DE1625206B2 - Device for atomizing liquid carbon black raw material - Google Patents

Description

^different

«ES.-2i ί2 £ -η SSfernem ~ * ° Ά ^ er from the supply pipe from the central pipe through which the liquid raw material flows flowing raw liquid. off by the not high level and the by a coaxial jacket pipe surrounded by Schwindigke.t, m M * ^nte ™ ^{hr vo} ^! ^ ΐΐ "^" is through which a gas is supplied. Both tubes 45 are substantially cylindrical nor within the ^{M "ntel} ™ ^ _n" ^f 7 / "J ™ ^ and end in the same plane, torn. Line particularly powerful distribution »1 rd so that a free jet of liquid arises, which then arises when the supply pipe is arranged so that the gas flowing out at a constant speed is in its mouth in the area of the constriction of the jacket pipe , the so-called Stürz jacket pipe, possibly also outside of it

gas, divided into droplets in front of the central tube 50 central axis. .... _{M ta} , _rnU

ζτ " _ά ^y With a decreasing cross-section of the jacket pipe

In the case of another, described in GB-PS 6 99 406, the speed of the gas flow increases

In the same embodiment, gas dividing occurs and progressively, what the distribution of the Hussigkeits-

Liquid raw material improved through one or more orifices droplets. ...

into the reaction chamber after s.e. in considerable 55 Through the nozzle at the end of the jacket tube, the

Removal in front of the openings further accelerated the mist that has been mixed with one another. This

have been. Since there, “mixture of the mixing” effect is particularly strong when the nozzle is used as a

put a longer way up to the exit points Venturi tube or Lavalduse is formed. uas

must cover. If it comes into the supply pipe, the mixture reaches an extraordinarily high level

to a segregation of the components, the wide speed and turbulence in the 1 reaction space.

going to the formation of a on the pipe walls The exit speed and the jump angle

adhesive film of liquid, while this can be achieved through the appropriate choice of nozzle diameter

Gas can be influenced preferably in the middle of the pipe with a flow channel knife and nozzle shape,

paves the way and the liquid only again at the end of the pipe The technical advantage of the inventive

Tear off the wall and cut it up. ⁶ 5 device compared to that from US-PS 33 18 664

By means of these two burner constructions, the known burner design consists of the Besclileum-

Only the customary furnaces of the liquid mist after the dispersion carbon black with surface values below about 150m ² / g process are economical.

Advantage of the invention according to the invention in GB-PS 6 99 406 Well-known burner construction consists that there is no oil film on the nozzle wall d Wd hf d Air to remove coke build-up at the burner mouth. The one from the, pipe for oxygenated Gas austreter.de Gas serves just as little as the fuel gas emerging from the fuel gas supply tube d Rßhtffs the former is supposed to

There is no oil film on the nozzle wall that escapes from the fuel gas supply tube

can that sticks to the wall and only _{5 should be used} to atomize the soot raw material

Sse? -sä

Seek existing advantage over,. The way of working consists in the fact that air can be used as an additional, without it having to act as a harmful component in the reaction mixture. It has been found, surprisingly, that in the _15th experience with burners known so far, the amount of atomizing air in? Oven otherwise supplied Sri: s ^ ir: »

flowing medium. The well-known observation; , t therefore no two-substance atomizer ** ^ nridjj object, so that there are no parallels The diameter of the central feed pipe of the Ent Contraception can be changed ^ Jn ^ er ^ bt however, there is no relation to the apprehension below claim, the distance between the ends of our jacket pipe and carbon black raw material pipe in the axial direction in a certain «^" ^^^^ at

35

Can also be used for the burner according to the invention * ie on the conventional burner.

Accordingly, there is a means of earthing "If the device were to be implemented for the production of the improved furnace black, ? one ate the liquid hydrocarbon serving as raw material introduces it into a gas stream of high speed and disperses it in it, whereupon the resulting dispersion first accelerates, then m den Reaction space evaporates.

According to a particularly favorable embodiment of this special process, the hydrocarbon is introduced into a cias current in the state of euphemism.

You can do it without any disadvantage. to D.sperg.eren

12 45 877 is «in soot burner

35 J ^ '^^^ Snt, with the jacket tube ur the RuUronsion d «-. _{m | t}

M ₁ horm e.ner than Dusennu J ^

M ₁ h

a relatively wading
d

a relatively wading ^ h «whenen ^ _

ends and wöbe, da, / u uhruny.r ⁰ ^ j

commodity .η '' ^ J ^ ^11; ^^ ^ jacket pipe distance before Aubtrittsenu ·. ue

4 ° ends. _{d the duly} compliant requirements. ^ fed ^ oη d ^^^ _{des M tel}

ii f _lir , i-.s gas seated nozzle body. Also pipe ur the gas ^ ^7W » ^e _{ptschrift no} reference, iindct w je called w _to ^^

45 JjJ ^ Jj * ™ _dnct ^ _n so! .. SchHeßhch

k of the cited patent specification also about the large one is ^de ^ ^ J "J £ ^e _{pipe end} " of soot raw material

INLET PIPE ^ £ iSS £

^{messy little} "

Lerner is arranged to be slidable to the jacket pipe end atomizer gas supply pipe and carbon black raw material supply pipe practically in the same plane. These deviations cause that with the known burner the effect of the device according to the invention cannot come about.

GB-PS 8 55 802 describes a soot burner, the peculiarity of which is that an igniting Ru raw material pipe, which narrows in front of its mouth, is surrounded by a fuel gas supply pipe provided with a conical widening at the mouth, which in turn from emem at its mouth with a ^ ⁿ ! ^ce _r ^E TmSen unc

RuBnjhstoH «^ f | ^ gensund in the fact that the tf.temem forms a narrowed outlet. This results in lechLism of the Invention _{lu fundamentally} different decomposition. While according to the invention tröininin. be used and oie ^^^ _the ⁸ constriction accelerated _v " ^st ~ _n ^g ° _{through the} separate atomizer _{premixing of the} device oil and

erfo Jt, willj ⁿ ™ directed vertebrae

Luf ^ t ^ r ^ m en g B ^ ^ _{fäcner occurs} ^ _then

uSS through the widely formed hole of the End cap through.

An embodiment of the device according to the invention is shown in the drawing and is described in more detail below:

The pipe 1 is used to supply the liquid carbon black raw material. It occurs at the rear of the device in the jacket tube 2 intended for guiding the gas, runs in its central axis in the direction of the cylindrical bore 4 of the nozzle 3 and ends a short distance in front of it. The nozzle 3 forms the front part of the jacket tube 2 The distance between the mouth of the pipe 1 ^ d of the inlet opening of the nozzle is variably adjustable by means of the thread arrangement 6. In the drawing, the distance is shown so that the mouth of the pipe 1 in the area of Narrowing of the jacket pipe towards the nozzle.

In the embodiment of the device according to the invention shown, the jacket tube 2 is of the Surrounding coaxially arranged outer tube 5 for the supply of a fuel gas. The pipe 5 ends here in front of the nozzle body 3. At this point, the fuel gas emerges into the furnace chamber (not shown).

Finally, the advantages achieved with the invention are briefly highlighted:

1. Finest distributions of liquid in gas can be achieved. ..

2. Devices can be used without significant changes to the soot generation systems themselves.

3. Furnace carbon blacks with a high specific surface area (> 150m ² / g) can be produced with good yields.

4. When producing soot with reinforcing effect in rubber, good yields are achieved, high structure and improved abrasion behavior achieved.

5. Air can safely be used as the nebulizer gas.

The invention is further explained in the following by means of exemplary embodiments:

In Examples 1 and 2, the effect of the new burner is similar to that of the known burner according to GB-PS 6 99 406 compared in the production of rubber soot:

example 1
To », rstelloBg a soot with Ve.tärkerwjrku.g B eis ρ ie I 2

The burner according to the invention was used to produce a carbon black with a reinforcing effect in rubber corresponding to the embodiment shown in the drawing with the following reaction components and quantities used:

Reaction components:

Carbon black oil II 25 kg / h

Atomizer "(5 atü)"".'.".".".'.'.'.". 7 Nm '/ h
Fuel gas (town gas with an upper _{calorific value of 4500} ^ _{1 / Νιη8)} χ _{0 N} m ³ / h

Combustion air 95 Nm '/ h

The production rate of carbon black at these settings was 12.6 kg / h, corresponding to a yield of 50.3%, based on the carbon black oil used. Testing of this carbon black obtained according to the invention resulted in:

^ features:

Reaction components:

Carbon black oil II 25 kg / h
Atomization air (5 atmospheres) ......... 7 Nm '/ li

Fuel gas (town gas with an upper

ren calorific value of 4500 cal / Nm ⁸ ) 10 Nm ^a / h

Combustion air 96 Nm ¹ Yh

The production output of carbon black at these settings was 11.3 kg / h, which corresponds to a yield of 44.5%. based on the soot oil used. The test of the carbon black obtained showed:

Horse characteristics

Iodine surface area 99m «/ g

DBP oil adsorption 1.35 ml / g

Gumm! Technical test values:

Module at 300 "" elongation 139 kg / cm »

Rclative abrasion resistance 100 ",,

¹⁰²

-Oadsorption 1.38 ml / g

Technical rubber test values:

^a 5 module at 300% elongation 145 kg / cm ²

Relative abrasion resistance (based on the value of Bei- _{S pj e} j \) HO ⁰ /

The burner according to the invention thus allows the production of rubber soot, which in terms of their properties and application-related effects compared to conventional burner designs achievable rubber blacks are considerably superior and occur in higher yield.

In the experiment described in Example 3, the burner according to the invention was used to produce a Soot operated with an increased amount of atomizing air at the expense of the combustion air.

.

Example 3

The following reaction components and amounts used were used:
_{Reaction components:}

_Soot in. 25 kg / h

Atomizing air (5atü) 16Nm ⁸ / h

10

The production rate * " ^R ? ° **** &*> * ^these settings 14.2 kg / h, which corresponds to a carcass yield of ⁵ ^ ' ⁵ % ^ based on the soot oil used. ^{The ρ} ™ * ™ £ of the soot obtained :

^M carbon black stocks:

Iodine surface 103 mVg

DBP oil adsorption 1.36 ml / g

Rubber Technical Prüfwerte- _{Modu, w 300%} D _{n n} BB - ... 155 kg / cm "

Relative abrasion resistance (based on the value of two

"8th%

_6y . _wi . ^ _{n Verg} , _{cjch mh} ^^ ₂ ^, ^

Own << one with the invention Burner produced carbon black, its application effects and the yield of this

Soot is even further improved if the burner uses an increased amount of atomizing air at the expense of the combustion air is charged.

In Examples 4 and 5, the effect of the new burner is similar to that of the known burner according to GB-PS 6 99 406 compared in the production of carbon black.

Example 4

The known burner with the following reaction components and was used to produce a carbon black Use quantities operated:

Reaction components:

Carbon black oil II 25 kg / h

Atomizing air (5 atmospheres) 7 Nm ³ / h

Fuel gas (town gas with an upper calorific value of 4500 cal / Nm ³ ) 10 Nni ³ / h

Combustion air 100 Nm ³ / h

Additive KCl in aqueous solution 350 ppm / kg

Soot oil

The production rate of carbon black at these settings was 8.00 kg / h, corresponding to a yield of 32.0%, based on the carbon black oil used. The test of the carbon black obtained showed:

Carbon black properties:

Iodine surface area 189 m ² / g

oil requirement (according to the pouring point method) 262 " ₀

Nigrometer value 88

pH 9.1

Volatile components 3.4 ° "

Example 5

In order to produce a carbon black, the burner according to the invention was carried out in accordance with that in FIG The embodiment shown in the drawing operated with the following reaction components and amounts used :

Reaction components:

Soot oil Il 25 kg / h

Atomizing air (5 atmospheres) 7 Nm ³ / h

Fuel gas (town gas with an upper calorific value of 4500 cal / Nm ³ ) 10 Nm '/ h

Combustion air 97 Nm '/ h

Additive KCl in aqueous solution 350 ppm / kg

Soot oil

The production output of carbon black was with these

Settings 10.3 kg / h, corresponding to a yield of 40.5%, based on the carbon black oil used. the Testing of this carbon black obtained according to the invention showed:

Carbon black properties:

Iodine surface area 192 m ² / g

Oil requirement (according to the pouring point method) 305%

Nigrometer value 83

pH 8.9

Volatile components 3.5%

The burner according to the invention thus allows the production of carbon blacks, which in terms of their Properties and application-related effects are those that can be produced with conventional burner designs Carbon blacks are considerably superior and occur in higher yields.

1 sheet of drawings

509537/368

Claims (2)

produce. The production of carbon blacks with a larger SSa surface would in fact require considerable patent claims: increased amounts of combustion air, which would result in a very strong decrease in carbon blacks. For this 1. A device for atomizing liquid ° ^B ^ fT _{dw b} j _s ago carbon blacks having more than about carbon black raw material by means of a gas for plants for 5 """ϊ.""{""Γ ^ surface in Furnacc plants producing Furnace - Soot with a ui an IW ^ra . ' _{Made on} ^{a S} ^ nian scale. Casing arranged for the gas and within whom found in _surprise dwerweise that fcalb same ending supply pipe for the ts wurac _ specific surface, as, with the casing "a ^ f" * carbon black feedstock; Jr _SSE find U _sing, with good leads yields nozzle mouthpiece and the Zufuhrungs- ₁₀ ^ls i ^ar ° can produce n _{on] a "s} ^e _Ru if one tube for the carbon black raw material in the axial direction under in ™™ <*? '" - *, R _ußro.. hstoffs a device forming a distance in front of the Austnttsende to / f ™ "™ _{b. Ährie} surrounded construction verwes jacket tube ends, marked by the in lo.genuc Teich net. that the jacket pipe {2) amAiustntts- ^w »^ _{n is clear} for soot, which has a nozzle body (Z) at the end and that the outer tube c 5 is used Carbon black raw material supply pipe (I) arranged relative to the casing · ^^. S ^ ^^^ structure and thus tube slidably .st, wöbe, the waste ° ^ν ^ 1 ^ ° improved abrasion behavior of the two pipe ends stand from the Großen- " «« J ¹ ; _Invention is a device for ordering the diameter of the jacket pipe. Counter-band * tigern carbon black raw material by means of emc, 2. Apparatus according to claim 1, characterized in that ge * o * ™ ^U ^ ™ J? ™? Manufacture of Furnace-Ruli is characterized by the fact that the nozzle body is drilled cylindrically for systems or is designed as a venturi or lavalduse utilizing "^ ζ ™ ^ ^, ^, _ending feed tube for the Carbon black raw material, whereby the shell _The pipe leads to a nozzle mouthpiece and the Feed pipe for the carbon black raw material in the axial direction with the formation of a distance in front of the Exit end of the jacket pipe ends. The device The invention relates to a device for pulverizing is thereby ^^^ Α Ζ dusting of nutty raw material by means of a gas 30 Aujjn, ^^ J ^^ J ^^ S ^ t for an agcn for the production of furnace soot. KuUronsionzu.um distance of With the Furnace-RuB-Pro / eu, the spacing space is arranged in a sliding bar. the /. For example by burning an auxiliary two ^Rohrcn. ^ _M .X, ^ '° _s, ^"0 ^""" ⁸ gas kept at the required temperature ^ * ^ * Ζ _"τ%? ££ ^ £ _όη α" cylindrical * ird, a liquid hydrocarbon as carbon black feedstock 35 Here, the nozzle body SSSS "is hermisch decomposed or incomplete *" For oninnt ** ^^ £ ^ ^ SzÄn Ri Se