CN206219398U - A kind of Texaco stove coal gas wastewater biochemical treatment system - Google Patents

Abstract

A kind of Texaco stove coal gas wastewater biochemical treatment system, including Heisui River subsider, Ca²⁺、Mg²⁺Reaction settling basin, Anaerobic Treatment unit, aerobic treatment unit and second pond, the top delivery port of the Heisui River subsider connect Ca by valve on subsider²⁺、Mg²⁺Reaction settling basin, Ca²⁺、Mg²⁺The top discharge outlet of reaction settling basin connects Anaerobic Treatment unit by the first draining pump, the discharge outlet of Anaerobic Treatment unit connects oxygen processing unit by the second draining pump, the discharge outlet of aerobic treatment unit connects second pond by the 3rd draining pump, and second pond top connects the water inlet of Anaerobic Treatment unit by sewage backflow pipe, second pond bottom connects Anaerobic Treatment unit and aerobic treatment unit by mud return line；The utility model flow is simple, easily operated, can rapidly and efficiently remove waste water Ca²⁺、Mg²⁺Ion simultaneously carries out resource reclaim, significantly improves biochemical system influent quality, improves biochemical effects, realizes the theory of recycling industries and clean production.

Description

A kind of Texaco stove coal gas wastewater biochemical treatment system

Technical field

The utility model is related to industrial waste water treatment, especially at a kind of Texaco stove coal gas wastewater biochemistry Reason system.

Background technology

Increasingly in short supply due to global range petroleum resources, China's Coal Chemical Industry turns into the strategy weight of economic development in recent years Point, particularly producing clear energy sources（Such as hydrogen, methane, methyl alcohol）Or substitute petrochemicals（Such as ethylene raw, poly- third Alkene raw material, dimethyl ether etc.）Based on New Coal Chemical the industry development impetus it is powerful.Wherein Texaco（GE）Coal water slurry gasification skill Art is one of more successful Coal Gasification Technology of current domestic and international application, has had the applicating history of more than 30 years in China.Due to Using high-pressure gasified technique, coal is decomposed more completely, and organic concentration is relatively low in waste water, is practically free of tar and phenol, cyanide, Water quality is fairly simple, with obvious environment-friendly advantage.Refined oil in China Maoming, Zibo, Jiujiang, Nanjing, Anqing etc. after 2013 Factory has built many set GE coal hydrogen manufacturing gasification installations, and with the strict lifting of coal chemical technology environmental protection standard, its application is also more next It is more extensive.But all there is the environmental issue that water consumption is big, wastewater discharge is big in coal gasifying process.Therefore the treatment skill of waste water is studied Art can not only realize the recycling of waste water resource, saving water resource, and significant for environmental protection.

Temperature, pressure process water higher, black, solid content 10- are expelled directly out from GE gasification furnaces, wash tower bottoms 15% and dissolved with H₂S、CO₂、NH₃It is referred to as Heisui River Deng gas；Heisui River enters subsider after multistage flash evaporation, at clarification of flocculating Water outlet after reason is buck, and its solid content is further reduced, H₂S、CO₂、NH₃Reduced Deng gas content.Buck contains NH₄ ⁺- N280-400Mg/L、COD800-1200Mg/L、Ca²⁺1200-1400Mg/L、Mg²⁺100-200Mg/L.In order to reduce technique consumption Water, the buck for having nearly 3/4ths is back to use in gasification furnace again as chilled water, and the buck of remainder enters biochemical sewage Processing system.Conventional biochemical process is A/O systems at present, although GE coal hydrogen manufacturing waste water is not like the composition of lurgi gasifier technique waste water Complicated, COD is difficult to degrade, but because carbon-nitrogen ratio is low, there is biochemical system fluctuation of service, power consumption in actual process Height, sludge easily expands, total nitrogen is difficult to remove, concentration over-standard the problems such as.And Ca in waste water²⁺、Mg²⁺Far above mixing saturation 323.1Mg/L is (with CaCO for aqueous solution hardness₃Meter), so causing reuse pipeline and the serious phenomenon of waterline fouling.But it is existing Capable coal gas wastewater treatment technology, such as Chinese patent：201310220988.8、201010546162.7、 201110030443.1st, 201020679280.0, etc., for lurgi gasifier high concentrated organic wastewater, handling process is very multiple It is miscellaneous, it is unsuitable for Texaco gasifier quality problem.

Utility model content

It is simple, easily operated that the utility model aims to provide a kind of flow, can rapidly and efficiently remove waste water Ca²⁺、Mg²⁺ Ion simultaneously carries out resource reclaim, significantly improves biochemical system influent quality, improves biochemical effects, while solve processing system holding Easy fouling and fluctuation of service problem, and the precipitation for producing is with CaCO₃Based on, CaO content is higher than 52%, can be used as fabulous Construction material is reclaimed, and realizes the Texaco stove coal gas wastewater biochemical treatment system of the theory of recycling industries and clean production System.

To achieve the above object, the utility model provides following technical scheme：A kind of Texaco stove coal gas wastewater is biochemical Processing system, including Heisui River subsider, Ca²⁺、Mg²⁺Reaction settling basin, Anaerobic Treatment unit, aerobic treatment unit and second pond, The top delivery port of the Heisui River subsider connects Ca by valve on subsider²⁺、Mg²⁺Reaction settling basin, Ca²⁺、Mg²⁺Reaction The top discharge outlet of sedimentation basin connects Anaerobic Treatment unit by the first draining pump, and the discharge outlet of Anaerobic Treatment unit passes through second Draining pump connects aerobic treatment unit, and the discharge outlet of aerobic treatment unit is by the 3rd draining pump connection second pond, and second pond Top connects the water inlet of Anaerobic Treatment unit by sewage backflow pipe, and second pond bottom is connected at anaerobism by mud return line Reason unit and aerobic treatment unit；Ca²⁺、Mg²⁺The bottom connection precipitation collecting pit of reaction settling basin, precipitation collecting pit is by giving Material pump connection CaCO₃Retracting device.

As further scheme of the present utility model：The Ca²⁺、Mg²⁺Be provided with the top of reaction settling basin plus NaOH pipe and Plus Na₂CO₃Pipe.

As further scheme of the present utility model：The Ca²⁺、Mg²⁺Agitating device is provided with reaction settling basin.

As further scheme of the present utility model：The Ca²⁺、Mg²⁺The bottom of reaction settling basin connects with precipitation collecting pit The discharge line for connecing is provided with mud valve.

As further scheme of the present utility model：The water inlet of the Anaerobic Treatment unit sets acid adding pipe, top It is provided with pH detectors.

As further scheme of the present utility model：The bottom scum pipe of the Heisui River subsider is provided with subsider lower valve Door.

As further scheme of the present utility model：The mud return line connects Aerobic Process for Treatment by a return valve Unit, Anaerobic Treatment unit is connected by No. two return valves, and mud return line connects the discharge of second pond by the pipe valve that flows back Pipeline, the discharge line of second pond is provided with discharge line valve；The sewage backflow pipe is provided with sewage backflow valve.

As further scheme of the present utility model：The Anaerobic Treatment unit inlet end about pond it is long 1/5th Place sets core wall, and Anaerobic Treatment unit is divided into two ponds, and several baffle plates are being set in the pond of inlet end.

Compared with prior art, the beneficial effects of the utility model are：The Texaco stove coal gas wastewater biochemical treatment system System has advantages below：First, the Texaco gasifier coal gas ash water hardness is exceeded well over usually between 1200-1460mg/L The hardness 323.1mg/L of mixed saturated aqueous solution both at 25 DEG C is (with CaCO₃Meter), therefore feed-line fouling in production Seriously, it is very big to Influence of production.The utility model is to Ca²⁺、Mg²⁺Ion carries out precipitation process, reduces the hardness to 50- 200mg/L, controls in less scaling safe range, therefore significantly improves biochemical system influent quality, improves biochemical effects, The easy fouling of processing system and fluctuation of service are solved the problems, such as simultaneously, equipment overhaul cycle is extended about more than 6 months.

2nd, to Ca in GE gasification furnace coal gas-made technology bucks²⁺、Mg²⁺After ion carries out precipitation process, the precipitation of generation with CaCO₃Based on, CaO content is higher than 52%, can be recycled as fabulous construction material, so reduces treatment agent Cost, and Ca, Mg metals resources in waste water are reclaimed, realize the theory of recycling industries and clean production.The system stream Journey is simple, easily operated, is a kind of new Waste Water Treatment of resource reclaim type.

3rd, GE gasification furnaces coal gas wastewater NH₄ ⁺- N concentration is 280-400mg/L, and COD is 800-1200mg/L, carbon-nitrogen ratio It is low, cause biochemical system NH_3-N treating to be difficult the exceeded phenomenon of up to standard and total nitrogen serious.The system is not only greatly lowered buck Hardness, and part NH is removed simultaneously₄ ⁺- N, clearance reaches 15-30%, therefore can admirably improve waste water carbon-nitrogen ratio, after raising Continuous biochemical system NH₄ ⁺- N, TN treatment effects, reduce cost for wastewater treatment.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model；

Fig. 2 is the structural representation of Anaerobic Treatment unit of the present utility model.

Specific embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment for being obtained, belongs to the scope of the utility model protection.

Fig. 1-2 is referred to, in the utility model embodiment, a kind of Texaco stove coal gas wastewater biochemical treatment system, bag Include Heisui River subsider 1, Ca²⁺、Mg²⁺Reaction settling basin 2, Anaerobic Treatment unit 3, aerobic treatment unit 4 and second pond 5 are described black The top delivery port of water subsider 1 connects Ca by valve 6 on subsider²⁺、Mg²⁺Reaction settling basin 2, Ca²⁺、Mg²⁺Reaction precipitation The top discharge outlet in pond 2 connects Anaerobic Treatment unit 3 by the first draining pump 15, and the discharge outlet of Anaerobic Treatment unit 3 is by the Two draining pump 21 connects aerobic treatment unit 4, and the discharge outlet of aerobic treatment unit 4 connects second pond 5 by the 3rd draining pump 22, And the top of second pond 5 connects the water inlet of Anaerobic Treatment unit 3 by sewage backflow pipe 24, the bottom of second pond 5 is returned by sludge The connection Anaerobic Treatment of flow tube 26 unit 3 and aerobic treatment unit 4；Ca²⁺、Mg²⁺The bottom connection precipitation of reaction settling basin 2 is collected Pond 12, precipitation collecting pit 12 connects CaCO by feed pump 13₃Retracting device 14.

It is above-mentioned, Ca²⁺、Mg²⁺The top of reaction settling basin 2 is provided with plus NaOH pipes 9 and plus Na₂CO₃Pipe 10.

It is above-mentioned, Ca²⁺、Mg²⁺Agitating device 8 is provided with reaction settling basin 2.

It is above-mentioned, Ca²⁺、Mg²⁺The discharge line that the bottom of reaction settling basin 2 is connected with precipitation collecting pit 12 is provided with spoil disposal Valve 11.

Above-mentioned, the water inlet of Anaerobic Treatment unit 3 sets acid adding pipe 18, and top is provided with pH detectors 17.

Above-mentioned, the bottom scum pipe of Heisui River subsider 1 is provided with subsider lower valve 7.

Above-mentioned, mud return line 26 connects aerobic treatment unit 4 by a return valve 28, by No. two return valves 16 connection Anaerobic Treatment units 3, mud return line 26 connects the discharge line of second pond 5 by the pipe valve 27 that flows back, second pond 5 Discharge line is provided with discharge line valve 25；The sewage backflow pipe 24 is provided with sewage backflow valve 23.

It is above-mentioned, Anaerobic Treatment unit 3 inlet end pond it is long 1/5th at set core wall 20, by Anaerobic Treatment list Unit 3 is divided into two ponds, and several baffle plates 19 are being set in the pond of inlet end.

Design feature of the present utility model and its principle：The top water outlet of Heisui River subsider 1 enters Ca²⁺、Mg²⁺Reaction precipitation Pond 2, after a quarter for entering water and reaching reaction tank volume, turn on agitator 8 controls rotating speed for 300-350rpm, opens Plus NaOH pipes 9 to dosing is completed, while after being kept stirring for the continuation stirring of device 8 10-15min, opening plus Na₂CO₃Pipe 10 is complete to dosing Into, and be kept stirring for, after continuing to stir 20min after the completion of water inlet and dosing all, adjustment agitator speed is 200-250rpm. Go out water dissolves NaOH, Na with the downflow weir of second pond 5₂CO₃, fresh water consumption in technique can be so saved, while reducing waste water row Put total amount.After continuing to stir 20-30min, stop agitator 8 and stand.After agitator 8 stops, another Ca is opened²⁺、Mg²⁺ Reaction settling basin, is equally operated, different Ca²⁺、Mg²⁺Reaction settling basin batch (-type) alternate run, according to the water for producing Volume with reaction tank determines Ca²⁺、Mg²⁺Reaction settling basin quantity.After agitator 8 stops and stands 1.5-2h, open and Ca^{2 +}、Mg²⁺The first connected draining pump 15 of the top discharge outlet of reaction settling basin 2, after the first draining pump 15 is precipitated waste water with come from The water inlet of anaerobic reaction unit 3 is discharged into after the backflow sewage mixing of sewage backflow pipe 24, by acid adding pipe 18, pH detectors 17 After completing the process of acid adding regulation, rear pH value of waste water is sufficiently mixed by baffling section and reaches 8.5 or so into anaerobic reaction unit 3 Anaerobic sludge processing section, hydraulic detention time 3.5-4.5h.The discharge outlet water outlet of Anaerobic Treatment unit 3 enters aerobic treatment unit 4, dissolved oxygen concentration is 2.5-3.0Mg/L, and after aerobic sludge treatment 4-5h, water outlet enters second pond 5, the downflow weir of second pond 5 Water part is discharged, and a part is back to the water inlet of Anaerobic Treatment unit 3 by sewage backflow pipe 24, and this reflux type rises Ca is reduced to dilution²⁺、Mg²⁺The effect of the water outlet pH value of reaction settling basin 2, can be greatly decreased the regulation inlet flow-patterm of Anaerobic Treatment unit 3 Sour dosage needed for value, reflux ratio 2 is controlled by valve 23:1-5:1.The residual active sludge that sedimentation basin 5 is produced passes through sludge Return duct 26 and discharge line valve 25, the backflow return valve 16 of return valve 28, of pipe valve 27, are controlled, and a part is returned To Anaerobic Treatment unit 3, a part returns to aerobic treatment unit 4, to supplement the sludge of loss, while department of biochemistry is greatly reduced The sludge discharge of system.

In above-mentioned, the bottom precipitation of Heisui River subsider 1 is that thick slag is arranged by the way that subsider lower valve 7 is outer.

In above-mentioned, in Ca²⁺、Mg²⁺The top of reaction settling basin 2 sets and adds NaOH pipes 9, adds Na₂CO₃Pipe 10, described NaOH For chemistry is pure, analyze pure or industrial NaOH, added after being configured to saturated solution or any concentration, the control of NaOH additions with Ca in buck²⁺、Mg²⁺The mol ratio of ion is 0.85 ﹕ 1-1.15 ﹕ 1, described NaCO₃For chemistry is pure, it is pure or industrial to analyze Na₂CO₃, saturated solution or any concentration can be configured to or direct solid mode is added, Na₂CO₃Addition control with ash Ca in water²⁺、Mg²⁺The mol ratio of ion is 0.85 ﹕ 1-1.2 ﹕ 1.NaOH and Na₂CO₃With Ca in buck²⁺、Mg²⁺Ion is in stirring Under the conditions of fully react, generate CaCO₃、MgCO₃、Mg(OH)₂Etc. the precipitation of form.Simultaneously because NaOH and Na₂CO₃Make after addition Solution ph is raised, and generally pH value is 9.6-10.0 after reaction terminates, so causing NH in buck under stirring condition₄ ⁺- N is by part Removal, its clearance is 15-30%.

In above-mentioned, work as Ca²⁺、Mg²⁺After reaction settling basin 2 racks up waste water, after opening bottom precipitation outlet valve 11, sink Form sediment and enter precipitation collecting pit 12, CaCO is entered by feed pump 13₃Retracting device 14, described CaCO₃Retracting device 14 includes one Cutting can make CaCO₃The equipment of drying and dehydrating.Because Texaco gasifier coal gasification procedure decomposition is more complete, the content of organic matter It is low, by after the precipitation of Heisui River subsider 1, water quality is more as clear as crystal, and SS is only 20-60Mg/L, therefore Ca²⁺、Mg²⁺Reaction is heavy What shallow lake pond 2 produced is precipitated as white.The precipitation for obtaining is with CaCO₃It is main component, its CaO content is higher than 52%, can be used as fabulous Construction material recycled, reduce cost for wastewater treatment.

In above-mentioned, Ca²⁺、Mg²⁺Reaction settling basin 2 is intermittent operation, is held according to actual aquifer yield and reactor in production Product, more than configuration 2-4 platforms.

In above-mentioned, Anaerobic Treatment unit 3 inlet end about pond it is long 1/5th at set core wall 20, at anaerobism Reason unit 3 is divided into two ponds, and baffle plate 19 is set in the pond of inlet end, runs current baffling, plays and fully mixes water The effect of stream.

In above-mentioned, a part of water outlet of the downflow weir of second pond 5 is back to Anaerobic Treatment unit 3 and enters into sewage backflow pipe 24 At the mouth of a river, with Ca²⁺、Mg²⁺The water mixing of reaction settling basin 2, this reflux type plays dilution and reduces Anaerobic Treatment unit 3 The effect of pH value of intaking, the sour dosage needed for regulation water inlet pH value can be greatly decreased, makes the acid adding amount of Anaerobic Treatment unit 3 only need The 1/6-1/11 of theoretical dosage.

Application examples one：

It is implementation with China Petroleum ＆ Chemical Co., Ltd. Maoming Branch's Texaco gasifier coal process for making hydrogen waste water Object, contains Ca in the waste water after being precipitated through Heisui River subsider²⁺1200mg/L、Mg²⁺140mg/L、NH₄ ⁺- N320.7mg/L, COD1023.2mg/L, SS are 26mg/L, pH value 8.34, and Heisui River subsider water outlet enters Ca²⁺、Mg²⁺Reaction settling basin, is entering water After amount reaches a quarter of pond body product, agitator in pond is opened, controls rotating speed for 300-350rpm, and opened plus NaOH pipes, Dosing is completed after about 10min, NaOH and Ca²⁺Ion molar concentration rate is 0.85:1, after continuing to stir 15-20min, open and add Na₂CO₃Pipe, dosing is completed after about 10min, Na₂CO₃With Ca²⁺Ion molar concentration rate is 0.85:1.For dissolve NaOH, Na₂CO₃The aqueous solvent water outlet of second pond downflow weir, can so save fresh water consumption in technique, at the same reduce discharge of wastewater Total amount.After continuing to stir 20min after the completion of water inlet and dosing all, adjustment agitator speed is 150-200rpm, continues to stir 20-30min.Open another Ca simultaneously²⁺、Mg²⁺Reaction settling basin, is equally operated.In Ca²⁺、Mg²⁺Reaction settling basin stops After only stirring and standing 2h, the draining pump that unlatching is connected with its top discharge outlet is entered the waste water after precipitation by draining pump In Anaerobic Treatment unit, it is to effluent monitoring index now：Hardness is 131mg/L, NH₄ ⁺- N267.9mg/L, COD998.6mg/ L, pH value 9.89, therefore by Ca in buck after precipitation²⁺、Mg²⁺Ion is significantly removed, and strong basicity and stirring bar NH in buck is caused under part₄ ⁺- N is partially removed, and clearance reaches 16.5%, and water quality is significantly improved.

When waste water enters Anaerobic Treatment unit, mix with the recirculation water from second pond, pH value of waste water is significantly reduced, under PH8.71 is dropped to, the sour dosage needed for regulation water inlet pH value or need not be so greatly decreased.Hydrochloric acid is added by acid adding pipe, by In the effect of Anaerobic Treatment unit Internal baffle, hydrochloric acid is fully mixed with waste water, and anaerobic sludge processing unit is entered by baffle section Point, after stopping 3.5h, aerobic treatment unit is entered by discharge outlet.In aerobic treatment unit, dissolved oxygen 3.0Mg/L is controlled, this Activated sludge process is used in experiment, MLSS is 2790Mg/L, after aerobic treatment unit is stopped 4 hours, water outlet enters second pond, After hydraulic detention time is about 3h in the second pond, a downflow weir water outlet part is back to anaerobic reation pool, and reflux ratio is 2.5: 1, arranged outside remainder, be to effluent monitoring index now：NH₄ ⁺- N12.5mg/L, COD92.1mg/L, pH value 7.43, reach Coking chemistry emission of industrial pollutants standard（GB16171-2012）».Due to waste water NH₄ ⁺- N is pre-processed, then remove waste water TN Except rate is also improved 3-5%, processing cost is reduced.

In Ca²⁺、Mg²⁺In reaction settling basin, after waste water is racked up, bottom precipitation floss hole valve is opened, precipitation enters Precipitation collecting pit, CaCO is entered by feed pump₃Retracting device obtains white precipitate.CaO content is higher than 52% after measured, can be made For fabulous construction material is reclaimed, therefore realize the theory of recycling industries and clean production.Another kind of precipitation is that Heisui River sinks The thick slag that drop groove is produced, in entering filter to material pond after trench bottom collection, then is pumped into thick slag filtering by filter feed Filtered in machine, last thick slag carries out outer row.

The system flow is simple, easily operated, is a kind of rapidly and efficiently removal waste water Ca²⁺、Mg²⁺Ion simultaneously carries out resource The new Waste Water Treatment for reclaiming, while removing part NH in buck₄ ⁺- N, and clearance reaches 15-30%, therefore can be fabulous Ground improves subsequent biochemical system NH₄ ⁺- N treatment effects, make total nitrogen emission reduction improve more than 3-5%, equipment overhaul cycle is extended about 6 More than individual month, realize the theory of recycling industries and clean production.

Application examples two：

With China Petroleum ＆ Chemical Co., Ltd. Maoming Branch's Texaco gasifier as objective for implementation, settled through Heisui River Contain Ca in buck after groove precipitation²⁺1170mg/L、Mg²⁺121.5mg/L、NH₄ ⁺- N238.6mg/L, COD972.6mg/L, SS are 60mg/L, pH value 8.13, Heisui River subsider water outlet enter Ca²⁺、Mg²⁺Reaction settling basin, is entering four points that water reaches pond body product One of after, open agitator in pond, control rotating speed for 300-350rpm, and open plus NaOH pipes, dosing completion after about 10min, NaOH and Ca²⁺Ion molar concentration rate is 1:1, after continuing to stir 15-20min, open plus Na₂CO₃Pipe, dosing after about 10min Complete, Na₂CO₃With Ca²⁺Ion molar concentration rate is 1:1.For dissolving NaOH, Na₂CO₃Aqueous solvent second pond downflow weir Water outlet, can so save fresh water consumption in technique, at the same reduce wastewater emission amount.After the completion of water inlet and dosing all after After continuous stirring 20min, adjustment agitator speed is 150-200rpm, continues to stir 20-30min.Open another Ca simultaneously²⁺、 Mg²⁺Reaction settling basin, is equally operated.In Ca²⁺、Mg²⁺After reaction settling basin stops stirring and standing 2h, open with thereon The connected draining pump of portion's discharge outlet, is entered in Anaerobic Treatment unit the waste water after precipitation by draining pump, and now waste water is supervised Surveying index is：NH₄ ⁺- N193.5mg/L, hardness are 86.3mg/L, COD904.5mg/L, pH value 9.78, therefore anti-by precipitation Ca in waste water after answering²⁺、Mg²⁺Ion is significantly removed, and NH₄ ⁺- N clearances reach 18.9%, and water quality is significantly improved.

When waste water enters Anaerobic Treatment unit, mix with the recirculation water from second pond, pH value of waste water is significantly reduced, under PH8.65 is dropped to, the sour dosage needed for regulation water inlet pH value or need not be so greatly decreased.Hydrochloric acid is added by acid adding pipe, by In the effect of Anaerobic Treatment unit Internal baffle, after hydrochloric acid is fully mixed with waste water, by baffle section into anaerobic sludge treatment Part, after stopping 3.5h, aerobic treatment unit is entered by discharge outlet.In aerobic treatment unit, dissolved oxygen 3.0mg/L is controlled, Activated sludge process is used in this experiment, MLSS is 2800-3100mg/L, after aerobic treatment unit is stopped 4 hours, water outlet is entered Second pond, after hydraulic detention time is about 2-3h in the second pond, a downflow weir water outlet part is back to anaerobic reation pool, backflow Than being 2.5:1, arranged outside remainder, be to effluent monitoring index now：NH₄ ⁺- N8.2mg/L, COD81.5mg/L, pH value 7.66, reach coking chemistry emission of industrial pollutants standard（GB16171-2012）».Due to waste water NH₄ ⁺- N is pre-processed, and is made TN clearances improve more than 3-5%, reduce processing cost.

In Ca²⁺、Mg²⁺In reaction settling basin, after waste water is racked up, bottom precipitation floss hole valve is opened, precipitation enters Precipitation collecting pit, CaCO is entered by feed pump₃Retracting device obtains white precipitate.CaO content is higher than 52% after measured, can be made For fabulous construction material is reclaimed, therefore realize the theory of recycling industries and clean production.Another kind of precipitation is that Heisui River sinks The thick slag that drop groove is produced, in entering filter to material pond after trench bottom collection, then is pumped into thick slag filtering by filter feed Filtered in machine, last thick slag carries out outer row.

The system flow is simple, easily operated, is a kind of rapidly and efficiently removal waste water Ca²⁺、Mg²⁺Ion simultaneously carries out resource The new Waste Water Treatment for reclaiming, while removing part NH in buck₄ ⁺- N, and clearance reaches 15-30%, therefore can be fabulous Ground improves subsequent biochemical system NH₄ ⁺- N treatment effects, make total nitrogen emission reduction improve more than 3-5%, equipment overhaul cycle is extended about 6 More than individual month, realize the theory of recycling industries and clean production.

It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and And in the case of without departing substantially from spirit or essential attributes of the present utility model, can in other specific forms realize that this practicality is new Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation Involved claim.

Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each implementation method is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should Specification an as entirety, the technical scheme in each embodiment can also be formed into those skilled in the art through appropriately combined May be appreciated other embodiment.

Claims (8)

1. a kind of Texaco stove coal gas wastewater biochemical treatment system, including Heisui River subsider, Ca²⁺、Mg²⁺Reaction settling basin, detest Oxygen processing unit, aerobic treatment unit and second pond, it is characterised in that the top delivery port of the Heisui River subsider is by sedimentation Valve connection Ca on groove²⁺、Mg²⁺Reaction settling basin, Ca²⁺、Mg²⁺The top discharge outlet of reaction settling basin is connected by the first draining pump Anaerobic Treatment unit is connect, the discharge outlet of Anaerobic Treatment unit connects oxygen processing unit, Aerobic Process for Treatment list by the second draining pump The discharge outlet of unit connects second pond by the 3rd draining pump, and second pond top connects Anaerobic Treatment unit by sewage backflow pipe Water inlet, second pond bottom by mud return line connect Anaerobic Treatment unit and aerobic treatment unit；Ca²⁺、Mg²⁺Reaction The bottom connection precipitation collecting pit of sedimentation basin, precipitation collecting pit connects CaCO by feed pump₃Retracting device.

2. a kind of Texaco stove coal gas wastewater biochemical treatment system according to claim 1, it is characterised in that the Ca^{2 +}、Mg²⁺It is provided with the top of reaction settling basin plus NaOH pipes and plus Na₂CO₃Pipe.

3. a kind of Texaco stove coal gas wastewater biochemical treatment system according to claim 1, it is characterised in that the Ca^{2 +}、Mg²⁺Agitating device is provided with reaction settling basin.

4. a kind of Texaco stove coal gas wastewater biochemical treatment system according to claim 1, it is characterised in that the Ca^{2 +}、Mg²⁺The discharge line that the bottom of reaction settling basin is connected with precipitation collecting pit is provided with mud valve.

5. a kind of Texaco stove coal gas wastewater biochemical treatment system according to claim 1, it is characterised in that described to detest The water inlet of oxygen processing unit sets acid adding pipe, and top is provided with pH detectors.

6. a kind of Texaco stove coal gas wastewater biochemical treatment system according to claim 1, it is characterised in that described black The bottom scum pipe of water subsider is provided with subsider lower valve.

7. a kind of Texaco stove coal gas wastewater biochemical treatment system according to claim 1, it is characterised in that the dirt Mud return duct connects aerobic treatment unit by a return valve, and Anaerobic Treatment unit is connected by No. two return valves, dirty Mud return duct connects the discharge line of second pond by the pipe valve that flows back, and the discharge line of second pond is provided with discharge line valve；Institute State sewage backflow pipe and be provided with sewage backflow valve.

8. a kind of Texaco stove coal gas wastewater biochemical treatment system according to claim 1, it is characterised in that described to detest Oxygen processing unit inlet end about pond it is long 1/5th at set core wall, Anaerobic Treatment unit is divided into two ponds, Several baffle plates are being set in the pond of inlet end.