Carbon black reacting furnace combustion process device

Abstract

The utility model relates to the technical field of carbon black production equipment, in particular to a combustion process device of a carbon black reaction furnace, which comprises an air distributor, a coal gas distributor, a combustion section, a throat section and a reaction section. A plurality of gas diversion ports are formed in the inner sides of the air distributor and the gas distributor, an axial air deflector is arranged in the air distributor, an axial gas deflector is arranged on the gas distributor, the air deflector and the gas deflector are coaxially arranged, and the diameter of the gas deflector is smaller than that of the air deflector; the throat section is communicated with the rear end of the combustion section, the reaction section is communicated with the throat section, and a trumpet-shaped transition section is arranged at the front end of the reaction section; and two rows of raw oil inlets for radial injection are formed in the throat section. According to the combustion process device of the carbon black reacting furnace, coal gas and air in the hearth can be mixed more uniformly, combustion is more sufficient, and the yield and quality of carbon black can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon black production equipment, in particular to a carbon black reaction furnace combustion process device. Background Art

[0002] The carbon black reactor is the core equipment for carbon black production. The quality, yield, consumption of raw materials and fuel, and utilization rate of crude oil of carbon black are closely related to the structural design of the reactor, the condition of the gas flow, and the gas flow rate. In the oil furnace method of carbon black production, there are two reactions in the carbon black reactor. The combustion reaction of gaseous hydrocarbons (coal gas) is the first reaction in the production of carbon black; the thermal cracking reaction of crude oil is the second reaction in the production of carbon black. During the production process, the coal gas is injected into the combustion chamber axially or radially and combined with hot air to completely burn to generate high-temperature residual gas. The high-temperature residual gas provides heat energy for the cracking of crude oil to generate carbon black.

[0003] In the production process, if the reactor structure is not designed reasonably, it is easy to cause insufficient mixing of the ejected coal gas and hot air, resulting in poor combustion effect, leading to poor crude oil cracking reaction temperature, affecting the improvement of the product's intrinsic quality; and leading to an increase in excess oxygen in the combustion hot air flow, causing part of the crude oil to be burned as fuel during the cracking reaction, resulting in a decrease in the carbon black yield. Summary of the invention

[0004] The utility model aims to provide a carbon black reaction furnace combustion process device, so that the coal gas and air in the furnace are mixed more evenly, the combustion is more complete, more heat is provided to the raw oil reaction, the raw oil is cracked more completely, so as to improve the yield and quality of carbon black.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows.

[0006] A carbon black reactor combustion process device comprises an air distributor, a gas distributor, a combustion section, a throat section and a reaction section, wherein the air distributor and the gas distributor are sequentially arranged at the front end of the combustion section and are distributed in a stepped manner, the rear end of the combustion section is trumpet-shaped, and the diameter of the rear end of the combustion section is smaller than the diameter of the front end; an air inlet is arranged on the outside of the air distributor, a gas inlet is arranged on the outside of the gas distributor, a plurality of gas diversion ports are arranged on the inside of the air distributor and the gas distributor, an axial air deflector is arranged inside the air distributor, an axial gas deflector is arranged on the gas distributor, the air deflector and the gas deflector are arranged coaxially, and the diameter of the gas deflector is smaller than the diameter of the air deflector, the throat section is connected with the rear end of the combustion section, the reaction section is connected with the throat section, and a trumpet-shaped transition section is arranged at the front end of the reaction section, and the diameter of the rear end of the trumpet-shaped transition section is larger than the diameter of the front end; two rows of radially injected raw oil inlets are arranged on the throat section.

[0007] Furthermore, a plurality of gas inlets II are provided in the middle of the combustion section, which are at an angle of 45° to 50° with the axis.

[0008] Furthermore, an axially arranged gas spray gun is provided at the front end furnace door of the reaction furnace, and the gas spray gun passes through the air deflector and the gas deflector and extends into the combustion section.

[0009] Furthermore, the cone angle of the trumpet-shaped section at the rear end of the combustion section is 18°~20°.

[0010] Furthermore, the cone angle of the trumpet-shaped transition section is 30°~50°.

[0011] Furthermore, a guide port is left between the front ends of the air guide and the gas guide and the furnace body of the reaction furnace, and the rear ends of the air guide and the gas guide are closed and connected to the furnace body of the reaction furnace.

[0012] Beneficial effects of the utility model:

[0013] (1) An air distributor and a gas distributor are provided to evenly distribute the gas through the gas diversion port, and an air deflector and a gas deflector are built in to change the flow direction of the gas when it enters the reactor, so that the air and the gas are mixed and contacted evenly, and the combustion is more complete, thereby increasing the temperature of the combustion gas flow, promoting the complete cracking of the crude oil, and improving the yield and quality of carbon black.

[0014] (2) The uniform mixing of air and coal gas and their complete combustion can also reduce the probability of excess oxygen, prevent the crude oil from being burned as fuel, and improve the utilization rate of the crude oil.

[0015] (3) A trumpet-shaped transition section is provided at the front end of the reaction section, which can enhance the air flow velocity while ensuring the stability of the air flow and the quality of the carbon black generated after cracking.

[0016] (4) Adding a gas inlet II in the middle of the combustion section or adding an axial gas spray gun at the front end of the reactor can increase the temperature in the center of the reactor and increase the gas flow rate to ensure the cracking intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the carbon black reactor combustion process device in Example 1.

[0018] Figure 2 This is a schematic diagram of the structure of the carbon black reactor combustion process device in Example 2.

[0019] In the figure: 1-air distributor, 2-gas distributor, 3-air deflector, 4-gas deflector, 5-air inlet, 6-gas inlet, 7-gas inlet II, 8-combustion section, 9-throat section, 10-reaction section, 11-trumpet-shaped transition section, 12-raw oil inlet, 13-furnace door. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. In the following description, many specific details are set forth to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and therefore, the utility model is not limited to the limitations of the specific embodiments disclosed below.

[0021] Example 1

[0022] like Figure 1 A carbon black reactor combustion process device is shown, comprising an air distributor 1, a gas distributor 2, a combustion section 8, a throat section 9 and a reaction section 10, wherein the air distributor 1 and the gas distributor 2 are sequentially arranged at the front end of the combustion section 8 and are distributed in a stepped manner, the rear end of the combustion section 8 is trumpet-shaped, and the diameter of the rear end of the combustion section 8 is smaller than the diameter of the front end, and the cone angle of the trumpet-shaped section at the rear end of the combustion section 8 is 18°~20°. In this embodiment, the cone angle of the trumpet-shaped section at the rear end of the combustion section 8 is 18°; an air inlet 5 is arranged on the outside of the air distributor 1, and a gas inlet 6 is arranged on the outside of the gas distributor 2, at least five gas diversion ports are arranged on the inside of the air distributor 1 and the gas distributor 2, and the diameter of the gas diversion port is smaller than the diameter of the air inlet 5 and the gas inlet 6, and the air distributor 1 is arranged inside There is an axial air deflector 3, and the gas distributor 2 is provided with an axial gas deflector 4. The air deflector 3 is coaxially arranged with the gas deflector 4, and the diameter of the gas deflector 4 is smaller than the diameter of the air deflector 3. The throat section 9 is connected with the rear end of the combustion section 8, and the reaction section 10 is connected with the throat section 9. A trumpet-shaped transition section 11 is provided at the front end of the reaction section 10. The diameter of the rear end of the trumpet-shaped transition section 11 is larger than the diameter of the front end. The cone angle of the trumpet-shaped transition section 11 is 30°~50°. In this embodiment, the cone angle of the trumpet-shaped transition section 11 is 36°. The trumpet-shaped transition section 11 can enhance the flow velocity of the airflow while ensuring the stability of the airflow; two rows of radially injected raw oil inlets 12 are provided on the throat section 9, and each row of raw oil inlets 12 is evenly spaced and arranged around the reactor body.

[0023] Among them, a guide port is left between the front end of the air deflector 3 and the gas deflector 4 and the reactor body, and the rear end of the air deflector 3 and the gas deflector 4 is closed and connected to the reactor body, which can adjust the gas flow direction and make the gas mixing more uniform.

[0024] In this embodiment, six to eight gas inlets II7 are provided in the middle of the combustion section 8, which are at an angle of 45° to 50° to the axis. The gas inlets II7 are arranged around the reactor body, and the straight lines of all the gas inlets II7 converge on the axis of the reactor, thereby increasing the temperature of the center area of ​​the reactor and enhancing the gas flow rate, thereby maintaining the temperature of the high-temperature gas flow when it reaches the throat section 9 and the reaction section 10, thereby ensuring the cracking intensity.

[0025] Example 2

[0026] like Figure 2 As shown, the carbon black reactor combustion process device in this embodiment is based on the embodiment 1, but the gas inlet II7 in the middle of the combustion section 8 is cancelled, and an axially arranged gas spray gun is added at the front end furnace door 13 of the reactor, and the gas spray gun passes through the air deflector 3 and the gas deflector 4 and extends into the combustion section 8. The purpose of the axial gas spray gun is the same as that of the gas inlet II7 in the embodiment 1, which is to increase the temperature in the center area of ​​the reactor, increase the gas flow rate, and ensure the cracking intensity.

[0027] In this embodiment, a guide port can be further provided at the rear end of the air deflector 3 to enhance the air diversion effect, and the guide port provided at the rear end of the air deflector 3 is opposite to the guide port at the front end of the gas deflector 4, which can further enhance the mixing effect of air and gas and increase the combustion temperature.

[0028] During the reaction process, the preheated air enters the air distributor 1 from the air inlet 5, enters the air guide 3 after being diverted by the air distributor 1, and the coal gas enters the gas distributor 2 from the coal gas inlet 6, enters the coal gas guide 4 after being diverted by the coal gas distributor 2, and the air and the coal gas are fully mixed and burned in the combustion section 8 to form a high-temperature airflow, which provides heat energy for the crude oil cracking reaction; the crude oil is sprayed in from the throat section 9, contacts with the high-temperature airflow, and is cracked to generate carbon black.

Claims

1. A carbon black reactor combustion process device, comprising an air distributor, a gas distributor, a combustion section, a throat section and a reaction section, characterized in that: The air distributor and the gas distributor are arranged in sequence at the front end of the combustion section and are distributed in a stepped manner. The rear end of the combustion section is trumpet-shaped, and the diameter of the rear end of the combustion section is smaller than the diameter of the front end. An air inlet is arranged on the outside of the air distributor, and a gas inlet is arranged on the outside of the gas distributor. A plurality of gas diversion ports are arranged on the inside of the air distributor and the gas distributor. An axial air deflector is arranged in the air distributor, and an axial gas deflector is arranged in the gas distributor. The air deflector and the gas deflector are arranged coaxially, and the diameter of the gas deflector is smaller than the diameter of the air deflector. The throat section is connected with the rear end of the combustion section, and the reaction section is connected with the throat section. A trumpet-shaped transition section is arranged at the front end of the reaction section, and the diameter of the rear end of the trumpet-shaped transition section is larger than the diameter of the front end. Two rows of radially injected raw oil inlets are arranged on the throat section.

2. The carbon black reaction furnace combustion process device according to claim 1, characterized in that: The middle part of the combustion section is also provided with a plurality of gas inlets II which are at an angle of 45° to 50° with the axis.

3. The carbon black reaction furnace combustion process device according to claim 1, characterized in that: An axially arranged gas spray gun is provided at the front end furnace door of the reaction furnace, and the gas spray gun passes through the air deflector and the gas deflector and extends into the combustion section.

4. The carbon black reaction furnace combustion process device according to claim 1, characterized in that: The cone angle of the trumpet-shaped section at the rear end of the combustion section is 18° to 20°.

5. The carbon black reaction furnace combustion process device according to claim 1, characterized in that: The cone angle of the trumpet-shaped transition section is 30° to 50°.

6. The carbon black reaction furnace combustion process device according to claim 1, characterized in that: A guide port is left between the front end of the air guide and the gas guide and the furnace body of the reaction furnace, and the rear end of the air guide and the gas guide are closed and connected to the furnace body of the reaction furnace.

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