CN208949058U - A kind of coal gasification phenol wastewater ammonia still process extraction multiple treating system - Google Patents
A kind of coal gasification phenol wastewater ammonia still process extraction multiple treating system Download PDFInfo
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- CN208949058U CN208949058U CN201821240204.2U CN201821240204U CN208949058U CN 208949058 U CN208949058 U CN 208949058U CN 201821240204 U CN201821240204 U CN 201821240204U CN 208949058 U CN208949058 U CN 208949058U
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Abstract
The utility model discloses a kind of coal gasification phenol wastewater ammonia still processs to extract multiple treating system, includes pH adjustment system, ammonia steaming system and extracting system.The utility model is according to coal gas phenol wastewater characteristic, and using complex techniques such as pH adjusting, ammonia still process, extractions, reaching reduces volatile phenol, ammonia nitrogen and other ingredients in phenol wastewater, meets biochemical inflow requirement, while recycling ammonium hydroxide and sodium phenolate, avoids environmental pollution.
Description
Technical field
The utility model relates to field of waste water treatment, specifically a kind of coal gasification phenol wastewater ammonia still process extracts combined processing system
System.
Background technique
China is a rich coal resources, the few country of oil and natural gas reserves, to coal in energy consumption structure
Dependence is big, and in order to promote energy resource structure reasonable, clean coal technology is promoted in exploitation, develops coal gasification, coal chemical industry.Coal Gasification skill
Art can be widely applied to the rows such as ceramics, chemical industry, glass, oxidation aluminium magnesia production, solid caustic soda, metallurgy, refractory material, casting forging
Industry.Especially in the application of architectural pottery, glass, aluminium oxide, magnesia industry, reducing cost is very significantly, to use coal
Gasification, which generates coal gas as fuel, can make fuel cost reduce by 50% or more.
In coal gasification production process, since the process such as cooling, washing, purification generate a large amount of phenol wastewater.Its water quality
Constituent is complicated, and main component has volatile phenol, tar, cyanide and benzene compounds, ammonia nitrogen etc., belongs to pollutant concentration
Height, complicated component, it is difficult to one of industrial wastewater of improvement, it is serious to restrict Coal Gasification Technology development, to coal gasification phenol wastewater
Processing, the method by physics, physical chemistry, chemistry is handled merely, it is difficult to reach discharge standard, there is an urgent need to a kind of advanced
Technique, low cost are administered, processed waste water qualified discharge.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of coal gasification phenol wastewater ammonia still processs to extract combined processing system
It is useless containing phenol to reach reduction using complex techniques such as pH adjusting, ammonia still process, extraction, back extraction according to coal gas phenol wastewater characteristic for system
Volatile phenol, ammonia nitrogen and other ingredients, meet biochemical inflow requirement in water, while recycling ammonium hydroxide and sodium phenolate, avoid environment
Pollution.
The technical solution of the utility model are as follows:
A kind of coal gasification phenol wastewater ammonia still process extraction multiple treating system includes pH adjustment system, ammonia steaming system and extraction
Take system；
The pH adjustment system includes alkali liquor storage tank and dosing pump；
The ammonia steaming system includes level-one preheater, second level preheater, tower bottom cooler, ammonia still, condenser, returns
Flow tank and tank used for storing ammonia；The alkali liquor storage tank is connected to by dosing pump with the dosing mouth of level-one preheater, level-one preheater
The inlet communication of outlet and second level preheater, the outlet of second level preheater and the inlet communication of ammonia still, ammonia still tower bottom are given up
Water out is connect by tower bottom rear pump with the pre- hydrothermal solution import of level-one preheater, the pre- hydrothermal solution outlet of level-one preheater and tower bottom
The import of cooler connects, the inlet communication of the ammonia nitrogen outlet and condenser of the ammonia still process column overhead, the outlet of condenser with
The inlet communication of return tank, reflux import, tank used for storing ammonia at the top of ammonia still pass through the outlet of reflux pump and return tank；
The extracting system includes intermediate pool, extraction tower, extractant circulatory pool and extractant transition pond, described
The outlet of tower bottom cooler is connected to intermediate pool, and the tower top of the extraction tower is provided with waste water inlet and extractant outlet,
The tower bottom of extraction tower is provided with wastewater outlet and extractant import, and the waste water inlet of extraction tower passes through wastewater feed pump and intermediate water
The extractant import of pond connection, extraction tower is connected to by extractant transition pump with extractant transition pond, and the extractant of extraction tower goes out
Mouth is connected to extractant circulatory pool.
The condenser includes first-stage condenser and secondary condenser, the import and ammonia still process of the first-stage condenser
The ammonia nitrogen outlet of column overhead, the outlet of first-stage condenser and the inlet communication of secondary condenser, the outlet of secondary condenser
With the inlet communication of return tank.
The ammonia steaming system further includes having scrubbing tower, and the ammonia escape mouth of the return tank, the ammonia of condenser are escaped
Mouth escape with the inlet communication of scrubbing tower, the outlet of scrubbing tower passes through the inlet communication of water-circulating pump and scrubbing tower, and scrubbing tower
Outlet be connected to tank used for storing ammonia.
The coal gasification phenol wastewater ammonia still process extraction multiple treating system further includes having back extraction system, is stripped system
It include back extraction tower and stripping agent circulatory pool, the tower bottom of the back extraction tower is provided with stripping agent outlet and extractant import, instead
The tower top of extraction tower is provided with stripping agent import and extractant outlet, and the extractant import of the back extraction tower is recycled by extractant
Pump is connected to extractant circulatory pool, and the stripping agent import for being stripped tower is connected to by stripping agent circulating pump with stripping agent circulatory pool, instead
The extractant outlet of extraction tower is connected to extractant transition pond, and the stripping agent outlet for being stripped tower is connected to stripping agent circulatory pool.
The advantages of the utility model:
(1), high for coal gasification phenol wastewater ammonia nitrogen, phenol concentration, ammonia nitrogen is taken in 3000mg/L, phenol in 6000mg/L
Ammonia still process extracts complex technique, and guarantee meets biochemical treatment water inlet and requires to ammonia nitrogen, phenol control, while recycling ammonium hydroxide, sodium phenolate；
(2), coal gasification phenol wastewater is separated material by the vapour-liquid exchange of the mass-and heat-transfer of ammonia still column plate,
Ammonia nitrogen in the phenol wastewater of ammonia still tower bottom aggregation drops to 50mg/L, and what ammonia nitrogen was formed in tower top is the stable ammonium hydroxide of component,
By the extraction of the condensing reflux and ammonium hydroxide of condenser, spray-absorption is carried out subsequently into scrubbing tower；
(3), the phenol in the phenol wastewater after ammonia still process is still very high, needs phenol removal, the phenol wastewater after ammonia still process
Enter extraction tower from extraction column overhead, the extractant entered with tower bottom is inversely exchanged, using in extractant absorption waste water
Phenol, while extractant is not soluble in water, from extraction column overhead discharge, the waste water after dephenolize is discharged from tower bottom, reduces Phenol for Waste Water, phenol
Content is in 200mg/L or less；
(4), the saturation extractant of the utility model extraction tower discharge enters back extraction tower, and the extractant after back extraction returns to extraction
Agent circulatory pool re-uses, after stripping agent saturation, as the processing of recovery product sodium phenolate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
See that Fig. 1, a kind of coal gasification phenol wastewater ammonia still process extraction multiple treating system include pH adjustment system, ammonia still process system
System, extracting system and back extraction system；
It includes alkali liquor storage tank 1 and dosing pump 2 that pH, which adjusts system,；
Ammonia steaming system includes level-one preheater 3, second level preheater 4, tower bottom cooler 5, ammonia still 6, first-stage condenser
7, secondary condenser 8, return tank 9, scrubbing tower 10 and tank used for storing ammonia 11；Alkali liquor storage tank 1 passes through dosing pump 2 and level-one preheater 3
Dosing mouth connection, the inlet communication of the outlet of level-one preheater 3 and second level preheater 4, the outlet and ammonia still process of second level preheater 4
The inlet communication of tower 6, the wastewater outlet of 6 tower bottom of ammonia still pass through the pre- hydrothermal solution import of tower bottom rear pump 12 and level-one preheater 4
The pre- hydrothermal solution outlet of connection, level-one preheater 4 is connect with the import of tower bottom cooler 5, the import of first-stage condenser 7 and ammonia still
The ammonia nitrogen outlet of 6 tower tops, the outlet of first-stage condenser 7 and the inlet communication of secondary condenser 8, secondary condenser 8 go out
The inlet communication of mouth and return tank 9, the reflux import at 7 top of ammonia still, tank used for storing ammonia 11 pass through reflux pump 13 and return tank 9
Outlet, the ammonia escape mouth of return tank 9, first-stage condenser 7 and secondary condenser 8 ammonia escape mouth and scrubbing tower
10 inlet communication, the inlet communication of scrubbing tower 10 exported through water-circulating pump 14 and scrubbing tower 10, and scrubbing tower 10 go out
Mouth is connected to tank used for storing ammonia 9；
Extracting system includes intermediate pool 15, extraction tower 16, extractant circulatory pool 17 and extractant transition pond 18, tower bottom
The outlet of cooler 5 is connected to intermediate pool 15, and the tower top of extraction tower 16 is provided with waste water inlet and extractant outlet, extraction tower
16 tower bottom is provided with wastewater outlet and extractant import, and the waste water inlet of extraction tower 16 passes through wastewater feed pump 19 and intermediate water
Pond 15 is connected to, and the extractant import of extraction tower 16 is connected to by extractant transition pump 20 with extractant transition pond 18, extraction tower 16
Extractant outlet be connected to extractant circulatory pool 17；
Back extraction system includes back extraction tower 21 and stripping agent circulatory pool 22, and the tower bottom of back extraction tower 21 is provided with stripping agent and goes out
Mouthful and extractant import, back extraction tower 21 tower top be provided with stripping agent import and extractant outlet, be stripped tower 21 extractant into
Mouth is connected to by extractant circulating pump 23 with extractant circulatory pool 17, and the stripping agent import of back extraction tower 21 passes through stripping agent circulating pump
24 are connected to stripping agent circulatory pool 22, and the extractant outlet of back extraction tower 21 is connected to extractant transition pond 18, are stripped the anti-of tower 21
Extraction agent outlet is connected to stripping agent circulatory pool 22.
A kind of coal gasification phenol wastewater ammonia still process extraction compounding method, has specifically included following steps:
(1), coal gasification phenol wastewater enters level-one preheater 3, at the same the lye in alkali liquor storage tank 1 by dosing pump 2 into
Enter into level-one preheater 3, adjusts the pH value of phenol wastewater to 9-11；
(2), the waste water of 6 tower bottom of ammonia still output is pumped into level-one preheater 3 by tower bottom rear pump 12 and is used as pre- hydrothermal solution
To phenol wastewater carry out level-one preheating, subsequently into second level preheater 4 by hot steam to phenol wastewater carry out second level preheating, two
Phenol wastewater temperature after grade preheater 4 preheats is 85-95 DEG C；
(3), the phenol wastewater after second level preheating enters inside ammonia still 6, the vapour-liquid of the mass-and heat-transfer through 6 column plate of ammonia still
Exchange, phenol wastewater is separated, since the boiling point of ammonia nitrogen is lower, will move separation from bottom to top, is assembled in top of tower, is contained
Phenol waste water is separated with ammonia nitrogen from top to bottom since boiling point is higher, is assembled in tower bottom；
(4), the phenol wastewater after the ammonia still process of 6 tower bottom of ammonia still output is pumped into level-one preheater 3 by tower bottom rear pump 12
As pre- hydrothermal solution, then cool through tower bottom cooler 5, the waste water that temperature is 35-45 DEG C after tower bottom cooler 5 cools
It is discharged into intermediate pool 15；
(5), what the ammonia nitrogen that ammonia still 6 is separated was formed in tower top is the stable ammonium hydroxide of component, and ammonium hydroxide passes sequentially through one
Enter return tank 9 after grade condenser 7, secondary condenser 8 are cold, the ammonium hydroxide in return tank 9 controls reflux ratio by reflux pump 13 and obtains
The ammonium hydroxide stable to quality, partial ammonia water (mass ratio 10%), which enters in tank used for storing ammonia 11, to be stored, remaining ammonium hydroxide is beaten as reflux
Enter 6 overhead reflux of ammonia still；
(6), the ammonia that ammonia, first-stage condenser 7 and the secondary condenser 8 that return tank 9 is escaped are escaped enters scrubbing tower
10, the washing water being discharged after water washing in scrubbing tower 10 reenters in scrubbing tower 10 scrubbing ammonia repeatedly through water-circulating pump 14
Gas absorbs ammonia concentration and reaches a certain concentration, is discharged into the storage of tank used for storing ammonia 11；
(7), the phenol wastewater in intermediate pool 15 promotes tower top and the entrance to extraction tower 16 by extracted feed pump 19
In extraction tower 16, the extractant in extractant transition pond 18 is gone forward side by side by the tower bottom that extractant transition pump 20 is transported to extraction tower 16
Enter in extraction tower 16, phenol wastewater: extractant is inversely extracted by the weight ratio of 1:2, is layered after extraction, upper layer saturation extraction
((phenol content flows into extractant circulatory pool 17, lower layer's exhausted water (phenol content close to 1600ppm)) from 16 tower top of extraction tower to liquid
≤ 200ppm) being flow automatically by tower bottom bottom U-tube enters biochemical treatment；
(8), the saturation extractant in extractant circulatory pool 17 is transported to the tower bottom of back extraction tower by extractant circulating pump 23
And entering back extraction tower 21, the stripping agent in stripping agent circulatory pool 22 is promoted to the tower top of back extraction tower 21 by stripping agent circulating pump 24
And enter back extraction tower 21, be saturated extractant: stripping agent is inversely stripped by the weight ratio of 1:1, the regenerating extracting agent (benzene on upper layer
Phenol content≤50ppm) from back extraction 21 tower top of tower from extractant transition pond 18 is flowed into, return is reused, and lower layer's stripping agent leads to
It crosses the gravity flow of 21 tower bottom of back extraction tower and enters the recycling of stripping agent circulatory pool 22；Wherein, anti-after saturation in stripping agent circulatory pool 22
Extract agent and supplements 32% concentration liquid alkaline as sodium phenolate processing.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (4)
1. a kind of coal gasification phenol wastewater ammonia still process extracts multiple treating system, it is characterised in that: include pH adjustment system, ammonia still process
System and extracting system；
The pH adjustment system includes alkali liquor storage tank and dosing pump；
The ammonia steaming system includes level-one preheater, second level preheater, tower bottom cooler, ammonia still, condenser, return tank
And tank used for storing ammonia；The alkali liquor storage tank is connected to by dosing pump with the dosing mouth of level-one preheater, the outlet of level-one preheater
With the inlet communication of second level preheater, the outlet of second level preheater and the inlet communication of ammonia still, the waste water of ammonia still tower bottom go out
Mouth is connect by tower bottom rear pump with the pre- hydrothermal solution import of level-one preheater, and the pre- hydrothermal solution outlet of level-one preheater and tower bottom are cooling
The import of device connects, the inlet communication of the ammonia nitrogen outlet and condenser of the ammonia still process column overhead, the outlet and reflux of condenser
The inlet communication of tank, reflux import, tank used for storing ammonia at the top of ammonia still pass through the outlet of reflux pump and return tank；
The extracting system includes intermediate pool, extraction tower, extractant circulatory pool and extractant transition pond, the tower bottom
The outlet of cooler is connected to intermediate pool, and the tower top of the extraction tower is provided with waste water inlet and extractant outlet, extraction
The tower bottom of tower is provided with wastewater outlet and extractant import, and the waste water inlet of extraction tower is connected by wastewater feed pump with intermediate pool
Logical, the extractant import of extraction tower be connected to by extractant transition pump with extractant transition pond, the extractant of extraction tower export and
The connection of extractant circulatory pool.
2. a kind of coal gasification phenol wastewater ammonia still process according to claim 1 extracts multiple treating system, it is characterised in that: institute
The condenser stated includes first-stage condenser and secondary condenser, the import of the first-stage condenser and the ammonia of ammonia still process column overhead
Nitrogen outlet, the outlet of first-stage condenser and the inlet communication of secondary condenser, the outlet of secondary condenser and return tank
Inlet communication.
3. a kind of coal gasification phenol wastewater ammonia still process according to claim 1 extracts multiple treating system, it is characterised in that: institute
The ammonia steaming system stated further includes having scrubbing tower, the ammonia of return tank escape mouth, condenser ammonia escape mouth with wash
The inlet communication of tower is washed, the outlet of scrubbing tower passes through the inlet communication of water-circulating pump and scrubbing tower, and outlet and the ammonia of scrubbing tower
Water storage tank connection.
4. a kind of coal gasification phenol wastewater ammonia still process according to claim 1 extracts multiple treating system, it is characterised in that: institute
The coal gasification phenol wastewater ammonia still process extraction multiple treating system stated further includes having back extraction system, and back extraction system includes back extraction
Tower and stripping agent circulatory pool, the tower bottom of the back extraction tower are provided with stripping agent outlet and extractant import, are stripped the tower top of tower
It is provided with stripping agent import and extractant outlet, the extractant import of the back extraction tower passes through extractant circulating pump and extractant
Circulatory pool connection, the stripping agent import for being stripped tower are connected to by stripping agent circulating pump with stripping agent circulatory pool, and the extraction of tower is stripped
Agent outlet is connected to extractant transition pond, and the stripping agent outlet for being stripped tower is connected to stripping agent circulatory pool.
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| CN201821240204.2U CN208949058U (en) | 2018-08-02 | 2018-08-02 | A kind of coal gasification phenol wastewater ammonia still process extraction multiple treating system |
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| CN201821240204.2U CN208949058U (en) | 2018-08-02 | 2018-08-02 | A kind of coal gasification phenol wastewater ammonia still process extraction multiple treating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108862800A (en) * | 2018-08-02 | 2018-11-23 | 合肥中亚环保科技有限公司 | A kind of coal gasification phenol wastewater ammonia still process extraction multiple treating system and its processing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108862800A (en) * | 2018-08-02 | 2018-11-23 | 合肥中亚环保科技有限公司 | A kind of coal gasification phenol wastewater ammonia still process extraction multiple treating system and its processing method |
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Granted publication date: 20190607 Termination date: 20210802 |
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