CN210559967U

CN210559967U - Coking high pollution factor sewage pretreatment device

Info

Publication number: CN210559967U
Application number: CN201921615961.8U
Authority: CN
Inventors: 李自仁; 褚博源; 王少玉; 周良斌; 徐群星; 王和喜; 薛晓霞; 张海平
Original assignee: Wuhan Iron and Steel Group Echeng Iron and Steel Co Ltd
Current assignee: Baowu Group Echeng Iron and Steel Co Ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-05-19
Anticipated expiration: 2029-09-26

Abstract

The utility model relates to the coking wastewater treatment field, in particular to a coking high pollution factor sewage pretreatment device, which comprises an oil separation tank, a sedimentation tank and a biochemical tank which are connected in sequence, wherein an electrolytic tank is arranged between the oil separation tank and the sedimentation tank, an electrode for electrolyzing non-biochemical COD in coking wastewater is arranged in the electrolytic tank, and the heights of a water outlet of the oil separation tank, a water outlet of the electrolytic tank and a water outlet of the sedimentation tank are gradually reduced so as to ensure that the coking wastewater overflows step by step; the utility model discloses both reduced the concentration of pollution factor in the waste water, satisfied biochemical treatment's condition, cancelled the ammonia still again and carried out the distillation treatment method, reduced the energy consumption, and it is more convenient to maintain, operates simplyr.

Description

Coking high pollution factor sewage pretreatment device

Technical Field

The utility model relates to a coking wastewater treatment field specifically is a coking high pollution factor sewage pretreatment device.

Background

The high pollution factor sewage in the coking industry contains wastewater such as phenol and cyanogen, and the pretreatment method generally adopts the following method: mixing the sewage with high pollution factor into circulating ammonia water, spraying the circulating ammonia water into an ascending pipe of a coke oven for cooling, sending the circulating ammonia water and residual ammonia water generated in the coking process into an ammonia still for distillation treatment, meeting biochemical treatment conditions after the distillation treatment, and then carrying out subsequent treatment.

Problems with this approach are:

1. the consumption of steam is required; the high pollution factor sewage is treated by a normal pressure distillation method, and 1t of sewage needs 0.3t of steam, so that the energy consumption is increased.

2. The maintenance workload of the equipment is large. Scale is formed in the residual ammonia water pipeline entering the tower, after condensation drainage of a coke oven gas drainer and initial rainwater in a chemical production area are mixed with liquid caustic soda, scale is formed in the pipeline after water temperature rises, the pipeline is easy to block, and the pipeline needs to be cleaned manually at regular intervals; scaling on the tower tray, and scaling on the feeding tower tray needs manual cleaning when the ammonia distillation tower is overhauled.

Disclosure of Invention

The utility model aims at solving the problem that the distillation treatment of the ammonia still exists in the existing coking wastewater pretreatment, and providing a coking high pollution factor sewage pretreatment device.

The utility model has the following concrete scheme: the utility model provides a coking high pollution factor sewage pretreatment device, connects gradually including oil interceptor, sedimentation tank, biochemical pond, is provided with the electrolytic bath between oil interceptor and the sedimentation tank, is equipped with the electrode that is arranged in the electrolytic bath to electrolyze the biochemical COD of coking wastewater, and the delivery port of delivery port, electrolytic bath of oil interceptor, the delivery port height of sedimentation tank descend step by step so that coking wastewater overflows step by step.

The utility model discloses be equipped with the support on the electrolytic cell, be equipped with agitator motor on the support, agitator motor's output shaft still is equipped with the input device that adds ferrate in stretching into the electrolytic cell top in.

The bottom of the electrolytic cell is provided with a pipeline for conveying air.

Be equipped with the transition pond between electrolytic bath and the sedimentation tank, be equipped with agitating unit and add the interpolation device of flocculating agent in the transition pond.

The working principle of the utility model is as follows: coking wastewater is firstly discharged into an oil separation tank, heavy oil in the wastewater sinks and is separated from upper-layer water by standing, the upper-layer water flows into an electrolytic tank from a water outlet, the electrolytic tank can electrolyze COD which cannot be biochemically treated and is contained in the wastewater into biochemically treated COD by setting reasonable regulating voltage, electrolysis time and regulating the PH value of the wastewater to meet the electrolysis condition, the macromolecular organic matters are oxidized and decomposed into micromolecular organic matters, a pipeline at the bottom of the electrolytic tank conveys air into the tank to enable the wastewater to be disturbed and accelerated to react, the electrolyzed wastewater flows into a transition tank, a flocculating agent is uniformly mixed with the wastewater by adding the flocculating agent and stirring, then the coking wastewater stands and precipitates in a settling tank, the flocculating agent enables light oil contained in the wastewater to be polymerized and sink, and finally the upper-layer wastewater flows into the biochemical tank to be biochemically treated, so far.

Compared with the prior art, the utility model has the following advantage: the concentration of pollution factors in the wastewater is reduced through electrolytic treatment, the biochemical treatment condition is met, an ammonia distillation tower is omitted for distillation treatment, the energy consumption is reduced, the maintenance is more convenient, and the operation is simpler.

Drawings

FIG. 1 is a perspective view of the structure of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of the process flow of the present invention;

in the figure: 1-an oil separation tank, 2-a water outlet, 3-an electrolytic tank, 4-a stirring motor, 5-a bracket, 6-an electrode, 7-a feeding device, 8-a pipeline, 9-a transition tank, 10-an adding device, 11-a stirring device, 12-a sedimentation tank and 13-a biochemical tank.

Detailed Description

Referring to fig. 1-2, the embodiment includes that an oil separation tank 1, a sedimentation tank 12 and a biochemical tank 13 are connected in sequence, an electrolytic tank 3 is arranged between the oil separation tank 1 and the sedimentation tank 12, an electrode 6 for electrolyzing non-biochemical COD in the coking wastewater is arranged in the electrolytic tank 3, and the heights of a water outlet 2 of the oil separation tank 1, a water outlet 2 of the electrolytic tank and a water outlet 2 of the sedimentation tank are gradually lowered so as to facilitate the coking wastewater to overflow step by step.

In the embodiment, a support 5 is arranged on the electrolytic cell 3, a stirring motor 4 is arranged on the support 5, an output shaft of the stirring motor 4 extends into the electrolytic cell 3, and a throwing device 7 for adding ferrate is arranged above the electrolytic cell 3.

In this embodiment, the bottom of the electrolytic cell 3 is provided with a pipeline 8 for conveying air.

In this embodiment, a transition tank 9 is disposed between the electrolytic tank 3 and the sedimentation tank 12, and a stirring device 11 and an adding device 10 for adding a flocculant are disposed in the transition tank 9.

Claims

1. The utility model provides a dirty pretreatment of water device of high pollution factor of coking, connects gradually characterized by including oil interceptor, sedimentation tank, biochemical pond: an electrolytic cell is arranged between the oil separation tank and the sedimentation tank, an electrode for electrolyzing non-biochemical COD in the coking wastewater is arranged in the electrolytic cell, and the heights of the water outlet of the oil separation tank, the water outlet of the electrolytic cell and the water outlet of the sedimentation tank are gradually reduced so that the coking wastewater overflows step by step.

2. The pretreatment device of the coking high pollution factor sewage according to claim 1, which is characterized in that: the electrolytic cell is provided with a support, the support is provided with a stirring motor, an output shaft of the stirring motor extends into the electrolytic cell, and a throwing device for adding ferrate is arranged above the electrolytic cell.

3. The pretreatment device of the coking sewage with high pollution factor according to the claim 1 or 2, which is characterized in that: and a pipeline for conveying air is arranged at the bottom of the electrolytic cell.

4. The pretreatment device of the coking high pollution factor sewage according to claim 1, which is characterized in that: a transition tank is arranged between the electrolytic tank and the sedimentation tank, and a stirring device and an adding device for adding a flocculating agent are arranged in the transition tank.