CN103160300A - Modification quality upgrading system of brown coal - Google Patents
Modification quality upgrading system of brown coal Download PDFInfo
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- CN103160300A CN103160300A CN2013100711032A CN201310071103A CN103160300A CN 103160300 A CN103160300 A CN 103160300A CN 2013100711032 A CN2013100711032 A CN 2013100711032A CN 201310071103 A CN201310071103 A CN 201310071103A CN 103160300 A CN103160300 A CN 103160300A
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Abstract
The invention relates to a modification quality upgrading system of brown coal, which belongs to a brown coal quality upgrading apparatus, and solves the problem that current modification quality upgrading system removes pollutants such as sulfur and mercury with low efficiency, and generated contamination gas and dust are failed to obtain effective treatment. The modification quality upgrading system also solves the problem of ineffective utilization of boiler tail gas. The modification quality upgrading system comprises an original coal bunker, a feeding apparatus, a fluidization pyrolysis apparatus, a constant flow pump, a vertical pipeline, a first-grade quality upgrading coal bunker, a horizontal pipeline, a cyclone separator, a secondary-grade coal bunker, a gas purifying apparatus and an induced draught fan. According to the invention, brown coal in the original coal bunker is predried through flue gas, and is sent to the fluidization pyrolysis apparatus through the feeding apparatus for pyrolysis quality upgrading, the coal after quality upgrading can be separated and collected through two-grade quality upgrading coal bunkers and the cyclone separator, the pyrolysis flue gas flows through the gas purifying apparatus and is introduced in the original coal bunker as a heat source for predrying and dehydrating of raw coal. The modification quality upgrading system of brown coal has the advantages of high reliability and strong coal adaptability, enhance the quality of the quality upgraded coal, and increase the cooperation removal efficiency of the pollutants such as sulfur and mercury.
Description
Technical field
The invention belongs to the brown coal device for improving quality, be specifically related to a kind of brown coal modification upgrading system, be used for low pollution of high-efficiency cleaning and utilize brown coal.
Background technology
Coal is the main available fossil energy of China.Fast development along with economy, the high-quality coal resource is fewer and feweri, the utilization that accounts for the lower lignite resource of the degree of coalification of coal in China total reserves 13% comes into one's own day by day, but the moisture of brown coal is high up to 20-60%, volatile content, the easy-weathering spontaneous combustion, be unfavorable for long-distance transportation, the efficient of directly using is low; China's lignite resource mainly is distributed in east Inner Mongolia and Yunnan Province in addition, and the coal resources of economically developed coastland lack, and the long-distance transportation brown coal can cause transport power waste, and easily spontaneous combustion and produce safety problem in transportation of brown coal; The objectionable impuritiess such as the oxysulfide of coal burning process discharging simultaneously and mercury can cause such as serious environmental problems such as acid rains, and the carbonic acid gas of a large amount of dischargings also can aggravate Greenhouse effect.Therefore study modification upgrading before the burning of brown coal, reduce brown coal moisture, improve thermal value, remove the pollutents such as sulphur and mercury, utilize and even whole society's energy-saving and emission-reduction have important impact for low pollution of the high-efficiency cleaning of brown coal.Be called upgraded coal by the brown coal that obtain after upgrading.
Present brown coal upgrading technology both domestic and external mainly contains moulding upgrading, non-evaporating dehydrolysis upgrading, pyrolysis upgrading three types of technology: the representative of moulding upgrading technology has the punch forming process of Germany and the hot-forming process for upgrading of domestic Shenhua Group; The representative of non-evaporating dehydrolysis upgrading technology has the K-fuel engineering of the U.S. and the UBC technique of Japan; The representative of pyrolysis upgrading technology has the strange three sections stove low temperature pyrogenation techniques in Shandong of Germany and the multistage rotary kiln technique of Chinese coal scientific research total institute; See Shao person of outstanding talent: " the brown coal upgrading state of the art and China's brown coal upgrading technology trends pre-test ", Shenhua science and technology, 2009,7 (2): 17-22.
Domestic brown coal process for upgrading, just promotes on technology and equipment with still having very large gap abroad in recent years to some extent because development course is shorter.domestic existing rotary kiln dehumidification system affects heat-transfer effect because gas-solid contact is bad, vibrated fluidized bed pyrolysis process for upgrading is complicated, very high to equipment requirements, existing brown coal upgrading system biases toward the pollutent that removes moisture as far as possible and produce in less concern upgrading process, the open date is on September 10th, 2008, publication number is that the Chinese patent of CN101260307A discloses " a kind of brown coal drying and upgrading device and processing method ", the open date is on October 3rd, 2012, publication number is that the Chinese utility model patent of CN202465597U discloses " a kind of fluidized bed coal pyrolysis installation ", both do not pay close attention to the pollutents such as sulphur mercury that produce in pyrolysis upgrading process, smoke eliminator is not set yet, may cause environmental pollution.
Summary of the invention
The invention provides a kind of brown coal modification upgrading system, solve the existing efficient that removes the pollutents such as sulphur in brown coal, mercury of existing brown coal modification upgrading system lower, the problem that the pollution gas that produces in brown coal upgrading process and dust fail to be effectively addressed, solve simultaneously the problem that the heat of boiler exhaust gas fails to be utilized effectively, develop with the high-efficiency low-pollution of realizing lignite resource.
A kind of brown coal modification upgrading system provided by the present invention comprises run coal bin, feeding device, fluidisation pyrolysis installation, and described run coal bin, feeding device are connected with the fluidisation pyrolysis installation and are connected by pipeline, it is characterized in that:
Described fluidisation pyrolysis installation is made of resistance heading furnace, closed box and air distribution plate, described closed box is positioned at resistance heading furnace, left side, described closed box upper surface has opening for feed, closed box bottom surface right side has the discharging venting port, and described closed box left end pars intramuralis is connected with the air distribution plate support below opening for feed; Described air distribution plate is made of metal perforated plate 3-3-2 and its surperficial metal gauze 3-3-1 of covering, the air distribution plate left end is by the air distribution plate stent support, the air distribution plate right-hand member is supported by the right-hand member wall of closed box, make air distribution plate be inclined between the interior opening for feed of described closed box and discharging venting port, will be divided into upper space and lower space in closed box; Bottom, described closed box left side has liquid inlet, and under the front and back sidewall correspondence of described closed box, the position, space has a plurality of equally distributed inlet mouths; Described liquid inlet is by constant flow pump and pipeline connecting fluid body source, and described inlet mouth connects gas source by pipeline;
The discharging venting port of described fluidisation pyrolysis installation connects one-level upgrading coal bunker by vertical ducting, described vertical ducting sidewall connects cyclonic separator by horizontal pipe, the discharge port of described cyclonic separator connects secondary upgrading coal bunker, the venting port of described cyclonic separator connects the inlet mouth of gas-cleaning installation by pipeline, the air outlet of described gas-cleaning installation is connected to the bottom of run coal bin by induced draft fan and pipeline.
Described brown coal modification upgrading system is characterized in that: the liquid in described fluid supply is water, ethanol or methyl alcohol; Gas in described gas source is the gas mixture of boiler tail flue gas, air, carbonic acid gas, carbonic acid gas and oxygen mixture, nitrogen or nitrogen and oxygen.
Use the present invention to carry out brown coal modification upgrading, its process is: (1) brown coal predrying carrying out in run coal bin sent into feeding device after first step dehydration upgrading; (2) by feeding device, brown coal are sent into the fluidisation pyrolysis installation and carry out the modification upgrading, then most of upgraded coal will enter one-level upgrading coal bunker, and all the other upgraded coal are carried by gas and entered cyclonic separator; The upgraded coal of (3) separating through cyclonic separator enters secondary upgrading coal bunker, and tail gas enters gas-cleaning installation and removes dust and gas pollutant; (4) induced draft fan is discharged after the tail gas in gas-cleaning installation is sent into run coal bin as the predrying thermal source of raw coal.
In the present invention, the fluidisation pyrolysis installation can be controlled pyrolysis temperature by resistance heading furnace, can change by the height of regulating the air distribution plate support air distribution plate angle of inclination and control the reaction times, thereby improve heat exchange efficiency and coal adaptability; Two-stage upgrading coal bunker can be alleviated the wearing and tearing to cyclonic separator; Can input different liqs with constant flow pump and make different atmosphere, improve brown coal quality and pollutant removing efficient; The gas source of fluidisation pyrolysis installation can adopt has certain temperature boiler of power plant tail gas, and the flue gas that produces after upgrading reuses after purifying, not only economy but also environmental protection; Do not need vibrating device, reduced and made the operation difficulty, can make that system is more stable, safety; Can large-scale promotion use, realize that the high-efficiency low-pollution of lignite resource develops.
Description of drawings
Fig. 1 is structural representation of the present invention, mark in figure: run coal bin 1, feeding device 2, fluidisation pyrolysis installation 3, constant flow pump 4, vertical ducting 5, one-level upgrading coal bunker 6, horizontal pipe 7, cyclonic separator 8, secondary upgrading coal bunker 9, gas-cleaning installation 10, induced draft fan 11.
Fig. 2 is fluidisation pyrolysis installation structural representation, mark in figure: resistance heading furnace 3-1, closed box 3-2, closed box upper surface 3-2-1, closed box bottom surface 3-2-2, air distribution plate 3-3, metal perforated plate 3-3-2, metal gauze 3-3-1, opening for feed 3-4, discharging venting port 3-5, air distribution plate support 3-6, liquid inlet 3-7, inlet mouth 3-8.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
As shown in Figure 1, embodiments of the invention comprise run coal bin 1, feeding device 2, fluidisation pyrolysis installation 3, constant flow pump 4, vertical ducting 5, one-level upgrading coal bunker 6, horizontal pipe 7, cyclonic separator 8, secondary upgrading coal bunker 9, gas-cleaning installation 10 and induced draft fan 11; Described run coal bin 1, feeding device 2 are connected with the fluidisation pyrolysis installation and are connected by pipeline successively;
As shown in Figure 2, described fluidisation pyrolysis installation 3 is made of resistance heading furnace 3-1, closed box 3-2 and air distribution plate 3-3, described closed box 3-2 is positioned at resistance heading furnace 3-1, described closed box upper surface 3-2-1 left side has opening for feed 3-4, closed box bottom surface 3-2-2 right side has discharging venting port 3-5, and described closed box 3-2 left end pars intramuralis is connected with air distribution plate support 3-6 below opening for feed 3-4; Described air distribution plate 3-3 is made of metal perforated plate 3-3-2 and its surperficial metal gauze 3-3-1 of covering, air distribution plate 3-3 left end is supported by air distribution plate support 3-6, air distribution plate 3-3 right-hand member is supported by the right-hand member wall of closed box 3-2, make air distribution plate 3-3 be inclined between the interior opening for feed 3-4 of described closed box 3-2 and discharging venting port 3-5, will be divided into upper space and lower space in closed box; Bottom, described closed box 3-2 left side has liquid inlet 3-7, and under the front and back sidewall correspondence of described closed box 3-2, the position, space has a plurality of equally distributed inlet mouth 3-8;
As shown in Figure 1 and Figure 2, described liquid inlet 3-7 is by constant flow pump 4 and pipeline connecting fluid body source, and described inlet mouth 3-8 connects gas source by pipeline; The discharging venting port 3-5 of described fluidisation pyrolysis installation 3 connects one-level upgrading coal bunker 6 by vertical ducting 5, described vertical ducting 5 sidewalls connect cyclonic separator 8 by horizontal pipe 7, the discharge port of described cyclonic separator 8 connects secondary upgrading coal bunker 9, the venting port of described cyclonic separator 8 connects the inlet mouth of gas-cleaning installation 10 by pipeline, the air outlet of described gas-cleaning installation 10 is connected to run coal bin 1 bottom by induced draft fan 11 and pipeline.
in the present embodiment, feeding device 2 adopts the LS type screw feeder of Xinxiang City permanent far vibrating machine company limited, constant flow pump 4 adopts the HL-5 numerical display type constant flow pump of Shanghai Hu Xi Analytical Instrument Co., Ltd, cyclonic separator 8 adopts the steel bypass type cyclonic separator of Nanjing Shou Wang mechanical means company limited, gas-cleaning installation 10 adopts the SF type water desulfurizing-dusting device of pool, Jiangsu inscription Genie et Environnement, resistance heading furnace adopts the Yingshan Mountains, Hubei to build the SX2 molding box formula resistance furnace of power electric furnace Manufacturing Co., Ltd, induced draft fan 11 adopts pool, Zibo to send out the Y5-47 boiler induced-draft fan of blower fan company limited,
In the present embodiment, fluid supply adopts ethanol, and gas source adopts nitrogen; Infusion fluid, do not adopt boiler tail flue gas as gas source.
the technical process of these brown coal modification upgrading system is: the brown coal that water content is high are sent into run coal bin 1 by coal conveyer belt, the bottom of run coal bin 1 continues to pass into the flue gas that pyrolysis produces and carries out first step drying, remove free moisture, then pre-dried brown coal are transported on the air distribution plate 3-3 of fluidisation pyrolysis installation 3 by feeding device 2, carry out second stage pyrolysis upgrading, the nitrogen of sending into by inlet mouth 3-8 mixes in the lower space of fluidisation pyrolysis installation 3 with the ethanol (can gasify under high temperature) that constant flow pump 4 is sent into, then pass air distribution plate 3-3, the angle of inclination of air distribution plate 3-3 is between 1 °～10 ° (relative closure casing bottom surface), brown coal on air distribution plate 3-3 flow to discharging venting port 3-5 from top to bottom under the buoyancy acting in conjunction of gravity and air-flow at this moment, most of upgraded coal that particle is larger can directly enter one-level upgrading coal bunker 6 under action of gravity, the less upgraded coal of all the other particles with air-flow carry enter separate in cyclonic separator 8 after, collect in secondary upgrading coal bunker 9, flue gas after separation enters in gas-cleaning installation 10 and removes sulfur-bearing, contaminant gases and the dust such as mercurous, still have the flue gas of certain temperature to send in run coal bin 1 under the effect of induced draft fan 11 after purification, brown coal are carried out first step drying and dehydrating.
The thermal source of fluidizer is provided by resistance heading furnace 3-1, pyrolysis temperature can be adjusted to 1000 ℃ from room temperature, can regulate its temperature according to Coal rank type and the temperature that enters the gas of fluidisation pyrolysis installation, in these brown coal upgrading system, operated by rotary motion is in 150-600 ℃ of scope.Temperature of reaction that in process of production can be by regulating resistance process furnace 3-1, the delivery rate of feeding device 2, control the infusion fluid kind of constant flow pump 4 and send into that gas with various is made different upgrading atmosphere, four conditions such as angle of changing air distribution plate 3-3 improve the adaptability to Coal rank, increase sulfur-bearing, contain the removal efficiency of mercury contaminants and dust, and further improve the utility value of brown coal.
Claims (2)
1. brown coal modification upgrading system, comprise run coal bin (1), feeding device (2), fluidisation pyrolysis installation (3), described run coal bin (1), feeding device (2) are connected 3 with the fluidisation pyrolysis installation) connect by pipeline successively, it is characterized in that:
Described fluidisation pyrolysis installation (3) is made of resistance heading furnace (3-1), closed box (3-2) and air distribution plate (3-3), described closed box (3-2) is positioned at resistance heading furnace (3-1), left side, described closed box upper surface (3-2-1) has opening for feed (3-4), closed box bottom surface (3-2-2) right side has discharging venting port (3-5), and described closed box (3-2) left end pars intramuralis is connected with air distribution plate support (3-6) below opening for feed (3-4); Described air distribution plate (3-3) is by metal perforated plate (3-3-2) and cover its surperficial metal gauze (3-3-1) formation, air distribution plate (3-3) left end is supported by air distribution plate support (3-6), air distribution plate (3-3) right-hand member is supported by the right-hand member wall of closed box (3-2), make air distribution plate (3-3) be inclined between the interior opening for feed of described closed box (3-2) (3-4) and discharging venting port (3-5), will be divided into upper space and lower space in closed box; Described closed box (3-2) bottom, left side has liquid inlet (3-7), and under the front and back sidewall correspondence of described closed box (3-2), the position, space has a plurality of equally distributed inlet mouths (3-8); Described liquid inlet (3-7) is by constant flow pump (4) and pipeline connecting fluid body source, and described inlet mouth (3-8) connects gas source by pipeline;
the discharging venting port (3-5) of described fluidisation pyrolysis installation (3) connects one-level upgrading coal bunker (6) by vertical ducting (5), described vertical ducting (5) sidewall connects cyclonic separator (8) by horizontal pipe (7), the discharge port of described cyclonic separator (8) connects secondary upgrading coal bunker (9), the venting port of described cyclonic separator (8) connects the inlet mouth of gas-cleaning installation (10) by pipeline, the air outlet of described gas-cleaning installation (10) is connected to bottom run coal bin (1) by induced draft fan (11) and pipeline.
2. brown coal modification upgrading system as claimed in claim 1 is characterized in that: the liquid in described fluid supply is water, ethanol or methyl alcohol; Gas in described gas source is the gas mixture of boiler tail flue gas, air, carbonic acid gas, carbonic acid gas and oxygen mixture, nitrogen or nitrogen and oxygen.
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Cited By (3)
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| CN104437879A (en) * | 2014-09-30 | 2015-03-25 | 西安科技大学 | Modification pretreatment method used for sorting coal rock components |
| CN108659873A (en) * | 2018-07-19 | 2018-10-16 | 天津科技大学 | Continuous biomass fast thermal decomposition device |
| CN114606024A (en) * | 2020-12-07 | 2022-06-10 | 镇雄县久源煤矿有限责任公司 | Device and method for gas-solid cold state separation in pulverized coal pyrolysis |
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| CN108659873A (en) * | 2018-07-19 | 2018-10-16 | 天津科技大学 | Continuous biomass fast thermal decomposition device |
| CN114606024A (en) * | 2020-12-07 | 2022-06-10 | 镇雄县久源煤矿有限责任公司 | Device and method for gas-solid cold state separation in pulverized coal pyrolysis |
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