CN206635157U - Sewage from Ships denitrogenation processing system - Google Patents

Abstract

A kind of Sewage from Ships denitrogenation processing system, it is characterised in that including the pretreatment unit, electrolysis cells and neutralization dechlorination unit being sequentially connected by pipeline.The method that the utility model is handled by using electrolytic oxidation electrode and preparing chlorine by electrolysis electrode combination, for Sewage from Ships denitrogenation processing.Structure is simplified, reduces volume, it is possible to reduce the floor space of technique before, hydraulic detention time is within 15min, and after processing, the clearance of total nitrogen is more than 90%, and more than 98%, the index such as SS, COD, BOD5 meets the clearance of total phosphorus《Sewage treatment unit effluent standards in 2012 and performance test implement directive/guide》Regulation, the growing amount of DBPs will reduce by more than 50% than traditional handicraft.

Description

Sewage from Ships denitrogenation processing system

Technical field

The utility model belongs to Sewage from Ships technical field, more particularly to the processing system of Sewage from Ships denitrogenation System.

Background technology

With the development of shipping industry, undressed ship sanitary wastewater is directly discharged in seawater, is to cause ocean dirty One major reason of dye.Also gradually attracted attention and paid attention to by the marine pollution matter transported by sea and brought.It is newest Revision《Sewage treatment unit effluent standards in 2012 and performance test implement directive/guide》Then nitrogen, phosphorus are also included in Con trolling index, but current ship sanitary wastewater handling process is to have significant limitations for the removal effect of nitrogen and phosphorus 's.

At present, existing conventional ship sewage treatment technique mainly has biochemical process, embrane method, electrochemical process etc..

Biochemical process processing land sanitary wastewater technology is highly developed, but the environmental condition on ship is disliked than land Bad much ship ceaselessly navigates by water, and hull temperature difference is big, and it is useless to be also higher than land life for salt content in ship sanitary wastewater Water, this requirement for microorganism itself is very high, it is difficult to there is a kind of microorganism to adapt to this condition, sewage disposal completely Outlet effect is unstable afterwards.And biochemical process processing ship sanitary wastewater floor space is big, management is more complicated, but can on ship Limited with space, biochemical process processing ship sanitary wastewater limitation is very high.

The embrane methods such as micro-filtration, nanofiltration, counter-infiltration are also a kind of common method of Sewage from Ships processing, and embrane method handles ship Sanitary wastewater is the process that pollutant is carried out to physical separation, it is impossible to fundamentally decomposes pollutant.Embrane method handles ship Although sanitary wastewater is to water quality requirement than relatively low, process operation cost is high, and in the process of running, influent side impurities in water is in film Area is tired to be cohered to form fouling membrane, so as to influence its operation stability and effluent quality, it is necessary to often carry out the cleaning of film.

Electrochemical process is one of widely used at present and extremely potential Sewage from Ships preprocess method.But Electro-oxidation electrode and preparing chlorine by electrolysis electrode are fused into one by traditional electrochemical process, when current density is too low, electroxidation electricity Pole oxidation susceptibility is not high, when current density is too high, then produces irreversible loss to preparing chlorine by electrolysis electrode, makes its service life Have a greatly reduced quality, and energy consumption is too high, converts electrical energy into for heat energy, make that water temperature rise is obvious, and operating cost is high, aoxidize and chlorine processed Integrated electrode is very little to the removal effect of total nitrogen.

The above analysis, prior art have that complicated, operating cost is high, inconvenient for operation, treatment effect does not reach The problems such as mark need to solve.

The content of the invention

In order to solve prior art, to have that complicated, operating cost is high, inconvenient for operation, treatment effect is not up to standard etc. all More problems, the utility model aim to provide a kind of Sewage from Ships denitrifying method.

The technical solution of the utility model is：A kind of Sewage from Ships denitrogenation processing system, it is characterised in that including logical Cross pretreatment unit, electrolysis cells and neutralization dechlorination unit that pipeline is sequentially connected.

The utility model has the advantages that：Structure is simplified, reduces volume, it is possible to reduce the floor space of technique before, Hydraulic detention time is within 15min, after processing, the clearance of total nitrogen more than 90%, the clearance of total phosphorus more than 98%, The indexs such as SS, COD, BOD5 meet《Sewage treatment unit effluent standards in 2012 and performance test implement directive/guide》 Regulation, the growing amount of DBPs will reduce by more than 50% than traditional handicraft.

Brief description of the drawings

Fig. 1 is that the overall of the utility model processing system forms schematic diagram.

Description of reference numerals：1st, TSS on-line measuring devices, 2, pre- flocculation plant, 3, flocculation stirring device, 4, flocculant storage Deposit tank, 5, flocculant automatic adding device, 6, sediment dehydration device, 7, sediment collection device after dehydration, 8, sludge filters out Liquid reflux, 9, electrolytic cell, 10, electrolytic oxidation electrode, 11, preparing chlorine by electrolysis electrode, 12, residual chlorine monitoring device, 13, thio sulphur Acid sodium solution conservation tank, 14, reducing agent automatic adding device, 15, neutralize dechlorination apparatus, 16, dechlorination agitating device.

Embodiment

Referring to Fig. 1, a kind of Sewage from Ships denitrogenation processing system of the utility model, including be sequentially connected by pipeline Pretreatment unit A, electrolysis cells B and neutralization dechlorination unit C.

Described pretreatment unit A includes：TSS on-line measuring devices 1, pre- flocculation plant 2, flocculation stirring device 3, flocculation Sediment collection device 7 and sludge filter out after agent holding vessel 4, flocculant automatic adding device 5, sediment dehydration device 6, dehydration Liquid reflux 8, TSS on-line measuring devices 1 are installed in the raw water introduction pipe line of pre- flocculation plant 2, in pre- flocculation plant 2 Equipped with flocculation stirring device 3, flocculant holding vessel 4 adds flocculation by flocculant automatic adding device 5 into pre- flocculation plant 2 Agent；Sediment dehydration device 6 is provided with the bottom of the pre- flocculation plant 2, the bottom of sediment dehydration device 6 after dehydration with precipitating Thing collection device 7 connects, and it is pre- that the liquid outlet of the sediment dehydration device 6 by sludge filter liquor reflux 8 returns to this Flocculation plant 2.

Described electrolysis cells B includes electrolytic cell 9, electrolytic oxidation electrode 10 and preparing chlorine by electrolysis electrode 11, in electrolytic cell 9 The electrolytic oxidation electrode 10 and preparing chlorine by electrolysis electrode 11 set equipped with multiple alternate intervals, around each preparing chlorine by electrolysis electrode 11 Two electrolytic oxidation electrodes 10 are set；The sewage inlet of the one end of electrolytic cell 9 and the sewage of the described bottom of pre- flocculation plant 2 go out Mouth connection.

Described neutralization dechlorination unit C includes residual chlorine monitoring device 12, hypo solution conservation tank 13, reducing agent certainly Dynamic throwing device 14, neutralize dechlorination apparatus 15 and dechlorination agitating device 16, electrolytic cell 9 outlet of sewer with and dechlorination apparatus Residual chlorine monitoring device 12 is installed, in this and dechlorination apparatus 15 is built with dechlorination agitating device 16 between 15 entrance；Thio sulphur Acid sodium solution conservation tank 13 by reducing agent automatic adding device 14, and according to the chlorine content of the detection of residual chlorine monitoring device 12 to Addition reducing agent in the neutralization dechlorination apparatus 15.

Utility model works process description is as follows：

（1）Pretreatment：

Sewage is input in pre- flocculation plant 2 from entrance, and detected by TSS on-line measuring devices 1, flocculant storage Tank 4 built with flocculant（Such as aluminium polychloride）, it is added in pre- flocculation plant 2, wads a quilt with cotton by flocculant automatic adding device 5 The dosage of solidifying agent is with Al³⁺Calculating is 1.5 times that numerical value is detected into water TSS；It is fast with flocculation stirring device 3 after putting into flocculant Speed stirring 20s, then mixes slowly 3min, precipitates 10min.After precipitation, supernatant liquor enters electrolysis cells B, lower floor's sludge Sediment collection device 7 and sludge filter liquor reflux 8 carry out dewater treatment after sediment dehydration device 6, dehydration, do After sludge after dry is collected, ship can carry out the burning electricity generation of land as solid waste after stopping, and sludge filter liquor then flows back to Into pre- flocculation plant 2, pre-processed.

（2）Raw water adds certain proportion seawater to be electrolysed：

Electrolysis cells B electrolytic cell 9 is entered by pretreated sewage, is now also required to introduce certain seawater, The volume ratio of seawater bulk and sewage is 1:3.Electrolytic oxidation electrolysis is carried out by electrolytic oxidation electrode 10, it is mainly that dissolubility is organic Thing is oxidized to inorganic matter, and soluble organic nitrogen is oxidized into ammonia nitrogen；Carry out chlorine processed by preparing chlorine by electrolysis electrode 11 simultaneously to be electrolysed, mainly Seawater electrolysis is produced into sodium hypochlorite, is gaseous nitrogen by ammonium oxidation, it is remaining so as to reach the effect for removing total nitrogen in water body Sodium hypochlorite then mainly kills pathogenic microorganism.Electrolysis time is 20s, and after the technique, total phosphorus removal effect can reach 98%, total nitrogen removal effect can reach the indexs such as more than 90%, COD, BOD5, thermotolerant coliform and meet《Live within 2012 Sewage-treatment plant effluent standard and performance test implement directive/guide》Regulation.

（3）Neutralize dechlorination：

Sewage after electrolysis is handled, which enters, neutralizes dechlorination unit C, and residual chlorine concentration is determined by residual chlorine monitoring device 12 Afterwards, reducing agent automatic adding device 14 is controlled, is gone back from hypo solution conservation tank 13 to addition in dechlorination apparatus 15 is neutralized Former agent（Such as sodium thiosulfate）, stirred with dechlorination agitating device 16.The concentration that adds of reducing agent is 1.5 times of chlorine residue, after neutralization Sewage be then directly discharged to outside hull.

The method that the utility model is handled by using electrolytic oxidation electrode and preparing chlorine by electrolysis electrode combination, for ship Domestic sewage denitrifying processing.Equipment and handling process are simple, it is only necessary to which three Cascade Systems, floor space is small, is conventional process The half of technique area, automaticity are high；The dosage of flocculant monitors numerical value on-line as index to feed back, respectively using TSS Individual unit realizes intelligent control, and oxidability is strong, kills that pathogenic microorganism effect is strong, denitrification effect is stable, ensure 90% with On, ton water process energy consumption is the half of original electrolysis, and electrode life increases substantially, and handles ship than traditional electrolysis The amount of DBPs is low caused by oceangoing ship sanitary wastewater.Therefore, have in Sewage from Ships denitrogenation processing field fabulous Application prospect.

Claims (1)

1. a kind of Sewage from Ships denitrogenation processing system, it is characterised in that including the pretreatment list being sequentially connected by pipeline Member, electrolysis cells and neutralization dechlorination unit；Described pretreatment unit includes：TSS on-line measuring devices, pre- flocculation plant, wadding Sediment collects dress after solidifying agitating device, flocculant holding vessel, flocculant automatic adding device, sediment dehydration device, dehydration Put with sludge filter liquor reflux, in the raw water introduction pipe line of pre- flocculation plant install TSS on-line measuring devices, wadding a quilt with cotton in advance Solidifying device is added built with flocculation stirring device, flocculant holding vessel by flocculant automatic adding device into pre- flocculation plant Flocculant；Sediment dehydration device is provided with the bottom of the pre- flocculation plant, the sediment dehydration device bottom after dehydration with sinking Starch collection device connects, and the liquid outlet of the sediment dehydration device returns to the pre- wadding by sludge filter liquor reflux Solidifying device；Described electrolysis cells include electrolytic cell, electrolytic oxidation electrode and preparing chlorine by electrolysis electrode, in electrolytic cell built with multiple The electrolytic oxidation electrode and preparing chlorine by electrolysis electrode that alternate intervals are set, two electrolysis oxygen are set in each preparing chlorine by electrolysis surrounding them Polarizing electrode；The sewage inlet of the electrolytic cell one end is connected with the outlet of sewer of described pre- flocculation plant bottom；Described neutralization Dechlorination unit includes residual chlorine monitoring device, hypo solution conservation tank, reducing agent automatic adding device, neutralization dechlorination apparatus With dechlorination agitating device, electrolytic cell outlet of sewer and between the entrance of dechlorination apparatus install residual chlorine monitoring device, The neutralization dechlorination apparatus is built with dechlorination agitating device；Hypo solution conservation tank by reducing agent automatic adding device, And reducing agent is added into the neutralization dechlorination apparatus according to the chlorine content of the detection of residual chlorine monitoring device.