CN102502933A - High-turbidity mine water coagulating sedimentation treatment system - Google Patents
High-turbidity mine water coagulating sedimentation treatment system Download PDFInfo
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Abstract
The invention discloses a high-turbidity mine water coagulating sedimentation treatment system which is formed by sequentially communicating a quick mixing region, a laminar flow sedimentation region, a slow mixing region, a reaction region and a sloping plate sedimentation region, wherein the quick mixing region is provided with a flocculant PAM (polyacrylamide) configuration system which is composed of a PAM storage tank, a PAM dissolving tank, a PAM liquid storage tank and a PAM metering pump; the slow mixing region is provided with a flocculant PAC (polyaluminium chloride) configuration system which is composed of a PAC storage tank, a PAC dissolving tank, a PAC liquid storage tank and a PAC metering pump; the sloping plate sedimentation region adopts a maze sloping plate sedimentation tank; and the sloping plate is made of nontoxic polyvinyl chloride and provided with fins. The multistage slowing stirring system is designed to enhance the removal effect of stable suspended substances in the later period. The high-turbidity mine water coagulating sedimentation treatment system is provided with the five regions, thereby enhancing the coagulating treatment effect and implementing economical and efficient treatment and reutilization of high-turbidity mine water.
Description
Technical field
The present invention relates to the pit water treatment technology, relate in particular to a kind of high turbid pit water coagulating sedimentation treatment system.
Background technology
In coal pit mining process, in order to ensure downhole safety production, must discharge a large amount of pit waters, the direct discharging severe contamination of pit water local surface water, cause the waste of surface water, groundwater resource.Pit water is a kind of pollutent with industry characteristic, also is a kind of precious water resource.As do not handle, not only waste great lot of water resources, and caused environmental pollution.
Most of pit water contains the suspended substance and the ferrimanganic pollutent of high density.
In the prior art, the pit water treatment project generally adopts coagulation-settlement process to remove the suspended substance of high density, reaches the effect of removing ferrimanganic simultaneously.Yet the coagulating sedimentation unit is mainly according to surface water, the relevant parameter designing of underground water.Because underground water/surface water turbidity is generally less than 100NTU, mainly is silt, than free settling; And coal mine water belongs to high muddy water; Concentration of suspension is high and unstable (general 10-1000mg/L can reach mg/L up to ten thousand when shaft sump is brought down stocks), and staple is a coal dust; Suspended substance in the pit water mainly is made up of light-weight coal dust, rock dust and partial organic substances, its light specific gravity, free settling not.Suspended substance exists remarkable difference in water chemistry character and sedimentation behavior and the underground water/surface water; Therefore be foundation with underground water/surface water quality; Adopt the coagulating sedimentation system of the G value design of recommending in the prior art; Not only can't obtain satisfied treatment effect, usually cause effluent quality variation after coagulation-settlement process operation for some time, also can cause the inclined-plate clarifying basin avalanche sometimes because handling load too high (when especially pit water is brought down stocks).
The deposition of suspended substance motion in the water is that The apparent phenomenon is different according to the size and the deposition of concentration of suspension, can be divided into freely precipitate, keeping within bounds deposition and extrude and precipitate.Suspended substance deposition mainly is precipitated as the master to keep within bounds in the high muddy water, and mud granule is no longer according to the size of particle diameter separately, freely descends according to separately heavy speed, but the sand grains of individual various different sizes is with colony's decline of identical heavy fast composition.The suspended substance that contains among the ultra is more, because suspended substance occupies volume, when suspended substance sinks; Must press to the top with the water of volume; This has just formed an ascending current, produces the lift velocity of water, and those heavy speed are less than the suspended substance of current lift velocity; Be prone to controlled, be difficult for removing by ascending current.Because the suspended substance PRECIPITATION MECHANISM is different in the high turbidity pit water, in the prior art with compression double electric layer, absorption take off steady, volume is swept etc. serve as the flocculation agents such as molysite, aluminium salt or inorganic polymer of main effect, Chang Buneng obtains the result of satisfaction in high muddy water is handled.
Summary of the invention
The purpose of this invention is to provide a kind of high turbid pit water coagulating sedimentation treatment system, can carry out the processing of economical and efficient the turbid pit water of height.
The objective of the invention is to realize through following technical scheme:
The turbid pit water coagulating sedimentation of height of the present invention treatment system; This system comprises successively the short mix district that connects, advection sedimentation district, mixing zone, reaction zone, sloping plate deposition district at a slow speed; The import in said short mix district is the water-in of system; The outlet in said sloping plate deposition district is the water outlet of system, and said short mix district is provided with flocculation agent PAM configuration-system, and said mixing zone at a slow speed is provided with flocculation agent PAC configuration-system.
Technical scheme by the invention described above provides can be found out; The turbid pit water coagulating sedimentation of height provided by the invention treatment system; Owing to comprise successively the short mix district that connects, advection sedimentation district, mixing zone, reaction zone, sloping plate deposition district at a slow speed; The short mix district is provided with flocculation agent PAM configuration-system, and the mixing zone is provided with flocculation agent PAC configuration-system at a slow speed.Can pass through short mix district and advection settling region, remove unstable particle in the high muddy water earlier, can reduce the subsequent disposal load like this, avoid inclined-plate clarifying basin avalanche because of overload; Organic polymer coargulator PAM can obtain good effect in high muddy water is handled; What adopt behind the short mix district is the advection sedimentation district, so swash plate avalanche phenomenon can not take place as traditional technology selecting and purchasing inclined-plate clarifying basin; Through the horizontal sedimentation tank post precipitation, the concentration of suspension in the pit water is less, and no longer be to belong to high turbidity pit water this moment; Its PRECIPITATION MECHANISM is more similar with surface water; Can adopt inorganic polymer flocculant PAC to carry out flocculation sediment this moment, because the grain amount sum is less, particle is less; Adopt inclined-plate clarifying basin can improve the suspended substance removal effect this moment, obtains precipitated outlet water water quality preferably.
Description of drawings
The structural representation of the high turbid pit water coagulating sedimentation treatment system that Fig. 1 provides for the embodiment of the invention;
Each label is among the figure: 1-short mix district; 2-advection sedimentation district; 3-is the mixing zone at a slow speed; The 4-reaction zone; 5-sloping plate deposition district; The 6-water inlet; The 7-water outlet; The 8-PAM volume pump; The 9-PAM reservoir; The 10-PAM lixator; The 11-PAM storage tank; The 12-PAC volume pump; The 13-PAC reservoir; The 14-PAC lixator; The 15-PAC storage tank; The 16-stirring rake; 17-labyrinth inclined-plate clarifying basin; The 18-sludge bucket; 19-PAM adds mouth; 20-PAC adds mouth.
Embodiment
To combine accompanying drawing that the embodiment of the invention is done to describe in detail further below.
The turbid pit water coagulating sedimentation of height of the present invention treatment system; This system comprises successively the short mix district that connects, advection sedimentation district, mixing zone, reaction zone, sloping plate deposition district at a slow speed; The import in said short mix district is the water-in of system; The outlet in said sloping plate deposition district is the water outlet of system, and said short mix district is provided with flocculation agent PAM configuration-system, and said mixing zone at a slow speed is provided with flocculation agent PAC configuration-system.
Said flocculation agent PAM configuration-system comprises PAM storage tank, PAM lixator, PAM reservoir and the PAM volume pump that connects successively, and said PAM metering pump outlet is connected with said short mix district, and the dosage of said flocculation agent PAM is 5mg/L～20mg/L.
Said flocculation agent PAC configuration-system comprises PAC storage tank, PAC lixator, PAC reservoir and the PAC volume pump that connects successively, and said APC metering pump outlet is connected with said mixing zone at a slow speed, and the dosage of said flocculation agent PAC is 50mg/L～200mg/L.
Said short mix district hydraulic detention time is 1min～5min, is provided with stirring rake in this district, and the blade lower edge of stirring arm is 1/4th of this district's depth of water from the height of this bottom surface, district, and the G value regulation range of stirring is 300～500S
-1
Said advection sedimentation district hydraulic detention time is 5min～15min, and this bottom, district is provided with sludge bucket, and the outlet conduit of said sludge bucket is connected with said mixing zone at a slow speed, and the mud delivery ratio is 1～6.
Said mixing zone at a slow speed hydraulic detention time is 5min～20min, is provided with stirring rake in this district, and the blade lower edge of stirring arm is 1/5th of this district's depth of water from the height of this bottom surface, district, and the G value regulation range of stirring is 100～300S
-1
Said reaction zone hydraulic detention time is 20min～30min, is provided with stirring rake in this district, and the blade lower edge of stirring arm is 1/3rd of this district's depth of water from the height of this bottom surface, district, and the G value regulation range of stirring is 30～100S
-1
Said sloping plate deposition district adopts the labyrinth inclined-plate clarifying basin, and swash plate adopts the non-toxic polyvinyl chloride material to process, and swash plate is provided with fin.
Specific embodiment:
The high turbid pit water coagulating sedimentation treatment system of present embodiment; Can carry out rational and effective to the turbid pit water of height handles; Can make water outlet reach the reuse water standard after the processing, this system is by short mix district, advection sedimentation district, mixing zone, reaction zone, sloping plate deposition district are connected in sequence at a slow speed.The water-in in short mix district is as the water-in of system, and the water outlet in sloping plate deposition district is as the water outlet of system.
Wherein, The top in short mix district is provided with flocculation agent PAM (SEPIGEL 305) configuration-system; Be made up of PAM storage tank, PAM lixator, PAM reservoir and PAM volume pump, adopt volume pump that the PAM solution in the reservoir is added in the rapidly miscible pool, dosage is 5mg/L～20mg/L.At first flocculation agent PAM dissolves in the PAM storage tank, flows into the PAM lixator afterwards and is made into finite concentration, is stored in the PAM reservoir with subsequent use; The bottom in short mix district is provided with stirring rake, the height of blade lower edge at the bottom of the pond be pool inner water dark 1/4th, the G value regulation range of stirring is 300～500S
-1, hydraulic detention time is 1min～5min, helps the formation of flco.Flocculation agent PAM in the PAM reservoir is through adding a mouthful input; Volume pump control dosage; And by stirring arm; Realize the high turbid pit water thorough mixing of flocculation agent PAM and inflow, make it can better adsorb suspended substances such as ground particle in the former water of high turbid pit water, coal dust, form more flco.
Advection sedimentation district hydraulic detention time is 5min～15min, and the bottom is provided with sludge bucket, through pipeline the mud in the sludge bucket is delivered to mixing zone at a slow speed, and the mud delivery ratio is 1～6.Through short mix district and advection settling region are set, remove unstable particle in the high muddy water earlier, can reduce the subsequent disposal load like this, avoid inclined-plate clarifying basin avalanche because of overload.This part particle is removed than being prone to simultaneously, can reduce the flocculant dosage and minimizing inclined-plate clarifying basin volume of subsequent disposal simultaneously, reduces processing costs.
The top of mixing zone is provided with flocculation agent PAC (Poly aluminum Chloride (PAC)) configuration-system at a slow speed; Form by PAC storage tank, PAC lixator, PAC reservoir and PAC volume pump; Adopt volume pump that the PAC solution in the reservoir is added at a slow speed in the mixing pit, dosage is 50mg/L～200mg/L.At first flocculation agent PAC dissolves in the PAC storage tank, flows into the PAC lixator afterwards and is mixed with finite concentration, is stored in the PAC reservoir with subsequent use; The bottom of mixing zone is provided with stirring rake at a slow speed, the height of blade lower edge at the bottom of the pond be pool inner water dark 1/5th, the G value regulation range of stirring is 100～300S
-1, hydraulic detention time is 5min～20min, helps the stable suspersion particle in the flocculation agent PAC absorption pit water.Flocculation agent PAC in the PAC reservoir is through adding a mouthful input, and volume pump is controlled dosage, and by stirring arm, realizes flocculation agent PAC and the thorough mixing that flows into pit water.
The reaction zone hydraulic detention time is 20min～30min, is provided with stirring rake, the height of blade lower edge at the bottom of the pond be pool inner water dark 1/3rd, the G value regulation range of stirring is 30～100S
-1, compare at a slow speed that the G value of mixing zone reduces, the removal of suspended substance in the carrying out that helps coagulating and the pit water.
The sloping plate deposition district adopts the labyrinth inclined-plate clarifying basin, the swash plate that swash plate adopts the non-toxic polyvinyl chloride material to process, and swash plate is provided with fin, through design multi-stage speed-reducing stirring system, improves the removal effect of stable suspersion thing; The waste particles amount sum that flow into this moment is less, and particle is less, adopts inclined-plate clarifying basin can effectively remove the suspended substance in the pit water, obtains precipitated outlet water water quality preferably.
Below in conjunction with Fig. 1 the foregoing description is further specified.
As shown in Figure 1, the turbid pit water coagulating sedimentation of this high treatment system is by short mix district 1, advection sedimentation district 2, mixing zone 3, reaction zone 4, sloping plate deposition district 5 constitute at a slow speed.
The former water of high turbid pit water is through the short mix district 1 of the high turbid pit water coagulating sedimentation treatment system of too high turbid pit water coagulating sedimentation treatment system water-in 6 inflows, and this short mix district 1 can save dosage, can obtain good flocculating effect again.The top in short mix district 1 is provided with flocculation agent PAM configuration-system, and at first flocculation agent PAM dissolves in PAM storage tank 11, flows into PAM lixator 10 afterwards and is made into finite concentration, is stored in 9 li of PAM reservoirs with subsequent use; The bottom in short mix district 1 is provided with stirring rake, the height of blade lower edge at the bottom of the pond be pool inner water dark 1/4th, the G value regulation range of stirring is 300～500S
-1, help the formation of flco.The flocculation agent PAM that the PAM reservoir is 9 li is through adding mouthful 19 inputs; Volume pump 8 control dosages; And by stirring arm 16; Realize the high turbid pit water thorough mixing of flocculation agent PAM and inflow, make it can better adsorb suspended substances such as ground particle in the former water of high turbid pit water, coal dust, form more flco.
The current that short mix district 1 has a more flco are crossed dividing plate and are flowed into advection sedimentation district 2 from the top, and this bottom, advection sedimentation district is provided with sludge bucket 18, does not establish stirring rake, through pipeline the mud in the sludge bucket 18 is delivered to mixing zone at a slow speed.So not only help current and be evenly distributed in the whole advection sedimentation district 2, and compare short mix district 1 and reduced disturbance, protect the alumen ustum that forms, help the deposition of flco.The advection sedimentation district 2 that the short mix district adopts 1 back; Not only effectively remove unstable particle in the high muddy water; Can reduce the subsequent disposal load again; Swash plate avalanche phenomenon can not take place as traditional technology selecting and purchasing inclined-plate clarifying basin, reduce the flocculant dosage and minimizing inclined-plate clarifying basin volume of subsequent disposal, and then reduce processing costs.
The current in advection sedimentation district 2 are crossed dividing plate and are flowed into mixing zone 3 at a slow speed from the top; This not only can reach dynamical stirring action in mixing zone 3 at a slow speed; Accelerate the velocity of diffusion of flocculation agent PAC, waste water and flocculation agent PAC are mixed fully, can remove the main suspended substance in the waste water again effectively.The top of mixing zone 3 is provided with flocculation agent PAC configuration-system at a slow speed, and at first flocculation agent PAC dissolves in PAC storage tank 15, flows into PAC lixator 14 afterwards and is mixed with finite concentration, is stored in 13 li of PAC reservoirs with subsequent use; The bottom is provided with stirring rake, the height of blade lower edge at the bottom of the pond be pool inner water dark 1/5th, the G value regulation range of stirring is 100～300S
-1, help the stable suspersion particle in the flocculation agent PAC absorption pit water.The flocculation agent PAC that the PAC reservoir is 13 li is through adding mouthful 20 inputs, and volume pump 12 is controlled dosages, and by stirring arm 16, realizes flocculation agent PAC and the thorough mixing that flows into pit water.
The current of mixing zone 3 are crossed dividing plate and are flowed into reaction zone 4 from the top at a slow speed, and this reaction zone 4 is provided with stirring rake, the height of blade lower edge at the bottom of the pond be pool inner water dark 1/3rd, the G value regulation range of stirring is 30～100S
-1, compare at a slow speed that the G value of mixing zone 3 reduces, the removal of suspended substance in the carrying out that helps coagulating and the pit water.
Current in the reaction zone 4 flow into sloping plate deposition district 5 from the bottom; These sloping plate deposition district 5 employing labyrinth inclined-plate clarifying basins, the swash plate that swash plate adopts the non-toxic polyvinyl chloride material to process, swash plate is provided with fin; Current are eddy current state, circulation state when getting into tab area; Have enough velocity slopes between a fluid stream, have collision opportunity fully between the particle, thereby have good throwing out.Through design multi-stage speed-reducing stirring system, improve the removal effect of stable suspersion thing; The waste particles amount sum that flow into this moment is less, and particle is less, adopts inclined-plate clarifying basin can improve the removal effect of suspended substance in the pit water, obtains precipitated outlet water water quality preferably.
In the above-mentioned treatment system, the short mix district 1 of coagulating sedimentation system, advection sedimentation district 2, mixing zone 3, reaction zone 4,5 bottoms, sloping plate deposition district are equipped with sludge bucket 18 at a slow speed; Short mix district 1, mixing zone 3, reaction zone 4 are equipped with stirring rake at a slow speed; And the G value regulation range that stirs reduces successively; Both help forming big flco, and can protect the flco of having grown up again, can better remove the suspended substance in the high turbid pit water like this.
Mine water treatment system in the embodiment of the invention is particularly useful for high turbidity pit water to be handled, and compares that prior art has the following advantages and positive effect:
(1) through short mix district and advection settling region are set; Remove unstable particle in the high muddy water earlier; Can reduce the subsequent disposal load like this; Avoid inclined-plate clarifying basin avalanche, can reduce the flocculant dosage and minimizing inclined-plate clarifying basin volume of subsequent disposal simultaneously, reduce processing costs because of overload.
(2) different to the degree of treatment of high turbid pit water, be connected with two kinds different flocculation agent configuration-system in the short mix district of technology with mixing zone at a slow speed, make flocculation agent obtain more abundant reasonable use.Pit water in the short mix district mainly contains high and unsettled concentration of suspension mainly is made up of light-weight coal dust, rock dust and partial organic substances, its light specific gravity, free settling not.The inventor is through discovering that organic polymer coargulator PAM can obtain good effect.In addition, because the relatively stable particle amount of unstable particle this moment is bigger, so flocculant dosage is less; Waste water in the mixing zone is through the horizontal sedimentation tank post precipitation at a slow speed; Concentration of suspension in the pit water is less; No longer be to belong to high turbidity pit water this moment, and its PRECIPITATION MECHANISM is more similar with surface water, and the traditional inorganic polymer flocculant PAC of this appropriate to the occasion employing carries out flocculation sediment; Because this moment, stable particle was more relatively, so flocculant dosage is bigger.
(3) the short mix district, mixing zone, reaction zone are equipped with stirring rake at a slow speed, and the G value regulation range that stirs reduces successively, can better remove the stable suspersion thing like this; Because in flocculation process, exist flocculation and broken two mechanism simultaneously, the size of flco has certain limit, and with velocity slope inverse relation is arranged; In step of reaction; Main lean on machinery or waterpower to stir to impel the particle collision cohesion, after bigger flco forms, if still keep bigger velocity slope this moment; The easy fragmentation of big flocs unit causes the process result degrades of coagulating sedimentation, so the G value should reduce gradually in the reaction process.
(4) the sloping plate deposition district adopts the labyrinth inclined-plate clarifying basin; The swash plate that swash plate adopts the non-toxic polyvinyl chloride material to process; Swash plate is provided with fin; Floss was well precipitated, can make the material of in reaction zone, failing to generate good floss continue flocculation again, generation can be sunk flight of steps leading to a palace hall floss; Through design multi-stage speed-reducing stirring system, improve the removal effect of stable suspersion thing; The waste particles amount sum that flow into this moment is less, and particle is less, adopts inclined-plate clarifying basin better to remove suspended substance, obtains precipitated outlet water water quality preferably.
The water treatment system that the embodiment of the invention provides undergoes technological transformation to the turbid pit water of height; Characteristics according to the turbid pit water of height; In conjunction with coagulation-settlement process; Further process for refining is selected suitable flocculation agent and G value reasonable in design to the degree of treatment of the high turbid pit water of different steps, and the turbid mine water treatment system of height is had important environmental value and remarkable economical, social benefit.The water quality that native system is handled the back water outlet can satisfy the requirement of water of productive use such as fully-mechanized mining equipment emulsion preparation water, downhole electrical motor cooling, the dustproof watering in down-hole and equipment washing and even domestic water.Realize the reuse of high turbid pit water, alleviated the pressure of mining area water.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (8)
1. one kind high turbid pit water coagulating sedimentation treatment system; It is characterized in that; This system comprises successively the short mix district that connects, advection sedimentation district, mixing zone, reaction zone, sloping plate deposition district at a slow speed, and the import in said short mix district is the water-in of system, and the outlet in said sloping plate deposition district is the water outlet of system; Said short mix district is provided with flocculation agent PAM configuration-system, and said mixing zone at a slow speed is provided with flocculation agent PAC configuration-system.
2. the turbid pit water coagulating sedimentation of height according to claim 1 treatment system; It is characterized in that; Said flocculation agent PAM configuration-system comprises PAM storage tank, PAM lixator, PAM reservoir and the PAM volume pump that connects successively; Said PAM metering pump outlet is connected with said short mix district, and the dosage of said flocculation agent PAM is 5mg/L～20mg/L.
3. the turbid pit water coagulating sedimentation of height according to claim 1 treatment system; It is characterized in that; Said flocculation agent PAC configuration-system comprises PAC storage tank, PAC lixator, PAC reservoir and the PAC volume pump that connects successively; Said APC metering pump outlet is connected with said mixing zone at a slow speed, and the dosage of said flocculation agent PAC is 50mg/L～200mg/L.
4. the turbid pit water coagulating sedimentation of height according to claim 1 treatment system; It is characterized in that; Said short mix district hydraulic detention time is 1min～5min; Be provided with stirring rake in this district, the blade lower edge of stirring arm is 1/4th of this district's depth of water from the height of this bottom surface, district, and the G value regulation range of stirring is 300～500S
-1
5. the turbid pit water coagulating sedimentation of height according to claim 1 treatment system; It is characterized in that said advection sedimentation district hydraulic detention time is 5min～15min, this bottom, district is provided with sludge bucket; The outlet conduit of said sludge bucket is connected with said mixing zone at a slow speed, and the mud delivery ratio is 1～6.
6. the turbid pit water coagulating sedimentation of height according to claim 1 treatment system; It is characterized in that; Said mixing zone at a slow speed hydraulic detention time is 5min～20min; Be provided with stirring rake in this district, the blade lower edge of stirring arm is 1/5th of this district's depth of water from the height of this bottom surface, district, and the G value regulation range of stirring is 100～300S
-1
7. the turbid pit water coagulating sedimentation of height according to claim 1 treatment system; It is characterized in that; Said reaction zone hydraulic detention time is 20min～30min; Be provided with stirring rake in this district, the blade lower edge of stirring arm is 1/3rd of this district's depth of water from the height of this bottom surface, district, and the G value regulation range of stirring is 30～100S
-1
8. the turbid pit water coagulating sedimentation of height according to claim 1 treatment system is characterized in that, said sloping plate deposition district adopts the labyrinth inclined-plate clarifying basin, and swash plate adopts the non-toxic polyvinyl chloride material to process, and swash plate is provided with fin.
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| CN112028194B (en) * | 2020-07-30 | 2022-11-25 | 中煤科工集团西安研究院有限公司 | Mine water flash mixing low-speed multi-stage dosing method and device |
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Application publication date: 20120620 |