The way to reduce freezing of petroleum coke

 

(57) Abstract:

The invention relates to the technology of application of preventive antipremerskih funds, the preparation of carbon materials for transportation and can be used to reduce the freezing petroleum coke. On petroleum coke and the inner surface of the rail p/cars put antiprotease tool containing gas, wikipedi temperature 160-3300With from the processing of raw materials, comprising, in wt.%: 1-20 heavy pyrolysis resin, 1-20 heavy catalytic cracking gas oil and the rest of the tar, or means, optionally containing 1-5 wt.% extract oil selective treatment, application by spraying on a moving conveyor coke and on the inner surface of the rail cars. Use antiprotease tool with a total flow rate of 0.07 to 0.70% by weight of coke. The method reduces smartiest petroleum coke and reduce costs when it is unloaded from rail cars. 1 C.p. f-crystals, 3 tables.

The invention relates to the technology of application of preventive antipremerskih funds, namely the preparation of carbon materials for transportation, and the conditions and unloading petroleum coke in the winter associated with an increased content of water and certainally during transportation by rail, which leads to increased costs for transportation and unloading of the consumer. It is considered economically feasible to apply preventive antiprotease means for processing petroleum coke during its transportation in the winter time.

Currently, to reduce the freezing coke during transportation used antiprotease means that the amount of 0.8 to 3.0 wt.% applied to the surface of coke when it is loaded into wagons fine spray nozzles (pohodenko N. T., Brands B. I. Receipt and processing of petroleum coke. - M.: Chemistry, 1986, S. 289-293). As antipremerskih funds used oil, straight-run petroleum fractions, glycerin, resin, chlorides of magnesium and calcium, nonionic surfactants.

The disadvantages of this method are:

- high cost of reagents - distilled oil fractions, glycerin, chlorides of magnesium and calcium, nonionic surfactants;

the difficulty of transporting reagents and preparation of solutions;

- low efficiency of some of the funds;

- deterioration in the quality of coke when using inorganic compounds.

In addition, to reduce the freezing of coal and coke during transport used is the cracking of the residue in oil coking, with a flow rate of 1-1 .5% on the weight of the coal or petroleum coke, described in (Sunyaev H. I., ol'kov P. L., O. Rogachev et Nigrin - new product against freezing and primerzanie. - Ufa, Bashkir publishing house, 1977, S. 41-48).

The disadvantages of this method are:

the complexity of transportation and cooking;

- no cracking residues because of the closure of installations of thermal cracking units;

- low efficiency.

The closest in technical essence is a way of reducing the freezing of petroleum coke using as antiprotease means of straight-run diesel fractions, gas oil coking and catalytic cracking, wikipaedia within 180-350C, as described in (Z. Syunyaev I., ol'kov P. L., O. Rogachev et Nigrin - new product against freezing and primerzanie. - Ufa, Bashkir publishing house, 1977, S. 15). The disadvantage of the prototype is relatively low effectiveness against freezing coke due to low-temperature characteristics antipremerskih funds (pour point).

An object of the invention is to reduce the freezing petroleum coke, reduction of costs (material and labor) when t is again the train cars antiprotease means, which is used as the oil coking or composition consisting of gas oil coking and extract oil selective treatment, with the following composition, wt.%:

Extract oil selective treatment 1-5

The oil coking Else

The oil coking boils within the temperature 160-330N

- Use in the production of oil coking raw coking, consisting of, in wt.%: heavy pyrolysis resin 1-20; heavy gas oil catalytic cracking 1-20 and tar - rest.

- Use antiprotease funds with a total flow rate of 0.07 to 0.70% by weight of coke.

Comparative analysis of the present invention with the prototype shows that in both cases antiprotease tool represents a hydrocarbon fraction that is obtained from the delayed coking unit. The differences between the invention of the prototype are:

- use of hydrocarbon fraction other fraction composition;

- the use of mixed raw materials for oil coking, allowing it to adjust its component hydrocarbon composition;

the additional introduction of the Antip the reduction in freezing petroleum coke is confirmed when conducting pilot tests.

In the experiments used a damp petroleum coke from the delayed coking unit.

To reduce the freezing coke during its transportation in the winter were tested antiprotease means consisting of oil coking different fractional and component composition, obtained by carbonization of raw materials of different composition (see table.1), as well as mixtures of oils with the addition of heavy oil residues (see table.2). From the above table. 2 data shows that with the introduction of raw coking of heavy pyrolysis resin (hereinafter "SCC") and heavy gas oil catalytic cracking (hereinafter TGCC) there has been a change in the composition of the resulting gas oil coking in the direction of increasing the content of aromatic hydrocarbons and lower - olefin (as evidenced by the decrease in iodine number).

The experiments were conducted in a special metal layouts (the material of the Article.20, dimensions: length = 600 mm, width=, height = 300 mm, volume = 54 DM3) simulating railway wagons (reduced approximately 1000 times), used for the transportation of petroleum coke.

When testing petroleum coke was loaded to the top edge in the layout, pre-processed antipr is directly loaded on coke. Metal layouts loaded with coke kept at low temperatures in 2-3 days until complete freezing of the total volume of coke. After the end of the experiment produced unloading petroleum coke from the layout and evaluation steps antiprotease funds. The main criteria in assessing the effectiveness of actions antipremerskih funds are:

- adhesion (primerselect) coke to the walls and bottom metal layout;

- smartheat volume of coke in the layout;

- the complexity of the discharge of coke from the layout.

The conditions and test results are presented in table.3.

The test results showed:

1. When coke without the use of antipremerskih funds at low temperatures there is a strong adhesion of coke to the metal surface layout, high smartiest coke (see tab.3, example 1). During the discharge of coke from metal layouts had to make significant mechanical impact.

2. When using gas oil coking fractional composition of 180-350C, obtained by carbonization (see tab.1, samples No. 1, 2 - the prototype), and mortar cracking-residue in the oil coking received the worked surface and certainest coke for the volume layout. This is due to the high pour point of the oil coking fractional composition of 180-350C (-14-18C) and low content of aromatic hydrocarbons.

3. Use as antipremerskih means of oil coking fractional composition 160-330C, obtained by coking mixed raw materials (see tab.1, samples No. 3-6), and composition of the extract selective refining of oils and gas oil coking (sample No. 5, see table.1) reduces the adhesion (primerselect) coke to the metal surface to reduce smartiest coke and facilitate its discharge from the models (see tab.3, examples 3-6). This is due to the low pour point (-30-45C) oil coking of this fractional composition and high content of aromatic hydrocarbons (see table.1), which improves the adhesion of oil coking to the surface of the pieces of coke and the metal surface.

4. Optimal results are achieved when sprayed antiprotease tools in fine condition directly on the metal surface layout and simultaneously moving through the pipeline petroleum coke. This nabludau layout. The thus treated coke quite easily unloaded from metal layout.

The effect antiprotease means is to prevent contact of the metal surface of the car with a bulk cargo and granules of bulk cargo between them.

Implementation of the proposed method of reducing the freezing petroleum coke will reduce its certainest and reduce the cost of transporting and unloading of the consumer.

1. The way to reduce freezing of petroleum coke by treatment with antipaternalism means consisting of gas oil coking, characterized in that the use of a preparation containing gas, wikipedi temperature 160-3300With from the processing of raw materials, comprising, in wt.%: 1-20 heavy pyrolysis resin, 1-20 heavy catalytic cracking gas oil and the rest of Sara sprayed onto moving conveyor coke and on the inner surface of the rail cars.

2. The method according to p. 1, characterized in that the total consumption antiprotease means is of 0.07 to 0.70% by weight of coke.

 

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