CN103657186B - A kind of screening plant for particulate dehydration - Google Patents

A kind of screening plant for particulate dehydration Download PDF

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Publication number
CN103657186B
CN103657186B CN201310683854.XA CN201310683854A CN103657186B CN 103657186 B CN103657186 B CN 103657186B CN 201310683854 A CN201310683854 A CN 201310683854A CN 103657186 B CN103657186 B CN 103657186B
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China
Prior art keywords
screen cloth
hollow column
screening plant
plant according
spiral
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CN201310683854.XA
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CN103657186A (en
Inventor
蒋涵元
王飞跃
宋万军
马涛
孙常松
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China Shenhua Energy Co Ltd
Shenhua Shendong Coal Group Co Ltd
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China Shenhua Energy Co Ltd
Shenhua Shendong Coal Group Co Ltd
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Abstract

The present invention discloses a kind of screening plant for particulate dehydration, comprises hollow column and is looped around the spiral screen assembly of described hollow column outer surface from the top down; Described spiral screen assembly comprises screen cloth and is positioned at the housing below described screen cloth, forms filtrate channel, described hollow column offers filtrate hole with the joint of described housing between described screen cloth and described housing.The present invention, owing to have employed spiral screen assembly, makes material be rotated through from the top down along spiral screen cloth, carries out processed.The present invention without the need to power set, area occupied is little, cost is low, dehydration rate is high.

Description

A kind of screening plant for particulate dehydration
Technical field
The present invention relates to dewater unit, particularly relate to a kind of screening plant for particulate dehydration.
Background technology
In the industrial production, often need to carry out dewatering operation to fine, particulate dehydration mainly comprises mechanical dehydration, gravity dehydration and heat dehydration three kinds.Mechanical dehydration comprises screening and dewatering, centrifugal dehydration and filtering means dehydration.Gravity dehydration comprises natural gravity dehydration and gravity concentration dehydration, and heat dehydration comprises Thermal dehydration etc.Gravity dehydration and mechanical dehydration are the two kinds of dewaterings generally used, and the sieving machine dehydration especially in mechanical dehydration, uses common especially.Heat dehydration is compared other two kinds of dewatering types, and its dehydrating effect is good, and product moisture is low, but heat dehydration needs to expend higher energy, infrequently uses in a lot of on-the-spot application link.
In existing sieving machine dewatering operation, high-frequency screen and the sieve bend using vibration, these sieves have fixed pattern more.The operation principle of high-frequency screen is in screen(ing) machine vibration processes, make the coarse grain in sieve upper bed layer sink to forming filtering layer, retain particulate and remove moisture, it requires that sieve aperture retains the maximum particle size in pan feeding, feed thickness is high, coarse grain first forms filtering layer, retain particulate, the size of oscillation intensity is wanted to ensure that coarse grain remains on lower floor.The screening and dewatering effect of high-frequency screen is better, but it needs stronger power, but also will occupy larger area, and the quality of screening effect and the concentration relationship of pan feeding are closely.Sieve bend area occupied is relatively little, but fixes because of sieve bend size, and the main dissection by compass screen surface is dewatered, large by influence factors such as feed thickness, speed, granularmetric compositions, restive, be very easy to channeling water in using, be difficult to ensure product moisture, be unfavorable for subsequent job.
Above-described fine dewatering screen separating device, also exists following shortcoming:
(1) need to adopt power-equipment to provide larger exciting force, energy consumption is higher;
(2) form of screening plant is fixed;
(3) influence factor is many, restive;
(4) area occupied is large, adds capital expenditure cost.
Therefore, be necessary to design the particulate dewatering screen separating device that a kind of energy consumption is low, convenience regulates, influence factor is few, cost is low, dehydration rate is high.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, low, the convenient adjustment of a kind of energy consumption, the screening plant for particulate dehydration that influence factor is few, cost is low, dehydration rate is high are provided.
Technical scheme of the present invention provides a kind of screening plant for particulate dehydration, comprises hollow column and is looped around the spiral screen assembly of described hollow column outer surface from the top down;
Described spiral screen assembly comprises screen cloth and is positioned at the housing below described screen cloth, forms filtrate channel, described hollow column offers filtrate hole with the joint of described housing between described screen cloth and described housing.
Preferably, described housing comprises base plate and side plate, and the inner edge of described screen cloth is fixed on the outer surface of described hollow column, and the outer rim of described screen cloth is fixed on the junction of described side plate and described base plate.
Preferably, described spiral screen assembly is one deck around described hollow column 360 degree, and described screening plant comprises at least spiral screen assembly described in one deck.
Preferably, the head end of described screen cloth is connected with inlet valve, and the tail end of described screen cloth is connected with blow-off valve.
Preferably, the central axis of described hollow column overlaps with the center line of described spiral screen assembly.
Preferably, the bottom of described hollow column is connected with drainage channel.
Preferably, the outer rim sieve aperture of described screen cloth is greater than the inner edge sieve aperture of described screen cloth.
Preferably, the center line of the sieve aperture of described screen cloth and the central axis of described hollow column are parallel to each other.
Preferably, the tail end of described screen cloth adds material interceptor.
After adopting technique scheme, there is following beneficial effect: the present invention, owing to have employed spiral screen assembly, makes material be rotated through from the top down along spiral screen cloth, carries out processed.The present invention without the need to power set, area occupied is little, cost is low, dehydration rate is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of the screening plant comprising individual layer spiral screen assembly in one embodiment of the invention;
Fig. 2 is the structural representation of the screening plant comprising three helical layer screen assemblies in another embodiment of the present invention.
The Reference numeral table of comparisons:
1---hollow column 2---spiral screen assembly
11---filtrate hole 21---screen cloth 22---filtrate channels
23---base plate 24---side plate
Detailed description of the invention
The specific embodiment of the present invention is further illustrated below in conjunction with accompanying drawing.
It is the structural representation of the screening plant comprising individual layer spiral screen assembly see Fig. 1, Fig. 1.Screening plant for particulate dehydration comprises hollow column 1 and is looped around the spiral screen assembly 2 of hollow column 1 outer surface from the top down.The housing that spiral screen assembly 2 comprises screen cloth 21 and is positioned at below screen cloth 21, forms filtrate channel 22, hollow column 1 offers filtrate hole 11 with the joint of housing between screen cloth 21 and housing.Spiral screen assembly 2 is one deck around hollow column 360 degree, and in the present embodiment, screening plant comprises one deck spiral screen assembly 2.
Preferably, as shown in Figure 2, screening plant includes three helical layer screen assemblies 2.According to product performance and customer demand, spiral screen assembly can also be 1/2 layer, or two-layer, or more layer.Requirement to product moisture can carrying out the number of plies of flexible modulation spiral screen assembly according to the character of the moisture of pan feeding, fine self and client, by changing the movement travel of material, and then reaching the object effectively regulating material moisture.
In the present embodiment, housing comprises base plate 23 and side plate 24, and the inner edge of screen cloth 21 is fixed on the outer surface of hollow column 1, and the outer rim of screen cloth 21 is fixed on the junction of side plate 24 and base plate 23.
Fine enters on screen cloth 21 from the arrow A Fig. 2, and fine is along screen cloth 21 rotational slide from the top down.In the process of sliding, the penetration by liquid screen cloth 21 in fine enters into filtrate channel 22, is accepted by base plate 23.Because base plate 23 and the junction of hollow column 1 offer filtrate hole 11, liquid enters into filtrate hole 11 from base plate 23, discharge in the direction of arrow C from the bottom of hollow column 1, the tail end that fine finally slides into screen cloth 21 is discharged along arrow B direction, thus realizes the dewatering operation of fine.
The present embodiment, due to without the need to power set, reduces cost.Screen apparatus can vertically increase or reduce spiral screen assembly, decreases floor space, decreases capital expenditure cost.
Preferably, the base plate 23 of housing and side plate 24 can be one-body molded.The cross section of housing is arc, and the outer rim of housing is higher than the inner edge of housing.
Preferably, the head end of screen cloth 21 is connected with inlet valve (not shown), and the tail end of screen cloth 21 is connected with blow-off valve (not shown).Inlet valve is for controlling speed and the amount of charging, and blow-off valve is for controlling speed and the amount of discharge.
In the present embodiment, as shown in Figure 1-2, the central axis 12 of hollow column 1 overlaps with the center line of spiral screen assembly 2.Distance between the outer rim of spiral screen cloth 21 and housing and central axis 12 is constant all the time.
Preferably; spiral screen assembly 2 can be irregular spirality; distance between the margin and center axis of screen cloth and housing can become large from the top down gradually; also can diminish gradually from the top down; also can time large time little, as long as all belong to protection scope of the present invention around hollow column 1 from the top down along hollow column 1.
Preferably, the bottom of hollow column 1 is connected with drainage channel (not shown), from the liquid that the bottom of hollow column 1 is discharged, drains through drainage channel.
Preferably, in order to enable fine discharge smoothly, the outer rim sieve aperture of screen cloth 21 is greater than the inner edge sieve aperture of screen cloth 21.Because material is slower the closer to the inner edge speed of service, centrifugal force is less, if inner edge sieve aperture is comparatively large, is unfavorable for the smooth discharge of material.But if whole sieve apertures of screen cloth 21 are all enough little, the impact of centrifugal force is just less, and inside and outside edge slot size can be identical in this case.
Preferably, the center line of the sieve aperture of screen cloth 21 and the central axis 12 of hollow column 1 are parallel to each other.Due to compass screen surface curl, material runs along compass screen surface on compass screen surface, and running orbit is curl also.When the center line of sieve aperture and the central axis 12 of hollow column 1 are parallel to each other, sieve aperture can be smaller to the resistance that material produces, and is conducive to material and discharges smoothly.If but sieve aperture is enough little, the impact of frictional force is just less, and the impact of discharging material of the direction of sieve aperture just not quite in this case.
Preferably, the tail end of screen cloth 21 adds material interceptor (not shown).Dehydration, sorting integrated effect can be realized.
The present invention has the following advantages:
(1) do not need to arrange vibrating device, reduce the consumption of energy, improve the overall economic efficiency of fine dehydration, and do not produce noise.
(2) do not need moving component, be easy to operation and maintenance.
(3) the on-the-spot current existing height of particulate dehydration can be made full use of, reduce floor space.
(4) size of screen size can require to regulate depending on desired particle size, and the flexibility of sieve screening materials carrying is very strong.
(5) sweetly disposition can be carried out according to the feature of pan feeding and client to the requirement of product, the number of plies of increase and decrease spiral screen assembly.
(6) if install material interceptor additional at discharge end, this equipment can realize dehydration, sorting integrated effect, namely, partial density the closer to hollow column is higher, partial density the closer to outer rim is larger, if at coal field, then lower the closer to middle standing pillar part of ash, higher the closer to peripheral edge portion ash content.
Above-described is only principle of the present invention and preferred embodiment.It should be pointed out that for the person of ordinary skill of the art, on the basis of the principle of the invention, other modification some can also be made, or install miscellaneous part additional, also should be considered as protection scope of the present invention.

Claims (9)

1. for a screening plant for particulate dehydration, it is characterized in that, comprise hollow column and be looped around the spiral screen assembly of described hollow column outer surface from the top down;
Described spiral screen assembly comprises screen cloth and is positioned at the housing below described screen cloth, forms filtrate channel, described hollow column offers filtrate hole with the joint of described housing between described screen cloth and described housing.
2. screening plant according to claim 1, is characterized in that, described housing comprises base plate and side plate, and the inner edge of described screen cloth is fixed on the outer surface of described hollow column, and the outer rim of described screen cloth is fixed on the junction of described side plate and described base plate.
3. screening plant according to claim 1, is characterized in that, described spiral screen assembly is one deck around described hollow column 360 degree, and described screening plant comprises at least spiral screen assembly described in one deck.
4. screening plant according to claim 1, is characterized in that, the head end of described screen cloth is connected with inlet valve, and the tail end of described screen cloth is connected with blow-off valve.
5. screening plant according to claim 1, is characterized in that, the central axis of described hollow column overlaps with the center line of described spiral screen assembly.
6. screening plant according to claim 1, is characterized in that, the bottom of described hollow column is connected with drainage channel.
7. screening plant according to claim 1, is characterized in that, the outer rim sieve aperture of described screen cloth is greater than the inner edge sieve aperture of described screen cloth.
8. screening plant according to claim 1, is characterized in that, the center line of the sieve aperture of described screen cloth and the central axis of described hollow column are parallel to each other.
9. screening plant according to claim 1, is characterized in that, the tail end of described screen cloth adds material interceptor.
CN201310683854.XA 2013-12-13 2013-12-13 A kind of screening plant for particulate dehydration Active CN103657186B (en)

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Application Number Priority Date Filing Date Title
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CN103657186B true CN103657186B (en) 2015-10-21

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106733649A (en) * 2016-12-05 2017-05-31 连云港华威硅微粉有限公司 Silicon powder screening machine based on nylon screen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3190450A (en) * 1962-08-06 1965-06-22 Phillips Petroleum Co Filter for a crystal purification column
CN87207361U (en) * 1987-08-01 1988-03-09 江西工业大学 Rocking screen for high-speed drying and screening material
US5034128A (en) * 1989-06-29 1991-07-23 Kamyr Aktiebolag Apparatus for dewatering pulp
CN2130106Y (en) * 1992-07-14 1993-04-21 陈启松 Continous constant pressure mocro porous tube crude and fine filting combined filter
CN102294324A (en) * 2011-06-15 2011-12-28 唐山市神州机械有限公司 Vertical fine-grained screening device and method
CN202683453U (en) * 2012-06-06 2013-01-23 王松正 Roller-type rotary spiral vibrating screen classifier

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3190450A (en) * 1962-08-06 1965-06-22 Phillips Petroleum Co Filter for a crystal purification column
CN87207361U (en) * 1987-08-01 1988-03-09 江西工业大学 Rocking screen for high-speed drying and screening material
US5034128A (en) * 1989-06-29 1991-07-23 Kamyr Aktiebolag Apparatus for dewatering pulp
CN2130106Y (en) * 1992-07-14 1993-04-21 陈启松 Continous constant pressure mocro porous tube crude and fine filting combined filter
CN102294324A (en) * 2011-06-15 2011-12-28 唐山市神州机械有限公司 Vertical fine-grained screening device and method
CN202683453U (en) * 2012-06-06 2013-01-23 王松正 Roller-type rotary spiral vibrating screen classifier

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