JPS58136915A - Burning method of tar sand bitumen - Google Patents

Abstract

PURPOSE:To enable to stably burn tar sand bitumen by a method wherein tar sand.bitumen, which is classified as superheavy gravity crude oil, is gradually heated so as to remove dissolved gas contained therein by separation and, after that, heated-up in order to burn by spraying. CONSTITUTION:Gases 24 contained in tar sand bitumen (TB) 21 such as methane, ethane and the like are removed by gradually heating TB21 stored in a fuel tank 22 by means of a heater 23. The gases 24 are carried to a gas tank 28 by means of a gas transport pump 27 in order to be stored as gas to be sold 29. On the other hand, TB21, the gas component of which has been removed, is cooled down and sent to a storage tank 30 by means of a transport pump 26 so as to divide into two parts or one part for tar to be burnt 33 and the other part for tar to be sold 32. The tar to be burnt 33 is heated with the heater 36 in a heating unit 35, pressurized by means of a pump 37 and, after that, burnt by spraying together with pressurizing medium 39 such as steam, air or the like at a burner 41. The small part of steam 45 produced at a boiler 43 is used as heating and pressurizing sources of the respective heaters 23, 31 and 36.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for burning tar sand pitumen.

Tar sand bitumen/Canada, Penelazue! , is an extremely heavy crude oil produced in the United States and other countries, and is extracted by artesian oil extraction or pump extraction, and sand, salt, sludge, moisture, etc. are simply removed.

A conventional heavy oil combustion boiler is shown in Figure 1.

Fuel 04. Spray medium 05 and combustion air 06 are introduced into combustion furnace 01 from burner 02 and burned, and exhaust gas 07
and is discharged outside the furnace.

On the other hand, the boiler feed water 08 is supplied to the boiler heat exchanger tube 08,
It is heated by the combustion gas and becomes steam 09.

In such conventional combustion equipment, the above-mentioned tar sand
When burning bitumen, there are the following problems, and it was conventionally believed that tar sand bitumen could not be used effectively as a fuel as it was.

(1) It has a high pour point and does not flow at room temperature.

(2) It has a high coefficient of kinematic viscosity, so it needs to be heated to some extent in order to be transported through pipes.

(3) In order to burn with a burner, it is necessary to further heat it, but when the temperature is raised, a large amount of flammable gas such as methane and ethane is generated, and steam is generated in the fuel pipe.
It causes misfire (causing paver lock phenomenon).

The present invention was made in view of the above points, and an object thereof is to provide a combustion method that can spray-combust tar sand bitumen in an almost green-fired state. ), It is to gradually heat the tar sand bitumen to separate and remove the dissolved gas contained in the tar sand bitumen, and then heat the tar sand bitumen from which the dissolved gas has been separated to a temperature at which it can be sprayed. The method of burning tar sant bitumen is characterized by raising the temperature and burning the tar sant bitumen by spraying from a burner.

According to the present invention, tar sand/bitumen can be combusted in a stable combustion state, and the by-product gas can be used for sale or spraying, making it possible to effectively utilize tar sand/bitumen. It is.

A first embodiment of the present invention will be described below with reference to FIGS. 2 to 4.

21 is tar sand bitumen/, sand.

It is an extremely heavy crude oil from which salt, sludge, moisture, etc. are simply removed, and is produced in countries such as Canada, Venezuela, and the United States, and is extracted using methods such as artesian oil extraction and pump oil extraction. Pour point is 2
Since it is as high as 0 to 25°C, it does not flow at room temperature. The temperature-kinematic viscosity characteristics are shown in FIG. Although it varies depending on the production area, some products are as high as 8,800 cal at 20°C, and in order to transport them via piping, they must be heated to 40-100°C to reach 500-200 cst.
It needs to be heated up to. In addition, in order to perform spray combustion with a burner, it must be heated to about 70 to 210℃ and 100 to 10c8
It is necessary to base it.

22 is a fuel tank that stores the tar sand/picumen 21 and heats it to a temperature of 40 to 100° C. that allows pipe transportation.

A heater 28 gradually heats the tar sand bitumen using steam 45 generated by a boiler 48.

24 is separated and removed from the tar sand bitumen in the fuel tank 22 using gas.

25 is tar sand bitumen after gas component removal;
26 is a transport pump, 27 is a gas transport pump, 28 is a gas tank, and 29 is gas for sale.

30 is a tar storage tank with a built-in heater.

82 is tar for sale, 88 is tar for combustion, burner 41
is burned. 84 is a transport pump.

A heater 85 heats the combustion tar 88 to a temperature at which it can be sprayed and combusted by the burner 41. 86 is a heater; heater 85
located within. 87 is a pump, 88 is a combustion tar, 89 is a pressure medium (steam or air), 40 is a combustion air, 41 is a burner, 42 is a combustion furnace, 48 is a boiler, 4
4 is boiler feed water, 45 is boiler steam, and 46 is combustion exhaust gas.

The raw material tar sand bitumen 21 is in the fuel tank 22
and is gradually heated by the heater 28. The raw material tar 21 is gradually heated to about 100 to 250°C,
Gases 24 such as methane and ethane contained in the raw material tar 21 are removed. FIG. 4 shows an example of generation of gas 24 by heating raw material tar 21. The raw material tar 21 is heated uniformly within the fuel tank 22 over a long period of time (Fig. 4 port) 9 to prevent the raw material tar 21 from expanding due to the generated gas 24 and overflowing from the fuel tank 22. (As shown in Fig. 4A, a large amount of gas is generated during heating, so if the temperature is raised in a short period of time, gas will be generated violently and the tar will overflow or carry over the tank.) Gas 24 is gas The gas is transported to a gas tank 28 by a transport pump 27 and used as gas 29 for sale. Once the gas 24 components have been removed from the fuel tank 22, the temperature of the fuel tank 22 is reduced,
The tar 25 after gas component removal is at a temperature sufficient for transportation (40
~100° C.) and sent to the tar storage tank 80 by the transport pump 26. A part of it is used as combustion tar 88.

The others are sold as tar 82. Combustion tar 83 is heated to 70 to 210° C. by a heater 86 in a heater 85, pressurized by a pump 87, and then sprayed and burned in a burner 41 together with a pressure medium 89 such as steam or air. A portion of the steam 45 generated in the boiler 48 is used as the bed source of each heater 2B, 81.86 and the pressure medium 3.
9.

According to the first embodiment of the present invention as described above, the following effects can be obtained.

(a) Since the tar sand bitumen 21 is gradually heated by a simple heater 2B, the gas 24 components can be separated and sold as gas 29 for sale.

(b) The tar 25 after removing the gas component is removed from the container.
The tar 82 can be burned in the burner 41 without worrying about unstable combustion or misfire due to the phenomenon of burnout, and at the same time can be sold as tar 82 for sale.

c) The equipment is simple and the use of the raw material tar 21 in production areas can be promoted. Therefore, it can be used even in areas with limited funds.

Next, a second embodiment of the present invention will be described based on FIG.

In the figure, 88 is a gas transport pump, and 89 is a pressure medium for the burner 41.

Reference numerals 21 to 88, 40 to 46 in FIG. 5 have substantially the same configurations as reference numerals 21 to 88, 40 to 46 in FIG. 2 showing the first embodiment, and the explanation thereof will be omitted.

This embodiment differs from the first embodiment in that a gas transport pump 88 is added to the system of the first embodiment (FIG. 2), and the gas component 24 is used as the pressure medium 89 of the burner 41. be.

As a result, the following effects can be obtained.

b) Combustion tar 88 using gas component as pressure medium 89
By spray combustion, the amount of soot and dust generated can be reduced to 1/2 to 8/4.

) Stable combustion can be obtained even if the amount of combustion in the burner 41 is greatly reduced.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a conventional combustion device, Fig. 2 is a flowchart showing the first embodiment of the present invention, Fig. 8 is a diagram of oil viscosity and temperature characteristics, and Fig. 4 is a diagram showing the heating of tar sand and bitumen. A graph showing changes in temperature and changes in gas generation amount, and FIG. 5 is a flowchart showing a second embodiment of the present invention. 21...Tar sand bitumen, 28.81
・86...Heater, 24...Gas, 26.34.3
7...Pump, 41...Burner.

Claims (1)

[Claims] When burning tar sand bitumen, the tar sand bitumen is gradually heated to separate and remove the dissolved gas contained in the tar sand bitumen.
A method of burning tar sand and bitumen, which is characterized by heating bitumen to a temperature at which it can be sprayed, and then spraying it with a burner.