CS232332B1 - Processing of producer gas - Google Patents

Abstract

The invention relates to the production of a generator gas with a reduced amount of carbon black oxidation of petroleum and tar raw materials in the range boiling point atmospheric and vacuum oil residue in which the raw material is partially oxidized by the addition of oxygen in quantity 0.776 to 0.820 oxygen and steam in an amount of 9.535 to 0.600 kg per kg feedstock at 1 330 to 1500 ° C.

Description

BACKGROUND OF THE INVENTION The present invention relates to the production of generator gas with reduced carbon black production by the partial oxidation of petroleum and tar feedstocks between the boiling point of atmospheric and vacuum distillation residues. The partial oxidation of petroleum and tar feedstocks with oxygen and water vapor yields generator gas, which is the starting material for the production of industrial hydrogen and 3 synthesis gases for methanol production, olefin oxonation and other synthesis.

In the gasification of petroleum feedstocks, the usual feedstock is the atmospheric and vacuum residue. The by-product of partial oxidation is soot, which is washed with pressurized water from the producer gas produced. This produces carbon black water, which typically contains 11-20 g of carbon black per liter. The carbon black is separated from the soot water by so-called pelletization, during which the soot is converted by means of gasoline, kerosene, black oil or other petroleum fractions into the form of well-separable balls of so-called pellets.

When gasifying the atmospheric oil residue (black oil), 2.75 to 3.5 wt. soot. It has now been found that the amount of carbon black formed can be reduced by adjusting the working mode of partial oxidation without major modifications and on already installed generators. Reducing the amount of carbon black produced is beneficial not only by producing more generator gas from the gasified residue unit, but also by consuming less oil or other petroleum feedstock when separating the carbon black from the carbon black.

Of the raw materials for partial oxidation, the input petroleum residue is the highest rated and its savings will be most apparent. Higher consumption of oxygen will have an impact on the economic evaluation only to a lesser extent, especially where oxygen is produced using coal-based electricity. The same is true for water feathers; for gasification, the entire amount of spring is obtained as simultaneously falling pressure spring.

A method for producing a generator gas with reduced carbon black production by partial oxidation of petroleum and tar feedstocks within the boiling range of the atmospheric and vacuum distillation residues is based on the feedstock oxidizing partially by adding oxygen in an amount of 0.776 to 0.82 m 2 0.6 kg per kg of feedstock and at the same time the gasification temperature is increased from the usual 1320 ° C to a value higher than 1330 ° C. The reaction temperature range depends on the quality of the lining used; The alumina-based lining can have a gasification temperature of up to 1,420 ° C and, with a higher-quality lining, even higher, up to 1,500 ° C.

A reduction in the soot production can also be achieved by the recirculation of the soot separated from the soot water in the form of pellets. Upon recirculating the carbon black in an amount of, e.g., 25 to 50%, it has been found that the resulting suspension of the carbon black and feedstock entering the gasification contain an increased amount of water, e.g., in the range of 1 to 4%. The addition of potash or soda was also beneficial.

Table 1 shows the progress of the partial oxidation of the atmospheric petroleum residue prescribed by the design and regulation, as well as the results obtained under the partial oxidation conditions modified according to the invention. From 28,000 to 30,000 m < 3 > / hour of a Generator gas of the usual composition, i.e., 10,000 m < 3 >

content c ° ₂ CO % vol. 4.5 to 5.1 45.2 to 46.5 ^H 2 46.9 to 49.0 ^CH 4 0.17 to 0.27 N ₂ + A 1.2 to 1.8 h ₂ s + COS 0.3 to 0.6

Table 1

Generator gas production with reduced carbon black production

Amount Recycle Temperature Amount Gasification conditions Pressure mazutu do soot in gene- soot to oxygen to steam kg / MPa gasification % rátor soot kg of black oil kg of black oil t / h Noc: 2 ° C water kg / h m ^{3 /} h

Partial oxidation according to the project 259 0.775 0.531 3.6 9,412 without recycle 1 320 Partial oxidation at production reduction soot 9,691 50 1 370 201 0,782 0.567 3, '6 9,616 50 1 365 209 0,786 0.567 3.6 9,565 50 1 375 197 0.799 0.542 3.6 9,750 50 1 405 176 0,800 0.550 3.6 9,100 50 1 380 160 0.792 0.542 3.6 10,200 50 1 400 185 0.795 0.558 3.6

PURPOSE OF THE INVENTION

Claims (1)

Process for producing generator gas by partial oxidation of petroleum and tar feedstocks boiling in the range of the boiling point of the atmospheric and vacuum residues, whereby the production of carbon black is reduced from the usual 2.75 to 3.5% by weight. calculated on the feedstock to a value of less than 2.6% by weight. characterized in that the feedstock is partially oxidized by the addition of oxygen in the range of 0.776 to 0.820 m ³ and by the addition of water vapor in an amount of 0.535 to 0.6 kg per kg of feedstock at a temperature of 1330 ° C to 1500 ° C.