Unlock instant, AI-driven research and patent intelligence for your innovation.

Shutdown method of bubbling bed hydrotreating process

A hydrotreating and ebullating bed technology, applied in the petroleum industry, refining hydrocarbon oil, etc., can solve the problems of complicated operation process and increased cost, and achieve the simplification of operation, reduce equipment cost, and eliminate the need for density and viscosity measuring devices. Effect

Active Publication Date: 2012-08-29
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With this start-up plan, the density and viscosity of the feedstock change greatly with the increase of temperature. Although the density and viscosity of the mixed feedstock can be controlled within a certain range by adjusting the ratio of different distillate oils and heavy oil, this requires Frequent adjustment of the ratio of each component of the feed, and the need for equipment capable of measuring density and viscosity under high temperature and high pressure conditions to measure the properties of the oil on-line and closely monitor the changes in density and viscosity, which not only increases the cost but also complicates the operation process change

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] This embodiment is the start-up method of the fluidized bed hydrogenation unit. The specific operation process is: heat diesel oil with a distillation range of 200-350°C and pump it into the reactor to preheat the reactor. The heating rate of the reactor is 20°C / h. When the reactor is preheated to 300°C, switch the feed It is the residual oil raw material of molybdenum naphthenate oil-soluble dispersed catalyst containing 1000 μg / g (calculated as metal), and the reactor temperature is further increased at a rate of 15°C / h. When the temperature of the reactor rises to the reaction temperature of 430°C , constant temperature and stable operation for 8 hours, then fill the ebullating bed catalyst in the reactor at a rate of adding 2% per hour (taking the specified catalyst storage as the calculation basis) from the catalyst filling line of the reactor. The composition of the fluidized bed catalyst is calculated by weight percentage: 3% of nickel oxide, 7% of molybdenum oxi...

Embodiment 2

[0021] According to the method described in embodiment 1, the oil-soluble dispersing catalyst is changed into water-soluble heteropolyacid molybdenum, and the addition amount of catalyst (calculated as metal) is 2000 μ g / g, and others are identical with embodiment 1. The device starts normally and runs smoothly.

Embodiment 3

[0023] According to the method described in Example 1, the vacuum gas oil with a distillation range of 300-450° C. is used to replace the diesel oil pumped at 200-350° C. to be pumped into the reactor for preheating of the reactor. The heating rate of the reactor is 25° C. / h. After the reactor was preheated to 350°C, pump the residue oil raw material containing 1000 μg / g (calculated as metal) molybdenum polycarbonyl oil-soluble dispersed catalyst, and continue to increase the reactor temperature at a rate of 15°C / h. After the temperature of the reactor rises to the reaction temperature of 440°C, fill the ebullated bed into the reactor at a rate of adding 4% of the total catalyst storage per hour (based on the specified catalyst storage) from the catalyst filling pipeline of the reactor. Catalyst, other is identical with embodiment 1. The device starts normally and runs smoothly.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a start-up method for a fluidized-bed hydrogenation process. When a fluidized-bed hydrogenation device starts up, hot light distillate oil is pumped into a reaction without any catalyst to preheat the reactor; when the reactor is heated to a certain temperature, heavy oil feed containing dispersed catalysts is pumped into the reactor to further raise the temperature of thereactor; and then catalysts are added into the reactor through an online catalyst inlet pipe of the reactor; when the amount of the catalysts added into the reactor reaches a required storage amount of the catalysts, the catalysts are no longer added into the feed and the start0up of a device is complete and the device begins to operate normally. The start-up method simplifies start-up process, operates flexibly, ensures smooth start-up of the device and reduces operation cost.

Description

technical field [0001] The invention relates to a start-up method of a fluidized bed hydrogenation treatment process. Background technique [0002] With the vigorous development of heavy crude oil and the changes in the demand structure of petroleum products worldwide, the market demand for light fuel oil continues to grow rapidly and the demand for heavy fuel oil decreases rapidly. The advanced processing technology of heavy and residual oil has become a The focus of refinery industry development. Fluidized bed hydrogenation technology has the characteristics of wide adaptability of raw materials and flexible operation, and is one of the important means of processing heavy and residual oil raw materials. In the ebullating bed hydrogenation process, the mixture of raw oil and hydrogen enters from the bottom of the reactor in the way of feeding above, and enters the catalyst bed through the distribution plate, so that the catalyst is in a good boiling state to ensure that th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/20C10G45/72
Inventor 贾丽胡长禄杨涛刘建锟葛海龙李鹤鸣
Owner CHINA PETROLEUM & CHEM CORP