CN217578613U

CN217578613U - Biochemical tail water treatment system in petrochemical industry

Info

Publication number: CN217578613U
Application number: CN202221214915.9U
Authority: CN
Inventors: 张晶晶; 夏季春; 郭磊; 杨志林
Original assignee: Jiangsu Fangyang Water Co ltd
Current assignee: Jiangsu Fangyang Water Co ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-10-14
Anticipated expiration: 2032-05-20

Abstract

The utility model discloses a petrochemical industry biochemical tail water treatment system, which comprises a pretreatment unit, a biochemical filtering unit and an ozone catalyzing unit; the pretreatment unit include quality of water equalizing basin, thermostatic bath I, sedimentation tank, anaerobism pond, good oxygen pond and membrane bioreactor, ozone catalytic unit include thermostatic bath II, ozone catalytic oxidation pond and denitrification deep bed filtering pond, the play water end union coupling of thermostatic bath II to denitrification deep bed filtering pond intake the end. When the sedimentation tank is used for carrying out biochemical tail water sedimentation, the temperature of the sedimentation tank is not too high, the biochemical tail water entering the constant temperature tank I can be cooled through the constant temperature tank I, and the sedimentation efficiency of the sedimentation tank is improved; set up thermostatic bath II at the end of intaking in ozone catalytic oxidation pond, thermostatic bath II can heat up or cool down the processing to the biochemical tail water after handling through the resin adsorption tank for biochemical tail water reaches the required temperature of target technology, and maneuverability is strong.

Description

Petrochemical industry biochemical tail water treatment system

Technical Field

The utility model relates to a biochemical tail water treatment field of petrochemical industry specifically is biochemical tail water processing system of petrochemical industry.

Background

Aiming at the outstanding problems of difficult degradation and high treatment cost of biochemical tail water in the petrochemical industry, the integrated process research of tail water ozone catalytic oxidation and resin adsorption is developed by taking stable standard discharge of waste water and high-school low-consumption removal of pollutants as targets, the low-energy-consumption deep purification of biochemical tail water in the petrochemical industry is realized, and the aim of marking and discharging the effluent water quality is fulfilled.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is not enough to prior art, provide an index that reduces COD, ammonia nitrogen, total nitrogen and total phosphorus in the production tail water, and carry out the biochemical tail water processing system of petrochemical industry that constant temperature handled to sewage at AO processing stage and ozone catalyst reaction stage.

The utility model solves the technical problem that the biochemical tail water treatment system in petrochemical industry comprises a pretreatment unit, a biochemical filtration unit and an ozone catalysis unit;

the pretreatment unit comprises a water quality adjusting tank, a thermostatic tank I, a sedimentation tank, an anaerobic tank, an aerobic tank and a membrane bioreactor, wherein the water outlet end of the water quality adjusting tank is connected to the water inlet end of the thermostatic tank I through a pipe;

the biochemical filtering unit comprises a biochemical tank and a resin adsorption tank, wherein the water outlet end pipe of the membrane bioreactor is connected to the water inlet end of the biochemical tank, and the water outlet end pipe of the biochemical tank is connected to the resin adsorption tank;

ozone catalytic unit include thermostatic bath II, ozone catalytic oxidation pond and denitrification deep bed filtering pond, the play water end union coupling of resin adsorption tank to ozone catalytic oxidation pond intake end, ozone catalytic oxidation pond go out water end union coupling to thermostatic bath II intake end, thermostatic bath II go out water end union coupling to denitrification deep bed filtering pond intake end.

The utility model discloses the technical problem that solve can also be realized through following technical scheme, above the biochemical tail water processing system of petrochemical industry, ozone catalytic oxidation pond in have ozone aeration pipe and be used for adding the pencil that adds of ozone catalytic oxidation agent, ozone aeration pipe and pencil circumference arrange on the four sides inner wall in ozone catalytic oxidation pond, the pencil that adds include on the liquid level with pencil and liquid level down with the pencil, the liquid level on add pencil, liquid level down with pencil and ozone aeration pipe from top to bottom the installation and arrange.

The to-be-solved technical problem of the utility model can also be realized through following technical scheme, above petrochemical industry biochemical tail water processing system, the resin adsorption tank be provided with threely, three resin adsorption tank's the end of intaking is in with the parallelly connected setting of play water end biochemical pond's the end of intaking and ozone catalytic oxidation pond between the end.

The utility model discloses the technical problem that solve can also be realized through following technical scheme, above the biochemical tail water treatment system of petrochemical industry, quality of water equalizing basin, thermostatic bath I, sedimentation tank, anaerobism pond, good oxygen pond, membrane bioreactor, biochemical pond, resin adsorption tank, thermostatic bath II, ozone catalytic oxidation pond and denitrification deep bed filtering pond between the pipeline on all install pump and valve.

Compared with the prior art, the utility model has the advantages that:

(1) When the sedimentation tank is used for carrying out biochemical tail water sedimentation, the temperature of the sedimentation tank is not too high, the biochemical tail water entering the constant temperature tank I can be cooled through the constant temperature tank I, and the sedimentation efficiency of the sedimentation tank is improved;

(2) The biochemical tail water can be subjected to denitrification and dephosphorization treatment through the anaerobic tank and the aerobic tank, and organic matters in the water can be removed, and the water inlet and outlet ends of the anaerobic tank and the aerobic tank are designed in series, so that the water treatment process is simple, and the operation cost is low;

(3) Set up constant temperature pond II at the end of intaking in ozone catalytic oxidation pond, constant temperature pond II can heat up or cool down the processing through the biochemical tail water after the resin adsorption tank is handled for biochemical tail water reaches the required temperature of target technology, and maneuverability is strong.

Drawings

FIG. 1 is a flow diagram of tail water treatment;

fig. 2 is a schematic top view of the ozone catalytic oxidation tank.

In the figure, 1, a water quality adjusting tank; 2. a constant-temperature pool I; 3. a sedimentation tank; 4. an anaerobic tank; 5. an aerobic tank; 6. a membrane bioreactor; 7. a biochemical pool; 8. a resin adsorption tank; 9. a constant temperature pool II; 10. an ozone catalytic oxidation tank; 11. a denitrification deep bed filter; 12. an ozone aeration pipe; 13. a medicine feeding pipe is arranged on the liquid surface; 14. a medicine feeding pipe below the liquid surface.

Detailed Description

The embodiments of the present invention will be further described with reference to the accompanying drawings so as to enable those skilled in the art to further understand the present invention, and not to limit the right of the present invention.

Embodiment 1, referring to fig. 1-2, a petrochemical industry biochemical tail water treatment system comprises a pretreatment unit, a biochemical filtration unit and an ozone catalysis unit;

the pretreatment unit comprises a water quality adjusting tank 1, a constant temperature tank I2, a sedimentation tank 3, an anaerobic tank 4, an aerobic tank 5 and a membrane bioreactor 6, wherein the water quality adjusting tank 1 is used for adjusting the pH value of biochemical tail water, and simultaneously provides buffer capacity for organic matter load to prevent rapid change of a biological treatment system, the size and specification of the water quality adjusting tank 1 adopted in the treatment system can be customized according to the use requirement, so the specific size and specification are not repeated herein, a water outlet end pipe of the water quality adjusting tank 1 is connected to a water inlet end of the constant temperature tank I2, heat exchange pipes can be laid at the bottoms of the constant temperature tank I2 and the constant temperature tank II to control the temperature of fluid in the constant temperature tank I2 and the constant temperature tank II, specifically, the temperature in the constant temperature tank I2 can be controlled to be 5-12 ℃, the sedimentation efficiency of the sedimentation tank 3 can be improved at lower temperature, the temperature in the constant temperature tank II can be controlled to be 15-30 ℃, specifically, the constant temperature tank II can be 26 ℃, the water outlet end of the constant temperature tank I2 is connected with the water inlet end of the sedimentation tank 3, the water outlet end of the sedimentation tank 3 is connected with the water inlet end of the anaerobic tank 4, the water outlet end of the anaerobic tank 4 is connected with the water inlet end of the aerobic tank 5, the water outlet end of the aerobic tank 5 is connected with the water inlet end of the membrane bioreactor 6, the anaerobic tank 4 is designed for removing organic matters in biochemical tail water and improving the biodegradability of the biochemical tail water, the aerobic tank 5 is designed for enabling active sludge in the aerobic tank 5 to breathe with oxygen and further grading the organic matters into inorganic matters so as to remove pollutants, and the membrane bioreactor 6 is designed for effectively removing suspended matters in the biochemical tail water, the water quality is improved, and the model and the specification are customized according to the use requirement, so the specific model and specification are not described again;

the biochemical filtering unit comprises a biochemical tank 7 and a resin adsorption tank 8, wherein a water outlet end pipe of the membrane bioreactor 6 is connected to a water inlet end of the biochemical tank 7, a water outlet end pipe of the biochemical tank 7 is connected to the resin adsorption tank 8, an adsorption medium of the resin adsorption tank 8 is macroporous resin, the working pressure of the resin adsorption tank is 0.3MPa, the biochemical filtering unit is designed for adsorbing and filtering impurity dirt in biochemical tail water, the water quality is further improved, and the specific using method and principle of the biochemical filtering unit are not repeated in the prior art;

ozone catalytic unit include thermostatic bath II 9, ozone catalytic oxidation pond 10 and denitrification deep bed filtering pond 11, the design purpose in the denitrification deep bed filtering pond 11 is to total nitrogen, total phosphorus and the suspended solid in the biochemical tail water to this further improvement quality of water, the ozone catalytic oxidation agent type in the ozone catalytic oxidation pond 10 can select so by oneself according to the user demand no longer gives unnecessary details here its specific type, the play water end union coupling of resin adsorption tank 8 to the end of intaking of ozone catalytic oxidation pond 10, the play water end union coupling of ozone catalytic oxidation pond 10 to the end of intaking of thermostatic bath II 9, the play water end union coupling of thermostatic bath II 9 to the end of intaking of denitrification deep bed filtering pond 11.

Embodiment 2, biochemical tail water processing system of petrochemical industry of embodiment 1, ozone catalytic oxidation pond 10 in have ozone aeration pipe 12 and be used for adding the pencil that adds of ozone catalytic oxidation agent, ozone aeration pipe 12 and pencil circumference arrange on the four sides inner wall of ozone catalytic oxidation pond 10, the pencil that adds include that liquid level adds pencil 13 and liquid level down and add pencil 14, liquid level add pencil 13, liquid level down and add pencil 14 and ozone aeration pipe 12 from top to bottom installation arrangement.

In embodiment 2, set up liquid level and add pencil 13 and liquid level and add pencil 14 and can feed in raw material to ozone catalytic oxidation pond 10, liquid level adds pencil 14 below has ozone aeration pipe 12, when adding ozone catalytic oxidation agent to ozone catalytic oxidation pond 10 through liquid level add pencil 13 and liquid level down with pencil 14, can start ozone aeration pipe 12 and supply ozone, can fully contact with ozone catalytic oxidation agent during ozone floats, thereby carry out effective processing to biochemical tail water, liquid level adds pencil 13 and liquid level down and adds pencil 14 the mounting height and can select by oneself according to the user demand.

Embodiment 3, embodiment 1 biochemical tail water processing system of petrochemical industry, resin adsorption tank 8 be provided with threely, three resin adsorption tank 8 intake end and play water end parallel arrangement be in biochemical pond 7 go out the water end and the ozone catalytic oxidation pond 10 intake between the end, its quantity can choose for use by oneself according to the user demand so the limit of resin adsorption tank 8 quantity is no longer being repeated here.

In embodiment 3, a plurality of resin adsorption tanks 8 are connected in parallel to the treatment system, the arrangement can improve the treatment efficiency of biochemical tail water, and even if one of the resin adsorption tanks 8 cannot normally operate, the other resin adsorption tanks 8 can be replaced by the other resin adsorption tanks, so that the operability is high.

Embodiment 4, embodiment 1 biochemical tail water processing system of petrochemical industry, quality of water equalizing basin 1, constant temperature pond I2, sedimentation tank 3, anaerobism pond 4, good oxygen pond 5, membrane bioreactor 6, biochemical pond 7, resin adsorption tank 8, constant temperature pond II 9, ozone catalytic oxidation pond 10 and denitrification deep bed filtering pond 11 between the pipeline all install pump and valve.

The use principle of the biochemical tail water treatment system in the petrochemical industry is as follows:

biochemical tail water firstly enters a water quality regulating tank 1, the pH value of the biochemical tail water in the water quality regulating tank 1 is regulated according to process treatment requirements, the biochemical tail water enters a constant temperature tank I2 after reaching the process requirements, the biochemical tail water in the constant temperature tank I2 is subjected to heat exchange with the biochemical tail water through a heat exchange pipe in the constant temperature tank I2, the temperature of the biochemical tail water in the constant temperature tank I2 is within a range of 5-12 ℃, the subsequent precipitation efficiency of the biochemical tail water can be improved at a lower temperature, the cooled biochemical tail water flows out of the constant temperature tank I2 and then enters a precipitation tank 3 for precipitation, a flocculating agent can be added into the precipitation tank 3 for auxiliary precipitation, the precipitated biochemical tail water is respectively subjected to removal of organic matters in an anaerobic tank 4 and an aerobic tank 5, biochemical tail water in the anaerobic tank 4 enters the aerobic tank 5, and tail water in the aerobic tank 5 enters a membrane bioreactor 6, impurities such as suspended matters and the like in biochemical tail water are further filtered and removed through a membrane bioreactor 6, biochemical tail water outlet water in the membrane bioreactor 6 enters a biochemical tank 7 for biochemical degradation, outlet water of the biochemical tank 7 enters a resin adsorption tank 8, the biochemical tail water is further adsorbed and filtered by the resin adsorption tank 8, the filtering precision and the filtering time of the biochemical tail water can be automatically adjusted according to the process requirements, the biochemical tail water after adsorption and filtration exits the resin adsorption tank 8 and enters a constant temperature tank II 9, the temperature of the biochemical tail water is controlled to be between 15 and 30 ℃ through a heat exchange tube in the constant temperature tank II 9, specifically 26 ℃, the biochemical tail water after temperature adjustment enters an ozone catalytic oxidation tank 10 through outlet water of the constant temperature tank II 9, a certain amount of ozone catalytic oxidant can be added into the ozone catalytic oxidation tank 10, and CDO in the biochemical tail water is further removed, the effluent of the biochemical tail water in the ozone catalytic oxidation tank 10 enters a denitrification deep-bed filter 11, the total nitrogen, total phosphorus and suspended matters in the biochemical tail water are removed through the denitrification deep-bed filter 11, and the effluent of the denitrification deep-bed filter 11 is discharged.

Claims

1. Biochemical tail water processing system of petrochemical industry, its characterized in that: comprises a pretreatment unit, a biochemical filtering unit and an ozone catalyzing unit;

ozone catalytic unit include constant temperature bath II, ozone catalytic oxidation pond and deep bed filtering pond of denitrification, the water outlet end union coupling of resin adsorption tank the ozone catalytic oxidation pond intake end, the water outlet end union coupling of ozone catalytic oxidation pond the water inlet end of constant temperature bath II, the water outlet end union coupling of constant temperature bath II to the deep bed filtering pond of denitrification hold of intaking.

2. The petrochemical industry biochemical tail water treatment system according to claim 1, wherein: the ozone catalytic oxidation pond in have the ozone aeration pipe and be used for adding the pencil that adds of ozone catalytic oxidation agent in the ozone catalytic oxidation pond, ozone aeration pipe and pencil circumference arrange on the four sides inner wall of ozone catalytic oxidation pond, the pencil that adds include that the liquid level adds pencil and liquid level down add the pencil, liquid level add pencil, liquid level down add pencil and ozone aeration pipe from top to bottom the installation and arrange.

3. The petrochemical industry biochemical tail water treatment system according to claim 1, wherein: the three resin adsorption tanks are arranged, and the water inlet ends and the water outlet ends of the three resin adsorption tanks are connected in parallel between the water outlet end of the biochemical tank and the water inlet end of the ozone catalytic oxidation tank.

4. The petrochemical industry biochemical tail water treatment system according to claim 1, wherein: and a pump and a valve are arranged on a pipeline between the water quality adjusting tank, the constant temperature tank I, the sedimentation tank, the anaerobic tank, the aerobic tank, the membrane bioreactor, the biochemical tank, the resin adsorption tank, the constant temperature tank II, the ozone catalytic oxidation tank and the denitrification deep bed filter tank.