36results about How to "Shorten pyrolysis time" patented technology

The invention discloses a method of needle coke raw material by using delay coking technique to treat FCC slurry oil and conventional coking raw material. The method comprises: introducing FCC slurry oil with low temperature into a delay coking tower from the upper part inside the tower, leading the introduced FCC slurry oil to be contacted with high temperature oil gas generated by the conventional coking raw material which is introduced into the tower from the bottom and treated by high temperature decomposition, and reacting under the condition of delay coking; and separating the generated oil gas in a coking fractionating tower, and obtaining the needle coke raw material. In the method, as the FCC slurry oil enters into the coking tower at the lower temperature, the decomposition temperature of the conventional coking raw material is lowered, the high temperature decomposition time of the raw material is shortened, the occurrence of secondary reaction is reduced, green coke rate is reduced, the stable operation cycle of a signal tower is prolonged, and light components which have high reaction activity and are not beneficial to producing the needle coke, heavy components with high polymerization activity, and a great deal of impurities such as catalyst powder, heavy metal and the like can be removed. The obtained needle coke has high yield and good properties.

The invention discloses a method for accelerating the microwave pyrolytic process of oily sludge by pyrolyzing residue thereof, which comprises the following steps: carrying out microwave pyrolysis on the oily sludge or sludge under the condition of nitrogenization, controlling the temperature to be 700-850 DEG C and performing microwave incineration for 5-15min to obtain solid microwave residue;mixing the microwave residue with the oily sludge or the sludge evenly, wherein the weight of the microwave residue is 0.5-5% of the oily sludge or the sludge; and then carrying out microwave pyrolysis on the oily sludge or the sludge under the condition of nitrogenization. The invention can accelerate the pyrolytic process of the oily sludge or the sludge, shorten the pyrolytic time, effectivelysave the energy consumption of the oily sludge or the sludge processing, and improve the processing efficiency; the residue after the microwave pyrolysis can be recycled; and the method of the invention has low cost, is economical and can be popularized and utilized.

The invention discloses a method for producing needle coke by adopting the technique combining delay coking and kettle-type coking. The method comprises: when treating the conventional coking raw material by using the delay coking technique, introducing FCC slurry oil into a delay coking tower from the upper part inside the tower at the low temperature, and obtaining needle coke raw material by fractionating high temperature oil gas obtained by the reaction; and then, treating the needle coke raw material by using the kettle-type coking technique, and obtaining high quality needle coke. In the method, as the FCC slurry oil is injected into the coking tower at the lower temperature, the decomposition temperature of the conventional coking raw material is lowered, the high temperature decomposition time of the raw material is shortened, the occurrence of secondary reaction is reduced, green coke rate is reduced, the stable operation cycle of a signal tower is prolonged, and light components which have high reaction activity and are not beneficial to producing the needle coke, heavy components with high polymerization activity, and a great deal of impurities such as catalyst powder, heavy metal and the like can be removed. The obtained needle coke has high yield and good quality.

The invention discloses a device and method for preparing activated coke by pyrolysis of domestic waste. The device mainly comprises a drying rotary kiln, a microwave pyrolysis furnace, a pyrolysis gas combustion chamber, an air preheater, a steam generator, a coke sample activation furnace and a flue gas purification tower; the drying rotary kiln is connected with the microwave pyrolysis furnace,and a flue gas outlet is connected with the flue gas purification tower, an induced draft fan and a chimney through a pipeline; the microwave pyrolysis furnace is connected with the induced draft fanand the pyrolysis gas combustion chamber through a pipeline, a flue gas outlet of the pyrolysis gas combustion chamber is connected with the air preheater, one way of the air preheater is connected with a hot-air inlet of the pyrolysis gas combustion chamber, and the other way is connected with the drying rotary kiln; and a storage chamber is connected with the coke sample activation furnace, a flue gas outlet of the coke sample activation furnace is connected with the microwave pyrolysis furnace through a gas bypass, and the coke sample activation furnace is connected with the steam generator. The device provided by the invention is adopted to pyrolyze the domestic waste, the efficiency is high, and emission is concentrated; and the device can further prepare high-quality activated cokeand complete large-scale treatment of the domestic waste.

The invention discloses a method of processing highly-acidic crude oil through the delayed coking process; the method includes that the low temperature highly-acidic crude oil is fed from the middle-lower part and the high temperature low-acidic coking raw material is fed from the bottom; the high temperature oil gas generated by the high temperature cracking of the low-acidic coking raw materialis mixed with the low temperature highly-acidic crude oil so that the highly-acidic crude oil is enabled to realize the purpose of the deacidification through the pyrolysis deacidification under hightemperature; meanwhile, the cracking temperature of the low-acidic coking raw material is lowered; the high temperature cracking time of the conventional raw materials; thereby, the coking yield is reduced and the stable operation period of the single tower is prolonged; besides, the preheating temperature of the highly-acidic crude oil can avoid the strong corrosion stage of the acid; the corrosion on the heating device caused by the acid can be reduced or avoided when the temperature is even lower than the corrosion temperature.