CN105000745B - A kind of sulfur Gas Fields produced water treatment system - Google Patents

A kind of sulfur Gas Fields produced water treatment system Download PDF

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Publication number
CN105000745B
CN105000745B CN201510553356.2A CN201510553356A CN105000745B CN 105000745 B CN105000745 B CN 105000745B CN 201510553356 A CN201510553356 A CN 201510553356A CN 105000745 B CN105000745 B CN 105000745B
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stripping
pipeline
gas
water
tank
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CN105000745A (en
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王敏
曾向东
刘真凯
李硕
王光明
祈建翔
周小舟
张洁
张哲玮
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China Petroleum and Chemical Corp
Sinopec Southwest Oil and Gas Co
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China Petroleum and Chemical Corp
Sinopec Southwest Oil and Gas Co
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Abstract

The invention discloses a kind of sulfur Gas Fields produced water treatment system,Including natural gas stripper、Integrated hydrogen sulfide stripping device、Air sweetening tower、Preevaporator、Ammonia nitrogen blowing-off device、Multi-effect evaporator、Electrolysis-catalytic oxidation device and crystallizer,The natural gas stripper is connected on hydrogen sulfide stripping device by pipeline,The integrated hydrogen sulfide stripping device is connected with air sweetening tower by pipeline,The integrated hydrogen sulfide stripping device is connected with preevaporator by pipeline,The preevaporator is connected with multi-effect evaporator by pipeline,The preevaporator is connected with ammonia nitrogen blowing-off device by pipeline,The multi-effect evaporator is connected with electrolysis-catalytic oxidation device by pipeline,The multi-effect evaporator is connected with crystallizer by pipeline,The crystallizer is connected with electrolysis-catalytic oxidation device by pipeline,The electrolysis-catalytic oxidation device is connected with integrated hydrogen sulfide stripping device by pipeline.The present invention can reclaim the most of material in sulfur Gas Fields recovered water comprehensively, realize zero-emission, do not pollute the environment of surrounding.

Description

A kind of sulfur Gas Fields produced water treatment system
Technical field
The invention belongs to the stratum recovered water taken out of in natural gas extraction field, more particularly to sulfur Gas Fields recovery process Processing system.
Background technology
Sulfur Gas Fields can produce the recovered water for taking stratum out of during exploitation.The recovered water of sulfur Gas Fields is main at present Using technology be re-injection after pretreatment, but reinjection technology mode has certain limitation, the gas field extraction in not all area Water is suitable for the method process, such as Sichuan Basin western sichuan region, as stratum is fine and close and complicated hydrogeological conditions, recovered water Re-injection be extremely restricted.Need to add a large amount of chemical oxidation medicaments and flocculant in re-injection preprocessing process, not only cost Very high, the oxidant of addition usually contains heavy metal, causes the increase of sewage and Heavy Metal Level In Sludge, it is often more important that no The resource of waste water can be realized, in addition re-injection process, if Project Realization is bad, easily cause underground water pollution, some local rings Guarantor department has forbidden the non-same layer re-injection of sewage.
Publication No. CN103214139A, publication date are that the Chinese invention patent application on July 24th, 2013 discloses one Gas production wastewater comprehensive treatment technology is planted, hydrogen sulfide, evil that existing waste water treatment process thoroughly cannot be removed in gas production waste water is solved It is smelly, and the problem that the utilization of resources cannot be realized.The present invention includes following handling process:Desulfurizing and purifying pretreatment, four-effect evaporation Crystallization treatment, tail gas deodorize are processed.By three waste water treatment process, the high saliferous of high sulfur-bearing for solving presently, there are contains Organic substance Gas production waste water process up to standard, and the invention processing technological flow is rationally, and compact equipment installation, floor space are little, it is convenient with Other process matchings are used;Investment cost is few, operating cost is low, comprehensive energy consumption is low in addition, and environmental benefit and social benefit are obvious Better than other technical schemes.The method is first to use chemical oxidization method desulfurization, then by multiple-effect evaporation salt manufacturing, only to nothing in waste water Machine salt is recycled, and hydrogen sulfide in waste water is not recycled, and is still adopted and is added a large amount of chemical agents Method is processed.Technique does not have the treatment technology of mother solution in evaporation process, does not carry out advanced treating to distilled water, and waste water is still Recycling cannot be realized.
Publication No. CN103304104A, publication date are that in September, 2013 Chinese invention patent application of 18 days discloses one The novel process of natural gas field production waste water zero-emission is planted, is comprised the steps:Sewage in gas field is divided into into normal life Sewage, sanitary sewage, maintenance sewage, accident waste liquid, rainwater, production waste water and gas water are produced, is collected respectively;Then will Normal production waste, sanitary sewage, maintenance sewage, accident waste liquid and early-stage rainwater introduce biochemical treatment unit, and production waste water draws Enter electrodialysis process unit, gas water introduces gas water pretreatment unit;Complete up to standard of non-reuse after biochemical treatment cell processing Gas water after concentrated water and gas water pretreatment unit produced by after sewage, electrodialysis process cell processing is processed is entered Evaporative crystallization unit carries out advanced treating, and reuse after water quality reaching standard is that recirculated cooling water supplements other production use in water or gas field Water, pollutant are separated out in the form of crystal salt from sewage, carry out landfill stabilization or recycling to crystal salt, final to realize dirt Water zero discharge.The patent application is not directed to the process of sour gas water in field, is only applicable to non-sour gas water in field, does not also have in the patent The processing method of evaporation mother solution, the processing method of the ammonia nitrogen contained in not having gas production waste water, the patent are given up to the gas production containing ammonia nitrogen Water is difficult to realize zero-emission.
The content of the invention
In order to overcome the process that the above-mentioned existing method for processing sulfur Gas Fields recovered water is present not comprehensive, it is impossible to realize extraction Water is comprehensively recyled and zero-emission, the invention provides a kind of sulfur Gas Fields produced water treatment system, by the handling process Effect, the most of material in sulfur Gas Fields recovered water can be reclaimed comprehensively, zero-emission is realized, the environment of surrounding is not polluted.
The present invention for the solution technical scheme that adopts of above-mentioned technical problem is:
A kind of sulfur Gas Fields produced water treatment system, it is characterised in that:Blow including natural gas stripper, integrated hydrogen sulfide De- device, air sweetening tower, preevaporator, ammonia nitrogen blowing-off device, multi-effect evaporator, electrolysis-catalytic oxidation device and crystallizer, The natural gas stripper is connected on hydrogen sulfide stripping device by pipeline, and the integrated hydrogen sulfide stripping device is by pipe Road is connected with air sweetening tower, and the integrated hydrogen sulfide stripping device is connected with preevaporator by pipeline, the prevapourising Device is connected with multi-effect evaporator by pipeline, and the preevaporator is connected with ammonia nitrogen blowing-off device by pipeline, and the multiple-effect is steamed Send out device to be connected with electrolysis-catalytic oxidation device by pipeline, the multi-effect evaporator is connected with crystallizer by pipeline, the knot Brilliant device is connected with electrolysis-catalytic oxidation device by pipeline, and the electrolysis-catalytic oxidation device passes through pipeline and integrated hydrogen sulfide Stripping device is connected.
A kind of sulfur Gas Fields produced water treatment system, also including integrated coagulation and filtration device, integrated coagulation mistake Filter device is connected on the pipeline between integrated hydrogen sulfide stripping device and preevaporator.
The ammonia nitrogen blowing-off device includes stripping tank, exhaust-gas treatment tank and pump, is provided with air inlet pipe, enters on the stripping tank Water pipe, evacuated tube and outlet pipe, the air inlet pipe are located between water inlet pipe and outlet pipe, and water inlet pipe is located at below outlet pipe, institute State and in stripping tank, be provided with aeration head, aeration head is connected with air inlet pipe, the stripping pot bottom arranges having heaters, the stripping Tank top is provided with discharge, and the other end of discharge is located in exhaust-gas treatment tank, and the water inlet of the pump is connected at waste gas The bottom of reason tank, the outlet of the pump are connected with water pipe, and the other end of water pipe is connected with water-locator, and water-locator is located at waste gas In the top of reason tank.
Sight glass and glass-tube liquid level are additionally provided with the stripping tank, sight glass is arranged on the medium position of stripping tank, glass Pipe liquid level bottom extend into the bottom position of stripping tank, and the tip position of stripping tank is extend at the top of glass-tube liquid level.
The stripping tank is provided with heat-insulation layer.
Two porous plates are provided with the exhaust-gas treatment tank, filler between two porous plates, is filled with.
The electrolysis-catalytic oxidation device includes DC source, electrode and cell reaction groove, and electrode is inserted into cell reaction In groove, DC source is connected with electrode, and cell reaction groove is used to load mother solution, cell reaction groove be provided with gas outlet, inlet, Sodium hypochlorite is exported and liquid outlet, and gas outlet is arranged at the top of cell reaction groove, and liquid outlet is arranged on cell reaction trench bottom, secondary Sodium chlorate outlet is arranged on cell reaction groove side.
The integrated hydrogen sulfide stripping device is identical with the structure of the stripping tank of ammonia nitrogen blowing-off device, and which includes blowing De- tank, is provided with air inlet pipe, water inlet pipe, evacuated tube and outlet pipe on stripping tank, and the air inlet pipe is located at water inlet pipe and water outlet Between pipe, water inlet pipe is located at below outlet pipe, is provided with aeration head in the stripping tank, and aeration head is connected with air inlet pipe, described Stripping pot bottom arranges having heaters, and the stripping tank top is provided with discharge, and the other end of discharge is connected to air and takes off On sulfur tower.
Sulfur Gas Fields recovered water is passed through in natural gas stripper, is then passed through natural gas toward natural gas stripper, natural The intake of gas is 60~100 times that sulfur Gas Fields produce the water yield, and it is former that the gas after stripping imports to Gas Purification Factory low pressure Material gas pipeline carries out desulfurization process, generates the sulfur product of high added value, and the liquid after stripping imports to integrated hydrogen sulfide and blows Hydrogen sulfide stripping process is carried out in de- device, the gas of generation adds desulfurizing agent that list is obtained through the effect of air sweetening tower again Matter sulfur, and hydrogen sulfide is transformed into elemental sulfur or sulfide precipitation in remaining liquid, Jing is filtered and elemental sulfur and sulfuration is obtained The regenerant of thing, the air capacity for being passed through integrated hydrogen sulfide stripping device is 600~1000 times of the amount of liquid being passed through;It is remaining Liquid carries out prevapourising in being passed into preevaporator, the temperature of prevapourising is 110~115 DEG C, when remaining liquid prevapourising amount During to 20%~300%, multiple-effect evaporation in being transferred to multi-effect evaporator, is carried out, the temperature of multiple-effect evaporation is 90 DEG C~110 DEG C, pre- to steam Ammonia-nitrogen desorption is carried out during ammonia nitrogen blowing-off device is passed in sending out the distilled water for producing, stripping ammonia nitrogen out is absorbed with dilute sulfuric acid, Generate ammonium sulfate, and the distilled water after the distilled water and multiple-effect evaporation after stripping can reuse, multiple-effect evaporation produce mother solution import Integrated hydrogen sulfide stripping device is back to after catalytic and oxidative electrolysis technology process is carried out to electrolysis-catalytic oxidation device carries out hydrogen sulfide Stripping process, the usage amount that can thus reduce air and the discharge capacity for reducing these oxidants, the salt that multiple-effect evaporation is obtained Slurry crystallizes out Nacl through drying crystalline, and remaining liquid is mother solution, imports to electrolysis-catalytic oxidation device and carries out electrolysis and urges Change oxidation.The real purpose for reaching pollution-free zero-emission, and omnibearing recovery has been carried out to the material in recovered water Utilize.
The present invention principle be:Sulfur Gas Fields waste water obtains sulfur product, liquid Jing through stripping process after gas treatment Cross air stripping process and obtain elemental sulfur, after the two step process, the sulfur in waste water is removed, and changes into industry Product;Again through prevapourising after sulphur removal, the distilled water of generation can just remove the ammonia nitrogen in waste water, use through ammonia-nitrogen desorption process Dilute sulfuric acid obtains ammonium sulfate after absorbing, and does not only pollute the environment, moreover it is possible to obtain industrial products;The mother solution Jing that multiple-effect evaporation is produced Cross and flow back after catalytic and oxidative electrolysis technology is processed in second step, it is possible to reduce the intake of air, help hydrogen sulfide stripping, rationally utilize Mother solution, the mother solution after hydrogen sulfide stripping carry out prevapourising, multiple-effect evaporation and catalytic and oxidative electrolysis technology again, under so circulating Go, effective process has been carried out to mother solution, it is not necessary to discharge mother solution pollution environment;And through ammonia-nitrogen desorption process after distilled water and Distilled water after multiple-effect evaporation supplements Water circulation as recirculated cooling water, and this has just reached the purpose for recycling, generation it is useless Water is few, and the water of consumption is few, has reached the purpose of energy-saving and emission-reduction.
Compared with prior art, the invention has the advantages that:
Non-wastewater discharge of the present invention, reduces the harm to environment;Compared with existing produced-water reinjection technology, this method is by water In hydrogen sulfide become sulfur product, ammonia nitrogen becomes ammonium sulfate fertilizer, inorganic salt and becomes Nacl, water and becomes to loop back With water, realize that waste water reclamation utilizes resource;This method does not add a large amount of chemical oxidizing agents, reduces the harm to environment, Avoid some introducings containing heavy metal desulfurizing agent.
Then the present invention is removed by air stripping sulphur removal method by removing the partial vulcanization hydrogen in sulfur Gas Fields recovered water Hydrogen sulfide in recovered water is all processed by the hydrogen sulfide in liquid by this two effect, then by prevapourising and Inorganic salt in liquid is reclaimed by the effect of multiple-effect evaporation, while ammonia-nitrogen desorption process is carried out to distilled water, is removed ammonia nitrogen, and is returned Receive as ammonium sulfate, and the oxidant such as chlorine, chlorine dioxide and sodium hypochlorite that mother solution is produced after oxidation processes is drawn Enter in integrated hydrogen sulfide stripping device to realize the oxidation processes of hydrogen sulfide, reduce stripping air consumption, realize " with useless Control useless ".The discharge of chlorine, chlorine dioxide and sodium hypochlorite is it also avoid simultaneously, is back to through the mother solution of oxidation processes again many Multiple-effect evaporation is carried out in effect vaporizer, inorganic salt is crystallized out, by these process, distilled water can be recycled, be basically reached Comprehensively recyling for material in recovered water, has reached the purpose of zero-emission, will not produce pollution to surrounding.
Sodium hydroxide and sodium carbonate are added in the liquid after second step, after removing the calcium and magnesium and float in liquid The 3rd step is carried out again.Its objective is, the calcium and magnesium and float that remove in liquid prevent from fouling being produced in prevapourising and multiple-effect evaporation Pollution preevaporator and multi-effect evaporator.
Description of the drawings
Fig. 1 is overall structure diagram of the present invention;
Fig. 2 is principle of the invention block diagram;
Fig. 3 is ammonia nitrogen blowing-off device structural representation of the present invention;
Fig. 4 is electrolysis-catalytic oxidation device structural representation of the present invention.
Labelling in figure:1st, DC source, 2, electrode, 3, cell reaction groove, 4, gas outlet, 5, inlet, 6, sodium hypochlorite Outlet, 7, liquid outlet, 8, stripping tank, 9, exhaust-gas treatment tank, 10, pump, 11, air inlet pipe, 12, water inlet pipe, 13, evacuated tube, 14, go out Water pipe, 15, aeration head, 16, discharge, 17, heater, 18, water pipe, 19, water-locator, 20, sight glass, 21, glass-tube liquid level, 22nd, heat-insulation layer, 23, porous plate, 24, filler, 25, natural gas stripper, 26, integrated hydrogen sulfide stripping device, 27, air takes off Sulfur tower, 28, preevaporator, 29, ammonia nitrogen blowing-off device, 30, multi-effect evaporator, 31, electrolysis-catalytic oxidation device, 32, crystallizer, 33rd, integrated coagulation and filtration device.
Specific embodiment
With reference to embodiment, the invention will be further described, and described embodiment is only a present invention part Embodiment, is not whole embodiments.Based on the embodiment in the present invention, one of ordinary skill in the art is not making Obtained under the premise of creative work other used by embodiment, belong to protection scope of the present invention.
Embodiment 1
A kind of sulfur Gas Fields produced water treatment system, it is characterised in that:Including natural gas stripper 25, integrated hydrogen sulfide Stripping device 26, air sweetening tower 27, preevaporator 28, ammonia nitrogen blowing-off device 29, multi-effect evaporator 30, catalytic and oxidative electrolysis technology dress 31 and crystallizer 32 are put, the natural gas stripper 25 is connected on integrated hydrogen sulfide stripping device 26 by pipeline, described Integrated hydrogen sulfide stripping device 26 is connected with air sweetening tower 27 by pipeline, and the integrated hydrogen sulfide stripping device 26 leads to Piping is connected with preevaporator 28, and the preevaporator 28 is connected with multi-effect evaporator 30 by pipeline, the preevaporator 28 are connected with ammonia nitrogen blowing-off device 29 by pipeline, and the multi-effect evaporator 30 passes through pipeline and 31 phase of electrolysis-catalytic oxidation device Even, the multi-effect evaporator 30 is connected with crystallizer 32 by pipeline, and the crystallizer 32 passes through pipeline and catalytic and oxidative electrolysis technology Device 31 is connected, and the electrolysis-catalytic oxidation device 31 is connected with integrated hydrogen sulfide stripping device 26 by pipeline.
Sulfur Gas Fields recovered water is passed through in natural gas stripper, is then passed through natural gas toward natural gas stripper, natural 60 times for sulfur Gas Fields recovered water of the intake of gas, the gas after stripping imports to Gas Purification Factory pressure feed gas pipeline Desulfurization process are carried out, the sulfur product of high added value is generated, the liquid after stripping is imported in integrated hydrogen sulfide stripping device Hydrogen sulfide stripping process is carried out, the gas of generation adds desulfurizing agent that elemental sulfur is obtained through the effect of air sweetening tower again, and In remaining liquid, hydrogen sulfide is transformed into elemental sulfur or sulfide precipitation, and Jing filters the recovery that elemental sulfur and sulfide is obtained Thing, the air capacity for being passed through integrated hydrogen sulfide stripping device is 600 times of the amount of liquid being passed through;Remaining liquid is passed into pre- steaming Prevapourising is carried out in sending out device, the temperature of prevapourising is 100 DEG C, when remaining liquid prevapourising amount is to 30%, be transferred to multiple-effect steaming Multiple-effect evaporation is carried out in sending out device, the temperature of multiple-effect evaporation is 110 DEG C, and ammonia-nitrogen desorption dress is passed in the distilled water that prevapourising is produced Ammonia-nitrogen desorption is carried out in putting, stripping ammonia nitrogen out is absorbed with dilute sulfuric acid, generation ammonium sulfate, and the distilled water and multiple-effect after stripping Distilled water after evaporation can reuse, and the mother solution for producing is imported to after electrolysis-catalytic oxidation device carries out catalytic and oxidative electrolysis technology process Being back to integrated hydrogen sulfide stripping device carries out hydrogen sulfide stripping process, can thus reduce usage amount and the reduction of air The discharge capacity of these oxidants, the salt slurry that multiple-effect evaporation is obtained crystallize out Nacl through drying crystalline, and remaining liquid is mother Liquid, importing to electrolysis-catalytic oxidation device carries out catalytic and oxidative electrolysis technology.The real purpose for reaching pollution-free zero-emission, and Omnibearing recycling has been carried out to the material in recovered water.
The ammonia nitrogen blowing-off device that the present embodiment is mentioned includes stripping tank 8, exhaust-gas treatment tank 9 and pump 10, on the stripping tank 8 Air inlet pipe 11, water inlet pipe 12, evacuated tube 13 and outlet pipe 14 are provided with, the air inlet pipe 11 is located at water inlet pipe 12 and outlet pipe 14 Between, water inlet pipe 12 is located at below outlet pipe 14, and aeration head 15, aeration head 15 and air inlet pipe 11 are provided with the stripping tank 8 Be connected, 8 bottom of stripping tank arranges having heaters 17, at the top of the stripping tank 8, be provided with discharge 16, discharge 16 it is another One end is located in exhaust-gas treatment tank 9, and the water inlet of the pump 10 is connected to the bottom of exhaust-gas treatment tank 9, the water outlet of the pump 10 Mouth is connected with water pipe 18, and the other end of water pipe 18 is connected with water-locator 19, and water-locator 19 is located in the top of exhaust-gas treatment tank 9.
Sight glass 20 and glass-tube liquid level 21 are additionally provided with the stripping tank 8, sight glass 20 is arranged on the middle part of stripping tank 8 Position, 21 bottom of glass-tube liquid level extend into the bottom position of stripping tank 8, and the top of stripping tank 8 is extend at the top of glass-tube liquid level 21 Position.
The stripping tank 8 is provided with heat-insulation layer 22.
Two porous plates 23 are provided with the exhaust-gas treatment tank 9, filler 24 between two porous plates 23, is filled with.
The integrated hydrogen sulfide stripping device of the present embodiment is identical with the structure of the stripping tank of ammonia nitrogen blowing-off device, its Including stripping tank, air inlet pipe, water inlet pipe, evacuated tube and outlet pipe are provided with stripping tank, the air inlet pipe is located at water inlet pipe And outlet pipe between, water inlet pipe is located at below outlet pipe, and aeration head, aeration head and air inlet pipe phase are provided with the stripping tank Even, the stripping pot bottom arranges having heaters, and the stripping tank top is provided with discharge, and the other end of discharge is connected to On air sweetening tower.
The electrolysis-catalytic oxidation device mentioned in the present embodiment includes DC source 1, electrode 2 and cell reaction groove 3, electricity Pole 2 is inserted in cell reaction groove 3, and DC source 1 is connected with electrode 2, and cell reaction groove 3 is used to load mother solution, cell reaction Groove 3 is provided with gas outlet 4, inlet 5, sodium hypochlorite outlet 6 and liquid outlet 7, and gas outlet 4 is arranged at the top of cell reaction groove 3, Liquid outlet 7 is arranged on 3 bottom of cell reaction groove, and sodium hypochlorite outlet 6 is arranged on 3 side of cell reaction groove.
Embodiment 2
A kind of sulfur Gas Fields produced water treatment system, it is characterised in that:Including natural gas stripper 25, integrated hydrogen sulfide Stripping device 26, air sweetening tower 27, preevaporator 28, ammonia nitrogen blowing-off device 29, multi-effect evaporator 30, catalytic and oxidative electrolysis technology dress 31 and crystallizer 32 are put, the natural gas stripper 25 is connected on integrated hydrogen sulfide stripping device 26 by pipeline, described Integrated hydrogen sulfide stripping device 26 is connected with air sweetening tower 27 by pipeline, and the integrated hydrogen sulfide stripping device 26 leads to Piping is connected with preevaporator 28, and the preevaporator 28 is connected with multi-effect evaporator 30 by pipeline, the preevaporator 28 are connected with ammonia nitrogen blowing-off device 29 by pipeline, and the multi-effect evaporator 30 passes through pipeline and 31 phase of electrolysis-catalytic oxidation device Even, the multi-effect evaporator 30 is connected with crystallizer 32 by pipeline, and the crystallizer 32 passes through pipeline and catalytic and oxidative electrolysis technology Device 31 is connected, and the electrolysis-catalytic oxidation device 31 is connected with integrated hydrogen sulfide stripping device 26 by pipeline.
A kind of sulfur Gas Fields produced water treatment system, also including integrated coagulation and filtration device 33, integrated coagulation Defecator 33 is connected on the pipeline between integrated hydrogen sulfide stripping device 26 and preevaporator 28.
Sulfur Gas Fields recovered water is passed through in natural gas stripper, is then passed through natural gas toward natural gas stripper, natural The intake of gas is 70 times that sulfur Gas Fields produce the water yield, and the gas after stripping imports to Gas Purification Factory pressure feed gas pipe Line carries out desulfurization process, generates the sulfur product of high added value, and the liquid after stripping imports to integrated hydrogen sulfide stripping device In carry out hydrogen sulfide stripping process, the gas of generation adds desulfurizing agent that elemental sulfur is obtained through the effect of air sweetening tower again, And hydrogen sulfide is transformed into elemental sulfur or sulfide precipitation in remaining liquid, Jing is filtered and returning for elemental sulfur and sulfide is obtained Thing is received, the air capacity for being passed through integrated hydrogen sulfide stripping device is 800 times of the amount of liquid being passed through;Remaining liquid is passed into pre- Prevapourising is carried out in vaporizer, the temperature of prevapourising is 110 DEG C, when remaining liquid prevapourising amount is to 25%, is transferred to multiple-effect Multiple-effect evaporation is carried out in vaporizer, and the temperature of multiple-effect evaporation is 90 DEG C, ammonia-nitrogen desorption is passed in the distilled water that prevapourising is produced Carry out ammonia-nitrogen desorption in device, stripping ammonia nitrogen out is absorbed with dilute sulfuric acid, generate ammonium sulfate, and the distilled water after stripping and many Distilled water after effect evaporation can reuse, the mother solution that multiple-effect evaporation is produced imports to electrolysis-catalytic oxidation device and carries out electrolytic catalysis oxygen Change is back to integrated hydrogen sulfide stripping device after processing and carries out hydrogen sulfide stripping process, can thus reduce the use of air The discharge capacity of these oxidants is measured and reduces, the salt slurry that multiple-effect evaporation is obtained crystallizes out Nacl through drying crystalline, remaining Liquid is mother solution, and importing to electrolysis-catalytic oxidation device carries out catalytic and oxidative electrolysis technology.It is real to reach pollution-free zero-emission Purpose, and omnibearing recycling has been carried out to the material in recovered water.
When prevapourising is carried out, the liquid after first processing toward integrated hydrogen sulfide stripping device stripping adds hydrogen to the present embodiment The alkaloids such as sodium oxide and sodium carbonate carry out the 3rd step after removing calcium and magnesium and float in liquid again.Its objective is to remove liquid Calcium and magnesium and float in body prevents scaling fouling preevaporator and multi-effect evaporator are produced in prevapourising and multiple-effect evaporation, uses Integrated coagulation and filtration device filters out the calcium and magnesium and float of precipitation, the calcium and magnesium that filtered out using solid waste landfill disposal and outstanding Float.
The ammonia nitrogen blowing-off device that the present embodiment is mentioned includes stripping tank 8, exhaust-gas treatment tank 9 and pump 10, on the stripping tank 8 Air inlet pipe 11, water inlet pipe 12, evacuated tube 13 and outlet pipe 14 are provided with, the air inlet pipe 11 is located at water inlet pipe 12 and outlet pipe 14 Between, water inlet pipe 12 is located at below outlet pipe 14, and aeration head 15, aeration head 15 and air inlet pipe 11 are provided with the stripping tank 8 Be connected, 8 bottom of stripping tank arranges having heaters 17, at the top of the stripping tank 8, be provided with discharge 16, discharge 16 it is another One end is located in exhaust-gas treatment tank 9, and the water inlet of the pump 10 is connected to the bottom of exhaust-gas treatment tank 9, the water outlet of the pump 10 Mouth is connected with water pipe 18, and the other end of water pipe 18 is connected with water-locator 19, and water-locator 19 is located in the top of exhaust-gas treatment tank 9.
Sight glass 20 and glass-tube liquid level 21 are additionally provided with the stripping tank 8, sight glass 20 is arranged on the middle part of stripping tank 8 Position, 21 bottom of glass-tube liquid level extend into the bottom position of stripping tank 8, and the top of stripping tank 8 is extend at the top of glass-tube liquid level 21 Position.
The stripping tank 8 is provided with heat-insulation layer 22.
Two porous plates 23 are provided with the exhaust-gas treatment tank 9, filler 24 between two porous plates 23, is filled with.
The integrated hydrogen sulfide stripping device of the present embodiment is identical with the structure of the stripping tank of ammonia nitrogen blowing-off device, its Including stripping tank, air inlet pipe, water inlet pipe, evacuated tube and outlet pipe are provided with stripping tank, the air inlet pipe is located at water inlet pipe And outlet pipe between, water inlet pipe is located at below outlet pipe, and aeration head, aeration head and air inlet pipe phase are provided with the stripping tank Even, the stripping pot bottom arranges having heaters, and the stripping tank top is provided with discharge, and the other end of discharge is connected to On air sweetening tower.
The electrolysis-catalytic oxidation device mentioned in the present embodiment includes DC source 1, electrode 2 and cell reaction groove 3, electricity Pole 2 is inserted in cell reaction groove 3, and DC source 1 is connected with electrode 2, and cell reaction groove 3 is used to load mother solution, cell reaction Groove 3 is provided with gas outlet 4, inlet 5, sodium hypochlorite outlet 6 and liquid outlet 7, and gas outlet 4 is arranged at the top of cell reaction groove 3, Liquid outlet 7 is arranged on 3 bottom of cell reaction groove, and sodium hypochlorite outlet 6 is arranged on 3 side of cell reaction groove.
Embodiment 3
A kind of sulfur Gas Fields produced water treatment system, it is characterised in that:Including natural gas stripper 25, integrated hydrogen sulfide Stripping device 26, air sweetening tower 27, preevaporator 28, ammonia nitrogen blowing-off device 29, multi-effect evaporator 30, catalytic and oxidative electrolysis technology dress 31 and crystallizer 32 are put, the natural gas stripper 25 is connected on integrated hydrogen sulfide stripping device 26 by pipeline, described Integrated hydrogen sulfide stripping device 26 is connected with air sweetening tower 27 by pipeline, and the integrated hydrogen sulfide stripping device 26 leads to Piping is connected with preevaporator 28, and the preevaporator 28 is connected with multi-effect evaporator 30 by pipeline, the preevaporator 28 are connected with ammonia nitrogen blowing-off device 29 by pipeline, and the multi-effect evaporator 30 passes through pipeline and 31 phase of electrolysis-catalytic oxidation device Even, the multi-effect evaporator 30 is connected with crystallizer 32 by pipeline, and the crystallizer 32 passes through pipeline and catalytic and oxidative electrolysis technology Device 31 is connected, and the electrolysis-catalytic oxidation device 31 is connected with integrated hydrogen sulfide stripping device 26 by pipeline.
A kind of sulfur Gas Fields produced water treatment system, also including integrated coagulation and filtration device 33, integrated coagulation Defecator 33 is connected on the pipeline between integrated hydrogen sulfide stripping device 26 and preevaporator 28.
Sulfur Gas Fields recovered water is passed through in natural gas stripper, is then passed through natural gas toward natural gas stripper, natural The intake of gas is 100 times that sulfur Gas Fields produce the water yield, and the gas after stripping imports to Gas Purification Factory pressure feed gas Pipeline carries out desulfurization process, generates the sulfur product of high added value, and the liquid after stripping imports to integrated hydrogen sulfide stripping dress Hydrogen sulfide stripping process is carried out in putting, the gas of generation adds desulfurizing agent that simple substance is obtained through the effect of air sweetening tower again Sulfur, and hydrogen sulfide is transformed into elemental sulfur or sulfide precipitation in remaining liquid, Jing is filtered and elemental sulfur and sulfide is obtained Regenerant, the air capacity for being passed through integrated hydrogen sulfide stripping device is 1000 times of the amount of liquid being passed through;Remaining liquid leads to Enter in preevaporator to carry out prevapourising, the temperature of prevapourising is 110 DEG C, when remaining liquid prevapourising amount is to 20%, is proceeded to Multiple-effect evaporation is carried out in multi-effect evaporator, and the temperature of multiple-effect evaporation is 115 DEG C, ammonia is passed in the distilled water that prevapourising is produced Ammonia-nitrogen desorption is carried out in nitrogen stripping device, stripping ammonia nitrogen out is absorbed with dilute sulfuric acid, generation ammonium sulfate, and the distillation after stripping Distilled water after water and multiple-effect evaporation can reuse, and the mother solution for producing imports to electrolysis-catalytic oxidation device and carries out electrolytic catalysis oxygen Change is back to integrated hydrogen sulfide stripping device after processing and carries out hydrogen sulfide stripping process, can thus reduce the use of air The discharge capacity of these oxidants is measured and reduces, the salt slurry that multiple-effect evaporation is obtained crystallizes out Nacl through drying crystalline, remaining Liquid is mother solution, and importing to electrolysis-catalytic oxidation device carries out catalytic and oxidative electrolysis technology.It is real to reach pollution-free zero-emission Purpose, and omnibearing recycling has been carried out to the material in recovered water.The present embodiment is when prevapourising is carried out, first toward one Liquid after the process of body hydrogen sulfide stripping device stripping adds the alkaloids such as sodium hydroxide and sodium carbonate to remove in liquid Carry out the 3rd step after calcium and magnesium and float again.Its objective is that the calcium and magnesium and float that remove in liquid are prevented in prevapourising and multiple-effect Scaling fouling preevaporator and multi-effect evaporator are produced during evaporation, with integrated coagulation and filtration device filter out precipitation calcium and magnesium and Float, the calcium and magnesium filtered out using solid waste landfill disposal and float.
The ammonia nitrogen blowing-off device that the present embodiment is mentioned includes stripping tank 8, exhaust-gas treatment tank 9 and pump 10, on the stripping tank 8 Air inlet pipe 11, water inlet pipe 12, evacuated tube 13 and outlet pipe 14 are provided with, the air inlet pipe 11 is located at water inlet pipe 12 and outlet pipe 14 Between, water inlet pipe 12 is located at below outlet pipe 14, and aeration head 15, aeration head 15 and air inlet pipe 11 are provided with the stripping tank 8 Be connected, 8 bottom of stripping tank arranges having heaters 17, at the top of the stripping tank 8, be provided with discharge 16, discharge 16 it is another One end is located in exhaust-gas treatment tank 9, and the water inlet of the pump 10 is connected to the bottom of exhaust-gas treatment tank 9, the water outlet of the pump 10 Mouth is connected with water pipe 18, and the other end of water pipe 18 is connected with water-locator 19, and water-locator 19 is located in the top of exhaust-gas treatment tank 9.
Sight glass 20 and glass-tube liquid level 21 are additionally provided with the stripping tank 8, sight glass 20 is arranged on the middle part of stripping tank 8 Position, 21 bottom of glass-tube liquid level extend into the bottom position of stripping tank 8, and the top of stripping tank 8 is extend at the top of glass-tube liquid level 21 Position.
The stripping tank 8 is provided with heat-insulation layer 22.
Two porous plates 23 are provided with the exhaust-gas treatment tank 9, filler 24 between two porous plates 23, is filled with.
The integrated hydrogen sulfide stripping device of the present embodiment is identical with the structure of the stripping tank of ammonia nitrogen blowing-off device, its Including stripping tank, air inlet pipe, water inlet pipe, evacuated tube and outlet pipe are provided with stripping tank, the air inlet pipe is located at water inlet pipe And outlet pipe between, water inlet pipe is located at below outlet pipe, and aeration head, aeration head and air inlet pipe phase are provided with the stripping tank Even, the stripping pot bottom arranges having heaters, and the stripping tank top is provided with discharge, and the other end of discharge is connected to On air sweetening tower.
The electrolysis-catalytic oxidation device mentioned in the present embodiment includes DC source 1, electrode 2 and cell reaction groove 3, electricity Pole 2 is inserted in cell reaction groove 3, and DC source 1 is connected with electrode 2, and cell reaction groove 3 is used to load mother solution, cell reaction Groove 3 is provided with gas outlet 4, inlet 5, sodium hypochlorite outlet 6 and liquid outlet 7, and gas outlet 4 is arranged at the top of cell reaction groove 3, Liquid outlet 7 is arranged on 3 bottom of cell reaction groove, and sodium hypochlorite outlet 6 is arranged on 3 side of cell reaction groove.
Preevaporator, multi-effect evaporator, natural gas stripper, air sweetening tower and integrated coagulation mistake that the present invention is mentioned Filter device is using preevaporator on the market, multi-effect evaporator, natural gas stripper, air sweetening tower and integrated coagulation and filtration Device.

Claims (6)

1. a kind of sulfur Gas Fields produced water treatment system, it is characterised in that:Including natural gas stripper, integrated hydrogen sulfide stripping Device, air sweetening tower, preevaporator, ammonia nitrogen blowing-off device, multi-effect evaporator, electrolysis-catalytic oxidation device and crystallizer, institute State natural gas stripper to be connected on integrated hydrogen sulfide stripping device by pipeline, the integrated hydrogen sulfide stripping device leads to Piping is connected with air sweetening tower, and the integrated hydrogen sulfide stripping device is connected with preevaporator by pipeline, described pre- Vaporizer is connected with multi-effect evaporator by pipeline, and the preevaporator is connected with ammonia nitrogen blowing-off device by pipeline, described many Effect vaporizer is connected with electrolysis-catalytic oxidation device by pipeline, and the multi-effect evaporator is connected with crystallizer by pipeline, institute State crystallizer to be connected with electrolysis-catalytic oxidation device by pipeline, the electrolysis-catalytic oxidation device passes through pipeline and integrated sulfur Change hydrogen stripping device to be connected.
2. a kind of sulfur Gas Fields produced water treatment system according to claim 1, it is characterised in that:Also include that integration is mixed Solidifying defecator, integrated coagulation and filtration device are connected to the pipeline between integrated hydrogen sulfide stripping device and preevaporator On.
3. a kind of sulfur Gas Fields produced water treatment system according to claim 1 and 2, it is characterised in that:The ammonia nitrogen blows De- device includes stripping tank, exhaust-gas treatment tank and pump, is provided with air inlet pipe, water inlet pipe, evacuated tube and water outlet on the stripping tank Pipe, the air inlet pipe are located between water inlet pipe and outlet pipe, and water inlet pipe is located at below outlet pipe, is provided with exposure in the stripping tank Gas head, aeration head are connected with air inlet pipe, and the stripping pot bottom arranges having heaters, and the stripping tank top is provided with gas collection Pipe, the other end of discharge are located in exhaust-gas treatment tank, and the water inlet of the pump is connected to the bottom of exhaust-gas treatment tank, the pump Outlet be connected with water pipe, the other end of water pipe is connected with water-locator, and water-locator is located in the top of exhaust-gas treatment tank.
4. a kind of sulfur Gas Fields produced water treatment system according to claim 3, it is characterised in that:On the stripping tank also Sight glass and glass-tube liquid level are provided with, sight glass is arranged on the medium position of stripping tank, and glass-tube liquid level bottom extend into stripping tank Bottom position, the tip position of stripping tank is extend at the top of glass-tube liquid level.
5. a kind of sulfur Gas Fields produced water treatment system according to claim 3, it is characterised in that:The stripping tank is arranged There is heat-insulation layer, in the exhaust-gas treatment tank, be provided with two porous plates, between two porous plates, be filled with filler.
6. a kind of sulfur Gas Fields produced water treatment system according to claim 1, it is characterised in that:The electrolytic catalysis oxygen Makeup is put including DC source, electrode and cell reaction groove, and electrode is inserted in cell reaction groove, DC source and electrode phase Even, cell reaction groove is used to load mother solution, and cell reaction groove is provided with gas outlet, inlet, sodium hypochlorite outlet and liquid outlet, Gas outlet is arranged at the top of cell reaction groove, and liquid outlet is arranged on cell reaction trench bottom, and sodium hypochlorite outlet is arranged on electrolysis Reactive tank side.
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