Abstract:
The invention relates to a process for separating off solid particles, in particular coke particles, from a water phase by means of gravity in a plant for generating hydrocarbons by cracking a hydrocarbonaceous feed, and also to a device for carrying out the process. In contrast to the prior art, the water phase is taken off predominantly from a point above the column bottom B via the outlet A. The first gravity separator 2 which is constructed as a multistage settling tank 2 is situated not beneath, but next to, the scrubbing water column 1. The bottom phase of the scrubbing water column 1 already acts as a part of the first gravity separator 2. Thus, via the outlet 5 in the column bottom B, a heavy water phase which is loaded with coke particles is already taken off and passed into the second gravity separator 3. This heavy water phase is further treated, together with the heavy water phase which is loaded with coke particles from the recesses 6 of the multistage settling tank 2. In this embodiment of the invention, the feed rate into the multistage settling tank 2 need not be controlled as in the prior art. The multistage settling tank 2 and the bottom phase of the quench column 1 form a communicating liquid system in which the same level of the water phase is established.
Abstract:
A collector-distributor combination in a column, which is filled with a random packed bed or with a structured packing, is disclosed. The liquid phase is guided over a collector with inclined planes to a central opening, which is connected to an ascending pipe, from which the liquid phase is distributed to the plane underneath via the distributor pipes. By guaranteeing a constant filling level of the liquid phase in the ascending pipe, the distributor functions as a pressure distributor. The liquid phase is distributed independent of the inclination of the column over the entire length of the distributor pipes. The gaseous phase passes through the collector via the chimney.
Abstract:
A collector-distributor combination in a column, which is filled with a random packed bed or with a structured packing, is disclosed. The liquid phase is guided over a collector with inclined planes to a central opening, which is connected to an ascending pipe, from which the liquid phase is distributed to the plane underneath via the distributor pipes. By guaranteeing a constant filling level of the liquid phase in the ascending pipe, the distributor functions as a pressure distributor. The liquid phase is distributed independent of the inclination of the column over the entire length of the distributor pipes. The gaseous phase passes through the collector via the chimney.
Abstract:
The invention describes a mass transfer column with at least one transfer tray via which liquid is routed in essentially the horizontal direction and through which gas is routed in the vertical direction. The transfer tray is designed as a reverse flow tray and a first separating weir (4) for changing the flow direction of the liquid flowing over the transfer tray by at least 90°, especially by roughly 180°. The transfer tray (2) is equipped with riser neck caps (3), at least one guide weir (5) for routing the liquid flow, and at least one braking weir (6) for reducing the flow velocity. The transfer tray (2) is divided into sections (7) by the separating weir (4), guide weirs (5), braking weirs (6), and column wall. The use of the riser neck caps (3) and weirs (4, 5, 6) with the resulting division of the transfer tray (2) into sections (7) ensures an almost uniform distribution of the liquid regardless of the tilt of the mass transfer column (1). The described mass transfer column (1) is thus suitable especially for use under offshore conditions.
Abstract:
The invention relates to a column (1), with a section (9), in which a filling (10) is arranged in the form of a large number of fillers or a packing, a liquid distributor (100) for distributing a liquid (F) on that filling (10), a distribution space (101) of the liquid distributor (100), via which the liquid (F) can be distributed to that filling (10) of the column (1). According to the invention, it is provided that in the distribution space (101) of the liquid distributor (100), an additional means (20) is arranged, which forms a large number of passages (21) for the liquid (F) that is to be distributed.
Abstract:
The invention relates to a process for separating off solid particles, in particular coke particles, from a water phase by means of gravity in a plant for generating hydrocarbons by cracking a hydrocarbonaceous feed, and also to a device for carrying out the process. In contrast to the prior art, the water phase is taken off predominantly from a point above the column bottom B via the outlet A. The first gravity separator 2 which is constructed as a multistage settling tank 2 is situated not beneath, but next to, the scrubbing water column 1. The bottom phase of the scrubbing water column 1 already acts as a part of the first gravity separator 2. Thus, via the outlet 5 in the column bottom B, a heavy water phase which is loaded with coke particles is already taken off and passed into the second gravity separator 3. This heavy water phase is further treated, together with the heavy water phase which is loaded with coke particles from the recesses 6 of the multistage settling tank 2. In this embodiment of the invention, the feed rate into the multistage settling tank 2 need not be controlled as in the prior art. The multistage settling tank 2 and the bottom phase of the quench column 1 form a communicating liquid system in which the same level of the water phase is established.
Abstract:
In a process for cleaning, cleaning a packed column utilized in a gas scrubbing operation wherein the packing is obstructed by solids formed during the scrubbing step, the obstructions are removed in a maximally economical fashion and without interrupting of normal operation. The packed column contains at least n, wherein n>1, superimposed packed beds spatially separated from one another. During cleaning, the lowermost up to maximally the (n-1)th packed bed are flooded with scrubbing agent. Preferably, the packed column is used for scrubbing H.sub.2 S out of a feedgas mixture with an oxidative scrubbing agent wherein sulfur is formed during the scrubbing operation and deposited in the packed beds.