NL2026347A - Compact Rake-less Concentration Device - Google Patents

Compact Rake-less Concentration Device Download PDF

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Publication number
NL2026347A
NL2026347A NL2026347A NL2026347A NL2026347A NL 2026347 A NL2026347 A NL 2026347A NL 2026347 A NL2026347 A NL 2026347A NL 2026347 A NL2026347 A NL 2026347A NL 2026347 A NL2026347 A NL 2026347A
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diversion
assembly
bypass
areas
tank
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NL2026347A
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Dutch (nl)
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NL2026347B1 (en
Inventor
Qiu Chengliang
Wang Chao
Zhou Jiaqiang
Yang Junlong
Hu Biao
Zhang Yu
Zhang Jin
Jiang Xueqing
Wu Shouzhen
Zhao Erning
Xiao Xiong
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Anhui Univ Of Science And Technologyanhui Univ Of Science And Technologyanhui Univ Of Science And Te
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/02—Foam dispersion or prevention
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0009—Settling tanks making use of electricity or magnetism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0084—Enhancing liquid-particle separation using the flotation principle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/02—Settling tanks with single outlets for the separated liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2405—Feed mechanisms for settling tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2433—Discharge mechanisms for floating particles
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
    • C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5281—Installations for water purification using chemical agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/15—Treatment of sludge; Devices therefor by de-watering, drying or thickening by treatment with electric, magnetic or electromagnetic fields; by treatment with ultrasonic waves
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/12—Inert solids used as ballast for improving sedimentation

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • General Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Liquid Carbonaceous Fuels (AREA)
  • Paper (AREA)

Abstract

The present invention relates to the field of slime water treatment, in particular to a compact rake-less concentration device, which comprises a feed assembly, a diversion assembly and a clean coal collection assembly, wherein the diversion assembly also comprises a centre tank, slime water passes through the feed assembly, flows from above the centre tank to the middle part of the centre tank together with an agent and then spreads around, and after reaction, the residual mineralized froth and fine slime move upwards from the inside wall of the centre tank into the clean coal collection assembly; the clean coal collection assembly is located above the outlet of the diversion assembly and provided with edge feed areas and defrothing areas in sequence from outside to inside; and the clean coal collection assembly also comprises diversion settlement areas arranged on the outside wall of the centre tank, and the slime water of which the froth is eliminated by the defrothing areas is output from the middle part of the centre tank to the inlets of the diversion settlement areas through a first overflow discharge pipe. The device realizes the structural integration of the traditional multi-stage concentration tank, which greatly reduces the area occupied by the traditional multi-stage concentration tank.

Description

Compact Rake-less Concentration Device Technical Field The present invention relates to the field of slime water treatment, in particular to a compact rake-less concentration device. Background During the coal washing and processing process, the slime water treatment, as the final link of the washing process, is the key to the effective collection and utilization of slime and the closed circulation of washing water. The concentration device, as the carrier and key equipment for slime water treatment, is already widely used, and is of great significance to closed circulation of washing water, full utilization of underflow concentrate and environmental protection. With the integration and enlargement of coal washing plants, the treatment capacity is greatly increased, and the output quantity of slime water and the content of fine slime in the slime water are also increased significantly. Therefore, the diameter of the concentration device shall be constantly increased in the application process. Some of the existing equipment already reach the specifications of 45 m and above. However, due to finer slime and the increase in the treatment capacity, the settling time is short, the settlement effect is poor, and the fine slime cannot be effectively removed from the washing circulating water, which will seriously affect the coal washing quality. Therefore, many coal preparation plants add second- stage or even third-stage concentration to further purify the washing circulating water, which will occupy a lot of land. In addition, the froth with coal which is not fully recovered in the flotation stage still remains in the slime water, thus resulting in waste of clean coal and economic loss.
Summary In order to make full use of the multi-stage settlement technology to realize multi-stage concentration and combination in the concentrator structure and in order to use the defrothing technology to realize the recovery and utilization of clean coal on the residual mineralized froth, the occupied area is greatly reduced, and meanwhile, the recovery of clean coal is increased, and the diversified utilization of slime is realized, thus increasing economic income and reducing waste. Therefore, the present invention provides a compact rake-less concentration device. To achieve the above purpose, the present invention adopts the following technical solution: A compact rake-less concentration device, comprises a feed assembly, a diversion assembly and a clean coal collection assembly, wherein the diversion assembly also comprises a centre tank, slime water passes through the feed assembly, flows from above the centre tank to the middle part of the centre tank together with an agent and then spreads around, and after reaction, the residual mineralized froth and fine slime move upwards from the inside wall of the centre tank into the clean coal collection assembly; the clean coal collection assembly is located above the outlet of the diversion assembly and provided with edge feed areas and defrothing areas in sequence from outside to inside; and the clean coal collection assembly also comprises diversion settlement areas arranged on the outside wall of the centre tank, and the slime water of which the froth is eliminated by the defrothing areas is output from the middle part of the centre tank to the inlets of the diversion settlement areas through a first overflow discharge pipe.
The present invention has the advantages that: (1) The device realizes the structural integration of the traditional multi-stage concentration tank, which greatly reduces the area occupied by the traditional multi-stage concentration tank.
(2) In the device, the defrothing areas in the clean coal collection assembly are arranged in the centre tank and converged to the centre of the centre tank. In the radial direction, the fluid settles step by step from high to low through the diversion settlement areas arranged on the outside wall of the centre tank, and the overflow water is collected by gravity flow to realize the unpowered gravity flow of fluid.
(3) The separation of coarse slime products and fine slime products is realized; coarse slime products with high percentage of coal content can be used as coal blending for middling products, increasing economic income and reducing waste; centralized accumulation and discharge is realized for fine slime products, reducing pollution; and the more sufficient separation of fine slime and water is realized, greatly improving the deterioration phenomenon of the washing process caused by circulating water.
(4) Whether the fine slime can settle in the concentrator mainly depends on the vertical movement distance of the fine particles, and the arrangement of the high-position and low-position diversion plates in the diversion settlement screen can allow the second-stage slime water to obtain sufficient settling time in a limited space so as to realize the full settlement of fine slime.
(5) The arrangement of the defrothers can realize the desorption of the concentrate on the residual mineralized froth by means of pulse hammering, and the jet water can still realize the flushing and collection of the wall concentrate.
(6) The arrangement of the magnetism-concentrated spray throwers can use magnetic particles as magnetic seeds to strengthen the adhesion of the flocculant, thereby accelerating the adhesion of the fine slime and the flocculant, realizing the accelerated settlement of the fine slime, and further realizing the full separation of the slime and water.
(7) Bell mouth feeding is adopted, and the dispersed diversion plates divide the horn discharge ports to form a multi-channel outlet for distribution, which makes distribution more uniform and optimizes the settlement environment.
(8) The arrangement of the feed assembly realizes the addition of the flocculating agent through the ejection effect, and meanwhile, the sudden expansion and contraction of the fluid leads to changes in the pressure difference, resulting in the phenomenon of aggravated turbulence, so as to realize the full mixing of the flocculant and the slurry.
Description of Drawings Fig. 1 is a schematic diagram of the flow direction of coal water in the present invention.
Fig. 2 is a structural diagram of the whole device for the first solution of the diversion settlement areas.
Fig. 3 is a structural diagram of the whole device for the second solution of the diversion settlement areas.
Fig. 4 is a structural diagram of the whole device for the third solution of the diversion settlement areas.
Fig. 5 is a structural diagram of a clean coal collection assembly for the first solution of the diversion settlement areas.
Figure 6 is a structural schematic diagram with the diversion settlement areas as defrothers.
Fig. 7 is a structural diagram for the first solution of the diversion settlement areas.
Fig. 8 to Fig. 9 are structural diagrams of defrothing areas for the second and third solutions of the diversion settlement areas.
Fig. 10 is a structural diagram for the second solution of the diversion settlement areas.
Fig. 11-12 are structural diagrams for the third solution of the diversion settlement areas.
Fig. 13 is a structural diagram of a first distributor, a second distributor and a third distributor.
Meanings of the reference signs in the figures are as follows: 11 - main feed pipe 12 - reducer 13 - agent ejector pipe 21 - centre tank 22 - centre feed pipe 23 - dispersed diversion plate 24 - first discharge port 25 - froth guiding plate 26 - horizontal support rod 27 - overflow launder 31 - edge feed area 32 - connecting rod 320 - lower plate body 321 - side plate 322- high-position plate 323 - low-position plate 324 - sudden contraction and expansion spoiler 325 - spoiling settlement plate 331 - first underflow discharge pipe 332 - first discharge valve 333 - first overflow discharge pipe 341 - shock pipe 342 - grooved roller 343 - hammering defrothing plate 344 - hammer lever 345 - bent diversion plate 346 - reciprocating spring 347 - clean coal collecting launder 348 - bracket
351 - first magnetism-concentrated ejector pipe 352 - first magnetic powder feed pipe 353 - first distributor 361 - second magnetism-concentrated ejector pipe 362 - second magnetic powder feed pipe 363 - second distributor 371 - annular groove 3711 - second spoiling partition plate 3712 - second underflow discharge port 372 - second sloping plate diversion discharge pipe 373 - second underflow discharge pipe 374 - second overflow discharge pipe 381 - third magnetism-concentrated ejector pipe 382 - third magnetic powder feed pipe 383 - third distributor 391 - settling tank 3911 - third spoiling partition plate 392 - third sloping plate diversion discharge pipe 393 - third underflow discharge pipe 394 - third overflow discharge pipe 395 - connecting pipe Detailed Description A compact rake-less concentration device, comprises a feed assembly, a diversion assembly and a clean coal collection assembly. The diversion assembly comprises a centre tank 21 with a cylindrical portion at the upper end and a funnel portion at the lower end, the centre tank 21 has a cavity structure, the feed assembly is arranged above the cavity of the centre tank 21, and the lower end of the centre tank 21 is provided with a first discharge port 24. Coarse slime gradually settles to above the first discharge port 24 of the centre tank 21, deposits to a certain amount, and is discharged from the first discharge port 24, and the materials discharged from the first discharge port 24 are collected to be used for blending of middling coal or as building materials to increase economic income.
The materials and the agent flow from above the centre tank 21 to the middle part of the centre tank 21, that is direction a in Fig. 1, and then spread around from the middle part in direction b to enter the funnel portion of the centre tank 21. After the reaction of the materials and the agent, the coarse slime flows out from the first discharge port 24, and the diversion assembly causes the residual floating mineralized froth and fine slime to move upwards along the inside wall of the centre tank in direction c into the clean coal collection assembly, and to flow towards the outside wall of the centre tank 21 from the middle part of the centre tank after flowing to the middle part of the centre tank 21 in moving direction d in the clean coal collection assembly, during which the residual floating mineralized froth and fine slime pass through the defrothing areas and the settlement areas in sequence so as to separate water and settled fine slime.
The components are described below in detail.
1. Feed Assembly As shown in Fig. 2-4, the feed assembly comprises a main feed pipe 11, a horizontal support rod 26 and agent ejector pipes 13.
One end of the main feed pipe 11 is fed with slime water, the other end is used as the 5 output end of the feed assembly, and the middle part of the main feed pipe 11 comprises a reducer 12. In the solution, the reducer 12 is composed of round balls and round pipes, forming a gourd shape with alternating sudden expansion and sudden contraction.
The agent ejector pipes 13 are uniformly distributed at sudden contraction places of the reducer 12 and communicated with the round pipes at the sudden contraction places. The flow velocity at the sudden contraction places will suddenly increase, forming negative pressure at the junction of the agent ejector pipes 13 and the reducer 12, which will have a good suction effect on the flocculant in the agent ejector pipes 13. The pressure at the sudden expansion places increases, the flow velocity slows down, and the turbulence intensity increases at this moment, so the flocculant and the slime water are fully mixed.
The opening degree of the inlets of the agent ejector pipes 13 can be controlled by a superior valve to control the agent suction volume. For the materials and the agent, agent suction and slurry mixing are realized through the suction effect of the reducer 12.
2. Diversion Assembly As shown in Fig. 2-4, the diversion assembly comprises a jet feed pipe 22 and dispersed diversion plates 23, wherein the input end of the jet feed pipe 22 is connected with the outlet end of the feed assembly, and the dispersed diversion plates 23 diffuse the slime water output from the jet feed pipe 22 to the surrounding. The materials and the agent are mixed to react at the funnel portion of the centre tank 21, and the coarse slime gradually settles to the deep-cone place of the centre tank 21, deposits to a certain amount, and then is discharged from the first discharge port 24. A froth guiding plate 25 is arranged above the outlets of the dispersed diversion plates 23, and the froth produced after reaction carries fine slime to move upwards along with the froth guiding plate 25 from the outside wall of the centre tank 21 to the clean coal collection assembly. In the solution, the diversion assembly discharges coarse slime from the first discharge port 24 on one hand, and makes fine slime water move upwards along with the residual mineralized froth in the centre tank 21 along the inside wall through the froth guiding plate 25 to the clean coal collection assembly an the other hand so as to separate fine slime from water.
In order to support the feed assembly and the jet feed pipe 22 above, a horizontal support rod 26 is fixed on the outside wall of the jet feed pipe 22.
3. Clean Coal Collection Assembly The clean coal collection assembly comprises edge feed areas 31 on the inside surface of the centre tank 21, a plurality of defrothing areas, and settlement areas corresponding to the defrothing areas. The dispersed diversion plates 23 in the diversion assembly are located below the defrothing areas, and the plurality of defrothing areas are annularly arrayed between the edge feed areas 31 and the centre feed pipe 22.
3.1. Edge Feed Area 31 As shown in Fig. 2-6 and Fig. 8, in order to make the defrothing areas have a certain support, the defrothing areas and the inside surface of the centre tank 21 are connected by a plurality of connecting rods 32, and the space between the two adjacent connecting rods 32 is used as an edge feed area 31. The end of the froth guiding plate 25 close to the connecting rods 32 is connected with the bottoms of the defrothing areas and kept in a sealed state to prevent the froth carrying fine slime from entering above the dispersed diversion plates 23. In the solution, the defrothing areas gradually lower toward the centre of the centre tank 21. In order to prevent froth carrying fine slime from directly entering the ends of the defrothing areas, the bottoms of the defrothing areas and the froth guiding plate 25 form a sealed cavity. Specifically, the froth guiding plate 25 has a spherical structure.
3.2. Defrothing Area As shown in Fig. 2-6 and Fig. 8-9, the defrothing area comprises a first diversion settlement screen and defrothers located in the setting position above the first diversion settlement screen, and a plurality of defrothers are arranged along the flow direction of the fluid so as to improve the defrothing effect.
3.2.1. First Diversion Settlement Screen As shown in Fig. 2-6 and Fig. 8-9, the first diversion settlement screen comprises a first diversion area enclosed by side plates 321 on both sides and lower plate bodies 320, and the lower plate bodies 320 and a first underflow discharge pipe 331 thereunder are conducted through a first discharge valve 332 so that clean coal deposited at the bottom can be recovered. The output end of the first underflow discharge pipe 331 extends out of the centre tank 21. The material with clean coal deposited on the lower plate bodies 320 can be discharged by regularly opening the first discharge valve 332. The upper ends of the side plates 321 are higher than the outer edges of the edge feed areas 31 so that the material overflowing from the edge feed areas 31 to the first diversion area will not overflow directly, and needs to be treated by the clean coal collection assembly. The height of the upper ends of the high-position plates 322 of the first diversion area gradually lowers along the flow direction of the slime water.
Preferably, the first diversion area is provided with high-position plates 322 and low-position plates 323 alternately along the flow direction of the fluid, and the high-position plates 322 and the low-position plates 323 are misaligned up and down and alternately fixed between the two side plates 321. The fluid flows through the lower ends of the high-position plates 322 and the upper ends of the low-position plates 323 to increase the settling rate of the fine slime. The high-position plates 322 are arranged on the right side of the first discharge valve 332 at each lower plate body 320, and the low-pasition plates 323 are arranged on the left side. Preferably, sudden contraction and expansion spoilers 324 are arranged in the upflow section enclosed by the high-position plates 322 and the low-position plates 323 of the first diversion settlement screen, which increases the secondary enrichment effect of the escaping froth, removes fine slime, and facilitates hammering, defrothing and recovery at the back ends of the defrothing areas.
3.2.2. Defrother As shown in Fig. 8, each defrothing area comprises a plurality of defrothers arranged along the radial direction of the cylindrical portion, and each defrother comprises a support unit, a hammering unit, a drive unit, and a diversion unit. The support unit comprises brackets 348, wherein the first bracket 348 is fixed above the plate body where the first diversion area and the edge feed areas 31 intersect, and the other brackets 348 are fixed on the upper end surfaces of the high-position plates 322. Specifically, the bracket 348 is a tripod formed by two side rods and support plates thereunder, which not only plays a supporting role, but also does not affect the material from entering the first diversion area or flowing in the first diversion area. The hammering unit comprises a hammering defrothing plate 343, a clean coal collecting launder 347 and a hammer lever 344. One end of the hammer lever 344 is hinged with the bracket 348, the other end is hinged with the hammering defrothing plate 343, and the clean coal collecting launder 347 is fixed on the side plates 321. The drive unit comprises a shock pipe 341, a grooved roller 342 and a reciprocating spring 346, the upper end of the shock pipe 341 is communicated with the jet feed pipe 22, and the lower end is opposite to the inner wall of the clean coal collecting launder 347 on the grooved roller 342. The middle part of the hammer lever 344 is connected with the middle parts of two side rods of the bracket 348 through the reciprocating spring 346, and the grooved roller 342 is arranged on the hammer lever 344 and connected by a rotating shaft; and the hammering defrothing plate 343 hammers downward, and the hammer lever 344 has the amount of deflection from the centre smaller than the compression amount of the reciprocating spring 346 after being shocked. When the material in the jet feed pipe 22 flows from the shock pipe 341 into the grooved roller 342, the grooved roller 342 is rotated at a non-uniform velocity. Due to the increase in the mass of the whole drive unit and the hammering unit, the reciprocating spring 346 is in a compressed state, and the hammering defrothing plate 343 is compressed into the clean coal collecting launder 347 until the material in the grooved roller 342 is excessive, which causes the roller to rotate and dump all the material. Here, the energy accumulated by the reciprocating spring 346 keeps the hammering defrothing plate 343 away from the clean coal collecting launder 347, and the periodic motion realizes that the hammering defrothing plate 343 reciprocally flaps the clean coal collecting launder 347 in the clean coal collecting launder 347 to achieve defrothing. The slime water thrown from the shock pipe 341 will also flush the clean coal on the hammering defrothing plate 343 so that the clean coal is discharged from the concentrate discharge port into the clean coal collecting launder 347 and collected.
The diversion unit comprises a bent diversion plate 345 which is arranged in the lower section of the clean coal collecting launder 347 and placed in the downflow section enclosed by the high-position plates 322 and the low-position plates 323 in the first diversion settlement screen. After entering the defrothing areas, the mineralized froth rises to the inlet of the clean coal collecting launder 347 along the bent diversion plate 345 in the roller pulse defrothing device and enters the clean coal collecting launder 347.
In conclusion, the fine slime not settled and the mineralized froth regenerated due to residual flotation agent and clean coal are converged to the edge feed areas 31 along with the water flow and distributed to the first diversion settlement screen, and then pass through the second diversion settlement screen, and the slime water containing fine slime flows to the edge of the centre tank 21 in the radial direction.
3.3. Diversion Settlement Area Many solutions are provided for the diversion settlement areas, as described below in detail: A3.3. First Solution for Diversion Settlement Area As shown in Fig. 2 and Fig. 7, a plurality of diversion settlement areas are provided, correspondingly arranged behind the defrothing areas and located between the edge feed areas 31 and the inside wall of the centre tank 21, and each diversion settlement area comprises a second diversion settlement screen and a magnetism-concentrated spray thrower located in the setting position above the second diversion settlement screen.
A3.3.1. Second Diversion Settlement Screen As shown in Fig. 2 and Fig. 7, the second diversion settlement screen and the first diversion settlement screen are integrated into a whole, and the sudden contraction and expansion spoilers 324 in the first diversion settlement screen are replaced with spoiling settlement plates 325, thereby improving the hindered settling effect of fine slime, and other structures are the same.
Specifically, the innermost high-position plate 322 has the same height as the overflow launders 27 in the middle part of the centre tank 21 so that the liquid after defrothing can overflow into the overflow launders 27. A first overflow discharge pipe 333 is arranged at the bottoms of the overflow launders 27 to discharge the settled water in the overflow launders 27 for recovery.
The overflow launders 27 are annularly arranged on the outside wall of the upper end of the cylindrical portion of the centre tank 21. The first diversion settlement screen and the second diversion settlement screen cooperate to realize the multi- stage settlement of the slime water, avoiding the installation of the two-stage concentrator, reducing the occupied area, and at the same time, providing sufficient settlement time for fine slime by means of central collection and multi-stage diversion settlement.
A3.3.2. Magnetism-Concentrated Spray Thrower As shown in Fig. 7, the magnetism-concentrated spray thrower comprises a first magnetism-concentrated ejector pipe 351, a first magnetic powder feed pipe 352 and a first distributor 353, and is arranged on the high-position plate 322 at the inlet above the second diversion settlement screen.
The upper end of the first magnetism-concentrated ejector pipe 351 is communicated with the jet feed pipe 22, and the lower end is communicated with the first distributor 353. One end of the first magnetic powder feed pipe 352 is connected with the pipeline at the magnetic powder supply point, and the other end is communicated with the first magnetism-concentrated ejector pipe 351. The outlet of the lower end of the first distributor 353 is fan-shaped and is separated by a plurality of partition plates so that the magnetism- concentrated material flows down uniformly along the side wall of the diversion plate fixed on the high-position plate 322 to realize the accelerated settlement of fine slime.
When the slime water passes through the second diversion settlement screen, the magnetism-concentrated spray thrower sprays magnetic seeds to achieve efficient settlement.
The slime water flows again around the bottom of the high-position plate 322 step by step, and then overflows through the top of the low-position plate 323 to the tank formed between the high-position plate 322 and the high-position plate 323 of the next stage, during which the fine slime will be fully settled by the hindered settling of the spoiling settlement plate 325, separated from the water completely, deposited on the lower plate body 320, and then discharged from the first underflow discharge pipe 331. The overflow water settled by the second diversion settlement screen is discharged into the overflow launders 27 to enter the washing process again as circulating water to realize closed circulation.
B3.3. Second Solution for Diversion Settlement Area As shown in Fig. 3 and Fig. 10, the diversion settlement area comprises an annular diversion settlement screen and a magnetism-concentrated spray thrower, and the annular diversion settlement screen is spirally arranged downwards around the centre tank 21. In the embodiment, the first diversion settlement screen of the defrothing area extends to the inside wall of the centre tank 21, and the slime water which does not settle at the first diversion settlement screen after defrothing overflows the centre tank 21 to the inlet of the annular diversion settlement screen. A magnetism-concentrated spray thrower is arranged above the overflow port of each defrothing area. B3.3.1. Second Diversion Settlement Screen As shown in Fig .3 and Fig. 10, the annular diversion settlement screen comprises an annular groove 371 spirally arranged around the centre tank 21, second spoiling partition plates 3711 are arranged in sequence in the annular groove 371, and the bottom plate between the two adjacent second spoiling baffle plates 3711 is provided with second underflow discharge ports 3712, wherein the second spoiling baffle plates 3711 improve the hindered settling effect of fine slime. Second sloping plate diversion discharge pipes 372 are arranged below the plurality of second underflow discharge ports 3712, and the outlets of all the second sloping plate diversion discharge pipes 372 are converged to a second underflow discharge pipe 373, that is, the settled material is discharged from the second underflow discharge pipe 373, and after passing through the second spoiling baffle plates 3711 in the annular groove 371, the settled water is discharged from a second overflow discharge pipe 374 arranged at the end of the annular groove 371 to enter the washing process again as circulating water to realize closed circulation. B3.3.2. Magnetism-Concentrated Spray Thrower As shown in Fig. 3 and Fig. 10, the magnetism-concentrated spray thrower comprises a second magnetism-concentrated ejector pipe 361, a second magnetic powder feed pipe 362 and a second distributor 363. The upper end of the second magnetism-concentrated ejector pipe 361 is communicated with the jet feed pipe 22, and the lower end is communicated with the second distributor 363. One end of the second magnetic powder feed pipe 362 is connected with the pipeline at the magnetic powder supply point, and the other end is communicated with the second magnetism-concentrated ejector pipe 361. The outlet of the lower end of the second distributor 363 is fan-shaped and is separated by a plurality of partition plates so that the magnetism-concentrated material at the outlet flows down uniformly along the side wall of the diversion plate to realize the accelerated settlement of fine slime. When the slime water passes through the annular diversion settlement screen, the magnetism-concentrated spray thrower sprays magnetic seeds to achieve efficient settlement.
C3.3. Third Solution for Diversion Settlement Area As shown in Fig. 11-12, the diversion settlement area comprises a stepping-down diversion settlement screen and a magnetism-concentrated spray thrower, wherein the stepping-down diversion settlement screen is arranged downwards along the outer wall of the centre tank 21 by means of stepping down. In the embodiment, the first diversion settlement screen of the defrothing area extends to the inside wall of the centre tank 21, and the slime water which does not settle at the first diversion settlement screen after defrothing overflows the centre tank 21 into the stepping-down diversion settlement screen. A magnetism-concentrated spray thrower is arranged above the overflow port of each defrothing area.
C3.3.1. Stepping-Down Diversion Settlement Screen As shown in Fig. 11-12, the stepping-down diversion settlement screen comprises a plurality of third diversion settlement subgroups arranged downwards in sequence along the outer wall of the centre tank 21, each third diversion settlement subgroup comprises a settling tank 391, a plurality of third spoiling partition plates 3911 are alternately arranged in the settling tank 391, and the third spoiling partition plates 3911 can be alternately arranged on both side plates of the settling tank 391 according to the arrangement mode of the high-position plates 322 and the low-position plates 323, wherein the third spoiling partition plates 3911 improve the hindered settling effect of fine slime.
The bottom plate of the settling tank 391 is provided with third underflow discharge ports, a third sloping plate diversion discharge pipe 392 is arranged below each settling tank 391, the fine slime discharged from all the third underflow discharge ports in each settling tank 391 is collected, the outlets of all the third sloping plate diversion discharge pipes 392 are converged to a third underflow discharge pipe 393, and finally, the settled fine slime is discharged from the third underflow discharge pipe 393.
After passing through all the third spoiling partition plates 3911 in each third diversion settlement subgroup, the part not settled of the slime water is output from the connecting pipe 395 to the inlet of the next third diversion settlement subgroup until the lowest third diversion settlement subgroup. The water fully settled is output from the third overflow discharge pipe 394 at the output end of the lowest third diversion settlement subgroup to enter the washing process again as circulating water to realize closed circulation.
C3.3.2. Magnetism-Concentrated Spray Thrower As shown in Fig. 4 and Fig. 11-12, the magnetism-concentrated spray thrower comprises a third magnetism-concentrated ejector pipe 381, a third magnetic powder feed pipe 382 and a third distributor 383. The upper end of the third magnetism-concentrated ejector pipe 381 is communicated with the jet feed pipe 22, and the lower end is communicated with the third distributor 383. One end of the third magnetic powder feed pipe 382 is connected with the pipeline at the magnetic powder supply point, and the other end is communicated with the third magnetism-concentrated ejector pipe 381. The outlet of the lower end of the third distributor 383 is fan-shaped and is separated by a plurality of partition plates so that the magnetism-
concentrated material at the outlet flows down uniformly along the side wall of the diversion plate to realize the accelerated settlement of fine slime. When the slime water passes through the stepping-down diversion settlement screen, the magnetism-concentrated spray thrower sprays magnetic seeds to achieve efficient settlement. Then, during this process, fine slime will be fully settled and completely separated from water. In order to achieve a better settlement effect, magnetism-concentrated spray thrower are respectively arranged at the input ends of a plurality of third diversion settlement subgroups in the solution.
As shown in Fig. 13, the first distributor 353, the second distributor 363 and the third distributor 383 have the same structure. The use of multi-channel distributors makes the distributors more uniform and does not require a rake for stirring during the working process, thoroughly solving the "rake pressing" phenomenon and ensuring the continuous and stable operation of the concentrator.
To sum up, in the clean coal collection assembly, the edge feed areas 31, the structure of the defrothing areas and three kinds of diversion settlement areas can be combined arbitrarily to form different technical solutions.
The above only describes preferred embodiments of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and the principle of the present invention shall be contained within the protection scope of the present invention.

Claims (10)

CONCLUSIESCONCLUSIONS 1. Een compacte harkloze concentratie-inrichting, met het kenmerk dat deze omvat een toevoersamenstel, een omleidingssamenstel en een verzamelsamenstel voor schone kolen, waarbij het omleidingssamenstel ook een middentank (21) bevat, waarbij slikwater het toevoersamenstel passeert, samen met een agens van boven de middentank (21) naar het middendeel van de middentank (21) stroomt en zich vervolgens verspreidt en na een reactie het achterblijvende gemineraliseerde schuim en het fijne slik vanuit de binnenwand van de middentank (21) naar boven in het omleidingssamenstel voor schone kolen beweegt; waarbij het verzamelsamenstel voor schone kolen boven de uitlaat van het omleidingssamenstel is gelegen en achtereenvolgens van buiten naar binnen toe is voorzien van randtoevoergebieden (31) en van ontschuimingsgebieden; en waarbij het verzamelsamenstel voor schone steenkolen eveneens omleidingsbezinkingsgebieden omvat die aan de buitenwand van de middentank (21) zijn gerangschikt, en het slikwater waarvan het schuim door de ontschuimingsgebieden is verwijderd door een eerste overloop-afgifteleiding (33) uit het middendeel van de middentank naar de inlaten van de omleidingsbezinkingsgebieden wordt geleid.A compact rakeless concentrator, characterized in that it comprises a feed assembly, a diversion assembly and a clean coal collection assembly, the diversion assembly also including a center tank (21), wherein sludge water passes through the feed assembly, together with an agent from above the center tank (21) flows to the center portion of the center tank (21) and then disperses and after a reaction, the residual mineralized foam and fine sludge moves from the inner wall of the center tank (21) upwards into the clean coal diversion assembly; wherein the clean coal collecting assembly is located above the outlet of the bypass assembly and successively provided from the outside inwardly with edge feed areas (31) and with defoaming areas; and wherein the clean coal collection assembly also includes bypass settling zones arranged on the outer wall of the middle tank (21), and the sludge water from which the foam has been removed by the defoaming zones through a first overflow delivery line (33) from the middle portion of the middle tank to the inlets of the diversion settling zones. 2. De compacte harkloze concentratie-inrichting volgens conclusie 1, met het kenmerk dat het omleidingsbezinkingsgebied een ringvormige omleidingsbezinkingszeef en een door magnetisme geconcentreerde sproeiwerper omvat, waarbij de ringvormige omleidingsbezinkingszeef een ringvormige groef (371) omvat die spiraalvormig rondom middentank (21) is gerangschikt, waarbij de ringvormige groef (371) is voorzien van achter elkaar in lengterichting geplaatste tweede spoelverdeelplaten (3711), waarbij de lager gelegen bodemplaat van de ringvormige groef (371) is voorzien van tweede onderstroom- afgifterpoorten (3712), tweede schuine plaat-omleidingsafgiftebuizen (372) onder de meerdere tweede onderstroom-afgiftepoorten (3712) zijn gerangschikt, waarbij de uitlaten van alle tweede schuine plaat-omleidingsafgiftebuizen (372) samenkomen in een tweede onderstroom-afgiftebuis (373), en het bezonken water wordt afgegeven uit een tweede overstroomafgiftebuis (374) die aan het einde van de ringvormige groef (371) is gerangschikt.The compact rakeless concentrator according to claim 1, characterized in that the bypass settling area comprises an annular bypass settling screen and a magnetism concentrated spray thrower, the annular bypass settling screen comprising an annular groove (371) arranged spirally around center tank (21), wherein the annular groove (371) comprises sequentially disposed longitudinally second coil distribution plates (3711), the lower bottom plate of the annular groove (371) having second underflow dispensing ports (3712), second slanted plate bypass dispensing tubes ( 372) are arranged below the plurality of second underflow dispensing ports (3712), wherein the outlets of all of the second slant plate bypass dispensing tubes (372) converge in a second underflow dispensing tube (373), and the settled water is dispensed from a second overflow dispensing tube ( 374) which at the end of the annular gr phew (371) is ranked. 3. De compacte harkloze concentratie-inrichting volgens conclusie 2, met het kenmerk dat het toevoersamenstel een hoofdtoevoerbuis (11) en uitwerpbuizen (13) voor agens omvat; en een uiteinde van de hoofdtoevoerbuis (11) met slikwater wordt gevoed, en het andere uiteinde als uitgangseinde van het toevoersamenstel wordt gebruikt, waarbij het middendeel van de hoofdtoevoerbuis (11) een reduceerinrichting (12) omvat, en de uitwerpbuizen (13) voor agens gelijkmatig zijn verdeeld bij plaatsen van plotselinge samentrekking van de reduceerinrichting (12) en in contact staan met de plaatsen van plotselinge samentrekking.The compact rakeless concentrator according to claim 2, characterized in that the supply assembly comprises a main supply tube (11) and agent ejection tubes (13); and one end of the main supply tube (11) is fed with sludge water, and the other end is used as an exit end of the supply assembly, the middle portion of the main supply tube (11) including a reducing device (12), and the agent ejection tubes (13) are evenly distributed at sites of sudden contraction of the reducer (12) and in contact with the sites of sudden contraction. 4. De compacte harkloze concentratie-inrichting volgens conclusie 3, met het kenmerk dat het omleidingssamenstel uit een straaltoevoerbuis (22) en verspreide omleidingsplaten (23) omvat, waarbij het invoeruiteinde van de straaltoevoerbuis (22) is verbonden met het uitlaatuiteinde van het toevoersamenstel, en de verspreide omleidingsplaten (23) de afvoer van het slikwater vanuit de straaltoevoerbuis (22) in de omgeving straalaanvoerbuis.The compact rakeless concentrator according to claim 3, characterized in that the diversion assembly comprises a jet supply tube (22) and scattered diversion plates (23), the inlet end of the jet supply tube (22) being connected to the outlet end of the supply assembly, and the scattered diversion plates (23) discharge the sludge water from the jet supply tube (22) into the surrounding jet supply tube. 5. De compacte harkloze concentratie-inrichting volgens conclusie 1, met het kenmerk dat het omleidingssamenstel eveneens een schuimgeleidingsplaat (25) omvat die boven de uitlaten van de verspreide omleidingsplaten (23) is gerangschikt.The compact rakeless concentrator according to claim 1, characterized in that the bypass assembly also includes a foam guide plate (25) arranged above the outlets of the scattered bypass plates (23). 6. De compacte harkloze concentratie-inrichting volgens conclusie 5, met het kenmerk dat ontschuimingsgebieden en het inwendige oppervlak van de middentank (21) door een aantal verbindingsstangen (32) met elkaar zijn verbonden, en het uiteinde van de schuimgeleidingsplaat (25) nabij de verbindingsstangen (32) met de bodems van de ontschuimingsgebieden is verbonden en in een afgesloten toestand wordt gehouden.The compact rakeless concentrator according to claim 5, characterized in that defoaming areas and the inner surface of the center tank (21) are connected to each other by a plurality of connecting rods (32), and the end of the foam guide plate (25) near the connecting rods (32) is connected to the bottoms of the defoaming areas and kept in a closed condition. 7. De compacte harkloze concentratie-inrichting volgens conclusie 3, met het kenmerk dat het het ontschuimingsgebied een eerste omleidingsbezinkingsscherm en ontschuimers omvat die zich in de bezinkingspositie boven het eerste omleidingsbezinkingsscherm bevinden, waarbij de ontschuimer een hamereenheid en een aandrijfeenheid omvat, waarbij de hamerunit een hamer-ontschuimingsplaat (343), verzamelwastrog (347) voor schone kolen en een hamerhefboom (344) omvat, waarbij de hamer-ontschuimingsplaat (343) aan een uiteinde van de hamerhefboom (344) scharnierend is bevestigd, waarbij een dragereenheid op het eerste omleidingsbezinkingsscherm is bevestigd, waarbij het andere uiteinde van de hamerhefboom (344) scharnierend op de dragereenheid is bevestigd, waarbij de verzamelwastrog (347) voor schone kolen op zijplaten (321) van het eerste omleidingsbezinkingsscherm is bevestigd, waarbij een uiteinde van de aandrijfeenheid aan de dragereenheid is bevestigd, en het andere uiteinde verbonden is met het middendeel van de hamerhefboom (344).The compact rakeless concentrator according to claim 3, characterized in that the defoamer area comprises a first bypass settling screen and defoamers located in the settling position above the first bypass settling screen, the defoamer comprising a hammer unit and a drive unit, the hammer unit having a hammer defoaming plate (343), clean coal collecting washing trough (347) and a hammer lever (344), the hammer defoaming plate (343) being hinged to one end of the hammer lever (344), a carrier unit on the first bypass settling screen wherein the other end of the hammer lever (344) is pivotally mounted to the carrier unit, wherein the clean coal collecting wash trough (347) is mounted to side plates (321) of the first bypass settling screen, one end of the drive unit to the carrier unit is attached, and the other end is connected m with the center part of the hammer lever (344). 8. De compacte harkloze concentratie-inrichting volgens conclusie 7, met het kenmerk dat het eerste omleidingsbezinkingsscherm een eerste omleidingsgebied omvat dat aan beide zijden wordt ingesloten door zijplaten {321) en door lager gelegen plaatlichamen (320), waarbij de lager gelegen plaatlichamen (320) en een eerste onderstroomafgiftebuis (331) daaronder door een eerste afgifteklep (332) worden geleid, en hooggeplaatste platen (322)The compact rakeless concentrator according to claim 7, characterized in that the first bypass settling screen comprises a first bypass region enclosed on both sides by side plates {321) and lower plate bodies (320), the lower plate bodies (320 ) and a first underflow dispensing tube (331) passed therebelow through a first dispensing valve (332), and raised plates (322) en laaggeplaatste platen (323) aan beide zijden afwisselend tussen de zijplaten (321) zijn gerangschikt.and low-positioned plates (323) on both sides are arranged alternately between the side plates (321). 9. De compacte harkloze concentratie-inrichting volgens conclusie 8, met het kenmerk dat afbuiginrichtingen (324) voor plotselinge samentrekking en expansie op de tegenover elkaar gelegen oppervlakken van de hooggeplaatste platen (322) en de laaggeplaatste platen (323) zijn gerangschikt.The compact rakeless concentrator according to claim 8, characterized in that deflectors (324) for sudden contraction and expansion are arranged on the opposing surfaces of the upper plates (322) and the lower plates (323). 10. De compacte harkloze concentratie-inrichting volgens conclusie 4, met het kenmerk dat de door magnetisme geconcentreerde sproeiwerper een tweede door magnetisme geconcentreerde uitwerpbuis (361), een tweede toevoerbuis (362) voor magnetisch poeder en een tweede verdeler (363) omvat, waarbij het boven gelegen uiteinde van de tweede door magnetisme geconcentreerde uitwerppijp (361) in verbinding staat met de straaltoevoerbuis (22}, waarbij het lager gelegen uiteinde in verbinding staat met de tweede verdeler (363), waarbij een uiteinde van de tweede toevoerbuis (362) voor magnetisch poeder verbonden is met de buis bij het toevoerpunt van magnetisch poeder, en het andere uiteinde in verbinding staat met de tweede door magnetisme geconcentreerde uitwerpbuis (361).The compact rakeless concentrator according to claim 4, characterized in that the magnetism concentrated sprayer comprises a second magnetism concentrated ejection tube (361), a second magnetic powder supply tube (362) and a second distributor (363), wherein the upper end of the second magnetically concentrated ejector pipe (361) communicates with the jet feed tube (22}, the lower end communicates with the second distributor (363), one end of the second feed tube (362) magnetic powder is connected to the tube at the magnetic powder feed point, and the other end communicates with the second magnetism-concentrated ejection tube (361).
NL2026347A 2019-12-13 2020-08-26 Compact Rake-less Concentration Device NL2026347B1 (en)

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