JPS60105817A - Combustion of tar sand bitumen - Google Patents

Abstract

PURPOSE:To make a substantial direct combustion of bitumen by a method wherein liquid of low boiling point is mixed with tar sand bitumen having melting remained gas separated and removed under a flashing in reduced pressure to make an emulsion form and they are atomized and burnt. CONSTITUTION:Tar sand bitumen 51 stored in a fuel tank 52 is heated by a heater 53 up to such a temperature as it can be transported through a pipe, thereafter it is pressurized with a pump 55, its pressure is decreased in a flash tank 56 so as to separate the component in the gas melted in the tar 54. Then, a part of the tar 50 of which melting gas component is removed is made as a combustion tar 63, it is mixed with liquid 81 of low boiling point such as water by a line mixer 80 to make its emulsion form. Then, the produced emulsion tar 82 is heated by a heater 66 in the heating unit 65 up to such a temperature as enabling its atomization, then it is pressurized by a fuel supplying pump 67 and injected by a burner 71 together with pressurizing medium 69 such as air and burnt.

Description

[Detailed description of the invention] It is about the method.

Tar sand bitumen is an extremely heavy crude oil found in places such as Canada, Venezuela, and the United States.It is extracted by artesian oil extraction or pump extraction, and sand, salt, sludge, and moisture are simply removed.

As shown in the conventional heavy oil combustion boiler US1 diagram, the fuel 04
, the atomizing medium 05 and the combustion air 06 are introduced into the combustion furnace Ol from the burner 02 and burned, and become exhaust gas 07 and are completely discharged outside the furnace. On the other hand, the boiler feed water 08 is supplied to the boiler heat exchanger tube 03, heated by the combustion gas, and steam 0.
It becomes 9.

In such conventional combustion equipment, the above-mentioned tar sand
When burning bitumen, there are the following problems, and it has been believed that tar sand bitumen cannot be effectively used as a fuel as it is.

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

(2) It has a high coefficient of kinematic viscosity, and it is necessary to heat it to some extent when transporting it through piping.

(3) It is necessary to further heat the fuel for combustion in a burner, 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 piping, which can cause a misfire. (causing paver lock phenomenon).

The present invention was developed in view of the above points, and an object of the present invention is to provide a combustion method capable of burning tar sand and bitumen in a state close to that of raw combustion. To burn the tar sand/bitumen, the tar sand/bitumen is heated and pressurized, then the dissolved gas is separated and removed by a vacuum flannel/tube, and a low boiling point liquid such as water is added to the tar sand/bitumen from which the dissolved gas has been separated and removed. The method of burning tar sand bitumen is characterized by mixing and emulsifying the mixture, heating the mixture at a temperature that allows spraying, and spraying the bitumen with a burner.

According to the present invention, tar sand and bitumen, which have not been used effectively in the past, can be easily combusted by simply loading a simple device, and can be combusted in an extremely stable state. It is something.

A first embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

51 is tar sand bitumen, which is an extremely heavy crude oil from which sand, salt, sludge, and moisture can be easily removed.It 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. Since it has a high pour point of 20-25°C, it does not flow at room temperature. The temperature-kinematic viscosity characteristics are shown in Figure 3. It varies depending on the production area, but at 20℃ 8300
There are some as high as cs L, and it takes 4 to feed one piping shaft.
It is necessary to heat at 0-100℃ (1000-500cst)'i.

The temperature is still 70 to 210℃ (1
It has been confirmed through research that it is necessary to heat the material to a temperature of about 0.00 to 1 Qcst).

52 is a fuel tank, tar sand bitumen 51
It has a heater 53 for storing it and heating it to a temperature of 40 to 100°C that can be transported via pipes, and the heater 53 is connected to the boiler 7.
The steam 75 generated in step 3 is used to heat tar sand bitumen 51.

54 is heated tar sand picumen, 55 is tar sand picumen 54 under pressure (5 to 106/
Cnf) and supplies it to the flash tank 56.

In the flash tank 56, the tar sand bitumen 54 is processed into vacuum flasks (5 to 10 AQ/
Gas 57rf, which is dissolved in the tar 54 that has been completely heated to a reduced pressure of cn:, is separated.

The separated gas 57 is transferred to a gas transport pump 58. Gas tank 59 becomes gas 60 for sale. 61 is a heater arranged in the flash tank 56; the open part is the tar after removing dissolved gas components; the tar 6 for partially burning this tar 50;
3 is mixed with a low boiling point liquid 81 such as water in a line mixer 80 to form an emulsion, and an emulsion tar 82 is sent to a bar 71, and 62 becomes tar for sale.

The path to the burner 714 includes a transport pump 64 and a heater 6.
5 (with built-in heater 66), and a fuel supply pump 67 are installed. 68 is an emulsion tar for combustion, 69 is a pressure medium, and 70 is air for combustion, which are supplied to a node 71. 72 is a combustion furnace, 73 is a boiler, 74 is a boiler water supply, 7
5 is boiler steam, and 76 is combustion exhaust gas.

In the above-described apparatus, tar sand bitumen 51 is stored in a fuel tank 52 and heated by a heater 53 to a temperature (40 to 100° C.) at which it can be transported through a pipe. Heat the heater M with pump 55 to 5-10#, /ca 7J
The gas 57 dissolved in the heated tar 54 is heated under reduced pressure in a flash tank 56.
Separate the components of.

The gas 57 is transported to a gas tank 59 by a gas transport pump 58 and output as gas 60 for sale.

A part of the tar 50 after removal of dissolved gas components is used as tar 63 for combustion, and the rest is used as tar 63 for sale. Emulsion tar 82, which is made by mixing combustion tar 63 with a low boiling point liquid 81 such as water in a line mixer 80 and emulsifying it, is transported under pressure by a transport pump 64 to a heater 6 in a heater 65.
The fuel is heated to a sprayable temperature (70 to 210° C.) at step 6, and after pressurized by a fuel supply pump 67, it is sprayed and burned in a burner 71 together with a pressure medium 69 such as air. Also, a part of the steam 75 generated in the boiler 73 is transferred to each heater 53 , 61 , 6
6 is used as a heating source and pressure medium 69.

As a result of the above, the following effects can be obtained.

a) Cool sand and bitumen can be efficiently atomized by separating the 57 gas components dissolved in the raw material 51 using a simple device using a flano song and mixing with a low boiling point liquid 81 such as water to form an emulsion. It became possible to burn it.

b) Since the raw material tar 51 can be combusted by simply adding a simple device, its use in the country of origin is promoted.

c) Gas 60 for sale and tar 62 for sale, which are easy to handle, can be obtained as by-products.

Next, a second embodiment of the present invention will be explained based on FIG. 4.

12] is a gas transport pump, 122 is a pressure medium, and burner 7
The feed σ is sent to 1.

Reference numerals 50-68, 70-76', 80- in Fig. 4
Reference numeral 82 indicates ladle numbers 50 to 50 in FIG. 2 showing the first embodiment.
68°70-76 and 80-82, and will be explained in detail later.

This embodiment differs from the first embodiment in that an oil separator 83 and a gas transport pump 121 are added to the stem of the first embodiment (FIG. 2), and one of the separated gas components 57 is This is because the pressure medium 122 of the burner 71 is used as the pressure medium 122 of the burner 71.

With such a configuration, the following advantages can be obtained.

b) By burning the combustion tar 68 using the separated gas component as the pressure medium 122, the amount of soot and dust generated can be reduced by 17/2~3/
It can be reduced to 4.

) Even if the amount of combustion in the burner 71 is reduced, the pressure medium 12
Since a gas component is used for 2, stable combustion is possible.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a conventional combustion device, Fig. 2 is a flowchart showing a first embodiment of the present invention, Fig. 3 is a detailed surface/temperature characteristic diagram of oil, and Fig. 4 is a diagram showing a second embodiment of the present invention. 2 is a flowchart showing an example. 51...Cool sand bitumen, 52...Fuel tank, 53.61.66.Heater, 55.58.
64・67・・Pump, 56・・Furanosonk, 65・
・・Heater, 71・・Birth, 80・・Line mixer, 81・Low boiling point liquid such as water, 83・Oil separator, 82・
...Emulsion tar.

Claims (1)

[Claims] When burning tar sand/bitumen, the tar sand/bitumen is heated and pressurized, and then the dissolved gas is separated and removed by flashing under reduced pressure.
It is characterized by the fact that the tar sand bitumen from which the dissolved gas has been separated and removed is mixed with a low-boiling point liquid such as water to form an emulsion, and then the mixture is heated to a temperature at which it can be sprayed, resulting in spray combustion. How to burn tar sand bitumen.