CN218627495U - Coal gasification fine slag quality improvement recycling system - Google Patents
Coal gasification fine slag quality improvement recycling system Download PDFInfo
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- CN218627495U CN218627495U CN202222247895.1U CN202222247895U CN218627495U CN 218627495 U CN218627495 U CN 218627495U CN 202222247895 U CN202222247895 U CN 202222247895U CN 218627495 U CN218627495 U CN 218627495U
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Abstract
The utility model discloses a coal gasification fine slag quality improvement recycling system, which belongs to the technical field of solid waste resource treatment in coal chemical industry, and comprises a boiler, a rotary cylinder dryer, a material conveying device and a desulfurization and denitrification device, wherein a feed inlet of the rotary cylinder dryer is provided with a high-temperature flue gas inlet communicated with a flue gas discharge port of the boiler, a discharge port of the rotary cylinder dryer conveys materials to a coal feeding port of the boiler through the material conveying device, and a tail gas discharge port of the rotary cylinder dryer is communicated with the desulfurization and denitrification device; after high-temperature flue gas is introduced into a feed inlet of the rotary cylinder dryer, wet gasified fine slag can be pre-dried, the drying speed is accelerated, the overall treatment efficiency is improved, the high-temperature flue gas moves towards a tail gas discharge port along the inside of the dryer, the high-temperature flue gas is matched with a heating device in the dryer, the wet gasified fine slag can be further dried, and meanwhile, water vapor generated by heating the wet gasified fine slag can be taken out of the rotary cylinder dryer together.
Description
Technical Field
The utility model relates to the technical field of coal chemical industry solid waste resource treatment, in particular to a coal gasification fine slag quality improvement recycling system.
Background
In the coal chemical industry, a large amount of chemical basic raw materials of carbon monoxide and hydrogen can be obtained after coal is gasified, a large amount of high-water-content gasified fine slag is obtained in the process, the gasified fine slag contains certain residual carbon, the calorific value of the gasified fine slag with water content of more than 50% is generally lower than 1000kcal/kg and cannot be utilized, the calorific value of the fine slag with water content of lower than 20% can reach 2000kcal/kg, and if the gasified fine slag is directly subjected to landfill treatment, the land is wasted, and the reduction and resource harmless utilization cannot be realized. At present, recycling methods are gradually proposed in the market, in which high-water-content coal gasification fine slag is dried and then mixed with coal to be burned, so that resource utilization can be effectively realized, for example, the utility model patent with the patent number of 202010707282.4 and the patent name of "system and method for improving and utilizing coal gasification fine slag based on particle size classification" is characterized in that the wet coal gasification fine slag is sent into a drying device to be dried, and then the dried coal gasification fine slag is sent into a boiler to be mixed with coal to be burned, so that the coal gasification fine slag can be recycled. However, the drying device in the coal gasification fine slag recycling system has poor drying effect and long drying time, so that the drying efficiency is slow, and the treatment efficiency of the whole system is insufficient.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the technical problem, the utility model provides a fine sediment of coal gasification is got up and is retrieved system, through introducing the high temperature flue gas in the boiler and turning round drum drier feed inlet department and carrying out the predrying to the fine sediment of wet coal gasification, can accelerate the dry speed of later stage in the turning round drum drier, thereby accelerate the fine sediment transport time of wet coal gasification, improve whole fine sediment of coal gasification and recycle the treatment effeciency, and the high temperature flue gas removes along the inside tail gas discharge port of orientation of desiccator, the cooperation is heating device in the desiccator, can further dry the fine sediment of wet coal gasification, can also take out the rotary drum drier with the vapor that the fine sediment of wet coal gasification produced heating together simultaneously.
In order to achieve the above object, the utility model provides a following scheme: the utility model discloses a coal gasification fine slag is put forward matter and is recycled system, including boiler, rotary cylinder desiccator, defeated material equipment and SOx/NOx control equipment, rotary cylinder desiccator's feed inlet department be equipped with the high temperature flue gas air inlet of the flue gas discharge port intercommunication of boiler, rotary cylinder desiccator's discharge gate passes through defeated material equipment to the defeated material of coal feeding port of boiler, rotary cylinder desiccator's tail gas discharge port with SOx/NOx control equipment intercommunication.
Preferably, a feed port of the rotary cylinder dryer is provided with a scattering device for scattering wet gasified fine slag.
Preferably, an induced draft fan is arranged between the tail gas outlet of the rotary cylinder dryer and the desulfurization and denitrification equipment.
Preferably, a dust remover is arranged between the tail gas outlet of the rotary cylinder dryer and the induced draft fan.
Preferably, the dust remover is a bag dust remover or a cyclone dust remover.
Preferably, an ash discharge port of the dust remover is communicated with the material conveying equipment.
Preferably, the material conveying equipment is an air flow conveying pipeline or a scraper conveyor or a belt conveyor.
Preferably, the rotary cylinder dryer is an air-flow type rotary cylinder dryer or an air-flow tube type rotary cylinder dryer.
The utility model discloses for prior art gain following technological effect:
1. the utility model discloses an among the fine sediment of coal gasification matter system of recycling of upgrading, rotary cylinder desiccator feed inlet department is provided with high temperature flue gas air inlet, after the flue gas discharge port intercommunication with the boiler, can let in rotary cylinder desiccator feed inlet department with the high temperature flue gas in the boiler and carry out the predrying to the fine sediment of wet coal gasification, thereby accelerate the dry speed of later stage in rotary cylinder desiccator, high temperature flue gas removes along the inside tail gas discharge port of desiccator simultaneously, on the one hand can continue to dry the fine sediment of wet coal gasification, heat with the inside heating device cooperation of rotary cylinder desiccator, further improve heating rate, accelerate the fine sediment transport time of wet coal gasification, improve whole fine sediment of coal gasification and recycle treatment efficiency, on the other hand can also take the rotary cylinder desiccator with the vapor that the fine sediment of wet coal gasification heating produced together, improve whole treatment effect.
2. The utility model discloses an among the fine sediment of coal gasification matter system of recycling, be equipped with the breaker at rotary drum drying machine's feed inlet, can break up the fine sediment of wet coal gasification that gets into rotary drum drying machine feed inlet department, improve and high temperature flue gas area of contact, show improvement predrying speed and effect.
3. The utility model discloses an among the fine sediment of coal gasification matter system of recycling, its most part all is the fine sediment of coal gasification in the dust in the rotary drum drier exhaust tail gas, consequently with the row's ash mouth of dust remover with defeated material equipment intercommunication back, can together send the dust under the dust remover interception to the boiler with the fine sediment of rotary drum drier exhaust coal gasification and burn, further improve the fine sediment utilization ratio of coal gasification.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic structural diagram of a coal gasification fine slag quality improvement and reuse system;
FIG. 2 isbase:Sub>A schematic view of the internal diffuser structure of FIG. 1A-A;
FIG. 3 is a side view of the diffuser.
Description of reference numerals: 1. a boiler; 2. desulfurization and denitrification equipment; 3. a rotary drum dryer; 4. a dust remover; 5. an induced draft fan; 6. a breaker; 7. a flue gas outlet; 8. a coal feeding port; 9. a high temperature flue gas inlet; 10. a tail gas discharge port; 11. a feeding hole of the rotary cylinder dryer; 12. a discharge port of the rotary cylinder dryer; 13. an ash discharge port; 14. an air locking valve; 15. dispersing the leaves.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
Example 1
The embodiment provides a coal gasification fine slag quality improvement and recycling system, which is shown in fig. 1 to 3 and comprises a boiler 1, a desulfurization and denitrification device 2, a rotary cylinder dryer 3 and a material conveying device, wherein a flue gas outlet 7 is arranged at the high-temperature position of a furnace chamber of the boiler 1, a high-temperature flue gas inlet 9 is arranged at a feed inlet 11 of the rotary cylinder dryer 3 and communicated with the flue gas outlet 7, a discharge outlet 12 of the rotary cylinder dryer 3 conveys materials to a coal feeding port 8 of the boiler 1 through the material conveying device, and a tail gas outlet 10 of the rotary cylinder dryer 3 is communicated with the desulfurization and denitrification device 2. High-temperature flue gas at the high-temperature position of a hearth of the boiler 1 can be introduced into a feed inlet 11 of the rotary cylinder dryer through a high-temperature flue gas inlet 9 and a flue gas outlet 7, wet gasified fine slag entering the feed inlet 11 of the rotary cylinder dryer is pre-dried, the subsequent drying speed inside the rotary cylinder dryer 3 is accelerated, the drying time of the wet gasified fine slag in the rotary cylinder dryer 3 is shortened, the overall system processing speed is improved, the high-temperature flue gas can move towards a tail gas outlet 10 along the inside of the rotary cylinder dryer 3, on one hand, the high-temperature flue gas can continue to be dried with wet materials inside the rotary cylinder dryer 3, and simultaneously, steam heated in the wet gasified fine slag can be carried out of the rotary cylinder dryer 3 together. And the fine coal gasified materials are dried by the rotary cylinder dryer 3, discharged through a discharge port 12 of the rotary cylinder dryer, then conveyed to a coal feeding port 8 of the boiler 1 under the action of conveying equipment, mixed with coal and then conveyed into the boiler 1 for combustion. The high-temperature flue gas doped with steam in the rotary cylinder dryer 3 is introduced into the desulfurization and denitrification equipment 2 through a tail gas outlet 10 of the rotary cylinder dryer for tail gas treatment, and is discharged into the atmosphere after the treatment is qualified.
The working principle is as follows:
high-temperature flue gas (with the temperature of 400-800 ℃) led out from a high-temperature part of a hearth of a boiler 1 enters a rotary cylinder dryer 3 through a discharge hole 12 of the rotary cylinder dryer, the high-temperature flue gas is rapidly contacted with wet gasified fine slag (with the moisture content of 30-70%) entering the discharge hole 12 of the rotary cylinder dryer, the gasified fine slag is rapidly dried under the action of the high-temperature flue gas, the temperature is increased to about 100 ℃, the heat value of the dried gasified fine slag (with the water content of less than 20%) can be increased to above 2000kcal/kg, the dried gasified fine slag is conveyed to a coal feeding hole 8 of the boiler 1 and is mixed with coal to enter the boiler 1 for combustion, dry tail gas (with the temperature of about 300 ℃) discharged from a tail gas discharge hole 10 of the rotary cylinder dryer 3 enters a denitration and desulfurization device 2 for treatment, and is discharged after the dry tail gas is qualified.
In the embodiment, as shown in fig. 1 to 3, the feed inlet 11 of the rotary cylinder dryer is provided with a disperser 6 for dispersing wet coal gasification fine slag. The scattering device 6 can be a scattering device commonly seen in the market, referring to fig. 2 and 3, the scattering device 6 is a drum-type scattering device, and a plurality of scattering blades 15 are arranged on a rotating shaft in the scattering device, so that wet gasified fine materials introduced into a feed port 11 of the rotary drum dryer are scattered, the contact area of the wet gasified fine materials and high-temperature flue gas is increased, the gasified fine slag is rapidly dried under the action of the high-temperature flue gas and scattering, and the drying effect and the drying speed are improved.
In this embodiment, as shown in fig. 1 to 3, an induced draft fan 5 is disposed between the exhaust gas outlet 10 of the rotary cylinder dryer 3 and the desulfurization and denitrification apparatus 2, and the induced draft fan 5 is driven to accelerate the exhaust gas discharge in the rotary cylinder dryer 3, and at the same time, the rotary cylinder dryer 3 can be in a negative pressure state, so as to suck the high-temperature flue gas in the boiler 1 into the rotary cylinder dryer 3.
Further, in the present embodiment, as shown in fig. 1 to 3, a dust remover 4 is provided between the exhaust gas discharge port 10 of the rotary drum dryer 3 and the induced draft fan 5 to remove dust from the exhaust gas discharged from the rotary drum dryer 3.
Further, in the present embodiment, as shown in fig. 1 to fig. 3, the dust remover 4 is a bag-type dust remover or a cyclone dust remover.
Further, in the present embodiment, as shown in fig. 1 to 3, the ash discharge port 13 of the dust catcher 4 leads to the material conveying device, so as to be conveyed into the boiler 1 for combustion, and the dust intercepted by the dust catcher 4 has a main component of the dried coal gasification fine slag carried by the tail gas of the rotary cylinder dryer 3, so that the dust can be directly introduced into the coal charging port 8 to be mixed with coal for combustion, and can be reused.
In this embodiment, as shown in fig. 1 to 3, air lock valves 14 are disposed at the ash discharge port 13 of the dust remover 4 and the discharge port 12 of the rotary cylinder dryer, so that air enters the dust remover 4 and the rotary cylinder dryer 3 during surface discharge.
In this embodiment, as shown in fig. 1 to fig. 3, the material conveying device may be an air flow conveying pipe, and may also be a scraper conveyor or a belt conveyor.
In the present embodiment, as shown in fig. 1 to 3, the rotary drum dryer 3 is an air-flow type rotary drum dryer or an air-flow tube type rotary drum dryer. The core components of the rotary cylinder dryer 3 comprise a rotary cylinder, a rolling ring, a gear ring, a tug train, a transmission system, a feeding and discharging box, a shoveling plate, an overflow weir and the like.
This embodiment 2
The embodiment provides a coal gasification fine slag quality improvement and reuse method, as shown in fig. 1 to 3, comprising the following steps:
s1, introducing high-temperature flue gas in a hearth of a boiler 1 into a feed port 11 of a rotary cylinder dryer 3, and continuously and quantitatively introducing wet gas gasification fine slag into the feed port 11 of the rotary cylinder dryer;
s2, conveying the coal gasification fine slag dried by the rotary cylinder dryer 3 to a coal feeding port 8 of the boiler 1, mixing the coal gasification fine slag with coal, and feeding the mixture into the boiler 1 for combustion;
and S3, carrying out desulfurization and denitrification treatment on the tail gas discharged by the rotary cylindrical dryer 3, and discharging the qualified tail gas.
Specifically, the coal gasification fine slag upgrading and recycling system in example 1 can be used for treatment. High-temperature flue gas (with the temperature of 400-800 ℃) led out from a high-temperature position of a hearth of a boiler 1 enters a rotary cylinder dryer 3 through a discharge port 12 of the rotary cylinder dryer, the high-temperature flue gas is rapidly contacted with wet coal gasification fine slag (with the moisture content of 30-70%) entering the discharge port 12 of the rotary cylinder dryer, the coal gasification fine slag is rapidly dried under the action of the high-temperature flue gas, the temperature is raised to about 100 ℃, the heat value of the dried coal gasification fine slag (with the water content of less than 20%) can be raised to more than 2000kcal/kg, then the dried coal gasification fine slag is conveyed to a coal feeding port 8 of the boiler 1, the coal gasification fine slag is mixed with coal and then enters the boiler 1 for combustion, dry tail gas (with the temperature of about 300 ℃) discharged from a tail gas discharge port 10 of the rotary cylinder dryer 3 enters a denitration and desulfurization device 2 for treatment, and the dry tail gas is discharged after being qualified.
In this embodiment, as shown in fig. 1 to 3, in step S3, the exhaust gas discharged from the rotary drum dryer 3 is subjected to a dust removal treatment and then to a desulfurization and denitrification treatment, and the treated dust is discharged to the coal charging port 8 of the boiler 1, mixed with coal, and then fed into the boiler 1 for combustion.
The utility model discloses a specific example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for those skilled in the art, the idea of the present invention may be changed in the specific embodiments and the application range. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (8)
1. The utility model provides a coal gasification fine slag is put forward matter and is recycled system, its characterized in that, including boiler, gyration cylinder drying machine, defeated material equipment and SOx/NOx control equipment, the feed inlet department of gyration cylinder drying machine be equipped with the high temperature flue gas air inlet of the flue gas discharge port intercommunication of boiler, the discharge gate of gyration cylinder drying machine passes through defeated material equipment to the defeated material of coal feeding port of boiler, the tail gas discharge port of gyration cylinder drying machine with SOx/NOx control equipment intercommunication.
2. The coal gasification fine slag quality improving and recycling system according to claim 1, wherein the feed inlet of the rotary cylinder dryer is provided with a breaker for breaking up wet coal gasification fine slag.
3. The coal gasification fine slag quality improving and recycling system according to claim 1, wherein an induced draft fan is arranged between a tail gas outlet of the rotary cylinder dryer and the desulfurization and denitrification equipment.
4. The coal gasification fine slag quality improving and recycling system according to claim 3, wherein a dust remover is arranged between the tail gas outlet of the rotary cylinder dryer and the induced draft fan.
5. The coal gasification fine slag quality improving and recycling system according to claim 4, wherein the dust remover is a bag dust remover or a cyclone dust remover.
6. The coal gasification fine slag quality improving and recycling system according to claim 4, wherein the ash discharge port of the dust remover is communicated with the material conveying device.
7. The coal gasification fine slag quality improving and recycling system according to claim 6, wherein the material conveying equipment is an air flow conveying pipeline, a scraper conveyor or a belt conveyor.
8. The coal gasification fine slag upgrading and recycling system according to claim 1, wherein the rotary cylinder dryer is an air-flow type rotary cylinder dryer or an air-flow tube type rotary cylinder dryer.
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| CN202222247895.1U CN218627495U (en) | 2022-08-25 | 2022-08-25 | Coal gasification fine slag quality improvement recycling system |
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| CN202222247895.1U CN218627495U (en) | 2022-08-25 | 2022-08-25 | Coal gasification fine slag quality improvement recycling system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115325775A (en) * | 2022-08-25 | 2022-11-11 | 天华化工机械及自动化研究设计院有限公司 | Coal gasification fine slag quality improvement recycling system and method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115325775A (en) * | 2022-08-25 | 2022-11-11 | 天华化工机械及自动化研究设计院有限公司 | Coal gasification fine slag quality improvement recycling system and method thereof |
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