CN108975474A - Shield muddy water solid-liquid quick separating modified inorganic flocculant and method of modifying and application - Google Patents
Shield muddy water solid-liquid quick separating modified inorganic flocculant and method of modifying and application Download PDFInfo
- Publication number
- CN108975474A CN108975474A CN201811113396.5A CN201811113396A CN108975474A CN 108975474 A CN108975474 A CN 108975474A CN 201811113396 A CN201811113396 A CN 201811113396A CN 108975474 A CN108975474 A CN 108975474A
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- Prior art keywords
- muddy water
- shield
- modified inorganic
- inorganic flocculant
- quick separating
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Classifications
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- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
Abstract
The invention discloses a kind of shield muddy water solid-liquid quick separating modified inorganic flocculant and method of modifying and applications.The modified inorganic flocculant is made of inorganic flocculating agent and modifying agent.The preparation method for modifier includes iron content, the preparation of zinc feed liquid, and modifying agent is prepared and prepared to siliceous feed liquid.Its application is that the modified inorganic flocculant is applied in shield muddy water, shield machine it is near coal-mine to shield muddy water carry out the filtering of solid-liquid quick separating to get to moisture content lower than 30% clod and the industrial water that reaches the world two classes above standard.Muddy water can be achieved in the near coal-mine quick separating of shield in the present invention, reduce transportational process pollution problem caused by shield muddy water conventional processing technique, there is no organic principle in modified inorganic flocculant, alleviates mud, water to the potential hazard of environment, reduce shield mud cost of disposal.Operation of the present invention simply, conveniently, can fast implement shield mud-water separation, and will not bring organic matter into mud and water and cause secondary pollution.
Description
Technical field
The present invention relates to shield dregs processing technology fields, particularly refer to the modified nothing of shield muddy water solid-liquid quick separating
Machine flocculant and method of modifying and application.Belong to solid-liquid rapid separation field.
Background technique
In the construction such as city tunnel, subway and high-speed rail, slurry shield construction technology can be used mostly.In order to make to enter
In shield storehouse dregs have preferable mobility convenient for transmission, reduce Shield-type machinery abrasion, improve shield machine boring parameter and
It improves shield machine and tunnels quality, it will usually certain water, foaming agent or high molecular polymer are injected into storehouse, to generate a large amount of
Shield muddy water containing foaming agent and high molecular polymer.The domestic disposal options for shield muddy water are directly to transport outward mostly at present
Carry out simple coarse granule screening process to dregs storage field, main problem existing for which has: (1) due in shield mud water contain
Amount is usually above 80%, it is easy to which the race in transportational process emits drip, pollution environment；(2) because in mud moisture content it is excessively high, cause to transport
Defeated cost is high；(3) special storage field is needed to dispose muddy water, so that disposal costs increase；(4) existing in storage field
Disposition be mostly that coarse granule simply sieves because the separation of waste mud natural subsidence is difficult, it will usually be charged with polyacrylamide
Amine high polymer coagulant realizes the sedimentation of mud and the separation of water, the direct waste emission of the mud of isolated water and sedimentation, both
Waste water resource, and mud emission become soft base mostly recycle difficulty to increase so that stacking ground.Therefore, if energy
A new technology is developed, mud-water separation can be directly realized by the near coal-mine of construction, and no longer bring organic matter into, it would be beneficial to Yu Shuizi
Source recycles, and can also remove storage field, also help the recycling of transport and mud.The key of new technology is exactly to find one
It can be in the near coal-mine additive for fast implementing mud-water separation.Up to the present, it yet there are no achievable muddy water near coal-mine quick separating skill
The report of art.Summary of the invention
It is an object of the invention to overcome the deficiency of the prior art, provides a kind of shield of achievable shield muddy water quick separating
Structure muddy water solid-liquid quick separating modified inorganic flocculant and method of modifying and application.The present invention can not only realize in shield muddy water
With the resource utilization of mud in water resource, the difficult field for realizing muddy water quick separating such as sludge is applied also for.
A kind of shield muddy water solid-liquid quick separating modified inorganic flocculant of the present invention, the modified inorganic flocculant is by nothing
Machine flocculant and modifying agent form, 50-100g containing inorganic flocculating agent in every liter of modifying agent.
A kind of shield muddy water solid-liquid quick separating modified inorganic flocculant of the present invention, the inorganic flocculating agent are selected from polymerization
Ferrosilite, polymeric aluminium ferrum silicate, polymer phosphate ferro-aluminum, poly aluminium sulfate silicate, polymeric aluminum sulfate iron, one in polymer aluminium silicate
Kind.
A kind of shield muddy water solid-liquid quick separating modified inorganic flocculant of the present invention, the modifying agent are matched as follows
System:
Step 1: iron content, zinc feed liquid are prepared
Reaction is mixed at least after sixty minutes in solution of zinc sulfate, sulfuric acid, iron filings, hydrogen peroxide, filtering is added, filtrate is
Iron content, zinc feed liquid；
Step 2: siliceous feed liquid is prepared
The waterglass weak solution of silica quality percentage concentration≤0.025% is prepared, agitation and dropping sulfuric acid tune pH value is extremely
1.5-2.5 obtains siliceous feed liquid；
Step 3: preparing modifying agent
Iron content, the zinc feed liquid for taking the first step to obtain are mixed with the siliceous feed liquid that second step obtains, and obtain modifying agent；
In the first step, zinc ion concentration is 50-500mg/L in solution of zinc sulfate, and sulfuric acid mass percentage concentration is greater than 98%；
By 10-20g iron filings are added in every liter of solution of zinc sulfate, 10-20mL sulfuric acid is mixed, and is stirred at 30-40 DEG C anti-
After answering 60-90min, hydrogen peroxide is added into mixed liquor, the additional amount of hydrogen peroxide is added 1-2g by every liter of mixed liquor, filters to contain
Iron, zinc feed liquid；
In second step, waterglass weak solution concentration is 0.02-0.025%, agitation and dropping sulfuric acid tune pH value to 1.5-2.5
Afterwards, continue after stirring 90-120min, stand 2h or more, obtain siliceous feed liquid；
In third step, by 150-200mL iron content, zinc feed liquid is incorporated in every liter of siliceous feed liquid, modifying agent is obtained.
A kind of method of modifying of shield muddy water solid-liquid quick separating modified inorganic flocculant of the present invention, is by every liter of modification
It is incorporated 50-100g inorganic flocculating agent in agent and is uniformly mixed.
A kind of application of shield muddy water solid-liquid quick separating modified inorganic flocculant of the present invention, is by the modified inorganic
Flocculant is applied in shield muddy water, near coal-mine to shield muddy water progress solid-liquid quick separating in shield machine.
A kind of application of shield muddy water solid-liquid quick separating modified inorganic flocculant of the present invention, will separate bulky grain
After the solid-to-liquid ratio of the shield muddy water of gravel is adjusted to 1:3~1:5, modified inorganic flocculant, pH adjusting agent, drainage are sequentially added
Agent is filtered immediately after stirring.
A kind of application of shield muddy water solid-liquid quick separating modified inorganic flocculant of the present invention, the modified inorganic flocculation
The additional amount of agent is that 5-10mL is added in every liter of shield muddy water；
The pH adjusting agent refers to that one kind, additional amount are reached in sodium carbonate or calcium carbonate with shield muddy water pH value
9~10 meterings；
The filter aid is any one of diatomite or perlite, and 0.5-1g is added in every liter of mud to be processed.
A kind of application of shield muddy water solid-liquid quick separating modified inorganic flocculant of the present invention, modified inorganic flocculant stir
It is not necessarily to stop after mixing addition, pH adjusting agent is first directly just added, is filtered immediately after filter aid and then is added.
A kind of application of shield muddy water solid-liquid quick separating modified inorganic flocculant of the present invention, the filtering refer to
Any one in the traditional technologies such as sheet frame or centrifugal filtration.
Why the developed modified inorganic flocculant of the present invention has the excellent mud-water separation that rapidly promotes, and separation institute
It obtains clear water and reaches the above standards for industrial water usage of national two classes, be mainly that modified inorganic flocculant includes modifying agent and inorganic flocculation
Agent finally realizes the purpose of quick separating muddy water of the present invention in addition, the collaboration of pH adjusting agent and filter aid uses.
(1) contain certain density acid in modifying agent, and usually inevitably there is ferriferous oxide in shield muddy water, when
When modified inorganic flocculant is mixed with mud, it can make to exist simultaneously Fe (OH) in mud2+、Zn(OH)+、Fe3+With Zn2+Etc. components,
These components can generate the wadding body sediment Fe largely acted on organic matter strong adsorption in mud in shield muddy water environment
(OH)3、Zn(OH)2, these lay a good foundation for the reduction of the clear Organic substance in water of gained after shield mud-water separation；Make muddy water pH value
Reach the addition of 9 or more pH adjusting agent, the heavy metal ion in muddy water can be made all to enter solid phase with precipitation form, in this way
Having taken care of yourself there's almost no heavy metal ion in clear water after separating；
(2) there is high charge Fe3+、Zn2+With SO4 2-The presence of plasma can have charge neutrality effect to micelle in muddy water,
The zeta potential that can effectively reduce or eliminate suspension micelle in water keeps micelle de- steady, and the rapid subsidence for particulate matter in muddy water is established
Basis；
(3) modified inorganic flocculant contains the polysilicon acid of high molecular weight, with reticular structure, can fill in muddy water environment
Distribution waves adsorption net and catches the volume effect of sweeping, to improve coagulation speed；In addition, the presence of zinc ion, is modified inorganic flocculant
Long-acting flocculating effect provide advantageous guarantee；
(4) polyferric silicate sulfate, polymeric aluminium ferrum silicate, polymer phosphate ferro-aluminum, poly aluminium sulfate silicate and polymeric aluminum sulfate iron,
The groups such as polymer aluminium silicate are divided into composite inorganic macromolecular flocculant, have strong adsorption bridging ability to micelle in muddy water,
To the coagulation significant effect of micelle；
(5) filter aid is a polyporous materials, can promote separation of solid and liquid.
Therefore, compared with current shield Slurry treatment technology, the present invention has following advantages and good effect
(1) muddy water can be achieved in the near coal-mine quick separating of shield, both do not need storage field in this way, can also be achieved water in muddy water and provide
The recycling in source, the water recycled reach the above standards for industrial water usage of national two classes；
(2) transportational process caused by reducing shield muddy water conventional processing technique due to running, emitting, leak, drip etc. pollutes
Problem；
(3) by there is no organic principle in developed modified inorganic flocculant, for macromolecule organic in separated mud, water
Reduction lay a good foundation, alleviate mud, water to the potential hazard of environment；
(4) due to not needing special shield muddy water storage field, water can also realize reuse, to make shield mud cost of disposal
It is reduced；
(5) shield muddy water rapid separation of the present invention is simple, convenient.
Specific embodiment
Below with reference to embodiment, the invention will be further described, but the present invention is not limited thereto.
The mud cake being obtained by filtration is placed in 120 DEG C of baking ovens dry 4h, tests its weight-loss ratio, as moisture content.
Embodiment 1
Using ferric-polysilicate as the shield muddy water solid-liquid quick separating modified inorganic flocculant of inorganic flocculating agent and modification side
Method and its corresponding mud-water separation technique
1, the volume mass concentration of modified inorganic flocculant are as follows: 50g/L.
2, the preparation step of shield muddy water quick separating modifying agent:
Step 1: iron content, zinc feed liquid are prepared
The iron filings of 20g/L, the concentrated sulfuric acid of 10mL/L are added into the solution of zinc sulfate that zinc ion concentration is 50mg/L,
It is stirred to react 60min at 30-40 DEG C, the hydrogen peroxide of 1g/L is added later, iron content, zinc feed liquid is obtained by filtration；
Step 2: siliceous feed liquid is prepared
Waterglass is added in distilled water and obtains the waterglass weak solution that wherein silica quality score is 0.025, so
Afterwards under agitation instilling the concentrated sulfuric acid in waterglass weak solution makes its pH value reach 2, continues after stirring 120min, then quiet
Set 2h or more；Obtain siliceous feed liquid；
Step 3: preparing modifying agent
It measures siliceous feed liquid prepared by 150mL (2) and iron content prepared by (1) of 1L is added, in zinc feed liquid, obtained after stirring
Iron content, zinc, silicon modifying agent.
3, the method for modifying of modified inorganic flocculant
The ferric-polysilicate for weighing 50g is added in 1L modifying agent, and achievable shield of the present invention is obtained after being sufficiently stirred
The modified inorganic flocculant of muddy water quick separating.
4, the method for the shield muddy water quick separating based on modified inorganic flocculant prepared by the present invention
Firstly, the solid-to-liquid ratio separated in bulky grain gravel muddy water is adjusted to 1:3, then sequentially add of the present invention
After modified inorganic flocculant, pH adjusting agent and filter aid, it is filtered immediately using sheet frame after simple agitation.
The additional amount of modified inorganic flocculant is that 10mL is added in every liter of muddy water；
PH adjusting agent uses sodium carbonate, and shield muddy water tune pH value is added and reaches 9~10；
0.5g diatomite is added in every liter of mud to be processed as filter aid；
Modified inorganic flocculant stirring be added muddy water after without stop, pH adjusting agent is first directly just added, and then plus
It is filtered immediately after entering filter aid.
By the above method, it can be achieved that muddy water being directly separated near coal-mine live, and the moisture content of separated mud extraction is low
In 25%；Filtering gained clear water is sent authoritative institution to detect, and reaches two class standards for industrial water usage.The filtration time of 1L muddy water less than
2 minutes.
Embodiment 2
As the shield muddy water solid-liquid quick separating modified inorganic flocculant of inorganic flocculating agent and changed using polymeric aluminum sulfate iron
Property method
1, the volume mass concentration of modified inorganic flocculant are as follows: 100g/L.
2, the preparation step of shield muddy water quick separating modifying agent:
Step 1: iron content, zinc feed liquid are prepared
The iron filings of 10g/L, the concentrated sulfuric acid of 10mL/L are added into the solution of zinc sulfate that zinc ion concentration is 200mg/L,
It is stirred to react 90min at 40 DEG C, the hydrogen peroxide of 2g/L is added later, filters to obtain iron content, zinc feed liquid；
Step 2: siliceous feed liquid is prepared
Waterglass is added in distilled water and obtains the waterglass weak solution that wherein silica quality score is 0.02, then
The concentrated sulfuric acid, which is instilled in waterglass weak solution, under agitation makes its pH value reach 1.5, continues after stirring 120min, then quiet
Set 2h or more；Obtain siliceous feed liquid；
Step 3: preparing modifying agent
It measures siliceous feed liquid prepared by 150mL (2) and iron content prepared by (1) of 1L is added, in zinc feed liquid, obtained after stirring
Iron content, zinc, silicon modifying agent.
3, the method for modifying of modified inorganic flocculant
The polymeric aluminum sulfate iron for weighing 100g is added in 1L modifying agent, and of the present invention can be achieved is obtained after being sufficiently stirred
The modified inorganic flocculant of shield muddy water quick separating.
4, the method for the shield muddy water quick separating based on modified inorganic flocculant prepared by the present invention
Firstly, the solid-to-liquid ratio separated in bulky grain gravel muddy water is adjusted to 1:5, then sequentially add of the present invention
After modified inorganic flocculant, pH adjusting agent and filter aid, it is filtered immediately using sheet frame after simple agitation.
The additional amount of modified inorganic flocculant is that 10mL is added in every liter of muddy water；
PH adjusting agent uses calcium carbonate, and shield muddy water tune pH value is added and reaches 9~10；；
1g diatomite is added in every liter of mud to be processed as filter aid；
Modified inorganic flocculant stirring be added muddy water after without stop, pH adjusting agent is first directly just added, and then plus
It is filtered immediately after entering filter aid.
By the above method, it can be achieved that muddy water being directly separated near coal-mine live, and the moisture content of separated mud extraction is low
In 30%.；Filtering gained clear water is sent authoritative institution to detect, and reaches two class standards for industrial water usage.The filtration time of 1L muddy water is not
By 2 minutes)
Embodiment 3
1, using polymeric aluminium ferrum silicate as the shield muddy water solid-liquid quick separating modified inorganic flocculant of inorganic flocculating agent and
Method of modifying
1, the volume mass concentration of modified inorganic flocculant are as follows: 100g/L.
2, the preparation step of shield muddy water quick separating modifying agent:
Step 1: iron content, zinc feed liquid are prepared
The iron filings of 10g/L, the concentrated sulfuric acid of 20mL/L are added into the solution of zinc sulfate that zinc ion concentration is 500mg/L,
It is stirred to react 90min at 40 DEG C, the hydrogen peroxide of 2g/L is added later, iron content, zinc feed liquid is obtained by filtration；
Step 2: siliceous feed liquid is prepared
Waterglass is added in distilled water and obtains the waterglass weak solution that wherein silica quality score is 0.025, so
Afterwards under agitation instilling the concentrated sulfuric acid in waterglass weak solution makes its pH value reach 2.5, continues after stirring 120min, then
Stand 2h or more；Obtain siliceous feed liquid；
Step 3: preparing modifying agent
It measures siliceous feed liquid prepared by 200mL (2) and iron content prepared by (1) of 1L is added, in zinc feed liquid, obtained after stirring
Iron content, zinc, silicon modifying agent.
3, the method for modifying of modified inorganic flocculant
The polymeric aluminium ferrum silicate for weighing 100g is added in 1L modifying agent, and of the present invention can be achieved is obtained after being sufficiently stirred
The modified inorganic flocculant of shield muddy water quick separating.
4, the method for the shield muddy water quick separating based on modified inorganic flocculant prepared by the present invention
Firstly, the solid-to-liquid ratio separated in bulky grain gravel muddy water is adjusted to 1:5, then sequentially add of the present invention
After modified inorganic flocculant, pH adjusting agent and filter aid, it is filtered immediately using sheet frame after simple agitation.
The additional amount of modified inorganic flocculant is that 20mL is added in every liter of muddy water；
PH adjusting agent uses sodium carbonate, and shield muddy water tune pH value is added and reaches 9~10；；
1g diatomite is added in every liter of mud to be processed as filter aid；
Modified inorganic flocculant stirring be added muddy water after without stop, pH adjusting agent is first directly just added, and then plus
It is filtered immediately after entering filter aid.
By the above method, it can be achieved that muddy water being directly separated near coal-mine live, and the moisture content of separated mud extraction is low
In 30%%；Filtering gained clear water is sent authoritative institution to detect, and reaches two class standards for industrial water usage.The filtration time of 1L muddy water is not
By 2 minutes.
Claims (10)
1. a kind of shield muddy water solid-liquid quick separating modified inorganic flocculant, the modified inorganic flocculant is by inorganic flocculating agent
It is formed with modifying agent, 50-100g containing inorganic flocculating agent in every liter of modifying agent.
2. a kind of shield muddy water solid-liquid quick separating modified inorganic flocculant according to claim 1, it is characterised in that:
The inorganic flocculating agent is selected from polyferric silicate sulfate, polymeric aluminium ferrum silicate, polymer phosphate ferro-aluminum, poly aluminium sulfate silicate, polymerised sulphur
One of sour ferro-aluminum, polymer aluminium silicate.
3. a kind of shield muddy water solid-liquid quick separating modified inorganic flocculant according to claim 1, it is characterised in that:
The modifying agent is prepared as follows:
Step 1: iron content, zinc feed liquid are prepared
By solution of zinc sulfate, sulfuric acid, iron filings be mixed reaction at least after sixty minutes, be added hydrogen peroxide, filtering, filtrate be containing
Iron, zinc feed liquid；
Step 2: siliceous feed liquid is prepared
Prepare the waterglass weak solution of silica quality percentage concentration≤0.025%, agitation and dropping sulfuric acid tune pH value to 1.5-
2.5, obtain siliceous feed liquid；
Step 3: preparing modifying agent
Iron content, the zinc feed liquid for taking the first step to obtain are mixed with the siliceous feed liquid that second step obtains, and obtain modifying agent.
4. a kind of shield muddy water solid-liquid quick separating modified inorganic flocculant according to claim 3, it is characterised in that:
In the first step, zinc ion concentration is 50-500mg/L, 98% or more sulfuric acid mass percentage concentration in solution of zinc sulfate；
By 10-20g iron filings are added in every liter of solution of zinc sulfate, 10-20mL sulfuric acid is mixed, and is stirred to react 60- at 30-40 DEG C
After 90min, hydrogen peroxide is added into mixed liquor, the additional amount of hydrogen peroxide is added 1-2g by every liter of mixed liquor, filters to obtain iron content, zinc
Feed liquid.
5. a kind of shield muddy water solid-liquid quick separating modified inorganic flocculant according to claim 3, it is characterised in that:
In second step, waterglass weak solution concentration is 0.02-0.025%, after agitation and dropping sulfuric acid tune pH value to 1.5-2.5, continues to stir
After mixing 90-120min, 2h or more is stood, siliceous feed liquid is obtained.
6. a kind of shield muddy water solid-liquid quick separating modified inorganic flocculant described in -5 any one according to claim 1,
It is characterized by:, by 150-200mL iron content, zinc feed liquid is incorporated in every liter of siliceous feed liquid, obtaining modifying agent in third step.
7. a kind of method of modifying of shield muddy water solid-liquid quick separating modified inorganic flocculant, is incorporated by every liter of modifying agent
50-100g inorganic flocculating agent is simultaneously uniformly mixed.
8. a kind of application of shield muddy water solid-liquid quick separating modified inorganic flocculant is will to weigh 6 or 7 modified inorganics of power
Flocculant is applied in shield muddy water, near coal-mine to shield muddy water progress solid-liquid quick separating in shield machine.
9. a kind of application of shield muddy water solid-liquid quick separating modified inorganic flocculant according to claim 9, special
Sign is: after the solid-to-liquid ratio for the shield muddy water for having separated bulky grain gravel is adjusted to 1:3~1:5, sequentially adding modified inorganic
Flocculant, pH adjusting agent, filter aid, are filtered immediately after stirring.
10. a kind of application of shield muddy water solid-liquid quick separating modified inorganic flocculant according to claim 10,
Be characterized in that: the additional amount of the modified inorganic flocculant is that 5-10mL is added in every liter of shield muddy water；
The pH adjusting agent refers to one kind in sodium carbonate or calcium carbonate, is added and reaches 9~10 with shield muddy water pH value
Metering；
The filter aid is any one of diatomite or perlite, and 0.5-1g is added in every liter of mud to be processed.
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| CN201811113396.5A CN108975474A (en) | 2018-09-25 | 2018-09-25 | Shield muddy water solid-liquid quick separating modified inorganic flocculant and method of modifying and application |
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| CN110217910A (en) * | 2019-06-21 | 2019-09-10 | 中铁十四局集团大盾构工程有限公司 | A kind of processing method of slurry shield discarded slurry filters pressing waste water |
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Application publication date: 20181211 |