EP3941641A1 - Method for processing explosive products in a separating machine, and separating machine - Google Patents

Abstract

The invention relates to a method for processing explosive products in a separating machine (10) which comprises a rotary apparatus (30) located in a drum (20), wherein the drum (20) is located in a machine housing (40). According to the invention, a cooling liquid is applied, in particular sprayed, onto an outer surface (21) of the drum (20), at least onto portions thereof and/or intermittently, during processing of the products, and the temperature in the machine housing (40) is monitored during processing.

Description

Process for processing explosive products in a cutting machine and cutting machine

DESCRIPTION

The invention relates to a method for processing explosive products in a cutting machine, which comprises a rotating device located in a drum, the drum being located in a machine housing, according to claim 1. Furthermore, the invention relates to a cutting machine for performing a method according to the invention for processing explosive products Products according to claim 9.

It is known that explosive products with a flash point close to the processing temperature cannot be easily processed in a separating machine, in particular in a solid bowl centrifuge or in a separator, especially if the processing temperature is only 15 Kelvin lower than the specific flash point of the respective manufacturing product. According to the Technical Rules for Operational Safety (TRBS) -2152, a threshold with regard to the processing temperature for pure, non-halogenated liquids is defined as 5 K below the flash point of the liquid. A threshold with regard to the processing temperature for solvent mixtures without halogenated components is defined as 15 K below the flash point.

Due to the temperatures that arise or prevail during processing and / or when the machine is at a standstill, the flash point inside the separating machine, in particular inside the solid bowl centrifuge or inside the separator, can be exceeded, so that a dangerous, potentially explosive atmosphere can form.

In order to be able to process such products, explosion protection within cutting machines, in particular within solid bowl screw centrifuges or separators, has so far been ensured by inerting processes. This avoids the formation of an explosive atmosphere inside the cutting machine. In order to be able to carry out such an inerting process, an inerting unit is required which monitors and controls the supply of inert gas to the separating machine and the maintenance of the necessary pressures within the separating machine. In this way, the inert atmosphere inside the cutting machine can be guaranteed.

Such monitoring places certain demands on the measurement technology.

Furthermore, the system periphery of an inert centrifuge must be designed in such a way that the required pressures are maintained and an undesired escape of inert gas is avoided.

In summary, the operation of an inert cutting machine is costly and technically intensive. In addition, inert gas must be made available, which in turn further dangers such. B. the asphyxiation of people, and because of which precautions must be taken to protect personnel from this inert gas.

From the above, it is therefore the object of the present invention to provide a further developed method for processing explosive products in a separating machine, in particular in a solid bowl screw centrifuge or in a separator, which is not as complex as previously known inerting methods. Overall, a method is to be made available which can be carried out easily and which can also be retrofitted in existing cutting machines, in particular solid bowl screw centrifuges or systems or separators.

A further object of the invention is to specify a cutting machine, in particular a solid bowl screw centrifuge or a separator, which is used to carry out a method according to the invention for processing explosive products.

The object of the invention is achieved by a method for processing explosive products in a cutting machine, according to the teaching according to claim 1. Furthermore, the object of the invention is achieved by a cutting machine for performing a method according to the invention, according to the teaching according to claim 9. The subclaims represent at least useful configurations and developments of the method according to the invention or the cutting machine according to the invention.

The method according to the invention for processing explosive products in a cutting machine provides that the cutting machine first comprises a rotating device located in a drum, the drum itself being located in a machine housing. According to the invention, an outer surface of the drum is acted upon, in particular sprayed, directly or indirectly, at least in sections and / or at times, with cooling liquid during the processing of the products. Furthermore, the temperature in the machine housing is monitored during processing.

The method according to the invention for processing explosive products in a full-bowl screw centrifuge provides that the full-bowl screw centrifuge initially comprises a screw located in a drum, the drum itself being located in a machine housing. According to the invention, an outer surface of the drum is acted upon, in particular sprayed, directly or indirectly, at least in sections and / or at times, with cooling liquid during the processing of the products. Furthermore, the temperature in the machine housing is monitored during processing.

The method according to the invention for processing explosive products in a separator provides that the separator initially comprises a rotatable disk package located in a drum, the drum itself being located in a machine housing. According to the invention, an outer surface of the drum is acted upon, in particular sprayed, directly or indirectly, at least in sections and / or at times, with cooling liquid during the processing of the products. Furthermore, the temperature in the machine housing is monitored during processing.

It can be seen that, according to the invention, a method for processing explosive products in a separating machine is made available which can be used equally for solid bowl screw centrifuges and separators. The outer surface of the drum of a solid bowl screw centrifuge is to be understood as the surface of the drum that is not designed on the inside, ie not pointing in the direction of the screw. In other words, the outer surface of the drum forms the rotor surface. In solid bowl screw centrifuges, the component group formed from the screw and the bowl is called the rotor.

The outer surface of the drum of a separator is to be understood as the surface of the drum that is not on the inside, i.e. H. not pointing in the direction of the plate assembly is formed.

The outer surface of the drum is acted upon, in particular sprayed, with cooling liquid at least in sections during the processing of the products.

Furthermore, it is possible that both the surface of the drum and the inner surfaces of the machine housing are acted upon, in particular sprayed, with cooling liquid at least in sections and / or at times during the processing of the products.

According to the invention, primarily, in particular exclusively, the outer surface of the drum of the cutting machine is acted upon, in particular sprayed, with cooling liquid. Direct cooling of the product to be processed and / or the rotating device, in particular the screw or the plate assembly, is usually not, preferably not, necessary.

In particular, the outer surface of the drum and / or the inner surfaces of the machine housing of a solid bowl screw centrifuge is / are at least partially exposed to cooling liquid, in particular sprayed, which surrounds the upper half of the screw with an imaginary division of the screw along the longitudinal axis.

In particular, the outer surface of the drum and / or the inner surfaces of the machine housing of a separator is / are acted upon, in particular sprayed, with cooling liquid, at least in sections, which in a imaginary division of the drum housing along a horizontal axis relates to the upper portion of the drum housing.

In a further embodiment of the invention, it is possible that the entire outer surface of the drum and / or the inner surface of the machine housing is / are acted upon, in particular sprayed, with cooling liquid over the entire inner circumference.

Due to the application, in particular spraying, of the outer surface of the drum with a cooling liquid and the simultaneous temperature monitoring in the machine housing during the processing of the product, a method for processing explosive products is made available that can be carried out without an inerting process. This applies in particular to the processing of products whose processing temperature is relatively just below the flash point.

In particular, it is possible that the processing temperature is only 5 Kelvin lower than the flash point.

It has surprisingly been found that the formation of an explosive atmosphere inside the centrifuge can be prevented by directly cooling the components that come into contact with the product during processing of the explosive product.

Due to the cooling of the outer surface of the drum, the formation of an explosive atmosphere is avoided by preventing the flash point from being exceeded.

It has again been found, surprisingly, that with regard to the heating of the product to be processed inside the drum, the products remaining in the drum are decisive for the additional heating of the material. The majority of the product flow that is passed through the separating machine, in particular through the solid bowl screw centrifuge or the separator, absorbs little temperature due to the relatively short dwell time if there is sufficient flow. Therefore, the cooling of the outer surface of the drum and / or the inner surfaces of the Machine housing to a sufficiently low temperature of the product located inside the cutting machine.

The cooling liquid preferably comes into contact with the product to be processed or the processed product at most to a small extent. The cooling liquid can be selected according to the product to be processed. In a preferred embodiment of the invention, the cooling liquid is cooling water.

The outer surface of the drum is preferably sprayed if the cutting machine has a spraying system with several spray nozzles as a cooling device.

The application of cooling liquid can, for example, take place with such cooling devices that have cooling tubes. Such cooling tubes can be routed around the outer surface of the drum.

In a further embodiment of the invention, the cooling device can be designed in such a way that an intermediate space is formed in the cutting machine. Such a gap is preferably formed between the outer surface of the drum and a housing section spaced from the outer surface of the drum. Cooling liquid can circulate in this space. In other words, a cooling liquid can flow in a double-walled drum housing. It is therefore possible that the outer surface of the drum is acted upon directly or indirectly with cooling liquid.

In a further embodiment of the invention it is provided that the maximum temperature of the cooling liquid is regulated. In particular, the temperature of the cooling liquid is regulated to a maximum temperature that is just below the permissible processing temperature of the product. The cooling liquid is particularly preferably regulated to a maximum temperature of 35 ° C, in particular 30 ° C, in particular 25 ° C.

This usually means that the coolant does not have to be cooled to a large extent at normal central European ambient temperatures. Only At higher ambient temperatures, a slight cooling of the coolant is necessary.

Due to the cooling of the cooling liquid, the influence of increased ambient temperatures on the increase in temperature within the cutting machine is reduced.

In a further embodiment of the invention it is possible for the maximum temperature of the cooling liquid in a tank to be regulated. It is possible for the cutting machine or the cooling device associated with the cutting machine to have a tank, in particular a storage tank, the cooling liquid being stored or temporarily stored in this tank.

Regulation of the maximum temperature of the cooling liquid in a tank enables particularly precise cooling of the outer surface of the drum. The temperature of the cooling liquid in the tank is preferably regulated on the basis of temperature monitoring of the cooling liquid in the tank. Due to such a temperature monitoring and a corresponding regulation of the maximum temperature of the cooling liquid in a tank, a sufficient temperature difference can be made available.

When monitoring the cooling liquid in a tank, it is also taken into account, among other things, that the cooling liquid is heated accordingly due to the circulation of a cooling liquid in a cooling device.

A cooling liquid inlet and / or spray nozzles is / are activated at time intervals and cooling liquid, preferably via spray nozzles, is distributed within the machine housing, and preferably in sections on the inside of the machine housing.

When a first temperature threshold value is detected in the machine housing and / or in a liquid phase sequence, the coolant supply and / or spray nozzles are activated. It is therefore possible that at least some sections of the drum are acted upon, in particular sprayed, while the products are being processed, but not during the entire processing time. The application, in particular the spraying, of the drum and thus a cooling process can, for example, only be started after a first temperature threshold value has been recorded. This enables cooling liquid to be saved, since this is only used if this is necessary due to the detected temperatures.

It is also possible that such a specification of a first temperature threshold value takes place and / or such a machine setting is carried out that the application, in particular the spraying, of the drum with cooling liquid takes place during the complete processing time. This is particularly advantageous when the cutting machine is used at high ambient temperatures or when a particularly explosive product is to be processed.

Furthermore, it is possible that the temperature of a centrate generated by the separating machine, in particular the solid bowl screw centrifuge or the separator, i.e. H. the liquid phase separated from the product is monitored. Such monitoring of the centrate detects temperature increases of the product early on during processing. If a permissible centrate temperature is exceeded, it is possible to stop the supply of products to be processed in the separating machine, in particular in the solid bowl screw centrifuge or the separator. In the case of a separator, this can include both the heavy liquid phase and the light liquid phase.

When a second temperature threshold value, which is greater than the first temperature threshold value, is detected in the machine housing and / or in the liquid phase drain, it is possible to stop a supply of the product to be processed in the separating machine, in particular in the solid-bowl screw centrifuge or in the separator, and into the Drum or in the separating chamber of the cutting machine liquid, in particular cooled liquid, to be pumped.

The supply of liquid, in particular of cooling liquid, into the drum of a solid-bowl screw centrifuge or a separator is preferably carried out via the inlet pipe through which the product to be processed is normally the Drum is fed. The supply of liquid is preferably carried out until the temperature value recorded in the machine housing has fallen below the second temperature threshold value again.

Due to the stop of the supply of the product to be processed and the supply of liquid, the formation of an explosive atmosphere is prevented. This is due to the fact that no more potentially explosive product to be processed flows into the drum and, in addition, the flash point of the product still in the cutting machine is diluted due to the dilution with liquid, in particular cooling liquid.

When a third temperature threshold value is detected, which is greater or higher than the second temperature threshold value, the separating machine, in particular the solid-bowl screw centrifuge or the separator, is preferably switched off.

In other words, the solid bowl screw centrifuge or the separator is shut down in a safety-oriented manner when the third temperature threshold value is reached. A restart of the solid bowl centrifuge or the separator should preferably only be possible after the temperature (s) recorded in the machine housing and / or in the liquid phase flow have fallen below the second temperature threshold value.

Furthermore, it is possible that when the second temperature threshold value is detected, the cooling liquid itself is cooled in such a way that the maximum temperature of the cooling liquid has a lower value than was specified before the first temperature threshold value was detected. In other words, the cooling liquid temperature can be regulated as a function of the temperature (s) detected in the machine housing. In particular when a second temperature threshold value and / or a third temperature threshold value is detected, a corresponding regulation of the maximum temperature of the cooling liquid can bring about a corresponding cooling of the explosive product located in the drum.

Furthermore, it is possible that the acquisition of a second temperature threshold value takes place in combination with the acquisition of a temperature value for the cooling liquid located in a tank.

The regulation of the coolant temperature, in particular the regulation of the The temperature of the cooling liquid that is in a tank can take place on the basis of the detection of the temperature in the machine housing and / or in the liquid phase flow as well as by additional detection of the cooling liquid temperature in the tank.

It is also possible for the throughput of the product to be processed in the cutting machine to take place as a function of recorded temperature values. It is possible that the product feed is stopped if the permissible centrate temperature is exceeded in order to prevent further heating of the product in the drum. It is also possible for the product temperature itself and / or the flow rate to be regulated as a function of the detected centrate temperature. If the flow rate is too low, the heat input into the product is higher during processing and can lead to the second or third temperature threshold being exceeded.

In a preferred embodiment of the invention, the cooling liquid is collected in the machine housing after the application, in particular after the spraying, and is then used again for the application, in particular the spraying. A cooling liquid circuit can be formed which, after the application, in particular the spraying, of the outer surface of the drum, provides for a collection of the drained cooling liquid and a subsequent application, in particular spraying. It is possible to check the coolant for contamination before using it again, so that the coolant can optionally be cleaned.

It should be noted that the proposed method according to the invention is extremely simple to implement and handle. No inert gases have to be used. The dangers associated with the use of inert gases are thus eliminated.

It has been shown that the method according to the invention can be used particularly well in the processing of alcohol products or oil sludge media. The alcohol products can, among other things, be potable alcohol products. Another aspect of the invention relates to a cutting machine for carrying out the method according to the invention. The cutting machine has a rotating device located in a drum, the drum being located in a machine housing.

According to the invention, a cooling device, in particular a spraying system with several spray nozzles, is formed in the machine housing, the cooling device, in particular at least one of the spray nozzles, being directed at the outer surface of the drum or arranged in such a way that the outer surface of the drum is directly or indirectly exposed to a cooling liquid can be acted upon. In addition, at least one temperature monitoring unit is formed in the machine housing.

In particular, a further aspect of the invention relates to a solid bowl screw centrifuge for carrying out the method according to the invention. The solid bowl screw centrifuge has a screw located in a drum, the drum being located in a machine housing. According to the invention, a cooling device, in particular a spraying system with several spray nozzles, is formed in the machine housing, the cooling device, in particular at least one of the spray nozzles, being directed at the outer surface of the drum or arranged in such a way that the outer surface of the drum is directly or indirectly exposed to a cooling liquid can be acted upon. In addition, at least one temperature monitoring unit is formed in the machine housing.

In particular, another aspect of the invention relates to a separator for carrying out the method according to the invention. The separator has a rotatable disk package located in a drum, the drum being located in a machine housing. According to the invention, a cooling device, in particular a spraying system with several spray nozzles, is formed in the machine housing, the cooling device, in particular at least one of the spray nozzles, being directed at the outer surface of the drum or arranged in such a way that the outer surface of the drum is directly or indirectly exposed to a cooling liquid can be acted upon. In addition, at least one temperature monitoring unit is formed in the machine housing. A full-bowl screw centrifuge according to the invention can be both a 2-phase full-bowl screw centrifuge and a 3-phase full-bowl screw centrifuge.

A separator according to the invention can be both a 2-phase separator and a 3-phase separator.

The cooling device can, for example, be such a device that has cooling tubes. Such cooling tubes can be arranged on the surface of the drum. In such a case, a cooling liquid is indirectly applied to the outer surface of the drum.

In a further embodiment of the invention, the cooling device is designed as an intermediate space formed in the machine housing, wherein a cooling liquid can be circulated in the intermediate space and the intermediate space is formed by at least one outer surface of the drum and a further housing section spaced from the outer surface. In such an embodiment of the invention, a cooling liquid can be applied directly to the outer surface of the drum. A type of double-walled housing is formed into which the cooling medium can be introduced continuously. In other words, it is possible for the drum to have a double-walled drum housing, a cooling liquid being able to flow in the intermediate space formed due to the double-walled structure. The advantage of such an embodiment of the invention lies in the large-area exposure of the outer surface of the drum with cooling liquid. Furthermore, the cooling device does not have to be arranged in a targeted manner, since a cooling liquid can be applied to almost the entire surface of the drum.

The spray nozzles are preferably formed in an upper side or in the area of an upper side of the machine housing or in the area of a cover surface of the machine housing.

Due to the arrangement of the spray nozzles, it is also possible that the inside of the machine housing can be sprayed with cooling liquid, at least in sections. Such an arrangement of the spray nozzles enables in particular the outer surface of the drum of a solid bowl screw centrifuge to be sprayed with cooling liquid which is located in the upper part with an imaginary division of the screw along the longitudinal axis of the screw.

When forming a separator according to the invention, at least one of the spray nozzles can be arranged in the machine housing in such a way that with an imaginary division of the drum housing along a horizontal axis, the upper section of the drum housing is sprayed with a cooling liquid. The horizontal axis is preferably located at the level of the outlet openings, in particular the outlet nozzles, of the separator.

To increase the degree of cooling, it is also possible for the spray nozzles to be arranged in the entire machine housing, so that the drum can also be sprayed with cooling liquid from the side and / or from below. In other words, the spray nozzles can be arranged in such a way that full cooling of the outer surface of the drum is made possible.

In one embodiment of a separator according to the invention, at least one spray nozzle can also be formed in the area of a fastening web, along which the solids discharge usually flows.

For example, such a fastening web is double-walled, so that at least one spray nozzle can be arranged in the double-walled construction in particular. Alternatively or additionally, it is possible for at least one spray nozzle to be arranged in the machine housing in such a way that it is directed from the outside onto the area of the, in particular double-walled, fastening web. Since increased temperatures in connection with the discharge of solids are to be assumed, particularly in the area of the fastening web, the arrangement of at least one spray nozzle in this area is particularly advantageous.

In the simplest case, the temperature monitoring unit can be formed from a temperature sensor. It is also possible for a temperature monitoring unit to additionally have a computing unit. In a In a further embodiment of the invention, it is possible for several sensors to be connected to a single processing unit.

It is possible for a temperature monitoring unit and / or a device for cooling the cooling liquid to be formed in a tank for storing the cooling liquid. The temperature monitoring unit of the tank for storing the cooling liquid can be connected to the temperature monitoring unit of the machine housing. Furthermore, it is possible that the temperature monitoring unit of the tank for storing the cooling liquid is a unit belonging to the temperature monitoring unit of the machine housing.

With the aid of a device for cooling the coolant, it is possible to cool the coolant in the tank. Such cooling can take place, for example, when the outside temperature or the ambient temperature rises and when different threshold values are reached in the machine housing.

A further temperature monitoring unit can be formed in a liquid phase discharge or in the area of the centrate discharge of the separating machine, in particular the solid bowl screw centrifuge or the separator. With the help of this temperature monitoring unit, the centrate temperature or the temperature of the liquid phase separated by the separating machine, in particular the solid bowl screw centrifuge or the separator, can be determined and / or monitored.

If the separating machine according to the invention is a separator, in particular a 3-phase separator, a temperature monitoring unit can each be formed in the area of the slight liquid phase outlet and in the area of the heavy liquid phase outlet.

Furthermore, in connection with a separator according to the invention, it is possible for the temperature to be recorded in a solid cyclone. A solid separated or generated by the separator is usually transported into a solid cyclone. It is also possible for a collection and return device for used cooling liquid to be formed in the machine housing. It is possible that a cleaning unit is formed in this collection and return device. The collected coolant can thus be cleaned again before it is used again. A detection unit for determining the degree of contamination of the cooling liquid is also possible.

Due to the device according to the invention and the method according to the invention, such an explosive product can be processed in a separating machine, in particular in a solid bowl screw centrifuge or in a separator, for example, which has a flash point of> 44 ° C. It is also possible to process explosive products that have an even lower flash point by adapting the process and / or the cutting machine accordingly.

In particular, materials of explosion group IIA or IIB can be processed. Furthermore, temperature classes TI - T4 can be processed.

It is possible that when processing an explosive product with changes to the state of the art, i. H. increased processing temperatures can be worked.

In the case of mixtures with a flammable component, the processing temperature can be: Flash point of the mixture - 9 Kelvin.

In other words, the processing temperature can have a value that is at least 9 Kelvin lower than the flash point of the product to be processed.

In the case of mixtures or products that have several flammable components, the processing temperature can be: Flash point minus 19 Kelvin. In other words, the processing temperature can have a value that is at least 19 Kelvin lower than the flash point of the product to be processed. In particular, it is possible to use the separating machine according to the invention for processing alcohol products or for processing oil sludge media. The alcohol products can, among other things, be potable alcohol products.

The full bowl screw centrifuge according to the invention can be operated in Zone 2 IIB T4.

The method according to the invention and the associated cutting machine according to the invention are described in more detail below with the aid of schematic representations.

Here show:

1 shows a solid bowl screw centrifuge according to the invention; and

2 shows a separator according to the invention.

In the following, the same reference numerals are used for identical and identically acting components.

The solid bowl screw centrifuge 10 shown in FIG. 1 comprises a screw 30 located in a drum 20. The component group which includes both the drum 20 and the screw 30 is generally referred to as a rotor. The rotor is characterized in that both the drum 20 and the worm 30 rotate.

The drum 30 or the rotor is located in a machine housing 40. In the machine housing 40, in particular in the area of the cover side 41 of the machine housing 40, there is a spraying system 50. The spraying system 50 has several spray nozzles 51. The spray nozzles 51 are directed at the drum 20 in such a way that the outer surface 21 can be sprayed at least in sections with cooling liquid, in particular with cooling water.

The spray nozzles 51 are preferably aligned in such a way that, in particular, the upper half of the outer surface 21 of the drum 20 is sprayed is made possible. The upper half is to be understood as the half of the drum 20 or the outer surface 21 which is formed in an imaginary section through the longitudinal axis L of the screw. Since the drum 20 rotates during the processing of a product, the complete or almost the complete outer surface of the drum 20 is thus cooled during the processing.

The spray nozzles 51 are distributed within the machine housing 40 in such a way that the cooling liquid also strikes the inner sides 43 of the machine housing 40 in sections.

In addition, it is possible that such spray nozzles are used, which are also arranged in the bottom side 42 of the machine housing 40, so that a simultaneous full circumferential spraying of the outer surface 21 of the drum 20 is made possible during the processing of the product. If spray nozzles are to be formed in the area of the bottom side 42 of the machine housing 40, they may have to be operated at a higher pressure so that the outer surface 21 can be cooled.

It can also be seen that the solid bowl screw centrifuge 10 is designed with a plurality of temperature monitoring units 60-63. The temperature monitoring units 60 - 62 determine the temperatures in the machine housing 40. The temperature monitoring unit 63 detects or monitors the temperature of the centrate 70 generated by the solid bowl screw centrifuge 10.

In order to process explosive products, these products are transported into the drum interior 18 via the inlet pipe 15. In the interior of the drum 18, which can also be referred to as a separation space, the explosive product is separated into a solid and a centrate 70.

The solids are correspondingly transported away via a solids outlet 71 (only shown schematically). During the processing of the explosive product, the outer surface 21 of the drum 20 is sprayed with cooling liquid by means of the spray system 50. At the same time, the temperature in the machine housing 40 is recorded or monitored. In the present example, this takes place via the temperature monitoring units 60, 61 and 62.

It is possible to regulate the temperature of the cooling liquid used in the spraying system 50. In particular, there is a regulation to a maximum temperature of 25 ° C.

In addition, the temperature of the centrate 70 is monitored by means of the temperature monitoring unit 63.

When a first temperature threshold value is detected in the machine housing 40 and / or in the liquid phase drain 72 in which the centrate 70 is transported, a supply of the product to be processed in the solid bowl screw centrifuge 10 is preferably stopped and cooling liquid, in particular water, is supplied or pumped into the drum 20 . The water is transported into the drum interior 18 via the inlet pipe 15. This leads to a temporary cooling and dilution of the product in the interior of the drum 18. A dilution of the product causes an increase in the flash point of the product.

When a second temperature threshold value is detected, which is higher than the first temperature threshold value, the solid bowl screw centrifuge 10 is preferably switched off.

Alternatively or in addition, when a / the second temperature threshold value is detected, the cooling liquid itself is additionally or alternatively cooled in such a way that the maximum temperature of the cooling liquid has a lower value than was specified before the first temperature threshold value was detected. The cooling or temperature regulation of the cooling liquid takes place preferably in the cooling liquid inlet 52 of the spraying system 50.

After the spraying, the cooling liquid can be collected in the machine housing 40 by means of a collection and return device 80 and then transported to the cooling liquid inlet 52. This enables a Resource-saving use of cooling liquid in a solid bowl screw centrifuge 10.

In Fig. 2, a further embodiment of a cutting machine according to the invention, namely an embodiment of a separator 10 'is shown. The illustrated separator 10 is a 3-phase separator. The method according to the invention and the device according to the invention can, however, also be applied to 2-phase separators.

A rotatable disk pack 30 ′ is arranged in a drum 20. The drum 20 is located together with the disk package 30 ′ in the machine housing 40. A spraying system 50 is at least partially located in the machine housing 40. The spraying system 50 has several spray nozzles 51.

A spray nozzle 51 is arranged in such a way that, in particular, an upper section of the outer surface 21 of the drum 20 can be sprayed. The upper section is to be understood as the section of the drum 20 or the outer surface 21 which is formed in an imaginary section through the horizontal axis H of the drum 20. The horizontal axis H runs in particular at the level of the outlet openings 90, which are designed in particular as outlet nozzles.

Since the drum 20 rotates during the processing of a product, the upper portion of the outer surface of the drum 20 is thus completely or almost completely cooled during the processing.

In addition, according to the embodiment of FIG. 2, such a spray nozzle 5 is formed, which is directed towards the area of the web 91. In particular, the separated solid is transported along the web 91. In the area of the web, therefore, increased temperatures in particular are to be expected.

Another exemplary spray nozzle 51 ″ is arranged in the area of the lower section or the bottom side 41 of the machine housing 40. Accordingly, the spray nozzle 51 ″ is oriented in such a way that, in particular, a lower section of the drum 20 can be exposed to cooling liquid. The separated solids preferably pass into a solids cyclone 92.

A spray nozzle 51 can also be formed in this solid cyclone 92.

This also prevents an ignition / explosion of an already separated solid during temporary storage in the solid cyclone 92.

It can be seen that the separator 10 ′ is designed with a plurality of temperature monitoring units 60 and 64-67. The temperature monitoring unit 60 determines the temperature in the machine housing 40, in particular in the area above the horizontal axis H.

Furthermore, a temperature monitoring unit 64 is formed in the area of the bottom side 42 of the machine housing 40.

Furthermore, a temperature monitoring unit 66 is formed in the area of the heavy liquid phase drain 94 and a temperature monitoring unit 65 in the area of the light liquid phase drain 93.

In other words, the temperature monitoring unit 66 detects the temperature of the heavy liquid phase generated by the separator 10 '. The temperature monitoring unit 65 detects or monitors the temperature of the light liquid phase generated by the separator 10 '.

In order to process explosive products, these products are transported into the drum interior 18 via the stationary inlet pipe 15. In the interior of the drum 18, which can also be referred to as a separation space, the explosive product is separated into a solid, a light liquid phase and a heavy liquid phase.

During the processing of the explosive product, the outer surface 21 of the drum 20 is at least temporarily sprayed with a cooling liquid by means of the spray system 50. At the same time, the temperature in the machine housing 40 is recorded or monitored.

It is possible to regulate the temperature of the cooling liquid used in the spraying system 50. In particular, regulation takes place to a maximum of 25 ° C., for example. In addition, the temperature of the solid in the Area of the bottom side 42 of the machine housing 40 is monitored. Temperature monitoring by means of the temperature monitoring unit 67 in the area of the solid cyclone 92 is also advantageous.

The detection of temperature threshold values, in particular a first, a second and a third temperature threshold value, and the related regulation of the operation of the separator 10 ′ essentially corresponds to the method in connection with the solid bowl screw centrifuge 10. It is therefore also possible that via the inlet pipe 15 during detection a second temperature threshold value is transported into the drum interior 18, a cooling liquid. This leads to a temporary cooling and dilution of the product inside the drum. A dilution of the product causes an increase in the flash point of the product located in the drum interior 18.

When a third temperature threshold value is detected, which is higher than the second temperature threshold value, the separator 10 ′ is preferably switched off.

Also in connection with the separator 10 ′, after the spraying in the machine housing 40, the cooling liquid can be collected by means of a collection and return device (not shown) and then transported to the cooling liquid inlet 52. As a result, an environmentally friendly use of cooling liquid in a separator 10 'can be made possible.

Otherwise, the same explanations apply as in connection with the solid bowl screw centrifuge 10.

List of reference symbols

10 solid bowl screw centrifuge

10 'separator

15 inlet pipe

18 Drum interior / separation area

20 drum

21 Outer surface 30 snail

30 'plate package

40 machine housing

41 cover side

42 bottom side

43 inside

50 spray system

51, 51 ', 51 "spray nozzle

52 Coolant supply

60 - 63 temperature monitoring unit

64 - 67 temperature monitoring unit

70 centrate

71 Solids outlet

72 Liquid phase flow

80 Collection and return device

90 outlet opening

91 bridge

92 solid cyclone

93 slight liquid phase flow

94 heavy liquid phase flow

Fl horizontal axis

L longitudinal axis

Claims

EXPECTATIONS 1. A method for processing explosive products in a separating machine, in particular in a solid bowl screw centrifuge (10) or a separator (10 '), which has a rotating device located in a drum (20), in particular a screw (30) or a plate package (30') , wherein the drum (20) is located in a machine housing (40), dad u rch g eken nzeich net that an outer surface (21) of the drum (20) during the processing of the products at least partially and / or temporarily with Cooling liquid is applied directly or indirectly, in particular sprayed, and the temperature in the machine housing (40) is monitored during processing. 2. The method according to claim 1, dad u rch g eken nzeich net that the maximum temperature of the cooling liquid, in particular the maximum temperature of the cooling liquid in a tank, is regulated, in particular to a maximum temperature of 35 ° C, in particular 30 ° C , especially 25 ° C. 3. The method according to claim 1 or 2, dad u rch geken nzeich net that a cooling liquid inlet (52) and / or spray nozzles (51) is / are activated at time intervals and cooling liquid, preferably via spray nozzles (51), within the machine housing ( 40), and preferably in sections on the inner sides (43) of the machine housing. 4. The method according to claim 3, dad u rch g eken nzeich net that when a first temperature threshold value is detected in the machine housing (40) and / or in a liquid phase drain (72) the cooling liquid inlet (52) and / or spray nozzles (51) is activated / become. 5. The method according to claim 4, dad u rch g eken nzeich net that upon detection of a second temperature threshold value, which is greater than the first temperature threshold value, in the machine housing (40) and / or in the liquid phase drain (72) a supply of the in the cutting machine, in particular the solid bowl screw centrifuge (10) or the separator (10 '), the product to be processed is stopped and liquid is fed into the drum (20). 6. The method according to claim 5, dad u rch g eken nzeich net that when a third temperature threshold value is detected, which is greater than the second temperature threshold value, the separating machine, in particular the solid bowl screw centrifuge (10) or the separator (10 ') is switched off. 7. The method according to any one of the preceding claims, in particular according to one of claims 3 to 6, dad u rch g eken nzeich net that when a / the second temperature threshold value is detected, the cooling liquid, in particular the cooling liquid in a tank, is itself cooled in this way that the maximum temperature of the cooling liquid has a lower value than was defined and / or regulated before the first temperature threshold value was detected. 8. The method according to any one of the preceding claims, dad u rch g eken nzeich net that the cooling liquid is collected in the machine housing (40) after the application, in particular after the spraying, and is then used again for cooling, in particular for spraying. 9. Separating machine, in particular full-bowl screw centrifuge (10) or separator (10 '), for carrying out a method according to one of claims 1 to 8 for processing explosive products, wherein the separating machine, in particular the full-bowl screw centrifuge (10) or the separator (10'), a rotating device located in a drum (20), in particular a worm (30) or a set of plates (30 '), wherein the drum (20) is located in a machine housing (40), which means that a cooling device, in particular a spray system (50) with several spray nozzles (51), is located in the machine housing (40) ), is formed, wherein the cooling device, in particular at least one of the spray nozzles (51), is directed towards the outer surface (21) of the drum (20) or is arranged such that the outer surface (21) of the drum (20) with a cooling liquid can be applied, and furthermore at least one temperature monitoring unit (60) is formed in the machine housing (40). 10. Separating machine according to claim 9, dad u rch g eken nzeich net that the cooling device is designed as an intermediate space formed in the machine housing (40), wherein a cooling liquid can be circulated in the intermediate space and the intermediate space through at least one outer surface (21) of the Drum (20) and a further, from the outer surface (21) spaced housing section is formed. 11. Cutting machine according to claim 9 or 10, dad u rch g eken nzeich net that a tank for storing the cooling liquid has a temperature monitoring unit and / or a device for cooling the cooling liquid. 12. Cutting machine according to one of claims 9 to 11, dad u rch g eken nzeich net that a temperature monitoring unit (63, 65, 66) is formed in a liquid phase drain (72, 93, 94). 13. Cutting machine according to one of claims 9 to 12, dad u rch g eken nzeich net that a collection and return device (80) for used cooling liquid is formed in the machine housing (40).