaginal propagation shield (35) is made so that the location is between the pulse sensor (32) and the pulse receiver (33) in the media surrounding the feed head (30). Method according to claim 1 or 2, characterized in that the reporting sequence with consequent reception also comprises the steps: 1. that the processor (28) when compiling a data message also includes a message number unique to the current data message, information about the battery voltage of the battery (22) and a cyclic checksum, 2. by the processor (42) of the central unit (40) after receiving the radio signal (24) by the radio receiver (41) checks the cyclic checksum and the message number, and 3. if the checksum shows that the message is incorrect then ignores the processor ( 42) the message by inhibiting the following steps which involved a processing of information in the message, 4. aft if reported battery voltage of the food unit (20) is law, the processor (42) creates information about this for issuing alarms, 5. aft about the central unit ( 40) processor (42) for a long time has not received any messages with the correct cyclic checksum from a particular food unit (20 ), the processor (42) creates information about the absence of messages from this particular feeding device (20) for sounding delta alerts. Method according to claims 1-3, characterized in that a part of the information received by the central unit (40) conveyed in the data messages transmitted via radio signal (24), and subsequently in accordance with claim 1 created and added information about operating state, is processed according to the steps: 1. the central unit processor (42) activates and addresses a possible gateway and router (46) for the next step, 2. the central unit processor (42) then forwards some of said information, via an intranet (45) or the Internet (45), to a data storage unit (43), 3. the data storage unit (43) thereby undertakes to store the level value with any added information in a database (44), 4. after which the data storage unit (43) analyzes newly stored information, and that if the information indicates that landmark, ononnal or catastrophic operating conditions have been detected by the central unit (40), the following steps are also performed: 5. the data storage unit (43) removes its database s (44) forward pre-stored regulations that describe which persons with associated telephone numbers are to be notified of different actions depending on different operating conditions, 6. and then the data storage unit (43) sends selected information to the selected persons' mobile phones (48) as SMS- messages (47). Method according to any one of claims 1-4, characterized in that the food sequence in the food unit (20) also comprises the following final steps: 1. that the processor (28) compares the level value obtained in the current food sequence with a level value of the immediately preceding food sequence, 2 only if the difference between said level value exceeds a predetermined level value, the processor (28) continues with the step aft initiating a reporting sequence, moreover 3. aft the processor (28) as a difference value calculates the difference between the level value obtained in the current food sequence and the level value which the processor (28) last included in a data message, 4. aft only if the integral of the difference values of the food sequences since the last reported data message exceeds a predetermined level threshold, the processor (28) continues with the step aft initiating a reporting sequence, in addition 5. aft the processor ( 28) records the time that has elapsed since a reporting session was last initiated, partly 6. aft the processor (28), if said past time exceeds a predetermined time limit value, initiates a timeout report based pit last entered level value, with the file information that the report is just a timeout report meaning aft no change of the level value of importance is to be reported, but that the food unit (20) functions properly and sends a report for the central unit (40) monitoring the transmission channel between the food unit (20) and the central unit (40), and that the above steps in the food unit (20) are supplemented by that each submitted reporting sequence is tracked and that this aggregation of reports issued per unit of time once per unit of time leads to a correction of the level threshold with the following steps: 7. if the number of reports submitted during the last time unit exceeds a setpoint for manufacturing reports per unit unit of time, sit makes the processor (42) an increase of the level threshold by one lines pre-degree calculation of type X * Exceeding number, and in the other side 8. that if the number of reports issued during the most recent unit of time is less than one setpoint for the production of reports reported per unit of time, the processor (42) reduces the level limit by one lines pre-degree calculation of type X * less than the number, and that in addition to the above steps, which it depends on changes in the separators (11) levels (14, 15, 17 or 18) or actions in the food unit (20) that lead to timely initiated reports (24), sit in front of all central units (40) constantly continuously a comparison of last reported messages, with the following steps: 9. that for all food units (20), which must report to the relevant central unit (40), calculate the time that has elapsed then a radio message (24) with a concise checksum was last received and, 26 10. if that time exceeds a time within which a food unit is expected to communicate, then it is marked m the unit (20) as missing, as well as an alarm message for delta is issued as above, and 11. alt the processor (42) compares all last reported level values with in the processor (42) previously stored level limits with associated time limits and, alt if eft niyayarde is outside eft The processor (42) calculates the time (for) the time for which the level value has been outside that lens, and 12. if that time exceeds the time limit associated with the level value, the processor (42) emits an alarm for the level value according to the steps described above for issuing signals for urging attention to remarkable, abnormal or catastrophic operating conditions. 6. A method according to any one of the oceans 1-5, characterized by the step or the processor (28), after the feed sequence in case no reporting sequence is initiated, or otherwise after the reporting sequence has ended with all the radio transmitter (23) sending out the radio signal (24 ), continues the radio transmitter (23), the food circuit (26), any temperature supply (29) and finally itself (28) in a passive sleep state with non-existent power consumption from the battery (22). A system for remote monitoring of levels inside one or more oil separators (11) or grease traps (11) characterized by the system comprises: 1. one or more arranged feed units (20), in or at the separator (11) whose nibs are to be fitted , 2. one or more feed heads (30) connected to each feed unit (20), with cable (21), 3. a central unit (40) located adjacent to the separators (11), which feed unit (20) is fixed inside the separator (20). 11) at a level which is above the maximum permissible water level (18) of the separator (11) or outside the separator (11) in close proximity to it and comprises: 4. one or more feed heads connected to the feed unit (20) by cable (21) (30), above or submerged in the contents of the separator, mainly different liquids, with the structure and composition of the feed head (30) so that all the feed head (30) is belt passive and has a design so that the emitted feed pulse does not affect the reception of echoes from the emitted pulse, and 5. an electrical supply circuit (2 6) for amplifying the seven echo signals into an electrical voltage which is supplyable by the processor (28), 6. a processor (28), 7. a battery (22), 8. a radio transmitter (23) and 9. a pulse circuit ( 25), which pulse circuit (25) is arranged to initiate a level supply at predetermined intervals by sending an initiation signal to the processor (28), 10. which processor (28) is arranged to cause the supply circuit (26) to send out an extremely short pulse. to the pulse emitter (32), and 11. or the processor (28) is programmed to subsequently capture the weak echo signals from the pulse receiver (33), amplified by the feed circuit (26), and in these echo signals identify maxima and minima in time, after which the the emission of the pulse is converted to a level expressed in a physical quantity 27 for unit of length and then this calculated level is filtered in such a way that one or more stable and reliable levels are obtained which reflect levels in some material present under the food head (30), which n processor (28) is programmed to perform a reporting, which the processor (28) compiles into the following contents and transmits with arranged radio transmitter (23): aft the processor (28) is programmed to compile a data message, which comprises part of the level value obtained at the food sequence and a unique identification number for the food unit (20), 12. that the processor (28) is programmed to then energize the radio transmitter (23) and send the data message to the radio transmitter (23), 13. that the radio transmitter (23) is arranged to send out the data message as a radio signal (24), possibly depending on the location of the food unit (20), inside the oil separator (11) or the grease separator (11) in such a way that the radio signal (24) pushes out of the separator (11), where the radio signal (24) reaches one or more central units (40), which central unit (40) is arranged to receive by: 14. that the central unit (40) is arranged to contain a radio receiver (41) intended to receive radio signal a (24), possibly protruding from an oil separator (11) or a grease separator (11), 15. by the processor (42) of the central unit (40) programmed to decode the radio signal received by the radio receiver (41) into a data message containing the food unit (20) ) unique numbers and one or more level values from and connected to the respective food head (30), 16. aft the central unit itr arranged with a display (49) showing the level value together with the unique identification number of the food unit (20), 17. aft the processor (42) is programmed by comparing the information just received with the spruce value stored in the processor's (42) memory with associated time limits, 18. and depending on the outcome of the comparison, and how long the value has been outside a spruce value, its 19th central unit processor (42 ) programmed to create escape information that reflects different operating conditions inside the separator (11), 20. and if said comparison leads to remarks, abnormal or catastrophic if the operating condition of the separator (11) is detected, the processor is programmed to: 21. on an arranged display (49) in the central unit indicate the following: 22. aft alarm condition racier and, 23. severity and, 24. which separator or feed unit (20 ) which carried part of the abnormal condition and, 25. which level or head (30) feeds a remark value or unofficial or catastrophic level and, 26. part of the level value and, 27. activates the following signaling equipment arranged in the central unit (40) to attract attention : light signal, sound signal, 28. data message sent via radio containing information about the alarm, and 29. according to relit where its closing contacts can be connected to third party equipment, and 28 further aft central unit (40) by programming the central unit (40) processor (42) is arranged to continuously Ora a comparison of last irn-retrieved messages, with the following steps: 30. aft for all food units (20), which shall ra report to the current central unit (40), calculate the time that has elapsed since a radio message (24) with the check amount was last received and, even if that time exceeds a time that a food unit is expected to communicate Mom, the food unit (20) is marked as missing, and that the lima message for delta is issued as above, and 31. to compare all most recently reported level values with the level thresholds previously stored in the processor (42) and associated time limits and, 32. that if a level value is outside a level threshold value, the time for how long the level value has been outside that limit, and 33. even if that time exceeds the time limit associated with the level limit value, an alarm is issued for the level value value according to the steps described above for issuing an alert signal about remarkable, abnormal or catastrophic operating condition. A system according to claim 7, characterized by the feeding unit (20) as with. cable (21) has a connected head (30) where these Ire units are arranged as follows: 1. the battery (22) is fully built-in, protected from normal damage and inaccessible, 2. the battery (22) is permanently connected to a set which means that special tools must be used to remove the connections and also loose contact under no circumstances during the life of the food unit (20) may occur, 3. there is no contact or switch that can connect, disconnect or break the power from the built-in battery (22) to the heart rate circuit (25), 4. the cable (21) is permanently attached inside the feed unit (20) and the pit for permanent salt connected to the feed circuit (26), 5. the cable (21) is permanently attached to the feed head (30) and ph for permanent salt by soldering, crimp connection or the like it is connected to the electrically conductive parts of the food head (30), 6. thus the food unit (20) is connected to the cable (21) which in turn is connected to the food head (30) on such a salt att they cannot be taken ice without the great powers of the forest and equipment being taken advantage of, the possibilities of the forest & equipment to continue to function, and that if the flag function were to remain the same, the following conditions will not be exceeded: 7. food stress exposed to the naked naked cable components ph a broken cable (21) is under no conditions sit hog aft an explosive atmosphere can ignite, 8. current that can flow in or out of cable (21) as a result of it being short-circuited can under no conditions be sit hog to heat generation 9. the electrical energy stored by capacitors in the feed unit (20), the cable (21) or the feed head (30) is charged with voltage can under no circumstances be large due to a discharge of the energy in the event of damage to the ph flagon of the three named units can be ignited by an explosive atmosphere, 29 10. the electrical energy stored by alt ind charges in the feed unit (20), the cable (21) or the feed head (30) are charged with flowing current can in case of damage to the flakes of the Ire mentioned units under no circumstances become so large that a discharge of that energy by sparking nth current can be broken If an explosion-prone atmosphere is ignited, the cable for external power supply is neither needed nor can be connected, 11. the electrical connection for ground potential equalization is neither needed nor can be connected and the entire outer surface of the Irish interconnected components is completely challenged by materials of low conductivity, 12. aft the greater part of the outside has saclan nature aft the conductivity is less than 1 GOhm, 13. aft connection to cable or network for delivery of food is neither necessary nor can be done, 14. aft the encapsulation of the food unit (20) is filled of a grout so that no internal atmosphere is present in the food unit, and 15. all this grout encloses the battery life (22), 16. of The interior of the battery is protected by at least barriers of various types such as: 17. stainless steel slide, 18. rubber or elastic polymer, and 19. slag plastic, or with any or other barriers, equivalent or better than the barriers listed above, 20 The encapsulation of the food unit is challenged in such a way that it is hermetically sealed and cannot be divided or opened, unless it has been greatly enlarged, 21. the circuits inside the food unit (20); battery (22), pulse circuit (25), processor (28), radio transmitter (23), temperature circuit (29) if any and the circuit (26) are connected to a hall called intrinsic set meaning all voltages, currents or heat generation can be so that an explosion can be initiated, 22. since no hot surfaces can arise ph any part regardless of malfunction, by intended handling or reasonably incorrect handling, and likewise that the invention can not be caused to become an ignition source, where all the above, in this claim number 8 , enumerated jugs are intended to result in the invention to obtain a summary jug as follows: 23. of the parts of the invention joined together, the feeding unit (20) having a connected feeding head (30) with cable (21) are thus arranged or having the property as a sit called "simple product" which is sit simple in its construction and operation and has no risk of ignition of a surrounding explosive gas all it does not need to undergo a sit referred to as EX classification, and 24. aft delta refers to the definition of its so-called "simple products" which is not covered by Directive 94/9 / EC, where the meaning of "simple products" is described in more detail in the directive, specifically in section 5. 2.1 . , in summary on its salt, 1. because no hot surfaces, sparks, voltages or currents can arise in any part regardless of malfunction, by intended handling or reasonably incorrect handling, and likewise all the invention can not be made to become an ignition source. System according to claim 7 or 8, characterized by the feeding unit (20) having one or more fastening devices (27) consisting of the magnetic fastener for easy fastening to a manhole cover set of cast iron (12) or to another magnetically occurring in or near the separator (11). and that these fastening devices (27) are designed in such a way that they can simultaneously serve as suspension of one or more cables (21) and that one or more feed heads (30) can easily be arranged at the desired height inside the separator and then also easily can be adjusted in height. Method according to claims 1-6, characterized by the steps of a feeding system according to the above claims and with a central unit (40) arranged in that it carries in its memory (42) memory several boundaries for levels with associated time limits, to be executed the task of math., detecting and then paying attention to several mutually independent operating parameters with a single location of a food head (30), comprising: partly the location (30b) ph sit sat: 1. that a food head (30b) is arranged with a floating body to rest the pit surface (17) of accumulated oil or fat, so that the food unit (20b) is arranged to dispense food on the thickness of the oil or fat layer (16) and the level thereon the pH of the bottom sedimented the sludge (13), 2. the equipment also comprises methods or is arranged to report eco-minima as a measure of the turbidity of the water between the spruce layer (14) and sludge (13b) accumulated on the bottom, which method of placement (30b) comprises the following steps: 3. of the processor (42) of the central unit (40) in comparison with the received food values with level and time limits programmed into the processor for all the following conditions: 4. accumulated oil or grease layer (16) thickness, 5. the turbidity of the water between the fat layer (16) and the sludge (13), 6. level of the amount of sludge (13) in the separator, and the location (30c) of its salt: 7. aft after the feed head (30c) is arranged aft hang under the accumulated oil or fat layer (16) but above the pit bottom sedimented sludge (13), sit that the feed unit (20c) emits a level of the sludge (13) and eft mat on the turbidity of the water between the feed head (30c) and the pit sludge (13), which method of placement (30c) comprises the following steps: 8. of the processor (42) of the central unit (40) in comparison with the received food values with level and time limits programmed into the processor for all of the following conditions: 9. the turbidity of the water between the feed head (30c) and the sludge (13), 10. level on the sludge (13) in the separator, partly the location (30a) on its sail 11. aft of the feed head (30a) is arranged aft laterally hanging inside the separator (11) above a place where the water level represents the so-called static level (15) whose level during normal operation in the separation process is determined by the drain height of the outlet (19), and 12. the feed head (30a) is suspended at such a height that it is higher than the level at which the alarm for dusting is to be emitted (18), which procedure for the placement (30a) comprises the following steps: 31 13. depending on the position according to (30a) above of the food head Ors after the first manual step aft calibrate the made height placement of the food head (30a) in height so that all knowledge is obtained about which level food value in the separator (11) corresponds to the static level (15) at correct function in the separator, where the part of the level value can have an arbitrary millimeter value, and all the part of the level value is still called the zero level to bring clarity in the description of the following steps: 14. Then, on the processor (42), repeat the step all comparing the last reported level with the calibrated static level (15) at normal operating conditions, and if the level is below zero, then perform the steps (42): 15. Even when the last received level below zero level is processed by the central unit (40), the part of the central unit's (40) processor (42) is compared with level limits programmed into the processor with associated time limits which in practice constitute a limit for leakage speed. avges, 16. and if one or more boundaries are exceeded with a descending level downwards, an alert signal or an alarm is issued by the processor (42) to indicate "lackage", and otherwise, if the level is above zero, the steps (42) : 17. when the most recently received level value above the zero level is processed by the central unit (40), the part of the central unit (40)'s processor (42) is compared with one or more programmed grounds for dusting (18) to decide whether an alert signal or an alarm should be issued; 18. and if one or more boundaries with associated time limits are exceeded upwards, or an alert signal or after an alarm is issued by the processor (42) to indicate "impending dusting" or "dusting", and finally some final steps, galling all the placements ( 30b, 30c, and 30a) where the following steps are performed only if any or some boundaries comparable in steps according to the above in this requirement have been exceeded, where the following steps include: 19. or the processor (42) complements the food value information with information from the level limits as to whether the operating condition at the time of comparison has been found to be remarkably black, abnormal or catastrophic; 20. aft the processor (42) causes the central unit (40) to emit local attention signals with light, sound, radio and reld signals, where the choice of signaling is controlled by information belonging to the level limit exceeded, 21. aft if attention signals according to the previous step have been given, si. the processor (42) also performs the step of arranging the same information sent to the parent data storage unit (43) leading to all the data storage unit stores the information in its database (44) and thereafter Or any forwarding by SMS (47) to one or more mobile telephones (48) , where this forwarding is controlled by data stored in the database (44) ph. 32