CN204352650U - Black water tandem system - Google Patents

Black water tandem system Download PDF

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Publication number
CN204352650U
CN204352650U CN201420782228.6U CN201420782228U CN204352650U CN 204352650 U CN204352650 U CN 204352650U CN 201420782228 U CN201420782228 U CN 201420782228U CN 204352650 U CN204352650 U CN 204352650U
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China
Prior art keywords
coal
water
concentration basin
black water
slime
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Expired - Fee Related
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CN201420782228.6U
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Chinese (zh)
Inventor
彭祖均
王小明
王永胜
黄伟
邹勇
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Sichuan Bamboo Coal (group) Co Ltd Slate Coal Preparation Plant
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Sichuan Bamboo Coal (group) Co Ltd Slate Coal Preparation Plant
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Priority to CN201420782228.6U priority Critical patent/CN204352650U/en
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Publication of CN204352650U publication Critical patent/CN204352650U/en
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Abstract

The utility model discloses a kind of black water tandem system, belong to drying slime technical field.Treatment system comprises: concentration basin, Pulp pump, precipitator tower, pan feeding pump, quick-opening press filter and tail coal scraper plate, the said equipment connects successively.The utility model power consumption obviously reduces, and material consumption obviously reduces, and plant maintenance workload significantly reduces, and avoids and causes coal washing stoppage in transit phenomenon to occur because tail coal reclaims; Concentration basin underflow achieves continuous blow-down, has stopped the generation of pressing rake accident.Tail coal reclaims ability and improves 15%.Improve running efficiency of system, decrease labo r usage; Decrease number of devices, eliminate tailing pit and mine tailing agitator.

Description

Black water tandem system
Technical field
The utility model relates to colliery treatment technology, especially drying slime process, belongs to drying slime technical field.
Background technology
The country of China's to be one with coal be main energy sources, accounts for about 70% in disposable energy resource structure.Along with the development of clean coal technology, the selected amount of coal reaches more than 50%, particularly in coal in China reserves, 27.6% of coal resources in China total amount is only accounted for as the bottle coal of coal for coking, rich coal, coking coal and lean coal total amount, especially in coking, play skeleton function rich coal and coking coal only account for 10.5%, in addition most of fertilizer, coking coal ash content and sulphur content is higher, washability is poor, clean coal recovery generally only 30 ~ 60%, very rare preciousness.
For coking coal cleans, most raw coal all needs to process, and wherein most of coal preparation plant take water as medium, especially at wet coal preparation as in dense medium, jigging, flowing current separation, flotation and desliming, hydraulic classiciation process, water is obligato especially.It is no matter the wash water as separating medium, or as the water spray of desliming and the transport of water of flushing chute, except supplementary part to be taken away with product and natural evaporation and except the water yield of losing in the course of work, most water all will at round-robin after treatment.Namely these process waters recycled in washing flow process are called recirculated water.In wet coal preparation, the operations such as coal classification, desliming, selected, dehydration divide product of hanking, wherein greatly coal slime is taken away (being mainly cleaned coal to be taken away) by product, but still have many coal slimes to be mixed in process water, these flow through each operation of coal separation flow process, and the process water being mixed into coal slime is called black water.
In order to effectively reclaim valuable mineral resources, eliminating plant emissions to the pollution of environment, saving water for industrial use, must process the black water of coal preparation plant.The substance of slime water treatment comprises two parts: from black water, isolate solids to greatest extent, to obtain the circulation of satisfactory separating medium---water, and this step is called wash water clarification and slime water concentration; Part II is exactly coal slime process.Coal slime process is divided into again coarse grain slime recovery and fine slime process.Slime water treatment is extremely complexity and a very important job during coal separation is produced, and is also the important symbol weighing coal preparation plant management level.
Realize the final goal that Washing Water Close-Cycling in Preparation Plant is black water management.Rational black water flow process is that coal preparation plant realizes closed water circuit and provides technology and ensure, but finally will realize this goal and be also faced with very difficult task, will reach washing water density exactly.Here existing have complicated technical problem to have again careful production management work.Visible, the slime water system of coal preparation plant be problem at most, the most scabrous link.Many coal preparation plants produce abnormal, and its problem all goes out in slime water treatment link.
At present, generally common process is adopted: enter concentration basin and precipitator tower respectively by black water with the coal preparation plant of concentration basin and precipitator tower process black water, its underflow reclaims coal slime respectively by filter press, and overflow recycles as recycled water, and the method for operation is (see figure 2) in parallel.
Although this technique can reach the object of sedimentation black water, but the filter press of contrast concentration basin underflow and precipitator tower underflow enters to press effect, find into filter press pan feeding deficient in stability during pressure concentration basin underflow, show as that filter press feed thickness is low, tail coal is long for return period, coal washing After Hours wants time delay to reclaim coal slime 2 ~ 4 hours, particularly when concentration basin centre bore accumulates coal slime, tail coal is longer for return period, affects normally carrying out of coal washing production.Problems existing mainly contains:
1, the existing method of operation easily causes (slightly) coal slime to accumulate near thickener centre bore, causes raker thickener operation troubles
In dense-medium separation production process, when the equipment such as concentrate cyclone group, high-frequency screen, vibration sieve bend, coal slime centrifuge, inclined-plate clarifying basin of coarse slime recovery system is once occur " running thick ", coarse granule material all imports thickener.
When thickener underflow coarseness material content is higher or when underflow density is bigger than normal, carry out discontinuous discharge because of concentration basin underflow pump to run, very easily cause concentration basin underflow pump to block, cause material to gather at thickener underflow mouth, part is deposited on thickener rabbling mechanism simultaneously.After coal slime is gathered, thickener walking pressure increase, even can automatic stopping or occur pressure rake phenomenon, cause slime water system vicious circle.Simultaneously because the coal slime around thickener centre bore is gathered, underflow density can be caused very to attend the meeting lower at below 300g/l, the single circulation and stress time lengthens, and has a strong impact on the recovery of tail coal, as reclaimed not in time, causes slime water system vicious circle equally.
2, cause Circulation water density unstable
Consult Design for Coal Preparation Plant handbook, φ 24m concentration basin and φ 12m precipitator tower slime water treatment amount can at 1450m 3/ h, and slabstone coal separation power plant produce in the coal slime water yield at 1250 m 3/ h, although safety coefficient is not high, should be able to meet Production requirement.In actual production process, the concentration basin Circulation water density most of the time can control at below 30g/ l, but concentration basin can be interrupted appearance race " Heisui River " phenomenon, containing the high grey carefully mud of part in the recirculated water returned.The high separating effect of coal that can make of Circulation water density is deteriorated, and can cause the consequences such as separating density is unstable, flotation froth is clamminess, cleans ash uprises.Analyze reason mainly, when concentration basin underflow discharge is not smooth, when coal slime is gathered more in pond, black water settling height is shorter, and should there be enough height in concentration basin free settling district, part coal slime has little time sedimentation and enters circulating water pool with overflow, causes Circulation water density higher.
When 3, entering to press precipitator tower material, its underflow density can reach 550g/l, enters the pressure time generally at about 1100 seconds.And when entering to press concentration basin material, because its feed thickness fluctuates between 300 ~ 450g/l, entering the pressure time comparatively enters to press the precipitator tower time long, is generally about 1400 seconds, simultaneously for preventing agitator from running overflow, concentration basin underflow pump (602/603) need start repeatedly just can enter pressure one circulation.Integrated comparative, utilizes heavy tower to reclaim tail coal efficiency higher, is more conducive to producing.
In a word, it is low that existing technique tail coal reclaims ability, and water consumption is large, and power consumption is high, high material consumption, and running efficiency of system is low, and plant maintenance workload is large, affects normal coal washing and produce.
Utility model content
For the problems referred to above, the utility model provides a kind of black water tandem system.
The utility model solves the technical scheme that its technical problem adopts: black water tandem system, comprise concentration basin, Pulp pump, precipitator tower, pan feeding pump, quick-opening press filter and tail coal scraper plate, the said equipment connects successively.
Black water series connection treatment process, comprises the following steps:
A. first black water enters concentration basin and carries out first time sedimentation, and its overflow recycles to circulating water pool as recycled water;
B. the underflow of concentration basin squeezes into clear water layer continuously by Pulp pump is that the precipitator tower of 4 meters carries out second time sedimentation, and its overflow recycles to circulating water pool as recycled water together with the overflow of concentration basin;
C. the underflow pan feeding pump of precipitator tower is squeezed into quick-opening press filter and is reclaimed coal slime, and the filtrate water of quick-opening press filter recycles to circulating water pool as recycled water;
D. the tail coal of quick-opening press filter recovery is to tail coal scraper plate.
The beneficial effects of the utility model are, power consumption obviously reduces, and material consumption obviously reduces, and plant maintenance workload significantly reduces, and avoid and cause coal washing stoppage in transit phenomenon to occur because tail coal reclaims.Concentration basin underflow achieves continuous blow-down, has stopped the generation of pressing rake accident.Tail coal reclaims ability and improves 15%; Improve running efficiency of system, decrease labo r usage.Decrease number of devices, eliminate tailing pit and mine tailing agitator.
Accompanying drawing explanation
Fig. 1 is the utility model system and process flow diagram;
Fig. 2 is existing process flow diagram.
Parts and numbering in Fig. 1:
1-concentration basin, 2-Pulp pump, 3-precipitator tower, 4-pan feeding pump, 5-quick-opening press filter,
6-tail coal scraper plate.
Detailed description of the invention
Below in conjunction with embodiment, the utility model is further illustrated.
See Fig. 1, black water tandem system, comprise concentration basin 1, Pulp pump 2, precipitator tower 3, pan feeding pump 4, quick-opening press filter 5 and tail coal scraper plate 6, the said equipment connects successively.
Concentration basin 1 diameter is 24 meters.Precipitator tower 3 diameter is 12 meters.
Black water series connection treatment process, comprises the following steps:
A. first black water enters concentration basin 1 and carries out first time sedimentation, and its overflow recycles (overflow water concentration < 15g/l) to circulating water pool as recycled water;
B. the underflow (controlled concentration is 120 ~ 200g/l) of concentration basin 1 squeezes into clear water layer continuously by Pulp pump 2 is that the precipitator tower (3) of 4 meters carries out second time sedimentation, and its overflow (concentration is less than 10 g/l) recycles to circulating water pool as recycled water together with the overflow of concentration basin 1;
C. the underflow (concentration >=550g/l) of precipitator tower 3 is squeezed into quick-opening press filter 5 with pan feeding pump 4 and is reclaimed coal slime, and the filtrate water of quick-opening press filter 5 recycles to circulating water pool as recycled water;
D. the tail coal of quick-opening press filter 5 recovery is to tail coal scraper plate 6.

Claims (3)

1. a black water tandem system, comprise concentration basin (1), Pulp pump (2), precipitator tower (3), pan feeding pump (4), quick-opening press filter (5) and tail coal scraper plate (6), it is characterized in that, the said equipment connects successively.
2. black water tandem system according to claim 1, is characterized in that, described concentration basin (1) diameter is 24 meters.
3. black water tandem system according to claim 1, is characterized in that, described precipitator tower (3) diameter is 12 meters.
CN201420782228.6U 2014-12-12 2014-12-12 Black water tandem system Expired - Fee Related CN204352650U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420782228.6U CN204352650U (en) 2014-12-12 2014-12-12 Black water tandem system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420782228.6U CN204352650U (en) 2014-12-12 2014-12-12 Black water tandem system

Publications (1)

Publication Number Publication Date
CN204352650U true CN204352650U (en) 2015-05-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104436854A (en) * 2014-12-12 2015-03-25 四川达竹煤电(集团)有限责任公司石板选煤发电厂 Slime water serial treatment system and slime water serial treatment process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104436854A (en) * 2014-12-12 2015-03-25 四川达竹煤电(集团)有限责任公司石板选煤发电厂 Slime water serial treatment system and slime water serial treatment process

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150527

Termination date: 20151212

EXPY Termination of patent right or utility model