CN201770558U

CN201770558U - Equipment for deeply treating and recycling coked wastewater

Info

Publication number: CN201770558U
Application number: CN2010201599012U
Authority: CN
Inventors: 赵立功
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-04-15
Filing date: 2010-04-15
Publication date: 2011-03-23
Anticipated expiration: 2020-04-15

Abstract

The utility model discloses equipment for deeply treating and recycling coked wastewater, belonging to the field of wastewater treatment equipment. The equipment consists of an iron carbon micro-electrolysis pond, a coagulation and sedimentation pond, a three-dimensional electrode catalytic reactor, an immersed ultra-filtration system and a reverse osmosis desalinating system, wherein the iron carbon micro-electrolysis pond can remove most of the organic matter which is hard to decompose, the coagulation and sedimentation pond guarantees that the suspended matter is removed by means of the iron carbon micro-electrolysis technology, the iron carbon micro-electrolysis also can be changed to be a coagulation and air flotation pond, the sedimentary discharging water enters into the three-dimensional electrode catalytic reactor, the organic matter and the chromaticity in the wastewater are deeply decompose by the electro-catalysis and oxidation, the electrically-catalyzed and oxidized wastewater enters into the immersed ultra-filtration system to guarantee that the suspended impurity in the wastewater is removed, and the impurity is treated by the reverse osmosis and desalination, so that the discharging water can be used as the circulating cooling water. The equipment is used in the field for recycling the coked wastewater, has the characteristics of being low in operating cost and being stable and reliable in effect, and also can be used in the field for marking and recycling the wastewater which contains the organic matter which is hard to decompose.

Description

The equipment of a kind of coking wastewater deep treatment and reuse

Technical field

The utility model relates to a kind of sewage disposal device, more particularly, is the equipment of a kind of coking wastewater deep treatment and reuse.

Background technology

Coking chemical waste water is the waste water that produces in coal high temperature carbonization, gas purification and Chemicals treating process, main source: the one, and remained ammonia, it is the waste water that generates in the dry distillation of coal and coal gas cooling, is the main source of coking chemical waste water; The 2nd, the waste water that produces in the gas purification process divides dried up etc. as gas final cold water and crude benzol; The 3rd, in treating processes such as tar, crude benzol, reach the waste water that other occasion produces, coking chemical waste water mainly contains phenol, cyanogen, ammonia nitrogen, sulfide and many hardly degraded organic substances, and biodegradability is relatively poor, is a kind of more unmanageable waste water.

Along with the upgrading of the coking industrial structure and the standard of market competition order, National Development and Reform Committee spells out coking chemical waste water in " the coking industry entry criteria " implemented in 2005 will accomplish the internal recycling use after treatment, and wastewater containing phenol and cyanide is handled reuse in the factory of back; And in " coking industry pollution situation and the countermeasure and suggestion " announced in 2006, point out to have discharged in the process of coking hazardous and noxious substances such as a large amount of benzo [a] pyrene (BaP), prussiate, wherein benzo [a] pyrene is a strong carcinogen, serious to health of human body harm, should strengthen administering, therefore improve the coking chemical waste water cyclic utilization rate, reduce wastewater disposition, reduce new water consumption and become one of process for cleanly preparing that present Iron And Steel Industry enterprise extensively adopts, and reusing sewage is the optimal selection that realizes sewage zero-discharge and resource reutilization.

China Patent No. is the fluid bed three-dimensional electrode reactor that is used for treatment of Organic Wastewater of CN101077801, the patent No. is the 3 D electrode reactor of CN1358672 and is used to handle organic waste water, all introduced a kind of 3 D electrode reactor that can increase substantially the electrooxidation effect, pass through electrode, the granule electrode of air aeration and filling, realize the raising of electrooxidation effect, yet above patent about 3 D electrode reactor, all be inclined to the principle introduction, the equipment complexity, the cost of investment height, only tend to laboratory scale, fail to provide the device model that can be applied to project scale.

Summary of the invention

In order to solve deficiency of the prior art, the utility model provides the equipment of a kind of coking wastewater deep treatment and reuse, it can be according to the organic content difference of waste water after the biochemical treatment, and flexible combination technology is to reach the purpose of discharged wastewater met the national standard or advanced treatment and reclamation.This utility model takies more small area, easier project installation and expansion.

The purpose of this utility model is that the technical scheme by following employing realizes:

The equipment of a kind of coking wastewater deep treatment and reuse, comprise coagulative precipitation tank, submerged ultrafiltration system and reverse osmosis desalinization system and iron charcoal micro-electrolysis reactor and three-diemsnional electrode catalyticreactor, the water-in of water outlet of iron charcoal micro-electrolysis reactor and coagulative precipitation tank is connected, be connected with 3 D electrode reactor then, the water outlet of 3 D electrode reactor is connected with follow-up submerged ultrafiltration system, is connected with reverse osmosis desalinization system after the ultrafiltration membrane system.

Coking chemical waste water biochemical treatment water outlet enters iron charcoal micro cell, through fully entering coagulative precipitation tank after the reaction, coagulating sedimentation water outlet water pump delivery is to 3 D electrode reactor, three-dimensional electrode reactor water outlet gravity flow enters the submerged ultrafiltration system, and the ultrafiltration membrane system water outlet is arrived reverse osmosis desalinization system with pump delivery.

The coking wastewater processing system of actual motion in a lot of engineerings, the COD index of water outlet discharging is more than 500mg/l, this waste water pH value is adjusted to about 4, enter iron charcoal micro-electrolysis reactor, reaction times 1h, oxidation operation more than 60% can be fallen, owing to adopted iron charcoal micro-electrolysis stuffing bucket, solved the operating filler of the common little electrolysis problem that hardens, improved system efficiency, and this iron charcoal micro-electrolysis stuffing barrel structure is simple, construction and replacing are all very flexible, in addition in actual motion, can in waste water, add a certain amount of hydrogen peroxide, strengthen iron charcoal micro-electrolysis reactor organic matter removal effect, if coking chemical waste water bio-chemical effluent COD index is less than 300mg/L, can not adopt iron charcoal micro-electrolysis reactor selectively, bio-chemical effluent directly adopts follow-up coagulative precipitation tank.

Described coagulative precipitation tank also can adopt coagulation floatation.

Described iron charcoal micro cell, the little electrolysis water outlet of iron charcoal is adjusted more than the pH value to 7.0, can produce great quantity of floc, and follow-up coagulating sedimentation (air supporting) technology can guarantee that these flcos effectively remove, and guarantees the unlikely obstruction of the normal operation of 3 D electrode reactor.

Described 3 D electrode reactor, primary structure comprises: box three-diemsnional electrode, high resistance particulate material, aerating system, wherein the arrangement form of cathode-anode plate adopts modular arrangement, be easy to project installation and expansion, the power supply juncture of unique design guarantees security of system steady running simultaneously, 3 D electrode reactor decomposes hardly degraded organic substance in the waste water in very short time, organic matter removal efficient can reach more than 60%, and power consumption can be stabilized in below the 1kwh/ ton water.

Described submerged ultrafiltration system, adopt hollow-fibre membrane, in servicely set aeration period, sludge discharging period and backwash cycle as required, the submerged ultrafiltration system comprises membrane module, goes out water pump and backwash system, and wherein combined water and air backwash is adopted in back flushing.

Described reverse osmosis system, water inlet has reached fine water quality through pre-treatment, can guarantee the safe operation of reverse osmosis membrane, as a selectable technology, the reverse osmosis system main task is desalination, the organism of water outlet simultaneously also can reach lower effect, so that water outlet can reuse be made more strict process water, reverse osmosis system comprises security personnel's strainer, reverse osmosis membrane assembly, high-pressure pump and cleaning system.

The utility model is by little electrolysis process of iron charcoal and three-diemsnional electrode technology, make 90% above organism obtain removing, the technology working cost is cheap simultaneously, guarantee the organic indicator of follow-up reverse osmosis desalinization system water inlet, the dirt that reduces the film system is stifled, prolonged film work-ing life, for coking waste water reuse provides a kind of practicable operational path.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further described;

Fig. 1 is the utility model one example structure and functional block diagram;

Fig. 2 is the iron charcoal micro-electrolysis reactor structural representation of the utility model one embodiment;

Fig. 3 is an iron charcoal micro-electrolysis stuffing barrel structure synoptic diagram of the present utility model;

Fig. 4 is the 3 D electrode reactor principle of work synoptic diagram of the utility model one embodiment;

Fig. 5 is the 3 D electrode reactor electrode punch-out equipment structure synoptic diagram of the utility model one embodiment.

Embodiment

See Fig. 1, the equipment of a kind of coking wastewater deep treatment and reuse, comprise iron charcoal micro cell 1, coagulative precipitation tank 2,3 D electrode reactor 3, submerged ultrafiltration system 4 and reverse osmosis desalinization system 5, coking chemical waste water biochemical treatment water outlet a, add and enter iron charcoal micro cell 1 after acid is adjusted about pH value to 4.0, iron charcoal micro cell bubbling air b stirs, the iron and carbon bed water outlet is adjusted more than the pH value to 7.0, enter coagulative precipitation tank 2, mud c regularly discharges, and behind the coagulating sedimentation, waste water enters 3 D electrode reactor 3, continue bubbling air d operation in the three-dimensional electrolysis reactor operational process, the three-dimensional electrolysis water outlet enters submerged ultrafiltration pond 4, and ultra-filtration membrane produces water and enters reverse osmosis membrane system 5, and reverse osmosis water outlet e quality is higher, can be back to the production technique water, reverse osmosis concentrated water f discharges or is used for production and uses mixedly.

Further, described coagulative precipitation tank also can adopt coagulation floatation.

See Fig. 2, iron charcoal micro cell shown in Figure 3, its primary structure comprises: micro-electrolysis stuffing bucket 6, bottom aerating system 7 and central hole pipe 8, air is entered by central hole pipe 8, play stirring action, can strengthen mass transfer, avoid filler to harden, the filler 9 of filling is made up of compositions such as the aluminium bits of the iron filings of 2-3mm size, gac, 2-3mm size, leavening agents, wherein also can increase part copper scale, zinc bits, to strengthen the effect of catalyzed oxidation, sizing vat is outside supports 10, can adopt porous stainless steel or glass jar bucket, bucket outer cover net is placed packing leaking.

See embodiment illustrated in fig. 4,3 D electrode reactor principle of work synoptic diagram, waste water l and air m enter from reactor lower part, enter 3 D electrode reactor through water distribution filter 14,3 D electrode reactor is made up of positive plate 11, negative plate 12 and catalytic filler 13, the catalytic electrolysis reaction takes place under external power supply effect, and system's water outlet is by wastewater collection mouth n discharging, and waste gas is discharged by Waste gas outlet O.

Fig. 5 is the electrode box structure signal of through engineering approaches, and housing 16 adopts the glass jar material, and pole plate is provided with baffle plate 17, and positive plate 18 and negative plate 19 can be installed by pull, and the hanger 20 of electrode case can lift combination at engineering site.

Coking waste water reuse engineering site data that adopt above combination process to use are as shown in table 1 below:

	The second pond water outlet	The coagulating sedimentation water outlet	Water is produced in ultrafiltration	Reverse osmosis produced water
					CODcr(mg/l)	651	156	56	6
Colourity (doubly)	150	50	2	-
					TDS(mg/l)	2540	2801	2765	62

Table 1

Claims

1. the equipment of coking wastewater deep treatment and reuse, comprise coagulative precipitation tank, submerged ultrafiltration system and reverse osmosis desalinization system, it is characterized in that, also comprise iron charcoal micro-electrolysis reactor and three-diemsnional electrode catalyticreactor on the structure, the water-in of water outlet of iron charcoal micro-electrolysis reactor and coagulative precipitation tank is connected, be connected with 3 D electrode reactor then, the water outlet of 3 D electrode reactor is connected with follow-up submerged ultrafiltration system, is connected with reverse osmosis desalinization system after the ultrafiltration membrane system.

2. the equipment of a kind of coking wastewater deep treatment according to claim 1 and reuse is characterized in that, described iron charcoal micro-electrolysis reactor is made up of center aeration tube, filler fill area and overcoat bucket the micro-electrolysis stuffing bucket.

3. the equipment of a kind of coking wastewater deep treatment according to claim 1 and reuse is characterized in that, also is added with hydrogen peroxide in the described iron charcoal micro-electrolysis reactor.

4. the equipment of a kind of coking wastewater deep treatment according to claim 1 and reuse is characterized in that, described 3 D electrode reactor, comprise: negative plate and positive plate, water inlet, water outlet, inlet mouth, venting port, the power supply engaging mechanism, the high resistance particle filler, positive plate is connected with the power supply engaging mechanism, the high resistance particle filler is arranged between negative plate and positive plate, the electrode case of negative plate and positive plate constitution equipmentization.

5. the equipment of a kind of coking wastewater deep treatment according to claim 1 and reuse is characterized in that, is added with hydrogen peroxide in the described 3 D electrode reactor.

6. the equipment of a kind of coking wastewater deep treatment according to claim 1 and reuse is characterized in that, described 3 D electrode reactor adopts direct supply, running voltage 5-30V, ton water power consumption 1kwh.

7. the equipment of a kind of coking wastewater deep treatment according to claim 1 and reuse is characterized in that described coagulative precipitation tank also can adopt coagulation floatation.