WO2011060620A1 - 一种干燥干选联合原煤提质设备及方法 - Google Patents
一种干燥干选联合原煤提质设备及方法 Download PDFInfo
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- WO2011060620A1 WO2011060620A1 PCT/CN2010/001858 CN2010001858W WO2011060620A1 WO 2011060620 A1 WO2011060620 A1 WO 2011060620A1 CN 2010001858 W CN2010001858 W CN 2010001858W WO 2011060620 A1 WO2011060620 A1 WO 2011060620A1
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- Prior art keywords
- coal
- dry
- drying
- raw coal
- hot air
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/08—Treating solid fuels to improve their combustion by heat treatments, e.g. calcining
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/26—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by reciprocating or oscillating conveyors propelling materials over stationary surfaces; with movement performed by reciprocating or oscillating shelves, sieves, or trays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/02—Heating arrangements using combustion heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
- F26B25/007—Dust filtering; Exhaust dust filters
Definitions
- the invention relates to the field of material sorting, in particular to a dry and dry sorting combined raw coal upgrading equipment and method, which is also suitable for sorting and upgrading materials other than coal. Background technique
- coal As well as ash and sulfur, are important factors affecting coal quality.
- coal In order to improve the quality of coal, coal must be dewatered and sorted. With the development of coal upgrading technology, coal drying and dry selection processes have been widely used and have achieved remarkable results.
- a slime drying device which is composed of a fluidized bed drying portion and a heat source supply portion, and the fluidized drying portion is composed of a coal conveyor, a crusher, a pre-dryer, a screw feeder, A fluidized bed boiling drying furnace, a two-stage cyclone separator, a belt conveyor, and the like are sequentially connected, and the heat source supply portion is composed of a flue gas furnace, a mixer, and an auxiliary device.
- a sorting bed excitation device for a wind jigging dry coal separator which comprises a vibration motor and an elastic component, a vibration motor and a sorting bed fixed, a vibration motor shaft and a sorting bed.
- the sieve surface of the sieve plate is vertical; according to the wind jigging dry method, the coal is selected as the medium, and the working characteristics of the wind jigging layer are formed for the sorting materials, and the vibration vibration device is used for the symmetric installation of the vibration motor of the same specification, and the vibration motor
- the output shaft is perpendicular to the working surface of the sorting bed.
- the design makes the vibration direction of the sorting bed coincide with the output direction of the material.
- the vibration motor does not need to carry the material to throw up the movement. The material depends on the wind to lift and jigging on the sorting bed. In the stratification process, the discharge device is entered in a shorter stroke.
- the "Coal Drying System Optimization Study” published in the "Journal of Coal” 2004 04 discloses a dry coal preparation process, in which the coal-based heavy fluidized bed dry coal selection control requirements for the selected raw coal moisture are combined.
- composite dry coal preparation is an effective and practical technology for coal drainage and sulfur reduction, saving water resources, avoiding secondary pollution of coal slurry water, simple process, low investment, low production cost, and suitable for China with its unique characteristics.
- the demand for coal enterprises has been rapidly promoted and applied, providing an economical and practical coal preparation method for coal processing.
- the size of raw coal is one of the main influencing factors for the use of dry coal.
- the coal with external moisture exceeding 9% is reduced due to the sorting effect, and the dry coal preparation technology cannot be directly used.
- China's lignite resources are abundant, but coal is seriously cemented, and dry coal must be used.
- due to the low degree of metamorphism and large water content it is the main reason that affects the dry selection of coal.
- the drying device in the process of drying high-moisture coal, the drying device requires a large amount of heat source and sufficient drying time, and the processing capacity is inversely proportional to the dewatering strength. At present, the drying device is greatly limited in order to increase the yield. , dehydration at 6-12 ° /. Between the drying alone, the calorific value is limited. Compared with dry selection, the investment and production costs of drying equipment of the same scale are 3-4 times that of dry selection.
- coal In addition, as we all know, China is a big country in the production and consumption of coal. In the primary energy composition, coal accounts for a high proportion of 75%. A large amount of coal is converted into electricity to support the needs of the national economy. Of the 1.325 billion tons of raw coal produced in 1997, 523 million tons were used for power generation. That is, coal-fired power plants consumed 39.5% of the country's coal production, making it the largest coal user. Power generation relies on coal as the main source of energy, as is the case in many developed countries. For example, in the United States, a power generation and coal producing country, 86% to 89% of its total domestic coal consumption is for power plants. Therefore, the capital investment, economic operation, and environmental impact of coal-fired power plants are largely related to coal quality. In the cost of thermal power generation, coal costs account for 80%. Therefore, it is crucial to improve the impact of coal quality on coal-fired power plants.
- the present inventors have proposed a dry dry selection combined with raw coal upgrading equipment and method, and the dry dry selection combined with raw coal upgrading equipment and method better solves the disadvantages of dry dry selection alone, and Through the dry and dry joint operation, not only the sharing of the same functional equipment is realized, but also the recycling of energy by-products of the coal preparation process (such as meteorite) is realized.
- a dry dry selection combined raw coal upgrading device which comprises a coal supply system, a hot air system, a drying system, a dust removal exhaust system and a dry selection system, wherein the coal supply system can be divided into dry raw coal.
- the coal supply system uses raw coal transport device to supply raw coal to the hot air system and the drying system respectively;
- the hot air system is a heat supply part of the drying system, and the hot air system includes a hot blast stove and a settling chamber
- the first main fan the hot air system generates the flue gas generated in the hot air furnace through the sedimentation chamber to be treated by Mars, and then mixed with the cold air to become a certain temperature, the hot air is pressurized and supplied to the drying system through the first main fan, and the first induced draft fan is discharged.
- the tuyere is connected to the lower part of the dryer in the drying system; the drying system is used for drying and dehydrating the raw coal, reducing the moisture of the raw coal, and the dried coal product is sent to the dry selection system via the dried product transport mechanism; the dust exhaust system is used for Fine particle coal dust recovery, dust removal and exhaust system including dust collector and exhaust fan, dust removal and exhaust system connected Between the drying system and the dry selection system, the exhaust fan is composed of an induced draft fan and an exhaust pipe; the dry selection system includes a dry sorting machine, a circulating fan, and a cyclone dust collector, and is used for sorting the dried raw coal into clean coal. , China Coal and Meteorite.
- the temperature of the hot air generated by the flue gas generated in the hot blast stove through the sedimentation chamber in addition to Mars and then mixed with the cold air is about 50 ° C to 280 ° C.
- the temperature of the hot air mixed with cold air is about 250 °C.
- the raw coal transport device is a raw coal belt conveyor, and the product transport mechanism after drying is Product belt conveyor after drying.
- the core equipment of the drying system is a vibrating mixed flow dryer.
- the dry sorter in the dry selection system is a composite dry coal separator.
- the hot blast stove is a chain type hot blast stove or a boiling type hot blast stove.
- a dry dry selection combined with raw coal upgrading method comprising the steps of:
- Hot blast stove is divided into chain type hot blast stove and boiling type hot blast stove.
- the low calorific value of raw coal is more than 16000kJ/kg, that is, about 3840 kcal / kg As the fuel of the chain type hot blast stove; when the low calorific value of the raw coal is less than 16000 kJ/kg, the boiling hot blast stove is used as the hot blast stove of the coal supply system;
- the drying system uses a vibrating mixed-flow dryer, the coal flow flows from the top to the bottom through a multi-layer vibrating bed to the coal outlet, and the hot air passes through the upper row of the multi-layer vibrating bed from bottom to top.
- the gas port is discharged, and the macroscopic flow between the coal stream and the hot air is countercurrent, that is, there is a vertical cross flow of coal and hot air inside the dryer, and a horizontal countercurrent of coal and hot air;
- Dust removal by dust removal and exhaust system consists of a dust remover and an exhaust fan.
- the dust remover separates the coal powder from the exhaust gas into the product coal, and the cleaned exhaust gas after treatment is exhausted by the exhaust fan;
- the use of the dry dry selection combined with raw coal upgrading equipment and method according to the present invention overcomes the above-mentioned defects in the use of drying and dry selection equipment alone, not only the dry coal preparation and drying process
- the combination of machine and land brings out the advantages of drying and dry selection, and expands the application range of equipment, less investment, low production cost, easy to promote and apply coal upgrading technology; and greatly avoid energy waste.
- FIG. 1 is a schematic view showing the structure of a dry-drying combined raw coal upgrading device according to the technical scheme of the present invention
- FIG. 2 is a flow chart showing the process of the dry-drying combined raw coal upgrading method according to the technical scheme of the present invention.
- 1 hot blast stove; 2: raw coal belt conveyor; 3: settling chamber; 4: first main fan; 5: dryer; 6: dry belt conveyor; 7: dust collector; 8: induced draft fan; : Exhaust pipe; 10: Second main fan; 11: Cyclone dust collector; 12: Dry sorter; 13: Clean coal belt conveyor; 14: Vermiculite belt conveyor; 15: Coal belt conveyor.
- a dry dry selection combined with raw coal upgrading equipment includes a coal supply system, a hot air system, a drying system, a dust removal and exhaust system, and a dry selection system.
- the coal supply system can be divided into two parts: dry raw coal supply coal and hot blast furnace coal.
- the coal supply system uses the raw coal transport device to supply the raw coal to the hot air system and the drying system respectively; the raw coal transport device shown in Fig. 1 is the raw coal belt.
- Machine 2 chain transport mechanisms and other conventional material transport mechanisms can also be used.
- the hot air system is a heat supply part of the drying system, and the hot air system includes a hot air furnace 1, a sedimentation chamber 3, and a first main fan 4, and the hot air system passes the flue gas generated in the hot air furnace 1 through the sedimentation chamber 3 to remove the Mars.
- the hot air mixed with the cold air to a certain temperature is pressurized and supplied to the drying system through the first main fan 4, and the air outlet of the first main fan 4 is connected to the lower portion of the dryer 5 in the drying system.
- the flue gas generated in the hot blast stove 1 The temperature of the hot air in the sedimentation chamber 3 in addition to the treatment of Mars and then mixed with cold air is about 50 ° C - 280 ° C, preferably about 250 ° C; according to actual production needs, other suitable The hot air of temperature.
- the hot blast stove 1 is a chain type hot blast stove or a boiling type hot blast stove.
- the drying system is used to dry and dehydrate the raw coal, reduce the moisture of the raw coal, and the dried coal product is sent to the dry selection system via the dried product transport mechanism.
- the core equipment of the drying system is a vibrating mixed flow dryer.
- the dried product transport mechanism shown in Figure 1 is a dry product belt conveyor 6 .
- the dust removal and exhaust system is used for the recovery of fine coal dust.
- the dust removal and exhaust system includes a dust collector 7 and an exhaust fan.
- the dust removal and exhaust system is connected between the drying system and the dry selection system.
- the exhaust fan is composed of an induced draft fan 8 and an exhaust pipe. 9 composition.
- the dust remover 7 shown in Fig. 1 uses a bag filter.
- the dry selection system includes a dry sorter 12, a circulation fan, and a cyclone 11 for separating the dried raw coal into clean coal, medium coal, and vermiculite.
- the dry sorter 12 in the dry selection system is a composite dry coal separator.
- Dry dry selection combined with raw coal upgrading method includes the following steps:
- coal supply system to provide coal for dry coal supply and hot blast stove; crush and transport low-quality raw coal through coal supply system, and dry coal source with coal size greater than 8mm and less than 50mm after crushing is sent to the drying system via raw coal belt conveyor 2 After the crushing, the coal has a coal particle size of less than 8 mm and is sent to the hot air furnace 1 .
- the hot blast stove 1 is divided into a chain type hot blast stove and a boiling type hot blast stove.
- the low calorific value of the raw coal is more than 16000 kJ/kg, that is, about 3840 kcal/kg, it is directly used as a fuel for the chain type hot blast stove; when the low calorific value of the raw coal is less than At 16000 kJ/kg, a boiling hot blast stove is used as the hot blast stove for the coal supply system.
- the flue gas generated in the hot blast stove 1 is subjected to the process of removing the Mars and then mixed with the cold air to become a hot air of about 150-280 ° C, which is pressurized by the first main fan 4
- the lower portion of the dryer 5 in the drying system is given; the hot air system is also referred to as a heat source system in FIG.
- the drying system uses a vibrating mixed-flow dryer, the coal flow flows from the top to the bottom through a multi-layer vibrating bed to the coal outlet, and the hot air passes through the upper row of the multi-layer vibrating bed from bottom to top.
- the gas port is discharged, and the macroscopic flow between the coal stream and the hot air is countercurrent, that is, there is a vertical cross flow of coal and hot air inside the dryer 5, and a horizontal backflow of coal and hot air.
- Dust removal by dust removal and exhaust system is composed of a dust remover 7 and an exhaust fan.
- the dust remover 7 separates the coal powder in the exhaust gas and merges it into the product coal.
- the treated clean exhaust gas is exhausted through the exhaust fan. .
- the technical advantages of the present invention are: the hot flue gas generated in the hot blast stove 1 is removed from the marshall through the settling chamber 3, and is fed from the lower portion of the dryer 5 by the first main blower 4, and the raw coal material of the raw coal is taken from the raw coal belt conveyor 2 It is transported from the top of the dryer 5, and after the wet raw coal material is uniformly dried, most of it is output from the lower part of the dryer 5 by the dried product belt conveyor 6, and a part of the fine material enters the bag filter 7 with the hot air flow, and the bag type dust remover 7 The separated material is recovered as a product, and the exhaust gas is discharged from the exhaust pipe 9 via the induced draft fan 8.
- the dried coal product is sent to the dry sorter 12 by the dry-selected coal belt conveyor 15 for sorting.
- the clean coal and vermiculite are respectively output from the clean coal belt conveyor 13 and the vermiculite belt conveyor 14.
- the second main fan 10 provides the air volume required for sorting by the dry sorter 12, and the cyclone 11 is connected in series with the second main fan 10 to remove coarser particulate coal dust to protect the fan impeller from being worn; the bag filter 7 and the cyclone
- the dust collectors 11 are connected in parallel to ensure that the dust concentration of the gas discharged into the atmosphere is lower than the national standard, and the air is directly sucked from the periphery of the dry sorter 12 to form a negative pressure operation, thereby improving the sorting efficiency of the dry sorter 12.
- the first choice after drying and drying is not the only option. If the raw coal has a high vermiculite content and the surface moisture (visible moisture) is not high, the dry selection operation can be performed. The user should give priority to the dry selection process. Under the same investment conditions, the first dry selection scheme is to remove the amount of dryness after removing the vermiculite, and improve the yield of the upgraded coal than the first drying scheme.
- the investment can be reduced by about 30%. If the surface moisture of the raw coal is too high or the vermiculite content is not high, the dry selection operation cannot be carried out without drying, then only the first choice after drying and drying is selected. For the simplification of the present invention, other applicable materials or components or process improvements are not listed here.
- the apparatus and method of the invention not only organically combines the dry coal preparation and drying processes, but also exerts the respective advantages of drying and dry selection, and expands the application range of the equipment, has low investment, low production cost, and is convenient for coal extraction. Promotion and application of quality technology.
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/510,642 US8739975B2 (en) | 2009-11-19 | 2010-11-19 | Integrated drying and dry separation apparatus for upgrading raw coal and method thereof |
UAA201207488A UA105079C2 (uk) | 2009-11-19 | 2010-11-19 | Комплексна установка сушіння й сухого розділення для збагачення сирового вугілля й спосіб з її використанням |
PL400390A PL230124B1 (pl) | 2009-11-19 | 2010-11-19 | Zintegrowana aparatura susząca i sortująca na sucho do wzbogacania surowego węgla oraz sposób wzbogacania węgla |
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CN200910223760.8A CN101705131B (zh) | 2009-11-19 | 2009-11-19 | 一种干燥干选联合原煤提质设备及方法 |
CN200910223760.8 | 2009-11-19 |
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PCT/CN2010/001858 WO2011060620A1 (zh) | 2009-11-19 | 2010-11-19 | 一种干燥干选联合原煤提质设备及方法 |
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US (1) | US8739975B2 (zh) |
CN (1) | CN101705131B (zh) |
PL (1) | PL230124B1 (zh) |
UA (1) | UA105079C2 (zh) |
WO (1) | WO2011060620A1 (zh) |
Cited By (1)
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- 2010-11-19 WO PCT/CN2010/001858 patent/WO2011060620A1/zh active Application Filing
- 2010-11-19 UA UAA201207488A patent/UA105079C2/uk unknown
- 2010-11-19 PL PL400390A patent/PL230124B1/pl unknown
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Also Published As
Publication number | Publication date |
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CN101705131B (zh) | 2012-09-05 |
US8739975B2 (en) | 2014-06-03 |
PL230124B1 (pl) | 2018-09-28 |
PL400390A1 (pl) | 2013-01-21 |
CN101705131A (zh) | 2010-05-12 |
US20120228197A1 (en) | 2012-09-13 |
UA105079C2 (uk) | 2014-04-10 |
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