DE1942957C - Process for the briquetting of fine-grained cokes with baking hard coal in the plastic area of the same - Google Patents

Description

Condensation system are sucked off. known, in which the hot fine coke and the baking

3. The method according to claim 1 or 2, characterized by a stirrer charcoal over a distributing turntable, that the briquetting mix would choose! with horizontal, on a vertical shaft fend of the agitation process are supplied temporarily or continuously to agitator arms. the nuierlich cold fine coke is fed. Temperature compensation between the entered

4. Device for carrying out the process Briquetting mixture components can practically only > according to claim 1 or one of the following, begin loading in the stirred tank. Because of the big too

consisting of an intensive mixer and a quantity of material moving the 35, the mixing can be carried out in the

Intensive mixer with a double roller press. Stirring kettle only with low stirring speeds

connecting buffer with filling level. This means that there is only one in the mixture

KontiDlle, characterized in that the intermediate reaches poor homogeneity when the stirring times

Side storage tank as a stirred tank (2) with a not extended to an economically unacceptable amount

a vertical axis rotating agitator should be turned off. In addition, the constantly from

is formed and directly below the turntable from the top of the stirred tank material

opening of the intensive mixer with this verrelial amount the degassing of the one below

bound is arranged so that the vertical stirring material depending on the applied layer height more

interfere with the shaft (7) of the stirred tank [2) between the or less. An insufficiently degassed

But again, the screw shafts (20 and 21) of the intensive 45 mixture cannot be too special

Guide the mixer (1) through and through the housing pressure-resistant briquettes.

cover to a drive device (27) in principle in the manner described above.

leads is. mixing also follows according to French patent

5. Apparatus according to claim 4, marked 1 526 734, wherein the components are separated 'net by radial stirring arms (8) with vertical 5 "a stirred tank with vertical shaft and on it

The cross bar (9) on the agitator shaft (7) and the arranged horizontal rods can be entered

by bolts (11) on the stirred tank shell. the. Here, too, / u expect the mixture

6. Apparatus according to claim 4 or 5, there is only insufficient homogenization and therefore characterized in that the stirred tank (2) can only partially degas.

at the discharge opening (28) in the bottom of the Inten- 55 The object of the invention is to address the disadvantages of the sivmischers (1) is flanged. Avoid prior art and on simple

and economical way to produce briquettes with high compressive strength. According to the invention, this is thereby achieved achieves that at the end of the horizontal mixing

'60 and conveyor line db both components of the mixture

are practically completely mixed, the coal is heated to the mixing temperature and accordingly is degassed, and the mixture is immediately

The invention relates to a method for the briquette-closing stirred kettle with constant stirring Ren a mixture of coke and baking stone- 65 constant layer height between 50 and 200 cm in coal, the fine-grained coke passing through at a temperature of 20 to 300 seconds. During the Verratur Above the temperature range of plasticity in the stirred tank, the briquetting mixture makes see the state of the coal being baked and the process of refining, whereby: »completely

The dwell time of the mixture in the stirred tank coolant for the storage of a worm shaft!) can be set and switched on via the filling level in the tank and is kept from harmful overheating. To keep the filling level constant, the contact with the hot coke is preserved in the stirred kettle! It is possible to change the speed of rotation

the briquette press. The important thing is that the outlet "of the horizontal mixing of the batching process takes place over the full width of the intensive mixer and does not change so many individual conditions and that this outlet without constriction as much as possible as the adjustment of the inflow of charcoal directly Into the larger cross-section of the flow of hot coke to the intensive mixer, which also merges with the hot coke. The intensive mixer and intermediate control of the heating of the low temperature reactor are expediently connected to one another as closely and closely as is structurally possible for the production of the hot coke component. The drive shaft of the agitator in time is determined by the maximum pressure resistance of the agitator tank between the drive shafts of the internal / eugten briquette and for each briquetting material failure it is guided through the top. The drive mixture specially sought out, i ₅ for the agitator shaft is then above the Iiori-

The stirred tank also serves as a temporary mixer. In order to counteract the danger of M-line storage, which fluctuations in the quantity of caking, which can develop over longer periods of operation, ₍ in which baking coal and coke can form, it is useful to use intensive mixers) To build in removable cleaning irons, which equals from time to time. During the stay in the agitator tank you have to operate 20 times to clean the connector between the plastic briquetting mixture free-flowing and form the intensive wiper and agitator tank above which, due to the filling level, a gas-tight barrier to the Bri agitator arms can be cleaned .

wedge press down. This makes it possible for the level control in the stirred tank can, for. B.

Degassing of the gases released by baking charcoal and by means of radioactive indicators or with help Vapors from the intermediate storage are practically free of air as the torque occurring on the agitator shaft suction and take place in a concentrated form of a ments. With electric motor drives that is By-product plant for the extraction of tar, torque through power consumption and with oil-Mit'elöl and high-strength gas with separation of the Schwell drives can be measured at the oil pressure. The level indicator to supply water. is expediently provided with a signaling device

It is beneficial to keep the 30 tied during the mixing. To the level in the stirred tank in the same To keep vapors and gases at a high level during the stirring process, the speed of the one controlled by hand within ± 10 mm WS, preferably a briquette press. The speed ± 3 mm WS, constant pressure to a condenser - but can also be done via an automatic system in a dependency system suction. Pressure fluctuations that are controlled by the level indicator. + 10 mm WS significantly, cause 35 The drawing shows a device for disconnection Deterioration of the briquette quality because the method according to the invention is carried out by way of example the feed of the briquetting material, to the feeding method and shown schematically, openings of the briquette press becomes irregular. Pre-F i g. 1 shows a longitudinal section through the preferred v / is worked with a slight negative pressure. direction;

Briquetting material which degases very strongly or slowly, 40 Fig. 2 a section along the line I-I in Fig. 1 requires a long dwell time to complete the ■ and

Maturation process. To shorten the dwell time. Fig. 3 is a plan view of the discharge end of the

can be added to the briquetting mixture during the stirring pro-intensive mixer with the housing cover removed, process temporarily or continuously cold fine coke The main parts of the device according to FIG. 1 are

be added. 45 the horizontal intensive mixer 1, vertical mixer

A device for carrying out the invention is 2 and the double roller press 3. By a Leigemäß The procedure consists of an intensification4 which is pre-dried and, if necessary mix :, one immediately afterwards, put preheated charcoal in the intensive mixer 1 Stirred tank and an overnight double-led. The hot fine roller press is fed through a line 5 for forming the briquettes. As an intensive so coke, z. B. at a temperature of 750 ° C, mixed up has a mixing mechanism with rotating in the same direction. Baking charcoal and coke will work together intensively Tried and tested worm shafts. In it, the other can be mixed, with one another in about 1 minute adhesive properties that the briquetting mix temperature of z. B. 480 ° C and the when the baking hard charcoal begins to soften, decarburize according to this mixed temperature attained, mastered without difficulty. The mix falls through at the end of the mixer the. It has proven to be useful, the screw the discharge opening 28 and the short, wide intermediate passages of the shafts as a mixer with a neon piece 6 in the vertical agitator 2. This An intermediate piece is to be formed on the housing of the intensive care unit and pipe section with a diameter of the mixer fastened with a hard material reinforcement to equip the wear edges, with the 60 of the stirred tank and is with this through the flange Connected worms on the intake side of the intensive 29. The agitator shaft 7 is in the center of the agitator mixer arranged under the inlets of charcoal and boiler 2 and between the two shafts 20, Coke as spiral screws with a larger inclination 21 of the intensive mixer 1 and through its housing angles can be designed. At the outer end of the spine guided through to the drive device 27. the The baked charcoal is added to ral worms, while agitator shaft 7 has radial agitator arms 8 with vertirend the hot coke approximately at the inner end of the kalen transverse iron 9 at the free ends. Through this Spiral screw part is abandoned. The cold or cross iron is the wall of the stirred tank 2 free only moderately preheated charcoal then acts as being held back by stronger deposits. Between

3 6

Mixing arms 8 and cross bars 9 are in the wall 10 tion to prevent the charcoal from overheating when a

of the stirred tank bolt 11 attached, which prevent lead protected, j

that the mix is as a compact mass with the In Figure 3 is the discharge end of the intensive}

Mixing arms rotates. The number of the agitator arms and the mixer is shown as a top view when the | is open

The length of the cross bars are dimensioned so that the top of the case is shown. The reference numbers are correct j

Cross the wall of the stirred kettle over its entire length with the in the F i g. 1 and 2 used the same. j

Brush height. At the bottom of the stirred tank 10 is under the waves 20, 21 is the rectangular Aus!

an opening 12 through which the briquetting material is visible in the carrying opening 28, which extends approximately over the inner

Press 3 drains off. The opening 12 can extend through the width of the intensive mixer and a piece i

Flat slide 13 are throttled. In addition, io can extend over the ends of the worm flights 23.

the feed of the briquetting goods to the briquetting press through., The intermediate piece 6 is a short connection from the

the rotatably mounted tongue slide 14 controlled diameter of the stirred tank at the bottom of the Inten- '

will. sivmischers with the flange connection 29 to the agitator

The level of the briquetting in the stirred tank is boiler 2. This intermediate piece is in a known manner i

held approximately at the height indicated by 15 and / 5 designed so that it is between the intensive mixer

Thermal stresses occurring by means of radioactive indicators 16 and Geiger counters and the stirred tank

17 monitored- This level control can be intercepted by.

the measurement of the torque on the drive 27 er . The discharge opening 28 is at the same time a deduction for the addition or replacement. Gases still arising from the torque in the stirred tank 2 and controlled regulators are known for electrical and for oil pressure vapors that pass through the connector 19 on the intensive drive. According to the invention, the impulses that are sucked off by the mixer 1 and the level indicator are used to control the speed of the briquette press. Example 1 In the simplest, practically usable case, a

Deviation of the fill level from the target value as optimally 25 Predried coking coal with 23% volatile

Schcs or acoustic signal is displayed, after which the components (waf) and a temperature of 85 ° C

Briquette press is readjusted by hand. are fed into the intensive mixer 1 through line 4

The degassing of the briquetting is carried out in the stirred tank. Fine-grain coke is fed through line 5

good practically finished. The supplied with it and also in with 740 ° C. The feed rate is so reduced

Inttnsivmischer 1 released gases and vapors 3a is correct that a mixing ratio of 100 kg

are through line 19 on the discharge side of the charcoal results in 200 kg of fine coke.

Mixer? discharged and not represented by a- Both components are mixed in mixer 1. Not

The condensation device provided is suctioned off in such a way that the mixing-

that in the system mixing mechanism - stirred tank one uniergut at the discharge 28 a uniform temperature of

pressure of preferably 1 to 3 mm water column constant 35 460 "C, and the solid mixture passes through the

is held. Discharge 28 into the stirred tank 2, the intermediate

In Figure 2, the two shafts 20 and 21 are stored. Volatile components and dust, im

of the Intensivmjschers 1 drawn in cross section. The essential coke dust, are passed through the pipe

Shafts are hollow and are withdrawn 29 in a known manner.

rinsed with water, oil or the like for cooling, whereby the briquetting mixture flows in the intermediate storage 2 through the pipe 22 and with constant stirring at a speed of 30 revolutions of the agitator through the remaining cross-section of the hollow shaft flows per minute. On the shafts 20 and 21 there are two diamonds each in a pourable state, met mixing blades23 that are opposite to each other are welded on. The layer height was measured by Geiger counters. These mixing sheets 23 are guarded at 45 on the outer edges and are kept constant at 55 cm for the respective setting of 30 and replaceable, highly wear-resistant armoring. The residence times in the agitation from a hard material, e.g. B. from Widia od. Like., Container 2 were calculated, reinforced. The pieces 24 are attached. Fs became egg-shaped briquettes . -i built-in condition of the mixed shafts by OR- of about 23 g d-pulls.

niinc-n on the mixer housing for short periods of time. The mixed layer heights given in the following quality data sheets extend over the entire mixed times: area of the waves and are continuously coiled. The 55th
best forward thrust is si ii with a Nei- _Q .. ,,, .... · ~ _n ,, - _ec '·

Angle of inclination of the mixing blades to the shaft axes fS «f ° inT« / l ^ S · »«: \ <n 1 ««

fm relationship on 50 to 70 °, preferably from 55 to vTrS? ■ ^ l £ H '', '''<λan' 1J /

65-. The mixing blades end within seconds of the discharge spoon. 5Q 80 130

now 28 in front of between waves 20, 21- 60? £ ^? £ K n * ⁸ V ₁ "" ⁸ J < ¹¹ S < ¹⁰ S _B

through guided agitator shaft 7. £ S2in. «Λ ⁹ ' ^5? ' ⁵ ' ^£

On the dispensing soap of the intensive mixer 1 under (comparable to JSO; R556)

of the supply line for baking charcoal, the mixing blades are to,. ""., _A , ^{>> r}

Spiral screw This is initially a chain weight of 22 to 24 g "_; ,,

abandoned the charcoal through the nozzle 4. On S5 it can be seen that with a dwell time of around ¥

In this way, the temperature of the waves in the 80 seconds in the store 2 higher quality hot briquettes

Stuffing box bearings are kept at around 10 ° C. are obtained than with shorter and longer K ^.

In addition, with this sequence of the introduction and maturation times : A

*? 1942 957 (f

I. 7 8

, ^ f ₁ Example ^{2 after} dwell times of 180, 260 and 350 seconds

'■ ^% p fed into the briquette press.

In the same plant, fine-grained baked charcoal is produced. Egg-shaped briquettes with pieces of fine grain size range from 0 to 1 mm and with weights from 45 to 50 g. For these, larger, hot 30% volatile components (waaf) dry in the 5 briquettes, the following intensive mixers 1, depending on the ripening time, were entered. Fine-grained coke gigen quality characteristics determined:

ϊ a temperature of 780 ° C is added, where o "u-" un, "u - ~ ~ in ο« ηη

that the abandonment rates are so attuned? that for every 100 kg of _D there are 2 45 2 3 215

^ baking coal 165kg fine coke in the mixer ^ SS ^ S ^ k'V. la * IM W

^ must be entered. ^Lö pressure resistance in kg ...... 190 240 175

λ ^Ν λ? t ^{mer Dur} f ^la " ^fzei j ^ν ° η.5Ο seconds shows _Ä briebswe! tM10 in · /. ... 7.8 6.5 10.0 *

, the ^ mix at the discharge; of the mixer28 _{one (ve rgr c} ichbarmitJSO; R556)

high temperature of 485 ° C and is used in the * = »'

Stirred tank 2 entered. It is noticeable that the compressive strength after longer

'' In the stirred tank, layer heights of 70, 95 15 residence times fell again very sharply and ^r equal-

and 120 cm and the briquetting mixture measured higher abrasion values: were.

1 sheet of drawings

9M "629/284

Claims (2)

I '2 «, hard coal in an intensive mixer with degassing ■ ·. Claims: run through a horizontal mixing and conveying line and are combined to form a mixture, des- 1. Process for briquetting a mixture sen temperature in the plastic range of the backenaus Coke and baking coal, with the 5'den coal lying and then briquetted fine grain coke with a temperature above will. the temperature range of the plastic state from French patent 1,388,566 of the baking coal and the stone cave, such a »method is already known in which the in an intensive mixer with degassing a mixture coming from an intensive mixer horizontal mixing and conveying path transit ta addition of water or water vapor to minde- run and combined to a mixture v / crden, least 2O ⁰ C, preferably by 50 to 100 ⁰ C, off whose temperature is in the plastic range that cools, while a second intensive mixer ■ baking hard coal lies and then passes through the stage, the addition of water or is briquetted, marked by water vapor, soft the degassing of the mixture η e t, that ends at the end of the mixing and conveying section 13 of coke and baked coal, means the two components of the mixture practically full but a not inconsiderable effort, also from are constantly mixed, the coal on that of the structural design of the plant. For this Mixed temperature heated and accordingly comes that the coke-coal mixture, its is degassed, and the mixture abruptly undergoes immediate degassing by adding water. subsequent stirred tank with constant rest ao is broken, at its mixing temperature not yoll- ren can degas at a constant layer height between 50 and continuously and therefore still one , Runs through 200 cm in 20 to 300 seconds. certain proportion of relatively volatile components 2. The method according to claim 1, characterized in that which remains in the briquetted mixture indicates that the mixing process and the compressive strength of the briquettes produced are affected resulting vapors and gases 05. at one within ± 10 mm WS, preferred is furthermore from the French patent specification wise ± 3 mm WS, constant pressure to a 1 341 825 a process for hot briquette production