DE1952346C3 - Device for separating hydrogen sulfide and carbon disulfide from gases containing oxygen - Google Patents

Description

3 4

neither an indication of how the sulphurous will be. This will cause corrosion as well

hydrogen and carbon disulfide removal to avoid undesired by-product formation,

prevent corrosion problems, the system can be operated economically because

nor is it reduced due to the absence of a desorption time and thus the amount of steam

Partition between adsorber and heat exchange 5 will be. The loading gas drying now takes place

shear units the disadvantage of the * treatment always with exiting from the lower adsorber tank

both activated carbon layers to be charged with water vapor. An additional heating of the loading gas

lift. prior to entry into the adsorber tank is not necessary,

In the case of the device for separating adsorbable baths, the positive heat effects of the sulphurous water Substances from gases or vapors in accordance with German io stoff implementation in the lower activated carbon layer

Patent 832600 are two on top of each other with a sufficiently high heat content of the exhaust gases

has demonstrated arranged spatially separated adsorber beds. The loading gas drying has the advantage

seen, but alternately in the adsorption that the adsorber immediately after the U-

and desorption phase. With this device sorption again in the industrial to be cleaned can of course a simultaneous separation 15 exhaust gas flow can be switched on,

of hydrogen sulfide and carbon disulfide in The number of regenerations of the

Do not perform separate activated charcoals. carbon-laden activated carbon layer will ever

The object of the invention is to provide a device for after hydrogen sulfide-carbon disulfide V er

The separation of hydrogen sulfide and the sulfur content in the exhaust gas is a multiple of that of the

Provide carbon, which are the known after-20 Ren layer. . .

share does not own. In particular, if there is little in- For extraction of the lower activated carbon layer, wiro

Investment effort almost completely flooded the Randzo with carbon disulfide and then flooded it

moisture that is emptied in the conventional process. If necessary, this process can

be repeated by radiation losses and heating up of the. The extraction closes in Adsorber jacket and the brick lining occurs and the activated carbon is usually heated up

too early and undesirable carbon disulfide introduction of steam.

Material breakthroughs leads to be eliminated, so that the The invention is closer to hand of the figures

officially required compliance with emission values and, for example, explained. It shows

is guaranteed. Fig. 1 is a diagram of the inventive pre-

The object is achieved in that the device 30 direction and

for the separation of hydrogen sulfide and F i g. 2 shows an enlarged section of the Ga- Fig. 1 marked with a circle in front iron containing carbon disulfide from oxygen with two superimposed, each with device parts. Adsorber containers filled with activated charcoal, which are connected via the hydrogen sulfide to be purified and a line containing a shut-off device, via the connections, according to the invention in such a way designed 11 and 13 as well as the riser 9 in the ^un j ^ere "« ■ is that the adsorber tank (1, 3) in the adsorber tank 1. When flowing through the lower lower part are lined and that the upper activated carbon layer 4 is the hydrogen sulfide Ka adsorber tank (3) above the brick lining a analytical through the iodine-containing activated carbon and the oxygen contained in the jacket (8) made of corrosion-resistant material to elementary welding, which with the outer wall (33) forms a heated layer 4, loaded with sulfur, which forms an annular chamber (34) that can be acted upon. Via the connecting line 10, the gas which has now advantageously been purified of hydrogen sulphide is transferred to the lower adsorber container which is passed, for example, with a coarse-pored activated carbon with a piece of iodine 2 around it into the upper adsorber volume of 0.25 to 1.5 vol, preferably t% and 45 ter3. The carbon disulfide is adsorptively from aer a most common pore radius of 6 to 8 A and the upper activated carbon layer a ™ ^ " ⁰ ™ -Key ¹¹ ,: upper adsorber container with a hydrophobic, fine The now cleaned gas is via the valve 1 norigen activated carbon with a common Porenra- directed into the open. "wMitd dius of 4 to 5 A charged. Since the capacitance of the lower Aküvkohleschirht 4 the hydrogen sulphide and disulphide 50 for sulfur substantially greater ιΛ than that of the ooeren material to be freed gas is from bottom to top layer of activated carbon 5 for Schwefelkohlenstott is passed aedurch the inventive device. in ren frequent regeneration is required, the lower layer of activated carbon is the sulphide for regeneration, the upper AKtivkoniescmuii serstoff removed from the activated carbon in the form of air oxygen in the & ^sa ™ ¹ ™ is first received by elementary sulfur . That of 55 device by protective gas, which via the valve 1 sulphurous water The freed gas gets into the inlet and via the connecting line IU, the upper layer of activated carbon rises and is there from the heavy pipe 9 and the valves 13 and 11 flows, displaced, freed carbon. After sufficient protective gas pulsing, the desorption or extraction can be closed for each valve 11, 13, 14 and 16. The upper adsorber container can be done separately. For desorption 60 adsorber vessel 3 is the ^ρ ε5ΟΓ Ρ ¹¹ ° ^{_η ς} ^ ^Γ6 ": the upper adsorber is passed steam while the lower adsorber vessel 1 by USER of OBEA on the activated carbon and a partial remains gas _v stream for heating the annular chamber. branched off. For desorption ™ ^ ^^^ "^" T ei " _er The connecting line between the lower and upper tile 18 and 17 is initiated. To avoid this, the container is shut off by an automatically moist edge zone in the charcoal chamber, so that the lower jacket 8, which defines the inner boundary, does not come into contact with steam and chamber 34 (Fig .2) forms, stays cold for safety reasons. In the meantime, it can be heated with steam with a little delay under protective gas, υ

Entry takes place via valve 20. The condensate formed in the annular chamber 34 is discharged via the siphon 21 derived. The excess steam escapes into the open. That from the activated carbon layer S through the ceramic Desorbate escaping from the perforated plate base 7 enters an acid-resistant brick lining 6 Space and is diverted through the valve 19.

After the desorption has ended, the adsorber containers and 3 switched into the loading gas flow by closing the valves 17, 18, 19, 20 and the Valves 11,13,14 and IS are opened.

The expansion or control fittings 29 and 30 are only open when the associated Main fittings are closed.

For the regeneration of the lower activated carbon layer 4, which - albeit far less frequently - as a rule is carried out together with the upper activated carbon layer 5, the entire device flooded with water via the valves 28. The gas in the container is released through the valves 23, 13 and 11 displaced into the loading gas line. Then the remaining gas space is in both activated carbon layers flushed with protective gas so that the oxygen content is lowered to the desired level will. Due to the water filling, only a small amount of protective gas is required. After sufficient With inert gas purging, the corresponding fittings are closed and the adsorber is opened of the valve 22 is connected to a breathing gasometer. Washing the activated carbon layers with water can be used continuously (valves 24 or 25 with 26) or discontinuously for the upper and lower layers (Valve 27).

Extraction of the underlayer with carbon disulfide takes place by flooding from bottom to top and subsequent emptying via valve 27. After the extraction is complete, both activated charcoal layers are first sprayed with water vapor, which is passed through the Throttle 31 and the valves 17 enters and can exit via the drain valve 27, from above to

ίο warmed up below. To use the full amount of steam To desorb, the valves 18, 19 and 23 are opened and the valve 27 is closed. The upper adsorber tank 3 is here from top to bottom, the lower adsorber container 1 (via the valve 23 and the riser pipe 9) dampened from bottom to top. The vapors pass through valve 19 to Condensation.

The drying and cooling after this regeneration process takes place with fresh air, which is fed through the valve 12 enters, the entire device flows through from bottom to top and via the valve 15 again leaves.

In Fig. 2, the reference number 32 denotes the side part of the acid-resistant lining 6. The ceramic

The perforated plate floor 7 lies on a shoulder of the brick-lined Wall 6 on which the jacket 8 is made of corrosion-resistant material (e.g. V4A steel) is continued. At the level of the transition point of parts 8/6, a siphon 21 leads condensate out of the heatable annular chamber 34 delimited on the outside by the outer wall 33.

1 sheet of drawings

Claims (1)

Working method considerable amounts of the substances that Claim: not only separated from the exhaust air, but also as valuable materials are to be recovered, as Device for the separation of sulfur-worthless secondary products veiloren.
Hydrogen and carbon disulfide from oxygen 5 In order to eliminate these disadvantages, pre-sulphide-containing gases have been provided with two superimposed hydrogen sulfide from viscose exhaust air, each filled with activated carbon to activated carbon with conversion in elementary adsorber containers, which are separated via a with a waste sulfur, by connecting an iodine-containing active shut-off device, carbon is used, the iodine content of which, based on the fact that the ad io the weight of the activated carbon, 0.1 to 3%, preferred sorber container (1, 3) in the lower part is wise 0.5 to 1%, is (German patent masonry and that the upper adsorber container 1 224865). The then still carbon disulfide (3) a jacket (8) of exhaust air holding the brickwork can have corrosion-resistant material for separating it, which is also provided with activated carbon via an overlying wall (33) which is also charged with heating means Adsorber bed passed shockable annular chamber (34) forms the. For regeneration, the lower one is iodinated Activated carbon is repeatedly flooded with carbon disulfide from below and then blown out with steam. The top layer is made by evaporation ao regenerated from top to bottom. One the two Layers separating intermediate floor with lateral drainage can be at the optimal height, which is results from the composition of the exhaust air to be cleaned, be arranged. The invention relates to a device for waste as Although the aforementioned method was able to prevail in the separation of hydrogen sulphide and sulphurous sulphides, the devices are made from oxygen-containing gases with two conditions in which it is carried out, with certain features, each with Activated charcoal gels. The previously built systems for ad-filled adsorber containers, which are connected via a line provided with a sorption of carbon disulfide and sulfur water shut-off device. The separation of these compounds from an activated carbon bed, whereby the adsorption from the bottom of the gas mixture, for example the exhaust air in the case of the vis-up and the desorption in the countercurrent to the kose processing, is carried out on the one hand for reasons. It is customary to obtain these compounds for sulfur dioxide environmental protection and, on the other hand, for desorption of carbon back by means of water vapor. 35 complete activated charcoal, i.e. not only the one not impregnated with iodine from the German Auslegeschrift 1 244 119, but also one impregnated with iodine for the joint separation of activated charcoal, to heat and to act with steam to be carbon disulfide and hydrogen sulfide. This process step claims unnecessary exhaust air, in which the exhaust air with a tigerweise the iodine-containing activated carbon of the lower NHj content below 0.02 percent by volume from below 40 layer and at the same time increases the vapor consumption upwards due to the load in the load. Further deficiencies result from the fact that the Tatsorber is directed. The extraction of the sulfur formed during adsorption / desorption, among other things, from the activated charcoal absorption, in particular by carbon disulfide followed by carbon disulfide, the small amounts of activated charcoal bed or its lower, sulfur-containing bed resulting from the entire decomposition acids are corrosive and are therefore routed from top to bottom for the construction of the device part. For the treatment of high-alloy steel or a corrosion protection, steaming of the extract obtained in this way, for example by means of an iron resin coating or ceramic, finally the vaporous carbon disulfide is used. must be seen.
sorbate of the adsorber in the desorption phase A far- ·>! Disadvantage of previous constructions over. 50 is that Jarc; ^ '^ dabstrahlation and / or irregular- In this process, however, the bite-sized auiv>. >: g of the adsorber walls and exudate from ammonium sulphate as a result of oxidation brickwork, shining edge zones in the activated carbon of the hydrogen sulfide appear above the elementary layer, which reduces the active surface of the activated carbon disulfide in these zones to carbon. This will result in the oxidation of the 55. As a result, the system cannot optimally utilize hydrogen sulfide and the adsorption of the. Compliance with carbon disulfide is also impaired. In addition, emission values made it difficult to
If ammonia is present, decomposition occurs. The aforementioned deficiencies can also be found in the presence of carbon disulfide. Use of the adsorption device according to The regeneration of activated carbon does not, according to German patent application 1 544 065, only cover the extraction of the on the ben. It is used to solve the sulfur deposited during the adsorption of carbon dioxide and the desorption sen with high heat of adsorption and / or decomposition of the hydrogen sulfide, but also to solve the problems arising from the washing of the ammonium sulfate. This last gas-facing end face of adsorber-named operation is so often necessary that the 65 heat exchanger units merge into one another without a partition wall and load capacity of the activated carbon for elementary cross-sectional constriction, and the sulfur and carbon disulfide can only be partially used by individual units from a common outside. Also go with this coat you are surrounded. This reference contains