CN106630307A - System and method for treating coal gasification grey water - Google Patents
System and method for treating coal gasification grey water Download PDFInfo
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- CN106630307A CN106630307A CN201610873530.6A CN201610873530A CN106630307A CN 106630307 A CN106630307 A CN 106630307A CN 201610873530 A CN201610873530 A CN 201610873530A CN 106630307 A CN106630307 A CN 106630307A
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- 238000000034 method Methods 0.000 title claims abstract description 86
- 238000002309 gasification Methods 0.000 title abstract description 48
- 239000003245 coal Substances 0.000 title abstract description 37
- 239000010797 grey water Substances 0.000 title abstract description 21
- 238000001179 sorption measurement Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 104
- 238000003487 electrochemical reaction Methods 0.000 claims description 68
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 34
- 230000008569 process Effects 0.000 claims description 33
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 238000006243 chemical reaction Methods 0.000 claims description 24
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 22
- 238000005189 flocculation Methods 0.000 claims description 20
- 230000016615 flocculation Effects 0.000 claims description 20
- 238000001914 filtration Methods 0.000 claims description 19
- 238000004380 ashing Methods 0.000 claims description 18
- 238000001556 precipitation Methods 0.000 claims description 17
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 17
- 239000003513 alkali Substances 0.000 claims description 15
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 14
- 229910001424 calcium ion Inorganic materials 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 12
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 11
- 239000001569 carbon dioxide Substances 0.000 claims description 11
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 11
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 11
- 238000004062 sedimentation Methods 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 8
- 238000004581 coalescence Methods 0.000 claims description 8
- 229910000838 Al alloy Inorganic materials 0.000 claims description 7
- 229910001021 Ferroalloy Inorganic materials 0.000 claims description 6
- 238000005261 decarburization Methods 0.000 claims description 6
- 238000006477 desulfuration reaction Methods 0.000 claims description 6
- 230000023556 desulfurization Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 14
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 11
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 11
- 239000011575 calcium Substances 0.000 abstract description 11
- 229910052791 calcium Inorganic materials 0.000 abstract description 11
- 239000011777 magnesium Substances 0.000 abstract description 11
- 229910052749 magnesium Inorganic materials 0.000 abstract description 11
- 230000005684 electric field Effects 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 239000002351 wastewater Substances 0.000 abstract description 5
- 239000002244 precipitate Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 abstract 1
- 238000002848 electrochemical method Methods 0.000 abstract 1
- 239000010419 fine particle Substances 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 23
- 239000012535 impurity Substances 0.000 description 11
- 239000003643 water by type Substances 0.000 description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 9
- 238000005273 aeration Methods 0.000 description 9
- 239000003292 glue Substances 0.000 description 8
- 239000010865 sewage Substances 0.000 description 8
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 5
- 230000008676 import Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000005518 electrochemistry Effects 0.000 description 3
- 238000003908 quality control method Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000001117 sulphuric acid Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- 235000007926 Craterellus fallax Nutrition 0.000 description 1
- 240000007175 Datura inoxia Species 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- -1 float Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000004065 wastewater treatment 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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
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)
Abstract
The invention provides a system and a method for treating coal gasification grey water, which mainly solve the problems of hardness, turbidity, suspended matters and the like in the coal gasification grey water and thoroughly solve the problem of system scaling caused by high hardness in the coal gasification grey water. The system and the method for treating the grey water and the waste water have the advantages of less discharge, environmental friendliness, economy and feasibility. The technology is based on electrochemical method as main working principle, and through regulating pH value and alkalinity, calcium and magnesium hard ions are separated out through forming precipitate. Under the action of electric field, the air in factory is introduced simultaneously to generate high-activity adsorption radicals for adsorbing solid particles contained in grey water and newly formed fine particles of calcium-magnesium compound.
Description
Technical field
The present invention relates to Coal Gasification Technology field, more particularly to a kind of system and new method of gas treatment ashing water.
Background technology
New Coal Chemical is a highly water intensive industry, and this problem is also into the bottleneck problem of restriction Development of Coal Chemical Industry.
After new environmental law is implemented, while pursuing economic benefit, taking into account environmental and social benefits will become a kind of normality, become one
The whether successful criterion of individual project.New Coal Chemical enterprise major part is distributed in western ground of the coal resource storage compared with horn of plenty
Area, while ecology is more fragile, environmental contaminants capacity is little, while water resource is more deficient in these areas.Therefore, section is carried out
, can economize on water, reduce discharging the matter of utmost importance for becoming pendulum in coal chemical industry enterprises.
Tradition remove the method for the turbidity in buck and float be by the addition flocculant and dispersant toward system, it is right
Environmental effect is than larger.
Also, with powdered coal pressuring gasified and advanced Coal Gasification Technology of the coal water slurry gasification technology as representative, still cannot put
The scaling problem brought due to high rigidity in buck is taken off, the maintenance and operation of manufacturing enterprise is so largely increased
Pressure.
The content of the invention
For the deficiencies in the prior art, it is an object of the invention to provide a kind of system of gas treatment ashing water and side
Method, the present invention efficiently removes hardness, turbidity, float in coal gasification buck using the method for electrochemistry flocculation, solves coal
Gasification wastewater discharge capacity is big, the problem of scaling.
The present invention is achieved by the following technical solutions：
A kind of system of gas treatment ashing water, the system includes electrochemical reaction area and settling zone；
Wherein, electric flocculation reactor is placed with electrochemical reaction area, sedimentation tank area is disposed with swash plate and rotating machinery；Electricity
The outlet connection settling zone entrance of chemical reaction zone.
Further, the system also includes following arbitrary or its combination in any：
A) sodium carbonate liquor tank, sodium carbonate liquor pipeline and dosing pump；
B) converter unit, conversion condensed fluid pipeline and dosing pump；Or
C) desulfurization and decarburization unit, carbon dioxide gass fluid line and flow control valve.
Further, the system also includes buck surge tank, and electrochemical reaction area top is provided with overflow launder, overflow launder
It is connected with buck surge tank by pipeline.
Further, the electric flocculation reactor adopts ferroalloy materials or aluminum alloy materials as electrode.
Further, the system also includes alkali tank, sour tank and dosing pump, wherein the alkali tank is connected to by dosing pump
Electrochemical reaction area, sour tank is connected to the pipeline between overflow launder or overflow launder and buck surge tank by dosing pump.
Further, the system also includes vacuum filtering system and slush pump, wherein, the settling zone outlet passes through mud
Stock pump connects vacuum filtering system.
Meanwhile, present invention also offers a kind of method of gas treatment ashing water, the method is comprised the following steps：
1) in electrochemical reaction area, DC source is connected, and is passed through air, produce adsorption group；Meanwhile, by adjusting
PH and basicity, make the calcium ions and magnesium ions Precipitation in buck, and with adsorption group coalescence；
2) by step 1) process after the water that obtains precipitated, obtain mud and clear water；
3) to step 2) acid for adjusting pH is added between 7.0-9.0 in the clear water that obtains.
Further, step 1) in adjust the method for basicity be addition conversion condensed fluid, carbon dioxide or sodium carbonate
Arbitrary or its combination in any in solution.
Further, step 1) in adjust pH method for addition sodium hydroxide solution, make buck pH control in 9.0-
Between 10.5.
Further, methods described is also included step 2) mud that obtains filtered, and obtains buck after filtering residue and filter,
Buck is reentered and processed in electrochemical reaction area after filter.
Further, methods described is also included step 2) clear water that obtains reenters coal gasification apparatus after being pressurizeed
Reused.
The operation principle of electrochemistry flucculation process of the present invention is：
Place electric flocculation reactor in electrochemical reaction area, the electric flocculation reactor using metal iron alloy material or
Aluminum alloy materials, by powering up to pole plate and being passed through air, make pole plate electrolysis separate out Fe as electrode3+Or Al3+Into
In water, with OH-combination of dissolving in water Fe (OH) is generated3Or Al (OH)3And other monokaryon hydroxyl compounds, multinuclear hydroxyl
Coordination compound and polymer etc., the coordination compound of formation has extremely strong adsorptivity as a kind of efficient absorption group, recycles absorption
Build bridge and net is caught the impurity such as float, colloidal solid, macromolecule organic that volume is swept in effect absorption water and settled jointly.
Simultaneously using the pH value and basicity of regulating water quality, precipitate calcium ions and magnesium ions, concrete reaction equation is：
Ca2++OH-+HCO3 -→CaCO3+H2O；Mg2++2OH-→Mg(OH)2；
Produced precipitate by efficient absorption group Adsorption, so as to realize efficiently reducing the turbidity in water, colourity,
The effect of the impurity such as float, colloid, Organic substance.
The flow process that the method for the present invention is used is as shown in figure 1, be detailed further below the method for the present invention.
Coal gasification apparatus buck out is caused into electrochemical reaction area, electric flocculation reaction is placed in electrochemical reaction area
Device.Using ferroalloy materials or aluminum alloy materials as electrode, battery lead plate thin slice is arranged according to certain distance, the electricity per block
Pole plate is passed through unidirectional current, and adjacent two electrode plate is passed through electric current both positive and negative polarity conversely, and periodically exchanging both positive and negative polarity.Galvanic voltage
For 0～60V, preferably 10～40V.Current intensity is 1～40A, preferably 5～25A.
Preferably, factory air is passed through into electrochemical reaction area, it can promote Fe2+It is oxidized to Fe3+, so as to promote to generate
High activity adsorption group.It is highly preferred that precipitation is formed to prevent from being reacted on the electrode of electric flocculation reactor, factory is empty
Gas is passed through the middle and lower part in electrochemical reaction area.And flow control valve is set, air mass flow is adjusted as needed.
So that in the presence of electric field and aeration, high activity adsorption group is produced in electrochemical reaction area, in absorption water
The impurity such as colloid, float, form larger batting-unit structure and separate out from water.
Simultaneously by fine setting pH and basicity, the calcium ions and magnesium ions in water are made to precipitate and separate out, with active group coalescence.
To reduce the grey water hardness, magnesium ion in buck is set fully to react generation magnesium hydrate precipitate, the present invention is to buck
PH is adjusted, and concrete grammar is that the sodium hydroxide solution Jing meterings in alkali tank are pumped into into electrochemical reaction area, is existed by pH
Line analysis come control measure pump discharge, make pH control between 9.0 to 10.5.
To reduce the grey water hardness, calcium ion in buck is set fully to react generation precipitation of calcium carbonate, the present invention is also needed to ash
The carbonic acid and bicarbonate basicity of water is adjusted, and concrete grammar is：Low pressure is converted into condensed fluid, carbon dioxide or sodium carbonate
Arbitrary or its combination in any in solution is added to reaction zone, to be formed to prevent from being reacted on the electrode of electric flocculation reactor
Precipitation, preferably adds it to the position below battery lead plate.
Wherein, the low pressure conversion condensed fluid may be from converter unit, and by Flux Valve Control flow, it adds
Enter amount for 0～260Kg/1t gasification ash waters, preferably 1～80Kg/1t gasification ash waters；The carbon dioxide may be from coal gas
The desulfurization and decarburization unit that makeup is put, and by Flux Valve Control flow, its addition is 0～15Nm3/ 1t gasification ash waters,
It is preferred that 1～5Nm3/ 1t gasification ash waters；The sodium carbonate liquor comes from sodium carbonate liquor basin and by dosing pump controlling stream
Amount, its addition be 0～5Kg/1t gasification ash waters, preferably 0.2～1.5Kg/1t gasification ash waters.
Water enters settling zone from reaction zone bottom after processing Jing electrochemical reaction area, in settling zone, in order to increase sedimentation
Effect, the efficient swash plate of arranging multiplayer in sedimentation tank；In order to settle more it is uniform prevent from being blocked in arranging in sedimentation tank rotate
Agitating device, so that under the floccule body Jing sedimentation tanks major part that the solid matter contained in buck and reaction are formed is precipitated
Come, obtain mud and clear water.The cone bottom of mud Jing settling zones is pumped to vacuum filtering system and is filtered by slurry, is filtered
Buck after slag and filter, the buck Jing after vacuum filtering system is filtered is reentered and processed in electrochemical reaction area.In precipitation
The clear water that area obtains is entered in overflow launder through downflow weir, is then sent into into buck surge tank by going out pipeline.
Preferably, also factory air can be passed through to the middle and upper part of settling zone to promote high activity group fully to flocculate, and set
Flow control valve is put, air mass flow is adjusted as needed.
In order that settling zone processes the clear water that obtains and meets system reuse requirement, in addition it is also necessary to which acid adding is adjusting the pH of clear water.
Acid solution is pumped in the pipeline in overflow launder or between feeding overflow launder and buck surge tank by metering in sour tank.Pass through
The pH on-line analyses of buck surge tank outlet controlling the flow of sour dosing pump, make outlet buck pH controls 7.0 to 9.0 it
Between.Wherein added acid includes but is not limited to hydrochloric acid, nitric acid or sulphuric acid.
Major part reenters coal gasification apparatus recycling to clear water after the pressurization of grey water pump in buck surge tank；It is few
Part is through heat exchange cooling heel row to sewage disposal system.Control to drain into sewage disposal system by buck surge tank water quality
The water yield.
Beneficial effects of the present invention are as follows：
The invention provides the system and technique of a kind of gas treatment ashing water, solve coal gasification wastewater discharge capacity it is big,
The problem of scaling.The present invention adopts the method that electrochemistry is flocculated effectively to reduce the hardness in coal gasification buck, turbidity and hang
Float concentration, the system and technique of the present invention is high for the waste water treatment efficiency of high rigidity, high concentrtion and high suspended matter concentration, this
Handled waste water its turbidity of invention may be up to 7000mg/L, and concentration of suspension is up to 6700mg/L, and hardness is up to 2090mg/L,
Far above the ability that waste water is processed in prior art, up to more than 99%, hardness clearance reaches for its float and turbidity removal rate
More than 82%.
Description of the drawings
Fig. 1 is the process chart of gas treatment ashing water；
Fig. 2 is the system diagram of gas treatment ashing water；Wherein, 1 is electrochemical reaction area, and 2 is settling zone, and 31 is alkali tank,
32 is dosing pump, and 41 is sodium carbonate liquor basin, and 42 is dosing pump, and 5 are sour tank, and 6 is buck surge tank, and 7 are grey water pump, and 8 are
Slush pump, 9 is vacuum filtering system.
Specific embodiment
In order to be illustrated more clearly that the present invention, with reference to embodiment, the present invention is described further.This area skill
Art personnel should be appreciated that following specifically described content is illustrative and be not restrictive, and should not limit the present invention with this
Protection domain.
Embodiment 1
The system of the gas treatment ashing water that the present invention is provided, including electrochemical reaction area and settling zone；
Wherein, electric flocculation reactor is placed with electrochemical reaction area, electric flocculation reactor is using ferroalloy materials or aluminum
Alloy material is used as electrode；Sedimentation tank area is disposed with swash plate and rotating machinery；The outlet connection settling zone in electrochemical reaction area enters
Mouthful.In grey water treatment procedure, unidirectional current is passed through to electrode, in the presence of electric field and aeration, can be produced in electrochemical reaction area
The impurity such as raw adsorption group, absorption water-borne glue body, float, form larger batting-unit structure and separate out from water；Subsequently enter
Settling zone, the swash plate and rotating machinery of settling zone act as more uniform preventing blocking so that settling.
The system also includes sodium carbonate liquor tank, sodium carbonate liquor pipeline and dosing pump, and it is used to add into reaction zone
Plus sodium carbonate liquor, sunk with adjusting the carbonic acid and bicarbonate basicity of buck and making calcium ion in buck fully react generation Calcium Carbonate
Form sediment；Wherein, the entrance of sodium carbonate liquor pipeline is connected with sodium carbonate liquor tank, and outlet is located in electrochemical reaction area under battery lead plate
Side；
Further, the system also includes alkali tank and dosing pump, wherein the alkali tank is connected to electrification by dosing pump
Learn reaction zone to be used for adjusting the pH of buck, pH is controlled between 9.0 to 10.5；Dosing pump is used to control the flow of alkali liquor.
Further, the system also includes buck surge tank, and electrochemical reaction area top is provided with overflow launder, overflow launder
It is connected with buck surge tank by pipeline；The outlet of buck surge tank is connected with grey water pump, and it can pressurize to clear water after process, make
Most of clear water reenters coal gasification apparatus and is reused, and small part drains into sewage disposal system；And also can pass through
The water quality of buck surge tank carrys out the water yield that Quality Control drains into sewage disposal system.
Further, the system also includes sour tank and dosing pump, wherein sour tank by dosing pump be connected to overflow launder or
Pipeline between person's overflow launder and buck surge tank, for clear water addition acid after process so that the pH controls of clear water after process
Between 7.0 to 9.0, it is easy to reenter coal gasification apparatus and is circulated utilization.
Further, the system also includes vacuum filter system machine and slush pump, wherein, the settling zone outlet passes through mud
Stock pump is connected with vacuum filter；Wherein vacuum filter is filtered to the mud that settling zone is formed, after obtaining filtering residue and filter
Buck；Buck is processed in electrochemical reaction area again after filter, and filtering residue carries out the process such as burning.
Embodiment 2
The system of the gas treatment ashing water that the present invention is provided, including electrochemical reaction area and settling zone；
Wherein, electric flocculation reactor is placed with electrochemical reaction area, electric flocculation reactor is using ferroalloy materials or aluminum
Alloy material is used as electrode；Sedimentation tank area is disposed with swash plate and rotating machinery；The outlet connection settling zone in electrochemical reaction area enters
Mouthful.In grey water treatment procedure, unidirectional current is passed through to electrode, in the presence of electric field and aeration, can be produced in electrochemical reaction area
The impurity such as raw high activity adsorption group, absorption water-borne glue body, float, form larger batting-unit structure and separate out from water；With
Enter settling zone afterwards, the swash plate and rotating machinery of settling zone act as causing settling and more uniform prevent from blocking.
The system also includes converter unit, conversion condensed fluid pipeline and dosing pump, and it is used for the addition into reaction zone and becomes
Condensed fluid is changed, to adjust the basicity of buck and make calcium ion in buck fully react generation precipitation of calcium carbonate；Wherein, conversion condensation
The entrance in liquid pipe road is connected with converter unit, and outlet is located at battery lead plate lower section in electrochemical reaction area；
Further, the system also includes alkali tank and dosing pump, wherein the alkali tank is connected to electrification by dosing pump
Learn reaction zone to be used for adjusting the pH of buck, pH is controlled between 9.0 to 10.5；Dosing pump is used to control the flow of alkali liquor.
Further, the system also includes buck surge tank, and electrochemical reaction area top is provided with overflow launder, overflow launder
It is connected with buck surge tank by pipeline；The outlet of buck surge tank is connected with grey water pump, and it can pressurize to clear water after process, make
Most of clear water reenters coal gasification apparatus and is reused, and small part drains into sewage disposal system；And also can pass through
The water quality of buck surge tank carrys out the water yield that Quality Control drains into sewage disposal system.
Further, the system also includes sour tank and dosing pump, wherein sour tank by dosing pump be connected to overflow launder or
Pipeline between person's overflow launder and buck surge tank, for clear water addition acid after process so that the pH controls of clear water after process
Between 7.0 to 9.0, it is easy to reenter coal gasification apparatus and is circulated utilization.
Further, the system also includes vacuum filter system machine and slush pump, wherein, the settling zone outlet passes through mud
Stock pump is connected with vacuum filter；Wherein vacuum filter is filtered to the mud that settling zone is formed, after obtaining filtering residue and filter
Buck；Buck is processed in electrochemical reaction area again after filter, and filtering residue carries out the process such as burning.
Embodiment 3
The system of the gas treatment ashing water that the present invention is provided, including electrochemical reaction area and settling zone；
Wherein, electric flocculation reactor is placed with electrochemical reaction area, electric flocculation reactor is using ferroalloy materials or aluminum
Alloy material is used as electrode；Sedimentation tank area is disposed with swash plate and rotating machinery；The outlet connection settling zone in electrochemical reaction area enters
Mouthful.In grey water treatment procedure, unidirectional current is passed through to electrode, in the presence of electric field and aeration, can be produced in electrochemical reaction area
The impurity such as raw high activity adsorption group, absorption water-borne glue body, float, form larger batting-unit structure and separate out from water；With
Enter settling zone afterwards, the swash plate and rotating machinery of settling zone act as causing settling and more uniform prevent from blocking.
The system also includes desulfurization and decarburization unit, carbon dioxide and flow control valve, and it is used for into reaction zone
Carbon dioxide is passed through, to adjust the basicity of buck and make calcium ion in buck fully react generation precipitation of calcium carbonate；Wherein,
The entrance of carbon dioxide gass fluid line is connected with desulfurization and decarburization unit, and outlet is positioned at the lower section of battery lead plate in electrochemical reaction area；
Further, the system also includes alkali tank and dosing pump, wherein the alkali tank is connected to electrification by dosing pump
Learn reaction zone to be used for adjusting the pH of buck, pH is controlled between 9.0 to 10.5；Dosing pump is used to control the flow of alkali liquor.
Further, the system also includes buck surge tank, and electrochemical reaction area top is provided with overflow launder, overflow launder
It is connected with buck surge tank by pipeline；The outlet of buck surge tank is connected with grey water pump, and it can pressurize to clear water after process, make
Most of clear water reenters coal gasification apparatus and is reused, and small part drains into sewage disposal system；And also can pass through
The water quality of buck surge tank carrys out the water yield that Quality Control drains into sewage disposal system.
Further, the system also includes sour tank and dosing pump, wherein sour tank by dosing pump be connected to overflow launder or
Pipeline between person's overflow launder and buck surge tank, for clear water addition acid after process so that the pH controls of clear water after process
Between 7.0 to 9.0, it is easy to reenter coal gasification apparatus and is circulated utilization.
Further, the system also includes vacuum filter system machine and slush pump, wherein, the settling zone outlet passes through mud
Stock pump is connected with vacuum filter；Wherein vacuum filter is filtered to the mud that settling zone is formed, after obtaining filtering residue and filter
Buck；Buck is processed in electrochemical reaction area again after filter, and filtering residue carries out the process such as burning.
Embodiment 4
The method that the system of the gas treatment ashing water provided using the present invention carries out the grey water process, including following step
Suddenly：
1) in electrochemical reaction area, DC source is connected, and is passed through factory air.In the presence of electric field and aeration,
The impurity such as efficient absorption group, absorption water-borne glue body, float can be produced in electrochemical reaction area, larger floccule body knot is formed
Structure is separated out from water；
Meanwhile, by adding sodium hydroxide solution to adjust pH between 9.0 to 10.5 to electrochemical reaction area, and adjust
Basicity, makes the calcium ions and magnesium ions Precipitation in buck, and with efficient absorption group coalescence；
Wherein, the method for adjusting basicity is that the low pressure for coming from converter unit is converted into condensed fluid to be added to reaction zone, and
By Flux Valve Control flow, its addition is 1～80Kg/1t gasification ash waters；To prevent the electricity in electric flocculation reactor
React to form precipitation on extremely, preferably add it to the position below battery lead plate.
2) by step 1) process after the water that obtains precipitated into settling zone by electrochemical reaction area bottom, obtain mud
And clear water；Also factory air can be passed through to the middle and upper part of settling zone to promote high activity group fully to flocculate, and flow tune is set
Section valve, adjusts as needed air mass flow.
3) to step 2) salt acid for adjusting pH is added between 7.0-9.0 in the clear water that obtains.
Further, methods described is also included step 2) mud that obtains delivers to vacuum filter and filtered, obtain
Buck after filtering residue and filter, buck is reentered and processed in electrochemical reaction area after filter.
Further, methods described is also included step 2) clear water that obtains reenters coal gasification apparatus after being pressurizeed
Reused.
The clear water for taking untreated coal gasification buck and being obtained using the inventive method detected, the following institute of Testing index
Show：
Import gasification ash water water quality is：PH is 8.5, and turbidity is 7000mg/L, and float is 6700mg/L, and total hardness is
1750mg/L, total magnesium is 36mg/L, and total calcium is 775mg/L.Buck water quality is that PH is 8.1 after this PROCESS FOR TREATMENT, and turbidity is
30mg/L, float is 25mg/L, and total hardness is 312mg/L, and total magnesium is 2.4mg/L, and total calcium is 112mg/L.
Embodiment 5
The method that the system of the gas treatment ashing water provided using the present invention carries out the grey water process, including following step
Suddenly：
1) in electrochemical reaction area, DC source is connected, and is passed through factory air.In the presence of electric field and aeration,
The impurity such as efficient absorption group, absorption water-borne glue body, float can be produced in electrochemical reaction area, larger floccule body knot is formed
Structure is separated out from water；
Meanwhile, by adding sodium hydroxide solution to adjust pH between 9.0 to 10.5 to electrochemical reaction area, and adjust
Basicity, makes the calcium ions and magnesium ions Precipitation in buck, and with efficient absorption group coalescence；
Wherein, the method for adjusting basicity is to add the carbon dioxide for coming from coal gasification apparatus desulfurization and decarburization unit
To reaction zone, and by Flux Valve Control flow, its addition is 1～5Nm3/ 1t gasification ash waters；To prevent in electric flocculation
React to form precipitation on the electrode of reactor, preferably add it to the position below battery lead plate.
2) by step 1) process after the water that obtains precipitated into settling zone by electrochemical reaction area bottom, obtain mud
And clear water；Also factory air can be passed through to the middle and upper part of settling zone to promote high activity group fully to flocculate, and flow tune is set
Section valve, adjusts as needed air mass flow.
3) to step 2) nitre acid for adjusting pH is added between 7.0-9.0 in the clear water that obtains.
Further, methods described is also included step 2) mud that obtains delivers to vacuum filter and filtered, obtain
Buck after filtering residue and filter, buck is reentered and processed in electrochemical reaction area after filter.
Further, methods described is also included step 2) clear water that obtains reenters coal gasification apparatus after being pressurizeed
Reused.
The clear water for taking untreated coal gasification buck and being obtained using the inventive method detected, the following institute of Testing index
Show：
Import gasification ash water water quality is：PH is 8.7, and turbidity is 6000mg/L, and float is 5910mg/L, and total hardness is
2090mg/L, total magnesium is 87.5mg/L, and total calcium is 776mg/L.Buck water quality is that PH is 8.2 after this PROCESS FOR TREATMENT, turbidity
For 28mg/L, float is 24mg/L, and total hardness is 365mg/L, and total magnesium is 7.1mg/L, and total calcium is 148mg/L.
Embodiment 6
The method that the system of the gas treatment ashing water provided using the present invention carries out the grey water process, including following step
Suddenly：
1) in electrochemical reaction area, DC source is connected, and is passed through factory air.In the presence of electric field and aeration,
The impurity such as efficient absorption group, absorption water-borne glue body, float can be produced in electrochemical reaction area, larger floccule body knot is formed
Structure is separated out from water；
Meanwhile, by adding sodium hydroxide solution to adjust pH between 9.0 to 10.5 to electrochemical reaction area, and adjust
Basicity, makes the calcium ions and magnesium ions Precipitation in buck, and with efficient absorption group coalescence；
Wherein, the method for adjusting basicity is that sodium carbonate liquor is added to into reaction zone, and controls flow by dosing pump, its
Addition is 0.2～1.5Kg/1t gasification ash waters, and to prevent from being reacted on the electrode of electric flocculation reactor precipitation is formed, excellent
Choosing adds it to the position below battery lead plate.
2) by step 1) process after the water that obtains precipitated into settling zone by electrochemical reaction area bottom, obtain mud
And clear water；Also factory air can be passed through to the middle and upper part of settling zone to promote high activity group fully to flocculate, and flow tune is set
Section valve, adjusts as needed air mass flow.
3) to step 2) sulfur acid for adjusting pH is added between 7.0-9.0 in the clear water that obtains.
Further, methods described is also included step 2) mud that obtains delivers to vacuum filter and filtered, obtain
Buck after filtering residue and filter, buck is reentered and processed in electrochemical reaction area after filter.
Further, methods described is also included step 2) clear water that obtains reenters coal gasification apparatus after being pressurizeed
Reused.
The clear water for taking untreated coal gasification buck and being obtained using the inventive method detected, the following institute of Testing index
Show：
Import gasification ash water water quality is：PH is 8.5, and turbidity is 20mg/L, and float is 27mg/L, and total hardness is
1290mg/L, total magnesium is 26.2mg/L, and total calcium is 416mg/L.Buck water quality is that PH is 7.9 after this PROCESS FOR TREATMENT, turbidity
For 4mg/L, float is 5mg/L, and total hardness is 158mg/L, and total magnesium is 2.6mg/L, and total calcium is 38mg/L.
Embodiment 7
The method that the system of the gas treatment ashing water provided using the present invention carries out the grey water process, including following step
Suddenly：
1) in electrochemical reaction area, DC source is connected, and is passed through factory air.In the presence of electric field and aeration,
The impurity such as efficient absorption group, absorption water-borne glue body, float can be produced in electrochemical reaction area, larger floccule body knot is formed
Structure is separated out from water；
Meanwhile, by adding sodium hydroxide solution to adjust pH between 9.0 to 10.5 to electrochemical reaction area, and adjust
Basicity, makes the calcium ions and magnesium ions Precipitation in buck, and with efficient absorption group coalescence；
Wherein, the method for adjusting basicity is while being added to by sodium carbonate liquor, conversion condensed fluid and carbon dioxide
Reaction zone, and by controlling flow, its addition is respectively 0.2Kg/1t gasification ash waters, 20Kg/1t gasification ash waters and 1Nm3/1t
Gasification ash water, to prevent from being reacted on the electrode of electric flocculation reactor precipitation is formed, preferably add it to battery lead plate with
Under position.
2) by step 1) process after the water that obtains precipitated into settling zone by electrochemical reaction area bottom, obtain mud
And clear water；Also factory air can be passed through to the middle and upper part of settling zone to promote high activity group fully to flocculate, and flow tune is set
Section valve, adjusts as needed air mass flow.
3) to step 2) sulfur acid for adjusting pH is added between 7.0-9.0 in the clear water that obtains.
Further, methods described is also included step 2) mud that obtains delivers to vacuum filter and filtered, obtain
Buck after filtering residue and filter, buck is reentered and processed in electrochemical reaction area after filter.
Further, methods described is also included step 2) clear water that obtains reenters coal gasification apparatus after being pressurizeed
Reused.
The clear water for taking untreated coal gasification buck and being obtained using the inventive method detected, the following institute of Testing index
Show：
Import gasification ash water water quality is：PH is 8.5, and turbidity is 20mg/L, and float is 27mg/L, and total hardness is
1290mg/L, total magnesium is 26.2mg/L, and total calcium is 416mg/L.Buck water quality is that PH is 7.9 after this PROCESS FOR TREATMENT, turbidity
For 4mg/L, float is 5mg/L, and total hardness is 140mg/L, and total magnesium is 2.6mg/L, and total calcium is 36mg/L.
Comparative example
The method that the system of the gas treatment ashing water provided using the present invention carries out the grey water process, including following step
Suddenly：
1) in electrochemical reaction area, DC source is connected, and is passed through factory air.In the presence of electric field and aeration,
The impurity such as efficient absorption group, absorption water-borne glue body, float can be produced in electrochemical reaction area, larger floccule body knot is formed
Structure is separated out from water；
Meanwhile, by adding sodium hydroxide solution to adjust pH between 9.0 to 10.5 to electrochemical reaction area, make buck
In calcium ions and magnesium ions Precipitation, and with efficient absorption group coalescence；
2) by step 1) process after the water that obtains precipitated into settling zone by electrochemical reaction area bottom, obtain mud
And clear water；Also factory air can be passed through to the middle and upper part of settling zone to promote high activity group fully to flocculate, and flow tune is set
Section valve, adjusts as needed air mass flow.
3) to step 2) add sulphuric acid to adjust the pH of clear water between 7.0-9.0 in the clear water that obtains.
Further, methods described is also included step 2) mud that obtains delivers to vacuum filter and filtered, obtain
Buck after filtering residue and filter, buck is reentered and processed in electrochemical reaction area after filter.
Further, methods described is also included step 2) clear water that obtains reenters coal gasification apparatus after being pressurizeed
Reused.
The clear water for taking untreated coal gasification buck and being obtained using the inventive method detected, the following institute of Testing index
Show：
Import gasification ash water water quality is：PH is 8.5, and turbidity is 20mg/L, and float is 27mg/L, and total hardness is
1290mg/L, total magnesium is 26.2mg/L, and total calcium is 416mg/L.Buck water quality is that PH is 7.9 after this PROCESS FOR TREATMENT, turbidity
For 4mg/L, float is 7mg/L, and total hardness is 590mg/L, and total magnesium is 12mg/L, and total calcium is 166mg/L.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not right
The restriction of embodiments of the present invention, for those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms, all of embodiment cannot be exhaustive here, it is every to belong to this
Obvious change that bright technical scheme is extended out changes row still in protection scope of the present invention.
Claims (10)
1. a kind of system of gas treatment ashing water, it is characterised in that the system includes electrochemical reaction area and settling zone；
Wherein, electric flocculation reactor is placed with electrochemical reaction area, the electric flocculation reactor is using ferroalloy materials or aluminum
Alloy material is used as electrode；Sedimentation tank area is disposed with swash plate and rotating machinery；The outlet connection settling zone in electrochemical reaction area enters
Mouthful.
2. system according to claim 1, it is characterised in that the system also includes following arbitrary or its combination in any：
A) sodium carbonate liquor tank, sodium carbonate liquor pipeline and dosing pump；
B) converter unit, conversion condensed fluid pipeline and dosing pump；Or
C) desulfurization and decarburization unit, carbon dioxide gass fluid line and flow control valve.
3. system according to claim 1, it is characterised in that the system also includes buck surge tank.
4. system according to claim 3, it is characterised in that electrochemical reaction area top is provided with overflow launder, overflow launder leads to
Piping is connected with buck surge tank.
5. system according to claim 3, it is characterised in that the system also includes alkali tank, sour tank and dosing pump, wherein
The alkali tank is connected to electrochemical reaction area by dosing pump, and sour tank is connected to overflow launder or overflow launder with ash by dosing pump
Pipeline between water surge tank.
6. system according to claim 1, it is characterised in that the system also includes vacuum filtering system and slush pump,
Wherein, the settling zone outlet connects vacuum filtering system by slush pump.
7. a kind of method of gas treatment ashing water, it is characterised in that comprise the following steps：
1) in electrochemical reaction area, DC source is connected, and is passed through air, produce adsorption group；Meanwhile, by adjust pH and
Basicity, makes the calcium ions and magnesium ions Precipitation in buck, and with adsorption group coalescence；
2) by step 1) process after the buck that obtains precipitated, obtain mud and clear water；
3) to step 2) acid for adjusting pH is added between 7.0-9.0 in the clear water that obtains.
8. method according to claim 7, it is characterised in that step 1) in adjust the method for basicity be addition conversion condensation
Arbitrary or its combination in any in liquid, carbon dioxide or sodium carbonate liquor.
9. method according to claim 7, it is characterised in that step 1) in adjust pH method it is molten for addition sodium hydroxide
Liquid, makes buck pH control between 9.0-10.5.
10. method according to claim 7, it is characterised in that methods described is also included step 2) mud that obtains enters
Row is filtered.
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| CN108101160A (en) * | 2017-12-08 | 2018-06-01 | 中国石油天然气集团公司 | A kind of petrochemical plant rain drainage processing method and its device and system |
| CN109502842A (en) * | 2018-12-26 | 2019-03-22 | 大连东道尔膜技术有限公司 | A kind of coal gasifier wastewater treatment and resource utilization process |
| CN110482587A (en) * | 2019-09-24 | 2019-11-22 | 河南心连心化学工业集团股份有限公司 | A kind of device and recovery method of gasification ash water classification recycling precipitated calcium carbonate |
| CN112479445A (en) * | 2020-10-28 | 2021-03-12 | 中石化宁波工程有限公司 | Process and equipment for treating coal gasification ash water |
| CN114105376A (en) * | 2021-09-30 | 2022-03-01 | 中海油天津化工研究设计院有限公司 | Electrochemical hardness removal method for high-hardness low-carbonate alkalinity coal gasification grey water |
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