NL8200389A - METHOD AND APPARATUS FOR PREPARING OIL, SUCH AS HEAVY OIL OR LIGHT HEATING OIL WATER, IN PARTICULAR SEA WATER EMULSIONS AND CARBON WATER, IN PARTICULAR SEA WATER SUSPENSIONS WITH A COMBUSTION FOR THE COMBUSTION SPRAYING IN COMBUSTION AIRFLOW FOR MAIN OVENS, FUEL MIXING INSTALLATIONS, COMBUSTION PLANTS AND THE LIKE. - Google Patents

Description

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- VO 3049

Title: Method and apparatus for preparing oil, such as heavy oil or light fuel oil-water, in particular seawater emulsions and carbon-water, in particular, seawater suspensions, with combustion suitable viscosity for spraying into the combustion air flow of blast furnaces, fuel mixing plants, combustion plants and the like.

The invention relates to a method and an apparatus for preparing oil, such as heavy oil or light fuel oil-water, in particular seawater emulsions and carbon-water, in particular, seawater suspensions with a the combustion suitable viscosity for spraying into the combustion air flow of blast furnaces, fuel mixing plants, combustion plants and the like.

Suspensions and emulsions, as covered by the summary term "dispersions", are understood to include systems, one phase of which is a liquid, while the other phase consists of 10 small solid particles (suspensions) or liquid particles (emulsions), the in the latter case, two immiscible liquid phases are first present separately, because of the fine distribution of the dispersed phase, a dispersion generally has an extremely large boundary flake energy, with the result that such an isothermal system tries to reduce its free energy, which leads easily. to instability of the system In order to avoid this disclosure, it has been known to stabilize such systems by means of dispersants which have as their purpose, on the one hand, to wet well the solid particles to be distributed in a liquid and, on the other hand, to protect separated particles from agglomeration.

This cannot be achieved optimally with a single substance. In addition to ionic auxiliaries, non-ionic auxiliaries are also known, in the latter case the HLB value (hydrophilic-lipophilic equilibrium) can be used to estimate which non-ionic surfactants are suitable for certain fields of application. For example, for emulsifying water-in-oil, tensides are eligible with HLB values between 3 and 6. On the other hand, when oil is to be emulsified in water, tensides are used in an HLB range between 8 and 18.

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Devices are known both for suspending and for emulsifying, such as, for example, for various agitators and machines operating on the rotor-stator principle, as well as further shaking and beating machines, vibrating machines, mixing pumps, supersonic devices and the so-called piston homogenizers.

However, it has been found that the emulsions and suspensions thus prepared do not show great resistance over time and cannot be stored in the interim after preparation, but must be used immediately.

It is therefore the object of the invention to prepare oil, in particular heavy oil or light fuel oil-water emulsions and carbon-water suspensions by a low-pressure process, which emulsions and suspensions also have a long-term resistance when, instead of water, seawater is used as the aqueous phase, so that the obtained emulsions and suspensions can also be stored for a time in the meantime, without any separation occurring. Furthermore, it is the object of the invention to design the device in such a way that the mixing ratio of the starting phases can be adjusted, maintained and changed without great control effort, without affecting the long-term resistance of the emulsions and suspensions obtained. , whereby at the same time a high efficiency must be achieved with a small labor supply.

To solve this problem, a method is proposed for preparing long-term resistant emulsions and suspensions, in which one phase consists of water or sea water, wherein the two phases of the emulsions or suspensions according to the invention to be prepared separately are pre-dosed are supplied by means of low pressure to the annular grinding space formed between a stationary ring member and a rotating member rotating therein, and into the grinding space to form eddy currents reflecting from the wall in an annular and in the center in the grinding space, spiral and conical vortex area running in the direction of flow are finely divided and mixed, after which the obtained emulsion resp. suspension after a viscosity measurement has taken place without pressure increase is fed to a combustion chamber and the like or is stored in the meantime until call-off.

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As a further solution to this task, a device according to the type described in the preamble is proposed, which according to the invention is characterized by the combination of the following features: a) two metering pumps with suction connecting stubs and pressure connecting stubs are arranged on a supporting frame; b) the pressure connection stubs of the two metering pumps are brought together in a supply line to a dispersing device; c) the dispersing device consists of a housing with a stationary, conical, toothed outer ring, and with a conical rotatable in the outer ring, with a toothing body corresponding to the toothing of the outer ring, whereby the conical shape of the outer ring and the rotary body is formed an annular crevice, which decreases in the direction of flow towards the outlet cross section, which is bounded by the cavity recesses formed by the teeth in the opposite wall faces of the outer ring and of the rotary body; d) barrier device connects a viscometer to an outlet connection stub on the outlet side.

With such a method and the apparatus carried out above it is possible to prepare long-lasting oil, in particular heavy oil or light fuel oil-water emulsions and carbon-water suspensions, which due to their long-term resistance are not directly need to be supplied to a consumption, but allow an intermediate storage over a longer period of time without their mixing, thereby providing the possibility of having such suspensions and emulsions available for a particular application at any time. It is particularly advantageous that emulsions and suspensions can be prepared with the device according to the invention, in which sea water is used as the aqueous phase.

This is particularly advantageous in the use of the present fuel mixing installation for power units, which are installed in vessels, and which therefore require flawless fuel mixing in connection with viscosity monitoring. In addition, in order to achieve a high long-term resistance, no additives must be added to the suspensions and the emulsions to maintain the stability of the emulsions and suspensions. In addition, it is not necessary to estimate, using HLB values, which nonionic surfactants or ionic auxiliaries are to be used every two. be able to emulsify or suspend phases together.

5 It is completely unimportant whether water-in-oil or oil-in-water should be emulsified. Emulsions consisting of the oil / oil or oil / carbon phases or liquids of different viscosities can also be achieved in the same manner with equally good results.

The device according to the invention can also be used with equal success when the external phase is oil or water. Surprisingly, it has been found that stable emulsions and suspensions can be obtained with the device according to the invention operating in the low-pressure process, which can only be traced back to the application of the two dosing pumps in conjunction with the specially designed dispersing device.

Solid phases, such as carbon, with a very high degree of fineness are used in the preparation of the suspensions. In addition, it has also been found to be particularly advantageous that sulfur-containing heavy oil-water emulsions, which remain stable over a long period of time, are obtained with the device according to the invention. Storage times of the emulsions and suspensions obtained with such a device carried out are several days, even if sea water is used as the aqueous phase for preparing the emulsions and suspensions. The obtained degree of fineness of the 25 emulsions amounts to a maximum of 3µ and a minimum of 2y with a larger, more even distribution of the two phases.

Surprisingly, it has been found that the formation of a very large and powerful spine in the area of the grinding gap of the disperser can be achieved when each cavity recess in the wall faces of the outer ring and of the rotating body of the disperser, an elliptical or circular cross section.

The invention furthermore provides an apparatus, which is characterized by the following features: a) a carrier is provided with a mixing motor driven by a three-speed AC motor, the mixing chamber of which 8200389 »% -Βίε the mixing chamber is connected to two suction connection stubs for the supply of the phases to be emulsified or suspended, and with a pressure connection stub, and which is provided with a control gear and such controllable device for changing the flow cross-section of the two suction connection stubs for changing the mixing ratio, as well as b) a dispersing device, which is connected via a supply line to the pressure connection piece of the mixing pump; c) the dispersing device consists of a housing with a stationary, conical outer toothed ring, and with a conical pivotable in the outer ring, with a toothing body corresponding to the toothing of the outer ring, whereby the conical shape of the The outer ring and the rotary body have an annular grinding gap which narrows in the direction of flow towards the outlet cross-section, which is bounded by the hollow-shaped recesses formed in the opposite wall surfaces of the outer ring and of the rotary body by the teeth.

The use of a single mixing pump, to which the two starting phases to be emulsified or suspended, are supplied, has given a great efficiency of the device, because it is possible to work with smaller workloads. In addition, with this mixing pump it is possible to easily change the mixing ratio of the starting phases. Maintaining predetermined mixing ratios and also changing the mixing ratios is possible without great control engineering effort. In addition, the maintenance of a mixing ratio or a change thereof can be carried out more accurately than when the two output phases are separately sucked in via pumps and fed to the disperser. In addition, a three-phase-driven mixing pump is more insensitive to disturbances than DC-operated pumps, so that a more regular operation of the device is possible as a result of obtaining faultless emulsions resp. suspensions.

According to a further advantageous embodiment according to the invention, on the carrying frame are the mixing pump with the two suction connection stubs and the pressure connection stub, a drive motor and the dispersing device 8200389

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* -β- arranged in a row one behind the other, the drive shaft of the drive motor also forming the drive shaft for the dispersing device, and connected to a drive shaft of the mixing pump for intermittent speed change.

The device designed in this way has a compact, space-saving construction, because the important elements, such as the mixing pump and the dispersing device, are driven by a single drive motor, whereby by arranging the mixing pump, the driving motor and the dispersing device in succession, only one a single drive shaft 10 is required, however, a gear must be provided between the drive motor and the mixing pump to reduce the speed of the drive shaft for the mixing pump, which mixing pump exhibits lower rotational speeds relative to the disperser.

The invention is further elucidated with reference to the drawing, in which: Fig. 1 is a spatial view of the device for preparing emulsions and suspensions; FIG. 2 is a vertical sectional view of portion of the stationary outer ring with the rotating body of the disperser; Figures 3 and 4 are vertical sectional views of various embodiments of the cavity recesses in the outer ring and the rotating body of the disperser; Fig. 5 is a front view of another embodiment of the device; Fig. 6 is a side view of the device according to Fig. 5; FIG. 7 is a top view of the device of FIG. 5; FIG. 8 is a side view of the mixing pump of the device of FIG. 5 with the control device for changing the mixing ratio of the starting phases; Fig. 9 is a front view of the mixing pump with the control device; and FIG. 10 is a side view of another embodiment of the device.

The device for preparing suspensions and emulsions 35 consists of a support frame 10, on which two metering pumps 20 and 120 8200389 r.

-7-- are fitted, of which the suction connection pumps are marked with 21 and 121 and of which the pressure connection pumps are indicated with 22 and 122 (fig. 1).

The pressure connection stubs 22, 122 of the two metering pumps 20, 120 are assembled in a conduit 25, which opens into a dispersing device 30, the outlet connection stub 32 of which opens into a known per se viscometer 40, the housing of which is provided with an outlet connecting piece indicated at 42, via which the prepared emulsion resp. suspension is drained.

The dispersing device 30 consists of a housing 33, in the inner space of which an outer ring 34 is fixedly arranged, in the inner space of which in turn a rotating body 35 is rotatably driven. Between the opposing wall surfaces 34a and 35a of the outer ring 34 and of the turning body 35, an annular grinding gap is indicated, which is indicated at 36 in Fig. 2. The outer ring 34 has a conical shape and is provided with an internal serration. The rotary body 35 rotatable in the outer ring 34 is also conical in shape and provided with a toothing corresponding to the toothing of the outer ring 34, whereby due to the conical shape of the outer ring 34 and of the rotary body 35, a smaller direction in the flow direction towards the outlet cross-section becoming annular grinding slit 36 is formed. Cavities of recesses 134 and 135 are formed by the teeth provided in the opposite wall surfaces 34a, 35a of the outer ring 34 and of the turning body 35, which, as shown in Figs. 3 and 4, can have a special cross-sectional shape. The hollow-shaped recesses 134, 135 hereby have an elliptical or circular cross-section, with the result that a swirling mixing zone is formed in the annular grinding gap, in which zone a very vigorous swirling and mixing of the two phases supplied by the metering pumps 20, 120 takes place. Particularly because of this particular embodiment of the cavity-shaped recesses 134, 135 in the wall surfaces 34a, 35a of the outer ring 34 and of the rotating body 35 of the dispersing device 30, strong eddy currents are generated, which lead to an intimate mixing, swirling and reduction of the two phases, with the result that long-lasting resistant emulsions resp.

Suspension are obtained.

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The emulsion drained at 42 resp. suspension can be led directly into an associated combustion chamber, which is designed in a manner known per se, without the addition of the emulsion or high pressure suspension is required.

The device according to Figs. 5-7 consists of a support frame 10, on which a mixing pump 220 is provided, which is provided with two suction connection stubs 221, 221a and with a pressure connection stub 222.

The mixing pump 220, in the mixing chamber 220a of which the two suction connecting stubs 221, 221a open, can be driven by a drive motor 250, which is designed as a three-speed motor with the same constant speed.

The mixing pump 220, into the mixing chamber 220a of which the two phases to be emulsified or to be suspended are fed via the suction connection stubs 221, 221a, is connected to a device indicated at 230 for changing the flow cross section of the two suction connection stubs 221, 221a. This device 230, in turn, is in communication with a control gear and the like 231, which can be controlled manually or by electric motor. Moreover, this control gear 231 can also be programmed to be programmed if an uninterrupted change of the mixing ratio is required. To change the flow cross section of the two suction connection stubs 221, 221a, each of these two suction connection stubs can be provided with a control valve not shown in the drawing. Both valves are then controllable via the device 230 by means of the control gear 231.

The pressure connection stub 222 of the mixing pump 220 is connected via a line 25 to the dispersing device 30, the outlet connection stub 32 of which can flow out in a manner known per se and not shown in the drawing. The outlet connecting stub 32 of the dispersing device 30 may also be connected to a supply line to a supply container.

In the exemplary embodiment of the device for preparing suspensions and emulsions shown in Fig. 10, the mixing pump 220 with the two suction connecting stubs 221, 221a and the pressure connecting stub 222, the drive motor 250 and the dispersing device 30 are arranged in a row in succession. arranged horizontally on the support frame 10, the drive shaft 251 of the drive motor 250 at the same time forming the drive shaft 8200389 for the dispersing device 30. The drive shaft 251 of the drive motor 250 is connected via a gear 240 for a change in speed. with the drive shaft 225 of the mixing pump 220. Because the dispersing device 30 must have a high rotational speed, while the mixing pump 220 is running slowly, the gear 240 must be connected between the drive motor 250 and the mixing pump 220 in order for the mixing pump 220 to be disperser can run at a lower speed. Preferably, the drive shafts for the driving motor 250, for the dispersing device 30 and for the mixing pump 220 are mutually aligned, so that on the basis of this arrangement of the mixing pump of the driving motor and of the dispersing device, a device with a compact construction is obtained . The entire device can be housed in a house or in a partial house 200. The latter is provided at the front, and incorporates the required on and off switches, measuring devices and control and signal lights, as well as control buttons (fig. 1). . 1 8200389

Claims (5)

Process for preparing oil, such as heavy oil or light fuel oil-water, in particular seawater, emulsions and carbon-water, in particular, seawater suspensions with a viscosity suitable for combustion for spraying into the combustion air flow of blast furnaces, fuel mixing plants, combustion plants and the like, characterized in that the two phases of the emulsions to be prepared resp. suspensions separately pre-dosed by means of low pressure are supplied to the annular grinding space formed between a stationary annular member and a rotatable rotating element therein, and therein forming spiral eddy currents and rebounding against the walls, in an annular and mid-grinding space vortex zone running in the flow direction are finely divided and mixed, after which the obtained emulsion resp. suspension after a viscosity measurement has taken place without pressure increase is fed to a combustion chamber and the like or is stored in the meantime until call-off. Device for carrying out the method according to claim 1, characterized in that two metering pumps (12, 120) with suction connection stubs (21, 121) and pressure connection stubs (22, 122) are arranged on a support frame (10 ), the pressure connection stubs of the two metering pumps being brought together in a supply line (25) to a dispersing device (30), which consists of a housing (33) with a fixed, tapered toothed outer ring 25 (34), and with a conical rotatable in the outer ring, with a toothing corresponding to the toothing of the outer ring (35), wherein the conical shape of the outer ring and of the rotatable body reduces the annular gap in the flow direction towards the outlet cross-section (36 ) formed by the cavity recesses (134, 135) formed by the teeth in the opposing wall surfaces (34a, 35a) of the outer ring and of the turning body s is limited, and a viscometer (40) with an outlet connecting piece (42) is connected to the dosing device on its outlet side (32). 8200389 -11- Device for carrying out the method according to claim 1, characterized in that a mixing pump (220) to be driven by equal speed rotary motors (250) is arranged on a supporting frame (10), of which mixing pump the mixing chamber ( 220a) is connected with two suction connection stubs (221, 221a) for supplying the phases to be emulsified or suspended, and with a pressure connection stub (222), and which is provided with a control gear or the like (231 controllable device (230) for changing the flow cross section of the two suction connection nozzles (221, 221a) for changing the mixing ratio, as well as a dispersing device (30), which is connected to the pressure connection nozzle via a supply line (25) (222) of the mixing pump (220), which disperser consists of a housing (33) with a fixed conical toothed outer ring (34) and with a conical rotatable inner ring (34) of a with pivot body (35) corresponding to the toothing of the outer ring, wherein the conical shape of the outer ring and the pivot body form an annular grinding gap (36) which decreases in the flow direction towards the outlet cross-section, which is formed by the the opposing wall surfaces (34a, 35a) of the outer ring and of the turning body are defined by cavities formed by the serrations (134, 135). Device according to claim 3, characterized in that the mixing pump (220) with the two suction connecting stubs (221, 221a) and the pressure connecting stub (222), as well as the drive motor (250) and the dispersing device (30) arranged in a row one behind the other on the support frame (10), the drive shaft (251) of the drive motor (250) at one end also forming the drive shaft for the dispersing device, and with its other end interposed by a gear (240) for speed change is connected to the mixing pump drive shaft (225). Device according to claims 1-4, characterized in that each cavity-shaped recess (134, 135) has the dispersing device (30) in the wall surfaces (34a, 35a) of the outer ring (34) and of the turning body ( 35), has an elliptical or circular cross section. 8200389