CN1058463A - High concentration, high viscosity coal washing mud are carried the feed method and system - Google Patents

High concentration, high viscosity coal washing mud are carried the feed method and system Download PDF

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Publication number
CN1058463A
CN1058463A CN 91104578 CN91104578A CN1058463A CN 1058463 A CN1058463 A CN 1058463A CN 91104578 CN91104578 CN 91104578 CN 91104578 A CN91104578 A CN 91104578A CN 1058463 A CN1058463 A CN 1058463A
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CN
China
Prior art keywords
concentration
pump
viscosity
coal washing
washing mud
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Pending
Application number
CN 91104578
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Chinese (zh)
Inventor
岑可法
倪明江
杨家林
吕荣
蒋旭光
黄国权
严建华
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Zhejiang University ZJU
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Zhejiang University ZJU
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Publication date
Application filed by Zhejiang University ZJU filed Critical Zhejiang University ZJU
Priority to CN 91104578 priority Critical patent/CN1058463A/en
Publication of CN1058463A publication Critical patent/CN1058463A/en
Pending legal-status Critical Current

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Abstract

The invention discloses the conveying feed method and system of a kind of high concentration, high viscosity coal washing mud.Its method is: regulating, screen, stir into solid contents by moisture is 60~72%, and viscosity is high concentration, the high viscosity coal washing mud of 50~10000 pools, carries with pump and pipeline, directly feeds in the stove through dispenser.Its system is: it has moisture adjusting device, wet pulp vibratory sieve, agitator, bin, delivery pump, anti-blocking tube coupling, manometer, conveyance conduit, broach hopper, material loading feed pump, material loading pipeline, dispenser.Adopt equipment required for the present invention succinct, investment obviously reduces, and is easy and simple to handle.

Description

High concentration, high viscosity coal washing mud are carried the feed method and system
The invention belongs to high concentration, high viscosity coal washing mud conveying feed method and system.
Here the high concentration that refers to be solid contents account for weight ratio 60~70%, high viscosity is a range of viscosities at the coal washing mud of 50~10000 pools, form becomes starchiness, it is to concentrate the back emission from the coal washery by press filtration.Coal slime according to foreign literature report 50% above moisture has the pump of employing and pipeline to carry.And its fluid behaviour of the coal slime of 28~40% moisture is a non-newtonian fluid, and concentration height, viscosity are difficult to adopt pump and pipeline to be carried greatly.
The solids of coal slime mainly is made up of fine particulate coal and clay, sandstone less than the 1mm particle diameter in addition, and the fine powder of 0.07~0.2mm accounts for more than 80% of component gross weight.The low heat value of this coal slime is generally in 12000 kJ (kilojoule)s/below the kilogram.In the past all as the offal treatment of coal tailing and coal washery, contaminated environment, waste energy.Research application success along with coal washing mudflow fluidized bed boiler combustion technology, comprehensive utilization coal washing mud power generation and heat supply has far-reaching promotion prospect, will produce great economic and social benefit, yet how coal washing mud is transported to the boiler room from coal washery press filtration workshop discharging, again it is risen to the boiler top from boiler bottom then, after charging gear feed in the boiler.The employing mechanical transport and the feed-type that have at present.Promptly be transported on the boiler and feed in the stove by the batcher extrusion modling again by belt feeder scraper plate machine, this class mode cost of investment height, operating cost is big, safeguards heavyly, and operating personnel are many, and working environment is dirty also not too reliable.
The conveying feed method and system that the purpose of this invention is to provide a kind of high concentration, high viscosity coal washing mud.
Be illustrated below in conjunction with accompanying drawing.
Accompanying drawing is that high concentration, high viscosity coal washing mud are carried the feed system schematic.
High concentration, high viscosity slime carry feeding method to be by conditioning, to screen, stir Mixing solid contents is 60~72%, and viscosity is high concentration, the high viscosity slime of 50~10000 pools, carries with pump and pipeline, directly feeds in the stove through dispenser. Adopt the high concentration of said method, the conveying feeding system of high viscosity slime. Its workflow is as follows: the coal slime that emits from press filtration workshop slime floss hole 1 is introduced into a moisture adjusting device 2 these devices with forced mixer and injector, moisture of coal fines is adjusted to the scope of suitable pump and pipeline transport viscosity. According to existing several moisture of coal fines generally about 30%, and so that coal slime mix. Just the wet pulp vibratory sieve 3 that is 25~20mm by a mesh size subsequently, sieve goes accident to sneak into the foreign material of coal slime, in case block pumps import and pipeline. Just enter coal slime bin 5, this storage capacity designs by the match condition that boiler uses slime content and press filtration workshop discharge capacity again. Bin must be not uncovered sealing, avoids the moisture evaporation to cause coal slime dry and hard as far as possible, and impact is carried. The coal slime that has according to the difference of various places coal slime component is easy to precipitation from tearing open, can deep layer agitator 4 be installed in the bin bottom when needing, and be beneficial to charging when coal slime because component difference or period of storage stir to mix when crossing discovery precipitation segregation of a specified duration. Delivery pump 6 directly is communicated with bin, and delivery pump does not need speed governing, and the pump type can adopt extrusion pump, piston pump, pulsometer etc. The coal slime that enters delivery pump forms the high pressure discharging under the effect of pump, extrusion pump generally can be up to 2.0MPa, and piston pump also can be higher. Pressure head is selected also can be according to fed distance, coal slime viscosity, and the parameters such as inner diameter of delivery tube are come calculation Design. The coal slime discharging under high pressure enters conveyance conduit 9, many press filtration workshops, newly-built coal washery and boiler room distance is considered for the coal slime comprehensive utilization at present, distance is closer, generally in 150m, like this, it is calculated that fed distance 150m pump discharge pressure 1.5MPa, inner diameter of delivery tube is not more than 150mm, carry 10 tons of slime contents/time, coal slime viscosity can meet design requirement about 100 pools.
In order to prevent unexpected pipe plug phenomenon in the course of conveying, separated by a distance, settle manometer 8 and anti-blocking tube coupling 7. The electric contact pressure meter is counted in pressure measurement, is used for digging the water filling drag reduction at the anti-blocking tube coupling of system place. Pressure gauge pressure transmission structure is oily diaphragm type. Anti-blocking tube coupling is the ring cavity water structure. Coal slime is transported to boiler bottom through pipeline, enters the broach hopper direct-connected with material loading feed pump 11 10 hopper taperings are not more than 40 °, and bucket capacity uses the slime content design by the normal operation of boiler 2 hours. Material loading feed pump adjustable speed, purpose are to feed in the stove through dispenser 13 from the furnace roof feed well according to mentioning the boiler top on the pipeline 12 of coal slime by vertical material loading, turning. For the type of furnace of furnace roof height greater than 20m, should take from the wall perforate of furnace side, boiler middle and upper part, reduce the material loading hoisting depth. High temperature dispenser 13 is installed in perforate is connected with the material loading pipeline, easily make coal slime dry and hard even coking in dispenser because this dispenser directly stretches into upper furnace contact high-temperature flue gas. This dispenser adopts pipe-type water-cooling structure, in case and possess and stop material or the system failure, can be clean with stretching in the furnace wall coal slime water or the steam flush in that section dispenser horizontal tube, in case the hyperthermia radiation coking, so that malfunctioning when again dropping into of feed.
Because the distance and position of each press filtration workshop to boiler room can be different, boiler height and configuration aspects also can be variant, and the installation site between delivery pump and the material loading feed pump 11 can be calculated definite according to coal slime flow duct resistance data.Said system also must complementary pump and the pipeline scavenger circuit in addition, and a pressure head is installed is higher than the low capacity water pump of carrying maximum pressure, is convenient to that system maintenance and pipeline clean and standby during the fault eliminating of necessity.
The boiler room can adopt the conveying feeding system by moisture content adjusting device, wet pulp vibratory sieve, anti-blocking tube coupling, manometer, broach hopper, material loading feed pump, material loading pipeline, dispenser when the coal washing mud press filtration workshop.
Also need to prove the coal slime that above-mentioned involved coal slime is all carried under additive-free or drag reducer condition, according to possible field condition, also can consider to use drag reducer when the coal slime situation is necessary and reduce the concentration range that flow resistance improves the conveying coal slime.
Adopt advantage of the present invention to be: 1. equipment needed thereby is succinct, and investment obviously reduces; 2. easy and simple to handle, safety, operations staff are few; 3. coal slime is carried material loading to be enclosed in and is washed conveniently sanitation and hygiene in the pipeline; 4. feed is regulated, and the volume characteristic is good, the stable control that accurately helps combustion conditions; 5. system reduces from power consumption, and operating cost is few.

Claims (4)

1, the conveying feeding method of a kind of high concentration, high viscosity coal washing mud, it is characterized in that regulating, screen, stir into solid contents by moisture content is 60~72%, viscosity is high concentration, the high viscosity coal washing mud of 50~10000 pools, carry with pump and pipeline, carry feeding method through the coal washing mud that dispenser directly feeds in the boiler.
2, a kind of high concentration of said method, high viscosity coal washing mud of adopting is carried feeding system, it is characterized in that it has moisture adjusting device (2), wet pulp vibratory sieve (3), agitator (4), bin (5), delivery pump (6), anti-blocking tube coupling (7), manometer (8), conveyance conduit (9), broach hopper (10), material loading feed pump (11), material loading pipeline (12), dispenser (13).
3, a kind of high concentration of said method, conveying feeding system of high viscosity coal washing mud of adopting, it has moisture adjusting device (2), wet pulp vibratory sieve (3), anti-blocking tube coupling (7), manometer (8), broach hopper (10), material loading feed pump (11), material loading pipeline (12), dispenser (13).
4, according to claim 2 or the 3 described a kind of high concentration of said method, conveying feeding systems of high viscosity coal washing mud of adopting, it is characterized in that said dispenser adopts the high temperature dispenser, said delivery pump, feeding pump adopt extrusion pump.
CN 91104578 1991-07-02 1991-07-02 High concentration, high viscosity coal washing mud are carried the feed method and system Pending CN1058463A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 91104578 CN1058463A (en) 1991-07-02 1991-07-02 High concentration, high viscosity coal washing mud are carried the feed method and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 91104578 CN1058463A (en) 1991-07-02 1991-07-02 High concentration, high viscosity coal washing mud are carried the feed method and system

Publications (1)

Publication Number Publication Date
CN1058463A true CN1058463A (en) 1992-02-05

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Application Number Title Priority Date Filing Date
CN 91104578 Pending CN1058463A (en) 1991-07-02 1991-07-02 High concentration, high viscosity coal washing mud are carried the feed method and system

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CN (1) CN1058463A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1308200C (en) * 2002-08-13 2007-04-04 北京中矿机电工程技术研究所 Method of conveying coal sludge via high pressure pipeline
CN101871651A (en) * 2010-06-29 2010-10-27 北京中矿环保科技股份有限公司 Method and device for cleanly storing and feeding coal slurry fuel of electric power plant
CN103557518A (en) * 2013-10-14 2014-02-05 上海交通大学 Organic working medium boiler for coal washery sludge combustion
CN103604119A (en) * 2013-11-28 2014-02-26 山东科技大学 Circulating fluidized bed overgrate air distribution method and special-purpose boiler
CN103819067A (en) * 2014-02-24 2014-05-28 淮安市苏通市政机械有限公司 Extrusion charging vehicle for biogas digester
CN105819231A (en) * 2016-03-28 2016-08-03 徐州工业职业技术学院 Pipeline conveying method and device for gas-making wet coal ash

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1308200C (en) * 2002-08-13 2007-04-04 北京中矿机电工程技术研究所 Method of conveying coal sludge via high pressure pipeline
CN101871651A (en) * 2010-06-29 2010-10-27 北京中矿环保科技股份有限公司 Method and device for cleanly storing and feeding coal slurry fuel of electric power plant
CN103557518A (en) * 2013-10-14 2014-02-05 上海交通大学 Organic working medium boiler for coal washery sludge combustion
CN103557518B (en) * 2013-10-14 2016-02-10 上海交通大学 The organic working medium boiler of slime burning
CN103604119A (en) * 2013-11-28 2014-02-26 山东科技大学 Circulating fluidized bed overgrate air distribution method and special-purpose boiler
CN103604119B (en) * 2013-11-28 2016-06-08 山东科技大学 Circulating fluidized bed secondary air joins wind method and boiler dedicated
CN103819067A (en) * 2014-02-24 2014-05-28 淮安市苏通市政机械有限公司 Extrusion charging vehicle for biogas digester
CN103819067B (en) * 2014-02-24 2015-05-13 淮安市苏通市政机械有限公司 Extrusion charging vehicle for biogas digester
CN105819231A (en) * 2016-03-28 2016-08-03 徐州工业职业技术学院 Pipeline conveying method and device for gas-making wet coal ash

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