CN110272159A - The recycling processing method and device of inorganic salts in a kind of industrial wastewater - Google Patents
The recycling processing method and device of inorganic salts in a kind of industrial wastewater Download PDFInfo
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- CN110272159A CN110272159A CN201910519486.2A CN201910519486A CN110272159A CN 110272159 A CN110272159 A CN 110272159A CN 201910519486 A CN201910519486 A CN 201910519486A CN 110272159 A CN110272159 A CN 110272159A
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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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
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention provides the recycling processing methods and device of inorganic salts in a kind of industrial wastewater, including first stage precipitation tank, connect original water inlet, and the colloidal silicon for being precipitated in raw water recycles the silica of precipitation after filtering for the first time；Level-one low-temperature evaporation concentration device, connect with first stage precipitation tank, is precipitated after the solvable silicon in raw water is concentrated into supersaturation；Second level low-temperature evaporation concentration device is connect with level-one low-temperature evaporation concentration device, and the silica in stoste is continued to be concentrated into supersaturated precipitation；Concentrate tapping equipment is connect with second level low-temperature evaporation concentration device, concentrate discharge in place will be concentrated, the present invention uses low-temperature evaporation crystallization processes, can prevent equipment scaling；Change traditional chemical silicon removing process as whole physics silicon removing process, reduce dosing cost, improve the concentration of recovery of silica, and shorten process flow, investment is few, and recycling degree is big, do not generate secondary pollution, the silica of precipitation can complete-reclaiming in production line.
Description
Technical field
The present invention relates to industrial wastewater fields, and in particular in a kind of industrial wastewater the recycling processing method of inorganic salts and
Device.
Background technique
At present in carbon white production process, a large amount of silicon-containing wastewater can be generated, wherein the silicate contained is in terms of SiO2
Reachable 2.0% ~ 4.0%, and it is quite stable.The silicon in waste water that production catalyst is arranged is brought by raw water glass, reaction
The SiO2 of nascent state is initially at crystalline state in the process, forms true solution, but the SiO2 dissolved has very big polymerizing power,
It can be gradually combined to form typical electronegative SiO2 colloidal solution.It can be mutual between water-borne glue body silicon and dissolution silicon
Conversion, the generally aobvious alkalinity of these waste water, and temperature is higher, colloidal silicon is easily converted to dissolution silicon in waste water, if be directly discharged to
In natural water, as pH and temperature are reduced, SiO2 settles out at gel or floccule, forms plain boiled water, and polluted-water blocks water
Road.Processing for this kind of waste water, both at home and abroad not yet recycling example, common waste water silicon removing method have coagulation except silicon,
It is reverse osmosis except silicon, ultrafiltration are except silicon, electric flocculation are except silicon, ion exchange are except silicon etc., wherein coagulation except silicon is easy to operate, process is simple,
It is most widely used.
Coagulation except silicon is reached the absorption of silicon or cohesion except silicon mesh using the oxide or hydroxide of certain metals
A kind of physico-chemical process, this is a kind of method that non-depth removes silicon, can be divided into magnesia mixture except silicon, aluminium salt are except silicon, molysite remove
Silicon and lime remove silicon.Single coagulating sedimentation can remove 60% colloidal silicon, and dissolution silicon removal rate is low, and reaction condition requires height, give up
Water is poor except silicon effect, and added amount of chemical is big and effluent quality is unstable.Number of patent application CN201821473122.2 is related to one
Kind industrial wastewater recycling with high salt and reclamation set, including sour pond, the first evaporating column and the second evaporating column are adjusted, first evaporation
Waste liquid spray head is equipped in tower, which is connected to the sour pond of tune, and the top of first evaporating column and the second evaporating column passes through
The lower part of the connection of first gas transmission pipeline, first evaporating column and the second evaporating column is connected by second gas transmission pipeline
It is logical, absorbing liquid spray head is equipped in second evaporating column, the absorbing liquid spray head and the second evaporation tower bottom are by absorbing liquid pipe
Road connection.Although the invention can clean waste water to a certain extent, pollution will not be generated, the reduction for job costs
Good effect is not reached.
Summary of the invention
To solve the above problems, the present invention provides the recycling processing methods and dress of inorganic salts in a kind of industrial wastewater
It sets.
To realize the technical purpose, the technical scheme is that in a kind of industrial wastewater at the recycling of inorganic salts
Reason method, which comprises the following steps:
S1: raw water is imported in first stage precipitation tank, and then carries out preliminary sedimentation, precipitates recovery section silica；
S2: by the preliminary sedimentation of step S1, the remaining clear liquid obtained after preliminary sedimentation is circulated to the concentration of level-one low-temperature evaporation
In device, to be precipitated after the solvable silicon in it is concentrated into supersaturation；
S3: by the processing of step S2, the concentrated clear liquid of preliminary low temperature being circulated in second level low-temperature evaporation concentration device, after
It is continuous to be concentrated into supersaturation analysis silica；
S4: by the concentration again of step S3, the concentrate after secondary concentration being transferred out, and knot is evaporated in electrical secondary system
It is brilliant.
The invention has the advantages that equipment scaling can be prevented using low-temperature evaporation crystallization processes；Change traditional chemical to remove
Silicon technology is whole physics silicon removing process, to reduce dosing cost, improves the concentration of recovery of silica, and shorten technique stream
Journey, investment is few, and recycling degree is big, does not generate secondary pollution, the silica of precipitation can complete-reclaiming in production line, then
Secondary reduction job costs.
In a preferred embodiment of the invention, on the basis of foregoing teachings, further include in the step S1
Following steps:
A1: waste water is imported into first stage precipitation tank, is rested in first stage precipitation tank, is filtered by devices such as filter layers useless
Colloidal silicon in water；
A2: by the standing effect in step A1, the colloidal silicon being deposited in first stage precipitation tank is filtered precipitation, from level-one
Discharge in sedimentation basin.
Further, further comprising the steps of in the step S2:
B1: the remaining clear liquid after preliminary sedimentation flows into level-one low-temperature evaporation concentration device, controls to adjust the temperature in enrichment facility
Degree, to control the cycles of concentration of silica；
B2: being precipitated by the concentration in step B1, then the silica being precipitated is filtered discharge by filtering.
Further, further comprising the steps of in the step S3:
C1: the clear liquid after level-one low-temperature evaporation concentration device passes through control again by second level low-temperature evaporation concentration device
The temperature that system is adjusted in enrichment facility carries out precipitation silica to control the cycles of concentration of silica again；
C2: being precipitated by the concentration in step C1, then the silica being precipitated is filtered discharge by filtering；
C3: being concentrated, concentrate refluxing portion to first stage precipitation tank by the secondary low temperature of step C1, controls silica in system
Interior cycles of concentration.
The processing equipment for recycling of inorganic salts in a kind of industrial wastewater characterized by comprising
First stage precipitation tank, the colloidal silicon for being precipitated in raw water, recycles the silica of precipitation after filtering for the first time；
Level-one low-temperature evaporation concentration device, connect with first stage precipitation tank, is precipitated after the solvable silicon in raw water is concentrated into supersaturation；
Second level low-temperature evaporation concentration device is connect with level-one low-temperature evaporation concentration device, the silica in stoste is continued dense
It is reduced to supersaturated precipitation；
Concentrate tapping equipment is connect with second level low-temperature evaporation concentration device, and concentrate discharge in place will be concentrated.
Further, connecting pipe is equipped among the second level low-temperature evaporation concentration device and concentrate tapping equipment；Institute
The end for stating connecting pipe is connect with the first stage precipitation tank.
In actual operation, waste water is filtered out into the colloidal silicon in solution by first stage precipitation tank, the clear liquid of filtering again into
Enter to level-one low-temperature evaporation concentration device, be precipitated after dissolved silicon in solution is concentrated into supersaturation, after after second level filters pressing,
Recycle the colloidal silicon that is largely precipitated, after be back to production line, using second level low-temperature evaporation concentration device, control silica
The cycles of concentration in system controls the eduction rate of silica, and refluxing portion mother liquor to first stage precipitation tank filters, so just can be complete
Silica in portion's recovery system is back to production line, and the silica purity recycled is high, is not added with any medicament,
The silica of recycling can be entirely used for production line.
Detailed description of the invention
Fig. 1 is the recycling processing method of inorganic salts and the process flow chart of device in a kind of industrial wastewater of the present invention.
Specific embodiment
Technical solution of the present invention will be clearly and completely described below.
To solve the above problems, the present invention provides the recycling processing methods and dress of inorganic salts in a kind of industrial wastewater
It sets.
As shown in Figure 1, to realize the technical purpose, the technical scheme is that inorganic salts in a kind of industrial wastewater
Recycling processing method, which comprises the following steps:
S1: raw water is imported in first stage precipitation tank, and then carries out preliminary sedimentation, precipitates recovery section silica；
S2: by the preliminary sedimentation of step S1, the remaining clear liquid obtained after preliminary sedimentation is circulated to the concentration of level-one low-temperature evaporation
In device, to be precipitated after the solvable silicon in it is concentrated into supersaturation；
S3: by the processing of step S2, the concentrated clear liquid of preliminary low temperature being circulated in second level low-temperature evaporation concentration device, after
It is continuous to be concentrated into supersaturation analysis silica；
S4: by the concentration again of step S3, the concentrate after secondary concentration being transferred out, and knot is evaporated in electrical secondary system
It is brilliant.
The invention has the advantages that equipment scaling can be prevented using low-temperature evaporation crystallization processes；Change traditional chemical to remove
Silicon technology is whole physics silicon removing process, to reduce dosing cost, improves the concentration of recovery of silica, and shorten technique stream
Journey, investment is few, and recycling degree is big, does not generate secondary pollution, the silica of precipitation can complete-reclaiming in production line, then
Secondary reduction job costs.
In a preferred embodiment of the invention, on the basis of foregoing teachings, further include in the step S1
Following steps:
A1: waste water is imported into first stage precipitation tank, is rested in first stage precipitation tank, is filtered by devices such as filter layers useless
Colloidal silicon in water；
A2: by the standing effect in step A1, the colloidal silicon being deposited in first stage precipitation tank is filtered precipitation, from level-one
Discharge in sedimentation basin.
Further, further comprising the steps of in the step S2:
B1: the remaining clear liquid after preliminary sedimentation flows into level-one low-temperature evaporation concentration device, controls to adjust the temperature in enrichment facility
Degree, to control the cycles of concentration of silica；
B2: being precipitated by the concentration in step B1, then the silica being precipitated is filtered discharge by filtering.
Further, further comprising the steps of in the step S3:
C1: the clear liquid after level-one low-temperature evaporation concentration device passes through control again by second level low-temperature evaporation concentration device
The temperature that system is adjusted in enrichment facility carries out precipitation silica to control the cycles of concentration of silica again；
C2: being precipitated by the concentration in step C1, then the silica being precipitated is filtered discharge by filtering；
C3: being concentrated, concentrate refluxing portion to first stage precipitation tank by the secondary low temperature of step C1, controls silica in system
Interior cycles of concentration.
In actual operation, siliceous raw water first passes around first stage precipitation tank, the colloidal silicon in raw water is precipitated, by first mistake
The silica of precipitation is recycled after filter；Filtered clear liquid passes through level-one low-temperature evaporation concentration device, by the solvable silicon in system
It is precipitated after being concentrated into supersaturation；By the concentrate of level-one low-temperature evaporation concentration device after secondary filter, recycling concentration analysis
Silica out；After clear liquid after by-pass filtration is using second level low-temperature evaporation concentration device, second level low-temperature evaporation concentration dress
The silica in system is set to continue to be concentrated into supersaturated precipitation.By concentrate refluxing portion to first stage precipitation tank, dioxy is controlled
Cycles of concentration of the SiClx in system.Raw water can in level two evaporative crystallization.
The processing equipment for recycling of inorganic salts in a kind of industrial wastewater characterized by comprising
First stage precipitation tank, the colloidal silicon for being precipitated in raw water, recycles the silica of precipitation after filtering for the first time；
Level-one low-temperature evaporation concentration device, connect with first stage precipitation tank, is precipitated after the solvable silicon in raw water is concentrated into supersaturation；
Second level low-temperature evaporation concentration device is connect with level-one low-temperature evaporation concentration device, the silica in stoste is continued dense
It is reduced to supersaturated precipitation；
Concentrate tapping equipment is connect with second level low-temperature evaporation concentration device, and concentrate discharge in place will be concentrated.
Further, connecting pipe is equipped among the second level low-temperature evaporation concentration device and concentrate tapping equipment；Institute
The end for stating connecting pipe is connect with the first stage precipitation tank.
In actual operation, waste water is filtered out into the colloidal silicon in solution by first stage precipitation tank, the clear liquid of filtering again into
Enter to level-one low-temperature evaporation concentration device, be precipitated after dissolved silicon in solution is concentrated into supersaturation, after after second level filters pressing,
Recycle the colloidal silicon that is largely precipitated, after be back to production line, using second level low-temperature evaporation concentration device, control silica
The cycles of concentration in system controls the eduction rate of silica, and refluxing portion mother liquor to first stage precipitation tank filters, so just can be complete
Silica in portion's recovery system is back to production line, and the silica purity recycled is high, is not added with any medicament,
The silica of recycling can be entirely used for production line.
For those of ordinary skill in the art, without departing from the concept of the premise of the invention, it can also do
Several modifications and improvements out, these are all within the scope of protection of the present invention.
Claims (6)
1. the recycling processing method of inorganic salts in a kind of industrial wastewater, which comprises the following steps:
S1: raw water is imported in first stage precipitation tank, and then carries out preliminary sedimentation, precipitates recovery section silica；
S2: by the preliminary sedimentation of step S1, the remaining clear liquid obtained after preliminary sedimentation is circulated to the concentration of level-one low-temperature evaporation
In device, to be precipitated after the solvable silicon in it is concentrated into supersaturation；
S3: by the processing of step S2, the concentrated clear liquid of preliminary low temperature being circulated in second level low-temperature evaporation concentration device, after
It is continuous to be concentrated into supersaturation analysis silica；
S4: by the concentration again of step S3, the concentrate after secondary concentration being transferred out, and knot is evaporated in electrical secondary system
It is brilliant.
2. the recycling processing method of inorganic salts in industrial wastewater according to claim 1, which is characterized in that the step
It is further comprising the steps of in S1:
A1: waste water is imported into first stage precipitation tank, is rested in first stage precipitation tank, is filtered by devices such as filter layers useless
Colloidal silicon in water；
A2: by the standing effect in step A1, the colloidal silicon being deposited in first stage precipitation tank is filtered precipitation, from level-one
Discharge in sedimentation basin.
3. the recycling processing method of inorganic salts in industrial wastewater according to claim 1, which is characterized in that the step
It is further comprising the steps of in S2:
B1: the remaining clear liquid after preliminary sedimentation flows into level-one low-temperature evaporation concentration device, controls to adjust the temperature in enrichment facility
Degree, to control the cycles of concentration of silica；
B2: being precipitated by the concentration in step B1, then the silica being precipitated is filtered discharge by filtering.
4. the recycling processing method of inorganic salts in industrial wastewater according to claim 2, which is characterized in that the step
It is further comprising the steps of in S3:
C1: the clear liquid after level-one low-temperature evaporation concentration device passes through control again by second level low-temperature evaporation concentration device
The temperature that system is adjusted in enrichment facility carries out precipitation silica to control the cycles of concentration of silica again；
C2: being precipitated by the concentration in step C1, then the silica being precipitated is filtered discharge by filtering；
C3: being concentrated, concentrate refluxing portion to first stage precipitation tank by the secondary low temperature of step C1, controls silica in system
Interior cycles of concentration.
5. the processing equipment for recycling of inorganic salts in a kind of industrial wastewater characterized by comprising
First stage precipitation tank, connects original water inlet, and the colloidal silicon for being precipitated in raw water recycles the two of precipitation after filtering for the first time
Silica；
Level-one low-temperature evaporation concentration device, connect with first stage precipitation tank, is precipitated after the solvable silicon in raw water is concentrated into supersaturation；
Second level low-temperature evaporation concentration device is connect with level-one low-temperature evaporation concentration device, the silica in stoste is continued dense
It is reduced to supersaturated precipitation；
Concentrate tapping equipment is connect with second level low-temperature evaporation concentration device, and concentrate discharge in place will be concentrated.
6. the processing equipment for recycling of inorganic salts in industrial wastewater according to claim 5, it is characterised in that: the second level
Connecting pipe is equipped among low-temperature evaporation concentration device and concentrate tapping equipment；The end of the connecting pipe and the level-one
Sedimentation basin connection.
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| CN201910519486.2A CN110272159A (en) | 2019-06-17 | 2019-06-17 | The recycling processing method and device of inorganic salts in a kind of industrial wastewater |
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| CN201910519486.2A CN110272159A (en) | 2019-06-17 | 2019-06-17 | The recycling processing method and device of inorganic salts in a kind of industrial wastewater |
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Citations (7)
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|---|---|---|---|---|
| CN1068602A (en) * | 1991-05-13 | 1993-02-03 | 安德里茨-专利管理有限公司 | Micro-filtration |
| WO1998010851A1 (en) * | 1996-09-11 | 1998-03-19 | Ipec Clean, Inc. | Separation and purification of fluoride from industrial waste |
| CN102674254A (en) * | 2011-03-03 | 2012-09-19 | 精工爱普生株式会社 | Separation method and separation device |
| CN103813987A (en) * | 2011-09-21 | 2014-05-21 | 奥斯特拉营养康复技术有限公司 | Treatment of phosphate-containing wastewater with fluorosilicate and phosphate recovery |
| US8899326B2 (en) * | 2011-07-19 | 2014-12-02 | Cleaver-Brooks, Inc. | Oil recovery process |
| JP2015223538A (en) * | 2014-05-26 | 2015-12-14 | 三菱重工業株式会社 | Water treatment apparatus, and water treatment method |
| CN105800820A (en) * | 2014-12-31 | 2016-07-27 | 北京清大国华环境股份有限公司 | Treatment method and device for silicon containing wastewater |
-
2019
- 2019-06-17 CN CN201910519486.2A patent/CN110272159A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068602A (en) * | 1991-05-13 | 1993-02-03 | 安德里茨-专利管理有限公司 | Micro-filtration |
| WO1998010851A1 (en) * | 1996-09-11 | 1998-03-19 | Ipec Clean, Inc. | Separation and purification of fluoride from industrial waste |
| CN102674254A (en) * | 2011-03-03 | 2012-09-19 | 精工爱普生株式会社 | Separation method and separation device |
| US8899326B2 (en) * | 2011-07-19 | 2014-12-02 | Cleaver-Brooks, Inc. | Oil recovery process |
| CN103813987A (en) * | 2011-09-21 | 2014-05-21 | 奥斯特拉营养康复技术有限公司 | Treatment of phosphate-containing wastewater with fluorosilicate and phosphate recovery |
| JP2015223538A (en) * | 2014-05-26 | 2015-12-14 | 三菱重工業株式会社 | Water treatment apparatus, and water treatment method |
| CN105800820A (en) * | 2014-12-31 | 2016-07-27 | 北京清大国华环境股份有限公司 | Treatment method and device for silicon containing wastewater |
Non-Patent Citations (1)
| Title |
|---|
| 于永辉等: "稠油污水低温多效蒸发深度处理回用热采锅炉中试研究", 《水处理技术》 * |
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