CN208071436U - A kind of regulation and control municipal wastewater pipeline sulphur conversion system in situ - Google Patents

Abstract

A kind of regulation and control municipal wastewater pipeline sulphur conversion system in situ.The system includes municipal wastewater pipeline cesspool cover, microorganism electrochemical system and crane system, crane system upper end is fixed on cesspool cover, lower end connects microorganism electrochemical system, the crane system includes upper bracket, flexible module, lower bracket, fixture, the flexible module is fixed on by fixture on cesspool cover, the upper bracket forms X-type with lower bracket, the upper end of upper bracket and lower bracket is separately fixed at flexible module both sides, the lower end of upper bracket is fixed on lower bracket, the lower end of lower bracket connects microorganism electrochemical system, the electro-chemical systems include cathode sets, anode unit, conducting wire and telescopic sleeve, the cathode sets are connected with anode unit by the conducting wire for being cased with telescopic sleeve, the lower end of telescopic sleeve and lower bracket connects, the anode unit is located at the bottom of sewage conduct.Tthe utility model system is simple in structure, and sulphur changing effect is good, environmentally safe.

Description

A kind of regulation and control municipal wastewater pipeline sulphur conversion system in situ

Technical field

The utility model belongs to technical field of sewage, and in particular to a kind of regulation and control municipal wastewater pipeline sulphur conversion in situ System.

Background technology

Municipal wastewater pipeline corrodes the economic loss brought every year to the whole world and is up to multi-million dollar, wherein hydrogen sulfide （H₂S）Corrosion caused by release has become a most important origin cause of formation of sewage conduct " short-lived ".Meanwhile sewage conduct H₂S is released The poisoning for putting initiation is commonplace, and great threat is brought to the life and health of municipal drainage facility maintenance worker.With Urbanization in China is accelerated, municipal drainage pipe network during " 12th Five-Year Plan "（Rainwater and sewage conduct）Overall length reaches 510,000 kilometers, Meanwhile municipal drainage pipe network gradually will be included in underground pipe gallery during " 13 ", therefore, study municipal wastewater pipeline H₂S controls meet national Important Project technical need.

Sulfate in municipal wastewater（SO₄ ^2-）Concentration is usually in 20-200 mg/L, and certain enterprises produce waste water node SO can then be dramatically increased by being discharged into pipe network₄ ^2-Concentration.In municipal wastewater pipeline bottom anaerobic zone, SO₄ ^2-First bed mud sulfate also Opportunistic pathogen（SRB）It is converted into sulfide under effect（S^2-）, S^2-Again with the hydrogen ion in water（H⁺）In conjunction with generation H₂S is escaped.It is municipal dirty Waterpipe is difficult to that H is arranged₂S centralized collection processing units, therefore, from H₂The root that S is generated, i.e. S in sewage^2-It generates and is transformed into Hand solves H₂S, which discharges problem, has stronger realistic meaning.Conventional method is by the way that fungicide is added into pipeline（As follows chlorine Sour sodium, molybdate etc.）, highly basic, metal ion etc., pass through SRB inactivations, improve pH, precipitation S^2-Etc. modes suppress or eliminate S^2-, Advantage is that effect is rapid, the disadvantage is that cost is higher and constitutes unfavorable factor to follow-up sewage plant biochemical treatment.Bioanalysis converts S^2-Technology then relative clean mainly utilizes nitrate nitrogen（NO₃ ^-）, oxygen（O₂）Wait electron acceptors by S^2-It is converted into other morphologizations Close sulphur（S⁰, SO₄ ^2-, S₂O₃ ^2-Deng）, and bioanalysis is in S^2-It converts and takes advantage in the controllability of target product, while cost is opposite It is relatively low, it has also become the focus and emphasis of research and technology application.

Some key discharge points or sewage in sewage conduct stockpile place, such as resident compact district floss hole, chemical industry The pipeline junctions such as plant effluent mouth, emphasis pumping plant, the S that usual duct bottom generates^2-Concentration is higher, H₂S releases are stronger.NO₃ ^-Deng Electron acceptor flows together with sewage in the duct, and advantage is, " face source " property can be played to the sewage conduct of certain length S^2-Control action.S is generated currently, being directed to^2-The higher sewage conduct node of concentration, then lack " point source " of strong applicability Property sulphur transformation technology.

Microorganism electrochemical technology/system（Bio-electrochemical System, Bes）, it is Conventional electrochemical system The redox reaction that the anode and cathode of system at least side carries out under microorganism catalysis effect, combines microorganism and electricity The advantage of chemistry, electrode can have without being additionally provided electron acceptor, reaction is held as " fixation " electron acceptor of microorganism The advantages such as the continuous strong, non-secondary pollution of property.In wastewater treatment, underground water, bed mud, soil remediation, the research fields such as energy recovery take It must rapidly develop, to solve sewage conduct " point source " property S^2-Control provides breach.

Utility model content

It is difficult to generate S to municipal sewage pipe network for existing " flowing " electron acceptor that adds^2-The higher sewage well point of concentration Position carries out the problem of intensive control, and the purpose of this utility model is to provide a kind of regulation and control municipal wastewater pipeline sulphur transformation systems in situ System, the system structure is simple, sulphur changing effect is good, environmentally safe.

A kind of regulation and control municipal wastewater pipeline sulphur conversion system in situ, including municipal wastewater pipeline cesspool cover, microorganism electricity Chemical system and crane system, crane system upper end are fixed on cesspool cover, and lower end connects microorganism electrochemical System, the crane system include upper bracket, flexible module, lower bracket, fixture, and the flexible module is solid by fixture It is scheduled on cesspool cover, the upper bracket and lower bracket composition X-type, the upper end of upper bracket and lower bracket is separately fixed at flexible mould The lower end of block both sides, upper bracket is fixed on lower bracket, and the lower end of lower bracket connects microorganism electrochemical system, the electrochemistry System includes cathode sets, anode unit, conducting wire and telescopic sleeve, and the cathode sets are connected with anode unit by conducting wire, outside the conducting wire It is cased with telescopic sleeve, the lower end connection of the telescopic sleeve and lower bracket, the cathode sets are located at oilysewage surface and air interface, The anode unit is located at the bottom of sewage conduct.

It is that the flexible module is made of spring and thick line as improved, the upper end point of the upper bracket and lower bracket It is not fixed on the both sides of spring, the both ends of the spring is connected with thick line, and described thick line one end is fixed on screw, and the screw is solid It is scheduled on cesspool cover.

It is that the cathode sets level is placed at oilysewage surface and air interface, the anode unit and pipeline as improved At 0-90 °.

It is that the conducting wire is located at being wrapped up with PE pipes outside telescopic sleeve, and the anode unit is by three pairs of anodes as improved Electrode is formed in parallel, and each pair of anode electrode is longitudinally asymmetric, and the cathode sets are formed in parallel by three cathode electrodes.

It is that each anode electrode is to surround cylinder, the carbon fiber by four carbon fiber guiding brushes as improved Tie up a diameter of 50-100 mm, long 150-500 mm of conduction brush.

It is that each cathode electrode is the circle that the elliptical spiral shape made with carbon paper by four forms as improved Cylinder.

It is to be both needed to handle by biofilm before the anode unit Anodic electrode installation, then connect after parallel connection as improved To conducting wire.

It is that the crane system further includes plummer, and the plummer is fixed on cesspool cover as improved, leads to Fixture is crossed to be connected and fixed with flexible module.

The operation method of above-mentioned regulation and control municipal wastewater pipeline sulphur conversion system in situ, includes the following steps：Bilge well is installed Lid, crane system and microorganism electrochemical system contain SO in municipal wastewater pipeline₄ ^2-Sewage is by municipal wastewater pipeline bottom Sulfate reducing bacteria in sludge is reduced into S^2-, then pass through the sun in the anode unit of municipal wastewater pipeline bottom anaerobic zone Pole anodizing is at S⁰, while the S generated⁰It is rapidly separated with anode electrode by sluicing effect；It is placed in oilysewage surface and air Cathode electrode in the cathode sets of intersection receives electronics that anode unit passes over by oxygen reduction Cheng Shui, leads in operational process It crosses crane system and adjusts the position of anode unit and cathode sets respectively with telescopic sleeve, complete sulphur in sewage and convert.

Advantageous effect：

The cathode sets of the utility model use the floatation type electrode that is automatically adjusted with SEA LEVEL VARIATION, by four lighter weights Elliptical spiral shape composition is made in carbon paper, when flow by when cathode rotation can be pushed the oxygen belt in air using flow Upstream face improves the dissolved oxygen concentration near cathode, and oxygen is accelerated to receive the reaction rate that electron reduction is water in cathode；

The anode electrode material of the utility model anode unit is the preferable carbon fiber brush of biocompatibility, and cost is relatively low, And specific surface area is larger, is conducive to the apposition growth of microorganism, and biofilm effect is good, can promote the transmission of electronics, increases electricity Current density, when flow by when, current scour electrode makes elemental sulfur be rapidly separated with electrode, at the same also pushed anode turn It is dynamic, increase reaction contact area, accelerates conversion of the sulfide to sulphur simple substance；

Since single electrode is by factors shadows such as waterpower, water quality, flow velocity, microbial metabolism speed, extracellular electron transport rates It rings, electronics flowing is very limited, and each electrode in the cathode sets and anode unit of the utility model is all made of parallel connection Pattern, cathode are arranged side by side at oilysewage surface and air interface, and anode, which is arranged side by side, to be layered in sewage conduct bottom, cathode sets It is parallel with water (flow) direction to place angle, substantially increases the reduction reaction rate of cathode in this way；Crane in the utility model System provides very big convenience for the maintenance and repair of microorganism electrochemical system.

Description of the drawings

Fig. 1 is the structural schematic diagram of 1 system of the utility model embodiment, wherein 1- cesspool covers, 2- upper brackets, 3- sulphur Hydrochlorate reducing bacteria, 4- lower brackets, 5- fixtures, 7- cathode sets, 8- anode units, 9- telescopic sleeves, 10- springs, 11- thick lines, 12- plummers, 13- screws；

Fig. 2 is the vertical view of Tthe utility model system Anodic group；

Fig. 3 is the vertical view of cathode sets in Tthe utility model system；

Fig. 4 is the internal structure chart of Tthe utility model system Anodic group and the casing of cathode sets junction, and wherein 6- is led Line；

Fig. 5 be Tthe utility model system Anodic group and pipeline at different angle when, sewage SO₄ ^2-A concentration of 150 ± 5mg/ In the case of L, sulphur converted product in sewage（SO₄ ^2-、S^2-、S⁰、H₂S、S₂O₃ ^2-）Concentration ratio；

Fig. 6 is Tthe utility model system in SO containing various concentration₄ ^2-Sulphur converted product in sewage（SO₄ ^2-、S^2-、S⁰、H₂S、 S₂O₃ ^2-）Concentration ratio；

Fig. 7 is SO containing various concentration₄ ^2-Sulphur converted product in sewage conduct（SO₄ ^2-、S^2-、S⁰、H₂S、S₂O₃ ^2-）Concentration ratio Example.

Specific implementation mode

Below in conjunction with the accompanying drawings technical solutions of the utility model are elaborated with embodiment.

Embodiment 1

A kind of regulation and control municipal wastewater pipeline sulphur conversion system in situ, including municipal wastewater pipeline cesspool cover, microorganism electricity Chemical system and crane system, crane system upper end are fixed on cesspool cover 1, and lower end connects microorganism electrochemical System, the crane system include upper bracket 2, flexible module, lower bracket 4, fixture 5, and the flexible module passes through fixation Object 5 is fixed on cesspool cover 1, and the upper bracket 2 forms X-type with lower bracket 4, and upper bracket 2 and the upper end of lower bracket 4 are solid respectively Flexible module both sides are scheduled on, module of stretching shrinks the size for changing X-type angle, completes flexible purpose, realizes microorganism electrification The variation of the position of system.The lower end of upper bracket 2 is fixed on lower bracket 4, and the lower end of lower bracket 4 connects microorganism electrochemical System, the electro-chemical systems include cathode sets 7, anode unit 8, conducting wire 6 and telescopic sleeve 9, the cathode sets 7 and anode unit 8 It is connected by conducting wire 6, is cased with telescopic sleeve 9 outside the conducting wire 6, the telescopic sleeve 9 is connect with the lower end of lower bracket 4, described the moon Pole group 7 is located at oilysewage surface and air interface, and the anode unit 8 is located at the bottom of sewage conduct.

Short-circuit in order to prevent, the conducting wire 6 is located at the part outside telescopic sleeve 9 and is wrapped up with PE pipes, then uses conduction Cream and plastic clip connecting wire and extraneous resistance, form closed circuit.In addition, when cathode sets 7 are with SEA LEVEL VARIATION, with telescopic The PE pipes of the cathode sets 7 of 9 top of pipe connection also move up and down therewith, solid with the PE pipes of 9 lower part jointed anode group 8 of telescopic sleeve It is scheduled on crane, the conducting wire 6 inside telescopic sleeve 9 can extend or shorten with 7 change in location of cathode sets.

The flexible module is made of spring 10 and thick line 11, and the upper end of the upper bracket 2 and lower bracket 4 is separately fixed at 10 both sides of spring, 10 both ends of the spring are connected with thick line 11, and 11 one end of the thick line is fixed on screw 13, the screw 13 It is fixed on cesspool cover 1.In operational process, thick line 11 is twitched by rotary screw 13, drives spring 10 to deform upon, in turn Change the X-type angle number of degrees of upper bracket 2 and lower bracket 4 so that upper bracket 2 is pasted with lower bracket 4 close or remote from cesspool cover 1, complete At the position change of microorganism electrochemical system；When all holders all close to cesspool cover 1 when, mobile cesspool cover can be passed through 1 takes out crane system together with microorganism electrochemical system, is convenient for the maintenance and repair of microorganism electrochemical system.

Further improved to be, the crane system further includes plummer 12, and the plummer 12 is fixed on bilge well On lid 1, and it is connected and fixed by fixture 5 and flexible module.It can realize that the distance of both ends of the spring changes by rotary screw 13, Contraction process is completed, and plummer 12 can reduce abrasion of the screw 13 to cesspool cover.

Each anode electrode of the anode unit 8 is the cylinder surrounded by four carbon fiber guiding brushes, the carbon fiber A diameter of 50-100 mm of conduction brush, long 150-500 mm, it is because of carbon fiber biological compatibility to select carbon fiber guiding brush It is good, and large specific surface area, be conducive to the apposition growth of microorganism, and biofilm effect is good, the transmission of electronics can be promoted, increases electrode Density, when flow by when, wash away electrode, elemental sulfur made to be rapidly separated with electrode, while also having pushed the rotation of anode, increase Reaction contact area accelerates conversion of the sulfide to sulphur simple substance.

It is that the anode electrode of anode unit 8 can be tamed and dociled in a pre-installation by electroactive microorganism accumulating potential as improved Change the anode sulfur oxidizing organism film with catalytic activity, i.e. biofilm is handled, and the biofilm is as follows：Using three electrode bodies Anaerobic grain sludge after break process is first pressed 1 by system, Ag/AgCl as reference electrode with simulation sulfur compound sewage：1 Ratio, which is added to, to be had been subjected in autoclaved electrochemical reactor working electrode room, and sludge passes through denitrification desulfurization before being derived from Then the device of domestication exposes 70% nitrogen and 30% carbon dioxide gas mixture, 20 min to remove the dissolved oxygen in culture solution and anti- Answer the air at the top of device.8 plant heights effect sulfur oxidizing bacterium strain shaking table culture in LB culture solutions of screening early period is stayed overnight（In 30 DEG C, 180 rpm）.It takes 8 plant heights being incubated overnight to imitate 2 mL of sulfur oxidizing bacterium strain liquid, is inoculated in electrochemical reaction working electrode room, electrification The pH value learned in reaction chamber is controlled in 8.0-8.5, is controlled working electrode potential by electrochemical workstation, is made it Maintain -0.27 V.First 5 days, anaerobic sludge and simulation sulfur compound sewage are replaced daily, later with the dirt of pure simulation sulfur compound Water is cultivated, and during this, is persistently aerated to working electrode room, temperature is maintained at 30 DEG C.

Each cathode electrode is the cylinder that the elliptical spiral shape made with carbon paper by four forms in the cathode sets 7 Body, when installation cathode sets 7 be located at oilysewage surface at air interface, and it is parallel with water (flow) direction, substantially increase the reduction of cathode Reaction rate.

Embodiment 2

A kind of operation method of above-mentioned regulation and control municipal wastewater pipeline sulphur conversion system in situ, includes the following steps：Installation is dirty Well cover, crane system and microorganism electrochemical system contain SO in municipal wastewater pipeline₄ ^2-Sewage is by duct bottom sludge In sulfate reducing bacteria 3 be reduced into S^2-, then by the anodic oxidation in the anode unit 8 of duct bottom anaerobic zone at S⁰, while the S generated⁰It is rapidly separated with anode by sluicing effect；The cathode sets 7 being placed at oilysewage surface and air interface In cathode receive the electronics that passes over of anode by oxygen reduction Cheng Shui.In operational process by crane system be microorganism Electro-chemical systems carry out maintenance and repair.The utility model samples sewage in system to monitor the concentration of sulphur converted product Change and sampling determination H is carried out to 1 overhead gas of cesspool cover₂S concentration.

Embodiment 3

SO in usual sewage₄ ^2-Fluctuation of concentration ranging from 20-200 mg/L, in order to investigate anode unit and pipeline angulation Best to sewage conduct sulphur changing effect when why being worth, the utility model is in sewage SO₄ ^2-In the case of a concentration of 150 ± 5mg/L One group of control case is done（That is anode unit and pipeline is at 0 °, 30 °, 45 °, 60 °, 90 °）, except anode unit it is different from pipe angle it Outside, remaining implementation steps and implementation content are same as described above.

As can be seen from Figure 5, in SO₄ ^2-When a concentration of 150 ± 5mg/L, anode unit is with pipeline at 0 °, 30 °, 45 °, 60 °, 90 ° When, S in sulphur converted product⁰The ratio accounted in sulfur speciation respectively reaches 67%, 70%, 83%, 68%, 60%, S^2-Ratio be 19%, 8%, 4%, 9%, 14%, it can be seen that, anode unit is more conducive to sewage conduct sulphur relative to other angles with pipeline setting at 45 ° and turns Change, accelerate conversion of the sulfide to sulphur simple substance, improve electrode and mass transfer in liquid phase rate and current scour make elemental sulfur, Noxious material rate separated from the electrodes.

Embodiment 4

On the basis of embodiment 3, under conditions of to select anode unit and pipeline angle be 45 °, with different sewage SO₄ ^2-It is dense Degree（50±1.6 mg/L,100±3.4 mg/L,150±5 mg/L,200±4.5 mg/L）To investigate sewage SO₄ ^2-Concentration wave The operation stability and operational effect of dynamic lower this system.Meanwhile a control group is set and compares S^2-、H₂S cuts down effect.

As seen from Figure 6, the sulphur converted product that Tthe utility model system obtains under different sewage concentration（SO₄ ^2-、S^2-、S⁰、 H₂S、S₂O₃ ^2-）Ratio, S^2-Removal rate is up to 90% or more, S⁰Conversion ratio is more than 85%, H₂S yields are less than 4%；

As seen from Figure 7, S is generated in the sewage conduct of non-implant electrode^2-Concentration has no significant change, H₂S yields are higher than 20% It can be seen that regulation and control municipal wastewater pipeline sulphur conversion system in situ is with obvious effects, and under different sewage fluctuation of concentration, sulphur conversion Effect stability.

In addition, the present invention is not limited to the above embodiments, as long as in without departing from the scope of the utility model, it can be with Various modes are taken to implement the utility model.

Claims (8)

1. a kind of regulation and control municipal wastewater pipeline sulphur conversion system in situ, which is characterized in that including municipal wastewater pipeline cesspool cover, Microorganism electrochemical system and crane system, crane system upper end are fixed on cesspool cover, and lower end connects micro- life Object electro-chemical systems, the crane system include upper bracket, flexible module, lower bracket, fixture, and the flexible module passes through Fixture is fixed on cesspool cover, the upper bracket and lower bracket composition X-type, and the upper end of upper bracket and lower bracket is fixed respectively In flexible module both sides, the lower end of upper bracket is fixed on lower bracket, and the lower end of lower bracket connects microorganism electrochemical system, institute It includes cathode sets, anode unit, conducting wire and telescopic sleeve to state electro-chemical systems, and the cathode sets are connected with anode unit by conducting wire, institute It states and is cased with telescopic sleeve outside conducting wire, the lower end of the telescopic sleeve and lower bracket connects, and the cathode sets are located at oilysewage surface and sky Gas intersection, the anode unit are located at the bottom of sewage conduct.

2. a kind of regulation and control municipal wastewater pipeline sulphur conversion system in situ according to claim 1, which is characterized in that described to stretch Contracting module is made of spring and thick line, and the upper end of the upper bracket and lower bracket is separately fixed at the both sides of spring, the spring Both ends are connected with thick line, and described thick line one end is fixed on screw, and the screw is fixed on cesspool cover.

3. a kind of regulation and control municipal wastewater pipeline sulphur conversion system in situ according to claim 1, which is characterized in that described the moon Pole group level is placed at oilysewage surface and air interface, and the anode unit is with pipeline at 0-90 °.

4. a kind of regulation and control municipal wastewater pipeline sulphur conversion system in situ according to claim 1, which is characterized in that described to lead Line is located at being wrapped up with PE pipes outside telescopic sleeve, and the anode unit is formed in parallel by three pairs of anode electrodes, and each pair of anode electrode is vertical To symmetrical, the cathode sets are formed in parallel by three cathode electrodes.

5. a kind of regulation and control municipal wastewater pipeline sulphur conversion system in situ according to claim 4, which is characterized in that described every A anode electrode is to surround cylinder by four carbon fiber guiding brushes, and a diameter of 50-100 mm of the carbon fiber guiding brush are long 150-500 mm。

6. a kind of regulation and control municipal wastewater pipeline sulphur conversion system in situ according to claim 4, which is characterized in that described every A cathode electrode is the cylinder that the elliptical spiral shape made with carbon paper by four forms.

7. a kind of regulation and control municipal wastewater pipeline sulphur conversion system in situ according to claim 4, which is characterized in that the sun It is both needed to handle by biofilm before the group Anodic electrode installation of pole, then is connected on conducting wire after parallel connection.

8. a kind of regulation and control municipal wastewater pipeline sulphur conversion system in situ according to claim 1, which is characterized in that the liter It further includes plummer to drop frame system, and the plummer is fixed on cesspool cover, is connected and fixed by fixture and flexible module.