CN216890747U - Carbon black flue gas waste heat recovery system and carbon black apparatus for producing - Google Patents
Carbon black flue gas waste heat recovery system and carbon black apparatus for producing Download PDFInfo
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- CN216890747U CN216890747U CN202220578571.3U CN202220578571U CN216890747U CN 216890747 U CN216890747 U CN 216890747U CN 202220578571 U CN202220578571 U CN 202220578571U CN 216890747 U CN216890747 U CN 216890747U
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Abstract
The utility model provides a carbon black flue gas waste heat recovery system and a carbon black production device, wherein the carbon black flue gas waste heat recovery system comprises an air preheater connected with a carbon black reaction furnace, and carbon black flue gas generated in the carbon black reaction furnace preheats air in the air preheater; the input end of the primary preheating recoverer is connected with the output end of the air preheater, and the primary preheating recoverer recovers the heat of the carbon black flue gas to generate first high-temperature steam; the raw oil primary preheater is connected to the high-temperature steam output end of the primary preheating recoverer; the input end of the raw oil secondary preheater is connected to the output end of the raw oil primary preheater, and the raw oil secondary preheater is connected to the carbon black flue gas output end of the primary preheating recoverer; and the input end of the secondary preheating recoverer is connected to the carbon black flue gas output end of the raw oil secondary preheater, and the secondary preheating recoverer is used for recovering heat in the carbon black flue gas and generating second high-temperature steam.
Description
Technical Field
The utility model belongs to the technical field of carbon black production in the chemical industry, and particularly relates to a carbon black flue gas waste heat recovery system and a carbon black production device.
Background
In the production process of the carbon black, the fuel and the air after the waste heat are mixed and combusted in the combustion section of the carbon black reaction furnace to generate high-temperature combustion airflow at 1927 ℃, and the raw oil is incompletely combusted in high-temperature flue gas to generate the carbon black. At the rear part of the carbon black reaction furnace, a large amount of quenching water is required to be sprayed into carbon black flue gas to stop the carbon black reaction. The temperature of the carbon black flue gas at the outlet of the carbon black reaction furnace is reduced to 950 ℃, and when the carbon black flue gas is collected by using a bag filter, the temperature of the carbon black flue gas needs to be reduced to below 280 ℃ so as to avoid damaging a filter bag device.
If provide a novel high temperature carbon black raw oil presets device among prior art CN203704727U, this technical scheme discloses that the carbon black flue gas that the carbon black reacting furnace produced utilizes preheating boiler to carry out waste heat recovery, transport to first-order raw oil preheater after exhaust-heat boiler and carbon black flue gas heat transfer, utilize the temperature of carbon black flue gas to carry out the waste heat for the first time to raw oil, later, carbon black flue gas is carried to second grade raw oil preheater, utilize the heat of the carbon black flue gas that first-order raw oil preheater transmitted to second grade raw oil preheater to carry out the secondary preheating to raw oil, make the temperature rise to 350 ℃, the raw oil after the heating is loopbacked to the carbon black reacting furnace.
In the prior art, the carbon black smoke after the heat is recovered by the waste heat boiler is used for continuously heating the raw oil for two times, and then the carbon black smoke is collected by a bag filter connected with a secondary raw oil preheater. However, the carbon black flue gas has a high temperature before entering the bag filter, and a large amount of quenching water is needed for cooling, so that heat waste is caused. On the other hand, the device is not applied to the device after sensible heat is recovered by a waste heat boiler in the carbon black production process.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a carbon black flue gas waste heat recovery system, which is used for preheating raw oil to the required temperature and recovering redundant energy to reuse carbon black in production or production and sale so as to improve the utilization rate of energy.
The utility model aims to provide a carbon black production device, which utilizes the carbon black flue gas waste heat recovery system to recover and reuse the heat of carbon black flue gas generated in a carbon black reaction furnace so as to reduce the production cost of carbon black.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a carbon black flue gas waste heat recovery system, includes:
the air preheater is connected with the carbon black reaction furnace, and carbon black flue gas generated in the carbon black reaction furnace preheats air in the air preheater;
the input end of the primary preheating recoverer is connected with the output end of the air preheater, and the primary preheating recoverer recovers the heat of the carbon black flue gas to generate first high-temperature steam;
the raw oil primary preheater is connected to the high-temperature steam output end of the primary preheating recoverer;
the input end of the raw oil secondary preheater is connected to the output end of the raw oil primary preheater, and the raw oil secondary preheater is connected to the carbon black flue gas output end of the primary preheating recoverer;
and the input end of the secondary preheating recoverer is connected to the carbon black flue gas output end of the raw oil secondary preheater, and the secondary preheating recoverer is used for recovering heat in the carbon black flue gas and generating second high-temperature steam.
Preferably, the system also comprises heat tracing pipes, a pipeline between the air preheater and the primary preheating recoverer, a pipeline between the primary preheating recoverer and the primary raw oil preheater for conveying first high-temperature steam, a pipeline between the primary preheating recoverer and the secondary raw oil preheater for conveying carbon black flue gas, a pipeline between the primary raw oil preheater and the secondary raw oil preheater for conveying raw oil, a pipeline connected between the secondary raw oil preheater and the secondary preheating recoverer, and a pipeline between the carbon black reaction furnace and the secondary raw oil preheater for conveying raw oil, wherein at least one pipeline in the pipelines is provided with the heat tracing pipes;
and part of the first high-temperature steam generated by the primary preheating recoverer and part of the second high-temperature steam generated by the secondary preheating recoverer supply heat for the heat tracing pipe.
Preferably, the system further comprises a throat pipe and a bag filter, wherein the input end of the throat pipe is connected to the carbon black flue gas output end of the secondary preheating recoverer, the output end of the throat pipe is connected to the input end of the bag filter, and the bag filter is configured to collect carbon black flue gas.
Preferably, the pressure range value of the air preheated by the air preheater is 0.6Kpa-0.8Kpa, and the flow range value is 24000Nm3/h-26000Nm3And h, the temperature range value of the carbon black flue gas at the output end of the air preheater is 680-750 ℃.
Preferably, the pressure range value of the first high-temperature steam at the high-temperature steam output end of the primary preheating recoverer is 2Mpa-2.2Mpa, the flow range value is 6000kg/h-7000kg/h, and the temperature range value is 200 ℃ -220 ℃;
the temperature range value of the carbon black flue gas output by the carbon black flue gas output end of the primary preheating recoverer is 450-520 ℃.
Preferably, the temperature range value of the raw oil heated by the raw oil primary preheater is 170-190 ℃, and the temperature range value of the raw oil heated by the raw oil secondary preheater is 290-310 ℃.
Preferably, the primary raw oil preheater and the secondary raw oil preheater are both horizontal tube-in-tube heat exchangers;
the outer side of a tube array of the raw oil primary preheater is provided with first high-temperature steam generated by the primary preheating recoverer, and the inner side of the tube array is provided with raw oil;
the outer side of a tube array of the raw oil secondary preheater is carbon black smoke after passing through the primary preheating recoverer, and the inner side of the tube array is raw oil.
Preferably, the temperature of the carbon black flue gas at the output end of the raw oil secondary preheater is 380-420 ℃.
Preferably, the steam pressure range of the second high-temperature steam output by the output end of the secondary preheating recoverer is 2.0-2.2 Mpa, the flow range is 1500-1800 kg/h, the temperature range is 200-220 ℃, and the carbon black flue gas temperature range of the output end of the secondary preheating recoverer is 230-270 ℃.
The utility model also provides a carbon black production device, which preferably comprises a carbon black reaction furnace and the carbon black flue gas waste heat recovery system, wherein the carbon black production device is configured to produce carbon black for hard rubber.
Compared with the prior art, the utility model has the following beneficial effects: according to the utility model, after carbon black flue gas generated after combustion of the carbon black reaction furnace passes through the air preheater, preheated air is returned to the combustion chamber of the carbon black reaction furnace, so that utilization of waste heat of the carbon black flue gas is realized, the recovery rate of carbon black heat is improved, the reaction condition of the carbon black is strengthened, and the heat value of tail gas is improved. Meanwhile, the fuel required for combustion in the carbon black reaction of the carbon black reaction furnace is reduced, and the cost is reduced.
The two-stage preheating recoverer is arranged, so that a sufficient heat source can be ensured to preheat raw oil by the raw oil secondary preheater, and meanwhile, the heat in the carbon black flue gas can be recovered and reused to the maximum extent, so that energy is saved, and meanwhile, the temperature of the carbon black flue gas after the two-stage preheating recoverer is not too high, so that a bag filter for collecting the carbon black flue gas is protected.
Drawings
FIG. 1 is a schematic view of the structure of a carbon black producing apparatus according to the present invention.
Wherein, 1, a carbon black reaction furnace; 2. an air preheater; 3. a main air supply fan; 4. a primary preheating recoverer; 5. a secondary preheating recoverer; 6. a primary preheater for raw oil; 7. a secondary preheater of raw oil; 8. a hot air pipe; 9. a throat pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In order to improve the recovery rate of the heat of the carbon black flue gas in the carbon black reaction and to preheat the raw oil to the required temperature, as shown in fig. 1, the carbon black production apparatus in this embodiment is mainly used for producing carbon black for hard rubber.
Above-mentioned carbon black apparatus for producing includes carbon black reacting furnace 1 to and carbon black flue gas waste heat recovery system, the carbon black flue gas output that carbon black reacting furnace 1 produced connects in carbon black flue gas waste heat recovery system's input, and the heat of carbon black flue gas is retrieved through carbon black flue gas waste heat recovery system, and is utilized by carbon black apparatus for producing once more.
Specifically, above-mentioned carbon black flue gas waste heat recovery system includes air heater 2, one-level preheating recoverer 4, raw oil one-level preheater 6, raw oil secondary preheater 7 and second grade preheating recoverer 5, and wherein, the input of air heater 2 is connected in the output of carbon black reacting furnace 1, and the carbon black flue gas that carbon black reacting furnace 1 produced is carried to air heater 2 through the pipeline between the two, and air heater 2 utilizes the carbon black flue gas that produces in the carbon black reacting furnace 1 to preheat the air. The input end of the primary preheating recoverer 4 is connected to the output end of the air preheater 2, and the primary preheating recoverer 4 recovers heat of carbon black flue gas to generate first high-temperature steam. The raw oil primary preheater 6 is connected to the high-temperature steam output end of the primary preheating recoverer 4, and primary preheating is carried out on the raw oil by utilizing the first high-temperature steam produced by the primary preheating recoverer 4. The input end of the raw oil secondary preheater 7 is connected to the output end of the raw oil primary preheater 6, and the raw oil secondary preheater 7 is connected to the carbon black flue gas output end of the primary preheating recoverer 4. The input end of the secondary preheating recoverer 5 is connected to the carbon black flue gas output end of the raw oil secondary preheater 7, and the secondary preheating recoverer 5 is used for recovering heat in the carbon black flue gas and generating second high-temperature steam.
In this embodiment, after the carbon black flue gas generated by the combustion of the carbon black reaction furnace 1 passes through the air preheater 2, the preheated air is returned to the combustion chamber of the carbon black reaction furnace 1, so that the utilization of the waste heat of the carbon black flue gas is realized, the improvement of the recovery rate of the carbon black heat and the strengthening of the carbon black reaction conditions are facilitated, and the heat value of the tail gas is improved. Meanwhile, the fuel required for combustion in the carbon black reaction of the carbon black reaction furnace 1 is reduced, and the cost is reduced.
The two-stage preheating recoverer is arranged, so that the raw oil secondary preheater 7 can be ensured to have a sufficient heat source to preheat raw oil, and meanwhile, the heat in the carbon black flue gas can be also ensured to be recycled to the maximum extent, so that energy is saved, and meanwhile, the temperature of the carbon black flue gas after the secondary preheating recoverer 5 is not too high, so that a bag filter for collecting the carbon black flue gas is protected.
Preferably, the air preheater 2 is a tubular countercurrent heat exchange device, and the heat exchange device of the type is one commonly used in carbon black reaction, so that the heat exchange efficiency of air can be increased, and the heat exchange effect is improved. The inner side of a tube array of the air heat exchanger is carbon black flue gas, the outer side of the tube array is air, the temperature range value of the carbon black flue gas conveyed to the inlet of the air preheater 2 by the carbon black reaction furnace 1 is 900-1000 ℃, the carbon black flue gas is conveyed between the carbon black reaction furnace 1 and the air preheater 2 through the hot air pipe 8, the air is preheated to 850-900 ℃ by the carbon black flue gas through the heat exchange of the tube array, the preheated air is conveyed back to a combustion chamber of the carbon black reaction furnace 1 through the hot air pipe 8, the utilization of the waste heat of the carbon black flue gas is realized, the carbon black yield is improved, the carbon black reaction condition is strengthened, and the tail gas heat value is improved. Preferably, the temperature of the carbon black flue gas entering the air heat exchanger 2 is 950 ℃, and the carbon black flue gas carries out heat exchange through the tubes to enable the air waste heat to reach 860 ℃.
The preheated air has a pressure range of 0.6Kpa to 0.8Kpa and a flow range of 24000Nm3/h-26000Nm3The temperature range value of the carbon black smoke at the output end of the air preheater 2 is 680-750 ℃. Preferably, the temperature of the carbon black flue gas at the outlet end of the air heat exchanger 2 is 700 ℃, and the air preheater 2 uses the main air supply fan 3 to supply air to the air preheater 2.
Preferably, the output end of the air preheater 2 is connected with the input end of the primary preheating recoverer 4 through a pipeline, and the carbon black flue gas is conveyed to the primary preheating recoverer 4 through the pipeline to recover heat. Specifically, the primary preheating recoverer 4 is a shell-and-tube heat exchanger, which is a heat exchanger commonly used in the carbon black industry, and the detailed structure of the shell-and-tube heat exchanger is not repeated herein, and the primary waste heat exchanger can also be a waste heat boiler.
The shell and tube heat exchanger has the advantages that water is arranged on the outer side of the shell and tube, carbon black flue gas is arranged on the inner side of the shell and tube, the water is boiled and vaporized in the shell pass cylinder, steam is generated by indirect heat exchange between the carbon black flue gas and the water and is used for recovering partial sensible heat of the carbon black flue gas, and the generated steam can be used by a production line, so that steam supply of a power generation boiler can be reduced, and the generated energy or steam sales can be increased.
The first high-temperature steam generated by the primary preheating recoverer 4 is used for primary preheating of the raw oil, the pressure range of the first high-temperature steam at the high-temperature steam output end of the primary preheating recoverer 4 is 2Mpa-2.2Mpa, the flow range is 6000kg/h-7000kg/h, and the temperature range is 200 ℃ -220 ℃. The temperature range value of the carbon black flue gas output by the carbon black flue gas output end of the primary preheating recoverer 4 is 450-520 ℃. The first high temperature steam that the one-level preheats recoverer 4 produced except that carrying out the one-level to raw oil and preheating, can also prevent that the pipeline temperature is low excessively to each pipeline among the carbon black flue gas waste heat recovery system in the working process, influences the mobility of the material of carrying in the pipeline, and in addition, the too much first high temperature steam of production can outwards be sold. Preferably, the temperature of the carbon black flue gas entering the input end of the primary waste heat recoverer 4 is 700 ℃, and the temperature of the carbon black flue gas output by the output end of the primary waste heat recoverer is 490 ℃.
The high-temperature steam output end of the primary preheating recoverer 4 is connected with a primary raw oil preheater 6 through a pipeline to perform primary preheating on raw oil, the primary raw oil preheater 6 is a horizontal tubular heat exchanger, high-pressure steam is arranged on the outer side of a tubular, raw oil is arranged on the inner side of the tubular, and the temperature range of the raw oil heated by the primary raw oil preheater 6 is 170-190 ℃. Preferably, the temperature of the input end of the raw oil primary preheater 6 is 120 ℃, and the temperature of the raw oil at the output end is 180 ℃.
The input end of the raw oil secondary preheater 7 is connected to the output end of the raw oil primary preheater 6, the raw oil passing through the raw oil primary preheater 6 is conveyed to the raw oil secondary preheater 7 for secondary preheating, the carbon black flue gas output from the output end of the primary preheating recoverer 4 is conveyed to the raw oil secondary preheater 7 through a pipeline, and the raw oil is secondarily preheated by the carbon black flue gas.
The raw oil secondary preheater 7 is a horizontal tubular heat exchanger, the outer side of a tubular of the horizontal tubular heat exchanger is carbon black flue gas, the inner side of the tubular is raw oil, the temperature range of the carbon black flue gas is 450-520 ℃, the temperature range of the raw oil reaches 290-310 ℃ after the carbon black flue gas secondarily preheats the raw oil through the raw oil secondary heat exchanger, the preheated raw oil is conveyed to the 9-section throat of the carbon black reaction furnace 1 through a pipeline, high-temperature combustion airflow is sprayed after the raw oil is atomized by an oil gun, and the raw oil is incompletely combusted in the high-temperature flue gas to generate the carbon black.
In the embodiment, coal tar is used as raw oil, the coal tar is a complex mixture of highly aromatic hydrocarbons, the coal tar sold in the market contains about 4% of water, and the preheating temperature is adjusted according to the difference of the components of the raw oil, namely the temperature range is 290-310 ℃. If the preheating temperature is too high, the gasification expansion volume of the water in the raw oil is too large, so that an air pocket is formed, the heat exchange efficiency of the secondary raw oil preheater is reduced, and the production quality of the carbon black is influenced. In addition, the coking of asphaltene in the raw oil can be caused, and the heat exchange tube of the raw oil preheater can be blocked.
The raw oil is preheated in the second stage and then conveyed to a carbon black reaction furnace 1, the inlet flow, the temperature, the pressure value and the like of the raw oil entering a throat 9 section of the carbon black reaction furnace 1 are all related to the capacity of carbon black, for example, a 60000 ton/year carbon black production line, the carbon black N330 for producing hard rubber has the flow of 10500Kg/h, the temperature of 300 ℃ and the pressure of 4 Mpa.
The temperature of the carbon black flue gas at the output end of the raw oil secondary preheater 7 is 380-420 ℃, the carbon black flue gas is conveyed to the secondary preheating recoverer 5, the secondary preheating recoverer 5 is a shell-and-tube heat exchanger, the outer side of a shell of the shell-and-tube heat exchanger is water, the inner side of the shell is carbon black flue gas, the water is boiled and vaporized in the shell barrel, second high-temperature steam is generated by indirect heat exchange between the carbon black flue gas and the water and is used for recovering part of the sensible heat of the flue gas of the carbon black flue gas, and the generated second high-temperature steam can be used for a production line, such as heat tracing, so that the steam supply of a generator boiler can be reduced, energy sources are saved, and the generated energy or steam sales are increased. Preferably, the temperature of the carbon black flue gas entering the raw oil secondary preheater 7 is 490 ℃, the temperature of the carbon black flue gas at the output end of the raw oil secondary preheater is 400 ℃, and the temperature of the raw oil reaches 300 ℃.
The carbon black flue gas passing through the raw oil secondary pre-setting device 7 enters a secondary pre-heating recoverer 5, the temperature range of the carbon black flue gas at the input end of the secondary pre-heating recoverer 5 is 380-420 ℃, the steam pressure range of second high-temperature steam output by the output end of the secondary pre-heating recoverer 5 is 2.0-2.2 Mpa, the flow range is 1500-1800 kg/h, the temperature range is 200-220 ℃, and the temperature range of the carbon black flue gas at the output end of the secondary pre-heating recoverer 5 is 230-270 ℃. Preferably, the temperature of the soot flue gas at the input of the secondary preheater recoverer 5 is 250 ℃.
The carbon black flue gas passes through the secondary preheating recoverer 5 and then is sequentially connected with the throat pipe 9 and the bag filter, and after the carbon black flue gas is quenched and cooled by the throat pipe 9, the temperature of the carbon black flue gas is reduced to below 280 ℃, and then the carbon black flue gas enters the bag filter to prevent the bag filter from being damaged.
If only the primary preheating recoverer 4 is arranged and the factor of the highest temperature which can be borne by the bag filter is considered, the temperature of the carbon black flue gas after passing through the primary preheating recoverer 4 is required to be reduced to 320-345 ℃, and the carbon black flue gas can be cooled to the temperature which can be borne by the bag filter after passing through the raw material secondary preheater 7, but the heat source of the raw material oil secondary preheater 7 is insufficient, and the raw material oil cannot be preheated to the temperature required by the process. Therefore, in the embodiment, a two-stage preheating recoverer is arranged, the one-stage preheating recoverer 4 recovers part of sensible heat of carbon black flue gas, the temperature of outlet flue gas ranges from 450 ℃ to 520 ℃, and a raw oil secondary preheater 7 is arranged after raw oil is preheated by first high-temperature steam, so that the raw oil is fully preheated. In this embodiment, the ratio of the recovered heat of the air preheater 2 is 35% to 40%, the ratio of the recovered heat of the preheating recoverer is 30% to 38%, the ratio of the recovered heat of the raw oil secondary preheater 7 is 5% to 8%, and the ratio of the recovered heat of the secondary preheating recoverer 5 is 5% to 8%.
In this embodiment, at least one of the pipelines is provided with a heat tracing pipe, and the pipeline is used for conveying first high temperature steam between the air preheater 2 and the primary preheating recoverer 4, and the pipeline is used for conveying carbon black flue gas between the primary afterheat recoverer 4 and the raw oil primary preheater 6, and the pipeline is used for conveying raw oil between the raw oil primary preheater 6 and the raw oil secondary preheater 7, and the pipeline is used for connecting the raw oil secondary preheater 7 and the secondary preheating recoverer 5, and the pipeline is used for conveying raw oil between the carbon black reaction furnace 1 and the raw oil secondary preheater 7.
In this embodiment, preferably, the pipelines are all provided with heat tracing pipes, and part of the first high-temperature steam generated by the primary preheating recoverer 4 and part or all of the second high-temperature steam generated by the secondary preheating recoverer 5 supply heat to the heat tracing pipes, so as to ensure the fluidity of the substances conveyed in the pipelines.
Besides the above pipelines, the other pipelines of the carbon black flue gas waste heat recovery system in this embodiment are also provided with heat tracing pipes, and the heat tracing pipes are required to be arranged in cold environments like the pipelines between the main air supply fan 3 and the air preheater 2.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a carbon black flue gas waste heat recovery system which characterized in that includes:
the air preheater (2) is connected to the carbon black reaction furnace (1), and carbon black flue gas generated in the carbon black reaction furnace (1) preheats air in the air preheater (2);
the input end of the primary preheating recoverer (4) is connected to the output end of the air preheater (2), and the primary preheating recoverer (4) recovers the heat of the carbon black flue gas to generate first high-temperature steam;
the raw oil primary preheater (6) is connected to the high-temperature steam output end of the primary preheating recoverer (4);
the input end of the raw oil secondary preheater (7) is connected to the output end of the raw oil primary preheater (6), and the raw oil secondary preheater (7) is connected to the carbon black flue gas output end of the primary preheating recoverer (4);
and the input end of the secondary preheating recoverer (5) is connected to the carbon black flue gas output end of the raw oil secondary preheater (7), and the secondary preheating recoverer (5) is used for recovering heat in the carbon black flue gas and generating second high-temperature steam.
2. The carbon black flue gas waste heat recovery system of claim 1, further comprising a heat tracing pipe, a pipeline between the air preheater (2) and the primary preheating recoverer (4), a pipeline between the primary preheating recoverer (4) and the raw oil primary preheater (6) for conveying first high-temperature steam, a pipeline between the primary preheating recoverer (4) and the raw oil secondary preheater (7) for conveying carbon black flue gas, a pipeline between the raw oil primary preheater (6) and the raw oil secondary preheater (7) for conveying raw oil, and a pipeline connected between the raw oil secondary preheater (7) and the secondary preheating recoverer (5), and pipelines for conveying raw oil between the carbon black reaction furnace (1) and the raw oil secondary preheater (7), wherein at least one pipeline in the pipelines is provided with a heat tracing pipe;
and part of the first high-temperature steam generated by the primary preheating recoverer (4) and part of the second high-temperature steam generated by the secondary preheating recoverer (5) supply heat for the heat tracing pipe.
3. The carbon black flue gas waste heat recovery system according to claim 1 or 2, further comprising a throat (9) and a bag filter, wherein an input end of the throat (9) is connected to a carbon black flue gas output end of the secondary preheating recoverer (5), and an output end of the throat (9) is connected to an input end of the bag filter, and the bag filter is configured to collect carbon black flue gas.
4. The carbon black flue gas waste heat recovery system according to claim 1 or 2, wherein the pressure range value of the air preheated by the air preheater (2) is 0.6Kpa-0.8Kpa, and the flow range value is 24000Nm3/h-26000Nm3And h, the temperature range value of the carbon black flue gas at the output end of the air preheater (2) is 680-750 ℃.
5. The carbon black flue gas waste heat recovery system according to claim 1 or 2, wherein the pressure range value of the first high-temperature steam at the high-temperature steam output end of the primary preheating recoverer (4) is 2Mpa-2.2Mpa, the flow range value is 6000kg/h-7000kg/h, and the temperature range value is 200 ℃ to 220 ℃;
the temperature range value of the carbon black flue gas output by the carbon black flue gas output end of the primary preheating recoverer (4) is 450-520 ℃.
6. The carbon black flue gas waste heat recovery system according to claim 1 or 2, wherein the temperature range value of the raw oil heated by the raw oil primary preheater (6) is 170 ℃ to 190 ℃, and the temperature range value of the raw oil heated by the raw oil secondary preheater (7) is 290 ℃ to 310 ℃.
7. The carbon black flue gas waste heat recovery system according to claim 1 or 2, wherein the primary raw oil preheater (6) and the secondary raw oil preheater (7) are both horizontal tubular heat exchangers;
the outer side of a tube array of the raw oil primary preheater (6) is provided with first high-temperature steam generated by the primary preheating recoverer (4), and the inner side of the tube array is provided with raw oil;
the outer side of a tube array of the raw oil secondary preheater (7) is carbon black smoke after passing through the primary preheating recoverer (4), and the inner side of the tube array is raw oil.
8. The carbon black flue gas waste heat recovery system according to claim 1 or 2, wherein the temperature of the carbon black flue gas at the output end of the raw oil secondary preheater (7) is 380-420 ℃.
9. The carbon black flue gas waste heat recovery system according to claim 1 or 2, wherein the steam pressure of the second high temperature steam output by the output end of the secondary preheating recoverer (5) ranges from 2.0Mpa to 2.2Mpa, the flow rate ranges from 1500kg/h to 1800kg/h, the temperature ranges from 200 ℃ to 220 ℃, and the carbon black flue gas temperature ranges from 230 ℃ to 270 ℃.
10. A carbon black production apparatus characterized by comprising a carbon black reaction furnace (1), and the carbon black flue gas waste heat recovery system according to any one of claims 1 to 9, the carbon black production apparatus being configured to produce carbon black for a hard rubber.
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| CN115960477A (en) * | 2023-03-13 | 2023-04-14 | 烁元新材料(东营)股份有限公司 | Carbon black reaction furnace and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115960477A (en) * | 2023-03-13 | 2023-04-14 | 烁元新材料(东营)股份有限公司 | Carbon black reaction furnace and use method thereof |
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