CN106847010A - A kind of coal float-sink test apparatus for demonstrating and method - Google Patents
A kind of coal float-sink test apparatus for demonstrating and method Download PDFInfo
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- CN106847010A CN106847010A CN201710259134.9A CN201710259134A CN106847010A CN 106847010 A CN106847010 A CN 106847010A CN 201710259134 A CN201710259134 A CN 201710259134A CN 106847010 A CN106847010 A CN 106847010A
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Abstract
The invention discloses a kind of coal float-sink test apparatus for demonstrating, including water tank, pulse pump, water pump and the case that drifts along, the bottom of water tank is connected by the first pipeline with the water inlet of pulse pump, the delivery port of pulse pump is connected by the second pipeline with the bottom of the case that drifts along, the bottom of water tank is connected by the 3rd pipeline with the water inlet of water pump, the delivery port of water pump is connected by the 4th pipeline with the top of the case that drifts along, the drift along top of case is provided with downflow weir, drift along and be provided with agitator in case, high density PVC granule, Midst density PVC granule and low-density PVC granule, float collecting box is provided with below downflow weir, the bottom of float collecting box is provided with return line, return line is provided with return valve, 3rd pipeline is provided with level stream non-return valve, second pipeline is provided with upper up-flow non-return valve.Present invention also offers a kind of method that coal float-sink test demonstration is carried out using the device.With low cost, the safe, intuitive of the present invention is strong, strong applicability, easy to operate.
Description
Technical field
The invention belongs to coal float-sink test technical field, and in particular to a kind of coal float-sink test apparatus for demonstrating and side
Method.
Background technology
When bulk material is placed in the heavy-fluid of certain density, according to Archimedes' principle, density is more than heavy-fluid density
Particle will sink (hypostasis), and density then floats (float) less than the particle of heavy-fluid density, and density is close or identical with heavy-fluid density
Particle will be in suspended state.For coal separation, there is very strong correlation between coal density and quality, this is also to use
Gravity separation obtains the foundation of better quality head coal product.According to above-mentioned principle, using special instrument different densities weight
The experiment as floating experiment of different densities material is picked up in liquid.
Float-sink test is one of experiment of most Instructing manufacture effect to washing process such as jigging, dense media, to have
Effect ground Instructing manufacture, determines raw coal property, general to require monthly at least to carry out the beginning of the month, the end of month more than twice floating to entering to wash raw coal
Heavy experiment, needs to increase test number (TN) if the larger situation of ature of coal fluctuation is met.In order that test data more presses close to reality
Border situation, experiment coal amount requirement coal sample is in more than 200kg every time, and otherwise error of test data is larger.Therefore, coal float-sink test
It is one of most basic most important experiment of Concentrating Field, is the experiment that coal preparation technology Specialties must be grasped.
Current coal float-sink test is artificial operation, and test(ing) medium is that heavy-fluid is generally matched somebody with somebody using the zinc chloride of severe corrosive
Put, therefore, in the preparation of heavy-fluid and when being tested, in order to avoid zinc chloride is contacted with skin, clothes, it is necessary to wear rubber boot, wear
Mouth mask, wear rubber gloves and safety goggles and be rubber apron etc.；Meanwhile, test tool such as heavy-fluid bucket, net bottom bucket etc. compare
Heaviness, the amount of labour is very big in process of the test.
When the teaching of coal float-sink test is carried out, student is more, for the craving to knowledge, often gathers and is grasped in experiment
Make center, during student's primary learning, operate not familiar unskilled, easily cause heavy-fluid medium spluttering, and the zinc chloride weight of severe corrosive
If liquid spills the student's skin for gathering together even on the face, serious security incident can be caused.Meanwhile, existing behaviour
It is unfavorable for that the directly perceived of knowledge teaches as form, the bucket for holding heavy-fluid is often stainless steel, and coal can make chlorination in itself
Zinc heavy-fluid becomes cloudy, therefore existing operating operation test device and method, student cannot be visually observed that coal in heavy-fluid point
Layer phenomenon, the principle and key points for operation cognitive-ability to testing be not high.
The content of the invention
It is an object of the invention to overcome above-mentioned deficiency of the prior art, there is provided a kind of with low cost, safe, straight
The property seen is strong, strong applicability, coal float-sink test apparatus for demonstrating easy to operate and method.
To achieve the above object, the technical solution adopted by the present invention is：A kind of coal float-sink test apparatus for demonstrating, its feature
It is：Including water tank, pulse pump, water pump and the case that drifts along, the bottom of the water tank is by the first pipeline and the water inlet of pulse pump
It is connected, the delivery port of the pulse pump is connected by the second pipeline with the bottom of the case that drifts along, the bottom of the water tank passes through the 3rd
Pipeline is connected with the water inlet of water pump, and the delivery port of the water pump is connected by the 4th pipeline with the top of the case that drifts along, described floating
The top of caisson is provided with downflow weir, be provided with the case that drifts along agitator, high density PVC granule, Midst density PVC granule and
Low-density PVC granule, is provided with float collecting box below the downflow weir, the bottom of the float collecting box is provided with backflow
Pipeline, is provided with return valve on the return line, level stream non-return valve, second pipe are provided with the 3rd pipeline
Upper up-flow non-return valve is provided with road.
A kind of above-mentioned coal float-sink test apparatus for demonstrating, it is characterised in that：The high density PVC granule, Midst density PVC
The quantity of particle and low-density PVC granule is multiple, and the density of the high density PVC granule is 1.1kg/L~1.2kg/L,
The density of the Midst density PVC granule is 1.0kg/L, and the density of the low-density PVC granule is 0.8kg/L~0.9kg/L.
A kind of above-mentioned coal float-sink test apparatus for demonstrating, it is characterised in that：The high density PVC granule, Midst density PVC
The granularity of particle and low-density PVC granule is 13mm~25mm.
A kind of above-mentioned coal float-sink test apparatus for demonstrating, it is characterised in that：Set in the bottom of the float collecting box
There is the first screen cloth, the second screen cloth is provided with the bottom of the case that drifts along.
A kind of above-mentioned coal float-sink test apparatus for demonstrating, it is characterised in that：The sieve of first screen cloth and the second screen cloth
Bore dia is 0.5mm.
A kind of above-mentioned coal float-sink test apparatus for demonstrating, it is characterised in that：The 4th pipeline being connected with the case that drifts along
One end and downflow weir be oppositely arranged.
A kind of above-mentioned coal float-sink test apparatus for demonstrating, it is characterised in that：The water tank, drift along case and float collecting box
It is transparent organic glass case.
A kind of above-mentioned coal float-sink test apparatus for demonstrating, it is characterised in that：The high density PVC granule is that black is highly dense
Degree PVC granule, the Midst density PVC granule is grey Midst density PVC granule, and the low-density PVC granule is white low density
PVC granule.
In addition, present invention also offers a kind of method that coal float-sink test demonstration is carried out using said apparatus, its feature
It is that the method is comprised the following steps：
Step one, by water tank topped up with water, high density PVC granule, Midst density PVC granule and low-density PVC granule are given
Enter in the case that drifts along；
Step 2, upper up-flow non-return valve is opened, starting impulse pump, during the water in water tank fed into the case that drifts along, when water is arrived
Pulse pump is closed during up to downflow weir；
Step 3, startup agitator, stirring at low speed are closed agitator, stand 3~5 minutes after 3~5 minutes, made different close
The PVC granule of degree is in the case that drifts along by density stratification；
Step 4, unlatching level stream non-return valve, start water pump and pulse pump, float on low-density PVC of the case water surface that drifts along
Grain is subject to the level stream flushing of water pump and the upper up-flow of pulse pump to rinse compound action and pass through downflow weir and be expelled to float collection
In case；
Step 5, unlatching return valve, then by return line, oneself flow in water tank the water in float collecting box, will be low close
Degree PVC granule takes out collection from float collecting box, so as to complete coal float-sink test presentation process.
A kind of above-mentioned coal float-sink test demenstration method, it is characterised in that：The stirring of agitator described in step 3 turns
Speed is 50r/min~150r/min.
The present invention has advantages below compared with prior art：
1st, simple structure of the present invention, reasonable in design and using easy to operate.
2nd, the present invention adds agitator in the case that drifts along, and with reference to pulse water flow effect, is layered instead of artificial stirring, operation side
Just.
3rd, replace the zinc chloride heavy-fluid of severe corrosive in pilot demonstration plant running of the present invention with water, imparted knowledge to students or demonstrated
When, safe operation, and saved the cost of purchase medicament.
4th, the present invention carries out float-sink test demonstration with the PVC granule of different densities instead of coal, pollution-free to medium, demonstration
Property it is strong, and repeatable utilize.
5th, water tank of the present invention, the case that drifts along, float collecting box are lucite material, convenient observation lamination.
6th, the present invention is easy to make, it is easy to install, low cost.
In sum, the present invention replaces the zinc chloride heavy-fluid of severe corrosive with water, safe and reliable；With the PVC of different densities
Particle replaces coal, and simulation carries out float-sink test, can be properly arrived at demonstrating effect, also repeats and utilizes, and economizes on resources.It is logical
Crossing the present apparatus carries out teaching or the principle demonstration use of coal float-sink test, can intuitively demonstrate the delaminating process that drifts along of coal, pacifies
Overall coefficient is high, low cost.
Below by drawings and Examples, the present invention is described in further detail.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Description of reference numerals:
1-water tank；2-return line；3-return valve；
4-float collecting box；5-downflow weir；6-agitator；
7-drift along case；8-high density PVC granule；9-Midst density PVC granule；
10-low-density PVC granule；11-the first pipeline；12-pulse pump；
13-the second pipeline；14-the three pipeline；15-water pump；
16-the four pipeline；17-level stream non-return valve；18-upper up-flow non-return valve；
19-the first screen cloth；20-the second screen cloth.
Specific embodiment
The present invention is described to coal float-sink test apparatus for demonstrating by embodiment 1.
Embodiment 1
A kind of coal float-sink test apparatus for demonstrating as shown in Figure 1, including water tank 1, pulse pump 12, water pump 15 and the case that drifts along
7, the bottom of the water tank 1 is connected by the first pipeline 11 with the water inlet of pulse pump 12, and the delivery port of the pulse pump 12 leads to
Cross the second pipeline 13 to be connected with the bottom of the case 7 that drifts along, the bottom of the water tank 1 is by the 3rd pipeline 14 and the water inlet of water pump 15
It is connected, the delivery port of the water pump 15 is connected by the 4th pipeline 16 with the top of the case 7 that drifts along, and the top for drifting along case 7 sets
Downflow weir 5 is equipped with, agitator 6, high density PVC granule 8, Midst density PVC granule 9 and low-density are provided with the case 7 that drifts along
PVC granule 10, the lower section of the downflow weir 5 is provided with float collecting box 4, and the bottom of the float collecting box 4 is provided with backflow
Pipeline 2, is provided with return valve 3 on the return line 2, be provided with level stream non-return valve 17 on the 3rd pipeline 14, institute
State and be provided with upper up-flow non-return valve 18 on the second pipeline 13.
In the present embodiment, the quantity of the high density PVC granule 8, Midst density PVC granule 9 and low-density PVC granule 10 is equal
It is multiple, the density of the high density PVC polyvinyl chloride particles 8 is 1.1kg/L~1.2kg/L, the Midst density PVC granule 9
Density be 1.0kg/L, the density of the low-density PVC granule 10 is 0.8kg/L~0.9kg/L；The high density PVC granule
8th, the granularity of Midst density PVC granule 9 and low-density PVC granule 10 is 13mm~25mm.
In the present embodiment, the first screen cloth 19, the bottom of the case 7 that drifts along are provided with the bottom of the float collecting box 4
Inside it is provided with the second screen cloth 20；The sieve diameter of the screen cloth 20 of first screen cloth 19 and second is 0.5mm.
In the present embodiment, the one end for the 4th pipeline 16 being connected with the case 7 that drifts along and downflow weir 5 are oppositely arranged.
In the present embodiment, the water tank 1, case 7 is drifted along and float collecting box 4 is transparent organic glass case, in demonstration
During be easy to observation of students.
In the present embodiment, the high density PVC granule 8 is black high density PVC granule, and the Midst density PVC granule 9 is
Grey Midst density PVC granule, the low-density PVC granule 10 is white low density PVC granule, the PVC granule face of different densities
Color is different, good differentiation so more directly perceived, is easy to experimental observation.
The present invention is described to coal float-sink test demenstration method by embodiment 2 to 8.
Embodiment 2
With reference to Fig. 1, the present embodiment using device as described in Example 1 carry out coal float-sink test demonstration method include with
Lower step：
Step one, by the topped up with water of water tank 1, by high density PVC granule 8, Midst density PVC granule 9 and low-density PVC granule 10
In feeding the case 7 that drifts along；
Step 2, upper up-flow non-return valve 18 is opened, starting impulse pump 12, during the water in water tank 1 to feed the case 7 that drifts along,
Pulse pump 12 is closed when water reaches downflow weir 5；
Step 3, startup agitator 6, stirring at low speed are closed agitator 6, stand 3 minutes after 4 minutes, make different densities
PVC granule is floated on upper strata, the Midst density PVC granule of the case 7 that drifts along in the case 7 that drifts along by density stratification, i.e. low-density PVC granule 10
9 are suspended in the bottom that the middle part of the case 7 that drifts along, high density PVC granule 8 then sink to the case 7 that drifts along；The stirring of the agitator 6 turns
Speed is 100r/min；
Step 4, unlatching level stream non-return valve 17, start water pump 15 and pulse pump 12, float on the low close of the water surface of case 7 that drift along
Degree PVC granule 10 is subject to the level stream flushing of water pump 15 and the upper up-flow of pulse pump 12 to rinse compound action and pass through downflow weir 5
It is expelled in float collecting box 4, it is achieved thereby that the delaminating process of coal and float discharge process in coal float-sink test；
Step 5, unlatching return valve 3, then by return line 2, oneself flow in water tank 1 water in float collecting box 4, will
Low-density PVC granule 10 takes out collection from float collecting box 4, so as to complete coal float-sink test presentation process.
In the present embodiment, the water in float collecting box 4 flow to water tank 1 certainly through after the first screen cloth 19 by return line 2
In.
Embodiment 3
With reference to Fig. 1, the present embodiment using device as described in Example 1 carry out coal float-sink test demonstration method include with
Lower step：
Step one, by the topped up with water of water tank 1, by high density PVC granule 8, Midst density PVC granule 9 and low-density PVC granule 10
In feeding the case 7 that drifts along；
Step 2, upper up-flow non-return valve 18 is opened, starting impulse pump 12, during the water in water tank 1 to feed the case 7 that drifts along,
Pulse pump 12 is closed when water reaches downflow weir 5；
Step 3, startup agitator 6, stirring at low speed are closed agitator 6, stand 4 minutes after 3 minutes, make different densities
PVC granule is floated on upper strata, the Midst density PVC granule of the case 7 that drifts along in the case 7 that drifts along by density stratification, i.e. low-density PVC granule 10
9 are suspended in the bottom that the middle part of the case 7 that drifts along, high density PVC granule 8 then sink to the case 7 that drifts along；The stirring of the agitator 6 turns
Speed is 50r/min；
Step 4, unlatching level stream non-return valve 17, start water pump 15 and pulse pump 12, float on the low close of the water surface of case 7 that drift along
Degree PVC granule 10 is subject to the level stream flushing of water pump 15 and the upper up-flow of pulse pump 12 to rinse compound action and pass through downflow weir 5
It is expelled in float collecting box 4, it is achieved thereby that the delaminating process of coal and float discharge process in coal float-sink test；
Step 5, unlatching return valve 3, then by return line 2, oneself flow in water tank 1 water in float collecting box 4, will
Low-density PVC granule 10 takes out collection from float collecting box 4, so as to complete coal float-sink test presentation process.
In the present embodiment, the water in float collecting box 4 flow to water tank 1 certainly through after the first screen cloth 19 by return line 2
In.
Embodiment 4
With reference to Fig. 1, the present embodiment using device as described in Example 1 carry out coal float-sink test demonstration method include with
Lower step：
Step one, by the topped up with water of water tank 1, by high density PVC granule 8, Midst density PVC granule 9 and low-density PVC granule 10
In feeding the case 7 that drifts along；
Step 2, upper up-flow non-return valve 18 is opened, starting impulse pump 12, during the water in water tank 1 to feed the case 7 that drifts along,
Pulse pump 12 is closed when water reaches downflow weir 5；
Step 3, startup agitator 6, stirring at low speed are closed agitator 6, stand 4 minutes after 4 minutes, make different densities
PVC granule is floated on upper strata, the Midst density PVC granule of the case 7 that drifts along in the case 7 that drifts along by density stratification, i.e. low-density PVC granule 10
9 are suspended in the bottom that the middle part of the case 7 that drifts along, high density PVC granule 8 then sink to the case 7 that drifts along；The stirring of the agitator 6 turns
Speed is 100r/min；
Step 4, unlatching level stream non-return valve 17, start water pump 15 and pulse pump 12, float on the low close of the water surface of case 7 that drift along
Degree PVC granule 10 is subject to the level stream flushing of water pump 15 and the upper up-flow of pulse pump 12 to rinse compound action and pass through downflow weir 5
It is expelled in float collecting box 4, it is achieved thereby that the delaminating process of coal and float discharge process in coal float-sink test；
Step 5, unlatching return valve 3, then by return line 2, oneself flow in water tank 1 water in float collecting box 4, will
Low-density PVC granule 10 takes out collection from float collecting box 4, so as to complete coal float-sink test presentation process.
In the present embodiment, the water in float collecting box 4 flow to water tank 1 certainly through after the first screen cloth 19 by return line 2
In.
Embodiment 5
With reference to Fig. 1, the present embodiment using device as described in Example 1 carry out coal float-sink test demonstration method include with
Lower step：
Step one, by the topped up with water of water tank 1, by high density PVC granule 8, Midst density PVC granule 9 and low-density PVC granule 10
In feeding the case 7 that drifts along；
Step 2, upper up-flow non-return valve 18 is opened, starting impulse pump 12, during the water in water tank 1 to feed the case 7 that drifts along,
Pulse pump 12 is closed when water reaches downflow weir 5；
Step 3, startup agitator 6, stirring at low speed are closed agitator 6, stand 3 minutes after 5 minutes, make different densities
PVC granule is floated on upper strata, the Midst density PVC granule of the case 7 that drifts along in the case 7 that drifts along by density stratification, i.e. low-density PVC granule 10
9 are suspended in the bottom that the middle part of the case 7 that drifts along, high density PVC granule 8 then sink to the case 7 that drifts along；The stirring of the agitator 6 turns
Speed is 70r/min；
Step 4, unlatching level stream non-return valve 17, start water pump 15 and pulse pump 12, float on the low close of the water surface of case 7 that drift along
Degree PVC granule 10 is subject to the level stream flushing of water pump 15 and the upper up-flow of pulse pump 12 to rinse compound action and pass through downflow weir 5
It is expelled in float collecting box 4, it is achieved thereby that the delaminating process of coal and float discharge process in coal float-sink test；
Step 5, unlatching return valve 3, then by return line 2, oneself flow in water tank 1 water in float collecting box 4, will
Low-density PVC granule 10 takes out collection from float collecting box 4, so as to complete coal float-sink test presentation process.
In the present embodiment, the water in float collecting box 4 flow to water tank 1 certainly through after the first screen cloth 19 by return line 2
In.
Embodiment 6
With reference to Fig. 1, the present embodiment using device as described in Example 1 carry out coal float-sink test demonstration method include with
Lower step：
Step one, by the topped up with water of water tank 1, by high density PVC granule 8, Midst density PVC granule 9 and low-density PVC granule 10
In feeding the case 7 that drifts along；
Step 2, upper up-flow non-return valve 18 is opened, starting impulse pump 12, during the water in water tank 1 to feed the case 7 that drifts along,
Pulse pump 12 is closed when water reaches downflow weir 5；
Step 3, startup agitator 6, stirring at low speed are closed agitator 6, stand 5 minutes after 3 minutes, make different densities
PVC granule is floated on upper strata, the Midst density PVC granule of the case 7 that drifts along in the case 7 that drifts along by density stratification, i.e. low-density PVC granule 10
9 are suspended in the bottom that the middle part of the case 7 that drifts along, high density PVC granule 8 then sink to the case 7 that drifts along；The stirring of the agitator 6 turns
Speed is 100r/min；
Step 4, unlatching level stream non-return valve 17, start water pump 15 and pulse pump 12, float on the low close of the water surface of case 7 that drift along
Degree PVC granule 10 is subject to the level stream flushing of water pump 15 and the upper up-flow of pulse pump 12 to rinse compound action and pass through downflow weir 5
It is expelled in float collecting box 4, it is achieved thereby that the delaminating process of coal and float discharge process in coal float-sink test；
Step 5, unlatching return valve 3, then by return line 2, oneself flow in water tank 1 water in float collecting box 4, will
Low-density PVC granule 10 takes out collection from float collecting box 4, so as to complete coal float-sink test presentation process.
In the present embodiment, the water in float collecting box 4 flow to water tank 1 certainly through after the first screen cloth 19 by return line 2
In.
Embodiment 7
With reference to Fig. 1, the present embodiment using device as described in Example 1 carry out coal float-sink test demonstration method include with
Lower step：
Step one, by the topped up with water of water tank 1, by high density PVC granule 8, Midst density PVC granule 9 and low-density PVC granule 10
In feeding the case 7 that drifts along；
Step 2, upper up-flow non-return valve 18 is opened, starting impulse pump 12, during the water in water tank 1 to feed the case 7 that drifts along,
Pulse pump 12 is closed when water reaches downflow weir 5；
Step 3, startup agitator 6, stirring at low speed are closed agitator 6, stand 3 minutes after 4 minutes, make different densities
PVC granule is floated on upper strata, the Midst density PVC granule of the case 7 that drifts along in the case 7 that drifts along by density stratification, i.e. low-density PVC granule 10
9 are suspended in the bottom that the middle part of the case 7 that drifts along, high density PVC granule 8 then sink to the case 7 that drifts along；The stirring of the agitator 6 turns
Speed is 150r/min；
Step 4, unlatching level stream non-return valve 17, start water pump 15 and pulse pump 12, float on the low close of the water surface of case 7 that drift along
Degree PVC granule 10 is subject to the level stream flushing of water pump 15 and the upper up-flow of pulse pump 12 to rinse compound action and pass through downflow weir 5
It is expelled in float collecting box 4, it is achieved thereby that the delaminating process of coal and float discharge process in coal float-sink test；
Step 5, unlatching return valve 3, then by return line 2, oneself flow in water tank 1 water in float collecting box 4, will
Low-density PVC granule 10 takes out collection from float collecting box 4, so as to complete coal float-sink test presentation process.
In the present embodiment, the water in float collecting box 4 flow to water tank 1 certainly through after the first screen cloth 19 by return line 2
In.
Embodiment 8
With reference to Fig. 1, the present embodiment using device as described in Example 1 carry out coal float-sink test demonstration method include with
Lower step：
Step one, by the topped up with water of water tank 1, by high density PVC granule 8, Midst density PVC granule 9 and low-density PVC granule 10
In feeding the case 7 that drifts along；
Step 2, upper up-flow non-return valve 18 is opened, starting impulse pump 12, during the water in water tank 1 to feed the case 7 that drifts along,
Pulse pump 12 is closed when water reaches downflow weir 5；
Step 3, startup agitator 6, stirring at low speed are closed agitator 6, stand 4 minutes after 3 minutes, make different densities
PVC granule is floated on upper strata, the Midst density PVC granule of the case 7 that drifts along in the case 7 that drifts along by density stratification, i.e. low-density PVC granule 10
9 are suspended in the bottom that the middle part of the case 7 that drifts along, high density PVC granule 8 then sink to the case 7 that drifts along；The stirring of the agitator 6 turns
Speed is 130r/min；
Step 4, unlatching level stream non-return valve 17, start water pump 15 and pulse pump 12, float on the low close of the water surface of case 7 that drift along
Degree PVC granule 10 is subject to the level stream flushing of water pump 15 and the upper up-flow of pulse pump 12 to rinse compound action and pass through downflow weir 5
It is expelled in float collecting box 4, it is achieved thereby that the delaminating process of coal and float discharge process in coal float-sink test；
Step 5, unlatching return valve 3, then by return line 2, oneself flow in water tank 1 water in float collecting box 4, will
Low-density PVC granule 10 takes out collection from float collecting box 4, so as to complete coal float-sink test presentation process.
In the present embodiment, the water in float collecting box 4 flow to water tank 1 certainly through after the first screen cloth 19 by return line 2
In.
The above, is only presently preferred embodiments of the present invention, and not the present invention is imposed any restrictions, every according to the present invention
Any simple modification, change and equivalent structure transformation that technical spirit is made to above example, still fall within skill of the present invention
In the protection domain of art scheme.
Claims (10)
1. a kind of coal float-sink test apparatus for demonstrating, it is characterised in that：Including water tank (1), pulse pump (12), water pump (15) and floating
Caisson (7), the bottom of the water tank (1) is connected by the first pipeline (11) with the water inlet of pulse pump (12), the pulse pump
(12) delivery port is connected by the second pipeline (13) with the bottom of the case that drifts along (7), and the bottom of the water tank (1) is by the 3rd pipe
Road (14) is connected with the water inlet of water pump (15), and the delivery port of the water pump (15) passes through the 4th pipeline (16) and the case that drifts along (7)
Top be connected, the top of the case that drifts along (7) be provided with downflow weir (5), the case that drifts along (7) be provided with agitator (6),
High density PVC granule (8), Midst density PVC granule (9) and low-density PVC granule (10), the lower section of the downflow weir (5) are set
The bottom for having float collecting box (4), the float collecting box (4) is provided with return line (2), is set on the return line (2)
Return valve (3) is equipped with, level stream non-return valve (17) is provided with the 3rd pipeline (14), set on second pipeline (13)
It is equipped with upper up-flow non-return valve (18).
2. according to a kind of coal float-sink test apparatus for demonstrating described in claim 1, it is characterised in that：High density PVC
The quantity of grain (8), Midst density PVC granule (9) and low-density PVC granule (10) is multiple, the high density PVC granule (8)
Density be 1.1kg/L~1.2kg/L, the density of the Midst density PVC granule (9) is 1.0kg/L, low-density PVC
The density of grain (10) is 0.8kg/L~0.9kg/L.
3. according to a kind of coal float-sink test apparatus for demonstrating described in claim 1, it is characterised in that：High density PVC
The granularity of grain (8), Midst density PVC granule (9) and low-density PVC granule (10) is 13mm~25mm.
4. according to a kind of coal float-sink test apparatus for demonstrating described in claim 1, it is characterised in that：The float collecting box
(4) the first screen cloth (19) is provided with bottom, the second screen cloth (20) is provided with the bottom of the case that drifts along (7).
5. according to a kind of coal float-sink test apparatus for demonstrating described in claim 4, it is characterised in that：First screen cloth (19)
Sieve diameter with the second screen cloth (20) is 0.5mm.
6. according to a kind of coal float-sink test apparatus for demonstrating described in claim 1, it is characterised in that：With the case that drifts along (7)
One end of the 4th connected pipeline (16) and downflow weir (5) are oppositely arranged.
7. according to a kind of coal float-sink test apparatus for demonstrating described in claim 1, it is characterised in that：The water tank (1), drift along
Case (7) and float collecting box (4) are transparent organic glass case.
8. according to a kind of coal float-sink test apparatus for demonstrating described in claim 1, it is characterised in that：High density PVC
Grain (8) is black high density PVC granule, and the Midst density PVC granule (9) is grey Midst density PVC granule, the low-density
PVC granule (10) is white low density PVC granule.
9. a kind of method that coal float-sink test demonstration is carried out using device as claimed in claim 1, it is characterised in that the method
Comprise the following steps：
Step one, by water tank (1) topped up with water, by high density PVC granule (8), Midst density PVC granule (9) and low-density PVC granule
(10) in feeding the case that drifts along (7)；
Water in water tank (1) is fed the case that drifts along (7) by step 2, unlatching upper up-flow non-return valve (18), starting impulse pump (12)
In, pulse pump (12) is closed when water reaches downflow weir (5)；
Step 3, startup agitator (6), stirring at low speed close agitator (6) after 3~5 minutes, stand 3~5 minutes, make difference
The PVC granule of density is in the case that drifts along (7) by density stratification；
Step 4, unlatching level stream non-return valve (17), start water pump (15) and pulse pump (12), float on the case that drifts along (7) water surface
Low-density PVC granule (10) is rinsed by the level stream of water pump (15) and rinse compound action with the upper up-flow of pulse pump (12) and lead to
Downflow weir (5) is crossed to be expelled in float collecting box (4)；
Step 5, open return valve (3), then the water in float collecting box (4) water tank (1) is flow to by return line (2) certainly
In, low-density PVC granule (10) is taken out from float collecting box (4) and is collected, so as to complete coal float-sink test presentation process.
10. a kind of coal float-sink test demenstration method according to claim 9, it is characterised in that：Stirred described in step 3
The speed of agitator for mixing device (6) is 50r/min~150r/min.
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| CN108593876A (en) * | 2018-05-22 | 2018-09-28 | 中国神华能源股份有限公司 | A kind of float-sink test system and method |
| CN111359769A (en) * | 2020-03-30 | 2020-07-03 | 北京沄汇智能科技有限公司 | Coal floating and sinking separation system and method thereof |
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