CN216824846U - System for realize thin sediment of gasification atomizing and drying in coordination - Google Patents
System for realize thin sediment of gasification atomizing and drying in coordination Download PDFInfo
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- CN216824846U CN216824846U CN202220391964.3U CN202220391964U CN216824846U CN 216824846 U CN216824846 U CN 216824846U CN 202220391964 U CN202220391964 U CN 202220391964U CN 216824846 U CN216824846 U CN 216824846U
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Abstract
The utility model discloses a system for realizing atomization and drying of gasified fine slag cooperatively, which comprises a pressurizing pumping device, a two-stage high-temperature high-pressure atomizing and drying device and an atomizing and drying medium system; the pressurization pumping device mainly comprises a gasification fine slag storage bin, a positive pressure feeder, a paste pump and a conveying pipeline which are sequentially connected, and the conveying pipeline is connected with an atomization front cavity of the two-stage high-temperature high-pressure atomization drying device; the two-stage high-temperature high-pressure atomization drying device comprises an atomization front cavity, and the tail end of the atomization front cavity comprises a flow guide structure and a solid discrete grid; the primary atomizing sleeve is arranged outside the atomizing front cavity and is of an annular channel structure; the secondary atomizing sleeve and the atomizing drying chamber are arranged at the downstream of the atomizing front cavity to form an atomizing drying main body structure; the atomization drying medium system comprises a hot primary air bypass, and the hot primary air bypass is connected to the first-stage atomization sleeve and the second-stage atomization sleeve. The utility model provides a condition for the pulverized coal boiler to perform gasification and fine slag mixing combustion.
Description
Technical Field
The utility model belongs to the technical field of thermal power and solid waste handle, concretely relates to realize thin sediment of gasification atomizing and dry system in coordination.
Background
With the large-scale popularization of the coal gasification technology, the stockpiling amount and the production amount of the gasified coal slag are larger and larger, so that the serious environmental pollution and the land resource waste are caused, the sustainable development of coal chemical enterprises is adversely affected, and the gasified coal slag treatment is urgent. If the gasification slag is effectively recycled, the method has important significance for building an environment-friendly society and realizing low-carbon economy. The comprehensive utilization of the gasified slag mainly comprises building materials, soil water body remediation, residual carbon utilization based on co-combustion and high-value utilization based on a catalyst carrier. The carbon content of the gasified fine slag is higher than that of the gasified coarse slag, so that the building material mixing amount is low, the quality is unstable, and the economic and environmental benefits are poor. In the aspects of development and utilization of carbon materials, preparation of ceramic materials and the like, the gasified slag has relatively obvious economic benefit, but is in the laboratory research stage, has the problems of high cost, complex flow, difficult regulation and control of impurities, small downstream market and the like, and cannot realize large-scale utilization.
The high carbon content of the gasified fine slag is one of the reasons that the gasified fine slag is difficult to utilize, and the high carbon content gasified fine slag is circularly mixed and burnt, so that not only is the carbon resource utilized, but also the high carbon slag is converted into the low carbon slag, and the gasification utilization of building materials of the gasified slag is facilitated. The gasified fine slag can be directly introduced into the circulating fluidized bed boiler for mixed combustion through a pipeline conveying system by means of a paste pump, and can also be pre-dried and then introduced into a coal conveying system. Because the gasification fine slag has high water content, a large amount of drying media such as steam and the like are consumed through the pre-drying treatment process, the operation cost is high, and secondary dust pollution is easily caused; meanwhile, the gasified fine slag is dried by the drying equipment, mixed with raw coal and sent to a boiler for combustion, crushing equipment and a coal bunker are often blocked, and the mixing combustion proportion is low.
The pulverized coal boiler is a boiler device using pulverized coal as fuel, and has the advantages of rapid and complete combustion, large capacity, high efficiency, wide coal adaptation range, convenient control and adjustment, and the like. The pulverized coal boiler is adopted to mix and burn the gasified fine slag, so that the processing path of the gasified fine slag is greatly widened, the resource comprehensive utilization of the gasified fine slag in a wider range is realized, and the environmental pollution is reduced. But the technology of directly mixing and burning gasified fine slag in the existing pulverized coal boiler is not mature.
The gasification fine slag has high water content and high viscosity, and if a conventional coal conveying mode is adopted, a raw coal bin can be blocked, the phenomenon that a belt of a coal feeder slips is caused, the coal breakage phenomenon occurs frequently, the load of a unit fluctuates frequently and greatly, and the operation safety of the unit is influenced.
The synthetic gas of the gasification device contains a large amount of chloride, and the synthetic gas is subjected to washing and flash evaporation processes at all levels, and chloride ions are not easy to react with other substances, are not easy to precipitate and can not be decomposed, and finally a part of chloride enters the gasified fine slag, so that the gasified fine slag has high corrosivity. The introduction of the gasified fine slag directly into the coal mill via the paste pumping system leads to corrosion of the components in the coal mill and to accelerated wear of the grinding rollers, grinding disks, separators, etc.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of above-mentioned prior art existence, the utility model aims to provide a realize thin sediment of gasification atomizing and dry system in coordination, through adopting pressurization pumping installations and two-stage high temperature high pressure atomizing drying device to realize the abundant atomizing and the drying of the thin sediment of gasification, form the thin sediment of gasification and carry and flow, mix for pulverized coal boiler the thin sediment of gasification and burn the creation condition.
In order to realize the purpose, the utility model discloses a technical scheme is:
a system for realizing atomization and drying of gasified fine slag cooperatively comprises a pressurizing pumping device, a two-stage high-temperature high-pressure atomizing and drying device and an atomizing and drying medium system;
the pressurizing and pumping device comprises a gasification fine slag storage bin 1, a positive pressure feeder 2, a paste pump 3, a conveying pipeline 4 and a gasification slag electric shutoff door 21 arranged on the conveying pipeline 4, which are sequentially connected, wherein the conveying pipeline 4 is connected with an atomization front cavity 6 of the two-stage high-temperature and high-pressure atomization drying device;
the two-stage high-temperature high-pressure atomization drying device comprises an atomization front cavity 6, wherein the tail end of the atomization front cavity 6 comprises a flow guide structure 7 and a solid discrete grid 8; the primary atomizing sleeve 9 is arranged outside the atomizing front cavity 6 and is of an annular channel structure; the secondary atomizing sleeve 10 and the atomizing drying chamber 11 are arranged at the downstream of the atomizing front cavity 6 to form an atomizing drying main body structure;
the atomization drying medium system comprises a hot primary air bypass 13, and the hot primary air bypass 13 is connected to the first-stage atomization sleeve 9 and the second-stage atomization sleeve 10.
The flow guide structure 7 is of an annular structure, the cross section of the flow guide structure is triangular, the atomization jet flow direction of the first-stage atomization sleeve 9 is improved, and the jet flow has axial and radial components and strengthens atomization of gasified fine slag.
The inner ring of the second-stage atomizing sleeve 10 is provided with atomizing jet flow channels which are uniformly provided with fine holes along the circumference.
A gasification fine slag carrying flow conveying pipeline 18 and a carrying flow electric shutoff door 19 are arranged at the downstream of the atomization drying chamber 11.
The end of the gasification fine slag carrying flow conveying pipeline 18 is connected with a coal powder pipeline 23.
The hot primary air bypass 13 is provided with a booster fan 15, the hot primary air bypass is divided into three pipelines through the booster fan 15, the three pipelines are respectively provided with a first-stage electric adjusting door 16, a second-stage electric adjusting door 17 and a sweeping electric adjusting door 20, the pipeline of the first-stage electric adjusting door 16 is connected to the second-stage atomizing sleeve 10 on the first-stage atomizing sleeve 9, and the pipeline of the sweeping electric adjusting door 20 is connected to the cavity 6 before atomization.
The hot primary air bypass 13 is led out from the hot primary air main pipe 12, the downstream of the hot primary air main pipe 12 is connected with a coal mill 22, and a coal powder pipeline 23 is arranged at the outlet of the coal mill 22.
The utility model has the advantages that:
1. the formed gasified fine slag carrying flow is introduced into a pulverized coal pipeline by adopting an independent conveying way and an efficient atomizing device, so that adverse effects such as corrosion, abrasion and the like on a raw coal bunker, a coal feeder and a coal pulverizer are avoided.
2. The primary dispersion of the paste-shaped gasified fine slag is realized by adopting a solid dispersion grid; high-pressure atomized air is introduced into the two-stage atomizing sleeve, and efficient atomization of the gasified fine slag is realized through an optimized flow channel structure; the drying of the high-moisture gasified fine slag is realized by means of high-temperature air and a strong atomization disturbance effect, the moisture is evaporated and separated out in the drying process to promote the further crushing of the bulk gasified fine slag, and the atomization and the drying processes supplement each other.
3. The grain size of the gasified fine slag is very small, the gasified fine slag can be directly introduced into a pulverized coal pipeline without being ground by a coal mill, and the subsequent burnout characteristic is basically not influenced;
4. the gasified fine slag does not need to be subjected to additional pre-drying, so that the investment cost and the steam cost of a drying device are reduced.
Drawings
FIG. 1 is a schematic view of the system for realizing atomization and drying of gasified fine slag cooperatively.
Description of reference numerals:
1 is a gasification fine slag storage bin; 2 is a positive pressure feeder; 3 is a paste pump; 4 is a conveying pipeline; 5 is a flange; 6 is a cavity before atomization; 7 is a flow guide structure; 8 is a solid discrete grid; 9 is a first-grade atomizing sleeve; 10 is a secondary atomizing sleeve; 11 is an atomization drying chamber; 12 is a primary hot air main pipe; 13 is a hot primary air bypass; 14 is a bypass electric shutoff gate; 15 is a booster fan; 16 is a first-stage electric adjusting door; 17 is a two-stage electric adjusting door; 18 is a gasification fine slag carrying flow conveying pipeline; 19 is a carrier current power shutoff gate; 20 is a purging electric regulating valve; 21 is an electric shutoff door for gasified slag; 22 is a coal mill; 23 is a pulverized coal pipe.
Detailed Description
The present invention will be described in further detail with reference to examples.
Referring to fig. 1, the system for realizing atomization and drying of gasified fine slag cooperatively provided by the utility model mainly comprises a gasified fine slag storage bin 1; a positive pressure feeder 2; a paste pump 3; a delivery duct 4; a flange 5; a cavity 6 before atomization; a flow guide structure 7; a solid discrete grid 8; a primary atomizing sleeve 9; a secondary atomizing sleeve 10; an atomizing drying chamber 11; a hot primary air main 12; a hot primary air bypass 13; a bypass electrical shutoff gate 14; a booster fan 15; a primary electric regulating gate 16; a secondary electric regulating gate 17; a gasification fine slag entrained flow delivery conduit 18; a carry-current power shut-off gate 19; purging the electric regulating valve 20; an electric shutoff gate 21 for gasified slag; a coal mill 22; a pulverized coal pipe 23. The conveying pipeline 4 is connected with the atomizing front cavity 6 through a flange 5; the hot primary air bypass 13 is connected with the first-stage atomizing sleeve 9 and the second-stage atomizing sleeve 10; the gasification fine slag carrying stream delivery pipe 18 is connected to a pulverized coal pipe 23.
The gasification fine slag storage bin 1, the positive pressure feeder 2, the paste pump 3 and the conveying pipeline 4 form a pressurizing and pumping device;
a hot primary air bypass 13 led out from the hot primary air main pipe 12 is connected to the primary atomizing sleeve 9, the secondary atomizing sleeve 10 and the atomizing front cavity 6; a booster fan 15, a primary electric adjusting door 16, a secondary electric adjusting door 17 and a purging wind electric adjusting door 20 are arranged on the hot primary wind bypass.
The tail end of the atomization front cavity 6 is provided with a flow guide structure 7 and a solid discrete grid 8; a primary atomizing sleeve 9 is arranged outside the atomizing front cavity 6; a secondary atomizing sleeve 10 and an atomizing drying chamber 11 are arranged at the downstream of the atomizing front cavity 6; the atomized drying chamber 11 outlet gasified fine slag carrying conveying pipeline 18 is connected to a coal powder pipeline 23.
The specific implementation process comprises the following steps:
after the gasification fine slag is subjected to impurity removal, appropriate thermal refining is carried out to form a paste-shaped material suitable for pipeline conveying, the paste-shaped material is stored in a gasification fine slag storage bin 1, continuous feeding and metering of the material are carried out by adopting a positive pressure feeder 2, in order to realize pipeline conveying, pressurization treatment of the material is carried out by adopting a paste pump 3, and then the paste-shaped gasification fine slag is introduced to a cavity 6 before atomization by adopting a conveying pipeline 4, so that continuous feeding, metering and conveying of the gasification fine slag are completed.
The drying of the gasified fine slag is comprehensively considered, the atomized air adopts hot primary air, is led out from a hot primary air main pipe 12 through a hot primary air bypass 13, is respectively led into a first-stage atomizing sleeve 9 and a second-stage atomizing sleeve 10 after the pressure head is improved by a booster fan 15, and the distribution of the atomized air in the two-stage atomizing sleeve is adjusted by the opening degree of a first-stage electric adjusting door 16 and a second-stage electric adjusting door 17. When the atomized air is conveyed, the bypass electric shutoff door 14 is in a fully open state, the booster fan 15 can be driven by a variable frequency motor, and the variable frequency is adopted for adjustment according to the flow of the atomized material. Because of the presence of dust-containing particles of a certain concentration in the hot primary air, the blades of the booster fan 15 can be subjected to abrasion-proof treatment.
The paste material entering the atomization device is subjected to primary dispersion through a solid dispersion grid 8 arranged at the tail end of the cavity 6 before atomization to form a belt-shaped material with a certain dispersion degree; the atomized air jet flow led out from the primary atomizing sleeve 9 has radial and axial momentum to promote the atomization of the gasified fine slag, and the material enters the atomizing and drying chamber 11 by the axial power so as to finish the primary atomization of the gasified fine slag; atomizing air is gradually introduced into the atomizing and drying chamber 11 through an atomizing and jetting channel on the inner side of the secondary atomizing sleeve 10, the secondary atomizing and jetting air is in a radial direction, the contact with the gasified fine slag is strengthened, the drying and crushing of the water-containing material are promoted, and the gasified fine slag carrying flow containing fine particles is further formed; the resulting fine gasification slag carrier stream is introduced into the coal fines duct 23 via the fine gasification slag carrier stream delivery duct 18.
When the high-temperature high-pressure atomization drying device operates, the electric door adjusting door 20 is in a closed state, and the gasified slag electric shutoff door 21 and the entrained flow electric shutoff door 19 are in a fully open state;
when the high-temperature high-pressure atomization drying device is stopped, firstly, the electric gasified slag shutoff door 21 is closed, and the gasified fine slag pressurization pumping system and the high-temperature high-pressure atomization drying device are cut off; simultaneously, the opening degrees of the first-stage electric regulating door 16 and the second-stage electric regulating door 17 are reduced, the opening degree of the purging electric regulating door 20 is increased, and the residual materials in the atomizing device are purged through high-temperature high-pressure atomizing air; after the purging is finished, the electric doors and the booster fan 15 are closed to prevent the pulverized coal airflow in the pulverized coal pipeline 23 from pouring into the atomization drying device.
The utility model discloses at the concrete implementation in-process, pressurization pumping installations and two-stage high temperature high pressure atomizing drying device all need adopt resistant chloride ion and acid corrosion material to make.
The utility model discloses at the concrete implementation in-process, by atomizing material not be limited to the thin sediment of gasification, can be used to the less, the great material of viscidity of particle diameter, like coal slime and mud.
Claims (7)
1. A system for realizing atomization and drying of gasified fine slag cooperatively is characterized by comprising a pressurizing pumping device, a two-stage high-temperature high-pressure atomizing and drying device and an atomizing and drying medium system;
the pressurization pumping device mainly comprises a gasification fine slag storage bin (1), a positive pressure feeder (2), a paste pump (3) and a conveying pipeline (4) which are sequentially connected, and a gasification slag electric shutoff door (21) arranged on the conveying pipeline (4), wherein the conveying pipeline (4) is connected with an atomization front cavity (6) of the two-stage high-temperature and high-pressure atomization drying device;
the two-stage high-temperature high-pressure atomization drying device comprises an atomization front cavity (6), wherein the tail end of the atomization front cavity (6) comprises a flow guide structure (7) and a solid discrete grid (8); the primary atomizing sleeve (9) is arranged outside the atomizing front cavity (6) and is of an annular channel structure; the secondary atomizing sleeve (10) and the atomizing drying chamber (11) are arranged at the downstream of the atomizing front cavity (6) to form an atomizing drying main body structure;
the atomizing and drying medium system comprises a hot primary air bypass (13), and the hot primary air bypass (13) is connected to the primary atomizing sleeve (9) and the secondary atomizing sleeve (10).
2. The system for realizing atomization and drying of gasified fine slag in a synergistic manner according to claim 1, wherein the flow guiding structure (7) is an annular structure with a triangular cross-sectional shape for improving the direction of the atomization jet of the primary atomization sleeve (9), and the jet has axial and radial components for enhancing atomization of gasified fine slag.
3. The system for realizing atomization and drying of gasified fine slag cooperatively according to claim 1, wherein the secondary atomizing sleeve (10) is internally provided with atomizing jet flow channels with fine holes uniformly opened along the circumference.
4. A system for realizing atomization and drying of gasified fine slag cooperatively according to claim 1, wherein a pipeline (18) for conveying the entrained flow of the gasified fine slag and an electric shutoff door (19) for the entrained flow are arranged downstream of the atomization and drying chamber (11).
5. A system for the synergistic atomization and drying of fine gasification slag according to claim 4, characterized in that the end of the fine gasification slag carrying flow conveying pipe (18) is connected with a pulverized coal pipe (23).
6. The system for realizing atomization and drying of gasified fine slag cooperatively according to claim 1, wherein a booster fan (15) is arranged on the hot primary air bypass (13), the hot primary air bypass is divided into three pipelines by the booster fan (15), the three pipelines are respectively provided with a primary electric adjusting door (16), a secondary electric adjusting door (17) and a purging electric adjusting door (20), the pipeline of the primary electric adjusting door (16) is arranged on the primary atomizing sleeve (9), the pipeline of the secondary electric adjusting door (17) is connected to the secondary atomizing sleeve (10), and the pipeline of the purging electric adjusting door (20) is connected to the cavity (6) before atomization.
7. The system for realizing atomization and drying of gasified fine slag synergistically according to claim 1, wherein the hot primary air bypass (13) is led out from a hot primary air main pipe (12), a coal mill (22) is connected downstream of the hot primary air main pipe (12), and a coal dust pipeline (23) is arranged at an outlet of the coal mill (22).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220391964.3U CN216824846U (en) | 2022-02-24 | 2022-02-24 | System for realize thin sediment of gasification atomizing and drying in coordination |
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| CN202220391964.3U CN216824846U (en) | 2022-02-24 | 2022-02-24 | System for realize thin sediment of gasification atomizing and drying in coordination |
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