Heat exchanger for carbon black reaction furnace and carbon black production device
By designing a heat exchanger including solid medium channels and flue gas channels in a carbon black reactor, the carbon black generation reaction and drying are terminated by physical contact heat exchange, the problems of large amount of quenched water and high energy consumption are solved, and the problem of high quenched water consumption is achieved The effect of reducing energy consumption and equipment load.
Patent Information
- Application Number
- CN202420271115.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-04
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-02-04
AI Technical Summary
In furnace carbon black production, the prior art requires a large amount of quenched water for quenching, resulting in waste of energy and adversely affecting subsequent equipment load, corrosion and exhaust combustion. At the same time, the carbon black after wet granulation requires additional heat energy to dry, resulting in waste of energy.
A heat exchanger for carbon black reactor is designed, including solid medium channels and flue gas channels. By physically contacting and exchanging heat in the heat exchange section of wet carbon black particles and carbon black generation reaction gas flow, the carbon black generation is achieved to terminate carbon black generation. Reaction and drying of wet carbon black particles.
The use of quenched water is reduced, the production load and corrosion of subsequent equipment is reduced, the exhaust gas for drying is saved, and the adverse effects of exhaust combustion is avoided, thereby reducing the overall energy consumption of carbon black production.
Smart Images
Figure CN222460392U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of furnace-process carbon black production devices, in particular to a heat exchanger for a carbon black reaction furnace and a carbon black production device. Background Art
[0002] In the furnace carbon black production, the raw materials are cracked at high temperature in the reaction furnace to generate carbon black. In order to control the quality and process indicators of carbon black, rapid cooling is required to terminate the carbon black generation reaction. Figure 3 At present, the known and adopted methods on the production line are to terminate the carbon black reaction by spraying a large amount of quenching water, rapidly vaporizing and absorbing heat. Depending on the type of carbon black produced, it is usually quenched from about 1800°C to 1100°C, and quenching water needs to be sprayed at different positions of the quenching section of the reactor, which is bound to cause energy waste. Generally, in carbon black production, water vapor accounts for more than 40% of the flue gas after one quenching, which has an adverse effect on the load, corrosion and combustion of exhaust gas of subsequent equipment; on the other hand, the wet particle carbon black containing 50% water after wet granulation of carbon black needs to be dried in a carbon black dryer, and this part of drying is achieved by the heat energy provided by the residual gas burned in the exhaust combustion furnace, and the exhaust gas consumption is large. Utility Model Content
[0003] In order to solve the above-mentioned problems in the prior art, the utility model provides a heat exchanger for a carbon black reactor and a carbon black production device which reduce the use of quenching water, reduce the production load of subsequent equipment, save exhaust gas for drying, and have low comprehensive energy consumption.
[0004] In order to achieve the above-mentioned utility model object, the utility model provides a heat exchanger for a carbon black reactor, comprising a heat exchange section, wherein the heat exchange section comprises a solid medium channel and a flue gas channel, wherein:
[0005] The carbon black particles are transported along the solid medium channel and are converted from wet carbon black particles to dry carbon black particles;
[0006] The carbon black generating reaction gas flow enters the solid medium channel from the input end of the flue gas channel and comes into physical contact with the carbon black particles, forming carbon black-containing flue gas which is output from the output end of the flue gas channel.
[0007] Furthermore, the heat exchange section is configured as a fluidized bed heat exchanger.
[0008] Furthermore, a feed port is provided at the top of the heat exchange section and a discharge port is provided at the bottom, a plurality of support plates are arranged between the feed port and the discharge port, and the feed port and the discharge port are connected in an S shape outside the plurality of support plates to form the solid medium channel.
[0009] Furthermore, the portion of the support plate located in the heat exchange section is provided with a smoke cavity, and a plurality of smoke holes are provided on the cavity wall of the smoke cavity, the smoke cavity is connected to the smoke inlet, and a smoke outlet is provided on the top of the heat exchange section.
[0010] Furthermore, portions of a plurality of the support plates within the heat exchange section are staggeredly arranged in a comb-teeth shape.
[0011] Furthermore, the number of the flue gas inlets is set to two, which are respectively located on the opposite side walls of the heat exchange section.
[0012] Furthermore, the smoke holes are opened on the top wall of the smoke cavity.
[0013] Furthermore, the top surface of the support plate located at the bottom is configured as the bottom wall of the heat exchange section.
[0014] Furthermore, the inner end of the smoke outlet is cylindrical and penetrates through the plurality of support plates located at the upper portion.
[0015] A carbon black production device including the heat exchanger for the carbon black reaction furnace includes a reaction furnace and a granulation system, wherein:
[0016] The reactor comprises a reaction section and a heat exchange section, wherein the reaction section forms a carbon black generating reaction gas flow and outputs the gas flow to the heat exchange section, and the heat exchange section acts on the carbon black generating reaction gas flow to terminate the carbon black generating reaction and output the carbon black containing flue gas;
[0017] The granulation system acts on the carbon black in the carbon black-containing flue gas to form wet carbon black particles and outputs them to the heat exchange section. The wet carbon black particles are in physical contact with the carbon black generation reaction gas flow and dry carbon black particles are output.
[0018] Furthermore, a collection system is arranged between the reaction furnace and the granulation system, and the collection system is used to filter the carbon black-containing flue gas to form the carbon black and by-product tail gas.
[0019] The beneficial effects of the utility model are as follows: the utility model physically contacts and exchanges heat between wet carbon black particles and the carbon black generation reaction airflow in the heat exchange section, while terminating the carbon black generation reaction and drying the wet carbon black particles, reducing the amount of quenching water used, reducing the production load and corrosion of subsequent equipment, and saving exhaust gas for drying, avoiding the adverse effects of exhaust gas combustion, thereby reducing the comprehensive energy consumption of carbon black production. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural schematic diagram of the heat exchange section in the utility model;
[0021] Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure at center A;
[0022] Figure 3 This is a schematic diagram of the carbon black production process of the utility model;
[0023] Figure 4 It is a schematic diagram of the production process flow in the prior art.
[0024] Among them, the accompanying drawings are marked as: 1, heat exchange section; 11, feed port; 12, discharge port; 13, flue gas inlet; 14, support plate; 141, flue gas cavity; 142, flue gas hole; 15, flue gas outlet; 151, exhaust hole; 2-1, reactor; 2-1-1, combustion section; 2-1-2, reaction section; 2-1-3, rapid cooling section; 2-1-4, stay section; 2-2, air preheater; 3-1, collection system; 4-1, granulation system; 4-2, drying system; 5-1, packaging system. DETAILED DESCRIPTION
[0025] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.
[0026] The present invention provides a heat exchanger for a carbon black reactor, comprising a heat exchange section 1, wherein the heat exchange section 1 comprises a solid medium channel and a flue gas channel, wherein:
[0027] The carbon black particles are transported along the solid medium channel and are converted from wet carbon black particles to dry carbon black particles;
[0028] The carbon black generating reaction airflow enters the solid medium channel from the input end of the flue gas channel and comes into physical contact with the carbon black particles, forming carbon black-containing flue gas which is output from the output end of the flue gas channel.
[0029] Those skilled in the art will understand that the raw materials are cracked and react continuously at high temperature in the reaction section 2-1-2 of the reactor 2-1, and the temperature is as high as 1800°C, that is, a carbon black generating reaction gas flow is formed. In the prior art, the carbon black generating reaction gas flow is heat exchanged with the injected quenching water in the quenching section 2-1-3 to achieve the purpose of terminating the carbon black generating reaction. The temperature of the carbon black-containing flue gas formed after the quenching is about 1100°C, resulting in energy waste and adverse effects on subsequent equipment and reactions. At the same time, the carbon black in the carbon black-containing flue gas is wet granulated in the granulation system 4-1. Since the water content of the formed wet carbon black particles reaches 50%, additional heat energy is required for drying. Even if exhaust gas is used for drying, it will cause further waste of energy.
[0030] In this embodiment, the wet carbon black particles and the carbon black generation reaction gas flow are subjected to physical contact heat exchange in the heat exchange section 1, and the carbon black generation reaction is terminated and the wet carbon black particles are dried, thereby reducing the amount of quenching water used, reducing the production load and corrosion of subsequent equipment, and saving the exhaust gas used for drying, avoiding the adverse effects of exhaust gas combustion, thereby reducing the comprehensive energy consumption of carbon black production.
[0031] In one of the preferred embodiments, the heat exchange section 1 can use a fluidized bed heat exchanger, preferably a double-inlet and double-outlet fluidized bed heat exchanger, wherein wet carbon black particles enter the fluidized bed heat exchanger through the feed airtight valve of the fluidized bed heat exchanger, and the dry carbon black particles formed after treatment are output through the discharge airtight valve of the fluidized bed heat exchanger, and the carbon black generating reaction gas flow enters the fluidized bed heat exchanger through the high-temperature flue gas inlet of the fluidized bed heat exchanger, and the carbon black-containing flue gas formed after treatment is output through the flue gas outlet of the fluidized bed heat exchanger. The fluidized bed heat exchanger is a prior art and will not be described in detail here.
[0032] In one preferred embodiment, a feed inlet 11 is provided at the top of the heat exchange section 1, and a discharge inlet 12 is provided at the bottom. A plurality of support plates 14 are arranged between the feed inlet 11 and the discharge inlet 12. The feed inlet 11 and the discharge inlet 12 are connected in an S-shape outside the plurality of support plates 14 to form a solid medium channel. Figure 1 A plurality of support plates 14 separate the inner cavity of the heat exchange section 1 to form an S-shaped solid medium channel. The S-shaped solid medium channel can ensure that the wet carbon black particles are in full contact with the carbon black generation reaction gas flow in the heat exchange section 1, thereby ensuring the heat exchange effect. The wet carbon black particles flow from the feed port 11 at the top of the heat exchange section 1 along the S-shaped solid medium channel to the discharge port 12 at the bottom. The top surface of the support plate 14 is horizontal or slightly inclined. During the process, the wet carbon black particles flow along the inclined surface from high to low, or when the top surface of the support plate 14 is horizontal, the wet carbon black particles that enter later push the wet carbon black particles that enter earlier to move. There is no need to add an additional structure to drive the movement of the carbon black particles, which simplifies the internal structure of the heat exchange section 1 and has a reasonable layout.
[0033] In one of the preferred embodiments, the portion of the support plate 14 located in the heat exchange section 1 is provided with a smoke cavity 141, and a plurality of smoke holes 142 are provided through the cavity wall of the smoke cavity 141, the aperture of the smoke hole 142 is smaller than the particle size of the dry carbon black particles, the smoke cavity 141 is connected to the smoke inlet 13, and a smoke outlet 15 is provided at the top of the heat exchange section 1.
[0034] The carbon black generating reaction airflow generated by the reaction section 2-1-2 enters the smoke chamber 141 through the smoke inlet 13, and diffuses into the heat exchange section 1 through the smoke holes 142 for physical contact and heat exchange with the carbon black particles in the solid medium channel. Since the support plates 14 are arranged at intervals, the carbon black generating reaction airflow can be evenly distributed in the heat exchange section 1, ensuring uniform contact between the carbon black generating reaction airflow and the carbon black particles.
[0035] In one preferred embodiment, a plurality of support plates 14 are arranged in a comb-tooth-like manner in a staggered manner in the heat exchange section 1, and the number of the smoke inlet 13 is set to two, which are respectively located on the opposite side walls of the heat exchange section 1, see Figure 1 , from the perspective of the figure, the front and rear ends of the support plate 14 are respectively sealed and connected to the side wall of the heat exchange section 1, and only one end of the left and right ends of the support plate 14 is sealed and connected to the side wall of the heat exchange section 1, and a gap is left between the other end and the side wall of the heat exchange section 1. The structure is simple, and the space in the heat exchange section 1 can be fully utilized to form an S-shaped solid medium channel. Preferably, the feed port 11 is located at the end of the gap away from the top support plate 14; similarly, Figure 1 From a middle perspective, two smoke inlets 13 are respectively located on the left and right side walls of the heat exchange section 1; a smoke cavity 141 of a support plate 14 sealed with the left side wall passes through the left side wall of the heat exchange section 1 and is communicated with the corresponding smoke inlets 13; a smoke cavity 141 of a support plate 14 sealed with the right side wall passes through the right side wall of the heat exchange section 1 and is communicated with the corresponding smoke inlet 13.
[0036] In one preferred embodiment, see Figure 2 The smoke holes 142 are opened on the top wall of the smoke cavity 141. Those skilled in the art can understand that the carbon black particles flow on the top surface of the support plate 14. The smoke holes 142 are opened on the top wall of the smoke cavity 141, that is, when the carbon black generating reaction airflow diffuses out from the smoke cavity 141 through the smoke holes 142, it can directly and fully contact the carbon black particles located on the top surface of the support plate 14.
[0037] In one of the preferred embodiments, the top surface of the support plate 14 at the bottom is set as the bottom wall of the heat exchange section 1, and the discharge port 12 is set at the interval left between the bottom support plate 14 and the side wall of the heat exchange section 1, which can ensure that the carbon black particles have enough travel in the heat exchange section 1.
[0038] In one preferred embodiment, see Figure 1 The inner end of the smoke outlet 15 is cylindrical and penetrates several support plates 14 located at the upper part. The side wall of the cylinder is located between adjacent support plates 14, and the bottom of the cylinder is provided with smoke exhaust holes 151, so that the carbon black-containing smoke after heat exchange is discharged to the smoke outlet 15 nearby. Preferably, the bottom end of the cylinder is located between the two bottom support plates 14, that is, the smoke exhaust holes 151 are provided between two adjacent support plates 14 in the heat exchange section 1.
[0039] A carbon black production device including a heat exchanger for a carbon black reaction furnace includes a reaction furnace 2-1 and a granulation system 4-1, wherein:
[0040] The reaction furnace 2-1 includes a reaction section 2-1-2 and a heat exchange section 1. The reaction section 2-1-2 forms a carbon black generating reaction gas flow and outputs it to the heat exchange section 1. The heat exchange section 1 acts on the carbon black generating reaction gas flow to terminate the carbon black generating reaction and outputs carbon black-containing flue gas.
[0041] The granulation system 4-1 acts on the carbon black in the carbon black-containing flue gas to form wet carbon black particles and outputs them to the heat exchange section 1. The wet carbon black particles come into physical contact with the carbon black generating reaction airflow and output dry carbon black particles.
[0042] Those skilled in the art will appreciate that Figure 4 , the same as the prior art, the reactor 2-1 also includes a combustion section 2-1-1, so that the fuel and air are fully burned to reach the reaction temperature, and then enter the reaction section 2-1-2 to make the raw oil high-temperature cracking, forming carbon black to generate a reaction gas flow, which is different from the prior art. Figure 3 The carbon black generating reaction airflow is not quenched by spraying quenching water at multiple locations in the quenching section 2-2-3, but enters the heat exchange section 1 for physical contact and heat exchange with the wet carbon black particles from the granulation system 4-1 to terminate the carbon black generating reaction and output the carbon black-containing flue gas. Another difference from the prior art is that the wet carbon black particles do not need to be dried by the additional drying system 4-2, but are heat exchanged in the heat exchange section 1. The wet carbon black particles are dried into dry carbon black particles and output to the packaging system 5-1 for packaging, thus completing the production of finished carbon black. The carbon black production device in this embodiment can reduce the amount of quenching water used, reduce the production load and corrosion of subsequent equipment, and save the exhaust gas used for drying, avoid the adverse effects of exhaust gas combustion, and thus reduce the comprehensive energy consumption of carbon black production.
[0043] In one of the preferred embodiments, a collecting system 3-1 is arranged between the reactor 2-1 and the granulation system 4-1. The collecting system 3-1 is used to filter the carbon black-containing flue gas to form carbon black and by-product tail gas. Those skilled in the art can understand that, similar to the treatment of the quenching section 2-1-3, the carbon black-containing flue gas formed by the heat exchange section 1 stays in the residence section 2-1-4, and is affected by the airflow preheated by the air preheater 2-2. The carbon black-containing flue gas enters the collecting system 3-1, and can be filtered to form carbon black with higher purity. Preferably, the carbon black formed after filtration is powdered carbon black.
[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A heat exchanger for a carbon black reactor, comprising a heat exchange section (1), characterized in that: The heat exchange section (1) comprises a solid medium channel and a flue gas channel, wherein: The carbon black particles are transported along the solid medium channel and are converted from wet carbon black particles to dry carbon black particles; The carbon black generating reaction gas flow enters the solid medium channel from the input end of the flue gas channel and physically contacts with the carbon black particles, forming carbon black-containing flue gas which is output from the output end of the flue gas channel.
2. The heat exchanger for a carbon black reaction furnace according to claim 1, characterized in that: The heat exchange section (1) is configured as a fluidized bed heat exchanger.
3. The heat exchanger for a carbon black reaction furnace according to claim 1, characterized in that: The heat exchange section (1) has a feed inlet (11) at the top and a discharge inlet (12) at the bottom, a plurality of support plates (14) are arranged between the feed inlet (11) and the discharge inlet (12), and the feed inlet (11) and the discharge inlet (12) are connected in an S-shape outside the plurality of support plates (14) to form the solid medium channel.
4. The heat exchanger for a carbon black reaction furnace according to claim 3, characterized in that: The portion of the support plate (14) located in the heat exchange section (1) is provided with a smoke cavity (141), and a cavity wall of the smoke cavity (141) is provided with a plurality of smoke holes (142) that penetrate therethrough; the smoke cavity (141) is connected to a smoke inlet (13); and a smoke outlet (15) is provided at the top of the heat exchange section (1).
5. The heat exchanger for a carbon black reaction furnace according to claim 4, characterized in that: The portions of the plurality of support plates (14) within the heat exchange section (1) are arranged in an interlaced manner in a comb-teeth shape.
6. The heat exchanger for a carbon black reaction furnace according to claim 4, characterized in that: The number of the flue gas inlets (13) is set to two, which are respectively located on two opposite side walls of the heat exchange section (1).
7. The heat exchanger for a carbon black reaction furnace according to claim 4, characterized in that: The smoke hole (142) is opened on the top wall of the smoke cavity (141).
8. The heat exchanger for a carbon black reaction furnace according to claim 4, characterized in that: The inner end of the smoke outlet (15) is cylindrical and penetrates through the plurality of support plates (14) located at the upper portion.
9. A carbon black production device comprising the heat exchanger for a carbon black reaction furnace according to any one of claims 1 to 8, comprising a reaction furnace (2-1) and a granulation system (4-1), characterized in that: The reaction furnace (2-1) comprises a reaction section (2-1-2) and a heat exchange section (1), wherein the reaction section (2-1-2) forms a carbon black generating reaction gas flow and outputs the gas flow to the heat exchange section (1), and the heat exchange section (1) acts on the carbon black generating reaction gas flow to terminate the carbon black generating reaction and output carbon black-containing flue gas; The granulation system (4-1) acts on the carbon black in the carbon black-containing flue gas to form wet carbon black particles and outputs them to the heat exchange section (1); the wet carbon black particles come into physical contact with the carbon black generating reaction gas flow and output dry carbon black particles.
10. The carbon black production device according to claim 9, characterized in that A collecting system (3-1) is arranged between the reaction furnace (2-1) and the granulation system (4-1), and the collecting system (3-1) is used to filter the carbon black-containing flue gas to form the carbon black and by-product tail gas.