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Adding substance for reducing furnace tube deposition coking and improving liquid yield of delayed coker

A technology of delayed coking and additives, applied in cracking, non-catalytic thermal cracking, treatment equipment corrosion/fouling inhibition, etc. It can solve the problems of lack of ashless non-metallic dispersant and unsatisfactory effect, so as to increase liquid recovery and improve Yield effect

Inactive Publication Date: 2008-01-30
MAOMING KEDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of ashless non-metallic dispersant, the additive has no effect on reducing the adhesion of solid substances to the wall of the furnace tube (including the oil transfer line from the furnace outlet to the coke tower) and inhibiting the formation of coke and dry gas. very ideal

Method used

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  • Adding substance for reducing furnace tube deposition coking and improving liquid yield of delayed coker
  • Adding substance for reducing furnace tube deposition coking and improving liquid yield of delayed coker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Mix 9kg of monoethanolamine and 3kg of vegetable oleic acid, heat up to 170°C, and keep stirring, the reaction water is taken out with toluene, when no more reaction water is produced, stop the reaction, evaporate the toluene, and cool naturally to normal pressure , That is, ashless non-metallic dispersant. Then mix 5kg of ashless non-metallic dispersant, 20kg of thermal cracking initiator, 25kg of chemical reaction inhibitor, 30kg of anti-scorch agent and 5kg of solvent, and stir at 90°C for 1.5 hours. Then it is cooled to normal temperature and sent to filter to remove solid impurities to obtain the finished additive to be prepared.

Embodiment 2

[0032] Mix 9kg of triethanolamine and 3kg of vegetable oleic acid, heat up to 170°C, and keep stirring, the reaction water is taken out with toluene, when no more reaction water is produced, stop the reaction, evaporate the toluene, and cool naturally to normal pressure , That is, ashless non-metallic dispersant. Then mix 5kg of ashless non-metallic dispersant, 20kg of thermal cracking initiator, 25kg of chemical reaction inhibitor, 30kg of anti-scorch agent and 5kg of solvent, and stir at 90°C for 1.5 hours. Then it is cooled to normal temperature and sent to filter to remove solid impurities to obtain the finished additive to be prepared.

Embodiment 3

[0034] a. Evaluation method of scale and coke reduction effects of additives, the test device is shown in Figure 1.

[0035] b. Main instruments and equipment are shown in Table 1

[0036] Table 1 Main instruments and equipment of scale reduction and coke reduction test device

[0037] serial number

name

Model / Specification

place of origin

1

2

3

4

residual oil storage tank

Piston Metering Pump

Heating furnace tube

Tubular temperature controlled heating furnace

Inner diameter 150, height 400 stainless steel

Cylindrical container

J-W 0.5 / 32

4mm inner diameter stainless steel pipe

Temperature control 300±5℃, read

Number accuracy 0.1°C

self made

Hangzhou Zhijiang Petrochemical Co., Ltd.

equipment co., ltd.

self made

self made

[0038] 5

6

7

cooling condenser

Coker Light Oil Receiver

pressure gaug...

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PUM

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Abstract

An additive, which is used for delaying device coking, reducing the scaling and coking of furnace tubes and improving the yield of liquids, comprises the raw materials by the weights and portions of: 5-20 portions of ash-less nonmetal dispersant, 5-20 portions of pyrolysis initiator, 25-35 portions of inhibitor, 10-30 portions of antifoulant and 5-20 portions of solvent, wherein, the ash-less nonmetal dispersant is made by the methods that: alcohol amine and fatty acid are mixed by molecular ratio of 1:0.7-1.7, and stirred in the temperature of 170 DEG C-200 DEG C, water produced in the reaction is carried out by toluene or gasoline, and the reaction can be stopped when no more water is produced, and the ash-less nonmetal dispersant is obtained when the toluene or gasoline are steamed. When used in the coking delaying, the additive provided by the invention has the advantages of simple operation, good effects of reducing coke and scale, high general liquid yield, and good economical and technical benefits.

Description

technical field [0001] The invention belongs to the field of oil refining additives, in particular to an additive used in a delayed coking unit to reduce fouling and coking of furnace tubes and improve liquid yield. Background technique [0002] Delayed coking is a thermal processing process that converts vacuum residue oil into gas, liquefied gas, liquid oil (gasoline, diesel, wax oil) and coke through deep thermal cracking. It is a process for refineries to increase light oil yield and produce petroleum coke (CH x , where x<1) is the primary means. Compared with residual oil hydrocracking and heavy oil catalytic cracking, delayed coking has the advantages of less equipment investment, simple production process and low operating cost. Delayed coking is the preferred process for deep processing of heavy oil at home and abroad. [0003] One of the important goals of the process technology improvement of the delayed coking unit is to extend the operation cycle, reduce co...

Claims

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Application Information

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IPC IPC(8): C10G9/16C10G75/04
Inventor 梁朝林沈本贤吴世逵
Owner MAOMING KEDA CHEM
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