CN109824198A - A kind of oil-containing high-salt wastewater processing system and technique - Google Patents
A kind of oil-containing high-salt wastewater processing system and technique Download PDFInfo
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- CN109824198A CN109824198A CN201910191152.7A CN201910191152A CN109824198A CN 109824198 A CN109824198 A CN 109824198A CN 201910191152 A CN201910191152 A CN 201910191152A CN 109824198 A CN109824198 A CN 109824198A
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- separator
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Abstract
The invention discloses a kind of oil-containing high-salt wastewater processing system and technique, this kind of oil-containing high-salt wastewater processing system and technique, its step are as follows: (1) waste water that pH is adjusted in pond is pumped into raw water slot；(2) waste water passes sequentially through condensation water preheater, vapor preheater and separator；(3) enter heater after the secondary steam temperature and pressure increase that separator generates, the waste water after heating enters separator and evaporates again；(4) occurs salt crystalline substance in separator；(5) salt crystalline substance mixture drains into stiff kettle and carries out crystallisation by cooling, and the salt crystalline substance of generation is transported to incinerating and treating device, and the mother liquor of generation enters mother liquor tank；(6) 96% mother liquor blowback separator in mother liquor tank, 4% mother liquor are discharged into oil separator；(7) mother liquor for being discharged into oil separator stands oil removal in oil separator, and the salt crystalline substance of the oil and discharge that scrape is transported to incinerating and treating device.By the above-mentioned means, present invention process is at low cost, and it is easy to operate, the oily matter in raw water can be removed.
Description
Technical field
The present invention relates to industrial waste water treatments, more particularly to a kind of oil-containing high-salt wastewater processing system and work
Skill.
Background technique
Wastewater treatment substantially follows a usual process, sub-prime pretreatment+secondary biochemical treatment, simple oil-containing at present
Front end dual treatment can be carried out with high-salt wastewater, simple process and is achieved noticeable achievement, but the waste water that the production of pesticide precursor generates
Not only oil-containing but also higher salinity had been contained, common oil removing and desalinating process are difficult to handle such waste water well, and oils and salt
Microbial activity can be affected greatly into biochemical system by dividing.
The presence of oily substance will lead to the poor efficiency of evaporative desalination system, not only increase the consumption of steam or electric energy, but also meeting
Because wastewater treatment influences production link not in time, and it is completely ineffective for the oil removing of raw water pretreatment measure, it is based on disadvantages described above
And deficiency, it is necessary to existing technology be improved, a kind of oil-containing high-salt wastewater processing system and technique are designed.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of oil-containing high-salt wastewater processing system and technique, process costs
It is low, it is easy to operate, the oily matter in raw water can be removed, transparency significantly improves, and mother liquor is made to can continue to enter system steaming
It sends out and smaller to systematic influence, substantially reduces system outlet mother liquor amount.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: it provides at a kind of oil-containing high-salt wastewater
Reason system, this kind of oil-containing high-salt wastewater processing system include that pass sequentially through the connected PH conditioning tank of pipeline, raw water slot, condensed water pre-
Hot device, vapor preheater, heater, separator, stiff kettle, centrifuge, mother liquor tank, oil separator, reaction cavitation air flotation pond are gentle
Pond is rushed, buffer pool is connect by pipeline with PH conditioning tank, and the vapor preheater and heater pass through pipeline and be connected to condensation
Water preheater, mother liquor tank are connected to separator by pipeline, separator also pass through pipeline and gas-liquid separator, centrifugal compressor and
Heater forming circuit, the docking of centrifuge extension end are provided with incinerating and treating device, and oil separator is scraped with reaction cavitation air flotation pond
Slag machine is docked with incinerating and treating device.
Preferably, equipped with check-valves, back-water valve (BWV) and pneumatic on the raw water slot to the pipeline between condensation water preheater
Regulating valve.
Preferably, this kind of oil-containing high-salt wastewater processing system further includes leakage collecting pit, the raw water slot, steam preheating
Device and mother liquor tank pass through output channel and are connected to leakage collecting pit, are equipped with switch valve on output channel.
A kind of oil-containing high-salt wastewater treatment process, its step are as follows:
(1) oil-containing high-salt wastewater is pumped into pH adjustment pond, adds 30% sulfuric acid H2SO4, will under the action of blender
PH is adjusted to 6.5~8, and the waste water adjusted is pumped into raw water slot with delivery pump and does processing in next step；
(2) waste water in raw water slot is after raw water pump promotion passes sequentially through condensation water preheater, vapor preheater in temperature
Rise to 85 DEG C, subsequently into heater, temperature is 105 DEG C, then enter separator, separator vacuum degree -0.023~-
0.03MPa, liquid temperature is at 97~100 DEG C, and at 85~90 DEG C, waste water is evaporated vapor phase temperature in the separator；
(3) secondary steam that separator generates in step (2) enters centrifugal compressor through gas-liquid separator, and secondary steam refers to
Number are as follows: -0.025MPa, 87 DEG C, the temperature and pressure of the compressed secondary steam of centrifugal compressor increases to 0.04Mpa and 110 DEG C,
Subsequently into heater, (96 DEG C) of waste water after heating enter separator and evaporate again, and separator water level declines after evaporation, passes through
Differential pressure transmitter outputs signal to pneumatic control valve, adjusts its aperture, to maintain level stability；
(4) step (2) and step (3) process are repeated, and the salt content in waste water is higher and higher, occurs salt in separator
Crystalline substance, salt crystalline substance are deposited in the salt leg of separator, are blocked up by the circulation of discharging pump repeatedly with preventing the salt crystalline substance in salt leg from accumulating to generate
Plug；
(5) the salt crystalline substance mixture that step (4) generates drains into stiff kettle through discharging pump and outlet valve and carries out crystallisation by cooling, cooling
To 55 DEG C, then by baiting valve discharge to centrifugal dehydration, the salt crystalline substance of generation is transported to incinerating and treating device after being collected with jumbo bag
Do further drying and other treatment；The mother liquor of generation enters mother liquor tank；
(6) 96% mother liquor in mother liquor tank pumps blowback separator by mother liquor, comes back to vapo(u)rization system, 4% mother liquor
It is discharged into oil separator；
(7) mother liquor that oil separator is discharged into step (6) stands oil removal in oil separator, and oily substance swims in upper layer, leads to
It crosses steel band type Oil scraper to strike off, because the salt crystalline substance being further precipitated that temperature reduces is deposited on bottom of pond, be discharged by bottom blow-down valve,
The salt crystalline substance of the oil and discharge that scrape is transported to incinerating and treating device, and the water at middle part enters reaction cavitation air flotation pond through diversion pipe；
(8) waste water is in the reaction zone in reaction cavitation air flotation pond and the H of addition2SO4, PAC, PAM carry out pH adjustment and demulsification is anti-
It answering, pH is adjusted to 1.0~2.2, then enters cavitation air flotation pond and carries out water-oil separating, and the oil slick on upper layer strikes off through Slag Scraping Device, under
The waste water of layer enters buffer pool by overflow, and after through mother liquor delivery pump general, treated that mother liquor is pumped into pH conditioning tank, with raw water
This system is entered back into together.
Compared with prior art, the beneficial effects of the present invention are:
Process costs are low, easy to operate；
The oily matter in raw water can be removed, mother solution C OD is down to 63000mg/L from 650000mg/L, and transparency is significant
Improve, make mother liquor can continue to enter system evaporation and it is smaller to systematic influence, substantially reduce system outlet mother liquor amount.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of oil-containing high-salt wastewater processing system.
Fig. 2 is a kind of oil-containing high-salt wastewater processing technological flow figure.
Specific embodiment
Present pre-ferred embodiments are described in detail with reference to the accompanying drawing, so as to can be easier to the advantages of invention with feature
In being readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Fig. 1 and Fig. 2 are please referred to, the embodiment of the present invention includes:
A kind of oil-containing high-salt wastewater processing system, this kind of oil-containing high-salt wastewater processing system include passing sequentially through pipeline to be connected
PH conditioning tank 1, raw water slot 2, condensation water preheater 3, vapor preheater 4, heater 5, separator 6, stiff kettle 9, centrifuge
10, mother liquor tank 11, oil separator 12, reaction cavitation air flotation pond 13 and buffer pool 14, buffer pool 14 are connected by pipeline and PH conditioning tank 1
It connects, the vapor preheater 4 and heater 5 are connected to condensation water preheater 3 by pipeline, and mother liquor tank 11 is connected by pipeline
To separator 6, separator 6 is also formed into a loop by pipeline and gas-liquid separator 7, centrifugal compressor 8 and heater 5, centrifuge
The docking of 10 extension ends is provided with incinerating and treating device 15, oil separator 12 and the Slag Scraping Device and burning disposal for reacting cavitation air flotation pond 13
Device 15 docks.
Check-valves, back-water valve (BWV) and pneumatic control valve are housed on the raw water slot 2 to the pipeline between condensation water preheater 3.
This kind of oil-containing high-salt wastewater processing system further includes leakage collecting pit 16, the raw water slot 2,4 and of vapor preheater
Mother liquor tank 11 is connected to leakage collecting pit 16 by output channel, is equipped with switch valve on output channel.
A kind of oil-containing high-salt wastewater treatment process, its step are as follows:
(1) oil-containing high-salt wastewater is pumped into pH adjustment pond 1, adds 30% sulfuric acid H2SO4, under the action of blender
PH is adjusted to 6.5~8, the waste water adjusted is pumped into raw water slot 2 with delivery pump and does processing in next step；
(2) temperature after raw water pump promotion passes sequentially through condensation water preheater 3, vapor preheater 4 of the waste water in raw water slot 2
85 DEG C are risen to, subsequently into heater 5, temperature is 105 DEG C, then enters separator 6,6 vacuum degree of separator is -0.023
~-0.03MPa, liquid temperature is at 97~100 DEG C, and at 85~90 DEG C, waste water is evaporated vapor phase temperature in separator 6；
(3) secondary steam that separator 6 generates in step (2) enters centrifugal compressor 8, secondary steaming through gas-liquid separator 7
Vapour index are as follows: -0.025MPa, 87 DEG C, the temperature and pressure of the compressed secondary steam of centrifugal compressor 8 increases to
0.04Mpa and 110 DEG C, subsequently into heater 5, (96 DEG C) of waste water after heating enter separator 6 and evaporate again,
6 water level decreasing of separator after evaporation, outputs signal to pneumatic control valve by differential pressure transmitter, its aperture is adjusted, with maintaining liquid
Stablize position；
(4) step (2) and step (3) process are repeated, and the salt content in waste water is higher and higher, occurs in separator 5
Salt is brilliant, and salt crystalline substance is deposited in the salt leg of separator 6, is generated by the circulation of discharging pump repeatedly with preventing the salt crystalline substance in salt leg from accumulating
Blocking；
(5) the salt crystalline substance mixture that step (4) generates drains into stiff kettle 9 through discharging pump and outlet valve and carries out crystallisation by cooling, cold
But to 55 DEG C, then by baiting valve discharge to 10 dehydration of centrifugation, the salt crystalline substance of generation is transported to burning disposal after being collected with jumbo bag
Device does further drying and other treatment；The mother liquor of generation enters mother liquor tank 11；
(6) 96% mother liquor in mother liquor tank 11 pumps blowback separator 6 by mother liquor, comes back to vapo(u)rization system, 4% mother
Liquid is discharged into oil separator 12；
(7) mother liquor that oil separator 12 is discharged into step (6) stands oil removal in oil separator 12, and oily substance is swum in
Layer, is struck off by steel band type Oil scraper, because the salt crystalline substance being further precipitated that temperature reduces is deposited on bottom of pond, passes through bottom blow-down valve
The salt crystalline substance of discharge, the oil and discharge that scrape is transported to incinerating and treating device, and the water at middle part enters reaction cavitation air flotation through diversion pipe
Pond 13；
(8) waste water is in the reaction zone in reaction cavitation air flotation pond 13 and the H of addition2SO4, PAC, PAM carry out pH adjustment and demulsification
Reaction, pH are adjusted to 1.0~2.2, then enter cavitation air flotation pond 13 and carry out water-oil separating, the oil slick on upper layer is scraped through Slag Scraping Device
Remove, the waste water of lower layer enters buffer pool 14 by overflow, and after through mother liquor delivery pump will treated that mother liquor is pumped into pH conditioning tank
1, this system is entered back into together with raw water.
Following table one is the main water quality parameter of Inlet and outlet water:
The main water quality parameter of 1 Inlet and outlet water of table
| Project | pH | CODcr(mg/L) | Petroleum-type | Conductivity (uS/cm) |
| Water inlet | 8~12 | 0~87000 | 0~1% | 50000 |
| Water outlet | 6~8 | 0~2600 | <1mg/L | 420~630 |
A kind of oil-containing high-salt wastewater processing system of the present invention and technique, process costs are low, easy to operate；Raw water can be removed
In oily matter, mother solution C OD is down to 63000mg/L from 650000mg/L, and transparency significantly improves, make mother liquor can continue into
Enter system evaporation and it is smaller to systematic influence, substantially reduce system outlet mother liquor amount.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (4)
1. a kind of oil-containing high-salt wastewater processing system, it is characterised in that: this kind of oil-containing high-salt wastewater processing system includes successively leading to
The connected PH conditioning tank of piping, raw water slot, condensation water preheater, vapor preheater, heater, separator, stiff kettle, centrifugation
Machine, mother liquor tank, oil separator, reaction cavitation air flotation pond and buffer pool, buffer pool are connect by pipeline with PH conditioning tank, the steam
Preheater and heater pass through pipeline and are connected to condensation water preheater, and mother liquor tank is connected to separator, separator by pipeline
It is also formed into a loop by pipeline and gas-liquid separator, centrifugal compressor and heater, the docking of centrifuge extension end is provided with burning
Processing unit, oil separator and the Slag Scraping Device for reacting cavitation air flotation pond are docked with incinerating and treating device.
2. a kind of oil-containing high-salt wastewater processing system according to claim 1, it is characterised in that: the raw water slot to condensation
Check-valves, back-water valve (BWV) and pneumatic control valve are housed on the pipeline between water preheater.
3. a kind of oil-containing high-salt wastewater processing system according to claim 1, it is characterised in that: further include that leakage is collected
Pond, the raw water slot, vapor preheater and mother liquor tank pass through output channel and are connected to leakage collecting pit, install on output channel
There is switch valve.
4. a kind of oil-containing high-salt wastewater treatment process, its step are as follows:
(1) oil-containing high-salt wastewater is pumped into pH adjustment pond, adds 30% sulfuric acid H2SO4, by pH tune under the action of blender
It is whole to 6.5~8, the waste water adjusted, which with delivery pump is pumped into raw water slot, to be done and handles in next step；
(2) temperature after raw water pump promotion passes sequentially through condensation water preheater, vapor preheater of the waste water in raw water slot rises to
85 DEG C, subsequently into heater, temperature is 105 DEG C, then enters separator, separator vacuum degree -0.023~-
0.03MPa, liquid temperature is at 97~100 DEG C, and at 85~90 DEG C, waste water is evaporated vapor phase temperature in the separator；
(3) secondary steam that separator generates in step (2) enters centrifugal compressor, secondary steam index through gas-liquid separator
Are as follows: -0.025MPa, 87 DEG C, the temperature and pressure of the compressed secondary steam of centrifugal compressor increases to 0.04Mpa and 110 DEG C, so
Enter heater afterwards, (96 DEG C) of waste water after heating enter separator and evaporate again, and separator water level declines after evaporation, pass through difference
Pressure transmitter outputs signal to pneumatic control valve, adjusts its aperture, to maintain level stability；
(4) step (2) and step (3) process are repeated, and the salt content in waste water is higher and higher, occur salt crystalline substance in separator,
Salt crystalline substance is deposited in the salt leg of separator, generates blocking by the circulation of discharging pump repeatedly to prevent the salt crystalline substance in salt leg from accumulating；
(5) the salt crystalline substance mixture that step (4) generates drains into stiff kettle through discharging pump and outlet valve and carries out crystallisation by cooling, is cooled to 55
DEG C, then by baiting valve discharge to centrifugal dehydration, the salt crystalline substance of generation be transported to after being collected with jumbo bag incinerating and treating device do into
The drying and other treatment of one step；The mother liquor of generation enters mother liquor tank；
(6) 96% mother liquor in mother liquor tank pumps blowback separator by mother liquor, comes back to vapo(u)rization system, 4% mother liquor is discharged into
Oil separator；
(7) mother liquor that oil separator is discharged into step (6) stands oil removal in oil separator, and oily substance swims in upper layer, passes through steel
Draper-type oil scraper is struck off, and because the salt crystalline substance being further precipitated that temperature reduces is deposited on bottom of pond, is discharged, is scraped by bottom blow-down valve
Oil and the salt crystalline substance of discharge be transported to incinerating and treating device, the water at middle part enters reaction cavitation air flotation pond through diversion pipe；
(8) waste water is in the reaction zone in reaction cavitation air flotation pond and the H of addition2SO4, PAC, PAM carry out pH adjustment and demulsification reaction,
PH is adjusted to 1.0~2.2, then enters cavitation air flotation pond and carries out water-oil separating, the oil slick on upper layer strikes off through Slag Scraping Device, lower layer
Waste water enters buffer pool by overflow, and after through mother liquor delivery pump will treated that mother liquor is pumped into pH conditioning tank, together with raw water
Enter back into this system.
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| CN201910191152.7A CN109824198A (en) | 2019-03-13 | 2019-03-13 | A kind of oil-containing high-salt wastewater processing system and technique |
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| CN201910191152.7A CN109824198A (en) | 2019-03-13 | 2019-03-13 | A kind of oil-containing high-salt wastewater processing system and technique |
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| CN108439685A (en) * | 2018-04-14 | 2018-08-24 | 上海中腾环保科技有限公司 | A kind of sinker waste water treatment system and its processing method based on MVR evaporative crystallizations |
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| CN208362101U (en) * | 2018-05-29 | 2019-01-11 | 苏州鼎昌节能环保科技有限公司 | A kind of electroplating wastewater MVR evaporated crystallization device |
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2019
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203428934U (en) * | 2013-07-24 | 2014-02-12 | 深圳市捷晶能源科技有限公司 | Concentrating and crystallizing system of copper sulfate solution |
| CN105152386A (en) * | 2015-05-18 | 2015-12-16 | 宣城得奇环保科技有限公司 | Mixed sewage treatment technology |
| CN105731707A (en) * | 2016-02-22 | 2016-07-06 | 溧阳德维透平机械有限公司 | MVR processing unit and method for wastewater containing oil and salt |
| CN107512814A (en) * | 2017-09-13 | 2017-12-26 | 重庆瀚渝再生资源有限公司 | Emulsify liquor treating process |
| CN207811478U (en) * | 2017-12-04 | 2018-09-04 | 北京沃特普特环境科技有限公司 | A kind of gas field wastewater desulfurization desalting processing system containing surfactant |
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