AU2019425968A1 - Fully mechanized mining working face mine water resource utilization system and use method thereof - Google Patents
Fully mechanized mining working face mine water resource utilization system and use method thereof Download PDFInfo
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- AU2019425968A1 AU2019425968A1 AU2019425968A AU2019425968A AU2019425968A1 AU 2019425968 A1 AU2019425968 A1 AU 2019425968A1 AU 2019425968 A AU2019425968 A AU 2019425968A AU 2019425968 A AU2019425968 A AU 2019425968A AU 2019425968 A1 AU2019425968 A1 AU 2019425968A1
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- water
- heavy metal
- treatment region
- metal ion
- working face
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 316
- 238000005065 mining Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 95
- 238000001914 filtration Methods 0.000 claims abstract description 44
- 229920002472 Starch Polymers 0.000 claims abstract description 40
- 235000019698 starch Nutrition 0.000 claims abstract description 40
- 239000008107 starch Substances 0.000 claims abstract description 40
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000012991 xanthate Substances 0.000 claims abstract description 37
- 238000000746 purification Methods 0.000 claims abstract description 22
- 239000010802 sludge Substances 0.000 claims abstract description 16
- 239000008394 flocculating agent Substances 0.000 claims abstract description 10
- 150000002500 ions Chemical class 0.000 claims description 93
- 239000010865 sewage Substances 0.000 claims description 62
- 238000004519 manufacturing process Methods 0.000 claims description 30
- 229910052751 metal Inorganic materials 0.000 claims description 26
- 239000002184 metal Substances 0.000 claims description 26
- 239000012528 membrane Substances 0.000 claims description 17
- 238000005192 partition Methods 0.000 claims description 17
- 238000005086 pumping Methods 0.000 claims description 13
- 238000002955 isolation Methods 0.000 claims description 9
- 238000007792 addition Methods 0.000 claims description 7
- 238000001223 reverse osmosis Methods 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000008213 purified water Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 abstract description 6
- 239000008235 industrial water Substances 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 239000000428 dust Substances 0.000 description 13
- 239000003245 coal Substances 0.000 description 6
- 239000003673 groundwater Substances 0.000 description 5
- 229910021645 metal ion Inorganic materials 0.000 description 4
- 238000004064 recycling Methods 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 102100029469 WD repeat and HMG-box DNA-binding protein 1 Human genes 0.000 description 1
- 101710097421 WD repeat and HMG-box DNA-binding protein 1 Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
-
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Water Treatment By Sorption (AREA)
- Removal Of Specific Substances (AREA)
Abstract
A fully-mechanized coal-mining face mine shaft water resource utilization system, which is constituted by a coal-mining face wastewater and goaf area stagnant water collecting and purification system (5), a sludge treatment system, and a feedback control system. The mining-face wastewater and goaf area stagnant water collection and purification system (5) can be divided into four parts, namely a wastewater collecting area (17), a physical filtration area (14), a suspended matter treatment area (15), and a heavy metal ion treatment area (16). The sludge treatment system comprises a sludge suction pipe (32), a sludge pump (2), and a mechanical centrifuge (1). The feedback control system comprises an automatic control panel (3), a control line (34), an electric control valve, and a water pump. Also provided is a method for using the system, in which the pH of the suspended matter treatment area (15) is adjusted to 6-8, flocculants PAM and PAC are added, and starch xanthate is added to the heavy metal ion treatment area (16). This allows wastewater to be treated into industrial water and household water and achieves the goal of resource recovery and utilization of coal-mining face and goaf area wastewater.
Description
Fully Mechanized Mining Working Face Mine Water Resource Utilization
System and Use Method Thereof
Technical Field
The invention relates to the field of mine wastewater recycling, in particular to a fully
mechanized mining working face mine water resource utilization system and a use method
thereof
Background Art
In recent years, coal mining has gradually shifted from eastern China to central and western
China, and coal mining has destroyed the storage environment of groundwater, resulting in loss of
groundwater resources, causing increasing shortage of water resources in water-deficient areas in
western China. Longwall coal mining is the main coal mining method in China. After the
advancing of the working face, a space full of gaps is formed in the goaf, and water in the rock
strata and fissures will easily gather to the goaf and form goaf accumulated water.
After the advancing of the working face, fissures will inevitably appear in the roof and floor
of the goaf. The roof and floor fissures communicate the goaf with the adjacent confined aquifer,
and then water in the confined aquifer will enter the goaf and form accumulated water in the goaf.
A large amount of dust will be produced at the working face in the coal mining process. A working
face shearer and a working face support are provided with a spray dust reduction device, which
reduces dust in air by spraying and will produce a large amount of dust reduction sewage. There is
a shortage of water resources in northwest China. Mine production not only consumes a lot of
water resources, but also damages the original water resources. The main pollutants in goaf
accumulated water and working face dust reduction sewage are solid particles, suspended tiny
particles and heavy metal ions. After the pollutants in water are removed, the goaf accumulated
water and the production working face sewage are recycled, which not only saves water cost for
mine production, but also alleviates the shortage of water resources. The traditional sewage
treatment system can perform treatment only after water in the sump is pumped to the ground by a
water pump, which not only occupies a lot of land resources, but also increases the transportation
cost since clean water needs to be delivered to the underground when using water. Besides, the accumulated water in the goaf is not utilized, and the goaf accumulated water also brings potential pollution risks to the groundwater. Therefore, there is a need for a water treatment system that can perform resource utilization on the goaf accumulated water and the working face dust reduction sewage.
Summary of the Invention
An objective of the invention is to provide a fully mechanized mining working face mine
water resource utilization system and a use method thereof, in order to collect working face
sewage and goaf accumulated water and purify sewage into clean water meeting production water
and domestic water standards, thereby realizing resource utilization of fully mechanized mining
working face mine water.
In order to achieve the above objective, the technical solution of the invention is specifically
as follows:
The fully mechanized mining working face mine water resource utilization system includes a
working face sewage and goaf accumulated water collection and purification system 5, a silt
treatment system, a feedback control system, a domestic water delivery pipeline and a production
water delivery pipeline.
The working face sewage and goaf accumulated water collection and purification system 5
includes a roadway floor water channel 8, a gangue isolation metal grid 13, a horizontal partition
plate 21, vertical partition plates 23 and filtration metal grids 18, one end of the roadway floor
water channel 8 is located at a stopping line, and the other end is located at an open-off cut. The
gangue isolation metal grid 13 covers the roadway floor water channel 8. The horizontal partition
plate 21 is horizontally mounted in the roadway floor water channel 8 to divide the roadway floor
water channel 8 into an upper layer and a lower layer, the upper layer is a sewage collection region
17, the lower layer is a physical filtration region 14, a suspended matter treatment region 15 and a
heavy metal ion treatment region 16, and an opening is left at an end near the water channel. The
two vertical partition plates 23 divide the lower layer of the roadway floor water channel 8 into
three regions, namely the physical filtration region 14, the suspended matter treatment region 15
and the heavy metal ion treatment region 16. The plurality of filtration metal grids 18 with
different aperture sizes are vertically arranged in the physical filtration region 14.
A water pump 123 is arranged in the physical filtration region 14, and the water pump 123 is
configured to pump filtered water in the physical filtration region 14 into the suspended matter
treatment region 15. A microporous filter membrane 19, a pH detector 26 and a turbidity detector
25 are arranged in the suspended matter treatment region 15, a water pump 1124 is arranged in the
suspended matter treatment region 15, and the water pump 1124 is configured to pump purified
water into the heavy metal ion treatment region 16. A reverse osmosis membrane 20, a heavy
metal ion detector 135 and a heavy metal ion detector 1127 are arranged in the heavy metal ion
treatment region 16, the heavy metal ion detector 135 is arranged at a water inlet area of the heavy
metal ion treatment region 16, and the heavy metal ion detector 1127 is arranged at a water outlet
area of the heavy metal ion treatment region 16.
A production water outlet pipe 28 communicates with a water outlet area of the suspended
matter treatment region 15. A domestic water storage pipe 29 communicates with the water outlet
area of the heavy metal ion treatment region 16. The silt treatment system includes a silt pumping
pipe 32, a sludge pump 2 and a mechanical centrifuge 1, one end of the silt pumping pipe 32 is
respectively connected to a water inlet area of the suspended matter treatment region 15, the water
outlet area of the suspended matter treatment region 15 and the water inlet area of the heavy metal
ion treatment region 16 through a divaricated pipeline, and the other end of the silt pumping pipe
is connected to the sludge pump 2 arranged within the mining roadway stopping line. The sludge
pump 2 is connected to the mechanical centrifuge 1 through a pipeline, and sewage discharged
from the mechanical centrifuge 1 enters the sewage collection region 17 through a return pipe 33.
The feedback control system includes an automatic control console 3, control lines 34,
electronic control valves and water pumps, the automatic control console 3 is arranged within the
roadway stopping line, and the automatic control console 3 is respectively connected to an
electronic control valve 19, an electronic control valve 11 10, an electronic control valve III 11, an
electronic control valve IV 12, a water pump 1114, a water pump IV 23, a water pump V 24, the
heavy metal ion detector 1 35, the heavy metal ion detector 11 27, the pH detector 26 and the
turbidity detector 25 through the control lines 34. The heavy metal ion detector 135 is configured
to determine an amount of starch xanthate added, the pH detector 26 and the turbidity detector 25
are configured to determine whether water quality meets the water standard, and when the water
quality in the water outlet area does not meet the standard, the automatic control console automatically closes the electronic control valve 11 10, opens the electronic control valve IV 12 and turns on the water pump III 4 such that water in the suspended matter treatment region 15 returns to the sewage collection region 17. The heavy metal ion detector II 27 is configured to determine whether the water quality meets the water standard, and when the water quality in the water outlet area does not meet the standard, the automatic control console automatically closes the electronic control valve 19, opens the electronic control valve III 11 and turns on the water pump 111 4 such that water in the heavy metal ion treatment region 16 returns to the sewage collection region 17. The domestic water delivery pipeline is arranged in an underground roadway, one end of the domestic water delivery pipeline is connected to the water outlet area of the heavy metal ion treatment region 16 of the working face sewage and goaf accumulated water collection and purification system 5, and the other end is connected to a domestic water facility. The production water delivery pipeline is arranged in the underground roadway, one end is connected to the water outlet area of the suspended matter treatment region 15 of the working face sewage and goaf accumulated water collection and purification system 5, and the other end is respectively connected to production water places of the underground working face.
Further, the roadway floor water channel 8 has a width W that is 1/5 of a width of the
2(P+ Y) roadway, and a depth of D = , where P is an amount of sewage discharged into the
water channel within 1 minute in the working face; and Y is an amount of gushing water within 1
minute in the goaf.
Further, the number of the filtration metal grids 18 is 5, and the aperture sizes of the 5
filtration metal grids 18 are sequentially 106 um, 105 um, 104 um, 10' um and 102 um along a
water flow direction.
Further, a pore size of the microporous filter membrane 19 is 10 um.
A use method of a fully mechanized mining working face mine water resource utilization
system includes the following steps:
Si: enabling working face sewage and goaf accumulated water to naturally flow into a
roadway floor water channel 8 under the action of gravity, enabling the goaf accumulated water
and the working face sewage to flow into a sewage collection region 17 through a gangue isolation
metal grid 13 and then flow into a physical filtration region 14, and after filtration through physical staged filtration metal grids 18, pumping the filtered water into a suspended matter treatment region 15 through a water pump 23;
S2: after adding a pH regulator into the suspended matter treatment region 15 to regulate a
pH of the water to 6-8, adding PAM and PAC flocculants such that suspended solids react with the
PAM and PAC flocculants to generate precipitates, and after filtering the treated water through a
microporous filter membrane 19, enabling part of the water to enter a production water outlet pipe
28 and part of the water to be pumped into a heavy metal ion treatment region 16 through a water
pump 24; and
S3: in the heavy metal ion treatment region 16, reacting heavy metal ions in the water with
starch xanthate to generate precipitates, and enabling the treated water to enter a domestic water
storage pipe 29 after passing through a reverse osmosis membrane 20.
Further, a sequence of adding the treating agents in the suspended matter treatment region 15
is:
B1: adding the pH regulator through a pH regulator adding pipe 36 to regulate the pH of the
water to 6-8, and
B2: adding the PAC flocculant through a PAM and PAC flocculant adding pipe 30, and
finally adding the PAM treating agent, wherein the water pump 23 and the water pump 24 are
turned off in the process of adding the PAC and PAM flocculants; wherein a mass of the PAC
flocculant added is mpac 100q 2 t2 , and a mass of the PAM flocculant added is
mpa = 2q2 t2, where mpac is the mass of the PAC flocculant added in g; mp is the mass of
the PAM flocculant added in g; q2 is a flow rate of water in the suspended matter treatment region
in m3/h; and t2 is a time interval between two additions of the PAC flocculant in h.
Further, the method of adding the starch xanthate to the heavy metal ion treatment region 16
includes:
Adding the starch xanthate to the heavy metal ion treatment region 16 through a starch
xanthate adding pipe 31, wherein in the process of adding the starch xanthate, the water pump 23
and the water pump 24 are turned off, a molecular formula of the starch xanthate added is
crosslinked starch-O-CSS-Mg-SSC-crosslinked starch, a sulfur content of the starch xanthate is
8.14%, and a mass of the starch xanthate added is =6 x t x q, x c, , where m represents the
mass of the starch xanthate added in g; t represents a time interval between additions of the starch
xanthate in h; q represents a flow rate of the water in the heavy metal ion treatment region in m3 /h;
i represents the i-th type of heavy metal ions; and ci represents a concentration of the i-th type of
heavy metal ions in g/m.
Compared with the prior art, the invention has the following beneficial effects:
(1) After working face dust reduction sewage enters a working face dust reduction sewage
and goaf accumulated water collection and purification device and is treated, the treated water
enters a working face water tank through the production water delivery pipe, thereby achieving
recycling of working water.
(2) The goaf accumulated water is collected and purified by the working face dust reduction
sewage and goaf accumulated water collection and purification device, thereby basically
eliminating the potential pollution risks to the groundwater caused by the goaf accumulated water,
and realizing resource utilization of the goaf accumulated water.
(3) The sewage is purified into the production water and the domestic water, the domestic
water is delivered to the above-ground domestic water facility, and the production water is
delivered to the underground production water places, thereby enhancing the water purification
efficiency and alleviating the shortage of mine water.
Brief Description of the Drawings
FIG. 1 is a schematic view showing the arrangement of a fully mechanized mining working
face mine water resource utilization system;
FIG. 2 is a vertical sectional view of the fully mechanized mining working face mine water
resource utilization system in FIG. 1;
FIG. 3 is a horizontal sectional view of an upper layer of a roadway floor water channel in
FIG. 2; and
FIG. 4 is a horizontal sectional view of a lower layer of the roadway floor water channel in
FIG. 2.
Detailed Description of the Invention
The invention will be further described below with reference to the accompanying drawings.
Embodiment 1
As shown in FIGS. 1-4, a fully mechanized mining working face mine water resource
utilization system is disclosed. The fully mechanized mining working face mine water resource
utilization system includes a working face sewage and goaf accumulated water collection and
purification system 5, a silt treatment system, a feedback control system, a domestic water
delivery pipeline and a production water delivery pipeline.
The working face sewage and goaf accumulated water collection and purification system 5
includes a roadway floor water channel 8, a gangue isolation metal grid 13, a horizontal partition
plate 21, vertical partition plates 23 and filtration metal grids 18, one end of the roadway floor
water channel 8 is located at a stopping line, and the other end is located at an open-off cut. The
roadway floor water channel 8 has a width W that is 1/5 of a width of the roadway, and a depth of 2(P+ Y) D = 2P , where P is an amount of sewage discharged into the water channel within 1
minute in the working face; and Y is an amount of gushing water within 1 minute in the goaf.
The gangue isolation metal grid 13 covers the roadway floor water channel 8. The horizontal
partition plate 21 is horizontally mounted in the roadway floor water channel 8 to divide the
roadway floor water channel 8 into an upper layer and a lower layer, the upper layer is a sewage
collection region 17, the lower layer is a physical filtration region 14, a suspended matter
treatment region 15 and a heavy metal ion treatment region 16, and an opening is left at an end
near the water channel. The two vertical partition plates 23 divide the lower layer of the roadway
floor water channel 8 into three regions, namely the physical filtration region 14, the suspended
matter treatment region 15 and the heavy metal ion treatment region 16. The plurality of filtration
metal grids 18 with different aperture sizes are vertically arranged in the physical filtration region
14, and a pore size of a microporous filter membrane 19 is 10 um.
A water pump 123 is arranged in the physical filtration region 14, and the water pump 123 is
configured to pump filtered water in the physical filtration region 14 into the suspended matter
treatment region 15. The microporous filter membrane 19, a pH detector 26 and a turbidity
detector 25 are arranged in the suspended matter treatment region 15, a water pump II 24 is arranged in the suspended matter treatment region 15, and the water pump 1124 is configured to pump purified water into the heavy metal ion treatment region 16. A reverse osmosis membrane
20, a heavy metal ion detector 135 and a heavy metal ion detector 1127 are arranged in the heavy
metal ion treatment region 16, the heavy metal ion detector 135 is arranged at a water inlet area of
the heavy metal ion treatment region 16, and the heavy metal ion detector 1127 is arranged at a
water outlet area of the heavy metal ion treatment region 16.
A production water outlet pipe 28 communicates with a water outlet area of the suspended
matter treatment region 15. A domestic water storage pipe 29 communicates with the water outlet
area of the heavy metal ion treatment region 16. The silt treatment system includes a silt pumping
pipe 32, a sludge pump 2 and a mechanical centrifuge 1, one end of the silt pumping pipe 32 is
respectively connected to a water inlet area of the suspended matter treatment region 15, the water
outlet area of the suspended matter treatment region 15 and the water inlet area of the heavy metal
ion treatment region 16 through a divaricated pipeline, and the other end of the silt pumping pipe
is connected to the sludge pump 2 arranged within the mining roadway stopping line. The sludge
pump 2 is connected to the mechanical centrifuge 1 through a pipeline, and sewage discharged
from the mechanical centrifuge 1 enters the sewage collection region 17 through a return pipe 33.
The feedback control system includes an automatic control console 3, control lines 34,
electronic control valves and water pumps, the automatic control console 3 is arranged within the
roadway stopping line, and the automatic control console 3 is respectively connected to an
electronic control valve 19, an electronic control valve 11 10, an electronic control valve III 11, an
electronic control valve IV 12, a water pump 1114, a water pump IV 23, a water pump V 24, the
heavy metal ion detector 1 35, the heavy metal ion detector 11 27, the pH detector 26 and the
turbidity detector 25 through the control lines 34. The heavy metal ion detector 135 is configured
to determine an amount of starch xanthate added, the pH detector 26 and the turbidity detector 25
are configured to determine whether water quality meets the water standard, and when the water
quality in the water outlet area does not meet the standard, the automatic control console 3
automatically closes the electronic control valve 11 10, opens the electronic control valve IV 12
and turns on the water pump 111 4 such that water in the suspended matter treatment region 15
returns to the sewage collection region 17. The heavy metal ion detector 11 27 is configured to
determine whether the water quality meets the water standard, and when the water quality in the water outlet area does not meet the standard, the automatic control console automatically closes the electronic control valve 19, opens the electronic control valve III 11 and turns on the water pump 111 4 such that water in the heavy metal ion treatment region 16 returns to the sewage collection region 17. The domestic water delivery pipeline is arranged in an underground roadway, one end of the domestic water delivery pipeline is connected to the water outlet area of the heavy metal ion treatment region 16 of the working face sewage and goaf accumulated water collection and purification system 5, and the other end is connected to a domestic water facility. The production water delivery pipeline is arranged in the underground roadway, one end is connected to the water outlet area of the suspended matter treatment region 15 of the working face sewage and goaf accumulated water collection and purification system 5, and the other end is respectively connected to production water places of the underground working face. Further, the number of the filtration metal grids 18 is 5, and the aperture sizes of the 5 filtration metal grids 18 are sequentially 106 um, 105 um, 104 num, 10 um and 102 um along a water flow direction.
Embodiment 2
A method of treating sewage by using the fully mechanized mining working face mine water
resource utilization system in Embodiment 1 includes the following steps:
Si: enabling working face sewage and goaf accumulated water to naturally flow into a
roadway floor water channel 8 under the action of gravity, enabling the goaf accumulated water
and the working face sewage to flow into a sewage collection region 17 through a gangue isolation
metal grid 13 and then flow into a physical filtration region 14, and after filtration through
physical staged filtration metal grids 18, pumping the filtered water into a suspended matter
treatment region 15 through a water pump 23;
S2: after adding a pH regulator into the suspended matter treatment region 15 to regulate a
pH of the water to 6-8, adding PAM and PAC flocculants such that suspended solids react with the
PAM and PAC flocculants to generate precipitates, and after filtering the treated water through a
microporous filter membrane 19, enabling part of the water to enter a production water outlet pipe
28 and part of the water to be pumped into a heavy metal ion treatment region 16 through a water
pump 24; and
S3: in the heavy metal ion treatment region 16, reacting heavy metal ions in the water with
starch xanthate to generate precipitates, and enabling the treated water to enter a domestic water storage pipe 29 after passing through a reverse osmosis membrane 20.
A sequence of adding the treating agents in the suspended matter treatment region 15 is:
B1: adding the pH regulator through a pH regulator adding pipe 36 to regulate the pH of the
water to 6-8, and
B2: adding the PAC flocculant through a PAM and PAC flocculant adding pipe 30, and
finally adding the PAM treating agent, wherein the water pump 23 and the water pump 24 are
turned off in the process of adding the PAC and PAM flocculants; wherein a mass of the PAC
flocculant added is mpac 100q 2 t2 , and a mass of the PAM flocculant added is
mpa = 2q2 t2, where mpac is the mass of the PAC flocculant added in g; m, is the mass of
the PAM flocculant added in g; q2 is a flow rate of water in the suspended matter treatment region
in m3/h; and t2 is a time interval between two additions of the PAC flocculant in h.
The method of adding the starch xanthate to the heavy metal ion treatment region 16
includes:
Adding the starch xanthate to the heavy metal ion treatment region 16 through a starch
xanthate adding pipe 31, wherein in the process of adding the starch xanthate, the water pump 23
and the water pump 24 are turned off, a molecular formula of the starch xanthate added is
crosslinked starch-O-CSS-Mg-SSC-crosslinked starch, a sulfur content of the starch xanthate is
8.14%, and a mass of the starch xanthate added is m, =6x t x q , x where mrepresents the
mass of the starch xanthate added in g; t represents a time interval between additions of the starch
xanthate in h; q represents a flow rate of the water in the heavy metal ion treatment region in m3 /h;
i represents the i-th type of heavy metal ions; and ci represents a concentration of the i-th type of
heavy metal ions in g/m.
After working face dust reduction sewage enters a working face dust reduction sewage and
goaf accumulated water collection and purification device 22 and is treated, the treated water
enters a working face water tank through the production water delivery pipe, thereby achieving
recycling of working water. The goaf accumulated water is collected and purified by the working
face dust reduction sewage and goaf accumulated water collection and purification device 22,
thereby basically eliminating the potential pollution risks to the groundwater caused by the goaf
accumulated water, and realizing resource utilization of the goaf accumulated water. The sewage is purified into the production water and the domestic water, the domestic water is delivered to the above-ground domestic water facility, and the production water is delivered to the underground production water places, thereby enhancing the water purification efficiency and alleviating the shortage of mine water.
Embodiment 3
In this embodiment, a low-elevation mining roadway with a longwall working face along
strike is taken as an example for detailed description:
A width of the low-elevation mining roadway with a longwall working face along strike is 5
m, an amount Y of gushing water in the goaf behind the working face is 0.20 m3 /min, a flow rate P
of sewage discharged from the working face is 0.23 m3 /min, and heavy metal ions contained in the
gushing water in the goaf include Cu2, Zn2, Ni2+ and Cr2+. A concentration of the Cu2 is 10
mg/L, a concentration of the Zn2+ is 12 mg/L, a concentration of the Ni2+ is 6 mg/L, and a
concentration of the Cr2+ is 5 mg/L.
A roadway floor water channel 8 is excavated in the floor of the low-elevation roadway. The 2(P+ Y) _2(0.23 +0.2) water channel has a width W of m and a depth ofD- = ) - 0.86m. TV 1 The water channel is divided into an upper layer and a lower layer by a horizontal partition plate
21, and the lower layer of the water channel is divided into 3 regions by vertical partition plates.
The upper layer of the water channel is a sewage collection region 17, and the lower layer of the
water channel is sequentially a physical filtration region 14, a suspended matter treatment region
15 and a heavy metal ion treatment region 16 along a water flow direction.
A starch xanthate adding pipe 31, a PAM and PAC flocculant adding pipe 30 and a pH
regulator adding pipe 36 are arranged in the sewage collection region 17. An outlet of the starch
xanthate adding pipe 31 penetrates through the horizontal partition plate 21 and enters the heavy
metal ion treatment region 16, an outlet of the PAM and PAC flocculant adding pipe 30 penetrates
through the horizontal partition plate 21 and enters the suspended matter treatment region 15, and
an outlet of the pH regulator adding pipe 36 penetrates through the horizontal partition plate 21
and enters the suspended matter treatment region 15. In the physical filtration region 14, 5
filtration metal grids 18 with different aperture sizes are arranged vertically, and the aperture sizes
of the metal grids are sequentially 106 um, 105 um, 104 num, 10 um and 102 um along the water flow direction. Filtered water in the physical filtration region 14 is pumped into the suspended matter treatment region by a water pump 23, and 1 microporous filter membrane 19 with a pore size of 10 um, 1 pH detector 26 and1 turbidity detector 25 are arranged in the suspended matter treatment region 15. The purified water in the suspended matter treatment region 15 is pumped into the heavy metal ion treatment region 16 by a water pump 24, a reverse osmosis membrane 20, a heavy metal ion detector 35 and a heavy metal ion detector 27 are arranged in the heavy metal ion treatment region 16, the 1 heavy metal ion detector 35 is arranged at a water inlet area of the heavy metal ion treatment region 16, and the 1 heavy metal ion detector 27 is arranged at a water outlet area of the heavy metal ion treatment region 16. A production water outlet pipe 28 communicates with a water outlet area of the suspended matter treatment region 15. A domestic water storage pipe 29 communicates with the water outlet area of the heavy metal ion treatment region 16.
A mechanical centrifuge 1, a sludge pump 2, an automatic control console 3 and a water
pump 4 are arranged within a stopping line of the mining roadway. The sludge pump 2 is
connected to a bottom of the heavy metal ion treatment region 16, a bottom of the water inlet area
of the suspended matter treatment region 15 and a bottom of the water outlet area of the suspended
matter treatment region 15 through a silt pumping pipe 32. The sludge pump 2 is connected to the
mechanical centrifuge through a pipeline. Sewage discharged from the mechanical centrifuge 1
enters the sewage collection region 17 through a return pipe 33. The automatic control console 3 is
connected to an electronic control valve 9, an electronic control valve 10, an electronic control
valve 11, an electronic control valve 12, the water pump 4, the water pump 23, the water pump 24,
the heavy metal ion detector 35, the heavy metal ion detector 27, the turbidity detector and the pH
detector through the control lines 34.
If an interval between additions is 1 h, a mass of the PAC flocculant added each time is
mpac =100q 2 t 2 100 x (P+ Y) x l =100 x (0. 2 3+0. 2 0) x 60 x l= 2 580g
A mass of the PAM flocculant added each time is
mpa = 2q 2 t 2 =2 x (P + Y) x 60 x l= 41.6g
A flow rate of water entering the heavy metal ion treatment region can be controlled by the
water pump 24. Assuming that the flow rate of the water entering the heavy metal ion treatment region 16 is 1/4 of the flow rate of water entering the suspended matter treatment region 15, a mass of the starch xanthate added each time is md = 6xtxqlx c, =6xlx-x(.23+0.2)x6Ox(10+12+6+5)=1277.lg
The domestic water delivery pipeline is arranged in the underground roadway, one end is
connected to the water outlet area of the heavy metal ion treatment region 16 of the working face
sewage and goaf accumulated water collection and purification system 5, and the other end is
connected to a domestic water facility. The production water delivery pipeline is arranged in the
underground roadway, one end is connected to the water outlet area of the suspended matter
treatment region 15 of the working face sewage and goaf accumulated water collection and
purification system 5, and the other end is respectively connected to production water places, such
as spray pumps and water tanks of the underground working face, equipment condensation water,
dust prevention water and ground coal washing water.
Claims (8)
1. A fully mechanized mining working face mine water resource utilization system,
comprising a working face sewage and goaf accumulated water collection and purification system
(5), a silt treatment system, a feedback control system, a domestic water delivery pipeline and a
production water delivery pipeline; wherein
the working face sewage and goaf accumulated water collection and purification system (5)
comprises a roadway floor water channel (8), a gangue isolation metal grid (13), a horizontal
partition plate (21), vertical partition plates (23) and filtration metal grids (18), one end of the
roadway floor water channel (8) is located at a stopping line, and the other end is located at an
open-off cut;
the gangue isolation metal grid (13) covers the roadway floor water channel (8);
the horizontal partition plate (21) is horizontally mounted in the roadway floor water channel
(8) to divide the roadway floor water channel (8) into an upper layer and a lower layer, the upper
layer is a sewage collection region (17), the lower layer is a physical filtration region (14), a
suspended matter treatment region (15) and a heavy metal ion treatment region (16), and an
opening is left at an end near the water channel;
the two vertical partition plates (23) divide the lower layer of the roadway floor water
channel (8) into three regions, namely the physical filtration region (14), the suspended matter
treatment region (15) and the heavy metal ion treatment region (16);
the plurality of filtration metal grids (18) with different aperture sizes are vertically arranged
in the physical filtration region (14); a water pump 1 (23) is arranged in the physical filtration
region (14), and the water pump 1 (23) is configured to pump filtered water in the physical
filtration region (14) into the suspended matter treatment region (15);
a microporous filter membrane (19), a pH detector (26) and a turbidity detector (25) are
arranged in the suspended matter treatment region (15), a water pump 11 (24) is arranged in the
suspended matter treatment region (15), and the water pump 11 (24) is configured to pump purified
water into the heavy metal ion treatment region (16);
a reverse osmosis membrane (20), a heavy metal ion detector 1 (35) and a heavy metal ion detector 11 (27) are arranged in the heavy metal ion treatment region (16), the heavy metal ion detector 1 (35) is arranged at a water inlet area of the heavy metal ion treatment region (16), and the heavy metal ion detector 11 (27) is arranged at a water outlet area of the heavy metal ion treatment region (16); a production water outlet pipe (28) communicates with a water outlet area of the suspended matter treatment region (15); a domestic water storage pipe (29) communicates with the water outlet area of the heavy metal ion treatment region (16); the silt treatment system comprises a silt pumping pipe (32), a sludge pump (2) and a mechanical centrifuge (1), one end of the silt pumping pipe (32) is respectively connected to a water inlet area of the suspended matter treatment region (15), the water outlet area of the suspended matter treatment region (15) and the water inlet area of the heavy metal ion treatment region (16) through a divaricated pipeline, and the other end of the silt pumping pipe is connected to the sludge pump (2) arranged within the mining roadway stopping line; the sludge pump (2) is connected to the mechanical centrifuge (1) through a pipeline, and sewage discharged from the mechanical centrifuge (1) enters the sewage collection region (17) through a return pipe (33); the feedback control system comprises an automatic control console (3), control lines (34), electronic control valves and water pumps, the automatic control console (3) is arranged within the roadway stopping line, and the automatic control console (3) is respectively connected to an electronic control valve 1 (9), an electronic control valve 11 (10), an electronic control valve III
(11), an electronic control valve IV (12), a water pump 111 (4), a water pump IV (23), a water
pump V (24), the heavy metal ion detector 1 (35), the heavy metal ion detector 11 (27), the pH
detector (26) and the turbidity detector (25) through the control lines (34); the heavy metal ion
detector 1 (35) is configured to determine an amount of starch xanthate added, the pH detector (26)
and the turbidity detector (25) are configured to determine whether water quality meets the water
standard, and when the water quality in the water outlet area does not meet the standard, the
automatic control console (3) automatically closes the electronic control valve 11 (10), opens the
electronic control valve IV (12) and turns on the water pump 111 (4) such that water in the
suspended matter treatment region (15) returns to the sewage collection region (17); the heavy
metal ion detector 11 (27) is configured to determine whether the water quality meets the water standard, and when the water quality in the water outlet area does not meet the standard, the automatic control console (3) automatically closes the electronic control valve 1 (9), opens the electronic control valve III (11) and turns on the water pump 111 (4) such that water in the heavy metal ion treatment region (16) returns to the sewage collection region (17); the domestic water delivery pipeline is arranged in an underground roadway, one end of the domestic water delivery pipeline is connected to the water outlet area of the heavy metal ion treatment region (16) of the working face sewage and goaf accumulated water collection and purification system (5), and the other end is connected to a domestic water facility; and the production water delivery pipeline is arranged in the underground roadway, one end is connected to the water outlet area of the suspended matter treatment region (15) of the working face sewage and goaf accumulated water collection and purification system (5), and the other end is respectively connected to production water places of the underground working face.
2. The fully mechanized mining working face mine water resource utilization system
according to claim 1, wherein the roadway floor water channel (8) has a width W that is 1/5 of a
width of the roadway, and a depth of D = , wherein P is an amount of sewage W discharged into the water channel within 1 minute in the working face; and Y is an amount of
gushing water within 1 minute in the goaf.
3. The fully mechanized mining working face mine water resource utilization system
according to claim 1, wherein the number of the filtration metal grids (18) is 5, and the aperture
sizes of the 5 filtration metal grids (18) are sequentially 106 um, 105 um, 104 um, 10' um and 102
um along a water flow direction.
4. The fully mechanized mining working face mine water resource utilization system
according to claim 1, wherein a pore size of the microporous filter membrane (19) is 10 um.
5. A use method of a fully mechanized mining working face mine water resource utilization
system, comprising the following steps:
Si: enabling working face sewage and goaf accumulated water to naturally flow into a
roadway floor water channel (8) under the action of gravity, enabling the goaf accumulated water
and the working face sewage to flow into a sewage collection region (17) through a gangue
isolation metal grid (13) and then flow into a physical filtration region (14), and after filtration through physical staged filtration metal grids (18), pumping the filtered water into a suspended matter treatment region (15) through a water pump (23);
S2: after adding a pH regulator into the suspended matter treatment region (15) to regulate a
pH of the water to 6-8, adding PAM and PAC flocculants such that suspended solids react with the
PAM and PAC flocculants to generate precipitates, and after filtering the treated water through a
microporous filter membrane (19), enabling part of the water to enter a production water delivery
pipe (28) and part of the water to be pumped into a heavy metal ion treatment region (16) through
a water pump (24); and
S3: in the heavy metal ion treatment region (16), reacting heavy metal ions in the water with
starch xanthate to generate precipitates, and enabling the treated water to enter a domestic water
storage pipe (29) after passing through a reverse osmosis membrane (20).
6. The method according to claim 5, wherein a sequence of adding the treating agents in the
suspended matter treatment region (15) is:
B1: adding the pH regulator through a pH regulator adding pipe (36) to regulate the pH of the
water to 6-8, and
B2: adding the PAC flocculant through a PAM and PAC flocculant adding pipe (30), and
finally adding the PAM treating agent, wherein the water pump (23) and the water pump (24) are
turned off in the process of adding the PAC and PAM flocculants; wherein
a mass of the PAC flocculant added is Mpac 100q22, and a mass of the PAM flocculant
added is mpa = 2q 2 t 2, wherein mpac is the mass of the PAC flocculant added in g; mpam is
the mass of the PAM flocculant added in g; q2 is a flow rate of water in the suspended matter
treatment region in m 3/h; and t2 is a time interval between two additions of the PAC flocculant in
h.
7. The method according to claim 5, wherein the method of adding the starch xanthate to the
heavy metal ion treatment region (16) comprises:
adding the starch xanthate to the heavy metal ion treatment region (16) through a starch
xanthate adding pipe (31), wherein in the process of adding the starch xanthate, the water pump
(23) and the water pump (24) are turned off, a molecular formula of the starch xanthate added is
crosslinked starch-O-CSS-Mg-SSC-crosslinked starch, a sulfur content of the starch xanthate is
8.14%, and a mass of the starch xanthate added is =6 xtx x c, ,,qwherein md represents the
mass of the starch xanthate added in g; t represents a time interval between additions of the starch
xanthate in h; q represents a flow rate of the water in the heavy metal ion treatment region in m3 /h;
i represents the i-th type of heavy metal ions; and ci represents a concentration of the i-th type of
heavy metal ions in g/m.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910103645.0 | 2019-02-01 | ||
| CN201910103645.0A CN109761395B (en) | 2019-02-01 | 2019-02-01 | Fully-mechanized mining face mine water resource utilization system and use method thereof |
| PCT/CN2019/091822 WO2020155524A1 (en) | 2019-02-01 | 2019-06-19 | Fully-mechanized coal-mining face mine shaft water resource utilization system and method for using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2019425968A1 true AU2019425968A1 (en) | 2021-08-26 |
| AU2019425968B2 AU2019425968B2 (en) | 2022-05-12 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2019425968A Ceased AU2019425968B2 (en) | 2019-02-01 | 2019-06-19 | Fully mechanized mining working face mine water resource utilization system and use method thereof |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN109761395B (en) |
| AU (1) | AU2019425968B2 (en) |
| WO (1) | WO2020155524A1 (en) |
| ZA (1) | ZA202105490B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109761395B (en) * | 2019-02-01 | 2020-06-12 | 中国矿业大学 | Fully-mechanized mining face mine water resource utilization system and use method thereof |
| CN111237014B (en) * | 2019-10-29 | 2021-08-03 | 北京天地玛珂电液控制系统有限公司 | Aqueous medium guarantee system for coal face |
| CN111577382A (en) * | 2020-04-14 | 2020-08-25 | 河北昕佳工程勘查设计有限公司 | Water damage prevention and comprehensive water resource utilization method for karst big water iron mine in Hebei Handan chen region |
| CN111362469B (en) * | 2020-04-15 | 2022-04-15 | 郑州大学 | Mining water purification treatment system |
| CN112827649B (en) * | 2021-02-09 | 2023-06-02 | 湖北中烟工业有限责任公司 | Device and method for removing metal foreign matters in solid-liquid mixture through circulating precipitation |
| CN113336346A (en) * | 2021-05-24 | 2021-09-03 | 国电建投内蒙古能源有限公司 | Communication roadway type underground transfer sewage treatment system and construction method thereof |
| CN114644423A (en) * | 2021-12-29 | 2022-06-21 | 北京耐特尔环境工程技术有限公司 | Magnetic core flocculation treatment process for tailing wastewater |
| CN114486666B (en) * | 2022-03-31 | 2022-06-24 | 山东省煤田地质局第五勘探队 | Mine underwater suspended matter analysis and detection device |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070045189A1 (en) * | 2005-08-31 | 2007-03-01 | General Electric Company | Acid mine water demineralization methods |
| CN100439266C (en) * | 2006-08-04 | 2008-12-03 | 中国科学院地理科学与资源研究所 | Technique for treating mine water utilizing mine underground tunnel space |
| CN101177324B (en) * | 2006-11-10 | 2010-11-10 | 中国矿业大学(北京) | Mine water down-hole treatment system |
| WO2013029053A1 (en) * | 2011-08-25 | 2013-02-28 | B9 Plasma, Inc. | System and method for processing aqueous solutions |
| CN102336484A (en) * | 2011-08-25 | 2012-02-01 | 煤炭科学研究总院杭州环保研究院 | Coal mine water underground purification treatment device and method |
| CN102491564B (en) * | 2011-12-23 | 2014-01-15 | 中国矿业大学(北京) | Comprehensive recycling technology for mine water with high suspended matter content and high mineralization degree |
| CN104628094A (en) * | 2013-11-06 | 2015-05-20 | 杜栋 | Preparation technology of starch xanthate |
| CN203890158U (en) * | 2014-05-16 | 2014-10-22 | 山西清泽环境科技有限公司 | Mining sewage filtration treatment and reuse device |
| JP6296296B2 (en) * | 2014-08-26 | 2018-03-20 | 清水建設株式会社 | Water treatment method |
| CA2871177C (en) * | 2014-11-14 | 2017-08-22 | Imperial Oil Resources Limited | Method for treating mine waste |
| CN106673250A (en) * | 2015-11-06 | 2017-05-17 | 哈尔滨市永恒鑫科技开发有限公司 | Waste sewage treatment method in mineral exploration process |
| CN105565542A (en) * | 2015-12-21 | 2016-05-11 | 云南润玖环境工程有限公司 | Mine inflow processing system and application method thereof |
| CN207581515U (en) * | 2017-10-13 | 2018-07-06 | 山东多维能源科技股份有限公司 | A kind of underground coal mine water resources comprehensive utilization device |
| CN109761395B (en) * | 2019-02-01 | 2020-06-12 | 中国矿业大学 | Fully-mechanized mining face mine water resource utilization system and use method thereof |
-
2019
- 2019-02-01 CN CN201910103645.0A patent/CN109761395B/en active Active
- 2019-06-19 AU AU2019425968A patent/AU2019425968B2/en not_active Ceased
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| CN109761395B (en) | 2020-06-12 |
| AU2019425968B2 (en) | 2022-05-12 |
| WO2020155524A1 (en) | 2020-08-06 |
| ZA202105490B (en) | 2022-11-30 |
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