JPS5840599B2 - Method for producing gelled coal-petroleum mixture - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing an oil-in-water type gelled coal-petroleum mixture (hereinafter referred to as gelled coal-petroleum mixture) comprising a mixture of trace amounts of an emulsifier, water, petroleum and pulverized coal.

More specifically, there is a slurry [A] which is made by mixing an emulsifier aqueous solution and pulverized coal at a certain weight ratio or less, and which is made into a slurry that can be transported by pump. Mixed and made into a slurry (B
) is prepared in advance and [A] and [B] are mixed.

Conventionally, since coal is a solid, it is difficult to transport and difficult to control during combustion, making it inferior to petroleum, which is a liquid, as an energy source.

In order to overcome these problems, in Japan, prior to the Second War of Ascension, research into colloidal fuel, which was made by pulverizing coal and mixing it with petroleum, was actively conducted at naval fuel depots and other facilities.

However, if coal and petroleum are simply mixed, the coal particles will settle and separate due to the difference in specific gravity.To prevent this, constant stirring force N or the diameter of the coal particles must be reduced to several microns or less. Methods of extremely slowing down the sedimentation rate have been considered, but all of these methods are expensive and unpractical.

In addition, in order to prevent coal particles from settling, studies have been conducted on adding water and surfactants (soap) to coal and oil to increase the viscosity of oil and improve coal retention. There are no surfactants that have excellent properties and are effective in small amounts, and in many cases, the amount used is only 1
It required more than w tφ, which was an economical problem.

Recently, in the United States and other countries, attempts have been made to make petroleum into a semi-solid oil-in-water emulsion using a small amount of an emulsifier aqueous solution, mix this with pulverized coal, and burn it as a slurry. The method of mixing the solid oil-in-water emulsion with pulverized coal has its drawbacks, and quantitative continuous mixing operations are difficult, so batch-type operations are usually used, and large-scale industrialization is difficult. It is not suitable for

Another method has been considered in which the entire amount of pulverized coal to be mixed into the emulsifier aqueous solution is mixed and then petroleum is mixed.
When an aqueous emulsifier solution is mixed with pulverized coal that is only several times its weight, for example, twice its weight, the content of pulverized coal in this mixture is:
Since the mixture of emulsifier aqueous solution and pulverized coal exceeds the limit of 60 wt % that can maintain a slurry state,
This forms a lumpy dumpling-like mixture, making it extremely difficult to mix petroleum into the mixture.

Therefore, the limit that pulverized coal can be mixed into the emulsifier aqueous solution is 1.5
Since it is extremely difficult to mix pulverized coal with a weight of up to double the weight, this method uses a gel-like mixture with a high content of pulverized coal to increase the effect of increasing the amount of liquid fuel using coal. It has been impossible to produce coal-petroleum mixtures on a large-scale, continuous basis, and it has also been difficult to produce them in batches.

In view of the above circumstances, the present inventors investigated a method for producing a gel-like coal-petroleum mixture that is suitable for large-scale industrialization and has a high content of pulverized coal. and pulverized coal in advance so that the pulverized coal content is 60 wtφ or less, preferably 25 to 50
[A] made into a slurry that can be transported by pumping w tφ, and on the other hand, petroleum and pulverized coal are pre-mixed to have a pulverized coal content of 60 w with a high yield, preferably 25 to 50 w
Production of a gel-like coal-petroleum mixture, characterized in that (B) is prepared in the form of a slurry that can be transported by pumping, and (A) and (B) are mixed batchwise or continuously. invented a method.

Next, an example of a layout of an apparatus embodying the method of the present invention is shown in the attached drawing, and an overview of the method for continuously producing a gelled coal-petroleum mixture will be described.

First, an emulsifier aqueous solution W and pulverized coal C7 weighing less than 1.5 times the weight of this aqueous solution are quantitatively fed into a mixing container 3 using a pump 1 and a conveyor 2, and mixed using a stirrer 4 to form a slurry. Make a mixture (A) of
On the other hand, oil F and pulverized coal C2 less than 1.5 times the weight of this oil
are quantitatively fed into a mixing container 8 using a pump 6 and a conveyor 7, respectively, and mixed using a stirrer 9 to prepare a slurry-like mixture CB).

(A, l, and CB) at a fixed ratio using metering pump 5 and metering pump 10, respectively, in piping 11 and piping 12.
The gelled coal-petroleum mixture M is continuously produced by feeding the mixture into the mixer 13 through the mixer 13 and stirring at an appropriate stirring intensity in the mixer 13.

At this time, by arbitrarily adjusting the stirring intensity of the mixer 13, a gel-like coal-petroleum mixture having the required apparent viscosity can be obtained.

Note that the method of the present invention includes the above-mentioned mixture (A) and mixture (
It is of course also possible to produce a gelled coal-petroleum mixture by mixing B) in a conventional batch process.

In the present invention, the mixed amount of pulverized coal is 1.5 times the weight of the liquid or less, that is, the pulverized coal content in the mixture is 6 owt%.
The reason why the content is limited to the following is that if the concentration is higher than this, the fluidity becomes extremely poor.Usually, the content of pulverized coal in the mixture is preferably 25 to 50 wt %.

Of course, the lower limit is determined from the viewpoint that at least 25 w t 1 or more is required in order to increase the amount of coal fuel.

The emulsifier aqueous solution used in the method of the present invention is a nonionic water-soluble surfactant or a combination of this and a porphyrin compound separated from crude oil, etc.
t% dissolved coal, and pulverized coal is preferably 10%
Coal pulverized to 0 Mesh or less is used.

Note that when producing the gelled coal-petroleum mixture according to the present invention, in order to prevent rust from forming on metals such as iron, it is not prohibited to use a rust preventive agent in combination.

Then, when using the method according to the invention, e.g. by mixing the pulverized coal content up to a limit of 60 wtφ for each liquid to produce the final gelled coal-petroleum mixture, the conventional method emulsifier It is possible to continuously produce a gel-like coal-oil mixture with a high pulverized coal content, which could not be achieved by mixing 60 w of pulverized coal in an aqueous solution to a very high limit and then mixing this with petroleum.

Further, the method according to the present invention involves preparing a slurry-like mixture (A) in advance.
and a slurry-like mixture CB), the subsequent transportation can be done with a pump in the same way as a liquid, and the flow rate can also be controlled, which is extremely convenient in terms of handling.

As an example, a slurry-like mixture [A] and a slurry-like mixture CB) are made near a pulverized coal storage warehouse, and then pumped through a pipeline to a far-off tanker loading port and shipped. Mixtures [A] and [B] are mixed in a mixer installed at the port to create a gel-like coal-oil mixture, which can be loaded into a tanker using a pump.

Furthermore, by using the method of the present invention, when loading into a tanker, the distance between the mixer and the tanker can be shortened, resulting in a stable and highly viscous gelled coal-oil mixture, that is, a gelled coal-oil mixture with a small amount of an emulsifier aqueous solution added as an external phase. It is also possible to lower the viscosity of the gelled coal-petroleum mixture by adding a small amount of water or a low-concentration emulsifier aqueous solution when unloading it from the tanker.

Next, examples of the present invention will be shown, but the present invention is not limited to the following examples unless it exceeds the gist thereof.

Example - ■ 40 w of crude oil residue, 10 w of emulsifier aqueous solution
(inner emulsifier 0.5 w tφ) and pulverized coal 50 W
This paper describes a continuous method for producing a gelled coal-oil mixture using a screw mixer, with the aim of producing a gelled coal-oil mixture consisting of t%.

In the continuous gelled coal-petroleum mixture manufacturing apparatus shown in the attached drawing, an emulsifier aqueous solution W containing 5 wt% polyethylene glycol oleyl ether is fed into a mixing container 3 with a volume of 10 kl by a pump 1 at a rate of 1 kl (=1 ton) per hour. , while pulverized coal C of 100 mesh or less
1 at a speed of 1 ton per hour by a conveyor 2 into a mixing container 3 and mixed by an agitator 4, a slurry-like mixture (A) is prepared, while a crude oil residue, that is, a gasoline fraction In addition, crude oil F, which has been distilled to remove lighter fractions, is pumped at 4.7 kph per hour by pump 6.
Mixing container 8 with a volume of 40 kl at a speed of 1 (=4 tons)
pulverized coal C2 of less than 100 mesh
A slurry mixture [B) is prepared by conveying the mixture into the mixing container 8 using the conveyor 7 at a rate of 4 tons per hour and mixing it with the stirrer 9. Furthermore, the slurry mixture (A) is sent per hour using the pump 5. At the same time, the slurry mixture CB) is fed through the pipe 11 to the screw mixer 13 at a speed of 2 tons per hour.
The mixture is fed through the pipe 12 to the screw mixer 13 at a speed of 2.00 O
apparent viscosity of 10 by stirring at a rotational speed of rpm.
0 poise gelled coal-petroleum mixture M was produced continuously at a rate of 10 tons/hour.

Also, under the same conditions, the rotation speed of the mixer 12 was set to 3.00O.
Apparent viscosity 300 poi by stirring at rpm
A stable gelled coal-petroleum mixture M of se was produced in the same manner at a rate of 10 tons per hour.

Example-2 The purpose was to create a gel-like coal-petroleum mixture consisting of 45 wt% crude oil residue, 15 wt% emulsifier aqueous solution (inner emulsifier O, 45 wt%), and 40 wtφ of pulverized coal, and a continuous process using a fixed line mixer was carried out. A method for producing a gelled coal-petroleum mixture is shown.

In the continuous gel-like coal-petroleum mixture production apparatus shown in the attached drawing, an emulsifier aqueous solution W containing 3 wt'% polyethylene glycol nonyl phenyl ether is pumped by pump 1 at a rate of 1.5 kl (=1.5 ton) per hour. Pour into 10kl mixing container 3, while 200M
esh The following pulverized coal C1 is transported to conveyor 2 every hour.
A slurry-like mixture (A) is similarly fed into the mixing container 3 and mixed with the stirrer 4 at a speed of 1.5 ton.
is produced, while the crude oil residue F is pumped through pump 6 at a rate of 5.3% per hour.
kl (=4.5 ton) to a mixing container 8 with a volume of 40 kl, and pulverized coal C2 of 200 mesh or less was also sent to the mixing container 8 at a speed of 2 tons per hour by a conveyor 7, and then in a stirrer 9. A slurry mixture CB) is produced by mixing, and the slurry mixture (A) is sent to the stationary line mixer 13 through the pipe 11 at a speed of 3.5 tons per hour using the pump 5, and at the same time, the slurry mixture CB) is mixed. [B] is also pump 1
The slurry-like mixture [A] and The slurry mixture [B] is mixed, and the gel-like coal-petroleum mixture M
It is produced continuously at a rate of 10 tons per hour.

[Brief explanation of the drawing]

The drawing is a process flow diagram of an example of an apparatus for carrying out the present invention. W: Emulsifier aqueous solution, F: Petroleum, C
1 and C2...pulverized coal, (A)...
Slurry mixture, CB)...Slurry mixture, M...Gel-like coal-petroleum mixture, 1...
... Pump for emulsifier aqueous solution, 2 ... Conveyor 3 ... Mixing container, 4 ... Stirrer, 5
...Slurry mixture (A) transport pump, 6.
...Oil pump, 7...Conveyor
8... Mixing container, 9... Stirrer, 10
...Slurry mixture CB) Transport pump, 11
and 12...piping, 13...mixer.

Claims (1)

[Scope of Claims] 1. [A] which is made by pre-mixing an emulsifier aqueous solution and pulverized coal to reduce the pulverized coal content to 60 W t fb or less, and a pulverized coal-containing product which is obtained by pre-mixing petroleum and pulverized coal. The above (A The oil-in-water according to claim 1, which uses CB) in which the pulverized coal content is 25 to 50 wt%, and CB) in which the pulverized coal content is 25 to 50 wt%. A method for producing a droplet-type gel-like coal-petroleum mixture.