Soft reaction furnace device for producing product carbon black

Abstract

The utility model discloses a soft reaction furnace device for producing carbon black products, which comprises a reaction furnace body, the reaction furnace body is of a transverse cylindrical shell structure, a raw oil inlet is arranged at one end of the reaction furnace body, and a raw oil outlet is arranged at the other end of the reaction furnace body. A flue gas pipeline communicated with the interior of the reaction furnace body is arranged on the side wall of one end, close to the raw oil inlet, of the reaction furnace body; the reaction furnace body comprises a reaction section and a condensation section; the raw oil inlet is formed in one end of the reaction section, the other end of the reaction section is communicated with the condensation section, and the inner diameter of the condensation section is smaller than that of the reaction section; the inner wall of one end, close to the condensation section, of the reaction section is provided with a conical reducing structure and is communicated with the interior of one end of the condensation section through the conical reducing structure; a throttling ring is arranged on the inner wall of the condensation section, the throttling ring is tubular, and the throttling ring and the condensation section are coaxially arranged; the flue gas pipeline is communicated with the side wall of the reaction section; one end, close to the reaction section, of the flue gas pipeline is inclined towards the condensation section.

Description

Technical Field

[0001] The utility model relates to the field of carbon black production, in particular to a soft reaction furnace device for producing finished carbon black. Background Art

[0002] Carbon black is produced by using liquid or gaseous hydrocarbons as fuel. The high-temperature residual gas is completely burned in the combustion chamber of the reactor and transported to the reaction area through the flue gas duct, where it collides with the raw oil (a mixture of hydrocarbons or other organic substances with a high carbon content) injected through the raw oil inlet. A small part of the raw oil is incompletely burned to supplement the required heat, and most of the raw oil is cracked and condensed to produce carbon black.

[0003] Patent No. CN201821571698.2 discloses a 40,000 tons / year soft carbon black reactor for producing N774 carbon black. The reactor is provided with a multi-stage necking and reducing structure to increase the turbulence intensity of the gaseous material in the reactor, so as to increase the condensation structure strength of the carbon black product, thereby improving the performance of the carbon black product. However, it was found during use that after cracking, the crude oil is easily in contact with the inner wall of the reactor at the necking and reducing structure of the reactor, and eventually coke particles are formed and adhered to the inner wall of the reactor. After long-term production operations, more and more coke particles adhere to the inner wall of the reactor, affecting the normal production operation of carbon black, and it is necessary to improve it. Summary of the invention

[0004] The utility model aims to solve the above problems and provide a soft reactor device for producing finished carbon black, which reduces the risk of coking on the inner wall of the reactor.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A soft reactor device for producing finished carbon black comprises a reactor body, which is a horizontal cylindrical shell structure, a raw oil inlet is arranged at one end of the reactor body, and a flue gas duct connected to the inside of the reactor body is arranged on the side wall of the reactor body close to the raw oil inlet; the reactor body comprises a reaction section and a coagulation section; the raw oil inlet is arranged at one end of the reaction section, and the other end of the reaction section is connected to the coagulation section, and the inner diameter of the coagulation section is smaller than the inner diameter of the reaction section; a conical reducing structure is arranged on the inner wall of the end of the reaction section close to the coagulation section and is connected to the inside of one end of the coagulation section through the conical reducing structure; a throttling ring is arranged on the inner wall of the coagulation section, the throttling ring is tubular and is coaxially arranged with the coagulation section; the flue gas duct is connected to the side wall of the reaction section, and the end of the flue gas duct close to the reaction section is inclined toward the coagulation section.

[0007] Furthermore, there are two flue gas pipes, one of which is arranged at the rear side of the top of the reaction section, and the other is arranged at the front side of the bottom of the reaction section. The end of the flue gas pipe connected to the reaction section is tangent to the circumferential inner wall of the reaction section.

[0008] Furthermore, one end of the flue gas duct close to the reaction section is inclined 2° toward the condensation section.

[0009] Furthermore, the inner diameter of the reaction section is 1360 mm, and the inner diameter of the coagulation section is narrowed to 700 mm; the diameter change between the reaction section and the coagulation section is achieved by a conical diameter reduction structure.

[0010] Furthermore, the length of the throttling ring increases to 690 mm, and the inner diameter of the throttling ring narrows to 400 mm.

[0011] Furthermore, the reactor body is composed of an inner layer of refractory bricks, a middle layer of refractory materials, and an outer layer of refractory bricks arranged from the inside to the outside; the inner layer of refractory bricks is stacked on the inside of the reactor body, the middle layer of refractory materials is coated on the outside of the inner layer of refractory bricks, and the outer layer of refractory bricks is stacked on the outside of the middle layer of refractory materials.

[0012] Furthermore, a steam mechanism is provided in the condensation section and is located outside one end of the throttling ring close to the reaction section; the steam mechanism includes a confluence pipe and a bypass pipe; the confluence pipe is provided in an annular sealed tubular shape and is sleeved on the outer periphery of the condensation section, an air inlet is provided on the outer side of the confluence pipe and is connected to the steam pipe through the air inlet, a plurality of bypass pipes are provided on the inner side of the confluence pipe at equal intervals along the circumferential direction of the confluence pipe, one end of the plurality of bypass pipes is connected to the confluence pipe, and the other ends of the plurality of bypass pipes penetrate into the interior of the condensation section and are inclined in the clockwise or counterclockwise circumferential direction of the condensation section.

[0013] Compared with the prior art, the utility model has the following advantages and positive effects:

[0014] The utility model tilts the flue gas pipeline toward the condensation section, so that the high-temperature flue gas accelerates the dispersion and cracking of the crude oil, and makes the cracked crude oil move quickly toward the condensation section and condense in the condensation section, which shortens the reaction time of the crude oil in the reaction section and reduces the risk of contact between the cracked crude oil and the inner wall of the reaction section; and the utility model sets a conical diameter reduction structure at the connection position between the reaction section and the condensation section to reduce the blocking area of ​​the variable diameter structure on the cracked crude oil, and makes the conical surface of the inner wall of the conical diameter reduction structure reduce the risk of adhesion of the cracked crude oil, thereby effectively avoiding the adhesion of coke particles to the inner wall of the reactor, reducing the risk of coking on the inner wall of the reactor, and ensuring the normal progress of carbon black production operations;

[0015] On the other hand, in order to avoid the situation where the reaction time of the crude oil after cracking is shortened in the reaction section and the structure of the carbon black product is weakened, a throttling ring is set in the condensation section to increase the condensation time and enhance the structural strength of the carbon black product; this reduces the risk of coking on the inner wall of the reactor without affecting the production quality of the carbon black product, bringing convenience to the production operation of the carbon black product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a top view of the structure of the utility model;

[0018] Figure 2 for Figure 1 AA cross-sectional structure diagram;

[0019] Figure 3 for Figure 1 BB cross-sectional structure diagram

[0020] Figure 4 for Figure 1 CC cross-sectional structure diagram. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work, any modifications, equivalent replacements, improvements, etc., should be included in the protection scope of the utility model.

[0022] like Figures 1 to 4 As shown, this embodiment discloses a soft reactor device for producing finished carbon black, including a reactor body, wherein the reactor body is composed of an inner refractory brick 4, a middle refractory material 5, and an outer refractory brick 6 arranged from the inside to the outside; the inner refractory brick 4 is stacked on the inside of the reactor body, the middle refractory material 5 is coated on the outside of the inner refractory brick 4, and the outer refractory brick 6 is stacked on the outside of the middle refractory material 5;

[0023] The multi-layer refractory brick structure is used to replace the refractory castable structure in the existing structure, which has better erosion resistance and prolongs the service life of the reactor.

[0024] The reactor body is a horizontal cylindrical shell structure, and the reactor body is composed of a reaction section 1 and a condensation section 2;

[0025] A raw oil inlet 102 is provided at one end of the reaction section 1, and a flue gas duct 101 connected to the interior of the reactor body is provided on the side wall of the end close to the raw oil inlet 102; there are two flue gas ducts 101, one of which is arranged at the rear side of the top of the reaction section 1, and the other flue gas duct 101 is arranged at the front side of the bottom end of the reaction section 1, and the interior of the end of the flue gas duct 101 connected to the reaction section 1 is tangent to the circumferential inner wall of the reaction section 1, and the end of the flue gas duct 101 close to the reaction section 1 is inclined 2° toward the direction of the condensation section 2.

[0026] from Figure 3 It can be seen that after the air and fuel oil in the two flue gas ducts are mixed and burned, the high-temperature flue gas enters the reaction section in the same direction with tangential rotation to form a stable flame; it has a certain rotation cutting effect, so that the crude oil entering from the crude oil inlet can be quickly dispersed and cracked, thereby increasing the reaction rate of the crude oil; at the same time, by adjusting the air intake angle of the two flue gas ducts from the vertical axis to an angle of 2° toward the end of the reactor, the rotating fluid in the reactor has kinetic energy to move toward the condensation section, reducing the reaction time of the crude oil droplets in the reaction section, thereby reducing the risk of contact between the crude oil droplets and the inside of the reaction section.

[0027] The end of the reaction section 1 away from the crude oil inlet 102 is connected to the condensation section 2, and the inner diameter of the condensation section 2 is smaller than the inner diameter of the reaction section 1; the inner wall of the end of the reaction section 1 close to the condensation section 2 is provided with a conical diameter reduction structure 103;

[0028] The inner diameter of the reaction section 1 is 1360 mm, and the inner diameter of the condensation section 2 is narrowed to 700 mm; the diameter change between the reaction section 1 and the condensation section 2 is achieved by a conical diameter reduction structure 103 .

[0029] Adjusting the first-stage necking shape from a sudden change in the existing structure to a gradual change can reduce the fluid turbulence intensity at the first necking position in the reactor, thereby reducing the risk of coking when the crude oil droplets come into contact with the inner wall of the reactor at the first-stage diameter change of the reactor.

[0030] The inner wall of the condensation section 2 is provided with a throttling ring 201, which is in a tubular shape and fixedly sleeved in the condensation section 2 and is coaxially arranged with the condensation section 2; the length of the throttling ring 201 increases to 690 mm, and the inner diameter of the throttling ring 201 is narrowed to 400 mm.

[0031] In order to ensure the reaction intensity of carbon black and the necessary structural degree of the product, the inner diameter of the throttling ring is reduced and the necking length is increased at the secondary diameter change of the reactor. This can strengthen the agglomeration reaction intensity of the carbon black in this area, extend the reaction time of the carbon black in this area, increase the aggregation degree of the carbon black particles, and help increase the DBP of the carbon black product, thereby improving the structural degree of the carbon black.

[0032] A steam mechanism is provided in the condensation section 2 and is located outside one end of the throttling ring 201 close to the reaction section 1; the steam mechanism includes a conduit 3 and a bypass pipe 301; the conduit 3 is provided in an annular sealed tubular shape and is sleeved on the outer periphery of the condensation section 2, an air inlet 302 is provided on the outer side of the conduit 3 and is connected to the steam pipe through the air inlet 302, a plurality of bypass pipes 301 are provided at equal intervals on the inner side of the conduit 3 along the circumferential direction of the conduit 3, one end of the plurality of bypass pipes 301 is connected to the conduit 3, and the other ends of the plurality of bypass pipes 301 penetrate into the interior of the condensation section 2 and are inclined in the clockwise circumferential direction of the condensation section 2.

[0033] A steam mechanism is added before the secondary diameter reducing position, and high-temperature steam is input into the manifold through the steam pipe. The high-temperature steam enters the reactor through the bypass tube. The inclined structural design of the bypass tube can make the steam entering the reactor rotate in the same direction as the rotating fluid in the reactor, thereby enhancing the bypass velocity of the fluid in the condensation section and improving the aggregation strength of the carbon black particles. At the same time, the steam airflow can prevent the carbon black particles from adhering to the end wall of the throttling tube and reduce the coking risk of the reactor.

[0034] The utility model tilts the flue gas pipeline toward the condensation section, so that the high-temperature flue gas accelerates the dispersion and cracking of the crude oil, and makes the cracked crude oil move quickly toward the condensation section and condense in the condensation section, which shortens the reaction time of the crude oil in the reaction section and reduces the risk of contact between the cracked crude oil and the inner wall of the reaction section; and the utility model sets a conical diameter reduction structure at the connection position between the reaction section and the condensation section to reduce the blocking area of ​​the variable diameter structure on the cracked crude oil, and makes the conical surface of the inner wall of the conical diameter reduction structure reduce the risk of adhesion of the cracked crude oil, thereby effectively avoiding the adhesion of coke particles to the inner wall of the reactor, reducing the risk of coking on the inner wall of the reactor, and ensuring the normal progress of carbon black production operations;

[0035] On the other hand, in order to avoid the situation where the reaction time of the crude oil after cracking is shortened in the reaction section and the structure of the carbon black product is weakened, a throttling ring is set in the condensation section to increase the condensation time and enhance the structural strength of the carbon black product; this reduces the risk of coking on the inner wall of the reactor without affecting the production quality of the carbon black product, bringing convenience to the production operation of the carbon black product.

Claims

1. A soft reactor device for producing finished carbon black, comprising a reactor body, the reactor body being a horizontal cylindrical shell structure, one end of the reactor body being provided with a raw oil inlet, and a side wall of the reactor body near the raw oil inlet being provided with a flue gas duct connected to the interior of the reactor body; characterized in that: The reactor body comprises a reaction section and a condensation section; the crude oil inlet is arranged at one end of the reaction section, and the other end of the reaction section is connected with the condensation section, and the inner diameter of the condensation section is smaller than the inner diameter of the reaction section; the inner wall of the reaction section close to the condensation section is provided with a tapered reducing structure and is connected with the interior of one end of the condensation section through the tapered reducing structure; the inner wall of the condensation section is provided with a throttling ring, which is tubular and coaxially arranged with the condensation section; the flue gas duct is connected with the side wall of the reaction section and the end of the flue gas duct close to the reaction section is inclined toward the condensation section.

2. The soft reactor device for producing finished carbon black according to claim 1, characterized in that: There are two flue gas pipes, one of which is arranged at the rear side of the top of the reaction section, and the other is arranged at the front side of the bottom of the reaction section. The end of the flue gas pipe connected to the reaction section is tangent to the circumferential inner wall of the reaction section.

3. The soft reactor device for producing finished carbon black according to claim 1, characterized in that: One end of the flue gas duct close to the reaction section is inclined 2° toward the condensation section.

4. The soft reactor device for producing finished carbon black according to claim 1, characterized in that: The inner diameter of the reaction section is 1360 mm, and the inner diameter of the coagulation section is narrowed to 700 mm; the diameter change between the reaction section and the coagulation section is achieved by a conical diameter reduction structure.

5. The soft reactor device for producing finished carbon black according to claim 1, characterized in that: The length of the throttle ring increases to 690 mm, and the inner diameter of the throttle ring narrows to 400 mm.

6. The soft reactor device for producing finished carbon black according to claim 1, characterized in that: The reactor body is composed of inner refractory bricks, middle refractory materials and outer refractory bricks arranged from inside to outside; the inner refractory bricks are stacked on the inner side of the reactor body, the middle refractory materials are coated on the outer side of the inner refractory bricks, and the outer refractory bricks are stacked on the outer side of the middle refractory materials.

7. The soft reactor device for producing finished carbon black according to claim 1, characterized in that: A steam mechanism is arranged in the condensation section and is located outside one end of the throttling ring close to the reaction section; the steam mechanism includes a confluence pipe and a bypass pipe; the confluence pipe is arranged in an annular sealed tubular shape and is sleeved on the outer periphery of the condensation section, an air inlet is arranged on the outer side of the confluence pipe and is connected with the steam pipe through the air inlet, a plurality of bypass pipes are arranged at equal intervals on the inner side of the confluence pipe along the circumferential direction of the confluence pipe, one end of the plurality of bypass pipes is connected with the confluence pipe, and the other ends of the plurality of bypass pipes penetrate into the interior of the condensation section and are arranged to be inclined in the clockwise circumferential direction or the counterclockwise circumferential direction of the condensation section.

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