57results about How to "Promote cleavage reaction" patented technology

The invention discloses a waste plastic molten salt cracking device. The waste plastic molten salt cracking device comprises a cracking furnace, the first end of the cracking furnace is provided with a molten salt outlet, the second end of the cracking furnace is provided with a molten salt inlet, a rotor feeder with a sealing function is arranged on an upper wall of the cracking furnace, a distributor is arranged on the position, close to the feeder, of the cracking furnace, the distributor is connected with a molten salt pump through a salt conveying pipe, all branch pipes of the distributor penetrate through the cracking furnace, a molten salt spray pipe is installed at the lower end of each branch pipe, the cracking furnace is provided with a tapered molten salt settling pond, the highest position of the upper wall of the cracking furnace is provided with a cracking gas outlet, and the molten salt outlet is connected with a molten salt furnace through a pipeline; the molten salt furnace is connected with the molten salt pump, one part of molten salt is sent to the second end of the sealed cracking furnace by the molten salt pump through the salt conveying pipe, and the other part of the molten salt is sent into the distributor. Due to the fact that the distributor is arranged, the heat transfer surface area is increased, the structure of the waste plastic cracking device is simplified, and the cracking efficiency is improved.

The invention provides an ethylene cracking furnace of a double-section heat supply structure. The ethylene cracking furnace comprises a radiation section (1), a convection section (5), a radiation coiled tube (4), a quenching boiler (6), a high-pressure steam pocket (7) and a draft fan (8), wherein the quenching boiler (6) is connected with the radiation coiled tube (4); the draft fan (8) is connected with the top of the convection section (5); and the high-pressure steam pocket (7) is connected with the quenching boiler (6). The ethylene cracking furnace is of the double-section combined heat supply structure that the radiation section (1) is internally provided with an upper heat supply section and a lower heat supply section. By adopting the ethylene cracking furnace of the double-section heat supply structure, the arrangement of a combustor and the design of a combustion tube line arrangement are simplified, the flame inside a hearth is prevented from coiling to touch furnace tubes, interference of flame is also prevented, uniform distribution of heat in the height direction inside the hearth in the radiation section is maintained, and meanwhile the emission of NOx is reduced.

The suppression of coke adherence in a reaction vessel and cracked gas pipelines at the outlet of the reaction vessel and the prevention of plugging are designed by improving the dispersion of superheated steam inside the reaction vessel to preferable conditions, and pitch having more uniform and higher quality can be produced.A cracking process in which superheated steam is directly contacted with the heavy petroleum oil by blowing the superheated steam into the reaction vessel to be thermally cracked to oil fractions and pitch, wherein the superheated steam is blown into the reaction vessel from the bottom portion thereof so that the superheated steam generates rotational flow around the central axis of the shell of the reaction vessel.