CN101865463B - Petroleum coke power combustor - Google Patents

Abstract

The invention discloses a petroleum coke powder burner, which comprises a coaxially arranged feed pipe, a primary wind turbine, a secondary wind turbine, and a combustion cylinder. A petroleum coke powder concentrator is arranged in the primary air passage, and the combustion cylinder The jacket has a secondary air channel, the secondary air channel is connected with the secondary wind turbine, the petroleum coke powder concentrator is connected with the thick petroleum coke powder channel and the light petroleum coke powder channel, and the thick petroleum coke powder channel is connected with the light petroleum coke powder channel. The petroleum coke powder channel communicates with the primary combustion chamber and the secondary combustion chamber respectively, the primary combustion chamber communicates with the secondary combustion chamber, and the secondary combustion chamber connects with the secondary air channel to the furnace. In the present invention, two-stage combustion technology is adopted, which increases the space and time for combustion of petroleum coke powder airflow. The present invention utilizes the primary wind turbine to send primary air to enhance the disturbance, and also utilizes the secondary wind turbine to send secondary air to form a rotating jet to entrain high-temperature flue gas so that petroleum coke powder is easy to ignite and burn.

Description

A petroleum coke powder burner

technical field

The invention relates to a petroleum coke powder burner.

Background technique

Petroleum coke is a product obtained by distilling crude oil to separate light and heavy oil, and then thermally cracking the heavy oil. From the appearance, the coke is black lumps of irregular shape and size (or Particles) with metallic luster, coke particles have a porous structure, the main element is carbon, accounting for more than 80wt%, and the rest are hydrogen, oxygen, nitrogen, sulfur and metals. It is mainly used to produce carbon products, such as graphite electrodes and anode arcs, for steelmaking, non-ferrous metals, and aluminum smelting; to produce silicon carbide products, such as various grinding wheels, sand skins, sandpaper, etc.; to produce commercial calcium carbide for production Synthetic fiber, acetylene and other products; also can be used as fuel.

As crude oil becomes heavier, the market for heavy fuel oil shrinks, and the environmental protection requirements for gasoline and diesel quality increase, coking has become an important means of processing residual oil, followed by more and more petroleum coke being put into the market. In 2008, China's total domestic petroleum coke output was 15.67 million tons, an increase of 11.1% year-on-year; the net export volume was 877,000 tons, an increase of 4.4% year-on-year; the apparent consumption was 14.79 million tons, an increase of 11.5% year-on-year; Except for August, the export volume of domestic petroleum coke is greater than the import volume throughout the year, and the domestic petroleum coke is in a state of overall supply exceeding demand. In 2008, the consumption structure of petroleum coke in China was as follows: electrolytic aluminum industry 60%; carbon industry 20%; industrial silicon and smelting industry 7%; fuel 13%. Petroleum coke still has potential as a fuel.

The calorific value of petroleum coke is twice that of ordinary coal. Using petroleum coke as a boiler fuel to replace coal or oil can generate steam for power generation and heat supply, turning waste into treasure, which has huge economic benefits. Generally speaking, as long as the calorific value reaches 8300-8500 kcal, petroleum coke can be used, and the calorific value of 1.1-1.2 tons of petroleum coke powder is equivalent to 1 ton of fuel oil. At present, the highest price of domestic petroleum coke is about 1200 yuan/ton, the cost of processing into coke powder is about 200-300 yuan/ton, and the price of better quality residual oil is 3450-3550 yuan. Petroleum coke contains less ash, and its combustion has less impact on the environment. However, due to its low volatile content and high carbon content, petroleum coke is difficult to ignite. Therefore, there is an urgent need for a petroleum coke powder burner that is easy to catch fire, energy-saving, environmentally friendly and safe.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the above-mentioned deficiencies in the prior art and provide a petroleum coke powder burner that is easy to catch fire, energy-saving, environmentally friendly and safe.

The technical scheme adopted in the present invention is:

A petroleum coke powder burner, comprising a feed pipe, a primary wind turbine, a secondary wind turbine, a petroleum coke powder concentrator, and a combustion cylinder, wherein the feed pipe, the primary wind turbine, the secondary wind turbine, and the combustion cylinder are sequentially Shaft arrangement, the primary wind turbine is set on the feed pipe, the primary wind turbine and the outlet of the feed pipe are connected to a primary mixing zone, and the primary mixing zone communicates with one end of the petroleum coke powder concentrator , the downstream of the primary mixing area is a primary air channel, the secondary air turbine is set on the primary air channel, the petroleum coke powder concentrator is arranged in the primary air channel, and the secondary air channel, the secondary air channel communicates with the secondary wind turbine, the combustion cylinder has a thick petroleum coke powder channel, a light petroleum coke powder channel, a primary combustion chamber, and a secondary combustion chamber. The petroleum coke The other end of the powder concentrator communicates with one end of the thick petroleum coke powder passage and one end of the light petroleum coke powder passage respectively, the other end of the thick petroleum coke powder passage communicates with one end of the primary combustion chamber, and the light petroleum coke powder passage The other end communicates with the secondary combustion chamber, the other end of the primary combustion chamber communicates with the secondary combustion chamber, and the secondary combustion chamber is connected to the furnace with the secondary air passage.

The first-level combustion chamber and the second-level combustion chamber are respectively provided with a first-level ignition hole and a second-level ignition hole.

The thick petroleum coke powder channel and the light petroleum coke powder channel are cuboids, and the primary combustion chamber and secondary combustion chamber are cylindrical.

The section of the secondary air channel is a ring.

Compared with prior art, the beneficial effect of the present invention is:

The present invention utilizes the primary wind turbine to send primary air to enhance disturbance and promote the mixing of primary air and petroleum coke powder; at the same time, the secondary wind turbine is used to send secondary air to form a rotating jet to entrain high-temperature smoke gas, so that the petroleum coke powder is easy to catch fire; the present invention sets the petroleum coke powder concentrator on the primary air passage, and divides the primary petroleum coke powder airflow into two streams, thick and light, and the concentrated petroleum coke powder airflow contains petroleum coke There are more powders, which is beneficial to fire and promote combustion; in addition, the present invention adopts two-stage combustion technology, and the airflow of the concentrated petroleum coke powder is first burned in the first-stage combustion chamber, and then enters the second-stage combustion chamber and the The light petroleum coke powder airflow is burned together, which increases the space and time for petroleum coke powder airflow combustion, and because the two-stage combustion chambers are at relatively high temperatures, a wide range of high temperatures can effectively promote the complete combustion of petroleum coke powder particles; The petroleum coke powder burner in the present invention ignites petroleum coke powder particles, which can realize the ignition and combustion of petroleum coke better than existing burners, and the combustion process is more stable and fuel-efficient; therefore, the present invention has the advantages of flammability, energy saving, high efficiency, etc. advantage.

Description of drawings

Fig. 1 is a schematic structural view of a petroleum coke powder burner in a specific embodiment.

Detailed ways

The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings, but the implementation and protection scope of the present invention are not limited thereto.

As shown in Figure 1, this petroleum coke powder burner comprises feed pipe 1, primary wind turbine 2, secondary wind turbine 3, petroleum coke powder concentrator 5, combustion tube 14, and described feed pipe 1, primary wind turbine 2. The secondary wind turbine 3 and the combustion tube 14 are arranged coaxially in sequence. The primary wind turbine 2 and the secondary wind turbine 3 respectively form a rotating jet feeding system for the primary wind and the secondary wind. The primary wind turbine 2 is set On the feed pipe 1, the primary wind turbine 2 and the outlet of the feed pipe 1 are connected to a primary mixing zone 4 for primary mixing of petroleum coke powder particles and air, and the downstream of the primary mixing zone 4 is Primary air channel 13, the secondary wind turbine 3 is sleeved on the primary air channel 13, the petroleum coke powder concentrator 5 is arranged on the primary air channel 13, and the combustion tube 14 at the right end of the primary air channel 13 is covered with Secondary air channel 10, the secondary air channel 10 communicates with the secondary wind turbine 3, the section is a ring, the combustion tube 14 has a thick petroleum coke powder channel 6, a light petroleum coke powder channel 9, The primary combustion chamber 7 and the secondary combustion chamber 11, the thick petroleum coke powder passage 6 and the light petroleum coke powder passage 9 are cuboids, the primary combustion chamber 7 and the secondary combustion chamber 11 are cylindrical, and the petroleum coke powder passage 9 is a rectangular parallelepiped. The coke powder concentrator 5 communicates with the thick petroleum coke powder passage 6 and the light petroleum coke powder passage 9, and the thick petroleum coke powder passage 6 and the light petroleum coke powder passage 9 lead to the primary combustion chamber 7 and the secondary combustion chamber respectively. The combustion chamber 11, the primary combustion chamber 7 communicates with the secondary combustion chamber 11, and is respectively provided with a primary ignition hole 8, a secondary ignition hole 12, and the secondary combustion chamber 11 is connected to the secondary air passage 10 connected to the furnace.

The working principle of the petroleum coke powder burner is as follows: petroleum coke powder particles are sprayed into the primary mixing zone 4 from the feed pipe 1, and the air passes through the primary wind turbine 2 to form a primary wind rotating jet and is also injected into the primary Mixing zone 4, because the primary wind is a swirling air flow, the two are more fully mixed in the primary mixing zone 4 to form a primary petroleum coke powder airflow; the primary petroleum coke powder airflow enters the petroleum coke powder concentrator 5 , is divided into thick and thin two streams, wherein the concentrated petroleum coke powder airflow enters the first-stage combustion chamber 7 through the concentrated petroleum coke powder passage 6, because the petroleum coke content in the concentrated petroleum coke powder airflow is higher, in the first stage The high-temperature flame in the ignition hole 8 is easily ignited and burned, and enters the secondary combustion chamber 11 under preliminary combustion, and the light petroleum coke powder airflow enters the secondary combustion chamber 11 through the light petroleum coke powder passage 9, and The high-temperature concentrated petroleum coke powder airflow in the combustion is mixed, and further ignites and burns under the high-temperature flame ignition of the secondary ignition hole 12. Under the high temperature of the two-stage combustion chamber, the petroleum coke powder airflow is guaranteed to have a longer time and a larger range. The electrical fire process ensures the smooth ignition and combustion of the petroleum coke powder airflow; then the ignited petroleum coke powder airflow enters the furnace, and the secondary wind rotating jet formed by the secondary wind turbine 3 is also injected into the furnace, and the rotating airflow The tangential partial velocity can sweep the surrounding high-temperature flue gas, increase the temperature of the petroleum coke powder airflow, and maintain a high enough temperature for the petroleum coke powder airflow to burn more stably.

The invention can be widely used in the field of fuel combustion equipment.

Claims (3)

1. petroleum coke power combustor, it is characterized in that comprising feed pipe (1), a wind eddies wheel (2), secondary wind eddies wheel (3), petroleum coke powder inspissator (5), combustion barrel (14), described feed pipe (1), a wind eddies wheel (2), secondary wind eddies wheel (3), combustion barrel (14) is arranged in co-axial alignment successively, described wind eddies wheel (2) is sleeved on the described feed pipe (1), described wind eddies wheel (2) is connected to mixed once district (4) with the outlet of described feed pipe (1), mixed once district (4) is communicated with an end of described petroleum coke powder inspissator (5), downstream, described mixed once district (4) is a wind passage (13), described secondary wind eddies wheel (3) is sleeved on the described wind passage (13), be provided with described petroleum coke powder inspissator (5) in the described wind passage (13), the outer secondary air channel (10) that is with of combustion barrel (14), described secondary air channel (10) is taken turns (3) with described secondary wind eddies and is connected, dense petroleum coke powder passage (6) is arranged in the described combustion barrel (14), light petroleum coke powder passage (9), one-level combustion chamber (7), secondary combustion chamber (11), the other end of described petroleum coke powder inspissator (5) respectively with an end of described dense petroleum coke powder passage (6), one end of light petroleum coke powder passage (9) is communicated with, the other end of dense petroleum coke powder passage (6) is communicated with an end of one-level combustion chamber (7), the other end of light petroleum coke powder passage (9) is communicated with secondary combustion chamber (11), the other end of described one-level combustion chamber (7) communicates with described secondary combustion chamber (11), and described secondary combustion chamber (11) connects to burner hearth with described secondary air channel (10); Be respectively equipped with one-level fire hole (8), secondary points fire hole (12) in described one-level combustion chamber (7), the secondary combustion chamber (11).

2. petroleum coke power combustor according to claim 1 is characterized in that: described dense petroleum coke powder passage (6), light petroleum coke powder passage (9) are cuboid, and described one-level combustion chamber (7), secondary combustion chamber (11) are cylindrical.

3. petroleum coke power combustor according to claim 2 is characterized in that: described secondary air channel (10) section is an annulus.

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